JP3787419B2 - Feeding method of water absorption pipe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for collecting sample water as a sample to be analyzed from the underground, and in particular, a method for collecting sample water by inserting a water absorption pipe into a guide hole provided in advance and performing suction from the ground. About.
[0002]
[Prior art]
As a conventional method used for collecting sample water to be analyzed from the underground, there are the following methods. In other words, a guide hole that extends to a predetermined position in the basement where the water to be collected exists is provided in advance, and a water absorption pipe provided with a plurality of water intake ports for collecting sample water is inserted into the guide hole. Then, the water absorption pipe is fed into the guide hole until the water absorption part reaches the position where the sample water exists, and in that state, negative pressure is applied from the ground to the water absorption pipe to suck the water from the water intake port, thereby Is used. This method is excellent in that sample water can be collected at an accurate underground position.
[0003]
However, in order to use this method, it is necessary to send the water absorption pipe to a predetermined position so as to slide in the guide hole, and at this time, the earth and sand are often clogged in the water absorption opening provided in the water absorption pipe. . When the water inlet is clogged in this way, the sample water cannot be collected efficiently even if a negative pressure is subsequently applied to the water absorption pipe.
[0004]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to provide a method for feeding a water absorption pipe in a guide hole provided in the ground while preventing clogging of earth and sand at a water absorption opening provided in the water absorption pipe.
[0005]
[Means for Solving the Problems]
In order to solve such a problem, in the present invention, a balloon that is configured to cover the entire water absorbing portion from the inside of the water absorbing tube when inflated inside the water absorbing tube provided with a water inlet in the water absorbing portion. Gas is supplied to the balloon so that the balloon that has been inserted and inflated is in contact with the entire water-absorbing part, and water is absorbed until the water-absorbing part reaches a predetermined position in a guide hole provided in advance while the water-absorbing port is closed with the balloon. By sending the pipe, the water absorption pipe is sent in the guide hole.
[0006]
That is, in the present invention, gas is supplied to the balloon inserted inside the water absorption pipe, and the water absorption pipe is fed into the guide hole while the expanded balloon is in contact with the entire water absorption portion. . If it does in this way, the water absorption pipe | tube in a guide hole can be sent, maintaining the state which covered the water inlet by the balloon surface. Therefore, the water absorption pipe in the guide hole can be sent while preventing the water absorption port from being clogged with earth and sand. The balloon need not be made of a resilient material. In addition, the balloon needs to be able to cover at least the entire water absorbing portion from the inside of the water absorbing tube when inflated. Therefore, the balloon may be in contact with the inner surface of the water absorption tube over the entire length of the water absorption tube.
[0007]
In this method, a deformable balloon is used as a means for closing the water inlet. Therefore, the balloon can be easily pulled out from the ground by feeding the water absorption pipe to a predetermined position and then removing the supplied gas to contract the balloon. This prevents the balloon from interfering with the inside of the water absorption pipe when the sample water is sucked. It is preferable to connect the wire inserted from the opening of the water absorption tube to the balloon and pull out the balloon from the water absorption tube by pulling the wire from the opening because the balloon can be easily pulled out. .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
With reference to FIG. 1, an embodiment of a water feeding pipe feeding method according to the present invention will be described. In FIG. 1, 1 is a guide hole. The guide hole 1 serves as a guide when the water absorption pipe 2 is sent in the ground. This guide hole 1 is provided in advance by an arbitrary method.
[0009]
The water absorption pipe 2 is sent along the guide hole 1 inside the guide hole 1. Since the guide hole 1 may be bent and provided, the water absorption pipe 2 is formed of a material that can be sent along the guide hole 1 while being bent.
[0010]
A water absorption part 3 is provided at the tip of the water absorption pipe 2. The water absorbing portion 3 is provided with a plurality of water inlets 4. This water inlet 4 is for absorbing the liquid outside the water absorption pipe 2 when the inside of the water absorption pipe 2 is sucked from the ground, and its shape is not particularly limited. The water inlet can be a small circular hole as shown, or a slit-shaped opening.
[0011]
A balloon 5 is inserted inside the water absorption pipe 1. The balloon 5 is configured to cover the entire water absorbing portion 3 from the inside of the water absorbing pipe 2 when it is inflated. In addition, since the balloon 5 can be deformed, the water intake port 4 can be covered without any gaps regardless of the shape of the water intake port 4. In addition, a tube 7 is connected to the balloon 5 via a cap 6, and gas can be sent through the tube 7.
[0012]
The balloon 5 into which the gas has been sent expands in the water absorption pipe 2 and enters a state in which the water absorption port 4 is covered from the inside of the water absorption pipe 2. In the state shown in the figure, gas is fed and the balloon is inflated. Since the water absorption pipe 2 is fed through the guide hole 1 while maintaining this state, the water intake 4 is not clogged with earth and sand.
[0013]
When the water absorption pipe 2 is sent in the guide hole 1 until the water absorption part 3 reaches a position where the liquid to be collected reaches a certain position, the gas in the balloon 5 is discharged through the tube 7. When the internal gas is extracted, the balloon 5 contracts and the water inlet 4 hole is opened. Next, when the gas is extracted from the balloon 5, the balloon 5 is extracted from the water absorption pipe 2 by winding the wire 8 connected to the base 6 from the ground. And the liquid which exists around the water absorption part 3 is attracted | sucked by attracting | sucking the inside of the water absorption pipe 2 from the ground in this state.
[0014]
【The invention's effect】
Since the method of the present invention is as described above, it is possible to feed the water absorption pipe through the guide hole provided in the ground while preventing the water inlet provided in the water absorption pipe from being clogged with earth and sand. To do.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view for explaining a first embodiment according to the present invention.
[Explanation of symbols]
1 Guide hole 2 Water absorption tube 3 Water absorption part 4 Water absorption port 5 Balloon 6 Base 7 Tube 8 Wire

Claims (6)

A deformable balloon is inserted into the water absorption pipe provided with a water intake port in the water absorption part so that the entire water absorption part can be covered from the inside of the water absorption pipe when expanded, and the expanded balloon absorbs water. Supply gas to the balloon so that the entire surface is in contact, and guide the water absorption tube until the water absorption portion reaches a predetermined position in the guide hole that has been drilled in the ground in advance, with the expanded balloon closing the water absorption port without any gap. Feeding method of water absorption pipe that is sent while bending along the hole . 2. The method of feeding a water absorption pipe according to claim 1 , wherein after feeding the water absorption pipe, the supplied gas is extracted, the balloon is deflated, and the balloon is pulled out from the water absorption pipe. The method of feeding a water absorption pipe according to claim 2, wherein the wire is connected to the balloon and the balloon is collected from the inside of the water absorption pipe by pulling the wire from the ground side opening of the water absorption pipe. In the water absorption pipe that has a water absorption part that penetrates and forms a water absorption port and collects sample water inserted into a guide hole formed in the ground,
It is formed of a tube material that can be bent along the guide hole, and has a balloon that can be expanded and contracted and deformed by gas inside the water absorption part,
The water-absorbing pipe is characterized in that the balloon is pressed against the water-absorbing part without any gap by expansion to close the water-absorbing port. The water absorption pipe according to claim 4, further comprising a tube having one end connected to the balloon and the other end extending to the ground through the pipe and supplying a gas for inflating the balloon.   The water absorption pipe according to claim 4 or 5, further comprising: a wire having one end connected to the balloon and pulling the other end from the ground side opening of the water absorption pipe to collect the balloon from the inside of the pipe.

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