JP7798690B2 - Dredging Equipment - Google Patents
Dredging EquipmentInfo
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- JP7798690B2 JP7798690B2 JP2022087644A JP2022087644A JP7798690B2 JP 7798690 B2 JP7798690 B2 JP 7798690B2 JP 2022087644 A JP2022087644 A JP 2022087644A JP 2022087644 A JP2022087644 A JP 2022087644A JP 7798690 B2 JP7798690 B2 JP 7798690B2
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Description
本発明は、浚渫装置に関する。 The present invention relates to dredging equipment.
河川、運河、湖、ダム貯水池、ポンプ沈砂池などの水中の底部に堆積した堆積土砂を取り除く浚渫方法として、水中サンドポンプにより流体輸送を行うもの（特許文献１参照）、真空発生装置により気流搬送を行なうもの（特許文献２参照）、真空発生装置および圧送ポンプにより気流搬送を行なうもの（特許文献３参照）などが知られている。 Dredging methods for removing sediment deposited at the bottom of rivers, canals, lakes, dam reservoirs, pump sedimentation basins, etc. include those that use a submersible sand pump to transport fluid (see Patent Document 1), those that use a vacuum generator to transport air (see Patent Document 2), and those that use a vacuum generator and a pressure pump to transport air (see Patent Document 3).
しかしながら、特許文献１の浚渫方法は、撹拌用スクリュー（回転翼）を回転して堆積土砂を掘削撹拌してから吸引するため、水中の底部の堆積土砂を回収できるものの、作業水域が汚濁してしまう。その結果、ダム貯水池から濁水が放流されてしまう場合があり、ダム貯水池から河川や海に放流された濁水によって漁業に悪影響を及ぼすことも懸念される。
また、特許文献２のように真空発生装置により水底の堆積土砂を吸引して上方の回収タンクに搬送する場合、絶対真空条件下であってもトリチェリの原理により揚程が１０ｍ（７６０ｍｍHg）以下とされている。そのため、揚程が高くなると真空吸引効果が低下してしまい、比重や粘性の高い泥土や土砂の搬送が困難となってしまう。
また、特許文献３のように真空発生装置および圧送ポンプを併用して水底の堆積土砂を回収タンクまで搬送する場合、真空発生装置の吸引による水底から筐体までの揚程を１０ｍ以下に設定すれば筐体までは堆積土砂を搬送できるが、筐体から回収タンクまでの揚程が高くなると圧送ポンプによる搬送力も低下してしまうことがあった。
本発明は、上記事情に鑑みてなされたものであり、作業水域の汚濁を抑制するとともに、水深の深い場所の堆積土砂を回収する上で有利な浚渫装置を提供することを目的とする。
However, the dredging method of Patent Document 1 involves rotating a stirring screw (rotor) to excavate and stir the sediment and then suck it up, which can recover the sediment at the bottom of the water, but it also pollutes the working waters, which can result in the release of muddy water from the dam reservoir, and there are concerns that the release of muddy water from the dam reservoir into rivers and the sea could have a negative impact on the fishing industry.
Furthermore, when using a vacuum generator to suck sediment from the bottom of the water and transport it to a recovery tank above, as in Patent Document 2, the Torricelli principle dictates that the lift must be 10 m (760 mmHg) or less even under absolute vacuum conditions. Therefore, as the lift increases, the vacuum suction effect decreases, making it difficult to transport mud and sediment with high specific gravity and viscosity.
Furthermore, when using a vacuum generator and a pressure pump in combination to transport sediment deposited at the bottom of the water to a recovery tank as in Patent Document 3, the sediment can be transported to the housing if the lift from the bottom of the water to the casing by the suction of the vacuum generator is set to 10 m or less; however, if the lift from the casing to the recovery tank becomes too high, the transporting power of the pressure pump may also decrease.
The present invention has been made in consideration of the above circumstances, and aims to provide a dredging device that is advantageous in suppressing pollution of working waters and recovering sediment deposited in deep water areas.
上述した目的を達成するため本発明の一実施形態は、水中の底部に堆積した堆積土砂を回収する浚渫装置であって、水中に配置された第１筐体と、前記第１筐体の内部に配置された第１圧送ポンプと、前記第１筐体に設けられ、その先端が前記水中の底部に配置される土砂吸い込み管と、前記第１筐体の上方に配置された第２筐体と、前記第２筐体の内部に配置された第２圧送ポンプと、水上に配置された真空吸引装置と、前記真空吸引装置と前記第１筐体とを接続する第１真空吸引路と、前記真空吸引装置と前記第２筐体とを接続する第２真空吸引路と、前記第１圧送ポンプと前記第２筐体とを接続し、前記第１筐体内の堆積土砂を前記第２筐体に圧送する第１圧送路と、前記第２圧送ポンプと前記第２真空吸引路とを接続し、前記第２筐体内の堆積土砂を前記第２真空吸引路に圧送する第２圧送路とを備える。
また、本発明の一実施形態は、前記真空吸引装置は単一であって、前記第２真空吸引路は、前記第２筐体の上方で前記第１真空吸引路に接続され、前記第２真空吸引路の接続箇所から前記真空吸引装置までの前記第１真空吸引路は、前記第２真空吸引路を兼ねていることを特徴とする。
また、本発明の一実施形態は、前記真空吸引装置は単一であって、前記第２筐体は、前記第１真空吸引路の途中に介設されており、前記第１真空吸引路は、前記第２筐体を含んで構成され、前記第２筐体から前記真空吸引装置までの前記第１真空吸引路は、前記第２真空吸引路を兼ねていることを特徴とする。
また、本発明の一実施形態は、前記真空吸引装置は単一であって、前記第１筐体と前記第２筐体との間に少なくとも一つ配置された第３筐体と、前記第３筐体の内部に配置された第３圧送ポンプと、前記第３圧送ポンプと前記第２筐体とを接続し、前記第３筐体内の堆積土砂を前記第２筐体に圧送する第３圧送路と、をさらに備え、前記第２筐体と前記第３筐体は、前記第１真空吸引路の途中に介設されており、前記第１真空吸引路は、前記第２筐体と前記第３筐体とを含んで構成され、前記第１圧送路は、前記第１圧送ポンプと前記第２筐体とを、前記第３圧送ポンプと前記第３圧送路を介して接続して前記第１筐体内の堆積土砂を前記第２筐体に圧送し、前記第２筐体から前記真空吸引装置までの前記第１真空吸引路は、前記第２真空吸引路を兼ねていることを特徴とする。
また、本発明の一実施形態は、前記第１真空吸引路の途中に介設されて水上に配置され、堆積土砂を回収する回収タンクをさらに備え、前記水中の底部から前記第１筐体の下端までの高さ、前記第１筐体の下端から前記第２筐体の下端までの高さ、および前記第２筐体の下端から前記回収タンクの前記第１真空吸引路の接続位置までの高さは、それぞれ６ｍ～９ｍであることを特徴とする。
また、本発明の一実施形態は、前記第１筐体に設けられ、前記第１筐体の内部に空気を供給する第１給気管と、前記第２筐体に設けられ、前記第２筐体の内部に空気を供給する第２給気管と、をさらに備えることを特徴とする。
また、本発明の一実施形態は、前記第１真空吸引路の途中に介設されて水上に配置され、堆積土砂を回収する回収タンクをさらに備え、前記水中の底部から前記第１筐体の下端までの高さ、前記第１筐体の下端から前記第３筐体の下端までの高さ、前記第３筐体の下端から前記第２筐体の下端までの高さ、および前記第２筐体の下端から前記回収タンクの前記第１真空吸引路の接続位置までの高さは、それぞれ６ｍ～９ｍであることを特徴とする。
また、本発明の一実施形態は、前記第１筐体に設けられ、前記第１筐体の内部に空気を供給する第１給気管と、前記第２筐体に設けられ、前記第２筐体の内部に空気を供給する第２給気管と、前記第３筐体に設けられ、前記第３筐体の内部に空気を供給する第３給気管とをさらに備えることを特徴とする。
In order to achieve the above-mentioned object, one embodiment of the present invention is a dredging device for recovering sediment deposited on the bottom of water, comprising: a first housing placed underwater; a first pressure pump placed inside the first housing; a sediment suction pipe provided in the first housing and whose tip is placed at the bottom of the water; a second housing placed above the first housing; a second pressure pump placed inside the second housing; a vacuum suction device placed on the water; a first vacuum suction line connecting the vacuum suction device to the first housing; a second vacuum suction line connecting the vacuum suction device to the second housing; a first pressure transfer line connecting the first pressure transfer pump to the second housing and pressurizing the sediment in the first housing to the second housing; and a second pressure transfer line connecting the second pressure transfer pump to the second vacuum suction line and pressurizing the sediment in the second housing to the second vacuum suction line.
Furthermore, one embodiment of the present invention is characterized in that the vacuum suction device is single, the second vacuum suction path is connected to the first vacuum suction path above the second housing, and the first vacuum suction path from the connection point of the second vacuum suction path to the vacuum suction device also serves as the second vacuum suction path.
Furthermore, one embodiment of the present invention is characterized in that the vacuum suction device is single, the second housing is interposed in the middle of the first vacuum suction path, the first vacuum suction path is configured to include the second housing, and the first vacuum suction path from the second housing to the vacuum suction device also serves as the second vacuum suction path.
In addition, one embodiment of the present invention is characterized in that the vacuum suction device is a single device and further comprises at least one third housing arranged between the first housing and the second housing, a third pressure pump arranged inside the third housing, and a third pressure delivery line connecting the third pressure delivery pump to the second housing and pressure delivery of the deposited sediment in the third housing to the second housing, wherein the second housing and the third housing are interposed in the middle of the first vacuum suction line, the first vacuum suction line includes the second housing and the third housing, the first pressure delivery line connects the first pressure delivery pump to the second housing via the third pressure delivery pump and the third pressure delivery line and pressure delivery of the deposited sediment in the first housing to the second housing, and the first vacuum suction line from the second housing to the vacuum suction device also serves as the second vacuum suction line.
Furthermore, one embodiment of the present invention further comprises a recovery tank that is interposed in the middle of the first vacuum suction path and placed on the water to recover sediment, and is characterized in that the height from the bottom of the water to the lower end of the first housing, the height from the lower end of the first housing to the lower end of the second housing, and the height from the lower end of the second housing to the connection position of the first vacuum suction path of the recovery tank are each 6 m to 9 m.
Furthermore, one embodiment of the present invention is characterized in that it further comprises a first air intake pipe provided in the first housing and supplying air to the inside of the first housing, and a second air intake pipe provided in the second housing and supplying air to the inside of the second housing.
Furthermore, one embodiment of the present invention further comprises a recovery tank that is interposed in the middle of the first vacuum suction path and placed on the water to recover sediment, and is characterized in that the height from the bottom of the water to the lower end of the first housing, the height from the lower end of the first housing to the lower end of the third housing, the height from the lower end of the third housing to the lower end of the second housing, and the height from the lower end of the second housing to the connection position of the first vacuum suction path of the recovery tank are each 6m to 9m.
Furthermore, one embodiment of the present invention is characterized in that it further comprises a first air intake pipe provided in the first housing and supplying air to the inside of the first housing, a second air intake pipe provided in the second housing and supplying air to the inside of the second housing, and a third air intake pipe provided in the third housing and supplying air to the inside of the third housing.
本発明の一実施形態によれば、水中に配置され内部に第１圧送ポンプが配置された第１筐体と、第１筐体の上方に配置され内部に第２圧送ポンプが配置された第２筐体とを備え、真空吸引装置により土砂吸い込み管および第１真空吸引路を介して堆積土砂を吸引して第１筐体に搬送した後、第１筐体内の堆積土砂を第１圧送ポンプにより第１圧送路を介して第２筐体に圧送し、第２筐体内の堆積土砂を第２圧送ポンプにより第２圧送路を介して第２真空吸引路に圧送して浚渫作業を行うため、作業水域の汚濁を抑制するとともに、水深の深い場所の堆積土砂を回収する上で有利となる。
また、第２真空吸引路が第２筐体の上方で第１真空吸引路に接続され、第２真空吸引路の接続箇所から真空吸引装置までの第１真空吸引路が第２真空吸引路を兼ねた構成とすると、第１真空吸引路により第２筐体を介さずに第１筐体と真空吸引装置とを接続できるため、真空吸引装置による吸引力を高める上で有利となる。
また、第２筐体を第１真空吸引路の途中に介設して第１真空吸引路が第２筐体を含む構成とすると、浚渫装置を簡素に構成できるとともにコストを削減する上で有利となる。
また、水中の底部から第１筐体の下端までの高さ、第１筐体の下端から第２筐体の下端までの高さ、および第２筐体の下端から回収タンクの第１真空吸引路の接続位置までの高さをそれぞれ６ｍ～９ｍとして構成すると、第１圧送ポンプおよび第２圧送ポンプによる搬送力の低下を抑制しながら水中の底部からの揚程を高くする上で有利となる。
また、第１筐体に第１筐体の内部に空気を供給する第１給気管を設け、第２筐体に第２筐体の内部に空気を供給する第２給気管を設けた構成とすると、真空吸引路や圧送路への圧力を調整することができ、堆積土砂の搬送力を高める上で有利となる。
また、第１筐体と第２筐体の間に第３圧送ポンプを備えた第３筐体を少なくとも一つ配置し、第１筐体内の堆積土砂を第３筐体に圧送した後、第３筐体内の堆積土砂を第２筐体に圧送することで、堆積土砂の搬送力を維持しながら水中の底部からの揚程を高くする上で有利となる。
また、水中の底部から第１筐体の下端までの高さ、第１筐体の下端から第３筐体の下端までの高さ、第３筐体の下端から第２筐体の下端までの高さ、および第２筐体の下端から回収タンクの第１真空吸引路の接続位置までの高さをそれぞれ６ｍ～９ｍとして構成すると、第１圧送ポンプ、第２圧送ポンプ、および第３圧送ポンプによる搬送力の低下を抑制しながら水中の底部からの揚程を高くする上で有利となる。
また、第１筐体に第１筐体の内部に空気を供給する第１給気管を設け、第２筐体に第２筐体の内部に空気を供給する第２給気管を設け、第３筐体に第３筐体の内部に空気を供給する第３給気管を設けた構成とすると、真空吸引路や圧送路への圧力を調整することができ、堆積土砂の搬送力を高める上で有利となる。
According to one embodiment of the present invention, the dredging operation is carried out by sucking sediment from a first housing that is placed underwater and has a first pressure pump disposed therein, and a second housing that is placed above the first housing and has a second pressure pump disposed therein, and then using a vacuum suction device to suck up the sediment through a sediment suction pipe and a first vacuum suction line and transporting it to the first housing, and then using the first pressure pump to pressure-feed the sediment in the first housing through the first pressure feed line to the second housing, and then using the second pressure pump to pressure-feed the sediment in the second housing through the second pressure feed line to the second vacuum suction line, thereby preventing pollution of the working water area and being advantageous for recovering sediment from deep waters.
Furthermore, if the second vacuum suction path is connected to the first vacuum suction path above the second housing, and the first vacuum suction path from the connection point of the second vacuum suction path to the vacuum suction device also serves as the second vacuum suction path, the first vacuum suction path can connect the first housing and the vacuum suction device without going through the second housing, which is advantageous in increasing the suction force of the vacuum suction device.
Furthermore, if the second housing is interposed in the middle of the first vacuum suction path so that the first vacuum suction path includes the second housing, the dredging device can be configured simply and this is advantageous in terms of reducing costs.
Furthermore, if the height from the bottom of the water to the lower end of the first housing, the height from the lower end of the first housing to the lower end of the second housing, and the height from the lower end of the second housing to the connection position of the first vacuum suction line of the recovery tank are each set to 6 m to 9 m, this is advantageous in increasing the lift from the bottom of the water while suppressing a decrease in the conveying force of the first pressure pump and the second pressure pump.
Furthermore, if the first housing is provided with a first air supply pipe for supplying air to the inside of the first housing, and the second housing is provided with a second air supply pipe for supplying air to the inside of the second housing, the pressure on the vacuum suction path and the pressure transport path can be adjusted, which is advantageous in increasing the transport force of the deposited sediment.
In addition, by placing at least one third housing equipped with a third pressure pump between the first housing and the second housing, and pressurizing the sediment in the first housing to the third housing, and then pressurizing the sediment in the third housing to the second housing, it is advantageous to increase the lift from the bottom of the water while maintaining the transport force of the sediment.
Furthermore, if the height from the bottom of the water to the lower end of the first housing, the height from the lower end of the first housing to the lower end of the third housing, the height from the lower end of the third housing to the lower end of the second housing, and the height from the lower end of the second housing to the connection position of the first vacuum suction line of the recovery tank are each set to 6 m to 9 m, this is advantageous in increasing the lift from the bottom of the water while suppressing a decrease in the conveying force of the first pressure pump, second pressure pump, and third pressure pump.
Furthermore, if the first housing is provided with a first air supply pipe for supplying air to the interior of the first housing, the second housing is provided with a second air supply pipe for supplying air to the interior of the second housing, and the third housing is provided with a third air supply pipe for supplying air to the interior of the third housing, the pressure on the vacuum suction path and the pressure transport path can be adjusted, which is advantageous in increasing the transport force of the deposited sediment.
（第１の実施形態）
以下、本発明の実施形態について図面を参照して説明する。
第１の実施形態の浚渫装置１０Ａは、河川、運河、湖、ダム貯水池、ポンプ沈砂池などの水中の底部に堆積した堆積土砂を回収して浚渫するものである。
堆積土砂は、比重および粘性の高い汚泥や泥土等を含んでおり、浚渫装置１０Ａでは、堆積土砂の水中吸引、鉛直搬送および水平搬送を一貫して連続的に行う。
第１の実施形態において、浚渫装置１０Ａは、ダム貯水池Ｗの底部Ｂに堆積した堆積土砂Ｄを浚渫する。
(First embodiment)
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The dredging device 10A of the first embodiment is for collecting and dredging sediment deposited at the bottom of underwater bodies of water such as rivers, canals, lakes, dam reservoirs, and pump sedimentation basins.
The sediment contains sludge, mud, etc., which have high specific gravity and viscosity, and the dredging device 10A consistently and continuously performs underwater suction, vertical transport, and horizontal transport of the sediment.
In the first embodiment, the dredging device 10A dredges sediment D accumulated at the bottom B of a dam reservoir W.
図１、２に示すように、浚渫装置１０Ａは、第１中継ポンプユニット１２と、土砂吸い込み管１４と、オーガ付き吸引機１６と、第２中継ポンプユニット１８と、回収タンク２０と、フィルタ２２と、真空吸引装置２４と、第１真空吸引路２６と、第２真空吸引路２８と、第１圧送路３０と、第２圧送路３２と、搬送ポンプ３４と、回収土砂処理設備３６（振動ふるい、濁水処理設備、沈砂池等）と、を備えて構成されている。
回収タンク２０、フィルタ２２、真空吸引装置２４、搬送ポンプ３４、および回収土砂処理設備３６は、陸上（水上）に配置されている。
As shown in Figures 1 and 2, the dredging device 10A is configured to include a first relay pump unit 12, a sediment suction pipe 14, an auger-equipped suction machine 16, a second relay pump unit 18, a recovery tank 20, a filter 22, a vacuum suction device 24, a first vacuum suction line 26, a second vacuum suction line 28, a first pressure feed line 30, a second pressure feed line 32, a conveying pump 34, and recovered sediment treatment equipment 36 (vibrating screen, turbid water treatment equipment, settling tank, etc.).
The recovery tank 20, filter 22, vacuum suction device 24, transfer pump 34, and recovered soil treatment equipment 36 are located on land (on water).
第１中継ポンプユニット１２は、第１筐体４０と、第１圧送ポンプ４２と、第１給気管４４と、真空ゲージ４６とを備えて構成されている。
第１筐体４０は、直方体形状で水密に構成されており、ダム貯水池Ｗの水中に配置されている。
第１筐体４０は、台船９０上に設置された門型設備９２のワイヤーロープ９２０２により昇降可能に吊り下げられており、第１筐体４０に取り付けられた土砂吸い込み管１４およびオーガ付き吸引機１６は、第１筐体４０の下降にともなってダム貯水池Ｗの底部Ｂまで下降される。
第１圧送ポンプ４２は、第１筐体４０の内部に配置されており、後述する第１圧送路３０により第１筐体４０内の堆積土砂Ｄを上方に向けて圧送する。
第１給気管４４は、第１筐体４０に設けられ、第１筐体４０の内部に空気を供給する。
具体的には、本実施形態の第１給気管４４は、一方の端部が第１筐体４０の上面に取り付けられ、第１筐体４０の上方に向けて延在した他方の端部が水上に位置しており、空気を取り入れられるよう設置されている。
第１給気管４４には、不図示の開閉バルブが設けられており、当該開閉バルブの制御を行うことで第１真空吸引路２６および第１圧送路３０への圧力を調整することができ、第１筐体４０から第２筐体５０へ所定の搬送量を維持しながら堆積土砂Ｄを搬送できる。
真空ゲージ４６は、第１筐体４０内の圧力（負圧）を測定する計器である。
The first relay pump unit 12 is configured to include a first housing 40 , a first pressure pump 42 , a first air supply pipe 44 , and a vacuum gauge 46 .
The first housing 40 is rectangular parallelepiped-shaped and watertight, and is placed underwater in the dam reservoir W.
The first housing 40 is suspended so that it can be raised and lowered by a wire rope 9202 of a gate-shaped facility 92 installed on a barge 90, and the soil suction pipe 14 and the auger-equipped suction machine 16 attached to the first housing 40 are lowered to the bottom B of the dam reservoir W as the first housing 40 descends.
The first pressure pump 42 is disposed inside the first housing 40 and pressure-feeds the sediment D inside the first housing 40 upward through the first pressure path 30 described below.
The first air supply pipe 44 is provided in the first housing 40 and supplies air to the inside of the first housing 40 .
Specifically, in this embodiment, the first air intake pipe 44 has one end attached to the top surface of the first housing 40 and the other end extending above the first housing 40 and positioned above the water, so as to be able to take in air.
The first air supply pipe 44 is provided with an opening/closing valve (not shown), and by controlling this opening/closing valve, the pressure to the first vacuum suction path 26 and the first pressure feed path 30 can be adjusted, and the deposited sediment D can be transported from the first housing 40 to the second housing 50 while maintaining a predetermined transport amount.
The vacuum gauge 46 is an instrument that measures the pressure (negative pressure) inside the first housing 40 .
土砂吸い込み管１４は、第１筐体４０に設けられ、その先端が水中の底部Ｂに配置される。
具体的には、土砂吸い込み管１４は、後端が第１筐体４０の底面に取り付けられ、第１筐体４０の下方に向けて延在した先端に傾斜した吸引口１４０２が設けられ、吸引口１４０２がダム貯水池Ｗの水中の底部Ｂに挿入するよう配置されている。
土砂吸い込み管１４は、オーガ付き吸引機１６により掘削された堆積土砂Ｄを吸引し、第１筐体４０に搬送する。
The sediment suction pipe 14 is provided in the first housing 40, and its tip is positioned at the bottom B underwater.
Specifically, the rear end of the soil suction pipe 14 is attached to the bottom surface of the first housing 40, and an inclined suction port 1402 is provided at the tip extending downward from the first housing 40, and the suction port 1402 is positioned so that it can be inserted into the underwater bottom B of the dam reservoir W.
The sediment suction pipe 14 sucks up the accumulated sediment D excavated by the auger-equipped suction machine 16 and transports it to the first housing 40.
オーガ付き吸引機１６は、土砂吸い込み管１４の先端付近に設けられ、水中の底部Ｂに堆積した堆積土砂Ｄを掘削して切り崩すものであって、掘削刃１６０２（オーガ）を備えて構成されている。掘削刃１６０２は、不図示のモータの駆動力が伝達されることで回転する。
オーガ付き吸引機１６は、例えば掘削機（特開２０２１－３２００５号公報）に記載された掘削機など、公知の様々なものを適用可能である。
The auger-equipped suction machine 16 is provided near the tip of the sediment suction pipe 14, and excavates and breaks up the sediment D accumulated at the bottom B of the water, and is configured with an excavation blade 1602 (auger). The excavation blade 1602 rotates when a driving force from a motor (not shown) is transmitted to it.
The auger-equipped suction machine 16 can be any of various known excavators, such as the excavator described in Japanese Patent Application Laid-Open No. 2021-32005.
第２中継ポンプユニット１８は、第２筐体５０と、第２圧送ポンプ５２と、第２給気管５４と、真空ゲージ５６とを備えて構成されている。
第２筐体５０は、直方体形状で水密に構成されており、第１筐体４０の上方に配置されている。本実施形態の第２筐体５０は、陸上の斜面に載置されているが、第１筐体４０のように門型設備などによって吊り下げられていてもよい。
また、第２筐体５０は、第１筐体４０の上方であれば、ダム貯水池Ｗの水面や台船９０上に配置してもよいし、ダム貯水池Ｗの水中に配置してもよい。
第２圧送ポンプ５２は、第２筐体５０の内部に配置されており、後述する第２圧送路３２により第２筐体５０内の堆積土砂Ｄを上方に向けて圧送する。
第２給気管５４は、第２筐体５０に設けられ、第２筐体５０の内部に空気を供給する。
具体的には、本実施形態の第２給気管５４は、一方の端部が第２筐体５０の上面に取り付けられ、第２筐体５０の上方に向けて延在しており、空気を取り入れられるよう設置されている。
第２給気管５４には、不図示の開閉バルブが設けられており、当該開閉バルブの制御を行うことで第２真空吸引路２８および第２圧送路３２への圧力を調整することができ、第２筐体５０から回収タンク２０へ所定の搬送量を維持しながら堆積土砂Ｄを搬送できる。
真空ゲージ５６は、第２筐体５０内の圧力（負圧）を測定する計器である。
The second relay pump unit 18 is configured to include a second housing 50 , a second pressure pump 52 , a second air supply pipe 54 , and a vacuum gauge 56 .
The second housing 50 is rectangular and watertight, and is disposed above the first housing 40. The second housing 50 in this embodiment is placed on a slope on land, but may also be suspended from a gate-type facility or the like, like the first housing 40.
Furthermore, the second housing 50 may be placed on the water surface of the dam reservoir W or on the barge 90, or may be placed underwater in the dam reservoir W, provided that it is above the first housing 40.
The second pressure pump 52 is disposed inside the second housing 50 and pressure-feeds the sediment D inside the second housing 50 upward through a second pressure path 32 described below.
The second air supply pipe 54 is provided in the second housing 50 and supplies air to the inside of the second housing 50 .
Specifically, in this embodiment, one end of the second air intake pipe 54 is attached to the top surface of the second housing 50, extends toward the top of the second housing 50, and is installed so as to take in air.
The second air supply pipe 54 is provided with an opening/closing valve (not shown), and by controlling this opening/closing valve, the pressure to the second vacuum suction path 28 and the second pressure feed path 32 can be adjusted, and the deposited sediment D can be transported from the second housing 50 to the recovery tank 20 while maintaining a predetermined transport amount.
The vacuum gauge 56 is an instrument that measures the pressure (negative pressure) inside the second housing 50 .
回収タンク２０は、後述する第１真空吸引路２６の途中に介設されて陸上（水上）に配置され、第１真空吸引路２６によって吸引して搬送されてきた堆積土砂Ｄを回収する。回収された堆積土砂Ｄは、搬送ポンプ３４により回収土砂処理設備３６に排出される。
回収タンク２０は、第１真空吸引路２６による堆積土砂Ｄの吸引と、回収した堆積土砂Ｄの排出とを並行して連続的に実行できる機能を有している。
回収土砂処理設備３６は、搬送された堆積土砂Ｄを固体と水とに分離する固液分離装置など従来公知の様々な設備が採用可能である。分離された固体は、例えば排砂地等に運ばれたり、埋め立てに用いられ、分離された水は、例えば排水処理設備等で浄化した後、ダム貯水池Ｗに戻される。
The recovery tank 20 is disposed on land (or on water) in the middle of a first vacuum suction line 26 (described later) and recovers the sediment D that has been sucked and transported by the first vacuum suction line 26. The recovered sediment D is discharged to a recovered sediment treatment facility 36 by a transport pump 34.
The recovery tank 20 has the function of being able to continuously perform the suction of the sediment D through the first vacuum suction path 26 and the discharge of the recovered sediment D in parallel.
The recovered sediment treatment facility 36 may be any of a variety of conventionally known facilities, such as a solid-liquid separator that separates the transported sediment D into solids and water. The separated solids are transported to a sand removal area or used for landfill, and the separated water is purified, for example, in a wastewater treatment facility and then returned to the dam reservoir W.
真空吸引装置２４は、例えば単一の真空ポンプであって、陸上（水上）に配置され、フィルタ２２を介して土砂吸い込み管１４、第１真空吸引路２６、および第２真空吸引路２８を吸引する。これにより、土砂吸い込み管１４、第１筐体４０、第１真空吸引路２６、第２筐体５０、第２真空吸引路２８、および回収タンク２０の内部は負圧を維持される。 The vacuum suction device 24 is, for example, a single vacuum pump that is located on land (or water) and draws air through the sediment suction pipe 14, the first vacuum suction path 26, and the second vacuum suction path 28 via the filter 22. This maintains a negative pressure inside the sediment suction pipe 14, the first housing 40, the first vacuum suction path 26, the second housing 50, the second vacuum suction path 28, and the recovery tank 20.
第１真空吸引路２６は、真空吸引装置２４と第１筐体４０とを接続する真空吸引管により形成された吸引経路である。
第２真空吸引路２８は、真空吸引装置２４と第２筐体５０とを接続する真空吸引管により形成された吸引経路である。
第２真空吸引路２８は、第２筐体５０の上方で第１真空吸引路２６に接続されており、第２真空吸引路２８の接続箇所から真空吸引装置２４までの第１真空吸引路２６は、第２真空吸引路２８を兼ねている。
そして、第２真空吸引路２８を兼ねた第１真空吸引路２６の途中に、回収タンク２０とフィルタ２２とが介設されている。
The first vacuum suction path 26 is a suction path formed by a vacuum suction pipe that connects the vacuum suction device 24 and the first housing 40 .
The second vacuum suction path 28 is a suction path formed by a vacuum suction pipe that connects the vacuum suction device 24 and the second housing 50 .
The second vacuum suction path 28 is connected to the first vacuum suction path 26 above the second housing 50, and the first vacuum suction path 26 from the connection point of the second vacuum suction path 28 to the vacuum suction device 24 also serves as the second vacuum suction path 28.
A recovery tank 20 and a filter 22 are interposed in the middle of the first vacuum suction path 26 which also serves as the second vacuum suction path 28 .
第１圧送路３０は、第１圧送ポンプ４２と第２筐体５０とを接続する圧送管により形成された圧送経路であって、第１筐体４０内の堆積土砂Ｄを第２筐体５０に圧送する。
第２圧送路３２と、第２圧送ポンプ５２と第２真空吸引路２８とを接続する圧送管により形成された圧送経路であって、第２筐体５０内の堆積土砂Ｄを第２真空吸引路２８に圧送する。
The first pressure-transfer path 30 is a pressure-transfer path formed by a pressure-transfer pipe connecting the first pressure-transfer pump 42 and the second housing 50, and pressurizes the sediment D inside the first housing 40 to the second housing 50.
The pressure transfer path is formed by a pressure transfer pipe connecting the second pressure transfer path 32, the second pressure transfer pump 52, and the second vacuum suction path 28, and pressure transfers the accumulated sediment D in the second housing 50 to the second vacuum suction path 28.
次に、本実施形態の浚渫装置１０Ａによるダム貯水池Ｗの水中の底部Ｂから回収タンク２０までの堆積土砂Ｄの搬送および揚程について説明する。
上述したように、真空吸引装置により水中の底部の堆積土砂を吸引して上方の回収タンクに搬送する場合、絶対真空条件下であってもトリチェリの原理により揚程は１０ｍ以下が好ましいとされている。また、真空吸引装置および圧送ポンプを併用する場合、真空吸引装置の吸引による水底から筐体までの揚程を１０ｍ以下に設定すれば筐体までは堆積土砂を搬送できるが、筐体から回収タンクまでの揚程が高くなると、性能にも依存するが圧送ポンプによる搬送力も低下してしまうことがあった。
したがって、本実施形態では、ダム貯水池Ｗの底部から第１筐体４０までは真空吸引装置２４により堆積土砂Ｄを吸引し、第１筐体４０から第２筐体５０までは第１圧送ポンプ４２により、第２筐体５０から回収タンク２０までは第２圧送ポンプ５２により、それぞれ堆積土砂Ｄを圧送して搬送している。
そして、水中の底部Ｂから第１筐体４０の下端までの高さｈ１、第１筐体４０の下端から第２筐体５０の下端までの高さｈ２、および第２筐体５０の下端から回収タンク２０の第１真空吸引路２６の接続位置までの高さｈ３は、それぞれ６ｍ～９ｍに設定している。
したがって、本実施形態では、ダム貯水池Ｗの底部Ｂから回収タンク２０までを６ｍ～９ｍごとに分けて、真空吸引装置２４および２つの圧送ポンプ４２、５２によって堆積土砂Ｄを搬送することで、堆積土砂Ｄを回収タンク２０まで搬送させやすい構成となっている。
つまり、本実施形態の浚渫装置１０Ａは、ダム貯水池Ｗの底部Ｂから回収タンク２０までの高さＨ１が１８ｍ～２７ｍの揚程である場合に適している。また、大型の圧送ポンプは高価であるため、本実施形態のように複数の小型の圧送ポンプを配置することでコストを削減することもできる。
Next, the transportation and lifting of sediment D from the underwater bottom B of the dam reservoir W to the recovery tank 20 by the dredging device 10A of this embodiment will be described.
As mentioned above, when using a vacuum suction device to suck up sediment from the bottom of the water and transport it to a recovery tank above, Torricelli's principle dictates that a lift of 10 m or less is preferable, even under absolute vacuum conditions. Furthermore, when using a vacuum suction device and a pressure pump together, the sediment can be transported to the casing if the lift from the bottom of the water to the casing by the vacuum suction device is set to 10 m or less. However, if the lift from the casing to the recovery tank is too high, the transport power of the pressure pump may also decrease, depending on the performance.
Therefore, in this embodiment, the accumulated sediment D is sucked from the bottom of the dam reservoir W to the first housing 40 by a vacuum suction device 24, and is pressurized and transported from the first housing 40 to the second housing 50 by a first pressure pump 42, and from the second housing 50 to the recovery tank 20 by a second pressure pump 52.
The height h1 from the underwater bottom B to the lower end of the first housing 40, the height h2 from the lower end of the first housing 40 to the lower end of the second housing 50, and the height h3 from the lower end of the second housing 50 to the connection position of the first vacuum suction path 26 of the recovery tank 20 are each set to 6m to 9m.
Therefore, in this embodiment, the distance from the bottom B of the dam reservoir W to the recovery tank 20 is divided into 6 to 9 m intervals, and the sediment D is transported using a vacuum suction device 24 and two pressure pumps 42, 52, making it easy to transport the sediment D to the recovery tank 20.
That is, the dredging device 10A of this embodiment is suitable when the height H1 from the bottom B of the dam reservoir W to the recovery tank 20 has a head of 18 m to 27 m. In addition, since large pressure pumps are expensive, costs can be reduced by arranging multiple small pressure pumps as in this embodiment.
次に、本実施形態の浚渫装置１０Ａの浚渫作業の流れについて説明する。
第１中継ポンプユニット１２および第２中継ポンプユニット１３に真空吸引管および圧送管を接続することで、第１真空吸引路２６、第２真空吸引路２８、第１圧送路３０、および第２圧送路３２を形成する。
台船９０を堆積土砂Ｄを回収すべきダム貯水池Ｗの底部Ｂの上方に移動させて停止し、門型設備９２のワイヤーロープ９２０２により、土砂吸い込み管１４およびオーガ付き吸引機１６が設けられた第１中継ポンプユニット１２をダム貯水池Ｗの底部Ｂに向けて降下させる。
オーガ付き吸引機１６の掘削刃１６０２がダム貯水池Ｗの底部Ｂに到達したら、真空吸引装置２４によって土砂吸い込み管１４の吸引口１４０２から水を吸引させ、吸引口１４０２に向かって流れる水流を発生させる。
そして、不図示のモータを駆動して掘削刃１６０２を回転させ、掘削刃１６０２により堆積土砂Ｄを掘削して切り崩し、真空吸引装置２４により土砂吸い込み管１４から堆積土砂Ｄを吸引する。土砂吸い込み管１４により吸引された堆積土砂Ｄは、第１筐体４０の内部に搬送され回収される。
Next, the flow of dredging work by the dredging device 10A of this embodiment will be described.
By connecting a vacuum suction pipe and a pressure feed pipe to the first relay pump unit 12 and the second relay pump unit 13, a first vacuum suction path 26, a second vacuum suction path 28, a first pressure feed path 30, and a second pressure feed path 32 are formed.
The barge 90 is moved above the bottom B of the dam reservoir W from which the deposited sediment D is to be recovered and stopped, and the first relay pump unit 12, which is equipped with a sediment suction pipe 14 and an auger-equipped suction machine 16, is lowered toward the bottom B of the dam reservoir W using the wire rope 9202 of the gate-shaped equipment 92.
When the digging blade 1602 of the auger-equipped suction machine 16 reaches the bottom B of the dam reservoir W, the vacuum suction device 24 sucks water from the suction port 1402 of the soil suction pipe 14, generating a water flow toward the suction port 1402.
Then, a motor (not shown) is driven to rotate the excavation blade 1602, which excavates and breaks up the accumulated sediment D, and the vacuum suction device 24 sucks the accumulated sediment D through the sediment suction pipe 14. The accumulated sediment D sucked by the sediment suction pipe 14 is transported to the inside of the first housing 40 and collected.
次に、第１圧送ポンプ４２によって第１筐体４０の内部に回収された堆積土砂Ｄが圧送され、第１圧送路３０を通って第２筐体５０の内部に搬送され、堆積土砂Ｄが回収される。
堆積土砂Ｄが第２筐体５０に搬送されると、第２圧送ポンプ５２によって第２筐体５０の内部に回収された堆積土砂Ｄが圧送され、第２圧送路３２を通って第２真空吸引路２８に向けて搬送され、第２真空吸引路２８に合流する。そして、合流した堆積土砂Ｄは、真空吸引装置２４と第２圧送ポンプ５２とにより第２真空吸引路２８（第１真空吸引路２６）を通って回収タンク２０に搬送される。
一方で、真空吸引装置２４によって第１筐体４０の内部に回収された堆積土砂Ｄの一部が、第１真空吸引路２６および第２真空吸引路２８を通って、回収タンク２０に搬送される。
すなわち、真空吸引装置２４によって吸引され搬送された堆積土砂Ｄと、第１圧送ポンプ４２および第２圧送ポンプ５２により圧送された堆積土砂Ｄは、第２圧送路３２と第２真空吸引路２８の接続箇所において合流し、回収タンク２０に搬送される。
そして、回収タンク２０に回収された堆積土砂Ｄは、回収土砂処理設備３６に排出され、回収土砂処理設備３６により、個体と水とに分離され所定の処理が行われる。
Next, the sediment D collected inside the first housing 40 is pressurized by the first pressure pump 42 and transported through the first pressure path 30 to the inside of the second housing 50, where the sediment D is collected.
When the sediment D is transported to the second housing 50, the sediment D collected inside the second housing 50 is pumped by the second pressure pump 52 and transported through the second pressure path 32 toward the second vacuum suction path 28, where it merges with the second vacuum suction path 28. The merged sediment D is then transported by the vacuum suction device 24 and the second pressure pump 52 through the second vacuum suction path 28 (first vacuum suction path 26) to the recovery tank 20.
Meanwhile, a portion of the sediment D recovered inside the first housing 40 by the vacuum suction device 24 is transported to the recovery tank 20 through the first vacuum suction path 26 and the second vacuum suction path 28 .
That is, the sediment D sucked and transported by the vacuum suction device 24 and the sediment D pressurized by the first pressure pump 42 and the second pressure pump 52 merge at the connection point between the second pressure path 32 and the second vacuum suction path 28 and are transported to the recovery tank 20.
The sediment D collected in the collection tank 20 is then discharged to the collected sediment treatment facility 36, where it is separated into solids and water and subjected to the prescribed treatment.
このように、第１実施形態の浚渫装置１０Ａによれば、水中に配置され内部に第１圧送ポンプ４２が配置された第１筐体４０と、第１筐体４０の上方に配置され内部に第２圧送ポンプ５２が配置された第２筐体５０とを備え、真空吸引装置２４と第１筐体４０とを接続する第１真空吸引路２６、真空吸引装置２４と第２筐体５０とを接続する第２真空吸引路２８、第１圧送ポンプ４２と第２筐体５０とを接続する第１圧送路３０、および第２圧送ポンプ５２と第２真空吸引路２８とを接続する第２圧送路３２が形成されている。
そして、真空吸引装置２４により土砂吸い込み管１４および第１真空吸引路２６を介して堆積土砂Ｄを吸引して第１筐体４０に搬送した後、第１筐体４０内の堆積土砂Ｄを第１圧送ポンプ４２により第１圧送路３０を介して第２筐体５０に圧送し、第２筐体５０内の堆積土砂Ｄを第２圧送ポンプ５２により第２圧送路３２を介して第２真空吸引路２８に圧送し、回収タンク２０まで搬送する浚渫作業を行うため、作業水域の汚濁を抑制するとともに、水深の深い場所の堆積土砂Ｄを回収する上で有利となる。
すなわち、真空吸引装置２４によって発生させた気流により土砂吸い込み管１４から掘削された堆積土砂Ｄを吸引することで、ダム貯水池Ｗの底部Ｂの水を濁す前に堆積土砂Ｄを回収して汚濁を抑制することができ、第１圧送ポンプ４２および第２圧送ポンプ５２によって２段階に分けて搬送することで、水深の深いダム貯水池Ｗの底部Ｂ付近から陸上の回収タンク２０までの揚程であっても堆積土砂Ｄを回収できる。
さらに、浚渫作業においてダム貯水池Ｗの底部Ｂの水域の汚濁を抑制できるため、ダム貯水池Ｗによる水力発電を停止することなく、水力発電とともに浚渫作業を行うことができる。
Thus, the dredging device 10A of the first embodiment comprises a first housing 40 that is placed underwater and has a first pressure pump 42 arranged inside, and a second housing 50 that is placed above the first housing 40 and has a second pressure pump 52 arranged inside, and is provided with a first vacuum suction path 26 that connects the vacuum suction device 24 to the first housing 40, a second vacuum suction path 28 that connects the vacuum suction device 24 to the second housing 50, a first pressure passage 30 that connects the first pressure pump 42 to the second housing 50, and a second pressure passage 32 that connects the second pressure pump 52 to the second vacuum suction path 28.
Then, the vacuum suction device 24 sucks up the sediment D through the sediment suction pipe 14 and the first vacuum suction line 26 and transports it to the first housing 40, and then the sediment D in the first housing 40 is pressurized by the first pressure pump 42 through the first pressure transport line 30 to the second housing 50, and the sediment D in the second housing 50 is pressurized by the second pressure pump 52 through the second pressure transport line 32 to the second vacuum suction line 28, where it is transported to the recovery tank 20, thereby performing dredging work, which suppresses pollution of the working water area and is advantageous for recovering sediment D from deep water areas.
In other words, by using the airflow generated by the vacuum suction device 24 to suck up the excavated sediment D from the sediment suction pipe 14, the sediment D can be recovered before it clouds the water at the bottom B of the dam reservoir W, thereby preventing pollution, and by transporting the water in two stages using the first pressure pump 42 and the second pressure pump 52, the sediment D can be recovered even from the lift from near the bottom B of the dam reservoir W, where the water is deep, to the recovery tank 20 on land.
Furthermore, since the dredging work can prevent the water area at the bottom B of the dam reservoir W from becoming polluted, the dredging work can be carried out in conjunction with hydroelectric power generation without stopping the hydroelectric power generation by the dam reservoir W.
また、第２真空吸引路２８が第２筐体５０の上方で第１真空吸引路２６に接続され、第２真空吸引路２８の接続箇所から真空吸引装置２４までの第１真空吸引路２６が第２真空吸引路２８を兼ねた構成としたため、第１真空吸引路２６により第２筐体５０を介さずに第１筐体４０と真空吸引装置２４とを接続できるため、真空吸引装置２４による吸引力を高める上で有利となる。
また、ダム貯水池Ｗの水中の底部Ｂから第１筐体４０の下端までの高さ、第１筐体４０の下端から第２筐体５０の下端までの高さ、および第２筐体５０の下端から回収タンク２０の第１真空吸引路２６の接続位置までの高さをそれぞれ６ｍ～９ｍとして構成したため、第１圧送ポンプ４２および第２圧送ポンプ５２による搬送力の低下を抑制しながら水中の底部Ｂからの揚程を高くする上で有利となる。
また、第１筐体４０に第１筐体４０の内部に空気を供給する第１給気管４４を設け、第２筐体５０に第２筐体５０の内部に空気を供給する第２給気管５４を設けた構成としたため、真空吸引路２６、２８や圧送路３０、３２への圧力を調整することができ、堆積土砂Ｄの搬送力を高める上で有利となる。
Furthermore, the second vacuum suction path 28 is connected to the first vacuum suction path 26 above the second housing 50, and the first vacuum suction path 26 from the connection point of the second vacuum suction path 28 to the vacuum suction device 24 also serves as the second vacuum suction path 28. This means that the first vacuum suction path 26 can connect the first housing 40 and the vacuum suction device 24 without going through the second housing 50, which is advantageous in increasing the suction force of the vacuum suction device 24.
In addition, the height from the underwater bottom B of the dam reservoir W to the lower end of the first housing 40, the height from the lower end of the first housing 40 to the lower end of the second housing 50, and the height from the lower end of the second housing 50 to the connection position of the first vacuum suction path 26 of the recovery tank 20 are each set to 6m to 9m, which is advantageous in increasing the lift from the underwater bottom B while suppressing a decrease in the conveying force of the first pressure pump 42 and the second pressure pump 52.
Furthermore, since the first housing 40 is provided with a first air supply pipe 44 for supplying air to the interior of the first housing 40, and the second housing 50 is provided with a second air supply pipe 54 for supplying air to the interior of the second housing 50, the pressure on the vacuum suction paths 26, 28 and the pressure transport paths 30, 32 can be adjusted, which is advantageous in increasing the transport force of the deposited sediment D.
（第２実施形態）
第１実施形態の浚渫装置１０Ａでは、第２真空吸引路２８が第２筐体５０の上方で第１真空吸引路２６に接続されていたのに対して、第２実施形態の浚渫装置１０Ｂでは、第２真空吸引路が第２筐体に接続されている点が異なっている。
なお、以下の実施形態の説明では、第１実施形態と同様な個所、部材に同一の符号を付してその説明を省略し、第１実施形態と異なった個所について重点的に説明する。
Second Embodiment
In the first embodiment of the dredging device 10A, the second vacuum suction passage 28 was connected to the first vacuum suction passage 26 above the second housing 50, whereas in the second embodiment of the dredging device 10B, the second vacuum suction passage is connected to the second housing.
In the following description of the embodiment, the same parts and members as those in the first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted, and the description will focus on the parts that are different from the first embodiment.
図３に示すように、第１真空吸引路６６Ａは、真空吸引装置２４と第１筐体４０とを接続する真空吸引管により形成された吸引経路である。
本実施形態では、第２筐体５０は、第１真空吸引路６６Ａの途中に介設されている。このため、第１真空吸引路６６Ａは、第２筐体５０を含んで構成されている。
第２真空吸引路２８は、真空吸引装置２４と第２筐体５０とを接続する真空吸引管により形成された吸引経路である。
第２筐体５０から真空吸引装置２４までの第１真空吸引路６６Ａは、第２真空吸引路２８を兼ねている。
そして、第２真空吸引路２８を兼ねた第１真空吸引路６６Ａの途中に、回収タンク２０とフィルタ２２とが介設されている。
本実施形態の浚渫装置１０Ｂによる浚渫作業の流れおよび揚程については、第１実施形態と同様である。
As shown in FIG. 3, the first vacuum suction path 66A is a suction path formed by a vacuum suction pipe that connects the vacuum suction device 24 and the first housing 40.
In this embodiment, the second housing 50 is disposed midway along the first vacuum suction path 66 A. Therefore, the first vacuum suction path 66 A is configured to include the second housing 50 .
The second vacuum suction path 28 is a suction path formed by a vacuum suction pipe that connects the vacuum suction device 24 and the second housing 50 .
The first vacuum suction path 66A from the second housing 50 to the vacuum suction device 24 also serves as the second vacuum suction path 28 .
A recovery tank 20 and a filter 22 are interposed in the middle of the first vacuum suction path 66A, which also serves as the second vacuum suction path 28.
The flow of dredging work and lifting height by the dredging device 10B of this embodiment are the same as those of the first embodiment.
このように、第２実施形態によれば、第１実施形態と同様の効果を奏する。
また、第２筐体４０を第１真空吸引路６６の途中に介設して第１真空吸引路６６が第２筐体５０を含む構成としたため、浚渫装置１０Ｂを簡素に構成できるとともにコストを削減する上で有利となる。
したがって、第２筐体５０の上方で、第１真空吸引路６６、第２圧送路３２、および第２真空吸引路２８が近傍で合流することを回避でき、それぞれの経路を形成する真空吸引管や圧送管が絡まることを抑制できる。
In this way, the second embodiment provides the same effects as the first embodiment.
Furthermore, since the second housing 40 is interposed in the middle of the first vacuum suction path 66 so that the first vacuum suction path 66 includes the second housing 50, the dredging device 10B can be configured simply and is advantageous in terms of reducing costs.
Therefore, it is possible to prevent the first vacuum suction path 66, the second pressure delivery path 32, and the second vacuum suction path 28 from merging in the vicinity above the second housing 50, and it is possible to prevent the vacuum suction pipes and pressure delivery pipes that form each path from becoming tangled.
（第３実施形態）
第２実施形態の浚渫装置１０Ｂでは、第１中継ポンプユニット、第２中継ポンプユニットを備えて構成されていたのに対して、第３実施形態の浚渫装置１０Ｃでは、さらに第３中継ポンプユニットを備えて構成されている点が異なっている。
図４に示すように、浚渫装置１０Ｃは、さらに、第３中継ポンプユニット７０と、第３圧送路７２とを備えて構成されている。
(Third embodiment)
The dredging device 10B of the second embodiment is configured with a first relay pump unit and a second relay pump unit, whereas the dredging device 10C of the third embodiment is different in that it is further configured with a third relay pump unit.
As shown in FIG. 4, the dredging device 10C further includes a third relay pump unit 70 and a third pressure feed line 72.
第３中継ポンプユニット７０は、第３筐体８０と、第３圧送ポンプ８２と、第３給気管８４と、真空ゲージ８６とを備えて構成されている。
第３筐体８０は、直方体形状で水密に構成されており、第１筐体４０と第２筐体５０との間に配置されている。本実施形態の第２筐体５０および第３筐体８０は、ダム貯水池Ｗの水中に配置されており、第１筐体４０と同様に門型設備により吊り下げられていてもよいし、他の昇降装置により支持されていてもよい。また、第２筐体５０および第３筐体８０は、陸上に配置されていてもよい。
第３圧送ポンプ８２は、第３筐体８０の内部に配置されており、後述する第３圧送路７２により第３筐体８０内の堆積土砂Ｄを上方に向けて圧送する。
第３給気管８４は、第３筐体８０に設けられ、第３筐体８０の内部に空気を供給する。
具体的には、本実施形態の第３給気管８４は、一方の端部が第３筐体８０の上面に取り付けられ、第３筐体８０の上方に向けて延在した他方の端部が水上に位置しており、空気を取り入れられるよう設置されている。
第３給気管８４には、不図示のバルブが設けられており、当該バルブの開閉制御を行うことで第１真空吸引路６６および第３圧送路７２への圧力を調整することができ、第３筐体８０から第２筐体５０への堆積土砂Ｄの搬送力を高めることができる。
真空ゲージ８６は、第１筐体４０内の圧力（負圧）を測定する計器である。
The third relay pump unit 70 is configured to include a third housing 80 , a third pressure pump 82 , a third air supply pipe 84 , and a vacuum gauge 86 .
The third housing 80 is rectangular and watertight, and is disposed between the first housing 40 and the second housing 50. The second housing 50 and the third housing 80 of this embodiment are disposed underwater in the dam reservoir W, and may be suspended by a gate-type facility, similar to the first housing 40, or may be supported by another lifting device. The second housing 50 and the third housing 80 may also be disposed on land.
The third pressure pump 82 is disposed inside the third housing 80 and pressure-feeds the sediment D inside the third housing 80 upward through a third pressure path 72 described below.
The third air supply pipe 84 is provided in the third housing 80 and supplies air to the inside of the third housing 80 .
Specifically, in this embodiment, the third air intake pipe 84 has one end attached to the top surface of the third housing 80 and the other end extending upward from the third housing 80 and positioned above the water, so as to be able to take in air.
The third air supply pipe 84 is provided with a valve (not shown), and by controlling the opening and closing of this valve, the pressure to the first vacuum suction path 66 and the third pressure feed path 72 can be adjusted, thereby increasing the transport force of the deposited sediment D from the third housing 80 to the second housing 50.
The vacuum gauge 86 is an instrument that measures the pressure (negative pressure) inside the first housing 40 .
図４に示すように、第１真空吸引路６６Ｂは、真空吸引装置２４と第１筐体４０とを接続する真空吸引管により形成された吸引経路である。
本実施形態では、第２筐体５０と第３筐体８０は、第１真空吸引路６６Ｂの途中に介設されている。このため、第１真空吸引路６６Ｂは、第２筐体５０と第３筐体８０とを含んで構成されている。
第２真空吸引路２８は、第２実施形態と同様に、真空吸引装置２４と第２筐体５０とを接続する真空吸引管により形成された吸引経路であって、第２筐体５０から真空吸引装置２４までの第１真空吸引路６６Ｂは、第２真空吸引路２８を兼ねている。
そして、第２真空吸引路２８を兼ねた第１真空吸引路６６Ｂの途中に、回収タンク２０とフィルタ２２とが介設されている。
As shown in FIG. 4, the first vacuum suction path 66B is a suction path formed by a vacuum suction pipe that connects the vacuum suction device 24 and the first housing 40.
In this embodiment, the second housing 50 and the third housing 80 are interposed in the middle of the first vacuum suction path 66B. Therefore, the first vacuum suction path 66B is configured to include the second housing 50 and the third housing 80.
As in the second embodiment, the second vacuum suction path 28 is a suction path formed by a vacuum suction pipe connecting the vacuum suction device 24 and the second housing 50, and the first vacuum suction path 66B from the second housing 50 to the vacuum suction device 24 also serves as the second vacuum suction path 28.
A recovery tank 20 and a filter 22 are interposed in the middle of the first vacuum suction path 66B, which also serves as the second vacuum suction path 28.
第３圧送路７２は、第３圧送ポンプ８２と第２筐体５０とを接続する圧送管により形成された圧送経路であって、第３筐体８０内の堆積土砂Ｄを第２筐体５０に圧送する。
第１圧送路３０は、第２実施形態と同様に、第１圧送ポンプ４２と第２筐体５０とを接続する圧送管により形成された圧送経路であって、第１筐体４０内の堆積土砂Ｄを第２筐体５０に圧送する。
そして、本実施形態では、第１圧送路３０は、第１圧送ポンプ４２と第２筐体５０とを、第３圧送ポンプ８２と第３圧送路７２を介して接続して第１筐体４０内の堆積土砂Ｄを第２筐体５０に圧送する。
The third pressure-transfer path 72 is a pressure-transfer path formed by a pressure-transfer pipe connecting the third pressure-transfer pump 82 and the second housing 50, and pressurizes the accumulated sediment D in the third housing 80 to the second housing 50.
As in the second embodiment, the first pressure-transfer path 30 is a pressure-transfer path formed by a pressure-transfer pipe connecting the first pressure-transfer pump 42 and the second housing 50, and pressurizes the deposited sediment D in the first housing 40 to the second housing 50.
In this embodiment, the first pressure-transfer path 30 connects the first pressure-transfer pump 42 and the second housing 50 via the third pressure-transfer pump 82 and the third pressure-transfer path 72, and pressurizes the deposited sediment D in the first housing 40 to the second housing 50.
次に、本実施形態の浚渫装置１０Ｃによるダム貯水池Ｗの水中の底部Ｂから回収タンク２０までの堆積土砂Ｄの搬送および揚程について説明する。
本実施形態では、ダム貯水池Ｗの底部Ｂから第１筐体４０の下端までの高さｈ５、第１筐体４０の下端から第３筐体８０の下端までの高さｈ６、第３筐体８０の下端から第２筐体５０の下端までの高さｈ７、および第２筐体５０の下端から回収タンク２０の第１真空吸引路６６Ｂの接続位置までの高さｈ８は、それぞれ６ｍ～９ｍに設定している。
したがって、本実施形態では、ダム貯水池Ｗの底部Ｂから回収タンク２０までを６ｍ～９ｍごとに分けて、真空吸引装置２４および３つの圧送ポンプ４２、５２、８２によって堆積土砂Ｄを搬送することで、堆積土砂Ｄを回収タンク２０まで搬送させやすい構成となっている。
つまり、本実施形態の浚渫装置１０Ｃは、ダム貯水池Ｗの底部Ｂから回収タンク２０までの高さＨ２が２４ｍ～３６ｍの揚程である場合に適している。
Next, the transportation and lifting of sediment D from the underwater bottom B of the dam reservoir W to the recovery tank 20 by the dredging device 10C of this embodiment will be described.
In this embodiment, the height h5 from the bottom B of the dam reservoir W to the lower end of the first housing 40, the height h6 from the lower end of the first housing 40 to the lower end of the third housing 80, the height h7 from the lower end of the third housing 80 to the lower end of the second housing 50, and the height h8 from the lower end of the second housing 50 to the connection position of the first vacuum suction path 66B of the recovery tank 20 are each set to 6m to 9m.
Therefore, in this embodiment, the distance from the bottom B of the dam reservoir W to the recovery tank 20 is divided into 6 to 9 m intervals, and the sediment D is transported using a vacuum suction device 24 and three pressure pumps 42, 52, and 82, making it easy to transport the sediment D to the recovery tank 20.
In other words, the dredging device 10C of this embodiment is suitable when the height H2 from the bottom B of the dam reservoir W to the recovery tank 20 is a lift of 24 m to 36 m.
次に、本実施形態の浚渫装置１０Ｃの浚渫作業の流れについて説明する。
第１中継ポンプユニット１２、第２中継ポンプユニット１４、および第３中継ポンプユニット７０に真空吸引管および圧送管を接続することで、第１真空吸引路６６Ｂ、第２真空吸引路２８、第１圧送路３０、第２圧送路３２、第３圧送路７２を形成する。
真空吸引装置２４により土砂吸い込み管１４から吸引された堆積土砂Ｄは、第１筐体４０の内部に搬送され回収される。
次に、第１圧送ポンプ４２によって第１筐体４０の内部に回収された堆積土砂Ｄが圧送され、第１圧送路３０を通って第３筐体８０の内部に搬送され、堆積土砂Ｄが回収される。
堆積土砂Ｄが第３筐体８０に搬送されると、第３圧送ポンプ８２によって第３筐体８０の内部に回収された堆積土砂Ｄが圧送され、第３圧送路７２を通って第２筐体５０の内部に搬送され、堆積土砂Ｄが回収される。
堆積土砂Ｄが第２筐体５０に搬送されると、第２圧送ポンプ５２によって第２筐体５０の内部に回収された堆積土砂Ｄが圧送され、第２圧送路３２を通って第２真空吸引路２８に向けて搬送され、第２真空吸引路２８に合流する。そして、合流した堆積土砂Ｄは、真空吸引装置２４と第２圧送ポンプ５２とにより第２真空吸引路２８（第１真空吸引路６６Ｂ）を通って回収タンク２０に搬送される。
一方で、真空吸引装置２４によって第１筐体４０の内部に回収された堆積土砂Ｄの一部が、第１真空吸引路６６Ｂおよび第２真空吸引路３２を通って、回収タンク２０に搬送される。
すなわち、真空吸引装置２４によって吸引され搬送された堆積土砂Ｄと、第１圧送ポンプ４２、第２圧送ポンプ５２、および第３圧送ポンプ８２により圧送された堆積土砂Ｄは、第２圧送路３２と第２真空吸引路２８の接続箇所において合流し、回収タンク２０に回収される。
そして、回収タンク２０に回収された堆積土砂Ｄは、回収土砂処理設備３６に排出され、回収土砂処理設備３６により、個体と水とに分離され所定の処理が行われる。
Next, the flow of dredging work by the dredging device 10C of this embodiment will be described.
By connecting vacuum suction pipes and pressure transfer pipes to the first relay pump unit 12, the second relay pump unit 14, and the third relay pump unit 70, a first vacuum suction path 66B, a second vacuum suction path 28, a first pressure transfer path 30, a second pressure transfer path 32, and a third pressure transfer path 72 are formed.
The sediment D sucked from the sediment suction pipe 14 by the vacuum suction device 24 is transported to the inside of the first housing 40 and collected.
Next, the sediment D collected inside the first housing 40 is pressurized by the first pressure pump 42 and transported through the first pressure path 30 to the inside of the third housing 80, where the sediment D is collected.
When the sediment D is transported to the third housing 80, the sediment D collected inside the third housing 80 is pressurized by the third pressure pump 82, and transported through the third pressure path 72 to the inside of the second housing 50, where the sediment D is collected.
When the sediment D is transported to the second housing 50, the sediment D collected inside the second housing 50 is pumped by the second pressure pump 52 and transported through the second pressure path 32 toward the second vacuum suction path 28, where it merges with the second vacuum suction path 28. The merged sediment D is then transported by the vacuum suction device 24 and the second pressure pump 52 through the second vacuum suction path 28 (first vacuum suction path 66B) to the recovery tank 20.
Meanwhile, a portion of the sediment D recovered inside the first housing 40 by the vacuum suction device 24 is transported to the recovery tank 20 through the first vacuum suction path 66B and the second vacuum suction path 32 .
That is, the sediment D sucked and transported by the vacuum suction device 24 and the sediment D pressurized by the first pressure pump 42, the second pressure pump 52, and the third pressure pump 82 join together at the connection point between the second pressure line 32 and the second vacuum suction line 28 and are collected in the collection tank 20.
The sediment D collected in the collection tank 20 is then discharged to the collected sediment treatment facility 36, where it is separated into solids and water and subjected to the prescribed treatment.
このように、第３実施形態によれば、第１実施形態と同様の効果を奏する。
また、第１筐体４０と第２筐体５０の間に、第３圧送ポンプ８２を備えた第３筐体８０を配置し、第１筐体４０内の堆積土砂Ｄを第３筐体８０に圧送した後、第３筐体８０内の堆積土砂Ｄを第２筐体５０に圧送する構成としたため、堆積土砂の搬送力を維持しながら水中の底部Ｂからの揚程を高くする上で有利となる。
また、水中の底部Ｂから第１筐体４０の下端までの高さ、第１筐体４０の下端から第３筐体８０の下端までの高さ、第３筐体８０の下端から第２筐体５０の下端までの高さ、および第２筐体５０の下端から回収タンク２０の第１真空吸引路６６Ｂの接続位置までの高さをそれぞれ６ｍ～９ｍとして構成したため、第１圧送ポンプ３２、第２圧送ポンプ４２、および第３圧送ポンプ８２による搬送力の低下を抑制しながら水中の底部Ｂからの揚程を高くする上で有利となる。
また、第１筐体４０に第１筐体４０の内部に空気を供給する第１給気管４４を設け、第２筐体５０に第２筐体５０の内部に空気を供給する第２給気管５４を設け、第３筐体８０に第３筐体８０の内部に空気を供給する第３給気管８４を設けた構成としたため、真空吸引路や圧送路への圧力を調整することができ、堆積土砂Ｄの搬送力を高める上で有利となる。
In this way, the third embodiment provides the same effects as the first embodiment.
In addition, a third housing 80 equipped with a third pressure pump 82 is placed between the first housing 40 and the second housing 50, and the sediment D in the first housing 40 is pressure-fed to the third housing 80, and then the sediment D in the third housing 80 is pressure-fed to the second housing 50. This is advantageous in increasing the lift from the bottom B of the water while maintaining the transport force of the sediment.
In addition, the height from the underwater bottom B to the lower end of the first housing 40, the height from the lower end of the first housing 40 to the lower end of the third housing 80, the height from the lower end of the third housing 80 to the lower end of the second housing 50, and the height from the lower end of the second housing 50 to the connection position of the first vacuum suction path 66B of the recovery tank 20 are each set to 6m to 9m, which is advantageous in increasing the lift from the underwater bottom B while suppressing a decrease in the conveying force of the first pressure pump 32, the second pressure pump 42, and the third pressure pump 82.
Furthermore, since the first housing 40 is provided with a first air supply pipe 44 for supplying air to the interior of the first housing 40, the second housing 50 is provided with a second air supply pipe 54 for supplying air to the interior of the second housing 50, and the third housing 80 is provided with a third air supply pipe 84 for supplying air to the interior of the third housing 80, it is possible to adjust the pressure to the vacuum suction path and the pressure transport path, which is advantageous in increasing the transport force of the deposited sediment D.
上述した第３実施形態では、第１中継ポンプユニット１２と第２中継ポンプユニット１４との間に、一つの第３中継ポンプユニット８０を配置した構成としたが、第３中継ポンプユニットを複数配置する構成としてもよい。その場合、各筐体間の上下方向の高さ（揚程）は、６ｍ～９ｍに設定することが好ましい。
これにより、堆積土砂Ｄの搬送力を維持しながら水中の底部Ｂからの揚程をさらに高くする上で有利となる。
In the third embodiment described above, one third relay pump unit 80 is disposed between the first relay pump unit 12 and the second relay pump unit 14, but a configuration in which a plurality of third relay pump units are disposed may also be used. In this case, the vertical height (head) between the housings is preferably set to 6 m to 9 m.
This is advantageous in further increasing the lift height from the bottom B of the water while maintaining the transport force of the sediment D.
また、上記実施形態では、第２圧送路３２が第１真空吸引路２６（６６Ａ、６６Ｂ）に合流したのち、回収タンク２０に接続された構成となっているが、第２圧送路と第２真空吸引路とを別個に回収タンク２０に接続する構成としてもよい。しかし、本実施形態にように第２圧送路３２を第１真空吸引路６６Ｂに合流させた構成とすると、各種配管の配置が煩雑となることを回避でき、コストを削減できる。
また、上記実施形態では、単一の真空吸引装置２４が配置された構成となっているが、複数の真空吸引装置２４を配置した構成としてもよい。しかし、真空吸引装置２４は高価であるため、本実施形態のように、圧送ポンプを配置した中継ポンプユニットを複数設けて、所望の揚程における堆積土砂を搬送した方がコストを削減できる。
In addition, in the above embodiment, the second pressure feed path 32 is configured to merge with the first vacuum suction path 26 (66A, 66B) and then connected to the recovery tank 20, but the second pressure feed path and the second vacuum suction path may be configured to be connected separately to the recovery tank 20. However, if the second pressure feed path 32 is configured to merge with the first vacuum suction path 66B as in this embodiment, it is possible to avoid complex arrangement of various piping and reduce costs.
Furthermore, in the above embodiment, a single vacuum suction device 24 is provided, but a configuration may also be adopted in which multiple vacuum suction devices 24 are provided. However, because the vacuum suction device 24 is expensive, it is more cost-effective to provide multiple relay pump units each equipped with a pressure pump to transport the sediment at a desired head, as in the present embodiment.
１０Ａ、１０Ｂ、１０Ｃ 浚渫装置
１２ 第１中継ポンプユニット
１４ 土砂吸い込み管
１６ オーガ付き吸引機
１８ 第２中継ポンプユニット
２０ 回収タンク
２２ フィルタ
２４ 真空吸引装置
２６、６６Ａ、６６Ｂ 第１真空吸引路
２８ 第２真空吸引路
３０ 第１圧送路
３２ 第２圧送路
３４ 搬送ポンプ
３６ 回収土砂処理設備
４０ 第１筐体
４２ 第１圧送ポンプ
４４ 第１給気管
４６ 真空ゲージ
５０ 第２筐体
５２ 第２圧送ポンプ
５４ 第２給気管
５８ 真空ゲージ
７０ 第３中継ポンプユニット
７２ 第３圧送路
８０ 第３筐体
８２ 第３圧送ポンプ
８４ 第３給気管
８６ 真空ゲージ
９０ 台船
９２ 門型設備
10A, 10B, 10C Dredging equipment 12 First relay pump unit 14 Sediment suction pipe 16 Suction machine with auger 18 Second relay pump unit 20 Recovery tank 22 Filter 24 Vacuum suction device 26, 66A, 66B First vacuum suction line 28 Second vacuum suction line 30 First pressure feed line 32 Second pressure feed line 34 Conveying pump 36 Recovered sediment treatment equipment 40 First housing 42 First pressure feed pump 44 First air supply pipe 46 Vacuum gauge 50 Second housing 52 Second pressure feed pump 54 Second air supply pipe 58 Vacuum gauge 70 Third relay pump unit 72 Third pressure feed line 80 Third housing 82 Third pressure feed pump 84 Third air supply pipe 86 Vacuum gauge 90 Barge 92 Gate-type equipment
Claims (8)
水中に配置された第１筐体と、
前記第１筐体の内部に配置された第１圧送ポンプと、
前記第１筐体に設けられ、その先端が前記水中の底部に配置される土砂吸い込み管と、
前記第１筐体の上方に配置された第２筐体と、
前記第２筐体の内部に配置された第２圧送ポンプと、
水上に配置された真空吸引装置と、
前記真空吸引装置と前記第１筐体とを接続する第１真空吸引路と、
前記真空吸引装置と前記第２筐体とを接続する第２真空吸引路と、
前記第１圧送ポンプと前記第２筐体とを接続し、前記第１筐体内の堆積土砂を前記第２筐体に圧送する第１圧送路と、
前記第２圧送ポンプと前記第２真空吸引路とを接続し、前記第２筐体内の堆積土砂を前記第２真空吸引路に圧送する第２圧送路と、
を備えることを特徴とする浚渫装置。 A dredging device for recovering sediment deposited on the bottom of the water,
a first housing disposed underwater;
a first pressure pump disposed inside the first housing;
a sediment suction pipe provided in the first housing, the tip of which is disposed at the bottom of the water;
a second housing disposed above the first housing;
a second pressure pump disposed inside the second housing; and
a vacuum suction device disposed on the water;
a first vacuum suction path connecting the vacuum suction device and the first housing;
a second vacuum suction path connecting the vacuum suction device and the second housing;
a first pressure-feeding line connecting the first pressure-feeding pump and the second housing and pressure-feeding the sediment in the first housing to the second housing;
a second pressure-feeding path that connects the second pressure-feeding pump and the second vacuum suction path and pressure-feeds the sediment in the second housing to the second vacuum suction path;
A dredging device comprising:
前記第２真空吸引路は、前記第２筐体の上方で前記第１真空吸引路に接続され、
前記第２真空吸引路の接続箇所から前記真空吸引装置までの前記第１真空吸引路は、前記第２真空吸引路を兼ねている、
ことを特徴とする請求項１記載の浚渫装置。 The vacuum suction device is single,
the second vacuum suction path is connected to the first vacuum suction path above the second housing;
The first vacuum suction path from the connection point of the second vacuum suction path to the vacuum suction device also serves as the second vacuum suction path.
2. The dredging apparatus according to claim 1.
前記第２筐体は、前記第１真空吸引路の途中に介設されており、
前記第１真空吸引路は、前記第２筐体を含んで構成され、
前記第２筐体から前記真空吸引装置までの前記第１真空吸引路は、前記第２真空吸引路を兼ねている、
ことを特徴とする請求項１記載の浚渫装置。 The vacuum suction device is single,
the second housing is interposed in the middle of the first vacuum suction path,
the first vacuum suction path is configured to include the second housing,
the first vacuum suction path from the second housing to the vacuum suction device also serves as the second vacuum suction path;
2. The dredging apparatus according to claim 1.
前記第１筐体と前記第２筐体との間に少なくとも一つ配置された第３筐体と、
前記第３筐体の内部に配置された第３圧送ポンプと、
前記第３圧送ポンプと前記第２筐体とを接続し、前記第３筐体内の堆積土砂を前記第２筐体に圧送する第３圧送路と、をさらに備え、
前記第２筐体と前記第３筐体は、前記第１真空吸引路の途中に介設されており、
前記第１真空吸引路は、前記第２筐体と前記第３筐体とを含んで構成され、
前記第１圧送路は、前記第１圧送ポンプと前記第２筐体とを、前記第３圧送ポンプと前記第３圧送路を介して接続して前記第１筐体内の堆積土砂を前記第２筐体に圧送し、
前記第２筐体から前記真空吸引装置までの前記第１真空吸引路は、前記第２真空吸引路を兼ねている、
ことを特徴とする請求項１記載の浚渫装置。 The vacuum suction device is single,
At least one third housing is disposed between the first housing and the second housing;
a third pressure pump disposed inside the third housing; and
a third pressure-transfer line connecting the third pressure-transfer pump and the second housing and pumping the sediment in the third housing to the second housing,
the second housing and the third housing are interposed in the middle of the first vacuum suction path,
the first vacuum suction path is configured to include the second housing and the third housing,
the first pressure-feeding path connects the first pressure-feeding pump and the second housing via the third pressure-feeding pump and the third pressure-feeding path, and pumps the sediment in the first housing to the second housing;
the first vacuum suction path from the second housing to the vacuum suction device also serves as the second vacuum suction path;
2. The dredging apparatus according to claim 1.
前記水中の底部から前記第１筐体の下端までの高さ、前記第１筐体の下端から前記第２筐体の下端までの高さ、および前記第２筐体の下端から前記回収タンクの前記第１真空吸引路の接続位置までの高さは、それぞれ６ｍ～９ｍである、
ことを特徴とする請求項１～３記載の浚渫装置。 a recovery tank disposed on the water and interposed in the middle of the first vacuum suction path, for recovering sediment;
The height from the bottom of the water to the lower end of the first housing, the height from the lower end of the first housing to the lower end of the second housing, and the height from the lower end of the second housing to the connection position of the first vacuum suction path of the recovery tank are each 6 m to 9 m.
The dredging device according to any one of claims 1 to 3.
前記第２筐体に設けられ、前記第２筐体の内部に空気を供給する第２給気管と、をさらに備える、
ことを特徴とする請求項１～３記載の浚渫装置。 a first air supply pipe provided in the first housing and supplying air to an inside of the first housing;
a second air supply pipe provided in the second housing and supplying air to the inside of the second housing,
The dredging device according to any one of claims 1 to 3.
前記水中の底部から前記第１筐体の下端までの高さ、前記第１筐体の下端から前記第３筐体の下端までの高さ、前記第３筐体の下端から前記第２筐体の下端までの高さ、および前記第２筐体の下端から前記回収タンクの前記第１真空吸引路の接続位置までの高さは、それぞれ６ｍ～９ｍである、
ことを特徴とする請求項４記載の浚渫装置。 a recovery tank disposed on the water and interposed in the middle of the first vacuum suction path, for recovering sediment;
The height from the bottom of the water to the lower end of the first housing, the height from the lower end of the first housing to the lower end of the third housing, the height from the lower end of the third housing to the lower end of the second housing, and the height from the lower end of the second housing to the connection position of the first vacuum suction path of the recovery tank are each 6 m to 9 m.
5. The dredging apparatus according to claim 4.
前記第２筐体に設けられ、前記第２筐体の内部に空気を供給する第２給気管と、
前記第３筐体に設けられ、前記第３筐体の内部に空気を供給する第３給気管と、をさらに備えることを特徴とする請求項４記載の浚渫装置。 a first air supply pipe provided in the first housing and supplying air to an inside of the first housing;
a second air supply pipe provided in the second housing and supplying air to the inside of the second housing;
The dredging device according to claim 4, further comprising a third air supply pipe provided in the third housing and supplying air to the inside of the third housing.
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| JP2002235336A (en) | 2001-02-07 | 2002-08-23 | Maezawa Ind Inc | Sand-lifting method and sand-lifting device |
| US20140015302A1 (en) | 2011-01-21 | 2014-01-16 | Decomar S.P.A. | Apparatus and method for the dredging of sediments from the seabed |
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| JP2002235336A (en) | 2001-02-07 | 2002-08-23 | Maezawa Ind Inc | Sand-lifting method and sand-lifting device |
| US20140015302A1 (en) | 2011-01-21 | 2014-01-16 | Decomar S.P.A. | Apparatus and method for the dredging of sediments from the seabed |
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