JP6533768B2 - Water pipe scale removing device - Google Patents

Description

  The present invention relates to a water pipe scale removing apparatus, and more particularly to a water pipe scale removing apparatus capable of preventing damage to a water pipe associated with scale removal.

  The waste heat boiler of the refuse incineration facility is configured to provide a heat transfer pipe in the boiler flue communicating with the combustion chamber to recover heat from the exhaust gas flowing through the flue.

  In order to prevent the corrosion of the heat transfer tube due to the corrosive components in the exhaust gas, Patent Document 1 blows a neutralizing agent for neutralizing the corrosive components into the exhaust gas and mixes the neutralizing agent with the dust on the surface of the heat transfer tube. It is disclosed to protect piping and to suppress corrosion by depositing.

  Further, Patent Document 1 also describes that the heat transfer tube is beaten by an automatic stamping device to remove dust and the like attached to the surface of the heat transfer tube.

Japanese Patent Application Laid-Open No. 10-148303

  However, it is difficult to sufficiently remove these scales in the beating apparatus described in Patent Document 1. Increasing the strength of the beating will damage the heat transfer tube.

  Therefore, an object of the present invention is to provide a water pipe scale removing device capable of preventing damage to the water tube associated with the removal of the scale.

  Further, other objects of the present invention will become clear by the following description.

(Claim 1)
A rotating brush device for removing scale adhering to the surface of the water tube,
A traveling device which travels the rotating brush device by remote control to a point where it is desired to remove the attached scale in the water pipe;
A water pipe scale removing device comprising: a traveling guide portion for causing the traveling device to travel;
The brush used in the rotating brush device extends from the cup supporting the brush into an inner hollow cylindrical shape,
A water pipe scale removing device characterized in that the brush of the rotating brush device contacts with a scale attached to the water tube in a state where the brush of the rotating brush device is expanded to the outer peripheral side by a centrifugal force and removes the scale.
(Claim 2)
The traveling device includes a traveling stage for fixing a lower structure of the brush device fixing portion, and a plurality of tires for supporting the brush device to be able to move forward and backward on the traveling stage. Water pipe scale removing device as described.
(Claim 3)
The water pipe scale removing device according to claim 1 or 2, wherein the traveling guide portion has a traveling rail sandwiched between a plurality of tires and a traveling rail support portion for supporting the traveling rail.

  ADVANTAGE OF THE INVENTION According to this invention, the water pipe scale removal apparatus which can prevent the damage of the water pipe accompanying removal of a scale can be provided.

A perspective view showing a water pipe scale removing device according to an embodiment of the present invention Front view of the water pipe scale removing device shown in FIG. 1 (A) is a plan view of the water pipe scale removing apparatus shown in FIG. 1, (b) is a cross-sectional view taken along line (b)-(b) in FIG. 2, (c) is a line (c)-(c) in FIG. Cross section Diagram for explaining an example of payment operation Flat sectional view for explaining an example of the arrangement of the water pipe scale removing device with respect to the piping group Enlarged cross-sectional view of FIG. 5 Photograph showing an example performing payment processing with a rotating brush Photograph explaining an example of the water loss condition of the water pipe

Hereinafter, embodiments of the present invention will be described in detail.
A water pipe scale removing apparatus according to an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a perspective view showing an example of a water pipe scale removing device. FIG. 2 is a front view of the water pipe scale removing device shown in FIG. 3 (a) is a plan view of the water pipe scale removing device shown in FIG. 1, FIG. 3 (b) is a cross-sectional view taken along line (b)-(b) in FIG. 2, and FIG. 3 (c) is (c) in FIG. )-(C) line cross-sectional view.

  The water pipe scale removing device 1 includes a rotating brush device 2 detachably fixed by the brush device fixing unit 3, a traveling device 4 that supports the rotating brush device 2 so as to travel, and a traveling guide that enables the traveling device 4 to travel. It is constituted by the part 5.

  The rotating brush device 2 includes a cleaning unit body 21 and a rotating device 22, and removes scales (ash) from a water pipe (not shown) here.

  The cleaning unit main body 21 connects the rotating brush 211 formed of a plurality of linear members, a cup-shaped brush support unit 212 supporting the rotating brush 211, the brush support member 212 and the rotating device 22, and a rotating device A rotating shaft 213 is provided to transmit the rotational force of 22 to the brush support 212.

  The center side of the brush support portion 212 of the rotating brush 211 is an internal hollow in which a linear body is not provided, and is provided in a substantially cylindrical shape as a whole. Then, it extends forward in a tapered shape from the cup-shaped brush support member 212.

  Further, as the brush support portion 212 of the cleaning portion main body 21 is rotationally driven by the rotation device 22 as a whole, the centrifugal force acts on the rotary brush 211, and the rotary brush 211 is expanded outward. Therefore, as a material of the rotating brush, it is preferable to have the above-mentioned degree of flexibility to expand.

  Moreover, it is preferable that the rotating brush 211 has the low brush hardness below the hardness of a water pipe as a whole. As a result, the freedom of movement (flowability) of the brush 211 as a whole is improved, and when the scale is removed from the water pipe, damage to the water pipe can be more significantly prevented.

  Therefore, the material and thickness of each filament of the rotating brush 211 consisting of a plurality of filaments can be appropriately selected so that the plurality of filaments satisfy the conditions of the above-mentioned flexibility and brush hardness as a whole.

  The material of the plurality of filaments may be a metal filament or a resin filament. The metal filament is excellent in scale removal performance. The resin filament is excellent in the buffer performance to relieve stress. And 70%-80% of the number of the metal filament is preferable with respect to the total number of a plurality of filaments, It is preferable that the number of resin filaments is the range of 30%-20% . By comprising in these ranges, a flexible resin filament can urge a metal filament by a centrifugal force, and the several filament 211 whole can be expanded suitably.

  Examples of the material of the metal wire include steel, brass, stainless steel and the like. The metal wire can also have a core-sheath structure consisting of, for example, a core made of steel, brass or stainless steel, and a sheath made of gold, copper or aluminum.

  Examples of the material of the resin filament include nylon, polyamide, polyester and the like.

  In addition to the above, as the material of the wire, it is also possible to use a mixture of a resin as described above and a metal powder such as aluminum. At this time, by adjusting the content of the metal powder, it is possible to adjust the softness and the brush hardness as a whole of the plurality of filaments.

  The shape of the filament of the brush 211 may be straight or wavy. Moreover, the thing of a different shape may be combined and used, and a stranded wire may be sufficient.

  The brush support portion 212 preferably has a cup shape having a circular outer peripheral shape. Thereby, the brush 211 can be expanded at the time of rotation.

  The rotation shaft 213 may be provided integrally with the cleaning unit main body 21 or may be provided integrally with the rotation device 22. Further, the cleaning unit main body 21 and the rotating device 22 may be connected separately from the cleaning unit main body 21.

  In addition, it is preferable that the cleaning unit main body 21 be detachably connected to the rotation device 22 or the rotation shaft 213. Thereby, when the brush 211 can not be used due to wear, replacement can be easily performed.

  In the present embodiment, the brush 211 is mainly oriented in the direction of the rotation axis 213 when not rotating. Then, when rotating, the brush 211 is bent at the outer peripheral edge of the cup-shaped brush support portion 212 and is spread so as to be inclined to the outer peripheral side with respect to the rotation shaft 213.

  The rotation device 22 includes a housing 221, and the housing 221 includes a rotation mechanism including a motor (not shown) and the like. The rotation shaft 213 can be driven to rotate by this rotation mechanism. The rotating device 22 is not particularly limited as long as it generates rotational power to an extent that the brush 211 is expanded by centrifugal force.

  The brush device fixing unit 3 has an upper structure 31 disposed at the upper portion of the rotating device 22 and a lower structure 32 disposed at the lower portion of the rotating device 22. A housing 221 constituting the rotation device 22 is held between the upper structure 31 and the lower structure 32 and the rotation device 22 is fixed by tightening in the vertical direction with a bolt.

  The traveling device 4 is configured by a traveling stage 41 and a plurality of (four in the illustrated example) tires 42 which rotationally drive the traveling guide 5 to be described later. The traveling stage 41 is composed of an upper member 411 and a lower member 412. The lower structure 32 of the brush device fixing portion 3 is fixed to the upper member 411 by a bolt, welding or the like. On the other hand, the tire 42 is rotatably fixed to the lower structure 412. The upper member 411 and the lower member 412 constituting the traveling stage 41 are fixed to each other by bolts, welding or the like.

  In the present embodiment, the water pipe scale removing device 1 is provided with an air purge 43. The air purge 43 is constituted by a compressed air inlet 431, a flow path 432, and an injection port 433. The compressed air inlet 431 is configured to be connectable to a compressed air supply device (not shown) via an air tube (not shown). In the present embodiment, the compressed air inlet 431 is provided in front of the traveling device 4. The flow path 432 leads the compressed air introduced into the compressed air inlet 431 to the injection port 433. In the present embodiment, the flow path 432 is formed in the lower member 412 by machining the lower member 412 made of a block of aluminum. The flow path 432 extends from the front (front end face) of the lower member 412 to the vicinity of the central portion, and then extends further downward, and opens at the lower surface of the lower member 412 to form the injection port 433. The injection port 433 is disposed in the vicinity of the center position of the four tires 42. The air purge 43 injects compressed air in all directions from the injection port 433 and removes dust and the like generated by the discharge processing. As a result, adhesion of dust and the like to the traveling device 4 and the traveling guide portion 5 is prevented, and an effect such as stabilization of traveling of the traveling device 4 can be obtained.

  The traveling guide unit 5 is a long member provided with a traveling rail 51 and a traveling rail support unit 52.

  The traveling rail 51 is supported on the traveling rail support 52. The traveling rail 51 can be fixed on the traveling rail support 52 by, for example, a bolt or welding. The material of the traveling rail 51 is not particularly limited, and can be made of, for example, rubber, resin, metal or the like.

  The traveling rail 51 has a T-shaped cross section, and a plurality of tires 42 provided on the traveling stage 41 are engaged from both sides. Thus, the traveling device 4 can move forward and backward along the traveling rail 51.

  The traveling rail support portion 52 has a U-shaped cross section opened downward, and can be formed of a long member capable of supporting the long traveling rail 51.

  The traveling device 4 may be self-propelled or manual. In any of the methods, by providing the travel guide portion 5, the brush device 2 can be moved to a desired position accurately by remote control, and therefore, it is possible to suitably pay for piping which the operator can not reach.

  In the case of the self-propelled type, a drive mechanism (for example, a motor or the like) (not shown) can be provided so as to be operable by a controller (not shown) connected to the drive mechanism by wire or wireless. The travel may be automatically controlled by a program.

  In the case of manual operation, for example, a long operation rod (not shown) can be attached and configured to be manually operable.

  Below, the effect | action by the water pipe scale removal apparatus 1 is demonstrated based on FIG. Here, the case where the surface (peripheral surface) of the water pipe 6 is treated by the discharging operation will be described.

  As shown in FIG. 4, the brush 211 is expanded by the centrifugal force generated as the rotation shaft 213 rotates, and is expanded outward from the brush support 212.

  The expanded brush 211 does not have the brush support portion 212 at the rear, so the movement to the rear is not easily restricted. As a result, when the brush device 2 is advanced to bring the brush 211 into contact with the water pipe 6, the brush 211 can escape rearward, and it is avoided that the brush 211 is strongly pressed against the water pipe 6. As a result, application of forces in the orthogonal direction to the surface of the water tube 6 is suppressed, and the surface of the water tube 6 can be scaled mainly by forces in the parallel direction. By the action of such a "dispensing operation", damage to the water pipe 6 accompanying the removal of the scale is prevented.

  In particular, since the brush 211 is expanded toward the outer peripheral side than the brush support portion 212, the rotational speed is high. Therefore, even if there is a degree of flexibility to be expanded by the centrifugal force, the scale of the water pipe 6 can be sufficiently removed by the removing operation. Moreover, since it is flexible, backward movement is also sufficiently tolerated, and there is no risk of damaging the water pipe 6. That is, according to the present invention, it is possible to achieve both of the scale removal performance and the water pipe damage prevention.

  Furthermore, by forming the brush 211 of the cleaning unit main body 21 with a brush hardness lower than the surface hardness of the water tube 6, it is possible to reliably prevent damage to the pipe by a synergetic effect with the above-described "dipping operation". .

  Next, an example in the case of using the water pipe scale removal apparatus 1 for the piping group which consists of several water pipe 6 which an operator's hand does not reach is demonstrated with reference to FIG.

  As shown in FIG. 5, a piping group consisting of a plurality of water pipes 6 is provided in the flue 7 communicating with the combustion chamber of the refuse incinerator. In the piping group, a plurality of water pipes 6 are arranged in a grid. For example, the water pipes 6 are repeatedly arranged at a predetermined pitch in each of the X direction shown in FIG. 5 and the Y direction orthogonal to the X direction. Each water pipe 6 extends in the Z direction orthogonal to the X and Y directions.

  The material of the water pipe 6 is not particularly limited, and examples thereof include stainless steel such as SUS310. In this case, the brush 211 preferably has a hardness equal to or less than stainless steel such as SUS310. This is to prevent damage to the piping.

  At the time of operation of the refuse incinerator, heat recovery is performed by the piping group coming into contact with the exhaust gas G flowing through the flue 7 in the direction of the arrow Y in FIG. In this case, the exhaust gas G causes the water pipe 6 to adhere to the scale.

  Waste heat boilers are equipped with a large number of water pipes, and many water pipes can not be reached by workers. Moreover, there have been reports of accidents in which steam leaks from the water pipes that can not be reached. Since the steam in the water pipe is at a high temperature, for example, a high pressure reaching 3 MPa, ensuring safety is an urgent matter. Therefore, it is preferable to sufficiently remove the scale of the water pipe which can not be reached by the worker while preventing damage to the water pipe. It is because damage to the water pipe can lead to shortening of the life of the water pipe. In such a case, by using the water pipe scale removing apparatus 1 according to the present invention described above, it is possible to prevent damage to the water pipe associated with the removal of the scale.

  Furthermore, the heat transfer efficiency can also be recovered by removing the scale of the corrosion-prone site. In this case, the scale of the water pipe can be removed in the vertical direction by the brush device 2 by making the travel guide portion 5 movable in the vertical direction (Z direction) of the water pipe.

  Also, referring to such problems further, damage to the water tube can also lead to errors in the thickness measurement. By measuring the wall thickness, it is possible to evaluate the water pipe life, and the error in the wall thickness measurement also makes the water pipe life evaluation wrong. As a result, it is possible to overlook the original replacement time of the water pipe and cause an accident. If the scale attached to the water pipe which can not reach the operator's hand can be removed properly, the error in the thickness measurement can be reduced.

  First, the water pipe scale removing device 1 is disposed between the water pipe 6 and the water pipe 6 when the removal process is performed. As a result, in a state in which the traveling path of the brush device 2 is secured, the scale of the water pipe 6 disposed on the side can be processed by the wiping operation in the traveling process of the brush device 2.

  As shown in FIG. 6, preferably, the long travel guide member 5 has a length that allows the cleaning unit main body 21 of the brush device 2 to reach the central portion of the water tube group. Thereby, the scale attached to the surface of the water pipe 6 disposed at the center of the water pipe group can be removed by the cleaning unit main body 21.

  FIG. 7 is a photograph showing an embodiment in which the rotary brush performs the payment processing, and both of the photographs (a) and (b) show an example in which the adhesion scale is printed.

  At this time, it is preferable to arrange the water pipe scale removing device 1 so that the traveling rail 51 of the traveling guide member 5 is along the flow direction (Y direction) of the exhaust gas G.

  As shown in the photograph of FIG. 8, the portion which is reduced in thickness is a surface inclined by about 45 ° with respect to the flow direction of the exhaust gas G at the time of use.

  For this reason, by arranging the traveling guide member 5 along the circulation direction (Y direction) of the exhaust gas, the plurality of linear bodies 211 of the cleaning portion main body 21 make good contact with the 45 ° inclined surface, Payment processing can be performed.

  If this device is used as a pretreatment for thickness measurement, the thickness measurement accuracy can be improved.

  In the present embodiment, the portion other than the brush 211 of the cleaning unit main body 21 constituting the brush device 2 traveling between the water tubes 6 has a smaller width than the gap between adjacent water tubes, and the portion of the brush 211 rotates It is preferable to have a width such that the surface inclined about 45 ° to the left and right with respect to the flow direction can be removed by the centrifugal force involved. The water pipes 6 disposed on the left and right of the brush device 2 can be discharged in parallel, and the working efficiency is improved.

  The brush 211 can be fixed to the bottom side of the cup-like brush support portion 212 by, for example, holding, bonding or heat fusion. In particular, when the brush 211 contains a resin, it is also preferable to fix it to the brush support portion 212 by heat fusion, an adhesive or the like. In addition, the base end portion of the brush 211 may be fixed to the brush support portion 212 in a state of being thermally fused and integrated.

1: Water pipe scale removing device 2: Brush device 21: Cleaning unit main body 211: (rotation) brush 212: brush support 22: rotation device 221: housing 23: rotation shaft 3: brush device fixing portion 31: upper structure 32: Lower structure 4: traveling device 41: traveling stage 411: upper member 412: lower member 42: tire 43: air purge 431: compressed air inlet 432: flow passage 433: injection port 5: traveling guide member 51: traveling rail 52: traveling rail Support member 6: Water tube 7: Flue

Claims (3)

A rotating brush device for removing scale adhering to the surface of the water tube,
A traveling device which travels the rotating brush device by remote control to a point where it is desired to remove the attached scale in the water pipe;
A water pipe scale removing device comprising: a traveling guide portion for causing the traveling device to travel;
The brush used in the rotating brush device extends from the cup supporting the brush into an inner hollow cylindrical shape,
A water pipe scale removing device characterized in that the brush of the rotating brush device contacts with a scale attached to the water tube in a state where the brush of the rotating brush device is expanded to the outer peripheral side by a centrifugal force and removes the scale.   The traveling device includes a traveling stage for fixing a lower structure of a brush device fixing portion, and a plurality of tires capable of supporting the brush device to move forward and backward on the traveling stage. Water pipe scale removal device. The water pipe scale removing device according to claim 1 or 2, wherein the traveling guide portion has a traveling rail sandwiched between a plurality of tires and a traveling rail support portion for supporting the traveling rail.