JP3770949B2 - Tuyere replacement method and tuyere stocker used therefor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tuyere replacement method and a tuyere stocker used therefor, and more specifically, a plurality of tuyere can be stored, the consistency of tuyere replacement work, and improvement of workability and safety. The number of workers can be reduced, and on the other hand, when pulling out the tuyere, the catching claw can be automatically positioned in the tuyere without damaging the inner peripheral surface of the Daimaru and the catching claw. The present invention relates to a tuyere replacement method that can be hooked and held without power and a tuyere stocker used therefor.
[0002]
[Prior art]
A tapered cylindrical large circle provided in a protruding state into the furnace is attached to the iron core at the bottom of the blast furnace, and a tuyere that sends hot air from the hot blast furnace into the blast furnace is attached to the deep end. Yes.
Since the tuyere may directly touch the molten iron, it may be worn out and cause a damage accident. Therefore, the tuyere must be replaced periodically.
Conventionally, as this tuyere replacement device, for example, a device described in “Blast furnace tuyere cooling box drawing device” of Japanese Utility Model Laid-Open No. 55-37867 is known.
In this case, a plurality of hook-shaped extraction rods inserted from the inside of the tuyere are hooked to the tip of the tuyere protruding into the blast furnace, and these drawing rods are pulled in by a hydraulic cylinder attached to the forklift truck. Pull out the tuyere from the Daimaru, and then run the forklift truck to remove the tuyere, then attach a new tuyere to the tip of the pulling rod and push it into the tip of the Daimaru with the forklift truck It has become.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional apparatus, when replacing the heavy tuyere thus extracted (usually about 200 kg) with a new tuyere, the tuyere held by the tuyere replacement apparatus at the tuyere exchange place Several workers had manually replaced the new tuyere, so the old tuyelle was pulled out and stored, and the new tuyere was attached, and the exchange work was inconsistent and the workability was poor and dangerous. There was a problem that it was work and the number of workers increased.
In addition, in the conventional device, depending on the intuition of the driver of the forklift truck, the extraction rod attached to the claw must be inserted into the tuyere at the back of the Daimaru, and the tip of the extraction rod There were problems such as damaging the inner surface of the tuyere.
[0004]
Further, the drawing rod after being inserted into the tuyere has to be held in a diameter-enlarged state using a drive unit such as a cylinder, and the toe of the drawing rod has to be hooked on the tip of the tuyere (for example, Japanese Utility Model Sho 62 No. 180055 (refer to the clamping device described in “Attachment / detachment jig for converter bottom blowing tuyere”).
The present invention has been made in view of such circumstances, and can store a plurality of tuyere, improve consistency of tuyere replacement work by the tuyere replacement device and the tuyere stocker, and improve workability and safety. The number of workers can be reduced, and on the other hand, when pulling out the tuyere, the catching claw can be automatically positioned in the tuyere without damaging the inner peripheral surface of the Daimaru and the catching claw. It is an object of the present invention to provide a tuyere replacement method and a tuyere stocker used therefor that can be held and held without power.
[0005]
[Means for Solving the Problems]
The tuyere replacement method according to claim 1, which meets the purpose,A push-type moving carriage that can be driven by wheels, a pedestal provided on the moving trolley, a rotating shaft that is pivotally supported by a pair of bearings on the pedestal, a rotating means for the rotating shaft, and the rotating shaft A rotating body whose center is fixed to the tip of A tuyere stocker having at least three tuyere hooking members arranged at predetermined angles protruding from the rotating body and a tuyere attached to the tip of a tapered cylindrical large circle at the bottom of the furnace is pulled out. A method for replacing the tuyere using a tuyere replacement device,
SaidAttached to the tip of a tapered cylindrical Daimaru at the bottom of the furnaceSaidThe tuyereSaidThe tuyere replacement device grips and pulls out the tuyere, and the tuyere replacement device removes the tuyere.SaidTransport to the tuyere stocker, whereSaidProjected at a predetermined angle on the rotating body of the tuyere stockerSaidOf the at least three tuyere retaining members, the empty tuyere retaining member disposed at the tuyere replacing position in the upper central portion of the rotating body is extracted by the tuyere replacing device. The tuyere was inserted, and then the rotating body was mounted on the tuyere stockerSaidA new tuyere that is rotated by a rotating means and is inserted in the other tuyere retaining member while maintaining the left and right weight balance is disposed at the tuyere replacement position, and then the new tuyere is put on the Extracted by a tuyere replacement device and attached to the furnace bottom.
Further, the tuyere replacement method according to claim 2 is the tuyere replacement method according to claim 1, whereinA floating table provided on the second movable carriage via a lifting device; a moving member having a slide table provided with a head horizontal moving means on the floating table; and the tuyere attached to the front side of the moving member, A tuyere replacement head provided with a latching claw with an opening and closing means that is latched by an elastic member made of a spring while being latched on a latched part consisting of a groove of
The secondMounted on mobile cartSaidOf the horizontal movement means of the headSaidBy moving the moving member to the tuyere side,SecondThe floating means mounted on the moving carriage is activated,SaidThe tuyere replacement head was inserted into the Daimaru so as to be swingable up and down, right and left, and in a turning direction in a horizontal state while being guided by the inner peripheral surface of the Daimaru, and then attached to the tuyere replacement head.SaidBy the biasing force of the elastic member of the opening / closing meansSaidThe hooking claw is automatically closed and formed on the base part protruding outside the tuyereSaidThe hooked portion is hooked by the hooking claws, and thenPull back the moving memberThe tuyere can be pulled out from the Daimaru.
[0006]
Furthermore, the tuyere stocker according to claim 3 is:A tuyere stocker used in the tuyere replacement method according to claim 1 or 2, wherein the hand-held mobile carriage that can be driven by the wheels, the base provided on the mobile truck, The rotating shaft pivotally supported by a pair of bearings on the rotating shaft, rotating means for the rotating shaft, the rotating body having a central portion fixed to the tip of the rotating shaft, and the rotating body at predetermined angles. At least three protruding and arranged, the tuyere pulled out by the tuyere replacement device, and a rod-shaped tuyere hooking member into which the new tuyere can be inserted.
Furthermore, the tuyere stocker according to claim 4 is the tuyere stocker according to claim 3,The gantry has an upper surface of 5 to 10 degrees forward on the movable carriage.Inclined upward.
The tuyere stocker according to claim 5 is the tuyere stocker according to claim 3, wherein the tuyere mounted on each tuyere retaining member during rotation of the rotary body is rotated on the rotary body. A rotation preventing means is provided to prevent the rotation of the tuyere, and by rotating the tuyere retaining member by an amount corresponding to the rotation angle of the rotating body, the rotating tuyere is rotated upward and downward. The tuyere vertical angle position correcting means which is always in the vertical direction is provided.
[0007]
Subsequently, the tuyere stocker according to claim 6 is the tuyere stocker according to claim 5, wherein the tuyere latch members protruding from the rotating body are arranged to face each other about the rotation axis of the rotating body. An outer cylinder-side sprocket that is externally fitted to a fixed outer cylinder that rotatably accommodates the rotational axis of the rotating body, and each tuyere latching member. Is fixed to the base of the outer cylinder side, and the suspension member side sprocket having the same number of teeth as the outer cylinder side sprocket, and the both outer cylinder side sprocket and the both suspension member side sprockets facing each other around the rotation shaft are continuously spanned. Chain.
Then, the tuyere stocker according to claim 7 is the tuyere stocker according to any one of claims 3 to 6, wherein the moving carriage is provided with lifting means for the rotating body.
[0008]
[Action]
In the tuyere replacement method according to claims 1 and 2, and the tuyere stocker according to claims 3 to 7, the tuyere extracted by the tuyere replacement device is transported to the tuyere stocker, where the tuyere stocker The tuyere extracted by the tuyere replacement device is inserted into the empty tuyere retaining member arranged at the tuyere replacement position in the upper center of the rotating body. Because the tuyere is inserted in advance so as to maintain the left and right weight balance, the balance of weight is lost due to the tuyere being inserted into the tuyere latching member at the tuyere replacement position from the outside. As a result, the rotating body does not rotate or fall.
Next, the rotating body is rotated by the rotating means mounted on the tuyere stocker, and the new tuyere is placed at the tuyere replacement position. In this case as well, the weight balance of the tuyere inserted in the rotating body Since it is removed, the new tuyere can be moved to the tuyere replacement position with a relatively small force.
Then, a new tuyere at the tuyere replacement position is gripped by the tuyere replacing device and extracted from the tuyere retaining member, and then the tuyere replacing device is moved and attached to the furnace bottom.
[0009]
In particular, in the tuyere replacement method according to claim 2, when pulling out the tuyere, the tuyere replacement head is disposed substantially at the position opposite to the tuyere using a movable carriage or a head horizontal moving means, Insert the tuyere replacement head into the Daimaru by moving the moving carriage forward or projecting the moving member of the head horizontal moving means. When the catching claw reaches the catching position of the tuyere, the elasticity of the opening and closing means The latching claw is automatically closed by the member, and the latching claw is latched on the latched portion of the tuyere.
At this time, if the axis of the tuyere replacement head is displaced from the axis of the tuyere, the latching claw contacts the inner peripheral surface of the Daimaru while it is being inserted into the Daimaru. However, since the tuyere replacement head swings freely in the vertical and horizontal directions and in the turning direction by the floating means, even if the insertion is continued as it is, the inner peripheral surface of the Daimaru and the latching claw are not damaged.
Further, even during the extraction of the tuyere by the head horizontal moving means, the latching claw is always held by the hooked portion of the tuyere without power by the elastic member of the opening / closing means.
[0010]
In the tuyere stocker according to any one of claims 3 to 7, for example, after all tuyere inserted in the tuyere latching member have been replaced, the moving carriage is moved and transported to another place to replace the tuyere. it can.
In particular, in the tuyere stocker according to claim 4,Due to the tilted base,The tuyere hooked on the tuyere hooking member isRotating bodyHard to come off during rotation.
In the tuyere stocker according to claim 5, the tuyere is prevented from rotating by the detent means, and the tuyere is always kept in the tuyere during the rotation of the rotating body by the tuyere vertical angle position correcting means. Since the top and bottom rotate in the vertical direction, the tuyere replacement device is operated and the tuyere replacement head reaches the tuyere replacement position in the upper center with the tuyere replacement head. When gripping, the tuyere can be gripped in a posture that can be attached to the Daimaru.
[0011]
Furthermore, in the tuyere stocker according to claim 6, since the outer cylinder side and the hooking member side sprockets that are chain-connected to each other constituting the tuyere vertical position correction means have the same number of teeth, the rotating body rotates. When rotating around the shaft, the part of the teeth of the outer cylinder side sprocket that is meshed with the chain moves in the circumferential direction by an angle commensurate with the rotation angle, so that the chain rotates by a predetermined amount. Both tuyere hooking members rotate by a predetermined angle, so that the upper and lower tuyere can always be rotated vertically while the rotating body is rotating.
That is, as shown in FIG. 16, the rotation of the rotating body 115 is temporarily represented as revolution, the rotation of the tuyere latching member 119 protruding on one surface of the rotating body 115 is temporarily represented as rotation, and the first and second outer cylinders When the length from the shaft center of the side sprocket 116 (117) to the shaft center of each locking member side sprocket 120 is the same length L, if the rotating body 115 revolves by an angle θ1, The portion of the cylinder-side sprocket 116 (117) that meshes with the chain 121 moves in the rotational direction by an angle θ1, so that the chain 121 rotates in the direction of the arrow, and thereby the first and second outer cylinder-side sprockets. Each locking member-side sprocket 120 and both tuyere locking members 119 having the same number of teeth as 116 (117) rotate in the direction of the arrow by an angle θ1. Thereby, during the revolution of the rotating body 115, the upper and lower directions of the tuyere 13 and 130 latched by the tuyere latching members 119 always coincide with the vertical direction.
Furthermore, in the tuyere stocker according to claim 7, when the tuyere is inserted into or removed from the tuyere retaining member that has reached the tuyere replacement position in the upper central portion of the rotator, the rotary body is raised and lowered by the lifting means. Then, the tuyere retaining member at the tuyere replacement position is changed to the height of the tuyere replacement head of the tuyere replacement device.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
1 is a perspective view of a tuyere replacement device used in the tuyere replacement method according to the first embodiment of the present invention, FIG. 2 is a plan view showing the same use state, and FIG. 3 is the same use. 4 is an enlarged side view of the main part of the floating means, FIG. 5 is an enlarged front view of the lock cylinder of the floating means, FIG. 6 is an enlarged front view of the main part of the floating means, and FIG. FIG. 8 is a schematic explanatory view of the hydraulic control system, FIG. 9 is an enlarged side view showing the usage state of the tuyere replacement head of another embodiment, and FIG. 11 is a perspective view of the tuyere stocker according to the first embodiment, FIG. 11 is a side view of the tuyere stocker, FIG. 12 is a front view of the tuyere stocker, and FIG. 13 is a tuyere according to the second embodiment of the present invention. FIG. 14 is a plan view of the stocker, FIG. 15 is a front view of the stocker, and FIG. On the tuyere by mouth vertical angular position correcting means is an explanatory diagram showing an operation of correcting downward in the vertical direction.
[0013]
As shown in FIGS. 1 to 3, the tuyere replacement device 10 used in the tuyere replacement method according to the first embodiment of the present invention is a tapered cylinder attached to the iron skin 11 at the bottom of the blast furnace. This is a tuyere replacement device that attaches and removes tuyere 13 to the tip of a large Daimaru 12 and has a battery-type self-propelled movable carriage 14. In addition, an annular groove 13a, which is an example of a hooked portion, is formed on the outer peripheral surface of the tuyere 13 projecting outward from the Daimaru 12, and on the end surface of the tuyere 13 on the base side, A concave depression 13b (see FIG. 7) is formed.
A wheel 15 is attached to the lower part of the moving carriage 14, a traveling motor 16 is attached to the upper part, and a battery 17 is disposed behind the moving carriage 14. A steering handle 18 for pushing is attached on the rear part of the movable carriage 14.
[0014]
A pantograph type lifting device 20 that lifts and lowers a lifting plate 20 a having a hydraulic cylinder (not shown) is mounted on the front portion 14 a of the movable carriage 14. The four-pillar housing the control unit 21 on the lifting plate 20 a. A base 22 is attached, and a circular air spring 23 made of a rubber bag in a plan view is provided at the center of the upper surface of the base 22. On the upper surface of the air spring 23, a floating table 25, which is a horizontally placed gate-shaped frame body that is long in the front-rear direction of the movable carriage 14 and has an opening on the front side, is fixed to the upper surface of the air spring 23. Note that the front end of the floating table 25 protrudes slightly forward from the front end of the movable carriage 14.
Brackets 26 are attached to both outer side surfaces near the front end portion of the floating table 25, and the tuyere replacement apparatus 10 is attached to the iron skin 11 via a small air spring 27 on the front side surface of each bracket 26. An electromagnet 28 that is attracted to and fixed to is provided. Further, a case-like eaves member 29 extending forward is fixed to the side surface of each bracket 26, and a gate frame 25 a is horizontally mounted on the base portion of both brackets 26. Further, the base part of the extraction cylinder 25b of the tuyere 13 which is an example of the head horizontal moving means is fixed to the upper surface of both side parts of the floating table 25.
[0015]
Inside the floating table 25, a frame-shaped slide table 31, which is an example of a moving member, is opened via a linear guide 30 and the rear side is opened. On the rear end portion of the slide table 31, a horizontal frame 31a whose both ends abut against the rod 25c of the drawing cylinder 25b is horizontally mounted.
On the inner surface of the center portion of the rear frame of the floating table 25, a base portion of a two-stage telescopic cylinder 32 in a horizontally placed state, which is another example of the horizontal moving means of the head, is fixed. The portion is fixed to the inner surface of the center portion of the front frame of the slide table 31. The head portion of the telescopic cylinder 32 is attached to the floating table 25. By moving the two-stage rod 33 of the telescopic cylinder 32 in and out, the slide table 31 is inserted and removed from the front end of the floating table 25 via the linear guide 30.
[0016]
A tuyere replacement head 34 is fixed to the front surface of the center portion of the front frame of the slide table 31.
The tuyere replacement head 34 has a square pipe 35 that is rotatable by 45 degrees in the circumferential direction and is fixed to the slide table 31. As shown in FIG. 36 is fixed. A convex portion 36 a that can be fitted into the depressed portion 13 b formed on the end surface on the base portion side of the tuyere 13 is formed at the center of the front surface of the contact plate 36. From each, four pairs of support plates 37 projecting backward extend every 45 degrees.
As shown in FIG. 7, a long hole 38 is formed at the tip of each support plate 37, and between the tip portions of the support plates 37 arranged in pairs, the long holes 38 are loosely inserted. Through the pin 39, a thick latching claw 40 that can be hooked into and removed from the groove 13a of the tuyere 13 is pivotally mounted.
Near the center of the square pipe 35 are fixed two open claw cylinders 41 into which rods 41a are put in and out, and in front of the square pipe 35, the square pipe 35 can be slid through a bush 42. A rear ring 43 that is mounted and opens the pawl claw 40 by pushing forward the bent base 40a of the pawl claw 40 from behind is disposed.
[0017]
In addition, a front ring 44 that closes the latching claw 40 by pushing the base portion 40a from the front to the rear is pushed in front of the base portion 40a of the latching claw 40 via the bush 45. It is slidably mounted on. Further, eight springs 46, which are examples of elastic members, are arranged at predetermined intervals between the center portion side of the contact plate 36 and the front ring 44. Note that the output of the open pawl cylinder 41 is slightly larger than the biasing force of the spring 46.
When the rod 41a of the open claw cylinder 41 is protruded, the base portion 40a is pushed forward through the rear ring 43 while the spring 46 is contracted, so that the latching claw 40 is moved outwardly around the pin 39. When the rod 41a is retracted while being rotated and opened, the base portion 40a of the latching claw 40 is pushed backward by the urging force of the spring 46 and closed. In addition, the opening / closing means 47 of the latching claw 40 is comprised by these component parts 41, 41a, 42-46. Next, the floating means 48 that has the floating table 25 and swings the tuyere replacement head 34 in the vertical and horizontal directions and in the turning direction will be described in detail with reference to FIGS.
[0018]
As shown in FIGS. 4 and 5, a pair of lower inclined brackets 49 that are inclined forward by 45 degrees apart from each other are fixed to both sides of the upper portion of the base 22. An upper inclined bracket 50 that is inclined backward by 45 degrees is fixed to the lower surface of both side portions of the floating table 25 at the front of a predetermined length. The corresponding upper and lower inclined brackets 49 and 50 can be adjusted in length by a screw structure, and can also be a swing rod 52 which is an example of a link that can swing three-dimensionally by the universal joints 51 at both ends. Is suspended in an inclined state. Note that a plate-like link may be used instead of the rod.
A horizontal frame 22a is horizontally mounted at a substantially intermediate height position of the front portion of the base 22, and a lower inclined bracket 53 inclined forward by 45 degrees between one end of the horizontal frame 22a and a column of the base 22 is provided. Is fixed. On the other hand, the rear frame 24a of the mounting table 24 is fixed to the back surface of the center portion of the floating table 25, and the upper frame inclined backward by 45 degrees at one end on the diagonal side with respect to the lower inclined bracket 53 of the horizontal frame 22a. A bracket 54 is fixed. A hydraulic lock cylinder 56 that is slightly longer than the swing rod 52 is attached to the lower inclined bracket 53 via a universal joint 55, and the tip of the rod 56 a is inclined upward via the universal joint 55. The bracket 54 is attached. By moving the rod 56a of the lock cylinder 56 in and out, each swing rod 52 swings while maintaining a parallel state in the front-rear direction, and the tuyere replacement head 34 swings horizontally via the floating table 25. .
[0019]
Here, the control system of the tuyere replacement apparatus 10 will be schematically described with reference to FIG.
As shown in FIG. 8, a battery 17, a control panel 57 constituting the control unit 21, an operation panel 58, a hydraulic unit 59, and a valve stand 60 are provided. When an operation signal is input from the operation panel 58, an operation command is sent from the control panel 57 to the hydraulic unit 59 and the valve stand 60, and each cylinder 25b, 32, 41 and 56 are activated. Next, a tuyere stocker 70 that replaces the tuyere 13 extracted by the tuyere replacement apparatus 10 with a new tuyere 130 and stocks will be described with reference to FIGS.
As shown in FIGS. 10 to 12, the tuyere stocker 70 has a push-type moving carriage 72 that can be driven by wheels 71, and an upper surface of the moving carriage 72 has an angle θ (for example, forward). A pedestal 73 inclined upward by 5 to 10 ° is attached. A hand grip 73 a is attached to the upper rear surface of the gantry 73, and a rotation shaft 75 of an annular rotator 74 disposed in front of the gantry 73 is provided on the front and center of the gantry 73. A pair of bearings 76 to be supported are arranged. On one side of the rotator 74, four rod-shaped tuyere latch members 77 that extend forward at 90 ° intervals in the vertical and horizontal directions protrude, and on the rear portion of the gantry 73, a gear box 78 is used for rotation. A handle 79 for rotating the shaft 75 is disposed. When the handle 79 is rotated, the rotating shaft 75 is rotated via the gear box 78, and thereby the rotating body 74 to which the tuyere retaining member 77 is attached rotates.
[0020]
The upper center portion of the rotating body 74 is at the tuyere replacement position a, and the rotating means 80 of the rotating body 74 is configured by the gear box 78 and the handle 79. Thus, the rotating body 74 is also tilted upward by an angle θ from the vertical state by the gantry 73 tilted upward, so that the tuyere 130 latched by the tuyere latching member 77 rotates the handle 79, It is difficult for the rotating body 74 to come off during rotation.
In FIG. 3, reference numeral 61 denotes a camera attached to the upper portion of the base 22 to monitor the attaching / detaching operation of the tuyere 13 by the tuyere replacement head 34, and in FIG. 11, 81 is a coupling, and 82 is a coupling It is a stopper for the rear wheel 71.
[0021]
Subsequently, the operation of the tuyere replacement device 10 used in the tuyere replacement method according to the first embodiment of the present invention will be described.
As shown in FIG. 7, the rod 41a of the open claw cylinder 41 is protruded in advance, and the latching claw 40 is placed at the open claw position shown by the broken line, and as shown in FIGS. The tuyere stocker 70 arranged at a predetermined tuyere replacement place is positioned by locking the rotation of the rear wheel 71 by the stopper 82, and further, the tuyere latching member 77 other than the tuyere replacement position a. In addition, a new tuyere 130 is inserted.
As shown in FIGS. 2 and 3, when pulling out the tuyere, the tuyere 13 is first moved to the vicinity of the bottom of the blast furnace by the moving carriage 14, and the raising / lowering plate 20 a is moved up and down by the lifting device 20. The shaft core of the tuyere replacement head 34 is approximately matched to the shaft core, and the electromagnet 28 is attracted to the iron skin 11 around the Daimaru 12. As a result, the tuyere replacement device 10 is fixed in a state of being roughly positioned in the blast furnace. In addition, if it aligns while looking in the Daimaru 12 with the camera 61, it can position more correctly.
[0022]
Next, the locked state of the rod 56 a of the lock cylinder 56 is released, and the two-stage rod 33 of the telescopic cylinder 32 is projected in a state where the floating means 48 is operated while monitoring with the camera 61. Thus, by driving the telescopic cylinder 32 while observing the camera, it is possible to prevent damage to the inner peripheral surface of the large circle 12 and the latching claw 40 due to the large displacement of the tuyere replacement head 34.
Due to the protrusion of the two-stage rod 33, the slide table 31 protrudes from the tip of the floating table 25 via the linear guide 30, the tuyere replacement head 34 is inserted into the large circle 12, and the latching claw 40 is shown in FIG. When the hooking position of the tuyere 13 indicated by the two-dot chain line is reached, the rod 41a of the open claw cylinder 41 is retracted. As a result, the latching pawl 40 is automatically rotated inward about the pin 39 by the urging force of the spring 46, and the pawl tip of the latching pawl 40 is latched in the groove 13 a of the tuyere 13 without power. At this time, the convex portion 36 a of the contact plate 36 of the tuyere replacement head 34 is fitted into the depressed portion 13 b of the tuyere 13.
[0023]
If the axial center of the tuyere replacement head 34 is displaced from the axial center of the tuyere 13 during the advancement of the tuyere replacement head 34, the tuyere replacement head 34 is moved to the Daimaru 12. The latching claw 40 contacts the inner peripheral surface of the Daimaru 12 during the insertion. However, the air spring 27 is deformed in response to the contact pressure, and the swing rod 52 swings, so that the tuyere replacement head 34 swings horizontally. It is possible to automatically position the latching claw 40 on the tuyere 13 while preventing damage to the inner peripheral surface and the latching claw 40.
At this time, since the floating table 25 always swings while maintaining a parallel state by the parallel link mechanism including the swing rod 52 arranged in an inclined manner, the tuyere replacement head 34 tilts due to the swing. The inconvenience that the hooking claw 40 cannot be hooked in the groove 13a of the tuyere 13 can be solved.
[0024]
After the hooking claw 40 is hooked on the tuyere 13, the rod 56a of the lock cylinder 56 is locked. Thereby, the tuyere replacement head 34 can be held in the tuyere pulling position by a simple and reliable method.
Then, when the hydraulic system of the two-stage rod 33 of the telescopic cylinder 32 is released and the rod 25c of the extraction cylinder 25b is protruded, the horizontal frame 31a that is in contact with or near the tip of the rod 25c is pushed backward. . As a result, the slide table 31 is pulled back into the floating table 25 while the flange member 29 is pressed against the iron shell 11 with a large force in response to the reaction force, so that the hooking claws 40 are hooked on the tuyere 13. The tuyere replacement head 34 is pulled rearward with a large force, and after the pin 39 slightly slides in the long hole 38 of the support plate 37, a large pulling force is applied to the base of the tuyere 13, and the tuyere 13 Is pulled out from Daimaru 12.
[0025]
Even while the tuyere 13 is being pulled out, the latching pawl 40 is always latched to the groove 13a of the tuyere 13 without power by the spring 46. Since the base portion 40a is pivotally attached to the tuyere replacement head 34 side via the pin 39, when pulling the tuyere 13, the toe of the long hooking pawl 40 bites into the groove 13a of the tuyere 13, Although it is in the micron order, the base portion of the tuyere 13 is contracted by an amount that is sufficiently effective for pulling out, so that the tuyere 13 can be easily pulled out.
Thus, the extracted tuyere 13 is conveyed by the tuyere replacement device 10 to the tuyere stocker 70 arranged at the tuyere replacement place, where it is arranged at the tuyere replacement position a in the upper center portion of the rotating body 74. The tuyere 13 extracted by the tuyere replacement device 10 is inserted into the empty tuyere hooking member 77. At this time, since the new tuyere 130 is inserted into the other three tuyere retaining members 77 in advance so as to maintain the right and left weight balance, the tuyere at the tuyere replacement position a is thus obtained. Even if the tuyere 13 is inserted into the hooking member 77 from the outside, the weight balance of the rotating body 74 is lost, and it is possible to prevent the rotating body 74 from rotating and the tuyere stocker 70 itself from falling down. .
Next, the handle 79 is rotated to rotate the rotating body 74, and the new tuyere 130 is disposed at the tuyere replacement position a. At this time, since the weight balance between the old and new tuyere 13 and 130 inserted in the rotating body 74 is balanced, the new tuyere 130 can be moved to the tuyere replacement position a with a relatively small force.
[0026]
Then, the new tuyere 130 at the tuyere replacement position a is gripped by the tuyere replacing device 10 and extracted from the tuyere retaining member 77, and then the tuyere replacing device 10 is moved, and this is described above. It is attached to the large circle 12 of the iron shell 11 at the bottom of the blast furnace in the manner of the opposite work process.
After all the new tuyere 130 inserted into the tuyere retaining member 77 have been replaced, the stoppers 82 of the wheels 71 are removed and the moving carriage 72 is run and transported to another place in a lump. It can also be exchanged for a tuyere.
Thus, the tuyere 13 extracted by the tuyere replacing device 10 is inserted into the empty tuyere retaining member 77 arranged at the tuyere replacing position a of the rotating body 74 of the tuyere stocker 70. Since the rotating body 74 is rotated by the handle 79 and the new tuyere 130 is moved to the tuyere replacement position a, it is gripped by the tuyere replacement device 10 and attached to the iron core 11 at the bottom of the furnace. By using the tuyere stocker 70, a plurality of tuyere 13 can be stored, and the tuyere replacement work by the tuyere replacement device 10 and the tuyere stocker 70 can be made consistent, and workability and safety can be improved. It is possible to improve performance and reduce the number of workers.
[0027]
Next, a tuyere stocker 100 according to a second embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 13 to 15, the tuyere stocker 100 according to the second embodiment has a hand-held mobile carriage 102 that can be driven by wheels 101, and a portal frame is provided on the mobile carriage 102. 103 is erected. The portal frame 103 is supported on the back by a reinforcing member 104, and guide rails 106 extending in the upward and downward directions are disposed on opposite side surfaces of the long leg frames 105. A horizontal L-shaped lifting frame base 108 is provided between the guide rails 106 through four sliders 107 so as to be vertically movable when viewed from the side.
[0028]
A mounting portion 105 a that protrudes outward is provided at an intermediate portion of the monopod frame 105 of the gate-type frame 103, and the elevator 201 has a handle 201 and a drum 203 for winding the wire 202 on the mounting portion 105 a. A manual winch 204 which is an example of the means is mounted. The wire 202 led upward from the drum 203 is pulled downward from a pulley 206 fixed on the extension portion 205 a of the upper frame 205 of the portal frame 103 through a pulley 207 fixed to the center portion of the upper frame 205. The tip is fixed to the central part of the upper frame 208 of the lifting frame 108.
By rotating the handle 201 of the manual winch 204, the wire 202 is led out or wound up from the drum 203, whereby the lifting frame base 108 is lifted and lowered along the guide rail 106.
[0029]
On the front frame 109a and the central frame 109b of the frame base lower part 109 which is inclined downward to the rear side by a slight angle θ2 of the lifting frame base 108, shaft fixing bases 110 and 111 which are spaced apart from each other are erected. Has been.
Between the shaft fixing bases 110 and 111, the fixed outer cylinder 200 is horizontally mounted in a fixed state parallel to the frame base lower portion 109, and the rotary shaft 112 is pivotally supported in the fixed outer cylinder 200 in a loosely inserted state. In addition, since the frame base lower part 109 is inclined downward to some extent, the tip end portion of the rotating shaft 112 is necessarily inclined upward by the downward inclination.
A portion of the rotating shaft 112 that protrudes rearward from the shaft fixing base 111 is connected to a gear box 113 provided in the middle of the rear frame of the frame base lower portion 109, and the rotating shaft 112 is rotated from the upper surface of the gear box 113. A handle 114 is provided.
A central portion of a rotator 115 having a cross shape when viewed from the front is fixed to a tip portion of the rotating shaft 112, and is supported near the tip portion of the fixed outer cylinder 200 and each tip portion of the rotating body 115. Further, between the base portions of the four tuyere latching members 119, the tuyere latching member 119 is rotated by an amount corresponding to the rotation angle of the rotating body 115, so that the top of the rotating tuyere 13 and 130 is rotated. The tuyere vertical angle position correcting means 209 is provided so that the downward direction is always vertical.
The tuyere vertical angle position correcting means 209 has a first outer cylinder side sprocket 116 and a second outer cylinder side sprocket 117 which are respectively fixed near the tip of the fixed outer cylinder 200.
[0030]
A total of four bearings 118 are disposed at each tip of the rotating body 115, and rod-like wings into which the tuyere 13 and 130 can be inserted into each bearing 118 in parallel to the axis of the rotating shaft 112. The vicinity of the base of the mouth hook member 119 is pivotally supported in a cantilever state. Locking member side sprockets 120 having the same number of teeth as the first outer cylinder side sprocket 116 are fixed to the base portions of the tuyere locking members 119 protruding rearward from the bearing 118.
Between each of the opposing locking member side sprockets 120, an intermediate part is engaged with the fixed first or second outer cylinder side sprockets 116, 117, and a chain 121 is suspended. Therefore, when the rotating body 115 is rotated by rotating the handle 114, the two chains 121 are rotated by an amount corresponding to the rotation angle, whereby each hooking member side sprocket 120 is rotated by the amount of the rotating body 115. Rotate. The specific rotation operation is as described in the section of action with reference to FIG.
[0031]
Near the base of each tuyere latching member 119, a contact plate 124 that contacts the end face of the tuyere 130 via a rib 123 arranged in a T-shape so as to be orthogonal to the axis of the tuyere latching member 119. A water supply pipe 122 that protrudes from the upper part of the tuyere 130 via a pin 126 is fixed between a pair of relatively long support pieces 125 that are fixed to the upper ends of both ends of the contact plate 124. An anti-rotation plate 127, which is an example of an anti-rotation means for latching, is attached to the shaft. A bifurcated hooking portion 127a bent short downward is integrally formed at the front end of the rotation stopper plate 127. Further, near the base portion of the rotation stopper plate 127, it is bent long downward and the tuyere By rotating 130, a rotation operation unit 127 b that automatically rotates the rotation stop plate 127 downward about the pin 126 is integrally formed.
A mounting pin 128 is horizontally mounted between the upper ends of the support pieces 125, and the anti-rotation plate 127 is always rotated upward between both ends of the mounting pin 128 and the vicinity of the base of the anti-rotation plate 127. A pair of springs 129 to be moved are connected. The rotation of the rotation stop plate 127 is restricted to a predetermined angle via a rotation angle restricting means 125a that can adjust the angle of the upward rotation of the support piece 125 by a double bolt nut structure. Has been.
[0032]
When the tuyere 130 is inserted all the way into the tuyere retaining member 119, the end face of the tuyere 130 pushes in the rotation operation part 127b against the spring force of the spring 129, whereby the detent plate 127 is pinned. Rotating downward about 126, the hooking portion 127a at the tip thereof is automatically hooked on the water supply pipe 122, so that the tuyere 130 is dropped due to vibration during movement of the tuyere stocker 100. On the other hand, when the tuyere 130 is pulled out from the tuyere retaining member 119, the anti-rotation plate 127 pivots upward about the pin 126 by the spring force of the spring 129.
13 and 14, reference numeral 102 a is a handle arm of the hand-held mobile carriage 102, and reference numeral 102 b in FIG. 14 is a pedal lock of the mobile carriage 102. Further, in FIG. 15, reference numeral 131 denotes a snap idle.
[0033]
Next, the operation of the tuyere stocker 100 according to the second embodiment of the present invention will be described.
First, like the tuyere stocker 70 according to the first embodiment shown in FIGS. 11 and 12, the tuyere stocker 100 that is previously arranged at a predetermined tuyere replacement place near the blast furnace is moved to the rear side by the pedal lock 102b. The rotation of the wheel 101 is locked for positioning, and a new tuyere 130 is inserted into the tuyere hooking member 119 other than the tuyere replacement position a.
The old tuyere 13 pulled out by the tuyere replacement device 10 is transported by the tuyere replacement device 10 to the tuyere stocker 100 arranged at the tuyere replacement place, where the tuyere in the upper central part of the rotating body 115 is transferred. It is inserted into an empty tuyere hooking member 119 arranged at the replacement position a.
[0034]
At that time, the handle 201 is rotated in advance so that the wire 202 is led out or wound up from the drum 203 of the manual winch 204, and the lifting frame base 108 is moved up and down along the guide rail 106. The height of the tuyere hooking member 119 at the tuyere replacement position a is matched with the height of the gripped tuyere 13.
The tuyere 13 is inserted into the tuyere retaining member 119, and the end surface of the tuyere 13 abuts against the rotation operation portion 127b of the rotation stop plate 127 and pushes it in, thereby resisting the spring force of the spring 129. Then, the detent plate 127 rotates downward about the pin 126, and the latching portion 127 a is latched and stopped by the water supply pipe 122 of the tuyere 13 so that the upper direction and the lower direction of the tuyere 13 are vertical. Positioned easily and without power in the direction.
Thereafter, the handle 114 is turned to rotate the rotary shaft 112 loosely inserted into the fixed outer cylinder 200, thereby rotating the rotating body 115 by 90 °, thereby bringing the new tuyere 130 into the tuyere replacement position a. Deploy. At this time, as shown in FIG. 16, when the rotating body 115 is rotated (revolved) by an angle θ1, the portions engaging the respective chains 121 of the first and second outer cylinder side sprockets 116 and 117 are rotated by an angle θ1. As a result, the chain 121 rotates in the direction of the arrow, so that each hook member side sprocket 120 and both tuyere hooks having the same number of teeth as the first and second outer cylinder side sprockets 116, 117 are obtained. Each member 119 rotates (spins) in the direction of the arrow by an angle θ1. Therefore, during rotation (revolution) of the rotating body 115 in which each water supply pipe 122 is positioned by the latching portion 127a, the upper and lower directions of the tuyere 13 and 130 latched by the tuyere latching member 119 are always Matches the vertical direction.
[0035]
As described above, the rotation of the tuyere 13 and 130 is prevented by the detent plate 127, and the tuyere 13 and 130 are always kept in the tuyere 13 during the rotation of the rotating body 115 by the tuyere vertical angle position correcting means 209. , 130 is rotated in the vertical direction so that the tuyere replacement device 10 is operated and the tuyere replacement head 34 has reached the tuyere replacement position a in the upper center by the tuyere replacement head 34. When gripping the groove portions 13 a of the 13 and 130, the tuyere 13 and 130 can be gripped in a correct posture that can be attached to the Daimaru 12.
Then, the new tuyere 130 that has reached the tuyere replacement position a is gripped by using the tuyere replacing device 10, and then extracted from the tuyere retaining member 119, and then the tuyere replacing device 10 is moved, Is attached to the large circle 12 of the iron shell 11 at the bottom of the blast furnace in the same manner as the above-described reverse work process. When the tuyere 130 is pulled out of the tuyere retaining member 119, the end face of the tuyere 130 is disengaged from the turning operation unit 127b, so that the detent plate 127 is rotated upward by the spring force of the spring 129, As a result, the detent plate 127 does not hinder the extraction of the tuyere 130 from the tuyere retaining member 119.
[0036]
Thus, as the tuyere vertical angle position correcting means, the first and second outer cylinder side sprockets 116 and 117 and the four hooking member side sprockets 120 having the same number of teeth connected to each other via the chain 121 are provided. Since the chain-linked tuyere vertical position correction means 209 is adopted, the structure is relatively simple and inexpensive, and the upper and lower tuyere 13 and 130 are always held vertically while the rotating body 115 is rotating. A possible tuyere stocker 10 can be provided.
Further, the rotating body 115 is moved up and down by the manual winch 204 so that the height of the tuyere hooking member 119 at the tuyere replacing position a of the rotating body 115 is set to the tuyere replacing head 34 of the tuyere replacing apparatus 10. Therefore, the tuyere replacement head 34 can easily and smoothly insert and remove the tuyere 130 into and from the tuyere retaining member 119.
[0037]
The present invention has been described with reference to the drawings. However, the present invention is not limited to this embodiment, and design changes and the like within a scope not departing from the gist are also included in the present invention.
For example, in the embodiment, the groove portion is shown as the hooked portion provided in the tuyere. However, the embodiment is not limited to this, and may be a protrusion, for example.
In addition, the tuyere replacement head including the hooking claw opening / closing means, the floating means, and the head horizontal moving means are not limited to those having the structure of the embodiment, as long as they have structures that fulfill their functions. It can be anything.
Furthermore, the number of the hooking claws formed may be an arbitrary number, and the elastic member for automatically closing the hooking claws is not limited to the spring, but may be other elastic members such as rubber.
[0038]
Furthermore, as shown in FIG. 9, a guide roller 62 can be attached to the outside of the front end of the latching claw 40 to prevent the latching claw 40 from coming into contact with the large circle 12. Damage to the contact portions of both members 12, 40 can be significantly reduced.
Further, the tuyere replacement device is not limited to the device having the structure of the embodiment, and any device having any other structure can be used as long as the tuyere can be extracted or attached from the bottom of the blast furnace. Good.
Further, in the embodiment, the four tuyere hooking members are projected on the peripheral surface of the rotating body of the tuyere stocker. However, the present invention is not limited to this. There should be at least three.
Further, in the embodiment, the rotating body of the tuyere stocker is inclined slightly upward from the vertical state, but the rotating body may be arranged vertically without being limited to this.
Furthermore, the rotating means of the rotating body is not limited to the one described in the embodiment, and may be of any other structure such as an automatic means using an electric motor or the like.
[0039]
In the second embodiment, as a tuyere detent means inserted in the tuyere latching member, the tuyere pivots upward and downward by a spring and latches at the tip of the tuyere water supply pipe Although a rotation stop plate having a possible bifurcated latching part was adopted, the type is not limited to this. For example, what kind of form is used, for example, a part of the tuyere is gripped by a claw-shaped clamper But you can.
Also, in the second embodiment, the tuyere vertical angle position correcting means is a chain interlocking type, but any other type of tuyere vertical angle position correcting means is not limited to this. But you can.
Furthermore, in the second embodiment, the number of tuyere hooking members protruding from the rotating body is four. However, the number is not limited to this, and even numbers such as two, six, eight, etc. may be used. Any book can be used. In that case, the outer tube side sprocket is required at a ratio of one tuyere hooking member to two.
In the second embodiment, the manual winch is adopted as the lifting means of the rotating body. However, the present invention is not limited to this, and for example, an electric winch, a feed screw type lifting device, a pantograph type lifting device, etc. Any type of lifting means may be used.
Further, the lifting means may be omitted, and the rotating body may be fixedly attached to a predetermined position of the moving carriage.
[0040]
【The invention's effect】
In the tuyere replacement method according to claim 1 or 2 and the tuyere stocker according to claims 3 to 7, the tuyere thus extracted by the tuyere replacement device is used as a wing of a rotating body of the tuyere stocker. It is inserted into an empty tuyere hooking member arranged at the mouth replacement position, and the rotating body is rotated by the rotating means to move the new tuyere to the tuyere replacement position. Since it is gripped and attached to the bottom of the blast furnace, multiple tuyere can be stored by using the tuyere stocker, and the consistency of tuyere replacement work by the tuyere replacement device and tuyere stocker As a result, workability and safety can be improved, and the number of workers can be reduced.
In particular, in the tuyere replacement method according to claim 2, by providing floating means for swinging the tuyere replacement head in the horizontal and vertical and horizontal directions and in the turning direction, If the tuyere is misaligned with the tuyere's shaft core, the floating means will be activated when the catching pawl is lightly touching the inner circumference of the Daimaru while it is being inserted into the Daimaru. Since the replacement head swings freely in the vertical and horizontal directions and in the turning direction, the latching claw can be automatically positioned at the tuyere latching position without damaging the inner circumferential surface of the Daimaru and the latching claw.
In addition, since the tuyere replacement head is provided with a latching claw opening / closing means that automatically closes by the biasing force of the elastic member, when the latching claw reaches the latching position of the tuyere, the elasticity of the opening / closing means The hooking claw is automatically closed by the member, and the hooking claw can be hooked on the hooked portion of the tuyere without power.
[0041]
In the tuyere stocker according to claims 3 to 7, the moving bogie can be run to transport the tuyere before and after the replacement in a lump.
In particular, in the tuyere stocker according to claim 4,Due to the tilted base,The tuyere hooked on the tuyere hooking member isRotating bodyHard to come off during rotation.
Further, in the tuyere stocker according to claim 5, the anti-rotation means for preventing the tuyere from rotating by the anti-rotation means, and the tuyere is always vertically above and below the tuyere during rotation of the rotating body. Since the tuyere upper / lower angle position correction means that rotates in the direction is provided, when the tuyere replacement device grips the new tuyere that has reached the tuyere replacement position in the upper center, Can be held in a posture that can be attached to the
[0042]
In the tuyere stocker according to claim 6, as the tuyere vertical angle position correcting means, the chain interlocking type sprocket having the same number of teeth on the outer cylinder side and the both latching member side sprockets connected to each other via the chain. Since the tuyere vertical angle position correcting means is employed, it is possible to provide a tuyere stocker that is relatively simple in structure and inexpensive and that can always hold the top and bottom of the tuyere vertically during rotation of the rotating body.
In the tuyere stocker according to claim 7, the rotating body is moved up and down by the lifting means, and the height of the tuyere retaining member at the tuyere replacement position of the rotating body is set to the tuyere holder of the tuyere replacing device. Since the height of the replacement head can be adjusted, the tuyere replacement head can be easily and smoothly inserted into and removed from the tuyere hooking member.
[Brief description of the drawings]
FIG. 1 is a perspective view of a tuyere replacement device used in a tuyere replacement method according to a first embodiment of the present invention.
FIG. 2 is a plan view showing the same use state.
FIG. 3 is a side view showing the same use state.
FIG. 4 is an enlarged side view of the main part of the floating means.
FIG. 5 is an enlarged front view of a lock cylinder of the floating means.
FIG. 6 is an enlarged front view of the main part of the floating means.
FIG. 7 is an enlarged side view showing a usage state of the tuyere replacement head.
FIG. 8 is a schematic explanatory diagram of the hydraulic control system.
FIG. 9 is an enlarged side view showing a usage state of a tuyere replacement head according to another embodiment.
FIG. 10 is a perspective view of the tuyere stocker according to the first embodiment of the present invention.
FIG. 11 is a side view of a tuyere stocker.
FIG. 12 is a front view of a tuyere stocker.
FIG. 13 is a side view of a tuyere stocker according to a second embodiment of the present invention.
FIG. 14 is a plan view of the same.
FIG. 15 is a front view of the same.
FIG. 16 is an explanatory view showing an operation of correcting the upper and lower directions of the tuyere in the vertical direction by the tuyere vertical angle position correcting means when the rotating body rotates.
[Explanation of symbols]
10 Tail replacement device 11 Iron skin
12 Daimaru 13 tuyere
13a groove 13b depression
14 Mobile trolley 14a Front
15 wheels 16 travel motor
17 Battery 18 Steering handle
20 Lifting device 20a Lifting plate
21 Control unit 22 Base
22a Horizontal frame 23 Air spring
24 Mounting table 24a Rear frame
25 Floating table 25a Gate formwork
25b Pulling cylinder 25c Rod
26 Bracket 27 Air spring
28 Electromagnet 29 Spear Member
30 Linear guide 31 Slide table
31a Horizontal frame 32 Telescopic cylinder
33 Two-stage rod 34 Head replacement head
35 square pipe 36 contact plate
36a Convex part 37 Support plate
38 long hole 39 pin
40 latching claw 40a base part
41 Open claw cylinder 41a Rod
42 Bush 43 Rear ring
44 Front ring 45 Bush
46 Spring 47 Opening / closing means
48 Floating means 49 Lower tilt bracket
50 Upper inclined bracket 51 Universal joint
52 Swing rod 53 Lower tilt bracket
54 Upper inclined bracket 55 Universal joint
56 Lock cylinder 56a Rod
57 Control panel 58 Operation panel
59 Hydraulic unit 60 Valve stand
61 Camera 62 Guide roller
70 tuyere stocker 71 wheels
72 Moving cart 73 Mount
73a Handle 74 Rotating body
75 Rotating shaft 76 Bearing
77 Tuyere retaining member 78 Gear box
79 Handle 80 Rotating means
81 Coupling 82 Stopper
100 tuyere stocker 101 wheels
102 moving carriage 102a handle arm
102b Pedal lock 103 Gate type frame
104 Reinforcement material 105 Leg frame
105a Mounting part 106 Guide rail
107 Slider 108 Lifting frame base
109 Lower frame base 109a Front frame
109b Center frame 110 Shaft fixing base
111 Axis fixed base 112 Rotating shaft
113 Gearbox 114 Handle
115 Rotating body 116 First outer cylinder side sprocket
117 Second outer cylinder side sprocket 118 Bearing
119 Tuyere retaining member 120 Suspension member side sprocket
121 Chain 122 Water supply pipe
123 Rib 124 Contact plate
125 support piece 125a rotation angle regulating means
126 pin 127 detent plate
127a Hanging part 127b Rotation operation part
128 Mounting pin 129 Spring
130 tuyere 131 snap idol
200 Fixed outer cylinder 201 Handle
202 wire 203 drum
204 Manual winch 205 Upper frame
205a Extension part 206 pulley
207 pulley 208 upper frame base
209 Tuyere vertical angle position correction means a Tuyere replacement position
L Length L

Claims (7)

A push-type moving carriage that can be driven by wheels, a pedestal provided on the moving trolley, a rotating shaft that is pivotally supported by a pair of bearings on the pedestal, a rotating means for the rotating shaft, and the rotating shaft A tuyere stocker having a rotating body whose central part is fixed to the tip of the knives, and at least three tuyere hooking members that protrude from the rotating body at predetermined angles, and a tapered cylindrical shape at the bottom of the furnace A method of replacing the tuyere using a tuyere replacement device that grips and pulls out the tuyere attached to the tip of Daimaru,
Said tuyere attached to the tip of Daimaru tapered cylindrical the furnace bottom, pulling grips by said tuyere replacement device, the withdrawn said tuyere, the tuyere by the tuyere replacement device It conveyed to the stocker, where among the at least three tuyeres latch member which is projected every predetermined angle rotation of the tuyere stocker, disposed tuyere replacement position of the upper center portion of the rotary body and the tuyere latch member of the air, and inserted the tuyere replacement the tuyere withdrawn by the device, then the rotating body rotates by the rotation means mounted on said tuyere stocker After the new tuyere that has been inserted in the other tuyere retaining member while maintaining the left and right weight balance is disposed at the tuyere replacement position, the new tuyere is moved by the tuyere replacement device. A tuyere that is extracted and attached to the bottom of the furnace Method. As the tuyere replacement device, a floating table provided on a second movable carriage via a lifting device, a moving member having a slide table in which a head horizontal moving means is provided on the floating table, A tuyere replacement head provided with a hooking claw with an opening and closing means attached to the front side and hooked to a hooked part made of a groove part of the tuyere and closed by an elastic member made of a spring;
Wherein the said movable member of the second of said head horizontally moving means mounted on the moving carriage to move to the tuyere side, operating the onboard floating means to the second movable carriage, said tuyere replacement heads, the while being guided by the large Marunouchi circumferential surface, is inserted into swingably large-Marunouchi section into vertical and horizontal and the turning direction in a horizontal state, then the on-off attached to the tuyere replacement head wherein the biasing force of the resilient member means engaging claw is automatically閉爪, wherein the engaging portion formed in the base portion of the external projection of the tuyeres is hooked by the hooking pawl, then, The tuyere replacement method according to claim 1, wherein the moving member is pulled back so that the tuyere can be pulled out from the Daimaru. A tuyere stocker used in the tuyere replacement method according to claim 1 or 2, wherein the hand-held mobile carriage that can be driven by the wheels, the base provided on the mobile truck, The rotating shaft pivotally supported by a pair of bearings on the rotating shaft, rotating means for the rotating shaft, the rotating body having a central portion fixed to the tip of the rotating shaft, and the rotating body at predetermined angles. A tuyere having at least three protruding and arranged, the tuyere being pulled out by the tuyere replacement device, and a rod-like tuyere hooking member into which the new tuyere can be inserted Stocker. The tuyere stocker according to claim 3 , wherein an upper surface of the frame is inclined upward by 5 to 10 degrees toward the front on the movable carriage .   The rotating body is provided with a detent means for preventing rotation of the tuyere attached to each tuyere latching member during rotation of the rotating body, and the rotating body is provided at a rotation angle of the rotating body. 2. A tuyere up / down angle position correcting unit is provided to rotate the tuyere latching member by an amount corresponding to the vertical direction of the rotating tuyere above and below. The tuyere stocker according to 3.   The tuyere latching members protruding from the rotating body are even numbers arranged opposite to each other around the rotating shaft of the rotating body, and the tuyere vertical angle position correcting means is the rotating shaft of the rotating body. An outer cylinder-side sprocket that is externally fitted to a fixed outer cylinder that rotatably accommodates and a hook member-side sprocket having the same number of teeth as that of the outer cylinder-side sprocket. The tuyere stocker according to claim 5, further comprising: a chain that is continuously stretched between the outer cylinder side sprocket and the two locking member side sprockets opposed to each other with the rotation shaft as a center.   The tuyere stocker according to any one of claims 3 to 6, wherein said moving carriage is provided with means for raising and lowering said rotating body.

Images