JPH06108130A - Device for replacing tuyere connecting tube - Google Patents

Abstract

PURPOSE:To mechanize the replace of a tuyere connecting tube by making a fork and a attaching/detaching machine for a fastening/loosening machine travel along an annular tube and making these swingable. CONSTITUTION:A travelling frame 22 is made to travel along the rail 21, and the fork 26 and a guide cell 33 are shifted to the front surface of the tuyere 6 to be changed. A swinging frame 23 is moved toward the neighborhood of a nut 13 with a handle in a fastening device 11, and the guide cell 33 is moved in the upper and lower direction and to the right and left side so as to be possible to fasten/loosen a blow pipe 9 by the fastening/loosening machine 41. Successively, at the time of removing the tuyere 6, a tuyere pull-out rod is set to an air hammer 38, and the guide cell 33 and the fork 26 are extended to the max., and by reversely hitting the air hammer 38, the pull-out swinging frame 23 is swung and the tuyere is laid on the tuyere laying table. In such a way, by the simple device constitution, the replace of the tuyere connecting tube is mechanized and the working efficiency can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tuyere connecting pipe replacement device in a blast furnace or the like.

[0002]

2. Description of the Related Art Tuyere connecting pipes in blast furnaces, etc. are composed of lower vents, blow pipes, etc., but they must be replaced periodically depending on the life of their constituent materials.

[0003] In the conventional replacement work of the tuyere connecting pipe, an electric hoist provided under the annular pipe around the furnace body or a forklift traveling on the working floor is used to move the lower vent, the blow pipe, etc. to a predetermined position. After transportation, it will be replaced by 4 to 6 people / group.

[0004]

However, there is a problem in that the work of replacing the tuyere connecting pipe by human power is heavy work and its work efficiency is low.

It is an object of the present invention to realize mechanization of replacement of tuyere connecting pipe with a simple device configuration and to improve workability and work efficiency.

[0006]

The present invention comprises a lower vent connected to a tuyere provided in a furnace body and a blow pipe,
In a device for replacing a tuyere connecting pipe, the lower vent and the blow pipe are fastened to the tuyere by a fastening device, and the lower vent is coupled to an expansion provided in an annular pipe around the furnace body by a coupling device. , A fork that supports a traveling platform suspended on an annular traveling path provided on an annular pipe, a swivel platform is supported on the traveling platform, and a lower vent and a blow pipe can be supported, and its moving device and fastening device can be tightened and loosened. The tightening / loosening machine and its moving device, and the engaging / disengaging machine and its moving device capable of engaging / disengaging the connecting device are supported on the swivel base.

[0007]

[Operation] Fork used to replace the tuyere connecting pipe, tightener,
By allowing the engagement / disengagement machine to run along the annular pipe and to make it turnable, centering of each tuyere can be facilitated, and there is no interference with surrounding equipment, and the device can be made compact.

Due to mechanization of replacement work, for example, 2 people /
The small personnel of the group (operator and signaler) can perform replacement work with high efficiency without heavy labor.

[0009]

1 is a side view showing an embodiment of the present invention, and FIG.
1 is a plan view of FIG. 1, FIG. 3 is a schematic diagram showing a cradle traveling state, FIG. 4 is a schematic diagram showing a blow pipe fastening and detaching state, FIG. 5 is a schematic diagram showing a lower vent connection detaching state, and FIG. 6 is a blow pipe detaching state. FIG. 7 is a schematic diagram showing a blow pipe moving state, FIG. 8 is a schematic diagram showing a tuyere removed state, FIG. 9 is a schematic diagram showing a water cooling box removed state, and FIG. 10 is a tuyere attached state. It is a schematic diagram which shows.

In FIG. 1, reference numeral 1 is a furnace body, 2 is an annular tube around the furnace body 1, 3 is an expansion provided in the annular tube 2, and the furnace body 1 has a tuyere receiving member 4 and a water cooling box 5. , Tuyere 6
Is provided. The tuyere 6 has a tuyere connecting pipe 7
9 can be connected to the lower vent 8 and the blow pipe constituting the above.

At this time, the lower vent 8 and the blow pipe 9
The attachment structure of the to the tuyere 6 is as follows.

First, the lower vent 8 and the blow pipe 9 are fastened to the tuyere 6 by a fastening device 11 composed of a fastening bolt 12, a nut 13 and a spring 14. The fastening device 11 is
A nut 13 with a handle is screwed to the free end of a fastening bolt 12 planted in the tuyere receiving object 4, and an arm 8A of the lower vent 8 is pressed by a spring 14 supported by the nut 13 on the rear surface. The spring force of the spring 14 causes the lower vent 8 and the blow pipe 9 to be integrally pressed against the tuyere 6.

Next, the lower vent 8 is connected to the expansion 3 by the connecting device 15. The connecting device 15 inserts the connecting pin 8B of the lower vent 8 into the shackle plate 17 suspended from the support shaft 16 provided in the expansion 3 and drives the cotter 18 between the shackle plate 17 and the connecting pin 8B. The lower vent 8 is integrated with the expansion 3.

However, the replacement device 20 makes it possible to replace the tuyere connecting pipe 7 including the lower vent 8 and the blow pipe 9 as follows (see FIGS. 1 and 2).

The exchanging device 20 is provided with a rail 21 (annular traveling path) along the lower surface of the annular pipe 2, a traveling platform 22 is suspended and supported on the rail 21, and a swiveling platform 23 is mounted on the traveling platform 22.
I support you. Reference numeral 22A is a hydraulic traveling motor for traveling the traveling mount 22, and 23A is a hydraulic swing motor for rotating the swivel mount 23.

Fork guides 25 are hung on both left and right sides of the swivel base 23 via fork vertical movement hydraulic cylinders 24. Left and right fork guides 25
A pair of forks 26 is supported in the front and back so as to be movable back and forth. A fork front-rear moving hydraulic cylinder 27 is interposed between the fork guide 25 and the fork 26. That is, the left and right forks 26 move up and down and forward and backward by the fork vertical movement hydraulic cylinder 24 and the fork front and rear movement hydraulic cylinder 27, and the support pins 8C projecting on both sides of the lower vent 8 and both sides of the blow pipe 9. It is possible to support the support plate 9A protruding from the section.

Inside the swivel base 23, an elevating base 32 is suspended via a guide cell vertical movement hydraulic cylinder 31. A guide cell 33 is laterally supported on the elevating frame 32. A guide cell lateral movement hydraulic motor 34 is mounted on the elevating stand 32, and the guide cell 33 is connected to a chain 35 which is rotated by the motor 34. That is, the guide cell 33 is moved vertically and horizontally by the guide cell vertical movement hydraulic cylinder 31 and the guide cell lateral movement hydraulic motor 34.

An air hammer pedestal 36 is supported on the guide cell 33 by an air hammer forward / backward moving hydraulic cylinder 37 so as to be movable back and forth, and an air hammer 38 (disengagement machine) is mounted on the air hammer pedestal 36. The air hammer 38
The connecting device 15 for connecting the lower vent 8 to the expansion 3 is made disengageable, and specifically, the cotter 18 is disengaged as described later. Air hammer 38
Also engages / disengages the water cooling box 5 and the tuyere 6, as will be described later.

The guide cell 33 includes a hydraulic nut tightening / loosening machine 4
1 is also supported. The fastening device 41 is capable of fastening the fastening device 11 that fastens the lower vent 8 and the blow pipe 9 to the tuyere 6, and specifically, the fastening nut 13 is fastened as described later. To do.

The procedure for replacing the tuyere connecting pipe 7 by the replacement device 20 will be described below. (1) Movement of the traveling platform 22 (see FIG. 3) The traveling platform 22 travels along the rails 21, and the fork 2 is moved.
6. Position the guide cell 33 in front of the tuyere 6 to be replaced.

(2) Detachment of the blow pipe 9 (see FIG. 4) The swivel base 23 is moved toward the handle nuts 13 of one of the left and right fastening devices 11, and the guide cell 33 is moved vertically and horizontally. Then, the fastening / loosening tool 41A of the fastening / loosening machine 41 is moved forward to be engaged with the handle of the nut 13 with the handle.
Then, the nut 13 with the handle is reversely rotated and loosened by the tightening device 41. After that, the tightening / loosening machine 41 is retracted, the guide cell 33 is made to traverse, and the nut 13 with the handle of the other left and right fastening device 11 is loosened. As a result, the above-described fastening by the left and right fastening devices 11 is released.

(3) Removing the cotter of the lower vent 8 (see FIG. 5) Set the cotter rod 51 on the air hammer 38, move the guide cell 33 up and down, left and right, and align the rod 51 with the cotter 18 of the connecting device 15. , Stop with a pin. next,
The fork 26 is moved forward, and the fork 26 supports the support pin 8C of the lower vent 8 and the support plate 9A of the blow pipe 9.
Support. When this support is confirmed, the air hammer 38 is hit in the reverse direction, and the cotter 18 is immediately removed. After that, the guide cell 33 is moved left and right, and the other left and right cotters 18 are removed. As a result, the aforementioned connection by the left and right connecting devices 15 is released.

(4) Removal of blow pipe 9 (see FIG. 6) The guide cell 33 is retracted, raised, and traversed to the left or right to the full extent, and the central portions of the left and right forks 26 are opened.
Then, while lowering the lower vent 8 and blow pipe 9 supported on the fork 26, the fork 26
To lower.

(5) Movement of blow pipe 9 (see FIG. 7) While the lower vent 8 and the blow pipe 9 are supported by the fork 26, the swivel base 23 is slowly swung, and at the same time, the traveling base 22 also travels on the rail 21. Then, the tip of the blow pipe 9 is moved so as not to hit the adjacent lower vent 8 or the like.

(6) Removal of tuyere 6 (see FIG. 8) The tuyere pulling rod 52 is set on the air hammer 38. Extend the guide cell 33 and the fork 26 to the maximum,
The rod 52 is hooked on the tuyere 6 and pulled out by the reverse impact of the air hammer 38. Pulled tuyere 6 is air hammer 38
And the guide cell 33 and the fork 26 are simultaneously retracted, the traveling platform 22 is caused to travel while the swivel platform 23 is swiveling in the same manner as the movement of the blow pipe 9, and is transferred onto the tuyere mounting stage.

(7) Removal of the water cooling box 5 (see FIG. 9) The reaction force receiving plate 53 is set on the fork 26, and the tuyere receiving object 4
Apply to. The guide cell 33 is advanced and applied to the reaction force receiving plate 53 to receive the reaction force. The water cooling box extraction rod 54 is set on the air hammer 38. The rod 54 is hooked on the water cooling box 5 and pulled out by the reverse impact of the air hammer 38. The water cooling box 5 is taken out by the two forks 26 after removing the reaction force receiving plate 53 and the water cooling box drawing rod 54.

(8) Attachment of tuyere 6 (see FIG. 10) The tuyere attachment rod 55 is set on the air hammer 38. A rod holder is attached to the tip of the fork 26, and the guide cell 3
3, the fork 26 and the air hammer 38 are moved forward, and the tuyere 6
When the water can be set in the water cooling box 5, the air hammer 38 is driven and driven. The guide cell 33 is lowered, the rod 55 is removed from the tuyere 6, and the rod 55 is retracted.

The procedure for attaching the lower vent 8 and the blow pipe 9 to the tuyere 6 is the reverse of the above procedure.

The operation of this embodiment will be described below. By moving the fork 26, the air hammer 38, and the nut tightening / loosening machine 41 used to replace the tuyere connecting pipe 7 along the annular pipe 2 and allowing them to turn, the centering of each tuyere 6 can be facilitated. It can be made compact without any interference with surrounding equipment.

By mechanization of replacement work, for example, 2 people /
The small personnel of the group (operator and signaler) can perform replacement work with high efficiency without heavy labor.

[0031]

As described above, according to the present invention, mechanization of replacement of the tuyere connecting pipe is realized with a simple device configuration.
Workability and work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a schematic view showing a traveling state of the gantry.

FIG. 4 is a schematic diagram showing a blow pipe fastening detached state.

FIG. 5 is a schematic view showing a state where the lower vent is disconnected.

FIG. 6 is a schematic view showing a blow pipe removed state.

FIG. 7 is a schematic diagram showing a blow pipe moving state.

FIG. 8 is a schematic view showing a tuyere removed state.

FIG. 9 is a schematic view showing a water cooling box removed state.

FIG. 10 is a schematic view showing a tuyere attached state.

[Explanation of symbols]

 1 Furnace Body 2 Annular Pipe 6 Tuyere 7 Tuyere Connection Pipe 8 Lower Vent 9 Blow Pipe 11 Fastening Device 15 Coupling Device 22 Traveling Platform 23 Swiveling Platform 26 Fork 38 Air Hammer (Disengagement Machine) 41 Nut Tightening Machine

Claims (1)

[Claims] 1. A lower vent connected to a tuyere provided in a furnace body and a blow pipe, the lower vent and the blow pipe are fastened to the tuyere by a fastening device, and the lower vent is connected by a connecting device around the furnace body. In the replacement device for the tuyere connecting pipe, which is connected to the expansion provided in the annular pipe, the traveling platform is suspended and supported on the annular traveling path provided in the annular pipe, and the swivel platform is supported on the traveling platform. , A fork and its moving device that can support the lower vent and the blow pipe, a slackening machine and its moving device that can fasten the fastening device, and a disengaging device and its moving device that can disengage the connecting device. And a tuyere connecting pipe replacement device, wherein: