JPH06117555A - Three-way valve device using fitting - Google Patents

Abstract

PURPOSE:To furnish a three-way valve device to be furnished to main pipes without using bypass piping by a hot tap work method. CONSTITUTION:A fitting 10 is furnished by surrounding a part where a branching-off pipe 2 is connected to main pipes 1, and an opening portion 6 to penetrate a connection portion is provided, and a plug 20 is furnished to the fitting 10, and an outer pipe shaft 26 is closely put into the plug 20 so as to be able to be turned and moved up and down, and a cylindrical stopper 43 provided with a slit 49 and a connection hole 50 is put on the lower end portion of the outer pipe shaft 26, and the opening portion 6 between the main pipes 1 and the branching-off pipe 2 is opened/closed by enlarging or reducing this stopper 43 by means of an extension shaft 58 put in the outer pipe shaft 26 turnably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-way valve device which is inserted into an existing pipe by a hot tap method.

[0002]

2. Description of the Related Art Conventionally, in order to insert the three-way valve 85 into the main pipe 1 while keeping the fluid in the pipe flowing by the hot tap method without reducing the pressure in the pipe, it is shown in FIGS. It was done as described.

That is, as shown in FIG. 27, fittings 10 are attached by welding to two positions on both sides of the main pipe 1 where the three-way valve 85 (FIG. 33) is attached. The fitting 10 is composed of an upper fitting 11 and a lower fitting 16. The upper fitting 11 is provided with a flange 12 and an internal thread 13, and a plug 20 is screwed into the internal thread 13 to be hermetically sealed ( 28).

The flange 12 of the fitting 10
29, a gate valve 66 is attached, a perforator 70 is attached on the gate valve 66, and the main pipe 1 is perforated with a cutter 71 having a diameter larger than the outer diameter of the main pipe 1 to provide an opening 6.

Next, the punch 70 is removed from the gate valve 66, and the breaker 80 is attached after that (see FIG. 3).
0). The breaker 80 is described in detail in Japanese Patent Laid-Open No. 3-292491.

As described above, the bypass pipe 81 is attached between the two breakers 80 attached to the gate valve 66, the stopper 43 is inserted into the opening 6 punched by the punch 70, and the slit 49 of the stopper 43 is inserted. Are arranged so as to face the flow direction of the fluid (FIGS. 30 and 31), and the stopper 43 is expanded, the fluid flows through the bypass pipe 8
Flow through 1 and the flow between fittings 10 and 10 stops.

The structure of the stopper 43 is Japanese Patent Publication No. 48.
-27244. Next, the fluid in the portion where the flow between the fittings 10 and 10 is stopped is discharged, the main pipe 1 is cut, the three-way valve 85 is inserted, and the branch pipe 2 is attached (FIG. 32).

Next, the stopper 43 of the breaker 80 is contracted and pulled up, and the breaker 80 is removed from the gate valve 66. Then, the plug clamp 75 (FIGS. 7 and 8) is attached to the gate valve 66, and the plug 20 is fitted to the fitting 1.
Attach the fitting 10 to the female screw 13 of No. 0, seal the fitting 10, and remove the plug tightener 75 (FIG. 33).

The above operation is performed by opening and closing the gate valve 66 to prevent the internal fluid from leaking to the outside.

[0010]

To provide the three-way valve 85 in the main pipe 1 by the hot tap method, as described above, the fittings 10 are attached to both sides of the portion of the main pipe 1 where the three-way valve 85 is provided, Bypass piping 81 had to be provided.

Therefore, when the main pipe 1 is a buried pipe,
The part to be excavated has grown. In addition, the bypass pipe 81
Since the fluid flows through the slits 49 of the stopper 43, the slits 49 of the stopper 43 restrict the flow rate and thus the construction.

[0012] The present invention has been made in view of the above matters, and a technical object thereof is to form a three-way valve device mounted on a main pipe by a hot tap method so that it can be mounted without providing a bypass pipe. .

[0013]

According to a first aspect of the present invention, a branch pipe 2 is connected to a side surface of a main pipe 1, and a fitting 10 is attached to a hermetically sealed structure so as to surround a connecting portion between the main pipe 1 and the branch pipe 2. An opening 6 opened by a cutter having a diameter larger than the outer diameter of the main pipe 1 is provided in the connecting portion, a plug 20 is attached to the flange 12 of the fitting 10, and an outer cylinder shaft 26 is attached to the plug 20. An upper cam piece 33 that is rotatably tightly fitted and provided with a female screw 34 at the lower end of the outer cylinder shaft 26 is provided, and the female screw 34 that is formed separately from the outer cylinder shaft 26 is provided below the upper cam piece 33.
A lower cam piece 38 having a female screw 39 in the opposite direction to
A cylindrical stopper 43 fitted in the opening 6 is provided,
Inclined grooves 44 are provided in the upper and lower parts of the inside of the stopper 43 so as to face each other, and the upper cam piece 33 and the lower cam piece 38 are fitted in the inclined groove 44 so as not to rotate and vertically slidable, The stopper 43 is provided with a vertical slit 49 and a communication hole 50 whose circumferential position is different from that of the slit 49, and the expansion shaft 58 is rotatably and tightly fitted to the outer cylinder shaft 26.
Connect the male screw 59 and the male screw 62 of the expansion shaft 58 to the upper cam piece 3
The three-way valve device using fittings is formed by being screwed into the female screw 34 of No. 3 and the female screw 39 of the lower cam piece 38 so that the stopper 43 can be expanded by the rotation of the expansion shaft.

A second aspect of the invention is a three-way valve device in which the outer cylinder shaft 26 of the first aspect of the invention is tightly fitted to the plug 20 so as to be vertically slidable and fitting is used. The third invention and the fourth invention are the stoppers 43 in the first invention and the second invention.
The communication holes 50 provided at different positions in the circumferential direction from the slits 49 are provided at two positions respectively to form a three-way valve device using fitting.

The fifth invention to the seventh invention are the communication holes 50 of the stopper 43 in the second invention to the fourth invention.
A closing part 54 that can close the opening 6 is provided below each of the above to form a three-way valve device using fittings.

[0016]

The present invention is a three-way valve device that can be installed on the main pipe 1 by the hot tap method. And 1st invention connects the branch pipe 2 to the side surface of the main pipe 1 by the hot tap method (FIG. 2), surrounds the connection part of the main pipe 1 and the branch pipe 2, and welds the fitting 10 into a closed structure. Put it on (Fig. 4).

Next, a gate valve 66 is attached to the fitting 10, a perforator 70 is attached to the gate valve 66, and an opening 6 is provided at a connecting portion with a cutter 71 (FIG. 6). The outer diameter of the cutter 71 at this time is larger than the outer diameter of the main pipe 1, and the opening 6 is completely opened.

Next, the punch 70 is removed from the gate valve 66, the plug clamp 75 is attached to the gate valve 66 (FIG. 7), and the plug 20 (FIG. 9) with the stopper 43 is attached to the fitting 10 (FIG. 8). ).

Next, the gate valve 66 and the plug clamp 75
When is removed, a three-way valve device using a fitting is installed in the main pipe 1. The above operation is performed by opening and closing the gate valve 66 so that the fluid inside does not leak out.

When the outer cylinder shaft 26 is rotated in the contracted state, the stopper 43 can be rotated together with the outer cylinder shaft 26 to change the positions of the slit 49 and the communication hole 50. When the expansion shaft 58 is rotated to one side with respect to the outer cylinder shaft 26, the stopper 43 is expanded, and the outer peripheral surface of the stopper 43 is pressed against the openings 6 of the main pipe 1 and the branch pipe 2 to expand the expansion shaft 58. When the is rotated in the opposite direction, the stopper 43 shrinks.

The communication hole 50 of the stopper 43 of the present invention is
The position in the circumferential direction is different from the slit 49 by 90 degrees (FIG. 10), and the slit 49 of the stopper 43 and the communication hole 50 are provided.
When one of the main pipes 1 is matched with the branch pipe 2 and the stopper 43 is expanded (FIG. 11), one of the main pipes 1 and the branch pipe 2 communicate with each other, and the other of the main pipes 1 is closed.

When the slit 49 of the stopper 43 and the communication hole 50 are aligned with the other side of the main pipe 1 and the branch pipe 2 and the stopper 43 is expanded (FIG. 12), the other side of the main pipe 1 communicates with the branch pipe 2. Then, one of the main pipes 1 is closed.

When either the slit 49 or the communication hole 50 of the stopper 43 is not aligned with the main pipe 1 and the branch pipe 2 and the stopper 43 is expanded (FIG. 13),
The main pipe 1 and the branch pipe 2 are closed.

In the second invention, further, by sliding the outer cylinder shaft 20 upward (FIG. 1), the stopper 43 is pulled up from the openings 6 of the main pipe 1 and the branch pipe 2, and the main pipe is 1.1 and the branch pipe 2 communicate with each other, and the opening 6
There is nothing that hinders the flow, and the flow is good.

In the third and fourth inventions, the communication holes 50 are provided in the stopper 43 at two positions (FIG. 20), so that the main pipe 1 and the main pipe 1 can be opened even when the stopper 43 is in the opening 6. 1 and the branch pipe 2 can be connected (FIG. 21).

Also, by closing the slit 49 of the stopper 43 and the communication hole 50 with one of the main pipes 1 or the other of the main pipes 1 and the branch pipe 2, only one or the other of the main pipes 1 is closed. (FIG. 22), and the branch pipe 2 can be closed only by matching the communication holes 50 with the main pipes 1 and 1 (FIG. 23).

The fifth to seventh inventions further include
The openings of the main pipe 1 and the branch pipe 2 are closed by the closing portion 54 provided below the communication hole 50 of the stopper 43 (FIG. 26).

[0028]

1 to 13 are views for explaining an embodiment of the present invention. The three-way valve device using the fitting of this embodiment is formed as described below and has the following configuration.

That is, the branch pipe 2 is welded and connected to the side surface of the portion of the main pipe 1 where the three-way branch is made (FIGS. 2 and 3).
Then, the fitting 10 is attached by welding around the connection portion between the main pipe 1 and the branch pipe 2 (FIG. 4).

The fitting 10 includes an upper fitting 11 and a lower fitting 1 as shown in FIG.
6 and the upper fitting 11 has a flange 12
And a female screw 13, and the main pipe contact portion 4 and the branch pipe contact portion 15
Is provided, and the lower fitting 16 is a main contact portion 1
4 and a branch pipe contact portion 15 are provided.

The upper fitting 11 and the lower fitting 16 are fitted together by surrounding the connecting portion of the main pipe 1 and the branch pipe 2, and are welded by fillet welding and butt welding.
The fitting 10 is attached to the closed structure.

Next, as shown in FIG. 6, a gate valve 66 is attached to the flange 12 of the fitting 10, a perforator 70 is attached to the gate valve 66, and a cylindrical shape having a diameter larger than the outer diameter of the main pipe 1 is attached. The cutter 71 punches the opening 6 in the connecting portion (FIGS. 4 and 6).

Next, the portion cut by the cutter 71 is
Pull the cutter 71 up while it is stored in the cutter 71,
The gate valve 66 is closed, and the punch 70 is removed from the gate valve 66. Then, the branch pipe 2 is connected to the main pipe 1, and the opening 6 penetrating the connecting portion is formed.

Next, the plug valve 75 with the plug 20 and the stopper 43 attached is attached to the gate valve 66, the gate valve 66 is opened (FIG. 7), and the cylindrical rotary shaft 76 is lowered and rotated to rotate the plug 20. The male screw 21 of the fitting 10 is screwed into the female screw 13 of the fitting 10,
The plug 20 is tightly fitted and attached (FIG. 8).

As shown in FIG. 9, the plug 20 mounted on the fitting 10 is provided with a male screw 21 on the outer peripheral portion thereof and an insertion hole 22 at the center thereof. Has an outer cylinder shaft 26 tightly fitted therein so as to be rotatable and vertically slidable. Further, the end of the outer cylinder shaft 26 is provided with an end female screw 27, and the plug 20 has an outer cylinder shaft 26. A fixing bolt 28 for fixing the plug to the plug 20 is provided.

Further, the outer cylinder shaft 26 can be fitted to the plug 20 so as not to slide vertically.
A stopper 43 is attached to the lower end of the outer cylinder shaft 26. The detailed structure of the stopper 43 is described in Japanese Patent Publication No. 48-27244 and JP-A-3-29249.
It is described in Japanese Patent Publication No. 1 and the description of this embodiment will be briefly described.

On the other hand, at the lower end of the outer cylinder shaft 26, the upper cam piece 33 having a female screw 34 on the inside is provided.
Is provided, and the upper cam piece 33 is formed so as to be inclined so that the lower portion has a small diameter (FIG. 9).

On the lower side of the upper cam piece 33, there is provided a lower cam piece 38 which is formed separately from the outer cylinder shaft 26 and has a left-handed internal thread 39 opposite to the internal thread 34.
The lower cam piece 38 is formed so that the upper portion has a small diameter.

The upper cam piece 33 and the lower cam piece 38 are
An inclined groove formed by inserting the upper cam piece 33 and the lower cam piece 38 inside the cylindrical stopper 43 fitted in the opening 6 formed in the connecting portion and forming the upper cam piece 33 and the lower cam piece 38 inside the stopper 43. It is fitted in 44 so that it cannot rotate but can slide up and down.

As shown in FIG. 10, the stopper 43 is formed of an elastic metal into a cylindrical shape, has a rubber plate 45 stretched on the outer peripheral surface thereof, and further has a vertical slit 49. The slit 49 is provided as a fluid flow port, and the stopper 43 can be enlarged and reduced. Further, a communication hole 50 is provided by making the circumferential position different from the slit 49 by approximately 90 degrees.

The expansion shaft 58 is attached to the outer cylinder shaft 26.
Is rotatably fitted tightly, an upper right male screw 59 on the lower part of the expansion shaft 58 is screwed onto a female screw 34 of the right screw of the upper cam piece 33, and the lower left part of the lower part of the expansion shaft 58 is The male screw 62 of the screw is screwed into the female screw 39 of the left screw of the lower cam piece 38, and the stopper 43 is rotated by turning the expansion shaft 58 to the left.
Of the stopper shaft 4 by rotating the expansion shaft 58 to the right.
3 is formed so that it can be reduced.

In the three-way valve device using the fitting of this embodiment, the stopper 43 is contracted to rotate the outer cylinder shaft 26 to rotate the stopper 43 so that the slit 49 of the stopper 43 and the communication hole 50 are positioned. Change.

When the expansion shaft 58 is rotated rightward with respect to the outer cylinder shaft 26, the upper cam piece 33 and the lower cam piece 38 are separated from each other in the axial direction, and the stopper 43 forces the stopper 43 to contract. Then, the stopper 43 separates from the openings 6 of the main pipe 1 and the branch pipe 2, and the stopper 43 can rotate or move upward.

Further, with respect to the outer cylinder shaft 26, an expansion shaft 58
Is rotated to the left, the upper cam piece 33 and the lower cam piece 38
Can approach in the axial direction, expand the stopper 43, and bring the outer peripheral surface of the stopper 43 into pressure contact with the openings 6 of the main pipe 1 and the branch pipe 2.

Communication hole 50 of stopper 43 of this embodiment
Are provided so that the positions in the circumferential direction differ from the slit 49 by 90 degrees, and the slit 49 of the stopper 43 and the communication hole 50 are provided.
When one of the main pipes 1 is matched with the branch pipe 2 and the stopper 43 is expanded (FIG. 11), one of the main pipes 1 and the branch pipe 2 communicate with each other, and the other of the main pipes 1 is closed.

When the slit 43 of the stopper 43 and the communication hole 50 are aligned with the other side of the main pipe 1 and the branch pipe 2 and the stopper 43 is expanded (FIG. 12), the other side of the main pipe 1 and the branch pipe 2 are expanded.
Communicate with each other, and one of the main pipes 1 is closed.

When either the slit 49 or the communication hole 50 of the stopper 43 is not aligned with the main pipe 1 and the branch pipe 2 and the stopper 43 is expanded (FIG. 13),
The main pipe 1 and the branch pipe 2 are closed.

14 to 19 show another embodiment of the stopper 43. As shown in FIG. Stopper 43 of this embodiment
Indicates that the communication hole 50 is located at a position approximately 1 from the slit 49 in the circumferential direction.
They are provided 30 degrees apart (Fig. 14).

When the stopper 43 is used, the other side of the main pipe 1 is communicated with the branch pipe 2 and one of the main pipes 1 is closed (FIG. 15). How to close the other side of the pipe 1 (Fig. 16), how to connect the main pipes 1 and 1 and close the branch pipe 2 (Fig. 17), main pipe 1
1 and the branch pipe 2 are closed (FIG. 18), and the stopper 43 is pulled upward so that the main pipe 1 and the branch pipe 2
You can use it to connect all of the items (Fig. 19).

20 to 23 show an embodiment in which the stopper 43 is provided with two communication holes 50 at two positions. In this embodiment, the positions of the stopper 43 in the circumferential direction are different from each other by 90 degrees from the slit 49, and the communication holes 50 are provided at two positions (FIG. 20).

When the stopper 43 is used, the main pipe 1
1 to connect all of the branch pipes 2 (Fig. 21), to connect one of the main pipes 1 to the branch pipe 2 and to close the other of the main pipes 1 (Fig. 22), to connect the main pipes 1.1 , Branch pipe 2
It can be used to close (Fig. 23).

24 to 26 show an embodiment in which a closing portion 54 is provided below the communication hole 50 of the stopper 43. In this embodiment, the positions in the circumferential direction of 90 degrees are different from the slits 49 of the stopper 43, respectively.
In the stopper 43 provided with the communication hole 50 at a position, the length of the stopper 43 is approximately twice as long as that of the stopper 43 shown in FIG. 10 and the like, and a closing portion that can close the opening 6 below the communication hole 50 of the stopper 43. 54 is provided.

The stopper 43 of the above embodiment is the slit 4
9 and the communication holes 50/50, and
In addition to the usage shown in Fig. 26, there is a usage in which all of the main pipes 1 and 1 and the opening 6 of the branch pipe 2 can be closed by the closing portion 54 of the stopper 43 (Fig. 26).

[0054]

The three-way valve device using the fitting of the present invention can be attached to the main pipe by the hot tap method without shutting off the flow of the main pipe in the part where the three-way valve device using fitting is attached. It can be installed.

Therefore, since the bypass pipe that bypasses the main pipe of the portion where the three-way valve device is mounted is not used, the number of parts used is small and the construction can be performed in a short time. Further, when the main pipe is a buried pipe, only the portion where the three-way valve device is mounted has to be excavated, so the amount of excavation is reduced.

Further, since the bypass pipe does not reduce the flow rate, there are few restrictions on the construction time.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view of the embodiment of the present invention seen from the upper surface during mounting.

FIG. 3 is a cross-sectional view of the embodiment of the present invention seen from the side during mounting.

FIG. 4 is a plan view of the embodiment of the present invention during mounting.

FIG. 5 is an exploded perspective view of a fitting according to an embodiment of the present invention.

FIG. 6 is a sectional view of the embodiment of the present invention seen from the side during mounting.

FIG. 7 is a sectional view of the embodiment of the present invention seen from the side during mounting.

FIG. 8 is a sectional view of the embodiment of the present invention seen from the side during mounting.

FIG. 9 is a sectional view of a plug and stopper assembly according to an embodiment of the present invention.

FIG. 10 is a perspective view of a stopper according to an embodiment of the present invention.

FIG. 11 is a diagram showing an implementation state of an embodiment of the present invention.

FIG. 12 is a diagram showing an implementation state of an embodiment of the present invention.

FIG. 13 is a diagram showing an implementation state of an embodiment of the present invention.

FIG. 14 is a sectional view of another embodiment of the stopper of the present invention.

FIG. 15 is a view showing an implementation state of another embodiment of the stopper of the present invention.

FIG. 16 is a view showing an implementation state of another embodiment of the stopper of the present invention.

FIG. 17 is a view showing an implementation state of another embodiment of the stopper of the present invention.

FIG. 18 is a view showing an implementation state of another embodiment of the stopper of the present invention.

FIG. 19 is a view showing an implementation state of another embodiment of the stopper of the present invention.

FIG. 20 is a sectional view of another embodiment of the stopper of the present invention.

FIG. 21 is a view showing an implementation state of another embodiment of the stopper of the present invention.

FIG. 22 is a view showing an implementation state of another embodiment of the stopper of the present invention.

FIG. 23 is a view showing an implementation state of another embodiment of the stopper of the present invention.

FIG. 24 is a front view of still another embodiment of the stopper of the present invention.

FIG. 25 is a perspective view of still another embodiment of the stopper of the present invention.

FIG. 26 is a cross-sectional view seen from the side in which yet another stopper of the present invention is incorporated.

FIG. 27 is a sectional view of the conventional example seen from the side during mounting.

FIG. 28 is an exploded perspective view of a conventional fitting.

FIG. 29 is a sectional view of the conventional example seen from the side during mounting.

FIG. 30 is a sectional view of the conventional example seen from the side during mounting.

FIG. 31 is a sectional view of the conventional example seen from the upper surface during mounting.

FIG. 32 is a sectional view of the conventional example seen from the side during mounting.

FIG. 33 is a cross-sectional view of the state in which the mounting of the conventional example is completed as seen from the side surface.

[Explanation of symbols]

 1 main pipe 2 branch pipe 6 opening 10 fitting 12 flange 20 plug 26 outer cylinder shaft 33 upper cam piece 34 male screw 38 lower cam piece 39 female screw 43 stopper 44 inclined groove 49 slit 50 communicating hole 54 closing portion 58 expansion shaft 59 male screw 62 Male screw

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomio Tsurumaki 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Inventor Kazuo Kobayashi 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Inventor Tomiyuki Kito 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Minor Nemoto 88 Ono-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Nippon Steel Pipe Construction Co., Ltd. (72) Inventor Yasue Unemoto 88 Ono-cho, Tsurumi-ku, Yokohama, Kanagawa Japan Steel Pipe Co., Ltd. (72) Inventor Tomio Hayashi 88, Ono-cho, Tsurumi-ku, Yokohama, Kanagawa Nippon Steel Pipe Co., Ltd.

Claims (4)

[Claims] 1. A branch pipe 2 is connected to a side surface of a main pipe 1, and a fitting 10 is mounted in a hermetically sealed structure so as to surround a connecting portion between the main pipe 1 and the branch pipe 2. An opening 6 opened with a cutter having a diameter larger than the diameter is provided so as to penetrate therethrough, a plug 20 is mounted on the flange 12 of the fitting 10, and an outer cylinder shaft 26 is rotatably and tightly fitted to the plug 20. An upper cam piece 33 provided with an internal thread 34 is provided at the lower end of the shaft 26, and a lower portion provided with an internal thread 39 opposite to the internal thread 34 formed separately from the outer cylinder shaft 26 below the upper cam piece 33. A cam piece 38 is provided, a cylindrical stopper 43 fitted in the opening 6 is provided, and inclined grooves 44 are provided so as to face each other at an upper portion and a lower portion inside the stopper 43, and the inclined portion 44 is provided with the upper cam. The piece 33 and the lower cam piece 38 cannot rotate but can slide up and down. The stopper 43 is provided with a vertical slit 49 and a communication hole 50 whose circumferential position is different from that of the slit 49, and the outer cylinder shaft 26 is provided with an expansion shaft 58.
Is rotatably tightly fitted, and the male screw 59 and the male screw 62 of the expansion shaft 58 are connected to the female screw 34 of the upper cam piece 33 and the lower cam piece 38.
A three-way valve device using a fitting that is screwed into the female screw 39 of FIG. 1 and that is capable of expanding the stopper 43 by rotating the expansion shaft. 2. A three-way valve device using a fitting according to claim 1, wherein the outer cylinder shaft 26 is tightly fitted to the plug 20 so as to be vertically slidable. 3. A three-way valve using the fitting according to claim 1 or 2, wherein the stopper 43 is provided with two communicating holes 50 which are provided at different positions in the circumferential direction from the slit 49. apparatus. 4. A three-way valve device using the fitting according to claim 2 or 3, wherein a closing portion 54 that can close the opening 6 is provided below the communication hole 50 of the stopper 43.