JP2004308774A - Uninterrupted-water branch joint and branching method of copper pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an uninterrupted-water branch joint mainly used for copper pipes, and performing the branching work without stopping the water flow in the pipes. <P>SOLUTION: In this constant water branch joint 21 being mounted on a specific position to branch the pipe, the uninterrupted-water branch joint 21 comprises at least semi-cylindrical first split member 22 and second split member 26 surrounding an outer peripheral face of the pipe, a branch cylindrical member 23 connected to the first split member 22, a boring machine 35 detachably mounted on the branch cylindrical member 23 for forming a branch hole 38 on the pipe, and a gate valve mechanism 24 for blocking or opening the inside of the branch cylindrical member 23. The boring machine 35 comprises an operating part 36, a rotating shaft 37 rotated by the operation of the operating part 36, and a boring blade 39 mounted on a tip of the rotating shaft 37. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is mainly used for copper piping, and relates to a continuous water branching joint capable of branching without stopping water flow in the piping, and a method of branching a copper pipe.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as an uninterrupted water branching joint capable of performing a branching operation without stopping water flow in a pipe, the following structure is known. This unsealed water branch joint is mainly used for steel pipes. As shown in FIG. 9, a joint body 2 having a substantially semi-cylindrical holding portion 1 provided at a lower portion, and a substantially semi-cylindrical upper portion. And a branch pipe connection port 4 is provided at an upper portion of the joint body 2.
[0003]
The inside of the joint body 2 is provided with a piston 7 having a cutting blade 5 at the tip and having a through hole 6 in the middle so as to be slidable in the passage 16, and a cap at the rear end side of the piston 7. 8 is screwed. A pressing pin 11 is provided inside the cap 8 via an explosive 9 and a primer 10, and a driving pin 12 is provided on the pressing pin 11 so as to protrude outward (see Patent Document 1). .
[0004]
The procedure of the branching operation using the branch joint having such a configuration will be described. First, the joint main body 2 and the holding piece 3 are set at predetermined positions of the existing pipe 13 to be branched, and are fixed by bolts (not shown). Next, when the driving pin 12 is hit with a hammer or the like, the driving pin 12 pushes the pressing pin 11 to ignite the primer 10 and explode the explosive 9. When the explosive 9 explodes, the explosive force forcibly moves the piston 7 from one end to the other end in the passage 16, and the cutting blade 5 provided at the tip cuts a part of the existing pipe 13 to form a hole in the pipe wall. 14 is opened (see FIG. 10). At this time, the hole 14 communicates with the branch pipe connection port 4 through the through hole 6, and the cut piece 15 on the pipe wall is held at the tip end side of the cutting blade 5.
[0005]
[Patent Document 1]
JP-A-9-159089 (FIGS. 1 to 3).
[0006]
[Problems to be solved by the invention]
This conventional branch joint is used mainly for branching a steel pipe, and has a drawback that it cannot be used for a copper pipe. That is, since the copper pipe is higher in softness than the steel pipe, there is a possibility that the pipe joint may be distorted or crushed by the impact of the hammer or the explosion of the explosive, and the conventional branch joint cannot be used for the copper pipe.
[0007]
In addition, since the copper pipe expands and contracts under the influence of the temperature of the hot water flowing therethrough, there is also a problem that it is difficult to ensure watertightness between the copper pipe and the branch joint.
[0008]
Therefore, the conventional branch joint has a problem to be solved so that it can be used not only for steel pipes but also for copper pipes.
[0009]
[Means for Solving the Problems]
As a specific means for solving the problems of the conventional example, the present invention is a continuous water branch joint that is attached to a predetermined position of a pipe to branch and performs a branching operation, wherein the continuous water branch joint is an outer peripheral surface of the pipe. A semi-cylindrical first divided body and a second divided body surrounding the first divided body, a branch cylinder connected to the first divided body, and a branch hole formed in the branch cylinder so as to be detachable, and a branch hole formed in the pipe. And a gate valve mechanism for shutting off or opening the inside of the branch cylinder, the drilling machine includes an operating unit, a rotating shaft that is rotated by operating the operating unit, and the rotating shaft. And a perforated blade provided at the tip of the watertight branch joint.
[0010]
The perforation blade is configured to be a blade for a copper pipe, and further, packing is disposed inside the first divided body and the second divided body. is there.
[0011]
In addition, the present invention is characterized in that the waterless branch joint according to claims 1 to 3 is attached to a copper pipe, and a branch hole is drilled in the copper pipe with a copper pipe drilling blade provided on a rotating shaft of a drilling machine. After raising the rotating shaft together with the cut piece of the copper pipe, shut off the inside of the branch cylinder by the gate valve mechanism, remove the drilling machine from the branch cylinder, connect the branch pipe to the branch cylinder, An object of the present invention is to provide a method of branching a copper pipe, wherein the inside of the branch cylinder is opened by the gate valve mechanism.
[0012]
The gate valve mechanism has a role as a temporary valve during the branching operation, and has a role as a permanent valve after branching.
[0013]
In the continuous water branch joint according to the present invention and the method of branching a copper pipe, there is no step of generating an impact such as a hit with a hammer or an explosive explosive as in the conventional example at the time of work, so the copper pipe is softer than a steel pipe. No distortion or crushing when used for
Therefore, even in the case of copper pipes, branching work can be performed without interrupting the fluid as in the case of steel pipes, and the working time can be greatly reduced.
Further, since the packing is provided inside the first divided body and the second divided body, even if the copper pipe expands and contracts due to the temperature of the hot water flowing therethrough, the water tightness with the branch joint is improved. Can be secured.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. First, in FIG. 1, reference numeral 21 denotes an uncut water branch joint attached to an existing pipe 25, and the uncut water branch joint 21 includes a first divided body 22 and a second divided body surrounding an outer peripheral surface of the existing pipe 25. A body 26, a branch cylinder 23 connected to the first divided body 22, a punch 35 removably provided in the branch cylinder 23, and a gate valve mechanism 24 for shutting off or opening the inside of the branch cylinder 23. Consists of
[0015]
As shown in FIG. 1, the first divided body 22 has a length of, for example, about 200 mm along the longitudinal direction of the existing pipe 25. As shown in FIG. 2, the first divided body 22 is formed in a semi-cylindrical shape along the outer peripheral surface of the existing pipe 25, and flanges 27 are formed at edges on both sides thereof. At a predetermined position of the flange 27, a bolt hole (not shown) for fixing the flange 41 of the second divided body 26 described later with a bolt 28a and a nut 28b is provided.
A packing 42 is provided inside the first split body 22 to ensure watertightness with the existing pipe 25.
[0016]
The second divided body 26 has a length of, for example, about 200 mm along the longitudinal direction of the existing pipe 25, similarly to the first divided body 22. As shown in FIG. 2, the second divided body 26 is formed in a semi-cylindrical shape along the outer peripheral surface of the existing pipe 25, and flanges 41 are formed at edges on both sides thereof. A screw hole (not shown) for fixing with a bolt 28a and a nut 28b is provided at a predetermined position of the flange 41, similarly to the flange 27 of the first divided body 22.
A packing 43 is provided inside the second divided body 26 to ensure watertightness with the existing pipe 25.
[0017]
The first divided body 22 and the second divided body 26 formed as described above surround a predetermined outer peripheral surface of the existing pipe 25 to be branched, and the flanges 27 and 41 are brought into contact with each other, as described above. It is fixed with a bolt 28a and a nut 28b. At this time, since the packings 42 and 43 are disposed inside the first divided body 22 and the second divided body 26, respectively, as described above, the copper pipe is affected by the temperature of the hot water flowing therethrough and the like. Even if it expands and contracts, water tightness between the first divided body 22 and the second divided body 26 can be secured.
Further, as described above, since the first divided body 22 and the second divided body 26 have a length of about 200 mm, they surround the outer peripheral surface of the existing pipe 25 in a relatively wide range, so that during the operation, The applied force is widely dispersed, which is effective as a measure against crushing of the copper tube.
[0018]
The branch cylindrical body 23 is connected to a substantially central position of the first divided body 22, and the opening on the base portion 23 a side is connected as an opening of the tube wall of the first divided body 22. Further, a lid member 29 is attached to the other end 23 b of the branch cylinder 23 with a bolt 30 and a nut 31.
[0019]
The drilling machine 35 includes an operating unit 36, a rotating shaft 37 that rotates by operating the operating unit 36, and a drilling blade 39 provided at a tip of the rotating shaft 37. That is, the drilling machine 35 has an operation part 36 outside the branch cylinder 23, and the rotating shaft 37 connected to the operation part 36 penetrates the lid member 29 to the base 23 a side in the branch cylinder 23. Is extended. The outer peripheral surface of the rotating shaft 37 is formed, for example, with a thread, so that the rotating shaft 37 can be advanced or retracted by rotating the operation unit 36.
A predetermined sealing material 40 is provided at a position where the rotation shaft 37 of the lid member 29 penetrates, to maintain airtightness. Further, by removing the bolt 30 and the nut 31 of the lid member 29, the drilling machine 35 can be removed together with the lid member 29.
A drilling blade 39 for drilling a branch hole 38 in the existing pipe 25 is provided at the tip of the rotating shaft 37. A puncture needle 39a is provided inside the piercing blade 39 so that the cut piece 45 of the existing pipe 25 can be held. The perforation blade 39 is desirably a blade for a copper tube corresponding to the hardness of the copper tube or the like.
[0020]
The gate valve mechanism 24 is provided in the middle of the branch cylindrical body 23, and the operating handle 32 of the gate valve mechanism 24 is rotated to move the shaft 33 forward and backward, and is provided at the tip of the shaft 33. The structure is such that the gate member 34 can be advanced and retracted.
That is, when the operating portion 32 is operated to advance the shaft portion 33, the gate member 34 located in the storage portion 44 projects and shuts off the inside of the branch cylindrical body 23 (see FIGS. 5 to 7). Conversely, when the shaft portion 33 is retracted, the gate member 34 is housed in the housing portion 44 to open the inside of the branch cylindrical body 23 (see FIG. 8).
[0021]
Next, a procedure of a branching operation using the non-water-distributable branch joint 21 configured as described above will be described. First, as shown in FIG. 1, the non-water-distributable branch joint 21 is attached by surrounding the outer peripheral surface of a predetermined position of the existing pipe 25 at a predetermined position to be branched by the first and second divided bodies 22 and 26. In this case, the flanges 27 and 41 of the first divided body 22 and the second divided body 26 are brought into contact with each other and fixed with the bolt 28a and the nut 28b.
[0022]
Then, the operation unit 36 of the drilling machine 35 is rotated to advance the rotary shaft 37, and the rotation of the drilling blade 39 opens a branch hole 38 at a predetermined position of the existing pipe 25 (see FIG. 3). At this time, the cut piece 45 of the existing pipe 25 is held inside the perforation blade 39.
[0023]
After piercing the existing pipe 25 with the piercing blade 39, the operating unit 36 of the piercing machine 35 is rotated to retract the piercing blade 39 and to pull it up above the gate member 34. At this time, the fluid 46 flowing through the existing pipe 25 flows into the inside of the branch cylinder 23 (see FIG. 4).
[0024]
Next, the operation handle 32 of the gate valve mechanism 24 is rotated to move the shaft portion 33 forward and the gate member 34 to project to shut off the inside of the branch cylinder 23 (see FIG. 5). Therefore, the inflowing fluid 46 is blocked by the gate member 34 of the branch cylinder 23.
[0025]
Then, the bolt 30 and the nut 31 of the lid member 29 are removed, and the drilling machine 35 is removed together with the lid member 29. At this time, the cut pieces 45 held inside the perforation blade 39 are also collected. Further, since the fluid 46 is blocked by the gate member 34 of the branch cylinder 23, it does not leak out (see FIG. 6).
[0026]
The branch pipe 47 is connected to the other end 23b of the branch cylinder 23 with the bolt 30 and the nut 31 (see FIG. 7).
[0027]
The operation handle 32 of the gate valve mechanism 24 is rotated to move the shaft portion 33 backward and the gate member 34 backward, thereby opening the inside of the branch cylinder 23 (see FIG. 8).
As described above, the gate valve mechanism 24 functions as a temporary valve during the branching operation (see FIG. 5), and functions as a permanent valve after branching (see FIG. 8).
[0028]
As described above, since there is no step of causing an impact such as hitting with a hammer or explosion of explosives as in the conventional example during the branching operation, the waterless branch joint 21 is used for a copper pipe having higher softness than a steel pipe. No distortion or crushing. Accordingly, the copper pipe branching operation can be performed without interrupting the fluid.
[0029]
【The invention's effect】
As described above, the continuous water branch joint according to the present invention is a continuous water branch joint that is attached to a predetermined position of a pipe to be branched and performs a branching operation, and the continuous water branch joint includes an outer peripheral surface of the pipe. Surrounding semi-cylindrical first divided body and second divided body, a branch cylinder connected to the first divided body, and a branch hole provided in the branch cylinder so as to be detachable and a hole formed in the pipe. A drilling machine, and at least a gate valve mechanism for shutting off or opening the inside of the branch cylinder, the drilling machine has an operating unit, a rotating shaft that rotates by operating the operating unit, By having a perforated blade provided at the tip, there is no step in which impact such as hitting with a hammer or explosion of explosives occurs as in the conventional example at the time of work, so even if it is used for a copper pipe that is softer than steel pipe, distortion and There is no collapse. Therefore, even in the case of a copper pipe, the branching operation can be performed without interrupting the fluid as in the case of the steel pipe, and there is an excellent effect that the working time can be greatly reduced.
[0030]
And, since the packing is provided inside the first divided body and the second divided body, even if the copper pipe expands and contracts due to the temperature of the hot water flowing therethrough, the water tightness with the branch joint is maintained. The excellent effect of being able to secure is achieved.
[0031]
Further, in the method for branching a copper pipe according to the present invention, the non-water-resistant branch joint according to any one of claims 1 to 3 is attached to the copper pipe, and the copper pipe is drilled with a copper pipe drilling blade provided on a rotating shaft of a drilling machine. A branch hole is drilled, the rotary shaft is pulled up together with the cut piece of the copper pipe, then the inside of the branch cylinder is shut off by a gate valve mechanism, the drilling machine is removed from the branch cylinder, and the branch cylinder is removed. By connecting the branch pipe to the branch pipe and opening the inside of the branch cylinder by the gate valve mechanism, the branching work can be performed without interrupting the fluid, so that there is an excellent effect that the working time can be greatly reduced. .
[0032]
The gate valve mechanism has a role as a temporary valve during the branching operation, and has a role as a permanent valve after the branching, so that it is not necessary to provide both separately, so that the workability is good. It has excellent effects.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view of a state in which an uncut water branch joint 21 according to the present invention is attached to an existing pipe 25.
FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is an explanatory view showing a state in which a branch hole 38 is opened in an existing pipe 25 by a piercing blade 39 of a piercing machine 35.
FIG. 4 is an explanatory view of a state in which a drilling blade 39 of the drilling machine 35 is pulled up.
FIG. 5 is an explanatory view of a state in which the inside of the branch cylinder 23 is blocked by a gate member 34;
FIG. 6 is an explanatory view of a state in which a lid member 29 and a punch 35 are removed from the branch cylinder 23;
FIG. 7 is an explanatory view showing a state where a branch pipe 47 is connected to the other end 23b of the branch cylindrical body 23;
FIG. 8 is an explanatory view of a state in which the gate member 24 is retracted to open the branch cylinder 23.
FIG. 9 is a longitudinal sectional view of a state in which a branch joint according to a conventional example is attached to an existing pipe 13.
FIG. 10 is a perspective view showing a longitudinal section obtained by branching an existing pipe 13 using a branch joint according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Nipping part 2 Joint main body 3 Nipping piece 4 Branch pipe connection port 5 Cutting blade 6 Through hole 7 Piston 8 Cap 9 Explosive 10 Detonator 11 Pressing pin 12 Driving pin 13 Existing pipe 14 Hole 15 Cutting piece 16 Passage 21 Waterproof branch joint 22 First divided body 23 Branch cylindrical body 23a Base 23b Other end 24 Gate valve mechanism 25 Existing pipe (copper pipe)
26 Second divided body 27 Flange 28a Bolt 28b nut 29 Lid member 30 Bolt 31 Nut 32 Operating handle 33 Shaft 34 Gate member 35 Punch 36 Operating part 37 Rotating shaft 38 Branch hole 39 Punching blade 39a Puncture needle 40 Sealing material 41 Flange 42 Packing 43 Packing 44 Storage part 45 Cutting piece 46 Fluid 47 Branch pipe

Claims (5)

A watertight branch joint that is attached to a predetermined position of a pipe to branch and performs branching work,
The watertight branch joint includes a semi-cylindrical first and second divided bodies surrounding an outer peripheral surface of the pipe, a branched cylinder connected to the first divided body, and a detachable cylinder. And a drilling machine for drilling a branch hole in the pipe, and at least a gate valve mechanism for blocking or opening the inside of the branch cylinder,
The waterless branch joint according to claim 1, wherein the drilling machine includes an operating unit, a rotating shaft that is rotated by operating the operating unit, and a drilling blade provided at a tip of the rotating shaft. The waterless branch joint according to claim 1, wherein the perforation blade is a blade for a copper pipe. The watertight branch joint according to claim 1, wherein a packing is disposed inside the first divided body and the second divided body. Attach the continuous water branch joint according to claim 1 to a copper pipe,
Drilling a branch hole in the copper tube with a drilling blade for a copper tube provided on the rotating shaft of the drilling machine,
After raising the rotating shaft together with the cut piece of the copper tube, the inside of the branch cylinder is shut off by the gate valve mechanism,
Removing the drilling machine from the branch cylinder,
Connecting a branch pipe to the branch cylinder,
A method of branching a copper pipe, wherein the inside of the branch cylinder is opened by the gate valve mechanism. The method according to claim 4, wherein the gate valve mechanism has a role as a temporary valve during the branching operation, and has a role as a permanent valve after branching.

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