JP7337736B2 - Installation method and equipment for new embedded pipes - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a new embedded pipe installation method and installation apparatus for installing a new embedded pipe in a hearth bed that is raised in a coke oven.

The regenerator of the coke oven takes in heat from the flue gas from the combustion chamber and uses that heat to increase the temperature of the fuel or air supplied to the upper combustion chamber. A large number of pipes for supplying fuel and air are arranged in a row in the heat storage chamber, and these pipes are arranged at predetermined pitch intervals as embedded pipes in the hearth bed of the combustion chamber.

In order to change the structure of the existing hearth bed, it is necessary to raise the concrete slab of the hearth bed and install a new embedded pipe (steel pipe). In that case, first cut off the base of the existing embedded pipe exposed from the slab surface, and then insert a sheath pipe, etc., to make the embedded pipe (newly embedded pipe) of a length corresponding to the raised portion of the concrete slab. The embedded pipe, called the “installation pipe,” is attached to the existing embedded pipe.

As a cutting device for steel pipes of this type, for example, a fixture for a steel pipe pile cutting device described in Patent Document 1, or an installation method for buried pipes described in Patent Document 2, and the like are known.

JP-A-11-188526 JP 2017-227033 A

However, in the conventional method, new embedded pipes are installed one by one for cut steel pipes or steel pipe piles. Ta.

SUMMARY OF THE INVENTION In view of such circumstances, it is an object of the present invention to enable a new embedded pipe to be installed efficiently and with high accuracy.

The new embedded pipe installation method of the present invention is a new embedded pipe installation method for installing a new embedded pipe in a hearth bed that is raised in a coke oven. A sheath tube unit formed by unitizing a sheath tube corresponding to an existing embedded tube is moved above the existing slab, the sheath tube unit is placed on the existing slab, and moved upward with respect to the existing embedded tube. A plurality of sheath tube units are sequentially placed over the entire hearth bed to be raised, and concrete is placed on the existing slab.

Further, a new embedded pipe installation device of the present invention is a new embedded pipe installation device for installing a new embedded pipe in a hearth base for raising the height of a coke oven, wherein the furnace length of the coke oven and a plurality of sheath pipes supported by the frame corresponding to predetermined existing embedded pipes. It is characterized in that a plurality of said sheath tube units are successively placed on the whole hearth bed, and concrete is placed on said existing slab.

According to the present invention, it is possible to install a new embedded pipe efficiently and with high precision, and to greatly shorten the work period for coke oven repair work.

It is a figure which shows the example of the coke oven which raises according to embodiment of this invention. FIG. 4 is a plan view showing an example of arrangement of existing embedded pipes on an existing slab of the hearth bed according to the embodiment of the present invention; FIG. 4 is a perspective view showing a state in which an existing embedded pipe on an existing slab is cut to a predetermined length according to the embodiment of the present invention; FIG. 4 is a plan view showing a configuration example of the sheath tube unit according to the embodiment of the present invention; FIG. 4 is a longitudinal side view of the sheath tube unit according to the embodiment of the present invention; FIG. 4 is a diagram showing a sheath tube fixed to the frame of the sheath tube unit according to the embodiment of the present invention; FIG. 4 is a diagram showing suspension members fixed to the frame of the sheath tube unit according to the embodiment of the present invention; FIG. 3 is a plan view showing a sheath tube unit placed on the hearth bed in the embodiment of the present invention; FIG. 4A is a perspective view and a cross-sectional view of a leveling base according to an embodiment of the present invention; FIG. 4 is a diagram showing how a sheath pipe unit is moved by a crane at a repair work site according to the embodiment of the present invention. FIG. 5 is a diagram showing how the sheath tube unit is placed on the existing slab in the embodiment of the present invention; FIG. 4 is a diagram showing a state in which sheath tubes are fitted to all existing embedded tubes of the hearth bed in the embodiment of the present invention; It is a figure which shows the mode at the time of the raising completion of the hearth board in embodiment of this invention.

Preferred embodiments of the present invention will be described below with reference to the drawings.
In the embodiment of the present invention, for example, the aged coke oven 100 is dismantled as shown in FIG. Concrete is placed in the existing hearth bed 1 to raise the height. In this case, in the coke oven 100, a large number of existing embedded pipes 3 are arranged on the existing slab 2 of the hearth bed 1 at a predetermined pitch as shown in FIG. In addition, the existing slab 2 is in the furnace length direction (X direction in FIG. 2 in this example) between PS (Pusher Side) and CS (Coke Side), and is an extremely wide area along the furnace length direction (Y direction in FIG. 2). It spans
The coke oven 100 is basically made of bricks, and is constructed by stacking a large number of bricks on a hearth bed.

In the coke oven 100 in which the bricks are dismantled and the existing slab 2 is exposed, the existing embedded pipe 3 embedded in the existing slab 2 is cut flat with respect to the vertical direction at a predetermined height position from the embedding surface. be. In order to cut the existing embedded pipe 3, for example, the above-described conventional embedded pipe cutting device or the like is used. FIG. 3 shows a state in which the existing embedded pipes 3 on the existing slab 2 are each cut to a predetermined length by an embedded pipe cutting device or the like. A new embedded pipe is fitted to each existing embedded pipe 3 .

In the new embedded pipe installation method for installing a new embedded pipe in the hearth bed 1 that is raised in the coke oven 100 of the present invention, it corresponds to a predetermined existing embedded pipe 3 embedded in the existing slab 2 A sheath tube unit formed by unitizing the sheath tube is moved above the existing slab 2, leveled when the sheath tube unit is placed on the existing slab 2, and newly installed to the existing embedded tube 3 from above. A plurality of sheath tube units are sequentially placed on the entire hearth bed 1 to be raised by fitting the embedded tubes, and then concrete is placed on the existing slab 2 .

In addition, the apparatus for installing a new embedded pipe of the present invention includes a frame that extends with a length equivalent to the oven length of the coke oven 100, and a predetermined existing embedded pipe 3 that is supported by the frame. and a leveling base for leveling the sheath tube unit when the sheath tube unit is placed on the existing slab 2. - 特許庁

FIG. 4 is a plan view showing a configuration example of the sheath tube unit 10 in this embodiment. A plurality of sleeve pipes 12 supported in the vertical direction are arranged on both sides (in the furnace length direction Y) of a pair of mutually parallel frames 11 extending in the furnace length direction X, respectively. In this embodiment, the sheath tube unit 10 is configured by unitizing the sheath tubes 12 for at least one furnace, but the sheath tubes 12 for two or more furnaces may be unitized. is used to fit the new embedded tube. The diameter of the sheath tube 12 is set so that it fits snugly on the outer diameter of the existing embedded tube 3 .

FIG. 5 is a side view of the sheath tube unit 10 in this embodiment as viewed in the longitudinal direction. In this embodiment, for example, a pair of H steels are used as the frame 11, and the H shape is arranged in a state rotated by 90°. The upper and lower inner flanges 11a of the H steels are connected to each other through the bridges 13, respectively, and integrated as the frame 11. As shown in FIG. Frame 11 and bridge 13 are joined by welding. A plurality of bridges 13 are arranged at predetermined pitch intervals along the longitudinal direction of the frame 11, and the frame 11 as a whole constitutes a rigid structure.

To the upper and lower outer flanges 11b of each H steel, sheath pipes 12 to be newly embedded pipes are vertically attached so as to correspond to the existing embedded pipes 3, respectively. In this case, a pair of upper and lower brackets 14 fixed by welding to the upper and lower outer flanges 11b of the H steel protrude laterally from the frame 11, and the sheath pipe 12 is fixed to the brackets 14 by welding. This bracket 14 has, for example, a trapezoidal shape as shown in FIG.

As shown in FIG. 4, a pair of hanging members 16 are protruded from both sides of the frame 11 at predetermined intervals along the longitudinal direction. Here, since the sheath tube unit 10 of the present invention is suspended by a crane and moved to an installation site, it has a suspending member 16 for hooking a suspending hook on the crane side. As shown in FIG. 7, the suspending member 16 is arranged across the upper and lower outer flanges 11b of each H steel so as to be perpendicular to the frame 11, and is fixed to the H steel by welding. The suspension member 16 is provided with a hook hole 16a for hooking a hook on the crane side, and in this example, the sheath pipe unit 10 is supported by the crane via four suspension members 16, that is, at four points. .

In the whole hearth bed 1 to be raised, a plurality of sheath tube units 10 are sequentially placed by crane operation as shown in FIG. A sheath tube 12, which is a tube, is fitted.

When the sheath tube unit 10 is placed on the existing slab 2 using the crane described above, the sheath tube unit 10 is leveled. FIG. 9 shows a leveling base 17 used for leveling the sheath tube unit 10. FIG. A plurality of leveling bases 17 are arranged along the longitudinal direction of the sheath tube unit 10 by using the space between the existing embedded tubes 3 . As shown in FIG. 9(a), the leveling base 17 is formed by connecting, for example, a pair of angle steels 18 in a symmetrical manner. A spacer 19 and two nuts 20 are sandwiched between the pair of angle steels 18, and the pair of angle steels 18 are joined to each other by welding via the spacer 19 and nuts 20. As shown in FIG.

The two nuts 20 are spaced apart from each other according to the spacing of the pair of H steels forming the frame 11, and adjust bolts 21 are vertically passed through them. As shown in FIG. 9(b), the adjustment bolt 21 supports the H steel of the frame 11 and adjusts the height of the frame 11 appropriately to adjust the height of the frame 11. This allows the leveling base 17 to become the sheath tube unit. 10 can be leveled. The base of the leveling base 17 is fixed to the existing slab 2 with a plurality of anchor bolts 22 .

In the new embedded pipe installation method of the present invention, the sheath tube unit 10 is assembled in advance at a separate assembly site away from the coke oven refurbishment work site, and then transported to the refurbishment work site by trailer. At the repair work site, as shown in FIG. 10, the sheath tube unit 10 is suspended by a crane 200 and moved onto the existing slab 2, which is the installation site. The sheath pipe unit 10 is stably supported by hooking the hanging hook of the crane 200 on the suspension member 16 .

As shown in FIG. 11, the existing slab 2 on which the sheath tube unit 10 is placed is provided with a plurality of (for example, 4 to 6) leveling bases 17 along the longitudinal direction of the sheath tube unit 10. The sheath tube unit 10 is placed on the leveling base 17 by the crane 200 . At this time, since the height of the adjusting bolt 21 of the leveling base 17 is adjusted, the sheath tube unit 10 is placed substantially horizontally on the existing slab 2 . By placing the sheath tube unit 10 on the leveling base 17, the sheath tube 12 corresponding to the existing embedded tube 3 can be fitted from above with extremely high accuracy.

The operation of placing the sheath tube units 10 is sequentially repeated, and the sheath tubes 12 are fitted to all the existing embedded tubes 3 as shown in FIG.
Concrete 23 is further placed on the existing slab 2 to a predetermined height as shown in FIG. By placing the concrete 23, the sheath tube unit 10 is entirely buried in the concrete 23 except for the sheath tube 12 exposed from the concrete 23 by a predetermined length, and the raised hearth bed 1 is completed.

According to the present invention, by using the sheath tube unit 10, the sheath tubes 12 for one furnace are collectively fitted into the existing embedded tube 3 as in the present embodiment, and this work is repeated. can significantly shorten the construction period. The conventional method of installing new embedded pipes one by one requires large-scale equipment. The present invention eliminates such facilities and has the advantage of eliminating the need for welding fixing work after aligning the position of a new embedded pipe.

Although the present invention has been described along with various embodiments, the present invention is not limited to these embodiments, and modifications and the like are possible within the scope of the present invention.
In the present embodiment, an example of the sheath tube unit 10 in which the sheath tubes 12 for one furnace are unitized has been described, but two or more furnaces may be unitized, thereby further shortening the construction period. .

1 hearth bed, 2 existing slab, 3 existing embedded pipe, 10 sheath tube unit, 11 frame, 12 sheath tube, 13 bridge, 14 bracket, 15 welding, 16 hanging member, 17 leveling base, 18 angle steel, 19 Spacer, 20 nut, 21 adjustment bolt, 22 anchor bolt, 100 coke oven, 200 crane.

Claims (7)

A new embedded pipe installation method for installing a new embedded pipe in a hearth bed that is raised in a coke oven,
moving above the existing slab a sheath tube unit formed by unitizing a sheath tube corresponding to a predetermined existing embedded tube embedded in the existing slab,
placing the sheath tube unit on the existing slab and fitting the new embedded pipe to the existing embedded pipe from above;
A method for installing a new embedded pipe, characterized by sequentially placing a plurality of said sheath pipe units on the entire hearth bed to be raised, and placing concrete on said existing slab. 2. The method for installing a new embedded pipe according to claim 1, wherein the sheath pipe unit is leveled when being placed on the existing slab. 3. The sheath pipe unit according to claim 1, wherein the sheath pipe unit is suspended from the vicinity of the existing slab by a crane, moved above the existing embedded pipe, and placed on the existing slab. Installation method for new embedded pipes. 4. The method for installing a new embedded pipe according to any one of claims 1 to 3, wherein the sheath pipe unit is unitized for at least one furnace. A new embedded pipe installation device for installing a new embedded pipe in a hearth bed that is raised in a coke oven,
A sheath tube unit comprising: a frame extending with a length equivalent to the oven length of the coke oven; and a plurality of sheath tubes supported by the frame corresponding to predetermined existing embedded tubes. with
An apparatus for installing a new embedded pipe, wherein a plurality of said sheath pipe units are successively placed on the whole hearth bed to be raised, and concrete is placed on said existing slab. 6. The apparatus for installing a new embedded pipe according to claim 5, further comprising a leveling base for leveling the sheath pipe unit when it is placed on the existing slab. 7. The apparatus for installing a new embedded pipe according to claim 6, wherein a plurality of leveling bases are arranged along the longitudinal direction of the sheath pipe unit.

Images