JPH08283812A - Blow pipe exchanging machine - Google Patents

Abstract

PURPOSE: To provide a blow pipe exchanging machine by which the workability in the exchanging work of a blow pipe is improved, the working time is shortened and the safety is improved. CONSTITUTION: A front side trunnion and a rear side trunnion are projectingly arranged on the blow pipe and a rocking table 20 is mounted on a movable carriage 19 as the main body. In the rocking table 20, a front side locking part 35 capable of being locked to the front side trunnion is provided. Further, the rocking table is provided with a front arm 33 in which at least the front side locking part 35 is turnable in the vertical direction, a front side turning means 37 of the front side locking part 35, a rear arm 34 which has a rear side locking part 38 capable of being locked to the rear side trunnion and in which at least the rear side locking part 38 is turnable in the vertical direction, and a rear side turning means 40 of the rear side locking part 38.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blow pipe replacer, and more particularly to a blow pipe replacer capable of improving the workability of the blow pipe replacement work, shortening the work time, and improving the safety. Regarding replacement machines.

[0002]

2. Description of the Related Art At the bottom of a blast furnace, tuyere for blowing hot air into the furnace is installed. Hot air from the annular pipe around the furnace body is blown into the tuyere via the blow pipe, but this blow pipe is regularly replaced due to deterioration of the material. As a conventional blow pipe replacement machine, for example, a "tuyere connection pipe replacement device" disclosed in Japanese Patent Laid-Open No. 6-108130 is known. This device suspends and supports the traveling platform on the rails provided on the annular pipe, supports the swivel platform on the traveling platform, and makes a series of hook protrusions protruding from the tuyere connecting pipe consisting of the blow pipe and the lower vent pipe. A fork to be hooked, a tightening / releasing device capable of tightening / unfastening the fastening device of the blow pipe / lower vent pipe, and an engaging / disengaging device capable of engaging / disengaging this fastening device are attached to the swivel base. During operation, these forks, tighteners, engagement / disengagement machines can be run along an annular pipe, and can be swung if necessary to pull out the tuyere connecting pipe to facilitate centering for each tuyere. It can be made compact without interfering with the surrounding equipment.

[0003]

However, in the conventional blow pipe changer, since the annular traveling path structure such as the rail and the traveling mount has to be installed on the annular pipe, the equipment cost is high. In addition, the transportation range of the tuyere connecting pipe (blow pipe) is limited, it cannot be transported to the entire floor, and when the tuyere connecting pipe is replaced, complicated movement is required There was a problem that it could not be replaced effectively. In addition, since the replacement was carried out only by supporting the hooking projection of the tuyere connecting pipe with a fork and horizontally moving this fork up and down and moving it in and out horizontally, the hot air blowing part at the tip part attached to the tuyere,
It is difficult to operate each device that attaches and detaches the upper hot air intake part that is attached to the branch pipe, it takes time and labor, and each attachment part is damaged, and the worker diligently attaches to each attachment part. There was also a problem in safety because the work situation had to be checked closely.

Further, when the blow pipe is replaced, the base is fixed to the mounting base of the fastening member of the blast furnace,
A fastening member, the tip of which is detachably connected to a mounting bracket vertically installed on the rear partial pipe of the blow pipe,
It is necessary to rotate and loosen the deployed turnbuckle. However, the height from the floor to the blow pipe is 1 m
Therefore, the worker has to turn the handle of the turnbuckle under the blow pipe in a high temperature environment, which is quite dangerous and hard work.

The present invention has been made in view of the above circumstances, and improves the workability of blow pipe replacement work.
It is an object of the present invention to provide a blow pipe changer capable of shortening work time and improving safety.

[0006]

A method according to the above-mentioned object.
The blow pipe replacement machine described is such that the hot air blowing part at the tip part is detachably attached to the tuyere of the blast furnace, and the hot air intake part that can be attached to the branch pipe extending from the annular pipe around the furnace body is attached to the upper part of the base part. In a blow pipe changer for replacing a blow pipe provided with, a front trunnion and a rear trunnion are provided on the blow pipe in a protruding manner, and a swing table is mounted on a moving carriage serving as a main body. A front arm having a front hooking portion capable of being hooked on the front trunnion, at least the front hooking portion being vertically rotatable, a front rotating means of the front hooking portion, A rear arm having a rear hooking portion that can be hooked on the rear trunnion, at least the rear hooking portion being vertically rotatable, and a rearward rotating means of the rear hooking portion. Are installed. A blow pipe changer according to a second aspect of the present invention is the blow pipe changer according to the first aspect, wherein the movable carriage is provided with bogie fixed point turning means.

According to another aspect of the blow pipe replacement machine, the hot air blowing portion at the tip end is detachably attached to the tuyere of the blast furnace via the fastening member whose length is adjustable, while the upper portion of the base portion is attached. In, in the blow pipe changer equipped with a moving carriage of the blow pipe provided with a hot air intake part that can be mounted on a branch pipe extending from the annular pipe around the furnace body, between the blast furnace and the fastening member, A fastening means having an elastic member acting on the fastening side with respect to the fastening member is provided, and a drive source is provided, and a fastening means for the fastening means is provided which can be put in and taken out from the fastening means from the outside. are doing. The tightening and loosening referred to here means, for example, tightening and loosening the fastening member. A blow pipe replacer according to a fourth aspect is the blow pipe replacer according to the third aspect, wherein the loosening means fixes a hydraulic cylinder as a drive source to a portable grip. A blow pipe replacer according to claim 5 is the blow pipe replacer according to claim 3 or 4, wherein the tightening / releasing means accommodates the elastic member in a mounting base of a fastening member of the blast furnace, and mounts the elastic member. The base of the fastening member is removably attached to the gantry, and the abutment protrusions of the loosening means are provided on the peripheral side surface of the attachment gantry and the peripheral side surface of the fastening member on the pedestal side, respectively.

[0008]

In the blow pipe changer according to the first or second aspect of the present invention, the front and rear arms of the front and rear arms are moved to the corresponding hook positions of the front and rear trunnions of the blow pipe by the movable carriage. While roughly arranging, finely adjusting each hooking position using the swing table, and then hooking the front hooking portion to the front trunnion by the front rotating means and raising the rear arm by the rear rotating means. When it is rotated, the tip of the blow pipe pivots downward around the front trunnion supported by the front hooking portion. Conversely, when the rear arm is pivoted downward, the tip of the blow pipe pivots the front trunnion. Rotate upward to the center. The blower pipe is vertically rotated by the rearward rotating means, the blower pipe is vertically rotated by the frontward rotating means, the rocking table is rocked, and optionally moved. By moving the dolly and attaching / detaching the hot air blowing part of the blow pipe to the tuyere of the blast furnace, and attaching / detaching the hot air intake part to the branch pipe of the annular pipe, the workability of the blow pipe replacement work is improved.
Work time can be shortened and safety can be improved. In the blow pipe changer according to claim 2, the workability of the blow pipe replacement work is further improved by turning the moving carriage around a specific fixed point by using the carriage fixed point turning means when necessary. To do.

Further, in the blow pipe changer according to the third to fifth aspects, the movable carriage is arranged below the blow pipe, and then the loosening means is inserted into the fastening means from the outside.
Then, the loosening means having the drive source extends the fastening member against the biasing force of the elastic member of the fastening means, and releases the fastening state between the blast furnace and the blow pipe by the fastening member.
The blow pipe removed from the blast furnace side is placed on a moving carriage and carried out, while a new blow pipe is carried to the tuyere side and mounted. After the blow pipe is attached to the tuyere, the fastening member previously stretched by the loosening means is bridged between the blast furnace and the blow pipe, and then the force on the loosening side of the loosening means is released, whereby the fastening means Since the fastening member is contracted by the urging force of the elastic member and the blow pipe is firmly fastened to the blast furnace, the worker does not have to go under the blow pipe for a long time and do the heavy work in the bad environment of the blast furnace. , You can easily loosen or tighten the fastening member. In the blow pipe changer according to claim 4, since the loosening means has good portability, when the blow pipe is attached to or removed from the tuyere, the loosening means can be easily brought to the work site and the grip can be grasped. The loosening means can be easily put in and taken out of the fastening means. When the rod of the hydraulic cylinder that is the drive source is taken in and out in the state of being inserted into the fastening means, the elastic member of the fastening means is expanded and contracted without a large force by the operator, and the blow pipe by the fastening member is expanded. Can be loosened or tightened to the blast furnace side.
In the blow pipe replacer according to claim 5, a loosening means is inserted between the abutment protrusion on the mounting base side and the abutment protrusion on the fastening member side, and the loosening means separates the abutment protrusions from each other. The fastening member is tightened or loosened by applying a force in the direction or releasing the force.

[0010]

In the blow pipe changer according to the first and second aspects of the present invention, the blow pipe is vertically rotated about the rear trunnion by the rear rotation means, and the front rotation means is provided. While selecting the rotation of the blow pipe about the front trunnion in the vertical direction, the horizontal swing of the swing table, and the movement of the movable carriage, the hot air blowout part of the blow pipe is attached to and removed from the tuyere of the blast furnace. Since the hot air intake part is attached to and detached from the branch pipe of the annular pipe,
The workability of replacing the blow pipe can be improved, the work time can be shortened, and the safety can be improved. Particularly, in the blow pipe changer according to the second aspect of the present invention, the movable carriage can be swung around a specific fixed point by the carriage fixed point turning means, if necessary, so that the workability of the blow pipe replacement work is further improved. Also, it is possible to improve the transportability due to the small turning.

Further, in the blow pipe changer according to the third to fifth aspects, when the blow pipe is pulled out by the loosening means with a drive source inserted from the outside into the fastening means,
The fastening state between the blast furnace and the blow pipe by the fastening member is loosened against the biasing force of the elastic member of the fastening means, while the force exerted by the loosening means on the elastic member is released when the blow pipe is attached, and the fastening member is used. Since the blow pipe is fastened to the blast furnace side, the fastening work of the fastening member can be easily realized in a short time. Particularly, in the blow pipe changer according to the fourth aspect, since the loosening means has good portability, when the blow pipe is attached to or removed from the tuyere, the loosening means can be easily brought to the work site and gripped. The loosening means can be easily put in and taken out of the fastening means. Since the hydraulic cylinder is used as the drive source, the loosening means to be handheld can be designed relatively lightweight and compact. In the blow pipe replacer according to claim 5, as the fastening and loosening means, an elastic member is housed in a mounting base of the fastening member of the blast furnace, and a contact protrusion of the loosening means is provided on the peripheral side surfaces of the mounting base and the fastening member. Since the blast furnace of the present invention is adopted, the existing blast furnace can be easily improved to one to which the blow pipe changer of the present invention can be applied.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the attached drawings, an embodiment in which the present invention is embodied will be described to provide an understanding of the present invention. Here, the blow-in / out direction of the blow pipe is the X direction, the direction orthogonal thereto is the Y direction, and the vertical direction is the Z direction. 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 start of the blow pipe replacement, and FIG. 3 is a start view of the blow pipe replacement. FIG. 4 is a plan view showing a previous state, 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 a usage state of a fastening member used in the blow pipe replacer according to FIG.
Is an enlarged plan view of an essential part showing a use state of the fastening member, FIG. 8 is an enlarged front view of the loosening means, and FIG. 9 is a sectional view taken along line S9-S9 of FIG.

First, the first aspect of the present invention will be described with reference to FIGS.
The blow pipe changer according to the embodiment will be described. As shown in FIG. 2, the blow pipe replacer 10 according to the first embodiment of the present invention includes a tuyere 12 of a blast furnace 11 and a branch pipe 13 extending from an annular pipe arranged around the furnace body. It is a device for replacing the blow pipe 14 connected between the two. The tuyere 12 is a tuyere hardware 1 attached to the through hole of the blast furnace 11.
The blow pipe 14 is connected to the tip of a large circle 16 connected to the back of the blow pipe 5, and the blow pipe 14 has a hot air blowing portion 17 at the tip.
front part pipe 1 in which a is detachably attached to the tuyere 12
7, and bolted to the base of the front side partial pipe 17,
Expansion 13a at the tip of the branch pipe 13 of the annular pipe
And a rear side partial pipe 18 provided on the upper portion thereof. Further, front trunnions 17b are provided on both sides of the base of the front partial pipe 17, and rear trunnions 18b are provided on both sides of the base of the rear partial pipe 18.

As shown in FIGS. 1 to 3, the blow pipe changer 10 has a self-propelled moving carriage 19, and a cyclo wheel 21 with a steering function having traveling motors 20a on both sides of the front end. The wheels 22 are attached to both sides of the rear end portion. Further, by inserting / removing the rod of the short hydraulic cylinder 110 into / from the central portion near the rear end of the moving carriage 19, the lateral turning roller 111 can be put in / out to a position below the ground contact surface height of the wheels 22 of the moving carriage 19, A bogie fixed point turning means 112 is provided. A swing table 20 that can move in the XY directions is mounted on the rear portion of the moving carriage 19. The swing table 20 includes a disc-shaped turn table 24 that is turned by a turn roller 23 that is turned by a turn motor (not shown), and a turn table 24.
Between the Y table 27 which is arranged on the Y table 27 and which is arranged on the Y table 27, the Y table 27 which is arranged on the Y table 27 and which is moved by moving the rod of the Y hydraulic cylinder 26 which is arranged between the pair of the Y linear guides 25. An X table 30 that moves by moving a rod of the arranged X hydraulic cylinder 29 in and out is provided.

A pair of columns 31 are erected on the X table 30 of the rocking table 20, and a rotating shaft 32 is horizontally provided between the columns 31. At both ends of the rotating shaft 32, the front ends of the front trunnions 17b are provided when the blow pipe is replaced.
A relatively long front arm 33 reaching up to is reached is fixed, and a relatively short rear arm 34 whose tip reaches the rear trunnion 18b at the time of replacement of the blow pipe is rotatably supported inside each of them. There is. A front hook 35, which is an example of a front hooking portion that can be hooked on the front trunnion 17b, is provided at the tip of the front arm 33 so as to be vertically rotatable via a pin 36. By moving the rod of the front hydraulic cylinder 37, which is an example of the front rotating means attached to the lower end of the front arm 33, the front hook 35 vertically rotates about the pin 36 and moves to the front trunnion 17b. Be hung up. A rear hook 38, which is an example of a rear side hooking portion, is formed at the tip of the rear arm 34, and the connecting rod 3 is provided between the base portions of both rear arms 34.
Nine are crossed. A hydraulic cylinder 4 which is an example of a rear-side rotation means axially rotatably mounted on the X table 30.
When the zero rod is moved in and out, the rear arm 34 pivots about the pivot shaft 32 in the vertical direction via the connecting rod 39 to which the tip of the rod is attached. 1 and 2, reference numeral 100 is a fastening member with a turnbuckle for connecting and fixing the blast furnace 11 and the blow pipe 14, reference numeral 101 is a fastening member with a turnbuckle for connecting and fixing the blast furnace 11 and the branch pipe 13, and a 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.

Next, the operation of the blow pipe changer 10 according to the first embodiment of the present invention will be described. At the time of pulling out the blow pipe, as shown in FIGS. 2 and 3, the blow pipe changer 10 is arranged so as to substantially face the blow pipe 14, and then the cyclo wheel 21 is rolled by the traveling motor 20a as shown in FIG. The swing table 20 is arranged below the blow pipe 14. As a result, the front and rear arms 33 and 34 and the rear hooks 35 and 38 are roughly arranged at the hooking positions of the front and rear trunnions 17b and 18b of the corresponding blow pipes 14, respectively. After that, 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 hooking positions. Next, the front hydraulic cylinder 37 and the hydraulic cylinder 40
By projecting the rod of a predetermined amount, the front and rear hooks 35 and 38 are hooked on the front and rear trunnions 17b and 18b, and the blow pipe 14 is supported downward by the front and rear arms 33 and 34.

Then, the fastening member 100 fastening the blast furnace 11 and the blow pipe 14 is removed, the rod of the hydraulic cylinder 40 is further projected, and the rear arm 34 is rotated upward. Is lifted, the tip of the blow pipe 14 is rotated downward around the front trunnion 17b supported by the front hook 35, and the rod of the hydraulic cylinder 40 is retracted.
On the contrary, the front end of the blow pipe 14 is the front trunnion 17
Rotate upward around b. For these rod operations, the turning table 24 and the Y table 27 are set to the free state, and X
As shown in FIG. 5, the hot air blowing portion 17a of the blow pipe 14 is disengaged from the tuyere 12 and the hot air intake portion 18a is disengaged from the branch pipe 13 by appropriately performing the operation while moving the table 30 rearward.

At this time, the branch pipe 13 and the hot air intake portion 18
Although a large load is applied to the connection part with a, the blow pipe 1
The expansion 13a at the tip of the branch pipe 13 contracts as the base portion of No. 4 is pulled up, so that this connecting portion is not broken. After that, the blow pipe 14 that has been pulled out is the hydraulic cylinder 1 of the bogie fixed point turning means 112.
The wheel 22 is floated by projecting the rod 10 and the revolving roller 111 downward.
The movable carriage 19 is turned by a small turn 11 and is conveyed to the replacement stage of the blow pipe 14. The work of mounting the blow pipe 14 on the side of the blast furnace 11 is performed in the opposite direction. In this way, since 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 pipe, the workability of the replacement work of the blow pipe 14 is improved. Work time can be shortened and safety can be improved. In addition, the cart fixed point turning means 11
By rotating the movable carriage 19 by using 2, the blow pipe 14 with a small turning effect can be conveyed.

Next, the second aspect of the present invention will be described with reference to FIGS.
The blow pipe changer according to the embodiment will be described. As shown in FIGS. 6 and 7, the blow pipe replacer 50 according to the second embodiment is provided between the blast furnace 11 and the fastening member 100.
A fastening means 52 with a spring 51, which is an example of an elastic member that acts on the fastening side with respect to the fastening member 100, is provided, and a loosening means 53 for the fastening means 52 that is taken in and out from the fastening means 52 from the outside is provided. With this, the fastening work of the fastening member 100 can be easily performed in a short time. Hereinafter, the blow pipe changer 50 will be described in detail.
First, the fastening means 52 will be described. On the peripheral side surface of the furnace bottom of the blast furnace 11, a container-shaped mounting base 54 that serves as a connecting portion of the fastening member 100 on the blast furnace 11 side is detachably bolted, and the center of the end surface of the mounting base 54 is attached. ,
A square through hole 54a is formed. This through hole 5
A rectangular base 57 of the fastening member 100 is inserted from the outside into 4a, and a thick disk-shaped pad plate 55 is fixed near the tip of the base 57. The coil-shaped spring 51 is accommodated between the backing 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 urged by the urging force of the spring 51. By pulling the fastening member 100, which is interposed between and with no flexibility in the length direction, toward the blast furnace 11 side,
The blow pipe 14 is firmly fastened to the blast furnace 11.

A pair of abutting protrusions 56A of the loosening means 53 whose front end faces the fastening member 100 side are fixed at opposite positions of the peripheral side surface on the front end side of the mounting base 54 (see also FIG. 9). Abutting protrusion 5 on the fastening member 100 side corresponding to
6B project from both side surfaces of the joint member 58, which is the main body of the universal joint provided in the fastening member 100, on the blast furnace 11 side. The contact protrusion 56B has a receiving plate 56a at the bottom. Here, the structure of the fastening member 100, which is originally an off-the-shelf product, will be briefly described in order from the base portion 57 side. The end portion of the base portion 57 is axially attached to the blast furnace 11 side of the joint member 58 via the pin 59. , Joint member 5
A bolt 61a on one end side of a turnbuckle 61 provided on the fastening member 100 is axially attached to the blow pipe 14 side of No. 8 via a pin 60. The relatively long bolt 61b on the other end side of the turn bag 61 is used for the fastening bracket 6 extending from the lower portion of the rear partial pipe 18 of the blow pipe 14.
2 is fastened to the downward U-shaped notch 62a via a washer 63 and a nut 64 whose contact surfaces are arcuate. When the operator rotates the handle 61c, the bolts 61a and 61b move toward or away from each other, and the length of the fastening member 100 is adjusted. However,
The present invention eliminates the need for such manual length adjustment. Next, the loosening means 53 will be described in detail with reference to FIGS. The same components as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 6-9, the loosening means 53 is
The grip 66 has a plate-like grip 66 that is substantially C-shaped when viewed from the front and has a grip hole 65 formed in the center.
A small hydraulic cylinder 68, which is a drive source, is attached to the bifurcated tip of the through a cylinder base 67 arranged on the back surface.
The base parts of the are respectively bolted. The contact cap 69 is attached to the tip of the rod 68a of the hydraulic cylinder 68.
Is attached. Further, oil is supplied to each hydraulic cylinder 68 via hydraulic pipes 70A and 70B, and the hydraulic pipe 70A whose one end portion is bent is fixed near the grip hole 65 of the grip 66, and externally connected. Extending to. Of course, a flexible pipe is connected between the hydraulic pipes 70A and 70B and a hydraulic source (not shown).

Next, the operation of the blow pipe changer 50 according to the second embodiment of the present invention will be described. As shown in FIGS. 6 to 8, when pulling out the blow pipe, an operator grips the grip 66 to attach the loosening means 53 to the mounting base 54.
Side contact protrusion 56A and the contact member 5 side contact protrusion 5
Insert between 6B. 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 respective hydraulic cylinders 68 are connected to the contact protrusions 56B.
It is placed on the receiving plate 56a. Next, when the rod 68a of the hydraulic cylinder 68 is projected in this state, the contact cap 69 contacts the contact protrusion 56B, and then the contact protrusion 56A side is used as a fulcrum to resist the biasing force of the spring 51. Then, the contact protrusion 56B is pushed outward. As a result, the fastening member 100 extends and the worker can sneak under the narrow blow pipe 14 for a long time, and the fastening member 100 can be loosened easily and in a short time without turning the handle 61c of the turnbuckle 61.

When the blow pipe is attached, the blow pipe 1
4 is attached to the tuyere 12, and then the fastening member 100 stretched by the loosening means 53 is again attached to the blast furnace 11 and the blow pipe 1.
4 and then pulling in the rod 68a of the hydraulic cylinder 68 of the loosening means 53, 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 in a short time. In this way, since the loosening means 53 having a good portability is adopted, when the blow pipe 14 is attached to or removed from the tuyere 12, the loosening means 53 can be easily brought to the work site, and the grip 66 can be grasped and loosened. The means 53 can be easily put in and taken out of the fastening means 52. Further, since the hydraulic cylinder 68 is adopted as the drive source, the loosening means 53 to be handheld can be designed relatively lightweight and compact. Furthermore, as the fastening / loosening means 52, the mounting base 5 of the blast furnace 11
4 stores the spring 51, and also mounts 54
Further, since the abutting projections 56A and 56B of the hydraulic cylinder 68 are provided on the peripheral side surface of the fastening member 100, the blow pipe mounting specification of the existing blast furnace 11 can be easily achieved by the blow pipe replacer 50 of the present invention. Can be changed to applicable specifications.

The embodiment of the present invention has been described above.
The present invention is not limited to this embodiment, and even if there are design changes and the like without departing from the spirit of the present invention, they are included in the present invention. For example, the protruding positions of the blow pipes of the front and rear trunnions are not limited to the embodiment,
If the front trunnion is the front and the rear trunnion is the rear, it may be provided at any position of the blow pipe. In the embodiment, the swing table having the horizontal movement function and the horizontal turning function is adopted, but the swing table is not limited to this, and the one having the lifting function may be adopted. Furthermore, in the embodiment, as the rear side rotation means, a means for vertically rotating the entire rear arm is adopted, but without being limited to this, for example, only the rear side hook portion may be vertically rotated. Alternatively, a part of the arm may be rotated. Also, as the front-side rotation means, a means for vertically rotating only the front-side hooking portion is adopted, but it is also possible to rotate the entire front arm,
A part of the arm may be rotated.

In the embodiment, hydraulic cylinders are used as the front and rear turning 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-side rotating means for rotating the front-side hooking portion of the front arm in the vertical direction is provided. However, the invention is not limited to this, and the front-side rotating means may be omitted in the present invention. included. In the embodiment, the carriage fixed point turning means is provided on the moving carriage, but this means need not necessarily be provided on the moving carriage. The order of the work of inserting and removing the blow pipes by the blow pipe changer is not limited to that of the embodiment, and may be any other order.

Further, in the second embodiment, the moving carriage of the first embodiment is adopted, but the moving carriage is not limited to this, and for example, a blow pipe is simply placed and moved. It may be a dolly. In the second embodiment, the coil-shaped 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 and loosening means in the second embodiment need not be limited to the structure described in the embodiment. Moreover, the drive source of the loosening means is not limited to the hydraulic cylinder, but may be an electric cylinder or an electric jack, for example.

[Brief description of drawings]

FIG. 1 is a perspective view of a blow pipe changer according to a first embodiment of the present invention.

FIG. 2 is a side view showing a state before the replacement of the blow pipe is started.

FIG. 3 is a plan view showing a state before the replacement of the blow pipe is started.

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 extracting the blow pipe.

FIG. 6 is an enlarged side view showing a usage state of a fastening member used in the blow pipe changer according to the second embodiment of the present invention.

FIG. 7 is an enlarged plan view of an essential part showing a usage state of the fastening member.

FIG. 8 is an enlarged front view of the loosening means.

9 is a cross-sectional view taken along the line S9-S9 of FIG.

[Explanation of symbols]

10 Blow Pipe Changer 11 Blast Furnace 12 Tuyere 13 Branch Pipe 13a Expansion 14 Blow Pipe 15 Tuyere Hardware 16 Daimaru 17 Front Part Pipe 17a Hot Air Blowout 17b Front Trunnion 18 Rear Part Pipe 18a Hot Air Intake 18b Rear Trunnion 19 Mobile Dolly 20 Swing Table 20a Traveling Motor 21 Cyclo Wheel 22 Wheel 23 Swiveling Roller 24 Swiveling Table 25 Y Linear Guide 26 Y Hydraulic Cylinder 27 Y Table 28 X Linear Guide 29 X Hydraulic Cylinder 30 X Table 31 Strut 32 32 Rotating Shaft 33 Front arm 34 Rear arm 35 Front hook 36 pins 37 Front hydraulic cylinder 38 Rear hook 39 Connecting rod 40 Hydraulic cylinder 50 Blow pipe replacement machine 51 Spring 52 Tightening / loosening means 53 Loosening means 5 4 Mounting frame 54a Through hole 55 Abutment plate 56A Abutment protrusion 56B Abutment protrusion 56a Receiving plate 57 Base part 58 Joint member 59 pin 60 pin 61 Turnbuckle 61a Bolt 61b Bolt 61c Handle 62 Fastening bracket 62a Notch part 63 Washer 64 Nut 65 Grip Hole 66 Grip 67 Cylinder Base 68 Hydraulic Cylinder 68a Rod 69 Abutment Cap 70A Hydraulic Piping 70B Hydraulic Piping 100 Fastening Member 101 Fastening Member 102 Viewing Window 103 Hanging Hook 104 Hydraulic Unit 105 Battery 106 Control Unit 110 Hydraulic Cylinder 111 Turning Roller 112 bogie fixed point turning means

Front Page Continuation (72) Inventor Masahiro Takasaki 11-26 Miyoshino, Hachimannishi-ku, Kitakyushu, Fukuoka

Claims (5)

[Claims] 1. A hot air blowing portion at a tip end is detachably attached to a tuyere of a blast furnace, and a hot air intake portion attachable to a branch pipe extending from an annular pipe around a furnace body is provided at an upper portion of a base portion. In a blow pipe changer for replacing a blow pipe, the blow pipe is provided with a front trunnion and a rear trunnion, and a swing table is mounted on a movable carriage as a main body, and the swing table has the front side. A front arm having a front hooking portion capable of being hooked on the trunnion, at least the front hooking portion being rotatable in the vertical direction, a front rotating means of the front hooking portion, and the rear trunnion. A rear arm having a rear-side hooking portion capable of being hooked, at least the rear-side hooking portion being vertically rotatable, and a rear-side rotating means of the rear-side hooking portion are provided. Blow pipe changer characterized by 2. The blow pipe changer according to claim 1, wherein the movable carriage is provided with a carriage fixed point turning means. 3. The hot air blowing part at the tip part is detachably attached to the tuyere of the blast furnace via a fastening member whose length is adjustable, and extends from the annular pipe around the furnace body to the upper part of the base part. In a blow pipe changer equipped with a trolley of blow pipes provided with a hot air intake part that can be attached to a branch pipe, the blow pipe replacement machine acts between the blast furnace and the fastening member on the fastening side with respect to the fastening member. And a drive source, and a loosening means of the fastening means that can be put in and taken out of the fastening means from the outside. Replacement machine. 4. The blow pipe changer according to claim 3, wherein the loosening means is a portable grip having a hydraulic cylinder as a drive source fixed thereto. 5. The tightening / releasing means has the elastic member housed in a mounting base for a fastening member of the blast furnace, and the base of the fastening member is removably mounted in the mounting base. The blow pipe replacer according to claim 3 or 4, wherein the peripheral side surface and the peripheral side surface of the fastening member on the mounting frame side are provided with abutting protrusions of the loosening means, respectively.