JPH1163328A - Earthquake resistant detachment preventing collar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a collar usable at a part requiring integration against water pressure and expandable for large force caused by an earthquake acts. SOLUTION: An earthquake resistant detachment preventing collar has a detachment preventing claw 19 arranged in a pressure ring 12 for compressing sealing material 15 between a socket 3 and spigots 4, 5, a push bolt 22 screwed into the pressure ring 12 so as to press the detachment preventing claw 19 to the outer peripheries of the spigots 4, 5, and a lock ring 9 arranged at the inner periphery of the socket 3 in a position spaced onto the opening end side from a protruding parts 24 formed at the outer periphery of the spigots 4, 5, so as to be engaged with the protruding parts 24. The detachment preventing claw 19 is pressed to the outer periphery of the spigot by the push bolt so as to withstand slip-out force caused by water pressure in a pipe. The lock ring 9 prevents detachment of a joint being engaged with the protruding part 24 of the spigot when the joint is extended due to the generation of slip-out force exceeding the detachment preventing force of the detachment preventing claw 19 at the time of occurrence of an earthquake.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-separation type connecting ring used in a pipeline.

[0002]

2. Description of the Related Art Concrete pipes are provided with concrete protection so as to prevent the pipe from moving due to the non-average force in a deformed pipe section such as a curved pipe section where an average force due to water pressure acts. I have. In addition, in order to eliminate concrete protection that requires a large-scale construction work, a detachable pipe joint is used for a deformed pipe section. It is necessary to use a pipe joint which does not expand or contract as the detachment preventing pipe joint in the deformed pipe section, thereby integrating the pipe line and preventing its movement.

On the other hand, when laying a pipe, it is necessary to perform a so-called knotting pipe in which a pair of pipe ends are joined at any position in the pipe. For this knotting pipe, using a connecting ring constituted by a pipe body having receiving ports formed at both ends, a connecting ring fitted to one pipe end is moved toward the other pipe end. By fitting the other end of the tube to the outside, the ends of the two tubes are joined to each other to form a knotted pipe. In general, this connecting ring allows expansion and contraction and bending at joints at both ends.

[0004]

In an urban area where buried objects are congested, a knotted pipe is often formed at a deformed pipe for the convenience of construction. However, as described above, a general connecting ring expands and contracts and bends, so that it cannot be used for knotting piping in a deformed pipe portion.

[0005] Further, in a congested pipeline network, integration is made everywhere, and there is no room for the pipeline to absorb ground displacement when an earthquake occurs. In view of the above, the present invention has been made to solve the above problems and to provide a connecting ring which can be used in a necessary portion where integration with water pressure is necessary and which can expand and contract when a large force due to an earthquake acts. Aim.

[0006]

SUMMARY OF THE INVENTION To achieve this object, the present invention is directed to a socket formed at one end and the other end of a tube, and to the above-mentioned socket and another pipe inserted into the socket. A pressing ring for compressing the seal material between the insertion hole, a separation preventing claw disposed inside the pressing ring, and a push for pressing the separation preventing claw against the outer periphery of the insertion hole by being screwed into the pressing ring. The bolt and the projection formed on the outer periphery of the insertion port inserted into the reception port are engaged with the projection at the opening end side of the reception port at a distance from this projection to the inside of the reception port. A lock ring disposed around the circumference, wherein the detachment preventing claw is pressed against the outer periphery of the insertion hole by a push bolt so as to withstand a pull-out force due to water pressure in the pipe, and the lock ring is configured to prevent the occurrence of an earthquake. Sometimes the release force exceeds the release prevention force of the release prevention claw Is obtained as is possible to prevent the disengagement by each other it takes a projection of the spigot when the fitting is extended form.

[0007] Therefore, the connecting ring of the present invention is pressed against the outer periphery of the insertion port so that the separation preventing claw withstands the withdrawal force due to the water pressure in the pipe. Is suitably used where necessary. Further, when a large force exceeding the detachment preventing force generated by the detachment preventing claw is generated at the time of the earthquake, the joint can expand and contract within a range until the projection of the insertion hole engages with the lock ring. Finally, the engagement between the lock ring and the projecting portion exerts the detachment prevention performance for obtaining the required earthquake resistance.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a connecting ring according to the present invention, which has a structure in which receiving ports 3 are formed at both ends of a pipe body 2 made of cast iron. Inserts 4 and 5 of other pipes are inserted into the respective receiving ports 3 and 3. These insertion openings 4 and 5 are formed at the tip of a deformed tube or the like.

On the inner periphery of the opening end of each receiving port 3, a tapered sealing material pressure contact surface 6 which is tapered toward the back is formed. A flange 7 is formed on the outer periphery of the opening end of each receiving port 3. An annular projection 8 is formed on the inner periphery of the receiving port 3 on the back side of the sealing material pressure contact surface 6, and the inner periphery of the receiving port 3 on the back side of the annular projection 8 is provided in a circumferential direction. A lock ring accommodating groove 10 for accommodating a single annular lock ring 9 is formed in the groove. A rubber link 1 is provided on the outer periphery of the lock ring 9 for holding the lock ring 9 in a centered state when the insertion openings 4 and 5 are inserted into the receiving openings 3 and 3.
1 is provided.

Press rings 12, 12 are fitted on the outer periphery of the insertion ports 4, 5 outside the receiving ports 3, 3, respectively. As shown in FIG. 2, the press rings 12, 12 are fastened to the flange 7 of the receiving port 3 by a plurality of T-head bolts 13 and nuts 14 arranged in a pipe axis direction along the circumferential direction. Mouth 3
The annular rubber sealing member 15 is compressed between the press-contact surface 6 of FIG. 1 and the outer peripheral surfaces of the insertion openings 4 and 5 so that a required sealing function can be exhibited. Between the seal member 15 and the annular projection 8 of the receiving port 3, a backup ring 16 is provided in the circumferential direction for backing up the seal member 15 which is subjected to compression.

As shown in FIGS. 1 and 2, a plurality of circumferential grooves 18 are formed in the pressing wheel 12 at a plurality of positions in the circumferential direction. Each groove 18 has a circumferential dimension larger than the groove 18. Is accommodated therein. The separation preventing claw 19 has an outer surface 2 parallel to the tube axis direction on its outside.
0 and a claw portion 21 in the circumferential direction of the tube inside thereof. A push bolt 22 is screwed into the press wheel 12 toward each groove 18 in a penetrating state.
By pressing the outer surface 20, the claw portion 21 can be pressed so as to bite into the outer peripheral surfaces of the insertion openings 4, 5.

As shown in FIG. 2, the pressing wheel 12 is divided into two in the circumferential direction. Reference numerals 25, 25 denote divided portions, which are configured such that the T-head bolts 13 are passed through after the constituent members of the press wheel 12 are overlapped. FIG. 2B is a view as viewed in the direction of the arrow B in FIG. 2A, and FIG. 2C is a view as viewed in the direction of the arrow C in FIG.

A projection 24 is formed on the outer periphery of the distal end of each of the insertion openings 4 and 5. When the receptacle 3 and the insertion ports 4 and 5 are joined to each other, the projection 24
It is configured so as to be located at a distance behind the socket 3 with a distance.

When the sockets 3 and 3 of the connecting ring 1 having such a configuration are joined to the insertion ports 4 and 5 of the other pipes, a sealing material 15 and a backup ring are provided on the outer circumference of the insertion ports 4 and 5 in advance. 1
6 and outside fit. The rubber ring 11 and the lock ring 9 are housed in the lock ring housing groove 10 of the socket 3. Then, in this state, the insertion ports 4, 5 are inserted into the reception ports 3, 3,
Insert inside. Then, the projections 24 of the insertion openings 4 and 5 are
While pushing open the lock ring 9 held in a centered state by the rubber ring 11, the lock ring 9 passes through the position of the lock ring 9, and enters the back side of the receiving port 3.

Next, the pressing wheel 12 accommodating the separation preventing claw 19 in the groove 18 is put over the insertion openings 4 and 5, and fastened to the flange 7 of the receiving opening 3 by the T-head bolt 13. Then, the sealing material 15 is compressed by the pressing wheel 12. Pressing wheel 1
By screwing a push bolt 22 into 2, the claw portions 21 of the respective separation preventing claws 19 are pressed so as to bite into the outer peripheral surfaces of the insertion openings 4 and 5.

By doing so, the detachment preventing claws 19 are pressed against the outer circumferences of the insertion openings 4 and 5 so as to withstand the removal force due to the water pressure in the pipe. For this reason, the connecting ring 1 can be suitably used in a portion where integration with water pressure is required, such as a joint portion with the deformed pipe portion.

When a large force exceeding the detachment preventing force by the detachment preventing claws 19 is generated at the time of the earthquake, the insertion slot 4,
The joint can be extended in a range until the projection 24 of the fifth member engages with the lock ring 9. Finally, the lock ring 9 and the projection 24 are engaged with each other, so that separation prevention performance for obtaining required earthquake resistance is exhibited. FIG. 3 is a graph showing the relationship between the exit force acting on the joint and the amount of joint elongation.

Therefore, according to the present invention, a so-called knotted pipe in a state where the joint is integrated by using the connecting ring 1 becomes possible, and the restriction on the construction can be largely eliminated. Moreover, with the potential expansion and contraction function, the socket 3,
3 and the insertion holes 4 and 5 can be fixed to each other at an arbitrary position.

In the congested pipeline, as described above, there are many integrated parts, and it is difficult to absorb the displacement of the ground due to the earthquake due to the expansion and contraction of the pipeline. By using the pipes, the pipes can be integrated in a normal state, and a telescopic portion can be created in the event of an earthquake, so that a seismic pipe network can be configured.

As described above, a plurality of the claws 19 are provided in the circumferential direction, and in FIG. 2, four claws 19 are arranged in the circumferential direction as clearly shown in FIG. Is illustrated. The claw 19 may be, for example, one having a relatively long shape as shown in FIG. 5 and two arranged in the circumferential direction. 5 can be pressed evenly.

In the above description, the example in which the separation preventing claws 19 are accommodated in the grooves 18 formed at a plurality of positions in the circumferential direction, respectively, has been described. Can be accommodated in an annular groove formed continuously. In this case, as shown by phantom lines in FIGS. 4 and 5, the separation preventing rubber 23 is interposed between the adjacent separation preventing claws 19 in a compressed state, so as to be used at the time of pipe joining or the like. These detachment preventing claws 19 can be reliably held in the groove.

The cross-sectional shape of the detachment preventing claw 19 can be appropriately determined in consideration of its strength, penetration into the insertion openings 4 and 5, and the like. FIG. 6 shows an example of the cross-sectional shape of the nail 19. FIG. 6 (a) has almost the same shape as that shown in FIG. FIG. 2B illustrates a claw 19 having a rectangular cross section having claw portions 21 at both ends, and FIG.
1 is exemplified.

FIGS. 7 to 9 exemplify a case where the seismic-resistant type separation-preventing connecting ring of the present invention is used as a drop-in connection pipe within a range where integration is performed. That is, FIG.
As shown in (a), in a place where the ends of a pair of pipes 27, 28 constituting a pipe already laid face each other at a distance from each other, these pipes 27, 28
It is assumed that an insertion port 29 is formed at an end of the. At this time, first, the respective seizures 29, 29 are covered with the seismic-type anti-separation connecting rings 1, 1 of the present invention.
A new pipe 31 having openings 30 formed at both ends is dropped by cutting the pipe to a length corresponding to the distance between the pipes 27 and 28 between the pipes 7 and 28. Next, FIG.
As shown in (b), the connecting rings 1 and 1 are displaced in the tube axis direction, and one end of each is put on the insertion openings 30 and 30 of the new pipe 31. Finally, the pressing wheel 12 and the sealing material 15 are set. By doing so, it can be used for a tie pipe by dropping in a range where the integration is performed.

FIG. 8 illustrates a case where a new pipe 31 is dropped between the receiving port 32 and the insertion port 29 in the existing pipeline. The new tube 31 has openings 30 formed at both ends thereof by cut tubes or the like, as in the case of FIG. In this case, new tube 3
1 is inserted into the existing receptacle 32 after the new pipe 31 is dropped. Further, the other insertion port 30 is thereafter joined to the existing insertion port 29 via the connecting ring 1 of the present invention. The existing insertion opening 29 and the new pipe 31
It is integrated by the connecting ring 1 of the present invention. In addition, new pipe 31
An insertion ring 33 is interposed between the other insertion port 30 and the rear end of the reception port 32, thereby integrating the reception port 32 and the insertion port 30.

FIG. 9 is a view showing the openings 29, 2 in the existing pipeline.
A case where the new pipe 31 is dropped between the nine pipes will be exemplified. The new tube 31 is inserted into one end of the insertion tube 30 by a cut tube or the like.
Is formed, and a receiving port 34 is formed at the other end. In this case, after the new pipe 31 is dropped, the receiving port 34 is covered with one of the existing insertion ports 29, and the two are integrated by the insertion ring 33. Further, the insertion port 30 of the new pipe 31 and the other existing insertion port 29 are connected to the connecting ring 1 of the present invention.
Integrated.

[0026]

As described above, according to the present invention, the separation preventing claw disposed inside the pressing wheel is pressed against the outer periphery of the insertion hole so as to withstand the removal force due to the water pressure in the pipe, and the lock ring is subjected to the earthquake. When the joint expands due to the release force that exceeds the release prevention force of the release prevention claw at the time of occurrence, it can engage with the projection of the insertion hole and prevent its detachment, so the joint with the deformed pipe part In addition to being able to be used suitably in places where integration with water pressure is necessary, in the event of an earthquake, the joint can be expanded and contracted until the projection of the insertion hole engages with the lock ring, and finally the lock By engaging the ring and the projection, it is possible to exhibit the detachment prevention performance for obtaining the required earthquake resistance.

For this reason, a so-called knotted pipe in a state where the joint is integrated using the connecting ring of the present invention becomes possible, and the restriction on the construction can be largely eliminated. In addition, the receiving port and the insertion port can be fixed to each other at an arbitrary position in a state having a potential expansion / contraction function.

In addition, in a congested pipeline, there are many integrated portions, and it is difficult to absorb the displacement of the ground due to an earthquake due to expansion and contraction of the pipeline. Thereby, the pipeline can be integrated in normal times, and a telescopic portion can be created in the event of an earthquake, so that a seismic pipeline network can be configured.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a connecting ring according to an embodiment of the present invention.

FIG. 2 is a diagram showing a pressing wheel in FIG.

FIG. 3 is a diagram showing a relationship between a pull-out force acting on a joint of the connecting ring of FIG. 1 and a joint elongation amount.

FIG. 4 is a diagram showing an example of an arrangement of separation prevention claws.

FIG. 5 is a diagram showing another example of the arrangement of the separation preventing claws.

FIG. 6 is a view showing a cross-sectional shape of a separation preventing claw.

FIG. 7 is a diagram showing an example in which the seismic-resistant type separation-prevention connecting ring of the present invention is used for a knotting pipe by dropping in a range where integration is performed.

FIG. 8 is a view showing another example in which the seismic-resistant disengagement prevention connecting ring of the present invention is used for a knotting pipe by dropping in a range where integration is performed.

FIG. 9 is a view showing still another example in which the seismic-resistant disengagement prevention connecting ring of the present invention is used for a knotting pipe by dropping in a range where integration is performed.

[Explanation of symbols]

 2 Tube 3 Reception port 4 Insertion port 5 Insertion port 9 Lock ring 12 Press ring 15 Sealing material 19 Detachment preventing claw 22 Push bolt 24 Projection

Claims (1)

[Claims] 1. A press ring for compressing a sealing material between a receiving port formed at one end and the other end of a pipe body and an insertion port of another pipe inserted into the receiving port. A claw for preventing disengagement arranged inside the press ring, a push bolt for screwing the claw for prevention of disengagement into the outer periphery of the insertion hole by being screwed into the press ring, and a claw inserted into the receptacle. A lock ring disposed on the inner periphery of the receptacle at a position spaced from the projection to the opening end side of the receptacle so as to engage with the projection formed on the outer periphery; The prevention claw is pressed against the outer periphery of the insertion hole by a push bolt so as to withstand the removal force due to the water pressure in the pipe, and the lock ring generates a removal force that exceeds the separation prevention force of the separation prevention claw when an earthquake occurs. Engages with the projection of the opening when the joint is extended A seismic-resistant disengagement prevention connecting ring, characterized in that it can be prevented from being disengaged.