JP2005291517A - Disassembling method of disposal chimney - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disassembling method of a disposal chimney capable of preventing deterioration in a work environment and an adverse influence on the human body by preventing the scattering of chips, while simply performing cutting work when cutting the chimney. <P>SOLUTION: This method cuts the chimney 1 by a cutter 3 together with a coating material W in a state of coating the inner peripheral wall of the chimney 1 by sticking or filling the coating material W having resiliency, or coating the outer peripheral surface of the chimney 1 with the coating material W. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for disassembling a waste chimney in which the surface of the chimney is covered with a coating material and cut with a cutter.

  Conventionally, when dismantling large chimneys standing in pulp mills, incineration factories and various facilities, they are left in the chimneys against dangerous chimneys that have been left for a long period of time and are not subject to toxic degradation. Cutting is performed after washing with high-pressure water.

In addition, after the cleaning work is completed, the chimney is cut and disassembled by sequentially cutting from above with a cutter using a cutter device as shown in Patent Document 1 in a state where the whole or a cut part is covered with a sheet to form a closed space. Is done.
JP 7-328839 A

  However, the cutting operation in which the chimney is covered with the sheet or inside the sheet has a drawback in that it is difficult to cover the complicated sheet and to handle the cutter in the sheet. In addition, cutting chimneys that are not deteriorated or have no countermeasures against harmful substances are problematic in that it is difficult to prevent the falling of concrete and the scattering of chips containing harmful substances such as dioxins and heavy metals.

  In order to solve the above-described problem, the waste chimney dismantling method firstly covers the inner peripheral wall of the chimney 1 by attaching or filling the coating material W having elasticity, and then cutting the chimney 1 with the cutter 3. It is characterized by that.

  Secondly, the coating material W is coated on the outer peripheral surface of the cut portion of the chimney 1 and cut by the cutter 3.

  Third, the chimney 1 is cut in a direction perpendicular to the axis.

  Fourth, water is supplied to the cutting part of the chimney 1 by the cutter 3, and the chips are mixed with water and collected.

  Fifth, the cutter device 2 is supported on a scaffold 31 assembled around the chimney 1, and the chimney 1 is cut by the cutter 3.

  Sixth, the cutter 3 is a disk-type cutter.

  Seventh, the cutter 3 is a wire saw.

  As described above, according to the present invention, when the chimney is cut, the chimney is cut with the cutter after the inner peripheral wall of the chimney is first coated by attaching or filling the chimney. Can be prevented from splashing outside. Further, by coating and cutting the outer peripheral surface of the cut portion of the chimney with a covering material, it is possible to easily perform the dismantling process that regulates the scattering of chips, noise during cutting, and the like.

Furthermore, by supplying water to a cutting part, cutting | disconnection can be accelerated | stimulated and it can make it easy to collect by mixing chips with water.
Further, by supporting the cutter device on a scaffold assembled and installed in the chimney, it can be easily cut in the direction perpendicular to the axis at each cutting position of the chimney.

  Further, by using the cutter device provided with the belt-type cutter together with the cutter device provided with the disk-type cutter, it is possible to easily perform the dismantling process of the chimney under various cutting conditions.

  Embodiments of the present invention shown in the drawings will be described below. FIG. 1 shows a state of a dismantling operation in which a waste chimney (hereinafter simply referred to as a chimney) 1 is cut using the cutter device 2 shown in FIGS. In addition, the chimney 1 of the example of illustration shows the large-sized chimney which stands in a factory, a plant | facility, etc. which cut | disconnect in the diameter direction for every dismantling length with standing shape, and requires dismantling.

  The operation when disassembling the chimney 1 is performed by first attaching or filling an elastic covering material W such as a synthetic resin material or a foaming agent to the inside of the chimney 1 to cover the inner peripheral surface of the chimney 1. After performing the covering operation, a cutting operation is performed in which the cutter device 2 is positioned at the cutting position of the chimney 1 and the cutter 3 is operated to cut.

  At this time, the cutting position of the cutter 3 is determined at a plurality of points for each dismantling length from the upper part to the lower part of the chimney 1, and the upper cutting chimney part to be cut has a crane vehicle or the like arranged in the vicinity of the chimney 1. The cutting operation is performed in a state of being supported by the support means 5 made of a wire rope or a chuck.

  Therefore, since the cut chimney portion to be cut is cut in a state of being supported in advance by the support means 5, it is possible to prevent the cutting chimney portion from being subjected to the weight of the cut chimney as the cutting proceeds, and to be cut. The portion can be lifted once by the support means 5 and then slowly lowered toward the ground.

  The covering material W used for the dismantling treatment work is preferably a material that is excellent in spraying workability, such as foamed urethane, and has an appropriate elasticity and solid strength at the time of curing and is easy to cut. The construction thickness for attaching urethane foam to the inner peripheral surface of the chimney 1 as the covering material W is a thickness that does not expose the cutting edge of the cutter 3 protruding toward the inner peripheral surface side of the chimney 1 at the time of cutting as shown in FIG. If there is a shortage, blow out urethane foam. Thereby, the tooth tip side of the cutting part can be sealed from the inside, and scattering of chips into the chimney can be prevented.

Furthermore, in the dismantling process as described above, when the cutting operation is performed after the surface coating by means such as blowing urethane foam on the surface side of the chimney 1, scattering on the surface side of the chips can be regulated, In addition, vibration, noise, and the like during cutting can be reduced.
If necessary, the cutting operation of the chimney 1 cut by the cutter 3 is performed while supplying a liquid such as water. Thereby, the cutter 3 and the cutting part are cooled by the liquid to prevent various troubles associated with heating, and the cutting is promoted by preventing scattering of the chips and washing away.

Next, the cutter device 2 suitable for the cutting operation as described above will be described with reference to FIGS. The cutter device 2 includes a drive motor 5 that rotates a disk-shaped cutter 3 and a cutter cover 6 that also serves as a machine frame that attaches and supports the drive motor 5.
The cutter device 2 in the illustrated example is configured to be movably supported by a cutter guide 7 that is detachably wound around the outer periphery of the cutting portion of the chimney 1 and attached and fixed.

  That is, the cutter device 2 is driven around the support portion 8 in a side wall of the cutter cover 6 formed in the shape of a bowl-shaped box so that the center portion of the drive motor 5 is rotatably supported. A rotation motor 9 for rotating the motor 5 is provided.

  In addition, the drive motor 5 is provided with a rotating shaft 10 that detachably attaches and supports the cutter 3 at a position eccentric from the support portion 8 toward the outer periphery of the motor, and the drive gear provided on the rotation motor 9 on the outer periphery of the drive motor 5. 11 is provided. An auxiliary cover 13 that covers the upper part and both sides of the cutter 3 is fixedly attached to the base side of the rotary shaft 10.

  With this configuration, as shown in FIG. 2, the cutter 3 is rotated in the direction of the arrow by the rotation shaft 10 by the drive motor 5. When the rotation motor 9 is driven, the drive motor 5 and the auxiliary cover 13 are engaged with the auxiliary cover 13 via the engagement of the drive gear 11 and the ring gear 12 to switch from the cut state indicated by the solid line to the non-cut state indicated by the dotted line. Can do.

  Further, the cutting depth of the cutter 3 with respect to the chimney 1 can be adjusted by stopping the rotation motor 9 at an arbitrary position during operation. At this time, the auxiliary cover 13 maintains the cover distance from the cutter 3 and swings together with the drive motor 5, so that scattering of chips in the cutter cover 6 is restricted.

  Further, a nozzle portion 15 for supplying liquid to the cutting portion is provided on the front side wall of the cutter cover 6, and a dust suction port 16 connected to a dust suction device (not shown) is provided on the rear side wall to suck both chips and supplied liquid. It is configured to discharge outside the machine.

  Further, on the lower portions of the left and right side walls of the cutter cover 6, the cutter device 2 is supported by the cutter guide 7 so that the cutter device 2 can be guided and moved, an engaging member 20, and a moving motor 21 that moves the cutter device 2 along the cutter guide 7. Is provided.

  The cutter guide 7 includes a mounting plate 23 that can be wound around and fixed to the outer periphery of the chimney 1, a guide rail 26 that runs along both the upper and lower sides of the mounting plate 23, and a traveling movement rail 27. A cutter groove 29 into which the cutter 3 is inserted is formed in the middle part.

  Thus, as shown in FIG. 3, the cutter device 2 engages and supports the engaging portion 20 with the guide rail 26 and moves the traveling wheel 30 having sprocket-like meshing teeth provided on the moving motor 21 in a chain shape. It meshes with the rail 27 and is supported so as to be able to travel with respect to the cutter guide 7.

By using the cutter device 2 configured as described above as follows, it is possible to easily perform the cutting and dismantling work of the chimney 1 particularly in the standing state.
First, the inner peripheral wall is covered with the covering material W, and the cutter guide 7 is attached to the outer peripheral surface of the chimney 1 where the covering material W is coated on the outer peripheral surface of the cutting portion as shown in FIGS. The cutter device 2 is attached to and supported by the guide 7.

  Next, when the cutter device 2 is operated and the cutter 3 is rotated and the cutting depth is adjusted by the rotary motor 9 and the traveling movement is performed, the cutter 3 cuts the chimney 1 from the coated material W as shown in FIG. Then, a part of the covering material W adhered to the inner peripheral wall is cut. Then, as the cutter device 2 sequentially travels, the entire periphery of the chimney 1 is cut in a direction perpendicular to the axis of the chimney 1.

  At this time, the cutter device 2 supplies water from the nozzle portion 15 to the cutting portion to promote cutting, and the water mixes chips such as a chimney material and a covering material generated by the cutting of the cutter 3. Then, the mixed water is sucked from the dust suction port 16 and discharged to the outside of the machine and collected.

  In addition, since the collected mixed water is intensively processed without damaging the environment, even if the chimney is not deteriorated or has no measures against harmful substances, the covering material W covers the deteriorated concrete, and the chips are turned into water. By mixing and collecting, deterioration of the work environment and adverse effects on the human body due to dust and splashes are prevented. Further, even if the chip contains harmful substances such as dioxins and heavy metals, it can be easily recovered, so that environmental pollution can be prevented.

Therefore, the cutter device 2 can perform the cutting work by the cutter 3 hygienically while preventing adverse effects on the surroundings. In addition, when synthetic resin and a paste agent are mixed and supplied to water, when said mixed water dries, it can solidify and dispose without making it powder.
Further, when the cut chimney portion that has been cut is lifted upward by the support means 5, the partially connected covering material W is cut off and can be easily removed from the lower chimney 1. Thereafter, the cut chimney portion is moved to a waste disposal site for post-processing.

  The cutter device 2 capable of performing the above-described cutting operation can also perform the cutting operation of the chimney 1 in a state where the cutter device 2 is supported by the scaffold 31 shown by the dotted line in FIG. 1 assembled around the chimney 1.

  In addition, when providing the guide member which supports the cutter apparatus 2 so that a movement to the perimeter of the chimney 1 is provided with respect to the scaffold 31, installation of the cutter guide 7 with respect to the chimney 1 can be abbreviate | omitted. In this case, the scaffold base 32 that supports the cutter device 2 is preferably configured to be movable up and down with respect to the scaffold column 33.

  2, the cutter device 2 is provided with a groove seal device 36 that feeds and closes the adhesive groove 35 on the cutting groove formed by the cutter 3 on the upper side in the cutting movement direction. Can do. In this case, it is possible to easily regulate the leakage of chips that are about to be discharged from the cutting groove that communicates with the cutter cover 6.

  Next, another embodiment of the cutter device 2 shown in FIGS. 5, 6, 7, and 8 will be described. In addition, description is abbreviate | omitted about the structure similar to the cutter apparatus 2 of the said 1st Embodiment. The cutter apparatus 2 of 2nd Embodiment shown in FIG.5, FIG.6 is set as the structure which covers only the cutter 3 side with the cutter cover 6, exposes the drive motor 5, and promotes heat dissipation.

  That is, the cutter device 2 in the illustrated example supports the drive motor 5 so as to be movable up and down on the machine frame 37 having the cutter cover 6, and the metal portion of the rotary shaft 10 can be inserted and moved into the long hole 39 formed in the cutter cover 6. Forming. The auxiliary cover 13 covering the cutter 3 is fixedly attached to the metal part in the cutter cover 6.

  The cutter device 2 of the third embodiment shown in FIGS. 7 and 8 is a belt-type cutter made of a Yayer saw or the like that rotates while being cut around the chimney 1, and is provided on the body frame 37. ing. In the illustrated example, the band-shaped or string-shaped cutter (hereinafter referred to as cutter wire) is configured by, for example, attaching diamond grains to the surface of the wire.

The cutter wire 3 is wound around the pulley 5 a of the drive motor 5 that is screwed and supported by a screw rod 50 provided along the body frame 37, with the other of the cutter wire 3 fitted and wound around the chimney 1.
Further, in this state, the middle portion of the cutter wire 3 is stretched by tension pulleys 52 and 52 that are screwed and supported by screw rods 51 and 51 that are provided laterally on the machine body frame 37. The cutter cover 6 constitutes a body frame 37 and attaches and supports the screw rods 50, 51, 51, and is formed in a funnel shape on the lower side to collect chips.

  When the adjusting motor 53 that attaches and supports the screw rod 50 is rotated in the forward direction, the cutter device 2 configured as described above moves the drive motor 5 in the direction of the arrow and stretches the cutter wire 3 via the pulley 5a to transmit the rotation. When the adjusting motors 55 and 55 for attaching and supporting the screw rods 51 and 51 are rotated forward, the cutter wire 3 can be tensioned and adjusted via the tension pulleys 52 and 52.

  When the drive motor 5 is driven in this state, the cutter wire 3 rotates and cuts the outer peripheral surface of the chimney 1, and the adjustment motors 53, 55, 55 are rotated forward according to the amount of cutting, and cutting is continued while the cutter wire 3 is squeezed. Thus, the chimney 1 can be easily cut in the diameter direction.

  Further, when the adjusting motors 53, 55, 55 are reversed, the cutter wire 3 that has been cut and loosened can be further loosened. When the cutter device 2 is moved to the lower cutting position, the cutter wire 3 is greatly expanded. Thus, it can be easily inserted into the chimney 1, and the recutting work by the cutter wire 3 can be performed efficiently.

The cutter device 2 configured as described above and capable of cutting the chimney 1 can cut the chimney 1 in a ring shape with respect to the shaft center in a fixed posture that does not move the cutter device 2 in the circumferential direction.
Therefore, when the cutter device 2 that can move in the circumferential direction is used together with the chimney 1 that is obstructed by an obstacle and cannot be cut, the chimney 1 that includes the belt-type cutter is used to cut and dismantle the chimney under various conditions. Can do. In addition, the chimney 1 that has been laid down in advance can be easily cut.

It is a work figure which shows an example of the dismantling operation | work which cut | disconnects a chimney with a cutter apparatus by the dismantling processing method of this invention. It is a plane sectional view which shows the structure of the cutter apparatus of FIG. FIG. 3 is a front sectional view of FIG. 2. FIG. 3 is a side sectional view of FIG. 2. It is a plane sectional view showing the composition of the cutter device of a 2nd embodiment. FIG. 5 is a front sectional view of FIG. 4. It is a top view which shows the structure of the cutter apparatus of 3rd Embodiment. FIG. 8 is a front sectional view of FIG. 7.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chimney 2 Cutter apparatus 3 Cutter 5 Drive motor 6 Cutter cover 7 Cutter guide 15 Nozzle part 31 Scaffold

Claims (7)

  A method for disassembling a waste chimney in which the inner peripheral wall of the chimney (1) is coated or adhered with a covering material (W) having elasticity, and then the chimney (1) is cut with a cutter (3).   The method for disassembling a waste chimney according to claim 1, wherein a coating material (W) is coated on the outer peripheral surface of the cut portion of the chimney (1) and cut by the cutter (3).   The method for disassembling a waste chimney according to claim 1 or 2, wherein the chimney (1) is cut in a direction perpendicular to the axis.   The method for disassembling a waste chimney according to claim 1, 2 or 3, wherein water is supplied to a cutting portion of the chimney (1) by the cutter (3), and chips are mixed with water and collected.   Dismantling of the waste chimney according to claim 1 or 2, or 3 or 4, wherein the cutter device (2) is supported on a scaffold (31) assembled around the chimney (1) and the chimney (1) is cut by the cutter (3). Processing method.   The method for disassembling a waste chimney according to claim 1, wherein the cutter (3) is a disk-type cutter.   The method for disassembling a waste chimney according to claim 1, 2, 3, 4 or 5, wherein the cutter (3) is a wire saw.

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