JP6266988B2 - Sealing device for through-wall piping - Google Patents

Description

  The present invention relates to a sealing device for blocking an axially opposed annular space between a through hole in a wall and a pipe inserted into the through hole in the axial direction.

  For example, in a nuclear power plant, a thermal power plant, a chemical plant facility, etc., it is necessary to take out the piping outside the building. In addition, when the electric equipment and the control device are installed in a large number of rooms, it is necessary to install a pipe through an electric cable or the like so as to straddle both the rooms. For this reason, the pipe is penetrated through the wall of the building.

  Appropriate sealing means must be provided between the pipe and the through hole in the wall (see, for example, Patent Document 1).

  By the way, when a high-temperature fluid (high-temperature water or steam) is circulated in the pipe, the pipe may expand and contract in the radial direction, and even if the fluid flowing in the pipe is at a low temperature, for example, The pipe may be displaced in the axial direction and the radial direction due to an earthquake or the like.

  For this reason, the means for sealing the space between the pipe and the through-hole of the wall by making the through-hole of the wall sufficiently larger than the pipe and in the axial direction and the radial direction of the pipe It is necessary to adopt a configuration that allows displacement (see, for example, Patent Document 2).

  For example, in Patent Document 2, an outer cladding tube is provided on the outer diameter side of a pipe, and a seal member and a guide mechanism are provided in an opposed annular space between the outer cladding tube and a through hole in the wall. The seal member has a ring shape that can be elastically deformed. Further, the guide mechanism is installed at four places (upper, lower, left, right) of the counter annular space. The upper and lower two guide mechanisms constrain the pipe in the horizontal direction, and the left and right two guide mechanisms prevent the pipe from moving up and down.

  Further, in Patent Document 2, the claims and the eleventh to twentieth rows in the right column on page 3 indicate that “the relative movement in the axial direction of the pipe with respect to the wall of the containment vessel is caused by the circumferential restraint metal and the lug. There is a description of “allow”.

JP-A-6-117545 Japanese Utility Model Publication No. 3-50480

  In Patent Document 1, relative movement in the axial direction and the radial direction of the pipe with respect to the wall cannot be allowed. Moreover, in the said patent document 2, although the relative movement of the axial direction of the said pipe with respect to the said wall is permitted, the displacement of the radial direction of the said pipe with respect to the said wall cannot be permitted.

  In view of such circumstances, the present invention provides a sealing device that axially blocks a radially opposed annular space between a through hole of a wall and a pipe inserted into the through hole. The purpose is to improve the sealing performance under high pressure load as much as possible after allowing displacement in the direction and radial direction.

The present invention is a sealing device for blocking an axially annular space between a through hole in a wall and a pipe inserted into the through hole in the axial direction, and is attached to the inner opening of the wall in the axial direction. An outer ring, an inner ring that is attached to an outer circumferential surface of the pipe and spaced apart from the outer ring and opposed in the radial direction so as to be fixed at least in the axial direction, an outer diameter side fixed to the outer ring, and an inner diameter side fixed to the inner ring And an annular plate-shaped elastic seal cover that closes a radially separated portion between the outer ring and the inner ring, and the inner ring is disposed so as to face the pipe in a non-contact manner. A seal ring is interposed between the other end and the pipe, and an adhesive is filled in an annular gap formed by the seal ring, the inner ring, and the pipe. Outside An elastic sheet wound around a region adjacent to the inner ring in the axial direction on the surface, and the elastic sheet is sheathed on the outer diameter side of the elastic sheet so as to be elastically compressed radially inward and one end in the axial direction of the inner ring A ring-shaped piece for restricting the amount of axial expansion caused by the elastic compression of the elastic sheet. are al provided, is characterized in that.

  In this configuration, since the outer ring attached to the wall and the inner ring attached to the pipe are connected by the annular plate-shaped elastic seal cover, when the pipe is displaced in the axial direction and the radial direction, the displacement Following this, the elastic seal cover is elastically deformed to allow movement of the pipe.

  In addition, since the two seal rings are interposed between the inner ring and the pipe, an adhesive is filled in an annular gap formed by the two seal rings, the inner ring, and the pipe. Even when a radial displacement or slight vibration of the pipe occurs, the inner ring and the pipe do not collide with each other due to the two seal rings and the adhesive. Thereby, it becomes possible to prevent damage to the inner ring and the piping.

  Furthermore, when the pressure (load) from the axial direction is applied to the annular plate-shaped elastic seal cover, the elastic seal cover only needs to expand in the axial direction. Here, if a cylindrical elastic seal cover (not shown) is used, when the pressure from the axial direction is applied as described above, it swells outward in the radial direction and accordingly, in the circumferential direction. Since tensile force acts, it is necessary to set the strength of the cylindrical elastic seal cover as high as possible. Therefore, it can be said that the annular plate-shaped elastic seal cover of the present invention is superior in the pressure resistance in the axial direction as compared with the cylindrical elastic seal cover. Therefore, in the sealing device of the present invention, the sealing performance at the time of the action of the high pressure load is improved as much as possible.

  Furthermore, since the inner ring and the pipe are bonded with an adhesive, the inner ring is integrally displaced when the pipe is displaced in the axial direction. As a result, the elastic deformation amount of the elastic seal cover is restricted, and the elastic seal cover can be protected.

  Preferably, the elastic seal cover in the sealing device may be configured such that an annular curved portion that curves so as to bulge in one axial direction is provided in the middle of the radial direction.

  In this configuration, since the annular curved portion is provided such that the middle of the elastic seal cover in the radial direction swells in one axial direction, the amount of elastic deformation in the axial direction and the radial direction of the elastic seal cover becomes relatively large. Thereby, for example, the displacement allowance in the axial direction and the radial direction of the pipe is further increased.

  Preferably, the engaging band in the sealing device is structured to be divided in a circumferential direction, and the radially outward fastening adjustment is opposed to the both ends of each divided body in a non-contact manner in the circumferential direction. A piece is provided, the fastening adjustment pieces are fastened by bolts and nuts, and the elastic compression force of the elastic sheet is adjusted by the fastening force.

  Here, the structure which divided | segmented the said engagement band in the circumferential direction is specified. In this case, it is possible to adjust the strength of the elastic compression force of the elastic sheet disposed on the inner diameter side of the engagement band by the circumferential tightening force when the engagement band segments are joined to each other. become.

  Preferably, the outer ring and the inner ring in the sealing device may have a two-piece structure divided into a semi-cylindrical shape, and both ends of the both divided bodies may be flange-coupled. Here, the configurations of the outer ring and the inner ring are specified, and this specification facilitates installation.

  Preferably, a sleeve is attached to the through hole of the wall in the sealing device, and the outer ring is attached to the axial end of the sleeve side by side in the axial direction. Here, the attachment form of the sealing device is specified when the sleeve is attached to the wall.

  The present invention relates to a sealing device that axially blocks an annular space opposite to a radial direction between a through-hole in a wall and a pipe inserted into the through-hole, so that axial and radial displacements of the pipe with respect to the wall are reduced. It is possible to improve the sealing performance at the time of high pressure load as much as possible.

1 is a side view showing a cross section of an upper half in one embodiment of a sealing device for a wall through pipe according to the present invention. It is a perspective view which shows the state which looked at the sealing apparatus of FIG. 1 from the axial direction one side (outside of a wall). It is a perspective view which shows the state which looked at the sealing apparatus of FIG. 2 from the other side (inner side of a wall). It is the end elevation which looked at the sealing device of Drawing 1 from the outside of a wall. FIG. 3 is a perspective view in which a part is broken in FIG. 2. It is a perspective view which decomposes | disassembles and shows the sealing apparatus of FIG. It is a perspective view which shows the state which looked at the inner ring | wheel of FIG. 1 from the axial direction one side (outside of a wall). It is a perspective view which shows the state which looked at the inner ring | wheel of FIG. 7 from the other side (inside of a wall). It is a perspective view which shows the state which looked at the elastic seal cover of FIG. 1 from the axial direction one side (outside of a wall). It is a perspective view which shows the state which looked at the elastic seal cover of FIG. 9 from the other side (inside of the wall). It is a side view which shows a mode when piping is displaced to the axial direction in the sealing device of FIG. It is a side view which shows a mode when piping is displaced to radial direction in the sealing device of FIG. It is a figure for demonstrating the assembly | attachment procedure of the sealing device of FIG. It is a figure corresponding to Drawing 1 in other embodiments of a sealing device of wall penetration piping concerning the present invention. It is a figure corresponding to Drawing 1 in other embodiments of a sealing device of wall penetration piping concerning the present invention. FIG. 16 is a perspective view of the inner ring in FIG. 15. FIG. 16 is an end view showing a fastening band in the sealing device of FIG. 15. It is a perspective view which shows the state which isolate | separated a part of engagement band of FIG.

  BEST MODE FOR CARRYING OUT THE INVENTION Best modes for carrying out the present invention will be described in detail below with reference to the accompanying drawings.

  1 to 13 show an embodiment of the present invention. As shown in FIG. 1, the piping 2 is installed so that the wall 1 of a building may be straddled. A through-hole 3 having a circular cross section is provided in the wall 1 of the building, and a sleeve 4 is fitted and mounted in the through-hole 3. The sleeve 4 is a cylindrical steel pipe or the like. The pipe 2 is inserted into the sleeve 4 in a non-contact manner.

  A sealing device 5 is installed between the sleeve 4 and the pipe 2 penetrating the wall 1. In FIG. 1, the left portion of the wall 1 is, for example, the inside of the building, and the right portion of the wall 1 is the outside of the building. Accordingly, in the pipe 2 and the sleeve 4, the axial end facing the inside of the building is referred to as “axial inner end side”, and the axial end facing the outside of the building is “axial outer end side”. I will say.

  Then, in order to cut off the annular space between the radial facings of the pipe 2 and the sleeve 4 in the axial direction, a sealing device 5 is provided between the axial inner end side of the pipe 2 and the axial inner end side of the sleeve 4. Is provided.

  In this embodiment, the example which installs with the form which arrange | positions the sealing apparatus 5 on the outer side of a building is given. The seal device 5 includes an eccentricity adjusting plate 6, an outer ring 7, an inner ring 8, an elastic seal cover 9, and the like.

  In this embodiment, regarding each component (eccentricity adjusting plate 6, outer ring 7, inner ring 8, elastic seal cover 9) of the seal device 5, the axial end facing the outside of the building is referred to as “axial outer end”. The axial end facing the inside of the building is referred to as the “inner end in the axial direction”.

  The eccentric adjustment plate 6 is used as a relay member when the outer ring 7 is connected to the sleeve 4. When the pipe 2 is eccentric with respect to the sleeve 4, the outer ring 7 is concentrically arranged on the pipe 2. Used to do. The eccentric adjustment plate 6 is fixed to the sleeve 4 by, for example, welding, and the outer ring 7 is fixed to the eccentric adjustment plate 6 by, for example, welding.

  The outer ring 7 is a structure in which the first and second annular plate portions 72 and 73 are integrally provided by welding or the like at the axial outer end and the axial inner end of the cylindrical portion 71. The first annular plate 72 is connected to the eccentric adjustment plate 6 in a palmed state.

  The inner ring 8 is a structure in which an annular plate portion 82 that protrudes radially outward in the axial middle of the cylindrical portion 81 is integrally provided by welding or the like. The annular plate portion 82 is configured such that the attachment strength to the cylindrical portion 81 is increased by the reinforcing rib 83 (see FIGS. 3 and 8).

  And the inner ring | wheel 8 is attached to the area | region which is spaced apart from the outer ring | wheel 7 in the outer peripheral surface of the piping 2, and opposes it in a radial direction so that it may not move at least to an axial direction.

  Specifically, the inner ring 8 is disposed to face the pipe 2 in a state where a gap is created, and the gap is filled with, for example, a resin adhesive 11. Circumferential grooves 81a and 81a are provided on the inner peripheral surface of the inner ring 8 on the outer end side and the inner end side in the axial direction, and a seal ring 10 such as an O-ring is fitted in the peripheral grooves 81a and 81a. It has become so. The seal ring 10 is pressed against the outer peripheral surface of the pipe 2 in an elastically compressed state, whereby the gap between the inner ring 8 and the pipe 2 is sealed from the outside.

  The elastic seal cover 9 is formed in an annular plate shape, and is installed so as to connect the outer ring 7 and the inner ring 8 so as to be capable of relative displacement in the axial direction and the radial direction.

  The elastic seal cover 9 has an annular plate shape, and is provided with an annular curved portion 91 that swells in one axial direction in the radial direction. The annular curved portion 91 has, for example, an upper half cross section of “Ω” shape or semicircular shape.

  The elastic seal cover 9 includes, for example, a reinforcing cloth knitted with appropriate reinforcing fibers and an elastic body (silicon rubber, fluorine rubber, synthetic rubber, chloroprene rubber, ethylene propylene rubber, etc.) from inside and outside in the axial direction. The allowable expansion / contraction amount and the allowable deflection amount can be appropriately set depending on, for example, the material, the internal structure, the radius of curvature of the annular curved portion 91, and the like.

  The outer diameter side flat region 92 of the elastic seal cover 9 is fixed to the outer ring 7, and the inner diameter side flat region 93 of the elastic seal cover 9 is fixed to the inner ring 8, so that a radially separated portion between the outer ring 7 and the inner ring 8 is provided. It is supposed to close. Further, as shown in FIG. 10, an annular convex portion 94 is provided in the outer diameter side flat region 92 and the inner diameter side flat region 93 of the elastic seal cover 9. The ring-shaped convex portion 94 is not displayed in FIG. 1 because it is crushed by being elastically compressed in the attached state of the elastic seal cover 9.

  Specifically, the attachment form of the elastic seal cover 9 will be described. The outer diameter side flat region 92 of the elastic seal cover 9 is palm-engaged with the second annular plate portion 73 on the outer end side of the outer ring 7 and connected by fastening members (stud bolt 21, nut 22 and washer 23), and Then, the inner diameter side flat region 93 of the elastic seal cover 9 is palm-engaged with the annular plate portion 82 of the inner ring 8 and connected by a fastening member (stud bolt 21, nut 22 and washer 23). The stud bolt 21 is screwed and fixed to the second annular plate portion 73 of the outer ring 7 and the annular plate portion 82 of the inner ring 8.

  By the way, an outer diameter side retainer plate 12 is interposed in the mating portion of the elastic seal cover 9 and the outer ring 7, and the inner diameter side of the mating portion of the elastic seal cover 9 and the inner ring 8 is interposed. The retainer plate 13 is interposed.

  The eccentric adjustment plate 6, the outer ring 7, the inner ring 8, and the two retainer plates 12 and 13 are made of, for example, a metal material (for example, carbon steel, stainless steel, etc.).

  The eccentric adjustment plate 6 and the outer ring 7 have a two-piece structure that is divided into two in the circumferential direction, and both ends in the arc direction of the respective divided bodies are joined together by welding or the like, for example.

  The inner ring 8 has a three-piece structure that is divided into three in the circumferential direction. The inner ring 8 is a fastening member (bolt) by joining the connecting pieces 84 and 85 formed at both ends in the axial direction at both ends in the arc direction of each divided body. 31 and a nut 32). A triangular reinforcing piece 86 is provided on the coupling piece 85 on the outer end side in the axial direction.

  The elastic seal cover 9 is separated at one place on the circumference, and although not shown, an appropriate rubber system is provided in such a state that both ends of the separation part are overlapped and a reinforced rubber sheet is covered with the overlapping part. They are joined together by bonding with an adhesive.

  The outer diameter side retainer plate 12 and the inner diameter side retainer plate 13 have a structure divided into three in the circumferential direction, and fastening members (stud bolts 21, nuts for attaching the elastic seal cover 9 to the outer ring 7 and the inner ring 8). 22 and a washer 23) are interposed in the palm of the elastic seal cover 9, outer ring 7 and inner ring 8.

  In addition, the seal ring 10 is also formed into a ring shape by using, for example, a long member as a base material and connecting both ends in the longitudinal direction.

  In the case of the sealing device 5 having such a configuration, it is advantageous for improving the sealing performance to dispose the coupling portions of the outer ring 7, the inner ring 8 and the elastic seal cover 9 so as to be shifted by a predetermined angle in the circumferential direction. Become.

  Here, as shown in FIG. 11, when the pipe 2 is displaced in the axial direction, the annular curved portion 91 of the elastic seal cover 9 is elastically deformed following the displacement to absorb the movement of the pipe 2. It has become. As shown in FIG. 12, when the pipe 2 is displaced in the radial direction, the elastic seal cover 9 is elastically deformed following the displacement to allow the movement of the pipe 2.

  Next, the assembly procedure of the sealing device 5 described above will be described with reference to FIG.

  First, the eccentric adjustment plate 6 is attached to the sleeve 4 by, for example, welding. The first annular plate portion 72 of the outer ring 7 is palm-engaged with the eccentric adjustment plate 6 and attached by, for example, welding.

  Next, two seal rings 10 and 10 are externally mounted on a region where the inner ring 8 is to be attached on the outer peripheral surface of the pipe 2, and the three-piece structure inner ring 8 is attached to the outer diameter side thereof. At that time, the adhesive 11 is applied to both the inner peripheral surface of each of the three divided members constituting the inner ring 8 and the region where the inner ring 8 is to be attached on the outer peripheral surface of the pipe 2, and each divided member is applied. The two circumferential rings 81a and 81a are aligned so that the two seal rings 10 and 10 are fitted.

  Thereafter, the elastic seal cover 9 is attached to the outer ring 7 and the inner ring 8. At this time, the insertion hole (reference numeral omitted) of the outer diameter side flat region 92 of the elastic seal cover 9 is fitted into the stud bolt 21 on the outer ring 7 side, and the inner diameter side flat of the elastic seal cover 9 is inserted into the stud bolt 21 on the inner ring 8 side. After inserting the insertion holes (reference numerals omitted) in the region 93, the retainer plates 12 and 13 are respectively attached to the both stud bolts 21, and the nuts 22 are respectively attached to the both stud bolts 21 via washers 23 from above. Screw together.

  Finally, although not shown, a caulking material is applied between the axial ends of the inner ring 8 and the outer peripheral surface of the pipe 2.

  As described above, the sealing device 5 according to the embodiment to which the present invention is applied has an annular plate shape of the outer ring 7 attached to the sleeve 4 attached to the through hole 3 of the wall 1 and the inner ring 8 attached to the pipe 2. By making the structure connected by the elastic seal cover 9, most of the annular space between the sleeve 4 and the pipe 2 facing each other in the radial direction is closed in the axial direction. The elastic seal cover 9 is elastically deformed when displaced, thereby allowing the pipe 2 to move.

  Further, after two seal rings 10 are interposed between the inner ring 8 and the pipe 2, the adhesive 11 is filled in an annular gap formed by the two seal rings 10, the inner ring 8 and the pipe 2. Therefore, even when radial displacement or slight vibration of the pipe 2 occurs, the inner ring 8 and the pipe 2 do not collide with each other due to the two seal rings 10 and the adhesive 11. Thereby, damage to the inner ring 8 and the pipe 2 can be prevented.

  Furthermore, when the pressure (load) from the axial direction is applied to the annular plate-shaped elastic seal cover 9, the elastic seal cover 9 only needs to expand in the axial direction. Here, although not shown in the figure, when a cylindrical elastic seal cover is used, when pressure from the axial direction acts as described above, it will swell outward in the radial direction. Since the tensile force in the circumferential direction acts, it is necessary to set the strength of the cylindrical elastic seal cover as high as possible. For this reason, it can be said that the annular plate-shaped elastic seal cover 9 employed in this embodiment is superior in pressure resistance in the axial direction as compared with the cylindrical elastic seal cover. Therefore, in the sealing device 5 in this embodiment, the sealing performance at the time of the action of the high pressure load is improved as much as possible.

  Further, since the inner ring 8 and the pipe 2 are bonded with the adhesive 11, the inner ring 8 is displaced integrally with the pipe 2 when the pipe 2 is displaced in the axial direction. As a result, the elastic deformation amount of the elastic seal cover 9 is restricted, and the elastic seal cover 9 can be protected.

  Further, when the adhesive 11 is filled in the annular gap, the adhesive 11 is blocked by the two seal rings 10 so as not to flow out in the axial direction, so that the construction work can be performed relatively easily. Become.

  The annular plate-shaped elastic seal cover 9 has a high-strength structure in which a reinforcing cloth is sandwiched between elastic materials such as rubber from the axial direction. For example, the manufacturing is simpler than the case of the cylindrical elastic seal cover. As a result, an increase in manufacturing cost can be suppressed.

  By the way, when steam, high-temperature water or the like is circulated in the pipe 2, it is preferable to form the elastic seal cover 9 and the seal ring 10 with a material (silicon rubber, fluorine rubber, etc.) having particularly excellent heat resistance.

  In addition, this invention is not limited only to the said embodiment, It can change suitably in the range equivalent to the claim and the said range.

  (1) In the said embodiment, although the case where the sealing device 5 is arrange | positioned on the outer side of the wall 1 of a building is mentioned as an example, this invention is not limited only to this, For example, the sealing device 5 is attached to a building. It is also possible to arrange it inside the wall 1.

  (2) In the above embodiment, an example is given in which the outer ring 7 and the inner ring 8 of the sealing device 5 are divided in the circumferential direction. However, the present invention is not limited to this example. Can be arbitrary, and can be a one-piece structure.

  (3) In the above embodiment, an example is given in which the sleeve 4 attached to the through hole 3 of the wall 1 and the cylindrical portion 71 of the outer ring 7 of the seal device 5 have substantially the same outer diameter, but the present invention is only this. It is not limited to. For example, when the outer diameter of the sleeve 4 and the outer diameter of the cylindrical portion 71 of the outer ring 7 are different from each other, it is possible to appropriately adjust the outer size of the eccentric adjustment plate 6 and the first annular plate portion 72 of the outer ring 7. be able to.

  (4) In the above embodiment, the present invention also includes a case where one or both of the eccentricity adjustment plate 6 and the sleeve 4 are eliminated.

  Here, for example, when the eccentric adjustment plate 6 and the sleeve 4 are eliminated, the first annular plate portion 72 of the outer ring 7 can be attached to the wall 1 as shown in FIG. For the attachment, for example, it is conceivable to use an anchor bolt 15, a nut 16, a washer 17, and the like.

  (5) In the above embodiment, it is possible to add a stopper (see, for example, reference numeral 40 in FIG. 15) for restricting displacement in the axial direction and circumferential direction with respect to the pipe 2 to the sealing device 5.

  As shown in FIGS. 15 to 18, the stopper 40 includes an elastic sheet 41 and an engaging band 42.

  The elastic sheet 41 is wound around a region adjacent to the inner ring 8 in the axial direction on the outer peripheral surface of the pipe 2. The elastic sheet 41 is made of, for example, a rubber material.

  The engaging band 42 is wound around the outer diameter side of the elastic sheet 41 and can elastically compress the elastic sheet 41 inward in the radial direction. The engaging band 42 is made of, for example, a metal material (for example, carbon steel, stainless steel, etc.).

  Radially outward protruding pieces 43 are provided at several circumferential positions on the inner end side in the axial direction of the engaging band 42, and each protruding piece 43 has a diameter provided at the outer end in the axial direction of the inner ring 8. It is connected to the projecting piece 87 facing outward by a fastening member (bolt 51).

  The radially outward projecting piece 43 is provided with a through hole (not shown) through which the bolt 51 is inserted, and the projecting piece 87 of the inner ring 8 is a female screw hole into which the bolt 51 is screwed. (Reference numeral omitted) is provided.

  At both ends in the axial direction of the engaging band 42, radially inward ring-shaped pieces 44 and 45 are provided for projecting radially inward and for restricting the amount of axial expansion associated with the elastic compression of the elastic sheet 41. Yes.

  The engaging band 42 in the illustrated example has a four-piece structure that is divided into four in the circumferential direction. At both ends of each divided body, a radially outward fastening adjustment piece 46 is provided, and each of the opposed fastening adjustment pieces 46 is opposed to each other in a circumferential direction so as to be connected to a fastening member ( The bolt 61 and the nut 62) are used for fastening. By this fastening force, the elastic compression force of the elastic sheet 41 is adjusted in strength, and the tightening force of the elastic sheet 41 with respect to the pipe 2 is adjusted.

  In the case of this embodiment, it is possible to further strengthen the attachment form of the inner ring 8 to the pipe 2 as compared with the above embodiment.

  The present invention can be suitably used for a sealing device 5 that blocks an annular space in a radial direction between the through hole 3 of the wall 1 and the pipe 2 inserted into the through hole 3 in the axial direction.

1 wall
2 Piping
3 Wall through-hole
4 Sleeve
5 Sealing device
6 Eccentricity adjustment plate
7 outer ring 71 cylindrical part of outer ring 72 first annular plate part of outer ring 73 second annular plate part of outer ring
DESCRIPTION OF SYMBOLS 8 Inner ring 81 Cylindrical part of inner ring 81a Circumferential groove 82 Annular plate part 83 Reinforcement rib 84 Coupling piece of axial inner end side 85 Coupling piece of axial outer end side
DESCRIPTION OF SYMBOLS 9 Elastic seal cover 91 Annular curved part of elastic seal cover 92 Outer diameter side flat area of elastic seal cover 93 Inner diameter side flat area of elastic seal cover 10 Seal ring 11 Adhesive 21 Stud bolt 22 Nut 23 Washer 31 Bolt 32 Nut

Claims (5)

A sealing device that cuts off a radially opposed annular space between a through hole of a wall and a pipe inserted into the through hole in the axial direction,
An outer ring attached axially next to the inner opening of the wall;
An inner ring attached to the outer peripheral surface of the pipe so as to be stationary at least in an axial direction in a region opposed to the outer ring in the radial direction;
An annular plate-shaped elastic seal cover that has an outer diameter side fixed to the outer ring and an inner diameter side fixed to the inner ring, and closes a radially separated portion between the outer ring and the inner ring,
The inner ring is disposed so as to face the pipe in a non-contact manner, and a seal ring is interposed between the inner ring and one pipe in the axial direction at one end and the other end, respectively.
An adhesive is filled in an annular gap formed by both the seal rings, the inner ring and the pipe ,
An elastic sheet wound around a region adjacent to the inner ring in the axial direction on the outer peripheral surface of the pipe;
An engagement band that is externally mounted on the outer diameter side of the elastic sheet so as to elastically compress the elastic sheet inward in the radial direction and is attached to one axial end of the inner ring;
At both axial ends of the engaging wear bands, respectively projecting radially inwardly and annular piece for restricting the axial expansion amount due to the elastic compression of the elastic sheet is al provided, characterized in that Sealing device for through-wall piping. In the sealing device of wall penetration piping according to claim 1,
The elastic seal cover is provided with an annular curved portion that is curved so as to bulge in one axial direction in the middle of the radial direction. In the sealing device of the wall through pipe according to claim 1 or 2,
The anchoring band has a multi-piece structure divided into at least two in the circumferential direction,
At both ends of each of the divided bodies, there are provided radially outward fastening adjustment pieces that are opposed to each other in a circumferential direction, and the fastening adjustment pieces are fastened by bolts and nuts. elastic compressive force of the elastic sheet Ru is adjusted by the force, the sealing device of the through-wall pipes, characterized in that. In the sealing device of wall penetration piping given in any 1 paragraph of Claims 1-3 ,
The outer ring and the inner ring have a structure divided in a circumferential direction, and both ends of the both divided bodies are flange-coupled , and the sealing device for a through-wall pipe, In the sealing device of wall penetration piping of any one of Claim 1 to 4,
The through hole of the wall, the sleeve is seated, the outer ring in the axial end of the sleeve mounting et al are side by side axially, sealing device of through-wall pipes, characterized in that.

Images