JP4408695B2 - Cylindrical structure cleaning apparatus and cleaning method - Google Patents

Description

  The present invention relates to a cleaning device and a cleaning method for a cylindrical structure, and more particularly to a cleaning device and a cleaning method for a cylindrical structure that cleans the inner wall of the cylindrical structure such as a chimney or a sewer pipe.

  In general, in a cleaning factory or the like, dioxins adhere to the inner wall of the chimney, and therefore, when the cleaning factory or the like is dismantled, the dismantled concrete pieces and the like are treated as industrial waste.

  For this reason, it is possible to remove harmful substances contained in the incineration ash adhering to the chimney when incineration of waste, etc. in a safe situation and to make it harmless, to dismantle the chimney efficiently and safely, and to recycle these demolition materials A chimney dismantling system for a waste incineration facility is provided (see Patent Document 1).

This waste incineration plant chimney dismantling system cleans the incineration ash adhering to the inner wall surface by injecting high-pressure water while adjusting the position from the main body suspended in the chimney from the top of the chimney toward the inner wall surface of the chimney It is supposed to be removed.
JP 2003-240225 A

  In the above-described chimney dismantling system, high pressure water jetting means jets high pressure water toward the inner wall surface of the chimney to clean and remove the incineration ash adhering to the inner wall surface. Although the incineration ash on the wall surface can be removed by washing, if dioxins permeate inside the inner wall, they cannot be completely removed, leaving the permeated dioxins. In the state, there is a problem that the dismantling material cannot be recycled.

  In addition, there is a problem that the injection range for the inner wall surface of the high-pressure water injected from the high-pressure water injection means is narrow, and it takes time for cleaning, long construction time, inefficiency, and costs.

  It is an object of the present invention to provide a cylindrical structure cleaning apparatus and cleaning method that can efficiently remove pollutants efficiently, in a short time and at low cost.

  Another object of the present invention is to provide a cleaning device and a cleaning method for a cylindrical structure that can more reliably cope with a change in the inner diameter of the cylindrical structure.

In order to achieve the above object, the cylindrical structure cleaning apparatus of the present invention is insertable into a cylindrical structure and is extendable and contractible in the radial direction of the cylindrical structure. A first expansion / contraction means that is capable of following the inner diameter of the cylindrical structure and is fixed in a radial direction with respect to the cylindrical structure;
A second telescopic means that is extendable in the radial direction of the cylindrical structure and is rotatably attached to the first elastic means;
Moving means for allowing the first expanding and contracting means and the second expanding and contracting means to move in the axial direction of the cylindrical structure;
Rotational movement means for rotationally moving the second expansion / contraction means along the inner periphery of the cylindrical structure;
Interlocking means for expanding / contracting the second expansion / contraction means according to expansion / contraction of the first expansion / contraction means;
A plurality of nozzles attached to an outer peripheral position of the second expansion and contraction means and positioned at a predetermined distance from the inner wall of the cylindrical structure by the expansion and contraction of the second expansion and contraction means; An abrasive that supplies a high-pressure cleaning liquid mixed with an abrasive and injects the high-pressure cleaning liquid from the nozzle onto the inner wall of the cylindrical structure so that the inner wall of the cylindrical structure can be suspended at a predetermined depth. Jet means;
Rocking means for allowing the nozzles to rock in the axial direction of the cylindrical structure;
I have a,
The second expansion / contraction means expands only the second expansion means while maintaining the expansion state by the first expansion / contraction means in a state of being expanded in conjunction with the first expansion / contraction means by the interlocking means, Or it has the independent expansion-contraction drive means which enables contraction from this expansion | extension state, It is characterized by the above-mentioned.

The cylindrical structure cleaning method of the present invention is a cylindrical structure cleaning method for performing suspension cleaning of the inner wall of the cylindrical structure using the above-described cleaning device,
Detecting the penetration of contaminants into the inner wall of the cylindrical structure;
A step of bringing the first expansion / contraction means into contact with an inner wall of the cylindrical structure and expanding / contracting the first expansion / contraction means according to an inner diameter of the cylindrical structure;
The second expansion / contraction means supporting the plurality of nozzles positioned at a predetermined distance with respect to the inner wall of the cylindrical structure is expanded / contracted in conjunction with the expansion / contraction operation of the first expansion / contraction means by the interlocking means, While adjusting the position of the nozzle with respect to the inner wall of the cylindrical structure, the second expansion / contraction means is rotated along the inner periphery of the cylindrical structure, and the swinging means While oscillating the nozzle in the axial direction, a high-pressure cleaning liquid mixed with an abrasive from the nozzle is sprayed onto the inner wall of the cylindrical structure by the abrasive jet means, and the detected permeability of the contaminants is increased. Suspending the inner wall of the cylindrical structure at a predetermined depth in accordance with the step of removing the contaminated portion;
Moving the first telescopic means and the second telescopic means in the axial direction of the cylindrical structure by the moving means to move the nozzle in the axial direction of the cylindrical structure;
When the inner diameter of the cylindrical structure is different between the position of the first expansion / contraction means and the position of the second expansion / contraction means, the interlocking means maintains the extended state in conjunction with the first expansion / contraction means. In this state, the independent expansion / contraction driving means provided in the second expansion / contraction means expands only the second expansion / contraction means, or contracts the second expansion / contraction means by expanding / contracting the second expansion / contraction means. Moving to the injection position to the inner wall of the corresponding position;
It is characterized by including.

  According to these inventions, a high-pressure cleaning liquid in which abrasive is mixed from the nozzle is sprayed from the abrasive jet means onto the inner wall of the cylindrical structure, and the inner wall of the structure has a predetermined depth according to the degree of contamination penetration. By removing the contaminated portion, the contaminant can be removed reliably and completely, and the nozzle for injecting the cleaning liquid is swung in the axial direction of the cylindrical structure, so that the cylindrical structure The spraying range of the cleaning liquid to the inner wall of the can is expanded, and cleaning can be performed efficiently, in a short time and at low cost.

Further , the second expansion / contraction means is expanded / contracted independently of the first expansion / contraction means by the independent expansion / contraction drive means, so that the inner diameter of the cylindrical structure becomes the position of the first expansion / contraction means and the position of the second expansion / contraction means. Even if it is different, the change of the inner diameter of the cylindrical structure can be dealt with more reliably, and the contaminants can be removed more reliably and completely.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1-6 is a figure which shows the washing | cleaning apparatus of the cylindrical structure which concerns on one embodiment of this invention.

  FIG. 1 is an overall schematic view showing a state in which deposits contaminated with dioxins are removed before dismantling in a demolition work in a cleaning factory. The inner wall of a chimney 12 that is a cylindrical structure is removed using a cleaning device 10. I try to wash it.

  The cleaning device 10 is suspended from above the chimney 12 and inserted into the chimney 12, and the inner wall of the chimney 12 is cleaned from above to below.

  Cleaning by the cleaning device 10 is performed by the abrasive jet means 14.

  The abrasive jet means 14 supplies the cleaning liquid mixed with the abrasive to the nozzle 18 attached to the cleaning device 10 from the abrasive jet pump 16, and jets a high-pressure cleaning liquid from the nozzle 18 to the inner wall of the chimney 12 to thereby inject the inner wall of the chimney 12. The inner wall is washed at a predetermined depth.

  The cleaning liquid after cleaning is purified through the purification processing unit 20 and then supplied again to the nozzle 18 by the abrasive jet pump 16 to be reused.

  The purification processing unit 20 takes out the washed cleaning liquid collected at the bottom of the chimney 12 to the raw water layer 24 by the pump 22 and sends the cleaning liquid in the raw water layer 24 to the precipitation processing layer 28 by the pump 26. At 28, a flocculant is added to forcibly precipitate contaminants, and the supernatant liquid is taken out to the storage tank 30 and supplied from the storage tank 30 to the abrasive jet pump by the pump 32.

  Dioxin, which is a contaminant, does not melt in the cleaning liquid, for example, water, so that the supernatant liquid is not contaminated by the forced precipitation treatment in the precipitation treatment layer 28 and can be reused.

  As the precipitation processing layer 28, for example, thickener can be used.

  Moreover, since the chimney 12 has a cylindrical shape with a taper whose diameter decreases from the bottom to the top, the cleaning device 10 can follow the inner diameter of the chimney 12.

  Details of the cleaning apparatus 10 will be described with reference to FIG.

  The cleaning apparatus 10 includes a first expansion / contraction means 34, a second expansion / contraction means 36, a movement means 38, a rotation movement means 40, an interlocking means 42, an abrasive jet means 14, an oscillating means 44, Independent stretching means 45.

  The first expansion / contraction means 34 can be inserted into the chimney 12 and can be expanded / contracted in the radial direction of the chimney 12. As shown in FIG. Are supported at intervals of 90 °.

  Each telescopic arm 48 is in a state in which a pair of arms 46 a and 46 b are rotatably connected at the center position, and the base end of one arm 46 a is rotatably attached to an attachment piece 52 fixed to the support tube 50. The base end of the other arm 46b is rotatably attached to a slide member 54 fitted to the support cylinder 50.

  The other end of one arm 46 a is rotatably attached to the upper end of the connecting arm 56, and the other end of the other arm 46 b is slidably and rotatably attached to the lower end of the connecting arm 56. .

  Rollers 58 are attached to the upper and lower ends of the connecting arm 56 so as to be able to come into contact with the inner wall of the chimney 12. The rollers 58 allow the first telescopic means 34 to move in the chimney 12 in the axial direction. The first expansion means 34 is fixed in the radial direction by preventing rotation around.

  An expansion / contraction driving means 60 such as a hydraulic cylinder is provided between the mounting piece 52 and the slide member 54, and the expansion / contraction arm 48 can be expanded and contracted by the driving of the expansion / contraction driving means 60 to follow the change in the inner diameter of the chimney 12. It is like that.

  The second expansion / contraction means 36 is extendable in the radial direction of the chimney 12 and is rotatable with respect to the first expansion / contraction means 34. The second expansion / contraction means 36 penetrates through the support cylinder 50 from the lower end of the support cylinder 50. As shown in FIG. 5, two telescopic arms 64 are supported on the outer periphery of the projecting rotating shaft 62 at intervals of 180 °.

  Each of the telescopic arms 64 has substantially the same configuration as that of the first telescopic means 34, and the base end of one arm 46a of the pair of arms 46a and 46b that are rotatably connected at the central position is a rotation axis. A base piece of the other arm 46 b is rotatably attached to a slide member 66 fitted to the support tube 50.

  The other end of one arm 46 a is rotatably attached to the upper end of the connecting arm 56, and the other end of the other arm 46 b is slidably and rotatably attached to the lower end of the connecting arm 56. Yes.

  The moving means 38 allows the first expanding / contracting means 34 and the second expanding / contracting means 36 to move in the axial direction (vertical direction) of the chimney 12, and the support cylinder 50 is suspended by a wire 68 by a winch or the like. The first expansion means 34 and the second expansion means 36 are suspended and supported so as to be movable in the axial direction.

  The rotational movement means 40 is for rotating the second expansion / contraction means 36 along the inner circumference of the chimney 12, and is provided by a hydraulic motor 72 connected to the rotation shaft 62 via gears 70a and 70b at the upper end of the rotation shaft 62. The second expansion / contraction means 36 can be rotated by rotationally driving the rotary shaft 62.

  The hydraulic motor 72 is capable of forward and reverse rotation, and a forward / reverse rotation angle proximity sensor 74 is provided above the gear 70b. The rotation angle of the hydraulic motor 72 is detected by the rotation angle proximity sensor 74. Is rotated forward and backward every 180 °.

  The interlocking means 42 expands / contracts the second expansion / contraction means 36 in accordance with the expansion / contraction of the first expansion / contraction means 34, and includes a slide member 54 on the first expansion / contraction means 34 side and a slide on the second expansion / contraction means 36 side. By connecting the member 66 with a connecting rod, the first expansion / contraction means 34 and the second expansion / contraction means 36 can be interlocked.

  The abrasive jet means 14 has a plurality of, for example, two nozzles 18 attached to the outer peripheral position of the second extendable means 36, specifically, the lower end of the connecting arm 56 of each extendable arm 64 with the nozzle tip facing outward, A high-pressure jet hose 75 from the abrasive jet pump 16 is connected to the nozzle 18, and the tip of the nozzle 18 is positioned with a predetermined distance from the inner wall of the chimney 12 by the expansion / contraction of the second expansion / contraction means 36.

  With the rotation of the second expansion / contraction means 36, a high-pressure cleaning liquid mixed with an abrasive from each nozzle 18 is sprayed onto the inner wall of the chimney 12, so that the inner wall of the chimney 12 is brought to a predetermined depth. Yes.

  The swinging means 44 enables each nozzle 18 to swing in the axial direction of the chimney 12. Each nozzle 18 is attached to the connecting arm 56 so as to be rotatable in the axial direction of the chimney 12, and The nozzle 18 is oscillated by connecting the nozzle 18 with an oscillating link 78 so that the washing water injection range from the nozzle 18 is expanded.

  The independent expansion / contraction drive means 45 expands / contracts the second expansion / contraction means 36 independently of the expansion / contraction operation of the first expansion / contraction means 34, and is between the interlocking means 42 and the slide member 66 of the second expansion / contraction means 36. For example, a hydraulic cylinder is attached, and the slide member 66 is lowered and raised by the independent expansion / contraction drive means 45 so that the second expansion / contraction means 36 is expanded / contracted independently of the first expansion / contraction means 34. ing.

  By doing so, it is possible to easily cope with the case where the inner diameter of the chimney 12 is different between the position of the first expansion / contraction means 34 and the position of the second expansion / contraction means 36 or the case where the inner wall of the chimney 12 is uneven. be able to.

  In the figure, reference numeral 80 denotes a hydraulic hose, and 82 denotes an electric cable. These are configured so that the rotary shaft 62 is hollow and disposed in the hollow portion.

  Next, a chimney cleaning method using such a cleaning apparatus 10 will be described with reference to FIGS.

  First, when the inner diameter of the chimney 12 is relatively small, as shown in FIG. 3, an extension arm 48 including a pair of arms 46a and 46b is used for the first extension means 34 and the twenty-second extension means 36.

  In cleaning, first, the degree of penetration of contaminants such as dioxin into the inner wall of the chimney 12 is detected.

  In this case, for example, the wall of the chimney 12 is cut to take out a cylindrical core, the core is sliced at a pitch of 5 mm from the inner wall side, the surface is scraped off, and the scraped powder is inspected to detect the permeability. .

  Next, the cleaning device 10 is inserted into the chimney 12 from above by the moving means 38 such as a winch.

  In this case, the first expansion / contraction means 34 and the second expansion / contraction means 36 are in a contracted state.

  Next, the first expansion / contraction means 34 is extended by the expansion / contraction driving means 60, the roller 58 at the tip is brought into contact with the inner wall of the chimney 12, and the first expansion / contraction means 34 is fixed in the radial direction according to the inner diameter of the chimney 12.

  With the extension operation of the first expansion / contraction means 34, the second expansion / contraction means 36 extends toward the inner wall of the chimney 12 via the interlocking means 42, and the roller 58 of the first expansion / contraction means 34 moves to the inner wall of the chimney 12. The tip of each nozzle 18 attached to the outer peripheral position of the second expansion / contraction means 36 is positioned with a predetermined distance with respect to the inner wall of the chimney 12.

  Next, the first expansion / contraction means 34 is rotated and moved along the inner circumference of the chimney 12 by the rotational movement means 40, and the nozzle 18 is swung in the axial direction of the chimney 12 by the rocking means 44, and the abrasive jet is moved. A high-pressure cleaning liquid in which abrasive is mixed is supplied from the abrasive jet pump 16 to the nozzle 18 by the means 14, and the cleaning liquid is sprayed from the nozzle 18 to the inner wall of the chimney 12, and a predetermined depth corresponding to the detected penetration degree of contaminants. Now, the inner wall of the chimney 12 is grabbed to remove the contaminated part.

  In this case, since the nozzle 18 performs forward / reverse rotation every 180 ° by the rotational movement means 40, the nozzle 18 can be reliably suspended in the circumferential direction, and the nozzle 18 swings at a predetermined angle by the swinging means 44. Compared with the case where the nozzle 18 is fixed, a wide range of suspension can be efficiently performed in the axial direction.

  The distance between the tip of the nozzle 18 and the inner wall of the chimney 12 is about 10 cm to 30 cm, preferably about 15 cm to 25 cm.

  Next, when the first round of suspension is completed, the cleaning device 10 is lowered by the suspension width by the moving means 38, the next suspension is performed, the first expansion / contraction means 34 is slightly extended, and this state is sequentially repeated. From the vicinity of the upper end of the chimney 12 shown in FIG. 3A to the vicinity of the bottom of the chimney 12 shown in FIG.

Here, for example, when the separation distance is 20 cm, the swinging swing width is 10 cm, the maximum discharge pressure of the abrasive jet pump 16 is 60 MPa, the nozzle moving speed is 3.0 m / min, the nozzle slide width is 5 cm, and the lifting depth is about 1 cm, one day The perched area is about 80 m ² .

  Further, when the inner diameter of the chimney 12 is greatly different between the position of the first expansion / contraction means 34 and the position of the second expansion / contraction means 36, or the inner wall of the chimney is uneven, the second expansion / contraction means. The second expansion / contraction means 36 is expanded and contracted independently of the expansion / contraction of the first expansion / contraction means 34 by the independent expansion / contraction drive means 45 provided in 36, and the nozzle 18 is moved to the inner wall at the corresponding position.

  As a result, it is possible to easily cope with a change in the diameter of the inner wall of the chimney 12 and unevenness.

  Next, when cleaning the chimney 12 having a relatively large inner diameter, a pair of arms 46a and 46b are further added to the extendable arms 48 of the first extendable means 34 and the second extendable means 36 as shown in FIG. The chimney 12 shown in FIG. 1A can sufficiently correspond to the inner diameter of the chimney bottom portion shown in FIG.

  The present invention is not limited to the above-described embodiment, and can be modified into various forms within the scope of the gist of the present invention.

  For example, in the above embodiment, the chimney is shown as the cylindrical structure. However, the present invention is not limited to this example, and can be applied to a horizontal cylindrical structure such as a water pipe. The apparatus may be used in a horizontal type.

  Moreover, in the said embodiment, although the washing | cleaning apparatus is suspended and moved by moving means, such as a winch, it is not restricted to this example, For example, it is a pipe or a rod along an axial direction in a cylindrical structure. The cleaning device may be moved along it, or the wire attached in a loop shape by moving the wire inside and outside the cylindrical structure and moving the wire to move the cleaning device It is also possible to move the device.

  Furthermore, the first expansion / contraction means and the second expansion / contraction means are adapted to be expanded / contracted by an expansion / contraction arm having a pair of arms rotatably attached at the center position. It is also possible to use it.

  In addition, the number of the extension arms of the second extension / contraction means may be increased to increase the number of nozzles.

  Furthermore, since refractory bricks are usually stacked in the chimney, the refractory bricks are also cleaned by the cleaning device.

It is the whole schematic diagram which shows the state which removes the deposit | pollution | contamination contaminated with dioxins before dismantling in the dismantling construction of a cleaning factory using the washing | cleaning apparatus which concerns on one embodiment of this invention. It is an enlarged front view of the washing | cleaning apparatus of FIG. The state which wash | cleans the inner wall of a comparatively small diameter chimney is shown, (1) is sectional drawing near chimney upper end part, (2) is sectional drawing near chimney bottom part. It is sectional drawing which follows the AA line of FIG. 3 (1). It is sectional drawing which follows the BB line of FIG. 3 (1). The state of cleaning the inner wall of a chimney having a relatively large inner diameter is shown, wherein (1) is a cross-sectional view near the chimney upper end, and (2) is a cross-sectional view near the chimney bottom.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cleaning apparatus 12 Chimney 14 Abrasive jet means 18 Nozzle 34 1st expansion-contraction means 36 2nd expansion-contraction means 38 Movement means 40 Rotation movement means 42 Interlocking means 44 Swing means 45 Independent expansion-contraction drive means

Claims (2)

The tubular structure can be inserted into the tubular structure, can be expanded and contracted in the radial direction of the tubular structure, abuts against the inner wall of the tubular structure, and can follow the inner diameter of the tubular structure. First telescopic means fixed in a radial direction with respect to the structure;
A second telescopic means that is extendable in the radial direction of the cylindrical structure and is rotatably attached to the first elastic means;
Moving means for allowing the first expanding and contracting means and the second expanding and contracting means to move in the axial direction of the cylindrical structure;
Rotational movement means for rotationally moving the second expansion / contraction means along the inner periphery of the cylindrical structure;
Interlocking means for expanding / contracting the second expansion / contraction means according to expansion / contraction of the first expansion / contraction means;
A plurality of nozzles attached to an outer peripheral position of the second expansion and contraction means and positioned at a predetermined distance from the inner wall of the cylindrical structure by the expansion and contraction of the second expansion and contraction means; An abrasive that supplies a high-pressure cleaning liquid mixed with an abrasive and injects the high-pressure cleaning liquid from the nozzle onto the inner wall of the cylindrical structure so that the inner wall of the cylindrical structure can be suspended at a predetermined depth. Jet means;
Rocking means for allowing the nozzles to rock in the axial direction of the cylindrical structure;
I have a,
The second expansion / contraction means expands only the second expansion means while maintaining the expansion state by the first expansion / contraction means in a state of being expanded in conjunction with the first expansion / contraction means by the interlocking means, Alternatively , a cleaning device for a cylindrical structure characterized by having an independent expansion / contraction drive means that enables contraction from this extended state . A method for cleaning a cylindrical structure that performs suspension cleaning of the inner wall of the cylindrical structure using the cleaning device according to claim 1,
Detecting the penetration of contaminants into the inner wall of the cylindrical structure;
A step of bringing the first expansion / contraction means into contact with an inner wall of the cylindrical structure and expanding / contracting the first expansion / contraction means according to an inner diameter of the cylindrical structure;
The second expansion / contraction means supporting the plurality of nozzles positioned at a predetermined distance with respect to the inner wall of the cylindrical structure is expanded / contracted in conjunction with the expansion / contraction operation of the first expansion / contraction means by the interlocking means, While adjusting the position of the nozzle with respect to the inner wall of the cylindrical structure, the second expansion / contraction means is rotated and moved along the inner periphery of the cylindrical structure, and the swinging means While oscillating the nozzle in the axial direction, a high-pressure cleaning liquid mixed with an abrasive from the nozzle is sprayed onto the inner wall of the cylindrical structure by the abrasive jet means, and the detected permeability of the contaminants is increased. Suspending the inner wall of the cylindrical structure at a predetermined depth in accordance with the step of removing the contaminated portion;
Moving the first telescopic means and the second telescopic means in the axial direction of the cylindrical structure by the moving means to move the nozzle in the axial direction of the cylindrical structure;
When the inner diameter of the cylindrical structure is different between the position of the first expansion / contraction means and the position of the second expansion / contraction means, the interlocking means maintains the extended state in conjunction with the first expansion / contraction means. In this state, the independent expansion / contraction driving means provided in the second expansion / contraction means expands only the second expansion / contraction means, or contracts the second expansion / contraction means by expanding / contracting the second expansion / contraction means. Moving to the injection position on the inner wall of the corresponding position;
A method for cleaning a cylindrical structure, comprising:

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