JP4916298B2 - Cylindrical structure inner wall cleaning apparatus and method for supporting cylindrical structure inner wall cleaning apparatus - Google Patents

Description

  The present invention relates to a cylindrical structure inner wall cleaning device and a support method for the cylindrical structure inner wall cleaning device for cleaning and removing deposits such as a lining material attached to an inner wall of a cylindrical structure.

  Most of the chimneys of cylindrical structures connected to boilers and the like built in the Showa era are lining materials containing asbestos (chimney asbestos insulation, hereinafter referred to as “ Asbestos material)). Since the inside of the chimney is a passage for high-temperature acid gas, asbestos fibers are broken when the binding material deteriorates due to the gas, and the lining material is peeled off, and asbestos is accumulated at the leg ash outlet of the chimney. If smoke is exhausted in such a state, the asbestos fibers on the inner wall of the chimney may be discharged into the atmosphere together with the smoke.

  When removing the asbestos material while disassembling the chimney, the entire chimney was sealed to treat the asbestos material. However, the sealing process required a large-scale temporary construction and was very expensive. In the case of repair use, it was necessary to process the asbestos material in a short time.

In order to solve the above problem, a conventional chimney inner wall cleaning apparatus is provided (for example, Patent Documents 1 and 2).
JP 2000-328815 A JP 2003-294224 A

  The chimney cleaning device of Patent Document 1 includes a high-pressure air ejection device, an upper support, and a lower support, and the chimney inner wall is formed by high-pressure air that is injected from the air nozzle of the high-pressure air ejection device to the inner surface of the chimney. Was to wash. Further, in the above-described flue cleaning apparatus, the upper and lower support members (arms) and the guide rollers (wheels) provided therein prevent the apparatus itself from rotating due to the reaction of the rotation of the high-pressure air ejecting apparatus and breaking the balance. In the center of the chimney.

  The chimney inner wall cleaning apparatus of Patent Document 2 includes a fixed base (apparatus body), a water rotary injection device, and a support leg that supports the fixed base at the center inside the chimney, and is a high pressure injected from the water rotary injection device. Water was sprayed onto the chimney inner surface to clean the chimney inner wall. The support legs are attached to the fixed base at equal angular intervals, a guide pipe (arm) rotatably supported on the upper part of the fixed base, and a roller (rotatably attached to the tip of the guide pipe) Wheel).

The above two examples of the cleaning device spray high-pressure air or water from the injection nozzle to clean the inner wall of the chimney, and support the device main body at the center inside the chimney using an arm or a wheel provided in the device main body. there were.
However, the cleaning devices of Patent Document 1 and Patent Document 2 have a drawback that the asbestos material to be cleaned and scattered is scattered in a large amount in the already cleaned portion, and the portion must be cleaned again. . In addition, the asbestos fibers removed at the joints of a plurality of arms, wheels, and other apparatus main bodies are cluttered, and there is a drawback that it is difficult to clean the apparatus after the completion of the cleaning operation.
Furthermore, the cleaning device provided with a plurality of wheels and arms has a drawback that the structure or shape is complicated and it is difficult to reduce the weight.

  In order to solve the above-mentioned drawbacks, the present invention prevents a large amount of asbestos material to be washed and scattered from being washed, and enables the weight of the device to be reduced, and the inner wall cleaning device for a cylindrical structure. And it aims at providing the support method of the cylindrical structure inner wall washing | cleaning apparatus.

The tubular structure inner wall cleaning device of the present invention is held in the center of the tubular structure through a suspension wire rope hung on the hook of the winch from the opening at the top of the tubular structure. , the tubular structure inner wall cleaning apparatus main body for cleaning and removing a tubular structure the inner wall of the deposit by the cleaning removing means is a rotating body, at a predetermined gap from the inner wall of the tubular structure, the tubular structure A reaction force receiving member that is mounted so as to close the inside of the device is provided.
Further, the reaction force receiving member is arranged above the cleaning removal means of the cylindrical structure inner wall cleaning apparatus.

The cylindrical structure inner wall cleaning apparatus according to the present invention is supported at the inner central portion of the cylindrical structure through a suspension wire rope hung on the hook of the winch from the opening at the top of the cylindrical structure. in the state, the tubular structure inner wall cleaning apparatus main body for cleaning and removing a tubular structure the inner wall of the deposit by the cleaning removing means is a rotating body, at a predetermined gap from the inner wall of the tubular structure, the tubular The reaction force receiving member is attached so as to close the inside of the structure .
Further, the reaction force receiving member is arranged above the cleaning removal means of the cylindrical structure inner wall cleaning apparatus.

  The cylindrical structure inner wall cleaning device and the method for supporting the cylindrical structure inner wall cleaning device of the present invention are configured to close the inside of the cylindrical structure with a reaction force receiving member attached to the main body of the device. Thereby, even if the balance of the apparatus main body is lost due to the reaction force of the injection of high-pressure water or high-pressure air, the apparatus main body can be prevented from colliding with the inner wall of the cylindrical structure. In addition, since the apparatus main body can be supported without using an arm or wheels as in the prior art, the apparatus can be reduced in weight, and can be easily handled during a cleaning operation, thereby ensuring work safety. Furthermore, since the structure and shape of the apparatus can be simplified, the apparatus can be easily cleaned after the cleaning operation.

  By mounting the reaction force receiving member above the injection nozzle, it is possible to prevent a large amount of the asbestos material that has been washed away from being scattered in the washed and removed part.

  The present invention prevents a large amount of the removed asbestos material from being scattered in the already cleaned site, and prevents the apparatus main body from colliding with the inner wall of the cylindrical structure. Is to be removed by washing.

The cylindrical structure inner wall cleaning apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a cylindrical structure inner wall cleaning device in a state of being disposed in a chimney. FIG. 2 is a plan view of the cylindrical structure inner wall cleaning apparatus of FIG. 1.
The cylindrical structure inner wall cleaning apparatus 10 is for cleaning and removing high pressure water (or ultrahigh pressure water) 16 on the asbestos material 14 affixed to the inner wall 12a of the chimney 12 which is a cylindrical structure. . The cylindrical structure inner wall cleaning apparatus 10 includes an apparatus main body 18 and a reaction force receiving member 20 attached to the apparatus main body 18.

  The apparatus main body 18 includes a water injection nozzle 22 as a cleaning removal means, a high-pressure water jet device 24 that rotates the water jet nozzle 22, a turning motor 26 that drives the high-pressure water jet device 24, and a high-pressure water jet device 24. A high-pressure water supply pipe 28 for supplying the high-pressure water 16 is provided. The water jet nozzle 22 is detachably attached to the high-pressure water jet device 24.

  The cylindrical structure inner wall cleaning apparatus 10 is moved up and down by a winch 30 with a variable speed function provided on a temporary stage (not shown) provided on the top of the chimney 12. In FIG. 1, the inner wall cleaning device 10 of the cylindrical structure has an inner central portion of the chimney 12 via a suspension wire rope 32 hung on a hook 36 of a winch 30 from an opening (not shown) at the top of the chimney 12. It is held in the state. Both ends of the suspension wire rope 32 are attached to suspension fittings 38 provided in the apparatus main body 18, and the cylindrical structure inner wall cleaning device 10 is held inside the chimney 12.

  The high-pressure water supply pipe 28 guides the high-pressure water 16 fed from a high-pressure water generator (not shown) provided outside the chimney 12 to the high-pressure water ejection device 24. The high-pressure water 16 is jetted from the water jet nozzle 22 toward the inner wall 12a, and the asbestos material 14 is washed and removed. At this time, the water injection nozzle 22 injects the high-pressure water 16 while rotating (or swiveling) in the direction A in FIG. 1, but the balance of the cylindrical structure inner wall cleaning device main body 18 is lost due to the reaction force of the injection. Further, the asbestos material 14 that has been washed away is scattered in a large amount toward the portion that has already been washed away (above the water injection nozzle 22).

  As shown in FIGS. 1 and 2, the reaction force receiving member 20 is attached to the apparatus main body 18 so as to block a predetermined gap 40 from the inner wall 12 a of the chimney 12 and close the inside 34 of the chimney 12. The reaction force receiving member 20 is a plate-like member and is formed in a shape and a size that match the inner diameter of the chimney 12. By attaching the reaction force receiving member 20 to the apparatus main body 18, the apparatus main body 18 is supported by the reaction force receiving member 20 even when the apparatus main body 18 loses balance due to the reaction force. Will not collide.

In FIG. 1, the reaction force receiving member 20 is attached to a part of the fixing member 42 that fixes the hanging bracket 38 to the apparatus main body 18 by fixing means 44 (for example, fixing with bolts and nuts). The attachment method of the force receiving member 20 is not limited to this.
Moreover, the reaction force receiving member is prepared in advance in various shapes having different diameters (sizes), and a member that matches the inner diameter of the chimney to be operated is selected and used.

  The reaction force receiving member 20 may be attached to any position of the apparatus main body 18, but is preferably disposed above the water jet nozzle 22, particularly at an adjacent position as shown in FIG. 1. As a result, it is possible to prevent the asbestos material 14 that has been washed away from scattering toward the site that has already been washed away, and there is no need to repeat the washing operation again.

The material that forms the reaction force receiving member 20 may be any material that can withstand a collision with the inner wall 12 a of the chimney 12. The material is preferably a metal, but is not limited thereto. For example, a synthetic resin or rubber may be used in addition to the metal.
In addition, the reaction force receiving member 20 is preferably a plate having a predetermined thickness in order to reduce the weight of the cylindrical structure inner wall cleaning apparatus 10, but the shape thereof is not limited. For example, it may be a columnar case having the plate-like reaction force receiving member 20 of FIG. In this case, the apparatus main body 18 excluding the water jet nozzle 22 which is a washing and removing means is housed in the casing, and the asbestos material 14 is washed and removed by the water jet nozzle 22 while the casing is moved up and down by the winch 30.

A space (hole) 46 for mounting the reaction force receiving member 20 in the apparatus main body 18 (the same shape as the outer shape 18a of the apparatus main body 18 in FIG. 2) is provided at the center of the plate-like reaction force receiving member 20 in FIG. Hole) is formed. In the cylindrical structure inner wall cleaning apparatus 10 of FIG. 1, the reaction force receiving member 20 is mounted from the apparatus main body 18 from the side of the high pressure water jetting device 24 with the water jet nozzle 22 once removed. The fixing is performed by fixing the fixing member 42 with fixing means 44.
The plate-shaped reaction force receiving member 20 shown in FIGS. 1 and 2 may be a single member or may be formed by combining two or more members.

  By supporting the apparatus main body 18 with the reaction force receiving member 20, it is possible to provide an apparatus having a simple structure or shape, and to compare the apparatus main body 18 with a conventional arm or wheel, etc. Weight reduction is possible. Thereby, the handling of the cylindrical structure inner wall cleaning apparatus 10 during the cleaning operation is facilitated, and the operation can be performed safely. Moreover, the apparatus can be easily cleaned after the cleaning operation is completed.

  The method of supporting the cylindrical structure inner wall cleaning apparatus of the present invention is the reaction force receiving member described above so that the apparatus main body 18 for cleaning and removing the asbestos material 14 adhering to the inner wall 12a of the chimney 12 is covered with the interior 34 of the chimney 12. By mounting 20, the cylindrical structure inner wall cleaning device 10 is supported at the center of the inside 34 of the chimney 12.

  In the said Example, although washing | cleaning removal of the asbestos material 14 of the chimney 12 was illustrated, this invention is not limited to washing | cleaning removal of the said deposit | attachment. It can also be applied to cleaning chimneys contaminated with dioxins. Moreover, it is applicable also to cylindrical structures other than the chimney 12. Furthermore, in the said Example, although the washing | cleaning apparatus which used the water injection nozzle as a washing | cleaning removal means was illustrated, other washing | cleaning removal means, for example, using the air injection nozzle and rotary cutter like patent document 1 mentioned above, for example. The present invention can also be used for a cylindrical structure inner wall cleaning device that removes deposits.

It is a figure which shows the cylindrical structure inner wall washing | cleaning apparatus of this invention of the state arrange | positioned in a chimney. It is a top view of the cylindrical structure inner wall washing | cleaning apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cylindrical structure inner wall washing | cleaning apparatus 12 Chimney 12a Inner wall 14 Asbestos material 18 Apparatus main body 20 Reaction force receiving member 22 Water injection nozzle
30 Winch
32 Inside suspended wire rope 34
36 hook
40 gap

Claims (4)

Rotating body attached to the inner wall of the cylindrical structure while being held at the inner center of the cylindrical structure via a hanging wire rope hung on the winch hook from the opening at the top of the cylindrical structure the tubular structure inner wall cleaning apparatus main body for cleaning removed by washing removing means is, from the inner wall of the tubular structure with a predetermined interval between receiving the reaction force is attached so as to close the interior of the tubular structure An apparatus for cleaning an inner wall of a cylindrical structure, comprising a member. 2. The cylindrical structure inner wall cleaning apparatus according to claim 1, wherein the reaction force receiving member is disposed above the cleaning removal means of the cylindrical structure inner wall cleaning apparatus. Rotating body attached to the inner wall of the cylindrical structure while being held at the inner center of the cylindrical structure via a hanging wire rope hung on the winch hook from the opening at the top of the cylindrical structure the tubular structure inner wall cleaning apparatus main body for cleaning removed by washing removing means is, from the inner wall of the tubular structure with a predetermined interval between mounting a reaction force receiving member so as to close the interior of the tubular structure A method for supporting an inner wall cleaning device for a cylindrical structure, characterized in that: 4. The method of supporting a cylindrical structure inner wall cleaning apparatus according to claim 3, wherein the reaction force receiving member is disposed above the cleaning removal means of the cylindrical structure inner wall cleaning apparatus.

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