JP3766452B2 - Blow pipe replacement machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blow pipe replacement machine, and more particularly to a blow pipe replacement machine capable of improving workability of work for replacing a blow pipe, shortening work time, and improving safety.
[0002]
[Prior art]
A tuyere that blows hot air into the furnace is installed at the bottom of the blast furnace. Hot air from the annular pipe around the furnace body is blown into the tuyere through the blow pipe, but this blow pipe is periodically replaced due to deterioration of the material.
As a conventional blowpipe replacement machine, for example, “a tuyere connection pipe replacement device” disclosed in JP-A-6-108130 is known.
This device suspends and supports the traveling frame on a rail provided on the annular pipe, supports the swivel frame on the traveling frame, and a series of hooking projections protruding from the tuyere connection pipe consisting of the blow pipe and the lower vent pipe A fork to be hooked, a tightening machine that can tighten and loosen a fastening device for a blow pipe and a lower vent pipe, and an engagement / disengagement machine that can engage and disengage this fastening device are attached to a swivel base. During operation, these forks, squeezers and detachers run along the annular pipe, and if necessary, turn the tuyere connection pipe by turning it as necessary, making it easy to center each tuyere. It can be made compact without interfering with surrounding facilities.
[0003]
[Problems to be solved by the invention]
However, in the conventional blow pipe replacement machine, since the annular traveling path structure such as a rail or a traveling frame must be installed on the annular pipe in this way, the equipment cost increases and the tuyere connection pipe (blowing connection pipe (blow) (Pipe) transport range is limited, it cannot be transported to the entire floor, and when replacing the tuyere connection pipe, a complicated movement is required, but it cannot be replaced with a small turn. there were.
In addition, the hook projection of the tuyere connection pipe was supported by a fork, and the fork was replaced by simply moving the fork horizontally up and down and horizontally. It is difficult to operate each device that attaches and detaches the upper hot air intake part that is attached to the tube, and it takes time and labor.In addition, each attachment part is damaged, and the operator approaches each attachment part more frequently. As a result, it was necessary to check the work situation, so there was a problem in safety.
[0004]
Furthermore, when replacing the blow pipe, the base part is fixed to the mounting base of the fastening member of the blast furnace, and the fastening part is detachably connected to the mounting bracket suspended from the rear partial pipe of the blow pipe It is necessary to loosen the deployed turnbuckle by rotating it.
However, since the height from the floor to the blow pipe is less than 1 m, the worker has to turn under the blow pipe and turn the handle of the turnbuckle under a high temperature environment. It was dangerous and hard work.
[0005]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a blow pipe replacement machine capable of improving workability of blow pipe replacement work, shortening work time, and improving safety. And
[0006]
[Means for Solving the Problems]
The blow pipe replacement machine according to claim 1, wherein the blow pipe replacement machine according to claim 1 has a hot air blowing part at a tip part detachably attached to a tuyere of a blast furnace, and a branch pipe extending from an annular pipe around the furnace body at an upper part of the base part. In the blow pipe replacement machine that replaces the blow pipe with the hot air intake part that can be mounted on the front pipe, a front trunnion and a rear trunnion are protruded from the blow pipe, and a swing table is mounted on the movable carriage as the main body. The swing table includes a front hooking portion that can be hooked on the front trunnion, and at least a front arm that can pivot the front hooking portion in a vertical direction, and a front hooking portion. A rear arm that has a front pivoting means, a rear latching part that can be latched on the rear trunnion, and at least the rear latching part pivotable in the vertical direction; and the rear latching part And a rear rotating means.
According to a second aspect of the present invention, in the blow pipe replacement machine according to the first aspect, a cart fixed point turning means is provided in the movable carriage.
[0007]
[0008]
[Action]
In the blow pipe replacement machine according to claim 1, the front, the front of the rear arm, and the rear hooking portion are roughly arranged at the hooking positions of the front and rear trunnions of the corresponding blow pipe by the movable carriage. At the same time, the respective latching positions are finely adjusted using the swing table, and then the front latching unit is latched on the front trunnion by the front pivoting unit, and the rear arm is pivoted upward by the rear pivoting unit. When the front end of the blow pipe pivots downward about the front trunnion supported by the front latching part and conversely the rear arm pivots downward, the front end of the blow pipe moves upward about the front trunnion. Rotate. Blow pipe rotation operation in the vertical direction by the rear rotation means, the blow pipe vertical rotation operation in the vertical direction by the front rotation means, the swing table swing operation, and movement if necessary By moving the carriage, the hot air blowing part of the blow pipe is attached to and detached from the tuyere of the blast furnace, and the hot air intake part is attached to and detached from the branch pipe of the annular pipe, improving workability of blow pipe replacement work and reducing work time. Shortening and improvement of safety can be achieved.
In the blow pipe replacement machine according to claim 2, if the moving carriage is turned around a specific fixed point by using the carriage fixed point turning means when necessary, the workability of the blow pipe replacement work is further improved. To do.
[0009]
[0010]
【The invention's effect】
The blow pipe replacement machine according to claim 1 or 2, wherein the blow pipe is pivoted in the vertical direction around the rear trunnion by the rear pivot means, and the front trunnion by the front pivot means is the center. The blowpipe hot air blowing part is attached to and detached from the blast furnace tuyere while appropriately selecting the vertical rotation of the blow pipe, the horizontal swing of the swing table, and the movement of the moving carriage, and the hot air intake part is Since the annular pipe is attached to and detached from the branch pipe, the workability of the blow pipe replacement work can be improved, the work time can be shortened, and the safety can be improved.
In particular, in the blow pipe replacement machine according to claim 2, since the moving carriage can be turned around a specific fixed point by the carriage fixed point turning means as required, the workability of the blow pipe replacement work is further improved. In addition, it is possible to improve the transportability by turning with a small turn.
[0011]
[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. Here, the insertion / removal direction of the blow pipe is defined as the X direction, the direction orthogonal thereto is defined as the Y direction, and the vertical direction is defined as the Z direction.
1 is a perspective view of the blow pipe replacement machine according to the first embodiment of the present invention, FIG. 2 is a side view showing a state before the blow pipe replacement is started, and FIG. 3 is the start of the blow pipe replacement. FIG. 4 is a side view showing a state during extraction of the blow pipe, FIG. 5 is a side view showing a state after extraction of the blow pipe, and FIG. 6 is a second embodiment of the present invention. Fig. 7 is an enlarged side view showing the usage state of the fastening member used in the blow pipe replacement machine according to Fig. 7, Fig. 7 is an enlarged plan view of the main part showing the usage state of the fastening member, and Fig. 8 is an enlarged front view of the loosening means. 9 is a sectional view taken along line S9-S9 in FIG.
[0013]
First, based on FIGS. 1-5, the blowpipe replacement machine which concerns on the 1st Embodiment of this invention is demonstrated.
As shown in FIG. 2, the blow pipe replacement machine 10 according to the first embodiment of the present invention includes a tuyere 12 of a blast furnace 11, a branch pipe 13 extending from an annular pipe arranged around the furnace body, and This is a device for replacing the blow pipe 14 connected between the two.
The tuyere 12 is connected to the tip of the Daimaru 16 connected to the back of the tuyere metal 15 attached to the through hole of the blast furnace 11, and the blow pipe 14 has a hot air blowing part 17a at the tip. A front partial pipe 17 that is detachably attached to the tuyere 12 and a hot air intake 18a that is bolted to the base of the front partial pipe 17 and can be attached to the expansion 13a at the tip of the branch pipe 13 of the annular pipe. And a rear partial pipe 18 provided at the top. Further, a front trunnion 17 b projects from both sides of the base part of the front partial pipe 17, and a rear trunnion 18 b projects from both sides of the base part of the rear partial pipe 18.
[0014]
As shown in FIGS. 1 to 3, the blow pipe replacement machine 10 has a self-propelled movable carriage 19, and a cyclowheel 21 with a steering function having a traveling motor 20 a on each side of the front end portion is attached, Wheels 22 are attached to both sides of the rear end. In addition, by turning the rod of the short hydraulic cylinder 110 into and out of the central portion near the rear end of the movable carriage 19, the lateral turning roller 111 can be taken in and out below the height of the ground contact surface of the wheel 22 of the movable carriage 19. A dolly fixed point turning means 112 is provided.
A rocking table 20 that can move in the XY directions is mounted on the rear part of the movable carriage 19.
The swing table 20 is disposed on the swivel table 24 that is swung by a swivel roller 23 that is rotated by a swirl motor (not shown), and a Y hydraulic pressure disposed between the pair of Y linear guides 25. A Y table 27 that moves when the rod of the cylinder 26 moves in and out, and an X table 30 that is arranged on the Y table 27 and moves when the rod of the X hydraulic cylinder 29 disposed between the pair of X linear guides 28 moves in and out. I have.
[0015]
On the X table 30 of the swing table 20, a pair of support columns 31 are erected, and a rotating shaft 32 is horizontally mounted between the support columns 31. A relatively long front arm 33 whose tip reaches the front trunnion 17b when the blow pipe is replaced is fixed to both ends of the rotation shaft 32, and the front end of the rear trunnion 18b when the blow pipe is replaced is fixed to each inner side. A relatively short rear arm 34 reaching up to is pivotally supported.
A front hook 35, which is an example of a front hooking portion that can be hooked on the front trunnion 17 b, is provided at the tip of the front arm 33 via a pin 36 so as to be rotatable in the vertical direction. By moving a rod of a front hydraulic cylinder 37, which is an example of a front rotation means attached to the lower portion of the front end portion of the front arm 33, the front hook 35 rotates vertically around the pin 36, and is moved to the front trunnion 17b. It will be hooked.
A rear hook 38, which is an example of a rear hooking portion, is formed at the tip of the rear arm 34, and a connecting rod 39 is laid across the vicinity of the base portion of both rear arms 34. When a rod of a hydraulic cylinder 40, which is an example of a rear rotation means that is pivotally mounted on the X table 30 so as to be vertically pivotable, is taken in and out, via a connecting rod 39 on which the tip of the rod is pivotally attached, The rear arm 34 rotates in the vertical direction around the rotation shaft 32.
1 and 2, reference numeral 100 denotes a fastening member with a turnbuckle for connecting and fixing the blast furnace 11 and the blow pipe 14, reference numeral 101 denotes a fastening member with a turnbuckle for connecting and fixing the blast furnace 11 and the branch pipe 13, and reference numeral 102. Is a viewing window, reference numeral 103 is a hanging hook, reference numeral 104 is a hydraulic unit, reference numeral 105 is a battery, and reference numeral 106 is a control unit.
[0016]
Then, operation | movement of the blow pipe replacement machine 10 which concerns on the 1st Embodiment of this invention is demonstrated.
2 and 3, when the blow pipe is pulled out, the blow pipe replacement machine 10 is disposed substantially opposite to the blow pipe 14 as shown in FIGS. 2 and 3, and then the cyclowheel 21 is rolled by the travel motor 20a as shown in FIG. The swing table 20 is disposed below the blow pipe 14. As a result, the front, the front arms 33 and 34, and the rear hooks 35 and 38 are roughly arranged at the hooking positions of the corresponding front and rear trunnions 17b and 18b. Thereafter, the turning table 24, the X table 30, and the Y table 27 of the swing table 20 are moved in each direction to finely adjust the respective latching positions.
Next, the front and rear trunnions 17b and 18b are hooked to the front and rear hooks 35 and 38 by projecting the rods of the front hydraulic cylinder 37 and the hydraulic cylinder 40 by a predetermined amount, and the blow pipe 14 is moved to the front and rear arms 33. , 34 is supported downward.
[0017]
Then, when the fastening member 100 that fastens the blast furnace 11 and the blow pipe 14 is removed and then the rod of the hydraulic cylinder 40 is further protruded and the rear arm 34 is rotated upward, the base portion of the blow pipe 14 is lifted. When the front end of the blow pipe 14 rotates downward about the front trunnion 17b supported by the front hook 35 and the rod of the hydraulic cylinder 40 is retracted, the front end of the blow pipe 14 is opposed to the front trunnion. It rotates upward about 17b. By performing these rod operations in a timely manner with the swivel table 24 and the Y table 27 in the free state and moving the X table 30 rearward, the hot air blowing section 17a of the blow pipe 14 becomes the tuyere 12 as shown in FIG. And the hot air intake 18 a is detached from the branch pipe 13.
[0018]
At this time, a large load is applied to the connecting portion between the branch pipe 13 and the hot air intake portion 18a. However, the expansion 13a at the tip of the branch pipe 13 contracts as the base part of the blow pipe 14 is pulled up. The connecting part will not be broken.
Thereafter, the pulled blow pipe 14 causes the rod 22 of the hydraulic cylinder 110 of the carriage fixed point turning means 112 to protrude and the turning roller 111 to protrude downward to float the wheel 22, and the turning roller 111 makes a small turn of the movable carriage 19. It turns effectively, and is conveyed to the replacement stage of the blow pipe 14.
Note that the work of attaching the blow pipe 14 to the blast furnace 11 side is performed in the opposite direction of these work steps.
In this way, the hot air blowing portion 17a of the blow pipe 14 is attached to and detached from the tuyere 12, and the hot air intake portion 18a is attached to and detached from the branch pipe 13 of the annular tube, so that the workability of the replacement work of the blow pipe 14 is improved. Work time can be shortened and safety can be improved.
Further, by turning the movable carriage 19 using the carriage fixed point turning means 112, the blow pipe 14 with a small turn can be conveyed.
[0019]
Next, based on FIGS. 6-9, the blowpipe replacement machine which concerns on the 2nd Embodiment of this invention is demonstrated.
As shown in FIGS. 6 and 7, the blow pipe replacement machine 50 according to the second embodiment is an example of an elastic member that acts on the fastening side with respect to the fastening member 100 between the blast furnace 11 and the fastening member 100. The tightening / loosening means 52 with the spring 51 is provided, and the tightening / loosening means 53 of the tightening / loosening means 52 is taken in and out of the tightening means 52 from the outside. The tightening work is possible. Hereinafter, the blow pipe replacement machine 50 will be described in detail. First, the loosening means 52 will be described.
On the peripheral side surface of the bottom portion of the blast furnace 11, a container-like mounting base 54 serving as a connecting part on the blast furnace 11 side of the fastening member 100 is detachably bolted, and at the center of the end surface of the mounting base 54, A square through hole 54a is formed. A rectangular base portion 57 of the fastening member 100 is inserted into the through-hole 54 a from the outside, and a thick disc-shaped contact plate 55 is fixed near the tip of the base portion 57. The coiled spring 51 is housed between the abutting plate 55 and the end surface of the mounting base 54 in a state of being inserted into the base portion 57, and the blast furnace 11 and the blow pipe 14 are energized by the urging force of the spring 51. The blow pipe 14 is firmly fastened to the blast furnace 11 by drawing the fastening member 100 having no flexibility in the length direction interposed between the blast furnace 11 and the blast furnace 11.
[0020]
A pair of abutment protrusions 56A of the loosening means 53 whose tip surface faces the fastening member 100 side is fixed to a position opposed to the peripheral side surface on the tip side of the mounting base 54 (see also FIG. 9), and these correspond to these. The contact protrusions 56 </ b> B on the fastening member 100 side protrude from both side surfaces on the blast furnace 11 side of the joint member 58 serving as the main body of the universal joint provided on the fastening member 100. The contact protrusion 56B has a receiving plate 56a at the bottom.
Here, the structure of the fastening member 100, which is originally a ready-made product, will be schematically described in order from the base portion 57 side. The end portion of the base portion 57 is pivotally attached to the blast furnace 11 side of the joint member 58 via a pin 59. The bolt 61a on one end side of the turnbuckle 61 provided in the fastening member 100 is pivotally attached to the joint member 58 on the blow pipe 14 side via the pin 60. A relatively long bolt 61b on the other end side of the turnbuckle 61 has an arcuate contact surface on a downward U-shaped notch 62a extending from a lower portion of the rear partial pipe 18 of the blow pipe 14 and a downward U-shape. It is fastened through a washer 63 and a nut 64. When the operator rotates the handle 61c, the bolts 61a and 61b are moved toward or away from each other, and the length of the fastening member 100 is adjusted. However, the present invention eliminates such manual length adjustment. Next, the loosening means 53 will be described in detail with reference to FIGS. Note that the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
[0021]
As shown in FIGS. 6 to 9, the loosening means 53 has a generally C-shaped plate-like grip 66 in which a gripping hole 65 for a handle is formed at the center portion, and the bifurcated portion of the grip 66. A base portion of a small hydraulic cylinder 68 serving as a drive source is bolted to the tip portion of the shape via a cylinder base 67 arranged on the back surface. A contact cap 69 is attached to the tip of the rod 68 a of the hydraulic cylinder 68. In addition, oil is supplied to each hydraulic cylinder 68 via hydraulic pipes 70A and 70B, and the hydraulic pipe 70A having one bent end is fixed to the vicinity of the grip hole 65 of the grip 66 and is externally connected. It extends to. Of course, the hydraulic pipes 70A and 70B and a hydraulic source (not shown) are connected by a flexible pipe.
[0022]
Next, operation | movement of the blow pipe replacement machine 50 which concerns on the 2nd Embodiment of this invention is demonstrated.
As shown in FIGS. 6 to 8, when the blow pipe is pulled out, the operator grasps the grip 66 and moves the loosening means 53 between the contact protrusion 56 </ b> A on the mounting base 54 side and the contact protrusion 56 </ b> B on the fastening member 100 side. Insert between. At this time, the left and right cylinder bases 67 are opposed to the surfaces of the corresponding contact protrusions 56A, while the tip portions of the hydraulic cylinders 68 are placed on the receiving plates 56a of the contact protrusions 56B.
Next, when the rod 68a of the hydraulic cylinder 68 is protruded in this state, the contact cap 69 contacts the contact projection 56B, and then resists the biasing force of the spring 51 with the contact projection 56A side as a fulcrum. Then, the abutting protrusion 56B is pushed outward. As a result, the fastening member 100 extends, and the operator can easily and easily loosen the fastening member 100 in a short time without having to dive under the narrow blow pipe 14 for a long time and turn the handle 61c of the turnbuckle 61.
[0023]
When the blow pipe is attached, after the blow pipe 14 is attached to the tuyere 12, the fastening member 100 extended by the loosening means 53 is again passed between the blast furnace 11 and the blow pipe 14, and then the hydraulic pressure of the loosening means 53 is reached. When the rod 68a of the cylinder 68 is retracted, the fastening member 100 is contracted by the urging force of the spring 51, and the blow pipe 14 is firmly fastened to the blast furnace 11. Thereby, the fastening member 100 can be fastened easily and within a short time.
As described above, since the portable means is used as the loosening means 53, the loosening means 53 can be easily brought to the work site when the blow pipe 14 is attached to or removed from the tuyere 12, and the grip 66 is held and loosened. The means 53 can be easily put in and out of the tightening means 52.
Further, since the hydraulic cylinder 68 is employed as the drive source, the hand-held loosening means 53 can be designed to be relatively light and compact.
Further, as the tightening / loosening means 52, the spring 51 is housed in the mounting base 54 of the blast furnace 11 and the contact protrusions 56A and 56B of the hydraulic cylinder 68 are provided on the peripheral side surfaces of the mounting base 54 and the fastening member 100 is adopted. Therefore, the existing blow pipe installation specification of the blast furnace 11 can be easily changed to a specification applicable to the blow pipe replacement machine 50 of the present invention.
[0024]
Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and design changes and the like within a range not departing from the gist are also included in the present invention.
For example, the projecting positions of the front and rear trunnions in the blow pipe are not limited to the embodiment, but may be provided at any position of the blow pipe as long as the front trunnion is the front and the rear trunnion is the rear. .
In the embodiment, as the swing table, a table having a horizontal movement function and a horizontal turning function is employed, but the present invention is not limited to this, and a table provided with a lifting function may be employed.
Further, in the embodiment, as the rear side rotation means, one that vertically rotates the entire rear arm is adopted. However, the present invention is not limited to this. For example, only the rear side latching portion is vertically rotated. A part of the arm may be rotated. In addition, as the front side rotating means, one that vertically rotates only the front side latching portion is adopted, but the whole front arm or a part of the arm may be rotated.
[0025]
In the embodiment, the hydraulic cylinders are employed as the front and rear rotating means, but the present invention is not limited to this, and other driving means such as an electric jack may be used.
In the embodiment, the front rotation means for rotating the front hooking portion of the front arm in the vertical direction is provided. However, the present invention is not limited to this, but the front rotation means is omitted in the present invention. included.
In the embodiment, the carriage fixed point turning means is provided in the moving carriage, but this means is not necessarily provided in the moving carriage.
The order of the work for inserting and removing the blow pipe by the blow pipe replacement machine is not limited to that of the embodiment, and any other order may be used.
[0026]
In the second embodiment, the moving carriage is the same as that of the first embodiment. However, the present invention is not limited to this. For example, a carriage that simply moves a blow pipe placed thereon may be used. Good.
In the second embodiment, a coiled spring is adopted as the elastic member, but the elastic member is not limited to this, and may be another elastic member such as a leaf spring or a rubber spring.
The tightening means and the loosening means in the second embodiment need not be limited to those having the structure described in the embodiment. In addition, the drive source of the loosening means is not limited to the hydraulic cylinder, and for example, an electric cylinder, an electric jack or the like may be adopted.
[Brief description of the drawings]
FIG. 1 is a perspective view of a blow pipe replacement machine according to a first embodiment of the present invention.
FIG. 2 is a side view showing a state before the blow pipe replacement is started.
FIG. 3 is a plan view showing a state before the blow pipe replacement is started.
FIG. 4 is a side view showing a state in which the blow pipe is being extracted.
FIG. 5 is a side view showing a state after the blow pipe is removed.
FIG. 6 is an enlarged side view showing a usage state of a fastening member used in a blow pipe replacement machine according to a second embodiment of the present invention.
FIG. 7 is an enlarged plan view of a main part showing a use state of the fastening member.
FIG. 8 is an enlarged front view of the loosening means.
9 is a sectional view taken along line S9-S9 in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Blow pipe replacement machine 11 Blast furnace 12 Tuyere 13 Branch pipe 13a Expansion 14 Blow pipe 15 Tuyere metal 16 Daimaru 17 Front partial pipe 17a Hot air blowing part 17b Front trunnion 18 Rear partial pipe 18a Hot air taking part 18b Rear trunnion DESCRIPTION OF SYMBOLS 19 Moving trolley 20 Oscillating table 20a Traveling motor 21 Cyclic wheel 22 Wheel 23 Turning roller 24 Turning table 25 Y linear guide 26 Y hydraulic cylinder 27 Y table 28 X linear guide 29 X hydraulic cylinder 30 X table 31 Post 32 Rotary shaft 33 Front arm 34 Rear arm 35 Front hook 36 Pin 37 Front hydraulic cylinder 38 Rear hook 39 Connecting rod 40 Hydraulic cylinder 50 Blow pipe replacement machine 51 Spring 52 Tightening means 53 Loosening means 54 Mounting rack 54a Through hole 55 Abutting plate 56A Abutting projection 56B Abutting projection 56a Receiving plate 57 Base portion 58 Joint member 59 Pin 60 Pin 61 Turnbuckle 61a Bolt 61b Bolt 61c Handle 62 Fastening bracket 62a Notch 63 Washer 64 Nut 65 Grasping hole 66 Grip 67 Cylinder base 68 Hydraulic cylinder 68a Rod 69 Contact cap 70A Hydraulic piping 70B Hydraulic piping 100 Fastening member 101 Fastening member 102 Viewing window 103 Hook for suspension 104 Hydraulic unit 105 Battery 106 Control unit 110 Hydraulic cylinder 111 Turning roller 112 Cart Fixed point turning means

Claims (2)

A blow pipe that replaces the blow pipe with a hot air blowing part at the tip detachably attached to the tuyeres of the blast furnace and a hot air intake part that can be attached to a branch pipe extending from the annular pipe around the furnace body at the top of the base part In pipe changer,
A front trunnion and a rear trunnion are projected from the blow pipe, and a swing table is mounted on a movable carriage as a main body. The swing table has a front latching portion that can be latched on the front trunnion. A front arm that can rotate at least in the vertical direction, a front rotation means for the front hook, and a rear hook that can be hooked on the rear trunnion. A blowpipe changer characterized in that at least a rear arm in which the rear hooking portion is rotatable in the vertical direction and a rear rotating means of the rear hooking portion are disposed.   The blow pipe replacement machine according to claim 1, wherein a carriage fixed point turning means is provided on the movable carriage.

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