JP2019143682A - Case device and mounting method of case device - Google Patents

Abstract

To provide a case device easy in fastening management, and capable of coping with various outer diameters by selecting tube kinds and the like, and to provide a mounting method of the case device.SOLUTION: A case device includes an annular case body having a split portion 10 on at least one place in a circumferential direction and surrounding an outer peripheral face of a water service pipe in a sealed state through a seal material, and a fastener for joining a plurality of split pieces configuring the case body by fastening the split portion 10. Joining faces 14 disposed on circumferential end portions of the split pieces have projections 21 and projections 22 having a projection amount smaller than that of the projections 21. The projections 21 are constituted to define a clearance gap G1 to the split portion 10 when the split portion 10 is fastened. The projections 22 are constituted to define a clearance gap smaller than the clearance gap G1 to the split portion 10 when the projections 21 are removed and the split portion 10 is fastened.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a casing device mounted on a fluid pipe and a mounting method of the casing device.

  Conventionally, when a fluid leaks at a joint portion of a fluid pipe such as a water pipe, repair may be performed using a casing device. The housing device includes an annular case body having a divided structure and a fastener for fastening the divided portion of the case body. When the case body surrounds the outer peripheral surface of the fluid pipe in a sealed state via the sealing material, the leaked fluid is retained in the internal space, and leakage of the fluid to the outside can be prevented. Such a casing device is described in Patent Document 1, for example. Another example of the casing device is a split T-shaped tube used in the continuous water construction method. Such a casing device is described in Patent Documents 2 and 3, for example.

  An operator who attaches the casing device to the fluid pipe fastens the divided portion of the case body by operating the fastener, and joins the plurality of divided pieces constituting the case body. At that time, tightening management can be performed by visually recognizing the size of the gap between the divided portions or based on the torque of the fastener. However, as shown in FIGS. 10A and 10B, in the configuration in which the gap G8 of the divided portion 80 is defined according to the compression of the sealing material 81, the size of the gap G8 is likely to vary, and the construction Moreover, the tightening management was complicated.

  On the other hand, as described in FIG. 5 of Patent Document 3, it is conceivable to form protrusions (spacers) on the joint surfaces of the divided portions. According to this, since the gap between the divided portions is defined according to the protrusion amount (height) of the protrusion, tightening management becomes easy. However, such a casing device can be used for a fluid pipe having a specific outer diameter, and cannot be used for a fluid pipe having a different outer diameter. Therefore, for example, a casing device used for a cast iron pipe (outer diameter: 220.0 mm) having a nominal diameter φ200 cannot cope with a steel pipe (outer diameter: 216.3 mm) having the same nominal diameter φ200 and is not economical.

JP 2002-276636 A JP 2006-194344 A JP 2006-214451 A

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a casing device that can be easily tightened and can cope with a case where the outer diameter varies depending on the tube type and the like, and a mounting method of the casing device. Is to provide.

  The casing device according to the present invention has a divided portion at least at one place in the circumferential direction, and an annular case body that surrounds the outer peripheral surface of the fluid pipe in a sealed state via a sealing material, and by tightening the divided portion A fastener that joins the plurality of divided pieces constituting the case body, and a joining surface provided at a circumferential end of the divided piece has a first protrusion and a first protrusion more than the first protrusion. A second protrusion having a small protruding amount is formed, and the first protrusion can define a first gap in the divided portion when the divided portion is tightened, and the second protrusion When the divided portion is tightened by removing the first protrusion, a second gap that is smaller than the first gap can be defined in the divided portion.

  According to such a configuration, when the divided portion is tightened, the first gap can be defined in the divided portion by the first protrusion formed on the joint surface. Further, by removing the first protrusion as necessary, when the divided portion is tightened, the second gap can be defined in the divided portion by the second protrusion formed on the joint surface. In any case, the tightening management of the divided part of the case body becomes easy. In addition, since the first gap and the second gap smaller than the first gap can be appropriately selected as the gap defined in the divided portion, it is possible to cope with a case where the outer diameter varies depending on the pipe type or the like.

  It is preferable that the first protrusion and / or the second protrusion is formed of a pair of protrusion pieces that are brought into contact with each other when the divided portion is tightened. Thereby, the sealing material interposed in the clearance gap between division parts can be compressed uniformly. In addition, since the protruding pieces are formed on the joint surfaces of the divided pieces, it may be convenient when the divided pieces are used for other purposes.

  It is preferable that a third protrusion is formed on the joint surface, and that the side surface of the third protrusion is in contact with the side surface of the second protrusion in the process of tightening the divided portion. According to such a configuration, an effect of suppressing the relative positional deviation between the divided pieces can be obtained.

  A fourth protrusion is formed on the joint surface, and a protruding portion that protrudes into the internal space of the case body when the divided portion is tightened is formed on the sealing material, and the fourth protrusion is What contacts the outer surface of the said sealing material in the formation location of the said protrusion part is preferable. According to such a configuration, it is useful for ensuring the amount of the protruding portion of the sealing material protruding into the internal space of the case body.

  Another casing device according to the present invention has a split portion at least at one place in the circumferential direction, and tightens the split portion with an annular case body that surrounds the outer peripheral surface of the fluid pipe in a sealed state via a sealing material. A fastener that joins a plurality of divided pieces constituting the case body, and a gap is formed when the divided portion is fastened to a joint surface provided at a circumferential end of the divided piece. Protrusions that can be defined in the split part and uneven parts that can suppress relative displacement between the split pieces are formed, and they face each other when the split part is tightened by removing the projection part. The joining surfaces are configured to be in close contact with each other.

  According to such a configuration, when the divided portion is tightened, the gap can be defined in the divided portion by the protruding portion formed on the joint surface. Further, by removing the protrusions as necessary, when the divided portions are tightened, the opposing joint surfaces are in close contact with each other. In any case, the tightening management of the divided part of the case body becomes easy. Moreover, the relative position shift of division | segmentation pieces can be suppressed with an uneven | corrugated | grooved part. In addition, since a state in which a gap is defined in the divided portion and a state in which there is no gap in the divided portion can be appropriately selected, it is possible to cope with a case where the outer diameter varies depending on the pipe type or the like.

  A mounting method for a casing device according to the present invention is a mounting method for a casing device that includes an annular case body having a split portion at at least one place in the circumferential direction and a fastener for fastening the split portion. A first projection and a second projection having a smaller projection amount than the first projection are formed on the joint surface provided at the circumferential end of the plurality of divided pieces constituting the case body. The first protrusion is capable of defining a first gap in the divided portion when the divided portion is tightened, and when surrounding the outer peripheral surface of the fluid pipe with the case body in a sealed state, The divided portion from which the first protrusion is removed is tightened to join the plurality of divided pieces, and a second gap smaller than the first gap is defined in the divided portion by the second protrusion. .

  When this casing device is used as it is, the first gap defines the first gap in the divided portion. However, in this method, the first protrusion is removed, so that the first gap is more than the first protrusion. The second gap is defined in the divided portion by the second protrusion having a small protrusion amount. In any case, the tightening management of the divided part of the case body becomes easy. In addition, since the first gap and the second gap smaller than the first gap can be appropriately selected as the gap defined in the divided portion, it is possible to cope with a case where the outer diameter varies depending on the pipe type or the like.

  It is preferable that when the divided portion is tightened, a pair of protruding pieces constituting the second protrusion are abutted with each other, thereby defining the second gap in the divided portion. Thereby, the sealing material interposed in the clearance gap between division parts can be compressed uniformly. In addition, since the protruding pieces are formed on the joint surfaces of the divided pieces, it may be convenient when the divided pieces are used for other purposes.

  In the process of tightening the divided portion, it is preferable that the side surface of the third protrusion formed on the joint surface is brought into contact with the side surface of the second protrusion. According to this method, the effect of suppressing the relative positional deviation between the divided pieces can be obtained.

  By tightening the divided portion, the protruding portion of the sealing material disposed inside the case body is protruded into the internal space of the case body, and the fourth protrusion formed on the joint surface is provided with the protruding portion. What is made to contact | abut to the outer side surface of the said sealing material in the formation location of is preferable. According to such a method, it is useful for securing the amount of the protruding portion of the sealing material protruding into the internal space of the case body.

  Another mounting method for a casing device according to the present invention is a mounting method for a casing device comprising an annular case body having a split portion at least at one place in the circumferential direction, and a fastener for fastening the split portion. In the joint surface provided at the circumferential end of the plurality of divided pieces constituting the case body, a protrusion that can define a gap in the divided portion when the divided portion is tightened; and An uneven portion capable of suppressing a relative positional shift between the divided pieces is formed, and when the outer peripheral surface of the fluid pipe is surrounded in a sealed state by the case body, the divided portion from which the protruding portion is removed is tightened. A plurality of the divided pieces are joined together, and the opposed joining surfaces are brought into close contact with each other while suppressing the relative positional deviation between the divided pieces by the concave and convex portions.

  When this casing device is used as it is, the gap is defined by the protruding portion in the divided portion. However, in this method, by removing the protruding portion, the opposing joining surfaces are in close contact with each other, and the gap is formed in the divided portion. It becomes a state without. In any case, the tightening management of the divided part of the case body becomes easy. Moreover, the relative position shift of division | segmentation pieces can be suppressed with an uneven | corrugated | grooved part. In addition, since a state in which a gap is defined in the divided portion and a state in which there is no gap in the divided portion can be appropriately selected, it is possible to cope with a case where the outer diameter varies depending on the pipe type or the like.

The half sectional view showing the case device concerning a 1st embodiment of the present invention. Half sectional view of the casing device of FIG. 1 viewed from the axial direction CC sectional view of FIG. Front view of split part Front view of the divided part with the first protrusion removed The front view which shows the housing | casing apparatus which concerns on 2nd Embodiment of this invention. The top view which shows the division | segmentation piece which comprises the housing | casing apparatus of FIG. The front view of the division part which concerns on other embodiment of this invention. The front view which shows the protrusion shape which concerns on other embodiment of this invention. Sectional drawing which shows the division part of the case body with which the conventional housing device is provided

  Embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
In 1st Embodiment, with reference to FIGS. 1-5, the housing | casing apparatus used for the leak repair of the joint part of the existing water pipe is illustrated. FIG. 1 is a half sectional view of a leakage repair device as a housing device. The upper half of FIG. 1 corresponds to the BB cross section of FIG. 2, but the water pipe is shown not in cross section but in appearance. FIG. 2 is a half sectional view of the leakage repair device as viewed from the axial direction. The upper half of FIG. 2 corresponds to the AA cross section of FIG. 3 is a cross-sectional view taken along the line CC of FIG. 4 and 5 are front views of the divided portions of the case body, respectively, and are drawn with the fasteners omitted for convenience of illustration.

  1 and 2, the leak repair device 1 (an example of a casing device) repairs a joint portion of an existing water pipe K (an example of a fluid pipe) so that fluid leaked from the joint portion does not leak to the outside. Being treated. In the present embodiment, an example is shown in which the water pipe K is a ductile cast iron pipe (outer diameter D1: 220.0 mm) having a nominal diameter of φ200. The leak repair device 1 has a split portion 10 at least at one place in the circumferential direction (three places in the present embodiment), and an annular case body 12 that surrounds the outer peripheral surface of the water pipe K in a sealed state via a sealing material 11. And a fastener 13 for fastening the divided portion 10.

  The case body 12 is externally fitted so as to form a circumferential gap on the outer periphery of the water pipe K, and a sealed space is formed therein. The case body 12 is made of, for example, ductile cast iron. The case body 12 is formed in a cylindrical shape, and the space between both ends and the water pipe K is sealed with a sealing material 11. The case body 12 is composed of a plurality of divided pieces 12a to 12c and has a tri-section structure in the present embodiment, but is not limited thereto. The fastener 13 joins the plurality of divided pieces 12 a to 12 c constituting the case body 12 by fastening the divided portion 10. The fastener 13 includes a bolt and a nut.

  The sealing material 11 is attached to each of the divided pieces 12a to 12c. The joining surface 14 is provided in the circumferential direction edge part of division piece 12a-12c, respectively. As shown in FIG. 3, the sealing material 11 is continuous between both end portions of the case body 12, and extends in the axial direction of the water pipe K along the joint surface 14. The joining surface 14 is provided in a flange shape, and the sealing material 11 is inserted into a groove 15 formed on the surface. In FIG. 3 (and FIG. 7 described later), the sealing material 11 is drawn in gray to facilitate distinction on the drawing.

  In each divided portion 10, the pair of joining surfaces 14 and 14 face each other, and the sealing materials 11 and 11 that are in close contact with each other as the fastener 13 is tightened seal the gap between the divided portions 10. Each of the split pieces 12a to 12c is an arc-shaped member as shown in FIG. 2, and a bolt hole for inserting a bolt of the fastener 13 into each of the joint surfaces 14 and 14 provided at both ends thereof. 14h is provided. The split piece 12c disposed above is provided with a pressure relief plug 16, but the basic structure of the split pieces 12a to 12c is the same except for this point.

  FIG. 4 shows a pair of joint surfaces 14, 14 facing each other in the divided portion 10, and corresponds to the direction of arrow D in FIG. 1. A protrusion 21 (corresponding to a first protrusion) and a protrusion 22 (corresponding to a second protrusion) having a smaller protrusion amount than the protrusion 21 are formed on the joint surface 14. The protrusion amount of the protrusions 21 and 22 is a height with respect to the joint surface 14. The protrusion 21 is provided integrally with the joint surface 14 and is formed of the material of the case body 12 (for example, a metal such as ductile cast iron). This also applies to the protrusion 22 and the protrusion 23 described later.

  In the present embodiment, the protrusion 21 is composed of a pair of protrusion pieces 21 a and 21 b that are brought into contact with each other when the dividing portion 10 is tightened. The protrusion amount of the protrusion 21 is expressed as the sum of the protrusion amount (height) of the pair of protrusion pieces 21a and 21b. The protrusion 22 is similarly composed of a pair of protrusion pieces 22a and 22b, and the protrusion amount of the protrusion 22 is the sum of the protrusion amount (height) of the pair of protrusion pieces 22a and 22b. Since the protrusion amount of the protrusion 22 is smaller than the protrusion amount of the protrusion 21, a gap is formed between the pair of protrusion pieces 22 a and 22 b as shown in FIG. 4 when the pair of protrusion pieces 21 a and 21 b are in contact with each other. .

  In a state in which the divided portion 10 is tightened, the protrusion 21 is interposed between the pair of joint surfaces 14 and 14 and corresponds to the protrusion amount of the protrusion 21 (that is, the total protrusion amount of the pair of protrusion pieces 21a and 21b). A gap G1 having a size (corresponding to the first gap) is defined. Thus, the protrusion 21 is configured such that the gap G1 can be defined in the divided portion 10 when the divided portion 10 is tightened. The protruding amount of the protrusion 21 is such that a gap that is desirable for the case body 12 to seal the outer peripheral surface of the water pipe K is defined in the divided portion 10, that is, a gap that is moderately large for closely contacting the sealing material 11. Is set to a predetermined size so that the dividing portion 10 is defined.

  An operator who attaches the leakage repair device 1 to the water pipe K only operates the fastener 13 until the gap G1 is defined by the protrusion 21 when the divided portion 10 is tightened to join the plurality of divided pieces 12a to 12c. It's okay. That is, the dividing portion 10 may be tightened until the protrusion 21 is sandwiched between the pair of joining surfaces 14 and 14 (the pair of protrusion pieces 21a and 21b are abutted with each other), which corresponds to the protrusion amount of the protrusion 21. A gap G1 is defined in the dividing portion 10. Since the gap between the divided portions 10 is not defined in accordance with the compression of the sealing material 11, tightening management is easy in construction without causing variations in the size of the gap.

  In the present embodiment, the protrusion 21 is composed of a pair of protrusion pieces 21 a and 21 b that are brought into contact with each other when the dividing portion 10 is tightened. Thereby, the sealing materials 11 and 11 interposed in the clearance gap between the division parts 10 can be compressed uniformly. In addition, since the protruding pieces are formed on the joint surfaces of the divided pieces, it may be convenient when the divided pieces are used for other purposes. For example, it becomes possible to divert as a case body of a leak repair apparatus using two division pieces 32a on the lower side of the split T-shaped tube as will be described later. However, the present invention is not limited to this, and one protrusion 21 having a protrusion amount corresponding to the total protrusion amount of the pair of protrusion pieces 21a and 21b may be formed on only one of the pair of joint surfaces 14 and 14. . This also applies to the protrusion 22.

  The protrusion amount of the protrusion 21 is set so as to define a desirable gap G1 for bringing the sealing material 11 into close contact with the outer peripheral surface of the water pipe K which is a ductile cast iron pipe (outer diameter D1: 220.0 mm) having a nominal diameter of φ200. ing. Therefore, even if the leak repair apparatus 1 is directly applied to a fluid pipe having an outer diameter different from that of the water pipe K, an appropriate sealed state cannot be obtained. For example, when mounted on a steel pipe (outer diameter: 216.3 mm) having a nominal diameter φ 200 different from the outer diameter of the water pipe K, the gap G1 defined by the protrusion 21 is larger than necessary, so that the sealing material 11 is sufficient. There is a risk that it will not be compressed. However, this leakage repair device 1 can also cope with the case where the outer diameter varies depending on the pipe type or the like.

  FIG. 5 shows a pair of bonding surfaces 14 and 14 that face each other in the divided portion 10 when the protrusion 21 is removed. Here, the removal of the protrusion 21 is not only when the protrusion 21 is completely removed as shown in FIG. 5 but also by reducing the protrusion amount of the protrusion 21 to be equal to or less than the protrusion amount of the protrusion 22. In addition, the case where the protrusion 21 does not correspond to the “first protrusion” is also included. The protrusion 21 can be removed, for example, by cutting using a disk grinder. This operation may be performed at the construction site, but can also be performed in advance before the apparatus is transported to the construction site.

  In FIG. 5, since the protrusion 21 is removed, the pair of protrusion pieces 22a and 22b constituting the protrusion 22 are abutted with each other. In a state in which the divided portion 10 is tightened, the protrusion 22 is interposed between the pair of joint surfaces 14 and 14 and corresponds to the protrusion amount of the protrusion 22 (that is, the total protrusion amount of the pair of protrusion pieces 22a and 22b). A gap G2 having a size (corresponding to the second gap) is defined. Thus, the protrusion 22 is configured to be able to define a gap G2 smaller than the gap G1 in the divided part 10 when the protrusion 21 is removed and the divided part 10 is tightened. The protruding amount of the protrusion 22 is a predetermined dimension such that a desired gap is defined in the divided portion 10 for sealing the outer peripheral surface of a fluid pipe (for example, a steel pipe having a nominal diameter of φ200) having an outer diameter smaller than that of the water pipe K. Is set to

  The operation when the plurality of pieces 12a to 12c are joined by operating the fastener 13 is the same as when the projection 21 is not removed, but the projection 22 is sandwiched between the pair of joining surfaces 14 and 14. (A pair of protrusion pieces 22a and 22b are abutted with each other), and a gap G2 corresponding to the protrusion amount of the protrusion 22 is defined in the divided portion 10. Also in this case, since the gap between the divided portions 10 is not defined according to the compression of the sealing material 11, tightening management is easy in construction.

  Thus, since the leak repair apparatus 1 has the option to change the gap G1 prescribed | regulated to the division | segmentation part 10 by selecting whether the protrusion 21 is removed, it has a different outer diameter. Compatible with water pipes. In the present embodiment, when mounting on a ductile cast iron pipe having a nominal diameter of φ200, it is used with the projection 21 left as shown in FIG. 4, and when mounting on a steel pipe having a nominal diameter of φ200, as shown in FIG. In any case, the tightening management of the divided portion 10 is easy. Moreover, even if the outer diameter varies depending on the pipe type or the like, the same leakage repair device 1 can cope with it, which is economical.

  In the present embodiment, a protrusion 23 (corresponding to a third protrusion) is formed on the bonding surface 14. The side surface of the protrusion 23 is configured to come into contact with the side surface of the protrusion 22 in the process of tightening the dividing portion 10 as shown in FIG. According to such a configuration, an effect of suppressing the relative positional deviation between the divided pieces in the axial direction of the water pipe K can be obtained. The side surfaces of the protrusions 22 and 23 are formed by inclined surfaces that are inclined with respect to the circumferential direction of the water pipe K (the vertical direction in FIG. 5). The protrusion 23 is disposed in the central portion of the case body 12 in the axial direction, and is fitted between the pair of protrusions 22 by tightening the dividing portion 10. The side surface of the protrusion 23 is in surface contact with the side surface of the protrusion 22, but the present invention is not limited to this, and an effect of suppressing displacement is obtained even in line contact (for example, see FIG. 9A) or point contact. It is done.

  In this embodiment, when the division part 10 is seen from the front as shown in FIGS. 4 and 5, the protrusions 21 and the protrusions 22 are arranged at two positions on the left and right sides of the central part in the axial direction of the case body 12. Yes. When the divided portion 10 is tightened, it may be tightened until they are evenly contacted on the left and right sides, so that tightening management can be appropriately performed. The protrusions 21 and / or protrusions 22 are preferably disposed on the outer end face of the joint surface 14 as shown in FIG. This makes it easier for the operator to visually recognize the state of the protrusions 21 and 22 and improves workability.

  In the present embodiment, the example in which the protrusion 21 and the protrusion 22 are integrally provided with the joint surface 14 is shown. However, the present invention is not limited to this, and for example, the protrusion 21 and / or the protrusion 22 is connected to the joint surface 14. It may be configured to be detachable. According to such a configuration, the protrusion 21 can be easily removed and the removed protrusion 21 can be recovered. Even in such a case, the protrusion 21 and the protrusion 22 are formed of a material harder than the sealing material 11, and are preferably formed of a rigid body such as a resin material or a metal material.

[Second Embodiment]
In 2nd Embodiment, with reference to FIG.6, 7, the housing | casing apparatus used for the continuous waterworks method of the existing water pipe is illustrated. FIG. 6 is a front view of an outer valve box as a casing device. FIG. 7 is a plan view showing a lower divided piece among a plurality of divided pieces constituting the outer valve box. Since the second embodiment is the same as the first embodiment except for the items described below, the differences will be mainly described while omitting the common points as much as possible. The same members as those described in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  6 and 7 show an outer valve box 3 (an example of a casing device) of a valve device used in an existing water pipe K continuous water construction method. The outer valve box 3 has a divided portion 30 at least at one place in the circumferential direction (two places in the present embodiment), and seals the outer peripheral surface of the water pipe K (not shown in FIG. 7) via a sealing material 31. An annular case body 32 that surrounds in the state is provided, and a fastener 33 that joins the plurality of divided pieces 32a and 32b constituting the case body 32 by fastening the divided portion 30. The case body 32 is configured as a split T-shaped tube that is divided into upper and lower parts. The case body 32 is made of, for example, ductile cast iron.

  Flange-shaped joining surfaces 34 are provided at the circumferential ends of the divided pieces 32a and 32b, respectively. A sealing material 31 is attached to the lower divided piece 32 a as shown in FIG. 7, and the sealing material 31 is fitted into a groove 35 formed in the joining surface 34. The sealing material is also attached to the upper divided piece 32b in the same manner. In each divided portion 30, the pair of joining surfaces 34 and 34 face each other, and the sealing material 31 that is in close contact with each other as the fastener 33 is tightened seals the gap between the divided portions 30. The upper divided piece 32b is provided with an opening 36 that opens upward.

  An inner valve box (not shown) containing a valve body is accommodated in the outer valve box 3 (case body 32), and the upper part of the inner valve box is covered with a valve lid (not shown). The The valve body is configured to move up and down or rotate according to the operation of the valve shaft supported by the valve lid, and the flow path of the water flowing in the water pipe K according to the lift or rotation of the valve body. Blocking or switching is performed. The inner valve box has a cylindrical shape as a whole, and is disposed inside the outer valve box 3 through the opening 36 in a state where the axial direction thereof is directed vertically. The space between the outer valve box 3 and the inner valve box is sealed by a sealing material 31 (the protruding portion 31p). Such a valve device is described in, for example, JP-A-2006-173133 by the present applicant.

  A protrusion 41 (corresponding to a first protrusion) and a protrusion 42 (corresponding to a second protrusion) having a smaller protrusion amount than the protrusion 41 are formed on the joint surface 34. The protrusion 41 defines a gap G1 ′ (corresponding to a first gap) when the dividing portion 30 is tightened, and the protrusion 42 is a gap when the dividing portion 30 is tightened by removing the protrusion 41. A gap (corresponding to the second gap) smaller than G1 ′ is defined in the dividing section 30. A pair of joining surfaces 34 and 34 facing each other in the dividing portion 30 are shown in FIG. 6, and FIGS. 4 and 5 shown in the first embodiment can be referred to for this enlarged view.

  As shown in FIG. 6 (and FIGS. 4 and 5), each of the protrusion 41 and the protrusion 42 is composed of a pair of protrusion pieces that are brought into contact with each other when the dividing portion 30 is tightened. The protrusion pieces 41a and 42a shown in FIG. 7 are one of a pair of protrusion pieces constituting the protrusion 41 and the protrusion 42, respectively. Further, a protrusion 43 (corresponding to a third protrusion) is formed on the bonding surface 34. The detailed configuration and operation of the protrusions 41 to 43 corresponding to the first to third protrusions are as already described in the first embodiment.

  In the present embodiment, a protruding portion 31 p that protrudes into the internal space of the case body 32 when the divided portion 30 is tightened is formed in the sealing material 31. The protruding portion 31p protrudes into the internal space of the case body 32, thereby abutting against a member (that is, an inner valve box) disposed inside the case body 32 and sealing between the member and the outer valve box 3. . The protruding portion 31p is set at two places on the left and right sides with respect to the central portion of the case body 32 in the axial direction, but is not limited thereto, and may be one place, for example.

  As described above, in the outer valve box 3, there are a case where the dividing portion 30 is tightened in a state where the protrusion 41 is formed, and a case where the dividing portion 30 is tightened by removing the protrusion 41. In the latter case, since the amount of tightening of the divided portion 30 is relatively large, the protruding portion 31p is easily protruded sufficiently. In the former case, the amount of tightening of the divided portion 30 is relatively small, so that the protruding portion 31p is There is a risk that it will not protrude sufficiently. Therefore, a protrusion 44 (corresponding to a fourth protrusion) is formed on the joint surface 34 so that the protrusion 31p protrudes sufficiently. The protrusion 44 is in contact with the outer surface of the sealing material 31 at the location where the protruding portion 31p is formed.

  The protrusions 44 suppress the bulging of the sealing material 31 to the outside (the radially outer side of the fluid pipe) where the protrusions 31p are formed. When tightening, the protrusion to the inside of the protrusion 31p (that is, the internal space of the case body 32) can be promoted. When removing the protrusion 41 and tightening the dividing portion 30, the protrusion amount may be adjusted by removing (shaving) the protrusion 44 and the groove wall around the protrusion 31 p as necessary. Thereby, the amount of protrusion of the protrusion 31p can be made equal between the case where the protrusion 41 is present and the case where the protrusion 41 is not.

  Further, as shown in FIG. 7, a protrusion 45 (in other words, a fifth protrusion) is formed in the groove 35 formed in the joint surface 34, and the protrusion 45 promotes the protrusion to the inside of the protruding portion 31 p. You may do it. Such a configuration is particularly useful when the above-described difference in tightening amount is large. The protrusion 45 can be formed instead of or in addition to the protrusion 44.

  Next, an example of a procedure for installing the valve device by the continuous water construction method will be briefly described. First, the outer valve box 3 is mounted in a required area of a pipe of a water pipe (for example, a cast iron pipe having a nominal diameter of φ200). At this time, the divided portion 30 is tightened by the operation of the fastener 33, the divided piece 32 b is joined to the divided piece 32 a, and the gap of the divided portion 30 is sealed with the sealing material 31. When mounting on a water pipe having a smaller outer diameter (for example, a steel pipe having a nominal diameter of φ200), the divided portion 30 from which the protrusion 41 is removed is tightened to join the divided pieces 32a and 32b, and the gap G1 defined by the protrusion 41 A gap smaller than 'is defined in the divided portion 30 by the protrusion 42.

  When the fastening of the divided portion 30 by the fastener 33 is completed, a hole saw as a perforating device is attached to the opening 36, and the water pipe is cut in an indefinite water state. If necessary, the drain 37 is opened to drain water, and chips generated by cutting are discharged to the outside. When the water pipe has been cut, lift the hole saw. Then, the inner valve box containing the valve body is inserted into the outer valve box 3, and the upper part thereof is covered with a valve lid to complete the installation work of the valve device. The sealing performance between the outer valve box 3 and the inner valve box can be confirmed based on whether or not water is continuously discharged when the plug 38 of the outer valve box 3 is removed.

[Third Embodiment]
In 3rd Embodiment, with reference to FIG. 8, the housing | casing apparatus used for the leak repair of the coupling part of the existing water pipe is illustrated. Since the third embodiment is the same as the first embodiment except for the items described below, common points such as a case body and a fastener are omitted, and differences will be mainly described. The same members as those described in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. The structure of the division | segmentation part demonstrated by 3rd Embodiment is applicable also to the housing | casing apparatus used for a continuous water construction method.

  In the example of FIG. 8, the protrusion 51 that can define the gap C in the divided portion 10 when the divided portion 10 is fastened to the joint surface 14, and the uneven portion 53 that can suppress the relative displacement between the divided pieces. And are formed. Since the protrusion 51 and the concavo-convex part 53 have the same shape as the protrusion 21 (first protrusion) and the protrusion 23 (third protrusion) in the above-described embodiment, respectively, redundant description is omitted. However, the concavo-convex portion 53 suppresses a relative positional shift between the divided pieces by fitting a convex portion formed on one of the pair of joint surfaces 14 and 14 into a concave portion formed on the other. . The uneven portion 53 may have a shape as shown in FIG.

  FIG. 8A shows a state in which the dividing portion 10 is tightened. A gap C is formed in the dividing portion 10 by the protrusion 51. The amount of protrusion of the protrusion 51 is an appropriate size for bringing the seal material 11 (not shown in FIG. 8) into close contact with a fluid pipe having a relatively large outer diameter (for example, a ductile cast iron pipe having a nominal diameter of φ200). The gap C is set to a predetermined size so as to be defined in the dividing portion 10. Since the operator only has to operate the fastener 13 (not shown in FIG. 8) and tighten the divided portion 10 until the gap C is defined by the protrusion 51, tightening management is easy.

  FIG. 8B shows a state in which the protruding portion 51 is removed and the dividing portion 10 is tightened. Opposing bonding surfaces 14 and 14 are in close contact with each other, and there is no gap in the divided portion 10. This case body is designed so that when the joint surfaces 14 and 14 facing each other are in close contact with each other, the sealing material 11 is appropriately in close contact with a fluid pipe having a relatively small outer diameter (for example, a steel pipe having a nominal diameter of φ200). ing. Since the operator only needs to tighten the dividing portion 10 until the opposing joining surfaces 14 and 14 are in close contact with each other, the tightening management is easy. In addition, the uneven position 53 can suppress the relative displacement between the divided pieces, and by selecting whether or not to remove the protrusion 5, it is possible to cope with fluid pipes having different outer diameters.

[Other Embodiments]
In the first embodiment described above, an example in which the side surface of the projection 23 is in contact with the side surface of the projection 22 in the process of removing the projection 21 and tightening the dividing portion 10 has been described. For example, as shown in FIG. 9A, in the process of tightening the divided portion where the protrusion 21 is formed, the side surface of the protrusion 23 is brought into contact with the side surface of the protrusion 22, thereby suppressing the relative displacement between the divided pieces. May be. In FIG. 9A, the side surface of the protrusion 23 is in line contact with the side surface of the protrusion 22. FIG. 9B shows a state in which the protrusion 21 is removed and the dividing portion is tightened, and the side surface of the protrusion 23 is in surface contact with the side surface of the protrusion 22. The side surfaces of the protrusions 22 and 23 are formed as inclined surfaces from the middle thereof, thereby enhancing the effect of suppressing displacement. Such a shape is also applicable in the second embodiment.

  In the above-mentioned embodiment, although the example which mounts a housing | casing apparatus to the water pipe K as a ductile cast iron pipe or a steel pipe was shown, it is not restricted to this, The fluid pipe | tube formed with other materials, such as a vinyl chloride pipe | tube, is made into object. You can also

  The casing device according to the present invention can be applied to water pipes, but is not limited to this, and can be widely applied to fluid pipes used for various liquids other than water, such as gas.

  The present invention is not limited to the embodiment described above, and various improvements and modifications can be made without departing from the spirit of the present invention.

1 Leakage repair device (an example of a housing device)
3 Outer valve box (an example of a housing device)
DESCRIPTION OF SYMBOLS 10 Dividing part 11 Sealing material 12 Case body 12a Dividing piece 12b Dividing piece 12c Dividing piece 13 Fastener 14 Joining surface 21 Protrusion (1st protrusion)
21a Projection piece 21b Projection piece 22 Projection (second projection)
22a Projection piece 22b Projection piece 23 Projection (third projection)
30 Dividing part 31 Sealing material 31p Protruding part 32 Case body 33 Fastener 34 Joining surface 41 Protrusion (first protrusion)
42 Protrusion (second protrusion)
43 Protrusion (third protrusion)
44 Protrusion (fourth protrusion)
45 protrusion (fifth protrusion)
51 Protrusion 53 Concavity and convexity C Crevice G1 Gap (first gap)
G2 gap (second gap)

Claims (10)

An annular case body having a divided portion at least in one circumferential direction and surrounding the outer peripheral surface of the fluid pipe in a sealed state via a sealing material;
A fastener that joins a plurality of divided pieces constituting the case body by tightening the divided portion; and
A first projection and a second projection having a smaller projection amount than the first projection are formed on a joint surface provided at a circumferential end of the divided piece,
The first protrusion can define a first gap in the divided portion when the divided portion is tightened;
The casing device capable of defining a second gap smaller than the first gap in the divided portion when the second projection is removed and the divided portion is tightened.   The casing device according to claim 1, wherein the first protrusion and / or the second protrusion is formed of a pair of protrusion pieces that are brought into contact with each other when the divided portion is tightened. A third protrusion is formed on the joint surface;
3. The housing device according to claim 1, wherein a side surface of the third protrusion comes into contact with a side surface of the second protrusion in a process of tightening the divided portion. A fourth protrusion is formed on the joint surface;
A protruding portion that protrudes into the internal space of the case body when the divided portion is fastened to the sealing material is formed,
The casing device according to any one of claims 1 to 3, wherein the fourth protrusion is in contact with an outer surface of the sealing material at a location where the protruding portion is formed. An annular case body having a divided portion at least in one circumferential direction and surrounding the outer peripheral surface of the fluid pipe in a sealed state via a sealing material;
A fastener that joins a plurality of divided pieces constituting the case body by tightening the divided portion; and
Protrusions that can define a gap in the split portion when the split portion is tightened to the joint surface provided at the circumferential end of the split piece, and relative displacement between the split pieces can be suppressed. And uneven parts are formed,
A casing device configured such that when the protruding portion is removed and the divided portion is tightened, the opposing joint surfaces are in close contact with each other. A mounting method of a casing device comprising an annular case body having a divided portion at least at one place in the circumferential direction, and a fastener for fastening the divided portion,
A first protrusion and a second protrusion having a smaller protrusion amount than the first protrusion are formed on a joint surface provided at a circumferential end of the plurality of divided pieces constituting the case body. The first protrusion can define a first gap in the divided portion when the divided portion is tightened;
When the case body surrounds the outer peripheral surface of the fluid pipe in a sealed state, the divided portion from which the first protrusion is removed is tightened to join the plurality of divided pieces, and a second smaller than the first gap. A mounting method for a casing device, wherein a gap is defined in the divided portion by the second protrusion.   The mounting | wearing of the housing | casing apparatus of Claim 6 by which a pair of projection piece which comprises the said 2nd protrusion mutually abuts when the said division | segmentation part is clamp | tightened, and thereby defines the said 2nd clearance gap in the said division | segmentation part. Method.   The mounting method of the housing | casing apparatus of Claim 6 or 7 which makes the side surface of the 3rd protrusion formed in the said joint surface contact the side surface of the said 2nd protrusion in the process of tightening the said division | segmentation part.   By tightening the divided portion, the protruding portion of the sealing material disposed inside the case body is protruded into the internal space of the case body, and the fourth protrusion formed on the joint surface is provided with the protruding portion. The mounting method of the housing | casing apparatus of any one of Claims 6-8 contact | abutted on the outer surface of the said sealing material in the formation location. A mounting method of a casing device comprising an annular case body having a divided portion at least at one place in the circumferential direction, and a fastener for fastening the divided portion,
On the joint surface provided at the circumferential end of the plurality of divided pieces constituting the case body, a protrusion that can define a gap in the divided portion when the divided portion is tightened, and the divided pieces An uneven portion that can suppress relative displacement is formed,
When the outer peripheral surface of the fluid pipe is surrounded in a sealed state by the case body, the divided portions from which the protrusions have been removed are tightened to join the plurality of divided pieces, and the relative positions of the divided pieces by the uneven portions. A mounting method for a housing apparatus, wherein the opposing joint surfaces are brought into close contact with each other while suppressing displacement.

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