JP3242266B2 - How to connect the pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a pipe for sending and discharging mud placed in a water pipe, a gas pipe, an oil pipe or the like when the pipe is laid by a muddy water propulsion method.

[0002]

2. Description of the Related Art For example, when laying a gas pipe or the like underground,
The propulsion method is widely used from the viewpoint of construction pollution such as intersection with existing structures, proximity or traffic treatment, noise and vibration. In this propulsion method, the muddy water propulsion method is often used in accordance with the extension of the propulsion length. In the muddy water propulsion method, as shown in the cross-sectional view of FIG. 8, the earth and sand excavated by the excavator 1 is sent out from the muddy water pump 2 and taken into the muddy water transported through the flexible pipe 3a and the muddy pipe 4 and discharged. In this method, the muddy water is sent to a muddy water treatment facility 7 by a mudging pump 5 through a muddy pipe 6 and a flexible pipe 3b. In the muddy water treatment facility 7, the sent muddy water is subjected to a classification process to adjust the muddy water to a predetermined property and circulate again as muddy water.

In this muddy water propulsion method, as shown in the partial cross-sectional view of FIG. 9, every time one cycle of propulsion is completed, a new pipe 8a is connected to the propelled existing pipe 8.
The starting pipe 9 separates the mud feeding pipe 4 and the mud discharging pipe 6 installed in the existing pipe 8 from the flexible pipes 3a and 3b, respectively.
Thereafter, the new pipe 8a is suspended from the starting shaft 9 and one end of the mud pipe 4a and the mud pipe 6a installed in the new pipe 8a is separated from the mud pipe 4 installed in the existing pipe 8 by the drain pipe 4a. The other end of the mud feeding pipe 4a and the other end of the mud discharging pipe 6a are connected to the flexible pipes 3a and 3b. Then, the new pipe 8a is joined to the existing pipe 8, and then the propulsion is performed again.

[0004]

SUMMARY OF THE INVENTION As described above,
Each time the cycle is completed, the sludge pipe 4 and the sludge pipe 6 installed in the existing pipe 8 at the starting shaft 9 are connected to the flexible pipe 3.
a, 3b, and the mud pipe 4 installed in the existing pipe 8
The new pipe 8a is joined to the existing pipe 8 after connecting the sludge pipe 4a and the drain pipe 6a installed in the new pipe 8a to the drain pipe 6 respectively, but a steel pipe is laid as a propulsion pipe. In this case, the new pipe 8a is joined to the existing pipe 8 by welding all around. When the new pipe 8a is welded to the existing pipe 8, the mud feed pipe 4 and the drain pipe 6 which are connected earlier become an obstacle, and a centering jig for aligning the groove cannot be used. It was difficult to carry out the welding accurately, and there was a risk of poor welding. In addition, it is necessary to check the welding state by an X-ray transmission test or the like.
And the image of the exhaust pipe 6 appears, and it is difficult to accurately inspect the welded portion.

[0005] This disadvantage can be solved by connecting the new pipe 8a to the existing pipe 8 and then connecting the sludge pipe 4 and the sludge pipe 6;
In the case of a small-diameter pipe, since it is impossible to work inside the pipe, the new pipe 8a is joined to the existing pipe 8, and then the mud feed pipe 4, the mud pipe 6
It was difficult to connect.

SUMMARY OF THE INVENTION The present invention has been made to solve such a disadvantage, and an object of the present invention is to provide a method of connecting a feed / discharge pipe capable of reliably welding and joining even a small-diameter propulsion pipe. It is.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a method of connecting a muddy pipe connected to a propulsion pipe. Connected to the excavator via an expansion joint that expands and contracts by one length, and propelled in a state where the expansion joint was extended,
After the propulsion, the flexible pipe connected to the muddy water treatment facility was removed from the mud pipe and the mud pipe arranged in the existing pipe, and the mud pipe and the mud pipe arranged in the existing pipe were placed in the new pipe. After connecting the sludge pipe and the sludge pipe respectively, reducing the extended expansion joint and storing the sludge pipe and the sludge pipe in the existing pipe,
After joining the existing pipe and the new pipe, joining the existing pipe and the new pipe, extend the expansion joint and connect the flexible pipe to the mud pipe, the mud pipe, the mud pipe and the end of the mud pipe respectively. It is characterized by the following.

[0008]

According to the present invention, the pipes are propelled by connecting the mud pipes and the mud pipes arranged in the propulsion pipe for transporting the muddy water and the muddy water through expansion joints which expand and contract by at least one propulsion pipe. Occasionally, a mud sending pipe and a mud draining pipe are arranged in the entire pipe for extending and propelling the expansion joint. One cycle promotion is over,
When connecting the new pipe to the propelled existing pipe, remove the flexible pipe from the mud pipe and the mud pipe arranged in the existing pipe, and place them in the new pipe in the mud pipe and the mud pipe arranged in the existing pipe. After connecting the supplied mud pipe and the drain pipe, the expanding expansion joint is reduced, the entire mud pipe and the mud pipe are stored in the existing pipe, and the pipe is sent from the junction between the existing pipe and the new pipe. Remove mud pipes and drain pipes. As described above, the existing pipe is centered on the existing pipe and the existing pipe and the new pipe are welded in a state where there is no mud feed pipe and no drain pipe at the junction between the existing pipe and the new pipe.

[0009]

1 and 2 show a muddy water propulsion method according to an embodiment of the present invention. FIG. 1 is a side sectional view, and FIG. 2 is a top sectional view. As shown in the figure, a mud feed pipe 4 for transporting muddy water to the excavator 1 and a mud drainage pipe 6 for transporting muddy water containing sediment excavated by the excavator 1 are connected to the excavator 1 via a telescopic device 10. Have been. As shown in FIG. 3, for example, the telescopic device 10 is composed of a multi-stage telescopic tube, and has two sets of telescopic joints 11a and 11b that expand and contract by at least the length of one propulsion pipe while muddy water is contained therein. A multi-stage hydraulic cylinder 12 fixed to both ends of expansion joints 11a and 11b, and a hydraulic unit 13 for supplying hydraulic oil to the multi-stage hydraulic cylinder 12
And The expansion joint 11 a is connected between the excavator 1 and the mud pipe 4, and the expansion joint 11 b is connected between the excavator 1 and the drain pipe 6. A rotatable traveling wheel 14 is attached to a lower portion of the mud pipe 4 and the drain pipe 6 so that the mud pipe 4 and the drain pipe 6 can move along the inner surface of the propulsion pipe by the rotation of the traveling wheel 14. Has become.

When the pipe 8 is propelled, FIGS.
As shown in (1), the hydraulic unit 13 is driven to extend the expansion joints 11a and 11b by the multi-stage hydraulic cylinder 12, and the mud feeding pipe 4 and the mud discharging pipe 6 are arranged over the entire pipe 8 to be propelled. In this state, the muddy water sent from the muddy water treatment facility 7 is supplied to the flexible pipe 3a, the muddy pipe 4, and the expansion joint 11
a through the expansion joint 11b, the mud pipe 6 and the flexible pipe 3b, the muddy water treatment facility 7
Sent to.

The operation when one cycle of propulsion is completed in this muddy water propulsion method and the new pipe 8a is connected to the existing pipe 8 will be described with reference to the construction process diagram of FIG. In FIG. 4, only the sludge pipe 4 of the sludge pipe 4 and the sludge pipe 6 is shown for simplification of the drawing.

First, as shown in FIG. 4A, a mud feeding pipe 4 and a mud discharging pipe 6 arranged in an existing pipe 8 in a starting shaft 9.
After the flexible pipes 3a and 3b are removed from the pipe, the new pipe 8a is suspended from the starting shaft 9, and as shown in FIG. 4 (b), the mud pipe 4a and the mud pipe installed in the new pipe 8a. 6a is connected to one end of the mud pipe 4 installed in the existing pipe 8.
And the exhaust pipe 6. Next, the hydraulic unit 13 is driven and the expansion joint 11 is moved by the multi-stage hydraulic cylinder 12.
a and 11b are reduced, and the whole of the sludge pipe 4 and the sludge pipe 6 including the newly connected sludge pipe 4a and sludge pipe 6a are stored in the existing pipe 8. By storing the entirety of the sludge pipe 4 and the sludge pipe 6 in the existing pipe 8 in this way, it is possible to remove the sludge pipe 4 and the sludge pipe 6 from the junction between the existing pipe 8 and the new pipe 8a. it can.

In this state, the center of the new pipe 8a is aligned with the existing pipe 8, and the welding of the existing pipe 8 and the new pipe 8a is performed. When performing this welding operation, since the mud feed pipe 4 and the mud discharge pipe 6 are removed from the joint between the existing pipe 8 and the new pipe 8a, the centering can be reliably performed using a jig, and the welding can be performed. The subsequent X-ray transmission test can be performed with high accuracy, and high-quality welding can be performed.

After the welding of the existing pipe 8 and the new pipe 8a is completed, the hydraulic unit 13 is driven again to drive the expansion joint 11 by the multi-stage hydraulic cylinder 12 as shown in FIG.
a, 11b are extended, and the mud feeding pipe 4 and the mud discharging pipe 6 are arranged over the entire pipe 8 to be propelled. Flexible pipes 3a and 3b are connected to the ends of the sludge pipe 4 and the sludge pipe 6, respectively, to supply muddy water through the sludge pipe 4, and to collect the sludge water through the sludge pipe 6 while propelling. I do. Each time one cycle of the propulsion is completed, the above steps are repeated. When this process is repeated, the expansion joints 11a and 11b can be easily expanded and contracted by the multi-stage hydraulic cylinder 12 having a large output.

Note that the above-described embodiment uses the expansion joints 11a and 11a.
Although the case where b is constituted by a multi-stage telescopic tube has been described, the telescopic joints 11a and 11b composed of the bellows hose 15 may be used as shown in FIG.

In the above embodiment, the expansion joints 11a, 11a
Although the case where b is extended and retracted by the multi-stage hydraulic cylinder 12 has been described, a winding mechanism using a rope, a belt, a chain, or the like is used to drive the hydraulic motor or the electric motor to extend and retract. The joints 11a and 11b may be expanded and contracted.

For example, as shown in FIG.
a, a wire rope 17 wound a plurality of times around a pulley 16 driven by a hydraulic motor 15 attached to the rear end of the wire rope 17;
Frame 1 holding end of expansion joints 11a and 11b
8 are fixed to the front end 19 and the rear end 20 of the hydraulic motor 15.
Can be easily expanded and contracted by rotating the expansion joints 11a and 11b.

As shown in FIG. 7, a wire rope 17 having ends fixed to a front end 19 and a rear end 20 of a frame 18, and a frame provided at the rear ends of expansion joints 11a and 11b. 1
Pulley 21 mounted facing the front end 19 of the pulley 8
And the hydraulic motor 1 attached to the end of the frame 18
5 and a pulley 23 attached to the rear end of the frame 18 and the rear ends of the expansion joints 11a and 11b facing the rear end 20 of the frame 18. Even if a traversing device having a pulley 24 mounted thereon and a wire rope 17 wound around each of the pulleys 21 to 24 is used, the expansion joints 11a, 11a, 11
b can be expanded or contracted.

[0019]

As described above, according to the present invention, a mud feeding pipe and a mud pipe arranged in a propulsion pipe for transporting muddy water and muddy water are connected via an expansion joint which expands and contracts at least one propulsion pipe. When the propulsion pipe is propelled, the expansion joint is extended and propelled, and when the propulsion pipe is connected, the expansion joint is contracted to remove the mud pipe and the exhaust pipe from the joint of the pipe. When welding pipes, a centering jig can be used to adjust the groove, and the groove can be surely aligned and the X-ray transmission test after welding can be performed accurately. The propulsion pipe can be joined by high quality welding.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a muddy water propulsion method according to an embodiment of the present invention.

FIG. 2 is a top sectional view showing a propulsion unit of the embodiment.

FIG. 3 is a configuration diagram showing a telescopic device of the embodiment.

FIG. 4 is a connection process diagram showing a process of connecting an existing pipe and a new pipe.

FIG. 5 is a configuration diagram showing a telescopic device according to a second embodiment.

FIG. 6 is a configuration diagram illustrating a telescopic device according to a third embodiment.

FIG. 7 is a configuration diagram illustrating a telescopic device according to a fourth embodiment.

FIG. 8 is a sectional view showing a configuration of a muddy water propulsion method.

FIG. 9 is a partial cross-sectional view showing a connection state of a new pipe.

[Explanation of symbols]

 3a, 3b Flexible pipe 4 Mud feeding pipe 6 Drain pipe 8 Existing pipe 8a New pipe 9 Starting shaft 10 Telescopic device 11a, 11b Expansion joint 12 Multistage hydraulic cylinder 13 Hydraulic unit 14 Traveling wheel 15 Hydraulic motor 16 Puri 17 Wire rope 21-24 pulley

────────────────────────────────────────────────── ─── Continuing on the front page (72) Takashi Nakajima, 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Teruyuki Matsumoto 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan (72) Inventor Yasuhiro Matsuo 122-6 Shimotsu Kokyu, Atsugi-shi, Kanagawa Prefecture (72) Inventor Satoshi Furuya 391-3 Minami-Toyoda, Hiratsuka-shi, Kanagawa Prefecture Happi-Shat-201 (72) Inventor Satoshi Mukai Ibaraki, Osaka Prefecture 2-12-5, Nishifukui, Nishi-shi (72) Inventor Kenichiro Miyazaki 131-2-905, Aruse, Igawaya-cho, Nishi-ku, Kobe-shi, Hyogo (56) References JP-A-61-95200 (JP, A) JP-A-60-5997 (JP, a) JP Akira 58-106095 (JP, a) JP Akira 61-83799 (JP, a) JitsuHiraku Akira 61-101188 (JP, U) (58 ) investigated the field (Int.Cl. ⁷ , DB name) F16L 1/024

Claims (1)

(57) [Claims] In a muddy water propulsion method in which sediment excavated in muddy water sent from a muddy water treatment facility is taken out and transported to the muddy water treatment facility as muddy water, the mud pipe is disposed in a pipe to be propelled and transports muddy water. And a mud pipe for transporting mud water are connected to the excavator via expansion joints that expand and contract by at least the length of at least one propulsion pipe, and the expansion joint is propelled in an extended state. The flexible pipe connected to the muddy water treatment facility is removed from the mud pipe and the mud pipe arranged in the existing pipe, and the mud pipe arranged in the new pipe in the mud pipe and the mud pipe arranged in the existing pipe. After connecting the pipe and the mud pipe, the expanded expansion joint is reduced, the mud pipe and the mud pipe are stored in the existing pipe, the existing pipe and the new pipe are joined, and the existing pipe and the new pipe are joined. , The expansion joint is extended, Supply and discharge mud pipe connection method characterized by connecting the respective flexible pipe to the end of the mud pipe and the waste sludge tube.