JP6258068B2 - Reinforcing member, piping seal structure and building - Google Patents

Description

  The present invention relates to a reinforcing member provided in a bellows member, a sealing structure for piping, and a building.

  Conventionally, a pipe penetration part structure of a reactor containment vessel which is a structure around a pipe penetrating a concrete shielding wall is known (see, for example, Patent Document 1). This pipe penetration part structure is provided with the external cladding tube extrapolated by piping, and the external cladding pipe is divided | segmented into plurality and the bellows as an expansion joint is provided between each division | segmentation part.

Japanese Utility Model Publication No. 1-000787

  By the way, in the bellows, crests and troughs are alternately provided in the axial direction, and when compressively deformed in the axial direction, a plurality of crests are inclined with respect to the compression direction, thereby causing buckling. There is a case. When compressive deformation is performed while buckling the bellows, the load due to the compressive deformation increases at the buckled portion.

  Here, in order to suppress the buckling of the bellows, it is conceivable to provide a reinforcing ring as a reinforcing member. By the way, the reinforcing wheel is provided in an annular shape along the periphery of the container in order to increase the rigidity against the internal pressure of the container. For this reason, when a strong wheel is provided on the outer periphery of the bellows, a strong wheel is provided in the valley of the bellows in order to increase the rigidity against the internal pressure of the bellows. However, if the reinforcing wheel is provided in the valley of the bellows, it is difficult to suppress the buckling of the bellows because the inclination of the peak with respect to the compression direction is not regulated.

  Then, this invention makes it a subject to provide the reinforcement member, the sealing structure for piping, and a building which can suppress the buckling of a bellows member, allowing compression deformation of a bellows member.

  The reinforcing member of the present invention is a reinforcing member that reinforces a cylindrical bellows member in which peak portions protruding outward in the radial direction and valley portions protruding inward in the radial direction are alternately formed along the axial direction. It is a member, It has a control surface which contact | abuts to the said peak part at the time of the compression deformation of the said bellows member, and controls the inclination of the said peak part with respect to a compression direction.

  According to this configuration, when the bellows member is compressed and deformed in the compression direction (axial direction), the inclination of the peak portion of the bellows member can be regulated by the regulation surface. For this reason, since the buckling of a bellows member can be suppressed, the increase in the load by buckling can be suppressed. The bellows member may be an existing member or a new member, and is not particularly limited.

  The bellows member is provided on the outer peripheral side of the trough between the crests adjacent in the axial direction of the bellows member, and is annularly formed along the outer periphery of the trough with a predetermined gap from the trough in the radial direction. The reinforcing ring is formed in the gap between the reinforcing ring and the trough, and protrudes from the reinforcing ring toward the trough to position the reinforcing ring with respect to the trough It is preferable that the regulating surface is an outer peripheral surface of the reinforcing ring.

  According to this configuration, by arranging the reinforcing ring in the valley portion of the bellows member via the spacer, the peak portions on both sides in the axial direction can be brought into contact with the outer peripheral surface of the reinforcing ring. At this time, the reinforcing ring can be positioned at a predetermined position by bringing the spacer into contact with the valley of the bellows member. For this reason, since the space | interval of the peak parts adjacent to an axial direction can be maintained, since the inclination of the peak part with respect to a compression direction can be suppressed, buckling of a bellows member can be suppressed. In addition, the cross-sectional shape cut by the surface orthogonal to the circumferential direction of the reinforcing ring may be a circular cross-section or a cross-sectional rectangle, and is not particularly limited. Further, the reinforcing ring may be formed in an annular shape by curving a rod body, or may be formed in an annular shape by curving a tube body. Furthermore, the spacer may be provided over the entire circumference on the inner peripheral side of the reinforcing ring, or may be provided in part on the inner peripheral side of the reinforcing ring.

  The reinforcing ring has a plurality of divided reinforcing ring pieces that can be divided into a plurality of pieces in the circumferential direction, and is provided at both ends in the circumferential direction of the divided reinforcing ring pieces and adjacent to the divided reinforcing ring pieces in the circumferential direction. It is preferable to further include a connecting member that can be connected.

  According to this configuration, since the reinforcing ring can be divided, a plurality of divided reinforcing ring pieces are arranged in the circumferential direction on the outer periphery of the existing bellows member and connected by the connecting member, thereby reinforcing the existing bellows member. A ring can be attached.

  In addition, the connecting member has a connecting plate provided on the outer peripheral side of the divided reinforcing ring piece, in which a fastening hole is formed, and the fastening hole has a long oval shape along the circumferential direction. preferable.

  According to this configuration, the coupling plates of the two divided reinforcing ring pieces adjacent to each other in the circumferential direction can be overlapped with each other so that the respective fastening holes of the two coupling plates can be overlapped. By fastening the fastening members, it is possible to connect the divided reinforcing ring pieces. At this time, by making the fastening hole into an oval shape, the connection position of the two divided reinforcing ring pieces can be adjusted respectively, so that the position of the reinforcing ring with respect to the bellows member can be adjusted.

  In addition, an end member provided at an end portion in the axial direction of the bellows member is provided, and the restriction surface is a contact surface that contacts the peak portion of the bellows member that contacts the end member. Is preferred.

  According to this configuration, by arranging the end member at the end portion in the axial direction of the bellows member, the peak portion on the end side in the axial direction can be brought into contact with the contact surface of the end member. . For this reason, since the inclination with respect to the compression direction of the peak part in the edge part of an axial direction can be controlled, buckling of a bellows member can be suppressed.

  Moreover, it is preferable that the said contact surface becomes a taper surface which spreads toward the said bellows member in the axial direction of the said bellows member.

  According to this configuration, the contact surface can be a tapered surface that can easily contact the peak portion on the end side in the axial direction of the bellows member. For this reason, the inclination with respect to the compression direction of the peak part in the edge part of an axial direction can be controlled suitably.

  The pipe seal structure of the present invention is a pipe seal structure that seals between a wall of a building in which a through hole penetrating inside and outside is provided, and a pipe inserted through the through hole. An end plate to be attached; an attachment member attached to the through hole; a bellows member provided between the end plate and the attachment member; and the reinforcing member attached to the bellows member. Features.

  According to this configuration, since the bellows member can be compressed and deformed without buckling the bellows member, the load due to the buckling of the bellows member can be reduced, and the service life of the bellows member can be improved. For this reason, the sealing between a wall body and piping can be maintained suitably.

  The building of this invention seals between the wall provided with the through-hole which penetrates inside and outside, the piping penetrated by the said through-hole, the said wall, and the said piping penetrated by the said through-hole. And a piping seal structure as described above.

  According to this configuration, since the bellows member of the pipe seal structure attached between the wall body and the pipe can be suitably compressed and deformed, the sealing by the pipe seal structure can be suitably maintained. .

FIG. 1 is a cross-sectional view of a building in which a piping seal structure according to the present embodiment is provided. FIG. 2 is a front view of the division strengthening member. FIG. 3 is a plan view of the division strengthening member. FIG. 4 is an explanatory diagram showing a positional relationship between the reinforcing ring and the bellows member. FIG. 5 is a two-side view of the end spacer.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same. Furthermore, the constituent elements described below can be combined as appropriate, and when there are a plurality of embodiments, the embodiments can be combined.

  FIG. 1 is a cross-sectional view of a building in which a piping seal structure according to the present embodiment is provided. The building 1 provided with the piping seal structure 10 of the present embodiment is, for example, a building provided in a nuclear facility, and as the building, a building that houses a reactor containment vessel or ancillary equipment adjacent to the reactor containment vessel, or the like. There is.

  As shown in FIG. 1, the building 1 is provided between a wall body 5 in which a through hole 6 penetrating inside and outside is formed, a pipe 7 inserted through the through hole 5, and the wall body 5 and the pipe 7. And a piping seal structure 10.

  The wall body 5 separates the inside and the outside of the building 1, one side (the left side in the figure) is the outside with the wall body 5 sandwiched, and the other side (the right side in the figure) sandwiches the wall body 5. It has become. The through-hole 6 formed in the wall body 5 is a hollow cylindrical round hole serving as a circular opening, and is formed so that the axial direction thereof is a horizontal direction. The pipe 7 is inserted into the through hole 6 and is in an existing state. The pipe 7 is a cylindrical pipe having a circular cross section, and is arranged so that its axial direction is the horizontal direction and the same direction as the through hole 6. The pipe 7 is disposed at the center of the through hole 6.

  Although the building 1 of the present embodiment is a building provided in the nuclear facility, the present invention is not limited to this, and the through hole 6 is formed in the wall body 5, and the existing pipe 7 (hereinafter, existing pipe) is formed in the through hole 6. Any building may be used as long as it is a building 1 through which 7) is inserted. Next, the piping seal structure 10 will be described with reference to FIG.

  As shown in FIG. 1, the piping seal structure 10 is provided on the outside of the building 1 and has a structure capable of sealing between the wall 5 and the existing piping 7. The pipe seal structure 10 includes an end plate 11 attached to the existing pipe 7, an attachment member 12 attached around the through hole 6 of the wall 5, and a bellows member 13 provided between the end plate 11 and the attachment member 12. And. Further, in the piping seal structure 10, the reinforcing member 21 and the end spacer (end member) 41 as reinforcing members are provided on the bellows member 13.

  As shown in FIG. 1, the end plate 11 is attached to the outer periphery on the outside of the pipe 7. The end plate 11 is formed in an annular shape along the circumference of the pipe 7 and is configured to be able to seal between the pipe 7. One end of the bellows member 13 in the axial direction is joined to the end plate 11 by welding or the like. An end spacer 41 described later is disposed between the end plate 11 and the bellows member 13. The end plate 11 can be attached to the pipe 7 later.

  The attachment member 12 is attached around the through hole 6 of the wall body 5 of the building 1 and attached to the outside of the wall body 5. The attachment member 12 is formed in an annular shape along the periphery of the through hole 6, and is configured to be able to seal between the wall body 5. The other end portion of the bellows member 13 in the axial direction is joined to the attachment member 12 by welding or the like. An end spacer 41 described later is disposed between the attachment member 12 and the bellows member 13. In addition, the attachment member 12 becomes a structure attachable with respect to the wall body 5 by retrofitting similarly to the end plate 11. FIG.

  The bellows member 13 is formed in a cylindrical shape and is provided along the outer periphery of the pipe 7, and the axial direction thereof is the same as the pipe axis direction of the pipe 7. The bellows member 13 has one end in the axial direction joined to the end plate 11 and the other end in the axial direction joined to the mounting member 12. The bellows member 13 is sealed between the end plate 11 and the bellows member 13 by joining both ends thereof, and is sealed between the mounting member 12 and the bellows member 13.

  The bellows member 13 includes a peak portion 55 protruding outward in the radial direction, a valley portion 56 protruding inward in the radial direction, and an intermediate portion 57 between the peak portion 55 and the valley portion 56. Mountain portions 55 and valley portions 56 are alternately formed along the axial direction.

  The strengthening member 21 is provided between the adjacent peak portions 55 of the bellows member 13, that is, on the outer peripheral side of the valley portion 56. FIG. 2 is a front view of the division strengthening member. FIG. 3 is a plan view of the division strengthening member. FIG. 4 is an explanatory diagram showing a positional relationship between the reinforcing ring and the bellows member. As shown in FIG. 2, the strengthening member 21 includes a reinforcing ring 31, a spacer 32, and a connecting plate (connecting member) 33.

  The reinforcing ring 31 is formed in an annular shape along the outer periphery of the trough 56 with a predetermined gap from the trough 56. The reinforcing ring 31 has a circular cross-section cut by a plane orthogonal to the circumferential direction, and is formed by curving a round bar. The reinforcing ring 31 includes a plurality (two in this embodiment) of divided reinforcing ring pieces 34 divided into a plurality of parts in the circumferential direction.

  The two divided reinforcing ring pieces 34 are arranged side by side along the outer periphery of the bellows member 13 and are integrated by being connected by a connecting plate 33 described later. As shown in FIG. 3, the divided reinforcing ring piece 34 is formed in a semicircular arc shape.

  The spacer 32 is disposed in a gap between the reinforcing ring 31 and the valley portion 56 of the bellows member 13. One end of the spacer 32 in the radial direction is connected to the inner peripheral side of the reinforcing ring 31, and protrudes from the reinforcing ring 31 toward the trough 56. And the spacer 32 positions the position of the reinforcement ring 31 with respect to the trough 56 of the bellows member 13 by contacting the trough 56 of the bellows member 13. As shown in FIG. 3, the spacer 32 is provided along the inner periphery of the divided reinforcing ring piece 34, and is a plate material having a semicircular shape.

  A pair of connecting plates 33 are provided at both ends in the circumferential direction of each divided reinforcing ring piece 34 and connect the divided reinforcing ring pieces 34 adjacent in the circumferential direction. The connecting plate 33 is formed by arranging two split reinforcing ring pieces 34 side by side along the circumferential direction, so that a pair of connecting plates 33 of one split reinforcing ring piece 34 and a pair of split reinforcing ring pieces 34 of the other split reinforcing ring piece 34 are arranged. The connecting plates 33 are overlapped with each other.

  In addition, a plurality (two in this embodiment) of fastening holes 35 for fastening two overlapping connecting plates 33 are arranged in the connecting plate 33 in the circumferential direction. Fastening members such as bolts and nuts (not shown) are fastened to the fastening holes 35. The fastening hole 35 is an oval-shaped opening that is long along the circumferential direction. The oval shape is a shape including an oval or an ellipse. For this reason, the two overlapping connection plates 33 can adjust the positions of the two overlapping connection plates 33 by adjusting the positions of the fastening holes 35 with respect to the fastening members fastened to the fastening holes 35. Become.

  When attaching the strengthening member 21 configured as described above to the valley portion 56 of the bellows member 13, first, the two divided reinforcing ring pieces 34 are provided side by side in the circumferential direction along the outer periphery of the valley portion of the bellows member 13. . At this time, the spacer 32 is brought into contact with the valley 56 of the bellows member 13, thereby positioning the divided reinforcing ring piece 34 with respect to the valley 56. When the two divided reinforcing ring pieces 34 are provided along the outer periphery of the valley portion 56 of the bellows member 13, the pair of connecting plates 33 of one divided reinforcing ring piece 34 and the pair of connecting pieces of the other divided reinforcing ring piece 34 are connected. The plates 33 are overlapped with each other. The reinforcing member 21 is attached to the trough portion 56 of the bellows member 13 by fastening the fastening member to the fastening holes 35 of the two coupling plates 33 that are overlapped. Thereby, when the bellows member 13 is compressed and deformed, the crest portions 55 on both sides of the trough portion 56 abut on the outer peripheral surface (regulating surface) of the reinforcing ring 31 of the strengthening member 21.

  Here, the reinforcing ring 31 and the bellows member 13 of the strengthening member 21 attached as described above have the positional relationship shown in FIG. FIG. 4 is an explanatory diagram showing a positional relationship between the reinforcing ring and the bellows member. 4, the center of the circular cross section of the reinforcing ring 31 is P1, the apex in the radial direction of the crest 55 of the bellows member 13 is P2, and the center of curvature of the radius of curvature of the crest 55 of the bellows member 13 is P3. And In this case, the center P <b> 1 of the reinforcing ring 31 is located on the inner side in the radial direction in the radial direction of the reinforcing ring 31 than the line connecting the apexes P <b> 2 of the peak portions 55 on both sides of the valley portion 56. The center P <b> 1 of the reinforcing ring 31 is located on the outer side in the radial direction in the radial direction of the reinforcing ring 31 than the line connecting the curvature centers P <b> 3 of the peak portions 55 on both sides of the valley portion 56. Thus, by forming the strengthening member 21 so as to have the above-described positional relationship, the reinforcing ring 31 can be suitably brought into contact with the mountain portions 55 on both sides of the valley portion 56.

  Next, the end spacer 41 will be described with reference to FIG. As described above, the end spacer 41 is provided at both ends of the bellows member 13. The end spacer 41 includes a plurality (two in the present embodiment) of divided end spacer pieces 43 divided into a plurality in the circumferential direction.

  The two divided end spacer pieces 43 are arranged side by side along the outer periphery of the bellows member 13 and are integrated by being connected by a connecting portion 46 described later. As shown in FIG. 5, the split end spacer piece 43 is formed in a semicircular arc shape.

  The split end spacer piece 43 has a tapered surface 45 on the surface of the bellows member 13 on the peak portion 55 side. The tapered surface is a surface that widens toward the peak portion 55 side of the bellows member 13, and the peak portion 55 of the bellows member 13 contacts the tapered surface 45 when the bellows member 13 is compressed and deformed.

  Connecting portions 46 are respectively provided at both ends of the split end spacer pieces 43 having a semicircular arc shape, and the connecting portions 46 connect the split end spacer pieces 43 adjacent in the circumferential direction. The connecting portion 46 is formed by arranging two split end spacer pieces 43 side by side along the circumferential direction, so that a pair of connecting portions 46 of one split end spacer piece 43 and the other split end spacer piece 43 are arranged. The pair of connecting portions 46 are overlapped with each other.

  The connecting portion 46 is formed with a fastening hole 48 for fastening two overlapping connecting portions 46. Fastening members such as bolts and nuts (not shown) are fastened to the fastening holes 48. For this reason, the two split end portion spacer pieces 43 are connected by a fastening member in which two overlapping connecting portions 46 are fastened to the fastening holes 48.

  When the end spacer 41 configured as described above is attached between the bellows member 13 and the end plate 11 and between the bellows member 13 and the attachment member 12, first, two divided end spacer pieces 43 are provided. Are arranged in the circumferential direction along the outer periphery of the bellows member 13. When two split end spacer pieces 43 are provided along the outer periphery of the bellows member 13, a pair of connecting portions 46 of one split end spacer piece 43 and a pair of connecting portions of the other split end spacer piece 43. 46 are superimposed on each other. The end spacer 41 is attached to the bellows member 13 by fastening the fastening member to the fastening holes 48 of the two connecting portions 46 that are overlapped. Thereby, when the bellows member 13 is compressed and deformed, the crest portions 55 on both ends of the bellows member 13 abut on the tapered surfaces (regulating surfaces) 45 of the end spacers 41.

  As described above, according to this embodiment, when the bellows member 13 is compressed and deformed in the compression direction (axial direction), the outer peripheral surface of the reinforcing ring 31 of the strengthening member 21 and the tapered surface 45 of the end spacer 41 are used. The inclination of the peak portion 55 with respect to the compression direction of the bellows member 13 can be restricted. For this reason, since buckling of the bellows member 13 can be suppressed, an increase in load due to buckling can be suppressed.

  Further, according to the present embodiment, the reinforcing ring 31 is disposed in the valley portion 56 of the bellows member 13 via the spacer 32, so that the mountain portions 55 on both sides in the axial direction are applied to the outer peripheral surface of the reinforcing ring 31. Can be touched. At this time, the reinforcing ring 31 can be suitably positioned at a predetermined position by bringing the spacer 32 into contact with the valley portion 56 of the bellows member 13. For this reason, when the bellows member 13 is compressed and deformed, the strengthening member 21 can maintain the interval between the peak portions 55 adjacent in the axial direction, and thus can suppress the inclination of the peak portion 55 with respect to the compression direction. Therefore, buckling of the bellows member 13 can be suppressed.

  In addition, according to the present embodiment, the reinforcing ring 31 can be divided into a plurality of divided reinforcing ring pieces 34. Therefore, the plurality of divided reinforcing ring pieces 34 are arranged in the circumferential direction on the outer periphery of the existing bellows member 13, The reinforcing ring 31 can be attached to the existing bellows member 13 by being connected by the connecting plate 33.

  Further, according to the present embodiment, the coupling plates 33 of the two divided reinforcing ring pieces 34 are superposed on each other, whereby the respective fastening holes 35 of the two coupling plates 33 can be superposed. By fastening the fastening member, the two divided reinforcing ring pieces 34 can be connected. At this time, since the fastening hole 35 is formed in an oval shape, the connecting position of the two divided reinforcing ring pieces 34 can be adjusted, so that the position of the reinforcing ring 31 relative to the bellows member 13 can be adjusted. .

  Further, according to the present embodiment, the end spacer 41 is arranged at the end of the bellows member 13 in the axial direction, so that the crest portions 55 on both ends of the bellows member 13 are formed on the tapered surface 45 of the end spacer 41. Can be brought into contact with each other. For this reason, at the time of compressive deformation of the bellows member 13, the end spacer 41 can restrict the inclination of the peak portion 55 on the both end sides of the bellows member 13 with respect to the compression direction, thereby suppressing buckling of the bellows member 13. be able to.

  Further, according to this embodiment, the end spacer 41 can be formed with the tapered surface 45 that widens toward the bellows member 13, so that the end spacer 41 is attached to the peak portions 55 on both ends of the bellows member 13. It can be made to contact suitably. For this reason, the inclination with respect to the compression direction of the peak part 55 of the both ends side of the bellows member 13 can be controlled suitably.

  Moreover, according to the present Example, since the buckling at the time of the compression deformation of the bellows member 13 can be suppressed, the service life of the bellows member 13 can be improved. For this reason, the sealing by the piping seal structure 10 can be suitably maintained.

  In the present embodiment, the case where the reinforcing member 21 and the end spacer 41 are attached to the existing bellows member 13 has been described. However, when the piping seal structure 10 is newly installed, the reinforcing member 21 and the end spacer 41 are provided. There is no need to form a divided structure, and there is no particular limitation.

  In the present embodiment, the cross-sectional shape of the reinforcing ring 31 is circular. However, the present invention is not limited to this, and may be a rectangular cross-section, for example. The reinforcing ring 31 is formed by bending a round bar, but may be formed by bending a tubular body. Furthermore, the spacer 32 is provided over the entire circumference on the inner peripheral side of the reinforcing ring 31, but may be provided on a part of the inner peripheral side of the reinforcing ring 31. For example, three rods are used as spacers. May be. In this case, the three rod bodies are projected from the inner peripheral side of the reinforcing ring 31 toward the valley portion 56 of the bellows member 13, and the three rod bodies are arranged in the circumferential direction of the inner periphery of the reinforcing ring 31. Provide at intervals.

DESCRIPTION OF SYMBOLS 1 Building 5 Wall body 6 Through-hole 7 Existing piping 10 Piping seal structure 11 End plate 12 Attachment member 13 Bellows member 21 Strengthening member 31 Reinforcement ring 32 Spacer 33 Connection plate 34 Split reinforcement ring piece 35 Fastening hole 41 End spacer 43 Division End spacer piece 45 Tapered surface 46 Connecting portion 48 Fastening hole 55 Mountain portion 56 Valley portion 57 Intermediate portion

Claims (8)

Reinforcing members that reinforce cylindrical bellows members that are alternately formed along the axial direction, peak portions protruding outward in the radial direction and valley portions protruding inward in the radial direction,
During the compression deformation of the bellows member, in contact with the ridges, have a regulating surface for regulating the inclination of the crests with respect to the compression direction,
Provided on the outer peripheral side of the trough between the crests adjacent in the axial direction of the bellows member, with a predetermined gap from the trough in the radial direction, and formed annularly along the outer periphery of the trough With a reinforcing ring,
A spacer that is provided in the gap between the reinforcing ring and the trough, protrudes from the reinforcing ring toward the trough, and positions the reinforcing ring with respect to the trough.
The reinforcing member is an outer peripheral surface of the reinforcing ring . The reinforcing ring has a plurality of divided reinforcing ring pieces that can be divided into a plurality in the circumferential direction,
The divided reinforcing provided at both end portions in the circumferential direction of the ring piece, the divided reinforcing ring piece and connectable coupling member adjacent to the circumferential direction, the reinforcing member according to claim 1, further comprising. The connecting member has a connecting plate provided on the outer peripheral side of the divided reinforcing ring piece and formed with a fastening hole
The reinforcing member according to claim 2 , wherein the fastening hole has a long oval shape along a circumferential direction. The reinforcing ring has a circular cross section cut by a surface orthogonal to the circumferential direction of the bellows member,
In the cross section, the center of the reinforcing ring, claim 1, characterized in that said with located outside the center of the radius of curvature of the crests, positioned inside the top of the radially outer side of the ridges 4. The reinforcing member according to any one of items 1 to 3 . An end member provided at an axial end of the bellows member;
The reinforcing member according to claim 1, wherein the restriction surface is a contact surface that contacts the peak portion of the bellows member that contacts the end member. The reinforcing member according to claim 5 , wherein the contact surface is a tapered surface that extends toward the bellows member in an axial direction of the bellows member. A seal structure for piping that seals between a wall of a building where a through-hole penetrating inside and outside is provided and a pipe inserted through the through-hole,
An end plate attached to the pipe;
An attachment member attached to the through hole;
A bellows member provided between the end plate and the mounting member;
Wherein attached to the bellows member, pipe seal structure characterized by comprising a reinforcing member, a according to any one of claims 1 to 6. A wall provided with a through-hole penetrating inside and outside;
Piping inserted through the through hole;
A building comprising: the pipe sealing structure according to claim 7 , which seals between the wall body and the pipe inserted through the through hole.

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