JP2015102124A - Conduit connection device and conduit connection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize displacement absorption amount originally included in a flexible pipe as countermeasures for ground subsidence and earthquake.SOLUTION: A conduit connection device is provided which includes a first flexible pipe 11 and the second flexible pipe 21, and a connecting pipe 31 for connecting the first flexible pipe 11 with the second flexible pipe 21. At least one of the first flexible pipe 11 and the second flexible pipe 21 includes sleeve pipes 14, 24 having convex spherical parts 13, 23 at one end, and sheathing pipes 16, 26 having concave spherical parts 15, 25 slidably supporting the convex spherical parts 13, 23. A pipe axis of the first flexible pipe 11 and a pipe axis of the second flexible pipe 21 are deviated from each other, and the connecting pipe 31 connects the first flexible pipe 11 with the second flexible pipe 21 while a pipe axis of the connecting pipe 31 is inclined in respect to the pipe axes of the first and second flexible pipes 11, 21.

Description

  The present invention relates to a conduit connecting apparatus and a conduit connecting method for connecting a first conduit and a second conduit that are located at different positions.

  In recent years, in various pipes, for example, water pipes, telescopic flexible pipes have been used as countermeasures against earthquakes and ground subsidence. However, in the old facilities, the expansion / contraction flexible tube is not used, and in many facilities, water leakage occurs due to the bending of the piping due to the ground subsidence. Similarly, even in facilities where telescopic flexible tubes are used, there are increasing examples of ground subsidence exceeding the rated performance of telescopic flexible tubes and leading to water leakage. For this reason, the work which replaces the expansion-contraction flexible pipe which absorbed the ground subsidence exceeding the rated performance now with a new expansion-contraction flexible pipe from the viewpoint of improving the seismic performance of piping is increasing. The present patent applicant has filed the following patent application, for example, as an elastic flexible tube that can be used for earthquake resistance.

  Conventional telescopic flexible tubes are premised on straight piping. Therefore, when using an expansion / contraction flexible pipe with respect to an already curved pipe, the original displacement absorption amount is consumed, that is, between the ends of existing water pipes having different positions by bending the expansion / contraction flexible pipe. To connect. For example, when the ground has caused unequal subsidence of 100 mm, for example, an expansion / contraction flexible tube having a performance limit of 200 mm is used and is displaced by 100 mm already subsidized. Therefore, the remaining displaceable ability of the used telescopic flexible tube becomes the remaining 100 mm. Therefore, originally, an elastic flexible tube having a performance limit of 100 mm may be used, but here, an elastic flexible tube having a performance limit of 200 mm must be used. The expansion / contraction flexible tube that can absorb a large displacement has a long product overall length and exceeds the existing piping length or the length of the existing expansion / contraction flexible tube. The piping will also have to be moved. For this reason, construction becomes large, construction days increase, and construction costs increase. The use of the conventional telescopic flexible tube has the above problems.

JP 2011-052764 A

  The present invention has been proposed in view of such conventional circumstances, and all of the displacement absorption inherent in the flexible tube can be used for new ground subsidence and earthquake countermeasures. It is an object of the present invention to provide a conduit connecting device and a conduit connecting method capable of greatly reducing the above.

  In order to achieve the above-described object, a conduit connection device according to the present invention includes a first flexible tube, a second flexible tube, the first flexible tube, and the second flexible tube. A connecting tube to be connected, and at least one of the first flexible tube and the second flexible tube is slidable on a sleeve tube having a convex spherical portion at one end, and the convex spherical portion And a tube axis of the first flexible tube is misaligned with a tube axis of the second flexible tube, and the connection tube is connected to the connection tube. The first flexible tube and the second flexible tube are connected in a state where the tube shaft is inclined with respect to the tube axes of the first and second flexible tubes.

  Furthermore, an end tube is provided at each end of the sleeve tube of the first flexible tube and the sleeve tube of the second flexible tube, and the end portion of the end tube to be connected, the connection tube Both of the end portions may have corresponding oblique end surfaces, and the oblique end surface of the end tube may be connected to the oblique end surface of the connection tube.

  Furthermore, an end tube connected to the connection tube is provided at each end of the sleeve tube of the first flexible tube and the sleeve tube of the second flexible tube, and the end tube or the connection The tube may be provided in a smooth curved shape.

  Furthermore, the first flexible tube is connected to a first conduit in a first position, and the second flexible tube is in a second position that is shifted from the first position. You may make it connect with the conduit | pipe.

  Furthermore, the connecting pipe may be provided so as to be extendable and contractible in the pipe axis direction.

  Furthermore, the connection pipe includes a first connection pipe connected to one of the first flexible pipe and the second flexible pipe, and a second connection pipe connected to the other. And the second connecting pipe is inserted into the first connecting pipe, and the second connecting pipe is slidable in the pipe axis direction with respect to the first connecting pipe. May be.

  Further, at least one of the first flexible tube and the second flexible tube may be a telescopic flexible tube having flexibility and stretchability.

  The conduit connection method according to the present invention is the conduit connection method for connecting the first conduit in the first position and the second conduit in the second position shifted from the first position. A first flexible tube, a second flexible tube, and a connection tube connecting the first flexible tube and the second flexible tube, the first flexible tube and the second flexible tube. At least one of the flexible tubes has a sleeve tube having a convex spherical portion at one end, and an outer tube having a concave spherical portion that slidably supports the convex spherical portion, and the first tube The tube axis of the flexible tube is misaligned with the tube axis of the second flexible tube, and the connection tube has a tube axis of the connection tube with respect to the tube axes of the first and second flexible tubes. A conduit connection device that connects the first flexible tube and the second flexible tube in a tilted state between the first conduit and the second conduit; Above Connect the flexible tube to the first conduit, connecting the second flexible tube into the second conduit.

  The conduit connection device according to the present invention includes one flexible tube and a connection tube that connects the one flexible tube and another flexible tube, and the one flexible tube has one end portion. A sleeve tube having a convex spherical portion and an outer tube having a concave spherical portion that slidably supports the convex spherical portion, and the connecting tube has a tube axis of the connecting tube The flexible tube is connected to the one flexible tube while being inclined with respect to the tube axis of the flexible tube, and the other end of the connection tube is connected to the other flexible tube.

  Furthermore, the sleeve tube of the one flexible tube may be provided with an end tube, and the oblique end surface of the end tube may be connected to the oblique end surface of the connection tube.

  Furthermore, the sleeve tube of the one flexible tube may be provided with an end tube, and the end tube or the connection tube may be provided in a smooth curved shape.

  The one flexible tube is connected to a first conduit in a first position, and the other end of the connection tube is a second conduit in a second position shifted from the first position. You may make it connect with the said other flexible tube connected.

  Furthermore, the connecting pipe may be provided so as to be extendable and contractible in the pipe axis direction.

  Further, the connection pipe has a first connection pipe connected to one of the one flexible pipe and the other flexible pipe, and a second connection pipe connected to the other. The second connection pipe may be inserted into the first connection pipe, and the second connection pipe may be slidable in the tube axis direction with respect to the first connection pipe. good.

  According to the present invention, it is not necessary to displace the flexible tube in advance by connecting the first flexible tube and the second flexible tube via the oblique connection tube. Therefore, all of the amount of displacement that the flexible tube originally has can be used for new ground subsidence and earthquake countermeasures. In addition, the product length of the conduit connection device can be shortened.

It is the side view which showed the use condition of the conduit connection apparatus to which this invention is applied. It is sectional drawing of the conduit connection apparatus to which this invention is applied. It is the side view which showed the relationship between the end tube of a 1st flexible tube, a connection tube, and the end tube of a 2nd flexible tube. It is the side view which showed the modification which provided the expansion-contraction flexible tube in the middle part of the connection pipe. (A) is the side view which showed the example which used the straight pipe for the connection pipe, (B) is the side view which showed the example which used the vent pipe for the connection pipe, (C) A modification in which a bent pipe is used as an end pipe of the first flexible pipe and the second flexible pipe, and the first flexible pipe and the second flexible pipe are connected to each other at an inclined connecting pipe portion. It is the side view shown, (D) is the side view which showed the modification which used S type vent pipe, (E) is an inclined part using a vent pipe for the end pipe of each flexible pipe. It is the side view which showed the example joined. (A) is the side view which showed the modification which connected the expansion-contraction flexible pipe of a different diameter with a connection pipe, (B) is a modification of FIG.5 (C) and FIG.5 (E), It is the side view which showed the modification which connected the vent pipes by the straight pipe, (C) is the side view which showed the modification of FIG.5 (D) using the S type | mold vent pipe. It is the side view which showed the end pipe manufactured by curving the end part side in the shape of a smooth curve. It is the side view which showed the connecting pipe manufactured by curving the end pipe side in the smooth curve shape. It is the side view which showed the end pipe | tube and connection pipe which were curving in the smooth curve shape and were manufactured integrally.

  Hereinafter, a conduit connection device to which the present invention is applied will be described with reference to the drawings.

<Outline of conduit connection device>
As shown in FIG. 1, a conduit connection device 10 to which the present invention is applied connects between a first conduit 1 and a second conduit 2 in which a height difference or a horizontal shift has occurred due to ground subsidence or the like. For example, the 1st conduit | pipe 1 is provided in the foundation 3 of structures, such as a pump station and a bridge provided in the middle of the pipeline of a waterworks. The foundation 3 of such an existing structure is generally firmly provided, has little land subsidence, and is in the first position. On the other hand, the 2nd conduit | pipe 2 is embed | buried under the road etc. 4 and sinks by ground subsidence. That is, unequal subsidence occurs and the second position is shifted from the first position, and a height difference or a horizontal shift occurs between the first conduit 1 and the second conduit 2. ing. The conduit connection device 10 is arranged in place of the conduit between the end of the first conduit 1 and the end of the second conduit 2.

  The conduits 1 and 2 here are water pipes, and metal pipes such as steel pipes and cast iron pipes, synthetic resin pipes made of vinyl chloride, and the like are used.

<Description of configuration of conduit connection device>
As shown in FIGS. 1 and 2, the conduit connection device 10 includes a first flexible tube 11 and a second flexible tube 21 that are movable parts, and a first flexible tube 11 and a second flexible tube. A connecting pipe 31 for connecting the flexible pipe 21 is provided.

<Description of the first flexible tube>
As shown in FIGS. 1 and 2, the first flexible tube 11 is made of, for example, ductile cast iron, and includes a first sleeve tube 14 having a first convex spherical portion 13 at one end portion of the end tube 12. , And a first outer tube 16 having a first concave spherical portion 15 that receives the first convex spherical portion 13.

  The first outer tube 16 includes two members, a front member 16a and a rear member 16b. The first conduit 1 is joined to the front member 16a via a flange portion 17 formed on one end side. Further, the first outer tube 16 has a front member 16a and a rear member 16a in a state where the front convex member 16a and the rear member 16b are combined and the first convex spherical member 13 is accommodated in the first concave spherical member 15. By connecting the member 16b with a fastening member 18 such as a bolt and a nut or a known connection method such as welding, the first concave spherical surface portion 15 covers the ball-like first convex spherical surface portion 13 or more. The first sleeve tube 14 is prevented from falling off. Further, a gap between the first convex spherical portion 13 and the first concave spherical portion 15 is sealed with a rubber packing 19.

  Therefore, the first flexible tube 11 can be rotated and bent as the first convex spherical surface portion 13 slides with respect to the first concave spherical surface portion 15.

<Description of the second flexible tube>
As shown in FIGS. 1 and 2, the second flexible tube 21 is made of, for example, ductile cast iron, and a second sleeve tube 24 having a second convex spherical portion 23 at the other end of the end tube 22. And a second outer tube 26 having a second concave spherical portion 25 that receives the second convex spherical portion 23.

  The second outer tube 26 includes two members, a front member 26a and a rear member 26b. The 2nd conduit | pipe 2 is joined to the front member 26a via the flange part 27 formed in the other end side. Further, the second outer tube 26 is configured such that the front member 26a and the rear member 26b are combined with the front member 26a and the rear member 26 in a state where the second convex spherical member 23 is accommodated in the second concave spherical member 25. By connecting the member 26b with a fastening member 28 such as a bolt and a nut or a known connection method such as welding, the second concave spherical surface portion 25 covers the ball-shaped second convex spherical surface portion 23 or more. The second sleeve tube 24 is prevented from falling off. Further, a gap between the second convex spherical portion 23 and the second concave spherical portion 25 is sealed with a rubber packing 29.

  Therefore, the second flexible tube 21 can be rotated and bent as the second convex spherical portion 23 slides with respect to the second concave spherical portion 25.

<Description of connecting pipe>
Between the first flexible tube 11 and the second flexible tube 21, a connection tube 31 is disposed as shown in FIGS. The connection tube 31 is connected between the end tube 12 of the first flexible tube 11 and the end tube 22 of the second flexible tube 21, and has an inner diameter substantially equal to the inner diameter of the end tubes 12 and 22. It is a straight pipe having

  Further, the connection pipe 31 is, for example, a first connection pipe 32 connected to the end pipe 12 of the first flexible pipe 11 and a second connection connected to the end pipe 22 of the second flexible pipe 21. And a connecting pipe 33. The first connecting pipe 32 has a large diameter, the second connecting pipe 33 has a small diameter, and the second connecting pipe 33 can be inserted into the first connecting pipe 32. Furthermore, a first engagement protrusion 34 is formed on the inner peripheral surface of the large-diameter first connection pipe 32, and a second engagement protrusion 35 is formed on the outer peripheral surface of the small-diameter second connection pipe 33. Is formed. The small-diameter second connection pipe 33 includes a second engagement protrusion 35 formed on the outer peripheral surface and a first engagement protrusion 34 formed on the inner peripheral surface of the large-diameter first connection pipe 32. By engaging, it is configured not to enter the inside of the large-diameter first connection pipe 32 more than necessary. Further, a gap between the first connection pipe 32 and the second connection pipe 33 is sealed with a rubber packing 36.

  Therefore, the conduit connecting device 10 can expand and contract by the second connecting tube 33 sliding linearly with respect to the first connecting tube 32. In other words, the conduit connecting device 10 can be rotated and bent by sliding the first and second convex spherical portions 13 and 23 with respect to the first and second concave spherical portions 15 and 25. The second connection pipe 33 can be expanded and contracted by sliding linearly with respect to the first connection pipe 32.

  Furthermore, both the first flexible tube 11 and the second flexible tube 21 described above are connected to the first convex spherical surface portion 13 of the first flexible tube 11 as shown in FIGS. The portion with the first concave spherical portion 15 is not curved, the portion with the second convex spherical portion 23 and the second concave spherical portion 25 of the second flexible tube 21 is not curved, and the tube axis P1. , P3 are straight and substantially horizontal. The connecting pipe 31 fills up a vertical deviation or a horizontal deviation such as a height difference generated between the first flexible pipe 11 and the second flexible pipe 21. For this reason, the connection pipe 31 is disposed obliquely between the first flexible pipe 11 and the second flexible pipe 21 with respect to the tube axes P1 and P3 of the respective flexible pipes 11 and 21. The

  Therefore, the end portion of the end tube 12 of the first flexible tube 11 and the end portion of the first connecting tube 32 on the end tube 12 side are aligned with the inclination of the first connecting tube 32 as shown in FIG. Processed diagonally. Specifically, the diameter of the end portion of the end tube 12 and the diameter of the end portion on the end tube 12 side of the first connection tube 32 are the same. The end tube 12 is processed at an angle a1 with respect to the tube axis P1, and the end of the first connecting tube 32 is processed at an angle b1 with respect to the tube axis P2 (a1 = b1). ). That is, the opening end (end surface) of the end portion of the end tube 12 and the end portion of the first connection tube 32 is formed to be elliptical. Then, the end portion of the end pipe 12 and the end portion of the first connection pipe 32 are joined by welding or the like. As a result, the first flexible tube 11 and the first connection tube 32 are connected to be inclined with respect to the tube axis of the first flexible tube 11.

  The end portion of the end tube 22 of the second flexible tube 21 and the end portion of the second connection tube 33 on the end tube 22 side are also processed obliquely in accordance with the inclination of the second connection tube 33. . Specifically, the diameter of the end portion of the end tube 22 and the end portion of the second connection tube 33 on the end tube 22 side are the same. The end tube 22 is processed at an angle a2 with respect to the tube axis P3, and the end of the second connection tube 33 is processed at an angle b2 with respect to the tube axis P2 (a2 = b2). ). That is, the opening end (end surface) of the end portion of the end tube 22 and the end portion of the second connection tube 33 is formed to be elliptical. Then, the end portion of the end pipe 22 and the end portion of the second connection pipe 33 are joined by welding or the like. Accordingly, the second flexible tube 21 and the second connection tube 33 are connected to be inclined with respect to the tube axis of the second flexible tube 21.

  The connection pipe 31 has a first connection pipe 32 connected to the end pipe 12 of the first flexible pipe 11 and a second connection pipe 33 connected to the end pipe 22 of the second flexible pipe 21. The second connecting tube 33 is connected to the end tube 12 of the first flexible tube 11, and the first connecting tube 32 is connected to the end tube 22 of the second flexible tube 21. You may make it connect with.

<Description of conduit connection method>
The conduit connection device 10 configured as described above is unitized with the connection tube 31 connected to the end tube 12 of the first flexible tube 11 and the end tube 22 of the second flexible tube 21, Transported to the construction site. For example, the inclination angle and length of the connection pipe 31 with respect to the first flexible pipe 11 and the second flexible pipe 21 are determined by the positional relationship between the first conduit 1 and the second conduit 2 at each construction site. The conduit connection device 10 is manufactured according to this positional relationship. In addition, the conduit connection device 10 has an inclination angle and a length with respect to the first flexible tube 11 and the second flexible tube 21 of the connection tube 31 in the first and second conduits 1 and 2 at each construction site. In addition to being manufactured according to the positional relationship, it may be manufactured in accordance with a predetermined inclination angle or length in advance, such as 45 ° or 30 °, instead of being manufactured according to individual construction sites. Such a conduit connection device 10 is fixed by a shipping metal fitting (not shown) or the like so as not to bend the first flexible tube 11 and the second flexible tube 21.

  At the construction site, the laying groove is cut to expose the old conduit connecting the end of the first conduit 1 and the end of the second conduit 2. When the old conduit is removed from the first and second conduits 1, 2, the conduit connection device 10 is disposed instead. That is, as shown in FIG. 1, the first conduit 1 includes, for example, a flange portion 5 of the first conduit 1, a flange portion 17 of the first flexible tube 11, a fastening member 6 such as a bolt and a nut, welding, and the like. The second conduit 2 is connected to the flange portion 7 of the second conduit 2 with the flange portion 27 of the second flexible tube 21, the fastening member 8 such as a bolt and a nut, welding, or the like. Are connected by a known connection method. Thereafter, the fastening member of the shipping metal fitting is removed from the conduit connection device 10 so that the first and second flexible tubes 11 and 21 can be bent and stretched. When the conduit connecting device 10 is connected between the first and second conduits 1 and 2, the laying groove is backfilled.

  In the conduit connecting device 10 configured as described above, since the connecting pipe 31 is provided in accordance with the distance between the first conduit 1 and the second conduit 2, the first and second flexible tubes 11 are provided. , 21 can be installed between the first conduit 1 and the second conduit 2 without bending (flexible displacement). Therefore, the original displacement absorption amount can be used for new ground subsidence and earthquake countermeasures without losing the displacement absorption amount originally possessed by the first and second flexible tubes 11 and 21 as before. . Furthermore, since the connecting pipe 31 is inclined in the conduit connecting device 10, the product length can be made shorter than before, and the overall configuration can be reduced in weight and size. Therefore, it is possible to improve the convenience not only in the case of new construction but also in a narrow place where pipe replacement work or the like is performed. Therefore, there are many places where the entire piping can be made earthquake resistant, and the safety of the entire piping and the entire facility can be improved.

<Description of modification>
In the conduit connection device 10, the connection pipe 31 includes a first connection pipe 32 and a second connection pipe 33, and the second connection pipe 33 is inserted into the first connection pipe 32, The second connecting pipe 33 is provided so as to be slidable in the pipe axis direction with respect to the connecting pipe 32, so that the connecting pipe 31 is not limited to be extendable and contractable in the axial direction. As shown, the connecting tube 31 is provided in the middle of the connecting tube 31 so that the connecting tube 31 can be expanded and contracted in the axial direction by providing an elastic flexible tube 41 such as a bellows tube having flexibility, stretchability, and sealing properties. You may be allowed to. Even in such an example, the connecting pipe 31 can be expanded and contracted in the same manner as when the connecting pipe 31 is composed of the first connecting pipe 32 and the second connecting pipe 33. Furthermore, in such an example, since the connecting pipe 31 can also be bent (flexibly displaced) and can absorb the displacement, it can withstand greater ground subsidence and earthquakes. The telescopic flexible tube 41 may be any conventionally known tube, such as a conventionally known bellows tube, as long as the tube has flexibility, stretchability, and sealing properties.

  In addition, as shown in FIGS. 5 and 6, the conduit connection device 10 is configured such that one of the first flexible tube 11 and the second flexible tube 21 is flexible, stretchable, and sealed. A telescopic flexible tube 41 such as a bellows tube having For example, the flexible flexible tube 41 includes a bellows tube 42 having flexibility, stretchability, and further sealing, an end tube 43 integrally joined to one end of the bellows tube 42, and the bellows tube 42. And an end tube 44 integrally joined to the end. 5 and 6, the first flexible tube 11 is the telescopic flexible tube 41. However, as described above, the present invention is not limited to this, and the second flexible tube 21 is telescopic. The flexible tube 41 may be used. Furthermore, the telescopic flexible tube 41 may be any conventionally known tube as long as it is a tube having flexibility, stretchability, and sealing properties, such as a conventionally known bellows tube.

  Furthermore, even if either the first flexible tube 11 or the second flexible tube 21 is the telescopic flexible tube 41, the connection tube 31 is connected to the first connection tube 32. The second connecting pipe 33 may be provided so as to be slidable, or may be provided with elasticity by providing the elastic flexible pipe 41 in the middle.

  When either the first flexible tube 11 or the second flexible tube 21 is the telescopic flexible tube 41, the telescopic flexible tube 41 has stretchability. An impossible connection pipe 31 may be used.

  For example, as shown in FIG. 5A, the conduit connection device 10 may be configured such that the connection pipe 31 is a straight pipe.

  Further, as shown in FIG. 5B, the connecting pipe 31 includes an end tube 44 of the telescopic flexible tube 41 or an end tube 22 of the second flexible tube 21 (the end tube 12 of the first flexible tube 11). ). In such a case, for example, a vent pipe 51 such as 90 °, 45 °, 22.5 °, 11.25 ° may be used. As described above, when the vent pipe 51 is used instead of the connection pipe 31 and the end pipe 44 or the end pipe 22 (end pipe 12), the connection pipe 31 and the end pipe 44 or the end pipe 22 (end pipe 12) are welded. No work is required, and the manufacturing process can be simplified. In addition, the vent pipe 51 may be one in which the connection pipe 31, the end pipe 44, and the end pipe 22 (end pipe 12) are integrated.

  Further, as shown in FIG. 5C, the end tube 44 of the telescopic flexible tube 41 and the end tube 22 of the second flexible tube 21 (end tube 12 of the first flexible tube 11) are connected to a vent tube 52a. , 52b may be used to make a flange connection at an inclined portion. Of course, the connection to the vent pipes 52a and 52b may be made by a known connection method such as welding. In this case, the portion of the flexible tube 41 and the vent tube 52a, the portion of the second flexible tube 21 (first flexible tube 11) and the vent tube 52b, or the combined state thereof is handled as one unit. be able to.

  Further, as shown in FIG. 5D, an S-shaped vent pipe 53 may be used as the connection pipe. In this case, a portion of the telescopic flexible tube 41 and the vent tube 53, a portion of the second flexible tube 21 (first flexible tube 11) and the end tube 22 (end tube 12), or a state in which these are combined. It can be handled as a single unit. In FIG. 5D, the S-type vent pipe 53 in which the end pipe 44 of the telescopic flexible pipe 41 and the connection pipe 31 are integrated is used. However, the end pipe 22 (second pipe) of the second flexible pipe 21 is used. Alternatively, an S-type vent pipe 53 in which the end pipe 12) of the one flexible pipe 11 and the connection pipe 31 are integrated may be used. The connection with the other flexible tube may be a flange connection or a known connection method such as welding.

  Further, as shown in FIG. 5E, the end pipe 44 of the telescopic flexible pipe 41 and the end pipe 22 of the second flexible pipe 21 (end pipe 12 of the first flexible pipe 11) are connected to a vent pipe 52a. , 52b, and two bent pipes may be joined by welding at a portion (straight pipe portion) that becomes an inclined connecting pipe. The weld line may be perpendicular to the axis of the portion (straight pipe portion) to be the connection pipe, or may be oblique to the axis. FIG. 5E shows an example in which the weld line is perpendicular to the axis of the portion (straight pipe portion) that becomes the connecting pipe.

  Furthermore, as shown in FIG. 6 (A), the conduit connection device 10 can also be used when connecting the first conduit 1 and the second conduit 2 having different diameters. In this case, a different diameter pipe 54 is used as the connection pipe 31, one end is connected to the telescopic flexible pipe 41, and the other end is connected to the second flexible pipe 21 (first flexible pipe 11). To do. In addition, the connection between the expansion / contraction flexible tube 41 and one end of the connection tube 31 which is a different diameter tube and the connection between the second flexible tube 21 (first flexible tube 11) and the other end of the connection tube 31 are as follows: It may be a flange connection or a known connection method such as welding.

  In addition, when the amount of displacement between the first conduit 1 and the second conduit 2 is large, the vent pipes may not be directly connected as in the case of FIGS. 5C and 5E. . In such a case, as shown in FIG. 6B, the end tube 44 of the telescopic flexible tube 41 and the end tube 22 of the second flexible tube 21 (the end tube 12 of the first flexible tube 11). By using the vent pipes 52a and 52b, the straight pipe 55 can be interposed between the vent pipes 52a and 52b, and the inclined portion that becomes the connection pipe can be lengthened. The connection between the vent pipes 52a and 52b and the straight pipe 55 may be a flange connection or a known connection method such as welding.

  Further, as shown in FIG. 6C, the end tube 44 and the connection tube 31 of the telescopic flexible tube 41 are integrated, and the end tube 22 of the second flexible tube 21 (first flexible tube). 11 end pipe 12) and connecting pipe 31 are integrated with an S-type vent pipe 56. Thereby, the state which united the part of the expansion-contraction flexible tube 41, the vent tube 56, and the 2nd flexible tube 21 (1st flexible tube 11) can be handled as one unit.

  Further, as shown in FIG. 3, the conduit connecting device 10 is formed by obliquely processing the end portion of the end tube 12 of the first flexible tube 11 and the end portion of the first connecting tube 32 on the end tube 12 side. The opening end (end face) of the end portion of the end tube 12 and the end portion of the first connection tube 32 is not limited to being formed into an elliptical shape and joined by welding or the like, as shown in FIG. In addition, the end portion of the end tube 12 is manufactured in a smooth curved shape, and the end portion of the end tube 12 and the end portion of the first connecting tube 32 on the end tube 12 side are formed with respect to the tube axis P2. The opening end (end surface) of the end portion of the end tube 12 and the end portion of the first connection tube 32 may be formed in a circular shape and joined by welding or the like.

  Furthermore, as shown in FIG. 3, the conduit connecting device 10 has an end portion of the end tube 22 of the second flexible tube 21 and an end portion of the second connecting tube 33 on the end tube 22 side processed obliquely. The opening end (end face) of the end portion of the end tube 22 and the end portion of the second connection tube 33 is not limited to being formed into an elliptical shape and joined by welding or the like, as shown in FIG. Further, the end portion of the end tube 22 is manufactured to be curved in a smooth curved shape, and the end portion of the end tube 22 and the end portion of the second connecting tube 33 on the end tube 22 side are formed with respect to the tube axis P2. The opening end (end surface) of the end portion of the end tube 22 and the end portion of the second connection tube 33 may be formed in a circular shape and joined by welding or the like.

  Further, as shown in FIG. 8, the conduit connection device 10 is manufactured by bending the end tube 12 side of the first connection tube 32 into a smooth curved shape, and further, the end of the end tube 12 and the first connection are connected. The end portion of the tube 32 on the end tube 12 side is formed at right angles to the tube axis P1, and the end portion of the end tube 12 and the open end (end surface) of the end portion of the first connection tube 32 are formed in a circular shape. And may be joined by welding or the like. Further, as shown in FIG. 8, the conduit connection device 10 is manufactured such that the end pipe 22 side of the second connection pipe 33 is curved in a smooth curved shape, and further, the end of the end pipe 22 and the second connection are connected. The end of the tube 33 on the end tube 22 side is formed at right angles to the tube axis P3, and the end of the end tube 22 and the open end (end surface) of the end of the second connecting tube 33 are formed in a circular shape. And may be joined by welding or the like.

  Similarly, as shown in FIGS. 4, 5 (A), 5 (B), 6 (A), etc., the conduit connection device 10 is connected to the end side of the end tubes 12, 22, 44 or the connection tube 31. The end portions of the end tubes 12, 22, 44 and the end portions of the connection tubes 31 are formed at right angles to the axis, and the end tubes 12, 22 are manufactured. 44 and the open end (end surface) of the end of the connecting pipe 31 may be formed in a circular shape and joined by welding or the like.

  Further, as shown in FIG. 9, the conduit connecting device 10 may be manufactured such that the end tube 12 and the first connecting tube 32 are integrally manufactured and curved in a smooth curved shape. . Further, as shown in FIG. 9, the conduit connecting device 10 may be manufactured such that the end tube 22 and the second connecting tube 33 are integrally manufactured and curved in a smooth curved shape. .

  Further, the conduit connecting device 10 is not limited to the ducts such as the first flexible pipe 11, the second flexible pipe 21, and the connecting pipe 31 being a ductile cast iron pipe, but a steel pipe or other cast iron It may be a tube, a synthetic resin tube made of vinyl chloride, or the like.

  Furthermore, the present invention is applicable not only as a buried water pipe, but also as an exposed water pipe connected to a structure such as an aqueduct, a bridge, and an elevated water tank. The present invention is also applicable to plumbing work for middle water conduits and sewage pipes, and further, a fluid such as a gas such as city gas or cooling gas, or a solid such as a powder, granule or gel is flowing. It can also be applied to piping work for all conduits.

DESCRIPTION OF SYMBOLS 1 1st conduit | pipe, 2nd conduit | pipe, 3 foundation, 4 roads, etc. 5 flange part, 6 fastening member, 7 flange part, 8 fastening member, 10 conduit connection apparatus, 11 1st flexible tube, 12 end Tube, 13 first convex spherical portion, 14 first sleeve tube, 15 first concave spherical portion, 16 first outer tube, 16a front member, 16b rear member, 17 flange portion, 18 fastening member, 19 Rubber packing, 21 second flexible tube, 22 end tube, 23 second convex spherical portion, 24 second sleeve tube, 25 second concave spherical portion, 26 second exterior tube, 26a front member, 26b Rear member, 27 Flange portion, 28 Fastening member, 29 Rubber packing, 31 Connection tube, 32 First connection tube, 33 Second connection tube, 34 First engagement protrusion, 35 Second engagement protrusion, 36 Rubber packing, 41 Stretchable Flexible tube, 42 Bellows tube, 43 end tube, 44 end tube, 51 Vent tube, 52a Vent tube, 52b Vent tube, 53 S type vent tube, 54 Different diameter tube, 55 Straight tube, 56 S type vent tube

Claims (14)

A first flexible tube and a second flexible tube;
A connection tube connecting the first flexible tube and the second flexible tube;
At least one of the first flexible tube and the second flexible tube has a sleeve tube having a convex spherical portion at one end and a concave spherical portion that slidably supports the convex spherical portion. An outer tube,
There is a deviation between the tube axis of the first flexible tube and the tube axis of the second flexible tube,
The connection pipe is formed by connecting the first flexible pipe and the second flexible pipe in a state where the pipe axis of the connection pipe is inclined with respect to the pipe axes of the first and second flexible pipes. A conduit connection device characterized by connecting. An end tube is provided at each end of the sleeve tube of the first flexible tube and the sleeve tube of the second flexible tube,
Both the end of the end tube to be connected and the end of the connection tube have corresponding oblique end faces,
2. The conduit connection device according to claim 1, wherein an oblique end surface of the end tube is connected to an oblique end surface of the connection tube. An end tube connected to the connection tube is provided at each end of the sleeve tube of the first flexible tube and the sleeve tube of the second flexible tube,
The conduit connection device according to claim 1, wherein the end pipe or the connection pipe is provided in a smooth curved shape. The first flexible tube is connected to a first conduit in a first position;
The said 2nd flexible tube is connected with the 2nd conduit | pipe in the 2nd position shifted | deviated from the said 1st position, The conduit connection apparatus in any one of Claims 1-3 characterized by the above-mentioned. .   The conduit connection device according to any one of claims 1 to 4, wherein the connection pipe is provided to be extendable and contractible in a pipe axis direction.   The connection pipe has a first connection pipe connected to one of the first flexible pipe and the second flexible pipe, and a second connection pipe connected to the other. The second connection pipe is inserted into the first connection pipe, and the second connection pipe is provided so as to be slidable in the tube axis direction with respect to the first connection pipe. The conduit connection device according to claim 5.   The at least one of the first flexible tube and the second flexible tube is a telescopic flexible tube having flexibility and stretchability, according to any one of claims 1-6. Conduit connection device. In a conduit connection method for connecting a first conduit in a first position and a second conduit in a second position shifted from the first position,
A first flexible tube, a second flexible tube, and a connection tube connecting the first flexible tube and the second flexible tube; At least one of the two flexible tubes has a sleeve tube having a convex spherical portion at one end and an outer tube having a concave spherical portion that slidably supports the convex spherical portion, The tube axis of the flexible tube and the tube axis of the second flexible tube are misaligned, and the tube axis of the connection tube is aligned with the tube axis of the first and second flexible tubes. A conduit connection device connecting the first flexible tube and the second flexible tube in an inclined state with respect to the first conduit and the second conduit. ,
A conduit connection method for connecting the first flexible tube to the first conduit and connecting the second flexible tube to the second conduit. A flexible tube;
A connecting pipe for connecting the one flexible pipe to another flexible pipe,
The one flexible tube has a sleeve tube having a convex spherical portion at one end, and an outer tube having a concave spherical portion that slidably supports the convex spherical portion,
The connecting pipe is connected to the one flexible pipe in a state where the pipe axis of the connecting pipe is inclined with respect to the pipe axis of the one flexible pipe,
The other end of the connection pipe is connected to the other flexible pipe. The sleeve tube of the one flexible tube is provided with an end tube,
The conduit connection device according to claim 9, wherein the oblique end surface of the end tube is connected to the oblique end surface of the connection tube. The sleeve tube of the one flexible tube is provided with an end tube,
10. The conduit connection device according to claim 9, wherein the end tube or the connection tube is provided in a smooth curved shape. The one flexible tube is connected to a first conduit in a first position;
The other end of the connection pipe is connected to the other flexible pipe connected to the second conduit at the second position shifted from the first position. The conduit connection device according to any one of the above.   The conduit connection device according to any one of claims 9 to 12, wherein the connection pipe is provided so as to be extendable and contractible in a pipe axis direction.   The connection pipe has a first connection pipe connected to one of the one flexible pipe and the other flexible pipe, and a second connection pipe connected to the other, The second connecting pipe is inserted into the first connecting pipe, and the second connecting pipe is provided so as to be slidable in the pipe axis direction with respect to the first connecting pipe. Item 14. The conduit connection device according to Item 13.

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