JP7015028B1 - How to clean the strainer part of the well - Google Patents

How to clean the strainer part of the well Download PDF

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JP7015028B1
JP7015028B1 JP2021128432A JP2021128432A JP7015028B1 JP 7015028 B1 JP7015028 B1 JP 7015028B1 JP 2021128432 A JP2021128432 A JP 2021128432A JP 2021128432 A JP2021128432 A JP 2021128432A JP 7015028 B1 JP7015028 B1 JP 7015028B1
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博宜 中谷
正義 井上
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東京ファシリティーズ株式会社
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Abstract

【課題】井戸の内部に加圧送水することでストレーナ部の付着物を除去するための井戸のストレーナ部の洗浄方法につき、該井戸の内部に設置されている関連機器を設置したままにして、該ストレーナ部の付着物を十分に除去することができる方法及びそれに用いる井戸の開口部用蓋部材を提供する。【解決手段】井戸1の内部に加圧送水することで、井戸1の内部に圧入された水がストレーナ部Sの内側から外側へと圧出されてストレーナ部Sの付着物を除去する方法であって、井戸1の内部にその関連機器を設置したままの状態で、井戸の開口部用蓋部材12で井戸の開口部7を閉鎖し、井戸1からの揚水を停止した上で、井戸1の内部への加圧送水の実施とその休止を交互に複数回繰り返してストレーナ部Sの付着物を除去する井戸のストレーナ部の洗浄方法、及びこれに用いる井戸の開口部用蓋部材12である。【選択図】 図2PROBLEM TO BE SOLVED: To provide a method for cleaning a strainer portion of a well for removing deposits on the strainer portion by supplying pressurized water to the inside of the well, while keeping related equipment installed inside the well installed. Provided are a method capable of sufficiently removing deposits on the strainer portion and a lid member for opening a well used therein. SOLUTION: By pressure-feeding water into the inside of a well 1, the water pressed into the inside of the well 1 is pushed out from the inside to the outside of the strainer portion S to remove the deposits of the strainer portion S. Therefore, with the related equipment installed inside the well 1, the opening 7 of the well is closed by the lid member 12 for the opening of the well, the water pumping from the well 1 is stopped, and then the well 1 is used. A method for cleaning the strainer portion of a well that removes deposits on the strainer portion S by alternately repeating the implementation of pressurized water supply to the inside of the well and its suspension a plurality of times, and a lid member 12 for a well opening used for this method. .. [Selection diagram] Fig. 2

Description

本願発明は、井戸に設置されているストレーナ部に付着する砂、泥、微生物といった各種の物質を除去する方法に関するものである。 The present invention relates to a method for removing various substances such as sand, mud, and microorganisms adhering to a strainer portion installed in a well.

まず、ボーリング工事によって設置される一般な井戸(1)の構造について説明する。井戸(1)は、図6に図示するように、ボーリング工事等で掘削した井戸穴(2)の内部にケーシング(3)及びストレーナ(4)が設置されているとともに、井戸穴(2)の内壁とケーシング(3)及びストレーナ(4)の外壁との間には砂利(5)が詰められている。ケーシング(3)は取水を所望する帯水層以外の深さに設置する筒状の部材であって、地下水がケーシング(3)を介して井戸の内部に流入しないように、ケーシング(3)には取水孔が設けられていない。これに対して、ストレーナ(4)は取水を所望する帯水層に設置する筒状の部材であって、取水を所望する帯水層に所在する地下水がストレーナ(4)を介して井戸(1)の内部へと流入するように、ストレーナ(4)には取水孔が設けられている。尚、ストレーナ(4)はスクリーンとも呼称されている。ストレーナ(4)の外周面には、井戸(1)の内部に砂等の井戸水以外の物質が流入しないように、更に網状の部材で形成された井戸用ネット(6)を被せることもある。図では、井戸用ネット(6)は、ストレーナ(4)にだけ被せられているが、ケーシング(3)とストレーナ(4)の双方に被せられることもある。本願では、ストレーナ(4)とそれを覆う井戸用ネット(6)を合わせてストレーナ部(S)と呼称する。砂利(5)も井戸(1)の内部に砂等の井戸水以外の物質が流入しないように、井戸水を濾過するために用いられる。そして、井戸の開口部(7)から内部へと吊り下げる等して井戸の内部に揚水ポンプ(8)を設置するとともに、揚水ポンプ(8)に適当な長さの揚水管(9)を連結することで、井戸(1)内の地下水を汲み上げるのである。揚水管(9)には揚水バルブ(10)が装着されており、揚水量の調節を行うことができるようになっている。更に、井戸(1)の汚損を防止するといった目的で、その開口部(7)の周囲が井戸用カバー(11)によって覆われることもある。 First, the structure of a general well (1) installed by boring work will be described. As shown in FIG. 6, the well (1) has a casing (3) and a strainer (4) installed inside a well hole (2) excavated by boring work or the like, and the well hole (2) has a casing (3). Gravel (5) is packed between the inner wall and the outer wall of the casing (3) and the strainer (4). The casing (3) is a tubular member installed at a depth other than the desired aquifer for water intake, and is placed in the casing (3) so that groundwater does not flow into the well through the casing (3). Is not provided with a water intake hole. On the other hand, the strainer (4) is a tubular member installed in the aquifer where water intake is desired, and the groundwater located in the aquifer where water intake is desired is a well (1) via the strainer (4). ) Is provided with an intake hole in the strainer (4) so as to flow into the inside of the strainer (4). The strainer (4) is also called a screen. The outer peripheral surface of the strainer (4) may be further covered with a well net (6) made of a mesh member so that substances other than well water such as sand do not flow into the well (1). In the figure, the well net (6) is covered only on the strainer (4), but may be covered on both the casing (3) and the strainer (4). In the present application, the strainer (4) and the well net (6) covering the strainer (4) are collectively referred to as a strainer portion (S). The gravel (5) is also used to filter the well water so that substances other than the well water such as sand do not flow into the well (1). Then, a pumping pump (8) is installed inside the well by suspending it from the opening (7) of the well to the inside, and a pumping pipe (9) of an appropriate length is connected to the pumping pump (8). By doing so, the groundwater in the well (1) is pumped up. A pumping valve (10) is attached to the pumping pipe (9) so that the amount of pumped water can be adjusted. Further, for the purpose of preventing the well (1) from being soiled, the periphery of the opening (7) may be covered with a well cover (11).

ここで、ストレーナ部(S)はその外部から内部へと地下水が流入する際に、砂等がその内部に流入することを防止できる。しかしながら、井戸(1)を設置する場所やストレーナ部(S)が位置する深さにおける地質等により多少の差異はあるものの、特にストレーナ(4)の取水孔や井戸用ネット(6)に砂、泥、微生物といった各種の物質が付着することがある。そうすると、該付着物によって該取水孔が閉塞したり井戸用ネット(6)が目詰まりしたりして、地下水がストレーナ部(S)の内部に流入しなくなる結果、井戸(1)の揚水量が減少したりひいては皆無になったりしてしまうという問題があった。 Here, the strainer portion (S) can prevent sand or the like from flowing into the inside of the strainer portion (S) when the groundwater flows from the outside to the inside. However, although there are some differences depending on the location where the well (1) is installed and the geology at the depth where the strainer portion (S) is located, sand, especially in the intake hole of the strainer (4) and the well net (6), Various substances such as mud and microorganisms may adhere. Then, the intake hole is blocked or the well net (6) is clogged by the deposit, and the groundwater does not flow into the strainer portion (S). As a result, the amount of pumped water in the well (1) increases. There was a problem that it decreased or eventually disappeared.

そこで、上記のような問題を解決すべく、井戸(1)の内部へと加圧送風ないし加圧送水を実施することで、井戸のストレーナ部(S)における各種の付着物を除去してこれを洗浄する方法が提案されている。即ち、ストレーナの内部に開口する洗浄用パイプを予め設けておき、該洗浄用パイプから気体ないし液体を噴出させることでストレーナ部の付着物を除去する方法(例えば、下記の特許文献1を参照)、先端に超高圧回転噴射ノズルを設けた超高圧水ホースを井戸のケーシング管内に吊り下げ、該ケーシング管のストレーナに超高圧回転噴射ノズルから超高圧水を噴射させながら回転させ、該ストレーナに付着している各種の付着物を除去する方法(例えば、下記の特許文献2を参照)、井戸のパイプの上端開口部につき、ポンプの送水管の連結部を設けた閉塞盤で密閉し、ポンプを作動して井戸パイプ内に20Kg/cm以上の圧力水を圧入させ、続いてピストンを挿入して急激な昇降を繰返して加圧吸引を行うことを特徴とする井戸の再活法(例えば、下記の特許文献3を参照)等が提案されている。 Therefore, in order to solve the above-mentioned problems, various deposits in the strainer portion (S) of the well are removed by performing pressurized air blowing or pressurized water supply to the inside of the well (1). A method of cleaning has been proposed. That is, a method in which a cleaning pipe that opens inside the strainer is provided in advance, and a gas or liquid is ejected from the cleaning pipe to remove deposits on the strainer portion (see, for example, Patent Document 1 below). , An ultra-high pressure water hose provided with an ultra-high pressure rotary injection nozzle at the tip is hung in the casing pipe of the well, and the strainer of the casing pipe is rotated while injecting ultra-high pressure water from the ultra-high pressure rotary injection nozzle to adhere to the strainer. A method for removing various deposits (see, for example, Patent Document 2 below), the upper end opening of a well pipe is sealed with a closing plate provided with a connecting portion of a water pipe of the pump, and the pump is closed. A well revitalization method (eg, for example) characterized in that a pressure water of 20 kg / cm 2 or more is press-fitted into a well pipe by operation, and then a piston is inserted and rapid ascent and descent is repeated to perform pressure suction. (See Patent Document 3 below) and the like have been proposed.

上記のような井戸のストレーナ部の洗浄方法によれば、井戸の内部に圧入された風や水がストレーナ部の内側から外側へと圧出される。そうすることで、ストレーナ部の付着物が剥がれて、該取水孔が開放されたり井戸用ネットの目詰まりが解消されたりすることで、再び地下水がその内部に流入し得るようになる。 According to the method for cleaning the strainer portion of the well as described above, the wind or water pressed into the inside of the well is pushed out from the inside to the outside of the strainer portion. By doing so, the deposits on the strainer portion are peeled off, the intake hole is opened, and the clogging of the well net is cleared, so that the groundwater can flow into the inside again.

特開平5-31306号公報Japanese Unexamined Patent Publication No. 5-31306 特開2001-193106号公報Japanese Unexamined Patent Publication No. 2001-193106 特開昭60-16626号公報Japanese Unexamined Patent Publication No. 60-16626

しかしながら、前記のような従来技術に係る井戸のストレーナ部の洗浄方法では、井戸の内部へと一定の圧力をもって加圧送風ないし加圧送水するところ、ストレーナ部の付着物の粘性が高いといった理由から強固に付着していると、このような方法ではこれを十分に除去できないことがあった。 However, in the method for cleaning the strainer portion of a well according to the prior art as described above, when pressurized air blowing or pressurized water is sent to the inside of the well with a constant pressure, the viscosity of the deposits on the strainer portion is high. If it adheres strongly, it may not be sufficiently removed by such a method.

そこで、本願発明が解決しようとする第1の課題は、井戸の内部に加圧送水することでストレーナ部の付着物を除去するための井戸のストレーナ部の洗浄方法につき、ストレーナ部の付着物を十分に除去することができる方法を提供することにある。 Therefore, the first problem to be solved by the present invention is the method of cleaning the strainer portion of the well for removing the deposits on the strainer portion by supplying pressurized water to the inside of the well. The purpose is to provide a method that can be sufficiently removed .

また、上記の場合、送水する圧力を高めて井戸の内部へと加圧送水すれば、井戸内に圧入された水が更に高い圧力を持ってストレーナ部の内側から外側へと圧出されることになるため、該付着物を除去し易くなるとも考えられる。しかしながら、過度に圧力を高めて加圧送水すると、揚水ポンプといった該井戸の内部に設置されている関連機器を損傷させるおそれがある。そのため、従来技術に係る井戸のストレーナ部の洗浄方法にあっては、該井戸の内部に設置されている関連機器をいったん撤去してから、該井戸の内部に加圧送水してストレーナ部の付着物を除去し、該関連機器を該井戸の内部に再度設置していたため、その作業が煩雑であった。 Further, in the above case, if the pressure to be sent is increased and the water is pressurized and sent to the inside of the well, the water pressed into the well is pushed out from the inside to the outside of the strainer portion with a higher pressure. Therefore, it is considered that the deposits can be easily removed. However, if the pressure is excessively increased to supply pressurized water, there is a risk of damaging related equipment installed inside the well, such as a pump. Therefore, in the method of cleaning the strainer portion of a well according to the prior art, after removing the related equipment installed inside the well, pressurized water is sent to the inside of the well to attach the strainer portion. The work was complicated because the kimono was removed and the related equipment was re-installed inside the well.

そこで、本願発明が解決しようとする第2の課題は、井戸の内部に加圧送水することでストレーナ部の付着物を除去するための井戸のストレーナ部の洗浄方法につき、該井戸の内部に設置されている関連機器を設置したままにして該井戸の内部に加圧送水を行ってストレーナ部の付着物を除去する方法を提供することにある。 Therefore, the second problem to be solved by the present invention is to install the method of cleaning the strainer portion of the well inside the well in order to remove the deposits on the strainer portion by supplying pressurized water to the inside of the well. It is an object of the present invention to provide a method for removing deposits on a strainer portion by performing pressurized water supply to the inside of the well while keeping the related equipment installed.

本願発明は、上記の各課題を解決するために提案されたものであり、以下の構成を有するものである。以下では、本願発明の構成を理解することを補助するために、本願に添付した図面に表示した番号及び符号をあわせて記載する。 The present invention has been proposed to solve each of the above problems, and has the following configurations. In the following, in order to assist in understanding the configuration of the present invention, the numbers and reference numerals displayed in the drawings attached to the present application are also described.

請求項1に係る井戸のストレーナ部の洗浄方法は、井戸(1)の内部に加圧送水することで、井戸(1)の内部に圧入された水が井戸(1)に設置されているストレーナ部(S)の内側から外側へと圧出されてストレーナ部(S)の付着物を除去する方法であって、井戸(1)の内部にその関連機器を設置したままの状態で、井戸の開口部用蓋部材(12)で井戸の開口部(7)を閉鎖し、井戸(1)からの揚水を停止した上で、井戸(1)の内部への加圧送水の実施とその休止を交互に複数回繰り返してストレーナ部(S)の付着物を除去する方法である。 The method for cleaning the strainer portion of the well according to claim 1 is a strainer in which water pressed into the well (1) is installed in the well (1) by pressurizing and sending water to the inside of the well (1). It is a method of removing the deposits of the strainer portion (S) by being pushed out from the inside to the outside of the portion (S), and the related equipment is installed inside the well (1). After closing the opening (7) of the well with the lid member (12) for the opening and stopping the pumping from the well (1), the pressure water supply to the inside of the well (1) and its suspension are stopped. This is a method of removing deposits on the strainer portion (S) by alternately repeating the process a plurality of times.

請求項2に係る井戸のストレーナ部の洗浄方法は、請求項1に記載した井戸のストレーナ部の洗浄方法であって、前記加圧送水はその圧力を加圧送水装置(15)において2kgf/cm2以上であって10kgf/cm2以下とし、該加圧送水を実施する時間を1回につき5分間とし、該加圧送水を休止する時間は1回につき2ないし3分間とし、該加圧送水の実施と休止を交互に2ないし3回繰り返す方法である。 The method for cleaning the well strainer portion according to claim 2 is the method for cleaning the well strainer portion according to claim 1, wherein the pressure of the pressurized water supply is 2 kgf / cm in the pressurized water supply device (15). It is 2 or more and 10 kgf / cm 2 or less, the time for performing the pressurized water supply is 5 minutes at a time, and the time for suspending the pressurized water supply is 2 to 3 minutes at a time, and the pressurized water supply is performed. It is a method of repeating the implementation and the rest alternately two or three times.

請求項3に係る井戸のストレーナ部の洗浄方法は、請求項1又は2に記載した井戸のストレーナ部の洗浄方法であって、前記井戸(1)の内部への加圧送水につき、井戸の開口部用蓋部材(12)に設けられている加圧送水管口(12a)に取り付けた加圧送水管(13)を介してこれを行う方法である。 The method for cleaning the strainer portion of a well according to claim 3 is the method for cleaning the strainer portion of a well according to claim 1 or 2, wherein the well is opened with respect to the pressurized water supply to the inside of the well (1). This is a method of doing this via a pressurized water supply pipe (13) attached to a pressurized water supply pipe port (12a) provided on the part lid member (12).

請求項4に係る井戸のストレーナ部の洗浄方法は、請求項1又は2に記載した井戸のストレーナ部の洗浄方法であって、井戸(1)の内部への加圧送水につき、井戸(1)を形成するケーシング(3)の側面に設けられている加圧送水管口(3a)に取り付けた加圧送水管(13)を介してこれを行う方法である。 The method for cleaning the strainer portion of the well according to claim 4 is the method for cleaning the strainer portion of the well according to claim 1 or 2, wherein the well (1) is subjected to pressurized water supply to the inside of the well (1). This is a method of doing this via a pressurized water supply pipe (13) attached to a pressurized water supply pipe port (3a) provided on the side surface of the casing (3) forming the above.

本願発明に係る井戸のストレーナ部の洗浄方法は、前記の通りの構成であるから、以下のような効果を奏することができる。 Since the method for cleaning the strainer portion of the well according to the present invention has the above-mentioned configuration, the following effects can be obtained.

まず、請求項1に記載した井戸のストレーナ部の洗浄方法は、前記のように、井戸(1)の内部への加圧送水の実施とその休止を交互に複数回繰り返すものであるところ、加圧送水の実施によりストレーナ部(S)が膨張するのに対し、加圧送水の休止によりストレーナ部(S)が収縮することになる。このようにストレーナ部(S)が膨張と収縮を繰り返すことにより、ストレーナ部(S)の付着物が剥がれ易くなるとともに、剥がれ易くなったストレーナ部(S)の付着物は井戸(1)の内部に圧入された水がストレーナ部(S)の内側から外側へと圧出されることで十分に除去されるのである。よって、請求項1に記載した井戸のストレーナ部の洗浄方法は、井戸の内部に加圧送水することでストレーナ部の付着物を除去するための井戸のストレーナ部の洗浄方法につき、ストレーナ部の付着物を十分に除去することができる方法を提供するという本願発明が解決しようとする第1の課題を解決することができる。 First, the method for cleaning the strainer portion of the well according to claim 1 is to alternately repeat the execution of pressurized water supply to the inside of the well (1) and its suspension a plurality of times, as described above. The strainer portion (S) expands due to the implementation of the pressurized water supply, whereas the strainer portion (S) contracts due to the suspension of the pressurized water supply. As the strainer portion (S) repeats expansion and contraction in this way, the deposits on the strainer portion (S) are easily peeled off, and the deposits on the strainer portion (S) that are easily peeled off are inside the well (1). The water pressed into the strainer portion (S) is sufficiently removed by being pushed out from the inside to the outside of the strainer portion (S). Therefore, the method for cleaning the strainer portion of the well according to claim 1 is the method for cleaning the strainer portion of the well for removing the deposits on the strainer portion by supplying pressurized water to the inside of the well, and the strainer portion is attached. The first problem to be solved by the present invention of providing a method capable of sufficiently removing a kimono can be solved.

また、請求項1に記載した井戸のストレーナ部の洗浄方法は、上記のように、ストレーナ部(S)が膨張と収縮を繰り返すことにより、ストレーナ部(S)の付着物が剥がれ易くなるから、それほど圧力を高めて加圧送水する必要はないため、井戸(1)の関連機器を井戸(1)の内部に設置したままにしておいても、加圧送水により損傷するおそれは低減している。よって、請求項1に記載した井戸のストレーナ部の洗浄方法は、井戸の内部に加圧送水することでストレーナ部の付着物を除去するための井戸のストレーナ部の洗浄方法につき、該井戸の内部に設置されている関連機器を設置したままにして該井戸の内部に加圧送水を行ってストレーナ部の付着物を除去する方法を提供するという本願発明が解決しようとする第2の課題を解決することができる。 Further, in the method for cleaning the strainer portion of the well according to claim 1, as described above, the strainer portion (S) repeatedly expands and contracts, so that the deposits on the strainer portion (S) are easily peeled off. Since it is not necessary to increase the pressure so much to supply pressurized water, the risk of damage due to pressurized water is reduced even if the equipment related to the well (1) is left installed inside the well (1). .. Therefore, the method for cleaning the strainer portion of the well according to claim 1 is the method for cleaning the strainer portion of the well for removing the deposits on the strainer portion by supplying pressurized water to the inside of the well. The second problem to be solved by the present invention of providing a method of providing a method of removing deposits on the strainer portion by performing pressurized water supply to the inside of the well while keeping the related equipment installed in the well installed is solved. can do.

特に、本願発明の発明者が本願発明に係る井戸のストレーナ部の洗浄方法を実施して得た知見によれば、前記加圧送水の圧力は加圧送水装置(15)において2kgf/cm2以上であって10kgf/cm2以下であり、前記加圧送水を実施する時間は1回につき5分間であり、前記加圧送水を休止する時間は1回につき2ないし3分間であり、該加圧送水の実施と休止を交互に2ないし3回繰り返すことにより、ストレーナ部(S)の付着物を十分に除去し得るとともに、井戸(1)の内部に設置してある機器に故障は生じなかった。よって、請求項2に記載した井戸のストレーナ部の洗浄方法は、本願発明が解決しようとする第1及び第2の課題を解決するのに好適である。 In particular, according to the findings obtained by the inventor of the present invention performing the method for cleaning the strainer portion of the well according to the present invention, the pressure of the pressurized water supply is 2 kgf / cm 2 or more in the pressurized water supply device (15). It is 10 kgf / cm 2 or less, the time for carrying out the pressurized water supply is 5 minutes at a time, and the time for suspending the pressurized water supply is 2 to 3 minutes at a time, and the pressurized water supply is performed. By alternately repeating the watering and the suspension two or three times, the deposits on the strainer portion (S) could be sufficiently removed, and the equipment installed inside the well (1) did not malfunction. .. Therefore, the method for cleaning the strainer portion of the well according to claim 2 is suitable for solving the first and second problems to be solved by the present invention.

また、井戸(1)の内部への加圧送水につき、井戸の開口部用蓋部材(12)に設けられている加圧送水管口(12a)に取り付けた加圧送水管(13)を介してこれを行う方法、およびケーシング(3)の側面に設けられている加圧送水管口(3a)に取り付けた加圧送水管(13)を介してこれを行う方法によれば、簡便に井戸のストレーナ部を洗浄することができることから、請求項3又は4に記載した井戸のストレーナ部の洗浄方法は、本願発明が解決しようとする第1及び第2の課題を解決するのに好適である。 Further, the pressurized water is supplied to the inside of the well (1) via the pressurized water pipe (13) attached to the pressurized water pipe port (12a) provided in the lid member (12) for the opening of the well. According to the method of performing this via the pressurized water pipe (13) attached to the pressurized water pipe port (3a) provided on the side surface of the casing (3), the strainer portion of the well can be easily provided. Since it can be cleaned, the method for cleaning the strainer portion of the well according to claim 3 or 4 is suitable for solving the first and second problems to be solved by the present invention.

本願発明に係る井戸のストレーナ部の洗浄方法の一実施形態を示した概略構造図である。It is a schematic structural drawing which showed one Embodiment of the cleaning method of the strainer part of the well which concerns on this invention. 図1に記載した本願発明の一実施形態に係る井戸のストレーナ部の洗浄方法の作用効果説明図である。FIG. 1 is an explanatory diagram of the action and effect of the method for cleaning the strainer portion of the well according to the embodiment of the present invention described in FIG. 図1に記載した本願発明の一実施形態に係る井戸のストレーナ部の洗浄方法に用いる井戸の開口部用蓋部材の斜視図である。FIG. 3 is a perspective view of a well opening lid member used in the method for cleaning a well strainer portion according to an embodiment of the present invention described in FIG. 1. 図1とは異なる実施形態に係る本願発明に係る井戸のストレーナ部の洗浄方法を示した概略構造図である。It is a schematic structural drawing which showed the cleaning method of the strainer part of the well which concerns on this invention which concerns on embodiment different from FIG. 図4に記載した本願発明の一実施形態に係る井戸のストレーナ部の洗浄方法に用いる井戸の開口部用蓋部材の斜視図である。FIG. 4 is a perspective view of a well opening lid member used in the method for cleaning a well strainer portion according to an embodiment of the present invention described in FIG. 一般的な井戸の構造を示した概略構造図である。It is a schematic structure diagram which showed the structure of a general well.

以下、本願発明の一実施形態に係る井戸のストレーナ部の付着物を除去する方法につき、添付図面に基づいて、これを説明する。 Hereinafter, a method for removing deposits on the strainer portion of a well according to an embodiment of the present invention will be described with reference to the accompanying drawings.

本願発明に係る井戸のストレーナ部の付着物を除去する方法を実施する井戸(1)は、一般に、図1に図示するように、試錐工事で掘削した井戸穴(2)の内部にそれぞれ管状のケーシング(3)及びストレーナ(4)が設置されているとともに、井戸穴(2)の内壁とケーシング(3)及びストレーナ(4)の外壁との間には砂利(5)が詰められている。ケーシング(3)ないしストレーナ(4)の外周面には井戸用ネット(6)を被せることもある。そして、井戸(1)の内部には揚水ポンプ(8)が設置されているとともに、揚水ポンプ(8)に揚水管(9)が連結されている。また、揚水管(9)には揚水バルブ(10)が装着されており、揚水量の調節を行うことができるようになっている。更に、井戸の開口部(7)は井戸用カバー(11)で覆われることがある。もっとも、本願発明に係る井戸のストレーナ部の付着物を除去する方法は、上記のような一般的な井戸に限らず、ストレーナ部(S)を備えている井戸であればこれを実施することができる。 The well (1) for carrying out the method for removing the deposits on the strainer portion of the well according to the present invention is generally tubular inside the well hole (2) excavated by the drilling work as shown in FIG. A casing (3) and a strainer (4) are installed, and gravel (5) is packed between the inner wall of the well hole (2) and the outer wall of the casing (3) and the strainer (4). A well net (6) may be placed on the outer peripheral surface of the casing (3) or the strainer (4). A pump (8) is installed inside the well (1), and a pump pipe (9) is connected to the pump (8). Further, a pumping valve (10) is attached to the pumping pipe (9) so that the amount of pumped water can be adjusted. Further, the well opening (7) may be covered with a well cover (11). However, the method for removing the deposits on the strainer portion of the well according to the present invention is not limited to the general well as described above, and any well provided with the strainer portion (S) can be implemented. can.

井戸(1)を設ける場所やストレーナ部(S)が位置する深さの地質等により多少の差異はあるものの、特にストレーナ(4)の取水孔や井戸用ネット(6)に砂、泥、微生物といった各種の物質が付着してしまう。そうすると、該付着物によって該取水孔が閉塞したり井戸用ネット(6)が目詰まりしたりして、地下水がストレーナ部(S)の内部に流入しなくなる結果、井戸(1)の揚水量が減少したりひいては皆無になったりしてしまうという問題が生じる。そこで、このような問題を解消ないし予防すべく、本願発明に係る井戸のストレーナ部の洗浄方法を実施するのである。 Although there are some differences depending on the location where the well (1) is installed and the geology of the depth where the strainer portion (S) is located, sand, mud, and microorganisms are found in the intake hole of the strainer (4) and the well net (6). Various substances such as are attached. Then, the intake hole is blocked or the well net (6) is clogged by the deposit, and the groundwater does not flow into the strainer portion (S). As a result, the amount of pumped water in the well (1) increases. The problem arises that it decreases or even disappears. Therefore, in order to solve or prevent such a problem, the method for cleaning the strainer portion of the well according to the present invention is carried out.

本願発明に係る井戸のストレーナ部の洗浄方法は、井戸(1)の内部に加圧送水することで、井戸(1)の内部に圧入された水がストレーナ部(S)の内側から外側へと圧出されてストレーナ部(S)の付着物を除去する方法であって、井戸(1)の内部にその関連機器を設置したままの状態で、これを実施することができるものである。 The method for cleaning the strainer portion of the well according to the present invention is to pressurize and send water into the well (1) so that the water pressed into the well (1) is transferred from the inside to the outside of the strainer portion (S). It is a method of extruding and removing the deposits of the strainer portion (S), and this can be carried out with the related equipment installed inside the well (1).

まず、図1に図示するように、井戸の開口部用蓋部材(12)で井戸の開口部(7)を閉鎖する。井戸の開口部用蓋部材(12)は、井戸の開口部(7)を閉鎖し得る形状及び大きさを備えている。即ち、図3では、井戸の開口部用蓋部材(12)はその全体的な形状が平面視正円状の平板であるが、井戸の開口部(7)の形状に合わせて、その形状を適宜変更することができる。井戸の開口部用蓋部材(12)はその材質を問わないが、井戸(1)は水気の多い場所であるから、そのような場所であっても容易に錆びることがなく、また、井戸(1)の内部に加圧送水を行っても容易に損傷することがない程度の強度を備えたステンレスなどの材料で形成するのが好適である。 First, as shown in FIG. 1, the well opening (7) is closed by the well opening lid member (12). The well opening lid member (12) has a shape and size capable of closing the well opening (7). That is, in FIG. 3, the well opening lid member (12) is a flat plate whose overall shape is a circular plate in a plan view, but its shape is adjusted to match the shape of the well opening (7). It can be changed as appropriate. The material of the lid member (12) for the opening of the well does not matter, but since the well (1) is a place with a lot of water, it does not easily rust even in such a place, and the well (1) It is preferable to use a material such as stainless steel having a strength that does not easily damage the inside of 1) even if pressurized water is sent.

井戸の開口部用蓋部材(12)には、加圧送水管(13)を取り付けるための加圧送水管口(12a)が設けられている。即ち、図3では、井戸の開口部用蓋部材(12)に上方に伸びる管状の部位を設けるとともに、その上端部に加圧送水管(13)を螺着するためのネジ部を設けることにより、加圧送水管口(12a)を形成している。また、井戸の開口部用蓋部材(12)には、井戸(1)の内部から地下水を揚水するための揚水管(9)を取り付けるための揚水管口(12b)が設けられている。即ち、図3では、井戸の開口部用蓋部材(12)に上方と下方にそれぞれ伸びる管状の部位を設けるとともに、その内部に揚水管(9)を螺着するためのネジ部を設けることにより、揚水管口(12b)を形成している。もっとも、加圧送水管口(12a)と揚水管口(12b)は、それぞれ加圧送水管(13)と揚水管(9)とを取り付けることができれば、このような態様に限定されるものではない。 The lid member (12) for the opening of the well is provided with a pressurized water pipe port (12a) for attaching the pressurized water pipe (13). That is, in FIG. 3, a tubular portion extending upward is provided on the lid member (12) for the opening of the well, and a screw portion for screwing the pressurized water pipe (13) is provided on the upper end thereof. A pressurized water pipe port (12a) is formed. Further, the lid member (12) for the opening of the well is provided with a pumping pipe port (12b) for attaching a pumping pipe (9) for pumping groundwater from the inside of the well (1). That is, in FIG. 3, a tubular portion extending upward and downward is provided on the lid member (12) for the opening of the well, and a screw portion for screwing the pumping pipe (9) is provided inside the tubular portion. , A pumping pipe port (12b) is formed. However, the pressurized water pipe port (12a) and the pumping pipe port (12b) are not limited to such an embodiment as long as the pressurized water pipe (13) and the pumping pipe (9) can be attached, respectively.

図1では、井戸の開口部(7)に鍔付きの配管接手(14)を設置した上で、井戸の開口部用蓋部材(12)を複数のボルトで配管接手(14)に螺着させているが、井戸の開口部用蓋部材(12)を井戸の開口部(7)に設置する手段は、特にこれに限定されるものではない。また、井戸の開口部用蓋部材(12)は、本願発明に係る井戸のストレーナ部の洗浄方法を実施する際にその都度井戸の開口部(7)に着脱してもよいが、井戸の開口部(7)に常時設置しておいてもよい。尚、井戸の開口部用蓋部材(12)を井戸の開口部(7)に常時設置しておく場合、揚水管(9)は揚水管口(12b)に常時取り付けておくことができる。また、本願発明に係る井戸のストレーナ部の洗浄方法を実施するとき以外は、加圧送水管口(13)は各種の栓部材で閉塞しておくのがよい。 In FIG. 1, after installing a pipe joint (14) with a flange at the opening (7) of the well, the lid member (12) for the opening of the well is screwed to the pipe joint (14) with a plurality of bolts. However, the means for installing the lid member (12) for the opening of the well in the opening (7) of the well is not particularly limited to this. Further, the lid member (12) for the opening of the well may be attached to and detached from the opening (7) of the well each time the method for cleaning the strainer portion of the well according to the present invention is carried out. It may be installed in the section (7) at all times. When the lid member (12) for the opening of the well is always installed in the opening (7) of the well, the pumping pipe (9) can be always attached to the opening of the pumping pipe (12b). Further, except when the method for cleaning the strainer portion of the well according to the present invention is carried out, it is preferable to close the pressurized water pipe port (13) with various plug members.

井戸の開口部用蓋部材(12)を用いることで、井戸の開口部(7)を閉鎖して加圧送水が井戸の開口部(7)から溢れ出ないようにし、井戸(1)の内部の圧力を高めることができるため、本願発明に係る井戸のストレーナ部の洗浄方法を好適に実施することができる。また、加圧送水管口(12a)に加圧送水管(13)を取り付けることにより、本願発明に係る井戸のストレーナ部の洗浄方法を簡便に実施することができ、好適である。 By using the lid member (12) for the opening of the well, the opening (7) of the well is closed to prevent the pressurized water supply from overflowing from the opening (7) of the well, and the inside of the well (1). Since the pressure of the well can be increased, the method for cleaning the strainer portion of the well according to the present invention can be preferably carried out. Further, by attaching the pressurized water pipe (13) to the pressurized water pipe port (12a), the method for cleaning the strainer portion of the well according to the present invention can be easily carried out, which is preferable.

次に、図1に図示するように、加圧送水管口(12a)に加圧送水管(13)を取り付ける。具体的には、加圧送水管(13)の端部を加圧送水管口(12a)の上端部に螺着する。また、揚水管(9)に接続している揚水バルブ(10)は、井戸(1)の内部の地下水を減少させることがないよう、また、加圧送水の圧力を減ずることがないよう、これを閉鎖して井戸(1)からの揚水を停止しておく。そして、加圧送水管(13)を介して地上から井戸(1)の内部への加圧送水の実施とその休止を交互に複数回繰り返す。具体的には、加圧送水管に接続した加圧送水装置(15)を操作することによって、加圧送水の実施とその休止を行うのである。ここで、加圧送水装置(15)としては、各種公知の送水用エンジンポンプを用いることができる。 Next, as shown in FIG. 1, the pressurized water pipe (13) is attached to the pressurized water pipe port (12a). Specifically, the end of the pressurized water pipe (13) is screwed to the upper end of the pressurized water pipe port (12a). Further, the pumping valve (10) connected to the pumping pipe (9) does not reduce the groundwater inside the well (1) and does not reduce the pressure of the pressurized water supply. Is closed and pumping from the well (1) is stopped. Then, the pressure water supply from the ground to the inside of the well (1) via the pressure water pipe (13) and the suspension thereof are alternately repeated a plurality of times. Specifically, by operating the pressurized water supply device (15) connected to the pressurized water pipe, the pressurized water supply is carried out and its suspension is performed. Here, as the pressurized water supply device (15), various known water supply engine pumps can be used.

そうすると、図2に図示するように、加圧送水の実施によりストレーナ部(S)が膨張するのに対し、加圧送水の休止によりストレーナ部(S)が収縮することになる。ストレーナ部(S)がこのような膨張と収縮を繰り返すことにより、ストレーナ部(S)の付着物が剥がれ易くなるとともに、剥がれ易くなった該ストレーナ部の付着物は井戸の内部に圧入された水がストレーナ部(S)の内側から外側へと圧出されることで十分に除去される。また、ストレーナ部(S)が膨張と収縮を繰り返すことにより、ストレーナ部の付着物が剥がれ易くなるから、それほど圧力を高めて加圧送水する必要はないため、揚水ポンプ(8)といった井戸の関連機器を井戸(1)の内部に設置したままにしておいても、加圧送水により損傷するおそれが低減されている。 Then, as shown in FIG. 2, the strainer portion (S) expands due to the implementation of the pressurized water supply, whereas the strainer portion (S) contracts due to the suspension of the pressurized water supply. By repeating such expansion and contraction of the strainer portion (S), the deposits on the strainer portion (S) are easily peeled off, and the deposits on the strainer portion that are easily peeled off are the water pressed into the well. Is sufficiently removed by being extruded from the inside to the outside of the strainer portion (S). Further, since the strainer portion (S) repeatedly expands and contracts, the deposits on the strainer portion are easily peeled off, so that it is not necessary to increase the pressure so much to supply pressurized water. Even if the equipment is left installed inside the well (1), the risk of damage due to pressurized water supply is reduced.

特に、本願発明の発明者が本願発明に係る井戸のストレーナ部の洗浄方法を実施して得た知見によれば、前記加圧送水の圧力は加圧送水装置(15)において2kgf/cm2以上であって10kgf/cm2以下であり、前記加圧送水を実施する時間は1回につき5分間であり、前記加圧送水を休止する時間は1回につき2ないし3分間であり、該加圧送水の実施と休止を交互に2ないし3回繰り返すことにより、ストレーナ部(S)の付着物を十分に除去し得るとともに、井戸(1)の内部に設置してある機器に故障は生じなかった。 In particular, according to the findings obtained by the inventor of the present invention performing the method for cleaning the strainer portion of the well according to the present invention, the pressure of the pressurized water supply is 2 kgf / cm 2 or more in the pressurized water supply device (15). It is 10 kgf / cm 2 or less, the time for carrying out the pressurized water supply is 5 minutes at a time, and the time for suspending the pressurized water supply is 2 to 3 minutes at a time, and the pressurized water supply is performed. By alternately repeating the watering and the suspension two or three times, the deposits on the strainer portion (S) could be sufficiently removed, and the equipment installed inside the well (1) did not malfunction. ..

上記のようにしてストレーナ部(S)を洗浄した後、加圧送水口(12a)から加圧送水管(13)を取り外すとともに、加圧送水管(13)に接続した加圧送水装置(15)の撤去などを行う。また、揚水管(9)に接続している揚水バルブ(10)を開いて、井戸(1)からの揚水を再開する。 After cleaning the strainer portion (S) as described above, the pressurized water pipe (13) is removed from the pressurized water pipe (12a), and the pressurized water pipe (15) connected to the pressurized water pipe (13) is removed. And so on. Further, the pumping valve (10) connected to the pumping pipe (9) is opened to restart pumping from the well (1).

以上が本願発明の一実施形態に係る井戸のストレーナ部の付着物を除去する方法についての説明である。以下に本願発明の別の実施形態に係る井戸のストレーナ部の付着物を除去する方法について説明する。尚、本願発明の別の実施形態に係る井戸のストレーナ部の付着物を除去する方法は、下記の事項以外、前記の本願発明の一実施形態に係る井戸のストレーナ部の付着物を除去する方法についての説明と同一である。 The above is the description of the method for removing the deposits on the strainer portion of the well according to the embodiment of the present invention. Hereinafter, a method for removing deposits on the strainer portion of the well according to another embodiment of the present invention will be described. The method for removing the deposits on the strainer portion of the well according to another embodiment of the present invention is a method for removing the deposits on the strainer portion of the well according to the above-described embodiment of the present invention, except for the following items. It is the same as the explanation about.

特に井戸の開口部(7)の面積が小さい場合、自ずから井戸の開口部用蓋部材(12)の大きさも小さくなるところ、このような場合は井戸の開口部用蓋部材(12)に加圧送水管口(12a)と揚水管口(12b)とを設けることが困難である。 In particular, when the area of the well opening (7) is small, the size of the well opening lid member (12) is naturally small. In such a case, pressure is fed to the well opening lid member (12). It is difficult to provide a water pipe port (12a) and a pumping pipe port (12b).

そこで、図4及び5に図示するように、井戸の開口部用蓋部材(12)には揚水管口(12b)のみを設けて、これを井戸の開口部(7)に設置する。一方、ケーシング(3)の地表面上に露出している部分の側面に加圧送水管口(3a)を設ける。具体的には、ケーシング(3)の側面に開口部を設けるとともに、管状の部材を水平方向に突設する。加圧送水管口(3a)に加圧送水管(13)を接続し、これを介して井戸(1)の内部に加圧送水を行うのである。 Therefore, as shown in FIGS. 4 and 5, only the pumping pipe port (12b) is provided in the lid member (12) for the opening of the well, and this is installed in the opening (7) of the well. On the other hand, a pressurized water pipe port (3a) is provided on the side surface of the portion of the casing (3) exposed on the ground surface. Specifically, an opening is provided on the side surface of the casing (3), and a tubular member is projected in the horizontal direction. A pressurized water pipe (13) is connected to the pressurized water pipe port (3a), and pressurized water is supplied to the inside of the well (1) via the pressurized water pipe (13).

1 井戸
2 井戸穴
3 ケーシング
3a 加圧送水管口
4 ストレーナ
5 砂利
6 井戸用ネット
7 開口部
8 揚水ポンプ
9 揚水管
10 揚水バルブ
11 井戸用カバー
12 開口部用蓋部材
12a 加圧送水管口
12b 揚水管口
13 加圧送水管
14 配管接手
15 加圧送水装置
S ストレーナ部
1 Well 2 Well hole 3 Casing 3a Pressurized water pipe port 4 Strainer 5 Grain 6 Well net 7 Opening 8 Pumping pump 9 Pumping pipe 10 Pumping valve 11 Well cover 12 Opening lid member 12a Pressurized water pipe port 12b Pumping pipe Port 13 Pressurized water supply pipe 14 Piping joint 15 Pressurized water supply device S Strainer

Claims (4)

井戸の内部に加圧送水することで、該井戸の内部に圧入された水がストレーナ部の内側から外側へと圧出されて該井戸に設置されているストレーナ部の付着物を除去する方法であって、該井戸の内部にその関連機器を設置したままの状態で、井戸の開口部用蓋部材で該井戸の開口部を閉鎖し、該井戸からの揚水を停止した上で、該井戸の内部への加圧送水の実施とその休止を交互に複数回繰り返して該ストレーナ部の付着物を除去することを特徴とする井戸のストレーナ部の洗浄方法。 By pressurized water supply to the inside of the well, the water pressed into the well is pushed out from the inside to the outside of the strainer part, and the deposits on the strainer part installed in the well are removed. Therefore, with the related equipment installed inside the well, the opening of the well is closed with the lid member for the opening of the well, the water pumping from the well is stopped, and then the well A method for cleaning a well strainer portion, which comprises repeatedly performing pressurized water supply to the inside and pausing the pressure alternately a plurality of times to remove deposits on the strainer portion. 請求項1に記載した井戸のストレーナ部の洗浄方法であって、前記井戸の内部への加圧送水の圧力を加圧送水装置において2kgf/cm2以上であって10kgf/cm2以下とし、該加圧送水を実施する時間を1回につき5分間とし、該加圧送水を休止する時間を1回につき2ないし3分間とし、該加圧送水の実施と休止を交互に2ないし3回繰り返すことを特徴とする井戸のストレーナ部の洗浄方法。 The method for cleaning the strainer portion of a well according to claim 1, wherein the pressure of the pressurized water supply to the inside of the well is 2 kgf / cm 2 or more and 10 kgf / cm 2 or less in the pressurized water supply device. The time to carry out the pressurized water supply is 5 minutes at a time, the time to suspend the pressurized water supply is 2 to 3 minutes at a time, and the execution and suspension of the pressurized water supply are alternately repeated 2 to 3 times. A method of cleaning the strainer part of a well, which is characterized by. 請求項1又は2に記載した井戸のストレーナ部の洗浄方法であって、前記井戸の内部への加圧送水につき、前記井戸の開口部用蓋部材に設けられている加圧送水管口に取り付けた加圧送水管を介してこれを行うことを特徴とする井戸のストレーナ部の洗浄方法。 The method for cleaning the strainer portion of a well according to claim 1 or 2, wherein the pressurized water supply to the inside of the well is attached to a pressurized water pipe opening provided in a lid member for an opening of the well. A method of cleaning the strainer portion of a well, characterized in that this is done via a pressurized water pipe. 請求項1又は2に記載した井戸のストレーナ部の洗浄方法であって、前記井戸の内部への加圧送水につき、該井戸を形成するケーシングの側面に設けられている加圧送水管口に取り付けた加圧送水管を介してこれを行うことを特徴とする井戸のストレーナ部の洗浄方法。 The method for cleaning the strainer portion of a well according to claim 1 or 2, wherein the pressurized water supply to the inside of the well is attached to a pressurized water pipe port provided on a side surface of a casing forming the well. A method of cleaning the strainer portion of a well, characterized in that this is done via a pressurized water pipe.
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JP2001193106A (en) 2000-01-14 2001-07-17 Tomoaki Oura Method for cleaning screen in deep well pipe
JP2004501303A (en) 2000-06-20 2004-01-15 サブサーフェイス テクノロジーズ インコーポレイテッド Method and apparatus for well maintenance

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021514035A (en) * 2018-02-20 2021-06-03 サブサーフェイス テクノロジーズ インコーポレイテッド Well repair method

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