JP2006214451A - Case device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a case device which can suppress time and effort or costs for manufacturing a seal body by miniaturizing the seal body capable of maintaining a hermetically-sealed state inside the case device. <P>SOLUTION: A tapered face 10c, which is expanded toward the outside over in the circumferential direction, and a seal face 10d are formed to the inner face of a socket formed by the joining of the divided cases 11, 12 each other. The seal body is composed of packing 62, which is interposed between the joining faces of the divided cases each other, and a sealing material which is fittingly inserted to a gap between the inner face of the case and the outer face of an existing fluid pipe by the pressing pressure of a pressing ring. The packing 62 is composed of an extended material 62a, which is arranged to the joining faces of the divided cases 11, 12 each other along in the longitudinal direction, and an end material 62c protruded toward the inner face of the socket. The end face 62c1 of the end material 62c is formed so as to be nearly flush at least with the seal face 10d. The end face 62c1 of the end material 62c maintains the hermetically-sealed state between the inner face of the socket and the outer face of the existing fluid pipe by being brought into contact with the sealing material. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a casing device in which an outer peripheral surface of an existing fluid pipe is surrounded by a split casing having at least a split structure, and an internal sealed state can be maintained by a seal body.

  In a conventional casing device, a seal body interposed in the casing device is formed with a packing formed in the longitudinal direction between the joint surfaces of the divided casing, and an existing fluid pipe formed integrally with the end portion of the packing It is comprised from the sealing material formed cyclically | annularly over the outer peripheral direction (for example, refer patent document 1).

JP-A-11-132371 (page 3, FIG. 3)

  However, in Patent Document 1, the seal body is composed of a packing formed over the longitudinal direction of the divided housing and a sealing material integrally formed at the end of the packing. In addition, the contact pressure between the casings due to the packing and the contact pressure between the casing device and the existing fluid pipe due to the sealing material are uniformly determined, and adjustment to prevent water leakage may be difficult.

  The present invention has been made paying attention to such a problem. The sealing body interposed in the casing device is divided, the contact pressure between the casings by packing, and the casing apparatus and existing fluid by the sealing material. It is an object of the present invention to provide a casing device that can adjust the contact pressure with a tube and maintain an internal sealed state.

In order to solve the above-mentioned problem, a housing device according to claim 1 of the present invention surrounds the outer peripheral surface of an existing fluid pipe with at least a divided housing having a divided structure, and the sealed state of the inside is sealed by a sealing body. A housing device that can be maintained,
On the inner surface of the receiving port formed by joining the divided housings, a guide surface that expands outward in the circumferential direction and a seal surface on the inner side of the guide surface are formed. And the seal body is formed separately from the packing interposed between the joint surfaces of the divided housings, and the packing, and the outside of the receiving port is formed in the gap between the inner surface of the receiving port and the outer surface of the existing fluid pipe. A seal material that is inserted by pressing of the push ring, and the packing is integrated with the extending member disposed along the longitudinal direction on the joint surface between the divided housings, and at the end of the extending member And the end surface of the end material is substantially flush with at least the sealing surface, and the end surface of the end material is the sealing material. To maintain a sealed state between the inner surface of the receiving port and the outer surface of the existing fluid pipe It is characterized in Rukoto.
According to this feature, the seal body is divided into a seal that seals the divided housings and a seal material that is separate from the seal and seals the gap between the housing device and the existing fluid pipe. The contact pressure of each material can be adjusted, and the sealed state inside the casing device can be maintained.

A casing device according to a second aspect of the present invention is the casing device according to the first aspect, wherein the seal surface which is an inner surface of the receiving port extends along a longitudinal direction with an outer surface of the existing fluid pipe. The seal material is formed so that the head of the seal member has a substantially circular cross section and can be fitted into the gap between the seal surface and the outer surface of the existing fluid pipe. .
According to this feature, the seal surface, which is the inner surface of the receiving port, is formed substantially parallel to the outer surface of the existing fluid pipe along the longitudinal direction, and is continuous including the joint surface between the divided casings along the circumferential direction. Therefore, the gap between the inner surface of the housing and the outer surface of the existing fluid pipe can be sealed with a strong contact pressure by the head portion of the sealing material.

The housing device according to claim 3 of the present invention is the housing device according to claim 1 or 2, wherein an end surface of the end material of the packing is formed substantially flush with the guide surface. It is characterized by being.
According to this feature, since the guide surface is continuously formed to be substantially flush along the circumferential direction including the joint surface between the divided housings, the seal material is pressed when the seal material is pressed by the push ring. Can be prevented from being damaged by the step between the joint surfaces of the divided housings.

A casing device according to a fourth aspect of the present invention is the casing device according to any one of the first to third aspects, wherein the extending member and the end member have substantially the same thickness. In addition, it is characterized in that it is sandwiched between the joint surfaces of the divided casings with substantially the same pressing force along the longitudinal direction.
According to this feature, the stretched material and the end material have substantially the same thickness, and are sandwiched between the joint surfaces of the divided housings with substantially the same pressing force along the longitudinal direction. Since the adjustment of the tightening pressure is easy when the divided casings are clamped together with the end material sandwiched between them, the joining process of the divided casings is simplified.

A casing device according to a fifth aspect of the present invention is the casing device according to any one of the first to fourth aspects, wherein a guide portion made of a convex member along the longitudinal direction is formed on the joint surface. A notch is formed at a predetermined position where the end material of the packing extends toward the inner surface of the casing, at least on the convex member provided on the inner surface side of the casing device. It is characterized by that.
According to this feature, the convex member is configured along the longitudinal direction of the joint surface of the divided housing, and the notch is formed at a predetermined position where the end material of the packing extends toward the inner surface of the housing device. Therefore, positioning in the case of arranging the extending member and the end member is facilitated, and a smooth joining operation of the divided housing is possible.

A casing device according to a sixth aspect of the present invention is the casing device according to any one of the first to fourth aspects, wherein a guide portion made of a concave groove along the longitudinal direction is formed on the joint surface. A gap portion is formed at a predetermined position in which the end material of the packing extends toward the inner surface of the housing, at least in the concave groove provided on the inner surface side of the housing device. It is characterized by.
According to this feature, the groove is formed along the longitudinal direction of the joint surface of the divided housing, and the end portion of the packing extends to the inner surface of the housing device at a predetermined position on the side wall portion of the groove. Since the gap portion is formed toward the inner surface of the casing device, positioning when arranging the extending member and the plate member is facilitated, and a smooth joining operation of the divided casings becomes possible.

A casing device according to a seventh aspect of the present invention is the casing device according to any one of the first to sixth aspects, wherein the joint between the joint surfaces of the split housing is a flange of the split housing. It has a tightening structure using bolts between each other, and a spacer having a predetermined height is fixed to at least one of the joint surfaces in the vicinity of the outside of the casing device along the longitudinal direction of the casing device. It is characterized by being.
According to this feature, when joining the divided housings by bolt tightening, the joint surfaces are kept at a constant width along the longitudinal direction of the housing device, and an equal pressing force is applied to the packing disposed between the joint surfaces. It can be secured.

  Examples of the present invention will be described below.

  An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1A is a perspective view showing an entire image of a butterfly valve, and FIG. 1B is an entire image of a casing device in the first embodiment of the present invention. FIG. FIG. 2A is a longitudinal sectional view inside the casing device, and FIG. 2B is a longitudinal sectional view showing a state in which a butterfly valve is similarly installed. FIG. 3A is a plan view of a bonding surface of the upper housing, and FIG. 3B is a plan view of the bonding surface of the lower housing. 4A is a plan view of the packing, FIG. 4B is a sectional view taken along the line BB, and FIG. 4C is a sectional view taken along the line CC. FIG. 5 is an enlarged perspective view showing a state in which a packing is installed between the upper housing and the lower housing. FIG. 6 is an AA enlarged cross-sectional view in which the upper housing and the lower housing are joined via packing. FIG. 7A is a plan view of the joint surface of the upper housing according to the second embodiment of the present invention, and FIG. 7B is a plan view of the joint surface of the lower housing. FIG. 8 is an enlarged perspective view showing a state in which packing is installed between the upper housing and the lower housing in the second embodiment. FIG. 9A is an enlarged cross-sectional view of the dotted line encircled portion of FIG. 2A, and FIG. 9B is an enlarged cross-sectional view of FIG.

  As shown in FIG. 1B, the casing device 10 in the first embodiment of the present invention includes an upper casing 11 (divided casing) that surrounds an existing water pipe 1 (existing fluid pipe) from above and below. And a lower housing 12 (divided housing), and a circular upper opening U opened upward is formed so that the butterfly valve 4 (water control body) shown in FIG. 1A can be installed. Has been.

  The casing device 10 includes a cylindrical portion 10a having an inner diameter larger than the outer diameter of the existing water pipe 1, and a horizontal cylindrical portion 10b (receiving port) that communicates with the cylindrical portion 10a and is substantially orthogonal. Thus, two circular side openings A and A ′ opened in the horizontal direction are formed at both ends of the horizontal cylindrical portion 10b.

  As shown in FIG. 1B and FIG. 2A, the side opening A and the side having the same central axis C in the horizontal direction and located opposite to each other on the side surface of the casing device 10 The inner diameter of the opening A ′ is substantially the same or slightly larger than the outer diameter of the existing water pipe 1.

  Referring to FIG. 1 (b), the mounting of the casing device 10 on the existing water pipe 1 will be described. The upper housing 11 and the lower housing 12 are aligned with the central axis C and the pipe axis of the existing water pipe 1. Attach to the outer periphery of the existing water pipe 1. The joint part of the upper housing | casing 11 and the lower housing | casing 12 with which the outer peripheral part of the existing water pipe 1 was mounted | worn is formed with the joint surfaces 11a and 12a which consist of a flange, respectively, and it mentions later using FIG.3 and FIG.4. As described above, flange joining is performed between the joint surface 11 a of the upper housing 11 and the joint surface 12 a of the lower housing 12 via the packing 62.

  Moreover, as shown in FIG. 2 (a), in the opening A and the opening A ′, between the inner peripheral surface of the horizontal tubular portion 10b and the outer peripheral surface of the existing water pipe 1, in the circumferential direction, The sealing material 53 is separated from the packing 62 by a split structure push ring 50 having a flange portion 60 having an inner diameter slightly larger than the outer peripheral surface of the existing water pipe 1 via a sealing material 53 made of a rubber body. The casing device 10 and the outer peripheral surface of the existing water pipe 1 at the openings A and A ′ are sealed by being pushed into the inner side of the horizontal tubular portion 10b.

  As shown in FIG. 9A, the sealing material 53 is formed in an annular shape having substantially the same cross-sectional shape in the circumferential direction, and has a cut at a predetermined location. It can attach to the outer peripheral surface of the arbitrary places of the existing water pipe 1 formed continuously.

  After the sealing material 53 is attached to the outer peripheral surface of the existing water pipe 1, the sealing material 53 expands in the peripheral direction by pushing the sealing material 53 into the inner side of the horizontal tubular portion 10 b by the push ring 50. The casing device 10 and the outer peripheral surface of the existing water pipe 1 are sealed.

  Therefore, the joining of the upper housing 11 and the lower housing 12 is a flange joining through the packing 62 over the longitudinal direction, and the outer peripheral direction of the existing water pipe 1 is provided at both ends of the opening A and the opening A ′. The inside of the casing device 10 is watertight by pushing the push wheel 50 through the sealing material 53 disposed over the space.

  In this way, the sealing body that seals the inside of the casing device 10 is a seal that seals the gap between the casing device 10 and the existing water pipe 1, the packing 62 that seals the upper casing 11 and the lower casing 12. Since it is divided into the material 53, the contact pressure between the packing 62 and the seal material 53 can be adjusted, and the sealed state inside the housing device 10 can be maintained.

  Next, the process of cutting the existing water pipe 1 will be described. With the casing device 10 sealed to the existing water pipe 1 as described above, the upper opening U can be opened and closed freely. A cutting device (not shown) for the existing water pipe 1 is disposed inside a working cylinder (not shown) communicating with a valve (not shown) and the casing device 10 attached via the on-off valve. The existing water pipe 1 in the apparatus 10 is cut to a predetermined length while discharging chips in an undisrupted water state. Next, the tube piece after cutting and the cutting device are carried out of the casing device 10.

  Next, after carrying out the pipe piece and chips of the existing water pipe 1, an insertion device (not shown) in which the butterfly valve 4 is inserted is disposed inside, and the on-off valve is opened to open the butterfly valve 4. Is installed in the casing device 10.

  As shown in FIG. 1A, the butterfly valve 4 includes a partition wall 6 having a valve body 7 that can open and close an opening H around an opening / closing shaft 40, and an upper lid that is formed integrally with an upper portion of the partition wall 6. The unit 5 is installed at a predetermined position in the casing device 10 while being guided between a pair of guide pieces 21 and 21 provided on the inner surface of the casing device 10.

  A seal 8 a is formed on the peripheral surface of the upper lid portion 5 so as to be in watertight pressure contact with a step portion 19 provided on the inner surface of the housing device 10. Similarly, as shown in FIGS. 2A and 2B, seals 8 b are provided on both side surfaces and the bottom surface of the partition wall 6 on the inner surface of the casing device 10 at the position where the butterfly valve 4 is installed. The step portion 15 and a part of the bottom surface of the casing device 10 are formed so as to be in watertight pressure contact with the bulged step portion 16.

  Further, on the lower side of the side surface of the casing device 10, openable and closable discharge ports 13 and 13 are provided on the upstream side and the downstream side of the butterfly valve 4 installed inside the casing device 10. The outlets 13 and 13 can communicate with the outside of the casing device 10 when the existing water pipe 1 described later is cut.

  Next, each part of the housing | casing apparatus 10 is demonstrated in detail.

  As shown in FIGS. 3A and 3B, the casing device 10 includes an upper casing 11 and a lower casing 12, and the upper casing 11 and the lower casing 12 are joined surfaces having substantially the same shape. 11a and 12a are formed, and the joining surfaces 11a and 12a can be joined via a packing 62 made of a rubber body shown in FIG. Bolt holes 11b and 12b are formed at predetermined intervals along the longitudinal direction on the outer side of the casing device 10 of the respective joint surfaces 11a and 12a. As shown in FIG. The casing device 10 can be joined by a bolt and nut 54.

  As shown in FIG. 3B, convex members 55 and 56 are arranged on the upper surface of the joint surface 12 a of the lower casing 12 on both the inner and outer sides of the lower casing 12 along the shape of the longitudinal direction. A packing 62 shown in FIG. 4A is arranged between 55 and 56.

  Further, the packing 62 of this embodiment shown in FIG. 4A has a cross section in which an intermediate portion is formed in an arc shape in advance along the joining surface shape of the lower housing 12 as shown in FIG. 4C. Similarly, the casing packing 62a (extension material) is formed in a substantially circular shape, and the water control body packing 62b is formed from a central portion of the casing packing 62a and has a square cross section. As shown in FIG. 4 (b), the seal packing 62c (end material) extends from both ends of the casing packing 62a and has a square cross section.

  Further, the convex member 56 provided on the inner side of the lower housing 12 is formed with a notch 56a at the center of the cylindrical portion and notches 56b at both ends of the lower housing 12 as shown in FIG. Is done.

  Therefore, the positioning in the case where the casing packing 62a and the sealing material packing 62c of the packing 62 are arranged is facilitated, and the upper casing 11 and the lower casing 12 can be smoothly joined.

  Further, the upper casing 11 and the lower casing 12 are sealed by the casing packing 62a of the packing 62 along the longitudinal direction, and the sealing member 53 horizontally inserted into the horizontal cylindrical portion 10b of the casing device 10 is installed. As will be described later, the end surface of the cylindrical portion 10b is sealed by a sealing material packing 62c formed substantially flush with the inner surface of the horizontal cylindrical portion 10b.

  Further, as shown in FIGS. 4B and 4C, the casing packing 62a, the water control body packing 62b, and the sealing material packing 62c of the packing 62 have substantially the same thickness in the longitudinal direction. When the joining surface 11a of the upper housing 11 and the joining surface 12a of the lower housing 12 are joined, the housing packing 62a, the water control body packing 62b, and the sealing material packing 62c are Since it is clamped between the joining surfaces 11a and 12a by substantially the same pressing force along the longitudinal direction, it is easy to adjust the clamping pressure when the upper casing 11 and the lower casing 12 are clamped with the packing interposed therebetween. The joining process of the upper housing | casing 11 and the lower housing | casing 12 becomes easy.

  Further, as shown in FIG. 3 (b), the upper surface of the joint surface 12a of the lower housing 12 has substantially the same height as the convex members 55 and 56 near the outside of the lower housing 12 at predetermined intervals along the longitudinal direction. The spacer 57 is fixed, and when the upper housing 11 and the lower housing 12 are joined by the bolt nut 54, the joining surface 11a of the upper housing 11 and the joining surface 12a of the lower housing 12 are connected. The gap is kept constant along the longitudinal direction of the housing, and an equal pressing force to the packing 62 disposed between the joining surfaces 11a and 12a can be secured.

  Further, as shown in FIG. 2A, the housing device 10 has an adjustment bolt 61 that presses and holds the outer peripheral wall from the outer surface toward the pipe axis direction of the existing water pipe 1. It is arrange | positioned by the predetermined space | interval in the outer peripheral direction, and by screwing each adjustment bolt 61 from an outer surface and pressing the outer peripheral wall of the existing water pipe 1, the pipe axis of the existing water pipe 1 and the housing device 10 Adjustment with the tube axis C of the horizontal cylindrical part 10b is attained.

  As shown in FIG. 2A, the inner peripheral surface in the vicinity of the outer end portion of the horizontal cylindrical portion 10b has a tapered surface 10c (guide surface) that is tapered from the outer end portion toward the inside. And formed further inward than the tapered surface 10c, and is formed in the shape of the outer surface of the existing water pipe 1 and a parallel surface 10d (seal surface) parallel to the longitudinal direction in the circumferential direction.

  As shown in FIG. 5, the end face 62c1 of the seal material packing 62c of the packing 62 has a shape corresponding to the shape formed by the tapered surface 10c and the parallel surface 10d formed on the inner peripheral surface of the horizontal cylindrical portion 10b. In the state where the upper casing 11 and the lower casing 12 are joined via the packing 62, the inner peripheral surface of the horizontal cylindrical portion 10b and the end surface 62c1 of the seal material packing 62c are arranged in the circumferential direction. It is formed to be substantially flush throughout.

  Further, as shown in FIG. 9A, the sealing material 53 is formed in an annular shape having an inner diameter substantially the same as the outer diameter of the existing water pipe 1, and is disposed on the outer periphery of the existing water pipe 1, The shape of the material 53 is a front portion 53a (head) having a substantially circular cross section so as to be in close contact with the shape formed by the tapered surface 10c and the parallel surface 10d formed on the inner peripheral surface of the horizontal cylindrical portion 10b. And the cross section is formed in the shape which consists of the substantially trapezoidal rear part 53b over the circumferential direction.

  By screwing the bolt nuts 51 engaged through the bolt holes 17a of the flange 17 and the bolt holes 50a of the push ring 50 that are opposed to each other on the outer peripheral surfaces of the both ends of the horizontal cylindrical portion 10b, As the outer end surface of the flange 17 and the inner end surface of the push ring 50 are brought close to each other, the seal member 53 is formed on the inner surface of the push ring 50 over the circumferential direction by the collar portion 60 formed on the inner surface of the push ring 50. It is pressed inward and enters the inside of the horizontal tubular portion 10b while sliding between the outer peripheral surface of the existing water pipe 1 and the inner peripheral surface near the outer end of the horizontal tubular portion 10b.

  And as FIG.9 (b) shows, the front part 53a of the sealing material 53 approachs inward beyond the diameter-reduced location of the taper surface 10c, and the parallel surface 10d and the outer surface of the existing water pipe 1 and The rear portion 53b of the sealing material 53 is similarly pressed against the tapered surface 10c.

  That is, as shown in FIG. 5, the parallel surface 10 d that is the inner surface of the horizontal tubular portion 10 b is formed substantially parallel to the outer surface of the existing water pipe 1 along the longitudinal direction, and the upper casing along the circumferential direction. 11 and the lower housing 12 are continuously formed so as to be substantially flush with each other, so that the gap between the inner surface of the horizontal tubular portion 10b and the outer surface of the existing water pipe 1 is formed by the front portion 53a of the sealing material 53. Can be sealed with strong contact pressure.

  In particular, the end surface 62c1 of the seal material packing 62c extends substantially flush with the inner surface of the horizontal cylindrical portion 10b and is in contact with the seal material 53. It is possible to prevent leakage in the longitudinal direction at the joint surface between the first housing 12 and the lower housing 12.

  Moreover, since the taper surface 10c is continuously formed substantially in the circumferential direction including the joining surface of the upper housing and the lower housing 12, the pressing member 50 presses the sealing material 53. In addition, it is possible to prevent the front portion 53 a of the sealing material 53 from being damaged by the step between the joint surfaces of the upper housing 11 and the lower housing 12.

  Further, by screwing the bolt and nut 51, the rear portion 53b of the sealing material 53 is brought into pressure contact with the tapered surface 10c formed on the inner surface of the horizontal cylindrical portion 10b. That is, the parallel surface 10d as well as the taper surface 10c can be made to function supplementarily as a seal portion that seals the gap between the inner surface of the horizontal tubular portion 10b and the outer surface of the existing water pipe 1.

  Next, by screwing each push bolt 52 provided over the circumferential direction of the push ring 50 toward the center of the tube axis, the tip claw of the push claw 64 provided at the end of the push bolt 52 becomes the existing water supply. The outer periphery of the pipe 1 is inserted into the outer periphery, and the push wheel 50 is held in place by the existing water pipe 1.

  Further, as shown in FIG. 6, the inner surface of the casing device 10 of the present embodiment is slightly thicker inward along the contact surface that contacts the butterfly valve 4 than the other inner surfaces. On the inner surface of the casing device 10 in which the step portion 15 is formed and the upper casing 11 and the lower casing 12 are joined via the packing 62, the end surface of the water control body packing 62 b is substantially the same as the end surface of the step portion 15. It is designed to be flush.

  Further, since the water control body packing 62b formed to be wide is formed substantially flush with the inner surface of the housing device 10 and abuts against the side surface of the butterfly valve 4, the seal between the front and back of the partition wall 6 is provided on the side surface of the butterfly valve 4. It becomes possible.

  A state in which the butterfly valve 4 is installed at a predetermined position inside the casing device 10 is shown in FIG. 2B, and the seal 8 a provided on the side peripheral surface of the upper lid portion 5 of the partition wall 6 and the casing device 10. The step portion 19 provided on the inner surface is in close water-tight contact, and similarly, the seal 8b provided on the side peripheral surface of the partition wall 6 and the step portion 15 provided on the inner side surface and the inner bottom surface of the casing device 10. Since the step portion 16 is in close water-tight contact, the flow of the in-pipe fluid from the upstream is blocked by the partition wall 6 when the valve body 7 is closed.

  Next, a second embodiment of the present invention will be described below. A description of the same parts as those described above is omitted.

  As shown in FIG. 7, the casing device according to the second embodiment of the present invention has a recess in which the casing packing 62a of the packing 62 can be fitted along the longitudinal direction on the joint surface of the lower casing 12 '. A groove 65 is formed, and at both ends of the concave groove 65, a gap portion 65b connected to the concave groove 65 is provided on the inner surface of the casing device 10 at a predetermined position where the seal material packing 62c extends toward the inner surface of the casing device 10. It is formed towards.

  Further, at a predetermined position where the water control body packing 62b extends toward the inner surface of the casing device 10, a gap portion 65a connected to the concave groove 65 is formed toward the inner surface of the casing device 10.

  Therefore, positioning when the packing for casing 62a and the packing for sealing material 62c of the packing 62 are arranged is facilitated, and a smooth joining operation between the upper casing 11 'and the lower casing 12' is possible.

  Further, as shown in FIG. 8, with the upper housing 11 ′ and the lower housing 12 ′ joined through the packing 62, the tapered surface 10c and the parallel surface 10d, which are the inner surfaces of the horizontal cylindrical portion 10b, The seal material packing 62c is substantially flush with the end surface 62c1 in the circumferential direction.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the butterfly valve 4 is installed as a water control body installed in the housing apparatus 10, but it is not always necessary to install a water control body in the housing apparatus 10, for example, an existing water supply An opening may be formed in a part of the pipe 1 to connect a branch pipe or the like. Further, if the water control body is installed, the butterfly valve 4 is not limited. For example, the valve body may be a sluice valve that is slidable with respect to the partition wall. It may be a partition body to be blocked.

  Moreover, in the said Example, the existing water pipe 1 was cut | disconnected in the continuous water state in the housing | casing apparatus 10, and the water control body was installed, However, It is not necessarily restricted to the operation | work in a continuous water state, The operation may be performed with a pipeline in a predetermined range including the casing device 10 in a water-stopped state.

  In the above embodiment, the pipe fluid of the existing water pipe 1 is clean water, but the pipe fluid may be sewage or gas.

  Moreover, in the said Example, although the material of the packing 62 consisted of the rubber body, if the inside of the housing | casing apparatus 10 can be sealed, the material of the packing 62 is not restricted to a rubber body, For example, resin etc. may be sufficient. Similarly, the material of the sealing material 53 is made of a rubber body. However, the material of the sealing material 53 is not limited to the rubber body as long as the inside of the casing device 10 can be sealed, and may be a resin, for example.

  In the packing 62 shape, the casing packing 62a may not be formed in a curve along the shape of the divided casings 11 and 12 in the longitudinal direction in advance, and the casing packing 62a that is formed in a straight line is divided. You may arrange | position in the curve along the shape of the longitudinal direction of the bodies 11 and 12. FIG.

  Moreover, the cross-sectional shape of the casing packing 62a (stretched material) may not be formed in a substantially circular shape, and may be formed in, for example, an elliptical shape or a rectangular shape.

  In addition, the shape, interval, and number of the spacers 57 are not limited to the present embodiment. For example, the spacers 57 may be formed along the longitudinal direction of the joint surface 12 a of the lower housing 12, or may be formed on the joint surface 11 a of the upper housing 11. It may be formed.

  Further, the height of the spacer 57 is not limited to the present embodiment, and may be formed substantially the same as or slightly lower than the height of the convex members 55 and 56 according to the shape of the packing 62.

  If the convex members 55 and 56 are formed on the inner and outer sides of the casing packing 62a along the longitudinal direction of the joint surface of the divided casings 11 and 12, they are not disposed in a continuous manner in the longitudinal direction. For example, notches may be formed at predetermined intervals.

  The casing device 10 is not limited to the vertically split structure as long as it is a split structure, and may be, for example, a structure that is split laterally with respect to the longitudinal direction of the existing water pipe 1, or a combination of vertical and side splits. It may be a structure. Moreover, it is not limited to two divisions, but may be a division structure of three or more divisions.

  The joining method of the divided casings 11 and 12 is not limited to flange joining using the bolt and nut 54 as long as they are joined via the packing 62, and may be a method of joining with a device such as a buckle or a belt.

  As long as the sealing material 53 is formed in an annular shape when sealing the gap between the inner surface of the casing device 10 and the outer surface of the existing water pipe 1, it does not have to have a cut at a predetermined location as in the present embodiment. For example, a divided structure of two divisions or three or more divisions may be used.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

(A) is a perspective view which shows the whole image of a butterfly valve, (b) is a perspective view which shows the whole image of the housing | casing apparatus in 1st Example of this invention. (A) is a longitudinal cross-sectional view in a housing | casing apparatus, (b) is a longitudinal cross-sectional view which similarly shows the state in which the butterfly valve was installed. (A) is the top view which looked at the joint surface of the upper housing | casing, (b) is the top view which looked at the joint surface of the lower housing | casing similarly. (A) is a packing top view, (b) is a BB sectional view, and (c) is a CC sectional view. It is an expansion perspective view which shows the state in which the packing was installed between the upper housing | casing and the lower housing | casing. It is AA expanded sectional drawing which joined the upper housing | casing and the lower housing | casing via packing. (A) is the top view which looked at the joint surface of the upper housing | casing in 2nd Example of this invention, (b) is the top view which looked at the joint surface of the lower housing | casing similarly. It is an expansion perspective view which shows the state by which packing was installed between the upper housing | casing and lower housing | casing in 2nd Example. (A) is an expanded sectional view of a dotted line enclosing part of Drawing 2 (a), and (b) is an enlarged sectional view of Drawing 2 (b) similarly.

Explanation of symbols

1 Existing water pipe (existing fluid pipe)
4 Butterfly valve 6 Partition walls 8a, 8b Seal 10 Housing device 10b Horizontal cylindrical portion (receiving port)
10c Tapered surface (guide surface)
10d Parallel surface (seal surface)
11 Upper case (split case)
12 Lower housing (split housing)
11a, 12a Joint surface 15, 16, 19 Step 50 Push ring 53 Seal material 53a Front (head)
53b Rear portions 55, 56 Convex members 56a, 56b Notch portion 57 Spacer 62 Packing 62a Housing packing (stretched material)
62c Sealing material packing (end material)
62c1 end face 65 concave groove 65a, 65b gap

Claims (7)

A casing device that surrounds an outer peripheral surface of an existing fluid pipe with at least a split casing having a split structure, and is capable of maintaining a sealed state inside by a seal body,
On the inner surface of the receiving port formed by joining the divided housings, a guide surface that expands outward in the circumferential direction and a seal surface on the inner side of the guide surface are formed. And the seal body is formed separately from the packing interposed between the joint surfaces of the divided housings and the packing, and the outer side of the receiving port is formed in the gap between the inner surface of the receiving port and the outer surface of the existing fluid pipe. A seal material that is inserted by pressing of the push ring, and the packing is integrated with the extending member disposed along the longitudinal direction on the joint surface between the divided housings, and the end of the extending member And the end surface of the end material is substantially flush with the sealing surface, and the end surface of the end material is the sealing material. To maintain a sealed state between the inner surface of the receiving port and the outer surface of the existing fluid pipe Housing and wherein the Rukoto.   The sealing surface that is the inner surface of the receiving port is formed substantially parallel to the outer surface of the existing fluid pipe along the longitudinal direction, and the head portion of the sealing material is formed in a substantially circular cross section, and the sealing surface The casing device according to claim 1, wherein the housing device is formed so as to be fitted into a gap between the outer fluid pipe and the outer surface of the existing fluid pipe.   The casing device according to claim 1, wherein an end surface of the end material of the packing is formed substantially flush with the guide surface.   The extending member and the end member have substantially the same thickness, and are sandwiched between the joining surfaces of the divided housings with substantially the same pressing force along the longitudinal direction. The casing device according to any one of 1 to 3.   A guide portion made of a convex member is formed along the longitudinal direction on the joint surface, and at least the end material of the packing is disposed in the casing on the convex member provided on the inner surface side of the casing device. The casing device according to any one of claims 1 to 4, wherein a notch is formed at a predetermined position extending toward the surface.   The joint surface is formed with a guide portion formed of a groove along the longitudinal direction, and at least the groove end provided on the inner surface side of the housing device has the end material of the packing in the housing. 5. The casing device according to claim 1, wherein a gap is formed at a predetermined position extending toward the surface.   The joining between the joining surfaces of the divided housings has a tightening structure using bolts between the flanges of the divided housings, and at least one of the joining surfaces extends along the longitudinal direction of the housing device. The casing device according to claim 1, wherein a spacer having a predetermined height is fixed in the vicinity of the outside of the casing device.

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