JP2015124949A - Boiler tube reinforcement fixture and boiler tube reinforcement method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a boiler tube reinforcement fixture and a boiler tube reinforcement method capable of simply and uniformly fixing a reinforcement to a specific region of a boiler tube even if the boiler tube is arranged in a narrow portion.SOLUTION: A boiler tube reinforcement fixture 100 of the present invention is a boiler tube reinforcement fixture 100 for fixedly winding a boiler tube reinforcement 10 formed out of a wire material that can be wound around a boiler tube t, around the boiler tube t, comprising: a fixture body 101 having a through-hole H into which the boiler tube t can be inserted; and a groove 101a provided helically on an inner circumferential surface of the through-hole H and having a width at which a metallic wire of the boiler tube reinforcement 10 can be stored in the groove 101a.

Description

  The present invention relates to a boiler tube reinforcing tool fixing jig and a boiler tube reinforcing method provided in a power plant, and more particularly to a boiler tube reinforcing tool fixing jig and a boiler tube reinforcing method that can reinforce a specific area of the boiler tube. Regarding the method.

  Conventionally, in a boiler tube attached to a boiler such as a thermal power plant, thinning due to local overheating and bulging deformation due to creep deterioration may occur due to adhesion of carbonized oil or the like. In order to prevent damage due to the bulging deformation of the boiler tube, a boiler tube reinforcing method in which a metal wire is wound around the outer peripheral surface of the boiler tube has been proposed (for example, see Patent Document 1). In this boiler tube reinforcing method, a bulging portion is formed by winding a metal wire around the outer circumferential surface of the bulging portion of the boiler tube so as to tighten the bulging portion along the circumferential direction of the boiler tube. It becomes possible to prevent the boiler tube from being damaged due to further bulging.

JP 2013-96681 A

  By the way, in the boiler tube attached to boilers, such as a thermal power plant, it has a narrow part by which a plurality of boiler tubes are densely arranged at a narrow interval. In such a narrow boiler tube, it has been difficult to uniformly wind a metal wire around a specific region of the boiler tube. Further, in the conventional boiler tube reinforcement method, since the worker individually winds the metal wire around the boiler tube using the tightening device, the metal wire is not necessarily uniformly applied to the specific area of the boiler tube. In some cases, it could not be fixed. Therefore, there is a demand for a technique that can easily and uniformly fix a boiler tube reinforcement to a specific region of the boiler tube.

  The present invention has been made in view of such a situation, and even for a boiler tube arranged in a narrow part, reinforcement for a boiler tube capable of easily and uniformly fixing a reinforcing tool to a specific region of the boiler tube. An object is to provide a tool fixing jig and a method for reinforcing a boiler tube.

  The boiler tube reinforcement fixture fixing jig of the present invention is a boiler tube reinforcement fixture fixing jig for winding and fixing a boiler tube reinforcement made of a wire that can be wound around the boiler tube. A jig body having a through-hole through which the boiler tube can be inserted, and a groove portion provided in a spiral shape on the inner peripheral surface of the through-hole and having a width capable of accommodating the wire rod of the boiler tube reinforcing tool. It is characterized by having.

  According to this configuration, after inserting the boiler tube reinforcing tool into the boiler tube through the through hole of the jig body, the jig rotates while rotating in the circumferential direction of the boiler tube with the tube axis direction of the boiler tube as the rotation axis. The boiler tube reinforcing tool can be fastened to the boiler tube only by moving the main body from one end side to the other end side of the boiler tube reinforcing tool. This makes it possible to fix the boiler tube reinforcing tool to the boiler tube at a substantially uniform interval according to the width of the groove provided spirally along the inner peripheral surface of the through-hole even when implemented by different installers. it can. Moreover, since it becomes possible to form a jig body smaller than the case of using a fixing device for boiler tube reinforcement, it is easy even for boiler tubes arranged in narrow spaces at narrow intervals. It becomes possible to wind the boiler tube reinforcement. Therefore, even if it is a boiler tube arrange | positioned at a narrow part, the reinforcement fixture fixing tool for boiler tubes which can fix a reinforcement to the specific area | region of a boiler tube simply and uniformly is realizable.

  In the boiler tube reinforcing tool fixing jig of the present invention, it is preferable that the jig main body includes a first member and a second member that form the through hole by being integrally fixed by a fixing tool. According to this configuration, the boiler tube can be inserted into the through-hole by fixing the first member and the second member in the vicinity of the boiler tube after separating the first member and the second member. Thus, it is possible to more easily wind the boiler tube reinforcing tool even on the boiler tubes arranged at narrow intervals.

  In the boiler tube reinforcing tool fixing jig of the present invention, it is preferable that the inner diameter of the through hole is substantially the same as the outer diameter of the boiler tube. With this configuration, the boiler tube reinforcing tool can be wound along the outer diameter of the boiler tube, so that the boiler tube reinforcing tool can be more evenly wound around the boiler tube.

  The boiler tube reinforcement method of the present invention is a boiler tube reinforcement method using the boiler tube reinforcement fixture fixing jig, and the winding step of winding the boiler tube reinforcement around the outer peripheral surface of the boiler tube. And inserting the boiler tube into the through hole of the jig body, and rotating the jig body in the circumferential direction of the boiler tube with the tube axis direction of the boiler tube as a rotation axis. And a tightening step of tightening and fixing to the boiler tube.

  According to this method, after inserting the boiler tube reinforcing tool into the boiler tube through the through hole of the jig body, the jig rotates while rotating in the circumferential direction of the boiler tube with the tube axis direction of the boiler tube as the rotation axis. The boiler tube reinforcing tool can be fastened to the boiler tube only by moving the main body from one end side to the other end side of the boiler tube reinforcing tool. Thereby, even if a different installer implements, the boiler tube reinforcement can be fixed to the boiler tube at a uniform interval according to the width of the groove portion spirally provided along the inner peripheral surface of the through hole. . Moreover, since it becomes possible to form a jig body smaller than the case of using a fixing device for boiler tube reinforcement, it is easy even for boiler tubes arranged in narrow spaces at narrow intervals. It becomes possible to wind the boiler tube reinforcement. Therefore, even if it is a boiler tube arrange | positioned at a narrow part, the reinforcement method of the boiler tube which can fix a reinforcement tool to the specific area | region of a boiler tube simply and uniformly is realizable.

  In the boiler tube reinforcement method of the present invention, it is preferable that the method further includes a fixing step of fixing both ends of the boiler tube reinforcing tool to which the boiler tube is fastened to the outer peripheral surface of the boiler tube. By this method, since both ends of the wound boiler tube reinforcing tool after being tightened to the boiler tube can be fixed to the boiler tube, it is possible to prevent loosening of the boiler tube reinforcing tool.

  In the boiler tube reinforcing method of the present invention, it is preferable that one end of the boiler tube reinforcing tool is fixed by a fixing tool, and the boiler tube reinforcing tool is tightened by the jig body from the fixed one end side. According to this method, it is possible to prevent the boiler tube reinforcing tool from moving due to the tightening of the boiler tube reinforcing tool by the jig main body, so that the boiler tube reinforcing tool can be tightened more uniformly.

  According to the present invention, there is provided a boiler tube reinforcing tool fixing jig and a boiler tube reinforcing method capable of fixing a reinforcing tool to a specific region of a boiler tube easily and uniformly even in a boiler tube arranged in a narrow portion. realizable.

FIG. 1 is a schematic diagram of a boiler tube according to the present embodiment. FIG. 2 is a schematic perspective view of a positioner used for manufacturing the reinforcing tool according to the present embodiment. FIG. 3 is an explanatory diagram of a method for manufacturing a reinforcing tool according to the present embodiment. FIG. 4 is a schematic view showing the reinforcing tool after being removed from the dummy material. FIG. 5 is an explanatory diagram of a method for reinforcing the bulging portion using a reinforcing tool. FIG. 6A is a front view of a boiler tube reinforcing fixture fixing jig according to the present embodiment. FIG. 6B is a plan view of the boiler tube reinforcing fixture fixing jig according to the present embodiment. 6C is a cross-sectional view taken along line AA in FIG. 6B. FIG. 6D is an explanatory diagram of a groove portion of the boiler tube reinforcing tool fixing jig according to the present embodiment. FIG. 6E is an explanatory diagram of a groove portion of the boiler tube reinforcing tool fixing jig according to the present embodiment. FIG. 7A is an explanatory diagram of a boiler tube reinforcing method according to the present embodiment. FIG. 7B is an explanatory diagram of a boiler tube reinforcing method according to the present embodiment. FIG. 8 is a schematic diagram showing an example of a fixing tool used in the boiler tube reinforcing method according to the present embodiment. FIG. 9 is an explanatory view of a tightening process of the boiler tube reinforcing method using the fixing tool shown in FIG.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited to each following embodiment, It can implement by changing suitably. Moreover, the same code | symbol is attached | subjected to the component which is common in each embodiment, and duplication of description is avoided.

  FIG. 1 is a schematic diagram of a boiler tube t according to the present embodiment. The boiler tube t shown in FIG. 1 is a tubular member made of high Cr steel having an outer diameter of 45 to 60 mmφ, for example. The boiler tube t has a bulging portion e generated by thinning due to local overheating and creep deterioration due to adhesion of carbonized oil or the like. For example, a reinforcing tool 10 formed by forming one continuous metal wire 12 having a diameter of 1.2 mm into a hollow cylindrical shape is attached to the bulging portion e. In addition, the reinforcing tool 10 according to the present embodiment is not necessarily used only for the bulged portion e that has already bulged, but also in a specific region that has a possibility of bulging and thinning discovered by diagnosis of a metal structure. It is possible to use.

  FIG. 2 is a schematic perspective view of a positioner 20 used for manufacturing the reinforcing tool 10 according to the present embodiment. As shown in FIG. 2, the positioner 20 includes a chuck 22 that grips a substantially cylindrical dummy material d, and a drive motor 24 that rotates the chuck 22. The chuck 22 and the drive motor 24 are supported on the floor by the legs 26. In this positioner 20, a chuck 22 holds a dummy material d having a cylindrical shape with a perfect cross section and fixes it in the horizontal direction. In this positioner 20, the dummy material d is rotated around the axial direction by rotating the chuck 22 that holds the dummy material d by the drive motor 24.

  Next, with reference to FIG. 3, the manufacturing method of the reinforcing tool 10 which concerns on this Embodiment is demonstrated. FIG. 3 is an explanatory diagram of a method for manufacturing the reinforcing tool 10 according to the present embodiment. First, as shown in FIG. 3A, after the wire 12 is wound around the dummy material d, the wire 12 is wound around the dummy material d by pressing and fixing the starting end portion of the wire 12 with the cylindrical fixing ring 28. Next, as shown in FIG. 3B, the distance between the wires 12 is increased while applying a tensile force to the wire 12 wound around the dummy material d, so that the wire 12 is further spaced in the axial direction of the dummy material d. The wires 12 to be aligned are narrowed down. Here, wire winding and narrowing are repeated a plurality of times as necessary. As a result, as shown in FIG. 3C, the entire wire 12 is aligned on the outer peripheral surface of the dummy material d in a single turn with no gap.

  Next, the end portion of the wire 12 is pressed by the fixing ring 28, and this state is held for 10 to 20 seconds to fix the shape of the wire 12. As a result, the return action due to the elastic force of the wire 12 can be eliminated, and the hollow cylindrical reinforcing tool 10 (see FIG. 4) having an inner diameter that matches the outer diameter of the dummy material d can be manufactured. Even after being removed from the material d, the same shape as that wound around the dummy material d can be maintained. In this way, by permanently winding the metal wire 12 having a wire diameter of 1.2 mm around the dummy material d having a diameter corresponding to the outer diameter of the boiler tube for a predetermined time, the wire 12 can be easily given a permanent strain. .

  FIG. 4 is a schematic diagram showing the reinforcing tool 10 after being removed from the dummy material d. The reinforcing tool 10 has an inner diameter substantially the same as the outer diameter of the dummy material d, and has a hollow cylindrical winding rod with no gap. As the dummy material d, a dummy material having an outer diameter slightly smaller than the outer diameter of the boiler tube to be reinforced is used. Therefore, the inner diameter of the reinforcing tool 10 is slightly smaller than the outer diameter of the boiler tube to be reinforced.

  Next, the reinforcement method of the bulging part e using the reinforcement tool 10 is demonstrated. FIG. 5 is an explanatory diagram of a method for reinforcing the bulging portion e using the reinforcing tool 10. As shown in FIG. 5, first, the wire 12 a located at the center of the reinforcing tool 10 is wound around the boiler tube t. Next, the upper region 10a is wound around the boiler tube t by turning the upper region 10a around the boiler tube t in the direction of arrow a from the wire 12a. Furthermore, the lower region 10b is wound around the boiler tube t by similarly turning the lower region 10b around the boiler tube t in the arrow b direction from the wire 12a.

  Next, as shown in FIG. 1, the reinforcing tool 10 is moved in the tube axis direction of the boiler tube t so that the bulging portion e is positioned at the center of the reinforcing tool 10. Here, the inner diameter of the reinforcing tool 10 is formed in advance smaller than the outer diameter of the boiler tube t. For this reason, the reinforcing tool 10 is not displaced due to frictional force, and the reinforcing tool 10 can be easily positioned. Next, the reinforcing tool 10 is squeezed so as to be in close contact with the bulging portion e to be in a tightened state. . Examples of the fixing method include spot welding w, fixing using a frictional force by pressing, and tightening with a band 14. Next, if necessary, the side surface of the reinforcing tool 10 is covered with a metal thin plate from the top by spot welding w.

  By the way, in the reinforcement method of the boiler tube t mentioned above, there exists a problem from which it becomes difficult to wind the reinforcement tool 10 uniformly on the outer peripheral surface shape of the boiler tube t. In particular, when the reinforcing tool 10 is provided on the boiler tube t arranged in the narrow portion by the above-described reinforcing method, the reinforcing tool 10 may not necessarily be uniformly tightened on the boiler tube t. Moreover, when the area of the bulging part e is large, it is necessary to tighten the reinforcing tool 10 while repeating spot welding for the portion where the reinforcing tool 10 is tightened, and there is a problem that the fixing of the reinforcing tool 10 becomes complicated. is there.

  Therefore, the present inventors can tighten the reinforcing tool 10 evenly to the boiler tube t arranged in the narrow part by using the boiler tube reinforcing tool fixing jig described below. As a result, the present invention has been completed. Hereinafter, the boiler tube reinforcing tool fixing jig according to the present embodiment will be described in detail.

  FIG. 6A is a front view of the boiler tube reinforcing tool fixing jig 100 according to the present embodiment, and FIG. 6B is a plan view of the boiler tube reinforcing tool fixing jig 100 according to the present embodiment. 6C is a cross-sectional view taken along line AA in FIG. 6B.

  As shown in FIGS. 6A to 6C, a boiler tube reinforcing tool fixing jig 100 according to the present embodiment is a boiler tube reinforcing tool 10 made of a wire such as a metal wire that can be wound around a boiler tube t. Is wound around the boiler tube t and fastened and fixed. The boiler tube reinforcement fixture fixing jig 100 has a generally annular shape, and has a jig body 101 provided with a through hole H through which the boiler tube t can be inserted at the center. On the inner peripheral surface of the through hole H of the jig main body 101, a groove portion 101a having a width capable of accommodating the wire rod of the reinforcing tool 10 is spirally provided. In the boiler tube reinforcing tool fixing jig 100, the boiler tube t in which the boiler tube reinforcing tool 10 is tightened is inserted into the through hole H, and the boiler tube reinforcing tool is along the groove portion 101 a of the jig main body 101. By tightening 10, it becomes possible to fix the boiler tube reinforcing tool 10 easily and uniformly even at the bulging portion e of the boiler tube t arranged at a narrow interval in the narrow portion.

  Moreover, the boiler tube reinforcing tool fixing jig 100 according to the present embodiment includes a first member 102 and a second member 103 having a substantially half-moon shape in a plan view having a predetermined thickness. The first member 102 and the second member 103 are provided so as to form the through hole H by fixing the first member 102 and the second member 103 together by the fixing member 104. In the present embodiment, the jig body 101 is provided with screw holes 102a and 103a penetrating the first member 102 and the second member 103, and screws as the fixing member 104 are screwed into the screw holes 102a and 103a. By joining, the 1st member 102 and the 2nd member 103 are fixed integrally. Thereby, since the jig main body 101 can be attached to the boiler tube t in a state where the jig main body 101 is disassembled into the first member 102 and the second member 103, the boiler tube t arranged at a narrow interval in the narrow portion. However, the boiler tube reinforcing tool 10 can be easily tightened by the boiler tube reinforcing tool fixing jig 100.

  In the boiler tube reinforcing tool fixing jig 100 according to the present embodiment, it is preferable that the inner diameter dimension of the through hole H and the outer diameter dimension of the boiler tube t substantially coincide with each other. By comprising in this way, since the space | interval according to the wire diameter of the metal wire of the boiler tube t can be made between the bottom part of the groove part 101a of the through-hole H of the jig | tool main body 101, and the outer peripheral surface of the boiler tube t, it is a boiler. The tube reinforcing tool 10 can be uniformly tightened with respect to the boiler tube t.

  6D and 6E are explanatory views of the groove portion 101a of the boiler tube reinforcing tool fixing jig 100 according to the present embodiment. As shown in FIG. 6D, the groove 101a has a shape in which a plurality of grooves 101a (three in the example shown in FIG. 6D) having a predetermined width d1 are provided with a predetermined interval d2. As shown in FIG. 6E, the groove 101a may have a shape in which a plurality of grooves 101a are continuously provided.

  Next, a boiler tube reinforcing method according to the present embodiment will be described. The boiler tube reinforcement method according to the present embodiment is a boiler tube reinforcement method using the boiler tube reinforcement fixture 100 according to the above embodiment. The boiler tube reinforcing method according to the present embodiment includes a winding step of winding the boiler tube reinforcing tool 10 around the outer peripheral surface of the boiler tube t, and the boiler tube t is inserted into the through hole H of the jig body 101. A tightening step of tightening the boiler tube t with the boiler tube reinforcing tool 10 while rotating the jig body 101 in the circumferential direction of the boiler tube t with the tube axis direction of the boiler tube t as a rotation axis.

  7A and 7B are explanatory diagrams of the boiler tube reinforcing method according to the present embodiment. In the winding process, the operator winds the boiler tube reinforcing tool 10 around the boiler tube t on the outer peripheral surface of the boiler tube t as shown in FIG. Here, as shown in FIG. 7A, the boiler tube reinforcing tool 10 before being fastened to the outer peripheral surface of the boiler tube t is fixed in a distorted state with a slight gap between the metal wires. .

  Next, in the tightening step, the jig body 10 is arranged on one end side of the boiler tube reinforcement 10 in a state where the boiler tube t is inserted into the through hole H of the jig body 101. Then, the jig body 101 is gradually moved from one end side to the other end side of the boiler tube t while rotating in the circumferential direction of the boiler tube t with the tube axis direction of the boiler tube t as a rotation axis. As a result, as shown in FIG. 7B, the metal wire 12 constituting the boiler tube reinforcement 10 moves on the outer peripheral surface of the boiler tube t while sequentially moving in the groove portion 101 a provided in the through hole H of the jig body 101. Tightened and fixed. As a result, the boiler tube reinforcement 10d after tightening is in a state of being tightened more uniformly than the boiler tube reinforcement 10c before tightening.

  In the boiler tube reinforcement method described above, a fixing step of fixing both ends of the boiler tube reinforcing tool fastened to the boiler tube t after the fastening step to the outer peripheral surface of the boiler tube t may be performed. As a result, it is possible to fix both ends of the boiler tube reinforcing tool 10 after tightening, so that the boiler tube reinforcing jig can be wound more uniformly around the boiler tube. Both ends of the tightened boiler tube t can be fixed, for example, by spot welding w of the boiler tube reinforcing tool and the boiler tube as shown in FIG.

  In the tightening process, it is effective to fix the boiler tube reinforcing tool 10 with the fixing tool 200 shown in FIG. 8 in order to prevent loosening of the tightened portion when the boiler tube reinforcing tool 10 is tightened. is there. Thereby, since the loosening of the boiler tube reinforcing tool 10 in the tightened region can be prevented, the boiler tube reinforcing tool 10 can be temporarily fixed even when the tightening portion is long. FIG. 8 is a schematic diagram showing an example of a fixing tool used in the boiler tube reinforcing method according to the present embodiment. As shown in FIG. 8, the fixing tool 200 according to the present embodiment includes a band-shaped band portion 201 and a fixing portion 202 that fixes one end side and the other end side of the band portion 201. In the fixing tool 200, the boiler tube reinforcing tool 10 can be temporarily fixed to the boiler tube t by fastening the band portion 201 fixed in an annular shape by the fixing portion 202 to one end of the boiler tube reinforcing tool 10. It becomes possible.

  FIG. 9 is an explanatory diagram of a tightening process of the boiler tube reinforcing method using the fixing tool 200 shown in FIG. As shown in FIG. 9, in the tightening step, it is preferable that one end of the boiler tube reinforcing tool 10 is fixed by the fixing tool 200 and the boiler tube reinforcing tool 10 is tightened by the jig body 101 from the fixed one end side. . Thereby, since the movement of the boiler tube reinforcement tool 10 accompanying the clamp | tightening of the boiler tube reinforcement tool 10 by the jig | tool main body 101 can be prevented, it becomes possible to clamp the boiler tube reinforcement tool 10 more uniformly. In this case, when the tightening range of the boiler tube reinforcing tool 10 is wide, as shown in the example shown in FIG. After the portion 10 is tightened, the boiler tube reinforcing tool 10 may be tightened by temporarily fixing the central portion of the tightening range of the boiler tube reinforcing tool 10 with another fixing tool 200. As a result, even when the tightening range of the boiler tube reinforcing tool 10 extends over a wide range, the boiler tube reinforcing tool 10 can be uniformly tightened with respect to the boiler tube t over a wide range.

  As described above, according to the present embodiment, the boiler tube t wound around the boiler tube reinforcing tool 10 is inserted into the through hole of the jig body, and then the tube axis direction of the boiler tube t is used as the rotation axis. The boiler tube reinforcing tool 10 can be fastened to the boiler tube t only by moving the jig body 101 from one end side of the boiler tube reinforcing tool 10 to the other end side while rotating in the circumferential direction of the boiler tube t. As a result, the boiler tube reinforcing tool 10 is fixed to the boiler tube t at a uniform interval according to the width of the groove 101a spirally provided along the inner peripheral surface of the through hole H even if different installers implement it. can do. Moreover, since the jig main body 101 is small compared with the case where it constructs using the fixing device for the boiler tube reinforcements 10, it can be easily applied to the boiler tube t arranged in a narrow space at a narrow interval. It becomes possible to wind the boiler tube reinforcement 10. Therefore, even the bulging portion e of the boiler tube t arranged at a narrow interval (for example, 60 mm) in the narrow portion is simple, short delivery time, low cost, and uniform with no individual differences among workers. A boiler tube reinforcing method capable of fixing the tube reinforcing tool can be realized.

  In addition, according to the boiler tube reinforcing tool fixing jig and the boiler tube reinforcing method according to the present embodiment, the winding operation for the bulging portion e generated in the boiler tube group arranged at a narrow interval is easy. Therefore, the reinforcement work can be completed in a short time. Further, since only the reinforcing tool 10 is used, the cost can be reduced, and the present invention can be applied to boiler tubes having any region, shape, and pipe diameter regardless of the straight tube portion and the bend portion of the boiler tube. Moreover, since it can wind uniformly between adjacent metal wires, a pressing force with respect to the bulging part e can be raised.

  In addition, in the said embodiment, although the example which fastens the boiler tube reinforcement tool 10 with respect to the bulging part e of the boiler tube t was demonstrated, this invention is not limited to this structure. The boiler tube reinforcing tool fixing jig and the boiler tube reinforcing method according to the above-described embodiment are, for example, applied to a specific region of a boiler tube discovered by inspection of a metal structure and not bulging. Is possible. Moreover, even if the boiler tube reinforcement fixture fixing jig which concerns on the said embodiment is the bulging part e of the boiler tube t, the internal diameter of the boiler tube reinforcement fixture fixing jig is the bulging part e of the boiler tube t. If it is less than the outer diameter, the boiler tube reinforcing jig 10 can be applied.

  Moreover, in the said embodiment, although the example which tightens the boiler tube reinforcement 10 using the boiler tube reinforcement fixture fixing jig 100 about all the specific area | regions including the bulging part e of the boiler tube t was demonstrated, this book The invention is not limited to this configuration. For example, as shown in FIG. 1, the boiler tube reinforcing tool fixing jig 100 is used for the regions A1 and A3 in the vicinity of the bulging portion e of the boiler tube t and the bulging amount is small. The boiler tube reinforcing tool 10 may be tightened without using the boiler tube reinforcing tool fixing jig 100 in the region A2 where the reinforcing tool 10 is tightened and the bulging amount is large. Even in this case, if the amount of bulging of the boiler tube t in the region A2 is within the inner diameter of the through hole H of the boiler tube reinforcement fixture fixing jig 100, the boiler tube reinforcement fixture fixing jig 100 is used. It is possible to construct using.

DESCRIPTION OF SYMBOLS 10 Reinforcing tool 10a Upper region 10b Lower region 12, 12a Wire 14 Band 20 Positioner 22 Chuck 24 Drive motor 26 Leg 28 Fixed ring 100 Boiler tube reinforcing tool fixing jig 101 Jig body 102 First member 102a Screw hole 103 First 2 member 103a screw hole 104 fixing member 200 fixing member 201 band part 202 fixing part d dummy material e bulging part t boiler tube w spot welding

Claims (6)

A boiler tube reinforcing tool fixing jig for fixing a boiler tube reinforcing tool made of a wire that can be wound around a boiler tube, by winding the boiler tube around the boiler tube,
A jig body having a through-hole through which the boiler tube can be inserted;
A boiler tube reinforcing tool fixing jig, comprising a groove portion provided in a spiral shape on an inner peripheral surface of the through hole and having a width capable of accommodating the wire of the boiler tube reinforcing tool.   2. The boiler tube reinforcing tool fixing jig according to claim 1, wherein the jig main body includes a first member and a second member that form the through hole by being fixed integrally by a fixing tool.   The boiler tube reinforcing tool fixing jig according to claim 1 or 2, wherein an inner diameter of the through hole is substantially the same as an outer diameter of the boiler tube. A boiler tube reinforcing method using the boiler tube reinforcing tool fixing jig according to any one of claims 1 to 3,
A winding step of winding the boiler tube reinforcement on the outer peripheral surface of the boiler tube;
The boiler tube reinforcing tool is inserted through the through hole of the jig body, and the jig body is rotated in the circumferential direction of the boiler tube with the tube axis direction of the boiler tube as a rotation axis. And a tightening step of tightening and fixing to the boiler tube.   Furthermore, the boiler tube reinforcement method of Claim 4 including the fixing process which fixes the both ends of the said boiler tube reinforcement which fastened the said boiler tube to the outer peripheral surface of the said boiler tube.   The method for reinforcing a boiler tube according to claim 4 or 5, wherein one end of the boiler tube reinforcing tool is fixed with a fixing tool, and the jig main body is tightened to the boiler tube reinforcing tool from the fixed one end side. .

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