JP2020008030A - Conduit line repair method, piping system and connecting joint - Google Patents

Abstract

To provide a conduit line repair method which can repair a part of a conduit line while suppressing the damage of a pipe material which should remain, a piping system and a telescopic joint.SOLUTION: The conduit line repair method using a telescopic joint 30 having a main body part 32 and a slide part 36, includes: a removal process for removing a removal-objective pipe material 10a by making a coupling 20 for connecting the removal-objective pipe material 10a and an adjacent pipe material 10b remain; a telescopic joint attachment process for attaching the telescopic joint 30 to the coupling 20 after the removal process; a new pipe material arrangement process for arranging a new pipe material 10c in place of the removal-objective pipe material 10a; and a connecting process for connecting the new pipe material 10c and the telescopic joint 30.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a method for repairing a pipe forming a drainage channel and a joint for connecting pipes forming the pipe.

  2. Description of the Related Art Conventionally, there have been provided a construction method for forming a pipe that forms a drainage channel by connecting a plurality of pipes, a joint for connecting the pipes, and the like. Here, when repairing a part of an existing pipeline, the end of the pipeline is fixed, the separation distance between the ends of the pipeline is fixed, and a new pipe is inserted from the axial direction. There is a case where the construction is required in a so-called hell plumbing where there is no cost. Since there is no insertion allowance for the pipe material between the ends of such hell piping, it is difficult to arrange and connect the intermediate pipe material.

  A method of repairing a pipe in such a state of hell piping is disclosed in Patent Document 1 below. According to the pipe repair method of Patent Document 1, it is said that the pipe material can be replaced while the centering of the pipe material is easily performed.

JP-A-5-52278

  By the way, as the pipe material forming the pipe, besides a pipe made of a material having high impact resistance such as a so-called PVC pipe made of a vinyl chloride-based material, a ceramic pipe made of a ceramic material (for example, high ceramics) Some materials are made of a material that is easily damaged by impact, such as a pipe.

  Here, when repairing a part of the pipeline, if the tubing that forms the pipeline contains a porcelain tube, in addition to the tubing to be removed, the porcelain tube that is not damaged during construction will be impacted and damaged. The problem was pointed out. As described above, the construction of pipelines that include ceramic pipes requires not only the difficulties of being hell piping, but also care must be taken not to damage the existing ceramic pipes that are vulnerable to impact. I was

  Therefore, an object of the present invention is to provide a pipeline repair method, a piping system, and an expansion joint that can repair a part of a pipeline while suppressing damage to a remaining pipe material.

  Here, the inventor of the present invention has examined the above-mentioned problems, and found that the cause of the damage to the pipe material to be left is due to the work of removing the pipe joint (existing pipe joint) attached to the remaining pipe material. It was found that there was. Specifically, when removing the pipe material to be removed and then removing the existing pipe fitting attached to the adjacent pipe material, the work to remove the pipe fitting is performed in addition to factors such as the adjacent pipe material becoming brittle. It was concluded that adjacent pipes would be damaged by vibrations and shocks at the time. Further, the inventor of the present invention has made intensive studies and found that if the existing pipe joint is left and the pipe to be repaired is replaced, damage to the existing pipe can be suppressed.

  The pipe line repair method of the present invention provided by the above knowledge repairs a pipe line by replacing a pipe to be removed, which is a part of a pipe formed by a plurality of pipes, with a new pipe, which is a new pipe. A pipe joint repair method, wherein an expansion joint including a cylindrical main body and a slide portion slidable in the axial direction of the main body is used, and the pipe material to be removed and the pipe material to be removed are used. A removing step of removing the pipe material to be removed while leaving the existing pipe joint connecting the pipe material adjacent to the pipe material, and attaching the expansion joint to at least one of the existing pipe fittings after the removing step. An expansion joint mounting step, a new pipe arrangement step of arranging the new pipe in place of the pipe to be removed, and sliding the slide portion toward the new pipe, the new pipe and the expansion joint It is characterized in that and a connection step of connecting.

  ADVANTAGE OF THE INVENTION According to the pipe line repair method of this invention, the replacement work of a pipe material can be performed, leaving the existing pipe joint. As a result, the pipe repair method of the present invention can reduce the cause of breakage of the existing pipe material and suppress occurrence of unnecessary replacement work of the pipe material.

  The pipe repair method of the present invention is such that, in the removing step, the existing pipe joint disposed at both ends of the target pipe is left to remove the target pipe, and the expansion joint is removed. In the attaching step, the expansion joint is attached to both of the existing pipe joints, and in the connecting step, the slide portions are attached to both ends of the new pipe material, and the two slide portions are brought close to each other. It is preferable that the expansion joint is connected to both ends of the new pipe material by sliding in a direction in which the expansion joint is connected.

  ADVANTAGE OF THE INVENTION According to the pipeline repair method of this invention, after a part of pipe material is removed, even if it is what is called a hell pipe, replacement of pipe material can be performed suitably. Further, according to the pipeline repair method of the present invention, it is possible to perform the replacement work of the pipe material while leaving the existing pipe joint. As a result, the pipe repair method of the present invention can reduce the cause of breakage of the existing pipe material and suppress occurrence of unnecessary replacement work of the pipe material.

  In the pipe repair method of the present invention, the expansion joint includes one or more protrusions provided so as to protrude outward in the axial direction, and in the new pipe material arranging step, at least the new pipe material is provided. It may be positioned in contact with one of the protrusions.

  According to the above-described configuration, in the operation of arranging the new tubing material on the pipeline, the new tubing material can be easily positioned on the pipeline. As a result, the pipe repair method of the present invention can reduce the work load required for positioning the pipe material.

  In the pipe repair method of the present invention, in the expansion joint attaching step, the expansion joint may be attached to the existing pipe joint such that at least a part of the protrusion is located below.

  According to the above-described configuration, in the operation of arranging the new tubing material on the pipeline, the new tubing material can be easily positioned on the pipeline. As a result, the pipe repair method of the present invention can reduce the work load required for positioning the pipe material. Further, according to the above-described configuration, when the new pipe material enters the pipeline from above to below, the new pipe material is temporarily positioned on the protruding portion, and the new pipe material is held in the positioned state. Members and work load can be reduced.

  The expansion joint of the present invention includes a cylindrical main body, a slide portion slidable in the axial direction of the main body, and one or a plurality of protrusions provided to protrude outward in the axial direction. It is characterized by having.

  ADVANTAGE OF THE INVENTION According to the expansion joint of this invention, in the operation | work which makes a new pipe material enter into a pipeline and arrange | position, a new pipe material can be easily positioned on a pipeline in the position where a new pipe material and a protrusion part contact. As a result, the pipe repair method of the present invention can reduce the work load required for positioning the pipe material. Further, according to the expansion joint of the present invention, if the projecting portion is arranged below when the new tube material enters the pipeline from above to below, the new tube material is positioned while being temporarily placed on the projecting portion. In addition, it is possible to reduce a member and a work load for holding the new pipe material in a positioned state.

  The expansion joint of the present invention is an expansion joint capable of expanding and contracting in the axial direction, and includes a cylindrical main body, a slide portion slidable in the axial direction of the main body, and the axial direction. One or a plurality of protrusions provided so as to protrude outward, and a thick portion having a thickness as compared with other portions of the main body portion at one end of both ends of the main body portion Is provided, and the slide portion is provided at the other end.

  ADVANTAGE OF THE INVENTION According to the expansion joint of this invention, when connecting two different pipes, a pipe material can be connected in a favorable connection state.

  The expansion joint of the present invention is provided such that the thick portion is flush with an end surface on one end side of the main body portion and that the end surface of the main body portion is enlarged radially outward. There may be.

  ADVANTAGE OF THE INVENTION According to the expansion joint of this invention, when connecting two different pipes, a pipe material can be connected in a favorable connection state by dispersing contact pressure.

  The piping system of the present invention is a piping system in which at least a part of a pipe formed by a plurality of pipes includes a ceramic pipe made of a ceramic material, wherein the ceramic pipe is connected to another pipe. A pipe joint and an expansion joint are provided in the different pipe connection section, and the expansion joint slides in the axial direction of the cylindrical main body and the main body. A sliding portion that is made possible, and the length in the axial direction is extended by sliding the sliding portion outward in the axial direction with respect to the main body portion. In the pipe connection part, the pipe joint is mounted on a connection part between the ceramic tube material and the main body part, and the slide part is mounted in the stretched state on a connection part between the main body part and the other pipe material. Specially It is an.

  ADVANTAGE OF THE INVENTION According to the piping system of this invention, the connection state of a ceramic pipe material and another pipe material in a heterogeneous pipe connection part can be made favorable.

  The piping system of the present invention may have a different pipe connection portion on both sides of the other pipe material, and the slide portion in the extended state may be attached to both ends of the other pipe material. preferable.

  According to the above configuration, it is possible to improve the connection state between the ceramic tube material and another tube material at the heterogeneous pipe connection portion.

  Advantageous Effects of Invention According to the present invention, it is possible to provide a pipeline repair method, a piping system, and an expansion joint that can repair a part of a pipeline while suppressing damage to remaining pipe material.

It is a schematic diagram which shows the existing pipeline including a ceramic tube. It is sectional drawing which shows the coupling of the existing pipeline of FIG. 1 shows an expansion joint according to an embodiment of the present invention. (A) is a front view, (b) is a side view. FIG. 4 is a cross-sectional view of the expansion joint of FIG. 3 in a side view. (A) shows a non-stretched state, and (b) shows a stretched state. It is a schematic diagram which shows the existing pipeline which contains the pipe material for repair. It is a figure which shows the state after the removal process in the pipeline repair method of this invention. It is a figure which shows the expansion joint connection process in the pipeline repair method of this invention. It is a figure which shows the new pipe | tube arrangement | positioning process in the pipework method of this invention. It is a figure which shows the state after the connection process in the pipeline repair method of this invention. It is a figure which shows the different kind pipe connection part formed in the pipeline.

  Hereinafter, a pipe repair method and an expansion joint according to the present invention will be described with reference to the drawings. In the following description, the existing pipeline 1 will be described first, and then the expansion joint 30 and the pipeline repair method according to the embodiment of the present invention will be described.

  As shown in FIG. 1, a plurality of pipes 10 are connected to each other in a pipe 1 to form a flow path (drainage path) for sewage, rainwater, and the like. The pipe 1 has a portion where a plurality of pipes 10 are connected via a coupling 20 (pipe joint). The pipe 1 may include a drainage mass, an expansion joint, and the like, not shown, in addition to a portion to which the pipe member 10 is connected via the coupling 20.

  The tube 10, the coupling 20, and the expansion joint 30, which will be described later, are connected so that their axes are substantially coincident with each other, and form mutually coincident axial directions X (see FIG. 1). Therefore, in the following description, the axial direction of the pipe member 10, the coupling 20, and the expansion joint 30 described later may be simply described as “axial direction X”.

  The pipe member 10 is a tubular member for forming the pipe line 1. The “tube material” includes a ceramic tube 12 (porcelain material) made of a ceramic material, a PVC tube made of a vinyl chloride resinous material, a fume tube made of reinforced concrete, and the like. In addition, the porcelain pipe 12 is contained at least in part in the pipe material 10 forming the pipe line 1. FIG. 1 shows a part of a pipeline 1 in which a plurality of ceramic tubes 12 are interconnected via a coupling 20.

  The coupling 20 (pipe joint) is a short tubular connecting member for connecting the pipe material 10. As shown in FIG. 2, openings are formed on both sides in the axial direction X of the coupling 20, and the openings are formed as receiving ports 22 into which other tubular members are inserted. In the vicinity of the receiving ports 22, 22 of the coupling 20, seal portions 26, 26 formed as annular rubber rings are provided. The seal part 26 is fitted into a seal fitting part 24 formed on the coupling 20 and attached to the inner peripheral surface of the coupling 20.

  In the pipe 1, the two ceramic pipes 12 (tube materials 10) are inserted into the receiving ports 22, 22 of the coupling 20 so that the ends of the two ceramic pipes 12 (tube material 10) face each other (see FIG. 2). In other words, the coupling 20 is attached to the outer peripheral surface of the ceramic tube 12 (tube material 10) arranged adjacent to each other, and connects the two ceramic tubes 12 (tube material 10) arranged adjacent to each other. In addition, seal portions 26, 26 are attached to the outer peripheral surface of the ceramic tube 12 (tube material 10) disposed adjacent to the tube so as to be substantially in close contact with each other, and the connection portions thereof are stopped.

<About expansion joints>
The expansion joint 30 is used in the pipeline repair method of the present invention described in detail below. As shown in FIG. 3, the expansion joint 30 has a cylindrical main body 32 and a slide 36 that is separate from the main body 32. In addition, as shown in FIG. 4A, a thick portion 34 is provided in the main body 32. Further, as shown in FIGS. 3 and 4, the slide portion 36 is provided with a protrusion 38, a handle 40, seals 42 and 44, and a stopper 46.

  In the following description, of both ends of the expansion joint 30 in the axial direction X, the end (one end) on the side where the thick portion 34 is provided is simply referred to as “base end 30a”, and the other end is referred to simply as “base end 30a”. The other end 30b "may be described.

  The slide portion 36 is a short cylindrical member. The slide portion 36 has a size whose inner diameter substantially matches the outer diameter of the main body 32. As shown in FIG. 3B, the slide portion 36 is attached to the other end 30 b of the main body 32. The slide part 36 is slidable in the axial direction X with respect to the main body part 32.

  The expansion joint 30 can expand and contract the length in the axial direction X by moving the slide portion 36 in the axial direction X with respect to the main body 32. Specifically, as shown in FIG. 4A, in a state where the slide portion 36 is arranged on the base end 30 a side with respect to the main body portion 32 (non-stretched state), the length of the expansion joint 30 in the axial direction X is set. Becomes L1. Further, as shown in FIG. 4B, the entire length of the expansion joint 30 is extended by sliding the slide portion 36 to the outside in the axial direction X (the other end 30 b side) with respect to the main body portion 32 by the distance L2. In the extended state (extended state), the axial direction X of the expansion joint 30 has a length L3. As described above, the expansion joint 30 is capable of extending and contracting the length in the axial direction X by displacing the slide portion 36 in the axial direction X with respect to the main body 32.

  The base end 30a side of the expansion joint 30 is a spigot 31a inserted into another pipe member 10, a joint, or the like. Further, the other end 30b side of the expansion joint 30 is a receiving port 31b into which another pipe material 10, a joint or the like is inserted in the stretched state (see FIG. 8 and the like).

  As shown in FIG. 4A, the thick portion 34 is provided on the base end 30a (one end) side of the main body 32. The thick portion 34 is a portion that is thicker than other portions of the main body 32. The thick portion 34 of the present embodiment forms a portion that is thicker than other portions of the main body 32 by fitting (outer fitting) the sleeve member 34 a to the base end 30 a of the main body 32. The outer peripheral surface at the base end 30 a of the main body portion 32 is provided so as to expand radially outward. In addition, as shown in FIG. 4A, the sleeve member 34a is attached so as to be flush with the end face of the base end 30a of the main body 32. In other words, the thick portion 34 is formed such that the thickness T1 of the main body 32 and the thickness T2 of the sleeve member 34a are doubled, and the end face of the base end 30a of the main body 32 is enlarged. The thickness T3 is formed on the end face on the base end 30a side.

  The thickness of the thick portion 34 and the end face of the main body 32 on the base end 30a side will be described in more detail. The inner diameter D1 of the main body 32 is substantially equal to the inner diameter D4 of the ceramic tube 12 (see FIG. 10). On the other hand, the outer diameter D2 of the portion of the main body 32 where the thick portion 34 is not provided is smaller than the outer diameter of the ceramic tube 12. The expansion joint 30 fills the thickness difference between the main body 32 and the ceramic tube 12 by providing the thick part 34. Stated another way, the expansion joint 30 is configured such that the outer diameter of the portion of the main body portion 32 where the thick portion 34 is provided is approximately equal to the outer diameter D5 of the ceramic tube 12 ( (See FIG. 10). Thereby, the expansion joint 30 is configured such that, when the main body 32 is inserted into the receiving port 22 of the coupling 20, the main body 32 is connected to the axis of the ceramic tube 12 inserted into the other receiving port 22 of the coupling 20. They can be substantially matched.

  When the base end 30a of the main body 32 is arranged adjacent to the ceramic tube 12, the expansion joint 30 may be arranged so that the end surface of the main body 32 and the end surface of the ceramic tube 12 substantially coincide with each other. it can. Accordingly, the expansion joint 30 can be expected to have an effect of suppressing the bias of the contact pressure and dispersing the contact pressure at the connection portion between the main body 32 and the ceramic tube 12.

  The protrusion 38 is provided to facilitate positioning of the tube 10 with respect to the expansion joint 30. As shown in FIG. 3B, the protruding portion 38 is provided so as to protrude outward in the axial direction X from the other end 30 b of the slide portion 36.

  As shown in FIG. 3A, three protrusions 38 are provided on the expansion joint 30 of the present embodiment. More specifically, the expansion joint 30 of the present embodiment is provided between the protrusions 38b, 38c provided on the side of the slide portion 36 and the protrusions 38b, 38c in the circumferential direction of the slide portion 36. Projection 38a. In addition, the expansion joint of the present invention is not limited to the one provided with the three protrusions as in the present embodiment. For example, the expansion joint of the present invention may be provided with two protrusions, or may be provided with four protrusions. Further, the projecting portions 38 are provided at predetermined intervals while being unevenly distributed in a part of the slide portion 36 in the circumferential direction. Specifically, in the state shown in FIG. 3A, a plurality (three in this embodiment) of protruding portions 38 are provided at predetermined intervals in the lower area while being unevenly distributed in the lower area. Have been. On the other hand, in FIG. 3A, the protrusion 38 is not provided in an area above the protrusions 38b and 38c. In other words, in the expansion joint 30, the distance between the area where the protrusions 38 are arranged at predetermined intervals in the circumferential direction (the area on the lower side in FIG. 3A) and the distance between the protrusions 38 is longer than the predetermined distance described above. It has an area that is largely separated in the circumferential direction (an area on the upper side in FIG. 3A).

  The handle 40 is provided as a handle for sliding the slide portion 36 with respect to the main body 32. As shown in FIG. 3A, the handle 40 is provided so as to radially oppose the outer peripheral surface of the slide portion 36. The expansion joint 30 allows the operator to easily move the slide portion 36 with respect to the main body portion 32 by gripping the handle 40 and performing a slide operation of the slide portion 36.

  As shown in FIG. 4, the seal portions 42 and 44 are provided near both ends of the slide portion 36 in the axial direction X. The seal portions 42 and 44 are fitted into seal fitting portions 42 a and 44 a formed on the slide portion 36, and are attached to the inner peripheral surface of the slide portion 36. Of the two seal portions 42 and 44, the seal portion 44 provided at the base end 30 a stops water between the main body portion 32 and the slide portion 36. Further, the seal portion 42 provided at the other end 30b can stop water between the slide portion 36 and the pipe 10 inserted into the receiving port 31b.

  The stopper portion 46 is provided to regulate a sliding range of the sliding portion 36 with respect to the main body 32. As shown in FIG. 4, the stopper portion 46 includes a contact portion 46 a formed in a step shape on the outer peripheral surface of the main body 32 and a convex portion 46 b provided on the inner peripheral surface of the slide portion 36. . The stopper portion 46 regulates the movement of the slide portion 36 toward the other end 30b at a position where the convex portion 46b contacts the contact portion 46a. Thus, the expansion joint 30 prevents the slide portion 36 from coming off the main body 32.

<About pipeline repair method>
Subsequently, a pipe repair method according to the embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 5, in the existing pipeline 1, the damaged portion K is included in the ceramic tube 12 (tube material 10), and the ceramic tube 12 including the damaged portion K is removed as the removal target tube 10 a. A case in which the target pipe 10a is removed and replaced with a new pipe 10 (new pipe 10c) will be described.

  In the following description, the pipes 10 arranged adjacently on both sides of the pipe 10a to be removed will be described as adjacent pipes 10b.

  The removal target pipe 10a and the adjacent pipe 10b are both ceramic pipes 12. In the present embodiment, an example will be described in which a PVC pipe 13 made of a vinyl chloride-based material is used as the new pipe 10c arranged in place of the pipe 10a to be removed.

  In the repair work for removing the removal target pipe material 10a included in the existing pipeline 1 and disposing the new pipe material 10c, first, excavation work is performed to expose the removal target pipe material 10a buried in the ground. In this specification, a detailed description of the excavation work will be omitted.

<Removal process>
As shown in FIG. 5, the removal process is performed in a state in which the soil around the pipe to be removed 10a is removed and the pipe to be removed 10a is exposed. The method of removing the pipe member 10a to be removed is not particularly limited. For example, a method of using the brittle property of the tubing 12a to be removed as the porcelain tube 12 and crushing the tubing 10a with a hammer or the like can be used.

  In the removal step, an operation of removing the pipe material 10a to be removed is performed while leaving the coupling 20 (pipe joint, existing pipe joint) connecting the pipe material 10a to be removed and the adjacent pipe material 10b. Specifically, as shown in FIG. 6, the removal target pipe 10a is removed while the coupling 20 connecting the removal target pipe 10a and the adjacent pipe 10b is attached to the adjacent pipe 10b.

  Thereby, the cause of breakage of the porcelain tube 12 (adjacent tube material 10b) to be left can be reduced, and it is possible to suppress occurrence of unnecessary replacement of the tube material 10. Further, in the pipeline 1 after the repair work, the water stopping structure by the seal portion 26 that stops the water between the existing ceramic pipe 12 (the pipe material 10) and the coupling 20 can be used.

<Expansion joint mounting process>
As shown in FIG. 7, after the removal step, the expansion joint 30 is mounted in the expansion joint mounting step. Specifically, after the removal target pipe 10a is removed, the expansion joint 30 is fitted into the coupling 20. The expansion joint 30 is attached to the coupling 20 by inserting the spigot 31a (the base end 30a) into the socket 22 of the coupling 20. When the expansion joint 30 is inserted into the coupling 20, the expansion joint 30 is in a state in which the slide portion 36 is arranged on the base end 30a side (non-extended state).

  As shown in FIG. 8, when the expansion joint 30 is attached to the coupling 20, the main body 32 of the expansion joint 30 and the adjacent pipe member 10b are arranged so that the end faces face each other (see an enlarged view of FIG. 8). After the expansion joint mounting step, the expansion joint 30 has the seal portion 26 of the coupling 20 mounted on the outer peripheral surface of the main body portion 32. Thereby, the connection between the adjacent pipe member 10b and the main body 32 is stopped.

  In addition, in the expansion joint mounting step, it is desirable that a lubricant is applied to the spout 31 a of the expansion joint 30 and the receiving port 22 of the coupling 20. Thereby, the expansion joint 30 can be smoothly inserted into the coupling 20. Further, in the expansion joint mounting step, it is desirable that the expansion joint 30 be arranged such that the intermediate projection 38 a of the three projections 38 faces downward.

  As shown in FIG. 8, when the expansion joint 30 is attached to the coupling 20, the separation distance of the end portion of the pipeline 1 (the separation distance between the one expansion joint 30 and the other expansion joint 30) is the distance L4. .

<New tube preparation process>
Next, a new pipe material 10c having a length L4 according to the separation distance of the end portion of the pipeline 1 (the separation distance between the one expansion joint 30 and the other expansion joint 30) is prepared. As the new tube material 10c, a tube having a standardized length may be used. However, a new tube having a length L4 is cut by cutting a predetermined length of tube at the site or bonding a plurality of tubes. It is also possible to manufacture the tube material 10c. When the PVC pipe 13 made of vinyl chloride is used as the new pipe material 10c as in the present embodiment, the length adjustment by cutting or bonding becomes extremely easy.

  It is desirable that the end face of the new pipe material 10c be chamfered. It is desirable that a lubricant is applied to the end of the new pipe material 10c and the receiving port 31b of the expansion joint 30. Thereby, the connection between the new pipe member 10c and the expansion joint 30 can be performed smoothly.

<New tube placement process>
Next, as shown in FIGS. 8 and 9, the new pipe member 10 c is disposed between the two expansion joints 30. That is, the new pipe member 10c is disposed in place of the removal target pipe member 10a. At this time, the end face of the new pipe material 10c and the end face of the main body 32 of the expansion joint 30 (the end face on the other end 30b side) are in contact with each other (see FIG. 10).

  In addition, in the expansion joint mounting step, when the projection 38a of the three projections 38 of the expansion joint 30 is disposed so as to be lower, the new pipe member 10c is moved downward from the upper side of the pipe line 1. The new pipe member 10c can be easily positioned by disposing the new pipe member 10c. Specifically, when the new pipe member 10c is inserted into the pipeline 1 from above and disposed downward, the new pipe member 10c is supported from below by the protruding portions 38a, 38b, and 38c at a position where the new pipe material 10c contacts the protruding portion 38a. It is temporarily placed in a positioned state (see the enlarged view of FIG. 9). The new pipe member 10c is positioned so as to substantially coincide with the axis of the main body 32. In this way, in the operation of arranging the new pipe member 10c to enter the pipeline 1, the new pipe member 10c can be easily positioned so as to coincide with the axis of the main body 32.

<Connection process>
Next, as shown in FIG. 9, in the connecting step, the slide portions 36 provided on the two expansion joints 30 are slid in directions approaching each other. Thereby, the receptacle 31b of the expansion joint 30 is fitted into one end of the new pipe material 10c, and the receptacle 31b of the expansion joint 30 is fitted into the other end. In other words, the new pipe material 10c is fitted into the expansion joint 30 so as to be sandwiched from both sides in the axial direction X. In addition, the seal portion 42 provided on the slide portion 36 is substantially in close contact with the outer peripheral surface of the new pipe 10c, and the connection between the new pipe 10c and the main body 32 is stopped in a state where water is stopped.

  After the above process is completed, the excavated portion is backfilled. Through the above steps, the repair of the pipeline 1 is completed.

  As described above, according to the pipeline repair method of the present invention, after the pipe material 10a to be removed is removed, the end portions of the pipeline 1 face each other, and a new pipe material ( The new tubing 10c) can be easily arranged and connected. In addition, the connection (different pipe connection 60) between the new pipe 10c and the existing pipe 10 (adjacent pipe 10b) is replaced with the seal 26 of the coupling 20 and the seal of the expansion joint 30 attached to the existing pipe 10. Water can be stopped by 42 and 44. As described above, according to the pipeline repair method of the present invention, there is no need to perform a water stop work using a mortar or the like between the existing pipe material 10 and the new pipe material 10c, and the replacement of the pipe material 10 is simplified. Can be.

  Next, a description will be given of a piping system 50 which is the pipeline 1 having the heterogeneous pipe connection portion 60. The piping system 50 is obtained, for example, after repairing the pipeline 1 by the above-described pipeline repair method.

  As shown in FIG. 10, the piping system 50 includes a ceramic pipe 12 in a pipe 1 formed by a plurality of pipes 10. Further, the piping system 50 includes a heterogeneous pipe connecting portion 60 which is a portion where the ceramic pipe 12 and another pipe material 10 (the PVC pipe 13) are connected.

  In the piping system 50, the porcelain pipe 12 and the PVC pipe 13 are connected via the coupling 20 and the expansion joint 30 at the different pipe connection part 60. Further, in the different kind pipe connection part 60, the main body part 32 and the PVC pipe 13 are connected in a state where the expansion joint 30 is in an extended state.

  The piping system 50 is provided with different pipe connection portions 60 on both sides of the PVC pipe 13. FIG. 10 shows a different pipe connecting portion 60 provided on one end side of the PVC pipe 13 (the right side of the PVC pipe 13 in FIG. 10), and a different pipe connecting section provided on the other end side of the PVC pipe 13. 60 is omitted from the drawing.

  As shown in FIG. 10, in the connection portion where the main body portion 32 of the expansion joint 30 and the ceramic tube 12 are adjacent to each other in the heterogeneous pipe connection portion 60, the end surface of the ceramic tube 12 and the end surface of the thick portion 34 are arranged to be in contact with each other. Have been. The inner diameter D <b> 1 of the main body 32 is set to a size that substantially matches the inner diameter D <b> 4 of the ceramic tube 12. The expansion joint 30 has an outer diameter D <b> 3 of a portion of the main body 32 where the thick part 34 is provided, which is substantially equal to an outer diameter D <b> 5 of the ceramic tube 12. Thereby, in the dissimilar pipe connection portion 60, when the main body 32 is inserted into the receiving port 22 of the coupling 20, the axis of the main body 32 is substantially aligned with the axis of the ceramic tube 12. Have been.

  Moreover, in the different kind pipe connection part 60, it arrange | positions so that the end surface of the main-body part 32 and the end surface of the ceramic tube 12 may substantially correspond. Accordingly, the piping system 50 can disperse the contact pressure by suppressing the bias of the contact pressure at the connection portion between the main body 32 and the ceramic tube 12.

  INDUSTRIAL APPLICABILITY The present invention can be suitably adopted as a repair work for repairing a part of a pipeline and a joint used in the repair work.

DESCRIPTION OF SYMBOLS 1 Pipeline 10 Pipe material 10a Pipe material to be removed 10b Adjacent pipe material 10c New pipe material 12 Ceramic tube (tube material, ceramic tube material)
13 PVC pipe (tube material)
20 Coupling (Piping, existing fittings)
30 expansion joint 30a base end (one end)
30b Other end 32 Body part 34 Thick part 36 Slide part 38 Projection part 38a Projection part 38b Projection part 38c Projection part 50 Piping system 60 Heterogeneous pipe connection part X axis direction

Claims (9)

A pipe repair method for repairing a pipe by replacing a pipe to be removed forming a part of a pipe formed by a plurality of pipes with a new pipe, which is a new pipe,
An expansion joint including a cylindrical main body and a slide portion slidable in the axial direction of the main body is used,
A removal step of removing the pipe to be removed, leaving an existing pipe joint connecting the pipe to be removed and the pipe adjacent to the pipe to be removed,
After the removing step, an expansion joint attaching step of attaching the expansion joint to at least one of the existing pipe joints,
A new pipe placement step of placing the new pipe in place of the removal target pipe,
A connection step of sliding the slide portion toward the new pipe material and connecting the new pipe material and the expansion joint to each other. In the removing step, the removal target pipe is removed while leaving both the existing pipe joints arranged at both ends of the removal target pipe,
In the expansion joint attaching step, the expansion joint is attached to both of the existing pipe joints,
In the connecting step, the slide portions are respectively attached to both ends of the new pipe material, and the expansion joints are connected to both ends of the new pipe material by sliding the two slide portions in directions approaching each other. The pipe repair method according to claim 1, wherein The expansion joint includes one or more protrusions provided to protrude outward in the axial direction,
The pipe repair method according to claim 1, wherein, in the new pipe placement step, the new pipe is positioned in contact with at least one of the protrusions.   4. The pipeline repair according to claim 3, wherein in the expansion joint mounting step, the expansion joint is mounted on the existing pipe joint such that at least a part of the protrusion is located below. 5. Method. An expansion joint used in any one of the pipeline repair methods according to claim 1,
A cylindrical main body,
A sliding portion slidable in the axial direction of the main body portion,
An expansion joint having one or more protrusions provided to protrude outward in the axial direction. An expansion joint whose length in the axial direction can be expanded and contracted,
A cylindrical main body,
A sliding portion slidable in the axial direction of the main body portion,
Having one or more protrusions provided to protrude outward in the axial direction,
At both ends of the main body, one end is provided with a thicker portion that is thicker than other portions of the main body, and the other end is provided with the slide portion. Expansion joints.   The said thick part is provided so that it may be flush with the end surface of the one end side of the said main-body part, and it may be provided so that the end surface of the said main-body part may expand radially outward. The expansion joint as described. A piping system including a porcelain tube material formed of a ceramic material in at least a part of a conduit formed by a plurality of tube materials,
It has a different kind of pipe connection part in which the ceramic pipe material and another pipe material are connected,
In the said heterogeneous pipe connection part,
Pipe fittings,
Expansion joints are provided,
The expansion joint,
A cylindrical main body, and a sliding portion slidable in the axial direction of the main body,
By sliding the slide portion to the outside in the axial direction with respect to the main body portion, the length in the axial direction is extended to an extended state,
In the heterogeneous pipe connection,
The pipe joint is attached to a connection portion between the ceramic tube material and the main body,
The piping system, wherein the slide portion is attached to the connection portion between the main body portion and the other pipe material in the extended state. Having a dissimilar pipe connection on both sides of the other pipe material,
The piping system according to claim 8, wherein the slide portion in the extended state is attached to both ends of the other pipe material.

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