阅读说明：本技术 配管结构、方法以及管施工方法 (Piping structure, method and pipe construction method ) 是由 佐藤敏之 于 2019-02-14 设计创作，主要内容包括：一种在管形成开口的方法,具备：以沿管的周向(R)分割的壳体将管围绕的工序；以配置于壳体内的切削工具来切削管的外表面,并将具有由薄壁形成的底的凹槽形成于管的薄壁形成工序；为了去除因切削而生成的切屑而将切屑与壳体内的气体一起吸引的吸引工序；以及在执行薄壁形成工序和吸引工序后,戳破薄壁而形成开口的工序。(A method of forming an opening in a tube, comprising: a step of surrounding the pipe with a shell divided along the circumferential direction (R) of the pipe; a thin-wall forming step of cutting the outer surface of the pipe with a cutting tool disposed in the housing and forming a groove having a bottom formed of a thin wall in the pipe; a suction step of sucking the chips together with the gas in the housing in order to remove the chips generated by cutting; and a step of forming an opening by piercing the thin wall after the thin wall forming step and the suction step are performed.)

1. A method of forming an opening in a tube (1), comprising:

a surrounding step of surrounding a part of the tube (1) with a housing (20) and attaching a cutter (32) having a cutter-like tool as a cutting tool (3) to the housing (20);

a thin-wall forming step of cutting an outer surface (13) of the pipe (1) with the cutting tool (3) disposed in the housing (20) and forming a bottomed groove (G) formed by a thin wall (1S) in the pipe (1);

a removal step of removing chips (T) generated by the cutting; and

and an opening forming step of forming an opening (10) by piercing the thin wall (1S) after the thin wall forming step and the removing step are performed.

2. The method of claim 1, wherein,

the thin-wall forming process is performed by:

the cutting tool (3) is rotated together with the housing (20) in the circumferential direction (R) of the pipe (1) while rotating the milling cutter-shaped cutting tool (3) about the central axis (30) of the tool, thereby forming the bottomed groove (G) which is long in the circumferential direction (R).

3. The method of claim 2, wherein,

the method further comprises an insertion step in which a partition valve body (4) is inserted into the pipe (1) from the opening (10).

4. A method of forming an opening in a tube (1), comprising:

an assembly step of assembling a rotating body (2) that can rotate in the circumferential direction (R) of a pipe (1) around the pipe (1), and attaching a cutter (32) having a milling-like cutting tool (3) to the rotating body;

a thin-wall forming step of forming a bottomed groove (G) formed by a thin wall (1S) and long in the circumferential direction (R) on the pipe (1) by turning the cutting tool (3) together with the rotating body (2) in the circumferential direction (R) of the pipe (1) while rotating the cutting tool (3) in a milling cutter shape about the central axis (30) of the tool, thereby cutting the outer surface (13) of the pipe (1);

a removal step of removing chips (T) generated by the cutting; and

and an opening forming step of forming an opening (10) by piercing the thin wall (1S) after the thin wall forming step and the removing step are performed.

5. The method of claim 1 or 4,

after the thin-wall forming step and the removing step are performed and before the opening forming step, a coating film forming step is further provided in which a coating film (6) is formed on the surface of the groove (G) of the pipe (1).

6. The method of claim 4, wherein,

the rotating body comprises a housing (20) divided in the circumferential direction (R) of the pipe (1),

in the assembly process, surrounding a portion of the tube (1) with the housing (20),

the method is further provided with:

an assembly step of assembling a flat plate-like partition valve body (4) that has been pierced through the thin wall (1S) to the housing (20) in place of the tool (3) prior to the opening forming step of forming the opening (10); and

in the opening forming step, an insertion step of inserting the partition valve body (4) into the pipe (1) from the opening (10).

7. The method of claim 6, wherein,

the partition valve body (4) is provided with:

a valve body (40) that enters the interior of the tube (1) and is circular in shape;

a blade (41) that is provided on the front end side of the valve main body (40) and that forms the opening (10) by piercing the thin wall (1S); and

a sealing section (42) which is provided on the base end side opposite to the tip end side and which is in contact with a portion around the opening (10) of the tube (1) to close the opening (10),

a blade (41) of the partition valve body (4) performs the opening forming process of forming the opening (10) by piercing the thin wall (1S),

the insertion step is performed by a valve body (40) that partitions the valve body penetrating into the pipe (1), the seal portion (42) contacting a portion around the opening (10) of the pipe (1), and the tip end side of the valve body (40) contacting the inner peripheral surface (14) of the pipe (1).

8. The method of claim 7, wherein,

said groove (G) extending in the circumferential direction (R) of the pipe (1),

the thin wall (1S) is formed such that the thickness of the central portion in the tube axis direction (S) is thinner than the thickness of both sides in the tube axis direction (S),

the opening forming step of forming the opening (10) is performed by piercing the thin central portion with the blade (41).

9. The method of claim 1, wherein,

the thin-wall forming process is performed by:

the cutting tool (3) is rotated in the circumferential direction (R) of the pipe (1) and moved in the pipe axial direction (S) of the pipe (1) while rotating the milling cutter-shaped cutting tool (3) about the central axis (30) of the tool, thereby forming the bottomed recess (G) in an annular shape.

10. The method of claim 9, wherein,

in the opening forming step of forming the opening (10), the thin wall (1S) is pierced by an annular blade (41) that matches the annular bottomed groove (G) to form the opening (10) as a branch port in the pipe (1),

the method further includes a step of removing the annular blade.

11. A piping structure is formed by combining a partition valve body (4) with a pipe (1),

the piping structure includes:

a tube (1) defining a bottomed groove (G) extending in a circumferential direction (R) and formed by a thin wall (1S);

a case (20) surrounding a portion of the tube (1) including the bottomed groove (G);

a partition valve body (4) disposed in the housing (20); and

a valve rod (43) which moves the partition valve body (4) so that the partition valve body (4) approaches the groove (G) and further punctures the thin wall (1S) of the groove (G) with a bottom to form an opening (10),

the partition valve body (4) is provided with:

a valve body (40) that enters the interior of the tube (1) and is circular in shape;

a blade (41) provided on the front end side of the valve main body (40) and configured to pierce the thin wall (1S) to form the opening (10): and

and a seal portion (42) which is provided on the base end side opposite to the tip end side and which is in contact with a portion around the opening (10) of the tube (1) to close the opening (10).

12. The piping structure according to claim 11,

the blade (41) of the valve body (40) is made of metal,

the metal blade (41) of the valve body (40) in the closed state is in contact with the inner peripheral surface (14) of the pipe (1), and the seal portion (42) is in contact with a portion around the opening (10) of the pipe (1).

13. A pipe construction method for obtaining the piping structure according to claim 11 or 12, comprising:

an assembly step of assembling a rotating body (2) that is rotatable in the circumferential direction (R) of the pipe (1) around the pipe (1), and attaching a cutter (32) having a milling-like cutting tool (3) to the rotating body,

a thin-wall forming step of forming a bottomed groove (G) formed in a thin wall (1S) and long in the circumferential direction (R) on the pipe (1) by turning the cutting tool (3) in the circumferential direction (R) of the pipe (1) together with the rotating body while rotating the cutting tool (3) in a milling cutter shape around the central axis (30) of the tool, thereby cutting the outer surface (13) of the pipe (1);

a removal step of removing chips (T) generated by the cutting;

removing the rotating body and the cutter (32) from the tube (1); and

and a step of fitting the housing (20) to the pipe (1) so that the housing (20) having the partition valve body (4) built therein surrounds a part of the pipe (1) including the bottomed groove (G).

14. The method of claim 4, wherein,

the method is further provided with:

a removal step of removing the rotating body (2) and the cutter (32);

an assembly step of assembling the case (20) to the pipe (1) so that a bottomed recess (G) of the pipe (1) is surrounded by a case (20) housing a flat plate-like partition valve body (4) for piercing the thin wall (1S) before the opening forming step for forming the opening (10); and

in the opening forming step, an insertion step of inserting the partition valve body (4) into the pipe (1) from the opening (10).

Technical Field

The invention relates to a piping structure, a piping method, and a piping construction method.

Background

Conventionally, there has been known a method of cutting an existing pipe with a cutting tool to form an opening without stopping the flow of a fluid in the existing pipe, and inserting a partition valve body into a line of the existing pipe from the opening (see patent documents 1 and 2).

Disclosure of Invention

However, the conventional method cannot avoid intrusion of fine chips generated when the cutting tool forms the opening into the existing pipe. The chips not only become inclusions in the interior of the water pipe, but also cause rusting.

It is therefore an object of the present invention to provide: a piping structure, a method and a method (method) for constructing a pipe, in which chips generated during cutting do not enter the pipe and an opening is formed in the pipe.

In a first aspect, the method of the present invention is a method of forming an opening in a tube 1, including:

a surrounding step of surrounding a part of the tube 1 with a housing 20 and attaching a cutter 32 having a cutter-like tool as a cutting tool 3 to the housing 20;

a thin-wall forming step of cutting the outer surface 13 of the pipe 1 with the cutting tool 3 disposed in the housing 20 and forming a bottomed groove G formed by a thin wall 1S in the pipe 1;

a removal step of removing chips (T) generated by the cutting; and

and an opening forming step of forming an opening (10) by piercing the thin wall (1S) after the thin wall forming step and the removing step are performed.

In a second aspect, the method of the present invention is a method of forming an opening in a tube 1, including:

an assembling step of assembling a rotary body 2 rotatable in a circumferential direction R of a pipe 1 around the pipe 1 and attaching a cutter 32 having a milling cutter 3 to the rotary body;

a thin-wall forming step of forming a bottomed concave groove G formed by a thin wall 1S and long in the circumferential direction R in the pipe 1 by turning the cutting tool 3 in the circumferential direction R of the pipe 1 together with the rotary body 2 while rotating the cutting tool 3 in a milling cutter shape around the central axis 30 of the tool, thereby cutting the outer surface 13 of the pipe 1;

a removal step of removing a chip T generated by the cutting; and

and an opening forming step of forming an opening 10 by piercing the thin wall 1S after the thin wall forming step and the removing step are performed.

According to the method of the present invention, instead of forming an opening in the tube 1 with the cutting tool 3, a bottomed groove G is formed. Therefore, there is no risk that the chips T generated when the pipe 1 is cut by the cutting tool 3 intrude into the pipe 1.

On the other hand, the bottom of the groove G is formed by a thin wall 1S. Therefore, by piercing the thin wall 1S, the opening 10 can be formed without generating the chip T.

On the other hand, the piping structure of the present invention is a piping structure in which a pipe 1 is combined with a partition valve body 4, and includes:

a tube 1 defining a bottomed groove G extending in a circumferential direction R and formed by a thin wall 1S;

a case 20 surrounding a part of the pipe 1 including the bottomed groove G;

a partition valve body 4 disposed in the housing 20; and

a valve rod 43 for moving the partition valve body 4 so that the partition valve body 4 approaches the groove G and the thin wall 1S of the groove G with a bottom is pierced to form an opening 10,

the partition valve body 4 includes:

a valve body 40 entering the inside of the pipe 1 and having a circular shape;

a blade 41 provided on the front end side of the valve main body 40 to pierce the thin wall 1S and form the opening 10; and

and a seal portion 42 provided on a proximal end side opposite to the distal end side and contacting a portion around the opening 10 of the tube 1 to close the opening 10.

According to the present invention, the blade 41 for piercing the thin wall 1S is in contact with the inner circumferential surface of the pipe 1, and the seal portion 42 is in contact with the portion around the groove G of the pipe 1, thereby sealing the upstream side and the downstream side in the pipe 1.

When the tube 1 is made of a plastic or an elastomer, the seal portion may be made of a metal. On the other hand, when the existing pipe 1 is a steel pipe or the like, the seal portion may be formed of an elastic body. As the elastomer, a thermoplastic resin, latex, or the like may be used in addition to the vulcanized rubber.

Drawings

Fig. 1A and 1B are a cross-sectional view and a vertical-sectional view, respectively, illustrating a surrounding process of the non-stop method according to example 1.

Fig. 2A and 2B are a cross-sectional view and a vertical-sectional view, respectively, illustrating a thin-wall forming step of the non-stop method according to example 1.

Fig. 3A and 3B are a cross-sectional view and a vertical-sectional view, respectively, illustrating a thin-wall forming step of the non-stop method according to example 1.

Fig. 4A and 4B are a cross-sectional view and a vertical sectional view, respectively, illustrating another method for recovering chips.

Fig. 5A and 5B are a transverse sectional view and a longitudinal sectional view, respectively, illustrating an assembly process of the non-stop method according to example 1.

Fig. 6A and 6B are a cross-sectional view and a vertical-sectional view, respectively, illustrating a step of forming an opening in the non-stop method according to example 1.

Fig. 7A and 7B are a cross-sectional view and a vertical-sectional view, respectively, illustrating a step of forming an opening in the non-stop method according to example 1.

Fig. 8A and 8B are a transverse sectional view and a longitudinal sectional view, respectively, illustrating an insertion step of the non-stop method according to example 1.

Fig. 9 is a longitudinal sectional view showing the cutting tool according to example 1, together with a partition valve body, enlarged together with an existing pipe.

Fig. 10 is a schematic perspective view showing the steps of the non-stop method according to example 1.

Fig. 11 is a schematic perspective view showing the steps of the non-stop method according to example 1.

In fig. 10 and 11, the thin portion is shown in gray to clarify the structure.

Fig. 12 is a schematic perspective view, front view, side view, cross-sectional view, and vertical sectional view showing the structure of the partition valve according to example 1.

Fig. 13 (a) is a perspective view showing a blade and a partition valve according to a modification of example 1, and fig. 13 (b) to (e) are views showing the structure of the partition valve according to the modification.

Fig. 14A and 14B are a vertical sectional view and a lateral sectional view, respectively, illustrating a cutting tool and a cutter according to example 2.

Fig. 15A and 15B are a vertical sectional view and a lateral sectional view, respectively, showing a thin-wall forming step of example 2.

Fig. 16A and 16B are a vertical sectional view and a horizontal sectional view, respectively, illustrating an assembly process of example 2.

Fig. 17A and 17B are a vertical sectional view and a horizontal sectional view, respectively, showing the insertion step of example 2.

Fig. 18A, 18B, and 18C are a plan view, a front view, and a side view of the case according to embodiment 3, respectively.

Fig. 19 is a schematic perspective view, front view, side view, cross-sectional view, and vertical sectional view showing the structure of the partition valve according to embodiments 2 and 3.

Fig. 20 is a schematic perspective view showing a process of the non-stop method according to example 4.

Fig. 21 is a schematic perspective view showing the steps of the non-stop method according to example 4. In fig. 21 and 22, in order to clarify the structure, the thin portion of the iron pipe is shown in gray, and the portion of the mortar lining is shown in a dot pattern.

Fig. 22 is a vertical cross-sectional view showing the process of example 4 in an enlarged manner together with an existing pipe.

Fig. 23 (a) is a perspective view showing a blade according to example 5, and fig. 23 (b) to (d) are cross-sectional views showing a method according to example 7.

Fig. 24 is a perspective view of an existing pipe showing a step of the non-stop method according to example 6.

Fig. 25A and 25B are a cross-sectional view and a side view of the existing pipe, respectively.

Fig. 26 (a) is a perspective view showing a blade according to example 6, and fig. 26 (b) to (d) are cross-sectional views showing a method according to example 6.

Fig. 27 is a sectional view showing a step of the non-stop method according to example 7.

Detailed Description

In a preferred method, in the surrounding step, a cutter 32 having a cutter-like shape as the cutting tool 3 is attached to the housing 20.

In this case, the bottomed recess can be formed with high accuracy by the milling cutter-like cutting tool 3.

In a preferred method, the cutting tool 3 is rotated together with the housing 20 in the circumferential direction R of the pipe 1 while rotating the milling cutter-shaped cutting tool 3 about the central axis 30 of the tool, thereby forming the bottomed groove G which is long in the circumferential direction R.

By rotating the cutting tool 3 together with the housing 20, the bottomed recess G can be formed with high accuracy by the milling cutter-like cutting tool 3. Therefore, the thin wall 1S can be set to an appropriate thickness, the fluid can be sealed in the tube 1, and the thin wall 1S can be easily pierced with a blade.

In a preferred method, the method further comprises: and an insertion step of inserting the partition valve body 4 into the pipe 1 through the opening 10. In this case, the partition valve body 4 may be inserted into the pipe 1.

In a preferred method, the method further comprises: and a step of forming a coating film 6 on the surface of the groove G of the pipe 1 after the thin-wall forming step and the removing step are performed and before the step of forming the opening 10.

Rust prevention can be easily performed by forming a coating film on the surface of the pipe 1 before forming the opening.

In a more preferred method, the partition valve body 4 includes:

a valve body 40 entering the inside of the tube 1 and being circular; a blade 41 provided on the front end side of the valve main body 40 and piercing the thin wall 1S to form the opening 10; and

a seal portion 42 provided on a proximal end side opposite to the distal end side and configured to close the opening 10 by contacting a portion of the tube 1 around the opening 10,

the step of forming the opening 10 by piercing the thin wall 1S with the blade 41 of the partition valve body 4 is performed,

the valve body 40 that partitions the valve body enters the pipe 1, the seal portion 42 contacts a portion of the pipe 1 around the opening 10, and the tip end side of the valve body 40 contacts the inner peripheral surface 14 of the pipe 1, thereby performing the insertion step.

In this case, the thin wall 1S is pierced by the blade 41 provided in the partition valve body 4, the valve body 40 of the partition valve body 4 is in contact with the inner peripheral surface 14 of the pipe 1, and the partition valve body 4 is inserted into the pipe 1. Therefore, the valve insertion can be performed even if the valve for operation is not provided.

In a more preferred method, the grooves G extend in the circumferential direction R of the pipe 1,

the thin wall 1S is formed such that the thickness of the central portion in the tube axis direction S is thinner than that of both sides in the tube axis direction S,

the opening forming step of forming the opening 10 is performed by the blade 41 piercing the thin center portion.

The thin wall 1S, which is thinner at the center portion than at both sides, can be easily formed by an end mill having a mountain-shaped tip or a shoulder.

Further, the blade 41 of the partition valve body 4 is pressed against the center portion thinner than both sides, so that the center portion is easily broken, and the reproducibility is high, and the reliability of stopping the water flow is improved.

In a preferred piping structure, the blade 41 of the valve body 40 is made of metal,

the metal blade 41 of the valve main body 40 in the closed state is in contact with the inner peripheral surface 14 of the pipe 1, and the seal portion 42 is in contact with a portion around the groove G of the pipe 1.

When the pipe 1 is, for example, a steel pipe, the metal blade 41 pierces the thin wall 1S and enters the pipe 1, and then contacts the inner circumferential surface 14 of the pipe 1 to seal the upstream side and the downstream side of the pipe 1.

On the other hand, the seal portion 42 contacts the periphery of the groove G of the pipe 1 and seals the vicinity thereof.

A preferred pipe construction method includes:

an assembling step of assembling a rotary body 2 rotatable in a circumferential direction R of the pipe 1 around the pipe 1 and attaching a cutter 32 having a cutter-like cutting tool 3 to the rotary body;

a thin-wall forming step of forming a bottomed concave groove G formed by a thin wall 1S and long in the circumferential direction R in the pipe 1 by turning the cutting tool 3 in the circumferential direction R of the pipe 1 together with the rotating body while rotating the cutting tool 3 in a milling cutter shape around the central axis 30 of the tool, thereby cutting the outer surface 13 of the pipe 1;

a removal step of removing a chip T generated by the cutting;

a step of detaching the rotating body and the cutter 32 from the tube 1; and

and a step of fitting the housing 20 to the pipe 1 so that the housing 20 having the partition valve body 4 built therein surrounds a part of the pipe 1 including the recessed groove G having a bottom.

In this case, a structure may be adopted in which the tube 1 is smoothly rotated around the circumference by using a rotating body different from the case 20.

The rotating body may include a plurality of rollers that are in rolling contact with the surface of the pipe.

After the formation of the groove G, the rotator and the cutter are removed, and a housing different from the rotator is fitted to the tube 1. The assembled housing may also be divided in the circumferential direction of the tube or the groove G may be covered around such a neck flange form. Alternatively, the housing may be welded to the pipe 1.

Features that are described and/or illustrated with respect to one or more of the various embodiments or examples below may be used in the same or similar ways in one or more other embodiments or examples, and/or in combination with or instead of the features of the other embodiments or examples.