JP6482380B2 - Bifurcation structure of fluid pipe - Google Patents

Description

  According to the present invention, a branch port having a diameter smaller than the inner diameter of the branch pipe portion is formed in a branch formation portion of the rehabilitation pipe formed by a lining process on an inner peripheral surface of a fluid pipe provided with the branch pipe portion. A coated tubular body that covers the inner peripheral surface of the branch port in the rehabilitated pipe is mounted in a state that prevents fluid from entering between the joint surfaces of the outer peripheral surface of the pipe and the inner peripheral surface of the fluid pipe. The present invention relates to a branch structure of a fluid pipe.

  In the branch structure of the fluid pipe in which the branch pipe portion is integrally formed with the fluid pipe, the diameter of the branch port and the branch pipe are between the opening peripheral edge of the branch port of the rehabilitation pipe and the inner peripheral surface of the branch pipe portion. There is a relatively large step corresponding to the difference from the inner diameter of the portion.

Therefore, a bush that is an example of a coated cylindrical body is inserted into the branch port of the rehabilitation pipe, and a tube inner side cylinder portion that protrudes toward the inner peripheral surface side of the rehabilitation pipe in the bush and a tube that protrudes toward the outer peripheral surface side of the rehabilitation pipe When the diameter of the outer cylinder is expanded by the diameter expansion means, the outer peripheral edge of the branch port on the inner peripheral surface of the rehabilitated pipe that becomes the bending start point with a small amount of diameter expansion deformation in the tube inner cylinder of the bush It can be securely crimped to the part.
However, in the tube outer tube portion of the bush, the step between the opening peripheral portion of the branch port of the rehabilitating tube and the inner peripheral surface of the branch tube portion is bent, and the tube outer tube portion of the bush is Since it is necessary to crimp the tip part to the inner peripheral surface of the branch pipe part in a sealed state, the sealing performance between the tip part of the tube outer tube part of the bush and the inner peripheral surface of the branch pipe part is insufficient. Thus, there is a risk that fluid may enter between the joint surfaces of the outer peripheral surface of the rehabilitation pipe and the inner peripheral surface of the fluid pipe.

  Therefore, conventionally, the tube outer tube portion of the bush is bulged to an outer diameter that is larger than the diameter of the branch port and smaller than the inner diameter of the branch tube portion, and this bulged tube The annular groove formed on the outer peripheral surface of the outer cylindrical portion is fitted with an elastic seal material that contacts the inner peripheral surface of the branch pipe portion in a compressed state and seals between the inner peripheral surface of the branch pipe portion. Has been.

  After the above bushing is inserted into the branch port of the rehabilitation pipe, the inner end of the bushing projecting to the inner peripheral surface side of the rehabilitation pipe is bent and formed on the outer diameter side of the branching port by means of a diameter expansion means. The end portion on the inner side of the pipe formed by bending is engaged with the opening peripheral edge of the branch port (see, for example, FIG. 10 of Patent Document 1 and Example 3).

JP 2012-180889 A

In the conventional fluid pipe branch structure, it is necessary to bulge and form the tube outer tube portion of the bush to an outer diameter larger than the diameter of the branch port. The annular groove formed on the outer peripheral surface of the cylindrical portion needs to be equipped with an elastic seal material that seals between the outer peripheral surface of the upper end of the large diameter of the bush and the inner peripheral surface of the branch pipe portion. Manufacturing costs increase.
In addition, since the elastic seal member mounted in the annular groove of the bush is slidably inserted along the inner peripheral surface of the branch pipe portion in a compressed state, much work is required for mounting the bush.

  In view of this situation, the main problem of the present invention is that the predetermined covering treatment work is simplified and the mounting work is performed even under the condition that there is a step between the inner peripheral surface of the branch pipe part and the branch port of the rehabilitation pipe. It is in the point of providing the branch part structure of the fluid pipe | tube which can be performed reliably, aiming at the simplification of this.

According to a first characteristic configuration of the present invention, a branch port having a smaller diameter than the inner diameter of the branch pipe portion is provided at a branch formation portion of the rehabilitation pipe formed by the lining process on the inner peripheral surface of the fluid pipe provided with the branch pipe portion. A coated cylindrical body that is formed to penetrate and covers the inner peripheral surface of the branch port in the rehabilitated pipe in a state that prevents fluid from entering between the joint surfaces of the outer peripheral surface of the rehabilitated pipe and the inner peripheral surface of the fluid pipe Is a branch structure of a fluid pipe that is mounted by diameter expansion deformation,
Of the outer peripheral surface of the rehabilitating pipe, the outer peripheral surface portion located at the step portion between the opening peripheral edge of the branch port and the inner peripheral surface of the branch pipe portion is the same as or substantially the same as the diameter of the branch port. A covering mounting ring portion having an inner diameter is arranged,
Inflow prevention means for preventing fluid from flowing in between the joint surfaces via a space between the outer peripheral surface of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion is provided,
The said covering cylindrical body is provided with the pipe | tube outer side cylinder part which protrudes in the branch downstream end part side of the said mounting | wearing ring part, and the pipe inner side cylinder part which protrudes in the inner peripheral surface side of the said renovation pipe | tube. In addition, the tube outer side tube portion and the tube inner side tube portion are each expanded and deformed outwardly in the diameter direction of the branch port in a retaining engagement state.

According to the above configuration, the covering mounting ring portion is disposed in the step portion between the opening peripheral edge of the branch port and the inner peripheral surface of the branch pipe portion on the outer peripheral surface of the rehabilitation pipe, and the covering mounting ring portion and the rehabilitation The coated cylindrical body is inserted into a predetermined mounting position with respect to the branch port of the pipe, and the coated cylindrical body is expanded and deformed by the diameter expanding means.
The tube inner side tube portion of the coated tubular body is expanded and deformed with the opening peripheral edge side of the branch port on the inner peripheral surface of the rehabilitated tube as a substantially bending start point, while the tube outer side tube portion of the covered tube body is Then, the diameter is deformed and expanded with the branch downstream end portion side of the covering mounting ring portion as a substantially bending start point.
Thereby, even if the covering cylindrical body is a simple cylindrical shape, it is possible to reliably cover the inner peripheral surface of the branch port and the inner peripheral surface of the covering mounting ring portion, and by the inflow prevention means, The fluid in the branch pipe flows between the joint surfaces of the outer peripheral surface of the rehabilitated pipe and the inner peripheral surface of the fluid pipe through the surface between the outer peripheral surface of the ring portion for covering and the inner peripheral surface of the branch pipe portion. It can be surely prevented.

  Therefore, by the above-described rational improvement in which the covering mounting ring portion is disposed in the step portion between the peripheral edge of the opening of the branch port and the inner peripheral surface of the branch pipe portion on the outer peripheral surface of the rehabilitation pipe, Even under conditions where there is a step between the inner peripheral surface and the opening peripheral edge of the branch port of the rehabilitation pipe, it is possible to reliably perform a predetermined covering treatment work while simplifying the structure and facilitating the mounting work. .

  According to a second characteristic configuration of the present invention, the coated cylindrical body includes a hard coated cylindrical main body, and at least a branch port of the rehabilitating pipe and the covering mounting ring portion on an outer peripheral surface of the coated cylindrical main body. And an elastic layer formed at a corresponding site.

  According to the above configuration, the coated cylindrical body is securely attached to the branch port of the rehabilitating pipe and the covering mounting ring portion in the retaining engagement state by the diameter expansion deformation of the hard coated cylindrical main body constituting the coated cylindrical body. Can be installed. In addition, the elastic layer formed on the outer peripheral surface of the coated cylindrical main body in close contact with the inner peripheral surface of the branch port of the rehabilitating pipe and the inner peripheral surface of the covering mounting ring portion as the diameter of the coated cylindrical main body increases. The sealing performance by the coated cylindrical body can be improved.

  A third characteristic configuration according to the present invention is that an adhesive layer is formed at least on the outer peripheral surface of the coated tubular body corresponding to the branch port of the rehabilitating pipe and the covering mounting ring portion.

  According to the above configuration, when the coated cylindrical body is expanded and deformed, the adhesive layer formed on the outer peripheral surface of the coated cylindrical body is the inner peripheral surface of the branch port of the rehabilitation pipe and the inner peripheral surface of the covering mounting ring portion. It can be strongly adhered to and the sealing performance by the coated cylindrical body can be enhanced.

According to a fourth characteristic configuration of the present invention, a branch port having a diameter smaller than the inner diameter of the branch pipe portion is provided at a branch formation portion of the rehabilitation pipe formed by the lining process on the inner peripheral surface of the fluid pipe provided with the branch pipe portion. A coated cylindrical body that is formed to penetrate and covers the inner peripheral surface of the branch port in the rehabilitated pipe in a state that prevents fluid from entering between the joint surfaces of the outer peripheral surface of the rehabilitated pipe and the inner peripheral surface of the fluid pipe Is a branch structure of a fluid pipe that is mounted by diameter expansion deformation,
A ring portion for covering attachment is disposed at a step portion between an opening peripheral portion of the branch port and an inner peripheral surface of the branch pipe portion on the outer peripheral surface of the rehabilitation pipe,
Inflow prevention means for preventing fluid from flowing in between the joint surfaces via a space between the outer peripheral surface of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion is provided,
A tube outer side cylindrical portion protruding toward the branch downstream end side of the covering mounting ring portion and a tube inner side cylindrical portion protruding toward the inner peripheral surface side of the rehabilitated tube in the covering cylindrical body are respectively engaged with retaining. In the state, the diameter is expanded and deformed outward in the radial direction of the branch port,
The inflow blocking means is composed of a sealing material that seals between the outer peripheral surface of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion.

  According to the above configuration, the inflow blocking means is, for example, compared to a case where the covering tubular body is formed of a welded portion that welds the entire circumference of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion. While facilitating the mounting operation, it is possible to easily and reliably seal between the outer peripheral surface of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion.

According to a fifth characteristic configuration of the present invention, a branch port having a diameter smaller than the inner diameter of the branch pipe portion is provided at a branch formation portion of the rehabilitation pipe formed by lining on the inner peripheral surface of the fluid pipe provided with the branch pipe portion. A coated cylindrical body that is formed to penetrate and covers the inner peripheral surface of the branch port in the rehabilitated pipe in a state that prevents fluid from entering between the joint surfaces of the outer peripheral surface of the rehabilitated pipe and the inner peripheral surface of the fluid pipe Is a branch structure of a fluid pipe that is mounted by diameter expansion deformation,
A ring portion for covering attachment is disposed at a step portion between an opening peripheral portion of the branch port and an inner peripheral surface of the branch pipe portion on the outer peripheral surface of the rehabilitation pipe,
Inflow prevention means for preventing fluid from flowing in between the joint surfaces via a space between the outer peripheral surface of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion is provided,
A tube outer side cylindrical portion protruding toward the branch downstream end side of the covering mounting ring portion and a tube inner side cylindrical portion protruding toward the inner peripheral surface side of the rehabilitated tube in the covering cylindrical body are respectively engaged with retaining. In the state, the diameter is expanded and deformed outward in the radial direction of the branch port,
The coating mounting ring portion is formed at a tip portion of a rust prevention sleeve that covers the rust prevention target region of the inner peripheral surface of the branch pipe portion, and the inflow prevention means is configured with the rust prevention sleeve. is there.

According to the above configuration, when the attachment of the rust prevention sleeve for rust prevention treatment of the rust prevention target area on the inner peripheral surface of the branch pipe portion is completed, the covering mounting ring portion formed at the tip of the rust prevention sleeve Can be securely fixed at a predetermined position of the step portion on the outer peripheral surface of the rehabilitation pipe.
In addition, by utilizing the sealing function of the rust prevention sleeve, the fluid in the branch pipe portion passes between the outer peripheral surface of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion and the outer peripheral surface of the rehabilitation pipe. Inflow between the joint surfaces with the inner peripheral surface of the fluid pipe can be reliably prevented, and simplification of the inflow prevention means can be achieved.

According to a sixth characteristic configuration of the present invention, a branch port having a smaller diameter than the inner diameter of the branch pipe portion is provided at a branch formation portion of the rehabilitation pipe formed by lining processing on the inner peripheral surface of the fluid pipe provided with the branch pipe portion. A coated cylindrical body that is formed to penetrate and covers the inner peripheral surface of the branch port in the rehabilitated pipe in a state that prevents fluid from entering between the joint surfaces of the outer peripheral surface of the rehabilitated pipe and the inner peripheral surface of the fluid pipe Is a branch structure of a fluid pipe that is mounted by diameter expansion deformation,
A ring portion for covering attachment is disposed at a step portion between an opening peripheral portion of the branch port and an inner peripheral surface of the branch pipe portion on the outer peripheral surface of the rehabilitation pipe,
Inflow prevention means for preventing fluid from flowing in between the joint surfaces via a space between the outer peripheral surface of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion is provided,
A tube outer side cylindrical portion protruding toward the branch downstream end side of the covering mounting ring portion and a tube inner side cylindrical portion protruding toward the inner peripheral surface side of the rehabilitated tube in the covering cylindrical body are respectively engaged with retaining. In the state, the diameter is expanded and deformed outward in the radial direction of the branch port,
The coating mounting ring portion is formed with a thin film that closes the branch flow path in a state of being continuous with the inner peripheral surface of the fluid pipe, and that is simultaneously cut and separated when the branch port of the rehabilitation pipe is formed. There is in point.

According to the above configuration, when forming the rehabilitation pipe with the lining material on the inner peripheral surface of the fluid pipe, the stepped portion between the opening peripheral edge of the branch port and the inner peripheral surface of the branch pipe part on the outer peripheral surface of the rehabilitation pipe By disposing the coating mounting ring portion on the inlet, the thin film formed on the coating mounting ring portion closes the inlet of the branch flow path in a state where the thin film is continuous with the inner peripheral surface of the fluid pipe. It is possible to prevent the lining material and adhesive from floating on the road.
Nevertheless, when the perforation is formed at the branch port, the thin film formed on the covering mounting ring portion can be cut and separated at the same time, so that no special removal work for the thin film is required.

According to a seventh characteristic configuration of the present invention, a reinforcing core that suppresses deformation of the covered tubular body due to relative movement between the fluid pipe and the rehabilitated pipe is fixed on the inner peripheral surface of the covered tubular body. It is in the point where it is inserted and arranged in the state.

  According to the above configuration, the relative moving force between the fluid pipe and the rehabilitation pipe caused by the difference in expansion and contraction of the outside air temperature change due to the difference in thermal expansion coefficient between the fluid pipe and the rehabilitation pipe, in particular, the joint part of the fluid pipe is caused by the ground fluctuation. Inserted between the inner peripheral surface of the branch port of the rehabilitation tube and the inner peripheral surface of the ring portion for covering by the relative movement force between the fluid tube and the rehabilitation tube generated by bending or stretching Even if a deforming force is applied to the coated cylindrical body, it is possible to suppress the deformation by the reinforcing core inserted and arranged on the inner peripheral surface of the coated cylindrical body. The part can be maintained in a concentric state.

According to an eighth characteristic configuration of the present invention, a branch port having a diameter smaller than the inner diameter of the branch pipe portion is formed at a branch formation portion of the rehabilitation pipe formed by the lining process on the inner peripheral surface of the fluid pipe provided with the branch pipe portion. A coated cylindrical body that is formed to penetrate and covers the inner peripheral surface of the branch port in the rehabilitated pipe in a state that prevents fluid from entering between the joint surfaces of the outer peripheral surface of the rehabilitated pipe and the inner peripheral surface of the fluid pipe Is a branch structure of a fluid pipe that is mounted by diameter expansion deformation,
A ring portion for covering attachment is disposed at a step portion between an opening peripheral portion of the branch port and an inner peripheral surface of the branch pipe portion on the outer peripheral surface of the rehabilitation pipe,
Inflow prevention means for preventing fluid from flowing in between the joint surfaces via a space between the outer peripheral surface of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion is provided,
A tube outer side cylindrical portion protruding toward the branch downstream end side of the covering mounting ring portion and a tube inner side cylindrical portion protruding toward the inner peripheral surface side of the rehabilitated tube in the covering cylindrical body are respectively engaged with retaining. In the state, the diameter is expanded and deformed outward in the radial direction of the branch port,
The covering mounting ring portion is provided with a reinforcing cylinder that is inserted and arranged on the inner peripheral surface of the branch port in the rehabilitation pipe.

  According to the above configuration, in the state where the covering mounting ring portion is disposed in the stepped portion between the opening peripheral edge of the branch port and the inner peripheral surface of the branch pipe portion on the outer peripheral surface of the rehabilitation pipe, this covering mounting ring Since the reinforcing cylinder provided in the section is inserted and arranged on the inner peripheral surface of the branch port, it is possible to suppress the deformation of the branch port of the rehabilitating pipe at the time of diameter expansion deformation of the tube inner side cylinder part of the coated cylindrical body it can. Moreover, the relative moving force between the fluid pipe and the rehabilitation pipe caused by the difference in expansion and contraction of the outside air temperature change due to the difference in coefficient of thermal expansion between the fluid pipe and the rehabilitation pipe, especially the joint part of the fluid pipe bends or expands due to ground fluctuation. The misalignment between the branch port of the rehabilitated pipe and the branch pipe part due to the relative movement force between the fluid pipe and the rehabilitated pipe that is generated due to the fact that it is caused can be suppressed.

Wherein the branching point of the branch pipe portion rehabilitating pipe formed by lined on the inner peripheral surface of the fluid tube having a small diameter of the branch port than the inner diameter of the branch pipe portion is formed through, the outer periphery of the rehabilitating pipe A fluid pipe mounted with a coated cylindrical body that covers the inner peripheral surface of the branch port in the rehabilitation pipe in a state that prevents the intrusion of fluid between the joint surface between the surface and the inner peripheral surface of the fluid pipe A bifurcation structure,
A rust prevention sleeve that covers the rust prevention target region on the inner peripheral surface of the branch pipe portion is provided, and the coated cylindrical body is provided at the tip of the rust prevention sleeve .

According to the above configuration, a relatively large level difference corresponding to the difference between the diameter of the branch port and the inner diameter of the branch pipe portion is generated between the opening peripheral edge of the branch port of the rehabilitation pipe and the inner peripheral surface of the branch pipe portion. Even when the rust prevention sleeve that covers the rust prevention target area of the inner peripheral surface of the branch pipe portion is attached, the coated cylindrical body formed at the tip of the rust prevention sleeve is removed from the predetermined branch port. It can be inserted and placed in the mounting position.
For this reason, the rust preventive sleeve and the coated cylindrical body can be secured in the branch pipe section only by covering the inner circumferential surface of the branched port with the coated cylindrical body inserted and arranged at the branch port of the rehabilitation pipe. Can be installed.
Moreover, by utilizing the sealing function of the rust preventive sleeve, the fluid in the branch pipe portion passes between the outer peripheral surface of the coated tubular body and the inner peripheral surface of the branch pipe portion and the outer peripheral surface of the rehabilitated pipe and the fluid. It can prevent reliably flowing in between the joint surfaces with the internal peripheral surface of a pipe | tube.

  Therefore, with a reasonable improvement that a coated cylindrical body is provided at the tip of the rust prevention sleeve, even if there is a step between the inner peripheral surface of the branch pipe part and the branch port of the rehabilitation pipe, a predetermined coating treatment is performed. The work can be reliably performed while simplifying the structure and facilitating the mounting work.

Sectional drawing of the branch part structure of 1st Embodiment Sectional drawing at the time of rehabilitation pipe formation work of a 1st embodiment Sectional drawing at the time of drilling work of 1st Embodiment Sectional drawing at the time of diameter expansion work of 1st Embodiment Sectional view when mounting the valve of the first embodiment Sectional drawing of the branch part structure of 2nd Embodiment Sectional drawing of the branch part structure of 3rd Embodiment Sectional drawing of the branch part structure of 4th Embodiment Sectional drawing of the branched part structure of 5th Embodiment Sectional drawing of branch part structure of 6th Embodiment Sectional drawing of branch part structure of 7th Embodiment Sectional drawing of branch part structure of 8th Embodiment Sectional drawing of branch part structure of 9th Embodiment Sectional drawing of the branched part structure of 10th Embodiment Sectional drawing of branch part structure of 11th Embodiment Sectional drawing before diameter expansion of the branch part structure of 12th Embodiment Sectional drawing after diameter expansion of the bifurcation structure of the twelfth embodiment Sectional drawing before diameter expansion of the branch part structure of 13th Embodiment Sectional drawing after diameter expansion of the branched structure of the thirteenth embodiment Sectional drawing of branch part structure of 14th Embodiment Sectional view at the time of insertion of the rust prevention sleeve of the fourteenth embodiment Sectional drawing at the time of diameter expansion work of 14th Embodiment Sectional drawing of branch part structure of 15th Embodiment Sectional view before assembly of the fifteenth embodiment Sectional drawing at the time of attachment work of 15th Embodiment Sectional drawing at the time of attachment work of 16th Embodiment Sectional drawing of branch part structure of 17th Embodiment Sectional view before assembly of the seventeenth embodiment Sectional view before tightening operation of the seventeenth embodiment

[First Embodiment]
1 to 5 illustrate a branch projecting outward along a branch axis that intersects (orthogonally in the present embodiment) a pipe axis of the water pipe 1 with a water pipe 1 that is an example of a fluid pipe. The branch part structure in which the pipe part 2 is integrally formed is shown.
In this bifurcation structure, a tubular lining material impregnated or coated with a thermosetting resin is inverted and inserted into the water pipe 1 in the rehabilitation target area in a water-stopped state, and steam heating or hot water heating, room temperature curing, etc. The rehabilitation pipe 3 is integrally formed on the inner peripheral surface 1a of the water pipe 1 in a close contact state by a lining treatment (hose lining method) for curing the thermosetting resin of the lining material.

A branch port 5 having a smaller diameter than the inner diameter of the branch pipe part 2 is formed in a portion corresponding to the branch flow path 4 of the branch pipe part 2 in the rehabilitated pipe 3, and the branch port in the outer peripheral surface 3 b of the rehabilitated pipe 3 is formed. A stepped portion 6 corresponding to the difference between the diameter of the branch port 5 and the inner diameter of the branch tube portion 2 is formed between the peripheral edge portion of the opening 5 and the inner peripheral surface 2 a of the branch tube portion 2.
The step portion 6 on the outer peripheral surface 3b of the rehabilitated pipe 3 has a diametrical thickness corresponding to the difference between the diameter of the branch port 5 and the inner diameter of the branch pipe portion 2, and from the outer peripheral surface 3b of the rehabilitated pipe 3 A metal covering / mounting ring portion 7 having a height up to the straight tubular portion of the inner peripheral surface 2a of the branch pipe portion 2 is disposed.

  The outer peripheral surface 7b side of the branch downstream side end portion 7c of the covering mounting ring portion 7 is fixed to the inner peripheral surface 2a of the branch pipe portion 2 in a water-tight state by all-around welding. The clean water (fluid) in the flow path 4 passes between the opposed surfaces of the outer peripheral surface 7b of the covering mounting ring portion 7 and the inner peripheral surface 2a of the branch pipe portion 2, and the outer peripheral surface 3b of the renovated pipe 3 and the water supply An inflow prevention means 13 (see FIG. 5) is configured to prevent entry between the joint surfaces of the pipe 1 and the inner peripheral surface 1a.

The diameter of the branch port 5 of the rehabilitation pipe 3 and the inner diameter of the covering mounting ring portion 7 are the same or substantially the same, and the inner peripheral surface 5a of the branch port 5 and the inner peripheral surface 7a of the covering mounting ring portion 7 are formed. It is continuously formed in a concentric state.
Over the inner peripheral surface 5 a of the branch port 5 and the inner peripheral surface 7 a of the covering mounting ring portion 7, the upper surface between the outer peripheral surface 3 b of the renovated pipe 3 and the inner peripheral surface 1 a of the water pipe 1 An example of a coated cylindrical body 8 that covers the inner peripheral surface 5a of the branch port 5 of the rehabilitation pipe 3 in a state where water intrusion is blocked, and in the direction of the branch axis between the cover mounting ring portion 7 and the branch port 5 A metal bush 9 having a length in the branch axis direction larger than the total length is inserted and arranged.

  The bush 9 is inserted into the set insertion position, and in the state where it is inserted and arranged, the tube outer side cylindrical portion 9a protruding downstream from the branch downstream side end portion 7c of the covering mounting ring portion 7 and the inner periphery of the branch port 5 The tube side of the water pipe 1 from the opening peripheral portion of the branch port 5 on the inner peripheral surface 3a of the rehabilitating pipe 3 and the intermediate side cylindrical portion 9b facing the surface 5a and the inner peripheral surface 7a of the covering mounting ring portion 7 It is comprised from the pipe inner side cylinder part 9c which protrudes in this.

  The bush 9 is made of a metal (stainless steel, copper alloy, etc.), which is a hard coated cylindrical main body, and at least the branch port 5 of the rehabilitating pipe 3 on the outer peripheral surface of the bush main body 9A and for covering attachment. It consists of a rubber elastic layer 9B formed in a portion corresponding to the ring portion 7 (in this embodiment, substantially the entire outer peripheral surface of the bush main body 9A). When the bush 9 is inserted, the elastic layer 9B has an outer peripheral surface. The adhesive layer 10 is formed by applying an adhesive.

  When the bush 9 inserted and arranged across the inner peripheral surface 5a of the branch port 5 and the inner peripheral surface 7a of the covering mounting ring portion 7 is expanded and deformed by the diameter-enlarging means A1, the inner side of the bush 9 The cylindrical portion 9c is expanded and deformed with the opening peripheral edge side of the branch port 5 on the inner peripheral surface 3a of the rehabilitation pipe 3 as a substantially bending start point (bend deformation on the radially outer side of the branch port 5), while the bush 9 The tube outer side tubular portion 9a is subjected to diameter expansion deformation (bending deformation toward the radially outer side of the branch port 5) with the branch downstream end portion 7c side of the covering mounting ring portion 7 as a substantially bending start point.

  The elastic layer 9B formed on the outer peripheral surface of the bush main body 9A in accordance with the expansion of the diameter of the bush main body 9A of the bush 9 is the inner peripheral surface 5a of the branch port 5 of the rehabilitation pipe 3 and the inner periphery of the covering mounting ring portion 7. The adhesive layer 10 which is in close contact with the surface 7a in a pressure contact state and is formed on the outer peripheral surface of the elastic layer 9B is attached to the inner peripheral surface 5a of the branch port 5 of the rehabilitation pipe 3 and the inner peripheral surface 7a of the covering mounting ring portion 7. Since it adheres strongly, the sealing performance (rust prevention and antiseptic properties due to watertightness) by the bush 9 can be enhanced.

Next, the construction method of the branch part structure of the water pipe 1 comprised as mentioned above is demonstrated.
As shown in FIGS. 2 and 3, the cover mounting ring portion 7 used in the branch portion structure closes the inlet of the branch flow channel 4 in a state of being flush with the inner peripheral surface 1 a of the water pipe 1. In addition, a thin film 11 made of metal or resin that is simultaneously cut and separated when the perforation of the branch port 5 of the rehabilitation pipe 3 is formed.

Therefore, as shown in FIG. 2, the tubular lining material is reversely inserted in a state where the thermosetting resin is impregnated or applied into the rehabilitation target region of the water pipe 1 that has been cleaned in the water-off state, and steam heating or hot water is used. When performing a lining process for curing the resin by heating, curing at room temperature, etc., the covering attachment ring portion 7 is fixed to the inner peripheral surface 2a of the branch pipe portion 2 by all-around welding, and the covering attachment ring portion 7 is a thin film. An attachment flange 15A of a thin film pressing jig 15 that abuts the outer surface side of the thin film 11 and maintains the thin film 11 in a predetermined posture against the pressure at the time of lining processing is attached to the flange 2A of the branch pipe portion 2 with bolts 16A and nuts 16B. It fixes with the fasteners 16, such as.
During the lining process, the thin film 11 of the covering mounting ring portion 7 can prevent the cylindrical lining material and the adhesive from being lifted at the entrance of the branch channel 4 of the water pipe 1.

When the construction of the rehabilitating pipe 3 by the lining process is completed, as shown in FIG. 3, the process proceeds to a perforating process for forming the branch port 5 in the rehabilitating pipe 3.
In this drilling step, a drilling device is provided with a cylindrical hole saw 17 that cuts and forms the branch port 5 on the flange 2A of the branch pipe portion 2, and a center drill 18 that protrudes forward from the rotational center position in the hole saw 17. The connection flange 19 of B is fixedly connected by a fastener 16 such as a bolt 16A and a nut 16B, and the hole saw 17 is fed along the branch flow path 4 to form the branch port 5 in the renovated pipe 3.
At this time, the thin film 11 bonded and fixed to the outer peripheral surface 3 b of the rehabilitation pipe 3 is also cut and separated by the hole saw 17. The section 3c and the thin film 11 of the rehabilitated tube 3 that has been cut and separated are retained by using the locking function of the center drill 18.

When the drilling process is completed, the process proceeds to the bushing 9 mounting process as shown in FIG.
In this bush mounting step, the bush 9 having the adhesive applied to the outer peripheral surface of the elastic layer 9B is externally held in the diameter-enlarging means A1 of the bush mounting device A in a retaining state, and the connecting flange 25 of the bush mounting device A is retained. Is fixed to the flange 2A of the branch pipe portion 2 with a fastener 16 such as a bolt 16A and a nut 16B.

As the bush mounting device A having the diameter expanding means A1, various forms have been developed conventionally, and any form thereof can be used.
In this embodiment, the elastic body-expandable bush mounting device A is used, and the diameter-expanding means A1 equipped on the bush-mounting apparatus A is an inner operation shaft having an inner / outer double shaft structure that can be relatively moved along the branch axis direction. 20 and the outer operation shaft 21 are provided with pressing portions 22 and 23 having pressing surfaces 22a and 23a facing each other in the axial direction (branch axis direction), and between the pressing portions 22 and 23. A diameter-expanding elastic body 24 is provided that expands and deforms the bush 9 by expanding radially outward along with the relative proximity movement.

  The bushing 9 is externally mounted on the diameter-expanding elastic body 24 in the axial direction, and the diameter-expanding elasticity is set at a setting mounting position where one end of the bush 9 is in contact with the pressing surface 23a of the pressing portion 23 on the outer operation shaft 21 side. The body 24 is slightly expanded and the bush 9 is retained.

Then, the diameter-enlarging means A1 of the bush mounting device A is fed along the branch flow path 4 and the bush 9 is disposed at a set mounting position with respect to the covering mounting ring portion 7 and the branch port 5.
In the state in which the bush 9 is disposed at the set mounting position, the tube outer side tubular portion 9a of the bush 9 projects a set length toward the branch downstream side from the branch downstream side end portion 7c of the covering mounting ring portion 7, and the bush 9 The inner tube side tube portion 9 c protrudes from the peripheral edge portion of the branch port 5 on the inner circumferential surface 3 a of the rehabilitated tube 3 to the tube axis side of the water pipe 1 by a set length.

  In this state, when both the pressing portions 22 and 23 are operated relatively close to each other and the diameter-enlarging elastic body 24 is expanded radially outward, the tube inner tube portion 9c of the bush 9 is rehabilitated as shown in FIG. The tube 3 is bent and deformed outwardly in the radial direction of the branch port 5 with the opening peripheral edge side of the branch port 5 on the inner peripheral surface 3a of the tube 3 as a substantially bending starting point. The mounting ring portion 7 is bent and deformed outwardly in the diametrical direction of the branch port 5 with the branch downstream side end portion 7c side as a substantially bending start point.

  As a result, the bush 9 has its elastic layer 9B in close contact with the inner peripheral surface 5a of the branch port 5 of the rehabilitating pipe 3 and the inner peripheral surface 7a of the covering mounting ring portion 7, and the elastic layer 9B. The adhesive layer 10 formed on the outer peripheral surface is engaged and mounted in a state of being strongly bonded to the inner peripheral surface 5a of the branch port 5 of the rehabilitation pipe 3 and the inner peripheral surface 7a of the covering mounting ring portion 7.

  In the state where the bush 9 is engaged and mounted, the intrusion of clean water between the opposed surfaces of the outer peripheral surface 7b of the covering mounting ring portion 7 and the inner peripheral surface 2a of the branch pipe portion 2 is caused by the aforementioned all-round welded portion 12. Intrusion of clean water between the joint surface between the inner peripheral surface 7a of the covering mounting ring portion 7 and the outer peripheral surface of the bush 9 is blocked by the pressure contact of the elastic layer 9B. It is blocked by the adhesion of the adhesive layer 10. Further, intrusion of clean water between the joint surfaces of the inner peripheral surface 5 a of the branch port 5 and the outer peripheral surface of the bush 9 is prevented by the above-described pressure contact of the elastic layer 9 </ b> B and adhesion of the adhesive layer 10.

When the bush 9 is engaged and mounted, both the pressing portions 22 and 23 are operated to be relatively separated to reduce the diameter of the diameter-enlarging elastic body 24, and the bush mounting device A is removed from the flange 2 A of the branch pipe portion 2.
When the bush mounting process is completed, as shown in FIG. 5, in this embodiment, the flange 26 </ b> A of the valve (repair valve) 26, which is an example of water supply equipment (fluid equipment), is bolted to the flange 2 </ b> A of the branch pipe portion 2. It is fixed with a fastener 16 such as 16A / nut 16B.

[Second Embodiment]
FIG. 6 shows another embodiment of the branch structure of the water pipe 1. In this embodiment, the outer peripheral surface 7b of the covering mounting ring portion 7 is directed radially outward in one or a plurality of locations (two locations in this embodiment) in the ring axis direction (also in the branch axis direction). An annular seal groove 28 is formed, and an O-ring 29, which is an example of a seal material that seals water tightly between the inner peripheral surface 2a of the branch pipe portion 2 is attached to the seal groove 28.

In the state where the bush 9 is engaged and mounted, the space between the outer peripheral surface 7b of the covering mounting ring portion 7 and the inner peripheral surface 2a of the branch pipe portion 2 is watertightly sealed with an O-ring 29, With this O-ring 29, the fresh water (fluid) in the branch flow path 4 passes through between the opposing surfaces of the outer peripheral surface 7b of the covering mounting ring portion 7 and the inner peripheral surface 2a of the branch pipe portion 2, and the rehabilitation pipe The inflow prevention means 13 is configured to prevent intrusion between the joint surfaces of the outer peripheral surface 3b of 3 and the inner peripheral surface 1a of the water pipe 1.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Third Embodiment]
FIG. 7 shows another embodiment of the branch structure of the water pipe 1. In this embodiment, the outer peripheral surface 7b of the covering mounting ring portion 7 is partitioned into a large-diameter outer peripheral surface 7ba and a small-diameter outer peripheral surface 7bb with the intermediate position in the ring axis direction as a boundary.
A male screw portion is formed on the small-diameter outer peripheral surface 7bb of the covering mounting ring portion 7. The male screw portion has an annular seal that opens radially outward from the end surface of the large-diameter outer peripheral surface 7ba. A screw member 31 that forms the groove 30 is screwed together.
As in the second embodiment, an O-ring 32 that is an example of a sealing material that seals water tightly between the inner peripheral surface 2 a of the branch pipe portion 2 is mounted in the seal groove 30. Blocking means 13 is configured.

  If the water tight function by the O-ring 32 is insufficient, when the screw member 31 is tightened to the side where the groove width of the seal groove 30 is reduced, the O-ring 32 is connected to the end surface of the large-diameter outer peripheral surface 7ba and the screw. The amount of bulging outward in the radial direction is increased between the members 31 and the water tight function by the O-ring 32 is enhanced.

In this embodiment, when the diameter expansion action of the bush 9 by the diameter expansion means A1 of the bush mounting apparatus A described in the first embodiment is insufficient, a link type bush mounting apparatus C is used.
The link type bush mounting device C includes a tube outer tube portion 9a of the bush 9 at the tip of the outer shaft 35 among the middle shaft 33, the intermediate shaft 34, and the outer shaft 35 constituting the inner / outer triple shaft structure. There is provided a pressing portion 35A having a pressing surface 35a for bending and deforming outwardly in the radial direction with the branch downstream side end portion 7c side of the covering mounting ring portion 7 as a substantially bending starting point.

  Further, the link operation provided on the outer threaded portion 33a of the intermediate shaft 33 extends over the link attachment portion 34A provided at the distal end of the intermediate shaft 34 and the link attachment tube 33A rotatably mounted on the distal end portion of the intermediate shaft 33. Due to the relative proximity movement between the link mounting portion 34A and the link mounting cylinder 33A accompanying the rotation operation of the nut 33B, the tension is applied while bending outward from the opening peripheral edge of the branch port 5 on the inner peripheral surface 3a of the rehabilitation pipe 3. A pair of hip-fold links 36 are provided.

  A plurality of screw shafts 37 linking the first connecting member 34C provided at the outer end portion of the intermediate shaft 34 and the second connecting member 35B provided at the outer end portion of the outer shaft 35 include a second connecting member 35B. The fixing nut 38 that clamps and fixes the side face of the first connecting member 34C that faces the second connecting member 35B, and presses the pressing portion 35A of the outer shaft 35 and the diameter expansion operation link portion of the waist folding link 36 that is in an overhanging posture. A diameter-enlarging operation nut 39 for relatively moving 36A is screwed together.

  When the waist folded link 36 reaches the set overhanging posture, a posture regulating nut 40 that fits into the recess of the link mounting portion 34A and prevents further bending of the waist folded link 36 is screwed to the inner threaded portion 33b of the middle shaft 33. Are combined.

When the diameter expansion operation nut 39 is operated in a state where the pair of waist folded links 36 is changed to the extended posture, the pressing portion 35A of the outer shaft 35 and the diameter enlarged operation link portion 36A of the waist folded link 36 in the extended posture are As a result of the relative proximity movement of the bush 9, the tube outer side cylinder portion 9 a and the tube inner side tube portion 9 c of the bush 9 are expanded in diameter, and the insufficient diameter expansion of the bush 9 is solved.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Fourth Embodiment]
FIG. 8 shows another embodiment of the branch structure of the water pipe 1. In this embodiment, a reinforcing core 41 made of metal (stainless steel, copper alloy, etc.) that suppresses deformation of the bush 9 is inserted and arranged on the inner peripheral surface of the bush 9 in a fixed position.
One end portion of the reinforcing core 41 is formed with a flange portion 41 a that contacts the branch downstream end portion of the bush 9.
In inserting and arranging the reinforcing core 41, the reinforcing core 41 is press-fitted into the bush 9 from the branch axis direction until the flange portion 41 a of the reinforcing core 41 contacts the branch downstream end of the bush 9. Yes.

  And the relative moving force of the water pipe 1 and the rehabilitation pipe 3 generated by the difference in expansion and contraction of the outside air temperature change due to the difference in the coefficient of thermal expansion between the water pipe 1 and the rehabilitation pipe 3, especially the joint part of the water pipe 1 due to the ground fluctuation Of the inner peripheral surface 5a of the branch port 5 of the rehabilitating pipe 3 and the ring portion 7 for covering attachment due to the relative moving force between the water pipe 1 and the rehabilitating pipe 3 generated due to the bending or stretching of the pipe Even if a deformation force acts on the bush 9 mounted over the peripheral surface 7a, the deformation of the bush 9 can be suppressed by the reinforcing core 41 inserted and arranged on the inner peripheral surface of the bush 9. The branch port 5 of the pipe 3 and the branch pipe part 2 can be maintained in a concentric state.

In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.
In the fourth embodiment described above, the reinforcing core 41 is press-fitted into the bush 9. However, the reinforcing core 41 may be screwed and inserted into the bush 9 by other fixing means such as welding.

[Fifth Embodiment]
FIG. 9 shows another embodiment of the branch structure of the water pipe 1. In this embodiment, the inner ring surface 42a of the anticorrosion sleeve 42 made of metal (stainless steel, copper alloy, etc.) is used to cover the anticorrosion target region of the entire inner peripheral surface of the branch pipe part 2 with the covering mounting ring part 7. Are integrally formed at the leading end of the branch upstream side.
Furthermore, with the rust prevention sleeve 42, the clean water (fluid) in the branch flow path 4 passes between the opposing surfaces of the outer peripheral surface 7b of the coating mounting ring portion 7 and the inner peripheral surface 2a of the branch pipe portion 2, An inflow blocking means 13 is configured to block entry between the outer peripheral surface 3b of the rehabilitation pipe 3 and the inner peripheral surface 1a of the water pipe 1.

The outer diameter of the rust prevention sleeve 42 is configured to be slightly smaller than the inner diameter of the branch pipe portion 2, and the inner diameter of the rust prevention sleeve 42 is configured to be larger than the diameter of the branch port 5.
A flange portion 42A that protrudes radially outward is integrally formed at the other end portion of the rust prevention sleeve 42 on the downstream side of the branch, and this flange portion 42A is an example of the flange 2A of the branch pipe portion 2 and water supply equipment. Between the plate flange 43 and the flange 26A of the valve (repair valve) 26, it is clamped and fixed in a watertight state with a sealing material interposed.

  In the present embodiment, the flange portion 42A of the anticorrosion sleeve 42 is held in a watertight state between the flange 2A of the branch pipe portion 2 and the plate flange 43 by the tightening and fixing operation by the fasteners 16 such as bolts 16A and nuts 16B. Further, the flange 26A of the valve 26 is fixedly connected to the plate flange 43 in a watertight state.

  Further, in this embodiment, in order to attach a gasket (packing) 47 which is an example of a sealing material, the diameter of the rust preventive sleeve 42 at the flange portion 42A is between the flange 2A of the branch pipe portion 2 and the plate flange 43. An outer ring 48 that forms an annular seal mounting groove between the annular outer peripheral edge portion on the outer side in the direction and a gasket 47 that is mounted in the seal mounting groove formed by the outer ring 48 are disposed, and a fastener The gasket 47 is compressed into a watertight state by the tightening and fixing operation by 16.

  Then, just by fixedly connecting the flange portion 42A of the rust prevention sleeve 42 to the flange 2A of the branch pipe portion 2, the covering mounting ring portion 7 is connected to the opening peripheral edge of the branch port 5 on the outer peripheral surface 3b of the rehabilitated pipe 3 and the branch pipe. It is reliably arranged in a fixed position at a predetermined position of the stepped portion 6 between the portion 2 and the inner peripheral surface 2a.

  The covering mounting ring portion 7 is formed to project radially inward from the tip portion of the rust prevention sleeve 42, and the inner diameter of the covering mounting ring portion 7 is the same as the diameter of the branch port 5 of the rehabilitation pipe 3 or It is comprised substantially the same.

Further, the bush 9 described in the first embodiment is engaged and mounted in the same mounting procedure on the inner peripheral surface 5a of the branch port 5 of the rehabilitation pipe 3 and the inner peripheral surface 7a of the covering mounting ring portion 7. Yes.
As a result, the bush 9 has its elastic layer 9B in close contact with the inner peripheral surface 5a of the branch port 5 of the rehabilitating pipe 3 and the inner peripheral surface 7a of the covering mounting ring portion 7, and the elastic layer 9B. The adhesive layer 10 formed on the outer peripheral surface is engaged and mounted in a state of being strongly bonded to the inner peripheral surface 5a of the branch port 5 of the rehabilitation pipe 3 and the inner peripheral surface 7a of the covering mounting ring portion 7.

In a state where the bush 9 is engaged and mounted, water is supplied between the opposed surfaces of the outer peripheral surface 42b of the rust prevention sleeve 42 and the inner peripheral surface 2a of the branch pipe portion 2 in which the covering mounting ring portion 7 is integrally formed. Is prevented by the seal portion at the connecting portion between the flange portion 42A of the rust prevention sleeve 42 and the flange 2A of the branch pipe portion 2, and the inner peripheral surface 7a of the covering mounting ring portion 7 and the outer peripheral surface of the bush 9 are Intrusion of clean water between the joint surfaces is prevented by the above-described pressure contact of the elastic layer 9 </ b> B and adhesion of the adhesive layer 10. Furthermore, intrusion of clean water between the joint surfaces of the inner peripheral surface 5 a of the branch port 5 and the outer peripheral surface of the bush 9 is prevented by the above-described pressure contact of the elastic layer 9 </ b> B and adhesion of the adhesive layer 10.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Sixth Embodiment]
FIG. 10 shows an embodiment of a modification of the branch structure of the water pipe 1 described in the fifth embodiment. In this embodiment, the inner circumferential surface 7a of the covering mounting ring portion 7 formed integrally with the rust prevention sleeve 42 is radially inward at one or more locations in the ring axis direction (also in the branch axis direction). An annular seal groove 45 that opens in the direction is formed, and an O-ring 46 that is an example of a seal material that seals water tightly with the outer peripheral surface of the bush 9 is attached to the seal groove 45.
In addition, since the other structure is the same as the structure demonstrated in 5th Embodiment, the same number is attached to the same component location as 5th Embodiment, and the description is abbreviate | omitted.

[Seventh Embodiment]
FIG. 11 shows an embodiment of a modification of the branch structure of the water pipe 1 described in the fifth embodiment. In this embodiment, the length of the rust preventive sleeve 42 in which the covering mounting ring portion 7 is integrally formed is the rust preventive except for a part of the inner peripheral surface 2a of the branch pipe portion 2 on the branch downstream end side. The length is configured to cover the target region, and the branch downstream end 42c of the rust prevention sleeve 42 is fixed to the inner peripheral surface 2a of the branch pipe portion 2 in a watertight state by all-around welding.
With this rust-proof sleeve 42 welded all around, the clean water (fluid) in the branch flow path 4 is between the opposing surfaces of the outer peripheral surface 7b of the covering mounting ring portion 7 and the inner peripheral surface 2a of the branch pipe portion 2. The inflow prevention means 13 is configured to prevent intrusion between the outer peripheral surface 3b of the rehabilitated pipe 3 and the inner peripheral surface 1a of the water pipe 1 via the.

Therefore, in a state where the bush 9 is engaged and mounted, the space between the outer peripheral surface 42b of the rust prevention sleeve 42 and the inner peripheral surface 2a of the branch pipe portion 2 in which the covering mounting ring portion 7 is integrally formed is formed. The intrusion of clean water is prevented at the welded portion between the branch downstream end portion 42c of the rust prevention sleeve 42 and the inner peripheral surface 2a of the branch pipe portion 2.
In addition, since the other structure is the same as the structure demonstrated in 5th Embodiment, the same number is attached to the same component location as 5th Embodiment, and the description is abbreviate | omitted.

[Eighth Embodiment]
FIG. 12 shows an embodiment of a modification of the branch structure of the water pipe 1 described in the fifth embodiment. In this embodiment, a reinforcing cylinder 7 </ b> A that is inserted and arranged on the inner peripheral surface 5 a of the branch port 5 in the rehabilitation pipe 3 is integrally formed on the covering mounting ring portion 7 that is integrally formed with the rust prevention sleeve 42.

Then, the reinforcing cylinder 7A provided in the covering mounting ring portion 7 is inserted and arranged in the inner peripheral surface 5a of the branch port 5, so that the rehabilitated pipe at the time of diameter expansion deformation of the tube inner side cylinder portion 9c of the bush 9 3 and the relative movement of the water pipe 1 and the rehabilitation pipe 3 caused by the difference in expansion and contraction of the outside air temperature due to the difference in thermal expansion coefficient between the water pipe 1 and the rehabilitation pipe 3. The branch port 5 and the branch of the rehabilitation pipe 3 due to the relative movement force between the water pipe 1 and the rehabilitation pipe 3 generated due to the force, in particular, the joint portion of the water pipe 1 bends or stretches due to ground fluctuation The misalignment with the pipe part 2 can be suppressed.
In addition, since the other structure is the same as the structure demonstrated in 5th Embodiment, the same number is attached to the same component location as 5th Embodiment, and the description is abbreviate | omitted.

[Ninth Embodiment]
FIG. 13 shows an embodiment of a modified example of the branch portion structure of the water pipe 1 described in the fifth embodiment. In this embodiment, a reinforcing core 41 made of metal (stainless steel, copper alloy, etc.) that suppresses deformation of the bush 9 is inserted and arranged on the inner peripheral surface of the bush 9 in a fixed position.
One end portion of the reinforcing core 41 is formed with a flange portion 41 a that contacts the branch downstream end portion of the bush 9.
In inserting and arranging the reinforcing core 41, the reinforcing core 41 is press-fitted into the bush 9 from the branch axis direction until the flange portion 41 a of the reinforcing core 41 contacts the branch downstream end of the bush 9. Yes.

  And the relative moving force of the water pipe 1 and the rehabilitation pipe 3 generated by the difference in expansion and contraction of the outside air temperature change due to the difference in the coefficient of thermal expansion between the water pipe 1 and the rehabilitation pipe 3, especially the joint part of the water pipe 1 due to the ground fluctuation Of the inner peripheral surface 5a of the branch port 5 of the rehabilitating pipe 3 and the ring portion 7 for covering attachment due to the relative moving force between the water pipe 1 and the rehabilitating pipe 3 generated due to the bending or stretching of the pipe Even if a deformation force acts on the bush 9 mounted over the peripheral surface 7a, the deformation of the bush 9 can be suppressed by the reinforcing core 41 inserted and arranged on the inner peripheral surface of the bush 9. The branch port 5 of the pipe 3 and the branch pipe part 2 can be maintained in a concentric state.

In addition, since the other structure is the same as the structure demonstrated in 5th Embodiment, the same number is attached to the same component location as 5th Embodiment, and the description is abbreviate | omitted.
In the above-described embodiment, the reinforcing core 41 is press-fitted into the bush 9. However, the reinforcing core 41 may be screwed and inserted into the bush 9 by other fixing means such as welding.

[Tenth embodiment]
FIG. 14 shows an embodiment of a modification of the branch structure of the water pipe 1 described in the ninth embodiment. In this embodiment, the length in the branch axis direction of the reinforcing core 41 is configured to be larger than the length in the branch axis direction of the branch pipe portion 2, and the flange portion 41 a of the reinforcing core 41 is formed of the branch pipe. It is configured to have an outer diameter that is sandwiched and fixed in a watertight state with a sealing material such as a gasket interposed between the flange 2A of the portion 2 and the plate flange 43 which is an example of water supply equipment or the flange 26A of the valve (repair valve) 26. ing.

  In the present embodiment, the flange portion 41a of the reinforcing core 41 is in a watertight state between the flange 2A of the branch pipe portion 2 and the flange 26A of the valve 26 by the fastening and fixing operation using the fasteners 16 such as bolts 16A and nuts 16B. It is fixed by holding.

Further, the length of the rust prevention sleeve 42 in which the covering mounting ring portion 7 is integrally formed is the rust prevention target region excluding a part of the inner peripheral surface 2a of the branch pipe portion 2 on the branch downstream end side. The branch downstream side end portion 42c of the rust prevention sleeve 42 is fixed to the inner peripheral surface 2a of the branch pipe portion 2 in a watertight state by full circumference welding.
In addition, since the other structure is the same as the structure demonstrated in 9th Embodiment, the same number is attached to the same component location as 9th Embodiment, and the description is abbreviate | omitted.

[Eleventh embodiment]
FIG. 15 shows an embodiment of a modification of the branch structure of the water pipe 1 described in the fifth embodiment. In this embodiment, since the branch port 5 having a diameter that is much smaller than the inner diameter of the branch pipe part 2 is formed in a portion corresponding to the branch flow path 4 of the branch pipe part 2, the outer peripheral surface of the rehabilitated pipe 3 A large step portion 6 is formed between the opening peripheral edge of the branch port 5 in 3 b and the inner peripheral surface 2 a of the branch pipe portion 2.

  The sleeve main body 42 </ b> B of the rust prevention sleeve 42 is configured to be smaller than the inner diameter of the branch pipe portion 2, and the inner peripheral surface 7 a of the covering mounting ring portion 7 formed integrally with the rust prevention sleeve 42 is formed on the branch port 5. The inner diameter can be continuously arranged on the inner peripheral surface 5a.

  Therefore, between the outer peripheral surface 42b of the sleeve main body 42B of the rust prevention sleeve 42 and the inner peripheral surface 2a of the branch pipe portion 2, and the outer peripheral surface 7b of the covering mounting ring portion 7 and the inner peripheral surface 2a of the branch pipe portion 2. A relatively large annular space is formed between them, but the arrangement position of the covering mounting ring portion 7 is fixed and maintained by the rigidity of the rust preventive sleeve 42.

  That is, also in this embodiment, the cover mounting ring portion 7 can be connected to the branch port 5 on the outer peripheral surface 3b of the rehabilitated tube 3 only by fixedly connecting the flange portion 42A of the rust prevention sleeve 42 to the flange 2A of the branch tube portion 2. It is surely arranged in a fixed position at a predetermined position of the step portion 6 between the opening peripheral portion of the opening and the inner peripheral surface 2 a of the branch pipe portion 2.

Moreover, the intermediate part or the whole of the sleeve main body 42B of the rust prevention sleeve 42 is configured in a bellows shape (bellows shape) whose length can be adjusted.
In addition, since the other structure is the same as the structure demonstrated in 5th Embodiment, the same number is attached to the same component location as 5th Embodiment, and the description is abbreviate | omitted.

[Twelfth embodiment]
16 and 17 show another embodiment of the branch portion structure of the water pipe 1 in the above-described fifth embodiment. In this embodiment, on the downstream downstream end of the rust prevention sleeve 42 made of metal (stainless steel, copper alloy, etc.) covering the rust prevention target region on the entire inner peripheral surface of the branch pipe portion 2, radially outward. A protruding flange portion 42A is integrally formed, and this flange portion 42A is formed between a flange 2A of the branch pipe portion 2 and a plate flange 43 which is an example of water supply equipment or a flange 26A of a valve (repair valve) 26. It is held and fixed in a watertight state with a sealing material interposed.

  In the present embodiment, the flange portion 42A of the anticorrosion sleeve 42 is held in a watertight state between the flange 2A of the branch pipe portion 2 and the plate flange 43 by the tightening and fixing operation by the fasteners 16 such as bolts 16A and nuts 16B. It is fixed.

  And the penetration | invasion of the clean water between the outer peripheral surface 3b of the renovated pipe 3 and the internal peripheral surface 1a of the water pipe 1 is blocked | prevented in the front-end | tip of the branch upstream in the inner peripheral surface 42a of the antirust sleeve 42 In the state, the covered cylindrical body 8 that covers the inner peripheral surface 5a of the branch port 5 in the rehabilitation pipe 3 is integrally formed in a state of protruding inward in the radial direction.

On the outer peripheral surface 8 b of the coated tubular body 8, the stepped portion 6 and the branch port 5 between the opening peripheral edge of the branch port 5 and the inner peripheral surface 2 a of the branch pipe portion 2 in the outer peripheral surface 3 b of the rehabilitation pipe 3 are provided. A mounting surface 8c having an L-shaped cross section facing the inner peripheral surface 5a is formed. The mounting surface 8c has a stepped portion 6 and a branch port from the branch upstream end of the inner peripheral surface 2a of the branch pipe portion 2. A cylindrical elastic sealing material 50 capable of watertightly sealing a range from the inner peripheral surface 5a of the regenerator pipe 3 to the opening peripheral portion of the branch port 5 in the inner peripheral surface 3a of the rehabilitation pipe 3 is fixed.
The branch upstream side end portion 50 a of the elastic sealing material 50 is formed so as to protrude from the inner peripheral surface 3 a of the rehabilitation pipe 3 toward the pipe core side of the water pipe 1.

  On the inner peripheral surface 8a of the coated tubular body 8, the inner peripheral surface 3a of the rehabilitating pipe 3 protrudes toward the pipe core side of the water pipe 1, and the diametrically outward side of the branch port 5 by the diameter expanding means A1. A thin-walled diameter-expanded cylindrical portion 8A that can be expanded and deformed is integrally formed, and an opening of the branch port 5 in the inner peripheral surface 3a of the rehabilitated pipe 3 is formed at the branch upstream end of the coated tubular body 8. An enlarged-diameter guide inclined surface 8d that extends conically toward the peripheral edge is formed.

  As shown in FIG. 17, when the diameter-enlarging cylindrical portion 8 </ b> A of the coated cylindrical body 8 is expanded and deformed by the diameter-enlarging means A <b> 1, the diameter-enlarged cylindrical portion 8 </ b> A The outer diameter guide inclined surface 8d is bent in the outer radial direction, and further, the distal end side of the enlarged diameter guide inclined surface 8d is bent substantially outward from the outer diameter in the radial direction. The upstream end portion 50a of the branch is pressure-bonded in a watertight state to the opening peripheral portion of the branch port 5 in the inner peripheral surface 3a of the rehabilitation pipe 3.

  In a state in which the diameter-enlarged cylinder portion 8A of the coated tubular body 8 is expanded and deformed, the diameter-enlarged cylinder portion 8A branches on the inner peripheral surface 3a of the rehabilitated pipe 3 via the branch upstream end portion 50a of the elastic seal material 50. Since it is engaged with the peripheral edge of the opening of the mouth 5, the rust preventive sleeve 42 in which the coated cylindrical body 8 is integrally formed is fixedly held so as not to move in the branch axis direction.

  Therefore, a relatively large difference corresponding to the difference between the diameter of the branch port 5 and the inner diameter of the branch tube portion 2 is provided between the opening peripheral edge of the branch port 5 of the rehabilitated tube 3 and the inner peripheral surface 2a of the branch tube portion 2. Even when there is a step, the coated cylinder formed at the tip of the antirust sleeve 42 when the antirust sleeve 42 covering the antirust target region of the inner peripheral surface 2a of the branch pipe portion 2 is attached. The body 8 can be inserted and disposed at a predetermined mounting position of the branch port 5.

Therefore, the rust preventive sleeve 42 and the coated cylindrical body 8 are branched by simply covering the inner peripheral surface 5a of the branched port 5 with the coated cylindrical body 8 inserted and disposed in the branched port 5 of the rehabilitation pipe 3. It can be attached to the tube portion 2 in a retaining state.
Moreover, by utilizing the sealing function of the rust prevention sleeve 42, the fluid in the branch pipe portion 2 passes through between the opposing surfaces of the outer peripheral surface 8 b of the coated tubular body 8 and the inner peripheral surface 2 a of the branch pipe portion 2. Inflow between the outer peripheral surface 3b of the rehabilitated pipe 3 and the inner peripheral surface 1a of the water pipe 1 can also be reliably prevented.
In addition, since the other structure is the same as the structure demonstrated in 5th Embodiment, the same number is attached to the same component location as 5th Embodiment, and the description is abbreviate | omitted.

[Thirteenth embodiment]
18 and 19 show an embodiment of a modified example of the branch portion structure of the water pipe 1 described in the twelfth embodiment. In this embodiment, the rust prevention sleeve 42 and the coated cylindrical body 8 integrally formed at the branch upstream end of the rust prevention sleeve 42 are configured in a substantially straight tube shape.
The coated cylindrical body 8 is fixed to the entire inner diameter expanded cylinder portion 8B integrally formed with the same diameter as the rust prevention sleeve 42 and the outer peripheral surface of the inner diameter expanded cylinder portion 8B, and the diameter of the branch port 5 It is comprised from the cylindrical outer side elastic sealing material 51 formed in the outer diameter of slightly smaller diameter than.

  The rust prevention sleeve 42 is in a watertight state in which a sealing material such as a gasket is interposed between the flange 2A of the branch pipe portion 2 and the plate flange 43 which is an example of water supply equipment or the flange 26A of the valve (repair valve) 26. A sleeve main body having a sleeve holding member 42D to be clamped and fixed, and a flange portion 42e that can be engaged with a concave annular locking portion 42d formed at the branch downstream end of the sleeve holding member 42D from the branch downstream side. 42E is provided as a main component.

  In the present embodiment, the flange portion 42f of the sleeve holding member 42D is held in a watertight state between the flange 2A of the branch pipe portion 2 and the plate flange 43 by the tightening and fixing operation with the fastener 16 such as the bolt 16A and the nut 16B. It is fixed.

  An annular seal opening radially inward at one or a plurality of locations in the branch axis direction of the inner peripheral surface of the inner fitting cylindrical portion 42g of the sleeve holding member 42D inserted and arranged in the branch pipe portion 2 A groove 42h is formed, and an O-ring 44, which is an example of a sealing material that seals water tightly between the outer peripheral surface 42b of the sleeve main body 42E, is attached to the seal groove 42h.

  When the inner diameter expanded cylindrical portion 8B of the coated cylindrical body 8 is expanded and deformed by the diameter expanding means A1, the inner diameter expanded cylindrical portion 8B causes the outer elastic seal material 51 to be attached to the regenerated pipe 3 as shown in FIG. In the state of being crimped to the inner peripheral surface 5 a of the branch port 5, the opening peripheral edge portion of the branch port 5 in the inner peripheral surface 3 a of the rehabilitation pipe 3 is bent outwardly in the caliber direction.

In the state in which the inner diameter expanded cylindrical portion 8B of the coated tubular body 8 is expanded and deformed, the inner diameter expanded cylindrical portion 8B is connected to the inner peripheral surface 3a of the rehabilitated tube 3 via the branch upstream end of the outer elastic sealing material 51. Is engaged with the peripheral edge of the opening of the branch port 5, the rust preventive sleeve 42 in which the coated tubular body 8 is integrally formed is fixed and held immovably in the branch axis direction.
In addition, since the other structure is the same as the structure demonstrated in 12th Embodiment, the same number is attached to the same component location as 12th Embodiment, and the description is abbreviate | omitted.

[Fourteenth embodiment]
20-22 shows embodiment of the modification of the branch part structure of the water pipe 1 demonstrated in the above-mentioned 12th Embodiment. In this embodiment, a plate flange 52, which is an example of water supply equipment, is fixedly connected to the flange 2 </ b> A of the branch pipe portion 2 in a watertight state, and the plate flange 52 is rust-proof on the entire inner peripheral surface of the branch pipe portion 2. A branch downstream end of the metal rust prevention sleeve 42 covering the target region is inserted and held in a watertight state.
An example of a sealing material that abuts the outer circumferential surface 42b of the rust prevention sleeve 42 in a compressed state in the sealing groove 52a formed on the inner circumferential surface of the insertion hole of the plate flange 52 and holds the rust prevention sleeve 42 in a watertight state. An O-ring 29 is attached.

As shown in FIG. 21, the tip of the anticorrosive sleeve 42 on the upstream side of the branch is prevented from entering clean water between the joint surfaces of the outer peripheral surface 3b of the rehabilitated pipe 3 and the inner peripheral surface 1a of the water pipe 1. In the state, a covered cylindrical body 8 that covers the inner peripheral surface 5a of the branch port 5 in the rehabilitation pipe 3 is integrally formed.
The coated tubular body 8 includes an annular presser portion 8C integrally formed in a state protruding radially outward at a position corresponding to the tip of the anticorrosion sleeve 42 on the upstream side of the branch, and from the position corresponding to the tip to the branch axis direction. A thin inner diameter expanded cylindrical portion 8D integrally formed in a state of extending along the edge, and a range extending from the opening peripheral portion of the branch port 5 and the inner peripheral surface 5a of the branch port 5 to the stepped portion 6 are sealed watertight. A possible cylindrical elastic sealing material 53 is provided.
The elastic sealing material 53 is fixed over the holding surface on the upstream side of the branch of the annular pressing portion 8C and the outer peripheral surface of the inner diameter enlarged cylindrical portion 8D.

  And as shown in FIG. 20, among the inner side expanded cylindrical portion 8D of the coated tubular body 8, a tube inner side portion that protrudes toward the tube core side of the water pipe 1 from the inner peripheral surface 3a of the rehabilitated tube 3 is formed. By expanding and deforming by the diameter expanding means A1, the tube inner side portion of the inner diameter expanded cylindrical portion 8D is bent toward the radially outer side of the branch port 5, and accordingly, the tube inner side portion of the elastic sealing material 53 Is pressure-bonded in a watertight state to the opening peripheral portion of the branch port 5 on the inner peripheral surface 3a of the rehabilitation pipe 3.

In the diameter expansion process in which the inner diameter expansion cylindrical portion 8D of the coated tubular body 8 is expanded and deformed by the diameter expansion means A1, the diameter expansion means A1 is provided on the flange 2A of the branch pipe portion 2 as shown in FIG. The provided link type bush mounting device C is attached.
The branch downstream side end portion of the rust prevention sleeve 42 is pressed by the pressing portion 35C of the outer shaft 35 of the link type bush mounting device C, and the elastic sealing material 53 located at the annular pressing portion 8C of the coated cylindrical body 8 is pressed. A part is pressed against the step portion 6 on the outer peripheral surface 3b of the rehabilitation pipe 3, and the rust prevention sleeve 42 and the coated cylindrical body 8 are fixed and held in a predetermined posture.

Due to the relative proximity movement between the pressing portion 35A of the outer shaft 35 and the diameter-enlarging operation link portion 36A of the hip-folded link 36 in the overhanging posture, the tube inner side portion of the coated tubular body 8 is expanded and deformed.
In addition, since the other structure is the same as the structure demonstrated in 12th Embodiment, the same number is attached to the same component location as 12th Embodiment, and the description is abbreviate | omitted.

[Fifteenth embodiment]
FIGS. 23-25 shows embodiment of the modification of the branch part structure of the water pipe 1 demonstrated in the above-mentioned 12th Embodiment. In this embodiment, as in the above-described fourteenth embodiment, the entire inner peripheral surface of the branch pipe portion 2 is connected to the plate flange 52 which is an example of water supply equipment fixedly connected to the flange 2A of the branch pipe portion 2 in a watertight state. The downstream end of the branch of the metal rust prevention sleeve 42 that covers the rust prevention target region is inserted and held in a watertight state.

  In the portion corresponding to the upstream end of the branch of the rust prevention sleeve 42, the rehabilitation pipe 3 is in a state of preventing the ingress of clean water between the joint surfaces of the outer peripheral surface 3 b of the rehabilitation pipe 3 and the inner peripheral surface 1 a of the water pipe 1. A coated cylindrical body 8 that covers the inner peripheral surface 5a of the branch port 5 is provided.

The covered cylindrical body 8 is integrally formed continuously with the screw cylinder portion 8E integrally with the portion corresponding to the branch upstream side end portion of the rust prevention sleeve 42, and is continuously formed integrally with the screw cylinder portion 8E. In a state where the covering cylinder portion 8F inserted and arranged in the branch port 5 of the pipe 3, the inner peripheral surface 5a of the branch port 5 and the opening peripheral portion of the branch port 5 in the inner peripheral surface 3a of the rehabilitated pipe 3 are sealed in a watertight manner. The tube inner elastic seal material 8G that is sheathed on the covering tube portion 8F and the tube outer elastic seal that is sheathed on the covering tube portion 8F in a state where the peripheral edge portion of the branch port 5 on the outer peripheral surface 3b of the rehabilitated tube 3 is watertightly sealed. An elastically deformable seal pressing ring 8J that is received and supported by a flange 8f formed at the branch downstream end of the covering cylinder portion 8F in contact with the pipe inner elastic seal material 8G, and a pipe The outer cylinder is covered with the covering cylinder portion 8F in contact with the outer elastic sealing material 8H. And genus made pressing ring 8K, and a pressing nut 8L which is screwed into the screw cylinder portion 8E is provided in a state of contact with the junk ring 8K.
The sleeve body S is configured by integrally forming the screw cylinder portion 8E and the covering cylinder portion 8F of the covering cylindrical body 8 on the rust prevention sleeve 42.

  When the rust preventive sleeve 42 and the coated cylindrical body 8 are attached to the cover, first, as shown in FIG. The sleeve body S formed integrally with the covering cylinder portion 8F is put into the water pipe 1 from the branch flow path 4 of the branch pipe portion 2 through the branch port 5, and the pipe inner elastic sealing material 8G and the seal pressing ring 8J are also included. It puts in the water pipe 1 in the state which elastically deformed and operated in the shape which can pass the branch port 5.

  Inside the water pipe 1, the seal pressing ring 8J and the pipe inner elastic sealing material 8G are externally mounted on the covering cylinder portion 8F of the sleeve body S, and the rust prevention sleeve 42, the screw cylinder portion 8E and the covering cylinder portion 8F of the sleeve body S are covered. A part is inserted from the branch port 5 into the branch flow path 4.

As shown in FIG. 25, the tube outer elastic sealing material 8H, the push ring 8K, and the pressing nut 8L are assembled to the covering cylinder portion 8F and the screw cylinder portion 8E of the sleeve body S that is inserted and arranged, and the pressing nut 8L is attached. When the tightening operation is performed, the tube outer elastic seal member 8H and the tube inner elastic seal member 8G are compressed between the push ring 8K and the seal pressing ring 8J, and the sleeve body S is in a watertight state at the opening peripheral portion of the branch port 5 of the rehabilitated tube 3. And the mounting of the rust prevention sleeve 42 and the coated cylindrical body 8 is completed.
In addition, since the other structure is the same as the structure demonstrated in 12th Embodiment, the same number is attached to the same component location as 12th Embodiment, and the description is abbreviate | omitted.

[Sixteenth Embodiment]
FIG. 26 shows an embodiment of a modification of the branch structure of the water pipe 1 described in the fifteenth embodiment. In this embodiment, the flange 8f formed at the branch upstream end of the coated cylinder 8F is configured to have an outer diameter substantially the same as the outer diameter of the seal pressing ring 8J (see FIG. 23). It is comprised so that the pipe inner side elastic sealing material 8G may be pressed directly.
Therefore, in this embodiment, the sleeve body S formed by integrally forming the screw cylinder portion 8E and the covering cylinder portion 8F of the covering cylindrical body 8 on the rust prevention sleeve 42 is provided in a self-propelled pipe provided with a camera. It is transported to a position corresponding to the branch port 5 by a transport vehicle or artificial force, and the pipe inner elastic sealing material 8G is externally mounted on the covering cylinder portion 8F of the sleeve body S, and the rust prevention sleeve 42 and the screw cylinder portion 8E of the sleeve body S are covered. And a part of the covering cylinder portion 8F are inserted and arranged from the branch port 5 into the branch flow path 4.

When the tube outer elastic sealing material 8H, the pusher wheel 8K, and the pressing nut 8L are assembled to the covering cylinder part 8F and the screw cylinder part 8E of the sleeve body S that is inserted and arranged, and the pressing nut 8L is tightened, the pressing wheel 8K The tube outer elastic seal material 8H and the tube inner elastic seal material 8G are compressed between the flange portion 8f of the covering cylinder portion 8F, and the sleeve body S is sandwiched and fixed to the peripheral edge portion of the branch port 5 of the rehabilitation tube 3 in a watertight state. Thus, the mounting of the rust prevention sleeve 42 and the coated cylindrical body 8 is completed.
Since the other configurations are the same as those described in the fifteenth embodiment, the same components as those in the fifteenth embodiment are denoted by the same reference numerals, and the description thereof is omitted.

[Seventeenth embodiment]
FIGS. 27-29 show embodiment of the modification of the branch part structure of the water pipe 1 demonstrated in the above-mentioned 13th Embodiment. In this embodiment, a plate flange 60, which is an example of water supply equipment, is fixedly connected to the flange 2 </ b> A of the branch pipe portion 2 by a fastener 16 in a watertight state. The branch pipe portion 2 is inserted into the insertion hole of the plate flange 60. The end portion on the downstream side of the branch of the rust prevention sleeve 42 made of metal that covers the rust prevention target region of the entire inner peripheral surface is inserted and held in a watertight state.
An example of a sealing material that abuts the outer peripheral surface 42b of the rust prevention sleeve 42 in a compressed state in the seal groove 60a formed on the inner peripheral surface of the insertion hole of the plate flange 60 and holds the rust prevention sleeve 42 in a watertight state. An O-ring 61 is attached.

Between the flange 2 </ b> A of the branch pipe portion 2 and the plate flange 60, it is formed at the branch downstream end of the centering ring 62 that matches the sleeve axis of the rust prevention sleeve 42 with the branch axis of the branch pipe portion 2. And a gasket (packing) 63 which is an example of a sealing material for watertightly sealing between the facing surfaces of the flange portion 2A and the plate flange 60 of the branch pipe portion 2 and the radial direction of the flange portion of the centering ring 62 An outer ring 66 that forms an annular seal mounting groove is provided between the outer peripheral edge of the outer side.
The centering ring 62 is formed with an outer position restricting surface 62 a that contacts the inner peripheral surface 2 a of the branch pipe portion 2 and an inner position restricting surface 62 b that contacts the outer peripheral surface 42 b of the rust prevention sleeve 42.

  And the gasket 63 arrange | positioned in the seal | sticker installation groove | channel between the outer periphery part in the collar part of the centering ring 62 and the outer ring 66 is the flange 2A of the branch pipe part 2 by the fastener 16, and the plate flange 60. It is compressed into a watertight state by tightening and fixing operation.

  In the portion corresponding to the upstream end of the branch of the rust prevention sleeve 42, the rehabilitation pipe 3 is in a state of preventing the ingress of clean water between the joint surfaces of the outer peripheral surface 3 b of the rehabilitation pipe 3 and the inner peripheral surface 1 a of the water pipe 1. A coated cylindrical body 8 that covers the inner peripheral surface 5a of the branch port 5 is provided.

  In this covered cylindrical body 8, a covered cylindrical portion 8M which is integrally formed continuously at a portion corresponding to the branch upstream side end portion of the rust prevention sleeve 42 and inserted into the branch port 5 of the rehabilitation pipe 3, A pressing portion 8N having a diameter larger than the diameter of the branch port 5 formed integrally with the branch upstream end of the covering cylinder portion 8M, a pressing surface of the pressing portion 8N, and a branch port in the inner peripheral surface 3a of the rehabilitation pipe 3 5 is provided with an O-ring 64 that is an example of a sealing material that is externally mounted on the covering cylinder portion 8M in a state where the space between the opposing surfaces of the opening peripheral portion 5 can be sealed in a watertight manner.

Further, the male screw portion 42j formed at the branch downstream end portion of the rust preventive sleeve 42 is tightened in a state of being in contact with the annular partition wall portion 60b formed on the inner peripheral surface of the insertion hole of the plate flange 60. The rust preventive sleeve 42 is drawn and moved toward the downstream side of the plate flange 60 by screwing to the side, and the opening peripheral edge of the branch port 5 on the pressing surface of the pressing portion 8N and the inner peripheral surface 3a of the rehabilitating pipe 3 A tightening nut 65 that compresses the O-ring 64 interposed between the opposing surfaces to the portion in a watertight state is screwed.
A sleeve body S is configured by integrally forming a covering cylinder portion 8M and a pressing portion 8N of the covering cylindrical body 8 on the rust prevention sleeve 42.

  When the rust preventive sleeve 42 and the coated cylindrical body 8 are covered and mounted, first, as shown in FIG. 28, among the constituent elements of the coated cylindrical body 8, the rust preventive sleeve 42 is covered with the coated cylindrical portion 8M. The sleeve body S formed integrally with the pressing portion 8N is transported to a position corresponding to the branch port 5 by a self-propelled in-pipe transport vehicle equipped with a camera or by artificial force, and the sleeve body S in the water pipe 1 The O-ring 64 is externally mounted on the covered cylinder portion 8M, and the rust prevention sleeve 42 of the sleeve body S and a part of the covered cylinder portion 8M are inserted into the branch flow path 4 from the branch port 5.

  A centering ring 62 is externally attached to the downstream branch portion of the sleeve body S that is inserted, the outer position regulating surface 62a of the centering ring 62 is brought into contact with the inner peripheral surface 2a of the branch pipe portion 2, and the inner side By bringing the position regulating surface 62 b into contact with the outer peripheral surface 42 b of the rust prevention sleeve 42, the sleeve axis of the rust prevention sleeve 42 is matched with the branch axis of the branch pipe portion 2.

  A gasket 63 and an outer ring 66 are arranged on the radially outer side portion of the centering ring 62 in the flange 2A of the branch pipe portion 2, and the plate flange 60 on which the O-ring 61 is mounted is connected to the downstream side of the sleeve body S. The plate flange 60 and the flange 2A of the branch pipe portion 2 are fastened and fixed by a fastener 16 such as a bolt 16A and a nut 16B.

  In a state where the plate flange 60 is fastened and fixed to the flange 2 </ b> A of the branch pipe portion 2, a space between the inner peripheral surface of the plate flange 60 and the outer peripheral surface 42 b of the rust prevention sleeve 42 is sealed in a watertight state by an O-ring 61. The space between the opposing surfaces of the flange 2A of the branch pipe portion 2 and the plate flange 60 is sealed in a watertight state by a gasket 63.

  Next, the tightening nut 65 is screwed into the male thread portion 42j formed at the branch downstream end of the rust prevention sleeve 42, and the tightening nut 65 is brought into contact with the annular partition wall portion 60b of the plate flange 60. When the screwing operation is performed on the tightening side, the antirust sleeve 42 is drawn and moved to the branch downstream side with respect to the plate flange 60, and accordingly, the pressing surface of the pressing portion 8N and the branching port on the inner peripheral surface 3a of the rehabilitation pipe 3 are moved. 5 is compressed in a watertight state.

In this state, the branch downstream end of the rust preventive sleeve 42 of the sleeve body S is fixed to the plate flange 60 with a tightening nut 65, and the coated tubular body 8 of the sleeve body S branches on the inner peripheral surface 3 a of the rehabilitated pipe 3. It is engaged with the peripheral edge of the opening of the mouth 5 in a watertight state, and the mounting of the rust preventive sleeve 42 and the coated cylindrical body 8 is completed.
In addition, since the other structure is the same as the structure demonstrated in 13th Embodiment, the same number is attached to the same component location as 13th Embodiment, and the description is abbreviate | omitted.

[Other Embodiments]
(1) In each of the above-described embodiments, when forming the rehabilitation pipe 3 on the inner peripheral surface 1a of the water pipe 1 by lining treatment, a tubular lining in which a thermosetting resin is impregnated or applied in the water pipe 1 The hose lining construction method was adopted, in which the material was inverted and inserted to form the rehabilitation pipe 3 by curing the thermosetting resin of the lining material by steam overheating or warm water heating, normal temperature curing, etc. You may employ | adopt the pipe reverse construction method which inserts a polyethylene pipe and presses cement milk between the inner peripheral surface of the water pipe 1 and the outer peripheral surface of a polyethylene pipe, and forms the rehabilitation pipe | tube 3.

(2) In the above-described embodiment, the water pipe 1 is exemplified as the fluid pipe, but another fluid pipe through which industrial water, gas, or the like flows may be used.

(3) In the above-described embodiment, the branch structure in which the branch pipe portion 2 is integrally formed with the water pipe 1 has been described. However, the opening peripheral portion of the branch port 5 and the branch pipe portion 2 in the outer peripheral surface 3b of the rehabilitated pipe 3. As long as the stepped portion 6 is formed between the inner peripheral surface 2a and the inner peripheral surface 2a, the branch pipe portion 2 may be configured separately from the water pipe 1.

1 Fluid pipe (water pipe)
DESCRIPTION OF SYMBOLS 1a Inner peripheral surface 2 Branch pipe part 3 Rehabilitation pipe 5 Branch port 5a Inner peripheral surface 5b Outer peripheral surface 7 Covering ring part 7A Reinforcing cylindrical body 8 Covered cylindrical body 9 Bush (covered cylindrical body)
9A Covered cylindrical body (Bush body)
9B Elastic layer 10 Adhesive layer 11 Thin film 13 Inflow prevention means 29 Seal material (inflow prevention means)
32 Sealing material (inflow prevention means)
41 Reinforcing core 42 Rust prevention sleeve (inflow prevention means)

Claims (8)

A branch port having a smaller diameter than the inner diameter of the branch pipe portion is formed through the branch formation portion of the rehabilitation pipe formed by lining on the inner peripheral surface of the fluid pipe provided with the branch pipe portion, and the outer peripheral surface of the rehabilitation pipe Fluid in which a coated cylindrical body covering the inner peripheral surface of the branch port in the rehabilitation pipe is mounted by diameter expansion deformation in a state in which fluid is prevented from entering between the joint surfaces of the fluid pipe and the inner peripheral surface of the fluid pipe A pipe branch structure,
Of the outer peripheral surface of the rehabilitating pipe, the outer peripheral surface portion located at the step portion between the opening peripheral edge of the branch port and the inner peripheral surface of the branch pipe portion is the same as or substantially the same as the diameter of the branch port. A covering mounting ring portion having an inner diameter is arranged,
Inflow prevention means for preventing fluid from flowing in between the joint surfaces via a space between the outer peripheral surface of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion is provided,
The said covering cylindrical body is provided with the pipe | tube outer side cylinder part which protrudes in the branch downstream end part side of the said mounting | wearing ring part, and the pipe inner side cylinder part which protrudes in the inner peripheral surface side of the said renovation pipe | tube. And the branch part structure of the fluid pipe by which the said pipe outer side cylinder part and the pipe inner side cylinder part are each expanded and deform | transformed in the diameter direction outer side of the said branch port in the retaining engagement state.   The coated tubular body includes a hard coated tubular body, and an elastic layer formed at a portion corresponding to at least the branch port of the renovated pipe and the covering mounting ring portion on the outer peripheral surface of the coated tubular body. The fluid pipe branch portion structure according to claim 1, further comprising:   The fluid pipe branch structure according to claim 1 or 2, wherein an adhesive layer is formed on at least a portion of the outer peripheral surface of the coated tubular body corresponding to the branch port of the rehabilitated pipe and the cover mounting ring. A branch port having a smaller diameter than the inner diameter of the branch pipe portion is formed through the branch formation portion of the rehabilitation pipe formed by lining on the inner peripheral surface of the fluid pipe provided with the branch pipe portion, and the outer peripheral surface of the rehabilitation pipe Fluid in which a coated cylindrical body covering the inner peripheral surface of the branch port in the rehabilitation pipe is mounted by diameter expansion deformation in a state in which fluid is prevented from entering between the joint surfaces of the fluid pipe and the inner peripheral surface of the fluid pipe A pipe branch structure,
A ring portion for covering attachment is disposed at a step portion between an opening peripheral portion of the branch port and an inner peripheral surface of the branch pipe portion on the outer peripheral surface of the rehabilitation pipe,
Inflow prevention means for preventing fluid from flowing in between the joint surfaces via a space between the outer peripheral surface of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion is provided,
A tube outer side cylindrical portion protruding toward the branch downstream end side of the covering mounting ring portion and a tube inner side cylindrical portion protruding toward the inner peripheral surface side of the rehabilitated tube in the covering cylindrical body are respectively engaged with retaining. In the state, the diameter is expanded and deformed outward in the radial direction of the branch port,
A fluid pipe branch portion structure in which the inflow blocking means is formed of a seal material that seals between the outer peripheral surface of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion. A branch port having a smaller diameter than the inner diameter of the branch pipe portion is formed through the branch formation portion of the rehabilitation pipe formed by lining on the inner peripheral surface of the fluid pipe provided with the branch pipe portion, and the outer peripheral surface of the rehabilitation pipe Fluid in which a coated cylindrical body covering the inner peripheral surface of the branch port in the rehabilitation pipe is mounted by diameter expansion deformation in a state in which fluid is prevented from entering between the joint surfaces of the fluid pipe and the inner peripheral surface of the fluid pipe A pipe branch structure,
A ring portion for covering attachment is disposed at a step portion between an opening peripheral portion of the branch port and an inner peripheral surface of the branch pipe portion on the outer peripheral surface of the rehabilitation pipe,
Inflow prevention means for preventing fluid from flowing in between the joint surfaces via a space between the outer peripheral surface of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion is provided,
A tube outer side cylindrical portion protruding toward the branch downstream end side of the covering mounting ring portion and a tube inner side cylindrical portion protruding toward the inner peripheral surface side of the rehabilitated tube in the covering cylindrical body are respectively engaged with retaining. In the state, the diameter is expanded and deformed outward in the radial direction of the branch port,
The coating mounting ring portion, wherein formed at the tip portion of the anticorrosive sleeve covering the rust target area of the inner peripheral surface of the branch pipe part, a fluid pipe said inflow preventing means is configured with the antirust sleeve Bifurcation structure. A branch port having a smaller diameter than the inner diameter of the branch pipe portion is formed through the branch formation portion of the rehabilitation pipe formed by lining on the inner peripheral surface of the fluid pipe provided with the branch pipe portion, and the outer peripheral surface of the rehabilitation pipe Fluid in which a coated cylindrical body covering the inner peripheral surface of the branch port in the rehabilitation pipe is mounted by diameter expansion deformation in a state in which fluid is prevented from entering between the joint surfaces of the fluid pipe and the inner peripheral surface of the fluid pipe A pipe branch structure,
A ring portion for covering attachment is disposed at a step portion between an opening peripheral portion of the branch port and an inner peripheral surface of the branch pipe portion on the outer peripheral surface of the rehabilitation pipe,
Inflow prevention means for preventing fluid from flowing in between the joint surfaces via a space between the outer peripheral surface of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion is provided,
A tube outer side cylindrical portion protruding toward the branch downstream end side of the covering mounting ring portion and a tube inner side cylindrical portion protruding toward the inner peripheral surface side of the rehabilitated tube in the covering cylindrical body are respectively engaged with retaining. In the state, the diameter is expanded and deformed outward in the radial direction of the branch port,
The coating mounting ring portion is formed with a thin film that closes the branch flow path in a state of being continuous with the inner peripheral surface of the fluid pipe, and that is simultaneously cut and separated when the branch port of the rehabilitation pipe is formed. diversion mechanism of the fluid conduit are. The reinforcing core that suppresses deformation of the coated cylindrical body due to relative movement between the fluid pipe and the rehabilitated pipe is inserted and arranged in a fixed position on the inner peripheral surface of the coated cylindrical body. The branch part structure of the fluid pipe | tube of any one of -6. A branch port having a smaller diameter than the inner diameter of the branch pipe portion is formed through the branch formation portion of the rehabilitation pipe formed by lining on the inner peripheral surface of the fluid pipe provided with the branch pipe portion, and the outer peripheral surface of the rehabilitation pipe Fluid in which a coated cylindrical body covering the inner peripheral surface of the branch port in the rehabilitation pipe is mounted by diameter expansion deformation in a state in which fluid is prevented from entering between the joint surfaces of the fluid pipe and the inner peripheral surface of the fluid pipe A pipe branch structure,
A ring portion for covering attachment is disposed at a step portion between an opening peripheral portion of the branch port and an inner peripheral surface of the branch pipe portion on the outer peripheral surface of the rehabilitation pipe,
Inflow prevention means for preventing fluid from flowing in between the joint surfaces via a space between the outer peripheral surface of the covering mounting ring portion and the inner peripheral surface of the branch pipe portion is provided,
A tube outer side cylindrical portion protruding toward the branch downstream end side of the covering mounting ring portion and a tube inner side cylindrical portion protruding toward the inner peripheral surface side of the rehabilitated tube in the covering cylindrical body are respectively engaged with retaining. In the state, the diameter is expanded and deformed outward in the radial direction of the branch port,
The coating on the mounting ring portion, diversion mechanism of the fluid conduit reinforced tubular body to be inserted in the inner peripheral surface of the branch opening in the rehabilitating pipe is provided.

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