JP4182252B2 - Removal device and method for removing lining layer of fire wall - Google Patents

Description

  The present invention relates to an apparatus and method for removing a lining layer of a fire wall having a predetermined thickness coated on the inner wall surface of a furnace or a chimney cylinder, and more specifically, while suppressing generation of dust in consideration of environmental problems. The present invention relates to a technology that enables safe, efficient and quick removal with noise.

  Conventionally, repair of a deteriorated lining layer has been done by using an equipment such as a wheel cutter or an air breaker, where an operator gets on a workbench such as a gondola that lifts and lowers the furnace or chimney with a wire rope using a winch installed on the ground. The lining layer is crushed and removed, and a new lining is sprayed after removal.

  By the way, in the above-described method, a large vibration is transmitted to the worker and a large noise is generated. Further, the lining layer to be crushed and removed has a large and small shape and is scattered around the worker to generate a large amount of dust, which is dangerous and the working environment is extremely bad.

Thus, a chimney lining layer repair device for improving the working environment has been developed (see, for example, Patent Document 1). This repair device is equipped with a rotating cutter on the device base that turns on the gondola along the chimney inner periphery, and forms a grid-like kerf so that the lining layer is partitioned into a rectangular shape with the rotating cutter while turning the device base. The lining layer can be easily disassembled. This invention develops the apparatus and construction method which can remove the lining layer divided by the kerf with the said repair apparatus more efficiently and rapidly.
JP-A-6-235512

  The problem to be solved by the present invention is to solve the above-mentioned conventional problems, and to suppress the generation of dust and to remove the lining layer safely and promptly with low noise while considering the environmental problem. It is in providing a removal apparatus and a removal construction method.

The configuration of the present invention that solves this problem is as follows.
1) Removing the refractory lining layer of the refractory wall, separating the refractory lining layer of the refractory wall into a plurality of small lining layers by kerfs, and separating the metal brackets attached to the two adjacent small lining layer surfaces separately. A device,
A metal bracket fixed to the surface of the small lining layer by an anchor bolt, and a peeling cylinder for separating the metal bracket;
The metal bracket includes an engaging portion that engages with a case or an end portion of a peeling cylinder, a connecting portion that connects to a cargo handling tool suspended from above, and the anchor bolt is applied to the small lining layer. The apparatus for removing the lining layer of the fire wall, characterized by comprising a mounting portion for detachably mounting the driving cylinder to be inserted 2) The metal bracket and the peeling cylinder are suspended at substantially the same height. The apparatus for removing a lining layer of a fireproof wall according to claim 1, further comprising a cargo handling tool, wherein the contact surface of the metal bracket with the small lining layer has substantially the same curvature as the inner surface of the small lining layer. 3. The apparatus for removing a lining layer of a fireproof wall according to claim 1 or 2, wherein the peeling cylinder and the placing cylinder are shared, and a metal bracket is provided on the placing cylinder. Mounting part The apparatus for removing a lining layer of a fire wall according to any one of claims 1 to 3, wherein a fitting jig to be engaged and a driving portion for driving the tip of the anchor bolt are detachably attached. A step of forming a plurality of small lining layers by partitioning the refractory lining layer coated on the inner wall surface of the refractory wall with a groove having a predetermined depth;
Forming a perforation in the surface of the adjacent small lining layer and fixing the anchor bolt; fixing the metal bracket with the anchor bolt; and fixing the peeling cylinder between the metal brackets;
A method for removing a lining layer of a fireproof wall, comprising: fixing a driving cylinder to the metal bracket and driving the anchor bolt into a small lining layer. 6) 6. The method for removing a lining layer of a fireproof wall according to claim 5, wherein the lining layer is suspended by a cargo handling tool suspended from above and the small lining layer peeled off together with the metal bracket is suspended and removed.

  According to the present invention, the metal bracket fixed to the partitioned small lining layer is peeled off while being pushed and shifted by the peeling cylinder, so compared with the conventional method of crushing and removing with a striking force such as a wheel cutter or an air breaker. Vibration and noise are remarkably reduced, and a predetermined area can be surely removed in units of sections. Moreover, since there is little scattering of small pieces of the lining layer, it is safe and generates almost no dust, and it can be repaired efficiently and quickly with low noise. Can be done.

  Further, since the metal bracket of the present invention has an engaging portion for engaging the end of the peeling cylinder case and the rod on the left and right, the peeling cylinder does not deviate from the metal bracket when pressed. Can be peeled off. Further, since the mounting cylinder is provided with a mounting portion for detachably mounting the placing cylinder via a mounting jig, the anchor bolt can be embedded in the small lining layer accurately and with low noise to fix the metal bracket.

  The metal bracket of the present invention can be fixed to each of two adjacent small lining layer surfaces or every other one, etc., and is selected according to the size of the small lining layer, the size of the cylinder, and the stroke. . The cylinder may be prepared separately for peeling and for placing, or may have a structure that can be shared. There are also hydraulic, pneumatic, electric, etc., which are arbitrarily selected.

  As a peeling method of the small lining layer, a method of peeling and removing the small lining layer in the direction of the area where there is no open lining layer, or peeling the small lining layer by shifting the groove width of the kerf There is. The groove width of the kerf is generally 4 to 10 mm, but if the groove width is 4 to 5 mm, it can be reliably peeled off. In addition to the up / down / left / right direction, the peeling direction includes a pattern in which the direction is changed during the operation. There are a case where the kerf is formed so as to be partitioned in a lattice shape, and a case where the kerf is formed so as to be partitioned in a plurality of directions in one direction, up and down or left and right. Further, when it is difficult to shift the small lining layer, such as first and last peeling, it may be performed manually as usual.

  When the fire wall is a cylinder with a chimney, a work table such as a gondola is provided in the chimney, a cylinder operating device for extending and retracting the cylinder is provided on the work table, and the peeling work is performed on the work table. When a guide rail in the circumferential direction is installed above the outer peripheral end of the workbench, a cargo handling tool is suspended on the guide rail so that it can travel, and the metal bracket and the peeling cylinder are suspended at substantially the same height by the cargo handling tool. In addition to facilitating the installation work of the metal bracket and the peeling cylinder, it is safe to prevent the apparatus and the peeled small lining layer from falling or scattering due to the impact of peeling. Embodiments of the present invention will be specifically described below with reference to the drawings.

  The example shown in FIGS. 1-10 is an example which applied this invention to peeling of the fireproof lining layer of a chimney. 1 is a perspective view of the front side of the metal bracket of the embodiment, FIG. 2 is a perspective view of the back side of the embodiment, FIG. 3 is an explanatory view showing raising and lowering of the gondola of the embodiment, and FIG. Fig. 5 is a side view of the gondola of the embodiment, Fig. 6 is a side view of the cargo handling device of the embodiment, Fig. 7 is a cross-sectional view showing fixing of the metal bracket of the embodiment, and Fig. 8 is an A- A sectional view, FIG. 9 is explanatory drawing which shows peeling of the small lining layer of an Example, FIG. 10 is explanatory drawing which shows the peeling order of the small lining layer of an Example.

  As shown in FIGS. 1 and 2, the metal bracket 1 according to the first embodiment forms a cylinder engagement recess 2 that engages with the case of the peeling cylinder 18 or the end of the rod on the left and right sides. A bolt retaining groove 3 is formed in which an anchor bolt 20 projecting from the small lining layer 12b is fitted and secured, and the anchor bolt 20 is pressed and fixed to the small lining layer 12b inside the metal bracket 1. A cylinder mounting recess 4 is formed to detachably mount a driving cylinder 19 from above via a mounting jig 19a, and the metal bracket 1 is suspended from the upper back side of the metal bracket 1 from above. An eyebolt 5 that is a connecting portion to be connected to the cargo handling tool 14 is screwed, and a curved surface portion 1 a having the same curvature as the inner surface of the lining layer 12 is formed on the back surface of the metal bracket 1.

  As shown in FIG. 3, a circular gondola 13 as a work table is connected to a gondlauinch (not shown) on the ground by a wire rope 15 and suspended in the chimney 10 so that it can be raised and lowered. The wire rope 15 is supported by being changed in direction by a gondola arm 16 and a turning sheave 17 at the upper end of the chimney 10 and fixed to the ground G by a gondro inch and an anchor weight (not shown).

  As shown in FIGS. 4 to 6, the gondola 13 has a circumferential hanger rail 13a divided into eight bodies above the outer peripheral end thereof, and is constructed by a plurality of L-shaped support pillars 13b. A cargo handling device 14 provided with a hanger single wheel 13c is suspended from the rail 13a so as to be able to travel, and a wire 14b provided with a swivel snap 14a is suspended from the cargo handling device 14. The support column 13b is arranged on the inner side, the cargo handling tool 14 is suspended on the outer side, and is brought close to the lining layer 12 so that the suspension is stable.

  First, in the repair device disclosed in Japanese Patent Laid-Open No. 6-235512, grooves 12a having a groove width of 5 mm are formed in a lattice shape on the deteriorated lining layer 12 of the chimney 10 and divided into small lining layers 12b having a size of 300 × 600 mm. . At this time, if there is a wire mesh or a reinforcing bar in the lining layer 12, it is cut together. Next, as shown in FIGS. 7 and 8, the surface of the small lining layer 12b to be peeled off and the surface of the adjacent small lining layer 12b are drilled, and anchor bolts 20 are temporarily fixed. The metal bracket 1 thus fitted is inserted into the bolt retaining groove 3 and the fixing position is adjusted up and down with the bolt retaining groove 3 as necessary, and is mounted in the cylinder mounting recess 4 via the mounting jig 19a. The anchor bolt 20 temporarily fixed by the driving cylinder 19 is driven to fix the metal bracket 1 to the small lining layer 12b, and the driving portion 19b for driving the tip of the anchor bolt 20 is attached to the driving cylinder 19.

  As shown in FIG. 9A, the case end of the peeling cylinder 18 connected to a hydraulic device (not shown) is engaged with one cylinder engaging recess 2 of each metal bracket 1 with the lateral direction and a wire. The rod is suspended at 14b, and the hydraulic device is operated to slowly extend the rod of the peeling cylinder 18. As shown in FIG. 9B, the pressing force of the peeling cylinder 18 presses each metal bracket 1 in the separating direction, and one of the small lining layers 12 b to which the metal bracket 1 is fixed serves as the lining layer 12. It deviates in the direction of the region without any gap and gradually peels off from the cylinder 11a. At this time, even if there is no region without the lining layer 12, if the groove width of the kerf 12a is about 4 to 5 mm, it is peeled off. The stud bolt 21 is also broken at the same time by a shearing force. Although the metal bracket 1 and the peeling cylinder 18 try to scatter due to the impact of the peeling, the metal bracket 1 and the peeling cylinder 18 are safe because they are suspended by the cargo handling tool 14.

  When the small lining layer 12b is completely detached from the cylinder 11, the peeled small lining layer 12b is transported to the predetermined position along the hanger rail 13a by the cargo handling tool 14, and the metal bracket 1 is removed to remove a crusher (not shown). Crush with a crusher.

  Subsequently, the removed metal bracket 1 is perforated on the surface of the small lining layer 12b adjacent to the opposite small lining layer 12b and fixed with the anchor bolt 20, and the peeling cylinder 19 extended by the previous peeling is attached. It retracts and arranges between the metal brackets 1 and operates the hydraulic device to extend the peeling cylinder 19 again. The small lining layer 12b located on the peeling trace 12c side is laterally displaced in the direction of the peeling trace 12c by the pressing force of the peeling cylinder 19 and peels off, and the metal bracket 1 is removed after the conveyance in the same manner as before, and is crushed.

  Thereafter, this series of steps is repeated as necessary as shown in FIG. 10, and the repair is completed by spraying a new lining on the removal trace. If the repair site covers the entire surface, it will be removed repeatedly from the top to the bottom.

  The present invention can be applied not only to the lining layer of a chimney or the lining layer of a fireproof wall of a furnace such as a thermal power plant, an ironworks, or an incinerator, but also to peeling of the outer wall of a building.

It is a perspective view of the front side of the metal bracket of an Example. It is a perspective view of the back side of the metal bracket of an Example. It is explanatory drawing which shows raising / lowering of the gondola of an Example. It is a top view of the gondola of an Example. It is a side view of the gondola of an Example. It is a side view of the material handling implement of an Example. It is sectional drawing which shows fixation of the metal brackets of an Example. It is AA sectional drawing of FIG. It is explanatory drawing which shows peeling of the small lining layer of an Example. It is explanatory drawing which shows the peeling order of the small lining layer of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Metal bracket 1a Curved surface part 2 Cylinder engagement recess 3 Bolt latching groove 4 Cylinder mounting recess 5 Eye bolt 10 Chimney 11 Cylindrical body 12 Lining layer 12a Cut groove 12b Small lining layer 13 Gondola 13a Hanger rail 13b Post 13c Hanger DESCRIPTION OF SYMBOLS 14 Load-handling tool 14a Swivel snap 14b Wire 15 Wire rope 16 Gondola arm 17 Turning sheave 18 Peeling cylinder 19 Placing cylinder 19a Mounting jig 19b Placing part 20 Anchor bolt 21 Stud bolt G Ground

Claims (6)

A fire wall lining layer removal device that divides a fire wall of a fire wall into a plurality of small lining layers by kerfs, and separates the metal brackets attached to the surfaces of two adjacent small lining layers to separate them. There,
A metal bracket fixed to the surface of the small lining layer by an anchor bolt, and a peeling cylinder for separating the metal bracket;
The metal bracket includes an engaging portion that engages with a case or an end portion of a peeling cylinder, a connecting portion that connects to a cargo handling tool suspended from above, and the anchor bolt is applied to the small lining layer. An apparatus for removing a lining layer of a fire wall, comprising: a mounting portion for detachably mounting a driving cylinder to be inserted.   The apparatus for removing a lining layer of a fire wall according to claim 1, further comprising a cargo handling tool for suspending the metal bracket and the peeling cylinder at substantially the same height.   The apparatus for removing a lining layer of a fireproof wall according to claim 1 or 2, wherein a contact surface of the metal bracket with the small lining layer is formed into a curved surface having substantially the same curvature as the inner surface of the small lining layer.   The peeling cylinder and the driving cylinder are shared, and a mounting jig for engaging the mounting portion of the metal bracket with the driving cylinder and a driving portion for driving the tip of the anchor bolt are attached and detached. The apparatus for removing a lining layer of a fireproof wall according to any one of claims 1 to 3, wherein the lining layer is attached in a possible manner. A step of forming a plurality of small lining layers by partitioning the refractory lining layer coated on the inner wall surface of the refractory wall with a groove having a predetermined depth;
Forming a perforation in the surface of the adjacent small lining layer and fixing the anchor bolt; fixing the metal bracket with the anchor bolt; and fixing the peeling cylinder between the metal brackets;
A method for removing a lining layer of a fireproof wall, comprising: a step of fixing a driving cylinder to the metal bracket and driving the anchor bolt into a small lining layer.   6. The removal of the lining layer of the fireproof wall according to claim 5, wherein the metal bracket is suspended by a cargo handling tool suspended from above, and the small lining layer peeled off together with the metal bracket is suspended and removed. Construction method.

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