JP2001324100A - Pipe water extracting method, water extracting device, and water extracting hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extract water in a pipe with less noise and facilitate a water extracting work of a buried pipe under ground regardless of place. SOLUTION: This pipe water extracting method comprises a traction jig mounting process of air-tightly mounting, to an opening end of a resin pipe 1, a traction jig G capable of air-tightly passing through the water extracting hose 11 having an opening 40 for extracting water at its one end, a pipe inserting process of pulling the traction jig and inserting the resin pipe into an existing pipe 4 having a recessed pipe part 4u, namely projecting downward, and a hose inserting process for inserting the water extracting hose through the traction jig so that an opening for water extraction intrudes into a place corresponding to the recessed pipe part of the resin pipe, and a pressurizing process for pressurizing the inside of the resin pipe in an inserted state of the water extracting hose.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water extraction method and a water extraction apparatus for removing water accumulated in existing pipes such as gas pipes and drain pipes, and resin pipes provided inside pipes in order to renew or renew existing pipes. It relates to a water extraction hose.

[0002]

2. Description of the Related Art A pipe such as a gas pipe buried in the ground is often formed with a downwardly convex concave pipe portion by bending in a vertical direction such as overturning. Liquid such as water may accumulate in the part. If the liquid accumulates in the pipe, the flow of gas becomes worse, it causes clogging, and it also causes deterioration of the pipe. Therefore, it is necessary to periodically remove the liquid accumulated in the pipe. or,
Water pipes, which always pass water, and drain pipes, which drain liquids,
In some cases, it is necessary to remove the water and waste liquid once inside due to construction and the like.

[0003] In order to drain the liquid in the pipe as described above, it is common practice to use a vacuum truck to suck out the collected liquid. Causes of accumulation of liquid in the gas pipe include groundwater inflow from a damaged portion caused by sandblasting, earth pressure change, and the like, and condensate generated when gas moves through a pipe having a temperature difference. In addition, when a resin pipe made of polyethylene or the like softened by heating steam is inserted through the existing pipe to renew or rehabilitate the existing pipe,
It is also conceivable that the condensate generated by cooling the steam is drained from the resin tube.

[0004]

In the conventional water extraction method,
Every time draining is necessary, it is necessary to prepare a vacuum car and secure a wide space for its installation, so that the water extraction work becomes large-scale, and the work noise caused by driving the vacuum car is large. was there. In addition, the water extraction method in the resin pipe interior construction method also requires a vacuum vehicle, and noise often becomes a problem.

An object of the present invention is to devise a method of extracting water from a pipe so that the extraction of water in the pipe can be performed with less noise. It is another object of the present invention to easily perform a water extraction operation on an underground pipe without selecting a place.

[0006]

[Means for Solving the Problem] [Structure] The water extraction method according to the first aspect is, as illustrated in FIGS.
An attachment 33b which can be inserted airtightly through a water extraction hose 35 provided on one end side with an opening 3 formed in the pipe 30
An attachment mounting step of hermetically mounting the water extraction hose 35a, a hose insertion step of inserting the water extraction hose 35 so that the water extraction opening 40 enters the concave pipe portion 30u of the pipe 30 which is convex downward, and a water extraction hose 35. And a pressurizing step of pressurizing the inside of the pipe 30 in a state of being airtightly inserted through the attachment 33b.

As shown in FIGS. 1 and 2, a water extraction method according to a second aspect of the present invention is a method for water extraction of a pipe, in which a water extraction hose 11 having a water extraction opening 40 at one end side is airtightly and freely insertable. Is attached to the open end of the resin tube 1 in an airtight manner, and the towing jig G is pulled into the existing pipe 4 having a concave tube portion 4u that is convex downward. The water extraction hose 11 is inserted through the tube insertion step of inserting the resin tube 1 and the drawing jig G such that the water extraction opening 40 enters the portion corresponding to the concave tube portion 4u of the resin tube 1. It has a hose insertion step and a pressurizing step of pressurizing the inside of the resin pipe 1 in a state where the water extraction hose 11 is inserted.

As shown in FIGS. 6 and 7, the water extraction device according to the third aspect of the present invention provides a water extraction hose such that the water extraction opening 40 enters into a concave pipe portion 30u of the pipe 30 buried underground, which is convex downward. 35, an opening / closing mechanism 37 for freely closing and opening the water extraction hose 35 is provided at the other end of the water extraction hose 35, and the other end of the water extraction hose 35 is extended to draw water from the other end. A water extraction device T is provided by providing a water extraction operation site ts where work can be performed.

As shown in FIG. 8, the water extraction hose according to the fourth aspect of the present invention is provided inside the soft hose 41 having the water extraction opening 40 provided at one end thereof, over substantially the entire length of the soft hose 41, and water extraction. A hard wire 43 having flexibility is inserted therethrough, leaving one end of the hard wire 43 in the vicinity of the water extraction opening 40, with the flow channel 42 remaining.

[0010] As described above, the reference numerals are used for convenience of comparison with the drawings, but the present invention is not limited to the method and configuration shown in the accompanying drawings.

According to the water extraction method of the first aspect, by performing the attachment mounting step, the water extraction hose can be inserted from the opening while the opening formed in the pipe is airtightly closed. By performing the hose insertion step, the water extraction opening of the water extraction hose inserted into the pipe enters the concave pipe portion. Liquids such as water existing in the pipes are collected and accumulated in the concave pipe portion, and the accumulated water is removed by the pressurizing step of pressurizing the inside of the pipe in a state where the water extraction hose is airtightly inserted through the attachment. From the lower end of the water extraction hose, and is pushed out from the other end of the hose.
As a result, water collected in the pipe can be extracted outside the pipe, and if no water exists in the pipe, water does not come out. You can also know if it is accumulated.

Then, in order to take out water from the water extraction hose, it is sufficient to pressurize the inside of the pipe, so that a conventional vacuum truck is not required.

According to the water extraction method of the present invention, after the pipe insertion step, the water extraction is performed by using the extraction jig used for inserting the resin pipe into the pipe, and airtightly inserting the extraction jig into the extraction jig. The hose is inserted so that the water extraction opening enters the portion corresponding to the concave tube portion of the resin tube. Since the water present in the resin pipe is collected and accumulated at the location corresponding to the concave pipe, if the inside of the resin pipe is pressurized while the water extraction opening is in the location corresponding to the concave pipe, the accumulated water is obtained. Is pushed into the inner side of the water extraction hose having a low pressure from the water extraction opening, and is pushed out from the other end of the hose.
As a result, water collected in the resin pipe can be extracted to the outside of the resin pipe.If water does not exist in the resin pipe, water does not come out. It is also possible to know whether or not water is accumulated in the pipe.

In order to take out water from the water extraction hose, it is sufficient to pressurize the inside of the resin pipe. For example, small equipment such as equipment (pressing machine) used for an airtight test after the interior work of the resin pipe may be used. No need for a vacuum car like this.

In addition, since the resin pipe interior construction method is performed by repeating the operation of inserting a resin pipe into an existing pipe in a set section, it is only necessary to prepare one water extraction hose. By allowing extraction of water in the resin pipe, for example, when supplying heated steam to expand and reduce the diameter of the reduced resin pipe, the flow of the heated steam is poor due to clogging of the resin pipe by water pools. This eliminates the disadvantage that the resin tube does not expand and expand diametrically well, resulting in a distorted cross-sectional shape.

According to the third aspect of the present invention, the water extraction opening enters the concave pipe portion where the liquid such as water collected in the pipe is stored, and the opening and closing mechanism is provided to perform the water extraction work near the ground surface. Since a water extraction hose having the other end that can be provided is provided, it is possible to remove water in the piping at any time by simply opening the opening and closing mechanism or opening the opening and closing mechanism and sucking it with a suction pump. In this way, it becomes unnecessary to dig the ground each time it becomes necessary and to prepare a vacuum car for sucking up the accumulated water and to secure a place for installing the vacuum car.

According to the water extraction hose of the fourth aspect, the water extraction opening is provided on the inside of the soft hose provided with the water extraction opening on one end side, substantially over the entire length of the soft hose, and leaving the water extraction flow path. When inserting a water extraction hose such that a flexible hard wire is inserted and one end of the hard wire is fixed near the water extraction opening, so that the water extraction opening enters the concave pipe portion of the piping. Also, when inserting the water extraction hose into the existing pipe having a concave pipe part and inserting the water extraction hose so that the water extraction opening enters the part corresponding to the concave pipe part of the resin pipe, As the length becomes longer, the operating force for inserting the water extraction hose, as in the past, does not transfer well to the vicinity of the water extraction opening, and the water extraction opening side is located at a location corresponding to the concave pipe part of the pipe or the resin pipe. It is difficult to move toward Scan may less that would accumulate slack in piping and resin tube.

That is, since the flexible hard wire is inserted through almost the entire length of the soft hose and one end thereof is fixed near the water extraction opening, the insertion length of the water extraction hose is long. Even if the water extraction hose is held by a hard wire so that it does not loosen, the operation force for inserting the water extraction hose can be easily transmitted to the vicinity of the water extraction opening, so that the water extraction opening side has a concave pipe part or resin pipe. It is easy to move toward the portion corresponding to the concave pipe portion, so that there is little possibility that the water extraction hose is loosened and stays in the pipe or the resin pipe.

[Effect] In the method for extracting water from a pipe according to the first aspect of the present invention, a vacuum hose is used to open the water collecting portion of the pipe, and then the inside of the pipe is pressurized. There is no need to secure vehicles and their installation locations, and there is no noise, so it is possible to perform water extraction work easily without choosing a place and to make almost no noise, which is economical. Environment-friendly water extraction in piping can be realized.

The method for extracting water of a pipe according to the second aspect is an existing facility in the case where an interior construction method of a resin pipe is performed by providing a water extraction hose which is opened at a water reservoir in the resin pipe and then pressurizing the inside of the resin pipe. It is possible to prepare only a simple device such as a pressurizing machine or a pressurizing machine for testing, or it is not necessary. In addition, it is possible to perform the draining operation while using only one water hose, and furthermore, suction with a vacuum truck. As in the case, it is not necessary to prepare a vacuum car and secure its installation place, and there is no noise, so it is possible to perform water extraction work easily without selecting a place and with almost no noise Thus, the extraction of the resin pipe in the pipe can be realized in an economical and environmentally friendly state.

According to the third aspect of the present invention, the water extraction device is relatively simple in structure such that the water extraction hose having an opening at a water reservoir in the buried pipe and having an opening / closing mechanism is extended near the ground surface. It is economical, does not involve large-scale drainage work, and, in addition, as in the case of suctioning with a vacuum car, preparing a vacuum car and securing the installation place, No noise is generated, and water can be repeatedly drawn in an environmentally friendly manner.

In the water extraction hose according to the fourth aspect, the water extraction opening side is difficult to move, and there is little possibility that the water extraction hose is loosened and stays in the pipe or the resin pipe. Even if the insertion length of the water extraction hose to the point corresponding to the concave pipe part of the resin pipe is long, the water extraction opening should enter the part corresponding to the concave pipe part of the piping or the concave pipe part of the resin pipe. , Can be inserted efficiently.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment FIGS. 1 and 2 show a gas pipe buried in the ground with a concave pipe part 4u bypassing another pipe 29 and bypassing downward. An example of the existing pipe in Item 2) shows a situation in which a PE (polyethylene) pipe, which is a thermoplastic synthetic resin pipe, is drawn in and housed. The procedure of the interior construction work of the PE pipe 1 (an example of the pipe of claim 1 and an example of the resin pipe of claim 2) will be briefly described. First, a work pipe is provided at both ends of the existing pipe 4A to be repaired among the gas pipes. Holes 10A and 10B are excavated and holes 10
An excavation step of cutting the existing pipe 4A is performed in A and 10B [see FIG.

With respect to the pipe 4 having both ends cut, one working hole 10B is directed toward the other working hole 10B.
Insert the towing line 2 and the steam hose 3 from the side of A, and insert the PE pipe 1 having an outer diameter smaller than the inner diameter of the pipe 4 and having a predetermined length into the other working hole 10B side. Prepare,
A towing jig G through which the water extraction hose 11 can be inserted in an airtight manner is hermetically attached to the open end of one pipe end 1a of the PE pipe 1.
(Towing jig mounting step) and a preparation step of mounting the plug 5 on the other tube end 1b is performed. [See FIG. 1 (b)].

As shown in FIG. 8, the water extraction hose 11 is provided inside a soft hose 41 formed of a soft heat-resistant resin such as nylon or Teflon having a water extraction opening 40 at one end. A single piano wire (high tensile strength steel wire) 43, which is an example of a flexible hard wire, is inserted through almost the entire length of the soft hose 41 and leaving the water extraction channel 42. One end of the piano wire 43 is fixed near the water extraction opening 40.

That is, at one end of the soft hose 41, a metal weight 44 having a water extraction opening 40 communicating with the soft hose 41 is fixed, and the one end where the water extraction opening 40 is provided faces downward. The end of the piano wire 43 is fixed to the weight 44 and the drum 4
The other end of the piano wire 43 is a free end so that the piano wire 43 and the soft hose 41 do not abut against each other even when the piano wire 5 is wound up.

As described above, since one end of the piano wire 43 is fixed to the weight 44, the operating force for inserting the water extraction hose 11 is adjusted so that the one end provided with the water extraction opening 40 moves downward. Since the water is easily transmitted to the vicinity of the water extraction opening 40, the water extraction opening 40 is easily inserted into a portion corresponding to the concave pipe 4u of the pipe 4A or the concave pipe 4u of the PE pipe 1.

Then, as shown in FIG. 2, the water extraction hose 11 is wound around a drum 45 supported rotatably about the horizontal axis, and the water extraction hose 11 of a required length is fed out to obtain PE.
The base of the soft hose 11 was connected to the cylindrical rotary shaft 46 of the drum 45, and the drain and the like extracted through the water extraction hose 11 were connected to the cylindrical rotary shaft 46 so as to be inserted into the pipe 1. The drain hose 47 allows drainage to drainage facilities such as the drainage basin 27.

Accordingly, even if the water extraction hose 11 has a winding habit around the drum 45 and the water extraction hose 11 inserted into the PE pipe 1 is deformed so as to rewind in an arc shape and is likely to be loosened, the water extraction hose 11 becomes loose. Since it can be held by the hard wire 43 so that it does not occur, the operating force for inserting the water extraction hose 11 is easily transmitted to the vicinity of the water extraction opening 40, and the water extraction hose 11 can be efficiently inserted into the PE pipe 1.

The tow line 2 and the steam hose 3 passed through the pipe 4 are pulled out from the other working hole 10B, and the tow line 2
Is connected to the towing portion 20b of the towing jig G via the guide body 6,
Further, the steam hoses 3 are respectively connected to the supply holes 23 of the towing jig G. In this state, the steam generator 26 is heated to perform a softening step of softening the PE pipe 1 by filling the PE pipe 1 with high-temperature heating steam through the steam hose 3.

When the PE pipe 1 is sufficiently softened, the pulling jig G is pulled back by the winch 9 or the like while the steam hose 3 is being pulled back, thereby pulling the other working hole 10B. The PE pipe 1 is drawn into the pipe 4 including the concave pipe portion 4u from the side, and the one end 1 on which the towing jig G is mounted is placed on the side of one working hole 10A.
An insertion step for extracting a is performed [see FIG. 1 (c)].

Then, the water extraction hose 11 is airtightly inserted into the PE pipe 1 through the insertion hole 24 formed in the towing jig G, and provided at the distal end 11a of the water extraction hose 11 through the towing jig G. A hose insertion step of stopping insertion is performed in a state where a certain water extraction opening 40 is in the vicinity of the bottom of the concave tube portion 4u (see FIG. 2 (d)). This is for draining the drain generated by the cooling of the heated steam in the PE pipe 1 to the outside of the pipe. Based on the positional relationship between the working hole 10A and the concave pipe portion 4u, the drain hose 11 is This can be done by determining the insertion length.

Next, a pressurizing step of operating the steam generator 26 under pressure to supply high-pressure steam through the steam hose 3 to pressurize the inside of the PE pipe 1 is performed. The aforementioned drain is
Since it collects and accumulates in the concave tube portion 4 u having a lower height than the surroundings, by performing the pressurizing step, the accumulated drain can be discharged out of the tube by being pushed out through the water extraction hose 11. If the drain is no longer discharged, the steam generator 26 is stopped, and the pressurizing step is terminated (see FIG. 2E). In addition, instead of the steam generator 26,
Water may be extracted using another pressurizing machine such as a compressor.

In the above-described pressurizing step, the dehumidifying gas, that is, the dry air having a lower humidity than the inside of the PE pipe 1 is supplied to the P pipe.
Even after the water supplied into the E pipe 1 is pressurized and the drain accumulated in the PE pipe 1 is extracted to the outside of the PE pipe 1, the dehumidifying gas is supplied to the P pipe
By continuing to supply the water into the E pipe 1 and discharging the water from the water extraction hose 11, the inside of the PE pipe 1 may be actively dried to prevent the generation of dew condensation water thereafter.

Second Embodiment A draining operation when the gas pipe (gas supply pipe) 30 is at the lowest position, that is, when the gas pipe 30 is closed due to the accumulation of water in the concave pipe portion 30u will be described. As shown in FIG.
First, the valve 31, 31 on each side of the clogged portion due to blockage is closed to close both sides of the concave tube portion 30u, and then the work hole 34 is dug (the order may be reversed), and the closed section is closed. A hole (opening) 30a is opened in the gas pipe 30 in the above. As shown in FIG. 4 (a), a saddle-type branch pipe 32 is joined to the hole 30a by welding or the like, and the same as that shown in the first embodiment, as shown in the first embodiment, so that the water extraction opening 40 enters the concave pipe part 30u. A hose insertion step of inserting the water extraction hose 35 toward the concave tube portion 30u is performed.
In this embodiment, as shown in FIG. 4, the water extraction hose 1 is attached to a drum 45 rotatably supported around a horizontal axis.
1 is wound so that a water extraction hose 11 of a required length can be fed out and inserted into the PE pipe 1.
1 is connected to the cylindrical rotary shaft 46 of the drum 45 and a drain hose 47 connected to the cylindrical rotary shaft 46 for draining water and the like extracted through the water extraction hose 11 is used for drainage basin 27.
It can be drained to drainage facilities such as.

Next, as shown in FIG. 4B, an attachment 33b through which the water extraction hose 35 can be inserted in an airtight manner is inserted.
Airtightly attached to the hole 30a through the saddle type branch pipe 32
(Attachment mounting step) The supply hose 33a forming the air supply path of the external pump 33 is attached to the attachment 33.
The air supply path of the external pump 33 is connected to the concave pipe section 30u through the attachment 33b by airtightly connecting to the outlet of the branch pipe 32 using b. Attachment 33b
Is inserted airtightly through the water extraction hose 11, and the branch pipe 32,
The supply hose 33a and the inside of the gas pipe 30 are communicated with each other while keeping the extraction hose 35 to be taken out in an airtight state.

Then, the external pump 33 is operated,
In a state where both sides of the concave pipe portion 30u are closed by the valves 31, 31, a pressurizing step of applying a pump pressure to the gas pipe 30 into which the water extraction hose 11 is hermetically inserted through the attachment 33b is performed. With the positive pressure in this pressurizing step, the accumulated water is pushed out of the pipe from the water extraction hose 35 to drain the drainage basin 2.
Water can be extracted to drainage facilities such as 7.

As described above, in a state in which both sides of the concave pipe portion 30u are closed, the pump 33 having an air supply passage communicating with the concave pipe portion 30u through the attachment 33b is operated to pressurize the gas pipe 30. Therefore, for example, the inside of the gas pipe 30 can be easily pressurized using a pump or the like used for an airtight test after the piping work.

Third Embodiment In place of the external pump 33 in the second embodiment, FIGS.
As shown in FIG. 5, the space between the branch pipe 32 and the water extraction hose 35 is sealed with an attachment 33b to make it airtight, and then both valves 31, 31 are opened to make a live pipe state.
Water may be extracted from the water extraction hose 35 by applying the gas pressure of the gas pipe 30 to the concave pipe portion 30u. In this case, there is an advantage that gas exchange in the pipe after the completion is not required, and the pipe can be quickly recovered and work efficiency is excellent. Further, if such a technique is used in the existing live pipe branching method, the water extraction hose can be inserted in a live pipe airtight state without performing a valve operation.

As described above, in the attachment mounting step, the attachment 33b is hermetically mounted in the opening 30a formed in the gas pipe 30, and in the pressurizing step, the pressure of the supply gas introduced into the concave pipe section 30u is increased. , Gas pipe 3
Since the inside of the gas pipe 30 is pressurized, it is possible to pressurize the inside of the gas pipe 30 without closing both sides of the concave pipe part 30u, and pressurized air is supplied into the gas pipe 30 and pressurized. In addition, there is no need to replace the pressurized air in the gas pipe 30 with the supply gas after the water extraction operation, and the water extraction operation can be simplified.

Fourth Embodiment As shown in FIG. 6, a water extraction hose 35 similar to that used in the second embodiment is extended laterally near the ground, and a nearby manhole 36 (an example of a water extraction work point ts) ), The tip of which is placed inside the valve, and a variable open / close valve (open / close mechanism 3)
Example of 7) A hose installation step of equipping 37A and permanently installing the hose may be performed, and as a result, the water extraction device T may be configured. That is, a water extraction hose 35 having a water extraction opening 40 inserted therein is provided in a concave pipe portion 30u of the pipe 4 buried underground, which is convex downward, and an opening / closing valve 37A capable of freely closing and opening the water extraction hose 35. Is provided on the other end side of the water extraction hose 35, the other end side of the water extraction hose 35 is extended, and a water extraction work site ts capable of water extraction from the other end side is formed near the ground surface to constitute the water extraction device T. You do it.

If the gas pressure in the active tube state is used, the on-off valve 37
By simply opening A, water collected in the gas pipe 30 can be extracted from the extraction hose 35. When the gas pressure is weak, water may be extracted using a suction device (not shown). By leaving the water extraction device T as described above, there is an advantage that the water can be extracted at any time without digging a working hole even if water is accumulated in the gas pipe 30 again.

Fifth Embodiment As shown in FIG. 7, a water extraction hose 35 similar to the one used in the second embodiment is extended to rise above the ground and is a plug (open / close mechanism 37) which can be opened and closed. Example) 3
7B, and a simple water removal device 39 (an example of the water extraction device T) which is provided with the plug 37B in a freely openable and closable box body 38 (an example of a water extraction work place ts) and is permanently disposed.
May be provided.

The concave pipe portions 4u and 30u also include the lower portion of the pipe arranged in a stepped horizontal shape, that is, a portion which is lower than the surroundings and in which a liquid such as water accumulates. I just need.

[Other Embodiments] The water extraction hose according to the present invention has the inside of a soft hose,
A wire made of FRP (fiber reinforced plastic) as a hard wire having flexibility may be inserted. 2. The water extraction hose according to the present invention has the inside of a soft hose,
A plurality of flexible hard wires may be inserted. 3. In the water extraction hose according to the present invention, one end of the hard wire inserted into the inside of the soft hose may be fixed near the water extraction opening, and the other end of the hard wire may be fixed near the outlet of the soft hose.

[Brief description of the drawings]

FIG. 1 shows an interior construction work for an existing pipe of a PE pipe.
Is a digging process, (b) is a preparation process, and (c) is an insertion process.

FIG. 2 shows an interior work for an existing pipe of PE pipe, (d) is a hose insertion step, and (e) is a pressurization step.

FIG. 3 is an operation diagram showing a gas pipe drilling step in gas pipe drawing work.

FIG. 4 shows a gas pipe drawing operation, in which (a) is a hose insertion step and (b) is a pressurization step.

FIG. 5 is an operation diagram showing another method of the pressurizing step of FIG.

FIG. 6 is a system diagram showing a water extraction device.

FIG. 7 is a system diagram showing a simple water collector.

FIG. 8 is a sectional view of a main part of a water extraction hose.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 resin pipe 4 existing pipe 4 u concave pipe section 30 u concave pipe section 11 water extraction hose 30 pipe 30 a opening 33 b attachment 35 water extraction hose 37 opening and closing mechanism 40 water extraction opening 41 soft hose 42 water extraction flow path 43 hard wire material G pulling jig ts Water extraction work point T Water extraction device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Toshimichi Kitaoka 4-1-2, Hiranocho, Chuo-ku, Osaka-shi, Osaka Inside Osaka Gas Co., Ltd. (72) Inventor Noboru Fujiwara 2 Tamade-higashi, Nishinari-ku, Osaka-shi, Osaka -9-41 Kinki Piping Co., Ltd. (72) Inventor Atsushi Naito 2-9-41 Kinki Piping Co., Ltd. F-term (reference) 3J071 AA12 BB02 BB11 BB14 CC11 DD23 EE05 FF03 FF12

Claims (4)

[Claims] 1. An attachment mounting step of hermetically mounting an attachment air-tightly insertable with a water extraction hose having a water extraction opening at one end side into an opening formed in a pipe.
A hose insertion step of inserting the water extraction hose so that the water extraction opening enters the concave pipe portion that becomes convex downward in the pipe, and the pipe in a state where the water extraction hose is airtightly inserted through the attachment. And a pressurizing step of pressurizing. 2. A towing jig mounting step of hermetically mounting a towing jig air-tightly insertable with a water extraction hose having a water extraction opening on one end side, at the opening end of the resin pipe, and the towing jig. A pipe insertion step of pulling the tool and inserting the resin pipe into an existing pipe having a concave pipe part that is convex downward, and a place corresponding to the concave pipe part of the resin pipe through the towing jig. A method of extracting water from a pipe, comprising: a hose insertion step of inserting the water extraction hose so that the water extraction opening is inserted into the resin extraction pipe; and a pressurizing step of pressurizing the inside of the resin pipe in a state where the water extraction hose is inserted. 3. A water extraction hose is provided such that a water extraction opening is inserted into a downwardly convex concave pipe part of a pipe buried underground, and an opening / closing mechanism capable of closing and opening the water extraction hose is provided with the water extraction hose. A water extraction device which is provided at the other end of the water extraction hose, and has a water extraction work site where the other end of the water extraction hose is extended to enable water extraction from the other end. 4. The inside of a soft hose provided with a water extraction opening on one end side, over substantially the entire length of the soft hose, and
A water extraction hose in which a flexible hard wire is inserted while leaving a water extraction channel, and one end of the hard wire is fixed near the water extraction opening.