JP2009281500A - Pipe joint displacement preventing tool and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint displacement preventing tool and method which prevent the relative displacement of both spigot and socket portions in a pipe axial direction against unexpected outer force such as earthquake although permitting predetermined displacement without the need for much time and labor, and maintain sealing performance in an existing fluid pipe. <P>SOLUTION: The pipe joint displacement preventing tool includes, at least, a cylindrical body 10 arranged between the inner peripheral faces of both spigot and socket portions 1, 2 at their opposed position, having a split structure split in at least the axial direction, and consisting of split members 21, 22 provided with locking portions for permitting predetermined relative movement of them and locking them and through-holes 11, 12 having female screw portions 11a, 12a at opposite positions to the inner peripheral face of the spigot portion 1 and to the inner peripheral face of the socket portion 2, respectively, and bolts 17, 17 to be threaded through the female screw portions 11a, 12a of the through-holes 11, 12. The bolts 17, 17 have front ends 17b, 17b entering into recessed portions 1b, 2b formed in the inner peripheral faces of both spigot and socket portions 1, 2. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an insertion portion that constitutes one existing fluid pipe, a receiving portion that constitutes the other existing fluid pipe into which the insertion portion is inserted, and a seal portion that seals between the facing surfaces of both the mouth portions And a pipe joint movement preventing tool and method for allowing a predetermined amount of relative movement in the pipe axis direction of the both mouth portions and preventing them.

  The conventional pipe joint movement prevention device and method attach a screw member to the inner peripheral surface of the insertion portion and the receiving portion, and connect the screw member to a position facing the inner peripheral surface of both the mouth portions so as to cover the screw member. By arranging a ring, a predetermined amount of relative movement of both mouths is allowed and prevented in case an unexpected external force such as an earthquake acts on an existing fluid pipe (see, for example, Patent Document 1).

JP 2007-113644 (page 9, FIG. 4)

  However, in Patent Document 1, in order to attach a screw member, a female screw hole is formed by screwing a female screw portion on the inner peripheral surface of both mouth portions inside an existing fluid pipe that is a closed space. It was necessary and involved work.

  The present invention has been made paying attention to such problems, and allows a predetermined amount of relative movement in the tube axis direction of both mouths against an unexpected external force such as an earthquake without requiring labor. It is an object of the present invention to provide a pipe joint movement preventing tool and method capable of preventing the above and maintaining the sealing performance in an existing fluid pipe.

In order to solve the above problems, a pipe joint movement preventing device according to claim 1 of the present invention is provided.
An insertion port constituting one of the existing fluid pipes;
A receiving part constituting the other existing fluid pipe into which the insertion part is inserted;
In a pipe joint provided with a seal part that seals between the two mouth parts,
A pipe joint movement preventing device that is constructed over the inner peripheral surface of the both mouth parts, and that allows a predetermined amount of relative movement in the tube axis direction of both mouth parts to prevent it.
A locking portion that is arranged at opposing positions facing each other over the inner peripheral surfaces of the two mouth portions, has a divided structure that is divided at least in the axial direction, and allows a relative amount of mutual movement to be locked. A cylindrical shape composed of divided members each provided with a through hole having a female screw portion at a position facing the inner peripheral surface of the insertion portion and a position facing the inner peripheral surface of the receiving portion at the facing position. Body,
A bolt that is screwed into the female thread portion of the through-hole, respectively,
The bolt is characterized in that the front end side enters a recess formed in the inner peripheral surface of each of the two mouth portions.
According to this feature, the insertion portion and the receiving portion constituting the pipe joint of the existing fluid pipe have a cylindrical body made of divided members arranged at opposing positions facing each other, and the through hole Simplified components that do not require other members by integrating the cylindrical body and the bolts over the inner peripheral surfaces of both mouths via bolts that are respectively screwed into the female screw parts. Therefore, the relative movement in the tube axis direction of both mouths can be allowed and prevented by a predetermined amount. Therefore, the existing seals that seal between the two mouths are used to resist unforeseen external forces such as earthquakes. The degree of freedom of allowing a predetermined amount of relative movement of the portion in the tube axis direction can be maintained, and the sealing performance in the existing fluid tube can be maintained. Further, since the bolts are screwed into the female screw portions of the through holes provided in the respective divided members, the respective divided members can be easily assembled independently to the inner peripheral surfaces of both the mouth portions.

A pipe joint movement preventing device and method according to claim 2 of the present invention are the pipe joint movement preventing device according to claim 1,
A sealing member is provided on the outer peripheral surface of the cylindrical body, and the sealing member is configured so that an inner peripheral surface of the two mouth portions and an outer peripheral surface of the cylindrical body are in a state in which the divided members are moved relative to each other by a predetermined amount. It is characterized by maintaining a seal between the two.
According to this feature, since the sealing member maintains the seal between the inner peripheral surface of both the mouth portions and the outer peripheral surface of the cylindrical body even when the split member is relatively moved by a predetermined amount, the split member It is possible to eliminate the possibility of water leakage due to relative movement.

The pipe joint movement preventing device according to claim 3 of the present invention is
An insertion port constituting one of the existing fluid pipes;
A receiving part constituting the other existing fluid pipe into which the insertion part is inserted;
In a pipe joint provided with a seal part that seals between the two mouth parts,
A pipe joint movement preventing device that is constructed over the inner peripheral surface of the both mouth parts, and that allows a predetermined amount of relative movement in the tube axis direction of both mouth parts to prevent it.
Arranged at opposing positions across the inner peripheral surface of the two mouth portions, and having a divided structure divided at least in the axial direction, provided with an engaging portion on the inner surface side, A cylindrical body composed of divided members each provided with a through hole having a female screw portion at a location facing the inner circumferential surface and a location facing the inner circumferential surface of the receiving portion,
Bolts that are respectively screwed into the female screw portions of the through holes;
A locking body that is separate from the cylindrical body and engages with the engaging portion and allows the relative movement of the divided members by a predetermined amount to be locked.
The bolt is characterized in that the front end side enters a recess formed in the inner peripheral surface of each of the two mouth portions.
According to this feature, the insertion portion and the receiving portion constituting the pipe joint of the existing fluid pipe have a cylindrical body made of divided members arranged at opposing positions facing each other, and the through hole The cylindrical body and the bolt are integrated and spanned over the inner peripheral surfaces of the two mouth portions via the bolts screwed into the female thread portions and the locking bodies engaged with the engaging portions of the dividing members. Therefore, it is possible to allow a predetermined amount of relative movement in the tube axis direction of both ports and prevent both the ports from unforeseen external forces such as earthquakes by using the existing seal that seals between the ports. The degree of freedom of allowing a predetermined amount of relative movement in the pipe axis direction can be maintained, and the sealing performance in the existing fluid pipe can be maintained. Further, since the bolts are screwed into the female screw portions of the through holes provided in the respective divided members, the respective divided members can be independently assembled to the inner peripheral surfaces of both the mouth portions. Furthermore, the engaging members on the inner peripheral surface side of the arranged divided members can be easily arranged without locking the divided members with each other, and the locking members that allow the divided members to move relative to each other by a predetermined amount are provided. It is easy to engage with the part.

The pipe joint movement preventing method according to claim 4 of the present invention is:
An insertion port constituting one of the existing fluid pipes;
A receiving part constituting the other existing fluid pipe into which the insertion part is inserted;
In a pipe joint provided with a seal part that seals between the two mouth parts,
A pipe joint movement preventing method that spans the inner peripheral surface of the both mouth parts, and that allows a predetermined amount of relative movement in the pipe axis direction of both mouth parts to prevent it.
A through-hole having a female screw portion having a division structure that is divided at least in the axial direction at predetermined locations separated from each other in the axial direction, including a locking portion that allows the relative movement of each other by a predetermined amount. A cylindrical body arranging step of arranging the cylindrical bodies each composed of divided members at opposing positions facing each other over the inner peripheral surfaces of the two mouth portions,
After the cylindrical body arranging step, a concave portion forming step for forming concave portions on the inner peripheral surfaces of the two mouth portions via the through holes, and
It is characterized by comprising at least a bolt screwing step for screwing a bolt into each of the female screw portions of the through hole until the tip side enters the recess after the recess forming step.
According to this feature, the insertion portion and the receiving portion constituting the pipe joint of the existing fluid pipe have a cylindrical body made of divided members arranged at opposing positions facing each other, and the through hole It is installed over the inner peripheral surface of both mouths via a bolt that is screwed into each female thread until the tip side enters the recess, thereby allowing relative movement in the tube axis direction of both mouths to a predetermined amount. Since it can be tolerated and prevented, it does not require labor, and after the cylindrical body arranging step, it is necessary to form a recessed portion on the inner peripheral surface of both mouth portions in the recessed portion forming step, and seal the existing space between both mouth portions. By the seal portion, it is possible to maintain a degree of freedom of allowing a predetermined amount of relative movement in the tube axis direction of both ports against an unexpected external force such as an earthquake, and to maintain the sealing performance in the existing fluid pipe.

  Examples of the present invention will be described below.

  Example 1 of the present invention will be described with reference to the drawings. First, FIG. 1A is an enlarged cross-sectional view showing a connection state of an insertion part and a receiving part in Example 1 of the present invention, and FIG. These are the expanded sectional views which show the state which peeled the mortar layer similarly. Fig.2 (a) is a front view of the divided cylindrical body, (b) is a left side view, and (c) is an AA cross-sectional view of (a). Fig.3 (a) is sectional drawing which shows the state which has arrange | positioned the cylindrical body in both opening parts, (b) is BB sectional drawing of (a). FIG. 4A is an enlarged cross-sectional view showing a state in which concave portions are formed in both mouth portions, and FIG. 4B is an enlarged cross-sectional view showing a state in which bolts are screwed into the concave portions. Fig.5 (a) is sectional drawing which shows the state which assembled | attached the pipe joint movement prevention tool, (b) is CC sectional drawing of (a). FIG. 6 is an enlarged cross-sectional view showing a state where both the mouth portions are relatively moved by a predetermined amount in the separating direction.

  As shown in FIG. 1 (a), the pipe joint of the existing fluid pipe in this embodiment includes an insertion port 1 constituting one of the existing fluid pipes and the other existing fluid into which the insertion port 1 is inserted. The receiving part 2 which comprises a pipe | tube, and the seal | sticker part 3 which sealed between the opposing surfaces of both the mouth parts 1 and 2 are mainly provided, and both existing fluid pipes are the same pipe axis D (refer Fig.5 (a)). ) In a substantially straight line.

  Further, the pusher wheel 4 disposed on the outer peripheral surface of the insertion part 1 is inserted into the insertion hole 4 a formed in the axial direction of the pusher wheel 4 and the insertion hole 2 c formed on the outer surface of the end part of the receiving part 2. The bolts and nuts 5 press and hold the seal portion 3 between the opposed peripheral surfaces of both the mouth portions 1 and 2.

  In addition, the existing fluid pipe | tube of a present Example is a metal water pipe, Comprising: The mortar layers 6 and 7 are provided over the internal peripheral surface of a metal base. Further, the pipe joint is provided with the above-described pipe joints at predetermined intervals in the pipe axis direction, and is a fluid pipe having a relatively large diameter so that an operator can work inside the pipe as will be described later.

  Next, a pipe joint movement prevention tool and method will be described in the order of steps.

  First, the cylindrical body arranging step will be described. As shown in FIG. 1B, the mortar layer 6 in the insertion portion 1 and the mortar layer 7 in the receiving portion 2 are peeled off along the circumferential direction, respectively. After the inner peripheral surfaces 1a and 2a are exposed and a coating material for rust prevention is applied to the exposed position of the metal substrate, a pipe joint movement preventing tool is disposed as described later.

  As shown in FIGS. 2 (a) to 2 (c), the pipe joint movement preventing device includes a cylindrical body 10 including divided members 21 and 22 that are divided into two in the axial direction, and each divided member 21. , 22 are divided into two parts in the circumferential direction, that is, each has a substantially semicircular arc shape, and has an outer diameter slightly smaller than the inner diameter of the metal base of the both mouth portions 1, 2. One split member 22 includes an inwardly protruding convex piece 22a that constitutes a locking portion, and the other split member 21 has a concave groove 21a that constitutes a locking portion that locks with the convex piece 22a. The concave groove 21a and the convex piece 22a are assembled to each other by concave-convex fitting. Further, the cylindrical body 10 includes a through hole 11 having a female screw portion 11a and a through hole 12 having a female screw portion 12a in the circumferential direction at predetermined locations where the respective divided members 21 and 22 are separated from each other in the axial direction. It is provided scattered at predetermined intervals. Further, a concave groove 10 a is formed along the circumferential direction on the outer peripheral surface of the cylindrical body 10 between the through holes 11 and 12. In addition, the division structure of the cylindrical body is not necessarily limited to the division structure divided into two in the circumferential direction, and may be, for example, a structure of three or more divisions in the circumferential direction.

  As shown in FIG. 3 (a), the exposed positions of the inner peripheral surfaces 1a and 2a of the metal substrate at both the mouth portions 1 and 2, that is, the opposing opposing faces across the inner peripheral surfaces of both the mouth portions 1 and 2 The cylindrical body 10 is disposed at the position. The through holes 11 and 12 of the cylindrical body 10 arranged at the opposed positions are opposed to the inner peripheral surface of the insertion portion 1 and the inner peripheral surface of the receiving portion 2, respectively. In addition, a sealing member 16 made of an elastic material formed in an annular shape is fitted in the concave groove 10a of the cylindrical body 10, and the inner peripheral surface of both the mouth portions 1 and 2 and the outer peripheral surface of the cylindrical body 10 It is interposed between watertight.

  The assembly of the cylindrical body 10 will be described in detail. Each substantially semicircular arc-shaped member constituting the cylindrical body 10 is conveyed into an existing fluid pipe that is a closed space. Next, in a state where the sealing member 16 is applied to the outer peripheral surface at the above-described facing position, one substantially semicircular arc-shaped member in each of the divided members 21 and 22 is disposed in the lower half peripheral portion, The other substantially semicircular arc members in each of the divided members 21 and 22 are respectively arranged. Then, as shown in FIG. 3 (b), for each divided member 21, 22, an overhang member 14 connected by a bolt 19 is installed across the ends of the substantially semicircular arc-shaped members. Further, by screwing a bolt nut 15 connected to the projecting member 14, the tubular body 10 is projected in the outer diameter direction and pressed toward the inner peripheral surfaces of the both mouth portions 1 and 2. By this pressing, the sealing member 16 is interposed in a watertight manner between the inner peripheral surface of both the mouth portions 1 and 2 and the outer peripheral surface of the cylindrical body 10. Subsequently, the end portions are connected in a ring shape via a connecting member 13 connected by a bolt 18. A predetermined amount of gap is formed in the axial direction between the outer surface of the convex piece 22 a of the dividing member 22 and the inner surface of the concave groove 21 a of the dividing member 21.

  Thus, since the sealing member 16 is provided between the inner peripheral surface of both the mouth portions 1 and 2 and the outer peripheral surface of the cylindrical body 10, the sealing member 16 and the both mouth portions 1 and 2 are provided. The existing seal portion 3 that seals the gap between the two mouth portions 1 and 2 can be double sealed.

  If a recessed part formation process is demonstrated after a cylindrical body arrangement | positioning process, as shown to Fig.4 (a), the recessed part 1b via the through-hole 11 on the inner peripheral surface 1a of the metal base | substrate of the insertion part 1, and, Recesses 2b through the through-holes 12 are formed in the inner peripheral surface 2a of the metal base of the receiving portion 2 by drills as not-shown recess forming means. The through-hole 11 is formed with a small-diameter portion 11b having a smaller diameter than the female screw portion 11a on the front side of the female screw portion 11a, that is, on the inner peripheral surface 1a side of the insertion portion 1. A small-diameter portion 12b having a smaller diameter than the female screw portion 12a is formed on the front side of the screw portion 12a, that is, on the inner peripheral surface 2a side of the receiving portion 2, and the drill is guided by these small-diameter portions 11b and 12b. Thus, the recesses 1b and 2b substantially coaxial with the through holes 11 and 12 can be formed. The recesses 1b and 2b are formed to a depth that is approximately half the thickness of the mouth portions 1 and 2. A coating for rust prevention is applied in the recesses 1b and 2b.

  If a bolt screwing process is demonstrated after a recessed part formation process, as FIG.4 (b) shows, the volt | bolt 17 which has the external thread part 17a which comprises a pipe joint movement prevention tool will be used as the internal thread part of the through-hole 11. 11a is screwed in the outer diameter direction, and the screwing is finished at a position where the tip 17b side of the bolt 17 enters the recess 1b. Similarly, the bolt 17 having the male screw portion 17a is screwed into the female screw portion 12a of the through hole 12 in the outer diameter direction, and the screwing is terminated at a position where the tip 17b side of the bolt 17 enters the recess 2b. The bolts 17 are screwed into all of the through holes 11 and 12 that are scattered along the circumferential direction of the cylindrical body 10.

  As shown in FIGS. 5 (a) and 5 (b), the insertion port 1 and the receiving port 2 constituting the pipe joint of the existing fluid pipe are arranged at opposing positions across the two ports 1 and 2. A cylindrical body 10 composed of the divided members 21 and 22, a male screw portion 17 a, a bolt 17 screwed into the female screw portion 11 a of the through hole 11 until the tip 17 b side enters the recess 1 b, and a through hole Through the bolt 17 screwed into the female screw portion 12a of the hole 12 until the tip 17b side enters the recess 2b, that is, the cylindrical body 10 and the bolts 17 and 17 are integrated to form an inner portion of both the mouth portions 1 and 2. Since it is constructed over the peripheral surface, it is possible to allow and prevent a predetermined amount of relative movement in the tube axis direction of both the mouth portions 1 and 2 with only simplified components that do not require other members. The existing seal part 3 that seals between the parts 1 and 2 resists unexpected external forces such as earthquakes. The relative movement of the tube axis direction of both the mouth portion 2 maintaining a predetermined allowable amount of freedom to be maintained sealing performance of the existing fluid conduit. In particular, the cylindrical body 10 and the bolts 17 and 17 are integrated with each other by an easy operation of drilling the recesses 1b and 2b without forming a female screw part separately in the existing fluid pipe that is a closed space. And can be constructed over the inner peripheral surfaces of both the mouth portions 1 and 2. In addition, since the bolts 17 are screwed into the female screw portions 11a and 12a of the through holes 11 and 12 provided in each of the divided members 21 and 22, respectively, each of the divided members 21 and 22 is independently connected to both ends. It can be easily assembled to the inner peripheral surfaces of the parts 1 and 2.

  In addition, the cylindrical body 10 is composed of the divided members 21 and 22 in which the insertion portion 1 and the receiving portion 2 constituting the pipe joint of the existing fluid pipe are arranged at opposing positions facing both the mouth portions 1 and 2. And a bolt 17 that is screwed into the female screw portion 11a of the through hole 11 until the tip 17b side enters the recess 1b, and a tip 17b side of the female screw portion 12a of the through hole 12 is the recess 2b. A predetermined amount of relative movement in the tube axis direction of both mouth portions 1 and 2 is allowed by being installed over the inner peripheral surfaces of both mouth portions 1 and 2 via bolts 17 that are screwed in until they enter. Therefore, both the mouth portions 1 and 2b can be formed by forming the recesses 1b and 2b on the inner peripheral surfaces of the mouth portions 1 and 2 in the recess forming step after the cylindrical body arranging step without requiring labor. , 2 against existing external forces such as earthquakes by the existing seal 3 Te, the relative movement in the tube axis direction of both the mouth portion 1 maintaining the freedom to predetermined amount permissible, can be maintained sealing performance of the existing fluid conduit.

  Further, since the cylindrical body 10 has a divided structure, the divided cylindrical body 10 is transported to an opposing position inside the existing fluid pipe, and each member of the cylindrical body 10 divided at the opposing position is transferred. Since they can be assembled with each other, it is easy to dispose the cylindrical body 10 that is the closed space at the facing position.

  Next, a description will be given of a state in which the relative movement in the direction in which both the mouth portions 1 and 2 are separated from each other due to an unexpected external force such as an earthquake occurs. As shown in FIG. When the right side surface and the right side wall of the concave groove 21a in the divided member 21 come into contact with each other and are locked to each other, the divided members 21 and 22 are locked to each other by a predetermined amount. The relative movement of both mouth portions 1 and 2 is restricted via the. In this way, the sealing member 16 maintains the seal between the inner peripheral surfaces of the two mouth portions 1 and 2 and the outer peripheral surface of the cylindrical body 10 in a state in which the divided members 21 and 22 are moved relative to each other by a predetermined amount. Therefore, the possibility of leakage due to the relative movement of the divided members 21 and 22 can be eliminated.

  In particular, since the sealing member 16 is engaged by a protruding line 10b that protrudes in the outer diameter direction and is formed in the circumferential direction in the recessed groove 10a and is restricted from moving in the axial direction, Even in the state of fixed relative movement, the sealing member 16 does not move in the axial direction, and the sealing between the inner peripheral surface over both the mouth portions 1 and 2 and the outer peripheral surface of the cylindrical body 10 is maintained.

  When relative movement occurs in the direction opposite to the above-described direction, that is, in the direction in which both the mouth portions 1 and 2 are inserted deeper, the left side surface of the convex piece 22a and the left side wall of the concave groove 21a are not particularly shown. However, the relative movement of the divided members 21 and 22 is locked by a predetermined amount, and the relative movement of both the mouth portions 1 and 2 is restricted via the cylindrical body 10. The In this way, in a state where the split members 21 and 22 are moved relative to each other by a predetermined amount, the sealing member 16 maintains the seal in the same manner as described above, so that water leaks due to the relative movement of the split members 21 and 22 with each other. Can eliminate the fear.

  In the present embodiment, the process of attaching the pipe joint movement prevention tool to the insertion portion 1 and the reception portion 2 connected in a substantially straight line has been described. However, as a modification of the present invention, the insertion portion and the reception portion are described. The mouth portions are connected to each other with an inclination of a predetermined angle, and a pipe joint movement preventing tool may be attached to the both mouth portions thus inclined and connected in the same manner as described above. By doing so, as described above, it is possible not only to maintain the sealing performance in the existing fluid pipe against an unexpected external force such as an earthquake, but also to maintain the inclination at a predetermined angle to which both the mouth portions are connected. You can also.

  Next, Example 2 of the present invention will be described below. A description of the same configuration as that of the above-described embodiment is omitted.

  Example 2 of the present invention will be described with reference to the drawings. FIG. 7 is an enlarged cross-sectional view showing a state in which the pipe joint movement preventing tool in Example 2 is assembled. As shown in the drawing, the pipe joint movement preventing device of the present embodiment includes a cylindrical body 30 composed of divided members 31 and 32 having the same divided structure as that of the above-described embodiment, and the divided members 31 and 32. Bolts 17 and 17 screwed into the female screw portions 11a and 12a of the through-holes 11 and 12, respectively, and a locking body that locks the relative movement of the divided members 31 and 32 by a predetermined amount as will be described later. The concave groove body 33 is mainly composed of.

  Each division member 31 and 32 is provided with convex-shaped pieces 31a and 32a as an engaging part which protruded in the internal diameter direction on the mutually opposing side, respectively along the circumferential direction. The concave groove body 33 is a separate body from the cylindrical body 30 composed of the divided members 31 and 32, and is an annular body formed in a substantially U shape in a sectional view opening toward the outer diameter direction. Although not shown, it has a divided structure divided into a predetermined number in the circumferential direction.

  When the assembly of the pipe joint movement preventing tool in the present embodiment is described, the split members 31 and 32 are screwed into the female screw portions 11a and 12a of the through holes 11 and 12 in the same manner as described above. Assemble along the inner peripheral surfaces of both the mouth portions 1 and 2, respectively, and then fit the groove 33 so that both the convex pieces 31a and 32a of both split members 31 and 32 are fitted, that is, the groove 33 and the convex pieces 31a and 32a are assembled along the circumferential direction so that the concave and convex portions are engaged with each other.

  Thus, the cylindrical part which consists of the division members 31 and 32 in which the insertion part 1 and the receiving part 2 which comprise the pipe joint of the existing fluid pipe | tube are arrange | positioned in the opposing position which opposes both the mouth parts 1 and 2 are opposed. The body 30, bolts 17 and 17 screwed into the female screw portions 11 a and 12 a of the through holes 11 and 12, respectively, and a concave groove body 33 that engages the convex pieces 31 a and 32 a of the divided members 31 and 32. The cylindrical body 30 and the bolts 17 and 17 are integrated and installed over the inner peripheral surfaces of the both mouth portions 1 and 2, so that only the simplified components that do not require other members are used. The relative movement in the tube axis direction of the parts 1 and 2 can be allowed and prevented by a predetermined amount, so that the existing seal part 3 that seals between the two parts 1 and 2 can be used against unforeseen external forces such as earthquakes. Maintains the degree of freedom to allow a predetermined amount of relative movement of the parts 1 and 2 in the pipe axis direction and maintains the sealing performance in the existing fluid pipe Kill. In addition, since the bolts 17 and 17 are screwed into the female screw portions 11a and 12a of the through holes 11 and 12 provided in the respective divided members 31 and 32, the respective divided members 31 and 32 are independently provided. It can assemble | attach to the internal peripheral surface of both opening parts 1 and 2. FIG. Further, the divided members 31 and 32 can be easily arranged on the inner peripheral surfaces of the two mouth portions 1 and 2 without being locked with each other, and are allowed to be locked with a predetermined amount of relative movement between the divided members 31 and 32. It is easy to engage the concave groove 33 with the convex pieces 31a and 32a of the divided members 31 and 32 arranged.

  Next, when relative movement in the direction in which both the mouth portions 1 and 2 are separated from each other due to an unexpected external force such as an earthquake occurs, the projecting pieces 31a and 32a of the split members 31 and 32 are not shown. Each of the split members 31 and 32 is locked by a predetermined amount by abutting and engaging with both side walls of the concave groove body 33, and both the mouth portions 1 and 2 are interposed via the cylindrical body 30. Relative movement is restricted. In this way, the sealing member 16 maintains the seal between the inner peripheral surfaces of the two mouth portions 1 and 2 and the outer peripheral surface of the cylindrical body 30 in a state in which the divided members 31 and 32 are moved relative to each other by a predetermined amount. Therefore, the possibility of leakage due to the relative movement of the divided members 31 and 32 can be solved. In particular, since the sealing member 16 is engaged by the protruding ridges 30b formed in the circumferential direction so as to protrude in the outer diameter direction in the concave groove 30a and the movement in the axial direction is restricted, Even in the state of fixed relative movement, the sealing member 16 does not move in the axial direction, and the sealing between the inner peripheral surface over both the mouth portions 1 and 2 and the outer peripheral surface of the cylindrical body 30 is maintained.

  When relative movement occurs in the direction opposite to the above-described direction, that is, in the direction in which both the mouth portions 1 and 2 are inserted deeper, the opposing surfaces of the two convex pieces 31a and 32a facing each other are not particularly illustrated. However, due to the contact and locking, the divided members 31 and 32 are locked to each other by a predetermined amount, and the relative movement of both the mouth portions 1 and 2 is restricted via the cylindrical body 30.

  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 embodiment, the existing fluid pipe is a metal water pipe, and a mortar layer is provided over the inner peripheral surface of the metal substrate. The material and presence / absence of the layer are not necessarily limited to the present embodiment.

  Moreover, in the said Example, each division member which comprises a cylindrical body carries out uneven | corrugated fitting by a mutual latching | locking part, or an engaging part and a latching body, and relative movement of both mouth parts is carried out. For example, each of the divided members is connected by an elastic member that can be elastically deformed in the axial direction, thereby allowing a predetermined amount of relative movement between the mouth portions. You may do it.

(A) is an expanded sectional view which shows the connection state of the insertion part and receiving part in Example 1 of this invention, (b) is an expanded sectional view which similarly shows the state which peeled the mortar layer. (A) is a front view of the divided | segmented cylindrical body, (b) is a left view similarly, (c) is AA sectional drawing of (a). (A) is sectional drawing which shows the state which has arrange | positioned the cylindrical body in both opening parts, (b) is BB sectional drawing of (a). (A) is an expanded sectional view which shows the state which formed the recessed part in both opening parts, (b) is an expanded sectional view which shows the state which screwed the volt | bolt toward the recessed part. (A) is sectional drawing which shows the state which assembled | attached the pipe joint movement prevention tool, (b) is CC sectional drawing of (a). It is an expanded sectional view showing the state where both mouth parts moved relative to the separation direction by a predetermined amount. It is an expanded sectional view showing the state where the pipe joint movement prevention tool in Example 2 was assembled.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insertion part 1b Recessed part 2 Receiving part 2b Recessed part 3 Sealing part 10 Cylindrical body 10a Recessed groove 10b Protrusion 11, 12, Through-hole 11a, 12a Female thread part 16 Sealing member 17 Bolts 21, 22 Dividing member 21a Recessed groove ( Locking part)
22a Convex piece (locking part)
30 Tubular bodies 31, 32 Split members 31a, 32a Convex piece (engagement part)
33 Concave groove (locking body)

Claims (4)

An insertion port constituting one of the existing fluid pipes;
A receiving part constituting the other existing fluid pipe into which the insertion part is inserted;
In a pipe joint provided with a seal part that seals between the two mouth parts,
A pipe joint movement preventing device that is constructed over the inner peripheral surface of the both mouth parts, and that allows a predetermined amount of relative movement in the tube axis direction of both mouth parts to prevent it.
A locking portion that is arranged at opposing positions facing each other over the inner peripheral surfaces of the two mouth portions, has a divided structure that is divided at least in the axial direction, and allows a relative amount of mutual movement to be locked. A cylindrical shape composed of divided members each provided with a through hole having a female screw portion at a position facing the inner peripheral surface of the insertion portion and a position facing the inner peripheral surface of the receiving portion at the facing position. Body,
A bolt that is screwed into the female thread portion of the through-hole, respectively,
The bolt joint movement preventing tool, wherein the bolt is inserted into a recess formed on the inner peripheral surface of each of the two mouth portions.   A sealing member is provided on the outer peripheral surface of the cylindrical body, and the sealing member is configured so that an inner peripheral surface of the two mouth portions and an outer peripheral surface of the cylindrical body are in a state in which the divided members are moved relative to each other by a predetermined amount. The pipe joint movement preventing device according to claim 1, wherein a seal between the two is maintained. An insertion port constituting one of the existing fluid pipes;
A receiving part constituting the other existing fluid pipe into which the insertion part is inserted;
In a pipe joint provided with a seal part that seals between the two mouth parts,
A pipe joint movement preventing device that is constructed over the inner peripheral surface of the both mouth parts, and that allows a predetermined amount of relative movement in the tube axis direction of both mouth parts to prevent it.
Arranged at opposing positions across the inner peripheral surface of the two mouth portions, and having a divided structure divided at least in the axial direction, provided with an engaging portion on the inner surface side, A cylindrical body composed of divided members each provided with a through hole having a female screw portion at a location facing the inner circumferential surface and a location facing the inner circumferential surface of the receiving portion,
Bolts that are respectively screwed into the female screw portions of the through holes;
A locking body that is separate from the cylindrical body and engages with the engaging portion and allows the relative movement of the divided members by a predetermined amount to be locked.
The bolt joint movement preventing tool, wherein the bolt is inserted into a recess formed on the inner peripheral surface of each of the two mouth portions. An insertion port constituting one of the existing fluid pipes;
A receiving part constituting the other existing fluid pipe into which the insertion part is inserted;
In a pipe joint provided with a seal part that seals between the two mouth parts,
A pipe joint movement preventing method that spans the inner peripheral surface of the both mouth parts, and that allows a predetermined amount of relative movement in the pipe axis direction of both mouth parts to prevent it.
A through-hole having a female screw portion having a division structure that is divided at least in the axial direction at predetermined locations separated from each other in the axial direction, including a locking portion that allows the relative movement of each other by a predetermined amount. A cylindrical body arranging step of arranging the cylindrical bodies each composed of divided members at opposing positions facing each other over the inner peripheral surfaces of the two mouth portions,
After the cylindrical body arranging step, a concave portion forming step for forming concave portions on the inner peripheral surfaces of the two mouth portions via the through holes, and
After the recess formation step, a pipe joint comprising at least a bolt screwing step of screwing a bolt into each of the female screw portions of the through-hole until the tip side enters the recess. Movement prevention method.

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