TWI744616B - Continuous flow method and device - Google Patents

Abstract

A continuous flow method that has a perforation process in which an existing pipe is perforated by a hole saw and a pipe plug insertion process in which a pipe plug is inserted into the existing pipe from a cutting groove. It has: before the perforation process, prepare for the branch The process of connecting the piping material to the branch pipe part of the T-shaped tube after the perforation process; and after the connecting process, The process of removing the first gate inserted into the half-circumferential groove; during the pipe plug insertion process, the first gate is inserted into the existing pipe from the cutting groove as a pipe plug.

Description

Continuous flow method and device

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

In the past, in order to install branch piping in an existing pipeline, a method of performing continuous flow perforation and pipe plug insertion from two locations has been known.

The well-known continuous water perforation method for installing branch piping is to install the body part of the T-shaped tube with the body part and the branch pipe part on the existing pipe, and the gate that opens and closes the branch pipe part is opened and closed by a hole saw. Existing pipe perforation method. On the other hand, the pipe plug insertion method is to install the shell on the existing tube, and rotate the end mill arranged in the shell together with the shell to form a cutting groove that is cut across half of the circumference. The method of inserting the pipe plug into the aforementioned existing pipe is well known. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] US7021325B2 (Homepage)

In the aforementioned continuous water perforation method, a gate is required as a working valve. When the diameter of the perforation is large, the aforementioned gate not only has a large valve body but also a larger valve box, which is a cause of high cost. Moreover, a large space is required above the branch pipe part.

On the other hand, in the aforementioned pipe plug insertion method, a gate and a butterfly valve as the pipe plug are required. These gates and valves, and the relay wheels attached to these have their own construction methods developed by each manufacturer, and they are significantly more expensive than standard products. This is the main cause of the high cost.

The purpose of the present invention is to achieve the cost reduction of the operation valve and the pipe plug in the aforementioned two construction methods, and in particular, to reduce the cost of the gate of the operation valve in the continuous flow method.

The first aspect of the present invention is a continuous flow method, which includes: in order to install branch pipes, the main body 41 of the T-tube 4 having the main body 41 and the branch pipe 42 is installed in the existing pipe 1, and the branch is opened and closed. The first gate G1 of the tube portion 42 is opened and closed by the hole saw H to perforate the aforementioned existing pipe 1; and the shell 5 is installed on the aforementioned existing pipe 1, and the end mill E and The shell 5 rotates together to form a cutting groove 10 cut across half of the circumference, and a pipe plug insertion process in which the pipe plug is inserted into the existing pipe 1 from the cutting groove 10; The part 42 has the aforementioned T-shaped pipe 4 of the half-circumferential groove 20 cut across the half circumference of the circumferential direction R; and after the aforementioned perforation process, the piping 6 is connected to the aforementioned branch pipe portion 42 of the aforementioned T-shaped pipe 4 The connection process; and after the foregoing connection process, the process of removing the first gate G1 inserted into the half-circumferential groove 20 from the branch pipe portion 42; during the pipe plug insertion process, the first gate G1 may have and Another first gate having the same shape and structure as the first gate G1 is inserted into the existing pipe 1 from the cutting groove 10 as the pipe plug.

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

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

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

In this point of view, the branch pipe portion 42 of the T-shaped tube 4 is formed with a half-peripheral groove 20 cut across a half-periphery in the circumferential direction R. As shown in FIG. This half-circumferential 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 a working valve for piercing construction, can be used as a gate for pipe plug insertion.

In addition, the first gate G1 is not used as a gate for pipe plug insertion, but may be used as a working valve for piercing construction.

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

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

The continuous flow device of the third aspect of the present invention is for perforation The continuous flow device has: a T-shaped tube 4 containing a body portion 41 and a branch pipe portion 42, and a first gate G1. The branch pipe portion 42 is formed with a half-circumferential groove cut across the half circumference of the circumferential direction R 20. The first gate G1 enters the branch pipe portion 42 from the half-circumferential groove 20 to block the flow of fluid in the branch pipe portion 42, and extends directly above the half-circumferential groove 20 to define the first gate G1. 1 The first cylindrical portion 44 of the entry and exit passage 43 is coupled to the branch pipe portion 42 and is provided with a second gate G2 that moves forward and backward in parallel with the radial direction of the branch pipe portion 42 to open and close the first entry and exit passage 43 , There is provided a sheath 2 for accommodating the second gate G2 when the second gate G2 opens the first entry and exit passage 43, and the first cylindrical portion 44 is provided with a sheath 2 for accommodating the second gate G2. The first mounting flange 45 for the sheath 2 is provided with a first receiving portion 46 of a small valve body V in the inner portion of the first mounting flange 45 of the first cylindrical portion 44, and is provided with The operation part 31 that can detach the sheath 2 by opening and closing the small valve body V in the first housing part 46 from the outside of the first cylindrical part 44.

In this view, not only the first gate G1 for piercing operation can be recovered, but the second gate G2 and sheath 2 for recovering the first gate G1 can also be dismantled, and only the small small valve body V remains. Therefore, the cost of perforation can be significantly reduced.

In addition, the continuous flow device for piercing can be used as a working valve when only piercing work does not involve the insertion of a pipe plug.

In particular, the second gate G2 moves parallel to the radial direction of the branch pipe portion 42, and therefore, the second gate G2 has a strip-shaped plate shape with a small width, and the small valve body V is a strip-shaped second gate. 2 small width of gate G2 Open and close with a small opening of high degree and thickness. Therefore, the small valve body V remaining in the pipeline is significantly smaller, and cost reduction can be achieved.

Preferably, during the insertion of the pipe plug, the first gate G1 is used as the pipe plug to be inserted into the existing pipe 1 from the cutting groove 10.

In this case, the first gate G1, which is an operating valve for continuous flow perforation, is used as a pipe plug for continuous flow pipe plug insertion. Therefore, two constructions of perforation and pipe plug insertion can be performed by one gate. Therefore, the cost of fortifications becomes cheaper.

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 closed. The process of removing G1 from the aforementioned branch pipe part 42.

In this case, the butterfly valve can be connected to the branch pipe part 42 instead of the first gate G1, and the underground valve and valve chamber can be made small. In addition, the portion protruding above the branch pipe portion 42 becomes smaller.

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

As a result, after flowing the fluid through the branch pipe, it is possible to prevent the fluid from flowing into the existing pipe 1.

Preferably, the branch pipe portion 42 has a first cylindrical portion 44 that extends directly above the half-circumferential groove 20 and defines the first access passage 43 of the first gate G1, and further includes: The second gate G2 of the first entry-exit passage 43 is opened and closed in parallel with the radial direction of the 42 and moves forward and backward in the horizontal direction, and is installed in the branch pipe part 42. The process of removing the first gate G1 from the branch pipe portion 42 is opened and closed.

In this way, by removing the first gate G1 from the branch pipe part 42, the first gate G1 can be used as an operation valve multiple times.

Preferably, the housing 5 has a second cylindrical portion 54 extending directly above the cutting groove 10 and defining a second access passage 53 of the first gate G1, and further includes: connecting the second gate G2 from the first gate G1 1 The process of removing the cylindrical portion 44; and the process of advancing and retreating in the horizontal direction parallel to the radial direction of the housing 5, and setting the second gate G2 for opening and closing the second access passage 53 in the second cylindrical portion 54 ; And the process of opening and closing the second access passage 53 by the second gate G2, and the first gate G1 inserted into the existing tube 1 is removed from the existing tube 1.

In this case, the continuous flow perforation and continuous flow pipe plug insertion can be performed by a first gate G1, and the aforementioned first gate G1 can be used for the next and subsequent constructions, which can achieve a significant cost reduction and a shortened delivery period. .

The foregoing embodiments or the features described and/or illustrated in connection with the following embodiments may be the same or similar to one or more other embodiments or other embodiments. , And/or combined with other implementation aspects or features of the embodiments, or used instead.

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

Hereinafter, an embodiment of the present invention will be described based on the drawings. This example illustrates the case where the existing pipe 1 is an iron pipe.

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

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

On the other hand, the pipe plug insertion process in Figures 14 to 21 is to install the shell 5 on the existing tube 1, and the end mill E arranged in the shell 5 along with the shell 5 There is a process in which the outer circumference of the tube 1 is rotated to form a cutting groove 10 cut across half of the circumference, and the pipe plug is inserted into the existing tube 1 from the cutting groove 10.

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

As shown in FIGS. 2 and 3, the continuous flow device has a T-shaped tube 4 including a main body 41 and a branch tube 42 and a first gate G1.

The branch pipe portion 42 uses an iron pipe having the same inner diameter and outer diameter as the existing pipe 1. The half-peripheral groove 20 cut across the half-periphery in the circumferential direction R in the aforementioned branch pipe portion 42 is formed in advance. The first gate G1 enters the branch pipe portion 42 from the half-circumferential groove 20 to prevent the fluid flow in the branch pipe portion 42.

The first cylindrical portion 44 that extends directly above the half-circumferential groove 20 and defines the first entry and exit passage 43 of the first gate G1 is connected to the branch pipe portion 42.

In this device, a second gate G2, a sheath 2 and a first installation flange 45 are provided.

That is, the second gate G2 opens and closes the first entry and 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 first access passage 43, the sheath 2 accommodates the second gate G2. The first cylindrical portion 44 is provided with a mounting flange 45 for mounting the sheath 2 containing the second gate G2.

In the portion inside the mounting flange 45 of the first cylindrical portion 44, a first housing portion 46 of a small valve body V is provided. It is provided with an operation section 31 that prevents fluid from flowing out by opening and closing the small valve body V in the first housing section 46 from the outside of the cylinder section 44, and the attachment and detachment of the sheath 2 can be performed continuously under water. .

As shown in FIGS. 3 to 5, the branch pipe portion 42 of the T-shaped tube 4 is formed with a half-peripheral groove 20 cut across a half-periphery in the circumferential direction R. As shown in Figs. The half-circumferential groove 20 in Figure 4 is provided with a pair of semicircular shaped portions 21 that are convex downward at both ends, and extend in the circumferential direction R to extend the A groove portion 22 of a constant width that connects the semicircular portions 21 to each other.

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

The aforementioned rubber gasket 14 includes a pair of upper portion 15, lower portion 16 and a pair of intermediate portions 17.

In addition, in some of the drawings, the location of the rubber gasket 14 is shown in gray.

The upper part 15 of the pair of Fig. 7 is mounted on the edge 15e of the upper half of the circular portion 11c of the valve body 11, and is parallel to the pair of the groove 22 defining the half-circumferential groove 20 of Fig. 4 The end surface 22f is in the shape of a strip in contact with each other. The lower portion 16 in FIG. 7 is a belt-shaped rim 16e attached to the lower half of the circular portion 11c of the valve body 11 and in contact with the inner peripheral surface of the branch pipe portion 42 in FIG. 4. The intermediate portions 17 in FIG. 7 are installed on both sides of the valve body 11, respectively.

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

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

Before the aforementioned perforation process, the T-tube 4, the first gate G1, the second gate G2, and the upper tank 7 shown in FIGS. 2 to 5 are prepared in advance. Also, in this example, the existing pipe 1 is an iron pipe.

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

In the branch pipe portion 42 of the T-shaped pipe 4 in FIG. 3, as described above, a half-peripheral groove 20 cut across a half-periphery in the circumferential direction R is formed. At the tip end of the branch pipe portion 42 described above, a circular flange 42f to which a well-known puncher (not shown) is installed is provided. In addition, in each flange such as the circular flange 42f, a large number of through holes (not shown) are formed in order to allow bolts to pass through.

In the branch pipe portion 42 of FIG. 2 and on the upper surface of the integrated first tube portion 44, the upper tank 7 is installed through a square flange 44f. Since the upper tank 7 in FIG. 2 accommodates the first gate G1 in the valve-opened state, the inside of the upper tank 7 in FIG. 3 is connected to the first access passage 43 described above.

In addition, the butterfly valve, the first cover 47, and the like are prepared in advance as the piping material 6 installed after the perforation shown in FIG. 10. 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 aforementioned butterfly valve in Fig. 10 may be a commercially available product, for example, a flangeless butterfly valve. In addition, this butterfly valve is connected to the branch pipe part 42 while being pinched between the circular flange 42f of the branch pipe part 42 and the flange short pipe which is not shown in figure.

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

First, as shown in FIG. 2, the main body 41 of the T-shaped tube 4 is attached to the existing tube 1 by welding. In addition, when the existing pipe 1 is a cast iron pipe, the main body 41 may be configured by combining a plurality of divided shells to surround the existing pipe 1.

Then, the upper tank 7 accommodating the first gate G1 of FIG. 2 is a square flange 44f assembled to the cylindrical portion 44. In addition, the sheath 2 accommodating the second gate G2 is the first installation flange 45 assembled to the first cylindrical portion 44.

After that, as well known, the piercer equipped with the hole saw H of FIG. 3 is attached to the circular flange 42f of the branch pipe part 42. When the first gate G1 is opened and the hole saw H is moved toward the existing pipe 1 and the hole saw H moves forward while rotating, the branch hole H0 shown by the broken line is perforated in the existing pipe 1.

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

In the closed valve 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 22f (FIG. 4) of the groove portion 22 of the half-peripheral groove 20. In addition, 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 semicircular groove 20. In addition, 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 aforementioned 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 in FIG. 9 is carried out. The aforementioned butterfly valve is connected in a closed state.

After the aforementioned connection process, as shown in Figure 9, in the state where the butterfly valve is closed, the first gate G1 inserted into the half-circumferential groove 20 is pulled up from the branch pipe portion 42 toward the upper tank 7 to pull the first gate G1 into the upper tank 7 The gate G1 is contained in the upper tank 7. At this time, the first gate G1 is removed from the first cylindrical portion 44 of the branch pipe portion 42 by opening and closing the first entry-exit passage 43 by the second gate G2.

After the aforementioned pull up, operate the operating part 31 in Figure 2, and rotate the small valve body V in Figure 2 as shown in Figure 9(b) to open the inlet and outlet opening 33, and the second gate G2 from the inlet and outlet opening 33 and the branch pipe part The radial direction of 42 is parallel, and advances in the horizontal direction to close the first access passage 43 of the first gate G1.

In this case, after the first access passage 43 in FIG. 9 is closed, the first gate G1 is removed from the first cylindrical portion 44 together with the upper tank 7. After this removal, the first cover plate 47 is attached to the square flange 44f of the first cylindrical portion 44 in FIG. 10, and the first access passage 43 of the first cylindrical portion 44 is closed. After that, as shown in Fig. 10, the second gate G2 is retreated into the sheath 2 and stored.

After the aforementioned storage, the operating part 31 (Figure 2) in Figure 2 is rotated to close the access opening 33 as shown in Figure 11(b). The second gate G2 together with the sheath 2 is removed from the first installation flange 45 in a state where the access opening 33 is closed.

After this removal, as shown in FIGS. 13 and 12, the second cover plate 48 is joined to the first installation flange 45 described above. As a result, the access opening 33 is completely blocked. In addition, the necessary branch piping is connected after the butterfly valve, and as is known, the fluid is prevented from flowing into the existing pipe 1 described later.

Next, before the description of the pipe plug insertion process, the device used in this process will be described. This device, in addition to the milling device M in Fig. 14, uses the first and second gates G1, G2, etc. of Fig. 20 that have been removed after the aforementioned piercing process.

The milling device M in FIG. 14 includes a sealed casing 5 and a cutter 8. The airtight casing 5 and the cutter 8 are formed with cutting grooves 10 shown by dotted lines in the existing pipe 1. First, the airtight case 5 will be explained.

In the airtight shell 5, the first and second split shells 51 and 52, which are divided into two up and down, are welded to each other in the field. The closed shell 5 surrounds a part of the existing pipe 1. In addition, the first and second divided shells 51 and 52 may be made of cast iron, and may be connected to each other by assembling bolts.

And as well known, the sealing shell 5 and the existing tube 1 are sealed by a rubber gasket.

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

That is, the second cylindrical portion 54 in FIG. 20 extends toward the upper side of the cutting groove 10 and, as in FIG. 20, defines the second entry and exit passage 53 of the first gate G1.

The second cylindrical portion 54 in FIG. 20 is provided with a second mounting flange 55 for mounting the sheath 2 containing the second gate G2. The second housing portion 56 of the second small valve body V2 is provided in the portion inside the second mounting flange 55 of the second cylindrical portion 54 in FIG. 16. It is provided with: by opening and closing the second small valve body V2 in the second housing portion 56 from the outside of the second cylinder portion 54 to prevent the outflow of fluid, the attachment and detachment of the sheath 2 can be carried out continuously under water The second operation part (not shown). The structure and shape of the second operation unit are the same as those of the first operation unit, and the description thereof is omitted.

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

Assembly process: First, as shown in Fig. 14, the casing 5 surrounds a part of the existing tube 1 in an airtight state. That is, the first divided shell 51 and the second divided shell 52 are welded to each other, and the existing pipe 1 is sandwiched and surrounded up and down. The cutter 8 is attached to the first divided housing 51 through the square flange 54f. In addition, 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-dot chain line in Figure 15, the end mill E of the cutter 8 is moved toward the center O of the existing pipe 1 so that the end mill E of the cutter 8 changes the existing pipe 1 cuts a part of the pipe wall, while rotating the end mill E of the cutter 8, the milling device M in Figure 15 is rotated in the circumferential direction R of the existing pipe 1 as a whole, and as shown in Figure 15 A part of the tube 1 is perforated to form a cutting groove 10 spanning half a circumference.

In this case, the shape and size of the cutting groove 10 to be cut are the same as the aforementioned half-peripheral groove 20 in FIG. 2.

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

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

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

Exchange process: After that, the end mill E of Fig. 15 is retracted, as shown in Fig. 17, the sheath 2 containing the second gate G2 is installed on the second mounting flange 55 of the second cylindrical portion 54, and further, by After the second gate G2 in Fig. 18 closes the second entry and exit passage 53, the cutter 8 and the end mill E in Fig. 14 are removed from the square flange 54f. After this removal, the upper tank 7 containing the first gate G1 shown in Fig. 17 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 passage 53 and the second entry-exit passage 53 is opened. Thereafter, as shown in FIG. 19, the first gate G1 descends downward through the second entry and exit passage 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 valve closed state described above, the upper portion 15 of the valve body 11 in FIG. 18 is in contact with the end surface 22f of the groove portion 22 of the half-circumferential groove 20. In addition, 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. In addition, the lower portion 16 of the valve body 11 is in contact with the inner peripheral surface of the existing pipe 1.

In this case, it can be performed by the same first gate G1: the water stop of the existing pipe 1 in Fig. 19 and the water stop of the T-tube 4 in Fig. 8. That is, both the perforation process for continuous flow branching in Fig. 8 and the pipe plug insertion process in Fig. 19 can be performed using one first gate G1.

In addition, when the first gate G1 is left in the existing pipe 1, for example, when the first gate G1 is provided as a product, another first gate different from the aforementioned first gate G1 is manufactured in advance. The gate can also be used as a pipe plug.

After the pipe plug insertion process, if the first gate G1 is not required, the existing pipe 1 is cut and other necessary pipework is performed. As shown in Figs. 19 and 20, the first gate G1 is The second gate G2 opens and closes the second entry-exit passage 53, and the first gate G1 is pulled up from the cutting groove 10 of the existing pipe 1 toward the upper tank 7 to remove the first gate G1. The method of dismantling after pulling up is the same as that after the aforementioned perforation process, and its description is omitted.

In this case, as shown in Figure 21, the perforation work and the pipe plug insertion work are completed. In addition, the third cover plate 57 may be attached to the square flange 54f, and the fourth cover plate 58 may be attached to the second attachment flange 55.

As above, the best embodiment has been described with reference to the drawings. However, anyone in the industry can easily imagine that various changes and corrections can be made without departing from the scope of the patent application based on this specification. For example, the first gate may be an outer bolt type gate. The fluid can be oil or gas. In addition, the first gate inserted as a pipe plug may be left as a valve. In addition, the butterfly valve is not provided, and the branch piping can be completed before the pipe plug is inserted. Therefore, the above changes and corrections can be regarded as being within the scope of the present invention as defined in the scope of the patent application. [Industrial availability]

The continuous flow method and device of the present invention can be used in pipelines where the partition valve body is inserted into existing pipes such as water channels and gas, and the fluid flow can be blocked by the partition valve body inserted thereby. In addition, the continuous flow method of the present invention can be used when branch piping is installed after continuous water perforation.

1‧‧‧Existing tube 10‧‧‧Cutting groove 11‧‧‧Valve body 11c‧‧‧Circular shape part 12‧‧‧Valve body side 13‧‧‧Guide 14‧‧‧Rubber gasket 15‧‧‧Upper 15e‧‧‧Fate 16‧‧‧Lower 16e‧‧‧Fate 17‧‧‧Middle 18‧‧‧Semi-cylindrical part 2‧‧‧Sheath 20‧‧‧Half Zhou Ditch 21‧‧‧Semicircle shape part 21f‧‧‧end face 22‧‧‧Gobe 22f‧‧‧end face 31‧‧‧Operation Department 32‧‧‧The second operation part 33‧‧‧In and Out Opening 4‧‧‧T-shaped tube 41‧‧‧Main body 42‧‧‧Branch Management Department 42f‧‧‧Circular flange 43‧‧‧The 1st access road 44‧‧‧The first tube 44f‧‧‧Square flange 45‧‧‧The first installation flange 46‧‧‧Containment Department 1 47‧‧‧The first cover 48‧‧‧Second cover 5‧‧‧Shell 51‧‧‧The first split shell 52‧‧‧Second split shell 53‧‧‧2nd access road 54‧‧‧The second tube 54f‧‧‧Square flange 55‧‧‧Second installation flange 56‧‧‧Containment Department 2 57‧‧‧The third cover 58‧‧‧4th cover 6‧‧‧Piping 7‧‧‧Upper tank 8‧‧‧Cutter E‧‧‧End Mill F0‧‧‧top F1‧‧‧1st side F3‧‧‧Second side G1‧‧‧Gate 1 G2‧‧‧Gate 2 V‧‧‧Small valve body V2‧‧‧Second small valve body H‧‧‧Hole saw H0‧‧‧Branch hole M‧‧‧Milling device O‧‧‧ Center R‧‧‧Circumference direction

[Figure 1] A schematic perspective view showing the piping structure of an embodiment of the construction method of the present invention. [Figure 2] A schematic perspective view of the device used in the piercing process. [Figure 3] A schematic perspective view of a partial cross-section of the device used in the piercing process. [Figure 4] (a) and (b) are cross-sectional views of the same device when the first gate is open. [Figure 5] Figures 5 (a) and (b) are cross-sectional views of the same device when the first gate is closed. [Figure 6] (a) is a schematic perspective view of a partial cross-section of the T-tube showing 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 respectively an exploded perspective view of the first gate and a perspective view of a rubber gasket. [Figure 8] A schematic perspective view showing a partial cross-section of a state where the upper tank and the second gate are attached to the T-tube. [Figure 9] A schematic perspective view showing a partial cross-section of a state where the butterfly valve is further attached to the T-tube. [Figure 10] A schematic perspective view showing a partial cross-section of the state where the upper tank and the first gate are removed from the T-tube. [Figure 11] (a) is a schematic perspective view of a T-shaped tube showing a partial cross-section in a state where the small valve body is closed, and (b) is a schematic perspective view of the small valve body and the like. [Figure 12] A schematic perspective view showing a partial cross-section of the T-shaped tube with the second gate removed from the T-shaped tube. [Figure 13] A schematic perspective view of the T-shaped tube with the second gate removed from the T-shaped tube. [Figure 14] A schematic perspective view showing a milling device for forming cutting grooves. [Figure 15] A cross-sectional view showing the milling device during cutting. [Figure 16] A schematic perspective view of a partial cross-section of the piping structure forming the cutting groove. [Figure 17] A schematic perspective view showing a state where the first and second gates are attached to the case instead of the cutter. [Figure 18] Figures 18 (a) and (b) are separate, showing the same cross-sectional view and a cross-sectional view of the joint part of the shell. [Figure 19] A schematic perspective view showing the state where the first gate enters the existing pipe. [Figure 20] A schematic perspective view showing the state after the first gate is extracted from the existing pipe. [Figure 21] A schematic perspective view showing the pipeline in a completed state.

1‧‧‧Existing tube

2‧‧‧Sheath

4‧‧‧T-shaped tube

5‧‧‧Shell

6‧‧‧Piping

7‧‧‧Upper tank

10‧‧‧Cutting groove

20‧‧‧Half Zhou Ditch

31‧‧‧Operation Department

41‧‧‧Main body

42‧‧‧Branch Management Department

44‧‧‧The first tube

45‧‧‧The first installation flange

47‧‧‧The first cover

48‧‧‧Second cover

G1‧‧‧Gate 1

G2‧‧‧Gate 2

V2‧‧‧Second small valve body

H‧‧‧Hole saw

R‧‧‧Circumference direction

Claims (8)

A continuous flow method comprising: in order to install branch piping, the above-mentioned body part (41) of the T-shaped tube (4) having the body part (41) and the branch pipe part (42) is installed on the existing pipe (1), Open the first gate (G1) that opens and closes the branch pipe part (42). The hole saw (H) is used to perforate the existing pipe (1); and the shell (5) is installed on the existing pipe ( 1) Rotate the end mill (E) arranged in the housing (5) together with the housing (5) to form a cutting groove (10) that is cut across half of the circumference, and remove the tube from the cutting groove (10) The process of inserting the plug into the pipe plug in the aforementioned existing pipe (1); and prior to the aforementioned perforation process, preparing the branch pipe portion (42) to have a half-circumferential groove (20) cut across a half-circle in the circumferential direction (R) The process of the foregoing T-tube (4); and after the foregoing perforation process, the first gate (G1) is inserted into the first gate insertion process of the foregoing half-circumferential groove (20); and after the foregoing first gate insertion process, The connection process of connecting the piping material (6) to the branch pipe part (42) of the T-shaped tube (4); and after the connection process, the first gate (G1) inserted into the semicircular groove (20) is removed from The process of removing the branch pipe portion (42); in the process of inserting the pipe plug, the first gate (G1) or another first gate having the same shape and structure as the first gate (G1) is used as the foregoing The pipe plug is inserted into the aforementioned existing pipe (1) from the aforementioned cutting groove (10). For example, the continuous flow method of the first item in the scope of the patent application, wherein, during the insertion of the pipe plug, the first gate (G1) is used as the pipe plug to be inserted into the existing pipe (1) from the cutting groove (10) . For example, the continuous flow method of item 2 of the scope of patent application, in which, after the aforementioned perforation process, the butterfly valve as the aforementioned piping material (6) is connected to the aforementioned branch pipe part (42), and the aforementioned connection process is carried out. With the valve closed, the process of removing the first gate (G1) from the branch pipe part (42) is carried out. For example, the continuous flow method of item 3 of the scope of patent application, which implements: the process of connecting the branch pipe to the butterfly valve; and after the connection of the branch pipe, the first gate (G1) prevents the fluid from flowing in the aforementioned existing The process of flow in the tube (1). For example, the continuous flow method of the second item in the scope of patent application, wherein the branch pipe portion (42) has a first access path ( The first cylindrical portion (44) of 43) further includes a second gate (G2) that is parallel to the radial direction of the branch pipe portion (42) and moves forward and backward in the horizontal direction to open and close the first entry and exit passage (43) ), the process of installing in the branch pipe part (42), the first gate (G1) is opened from the branch pipe part (42) by the second gate (G2) to open the first access passage (43) The process of removal. For example, the continuous flow method of item 5 of the scope of patent application, wherein the shell (5) has a second access path (53) that extends directly above the cutting groove (10) and defines the first gate (G1) The second cylindrical portion (54) further includes: a process of removing the second gate (G2) from the first cylindrical portion (44); and moving forward and backward in a horizontal direction parallel to the radial direction of the housing (5) The process of opening and closing the second gate (G2) of the second entry and exit passage (53) in the second tube portion (54); and the second entry and exit passage (53) by the second gate (G2) The process of opening and removing the first gate (G1) inserted into the existing tube (1) from the existing tube (1). A kind of continuous flow device is a continuous flow device for perforation with a first gate (G1) in the branch pipe part (42) of the T-shaped tube (4). ) Is formed with a half-peripheral groove (20) cut across a half-periphery in the circumferential direction (R). The half-peripheral groove (20) is provided with a pair of semicircular portions (21) that are convex downward at both ends, and The circumferential direction (R) extends a groove portion (22) of a certain width connecting the semicircular shape portions (21) to each other, and the first gate (G1) is provided with: containing the branch pipe inserted from the semicircular groove (20) The valve body (11) of the round shape part in the part (42), and the forward A pair of valve body side portions (12) protruding from the side of the valve body (11), a pair of guides (13) extending downward from the valve body side portion (12), and rubber for sealing The gasket (14), the rubber gasket (14), is provided with a belt-shaped strip that is mounted on the upper half of the circular portion and contacts a pair of parallel first end surfaces that define the groove (22) A pair of upper parts (15); and a band-shaped lower part (16) that is installed on the lower half of the aforementioned circular portion and is in contact with the inner peripheral surface of the aforementioned branch pipe part (42); and are respectively installed A pair of middle parts (17) 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 middle part (17) from below, Each of the aforementioned intermediate portions (17) has a semi-cylindrical portion (18) fitted with the aforementioned semicircular shape portion (21), and each of the aforementioned intermediate portions (17) has: joined under the valve body side portion (12) The upper surface (F0) of the valve body (F0), the first side surface (F1) joined to the side surface of the valve body (11), and the second side surface (F2) joined to the guide member (13). A kind of continuous flow device is a continuous flow device for perforation. It has a T-shaped tube (4) containing a body part (41) and a branch pipe part (42), and a first gate (G1). (42) is formed with a half circle spanning the circumferential direction (R) In the cut half-circumferential groove 20, the first gate (G1) enters the branch pipe portion (42) from the half-peripheral groove (20) to prevent fluid flow in the branch pipe portion (42), and faces the half-circumferential groove (20). ) Extends directly above and defines the first access passage (43) of the first gate (G1). The first cylindrical portion (44) is connected to the branch pipe portion (42) and is provided with: and the branch pipe portion The second gate (G2) that opens and closes the first access path (43) is provided when the second gate (G2) opens the first access path (43). The sheath (2) accommodating the second gate (G2) is provided with a first mounting flange (45) in the first tube portion (44), which is used to install the second gate (G2) The sheath (2) of the first tube portion (44) is provided with a first receiving portion (46) of a small valve body V on the inner part of the first mounting flange (45) in the first tube portion (44), and is provided with An operation portion (31) capable of attaching and detaching the sheath (2) by opening and closing the small valve body (V) in the first housing portion (46) from the outside of the first cylindrical portion (44).

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