JP2012184459A - Impact tuyere replacing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an impact tuyere replacing apparatus, in which the angle of movement of a part fixed onto a tuyere can be changed.SOLUTION: The impact tuyere replacing apparatus 10 is equipped with: a self-propelled trolley 11; a double-shaft hydraulic cylinder 13 attached to the self-propelled trolley 11 via a support pedestal 12; a tuyere fixture 15 coupled to a tip of a piston rod 14 of the hydraulic cylinder 13; and an air hammer 16 that applies an impact force to the tuyere fixture 15 in a direction of pulling out the same. The apparatus 10 holds the tuyere 17 having the tuyere fixture 15 inserted into a through-hole 17a formed on the tuyere 17, so as to fix or remove the tuyere 17 into or from a tuyere support 18 attached to a blast furnace. The orientations of the tuyere fixture 15, the hydraulic cylinder 13 and the air hammer 16, which are linearly arranged, are changed by tilting of the support pedestal 12 according to the orientation of the through-hole 17a of the tuyere 17 fixed into the tuyere support 18, and a piston 65 is struck onto a holder 53 housing the air hammer 16 in a direction of pulling out the tuyere 17, thereby removing the tuyere 17 fixed into the tuyere support 18.

Description

The present invention relates to a blow-type tuyere replacement machine that attaches / detaches tuyere to a Daimaru attached to a blast furnace.

A tapered circular Daimaru is attached to the furnace wall of the blast furnace. A through hole is formed at the tip of the Daimaru, and a tuyere that sends hot air from the hot stove into the blast furnace is attached. The tuyere may need to be replaced periodically because it may be damaged by the hot metal, and once this was done manually, the tuyere replacement machine was used for efficient and safe work. Have been used, and specific examples thereof are described in Patent Documents 1 and 2.
The tuyere replacement machine of Patent Document 1 fixes a tuyere replacement head capable of moving up and down, left and right, and turning to a tuyere fixed to the Daimaru and using the force of a hydraulic cylinder to After removing the mouth, a new tuyere is attached to Daimaru.
In the tuyere replacement machine of Patent Document 2, a hydraulic cylinder and an air hammer that strikes in the pulling direction are arranged in series, and the tuyere is removed and attached to the Daimaru using the striking force of the air hammer in addition to the force of the hydraulic cylinder. Do.

JP-A-8-134523 Japanese Utility Model Publication No. 7-21754

However, both of the tuyere replacement machines of Patent Documents 1 and 2 have a fixed advancing / retreating direction of the portion fixed to the tuyere (the tuyere replacement head in Patent Document 1) with respect to Daimaru, and the through hole of the tuyere There is a problem that the tuyere cannot be removed when is tilted more than a certain angle with respect to Daimaru.
The present invention has been made in view of such circumstances, and an object thereof is to provide a batting type tuyere replacement machine in which the angle of the advancing / retreating direction of the portion fixed to the tuyere is variable.

A striking tuyere replacement machine according to the present invention that meets the above-described object includes a self-propelled carriage, a double-shaft hydraulic cylinder attached to the self-propelled carriage via a support frame, and a piston rod of the hydraulic cylinder. A tuyere having a tuyere having a through hole formed therein having a tuyere fixing device connected to the distal end side and an air hammer connected to a proximal end side of the piston rod and giving a striking force in the pulling direction to the tuyere fixing device. In the blow-type tuyere replacement machine that attaches and detaches the tuyere to the Daimaru that is held in a state where the tuyere fixture is inserted into the through hole and is attached to a predetermined position of a blast furnace
The support frame is tilted about a horizontal pin horizontally mounted on the self-propelled carriage, and the orientation of the tuyere fixture, the hydraulic cylinder, and the air hammer arranged in a straight line is attached to the Daimaru. The base end side of the piston rod is fixed to a holding material that houses the air hammer, and the tuyere is pulled out from the Daimaru with respect to the holding material. Then, the piston that the air hammer reciprocates is hit to remove the tuyere fixed to the Daimaru.

In the blow-type tuyere replacement machine according to the present invention, the holding member is attached to a guide rail tilting together with the support frame so as to be able to advance and retreat, and the guide rail is arranged in parallel to the piston rod. Is preferred.

In the blow-type tuyere replacement machine according to the present invention, a strut rod that advances and retreats by actuation of an actuator is provided on the front side of the support frame, and when the tuyere is removed from the Daimaru, the strut rod is moved to the furnace of the blast furnace. It is preferable to prevent the self-propelled carriage from falling over by contacting the wall.

In the striking tuyere replacement machine according to the present invention, it is preferable that the tension rods are respectively disposed on the left and right sides of the piston rod, and the tension rods advance and retreat in parallel with the piston rod.

In the blow-type tuyere replacement machine according to the present invention, it is preferable that a tilting hydraulic cylinder for tilting the support frame at a predetermined angle is attached to the self-propelled carriage.

In the blow-type tuyere replacement machine according to the present invention, the self-propelled carriage is provided with a clamp, and the clamp fixes the self-propelled carriage to the furnace wall of the blast furnace, and It is preferable to position the carriage.

The blow-type tuyere replacement machine according to the present invention includes a tuyere through-hole attached to the Daimaru with the support frame tilted so that the orientation of the tuyere fixture, hydraulic cylinder, and air hammer arranged in a straight line is large. Therefore, even if the inclination of the through hole of the tuyere fixed to the Daimaru differs depending on the blast furnace, each tuyere fixture can be adjusted to the orientation that can hold the tuyere. The tuyere attached to the blast furnace can be replaced.
In addition, the piston of the air hammer is struck in the direction of pulling the tuyere from the Daimaru to the holding material that houses the air hammer, and the tuyere fixed to the Daimaru is removed. It is possible to remove the tuyere reliably by applying a striking force in the direction.

In the blow-type tuyere replacement machine according to the present invention, when the holding member is movably attached to a guide rail arranged parallel to the piston rod, the striking force applied to the holding member by striking the piston Can be made to coincide with the retraction direction of the piston rod, and the striking force of the air hammer and the force of retreating the piston rod by the hydraulic cylinder can be efficiently applied to the tuyere.

In the blow-type tuyere replacement machine according to the present invention, it has a tension rod that advances and retreats by the operation of the actuator on the front side of the support frame, and when the tuyere is removed from the Daimaru, the tension rod abuts against the furnace wall of the blast furnace. In order to prevent the self-propelled carriage from toppling over, the strut rod is adjusted in the advancing / retreating position according to the positional relationship between the self-propelled carriage and the furnace wall, and can reliably contact the furnace wall.

In the blow-type tuyere replacement machine according to the present invention, when the tension rods are respectively arranged on the left and right of the piston rod, and each tension rod advances and retreats in parallel with the piston rod, the law of action and reaction when removing the tuyere The strength of the force acting on the tuyere fixture can be received from the furnace wall to prevent the self-propelled cart from falling, and the magnitude of the force received from the furnace wall to prevent the self-propelled cart from falling It is possible to suppress the occurrence of failure and the like.

In the blow-type tuyere replacement machine according to the present invention, when the tilting hydraulic cylinder for tilting the support frame to a predetermined angle is attached to the self-propelled carriage, the support frame can be reliably tilted.

In the blow-type tuyere replacement machine according to the present invention, when the clamp fixes the self-propelled carriage to the furnace wall of the blast furnace and positions the self-propelled carriage with respect to Daimaru, when replacing the first tuyere By recording the tilt angle of the support frame, the piston rod's advance / retreat position, etc., when replacing the second and subsequent tuyere, the tilt of the support frame, the advance / retreat of the piston rod, etc. are recorded based on the records. By doing so, it is possible to efficiently replace the tuyere.

It is a partially-omitted side view of the blow-type tuyere replacement machine according to one embodiment of the present invention. It is a top view of the blow type tuyere replacement machine. It is a block diagram which shows the signal connection of the control part of the batting type tuyere replacement machine. (A), (B) is explanatory drawing which shows the method of fixing a tuyere to a latching rod. It is a partially cutaway side view showing an air hammer and a holding material. It is a side view showing the state where the support frame of the blow type tuyere replacement machine concerning one embodiment of the present invention has been arranged vertically.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1 to 3, a blow-type tuyere replacement machine 10 according to an embodiment of the present invention includes a self-propelled carriage 11 and both attached to the self-propelled carriage 11 via a support frame 12. A shaft-type hydraulic cylinder 13, a tuyere fixture 15 connected to the distal end side of the piston rod 14 of the hydraulic cylinder 13, and a striking force in the pulling direction to the tuyere fixture 15 connected to the proximal end side of the piston rod 14 An air hammer 16 for holding the tuyere 17 with the through hole 17a formed therein and holding the tuyere fixture 15 in the through hole 17a with the tuyere 18 attached to a predetermined position of the blast furnace. The tuyere 17 is attached and detached. Details will be described below.

As shown in FIGS. 1 and 2, a furnace wall 20 of the blast furnace is provided with a plurality of annular fittings 21, and tapered cylindrical large circles 18 are attached to the arrangement positions of the respective annular fittings 21. . A tapered tuyere 17 is attached to the front side of each Daimaru 18, and the annular bracket 21, Daimaru 18 and tuyere 17 form a water channel for sending cooling water for self-cooling. is doing.
The tuyere 17 is used by being fixed to the large circle 18 in a state in which the base side of the outer peripheral surface is in contact with the inner peripheral surface of the large circle 18, and the molten iron or the like is worn and touched. Therefore, the tuyere 17 is periodically replaced by the striking tuyere changer 10.
1 and 2 are a side view and a plan view, respectively, but the cross section is shown for the tuyere 17, the large circle 18, and the annular fitting 21. FIG.

The striking tuyere replacement machine 10 has a crawler-type self-propelled carriage 11 and a support base 12 attached to the self-propelled carriage 11 so as to be tiltable. The support base 12 holds a hydraulic cylinder 13 at an upper portion thereof. A cylinder support frame 22 is provided.
The self-propelled carriage 11 includes a base frame 23 disposed in the center and a caterpillar 24 provided on the left and right of the base frame 23, and can perform forward movement, backward movement, turning operation, and the like. The base frame 23 has a stepping area for the worker at the rear, and the worker can stand at the rear of the base frame 23 and operate the blow-type tuyere replacement machine 10.

Horizontal pins 25 and 25a are horizontally mounted on the left and right sides of the base frame 23, and the support frame 12 tilts about the horizontal pins 25 and 25a. The horizontal pins 25, 25 a are arranged coaxially and are attached to the base frame 23 via bearings 28.
Further, a hydraulic cylinder 27 (tilting hydraulic cylinder) is attached to the base frame 23 in a standing state via a horizontal shaft 26 arranged in parallel to the horizontal pins 25 and 25a. The hydraulic cylinder 27 operates in response to an operation signal from a control unit 29 (see FIG. 3) connected to the hydraulic cylinder 27 as a signal, and tilts the support frame 12 to a predetermined angle.
Note that the control unit 29 can be configured by a microcomputer or the like equipped with a program for sending an operation signal to the hydraulic cylinders 13 and 27, the air hammer 16, the self-propelled carriage 11, and the like.
Further, as shown in FIG. 3, an operation panel 29a is signal-connected to the control unit 29, and the control unit 29 is configured to operate the hydraulic cylinders 13, 27, the air hammer 16, An operation signal is transmitted to the self-propelled carriage 11 or the like.

As shown in FIGS. 1 and 2, the support frame 12 includes a bar material 30 connected to the base frame 23 via a horizontal pin 25 and a bar material 30 a connected to the base frame 23 via a horizontal pin 25 a. Are provided on the left and right respectively.
A horizontal support member 31 for connecting the rod members 30, 30 a is fixed to the rod members 30, 30 a, and one side of the horizontal support member 31 is rotatably attached to the cylinder rod 33 of the hydraulic cylinder 27. The other side of the link member 32 is rotatably connected. Therefore, the bar material 30, 30 a is tilted by the vertical movement of the cylinder rod 33.

The support frame 12 has guide rails 34 and 34a fixed to the rod members 30 and 30a, respectively, and a gate frame 36 attached to the guide rails 34 and 34a through a plurality of slide blocks 35 so as to be movable up and down. A pedestal 37 fixed to the upper part of the portal frame 36 is provided.
The pedestal 37 is connected to the other side of the reinforcing member 38 whose one side is connected to the portal frame 36, and maintains a certain angle (90 degrees in the present embodiment) with respect to the portal frame 36.
The portal frame 36, the pedestal 37, and the reinforcing member 38 can be integrally moved up and down along the guide rails 34, 34a. The base frame 23 of the self-propelled carriage 11 has the portal frame 36, the pedestal 37, and the reinforcement. A hydraulic cylinder 39 for raising and lowering the material 38 is attached to be tiltable.
The hydraulic cylinder 39 includes a piston rod 40 connected to the lower portion of the pedestal 37, receives the operation signal from the control unit 29, and raises and lowers the piston rod 40 to raise and lower the portal frame 36, the pedestal 37, and the reinforcing material 38.

A front guide rail 41 and a rear guide rail 42 arranged along the left and right direction (the direction parallel to the horizontal pins 25 and 25a, the same applies hereinafter) are fixed to the tops of the gate frame 36 and the base 37, respectively. Yes. The cylinder support frame 22 to which the hydraulic cylinder 13 is fixed is movably attached to the front guide rail 41 and the rear guide rail 42. By the operation of the hydraulic cylinder 39, the cylinder support frame 22 becomes a portal frame. 36, the pedestal 37 and the reinforcing member 38 are integrally moved up and down.
The cylinder support frame 22 is provided with a front slide block 43 and a rear slide block 44 that are movably attached to the front guide rail 41 and the rear guide rail 42 at the lower part, and the cylinder to which the hydraulic cylinder 13 is fixed forward and backward. Mounting portions 45 and 45a are arranged.

A hydraulic cylinder 49 for moving the cylinder support frame 22 along the front slide block 43 and the rear slide block 44 is attached to the pedestal 37 (see FIG. 3). The hydraulic cylinder 49 receives an operation signal from the control unit 29. The cylinder support frame 22 is moved in the left-right direction with respect to the support frame 12.
The cylinder support frame 22 includes guide plates 46 and 46a that are opposed to each other on the left and right sides of the hydraulic cylinder 13 and reinforcing plates 47 and 48 that keep the guide plates 46 and 46a in parallel. The reinforcing plates 47 and 48 are respectively fixed to the front and rear of the cylinder support frame 22 by known screw members, and the reinforcing plate 48 is formed with a through hole through which the piston rod 14 of the hydraulic cylinder 13 is inserted.

A slide frame 50 that is guided by the guide plates 46 and 46 a and advances and retreats together with the piston rod 14 is attached to the guide plates 46 and 46 a.
A tuyere fixture 15 that holds the tip of the piston rod 14 and the tuyere 17 arranged along the front-rear direction is attached to the slide frame 50, and the piston rod 14 and the tuyere fixture 15 slide. It is connected linearly through the frame body 50. The slide frame 50 is used as a reinforcing member for avoiding the bending of the piston rod 14 due to the tuyere fixture 15 and the load of the tuyere 17 held by the tuyere fixture 15.
The tip end of the piston rod 14 is connected to the rod connecting portion 52 of the slide frame 50 via the connecting member 51.
The base end portion (that is, the base end side) of the piston rod 14 protruding from the rear portion of the slide frame 50 is fixed to a holding member 53 that houses the air hammer 16, and the air hammer 16 passes through the holding member 53. The piston rod 14 is connected to the base end portion.

A support plate 54 disposed along the front-rear direction is fixed to the cylinder mounting portion 45a of the cylinder support frame 22, and guide rails 55, 55a are disposed on the upper surface of the support plate 54 with a space left and right. Is fixed.
The holding member 53 is attached to the guide rails 55 and 55a so as to be able to advance and retract, and the guide rails 55 and 55a are disposed along the piston rod 14 (that is, parallel to the piston rod 14). For this reason, the holding material 53 can move back and forth along the axial direction of the piston rod 14 together with the piston rod 14.

The air hammer 16 is provided at a position where the air hammer 16, the hydraulic cylinder 13, and the tuyere fixture 15 are arranged in a straight line.
Since the cylinder support frame 22, the support plate 54, and the guide rails 55 and 55a are integrated and tilted together with the support frame 12, the tuyere fixture 15, the hydraulic cylinder 13 and the air hammer 16 arranged in a straight line are arranged. The direction is changed by tilting the support frame 12.

The tuyere fixture 15 includes a hooking rod 57 in which a hook-like portion 56 that can be hooked at the tip of the tuyere 17, a movable block 58 that presses the base end of the tuyere 17, and a movable block 58. Are provided with hydraulic cylinders 59 and 59a.
The latch rod 57 is fixed to the other side (front side) of the base metal member 60, one side (rear side) of which is connected to the slide frame 50. The axis of the latch rod 57 is the axis of the piston rod 14. It is parallel to.
The hydraulic cylinders 59 and 59a are arranged on the left and right sides of the base metal member 60, and are operated by an operation signal from the control unit 29 to move the movable block 58 forward and backward.
As shown in FIG. 2, the movable block 58 is longer than the diameter of the through hole 17 a formed inside the tuyere 17, and the left and right sides are in contact with the tuyere 17 to bring the tuyere 17 forward. Can be pressed.

The tuyere 17 is fixed to the latching rod 57 by pressing the base end portion by the movable block 58 in a state where the hook-like portion 56 of the latching rod 57 is latched at the tip. When fixing the tuyere 17 to the latching rod 57, the latching rod 57 is inserted into the through hole 17a of the tuyere 17 as shown in FIG. Protrude from. At this time, the movable block 58 is in the retracted position, and a space longer than the length of the tip end portion and the base end portion of the tuyere 17 is secured between the movable block 58 and the hook-like portion 56 of the latching rod 57.
Then, the latching rod 57 is retracted together with the piston rod 14 by the operation of the hydraulic cylinder 13, and the hook-like portion 56 of the latching rod 57 is latched to the tip of the tuyere 17. Next, as shown in FIG. 4B, the hydraulic cylinders 59 and 59a move the movable block 58 forward until the movable block 58 is in a state of pressing the proximal end portion of the tuyere 17. Fix to the retaining rod 57.

The holding member 53 is a casing having an upper opening, and is attached to the guide rails 55 and 55a via a slide block 64 as shown in FIG.
The air hammer 16 includes a reciprocating piston 65 and a cylinder tube 66 that houses the piston 65, and an air chamber 68 into which compressed air is injected through an air supply hole 67 is formed on the front side of the cylinder tube 66. .

In general, a reverse hammering type air hammer is used for a device that applies a hammering force in the pulling direction using an air hammer. In the present embodiment, the air hammer 16 is a general-purpose product that is a general hit. The air hammer is used. Specifically, the forward hammering type air hammer is arranged in a direction in which the piston strike direction applies a striking force in the pulling direction to the tuyere fixture 15, that is, in a direction opposite to the normal arrangement.
The reverse blow type air hammer is a special product, which is expensive and significantly less in circulation than the normal blow type air hammer. Therefore, adopting the forward blow type air hammer reduces the manufacturing cost. In addition, since maintenance parts are enriched, it is excellent in maintainability.

The cylinder tube 66 is connected to the rear portion of the holding member 53. When compressed air is injected into the air chamber 68, the piston 65 retreats vigorously and is struck in the direction of pulling out the tuyere 17 from the large circle 18 against the rear part of the holding material 53 (that is, the striking force against the holding material 53 And advancing by the reaction hit against the rear part of the holding member 53.
Here, hot metal or the like in the blast furnace may adhere to the connection portion between the tuyere 17 and the Daimaru 18 to strengthen the connection between the Daimaru 18 and the tuyere 17. Sometimes the tuyere 17 cannot be removed.
For this reason, when the tuyere 17 fixed to the Daimaru 18 is removed, the tuyere 17 fixed to the retaining rod 57 (that is, held by the tuyere fixture 15) is pulled out from the hydraulic cylinder 13 in the pulling direction. In addition to applying force, the air hammer 16 provides striking force in the pulling direction.

The rear portion of the holding member 53 is mainly formed by a bolt 70 to which the piston 65 is driven and a block member 71 into which the bolt 70 is screwed. The bolt 70 is fixed to the block member 71 by a nut 72. The axis of the bolt 70 is along the direction in which the piston 65 is struck, and is in a direction in which deformation due to the striking of the piston 65 is suppressed.
An air discharge hole 73 is formed on the rear side of the cylinder tube 66.

In addition, tension rods 75 and 75a that advance and retreat by actuation of hydraulic cylinders 74 and 74a, which are examples of actuators, are provided on the front side of the cylinder support frame 22 (that is, the support frame 12).
Support plates 76 and 76a are fixed to the left and right sides of the front side of the cylinder support frame 22, respectively. The hydraulic cylinder 74 and the tension rod 75 are mounted on the support plate 76, and the hydraulic cylinder 74a and the tension rod 75a are mounted on the support plate 76a. The tension rods 75 and 75a are disposed on the left and right of the piston rod 14, respectively. ing.
The tension rod 75 (the same applies to the tension rod 75a) is attached to the support plate 76 via the guide member 77 so as to be able to advance and retract, and is connected to the hydraulic cylinder 74 so as to advance and retract in parallel to the piston rod 14. The hydraulic cylinder 74 (the same applies to the hydraulic cylinder 74a) receives the operation signal from the control unit 29 and advances and retracts the tension rod 75, and receives the stop signal from the control unit 29 and fixes the tension rod 75 at a predetermined advance and retreat position.

When removing the tuyere 17 from the Daimaru 18, a force opposite to the pulling direction of the tuyere 17 is applied to the retaining rod 57 due to the law of action and reaction. Otherwise, the self-propelled carriage 11 may fall.
Therefore, when the tuyere 17 is removed from the Daimaru 18, before the air hammer 16 and the hydraulic cylinder 13 are operated, the hydraulic cylinder 74 (the same applies to the hydraulic cylinder 74 a) causes the thrust rod 75 to be removed from the blast furnace by a signal from the control unit 29. The forward end of the propulsion rod 75 is brought into contact with the furnace wall 20 (annular fitting 21 in the present embodiment) to prevent the self-propelled carriage 11 from falling over. In the present embodiment, the advancing / retreating position of the tension rod 75 is fixed in a state where the tip is in contact with the annular fitting 21.

A guide plate 78 for positioning the tension rod 75 that contacts the annular metal fitting 21 is fixed to the tension rod 75 (the same applies to the tension rod 75a). The guide plate 78 is bent inward (in the direction in which the piston rod 14 is present) in front of the tension rod 75, and the tension rod 75 accommodates the portion where the guide plate 78 is in front of the tension rod 75 in the annular fitting 21. Thus, the tip can be brought into contact with the annular metal fitting 21.
Note that the actuator for moving the tension rods 75 and 75a back and forth is not limited to the hydraulic cylinder, and may include, for example, a ball screw connected to the tension rods 75 and 75a and a servo motor that drives the ball screw.

Further, as shown in FIG. 1, a plurality of fixing brackets 79 for positioning the self-propelled carriage 11 with respect to the Daimaru 18 are attached to the furnace wall 20 of the blast furnace as shown in FIG. 1. Yes.
Each fixing bracket 79 is arranged at a specific position with respect to each Daimaru 18.
The base frame 23 of the self-propelled carriage 11 is provided with a clamp 80 on the front side so as to be rotatable. The self-propelled carriage 11 receives an operation signal from the control unit 29 and rotates the clamp 80 to be hooked on the fixing bracket 79. Stop.
The clamp 80 is hooked on the fixing bracket 79, thereby fixing the self-propelled carriage 11 to the furnace wall 20 of the blast furnace and positioning the self-propelled carriage 11 with respect to the Daimaru 18. Therefore, when the first tuyere 17 is replaced, the inclination of the support gantry 12 is recorded, so that the recorded tilt of the support gantry 12 is recorded in the replacement work of the second tuyere 17 or later. The tuyere 17 can be replaced simply by reproducing and fine-tuning, and the replacement work can be performed efficiently.

The tuyere is tilted forward and attached to the Daimaru, and the tilt angle differs depending on the blast furnace. For example, the tuyere is attached to the Daimaru at an angle of 3 degrees in a certain blast furnace, and is attached to the Daimaru at an angle of 7 degrees in a different blast furnace.
Therefore, it is necessary to change the inclination angle of the support frame 12 depending on the blast furnace performing the tuyere replacement operation, and the inclination of the support frame 12 when the tuyere is replaced for each blast furnace is recorded.

A spacer fitting 81 for tilting the tuyere 17 at a predetermined angle with respect to the retaining rod 57 can be attached to the retaining rod 57 as shown in FIGS. The spacer fitting 81 can be fixed to the latching rod 57 by placing it at a predetermined position of the latching rod 57, and a tool or the like is not required for attachment to and removal from the latching rod 57.
The spacer fitting 81 is attached to the retaining rod 57 when the tuyere 17 before being attached to the large circle 18 is fixed to the retaining rod 57. The hydraulic cylinders 59, 59 a receive an operation signal from the control unit 29, press the movable block 58 against the tuyere 17 attached to the retaining rod 57 at a predetermined angle by the spacer fitting 81, and the retaining rod 57 The tuyere 17 is fixed to.

Spacer fittings with different heights are used according to the mounting angle of the tuyere to the Daimaru. The higher the tilting angle of the tuyere attached to the Daimaru, the higher the spacer fitting is used. Increase the tuyere's inclination to 57.
When the tuyere 17 fixed to the large circle 18 is fixed to the retaining rod 57, the spacer fitting 81 is not attached to the retaining rod 57. This is because the hooking rod 57 can be inclined and arranged with respect to the tuyere 17 fixed to the large circle 18 without using the spacer fitting 81.
Further, the orientation of the tuyere fixture 15, the hydraulic cylinder 13, and the air hammer 16 arranged in a straight line is changed according to the orientation of the through hole 17 a of the tuyere 17 attached to the Daimaru 18.

Next, a method for replacing the tuyere 17 will be described.
(1) As shown in FIG. 6, the blow-type tuyere replacement machine 10 moves the vertical bars 30, 30 a along the vertical direction without tilting the support frame 12 (perpendicular to the self-propelled carriage 11). ) In the state of being placed, the furnace wall 20 is approached and the clamp 80 is hooked on the fixing bracket 79. FIG. 6 illustrates a state in which the hydraulic cylinder 39 has lowered the piston rod 40 to the lowest. The blow-type tuyere replacement machine 10 fixes the piston rod 40 at a predetermined height position to the furnace. You may approach the wall 20.
(2) The hydraulic cylinders 39 and 49 are actuated to adjust the height and left / right position of the latching rod 57, and the hydraulic cylinder 27 is actuated to adjust the inclination of the latching rod 57 so that the latching rod 57 is The axial center of the tuyere 17 fixed to 18 is arranged at an extended position. At this time, the retaining rod 57 may be arranged so as to be inserted from the proximal end side of the tuyere 17 and come out from the distal end side of the tuyere 17 as the hook-like portion 56 moves forward along the piston rod 14. It may be slightly deviated from the position where the axis of the mouth 17 is extended.
The position and orientation of the latching rod 57 after adjustment are recorded when the first tuyere 17 is removed, and in the removal of the second tuyere 17 and thereafter, the recorded position and orientation are recorded. Fine adjustment is performed after the latch rod 57 is set.

(3) The hydraulic cylinder 13 is actuated to advance the latching rod 57 and insert it into the through hole 17a of the tuyere 17 so that the hook-like portion 56 of the latching rod 57 protrudes from the tip side of the tuyere 17. At this time, the movable block 58 is disposed in the retracted position.
(4) The hydraulic cylinder 39 is operated, and the latch rod 57 together with the cylinder support frame 22 and the like until the latch rod 57 contacts the inner peripheral surface of the tuyere 17 as shown in FIG. To raise.
(5) The hydraulic cylinder 13 is operated to retract the latch rod 57 until the hook-like portion 56 of the latch rod 57 hits the tip of the tuyere 17.

(6) By operating the hydraulic cylinders 59 and 59a, the movable block 58 is moved forward and brought into contact with the proximal end portion of the tuyere 17, and the tuyere 17 is held by the hook-like portion 56 of the latching rod 57 and the movable block 58. To do. At this time, the latching rod 57 is inserted into the through hole 17a of the tuyere 17.
(7) The hydraulic cylinders 74 and 74a are operated, and the operating tension rods 75 and 75a are moved forward to contact the furnace wall 20.
(8) While operating the hydraulic cylinder 13 and applying a pulling direction force to the tuyere 17, the air hammer 16 is actuated to apply a striking force to the tuyere 17, and the tuyere 17 is removed from the Daimaru 18. After the tuyere 17 is removed from the Daimaru 18, the air hammer 16 is stopped.

(9) The operation of the hydraulic cylinder 13 is continued until the piston rod 14 is disposed at the most retracted position, and the tuyere 17 is retracted.
(10) The clamp 80 is removed from the fixing bracket 79, the self-propelled carriage 11 is caused to travel, and the percussion tuyere replacement machine 10 is retracted.
(11) The movable block 58 is moved backward, and the tuyere 17 is extracted from the retaining rod 57.

(12) After attaching the spacer metal fitting 81 to the latching rod 57 and attaching a new tuyere to the latching rod 57, the movable block 58 is brought into contact with the base end of the tuyere to fix the tuyere.
(13) As the self-propelled carriage 11 travels, the blow-type tuyere replacement machine 10 is brought close to the furnace wall 20 and the clamp 80 is hooked on the fixing bracket 79.
(14) The tilt of the support frame 12, the position of the cylinder support frame 22 in the left-right direction with respect to the support frame 12, and the height of the pedestal 37 so that the axis of the tuyere is arranged along the axis of the Daimaru 18 Adjust the position.
(15) Actuate the hydraulic cylinder 13, advance the tuyere together with the retaining rod 57, and attach the tuyere to the Daimaru 18.
(16) The movable block 58 is moved backward to release the fixed tuyere of the movable block 58 and the hook-like portion 56 of the retaining rod 57, the retaining rod 57 is removed from the tuyere, and the tuyere replacement work is completed. To do.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and all changes in conditions and the like that do not depart from the gist are within the scope of the present invention.
For example, the tension rod can be attached to the support frame via the support member instead of being attached to the support plate fixed to the cylinder support frame.

10: Stroke-type tuyere replacement machine, 11: Self-propelled carriage, 12: Support base, 13: Hydraulic cylinder, 14: Piston rod, 15: Tuyere fixture, 16: Air hammer, 17: Tuyere, 17a: Through Hole: 18: Daimaru, 20: Furnace wall, 21: Ring metal fitting, 22: Cylinder support frame, 23: Base frame, 24: Caterpillar, 25, 25a: Horizontal pin, 26: Horizontal shaft, 27: Hydraulic cylinder (tilting Hydraulic cylinder), 28: bearing, 29: control unit, 29a: operation panel, 30, 30a: bar material, 31: horizontal support material, 32: link material, 33: cylinder rod, 34, 34a: guide rail, 35: slide block, 36: portal frame, 37: pedestal, 38: reinforcement, 39: hydraulic cylinder, 40: piston rod, 41: front guide rail, 42: rear guide rail, 43: front slide Lock, 44: Rear slide block, 45, 45a: Cylinder mounting portion, 46, 46a: Guide plate, 47, 48: Reinforcement plate, 49: Hydraulic cylinder, 50: Slide frame, 51: Connecting member, 52: Rod connection Part, 53: holding material, 54: support plate, 55, 55a: guide rail, 56: hook-shaped part, 57: latching rod, 58: movable block, 59, 59a: hydraulic cylinder, 60: base metal material, 64 : Slide block, 65: Piston, 66: Cylinder tube, 67: Air supply hole, 68: Air chamber, 70: Bolt, 71: Block material, 72: Nut, 73: Air discharge hole, 74, 74a: Hydraulic cylinder, 75, 75a: Strut rod, 76, 76a: Support plate, 77: Guide member, 78: Guide plate, 79: Fixing bracket, 80: Clamp, 8 : Spacer brackets

Claims (6)

A self-propelled carriage, a biaxial hydraulic cylinder attached to the self-propelled carriage via a support base, a tuyere fixture connected to a tip end side of a piston rod of the hydraulic cylinder, and a base of the piston rod An air hammer which is connected to the end side and applies an impact force in the pulling direction to the tuyere fixture, and holds the tuyere in which the through hole is formed with the tuyere fixture inserted in the through hole. In the blow-type tuyere replacement machine that attaches and detaches the tuyere to the Daimaru attached to a predetermined position of the blast furnace,
The support frame is tilted about a horizontal pin horizontally mounted on the self-propelled carriage, and the orientation of the tuyere fixture, the hydraulic cylinder, and the air hammer arranged in a straight line is attached to the Daimaru. Changed according to the direction of the through hole of the tuyere,
The base end side of the piston rod is fixed to a holding material that houses the air hammer, and the piston that the air hammer reciprocates in the direction in which the tuyere is pulled out of the large circle against the holding material, A blow-type tuyere replacement machine that removes the fixed tuyere. 2. The striking tuyere replacement machine according to claim 1, wherein the holding member is attached to a guide rail tilting together with the support frame so as to be able to advance and retreat, and the guide rail is arranged in parallel to the piston rod. A blow-type tuyere replacement machine characterized by that. The striking-type tuyere replacement machine according to claim 1 or 2, further comprising a tension rod that moves forward and backward by the operation of an actuator on the front side of the support frame, and when removing the tuyere from the Daimaru, the tension rod is A blow-type tuyere replacement machine that contacts a furnace wall of a blast furnace to prevent the self-propelled carriage from overturning. 4. The striking type tuyere replacement machine according to claim 3, wherein the strut rods are respectively arranged on the left and right sides of the piston rod, and the strut rods advance and retreat in parallel with the piston rod. A tuyere replacement machine. 5. The percussion tuyere replacement machine according to any one of claims 1 to 4, wherein the self-propelled carriage is attached with a tilting hydraulic cylinder for tilting the support frame at a predetermined angle. A blow-type tuyere replacement machine. The blow-type tuyere replacement machine according to any one of claims 1 to 5, wherein the self-propelled carriage is provided with a clamp, and the clamp fixes the self-propelled carriage to a furnace wall of the blast furnace. The self-propelled carriage is positioned with respect to the Daimaru.

Images