JP4510922B1 - How to clean buried sewage pipes - Google Patents

How to clean buried sewage pipes Download PDF

Info

Publication number
JP4510922B1
JP4510922B1 JP2009199391A JP2009199391A JP4510922B1 JP 4510922 B1 JP4510922 B1 JP 4510922B1 JP 2009199391 A JP2009199391 A JP 2009199391A JP 2009199391 A JP2009199391 A JP 2009199391A JP 4510922 B1 JP4510922 B1 JP 4510922B1
Authority
JP
Japan
Prior art keywords
cleaning
sewage
sediment
manhole
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2009199391A
Other languages
Japanese (ja)
Other versions
JP2011052376A (en
Inventor
民夫 山岸
博 阿部
Original Assignee
民夫 山岸
有限会社タム・テック
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 民夫 山岸, 有限会社タム・テック filed Critical 民夫 山岸
Priority to JP2009199391A priority Critical patent/JP4510922B1/en
Application granted granted Critical
Publication of JP4510922B1 publication Critical patent/JP4510922B1/en
Publication of JP2011052376A publication Critical patent/JP2011052376A/en
Expired - Fee Related legal-status Critical Current

Links

Images

Abstract

【課題】環境条件に制約されずに経済的に清掃作業を進めることができる下水用埋設管の清掃方法を提供する。
【解決手段】上流側マンホール1と下流側マンホール2とこれらを連通する埋設下水管1bとの内部を清掃するに当たり、該下流側マンホール2内の沈積物及び付着物を浚渫揚水装置により混合泥水として地上の沈積物分別泥水槽4に排送する第1工程と、該上流側マンホール1内の沈積物及び付着物を該浚渫揚水装置により混合泥水として地上の該沈積物分別泥水槽4に排送する第2工程とを、順次に実施すると同時に、該沈積物分別泥水槽4で分離された回収泥水の少なくとも一部を該上流側マンホール1内に送入し、且つ該沈積物分別泥水槽4で分離された回収沈積物を処理場に移送する処分工程を実施し、次いで該埋設下水管1b内の残物を移動可能な内壁清掃装置により清掃して該下流側マンホール2内に流下させる第3工程とからなる。
【選択図】図1
The present invention provides a method for cleaning an embedded pipe for sewage that can economically proceed with a cleaning operation without being restricted by environmental conditions.
When cleaning the inside of an upstream manhole 1, a downstream manhole 2, and an embedded sewage pipe 1b that communicates these, the sediment and deposits in the downstream manhole 2 are mixed as mud by a dredging device. The first step of discharging to the sediment deposit mud tank 4 on the ground, and the sediment and deposits in the upstream manhole 1 to the above sediment deposit mud tank 4 as mixed mud by the dredging device The second step is sequentially performed, and at the same time, at least a part of the recovered mud separated in the sediment separation mud tank 4 is fed into the upstream manhole 1 and the sediment classification mud tank 4 The disposal step of transferring the collected sediment separated in step 1 to the treatment plant is performed, and then the residue in the buried sewage pipe 1b is cleaned by a movable inner wall cleaning device to flow down into the downstream manhole 2. 3 processes It made.
[Selection] Figure 1

Description

本発明は、下水用埋設管、特に地下埋設管の内壁面に付着又は堆積した汚物等を除去して、通水機能を高能率で回復させることができる、清掃方法に関するものである。   The present invention relates to a cleaning method that can remove filth and the like attached to or deposited on the inner wall surface of a sewage burial pipe, particularly an underground burial pipe, and restore the water flow function with high efficiency.

都市には多くの人々が住み、種々の経済活動が行われており、そのような活動を支えるために、都市ガス、電力などのエネルギーの供給や、情報通信等のための種々の管路が道路などの地下に設けられており、更に上水道や下水道なども道路などの地下に埋設されていることが多い。ところで、下水道は都市における生活排水なども合流することが多く、土砂など含む雨水が流入することもあって、種々のゴミ等の廃棄物を含む汚水などが流入することも避けられないが、水質や流量の変動が大きい汚水を滞り無く送出する機能を備えることが必要とされている。   Many people live in the city, and various economic activities are carried out. In order to support such activities, supply of energy such as city gas and electric power, and various pipelines for information communication etc. It is installed underground such as roads, and water and sewers are often buried underground such as roads. By the way, sewage often joins domestic wastewater in the city, and rainwater including earth and sand flows in, and it is inevitable that sewage including waste such as various garbage flows in. In addition, it is necessary to have a function of sending out sewage with a large fluctuation in the flow rate without delay.

このような下水道においては、上流では平均流量が少ない割には管径が大きい枝管で構成されているが、下流となる程に平均流量が多くなるので、下水道の管径も次第に大きくなるよう構成され、保守管理のために作業員が立ち入って、清掃や補修等の作業を実施できるようになっているのが普通である。しかし、下水用枝管の埋設位置は一般的に浅いので、これに通水障害が発生しても大がかりな修理工事が必要となることは少ないが、水流の中断が殆どない集合管などでは、土砂や固形物等が詰まる通水障害が起こると、作業員が管路内に入って障害を除去する工事の他に、下水の迂回流路を設置するなどの付帯工事が必要となるので、修復工事の日程が長くなるほか工数も多くて工事費も嵩み、交通の障害や地域の環境を損ねるという問題もある。特に下水の幹線管路では河川や地下道等の下を潜る伏越構造が採用される場合が多く、流水で満たされた下水管の内壁に粘着物等の汚れ付着や、土砂等の堆積も起こり易いので、通水障害発生の要警戒地域とされている。   In such a sewer, the upstream is composed of a branch pipe having a large pipe diameter for a small average flow, but the average flow increases as it goes downstream, so that the pipe diameter of the sewer gradually increases. It is usually configured so that workers can enter for maintenance management and perform operations such as cleaning and repair. However, since the burial position of the sewage branch pipe is generally shallow, even if a water flow failure occurs, it is rarely necessary to perform extensive repair work, but in a collecting pipe where there is almost no interruption of the water flow, If a water flow failure that clogs earth and sand or solids occurs, ancillary work such as installing a detour channel for sewage is required in addition to the work for workers to enter the pipeline and remove the failure. In addition to the length of time required for restoration work, there are problems such as a large number of man-hours, high construction costs, obstacles to traffic and damage to the local environment. In particular, in the main pipelines of sewage, there are many cases where a subsidence structure that is under the river or underpass is adopted, and dirt adheres to the inner wall of the sewage pipe filled with running water, and accumulation of earth and sand also occurs. Because it is easy, it is regarded as a critical area for the occurrence of water traffic problems.

そこで、上記のような下水管内に残留又は付着している汚物などを除去する方法として、下水管内に球状体を入れ、下水の流出方向とは反対方向に該球状体を強制移動させて、下水管を洗浄する次記のような方法が提案されている。しかし、このようにして下水管内から分離された汚物などが流下すると、下流側のマンホール等の中に堆積し易いので、下水管の洗浄を中断してマンホール内の堆積物などを掘り出す必要があるが、井戸の底を掘削する機械など利用しても、マンホールを傷つけずに清掃することは容易でなく、人力による清掃作業を採用することも、下水管清掃作業の効率化を妨げている原因の一つとなっている。   Therefore, as a method of removing the filth remaining or adhering to the sewage pipe as described above, a sphere is put in the sewage pipe, and the sphere is forced to move in a direction opposite to the sewage outflow direction. The following methods for cleaning the water pipe have been proposed. However, if the filth separated from the sewage pipe flows down in this way, it easily accumulates in the manhole etc. on the downstream side, so it is necessary to interrupt the washing of the sewage pipe and dig out the sediment etc. in the manhole. However, even if a machine that excavates the bottom of a well is used, it is not easy to clean without damaging the manhole, and the adoption of manual cleaning work also hinders the efficiency of sewage pipe cleaning work. It has become one of the.

特開平10-131278号公報Japanese Patent Laid-Open No. 10-131278

上述のように、下水道の管路に残留又は付着している汚物などを除去するに当たっては、下水の流量が清掃作業が可能な限界を超えた場合には、堆積物などの掘削も容易でなくなるほか、流量が極端に減少すると清掃用水が不足して作業が不可能となる場合がある。しかし、流水を貯留し易い伏越構造を有する下水管の場合には、降雨量の少ない時期の方が、むしろ清掃作業を進めやすいと言える。そこで本発明は、環境条件に制約されずに経済的かつ効率的に清掃作業を進めることができる、省資源、省力、且つ環境保護に適応した下水用埋設管の清掃方法を提供しようとするものである。   As described above, when removing sewage remaining or adhering to sewer pipes, excavation of sediments is not easy if the flow rate of sewage exceeds the limit that can be cleaned. In addition, when the flow rate is extremely reduced, there may be a case where the cleaning water is insufficient and the work cannot be performed. However, in the case of a sewage pipe having a cover-down structure that can easily store running water, it can be said that the cleaning work is easier to proceed when the amount of rainfall is low. Therefore, the present invention intends to provide a method for cleaning a buried pipe for sewage, which can proceed with a cleaning operation economically and efficiently without being restricted by environmental conditions, and is adapted for resource saving, labor saving and environmental protection. It is.

上記の目的を達成できる本発明の下水用埋設管の清掃方法は、上流側マンホールと下流側マンホールとこれらを連通する埋設下水管との内部を清掃するに当たり、該下流側マンホール内の沈積物及び付着物を浚渫揚水装置により混合泥水として地上の沈積物分別泥水槽に排送する第1工程と、該上流側マンホール内の沈積物及び付着物を該浚渫揚水装置により混合泥水として地上の該沈積物分別泥水槽に排送する第2工程とを、順次に実施すると同時に、該沈積物分別泥水槽で分離された回収泥水の少なくとも一部を該上流側マンホール内に送入し、且つ該沈積物分別泥水槽で分離された回収沈積物を処理場に移送する処分工程を実施し、次いで該埋設下水管内の残物を移動可能な内壁清掃装置により清掃して該下流側マンホール内に流下させる第3工程と、前記第1工程と、前記処分工程とを同時に実施するに際し、前記浚渫揚水装置として、浚渫用高揚程水中ポンプ装置と、該水中ポンプ装置の吐出水を作動流体とするジェット式吸引ポンプ装置とを組み合わせて構成した揚水装置を、懸垂使用することを要旨とする。 The method for cleaning a buried pipe for sewage according to the present invention that can achieve the above object is to clean the inside of an upstream manhole, a downstream manhole, and a buried sewage pipe that communicates them, and deposits in the downstream manhole, The first step of discharging the deposit as mixed mud by the dredging pump to the sediment depositing mud tank on the ground, and depositing the deposit and deposit in the upstream manhole as mixed mud by the kite pump The second step of discharging to the waste separation mud tank is sequentially performed, and at the same time, at least part of the recovered mud water separated in the sediment separation mud tank is sent into the upstream manhole, and the sedimentation is performed. Carry out a disposal process to transfer the collected sediment separated in the waste separation tank to the treatment plant, and then clean the residue in the buried sewage pipe with a movable inner wall cleaning device and let it flow into the downstream manhole. That a third step, said first step, when implementing the said disposition step at the same time, as the dredging pumping device, a jet of a submersible pump system as dredging for uplifting the discharge water working fluid in-water pump device The gist of the present invention is to suspend and use a pumping device configured in combination with a suction pump device .

前記本発明の下水用埋設管の清掃方法において、浚渫用高揚程水中ポンプ装置とジェット式吸引ポンプ装置とを組み合わせた前記浚渫揚水装置は、系内で簡単に移動使用ができる利点があるほか、前記沈積物分別泥水槽で分離された回収泥水の一部を、前記上流側マンホール、前記下流側マンホール、又は前記埋設下水管の洗浄用水として使用すると、清掃用水をより有効に利用することで、特にマンホール内の沈積物の浚渫除去作業などを、人力によらずに高能率で実施でき、工程管理が経済的に行える利点がある。 In the cleaning method of the buried pipe for sewage of the present invention, the dredging pump combined with a high-lift submersible pump device for dredging and a jet suction pump device has an advantage that it can be easily used in the system, By using a part of the recovered mud separated in the sediment separation mud tank as cleaning water for the upstream manhole, the downstream manhole, or the buried sewage pipe, the cleaning water can be used more effectively. In particular, there is an advantage that the process of removing sediments in the manhole can be carried out with high efficiency without depending on human power, and the process management can be performed economically.

本発明の下水用埋設管の清掃方法は、下水管内を流下する小流量の下水や滞留している下水を有効に利用するほか、下水管内を清掃する洗浄水を必要に応じて補充するだけで、下水用埋設管の内壁を容易に清掃することができ、更に、下水管路の接続地点等に設置されたマンホール内に沈積した汚物や土砂などを、容易に掘崩して除去することができるもので、作業者の労力を大幅に軽減できるうえ工期を短縮できる利点があるほか、施工時期の選定に制約が少ないという効果もあり、作業管理の経費ばかりでなく、作業地域の環境保全などの費用の節減にも格段の効果がある。   The method for cleaning a buried pipe for sewage according to the present invention not only effectively uses a small flow rate of sewage flowing down in the sewage pipe, but also staying sewage, and only replenishes the cleaning water for cleaning the sewage pipe as necessary. It is possible to easily clean the inner wall of the sewage buried pipe, and to easily dig up and remove the dirt and earth deposited in the manhole installed at the connection point of the sewage pipe. In addition to greatly reducing the labor of workers and shortening the construction period, there are also the effects that there are fewer restrictions on the selection of the construction period, not only the cost of work management, but also the environmental conservation of the work area etc. Cost savings are also very effective.

本発明の下水用埋設管の清掃方法の実施状況を表す概念図である。It is a conceptual diagram showing the implementation condition of the cleaning method of the buried pipe for sewage of this invention. 本発明の下水用埋設管の清掃に用いる装置の内、マンホール内の沈積物を泥水と混合して揚水するための、浚渫揚水装置の例の構成を示す説明図である。It is explanatory drawing which shows the structure of the example of a dredging pump for mixing the deposit in a manhole with muddy water among the apparatuses used for the cleaning of the buried pipe for sewage of this invention. 本発明の下水用埋設管の清掃に用いる装置の内、マンホール内の壁面を清掃するためのジェットノズル装置の例の構成を示す説明図である。It is explanatory drawing which shows the structure of the example of the jet nozzle apparatus for cleaning the wall surface in a manhole among the apparatuses used for cleaning of the buried pipe for sewage of this invention. 本発明の下水用埋設管の清掃に用いる装置の内、埋設下水管内を清掃する装置の例の構成を示す説明図である。It is explanatory drawing which shows the structure of the example of the apparatus which cleans the inside of a buried sewage pipe among the apparatuses used for the cleaning of the buried pipe for sewage of this invention.

以下、本発明の下水用埋設管の清掃方法と清掃の実施に使用される装置の例の構成とを、図に基づいて説明する。
図1において、1は下水管の中繼地点などに設けられている上流側マンホールであるが、この上流側マンホール1は、比較的に浅い地下に埋設されている上流側下水管1aから流入する下水を、河川や他の下水管等の埋設構造物などの下水道延長に障害となる構造体を回避して、一段と深い地下位置に埋設した伏越用の埋設下水管1bに導くための、流路切替用構造物である。そして2は、上記の埋設下水管1bから流入する下水を、埋設に支障がない地下に設けられた下流側下水管2aに導くための、流路切替用構造物として設けられている下流側マンホールである。
Hereinafter, the cleaning method of a buried pipe for sewage according to the present invention and the configuration of an example of an apparatus used for carrying out cleaning will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes an upstream manhole provided at a middle point of a sewage pipe. The upstream manhole 1 flows from an upstream sewage pipe 1a buried in a relatively shallow underground. The flow to guide the sewage to the underground sewage pipe 1b for underlay that is buried deeper underground, avoiding structures that obstruct the sewer extension such as rivers and other sewage pipes. This is a road switching structure. Reference numeral 2 denotes a downstream manhole provided as a flow path switching structure for guiding the sewage flowing from the buried sewage pipe 1b to the downstream sewage pipe 2a provided in the basement where there is no hindrance to the burial. It is.

都市の下水道において屡採用される伏越流路構造は、流入する下水の平時の流量は少なくても、下水管が充満した状態で使用されることが殆どであって、通常の流速は極めて遅いから、下水中に混在して流下する土砂や固形状の異物や油脂状の浮遊物などが、先ず上流側マンホール1の底に沈積するばかりでなく、その内壁面にも付着し、次いで埋設下水管1bの底部や天井部に沈積物や粘着物などとして蓄積され、更に下流側マンホール2の中や内壁にも沈積物などとして堆積するようになる。このような状態となると下水道の伏越構造部は下水の流下容量が次第に低下して、大雨などに際して下水が溢れ出す、或いは雨水と共に流入した異物等が下水管を閉塞して排水が不能となる、などの災害を引き起こす恐れがあるので、下水管の清掃とマンホールの沈積物除去とは、一体として処理することが必要となっている。   The underground passage structure adopted in the sewerage system of the city is mostly used in the state where the sewer pipe is full, even though the normal flow rate of the inflowing sewage is small, and the normal flow velocity is very slow. In addition, earth and sand, solid foreign matter, and oily and floating substances that flow down in the sewage are not only deposited on the bottom of the upstream manhole 1 but also attached to the inner wall surface, and then buried The water pipe 1b accumulates as deposits or adhesives at the bottom or ceiling, and further deposits as deposits or the like in the downstream manhole 2 or the inner wall. When this happens, the sewer structure of the sewer gradually reduces the flow capacity of the sewage, and the sewage overflows in the event of heavy rain, or foreign matter that flows in along with the rainwater blocks the sewage pipe, making drainage impossible. Therefore, cleaning of the sewer pipes and removal of manhole deposits must be performed as a unit.

そこで、このような問題点を抱える下水用埋設管は、マンホール内の沈積物の組成や沈積量を定期的に調査して、下水の流下障害が発生する前にマンホールや下水管内の沈積物や付着物などを清掃し、下水道としての機能を回復させておく必要があるので、本発明では、清掃が必要となった下水道設備の所在地に、可搬型の下水用埋設管の清掃装置を設置して効率的に清掃作業を実施し、清掃作業が終了すれば清掃装置を撤収して、清掃が必要な次の下水道設備の所在地に移動することができる、経済的な下水用埋設管の清掃装置を利用することが勧められる。   Therefore, sewage buried pipes that have such problems are regularly investigated for the composition and amount of sediment in the manhole, and before the sewage flow failure occurs, Since it is necessary to clean the deposits and restore the function as a sewerage system, in the present invention, a portable sewage underground pipe cleaning device is installed at the location of the sewerage system that needs to be cleaned. An economical cleaning device for buried pipes for sewage that can be efficiently cleaned and removed once the cleaning work is completed and moved to the next sewerage facility where cleaning is required. It is recommended to use

本発明の下水用埋設管の清掃方法によって、埋設管内の沈積物や付着物などを除去するに当たっては、先ず下流側マンホール2内の土砂等を含む泥状の沈積物2b1や油脂等の付着物2b2などを、浚渫揚水装置3によって滞留水と混合して泥状物化すると共に、地上に排送することによって除去し(第1工程)、次いで上流側マンホール1内の沈積物1b1や付着物1b2などを、上記の浚渫揚水装置3を利用して泥状物化し、地上に排送する第1工程と同様の方法か、又は泥状化物の一部を下流側マンホール2に向けて流下させると共に上記の第1工程の方法を併用する(第2工程)ようにしてもよい。   In order to remove the deposits and deposits in the buried pipe by the method for cleaning the buried pipe for sewage of the present invention, first, deposits such as mud deposit 2b1 including earth and sand in the downstream manhole 2 and deposits such as oil and fat 2b2 and the like are mixed with stagnant water by the dredging pump 3 to form a mud and removed by discharging to the ground (first step), and then the deposit 1b1 and deposit 1b2 in the upstream manhole 1 Or the like using the dredging and pumping device 3 described above, and the same method as the first step of discharging to the ground, or a part of the sludge flows down toward the downstream manhole 2 You may make it use together the method of said 1st process (2nd process).

上記のように、下流側マンホール2内の沈積物2b1や付着物2b2などを、滞留泥水と合わせて混合泥水30とし、排送処理するに用いられる浚渫揚水装置3は、例えば河底浚渫用の水中ポンプなどを利用することができるが、ポンプ機能を損なう恐れのある夾雑物、例えば布、網、帯状物などの混入物があると、ポンプの吸入口に設けた格子状濾板3a3などが覆われたときには、連続揚水が妨げられるから、濾板などを繰り返して掃除することが必要となる。   As described above, the dredged water device 3 used for discharging the sludge 2b1 and deposits 2b2 in the downstream manhole 2 together with the accumulated muddy water into the mixed muddy water 30 is used, for example, for riverbed dredging. Submersible pumps can be used, but if there are contaminants that may impair the pump function, such as cloth, nets, strips, etc., the lattice filter plate 3a3 provided at the pump suction port When covered, continuous pumping is hindered, so it is necessary to clean the filter plate repeatedly.

そこで掃除の頻度を少なくして作業能率を高めるために、上記の浚渫揚水装置3の別の例として、上記の河底浚渫用の水中ポンプ3aと別種の吸引ポンプ3bとを組み合わせた、別種の浚渫揚水装置3を提案し、図2にその使用状況を示した。この図では、内部に沈積物2b1が堆積してその上に下水が滞留している下流側マンホール2内に、フック3a2に掛けた吊り具3dで吊られた別例の浚渫揚水装置3を、その下端の濾板3a3部分が、下流側マンホール2内の沈積物2b1の表面位置近傍まで、吊り下ろされた状態にあり、吸引ポンプ3bの吸引管3b1先端に設けた籠型濾筒3b2が、濾板3a3より先に沈積物2b1を吸引できるように構成されていることを表している。   Therefore, in order to reduce the frequency of cleaning and increase the work efficiency, another example of the dredging pump 3 is a combination of the submersible pump 3a for the riverbed dredging and another suction pump 3b. Dredging water pumping device 3 was proposed, and its usage is shown in FIG. In this figure, another dredging pump 3 is hung by a hanging tool 3d hung on a hook 3a2 in a downstream manhole 2 in which sediment 2b1 is accumulated and sewage is accumulated. The filter plate 3a3 at the lower end is suspended to the vicinity of the surface position of the deposit 2b1 in the downstream manhole 2, and a vertical filter tube 3b2 provided at the tip of the suction tube 3b1 of the suction pump 3b is It shows that it is comprised so that the deposit 2b1 can be attracted | sucked ahead of the filter plate 3a3.

この例の浚渫揚水装置3は、河底浚渫用の水中ポンプ3aと、水ジェット式の吸引ポンプ3bとを組合せて構成されたもので、該水中ポンプ3aは、底部に格子状多孔濾板3a3を備えた吸入口を有し、頂部に口径100mmの吐出口3a1を上向きに設けた、高揚程の水中ポンプであり、該水中ポンプ3aの吐出口3a1の上には、口径25mmの噴出水絞りノズルと、該絞りノズルの噴出水の全てを受け入れる径45mmの送水管3cの開口端とを、真空発生用間隙を挟んで同軸となるように固定した長球形の吸引ポンプ3bが、上向きに連結されている。そして該吸引ポンプ3bの側面には、該水中ポンプ3aの底部近傍に先端が届く吸引管3b1が結合されていて、該水中ポンプ3aの吸入口より下方位置の沈積物2b1を、水中ポンプ3aより先に吸引できるようになっている。   The dredge pumping device 3 in this example is configured by combining a submarine pump 3a for riverbed dredging and a water jet suction pump 3b. The submersible pump 3a has a lattice-like porous filter plate 3a3 at the bottom. This is a high-lift submersible pump that has a suction port 3a1 with a diameter of 100mm at the top and has a suction port with a diameter of 25mm above the discharge port 3a1 of the submersible pump 3a. A long spherical suction pump 3b is connected upwardly, in which the nozzle and the open end of a water pipe 3c having a diameter of 45 mm for receiving all the water ejected from the throttle nozzle are fixed so as to be coaxial with the gap for vacuum generation. Has been. A suction pipe 3b1 having a tip reaching the bottom of the submersible pump 3a is coupled to the side surface of the submersible pump 3b, and the deposit 2b1 positioned below the suction port of the submersible pump 3a is transferred from the submersible pump 3a. It can be sucked first.

上記のように構成された浚渫揚水装置3は、水中ポンプ3aとして、高耐磨耗性の材料で製作された高揚程の市販品で、吸入口を覆う格子状濾板が、砂礫などは通過できるが布などは通過させない性能を備えたものであれば、好適に使用することができるが、本発明ではこの例に限られるものではなく、土砂等の沈積物と滞留下水とを同時に吸い込み、インペラなどで混合した泥水として吐出するという、本発明の目的に沿った装置であれば、適宜に選択して浚渫揚水装置3として利用することができる。そしてまた、水中ポンプ3aから吐出泥水を受け取った吸引ポンプ3bの絞りジェットノズルは、高圧の噴出泥水を送水管3cの開口に送り込むから、吸引ポンプ3b内に高真空の場を発生して、吸引管3b1から紐や布などを含む泥水を吸引し、高圧の噴出泥水と共に吸引泥水を送水管3c中に送り込んで、地上に設置された沈積物分別泥水槽4まで容易に送水できる性能を示すものである。   The dredge pumping device 3 configured as described above is a commercial product with a high head made of a highly wear-resistant material as a submersible pump 3a, and a grid-like filter plate covering the suction port passes gravel and the like. Although it can be suitably used as long as it has a performance that does not allow cloth to pass through, it is not limited to this example in the present invention, and a sediment such as earth and sand and stagnant sewage are sucked simultaneously, If it is an apparatus along the object of the present invention to discharge as muddy water mixed with an impeller or the like, it can be appropriately selected and used as the dredging pump 3. Further, the throttle jet nozzle of the suction pump 3b that has received the discharged muddy water from the submersible pump 3a sends the high-pressure muddy water into the opening of the water supply pipe 3c, so that a high-vacuum field is generated in the suction pump 3b. Able to suck muddy water including string and cloth from the pipe 3b1 and send the sucked muddy water into the water pipe 3c together with the high-pressure muddy water to easily feed water to the sediment separation mud tank 4 installed on the ground. It is.

本発明の下水用埋設管の清掃方法における第1工程では、下流側マンホール2内の沈積物2b1や付着物2b2などの混合泥水化と排送を前記の浚渫揚水装置3によって行うが、こうして沈積物分別泥水槽4に送入された混合泥水30は、先ず仕切壁41によって仕切られた沈降室42に入って固形物の沈降を待つことになる。沈降室42には、沈降した沈積物31が底に溜まるので、これを掬い上げて分別するための沈積物分離装置4aが設けてあり、掬い上げた沈積物31を積み込む容器を備えたトラックなどの搬送装置8によって、廃棄物処理場などに移送して処理する、処分工程が進められる。   In the first step of the method for cleaning a buried pipe for sewage according to the present invention, mixed dredging and discharging of the deposit 2b1 and deposit 2b2 in the downstream manhole 2 is performed by the dredging device 3 described above. The mixed mud water 30 sent into the material separation mud tank 4 first enters the settling chamber 42 partitioned by the partition wall 41 and waits for the solids to settle. The sedimentation chamber 42 is provided with a sediment separator 4a for collecting and separating the sediment 31 that has settled at the bottom, such as a truck equipped with a container for loading the sediment 31 that has been scooped up. The transfer device 8 advances the disposal process for transferring to a waste disposal site or the like for processing.

その一方で、沈降室42内で沈積物31を分別し、固形物の含有量が低下した上澄み液は、仕切壁41の他方にある泥水室43に移され、分別泥水32として、次の第2工程における、上流側マンホール1内の沈積物1b1や付着物1b2などの混合泥水化用水として、前記の浚渫揚水装置3による混合泥水30の調製と排送とに用いるほか、上流側マンホール1内壁の沈積物1b1や付着物1b2などや、埋設下水管1b内の沈積物1b1や付着物1b2などの清掃、或いは洗浄用水として再利用を待つことになり、最終的には前記の浚渫揚水装置3によって、混合泥水30として地上に排送されることとなる。   On the other hand, the supernatant liquid having separated the sediment 31 in the sedimentation chamber 42 and having a reduced solid content is transferred to the muddy water chamber 43 on the other side of the partition wall 41 to be separated muddy water 32. In addition to being used for the preparation and discharge of mixed mud water 30 by the above-mentioned dredging pump 3 as mixed mudification water such as sediment 1b1 and deposit 1b2 in the upstream manhole 1 in the two steps, the inner wall of the upstream manhole 1 The sediment 1b1 and deposit 1b2 and the sediment 1b1 and deposit 1b2 in the buried sewage pipe 1b will be cleaned or reused as cleaning water. As a result, the mixed mud water 30 is discharged to the ground.

こうして沈積物分別泥水槽4内に一時貯留されている混合泥水30は、土砂や固形物などが沈積物31として沈積物分別泥水槽4の底に溜まり、沈積物分離装置4aなどて分離されて廃棄物処理場に移送される処分工程が進む。そして沈積物分別泥水槽4に残った、固形物含有量の少ない分別泥水32は、泥水室43に貯留されるが、ここには送水ポンプ5に接続する給水管が給水弁44を介して設けられており、分別泥水32を送水ポンプ5に送ることができ、更に送水ポンプ5を運転すれば、耐圧管5aを経て圧力水50を供給でき、第2工程における上流側マンホール1内の沈積物や付着物などの泥状化処理用水、或いは上流側マンホール1内壁の洗浄用水などとして、循環再利用することができるようになっている。   In this way, the mixed mud water 30 temporarily stored in the sediment separation mud tank 4 is accumulated at the bottom of the sediment classification mud tank 4 as sediment 31 and separated by the sediment separator 4a and the like. The disposal process to be transferred to the waste disposal site proceeds. The fractionated muddy water 32 having a small solid content remaining in the sediment fractionated muddy tank 4 is stored in the muddy water chamber 43, where a water supply pipe connected to the water supply pump 5 is provided via a water supply valve 44. The separated muddy water 32 can be sent to the water pump 5, and if the water pump 5 is further operated, the pressure water 50 can be supplied through the pressure tube 5a, and the sediment in the upstream manhole 1 in the second step. It is possible to recycle and reuse as muddy treatment water such as water and deposits, or as cleaning water for the inner wall of the upstream manhole 1.

こうした上流側マンホール1内の沈積物などの処理に続いて、更に内壁面の清浄化が必要であれば、図3に例示される清掃ノズル装置6、即ち操作棒6a1の先端部に取り付けられて、複数のジェットノズルを放射状に設けた洗浄ヘッド6bと、該洗浄ヘッド6bを保護する複数の保護棒6a3と、該保護棒6a3の下端で支持された基台6a2とを備えた清掃ノズル装置6を、上流側マンホール1内に導入し、送水ポンプ5により供給された圧力水50をジェットノズルから噴射して、壁面などの洗浄を行うことができる。   If the inner wall surface needs to be further cleaned following the processing of the deposits in the upstream manhole 1, it is attached to the cleaning nozzle device 6 illustrated in FIG. 3, that is, the tip of the operation rod 6a1. The cleaning nozzle device 6 includes a cleaning head 6b provided with a plurality of jet nozzles radially, a plurality of protective rods 6a3 for protecting the cleaning head 6b, and a base 6a2 supported by the lower ends of the protective rods 6a3. Can be introduced into the upstream manhole 1 and the pressure water 50 supplied by the water pump 5 can be injected from the jet nozzle to clean the wall surface.

このようにして上流側マンホール1内に送り込まれた圧力水50は、埋設下水管1b内を流れて沈積物1b1や付着物1b2などの間を通り、形成されている泥状化物を伴いながら下流側マンホール2内に流下する結果、上流側マンホール1と、埋設下水管1bと、下流側マンホール2との中に、清掃作業を開始する前に貯留していた下水の大部分が、今度は分別泥水32を経て回収待ちの混合泥水30と略同等の状態となり、再び貯留されていると見ることができる。   The pressure water 50 thus fed into the upstream manhole 1 flows through the buried sewage pipe 1b, passes between the sediment 1b1 and the deposit 1b2, and the like, with the muddy material being formed downstream. As a result of flowing down into the side manhole 2, most of the sewage that was stored in the upstream manhole 1, the buried sewage pipe 1b, and the downstream manhole 2 before starting the cleaning operation is now separated. It becomes almost the same as the mixed muddy water 30 waiting for recovery through the muddy water 32 and can be seen to be stored again.

そこで次に、埋設下水管1b内に残っている泥状の沈積物1b1や付着物1b2を清掃除去する、第3工程に着手することになるが、埋設下水管1b内には、既に上流側マンホール1内の洗浄用として送り込まれた分別泥水32が、下流側マンホール1内まで流入しているので、該埋設下水管1b内に移動可能な内壁清掃装置7を導入する作業を進める。ここで採用する内壁清掃装置7としては、例えば図4に例示したような、特開平10-131278号公報(特許文献1)により公知な下水管の洗浄方法を、本発明に適した形態に変形して採用することができる。   Therefore, the third step of cleaning and removing the mud deposits 1b1 and deposits 1b2 remaining in the buried sewage pipe 1b will be started, but the buried sewage pipe 1b already has an upstream side. Since the separated muddy water 3 2 sent for cleaning in the manhole 1 flows into the downstream manhole 1, the operation of introducing the movable inner wall cleaning device 7 into the buried sewage pipe 1 b is advanced. As the inner wall cleaning device 7 employed here, for example, a well-known sewage pipe cleaning method disclosed in Japanese Patent Laid-Open No. 10-131278 (Patent Document 1) as illustrated in FIG. 4 is modified into a form suitable for the present invention. Can be adopted.

図4において、上流側マンホール1と下流側マンホール2との間に設けられている埋設下水管1bの底には、土砂等を含む泥状の沈積物1b1が堆積しており、又天井付近には、油脂等の付着物1b2などが粘着している。そこで埋設下水管1bの底に沈む重量を有する球体7aの前環7a1と後環7a2とに、それぞれ前牽引ワイヤ7b1と後牽引ワイヤ7b2と結び付けて、前牽引ワイヤ7b1と後牽引ワイヤ7b2との他方端を、それぞれ前方ウィンチ7c1と後方ウィンチ7c2とによって、球体7aを前方か又は後方に向かって引くことで、沈積物1b1の上層部分を掘り崩し、上流側から下流側へ向かう分別泥水32、又は混合泥水30の流れを利用して、沈積物1b1を下流側マンホール2内に流し入れる、という方法である。なお、図4における7d1、及び7d2は、埋設下水管1b内の泥状の沈積物1b1が腐敗して悪臭の発生が見られたときに用いる、1組の換気装置である。   In FIG. 4, a mud deposit 1b1 containing earth and sand is deposited on the bottom of the buried sewage pipe 1b provided between the upstream manhole 1 and the downstream manhole 2, and also near the ceiling. Is adhered to the deposit 1b2 such as oil or fat. Therefore, the front traction wire 7b1 and the rear traction wire 7b2 are connected to the front ring 7a1 and the rear ring 7a2 of the sphere 7a having a weight sinking to the bottom of the buried sewage pipe 1b, respectively, and the front traction wire 7b1 and the rear traction wire 7b2 are connected. Pulling the sphere 7a forward or backward by the front winch 7c1 and the rear winch 7c2 respectively at the other end, the upper layer portion of the deposit 1b1 is dug up, and the separated muddy water 32 from the upstream side toward the downstream side, Alternatively, the sediment 1b1 is poured into the downstream manhole 2 using the flow of the mixed mud water 30. In addition, 7d1 and 7d2 in FIG. 4 are a set of ventilators used when the mud deposit 1b1 in the buried sewage pipe 1b rots and the generation of malodor is observed.

上記のような埋設下水管1b内部を清掃する第3工程は、分別泥水32の流量を高めることと、沈積物1b1を掘り崩すに用いる球体の大きさと形状を、埋設下水管内の形状に合わせて選択すること、との2点に留意すれば、その作業効率が大幅に改善できるが、そのためには、下流側マンホール2内に流入する混合泥水30を、浚渫揚水装置3によって沈積物分別泥水槽4内に排送する第1工程と、沈積物分別泥水槽4に送入された混合泥水30を処理する処分工程とを、並行して同時に実施することが重要なのである。   The third step of cleaning the inside of the buried sewage pipe 1b as described above is to increase the flow rate of the separated mud water 32 and to match the size and shape of the sphere used to dig up the sediment 1b1 with the shape in the buried sewage pipe. If the two points are selected, the work efficiency can be greatly improved. For that purpose, the mixed mud water 30 flowing into the downstream manhole 2 is separated by the dredging pump 3 into the sludge separation mud tank. It is important that the first step of discharging into the waste water 4 and the disposal step of treating the mixed mud water 30 sent into the sediment separation mud tank 4 are simultaneously performed in parallel.

以上詳細に説明したように、本発明の下水用埋設管の清掃方法を実施して、上流側マンホールと下流側マンホールとこれらを連通する埋設下水管との内部の、堆積している沈積物や付着物などを浚渫揚水装置により混合泥水として地上に排送し、この混合泥水を固形の分別沈積物と液状の分別泥水とに分離して、回収した分別泥水を清掃対象の下水用埋設管の清掃用及び洗浄用に循環利用すると共に、回収した分別沈積物を処理場に移送し、残水は下水管へ放流処分するもので、下水管内を流下する小流量の下水や滞留している下水を有効に利用するほか、下水管内を清掃するに必要な最少限の水を補充するだけで、下水用埋設管の清掃を終了することができる。   As described in detail above, the method of cleaning the sewage buried pipe of the present invention is carried out, and the accumulated deposits and the inside of the upstream manhole, the downstream manhole, and the buried sewage pipe that communicates these are Deposits etc. are discharged to the ground as mixed mud by dredging equipment, and this mixed mud is separated into solid fractionated sediment and liquid fractionated mud, and the collected fractionated mud is collected in the sewage buried pipe for cleaning. In addition to recycling for cleaning and cleaning, the collected sediment is transferred to the treatment plant, and the remaining water is discharged into the sewer pipe. The small amount of sewage that flows down the sewer pipe and the remaining sewage In addition to the effective use of the sewage, the cleaning of the buried pipe for sewage can be completed only by replenishing the minimum amount of water necessary for cleaning the inside of the sewage pipe.

従って、本発明の下水用埋設管の清掃方法によれば、移動可能な可搬装置を設置して稼働するための作業者の労力が、大幅に軽減されるうえ、工期を短縮できる利点があるほか、施工時期の選定に制約が少ないという利点もあり、作業管理の経費ばかりでなく、作業地域の環境保全などの費用の節減にも格段の効果がある。   Therefore, according to the cleaning method of the sewage buried pipe of the present invention, the labor of the operator for installing and operating the movable portable device is greatly reduced, and there is an advantage that the construction period can be shortened. In addition, there is an advantage that there are few restrictions on the selection of the construction time, and not only the cost of work management but also the cost saving such as environmental conservation in the work area is remarkably effective.

本発明の下水用埋設管の清掃方法は、下水管内を流下する小流量の下水や滞留している下水を有効に利用して、下水用埋設管の内部に沈積し又は付着した多量の汚物や土砂などを、比較的に簡素で機動性に優れた装置を使用して、労力を少なく且つ短時間で清掃除去することができるもので、下水用埋設管内部に発生した通水障害を迅速に処理して、下水道の機能を回復させるのに利用することができるほか、清掃中に蓄積された分別泥水を圧力水として下水管内をジェット噴射した後、清浄化した管路の欠陥や損傷などの有無を調査して、直ちに応急の修理を施すか、或いは事後の下水道の保守管理計画の立案用資料とすることもでき、更には又、既設の埋設管における損傷などに基づく陥没事故の予防などにも、広く利用することができる。   The method for cleaning a sewage buried pipe according to the present invention effectively utilizes a small flow rate of sewage flowing down in the sewage pipe or a stagnant sewage, and deposits or adheres to the sewage buried pipe. Soil and sand can be cleaned and removed in a short time with less labor using a relatively simple and highly mobile device. It can be used to recover the functions of the sewer system, and after the jetting of the inside of the sewer pipe using the separated muddy water accumulated during the cleaning as the pressure water, the defect or damage of the cleaned pipe line Investigate the presence or absence and make immediate emergency repairs, or use it as material for planning the sewerage maintenance management plan afterwards, and also prevent collapse accidents based on damage to existing buried pipes, etc. Can also be widely used .

1 上流側マンホール
1a 上流側下水管
1b 埋設下水管
1b1 沈積物
1b2 付着物
2 下流側マンホール
2a 下流側下水管
2b1 沈積物
2b2 付着物
3 浚渫揚水装置
30 混合泥水
31 沈積物
32 分別泥水
3a 水中ポンプ
3a1 吐出口
3a2 フック
3a3 濾板
3b 吸引ポンプ
3b1 吸引管
3b2 籠型濾筒
3c 送水管
3d 吊り具
4 沈積物分別泥水槽
4a 沈積物分離装置
41 仕切壁
42 沈降室
43 泥水室
44 給水弁
5 送水ポンプ
5a 耐圧管
50 圧力水
6 清掃ノズル装置
6a1 操作棒
6a2 基台
6a3 保護棒
6b 洗浄ヘッド
7 内壁清掃装置
7a 球体
7a1 前環
7a2 後環
7b1 前牽引ワイヤ
7b2 後牽引ワイヤ
7c1 前方ウィンチ
7c2 後方ウィンチ
7d1 換気装置
7d2 換気装置
8 搬送装置
1 Upstream manhole 1a Upstream sewage pipe 1b Embedded sewage pipe 1b1 Sediment 1b2 Deposit 2 Downstream manhole 2a Downstream sewage pipe 2b1 Sediment 2b2 Deposit 3 Reed pumping device 30 Mixed mud water 31 Sediment 3a Sorted muddy water 3a 3a1 Discharge port 3a2 Hook 3a3 Filter plate 3b Suction pump 3b1 Suction tube 3b2 Vertical filter tube 3c Water supply pipe 3d Hanger 4 Sediment separation mud tank 4a Sediment separation device 41 Partition wall 42 Sedimentation chamber 4 3 Muddy water valve 4 4 Pump 5a Pressure tube 50 Pressure water 6 Cleaning nozzle device 6a1 Operation rod 6a2 Base 6a3 Protective rod 6b Cleaning head 7 Inner wall cleaning device 7a Sphere 7a1 Front ring 7a2 Rear ring 7b1 Front towing wire 7b2 Rear towing wire 7c1 Forward towing winch 7c1 Ventilator 7d2 Ventilator 8 Conveyor

Claims (2)

上流側マンホールと下流側マンホールとこれらを連通する埋設下水管との内部を清掃するに当たり、該下流側マンホール内の沈積物及び付着物を浚渫揚水装置により混合泥水として地上の沈積物分別泥水槽に排送する第1工程と、該上流側マンホール内の沈積物及び付着物を該浚渫揚水装置により混合泥水として地上の該沈積物分別泥水槽に排送する第2工程とを、順次に実施すると同時に、該沈積物分別泥水槽で分離された回収泥水の少なくとも一部を該上流側マンホール内に送入し、且つ該沈積物分別泥水槽で分離された回収沈積物を処理場に移送する処分工程を実施し、次いで該埋設下水管内の残物を移動可能な内壁清掃装置により清掃して該下流側マンホール内に流下させる第3工程と、前記第1工程と、前記処分工程とを同時に実施するに際し、前記浚渫揚水装置として、浚渫用高揚程水中ポンプ装置と、該水中ポンプ装置の吐出水を作動流体とするジェット式吸引ポンプ装置とを組み合わせて構成した揚水装置を、懸垂使用することを特徴とする、下水用埋設管の清掃方法。   When cleaning the interior of the upstream and downstream manholes and the buried sewage pipes that connect them, the deposits and deposits in the downstream manholes are mixed as mud by a dredging device into the sediment deposit mud tank on the ground. When the first step of discharging and the second step of discharging the sediment and deposits in the upstream manhole as mixed mud water to the sediment separation mud tank on the ground by the dredging pump are sequentially performed. At the same time, at least part of the recovered mud separated in the sediment separation mud tank is sent into the upstream manhole, and the collected sediment separated in the sediment separation mud tank is transferred to the treatment plant. Next, the third step of cleaning the residue in the buried sewage pipe with a movable inner wall cleaning device and flowing it down into the downstream manhole, the first step, and the disposal step are performed at the same time. In this case, as the dredging pumping device, a pumping device constituted by combining a high-lifting submersible pump device for dredging and a jet type suction pump device using the discharge water of the submersible pump device as a working fluid is suspended. A method for cleaning a buried pipe for sewage. 前記沈積物分別泥水槽で分離された回収泥水の一部を、前記上流側マンホール、前記下流側マンホール、又は前記埋設下水管の洗浄用水として使用する、請求項1に記載の下水用埋設管の清掃方法。 2. The sewage buried pipe according to claim 1, wherein a part of the recovered muddy water separated in the sediment separation mud tank is used as cleaning water for the upstream manhole, the downstream manhole, or the buried sewage pipe. Cleaning method.
JP2009199391A 2009-08-31 2009-08-31 How to clean buried sewage pipes Expired - Fee Related JP4510922B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009199391A JP4510922B1 (en) 2009-08-31 2009-08-31 How to clean buried sewage pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009199391A JP4510922B1 (en) 2009-08-31 2009-08-31 How to clean buried sewage pipes

Publications (2)

Publication Number Publication Date
JP4510922B1 true JP4510922B1 (en) 2010-07-28
JP2011052376A JP2011052376A (en) 2011-03-17

Family

ID=42582561

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009199391A Expired - Fee Related JP4510922B1 (en) 2009-08-31 2009-08-31 How to clean buried sewage pipes

Country Status (1)

Country Link
JP (1) JP4510922B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104895186A (en) * 2015-04-10 2015-09-09 冯振鹏 Dredging device of sewer well
CN112361125A (en) * 2020-10-27 2021-02-12 胡界鹏 Automatic clear silt device of pipeline inner wall for hydraulic engineering

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5548739B2 (en) * 2012-07-24 2014-07-16 株式会社エステック How to drain the manhole
JP6074204B2 (en) * 2012-09-26 2017-02-01 住友電設株式会社 Filling method for underground pipe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07119203A (en) * 1992-04-07 1995-05-09 Kido Kensetsu Kogyo Kk Pipe inside cleaning method
JPH1018406A (en) * 1996-06-28 1998-01-20 Yokoshima:Kk Dredging method for earth and sand built up in pipeline
JP2007016469A (en) * 2005-07-07 2007-01-25 Kawasaki Kaiji:Kk Discharging construction method of adit deposit sediment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07119203A (en) * 1992-04-07 1995-05-09 Kido Kensetsu Kogyo Kk Pipe inside cleaning method
JPH1018406A (en) * 1996-06-28 1998-01-20 Yokoshima:Kk Dredging method for earth and sand built up in pipeline
JP2007016469A (en) * 2005-07-07 2007-01-25 Kawasaki Kaiji:Kk Discharging construction method of adit deposit sediment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104895186A (en) * 2015-04-10 2015-09-09 冯振鹏 Dredging device of sewer well
CN112361125A (en) * 2020-10-27 2021-02-12 胡界鹏 Automatic clear silt device of pipeline inner wall for hydraulic engineering

Also Published As

Publication number Publication date
JP2011052376A (en) 2011-03-17

Similar Documents

Publication Publication Date Title
US4134174A (en) Sewer and catch basin cleaner
CN205116250U (en) Sediment removal device of reservoir among hydraulic engineering
CN103669557B (en) Underground conduit dredging engineering method
CN109056761A (en) Channel cleanout method
JP4510922B1 (en) How to clean buried sewage pipes
JP2014512469A (en) Apparatus and method for taking out solid matter in water bottom
JP6242097B2 (en) Underground drainage pump equipment
CN110747965A (en) Expansion-draw pipe construction process for reconstruction and expansion of drainage pipe network
CN102583615A (en) Method modifying horizontal flow sedimentation tank into sedimentation floatation tank and modified sedimentation floatation tank
JP4168314B2 (en) Sand collection device for sand basin
CN105908826A (en) Urban drainage pipeline capable of conveniently achieving dredging and blocking preventing
KR100953397B1 (en) Infiltration system with cleaning system using riverbed filtration
CN106337493A (en) Underground bye wash dredging and fishing device and dredging and fishing method thereof
CN102330468B (en) Intelligent sewage-cleaning equipment
JP2005220598A (en) Equipment for cleaning accumulated sediment on bottom of river
KR20060030086A (en) A dredging machine by the remote control
JP6097525B2 (en) Pipe cleaning method and pipe cleaning system
JP2002292209A (en) Sand collector of sedimentation basin
KR101072567B1 (en) Circulating apparatus for continuously separating of mud byusing underground pipeline excavation
KR100457906B1 (en) The method of construction and apparatus for propulsion medium and small diameter steelpipe
CN104452960A (en) Urban drainage pipeline silt remover
US3312284A (en) Apparatus for cleaning infiltration type water collector
CN212757374U (en) Water circulation system for treating open caisson mud by using water flushing method
KR100717425B1 (en) Apparatus for sorting sludge sewerage end
CN215715946U (en) High-pressure jet flow dredging assembly of dredging vehicle

Legal Events

Date Code Title Description
TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100430

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130514

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees