TW201942498A - Uninterrupted flow construction method and device - Google Patents

Abstract

This uninterrupted flow construction method comprises a perforation step for perforating an existing pipe with a hole saw, and a plug insertion step for inserting a plug into the existing pipe from a cut groove, wherein the construction method comprises: a step for preparing, prior to the perforation step, a T-shaped pipe having a semicircular groove cut in a branch pipe section over half of the circumferential direction thereof; a connection step for connecting, after the perforation step, a piping material to the branch pipe section of the T-shaped pipe; and after the connection step, a step for taking out a first gate that has been inserted into the semicircular groove. In the plug insertion step, the first gate is inserted as the plug into the existing pipe from the cut groove.

Description

Continuous flow method and device

The present invention relates to a continuous flow method and device.

Conventionally, in order to install a branch pipe in an existing pipeline, a method of performing continuous flow perforation and plug insertion in two places is known.

The well-known continuous water perforation method for setting branch piping is to install the body portion of a T-shaped pipe having a body portion and a branch pipe portion on an existing pipe, and open and close a gate that opens and closes the branch pipe portion. Existing pipe perforation method.
On the other hand, the plug insertion method is to install a shell on the existing pipe, and rotate an end mill disposed in the shell together with the shell to form a cutting groove cut across a half-circle. The method of inserting the plug into the existing pipe is well known.
[Prior technical literature]
[Patent Literature]

[Patent Document 1] US7021325B2 (Homepage)

In the aforementioned continuous water perforation method, one gate is required as an operation valve. In the case where the diameter of the perforation is large, the aforementioned gate is not only a large valve body, but also a larger valve box, which becomes a cause of high cost. In addition, a large space is required above the branch pipe portion.

On the other hand, in the aforementioned plug insertion method, a gate and a butterfly valve are required as the plug. These gates and valves, as well as the follower wheels attached to them, have been developed by their respective manufacturers, and are significantly more expensive than standard products. This is the reason for the high cost.

An object of the present invention is to reduce the cost of the operation valve and the plug in the two aforementioned methods, and in particular, reduce the cost of the gate of the operation valve in the continuous flow method.

A first aspect of the present invention is a continuous flow method, which includes installing the main body portion 41 of a T-shaped pipe 4 having a main body portion 41 and a branching pipe portion 42 on an existing pipe 1 to install a branch pipe, and opening and closing the branching portion. The first gate G1 opened and closed by the tube portion 42 is a perforation process in which the existing pipe 1 is perforated by a hole saw H; and a case 5 is installed in the existing pipe 1 and an end mill E and an end mill disposed in the case 5 The shell 5 rotates together to form a cutting groove 10 cut across a half-circle, and a pipe plug is inserted into the existing pipe 1 from the cutting groove 10, and a pipe plug insertion process is prepared before the perforation process. The portion 42 has a process of the T-shaped pipe 4 of the half-peripheral groove 20 cut across a half circumference of the circumferential direction R; and a pipe material 6 is connected to the branch pipe portion 42 of the T-shaped pipe 4 after the perforating process. A connection process; and a process of removing the first gate G1 inserted into the half pipe groove 20 from the branch pipe portion 42 after the aforementioned connection process; during the plug insertion process, the first gate G1 or The other first gates of the same shape and structure as the first gate G1 As the door plug 10 is inserted from the groove cutting both the inner tube 1.

In this point of view, the first gate used for the operation in the perforation process or another first gate that can be used in the perforation process is inserted into the existing pipe 1 as a pipe plug. Therefore, it is possible to use the work gate for the perforation process and the gate for the pipe plug as one first gate. Therefore, the cost for branch piping becomes cheap.

In particular, not only the development cost, design cost, and storage cost of the first gate become cheaper, but the tank that houses the first gate and the second gate for inserting and recycling the first gate can also be shared, which can achieve obvious results. Cost reduction.

The continuous flow device according to the second aspect of the present invention is a continuous flow device for perforation having a first gate G1 in the branch pipe portion 42 of the T-shaped pipe 4, and is formed in the branch pipe portion 42 of the T-shaped pipe 4. A semicircle groove 20 cut across a semicircle in the circumferential direction R, the semicircle groove 20 includes a pair of semicircular shaped portions 21 that are convex downward at both ends, and the semicircular shaped portions 21 extend in the circumferential direction R to each other. The groove portion 22 having a constant width, and the first gate G1 includes a valve body 11 including a circular portion inserted into the branch pipe portion 42 from the half-peripheral groove 20, and a side portion protruding toward the valve body 11. A pair of valve body side portions 12 and a pair of guides 13 extending downward from the valve body side portions 12 and a sealing rubber gasket 14 are provided. The rubber gasket 14 includes: A band-shaped pair of upper portions 15 in contact with the upper half of the circular portion and a pair of parallel first end faces defining the groove portion 22; and a lower half of the circular portion, and The band-shaped lower portions 16 in which the inner peripheral surfaces of the branch pipe portions 42 contact; and A pair of intermediate portions 17 provided on both sides of the valve body 11; the upper portion 15 of the pair is connected from above and the lower portion 16 is connected to each of the intermediate portions 17 from below. The semi-cylindrical portion 18 in which the circular-shaped portion is fitted. Each of the intermediate portions 17 includes an upper surface F0 that is joined to the lower surface of the valve body side portion 12 and a first side surface F1 that is joined to the side surface of the valve body 11. And the second side surface F2 joined to the guide 13.

In this viewpoint, a half-peripheral groove 20 is formed in the branch pipe portion 42 of the T-shaped pipe 4 so as to be cut across a half-perimeter of the circumferential direction R. This half-circle groove 20 may have the same shape as the cutting groove 10 formed by cutting the existing pipe 1 with an end mill. Therefore, the first gate G1, which is an operation valve for perforation, can be used as a gate for inserting a plug.
The first gate G1 is not used as a gate for inserting a pipe plug, but may be used as an operation valve for a perforation.

The intermediate portion 17 of the rubber gasket 14 for sealing is a semi-cylindrical portion 18 having a semi-circular portion 21 fitted into the semi-circle groove 20. The semicircular shape portion 21 has a complicated shape having a three-dimensional (three-dimensional space). On the other hand, the semi-cylindrical portion 18 has a simple shape and is easy to design and manufacture. Therefore, the cost reduction of the first shutter G1 can be achieved.

In addition, the intermediate portion 17 has a larger amount than the band-shaped upper portion 15 and lower portion 16. Therefore, the compression amount is large, and the sealing function of the first gate G1 can be improved.

A continuous flow device according to a third aspect of the present invention is a continuous flow device for perforation. The continuous flow device includes a T-shaped tube 4 including a main body portion 41 and a branch pipe portion 42 and a first gate G1. A semi-peripheral groove 20 is formed that is cut across the semi-circumference in the circumferential direction R. The first gate G1 enters the branch pipe portion 42 from the semi-circle groove 20 to prevent the fluid in the branch pipe portion 42 from flowing toward the semi-circle groove. The first tube portion 44 extending directly above 20 and defining the first entrance / exit path 43 of the first gate G1 is coupled to the branch pipe portion 42 and is provided to move forward and backward in parallel with the radial direction of the branch pipe portion 42. A second gate G2 that opens and closes the first entrance and exit passage 43 is provided with a sheath 2 that accommodates the second gate G2 when the second entrance G2 opens the entrance and exit passage 43 and is provided in the first barrel portion 44. A first mounting flange 45 for mounting the sheath 2 containing the second gate G2 is provided, and a small valve body is provided at a portion inside the first mounting flange 45 of the first cylinder portion 44. The first storage portion 46 of V is provided by removing the small valve body V in the first storage portion 46 from the first barrel portion. An operation portion 31 for opening and closing the outer side of 44 to attach and detach the sheath 2.

In this point of view, not only the first gate G1 for the punching operation can be recovered, but also the second gate G2 and the sheath 2 for the recovery of the first gate G1 can be removed, and only the small valve body V remains. Therefore, the cost of perforation can be significantly reduced.
In addition, the continuous flow device for perforation may be used as a work valve when the perforation works are not accompanied by insertion of a plug.

In particular, the second gate G2 moves parallel to the radial direction of the branch pipe portion 42. Therefore, the second gate G2 has a plate shape with a small width and a small valve body V. The small opening and closing of the small width and thickness of the gate G2. Therefore, the small valve body V remaining in the pipeline is remarkably small, and cost reduction can be achieved.

Preferably, in the process of inserting the pipe plug, the first gate G1 is inserted into the existing pipe 1 from the cutting groove 10 as the pipe plug.

In this case, the first gate G1, which is an operating valve for continuous flow perforation, is used as a stopper for inserting a continuous flow plug. Therefore, two gates can be perforated and plugged by one gate. Therefore, construction costs are reduced.

Preferably, after the perforation process, the butterfly valve as the piping material 6 is connected to the branch pipe portion 42 and the connection process is performed. When the butterfly valve is closed, the first gate is implemented. The process of removing G1 from the branch pipe section 42 described above.

In this case, the butterfly valve can be connected to the branch pipe portion 42 instead of the first gate G1, and the underground valve and the valve chamber can be made compact. In addition, a portion protruding above the branch pipe portion 42 is reduced.

Preferably, a process of connecting a branch pipe to the butterfly valve; and a process of preventing the fluid from flowing into the existing pipe 1 by the first gate G1 after the branch pipe is connected.

Thereby, the fluid can be prevented from flowing into the existing pipe 1 after the fluid flows through the branch pipe.

Preferably, the branch pipe portion 42 is a first tube portion 44 having a first inlet / outlet path 43 which extends directly above the half-peripheral groove 20 and defines the first gate G1 of the first gate G1, and further includes: The second gate G2 of the first entrance / exit path 43 is opened and closed parallel to the radial direction of the 42 and moves forward and backward in the horizontal direction. The installation of the second gate G2 in the branch pipe section 42 executes the first entrance / exit path 43 by the second gate G2 The process of opening and closing the first shutter G1 from the branch pipe section 42.

By removing the first gate G1 from the branch pipe section 42 in this manner, the first gate G1 can be used as an operation valve multiple times.

Preferably, the case 5 is a second tube portion 54 having a second inlet / outlet path 53 that extends directly above the cutting groove 10 and defines the first gate G1, and further includes: moving the second gate G2 from the first A process of removing the first cylinder portion 44; and a process of installing the second gate G2 that opens and closes the second entrance and exit passage 53 in the second cylinder portion 54 in parallel with the radial direction of the casing 5 and advances and retreats in the horizontal direction. And the process of opening and closing the second entrance / exit path 53 by the second gate G2, and removing the first gate G1 inserted into the existing pipe 1 from the existing pipe 1.

In this case, the continuous flow perforation and the continuous flow pipe plug can be inserted by one first gate G1, and the aforementioned first gate G1 can be used in the next and subsequent constructions, which can achieve a significant cost reduction and shorten the delivery time. .

Each of the foregoing embodiments or features described and / or illustrated in association with the following embodiments may be the same or similar to one or more other embodiments or other embodiments. , And / or in combination with other implementations or features of the embodiment, or use them instead.

The present invention will be clearly understood from the following description of the preferred embodiment with reference to the attached drawings. However, the examples and drawings are only for illustration and explanation, and should not be used to determine the scope of the present invention. The scope of the invention is determined solely by the scope of the request. In the supplementary drawing, the same part symbol in the plural drawing shows the same or a considerable part.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
This example illustrates a case where the existing pipe 1 is an iron pipe.

As shown in FIG. 1, this method is a continuous flow method in which a branch pipe is installed under a continuous flow (continuous water) by inserting a perforation process and a plug insertion process. In this method, the first gate G1, which is a working gate used in the perforation process, is inserted into the existing pipe 1 from the cutting groove 10 as a pipe plug.

The perforation process shown in FIG. 2 and FIG. 3 is to install a branch pipe. The main body 41 of the T-shaped pipe 4 having the main body 41 and the branch pipe 42 is installed in the existing pipe 1. The first gate G1 opened and closed by the branch pipe portion 42 is a process in which the existing pipe 1 is perforated by the hole saw H under constant water.

On the other hand, in the plug insertion process of FIGS. 14 to 21, the casing 5 is installed in the existing tube 1 and the end mill E disposed in the casing 5 is moved along the existing casing 5 along with the casing 5. The outer circumference of the tube 1 is rotated to form a cutting groove 10 that is cut across a half circumference, and a pipe plug is inserted into the existing tube 1 from the cutting groove 10.

Prior to the detailed description of this method, a continuous flow device for perforation including the T-tube 4 and the first gate G1 used in the method will be described.

As shown in FIG. 2 and FIG. 3, the continuous flow device is a T-shaped pipe 4 and a first gate G1 including a body portion 41 and a branch pipe portion 42.

The branch pipe portion 42 is an iron pipe having the same inner diameter and outer diameter as the existing pipe 1. A half-peripheral groove 20 cut in a half-circumference in the circumferential direction R in the branch pipe portion 42 is formed in advance. The first gate G1 enters into the branch pipe portion 42 from the half-peripheral groove 20 to prevent the fluid in the branch pipe portion 42 from flowing.

A first tube portion 44 extending directly above the half-peripheral groove 20 and defining the first entrance / exit path 43 of the first gate G1 is coupled to the branch pipe portion 42.

The device is provided with a second gate G2, a sheath 2 and a first mounting flange 45.

That is, the second shutter G2 opens and closes the first entrance / exit passage 43 in parallel with the radial direction of the branch pipe portion 42 and moves forward and backward in the horizontal direction. When the second gate G2 opens the access path 43, the sheath 2 accommodates the second gate G2. The first cylindrical portion 44 is provided with an installation flange 45 for installing the sheath 2 including the second gate G2.

A first housing portion 46 of a small valve body V is provided in a portion inside the mounting flange 45 of the first cylinder portion 44. It is provided with an operation part 31 for preventing the fluid from flowing out by opening and closing the small valve body V in the first receiving part 46 from the outside of the cylindrical part 44, and assembling and disassembling the sheath 2 can be performed underwater. .

As shown in FIGS. 3 to 5, a half-peripheral groove 20 is formed in the branched tube portion 42 of the T-shaped pipe 4 and cut across a half-perimeter of the circumferential direction R. The semicircular groove 20 of FIG. 4 includes a pair of semicircular shaped portions 21 that are convex downward at both ends and a groove portion 22 of a certain width extending in the circumferential direction R to connect the semicircular shaped portions 21 to each other.

The first gate G1 of FIGS. 6 and 7 includes a valve body 11 provided with a circular portion 11 c inserted into the branch pipe portion 42 from the half circumferential groove 20, and a side facing the valve body 11. A pair of protruding valve body side portions 12, a pair of guides 13 extending downward from the valve body side portions 12, and a rubber gasket 14 for sealing.

The rubber gasket 14 includes a pair of upper portions 15, a lower portion 16, and a pair of intermediate portions 17.
In addition, in a part of the drawing, the portion of the rubber gasket 14 is shown in gray.

The upper portion 15 of the pair in FIG. 7 is an edge 15e attached to the upper half of the circular portion 11c of the valve body 11 and is parallel to the pair of the groove portions 22 defining the half-peripheral groove 20 in FIG. 4 A band shape in which the end surface 22f contacts. The lower portion 16 of FIG. 7 is a band shape that is attached to the edge 16e of the lower half of the circular portion 11c of the valve body 11 and contacts the inner peripheral surface of the branch pipe portion 42 of FIG. Each of the intermediate portions 17 in FIG. 7 is mounted on both sides of the valve body 11.

In each of the intermediate portions 17 in FIG. 7 (b), the pair of upper portions 15 are connected from above, and the lower portion 16 is connected from below. Each of the intermediate portions 17 in FIG. 6 is a semi-cylindrical portion 18 having a semi-circular shape portion 21 fitted in the semi-circular groove 20.

Each of the intermediate portions 17 in FIG. 7 includes an upper surface F0 (FIG. 6) joined to a lower surface of the valve body side portion 12, and a first side surface F1, which is joined to a side surface of the valve body 11, and is joined. On the second side surface F2 of the guide 13.

Prior to the perforating process, the T-shaped pipe 4, the first gate G1, the second gate G2, the upper tank 7, and the like shown in FIGS. 2 to 5 are prepared in advance.
In this example, the existing pipe 1 is an iron pipe.

A base end of the branch pipe portion 42 is integrally connected to the body portion 41. When the existing pipe 1 is an iron pipe, the T-shaped pipe 4 including the body portion 41 is preferably made of iron that can be welded to the existing pipe 1 on site. In this case, the main body portion 41 may be a curved plate having a cylindrical surface, and a cylindrical tube having a larger diameter than the existing tube 1 may be divided into two.

In the branched pipe portion 42 of the T-shaped pipe 4 in FIG. 3, as described above, a half-peripheral groove 20 is formed that is cut across a half-perimeter of the circumferential direction R. A circular flange 42f is provided on the tip of the branch pipe portion 42 to mount a well-known puncher (not shown). In addition, in each of the flanges such as the circular flange 42f, a plurality of through holes (not shown) are formed in order to allow bolts to pass through.

The upper tank 7 is attached to the branch pipe portion 42 of FIG. 2 and the integrated first upper tube portion 44 through a square flange 44f. The upper tank 7 shown in FIG. 2 is the first gate G1 in the opened state, so the upper tank 7 shown in FIG. 3 is connected to the first inlet / outlet path 43.

In addition, a butterfly valve, a first cover plate 47, and the like, which are piping materials 6 installed after perforation in FIG. 10, are prepared in advance. The butterfly valve as the piping material 6 replaces the first gate G1 (FIG. 8) to prevent the fluid from flowing out of the branch pipe portion 42.

The butterfly valve of FIG. 10 may be a commercially available product, for example, a flangeless butterfly valve may be used. This butterfly valve is clampedly connected to the branched pipe portion 42 between the circular flange 42f of the branched pipe portion 42 and a short flanged pipe (not shown).

Next, the details of the punching process will be described.

First, as shown in FIG. 2, the main body portion 41 of the T-shaped pipe 4 is attached to the existing pipe 1 by welding. In addition, in the case where the existing pipe 1 is a cast iron pipe, the main body portion 41 may be configured by connecting the plural divided shells to each other so as to surround the existing pipe 1.

Then, the upper tank 7 in which the first gate G1 of FIG. 2 is accommodated is a square flange 44f assembled in the cylindrical portion 44. The sheath 2 that houses the second shutter G2 is a first mounting flange 45 that is assembled in the first cylindrical portion 44.

Thereafter, as is well known, the punch having the hole saw H shown in FIG. 3 is a circular flange 42 f mounted on the branch pipe portion 42. When the first gate G1 is opened, the hole saw H is moved toward the existing pipe 1. If the hole saw H is moved forward while rotating, the branch hole H0 shown by the dotted line is perforated in the existing pipe 1.

After the aforementioned perforation, after the hole saw H retreats, the first gate G1 descends downward through the first access path 43. As shown in FIGS. 5 and 8, the first gate G1 enters the branch pipe portion 42 from the semicircle groove 20, The first gate G1 is in a closed state. In this valve-closed state, the first gate G1 prevents fluid from flowing out of the branch pipe portion 42.

In the aforementioned closed state of FIG. 6, the upper portion 15 of the rubber gasket 14 of the valve body 11 is in contact with the end surface 22 f (FIG. 4) of the groove portion 22 of the semi-peripheral groove 20. The intermediate portion 17 of the valve body 11 is in contact with the end surface 21f (FIG. 4) of the semicircular portion 21 of the semicircle groove 20. The lower portion 16 of the valve body 11 is in contact with the inner peripheral surface of the branch pipe portion 42.

After the perforation process, a connection process of connecting the butterfly valve as the piping material 6 to the branch pipe portion 42 of the T-shaped pipe 4 of FIG. 9 is performed. The butterfly valve is connected in a closed state.

After the connection process, as shown in FIG. 9, in a state in which the butterfly valve is closed, the first gate G1 inserted into the half-peripheral groove 20 is pulled from the branch pipe portion 42 toward the upper tank 7 and the first The gate G1 is accommodated in the upper tank 7. At this time, the first gate G1 is opened and closed by the second gate G2 to remove the first gate G1 from the first tube portion 44 of the branch pipe portion 42.

After the above-mentioned pull-up, the operating portion 31 of FIG. 2 is operated, and the small valve body V of FIG. 2 is rotated as shown in FIG. The radial direction of 42 is parallel, and advancing in the horizontal direction closes the entry / exit path 43 of the first gate G1.

In this way, after the access path 43 in FIG. 9 is closed, the first gate G1 is removed from the first cylinder portion 44 together with the upper tank 7. After this is removed, the first cover 47 is attached to the square flange 44f of the first cylindrical portion 44 in FIG. 10, and the first inlet-outlet path 43 of the first cylindrical portion 44 is closed. Thereafter, as shown in FIG. 10, the second gate G2 is retracted into the sheath 2 and stored.

After the aforementioned storage, the operation section 31 (FIG. 2) of FIG. 2 is rotated, and the entrance / exit opening 33 is closed as shown in FIG. 11 (b). The second shutter G2 is removed from the first mounting flange 45 together with the sheath 2 in a state where the access opening 33 is closed.

After this is removed, as shown in FIGS. 13 and 12, the second cover plate 48 is coupled to the first mounting flange 45. Thereby, the access opening 33 is completely closed. Furthermore, after connecting the necessary branch pipe to the butterfly valve, as is well known, the fluid is prevented from flowing to the existing pipe 1 described later.

Next, before the explanation of the aforementioned plug insertion process, the device used in this process will be described. This device uses the removed first and second gates G1, G2, and the like of FIG. 20 after the piercing process in addition to the milling device M of FIG. 14.

The milling device M of FIG. 14 includes a closed casing 5 and a cutter 8. The closed casing 5 and the cutter 8 form a cutting groove 10 indicated by a broken line in the existing tube 1. First, the closed case 5 will be described.

The closed casing 5 is a structure in which the first and second divided casings 51 and 52 divided into two upper and lower portions are welded to each other on site. This closed casing 5 surrounds a part of the existing tube 1. The first and second divided shells 51 and 52 may be made of cast iron, or they may be coupled to each other by assembling bolts.
Moreover, as is well known, the sealed casing 5 and the existing tube 1 are sealed by a rubber gasket.

The first divided case 51 among the two divided cases is a second cylindrical portion 54 having the same shape and structure as the cylindrical portion 44 of the T-shaped tube 4 (FIG. 1).

That is, the second cylindrical portion 54 of FIG. 20 extends directly above the cutting groove 10, and as shown in FIG. 20, the second entrance / exit path 53 of the first gate G1 is defined.

The second tube portion 54 of FIG. 20 is provided with a second mounting flange 55 for mounting the sheath 2 containing the second gate G2. A second receiving portion 56 of a second small valve body V2 is provided in a portion inside the second mounting flange 55 of the second cylindrical portion 54 of FIG. 16.
It is provided with: by opening and closing the second small valve body V2 in the second accommodating portion 56 from the outside of the second cylinder portion 54 to prevent fluid from flowing out, the loading and unloading of the sheath 2 can be continuously performed underwater 2nd operation part (not shown). The structure and shape of the second operation portion are the same as those of the first operation portion, and a description thereof is omitted.

Next, a milling method for forming a cutting groove 10 in the existing pipe 1 by the end mill E of the cutting blade 8 shown in FIG. 16 will be described.

Assembly process:
First, as shown in FIG. 14, a part of the existing tube 1 is surrounded by the shell 5 in an airtight state. That is, the first divided case 51 and the second divided case 52 are welded to each other, and the existing pipe 1 is held up and down. The cutter 8 is attached to the first divided case 51 through a square flange 54f.
The fourth cover plate 58 is coupled to the second mounting flange 55.

Cutting process:
Thereafter, as shown by the solid line and the two-point lock line in FIG. 15, the end mill E of the cutter 8 is moved toward the center O of the existing pipe 1 to move the end mill E of the cutter 8 to the existing pipe. A part of the pipe wall of 1 is cut, and while the end mill E of the cutter 8 is rotated, the entire milling device M of FIG. 15 is rotated in the circumferential direction R of the existing pipe 1, and as shown in FIG. A part of the tube 1 is perforated to form a cutting groove 10 spanning a half circumference.

In this way, the shape and size of the cut groove 10 to be cut are the same as those of the half-circle groove 20 in FIG. 2.

That is, as shown in FIG. 15 and FIG. 18, the existing pipe 1 is formed with a cutting groove 10 that is cut across a half circumference of the circumferential direction R. The cutting groove 10 in FIG. 18 includes a pair of semicircular portions 21 that are convex downward at both ends and a groove portion 22 having a constant width extending in the circumferential direction R and connecting the semicircular portions 21 to each other.

Therefore, the first gate G1 is inserted (entered) into the cutting groove 10 of FIG. 18, and the first gate G1 can prevent fluid from flowing into the existing pipe 1.

In addition, although the cutting range β of the cutting groove 10 in FIG. 15 is approximately 180 °, the rotation angle α of the case 5 is slightly smaller than 180 °.

Exchange process:
Thereafter, the end mill E shown in FIG. 15 is retracted, and as shown in FIG. 17, the sheath 2 containing the second gate G2 is mounted on the second mounting flange 55 of the second tube portion 54, and further, After the second gate G2 in FIG. 18 closes the second entrance / exit path 53, the cutter 8 and the end mill E in FIG. 14 are removed from the square flange 54 f. After this is removed, the upper tank 7 in which the first gate G1 of FIG. 17 is contained is attached to the square flange 54f.

After this exchange process, the second gate G2 in FIG. 18 is retracted from the second entry / exit path 53 and the second entry / exit path 53 is opened. Thereafter, as shown in FIG. 19, the first gate G1 descends downward through the second access path 53, the first gate G1 enters the existing pipe 1 from the cutting groove 10, and the first gate G1 is in a closed state.

In the aforementioned closed state, the upper portion 15 of the valve body 11 in FIG. 18 is in contact with the end surface 22 f of the groove portion 22 of the semi-peripheral groove 20. The intermediate portion 17 of the valve body 11 is in contact with the end surface 21 f of the semicircular portion 21 of the cutting groove 10. The lower portion 16 of the valve body 11 is in contact with the inner peripheral surface of the existing pipe 1.

In this way, the same first gate G1 can be used: the water stop of the existing pipe 1 of FIG. 19 and the water stop of the T-shaped pipe 4 of FIG. 8. That is, both the perforating process for the continuous flow branching of FIG. 8 and the plug insertion process of FIG. 19 can be performed using one first gate G1.

When the first gate G1 is left in the existing pipe 1, for example, when the first gate G1 is provided as a product, a first gate other than the first gate G1 is manufactured in advance. The gate can also be used as a pipe plug.

After the above-mentioned pipe plug insertion process, the above-mentioned first gate G1 is not needed. After the necessary pipework such as cutting off the existing pipe 1 is performed, as shown in FIGS. 19 and 20, The second gate G2 opens and closes the second entrance / exit path 53, and the first gate G1 is pulled upward from the cutting groove 10 of the existing pipe 1 toward the upper tank 7 and the first gate G1 is removed. The removal method after the pull-up is the same as that after the perforation process described above, and its description is omitted.

In this case, as shown in FIG. 21, the perforation construction and the plug insertion construction are completed.
A third cover plate 57 may be attached to the square flange 54f, and a fourth cover plate 58 may be attached to the second installation flange 55.

As described above, the best embodiment has been described with reference to the drawings. However, those skilled in the art can easily think of various changes and corrections without departing from the scope of the patent application based on this specification.
For example, the first gate may be an external bolt gate. The fluid may be oil and gas. The first gate inserted as a pipe plug may be left as a valve. In addition, a butterfly valve is not provided, and branch piping may be completed before the plug is inserted.
Therefore, the above changes and modifications can be regarded as within the scope of the present invention which is limited in the scope of the patent application.

[Industrial availability]

The continuous flow method and device of the present invention can be used in a pipeline in which a partition valve body is inserted into an existing pipe such as a water channel and a gas, and the flow of the fluid can be prevented by the partition valve body inserted thereby.
In addition, the continuous flow method of the present invention can be adopted when a branch pipe is set after continuous water perforation.

1‧‧‧ existing tube

10‧‧‧ cutting groove

11‧‧‧Valve body

11c‧‧‧Circular shape part

12‧‧‧ side of valve body

13‧‧‧Guide

14‧‧‧ rubber gasket

15‧‧‧upper

15e‧‧‧Fate

16‧‧‧ lower

16e‧‧‧Fate

17‧‧‧ middle

18‧‧‧ semi-cylindrical part

2‧‧‧ sheath

20‧‧‧Half Week Gully

21‧‧‧Semicircular shaped part

21f‧‧‧face

22‧‧‧Gully

22f‧‧‧face

31‧‧‧Operation Department

32‧‧‧ 2nd operation section

33‧‧‧Access opening

4‧‧‧T tube

41‧‧‧Body

42‧‧‧Division Division

42f‧‧‧round flange

43‧‧‧The first access route

44‧‧‧ the first cylinder

44f‧‧‧square flange

45‧‧‧The first installation flange

46‧‧‧First Containment Division

47‧‧‧The first cover

48‧‧‧ 2nd cover

5‧‧‧shell

51‧‧‧The first split shell

52‧‧‧ 2nd Split Shell

53‧‧‧ 2nd access route

54‧‧‧ 2nd tube section

54f‧‧‧square flange

55‧‧‧Second installation flange

56‧‧‧Second Containment Department

57‧‧‧3rd cover

58‧‧‧4th cover

6‧‧‧Piping

7‧‧‧ Upper tank

8‧‧‧ cutter

E‧‧‧End Mill

F0‧‧‧above

F1‧‧‧1st side

F3‧‧‧ 2nd side

G1‧‧‧Gate 1

G2‧‧‧Gate 2

V‧‧‧Small valve body

V2‧‧‧The second small valve body

H‧‧‧Hole Saw

H0‧‧‧Divergence hole

M‧‧‧milling device

O‧‧‧ Center

R‧‧‧ circumferential direction

[Fig. 1] A schematic perspective view showing a piping structure according to an embodiment of the method of the present invention.

[Fig. 2] A schematic perspective view of a device used in the punching process.

[Fig. 3] A schematic perspective view of a part of a cross section of a device used in a punching process.

[Fig. 4] (a) and (b) are cross-sectional views of the same device shown in a state where the first gate is opened.

[FIG. 5] FIGS. 5 (a) and (b) are cross-sectional views of the same device shown in a state where the first gate is closed.

[Fig. 6] (a) is a schematic perspective view showing a part of a cross section of a T-shaped pipe in a state where the first gate is closed, and (b) is a schematic perspective view of a rubber gasket.

[Figure 7] (a) and (b) are an exploded perspective view of the first gate and a perspective view of the rubber gasket, respectively.

[Fig. 8] A schematic perspective view showing a part of a cross section in a state where an upper tank and a second gate are installed in a T-shaped pipe.

[FIG. 9] A schematic perspective view showing a part of a cross section of a state where a butterfly valve is further mounted on a T-shaped tube.

[Fig. 10] A schematic perspective view showing a part of a cross section of a state in which an upper tank and a first gate are removed from a T-shaped tube.

[FIG. 11] (a) is a schematic perspective view of a T-shaped tube showing a partial cross section of a state where the small valve body is closed, and (b) is a schematic perspective view of the small valve body and the like.

[Fig. 12] A schematic perspective view showing a part of the cross section of the T-shaped tube in a state where the second gate is removed from the T-shaped tube.

[Fig. 13] A schematic perspective view of the T-shaped tube in a state where the second gate is removed from the T-shaped tube.

14 is a schematic perspective view showing a milling device for forming a cutting groove.

[Fig. 15] A sectional view showing a milling device during cutting.

[FIG. 16] A schematic perspective view of a part of a cross section forming a piping structure in a cutting groove.

[Fig. 17] A schematic perspective view showing a state where the first and second gates are attached to the case instead of the cutter.

[Fig. 18] Figs. 18 (a) and (b) are respectively sectional views showing the same cross-sectional view and the joint portion of the case.

[FIG. 19] A schematic perspective view showing a state where the first gate enters the existing pipe.

[Fig. 20] A schematic perspective view showing a state after the first gate is pulled out from an existing pipe.

[Fig. 21] A schematic perspective view showing a completed pipeline.

Claims (8)

A continuous flow method with: In order to provide a branch pipe, the main body portion (41) of the T-shaped pipe (4) having the main body portion (41) and the branch pipe portion (42) is installed in the existing pipe (1), and the branch pipe portion ( 42) the first gate (G1) opened and closed is perforated by a hole saw (H) to perforate the existing pipe (1); and The shell (5) is installed in the existing pipe (1), and the end mill (E) disposed in the shell (5) is rotated together with the shell (5) to form a cutting groove cut across a half circumference. (10) Inserting a pipe plug into the existing pipe (1) from the cutting groove (10); and Prior to the perforating process, a process of preparing the T-shaped pipe (4) having a half-peripheral groove (20) cut across a half-circumference in the circumferential direction (R) in the branched pipe portion (42); and The connecting process of connecting the piping material (6) to the branch pipe part (42) of the T-shaped pipe (4) after the aforementioned perforating process; and A process of removing the first gate (G1) inserted into the half circumferential groove (20) from the branch pipe section (42) after the aforementioned connecting process; In the process of inserting the plug, the first gate (G1) or another first gate having the same shape and structure as the first gate (G1) is inserted into the cutting groove (10) as the plug. Inside the existing tube (1). For example, the continuous flow method of the scope of patent application, item 1, In the process of inserting the pipe plug, the first gate (G1) is inserted into the existing pipe (1) from the cutting groove (10) as the pipe plug. For example, the continuous flow method of the scope of patent application No. 1 or 2, in which, After the perforation process, a butterfly valve as the piping material (6) is connected to the branch pipe part (42), and the connection process is performed. In a state where the butterfly valve is closed, a process of removing the first gate (G1) from the branch pipe portion (42) is performed. For example, the continuous flow law of the third scope of patent application, in which: The process of connecting a branch pipe to the butterfly valve; and After the branch pipe is connected, the first gate (G1) prevents the fluid from flowing in the existing pipe (1). For example, the continuous flow method of the scope of patent application No. 2 in which The branch pipe portion (42) is a first tube portion (44) having a first inlet / outlet path (43) extending toward the upper half of the semicircular groove (20) and defining the first inlet / outlet path (43) of the first gate (G1). It further includes a second gate (G2) for opening and closing the first access path (43) parallel to the radial direction of the branch pipe section (42) and moving forward and backward in a horizontal direction, and provided in the branch pipe section (42). the process of, The first gate (G1) is opened and closed by the second gate (G2) to remove the first gate (G1) from the branch pipe section (42). For example, the continuous flow method of scope 5 of the patent application, in which, The casing (5) is a second cylindrical portion (54) having a second inlet / outlet passage (53) which extends directly above the cutting groove (10) and defines the first inlet / outlet passage (53) of the first gate (G1), and further includes: The process of removing the second gate (G2) from the first cylinder portion (44); and A process in which the second gate (G2) for opening and closing the second entrance / exit path (53) is opened and closed parallel to the radial direction of the casing (5) in the horizontal direction; and The second gate (G2) opens and closes the second access path (53), and the first gate (G1) inserted into the existing pipe (1) is removed from the existing pipe (1). A continuous flow device, A continuous flow device for perforation having a first gate (G1) in a branch pipe section (42) of a T-shaped pipe (4), A half-peripheral groove (20) is formed in the branched pipe portion (42) of the T-shaped pipe (4) and is cut across a half-perimeter of the circumferential direction (R). The semicircular groove (20) includes a pair of semicircular shaped portions (21) protruding downward at both ends and a groove portion of a certain width extending in the circumferential direction (R) and connecting the semicircular shaped portions (21) to each other. (twenty two), The first gate (G1) includes a valve body (11) including a circular portion inserted into the branch pipe portion (42) from the half-peripheral groove (20), and a side facing the valve body (11). A pair of valve body side portions (12) protruding sideways, a pair of guides (13) extending downward from the valve body side portions (12), and a rubber gasket (14) for sealing, The rubber gasket (14) is provided with: A band-shaped pair of upper portions (15) mounted on the upper half of the circular portion and in contact with the parallel first end faces of the pair defining the groove portion (22); and A band-shaped lower portion (16) mounted on the lower half of the circular portion and in contact with the inner peripheral surface of the branch pipe portion (42); and A pair of middle portions (17) respectively installed on both sides of the valve body (11); The upper part (15) of the pair is connected from above and the lower part (16) is connected to each of the intermediate parts (17) from below, Each of the intermediate portions (17) is a semi-cylindrical portion (18) fitted into the circular portion, Each of the intermediate portions (17) includes an upper surface (F0) joined to a lower surface of the valve body side portion (12), a first side surface (F1) joined to a side surface of the valve body (11), and a joint. On the second side (F2) of the guide (13). A continuous flow device, Is a continuous flow device for perforation, It has a T-shaped tube (4) including a main body portion (41) and a branch tube portion (42), and a first gate (G1), A half-peripheral groove 20 is formed in the branched pipe portion (42) and is cut across the half-periphery in the circumferential direction (R). The first gate (G1) enters the branch pipe section (42) from the half-peripheral groove (20) to prevent the fluid in the branch pipe section (42) from flowing, The first tube portion (44) extending directly above the semicircle groove (20) and defining the first access path (43) of the first gate (G1) is coupled to the branch pipe portion (42), There is provided a second gate (G2) that moves forward and backward in parallel with the radial direction of the branch pipe portion (42), and opens and closes the first access path (43). A sheath (2) for accommodating the second gate (G2) when the second gate (G2) opens the access path (43), The first tube portion (44) is provided with a first mounting flange (45) for mounting the sheath (2) containing the second gate (G2), A first receiving portion (46) of a small valve body V is provided in an inner portion of the first mounting flange (45) of the first cylinder portion (44), An operation unit (31) is provided for opening and closing the sheath (2) by opening and closing the small valve body (V) in the first accommodation portion (46) from outside the first cylinder portion (44). .