JP7613986B2 - Tube body joint structure and chimney repair method - Google Patents

Description

This disclosure relates to a tube joint structure and a chimney repair method.

Chimneys in which multiple barrels are joined in the vertical direction are known (see, for example, Patent Document 1). Chimneys in which multiple barrels are made of fiber-reinforced plastic are lightweight, and there are configurations in which they are supported by being suspended from, for example, a steel tower.

In such a suspended chimney, in order to prevent the joined tube bodies from falling off, for example, ring members are attached to the outer circumferential surfaces of the upper and lower tube bodies, and connecting members are arranged to connect the ring members in the vertical direction. Also, in order to support the connecting members, a configuration is adopted in which a stacking member capable of supporting the ring members is provided on the outer circumferential surface of each tube body below each ring member.

JP 2013-122338 A

In the above configuration, the laminated members may deteriorate and peel off as the chimney ages. Peeling of the laminated members may reduce the inhibitory force that prevents the tube body from falling off.

The present disclosure has been made in consideration of the above, and aims to provide a tube joint structure and a chimney repair method that can prevent the tube from falling off.

The tube body joining structure according to the present disclosure is a tube body joining structure for a chimney in which a plurality of tube bodies made of fiber-reinforced plastic are joined in the vertical direction and supported in a suspended state, and includes a first tube body, a second tube body arranged under the first tube body and joined to the first tube body via a resin material, a first ring member arranged on the outer peripheral surface of the first tube body, a second ring member arranged on the outer peripheral surface of the second tube body, and a connecting mechanism having a connecting member connecting the first ring member and the second ring member, a first ring lower member formed using a resin material and arranged below the first ring member on the outer peripheral surface of the first tube body, and a penetrating member provided to penetrate the first tube body in the radial direction between the first ring lower member and the first tube body.

The chimney repair method according to the present disclosure is a method for repairing a chimney in which a plurality of tube bodies made of fiber-reinforced plastic are joined in the vertical direction and supported by hanging, the chimney comprising a first tube body, a second tube body arranged at the bottom of the first tube body and joined to the first tube body via a resin material, a first ring member arranged on the outer peripheral surface of the first tube body, a second ring member arranged on the outer peripheral surface of the second tube body, a connecting mechanism having a connecting member connecting the first ring member and the second ring member, and a first ring lower member formed using a resin material and arranged below the first ring member on the outer peripheral surface of the first tube body, and includes a through hole forming process for forming a through hole that penetrates the first tube body in the radial direction between the first ring lower member and the first tube body, and a through member arranging process for arranging a through member in the through hole so as to straddle between the first ring lower member and the first tube body.

This disclosure makes it possible to prevent the barrel from falling off.

FIG. 1 is a diagram showing an example of a chimney having a tube-and-shell joint structure according to this embodiment. FIG. 2 is an external view showing an example of a tube body joining structure according to the present embodiment. FIG. 3 is a diagram showing a configuration along the AA cross section (longitudinal cross section) in FIG. FIG. 4 is an enlarged view of a main part in FIG. FIG. 5 is a perspective view illustrating an example of a penetrating member. FIG. 6 is a diagram showing a configuration along the cross section BB in FIG. FIG. 7 is a process diagram showing an example of a chimney repair method. FIG. 8 is a process diagram showing an example of a chimney repair method. FIG. 9 is a process diagram showing an example of a chimney repair method. FIG. 10 is a process diagram showing an example of a chimney repair method. FIG. 11 is a diagram (longitudinal cross-sectional view) showing an example of a tube body joining structure according to a modified example.

Below, an embodiment of the tube joint structure and chimney repair method according to the present disclosure will be described with reference to the drawings. Note that the present invention is not limited to this embodiment. Furthermore, the components in the following embodiments include those that are replaceable and easy for a person skilled in the art, or those that are substantially the same.

Figure 1 is a diagram showing an example of a chimney having a tube-body joint structure according to this embodiment. As shown in Figure 1, the chimney 100 is configured by joining multiple tube bodies 10 made of fiber-reinforced plastic in the vertical direction. The chimney 100 is supported by being suspended from, for example, a steel tower 101. The chimney 100 is supported horizontally at multiple support positions in the vertical direction of the steel tower 101.

Figure 2 is an external view showing an example of a tube body joining structure 50 according to this embodiment. Figure 3 is a view showing the configuration along the A-A section (longitudinal section) in Figure 2. As shown in Figures 2 and 3, the chimney 100 has a tube body joining structure 50 in which multiple tube bodies 10 are joined together in the vertical direction. Hereinafter, when distinguishing between the tube bodies connected in the vertical direction, the tube body arranged on the upper side of the tube body joining structure 50 will be referred to as the first tube body 11, and the tube body arranged on the lower side of the tube body joining structure 50 will be referred to as the second tube body 12.

The tube body joining structure 50 includes a first tube body 11, a second tube body 12, a connecting mechanism 20, a laminated member 30, and a penetrating member 40.

The first tube body 11 is formed using fiber-reinforced plastic. The lower end 11a of the first tube body 11 is joined to the second tube body 12.

The second tube body 12 is formed using fiber-reinforced plastic, like the first tube body. The second tube body 12 has a recess 12b at the upper end 12a. The lower end 11a of the first tube body 11 is inserted into the recess 12b. A resin material 13 is filled between the recess 12b and the lower end 11a.

The first tube body 11 and the second tube body 12 are arranged with the lower end 11a and the upper end 12a overlapping in the vertical direction. The lower end 11a of the first tube body 11 and the upper end 12a of the second tube body 12 each form an overlapping portion when the first tube body 11 and the second tube body 12 overlap in the vertical direction.

The connecting mechanism 20 has a first ring member 21, a second ring member 22, and a connecting member 23. The first ring member 21 is attached to the outer periphery of the first tube body 11 around the entire circumference. The second ring member 22 is attached to the outer periphery of the second tube body 12 around the entire circumference. The connecting member 23 connects the first ring member 21 and the second ring member 22 in the vertical direction.

The laminated member 30 is formed using a resin material and is laminated on the outer peripheral surface of the first tube body 11 and the second tube body 12. The laminated member 30 has a first laminated member 31 and a second laminated member 32. The first laminated member 31 has a first ring upper member 31a arranged above the first ring member 21 and a first ring lower member 31b arranged below the first ring member 21. The first ring lower member 31b may be configured to support the first ring member 21. The second laminated member 32 has a second ring upper member 32a arranged above the second ring member 22 and a second ring lower member 32b arranged below the second ring member 22. The second ring lower member 32b may be configured to support the second ring member 22.

The penetrating member 40 is provided between the first ring lower member 31b of the laminated member 30 and the first tube body 11, penetrating the first tube body 11 in the radial direction. FIG. 4 is an enlarged view of the main part in FIG. 3. FIG. 4 shows an enlarged view of the part where the penetrating member 40 is provided. As shown in FIG. 4, the penetrating member 40 is disposed between the first ring lower member 31b and the first tube body 11. The penetrating member 40 supports the first ring lower member 31b and the first tube body 11.

The penetrating member 40 is disposed in the through hole 45. The through hole 45 penetrates between the first ring lower member 31b and the first tube body 11 in the radial direction of the first tube body 11, and is formed in a tapered shape that reduces in diameter from the first ring lower member 31b side to the first tube body 11 side. The penetrating member 40 is joined to the first ring lower member 31b and the first tube body 11 via a resin filler 46 inserted between the penetrating member 40 and the through hole 45.

Figure 5 is a perspective view showing a typical example of the penetrating member 40. As shown in Figure 5, the penetrating member 40 is cylindrical and has a double structure having a center side member 41 and an outer peripheral side member 42. With this configuration, the load from the first tube body 11 is not biased toward the center side member 41, and can be transmitted as an evenly distributed load to the entire penetrating member 40 including the center side member 41 and the outer peripheral side member 42. The penetrating member 40 has a configuration in which the center side member 41 protrudes on both sides in the axial direction relative to the outer peripheral side member 42. Note that the penetrating member 40 may have a configuration in which the axial end faces are aligned between the center side member 41 and the outer peripheral side member 42, or may have a configuration in which the center side member 41 is buried inside both axial ends of the outer peripheral side member 42.

The center side member 41 is formed using a metal material. The outer peripheral side member 42 is formed using a resin material and is arranged on the outer periphery of the center side member 41. Since the outer peripheral side member 42 made of a resin material is arranged on the outer periphery of the penetrating member 40, it can be firmly joined to the resin filler 46. Furthermore, since the center side member 41 made of a metal material is arranged on the center side of the penetrating member 40, it is possible to ensure higher rigidity than when the entire outer peripheral side member is made of resin.

The penetrating member 40 is configured by joining dissimilar materials between a central member 41 made of a metal material and an outer peripheral member 42 made of a resin material. The penetrating member 40 is formed in advance, for example, in a factory, in order to improve the quality of the joining structure in which dissimilar materials are joined together.

Figure 6 is a diagram showing the configuration along the B-B cross section (transverse cross section) in Figure 2. As shown in Figure 6, multiple penetrating members 40 are arranged in the circumferential direction of the first cylindrical body 11. Figure 6 shows a configuration in which the penetrating members 40 are arranged at 60° intervals in the circumferential direction of the first cylindrical body 11, for example, but is not limited to this.

Next, a chimney repair method for forming the tube body joint structure 50 configured as described above will be described. Figures 7 to 10 are process diagrams showing an example of a chimney repair method. Figure 7 shows an example of a chimney 100A before repair. As shown in Figure 7, the chimney 100A has a first tube body 11, a second tube body 12, a connecting mechanism 20, and a laminated member 30.

From this state, the through hole forming process is carried out as shown in Figure 8. In the through hole forming process, a work scaffold (not shown) is set up at the height position of the first ring lower member 31b, and a through hole 45 is formed so as to penetrate between the first ring lower member 31b and the first tube body 11 in the radial direction of the first tube body 11. In addition, the through hole 45 is formed in a tapered shape that decreases in diameter from the first ring lower member 31b side to the first tube body 11 side.

After the through hole 45 is formed, a penetrating member placement process is performed as shown in FIG. 9. In the penetrating member placement process, the penetrating member 40 is placed in the through hole 45 so as to straddle the first ring lower member 31b and the first tube body 11. As described above, the penetrating member 40 is formed in advance in a factory or the like. In the penetrating member placement process, this preformed penetrating member 40 is placed in the through hole 45. At this time, a spacer (not shown) or the like may be placed to maintain the positional relationship between the penetrating member 40 and the inner peripheral surface 45a of the through hole 45. After the penetrating member 40 is placed, as shown in FIG. 10, a resin filler 46 is filled between the inner peripheral surface 45a of the through hole 45 and the penetrating member 40 to fix the penetrating member 40.

As described above, the tube body joining structure 50 according to this embodiment is a chimney tube body joining structure 50 in which a plurality of tube bodies 10 made of fiber-reinforced plastic are joined in the vertical direction and supported by hanging, and includes a first tube body 11, a second tube body 12 arranged at the bottom of the first tube body 11 and joined to the first tube body 11 via a resin material, a first ring member 21 arranged on the outer circumferential surface of the first tube body 11, a second ring member 22 arranged on the outer circumferential surface of the second tube body 12, a connecting mechanism 20 having a connecting member 23 connecting the first ring member 21 and the second ring member 22, a first ring lower member 31b formed using a resin material and arranged at least below the first ring member 21 on the outer circumferential surface of the first tube body 11, and a penetrating member 40 provided to penetrate the first tube body 11 in the radial direction between the first ring lower member 31b and the first tube body 11.

Therefore, since the penetrating member 40 is provided between the first ring lower member 31b and the first tube body 11 and penetrates the first tube body 11 in the radial direction, the shear resistance of the penetrating member 40 can prevent the first ring lower member 31b from falling off. This makes it possible to prevent the tube bodies from falling off, i.e., the second tube body 12 from falling off from the first tube body 11.

In the tube body joining structure 50 according to this embodiment, the penetrating member 40 is cylindrical and has a double structure of a center side member 41 formed of a metal material and an outer periphery side member 42 formed of a resin material and arranged on the outer periphery of the center side member 41. With this configuration, the load from the first tube body 11 can be transmitted as an evenly distributed load to the entire penetrating member 40 including the center side member 41 and the outer periphery side member 42 without being biased toward the center side member 41. In addition, since the outer periphery side member 42 made of a resin material is arranged on the outer periphery side of the penetrating member 40, it can be firmly joined with the resin filler 46. In addition, since the center side member 41 made of a metal material is arranged on the center side of the penetrating member 40, higher rigidity can be ensured compared to when the entire outer periphery side member is made of resin.

In the tube body joining structure 50 according to this embodiment, the penetrating member 40 is disposed in a through hole 45 that passes between the first ring lower member 31b and the first tube body 11 in the radial direction of the first tube body 11, and the penetrating member 40 is joined to the first ring lower member 31b and the first tube body 11 via a resin filler 46 that is inserted between the through hole 45. This configuration allows the penetrating member 40 to be firmly fixed.

In the tube body joining structure 50 according to this embodiment, the through hole 45 is formed in a tapered shape that reduces in diameter from the first ring lower member 31b side to the first tube body 11 side. This makes it easier to fill the resin filler 46 between the penetrating member 40 and the through hole 45.

In the tube body joining structure 50 according to this embodiment, multiple penetrating members 40 are arranged in the circumferential direction of the first tube body 11. Therefore, it is possible to prevent the first ring lower member 31b from falling off over the entire circumferential direction of the first tube body 11.

The technical scope of the present invention is not limited to the above embodiment, and appropriate modifications can be made without departing from the spirit of the present invention. For example, the above embodiment has been described with an example of a configuration in which a penetrating member 40 is provided so as to penetrate between the first ring lower member 31b and the first tube body 11, but the present invention is not limited to this.

Figure 11 is a diagram (longitudinal cross-sectional view) showing an example of a tube body joining structure 50B according to a modified example. As shown in Figure 11, the tube body joining structure 50B is configured to include a tube body penetrating member 60 and a penetrating member 70 in addition to the configuration of the tube body joining structure 50 described above. One of the tube body penetrating member 60 and the penetrating member 70 may be omitted.

The barrel-penetrating member 60 is provided by penetrating radially through the lower end 11a and upper end 12a, which are the overlapping portions of the first barrel 11 and the second barrel 12, and the resin material 13. The barrel-penetrating member 60 has a configuration similar to the penetrating member 40 described above. The barrel-penetrating member 60 is disposed in a through hole 65 that penetrates radially between the first barrel 11 and the second barrel 12. The barrel-penetrating member 60 is joined to the first barrel 11 and the second barrel 12 via a resin filler 66 inserted between the through hole 65. This configuration allows the barrel-penetrating member 60 to be firmly fixed.

The barrel-penetrating member 60 has a center side member 61 formed, for example, using a metal material, and an outer periphery side member 62 formed, for example, using a resin material. With this configuration, the load from the first barrel 11 is not biased toward the center side member 61, and can be transmitted as an evenly distributed load to the entire barrel-penetrating member 60 including the center side member 61 and the outer periphery side member 62.

In addition, since the outer peripheral member 62 made of a resin material is disposed on the outer peripheral side of the barrel-penetrating member 60, it can be firmly bonded to the resin filler 46. In addition, since the central member 61 made of a metal material is disposed on the central side of the barrel-penetrating member 60, it is possible to ensure higher rigidity than when the entire outer peripheral member is made of resin.

On the other hand, the penetrating member 70 is provided between the second ring upper member 32a of the laminated member 30 and the second tube body 12, penetrating the second tube body 12 in the radial direction. The penetrating member 70 has a configuration similar to the penetrating member 40 described above. The penetrating member 70 is disposed in a through hole 75 that penetrates the second tube body 12 in the radial direction between the second ring upper member 32a and the second tube body 12. The penetrating member 70 is joined to the second ring upper member 32a and the second tube body 12 via a resin filler 76 inserted between the through hole 75. This configuration allows the penetrating member 70 to be firmly fixed.

The penetrating member 70 also has a center side member 71 formed, for example, using a metal material, and an outer peripheral side member 72 formed, for example, using a resin material. With this configuration, the load from the second tube body 12 is not biased toward the center side member 71, and can be transmitted as an evenly distributed load to the entire penetrating member 70, including the center side member 71 and the outer peripheral side member 72.

In addition, since the outer peripheral member 72 made of a resin material is disposed on the outer peripheral side of the penetrating member 70, it can be firmly bonded to the resin filler 76. In addition, since the central member 71 made of a metal material is disposed on the central side of the penetrating member 70, it is possible to ensure higher rigidity than when the entire outer peripheral member is made of resin.

In this way, the tube body joining structure 50B according to the modified example is provided with a tube body penetrating member 60 that penetrates radially between the first tube body 11 and the second tube body 12 in addition to the configuration of the tube body joining structure 50 according to the above embodiment. This allows the first tube body 11 and the second tube body 12 to be locked together. This more reliably prevents the second tube body 12 from falling off the first tube body 11.

In addition to the configuration of the tube body joining structure 50 according to the above embodiment, the modified tube body joining structure 50B is provided with a penetrating member 70 that penetrates between the second ring upper member 32a and the second tube body 12 in the radial direction of the second tube body 12. This makes it possible to prevent the second ring upper member 32a from falling off due to the shear resistance of the penetrating member 70. This makes it possible to prevent the tube bodies from falling off, i.e., the second tube body 12 from falling off from the first tube body 11.

10 Tube body 11 First tube body 11a Lower end 12 Second tube body 12a Upper end 12b Recess 13 Resin material 20 Connection mechanism 21 First ring member 22 Second ring member 23 Connection member 30 Laminated member 31 First laminated member 31a First ring upper member 31b First ring lower member 32 Second laminated member 32a Second ring upper member 32b Second ring lower member 40, 70 Penetrating member 41, 61, 71 Center side member 42, 62, 72 Outer periphery side member 45, 65, 75 Through hole 45a Inner periphery surface 46, 47, 66, 76 Resin filler 50, 50B Tube body joint structure 60 Tube body penetrating member 100, 100A Chimney 101 Steel tower

Claims (7)

A chimney barrel joint structure in which a plurality of barrels made of fiber-reinforced plastic are joined in the vertical direction and supported in a suspended state,
A first cylinder body;
A second body is disposed under the first body and joined to the first body via a resin material;
a connecting mechanism including a first ring member disposed on an outer peripheral surface of the first cylindrical body, a second ring member disposed on an outer peripheral surface of the second cylindrical body, and a connecting member connecting the first ring member and the second ring member;
a first ring lower member formed of a resin material and disposed below the first ring member on an outer circumferential surface of the first cylindrical body;
a penetrating member provided between the first ring lower member and the first barrel so as to penetrate the first barrel in a radial direction. The tube joint structure according to claim 1, wherein the penetrating member is cylindrical and has a double structure consisting of a central side member formed using a metal material and an outer peripheral side member formed using a resin material and arranged on the outer periphery of the central side member. The penetrating member is disposed in a through hole that penetrates between the first ring lower member and the first cylindrical body in a radial direction of the first cylindrical body,
The tube body joining structure according to claim 1 or 2, wherein the penetrating member is joined to the first ring lower member and the first tube body via a resin filler material inserted between the penetrating member and the through hole. The tube body joining structure according to claim 3 , wherein the through hole is formed in a tapered shape whose diameter decreases from the first ring lower member side to the first tube body side. The tube body joining structure according to claim 1 , wherein a plurality of the penetrating members are arranged in a circumferential direction of the first tube body. The first cylindrical body and the second cylindrical body are joined to each other so as to have overlapping portions that overlap each other in the vertical direction,
The tube body joining structure according to any one of claims 1 to 5, further comprising a tube body penetrating member provided so as to penetrate radially between the first tube body and the second tube body. A method for repairing a chimney in which a plurality of tube bodies made of fiber-reinforced plastic are joined in the vertical direction and supported by hanging, comprising the steps of:
The chimney is
A first cylinder body;
A second body is disposed under the first body and joined to the first body via a resin material;
a connecting mechanism including a first ring member disposed on an outer peripheral surface of the first cylindrical body, a second ring member disposed on an outer peripheral surface of the second cylindrical body, and a connecting member connecting the first ring member and the second ring member;
a first ring lower member formed of a resin material and disposed below the first ring member on an outer circumferential surface of the first cylindrical body;
Equipped with
a through hole forming step of forming a through hole that passes between the first ring lower member and the first cylindrical body in a radial direction of the first cylindrical body;
a penetrating member placement step of placing a penetrating member in the through hole so as to straddle between the first ring lower member and the first barrel.

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