JP5854822B2 - Sand transport equipment - Google Patents

Sand transport equipment Download PDF

Info

Publication number
JP5854822B2
JP5854822B2 JP2011282778A JP2011282778A JP5854822B2 JP 5854822 B2 JP5854822 B2 JP 5854822B2 JP 2011282778 A JP2011282778 A JP 2011282778A JP 2011282778 A JP2011282778 A JP 2011282778A JP 5854822 B2 JP5854822 B2 JP 5854822B2
Authority
JP
Japan
Prior art keywords
sand
suction transport
transport pipe
pipe
suction
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.)
Active
Application number
JP2011282778A
Other languages
Japanese (ja)
Other versions
JP2013132570A5 (en
JP2013132570A (en
Inventor
隆洋 鈴木
隆洋 鈴木
稔 新井
稔 新井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Swing Corp
Original Assignee
Swing Corp
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 Swing Corp filed Critical Swing Corp
Priority to JP2011282778A priority Critical patent/JP5854822B2/en
Publication of JP2013132570A publication Critical patent/JP2013132570A/en
Publication of JP2013132570A5 publication Critical patent/JP2013132570A5/ja
Application granted granted Critical
Publication of JP5854822B2 publication Critical patent/JP5854822B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20—Controlling water pollution; Waste water treatment
    • Y02A20/208—Off-grid powered water treatment

Landscapes

  • Sewage (AREA)

Description

本発明は、沈降性の固体を液体とともに効率的に吸引し、かつ輸送する揚砂輸送装置に係り、特に下水処理施設やし尿処理施設の沈砂池あるいは浄化槽汚泥中に堆積した沈砂（沈降性の砂）を真空吸引により液体とともに揚砂し、固液回収タンクに輸送する揚砂輸送装置に関するものである。   TECHNICAL FIELD The present invention relates to a sand transporting device that efficiently sucks and transports sedimentary solids together with a liquid, and particularly, sand sediment (sedimentable sediment) deposited in a sand basin or septic tank sludge of a sewage treatment facility or human waste treatment facility. The present invention relates to a sand transporting device that sands sand with a liquid by vacuum suction and transports it to a solid-liquid recovery tank.

下水処理施設やし尿処理施設などの沈砂池における揚砂輸送設備は、し渣、砂利、金属類の沈降物などを含み、かつ、強い臭気を発生する環境にある。したがって、沈砂を自動で、目詰まりなどの問題もなく、高揚程にて輸送距離も長く、省エネルギーで効率的かつ安全に除去することが求められてきた。このため、沈砂池から揚砂して固液回収タンクなどへ輸送し、洗浄し、固液分離する技術として、様々の方法が提案されてきた。   The sand transportation facilities in sand basins such as sewage treatment facilities and human waste treatment facilities contain sediment, gravel, metal deposits, etc., and are in an environment that generates strong odors. Accordingly, it has been demanded to remove sand sediment automatically, without problems such as clogging, with a high lift, a long transport distance, energy saving, efficient and safe removal. For this reason, various methods have been proposed as techniques for sanding from a sand basin, transporting to a solid-liquid recovery tank, washing, and solid-liquid separation.

従来、沈砂を揚砂輸送するには、サンドポンプを用いる方法や真空により吸引する方法が主に使用されてきた。しかしながら、サンドポンプを用いる方法では、沈砂中に混在する石片、金属片などによりブレードが破損したり、急速に磨耗することがある。また沈砂の輸送にはコンベアが使用される場合があるが、コンベアをカバーで覆っても臭気が漏洩したり、汚水が飛散するなどの、気密性が保てないことなどの維持管理上の問題があった。   Conventionally, in order to transport sand by sand transport, a method using a sand pump or a method of suctioning by vacuum has been mainly used. However, in the method using the sand pump, the blade may be damaged or rapidly worn by stone pieces, metal pieces, etc. mixed in the settling sand. In addition, conveyors are sometimes used for transporting sand settling, but maintenance problems such as odor leaking and sewage splashing cannot be maintained even if the conveyor is covered with a cover. was there.

特許文献１には、真空装置により沈砂と水とを含む固液混合体を吸引輸送管内に吸引し、吸引した固液混合体の下方を大気開放することで輸送用水柱を形成し、大気圧と真空度との差により、輸送用水柱を固液回収タンクまで輸送する技術が開示されている。しかしながら、このような配管輸送方式は、従来のコンベアによる搬送と異なり、吸引輸送管の口径よりも大きなサイズの沈砂は輸送することができない。そのため、吸引輸送管の口径よりも大きなサイズの沈砂は、沈砂池内に徐々に溜まり、最終的には吸引輸送管の吸引口を塞いでしまう。   In Patent Document 1, a solid-liquid mixture containing sand and water is sucked into a suction transport pipe by a vacuum device, and a water column for transport is formed by opening the lower portion of the sucked solid-liquid mixture to the atmosphere. And a technique for transporting a water column for transportation to a solid-liquid recovery tank based on the difference between the degree of vacuum and the degree of vacuum. However, such a pipe transport system cannot transport sand having a size larger than the diameter of the suction transport pipe unlike the transport by the conventional conveyor. For this reason, sand having a size larger than the diameter of the suction transport pipe gradually accumulates in the sand basin and eventually closes the suction port of the suction transport pipe.

このような問題を解決するためには、吸引輸送管の口径を大きくすることが考えられる。しかしながら、吸引輸送管の口径が大きいほど、吸引する固液混合体の量も多くなるため、使用する動力や配管敷設コストが増えてしまう。したがって、現実的には口径を８０ｍｍから１００ｍｍ程度とした吸引輸送管が多く採用されてきた。   In order to solve such a problem, it is conceivable to increase the diameter of the suction transport pipe. However, the larger the diameter of the suction transport pipe, the larger the amount of the solid-liquid mixture to be sucked, so that the power to be used and the piping laying cost increase. Therefore, in reality, many suction transport pipes having a diameter of about 80 mm to 100 mm have been adopted.

特開２００８−３００２１号公報Japanese Patent Laid-Open No. 2008-30021 特開２００９−１６１９４６号公報JP 2009-161946 A

本発明は、上述した従来技術の問題点に鑑みてなされたもので、使用する動力や配管敷設コストを増やすことなく、大きなサイズの沈砂を沈砂池から引き上げることができ、吸引口の閉塞を防ぐことができる揚砂輸送装置を提供することを目的とする。   The present invention has been made in view of the above-mentioned problems of the prior art, and can increase the size of the settling sand from the settling basin without increasing the power to use and the piping laying cost, thereby preventing the suction port from being blocked. An object of the present invention is to provide a sand transporting device capable of transporting sand.

本発明の一態様は、固液回収タンクと、沈砂池の水中に没される開口部を有する第１の吸引輸送管と、前記第１の吸引輸送管に接続された第２の吸引輸送管と、一端部が前記第２の吸引輸送管に接続され、他端部が前記固液回収タンクに接続された第３の吸引輸送管と、前記固液回収タンク、前記第１の吸引輸送管、前記第２の吸引輸送管、および前記第３の吸引輸送管の内部を減圧する減圧装置と、前記沈砂池の最高水位よりも上方の位置で前記第１の吸引輸送管に接続された大気開放管と、前記大気開放管を通じて前記第１の吸引輸送管の前記大気開放管との接続部を大気開放するための大気開放弁と、前記大気開放弁を閉じて前記沈砂池に堆積した沈砂を水とともに固液混合体として前記第１の吸引輸送管内に吸引し、その水位が前記大気開放管との接続部よりも上方に上昇したときに前記大気開放弁を開くことにより前記接続部よりも上方に輸送用水柱を形成し、前記輸送用水柱に作用する大気圧と前記固液回収タンクの真空度との差により前記輸送用水柱を前記固液回収タンクに輸送し、前記輸送用水柱の全体が前記固液回収タンクに入る直前に前記大気開放弁を閉じ、前記大気開放弁の開閉を繰り返すことにより前記輸送用水柱の形成と輸送とを繰り返す制御部とを備え、前記第１の吸引輸送管は、前記第３の吸引輸送管の口径よりも大きい口径を有し、前記第２の吸引輸送管は、前記第１の吸引輸送管の口径と同じ又はそれよりも大きい口径を有する沈砂堆積部と、前記沈砂堆積部の下流側に配置された漸縮管とを有し、前記沈砂堆積部は、複数のエルボ管と複数の横引き配管とにより渦巻き状に構成されていることを特徴とする。 One aspect of the present invention is a solid-liquid recovery tank, a first suction transport pipe having an opening that is submerged in a sand basin, and a second suction transport pipe connected to the first suction transport pipe. A third suction transport pipe having one end connected to the second suction transport pipe and the other end connected to the solid-liquid recovery tank, the solid-liquid recovery tank, and the first suction transport pipe , A decompression device for depressurizing the inside of the second suction transport pipe and the third suction transport pipe, and an atmosphere connected to the first suction transport pipe at a position above the highest water level of the sand basin An air release valve for releasing the connection between the open pipe and the air release pipe of the first suction transport pipe through the air release pipe, and sand settling in the sand basin by closing the air release valve And a water-solid mixture as a solid-liquid mixture into the first suction transport pipe, and the water level is Opening the atmosphere release valve when rising above the connection with the air release pipe forms a transport water column above the connection, and the atmospheric pressure acting on the transport water column and the solid liquid The transport water column is transported to the solid-liquid recovery tank due to a difference from the degree of vacuum of the recovery tank, and the air release valve is closed immediately before the entire transport water column enters the solid-liquid recovery tank. A controller that repeats the formation and transportation of the water column for transportation by repeating opening and closing of the first suction transport pipe, the first suction transport pipe has a diameter larger than the diameter of the third suction transport pipe, the second suction transport tube, possess a sand deposition unit having the same or greater diameter than the diameter of the first suction transport tube, and a Utatechijimi tube disposed downstream of the sand settling sedimentary section The sand sedimentation portion includes a plurality of elbow pipes and a plurality of elbow pipes. Characterized in that it is configured in a spiral shape by the pulling pipe.

本発明の他の態様は、固液回収タンクと、沈砂池の水中に没される開口部を有する第１の吸引輸送管と、前記第１の吸引輸送管に接続された第２の吸引輸送管と、一端部が前記第２の吸引輸送管に接続され、他端部が前記固液回収タンクに接続された第３の吸引輸送管と、前記固液回収タンク、前記第１の吸引輸送管、前記第２の吸引輸送管、および前記第３の吸引輸送管の内部を減圧する減圧装置と、前記沈砂池の最高水位よりも上方の位置で前記第１の吸引輸送管に接続された大気開放管と、前記大気開放管を通じて前記第１の吸引輸送管の大気開放管との接続部を大気開放するための大気開放弁と、前記第１の吸引輸送管に接続された空気注入管と、前記第１の吸引輸送管の内部に空気を送り込む空気移送装置と、前記空気注入管を通じて前記空気移送装置によって前記第１の吸引輸送管の前記空気注入管との接続部から空気を前記吸引輸送管の内部に注入するための空気注入弁と、前記大気開放弁および前記空気注入弁を閉じて前記沈砂池に堆積した沈砂を水とともに固液混合体として前記第１の吸引輸送管内に吸引し、その水位が前記沈砂池の水位よりも上方に上昇したときに前記空気注入弁を開くことにより前記空気注入管との接続部より上方の固液混合体を上方に押し上げ、前記大気開放弁を開くとともに前記空気注入弁を閉じることにより前記大気開放管との接続部よりも上方に輸送用水柱を形成し、前記輸送用水柱に作用する大気圧と前記固液回収タンクの真空度との差により前記輸送用水柱を前記固液回収タンクに輸送し、前記輸送用水柱の全体が前記固液回収タンクに入る直前に前記大気開放弁を閉じ、前記大気開放弁および前記空気注入弁の開閉を繰り返すことにより前記輸送用水柱の形成と輸送とを繰り返す制御部とを備え、前記第１の吸引輸送管は、前記第３の吸引輸送管の口径よりも大きい口径を有し、前記第２の吸引輸送管は、前記第１の吸引輸送管の口径と同じ又はそれよりも大きい口径を有する沈砂堆積部と、前記沈砂堆積部の下流側に配置された漸縮管とを有し、前記沈砂堆積部は、複数のエルボ管と複数の横引き配管とにより渦巻き状に構成されていることを特徴とする。 Another aspect of the present invention includes a solid-liquid recovery tank, a first suction transport pipe having an opening that is submerged in a sand basin, and a second suction transport connected to the first suction transport pipe. A tube, a third suction transport pipe having one end connected to the second suction transport pipe and the other end connected to the solid-liquid recovery tank, the solid-liquid recovery tank, and the first suction transport A decompressor for decompressing the inside of the pipe, the second suction transport pipe, and the third suction transport pipe, and connected to the first suction transport pipe at a position above the highest water level of the sand basin An atmosphere release valve for opening the connection between the atmosphere release pipe and the atmosphere release pipe of the first suction transport pipe through the atmosphere release pipe, and an air injection pipe connected to the first suction transport pipe An air transfer device for sending air into the first suction transport pipe, and the air injection pipe. An air injection valve for injecting air into the inside of the suction transport pipe from the connection portion of the first suction transport pipe with the air injection pipe by the air transfer device, the air release valve, and the air injection valve Is closed and sucked into the first suction transport pipe as a solid-liquid mixture with water, and when the water level rises above the water level of the sand basin, the air injection valve is Opening the solid-liquid mixture above the connection with the air injection pipe by opening it up, opening the atmosphere release valve and closing the air injection valve above the connection with the atmosphere release pipe A transport water column is formed, and the transport water column is transported to the solid-liquid recovery tank due to a difference between an atmospheric pressure acting on the transport water column and a vacuum degree of the solid-liquid recovery tank, and the entire transport water column is Said solid-liquid times A controller that closes the atmosphere release valve just before entering the tank and repeats the opening and closing of the atmosphere release valve and the air injection valve to repeat the formation and transportation of the water column for transportation, and the first suction transportation The pipe has a diameter larger than the diameter of the third suction transport pipe, and the second suction transport pipe has a diameter equal to or larger than the diameter of the first suction transport pipe. features and parts, said possess a sand deposition portion Utatechijimi tube disposed downstream of the sand settling deposition unit is configured in a spiral shape by a plurality of elbow and a plurality of crosscut pipe And

本発明の好ましい態様は、前記第１の吸引輸送管の口径は、前記第３の吸引輸送管の口径の１．５〜２．５倍であることを特徴とする。
本発明の好ましい態様は、前記沈砂堆積部は、水平方向に延びることを特徴とする。
本発明の好ましい態様は、前記第２の吸引輸送管と前記第３の吸引輸送管との間には、前記第３の吸引輸送管の口径よりも小さい内径を有するオリフィスが配置されていることを特徴とする。 In a preferred aspect of the present invention, the diameter of the first suction transport pipe is 1.5 to 2.5 times the diameter of the third suction transport pipe.
In a preferred aspect of the present invention, the sand sedimentation portion extends in the horizontal direction.
In a preferred aspect of the present invention, an orifice having an inner diameter smaller than the diameter of the third suction transport pipe is disposed between the second suction transport pipe and the third suction transport pipe. It is characterized by.

本発明の好ましい態様は、前記沈砂堆積部の容積は、前記第３の吸引輸送管の断面積に該第３の吸引輸送管の長さ２ｍ〜１０ｍ分を乗じて得られる容積に等しいことを特徴とする。
本発明の好ましい態様は、前記沈砂堆積部は、堆積した沈砂を除去するためのハンドホールを備えたことを特徴とする。
本発明の好ましい態様は、前記沈砂堆積部には、堆積した沈砂を除去するための自動沈砂除去装置が接続されていることを特徴とする。 In a preferred aspect of the present invention, the volume of the sedimentation portion is equal to a volume obtained by multiplying a cross-sectional area of the third suction transport pipe by a length of 2 m to 10 m of the third suction transport pipe. Features.
In a preferred aspect of the present invention, the sand settling part is provided with a hand hole for removing the settling sand.
In a preferred aspect of the present invention, an automatic sand settling device for removing accumulated sand settling is connected to the sand settling unit.

本発明の好ましい態様は、前記沈砂堆積部内の沈砂堆積量を検出する沈砂堆積量検出器をさらに備えたことを特徴とする。
本発明の好ましい態様は、前記沈砂堆積量検出器は、前記第２の吸引輸送管の入口圧力と出口圧力との差から沈砂堆積量を検出することを特徴とする。
本発明の好ましい態様は、前記第３の吸引輸送管から分岐し、前記沈砂池の内部まで延びる第４の吸引輸送管をさらに備えたことを特徴とする。
本発明の他の態様は、沈砂池に堆積した沈砂を真空吸引により液体とともに揚砂し、回収するための揚砂輸送装置において、前記沈砂池内の水中に一端部が没された第１の吸引輸送管と、前記第１の吸引輸送管の他端部に接続され、複数のエルボ管および複数の横引き配管により渦巻き状に構成された第２の吸引輸送管と、一端部が前記第２の吸引輸送管に接続された第３の吸引輸送管と、前記第３の吸引輸送管の他端部に接続された固液回収タンクと、前記固液回収タンクに接続された真空装置と、を備え、前記第１の吸引輸送管は、前記第３の吸引輸送管の口径よりも大きい口径を有していることを特徴とする。 In a preferred aspect of the present invention, a sedimentation amount detector for detecting a sedimentation amount in the sedimentation part is further provided.
In a preferred aspect of the present invention, the sedimentation amount detector detects the sedimentation amount from the difference between the inlet pressure and the outlet pressure of the second suction transport pipe.
A preferred aspect of the present invention is characterized by further comprising a fourth suction transport pipe branched from the third suction transport pipe and extending to the inside of the sand basin.
According to another aspect of the present invention, there is provided a sand transporting apparatus for lifting and recovering sand collected in a sand basin together with a liquid by vacuum suction, wherein the first suction is submerged in water in the sand basin. and transport tube, which is connected to the other end of the first suction transport tube, and a second suction transport tube configured more spirally plurality of elbow pipe and a plurality of lateral pulling piping, one end the a third suction transport tube connected to the second suction transport tube, said third suction and the solid-liquid collecting tank connected to the other end of the transport tube, a vacuum device connected to said solid-liquid recovery tank The first suction transport pipe has a diameter larger than that of the third suction transport pipe .

なお、本明細書で使用する真空度とは、大気圧を０ｋＰａとし、負圧はそのまま、マイナス表示で表す。例えば−４９．０ｋＰａ（−５ｍＡｑ）とは大気圧を０ｋＰａとして、それより４９．０ｋＰａ低下したことを意味する。さらに、真空度が高いとは負圧が大きいこと、真空度が低いとは負圧が小さいことを意味する。   The degree of vacuum used in the present specification is represented by minus display with the atmospheric pressure set to 0 kPa and the negative pressure as it is. For example, −49.0 kPa (−5 mAq) means that the atmospheric pressure is set to 0 kPa and the pressure is lowered by 49.0 kPa. Further, a high vacuum means that the negative pressure is large, and a low vacuum means that the negative pressure is small.

本発明によれば、沈砂池内の大型の沈砂を大口径の第１の吸引輸送管を通じて引き上げることができるので、大型の沈砂が沈砂池内に残留することを防止することができる。その結果、第１の吸引輸送管の開口部（吸引口）の閉塞を防ぐことができる。さらに、大型の沈砂は漸縮管に捕捉され、沈砂堆積部に堆積するので、下流側の第３の吸引輸送管には大型の沈砂が流入することはない。したがって、第３の吸引輸送管として通常口径の輸送管を使用することができ、使用する動力や配管敷設コストを下げることができる。   According to the present invention, since the large sediment in the sand basin can be pulled up through the first suction transport pipe having a large diameter, the large sediment can be prevented from remaining in the sand basin. As a result, it is possible to prevent the opening (suction port) of the first suction transport pipe from being blocked. Furthermore, since the large-sized sedimentation is captured by the gradually reducing pipe and accumulated in the sedimentation accumulation section, the large-scale sedimentation does not flow into the third suction transport pipe on the downstream side. Therefore, a normal diameter transport pipe can be used as the third suction transport pipe, and the power used and the piping laying cost can be reduced.

本発明の第１の実施形態における揚砂輸送装置の構成を示す模式図である。It is a schematic diagram which shows the structure of the sand transporting apparatus in the 1st Embodiment of this invention. 図１の沈砂堆積部の拡大斜視図である。FIG. 2 is an enlarged perspective view of a sand sedimentation portion in FIG. 1. 図１のレジューサー近傍の構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows the structure of the reducer vicinity of FIG. 図１の揚砂輸送装置の動作を示す模式図である。It is a schematic diagram which shows operation | movement of the sand transport apparatus of FIG. 図１の揚砂輸送装置の動作を示す模式図である。It is a schematic diagram which shows operation | movement of the sand transport apparatus of FIG. 図１の大口径の吸引輸送管に圧力センサと差圧検出器とを備えた揚砂輸送装置を示す模式図である。It is a schematic diagram which shows the sand transporting apparatus provided with the pressure sensor and the differential pressure detector in the suction transport pipe of the large diameter of FIG. 図１の沈砂堆積部の近傍に圧力センサと差圧検出器とを備えた揚砂輸送装置を示す模式図である。It is a schematic diagram which shows the sand transport apparatus provided with the pressure sensor and the differential pressure detector in the vicinity of the sand sedimentation part of FIG. 図１の揚砂輸送装置の動作を示す模式図である。It is a schematic diagram which shows operation | movement of the sand transport apparatus of FIG. 図１の固液回収タンクの近傍に圧力センサを備えた揚砂輸送装置を示す模式図である。It is a schematic diagram which shows the sand transporting apparatus provided with the pressure sensor in the vicinity of the solid-liquid collection | recovery tank of FIG. 本発明の第２の実施形態における揚砂輸送装置の構成を示す模式図である。It is a schematic diagram which shows the structure of the sand transporting apparatus in the 2nd Embodiment of this invention. 本発明の第２の実施形態における揚砂輸送装置の動作を示す模式図である。It is a schematic diagram which shows operation | movement of the sand transporting apparatus in the 2nd Embodiment of this invention. 本発明の第２の実施形態における揚砂輸送装置の動作を示す模式図である。It is a schematic diagram which shows operation | movement of the sand transporting apparatus in the 2nd Embodiment of this invention. 本発明の第２の実施形態における揚砂輸送装置の動作を示す模式図である。It is a schematic diagram which shows operation | movement of the sand transporting apparatus in the 2nd Embodiment of this invention. 本発明の第３の実施形態における揚砂輸送装置の構成を示す模式図である。It is a schematic diagram which shows the structure of the sand transporting apparatus in the 3rd Embodiment of this invention.

以下、本発明に係る揚砂輸送装置の実施形態について図１から図１４を参照して詳細に説明する。なお、図１から図１４において、同一または相当する構成要素には、同一の符号を付して重複した説明を省略する。   Hereinafter, an embodiment of a sand transporting apparatus according to the present invention will be described in detail with reference to FIGS. 1 to 14, the same or corresponding components are denoted by the same reference numerals, and redundant description is omitted.

図１は、本発明の第１の実施形態における揚砂輸送装置の構成を示す模式図である。図１に示すように、この揚砂輸送装置は、沈砂池１内の水中に一端部（開口部）２ａが没された大口径の第１の吸引輸送管２と、第１の吸引輸送管２の他端部に接続された第２の吸引輸送管５と、一端部６ａが第２の吸引輸送管５に接続された通常口径の第３の吸引輸送管６と、第３の吸引輸送管６の他端部６ｂに接続された固液回収タンク１０と、固液回収タンク１０に接続された真空装置（減圧装置）１２とを備えている。固液回収タンク１０の下部には、固液回収タンク１０に回収された沈砂（沈降性の砂）を排出するための沈砂排出弁１０ａが設けられている。   FIG. 1 is a schematic diagram showing the configuration of the sand transporting apparatus according to the first embodiment of the present invention. As shown in FIG. 1, the sand transporting apparatus includes a first suction transport pipe 2 having a large diameter in which one end (opening) 2a is submerged in water in a sand basin 1, and a first suction transport pipe. 2, a second suction transport pipe 5 connected to the other end of the second end, a third suction transport pipe 6 with one end 6 a connected to the second suction transport pipe 5, and a third suction transport A solid-liquid recovery tank 10 connected to the other end 6 b of the pipe 6 and a vacuum device (decompression device) 12 connected to the solid-liquid recovery tank 10 are provided. Below the solid-liquid recovery tank 10, there is provided a sand settling discharge valve 10 a for discharging the settling sand (sedimentable sand) collected in the solid-liquid collection tank 10.

吸引輸送管５は、吸引輸送管６よりも口径の大きい沈砂堆積部５Ａと、この沈砂堆積部５Ａの下流側に配置されたレジューサー５Ｂとを有している。吸引輸送管２は、吸引輸送管６の口径よりも大きな口径を有している。具体的には、吸引輸送管２の口径は、吸引輸送管６の口径の１．５〜２．５倍である。吸引輸送管２と沈砂堆積部５Ａは同じ口径を有している。一例として、吸引輸送管２の口径が１２５ｍｍであるとき、沈砂堆積部５Ａの口径は１２５ｍｍ、吸引輸送管６の口径は８０ｍｍである。別の例としては、吸引輸送管２の口径が１５０ｍｍであるとき、沈砂堆積部５Ａの口径は１５０ｍｍ、吸引輸送管６の口径は１００ｍｍである。沈砂堆積量を増やすために、沈砂堆積部５Ａの口径は吸引輸送管２の口径よりも大きくてもよく、および／または沈砂堆積部５Ａは、その一部が拡大した拡大部を有してもよい。固液回収タンク１０は、一般に、沈砂池１よりも上方に位置しており、揚砂輸送装置は、沈砂池１内に堆積した沈砂を水とともに固液回収タンク１０に揚砂輸送できるようになっている。なお、沈砂池１の池底に堆積した沈砂は、砂以外に小石等の土砂やし渣を含むものである。   The suction transport pipe 5 includes a sand settling part 5A having a larger diameter than the suction transport pipe 6 and a reducer 5B disposed on the downstream side of the sand settling part 5A. The suction transport pipe 2 has a larger diameter than that of the suction transport pipe 6. Specifically, the diameter of the suction transport pipe 2 is 1.5 to 2.5 times the diameter of the suction transport pipe 6. The suction transport pipe 2 and the sand settling part 5A have the same diameter. As an example, when the diameter of the suction transport pipe 2 is 125 mm, the diameter of the sand settling part 5A is 125 mm, and the diameter of the suction transport pipe 6 is 80 mm. As another example, when the diameter of the suction transport pipe 2 is 150 mm, the diameter of the sand settling part 5A is 150 mm, and the diameter of the suction transport pipe 6 is 100 mm. In order to increase the amount of sedimentation, the diameter of the sedimentation part 5A may be larger than the diameter of the suction transport pipe 2 and / or the sedimentation part 5A may have an enlarged part partially enlarged. Good. The solid-liquid recovery tank 10 is generally located above the sand basin 1 so that the sand transporting device can transport the sand accumulated in the sand basin 1 to the solid-liquid recovery tank 10 together with water. It has become. In addition, the sedimentation sediment deposited on the bottom of the sedimentation basin 1 includes earth and sand such as pebbles and sand residue in addition to the sand.

吸引輸送管２には、大気開放弁１５が設けられた大気開放管１６が接続されている。この大気開放管１６は、沈砂池１の最高水位ＨＷＬよりも若干（１００ｍｍ〜１０００ｍｍ）上方に位置する接続部１６ａで吸引輸送管２に接続されている。大気開放管１６に取り付けられた大気開放弁１５を開くと、吸引輸送管２の大気開放管１６との接続部１６ａが大気開放されるようになっている。この大気開放弁１５には制御部２０が接続されており、この制御部２０によって大気開放弁１５の開閉が制御される。   An air release pipe 16 provided with an air release valve 15 is connected to the suction transport pipe 2. The air release pipe 16 is connected to the suction transport pipe 2 at a connection portion 16 a located slightly (100 mm to 1000 mm) above the highest water level HWL of the sand basin 1. When the atmosphere release valve 15 attached to the atmosphere release pipe 16 is opened, the connection portion 16a of the suction transport pipe 2 to the atmosphere release pipe 16 is opened to the atmosphere. A controller 20 is connected to the atmosphere release valve 15, and the opening and closing of the atmosphere release valve 15 is controlled by the controller 20.

また、吸引輸送管２の開口部（吸引口）２ａの近傍には、水を噴射する複数の水噴射ノズル２２が設けられており、この水噴射ノズル２２からの水の噴射により沈砂が流動化し、吸引輸送管２の開口部２ａの近傍に集砂されるようになっている。また、沈砂池１の底部の構造も集砂しやすいように傾斜を有している。   A plurality of water injection nozzles 22 for injecting water are provided in the vicinity of the opening (suction port) 2 a of the suction transport pipe 2. The sand is collected near the opening 2a of the suction transport pipe 2. In addition, the structure of the bottom of the sand basin 1 is also inclined to facilitate sand collection.

上述したように、大きな沈砂が沈砂池１内に増えていくと、いずれ吸引輸送管２の開口部２ａは閉塞してしまう。そこで、本実施形態では、大小様々なサイズの沈砂を水とともに吸引輸送管２を通じて沈砂池１から引き上げ、沈砂堆積部５Ａに送り込むようになっている。沈砂堆積部５Ａは沈砂池１のフロア面（ＦＬ）に設置されている。この沈砂堆積部５Ａは、固液混合体に含まれる沈砂の一部を一時的に内部に溜め、後に送られてくる輸送用水柱に沈砂堆積部５Ａ内に溜められた沈砂を取り込ませ、水と沈砂とが混合された輸送用水柱を再形成しながら、固液回収タンク１０に送り込むように構成されている。   As described above, when large amount of sedimentation increases in the sedimentation basin 1, the opening 2a of the suction transport pipe 2 will eventually be blocked. Therefore, in this embodiment, the large and small sizes of sand are picked up together with water from the sand settling basin 1 through the suction transport pipe 2 and sent to the sand settling portion 5A. The sand settling part 5A is installed on the floor surface (FL) of the sand settling basin 1. The sand sedimentation portion 5A temporarily stores a part of the sand contained in the solid-liquid mixture, and causes the transported water column to be sent later to take the sand collected in the sand sediment accumulation portion 5A and It is configured to feed the solid-liquid recovery tank 10 while reforming the water column for transportation in which the sand and sand are mixed.

沈砂池１のフロア面には、図２に示すように、エルボ管５ｂ，５ｃ，５ｄと横引き配管５ｅ，５ｆ，５ｇからなる沈砂堆積部５Ａが設けられている。沈砂堆積部５Ａは、水平方向に延びている。沈砂堆積部５Ａの入口は、エルボ管５ａを介して吸引輸送管２に連結されている。沈砂堆積部５Ａの出口は上を向いており、レジューサー５Ｂに接続されている。レジューサー５Ｂは、その口径が徐々に減小する形状を有する漸縮管である。レジューサー５Ｂの入口の口径は、吸引輸送管２の口径と同じであり、出口の口径は吸引輸送管６の口径と同じとなっている。レジューサー５Ｂは鉛直方向に延びており、その出口は吸引輸送管６に継手２５を介して接続されている。吸引輸送管２は、沈砂池１から吸引輸送管５まで延びており、吸引輸送管６は、吸引輸送管５から固液回収タンク１０まで延びている。   On the floor surface of the sand settling basin 1, as shown in FIG. 2, a sand settling portion 5A including elbow pipes 5b, 5c, 5d and horizontal pipes 5e, 5f, 5g is provided. The sand settling part 5A extends in the horizontal direction. The inlet of the sand settling part 5A is connected to the suction transport pipe 2 via an elbow pipe 5a. The exit of the sand settling part 5A faces upward and is connected to the reducer 5B. The reducer 5B is a gradually reducing tube having a shape in which the diameter gradually decreases. The diameter of the inlet of the reducer 5B is the same as the diameter of the suction transport pipe 2, and the diameter of the outlet is the same as the diameter of the suction transport pipe 6. The reducer 5 </ b> B extends in the vertical direction, and its outlet is connected to the suction transport pipe 6 via a joint 25. The suction transport pipe 2 extends from the sedimentation basin 1 to the suction transport pipe 5, and the suction transport pipe 6 extends from the suction transport pipe 5 to the solid-liquid recovery tank 10.

本実施形態に係る吸引輸送管５は、上記複数のエルボ管５ａ〜５ｄと複数の横引き配管５ｅ〜５ｇとにより渦巻き状に構成されている。これは特許文献１及び２に示すように、揚砂輸送管が横引き配管と鉛直配管とから構成される場合、揚砂輸送装置全体が大きくなってしまい、結果として配管敷設コストが増大してしまうためである。そのため、吸引輸送管５は場所をとらない形状にすることが好ましい。そうすることで、配管敷設コストを増やすことなく、大きなサイズの沈砂を輸送することができる。   The suction transport pipe 5 according to the present embodiment is formed in a spiral shape by the plurality of elbow pipes 5a to 5d and the plurality of horizontal pulling pipes 5e to 5g. This is because, as shown in Patent Documents 1 and 2, when the sand transporting pipe is composed of a horizontal pipe and a vertical pipe, the entire sand transporting apparatus becomes large, resulting in an increase in piping laying cost. It is because it ends. Therefore, it is preferable that the suction transport pipe 5 has a shape that does not take up space. By doing so, it is possible to transport a large size of sand without increasing the piping laying cost.

沈砂堆積部５Ａの容積は、吸引輸送管６の断面積に吸引輸送管６の長さ２ｍ〜１０ｍ分を乗じた容積に設定されている。沈砂堆積部５Ａは、吸引工程と輸送工程を繰り返す毎に、内部の圧力が真空圧と大気圧に変化し、その容量が大きすぎるとエネルギーの無駄となり、小さすぎると沈砂による閉塞などの問題が発生する。このため、沈砂堆積部５Ａの適正な容量は、吸引輸送管６の断面積に吸引輸送管６の長さ２ｍ〜１０ｍ分を乗じて得られる容積程度であることが望ましい。   The volume of the sand sedimentation portion 5A is set to a volume obtained by multiplying the cross-sectional area of the suction transport pipe 6 by the length of 2 to 10 m of the suction transport pipe 6. Each time the sand settling part 5A repeats the suction process and the transport process, the internal pressure changes to a vacuum pressure and an atmospheric pressure. If the capacity is too large, energy is wasted, and if it is too small, there is a problem such as blockage by sand settling. Occur. For this reason, it is desirable that the appropriate capacity of the sand settling part 5A is about the volume obtained by multiplying the cross-sectional area of the suction transport pipe 6 by the length of 2 m to 10 m of the suction transport pipe 6.

図３に示すように、レジューサー５Ｂと吸引輸送管６との継手２５の内部には、吸引輸送管６内の閉塞を防止するためのリング（オリフィス）２７が設けられている。このリング２７の内径は吸引輸送管６の口径より若干小さく設計されている。例として、吸引輸送管６の口径が８０ｍｍである場合、リング２７の内径は７０ｍｍとし、吸引輸送管６の口径が１００ｍｍである場合、リング２７の内径は９０ｍｍとする。このリング２７を設けることにより、リング２７の内径より大きなサイズの沈砂は、吸引輸送管６を通過することができないため、吸引輸送管６が閉塞することはない。   As shown in FIG. 3, a ring (orifice) 27 for preventing blockage in the suction transport pipe 6 is provided in the joint 25 between the reducer 5 </ b> B and the suction transport pipe 6. The inner diameter of the ring 27 is designed to be slightly smaller than the diameter of the suction transport pipe 6. For example, when the diameter of the suction transport pipe 6 is 80 mm, the inner diameter of the ring 27 is 70 mm, and when the diameter of the suction transport pipe 6 is 100 mm, the inner diameter of the ring 27 is 90 mm. By providing this ring 27, the sedimentation size larger than the inner diameter of the ring 27 cannot pass through the suction transport pipe 6, so that the suction transport pipe 6 is not blocked.

沈砂堆積部５Ａには、リング２７の口径よりも大きなサイズの沈砂が徐々に堆積していくため、揚砂能力が徐々に低下し、いずれは揚砂不能となってしまう。そのため、設備維持の観点から堆積した沈砂の量を確認する必要がある。したがって、沈砂堆積部５Ａには、沈砂除去口としてのハンドホール３０が設けられており、堆積した沈砂の量はこのハンドホール３０から目視確認することができる。ハンドホール３０は、通常は蓋３２によって覆われている。なお、堆積した沈砂の量は、センサによって確認することも可能である。沈砂堆積部５Ａの内部にセンサ（図示せず）を備えることで、センサは内部が沈砂で満杯になる前に堆積した沈砂を検知し、その信号に基づき制御部が警報等を出すか、あるいは装置の運転を停止することができる。このような動作は制御部２０に行わせてもよい。そして、沈砂の堆積量をこのようなセンサにより管理することで設備維持が容易になる。   Since sand sediment having a size larger than the diameter of the ring 27 gradually accumulates in the sand sediment accumulation portion 5A, the sand-carrying capacity gradually decreases, and eventually it becomes impossible to carry out sand-carrying. Therefore, it is necessary to check the amount of sedimentation sediment from the viewpoint of equipment maintenance. Therefore, the sand settling part 5A is provided with a hand hole 30 as a sand set removal port, and the amount of accumulated sand set can be visually confirmed from the hand hole 30. The handhole 30 is usually covered with a lid 32. The amount of accumulated sedimentation can also be confirmed by a sensor. By providing a sensor (not shown) inside the sand settling part 5A, the sensor detects sand settling before the inside is filled with sand settling, and the control unit gives an alarm or the like based on the signal, or The operation of the device can be stopped. Such an operation may be performed by the control unit 20. And the facility maintenance becomes easy by managing the amount of sedimentation of sand by such a sensor.

沈砂堆積部５Ａのハンドホール３０の近傍には、洗浄水供給口３５が設けられている。この洗浄水供給口３５は、洗浄水を沈砂堆積部５Ａ内部に噴射させるために設けられている。すなわち、洗浄水が洗浄水供給口３５を通して沈砂堆積部５Ａ内部に噴射されることで沈砂が洗浄される。そして、洗浄された沈砂はハンドホール３０から除去される。本実施形態では、洗浄水供給口３５は２箇所に設けられているが、堆積した沈砂を洗浄することができれば、１箇所または３箇所以上に設けてもよい。洗浄水供給口３５は沈砂の取り出し口であるハンドホール３０の近傍に設けられることが望ましい。洗浄水供給口３５がハンドホール３０近傍に設けられなければハンドホール３０近傍に堆積した沈砂を洗浄することができず、沈砂を衛生的に取り出すことができないためである。   A washing water supply port 35 is provided in the vicinity of the hand hole 30 of the sand settling part 5A. The cleaning water supply port 35 is provided for injecting the cleaning water into the sand settling part 5A. That is, the wash water is sprayed into the sand settling part 5A through the wash water supply port 35 to wash the sand settling. Then, the washed sand sediment is removed from the handhole 30. In the present embodiment, the cleaning water supply ports 35 are provided at two locations, but may be provided at one location or three or more locations as long as the accumulated sedimentation sand can be cleaned. The washing water supply port 35 is preferably provided in the vicinity of the hand hole 30 which is a sedimentation outlet. This is because if the cleaning water supply port 35 is not provided in the vicinity of the hand hole 30, the sand settling in the vicinity of the hand hole 30 cannot be cleaned and the settling sand cannot be taken out hygienically.

沈砂堆積部５Ａのハンドホール３０の下方に自動沈砂除去装置４０を設けてもよい。この自動沈砂除去装置４０と沈砂堆積部５Ａとは、接続部４１で接続されている。自動沈砂除去装置４０としては、ナイフゲート弁を用いることができる。沈砂が沈砂堆積部５Ａに堆積し、除去する必要が生じた場合は、堆積した沈砂を手動または自動で自動沈砂除去装置４０内に落下させ、この自動沈砂除去装置４０を作動させることで沈砂を除去する。手動による場合は、ハンドホール３０から沈砂の堆積量を目視確認し、自動沈砂除去装置４０を作動させることで沈砂を除去する。自動による場合は、沈砂堆積部５Ａの内部に備えられたセンサにより、堆積した沈砂を検知し、その信号に基づき、制御部が自動沈砂除去装置４０を作動させることで沈砂を除去する。このような動作は制御部２０に行わせてもよい。そして、このような自動沈砂除去装置を備えることにより、設備維持が容易になる。   An automatic sand settling device 40 may be provided below the handhole 30 of the sand settling unit 5A. The automatic sand removal device 40 and the sand settling part 5A are connected by a connecting part 41. A knife gate valve can be used as the automatic sand removal device 40. In the case where it is necessary to remove the sedimentation sediment deposited on the sedimentation sedimentation unit 5A, the sedimentation sediment is manually or automatically dropped into the automatic sedimentation removal device 40, and the automatic sedimentation removal device 40 is operated to remove the sedimentation sand. Remove. In the case of manual operation, the amount of sedimentation is visually confirmed from the hand hole 30 and the automatic sedimentation removal device 40 is operated to remove the sedimentation. In the case of automatic operation, the accumulated sand sedimentation is detected by a sensor provided in the sand sediment accumulation section 5A, and the control section removes the sand sediment by operating the automatic sand sediment removal device 40 based on the signal. Such an operation may be performed by the control unit 20. And maintenance of an installation becomes easy by providing such an automatic sand removal apparatus.

吸引輸送管６の途中には、吸引輸送弁４５が設けられている。実用的な真空度としてその初期値を−４９．０ｋＰａ（−５ｍＡｑ）とした場合、この吸引輸送弁４５が設けられていないと、固液回収タンク１０の初期真空度を例えば−５８．８ｋＰａ（−６ｍＡｑ）程度と高くしないと、その後の繰り返し時に必要な−４９．０ｋＰａ（−５ｍＡｑ）程度の真空度が得られない。これは、初期真空度の形成時に固液混合体などの吸引にエネルギーが消費されるためである。この吸引輸送弁４５を設けた場合は、当初から−４９．０ｋＰａ（−５ｍＡｑ）程度の真空度で固液混合体を輸送できる。このように、吸引輸送弁４５を設けることにより、真空形成時間を事前に行っておくことができ、吸引輸送に要する時間を見かけ上短縮することができ、また、初期真空度を低くできる分だけ省エネルギー化を図ることができる。   A suction transport valve 45 is provided in the middle of the suction transport pipe 6. Assuming that the initial vacuum value is −49.0 kPa (−5 mAq) as a practical vacuum level, if the suction transport valve 45 is not provided, the initial vacuum level of the solid-liquid recovery tank 10 is, for example, −58.8 kPa ( Unless it is as high as about −6 mAq), a degree of vacuum of about −49.0 kPa (−5 mAq) required for subsequent repetition cannot be obtained. This is because energy is consumed to suck the solid-liquid mixture or the like when the initial vacuum degree is formed. When this suction transport valve 45 is provided, the solid-liquid mixture can be transported at a vacuum degree of about −49.0 kPa (−5 mAq) from the beginning. In this way, by providing the suction transport valve 45, the vacuum formation time can be performed in advance, the time required for suction transport can be apparently reduced, and the initial vacuum degree can be lowered. Energy saving can be achieved.

次に、このような構成の揚砂輸送装置を用いて沈砂池１の池底に堆積した沈砂を引き上げる場合の動作について説明する。まず、大気開放弁１５および吸引輸送弁４５を閉じた状態で真空装置１２を駆動する。これにより、真空装置１２が接続された固液回収タンク１０および吸引輸送弁４５から固液回収タンク１０までの吸引輸送管６の内部を、例えば−４９．０ｋＰａ（−５ｍＡｑ）程度まで減圧する。固液回収タンク１０の真空度が目的とする値となったら、吸引輸送弁４５を急開する。これにより、図４に示すように、沈砂池１中の沈砂を含んだ水が固液混合体５０として吸引輸送管２内に吸引される。本実施形態における吸引輸送管６の断面積は吸引輸送管２の断面積よりも小さい。したがって、吸引輸送管２に形成された輸送用水柱は、吸引輸送管６では長くなる。そのため、引き上げる水柱が長すぎると、吸引輸送管６内の輸送用水柱は輸送可能な水柱の長さを超えてしまい輸送できなくなる。そこで、固液混合体の引き上げ時間は、従来の装置では約４秒程度であったが、本実施形態ではその半分の約２秒とするのが好ましい。   Next, the operation in the case of lifting the sediment deposited on the bottom of the sedimentation basin 1 using the sand transporting device having such a configuration will be described. First, the vacuum device 12 is driven with the atmosphere release valve 15 and the suction transport valve 45 closed. Thereby, the inside of the suction / transport pipe 6 from the solid / liquid recovery tank 10 to which the vacuum device 12 is connected and the suction / transport valve 45 to the solid / liquid recovery tank 10 is decompressed to, for example, about −49.0 kPa (−5 mAq). When the degree of vacuum of the solid-liquid recovery tank 10 reaches a target value, the suction transport valve 45 is opened rapidly. As a result, as shown in FIG. 4, the water containing the settling sand in the settling basin 1 is sucked into the suction transport pipe 2 as the solid-liquid mixture 50. The cross-sectional area of the suction transport pipe 6 in this embodiment is smaller than the cross-sectional area of the suction transport pipe 2. Accordingly, the transport water column formed in the suction transport pipe 2 is longer in the suction transport pipe 6. Therefore, if the water column to be pulled up is too long, the transport water column in the suction transport pipe 6 exceeds the length of the transportable water column and cannot be transported. Therefore, the pulling time of the solid-liquid mixture is about 4 seconds in the conventional apparatus, but in the present embodiment, it is preferably about 2 seconds, which is half that time.

固液混合体５０を吸引する際、必要に応じて水噴射ノズル２２から水噴射を行い、沈砂を流動化し、開口部２ａから沈砂を吸引しやすいようにする。このように、水噴射ノズル２２から水を噴射して、沈砂池１内の沈砂を流動化させるとともに、吸引輸送管６の吸引輸送弁４５を開けることにより、吸引輸送管２の開口部２ａ近傍に沈砂池１内の沈砂を集めつつ、図４に示すように、沈砂池１中の沈砂を含んだ水が固液混合体５０として吸引輸送管２内に吸引される。このとき、必要により一部の水噴射ノズル２２から継続的に水を噴射させてもよい。この固液混合体５０の沈砂の濃度は２０〜３５％とし、好ましくは平均３０％前後とする。これにより、揚砂輸送効率を安定および向上させることができる。   When the solid-liquid mixture 50 is sucked, water is jetted from the water jet nozzle 22 as necessary to fluidize the sand and make it easy to suck the sand from the opening 2a. In this manner, water is jetted from the water jet nozzle 22 to fluidize the sand settling in the sand settling basin 1 and the suction transport valve 45 of the suction transport pipe 6 is opened, so that the vicinity of the opening 2a of the suction transport pipe 2 As shown in FIG. 4, water containing the settling sand in the settling basin 1 is sucked into the suction transport pipe 2 as a solid-liquid mixture 50 while collecting the settling sand in the settling basin 1. At this time, if necessary, water may be continuously ejected from some of the water ejection nozzles 22. The concentration of the settling sand in the solid-liquid mixture 50 is 20 to 35%, preferably about 30% on average. Thereby, the sand transport efficiency can be stabilized and improved.

吸引輸送管２内の固液混合体５０の水位が大気開放管１６の接続部１６ａよりも上方に上昇したときに大気開放弁１５を開いて吸引輸送管２の大気開放管１６との接続部１６ａを大気開放する。このように大気開放弁１５を開くことにより、図５に示すように、大気開放管１６の接続部１６ａよりも上方に位置していた吸引輸送管２内の固液混合体５０は輸送用水柱５０ａとなる。   When the water level of the solid-liquid mixture 50 in the suction transport pipe 2 rises above the connection part 16a of the atmosphere release pipe 16, the atmosphere release valve 15 is opened to connect the suction transport pipe 2 to the atmosphere release pipe 16 16a is opened to the atmosphere. By opening the air release valve 15 in this way, as shown in FIG. 5, the solid-liquid mixture 50 in the suction transport pipe 2 located above the connection portion 16a of the air release pipe 16 is transported to the water column for transportation. 50a.

図６に示すように、吸引輸送管２には少なくとも２つの圧力センサ５５，５５を設けてもよい。これら２つの圧力センサ５５，５５は異なる高さに設置される。この２つの圧力センサ５５，５５は差圧検出器５７に接続されており、この差圧検出器５７は２つの圧力センサ５５，５５の出力信号を基に輸送用水柱５０ａの長さを検出することができる。そのため、輸送用水柱５０ａの引き上げは、吸引輸送管２に設けられた圧力センサ５５，５５及び差圧検出器５７により管理することができる。その結果、輸送用水柱５０ａの管理の適正化を図ることができ、さらに輸送をスムーズに行うことができる。圧力センサ５５，５５及び差圧検出器５７に代えて、透過型レーザー判別センサを用いて輸送用水柱の長さを検出してもよい。   As shown in FIG. 6, the suction transport pipe 2 may be provided with at least two pressure sensors 55, 55. These two pressure sensors 55, 55 are installed at different heights. The two pressure sensors 55, 55 are connected to a differential pressure detector 57. The differential pressure detector 57 detects the length of the transport water column 50a based on the output signals of the two pressure sensors 55, 55. be able to. Therefore, the lifting of the transport water column 50 a can be managed by the pressure sensors 55 and 55 and the differential pressure detector 57 provided in the suction transport pipe 2. As a result, it is possible to optimize the management of the transport water column 50a, and it is possible to carry out the transport smoothly. Instead of the pressure sensors 55, 55 and the differential pressure detector 57, the length of the water column for transportation may be detected using a transmission type laser discrimination sensor.

輸送用水柱５０ａは、吸引輸送管２を通り、フロア面（ＦＬ）に設置された沈砂堆積部５Ａに移送され、沈砂堆積部５Ａに移送された輸送用水柱５０ａはレジューサー５Ｂに移送される。吸引輸送管５の流出部は、レジューサー５Ｂにより狭められているため、輸送用水柱５０ａの輸送スピードは一時的に遅くなり、結果として、輸送用水柱５０ａに含まれている沈砂は、沈砂堆積部５Ａに沈降、堆積する。堆積した沈砂は、後に送られてくる輸送用水柱の前方に取り込まれ、再び輸送用水柱を形成しながら、固液回収タンク１０に送り込まれる。吸引輸送管５を通過した輸送用水柱５０ａは、吸引輸送管６の断面積に応じて長くなり、そのまま固液回収タンク１０に輸送される。   The transport water column 50a passes through the suction transport pipe 2 and is transferred to the sand settling part 5A installed on the floor surface (FL), and the transport water column 50a transferred to the sand settling part 5A is transferred to the reducer 5B. . Since the outflow portion of the suction transport pipe 5 is narrowed by the reducer 5B, the transport speed of the transport water column 50a is temporarily reduced, and as a result, the sand contained in the transport water column 50a is sedimented. Settling and depositing on part 5A. The accumulated sand is taken in front of the transport water column to be sent later, and sent to the solid-liquid recovery tank 10 while forming the transport water column again. The transport water column 50a that has passed through the suction transport pipe 5 becomes longer according to the cross-sectional area of the suction transport pipe 6, and is transported to the solid-liquid recovery tank 10 as it is.

輸送用水柱５０ａに含まれる大型の沈砂は、レジューサー５Ｂに捕捉される。このため、沈砂堆積部５Ａには、レジューサー５Ｂを通過できなかった大型の沈砂が徐々に堆積していく。吸引輸送管５のレジューサー（流出部）５Ｂは鉛直に延びているので、レジューサー５Ｂが直ぐに閉塞することはないが、大型の沈砂の堆積量が増えると、揚砂能力が下がり、いずれ揚砂不能となる。そこで、堆積した沈砂の量をハンドホール３０から確認し、定期的にこのハンドホール３０から沈砂を除去することにより揚砂能力の維持が可能となる。沈砂を除去する際、洗浄水が洗浄水供給口３５を通して沈砂堆積部５Ａ内部の沈砂に噴射される。沈砂が洗浄された後、これを取り除くことで、衛生的に作業を行うことができる。このように、沈砂堆積部５Ａは大型の沈砂の一時貯留槽として機能するので、吸引輸送管６の口径を小さくできる。したがって、使用する動力や配管敷設コストを増やすことなく、大きなサイズの沈砂を沈砂池１から引き上げることができる。なお、上述したように沈砂の堆積量は沈砂堆積部５Ａ内部にセンサを備えることで自動的に管理することができ、堆積した沈砂は沈砂堆積部５Ａの下方に自動沈砂除去装置４０を備えることで、自動的に取り除くことができる。このようなセンサや自動沈砂除去装置を備えることにより、設備維持が容易になる。   Large sedimentation contained in the transport water column 50a is captured by the reducer 5B. For this reason, large-scale sedimentation that could not pass through the reducer 5B gradually accumulates in the sedimentation sedimentation portion 5A. Since the reducer (outflow part) 5B of the suction transport pipe 5 extends vertically, the reducer 5B does not immediately clog, but when the amount of large sedimentation increases, the sand lifting capacity decreases, It becomes impossible to sand. Therefore, the amount of accumulated sedimentation is confirmed from the hand hole 30, and the sand removal capability can be maintained by periodically removing the sediment from the hand hole 30. When removing the settling sand, the wash water is sprayed through the wash water supply port 35 to the settling sand inside the sand settling portion 5A. After the settling sand is washed, it can be sanitized by removing it. Thus, since the sand sedimentation part 5A functions as a temporary storage tank for large sedimentation, the diameter of the suction transport pipe 6 can be reduced. Therefore, it is possible to lift a large size of sand settling from the sand settling basin 1 without increasing the power used and the piping laying cost. In addition, as described above, the amount of sedimentation can be automatically managed by providing a sensor inside the sedimentation accumulation unit 5A, and the accumulated sedimentation is provided with an automatic sedimentation removal device 40 below the sedimentation deposition unit 5A. Can be removed automatically. By providing such a sensor and an automatic sand removal device, facility maintenance is facilitated.

また、図７に示すように吸引輸送管５の入口及び出口の近傍に、少なくとも２つの圧力センサ６０，６０を設けてもよい。この２つの圧力センサ６０，６０は差圧検出器７０に接続されており、この差圧検出器７０は２箇所の圧力センサ６０，６０の信号を基に沈砂の堆積量を検出することができる。すなわち、沈砂は沈砂堆積部５Ａに堆積していくため、差圧検出器７０が、輸送用水柱５０ａが吸引輸送管５の入口を通過するときの圧力と吸引輸送管５の出口を通過するときの圧力との差を検知することで、沈砂堆積部５Ａ内の沈砂の堆積量を推定することができる。差圧検出器７０は圧力センサ６０，６０により吸引輸送管５の入口圧力と出口圧力との差が大きくなったことを検知し、その検知信号に基づき制御部が警報等を出すか、あるいは装置の運転を停止することができる。   Further, as shown in FIG. 7, at least two pressure sensors 60, 60 may be provided in the vicinity of the inlet and outlet of the suction transport pipe 5. The two pressure sensors 60, 60 are connected to a differential pressure detector 70. The differential pressure detector 70 can detect the amount of sedimentation based on signals from the two pressure sensors 60, 60. . That is, since the sedimentation is accumulated in the sedimentation accumulation part 5A, when the differential pressure detector 70 passes the pressure when the transport water column 50a passes through the inlet of the suction transport pipe 5 and the outlet of the suction transport pipe 5. By detecting the difference from the pressure, the amount of sedimentation in the sedimentation part 5A can be estimated. The differential pressure detector 70 detects that the difference between the inlet pressure and the outlet pressure of the suction transport pipe 5 is increased by the pressure sensors 60, 60, and the control unit issues an alarm or the like based on the detection signal, or the device Can be stopped.

輸送用水柱５０ａは、固液回収タンク１０側の端部に作用する真空圧と大気開放側の端部、すなわち輸送用水柱５０ａの下面に作用する大気圧との圧力差により、図８に示すように固液回収タンク１０に向かって移動し輸送される。   The transport water column 50a is shown in FIG. 8 due to the pressure difference between the vacuum pressure acting on the end portion on the solid-liquid recovery tank 10 side and the atmospheric pressure acting on the end portion on the air release side, that is, the lower surface of the transport water column 50a. Thus, it moves toward the solid-liquid recovery tank 10 and is transported.

ここで、固液回収タンク１０の真空度が維持されるように、輸送用水柱の全体が固液回収タンク１０に入る直前に、すなわち、図８に示すように、輸送用水柱５０ａの後端部が固液回収タンク１０内に入りきってしまう前に、制御部２０が大気開放弁１５を閉じ、大気開放弁１５から固液回収タンク１０までの経路に空気の連通路ができないようにすることが好ましい。これにより大気開放弁１５からの空気の流入量を最小限にすることができるため、固液回収タンク１０内の真空度を高く、かつ、その変動幅を小さく保つことができる。   Here, just before the entire transport water column enters the solid-liquid recovery tank 10 so that the degree of vacuum of the solid-liquid recovery tank 10 is maintained, that is, as shown in FIG. 8, the rear end of the transport water column 50a. The control unit 20 closes the air release valve 15 before the part completely enters the solid-liquid recovery tank 10, so that there is no air communication path from the air release valve 15 to the solid-liquid recovery tank 10. It is preferable. Thereby, since the inflow amount of air from the atmosphere release valve 15 can be minimized, the degree of vacuum in the solid-liquid recovery tank 10 can be increased and the fluctuation range can be kept small.

大気開放弁１５が再び閉じられると、上述と同様に沈砂池１中の沈砂と水が吸引輸送管２内に吸引され、図９に示すように、輸送用水柱５０ｂが再び形成される。その後は上述と同様の工程を繰り返すことにより、沈砂池１の池底に堆積した沈砂を断続的に固液回収タンク１０に揚砂輸送することができる。図９に示すように、圧力センサ７５を固液回収タンク１０の手前の吸引輸送管６に設けてもよい。この圧力センサ７５により輸送用水柱の輸送が完了したことを検知し、次の固液混合体の引き上げを容易に行うことができる。揚砂輸送工程の終了は、固液回収タンク１０の高水位、沈砂池１の低水位、設定時間のタイムアップなどに基づいて判断される。   When the air release valve 15 is closed again, the settling sand and water in the settling basin 1 are sucked into the suction transport pipe 2 as described above, and the transport water column 50b is formed again as shown in FIG. Thereafter, by repeating the same process as described above, the sand deposited on the bottom of the sand basin 1 can be intermittently transported to the solid-liquid recovery tank 10 by sand. As shown in FIG. 9, the pressure sensor 75 may be provided in the suction transport pipe 6 in front of the solid-liquid recovery tank 10. The pressure sensor 75 detects that the transportation of the transportation water column has been completed, and the next solid-liquid mixture can be easily pulled up. The completion of the sand transporting process is determined based on the high water level of the solid-liquid recovery tank 10, the low water level of the sand basin 1, the time-up of the set time, and the like.

吸引輸送弁４５は固液回収タンク１０の真空度が所定値になるまでは全閉状態であるが、その後は揚砂輸送工程が終了するまでは全開状態となっている。また、真空圧がすばやく吸引輸送管２内に作用するように、吸引輸送弁４５は急開急閉および全開全閉できるようになっていることが好ましい。   The suction transport valve 45 is in a fully closed state until the degree of vacuum of the solid-liquid recovery tank 10 reaches a predetermined value, but thereafter it is in a fully open state until the sand transporting process is completed. Further, it is preferable that the suction transport valve 45 can be opened and closed quickly and fully opened and fully closed so that the vacuum pressure acts in the suction transport pipe 2 quickly.

また、吸引輸送弁４５の全開時の口径を、吸引輸送管６と同一の口径程度にすることが好ましい。真空圧が沈砂と水の固液混合体および輸送用水柱に損失なく速く作用するように、吸引輸送弁４５を、沈砂などの噛み込みの生じない仕様の弁、例えばストレート型のダイヤフラム弁やボール弁などとすることが好ましい。   Further, it is preferable that the diameter of the suction transport valve 45 when fully opened is about the same diameter as the suction transport pipe 6. In order for the vacuum pressure to act quickly on the solid-liquid mixture of sedimentation and water and the water column for transportation without loss, the suction transport valve 45 is a valve with specifications that do not cause biting such as sedimentation, such as a straight diaphragm valve or ball A valve or the like is preferable.

大気開放管１６の口径は吸引輸送管６の口径の１／２以上、吸引輸送管６の口径以下とすることが好ましい。例として、吸引輸送管２の口径が１２５ｍｍである場合、吸引輸送管６の口径は８０ｍｍ、大気開放管１６の口径は５０ｍｍとし、吸引輸送管２の口径が１５０ｍｍである場合、吸引輸送管６の口径は１００ｍｍ、大気開放管１６の口径は６５ｍｍとすることが望ましい。また、大気開放弁１５は、全開全閉のできる弁とし、全開時の開口面積は大気開放管１６の断面積と同等程度にすることが好ましい。さらに、大気開放管１６は、水平面に対して所定の角度、好ましくは５０〜７０度の角度を持って、吸引輸送管２に接続されていることも重要である。これは吸引輸送管２内の固体物、すなわち沈砂が大気開放管１６側に逆流し、堆積することを防止するためである。また、大気開放管１６内に沈砂が若干入り込んでも、沈砂の安息角よりも上記接続角度が大きいことによって、粘性のある沈砂もより容易に吸引輸送管２内に吸引され、残留することがなく、大気の吸引上、圧力損失が生じないようにするためである。それ故、上記接続角度は７０度より大きくてもよい。しかし、口径の異なる配管をかなりの角度を持って接続することは、製作上の観点から好ましくなく、実用的には、接続しやすい７０度以下とすれば充分である。   It is preferable that the diameter of the atmosphere opening pipe 16 is not less than ½ the diameter of the suction transport pipe 6 and not more than the diameter of the suction transport pipe 6. As an example, when the diameter of the suction transport pipe 2 is 125 mm, the diameter of the suction transport pipe 6 is 80 mm, the diameter of the atmosphere release pipe 16 is 50 mm, and when the diameter of the suction transport pipe 2 is 150 mm, the suction transport pipe 6 It is desirable that the diameter of the tube is 100 mm and the diameter of the open air pipe 16 is 65 mm. Further, the atmosphere release valve 15 is preferably a valve that can be fully opened and closed, and the opening area when fully opened is preferably equal to the cross-sectional area of the atmosphere release pipe 16. Furthermore, it is important that the atmosphere release pipe 16 is connected to the suction transport pipe 2 at a predetermined angle with respect to the horizontal plane, preferably 50 to 70 degrees. This is to prevent the solid matter in the suction transport pipe 2, that is, the sand, from flowing back to the atmosphere release pipe 16 side and accumulating. Further, even if the sand settling into the atmosphere opening pipe 16 slightly, the above-mentioned connection angle is larger than the angle of repose of the sand settling so that the viscous sand set is more easily sucked into the suction transport pipe 2 and does not remain. This is to prevent pressure loss from occurring in the air suction. Therefore, the connection angle may be larger than 70 degrees. However, it is not preferable to connect pipes having different diameters at a considerable angle from the viewpoint of manufacturing, and in practice, it is sufficient to set the angle to 70 degrees or less that is easy to connect.

本発明の実施形態においては、大気開放弁１５を開とした時に、吸引輸送管２と大気開放管１６の接続部１６ａに空気がスムーズに、一気に吸引され、該接続部１６ａ近傍よりも上方の固液混合体をピストン流的に、固液回収タンク１０の真空圧の作用により吸引して、輸送用水柱５０ａ，５０ｂを形成させるようにすることが必要である。これは、空気がスムーズに、一気にピストン流的に吸引されることが遅れるほど、形成される輸送用水柱内には空気が入り込み易くなり、ピストン流的に輸送されにくくなり、輸送用水柱の形状の崩れ、すなわち、沈砂と水の分離が進むことになるからである。一方、接続部１６ａより下方の固液混合体部分は沈砂と水が分離しながら、沈砂池１の方に移動落下していく。   In the embodiment of the present invention, when the atmosphere release valve 15 is opened, the air is smoothly sucked into the connection portion 16a between the suction transport pipe 2 and the atmosphere release pipe 16 at a stretch, and is above the vicinity of the connection portion 16a. It is necessary to suck the solid-liquid mixture in a piston flow by the action of the vacuum pressure of the solid-liquid recovery tank 10 to form the transport water columns 50a and 50b. This is because the more slowly the air is drawn into the piston flow at a stretch, the more easily the air enters the formed transport water column, and the more difficult it is to transport in the piston flow. This is because the collapse of the sand, that is, the separation of sand and water proceeds. On the other hand, the solid-liquid mixture portion below the connecting portion 16a moves and falls toward the sand settling basin 1 while the settling sand and water are separated.

制御部２０は、大気開放弁１５の開時間と閉時間の設定、そのタイミング、弁開閉の速度、全開全閉の確認、固液回収タンク１０の真空度の制御などを行うとともに、他の必要な制御機能を同時に有していてもよい。   The control unit 20 performs setting of the opening time and closing time of the air release valve 15, the timing thereof, valve opening / closing speed, confirmation of full opening / closing, control of the degree of vacuum of the solid-liquid recovery tank 10, and other requirements. Various control functions may be provided at the same time.

また、吸引輸送管２の開口部２ａの口径は、吸引輸送管２の口径の１／２以上とするのが好ましい。これは、口径が小さすぎると沈砂などで詰まることがあり、大きすぎると吸引流速、すなわち吸引力が小さくなりすぎるからである。沈砂などのスラリーを対象とする場合は、実際の揚砂輸送管２，５，６は、材質がＳＵＳ３０４で、その肉厚としてＳｃｈ４０のような厚いものを使用し、耐摩耗性を保つようにしている。それ故、揚砂輸送配管２，５，６はその全体が不透明であり、輸送用水柱の形成およびその輸送状態を目視観測できるような透明管ではない。したがって、輸送用水柱の形成、その輸送工程が正常に行われているか否かの観測を大気開放弁１５の開閉の発信信号、その開に要する時間、閉に要する時間、全開全閉状態の時間などのタイマー設定と共に、差圧検出器５７，７０，圧力センサ７５からの信号に基づいて行えることは、本発明の揚砂輸送装置を実施する上で非常に有効である。   Moreover, it is preferable that the diameter of the opening 2 a of the suction transport pipe 2 is not less than ½ of the diameter of the suction transport pipe 2. This is because if the diameter is too small, it may be clogged with sedimentation, and if it is too large, the suction flow rate, that is, the suction force becomes too small. When slurries such as sand settling are targeted, the actual sand transport pipes 2, 5, and 6 are made of SUS304, and the wall thickness is thick, such as Sch40, so that wear resistance is maintained. ing. Therefore, the entire sand transport pipes 2, 5, and 6 are opaque and are not transparent pipes that can visually observe the formation of the water column for transportation and the transport state thereof. Accordingly, the formation of the water column for transportation and the observation of whether or not the transportation process is normally performed are the transmission signal for opening and closing the atmospheric release valve 15, the time required for opening, the time required for closing, and the time for the fully open fully closed state. What can be performed based on the signals from the differential pressure detectors 57 and 70 and the pressure sensor 75 together with the timer setting such as the above is very effective in implementing the sand transporting device of the present invention.

図１０は、本発明の第２の実施形態における揚砂輸送装置の構成を示す模式図である。なお、特に説明しない第２の実施形態の構成および動作は、上述した第１の実施形態と同様であり、その重複する説明を省略する。本実施形態においては、大気開放管１６との接続部１６ａの下方の沈砂池水中の接続部８０ａにおいて吸引輸送管２に接続される空気注入管８０が設けられている。この空気注入管８０の接続部８０ａと大気開放管１６の接続部１６ａとの間の長さは好ましくは０．５ｍ〜２．０ｍとし、この長さは、沈砂池１の設計水位や適用する固液回収タンク１０の真空度等によって適宜変更される。   FIG. 10 is a schematic diagram showing the configuration of the sand transporting apparatus according to the second embodiment of the present invention. Note that the configuration and operation of the second embodiment that are not particularly described are the same as those of the first embodiment described above, and redundant description thereof is omitted. In the present embodiment, an air injection pipe 80 connected to the suction transport pipe 2 is provided at a connection portion 80a in the settling basin water below the connection portion 16a with the atmosphere opening pipe 16. The length between the connection part 80a of the air injection pipe 80 and the connection part 16a of the air release pipe 16 is preferably 0.5 m to 2.0 m, and this length is applied to the design water level of the sand basin 1 or applied. It is appropriately changed depending on the degree of vacuum of the solid-liquid recovery tank 10 or the like.

空気注入管８０には、減圧弁８２を介して空気移送装置としてのコンプレッサ８４が接続されており、コンプレッサ８４と空気注入管８０との間には空気注入弁８８が設けられている。大気開放弁１５と空気注入弁８８には制御部９０が接続されており、この制御部９０によって大気開放弁１５および空気注入弁８８の開閉が制御される。   A compressor 84 as an air transfer device is connected to the air injection pipe 80 via a pressure reducing valve 82, and an air injection valve 88 is provided between the compressor 84 and the air injection pipe 80. A control unit 90 is connected to the atmosphere release valve 15 and the air injection valve 88, and the control unit 90 controls opening and closing of the atmosphere release valve 15 and the air injection valve 88.

このような構成の揚砂輸送装置を用いて沈砂池１の池底に堆積した沈砂を引き上げる場合の動作について説明する。まず、大気開放弁１５、空気注入弁８８、および吸引輸送弁４５を閉じた状態で真空装置１２を駆動する。これにより、真空装置１２が接続された固液回収タンク１０および吸引輸送弁４５から固液回収タンク１０までの吸引輸送管６の内部を、例えば−４９．０ｋＰａ（−５ｍＡｑ）程度まで減圧する。   An operation in the case where the sedimentation sediment deposited on the bottom of the sedimentation basin 1 is pulled up using the sand transporting device having such a configuration will be described. First, the vacuum device 12 is driven with the atmosphere release valve 15, the air injection valve 88, and the suction transport valve 45 closed. Thereby, the inside of the suction / transport pipe 6 from the solid / liquid recovery tank 10 to which the vacuum device 12 is connected and the suction / transport valve 45 to the solid / liquid recovery tank 10 is decompressed to, for example, about −49.0 kPa (−5 mAq).

固液回収タンク１０の真空度が目標とする値となったら、吸引輸送弁４５を急開する。これにより、図１１に示すように、沈砂池１中の沈砂および水が固液混合体５０として吸引輸送管２内に吸引される。このとき、必要に応じて水噴射ノズル２２から水噴射を行い、沈砂を流動化し、開口部２ａから沈砂を吸引しやすいようにする。   When the degree of vacuum of the solid-liquid recovery tank 10 reaches a target value, the suction transport valve 45 is opened rapidly. Thus, as shown in FIG. 11, the sand and water in the sand basin 1 are sucked into the suction transport pipe 2 as a solid-liquid mixture 50. At this time, water is jetted from the water jet nozzle 22 as necessary to fluidize the sand and make it easy to suck the sand from the opening 2a.

そして、図１２に示すように、空気注入弁８８を開いて、沈砂池１の水位よりも高い圧力、例えば２０ｋＰａ〜５０ｋＰａの加圧空気を吸引輸送管２の内部に注入する。これにより、空気注入管８０の接続部８０ａよりも上方の固液混合体を、大気開放管１６の接続部１６ａの近傍またはそれよりも上方に上昇させる。   Then, as shown in FIG. 12, the air injection valve 88 is opened, and a pressure higher than the water level of the sand basin 1, for example, pressurized air of 20 kPa to 50 kPa is injected into the suction transport pipe 2. Thereby, the solid-liquid mixture above the connection part 80a of the air injection pipe 80 is raised in the vicinity of the connection part 16a of the atmosphere release pipe 16 or above it.

次いで、大気開放弁１５を開くとともに空気注入弁８８を閉じ、大気開放管１６の接続部１６ａを大気開放することにより、図１２に示すように長い輸送用水柱５０ａが形成される。この長い輸送用水柱５０ａは、固液回収タンク１０側の端部に作用する真空圧と大気開放側の端部に作用する大気圧との圧力差により、固液回収タンク１０に向かって移動し輸送される。但し、引き上げる水柱が長すぎると、吸引輸送管６内の輸送用水柱は輸送可能な水柱の長さを超えてしまい、輸送できなくなるため、輸送可能な長さの輸送用水柱を形成すべきである。なお、輸送用水柱の引き上げは、図６に示す吸引輸送管２に設けられた圧力センサ５５，５５及び差圧検出器５７により管理してもよい。輸送用水柱の管理を圧力センサ５５，５５及び差圧検出器５７で行うことにより、輸送用水柱の管理の適正化を図ることができ、さらに輸送をスムーズに行うことができる。   Next, the air release valve 15 is opened, the air injection valve 88 is closed, and the connection portion 16a of the atmosphere release pipe 16 is opened to the atmosphere, thereby forming a long water column 50a for transportation as shown in FIG. This long water column for transport 50a moves toward the solid-liquid recovery tank 10 due to the pressure difference between the vacuum pressure acting on the end portion on the solid-liquid recovery tank 10 side and the atmospheric pressure acting on the end portion on the air release side. Transported. However, if the water column to be lifted is too long, the transport water column in the suction transport pipe 6 exceeds the length of the transportable water column and cannot be transported. Therefore, a transport water column having a transportable length should be formed. is there. The lifting of the water column for transportation may be managed by the pressure sensors 55 and 55 and the differential pressure detector 57 provided in the suction transportation pipe 2 shown in FIG. By managing the water column for transportation with the pressure sensors 55 and 55 and the differential pressure detector 57, it is possible to optimize the management of the water column for transportation, and to transport smoothly.

輸送用水柱５０ａは、吸引輸送管２を通り、フロア面（ＦＬ）に設置された沈砂堆積部５Ａに移送され、沈砂堆積部５Ａに移送された輸送用水柱５０ａはレジューサー５Ｂに移送される。レジューサー５Ｂを通過した輸送用水柱５０ａは、吸引輸送管６の断面積に応じて長くなり、そのまま固液回収タンク１０に輸送される。   The transport water column 50a passes through the suction transport pipe 2 and is transferred to the sand settling part 5A installed on the floor surface (FL), and the transport water column 50a transferred to the sand settling part 5A is transferred to the reducer 5B. . The transport water column 50a that has passed through the reducer 5B becomes longer according to the cross-sectional area of the suction transport pipe 6, and is transported to the solid-liquid recovery tank 10 as it is.

そして、制御部９０により輸送用水柱５０ａ全体が固液回収タンク１０に入る直前に大気開放弁１５が再び閉じられる。これにより、沈砂池１中の沈砂と水を含んだ固液混合体が、再度、吸引輸送管２内に吸引される。その後は上述と同様の工程を繰り返すことにより、沈砂池１の池底に堆積した沈砂を断続的に固液回収タンク１０に輸送する。本実施形態においても、図６に示す圧力センサ５５、差圧検出器５７、図７に示す圧力センサ６０、差圧検出器７０、図９に示す圧力センサ７５を適用することができる。   The control unit 90 closes the air release valve 15 again immediately before the entire transport water column 50 a enters the solid-liquid recovery tank 10. As a result, the solid-liquid mixture containing the sand and water in the sand basin 1 is again sucked into the suction transport pipe 2. Thereafter, by repeating the same process as described above, the sediment deposited on the bottom of the sedimentation basin 1 is intermittently transported to the solid-liquid recovery tank 10. Also in this embodiment, the pressure sensor 55, the differential pressure detector 57 shown in FIG. 6, the pressure sensor 60, the differential pressure detector 70 shown in FIG. 7, and the pressure sensor 75 shown in FIG. 9 can be applied.

吸引輸送管２の口径が１２５ｍｍである場合、大気開放管１６の口径は５０ｍｍとし、吸引輸送管２の口径が１５０ｍｍである場合、大気開放管１６の口径は６５ｍｍとすることが望ましい。さらに、空気注入管８０は、加圧空気を流通させるので、構造的に設置できる２５ｍｍ〜５０ｍｍの口径のものを用いることができる。例えば、吸引輸送管２の口径が１２５ｍｍである場合、空気注入管８０の口径は４０ｍｍとし、吸引輸送管２の口径が１５０ｍｍである場合、空気注入管８０の口径は５０ｍｍとすることが望ましい。また、大気開放弁１５および空気注入弁８８は、全開全閉のできる弁とし、全開時の開口面積は大気開放管１６および空気注入管８０とそれぞれ同等程度にすることが好ましい。なお、使用する空気注入弁８８は加圧空気用であるため、電磁弁でもよいが、圧力損失の少ない仕様のものが好ましい。さらに、大気開放管１６および空気注入管８０は、水平面に対して所定の角度、好ましくは５０〜７０度の角度を持って、吸引輸送管２に接続されていることも重要である。これは固液混合体の固体物、すなわち沈砂などが各管内に若干入り込んでも、その安息角によって容易に吸引輸送管２内に再吸引され、運転上の圧力損失が生じないようにし、スムーズな大気の吸引あるいは加圧空気の注入ができるようにするためである。   When the diameter of the suction transport pipe 2 is 125 mm, the diameter of the atmosphere release pipe 16 is preferably 50 mm, and when the diameter of the suction transport pipe 2 is 150 mm, the diameter of the atmosphere release pipe 16 is desirably 65 mm. Furthermore, since the pressurized air is circulated, the air injection tube 80 having a diameter of 25 mm to 50 mm that can be structurally installed can be used. For example, when the diameter of the suction transport pipe 2 is 125 mm, the diameter of the air injection pipe 80 is 40 mm, and when the diameter of the suction transport pipe 2 is 150 mm, the diameter of the air injection pipe 80 is desirably 50 mm. Moreover, it is preferable that the atmosphere release valve 15 and the air injection valve 88 are valves that can be fully opened and fully closed, and the opening area when fully opened is approximately equal to that of the atmosphere release pipe 16 and the air injection pipe 80. In addition, since the air injection valve 88 to be used is for pressurized air, an electromagnetic valve may be used, but a specification with little pressure loss is preferable. Furthermore, it is important that the air release pipe 16 and the air injection pipe 80 are connected to the suction transport pipe 2 at a predetermined angle, preferably 50 to 70 degrees, with respect to the horizontal plane. This is because even if a solid matter of a solid-liquid mixture, that is, sedimentation, slightly enters each pipe, it is easily re-sucked into the suction transport pipe 2 by its angle of repose so that no pressure loss in operation occurs. This is to enable atmospheric suction or pressurized air injection.

空気注入弁８８を開とした時、吸引輸送管２に加圧空気がスムーズに、一気に注入され、大気開放管１６の接続部１６ａまでピストン流的に固液混合体を押し上げてしまうことが、長い輸送用水柱を形成するのに好ましい。この場合、第１，第２の実施形態でも、真空装置１２により吸引輸送管２内に吸引される固液混合体の水位(高さ)は、同じ真空度が作用するのであれば同程度になる。しかし、第２の実施形態では、沈砂池１内に設けた空気注入管８０からの加圧空気を数秒間以下の、極く短時間注入し、吸引されていた固液混合体をピストン流的に一気に押上げることで、より沈砂濃度の高い、長い輸送用水柱を形成させている。   When the air injection valve 88 is opened, the pressurized air is smoothly injected into the suction transport pipe 2 at once, and the solid-liquid mixture is pushed up to the connection portion 16a of the atmosphere release pipe 16 in a piston flow. It is preferable for forming a long water column for transportation. In this case, also in the first and second embodiments, the water level (height) of the solid-liquid mixture sucked into the suction transport pipe 2 by the vacuum device 12 is the same as long as the same degree of vacuum acts. Become. However, in the second embodiment, pressurized air from the air injection pipe 80 provided in the sand basin 1 is injected for a very short time of several seconds or less, and the sucked solid-liquid mixture is piston-flowed. By pushing up at once, a long water column for transportation with higher sedimentation concentration is formed.

空気注入弁８８を閉とすると同時に、大気開放弁１５を開とし、大気開放管１６の接続部１６ａまで押し上げられた固液混合体の下部に、すなわち大気開放管１６の接続部１６ａに、大気圧の空気がスムーズに、一気に吸引され、該接続部１６ａより上方の固液混合体をピストン流的に、固液回収タンク１０の真空圧の作用により吸引して、輸送用水柱を形成させる。これらの加圧空気の注入、および大気圧の空気吸引がスムーズに、短時間に、一気にピストン流的に行われることが遅れるほど、形成される輸送用水柱内には空気が入り込み易くなり、ピストン流的に輸送されにくくなり、輸送用水柱の形状の崩れ、すなわち、沈砂と水の分離が進むことになる。   At the same time that the air injection valve 88 is closed, the atmosphere release valve 15 is opened, and a large amount is placed below the solid-liquid mixture pushed up to the connection portion 16a of the atmosphere release pipe 16, that is, to the connection portion 16a of the atmosphere release pipe 16. Air at atmospheric pressure is sucked smoothly and all at once, and the solid-liquid mixture above the connecting portion 16a is sucked in a piston flow by the action of the vacuum pressure of the solid-liquid recovery tank 10 to form a water column for transportation. The longer the injection of pressurized air and the air suction at atmospheric pressure is smoothly performed in a short time in a single piston flow, the more easily air enters the transport water column that is formed. It becomes difficult to be transported fluidly, and the shape of the water column for transportation collapses, that is, the sand and water are separated.

固液混合体の吸引工程は大気開放弁１５の全閉および空気注入弁８８の全閉により開始し、空気注入弁８８の開動作開始で終了とする。輸送用水柱形成工程は空気注入弁８８の開動作開始で開始し、空気注入弁８８の閉動作完了で終了とする。輸送工程は大気開放弁１５の開動作開始で始まる。この時、空気注入弁８８は閉動作中、または閉動作が完了している。   The solid-liquid mixture suction step starts when the air release valve 15 is fully closed and the air injection valve 88 is fully closed, and ends when the air injection valve 88 starts to open. The transport water column forming step starts when the air injection valve 88 starts to open and ends when the air injection valve 88 closes. The transportation process starts with the start of the opening operation of the atmosphere release valve 15. At this time, the air injection valve 88 is closed or has been closed.

上述した輸送用水柱５０ａの形成と輸送の繰り返しを５０回から１５０回行うと、図１３に示すように、固液回収タンク１０は満水状態となる。なお、沈砂量、固液回収タンク容量が大きくなれば繰り返し回数も多くなる。固液回収タンク１０が満水状態となると、制御部９０は、大気開放弁１５、空気注入弁８８、吸引輸送弁４５をはじめとする弁や真空装置１２、コンプレッサ８４などの運転を停止する。   When the formation of the transportation water column 50a and the transportation are repeated 50 to 150 times, the solid-liquid recovery tank 10 becomes full as shown in FIG. Note that the number of repetitions increases as the amount of sedimentation and the solid-liquid recovery tank capacity increase. When the solid-liquid recovery tank 10 becomes full, the control unit 90 stops the operation of the valves including the air release valve 15, the air injection valve 88, the suction transport valve 45, the vacuum device 12, and the compressor 84.

固液回収タンク１０の下部に沈砂が沈降した後、固液回収タンク１０に取り付けられた上澄水排出弁９２および換気弁９４を開き、固液回収タンク１０内の上澄水を排出する。その後、上澄水排出弁９２を閉じ、固液回収タンク１０の底部に設けられた空気洗浄弁９６を開くことで、コンプレッサ８４からの空気を固液回収タンク１０の内部に送り込み、沈砂の空気洗浄を行う。次に、空気洗浄弁９６を閉じ、水洗浄弁９８を開き、沈砂の水洗浄を行う。水洗浄の終了後は水洗浄弁９８を閉じる。そして、再度、上澄水排出弁９２を開いた後、底部に設けられた沈砂排出弁１０ａを開いて、固液回収タンク１０内の砂を水とともに排出する。   After the settling of sand has settled in the lower part of the solid / liquid recovery tank 10, the supernatant water discharge valve 92 and the ventilation valve 94 attached to the solid / liquid recovery tank 10 are opened, and the supernatant water in the solid / liquid recovery tank 10 is discharged. Thereafter, the supernatant water discharge valve 92 is closed and the air washing valve 96 provided at the bottom of the solid / liquid recovery tank 10 is opened, so that the air from the compressor 84 is sent into the solid / liquid collection tank 10 and the sand is washed with air. I do. Next, the air washing valve 96 is closed, the water washing valve 98 is opened, and the sand is washed with water. After the water cleaning is completed, the water cleaning valve 98 is closed. Then, after opening the supernatant water discharge valve 92 again, the sand settling discharge valve 10a provided at the bottom is opened, and the sand in the solid-liquid recovery tank 10 is discharged together with water.

例えば、固液回収タンク１０の１杯分の有効容量（沈砂と水との全量）１．０ｍ３当たり、０．２〜０．３５ｍ３、通常０．３ｍ３程度の沈砂を排出する。沈砂の排出が終了した後、必要に応じて再び揚砂輸送操作を開始する。 For example, one cup of effective capacity (the total amount of sand and water) 1.0 m 3 per solid-liquid recovery tank 10, 0.2~0.35m 3, to discharge the usual 0.3 m 3 approximately sand. After discharging the settling sand, start the sand transport operation again if necessary.

なお、制御部９０が大気開放弁１５を開くとともに空気注入弁８８を閉じるときには、吸引輸送管２内の固液混合体の水位は大気開放管１６の接続部１６ａよりも上方にある必要がある。また、制御部９０が大気開放弁１５および空気注入弁８８を開閉するタイミングは、通常、時間によって制御するが、固液回収タンク１０の真空度を測定するセンサや吸引輸送管２の水位を測定するセンサの出力を用いて補助制御してもよい。   When the control unit 90 opens the atmosphere release valve 15 and closes the air injection valve 88, the water level of the solid-liquid mixture in the suction transport pipe 2 needs to be above the connection part 16a of the atmosphere release pipe 16. . The timing at which the controller 90 opens and closes the atmosphere release valve 15 and the air injection valve 88 is normally controlled by time, but the sensor for measuring the degree of vacuum of the solid-liquid recovery tank 10 and the water level of the suction transport pipe 2 are measured. Auxiliary control may be performed using the output of the sensor.

制御部９０は、空気注入弁８８および大気開放弁１５の開時間と閉時間の設定、そのタイミング、これら弁開閉の速度、全開全閉の確認、差圧検出器５７，７０，圧力センサ７５からの信号、固液回収タンク１０の真空度による真空装置１２の運転制御などを行うとともに、他の必要な制御機能を同時に有していてもよい。   The control unit 90 sets the opening time and closing time of the air injection valve 88 and the atmospheric release valve 15, the timing thereof, the speed of opening and closing these valves, the confirmation of full opening and closing, the differential pressure detectors 57 and 70, and the pressure sensor 75. In addition, the operation control of the vacuum device 12 based on the degree of vacuum of the solid-liquid recovery tank 10 may be performed, and other necessary control functions may be simultaneously provided.

本発明の第２の実施形態によれば、吸引輸送弁４５を全閉とした状態で、空気注入管８０から吸引輸送管２の開口部２ａに向かって加圧空気を送り込む操作により、必要に応じて吸引輸送管２の開口部２ａ近傍の沈砂などを吹き払うことができ、開口部２ａの目詰まりを防止することができる。   According to the second embodiment of the present invention, the operation is performed by sending pressurized air from the air injection pipe 80 toward the opening 2a of the suction transport pipe 2 with the suction transport valve 45 fully closed. Accordingly, it is possible to blow away sand sediments in the vicinity of the opening 2a of the suction transport pipe 2, and clogging of the opening 2a can be prevented.

また、吸引輸送弁４５、大気開放弁１５、空気注入弁８８を閉じ、運転開始前に、事前に真空装置１２を駆動し、固液回収タンク１０と吸引輸送管６の吸引輸送弁４５までの真空度を所定値にしておくことにより、真空形成のための時間を省略することができ、直ちに本運転を行うことができる。   In addition, the suction transport valve 45, the atmosphere release valve 15, and the air injection valve 88 are closed, and before starting the operation, the vacuum device 12 is driven in advance to reach the solid-liquid recovery tank 10 and the suction transport valve 45 of the suction transport pipe 6. By setting the degree of vacuum to a predetermined value, the time for forming a vacuum can be omitted, and the main operation can be performed immediately.

図１３に示すように、空気注入管８０に、吸引輸送管２内に一気に空気を送り込むためにコンプレッサ８４からの空気を貯留しておくための補助空気槽９９を設けてもよい。この補助空気槽９９は、吸引輸送管２の空気注入管８０の接続部８０ａから大気開放管１６の接続部１６ａまでの長さに対応する容量の１．０〜２．０倍の容積を有していることが好ましい。この補助空気槽９９には、輸送用水柱の輸送時間（２〜１０秒間）の間に空気を溜めればよい。さらに、一定容量の補助空気槽９９を設ければ、補助空気槽９９に空気を注入するコンプレッサ８４からの圧力を調整することにより、１回に注入する空気量を容易に制御することができる。   As shown in FIG. 13, an auxiliary air tank 99 for storing air from the compressor 84 in order to send air into the suction transport pipe 2 at a stroke may be provided in the air injection pipe 80. This auxiliary air tank 99 has a volume of 1.0 to 2.0 times the capacity corresponding to the length from the connection part 80a of the air injection pipe 80 of the suction transport pipe 2 to the connection part 16a of the atmosphere release pipe 16. It is preferable. Air may be stored in the auxiliary air tank 99 during the transportation time (2 to 10 seconds) of the water column for transportation. Furthermore, if the auxiliary air tank 99 having a certain capacity is provided, the amount of air injected at a time can be easily controlled by adjusting the pressure from the compressor 84 that injects air into the auxiliary air tank 99.

このように、第２の実施形態によれば、補助空気槽９９から吸引輸送管２内に一気に空気を送り込むことによって、空気注入管８０の接続部８０ａの上方の固液混合体を、吸引輸送管２の空気注入管８０の接続部８０ａから大気開放管１６の接続部１６ａまでの長さ分程度、押し上げることができる。これにより、大気開放管１６の接続部１６ａよりも上方に、第１の実施形態における輸送用水柱よりも長い輸送用水柱を形成させることができる。このように第２の実施形態においては、１回で輸送される輸送用水柱を長くすることができるため、効率的な揚砂輸送を実現することができる。   Thus, according to the second embodiment, the solid-liquid mixture above the connection portion 80a of the air injection pipe 80 is sucked and transported by sending air from the auxiliary air tank 99 into the suction transport pipe 2 at a stretch. The pipe 2 can be pushed up by the length from the connection part 80a of the air injection pipe 80 to the connection part 16a of the atmosphere release pipe 16. Thereby, the water column for transportation longer than the water column for transportation in 1st Embodiment can be formed above the connection part 16a of the atmospheric | air release pipe | tube 16. Thus, in 2nd Embodiment, since the water column for transportation conveyed at once can be lengthened, efficient sand transport can be implement | achieved.

図１４は、本発明の第３の実施形態における揚砂輸送装置の構成を示す模式図である。なお、特に説明しない第３の実施形態の構成および動作は、上述した第１及び２の実施形態と同様であり、その重複する説明を省略する。図１４に示すように、第３の吸引輸送管６からは、第４の吸引輸送管１００が分岐している。この吸引輸送管１００は沈砂池１まで鉛直方向に延びており、その先端の開口部１００ａは水中に没している。吸引輸送管１００の開口部１００ａの周囲には、複数の水噴射ノズル１０２が配置されている。この水噴射ノズル１０２は、水噴射ノズル２２と同様の機能を有している。   FIG. 14 is a schematic diagram showing the configuration of the sand transporting apparatus according to the third embodiment of the present invention. Note that the configuration and operation of the third embodiment not specifically described are the same as those of the first and second embodiments described above, and redundant description thereof is omitted. As shown in FIG. 14, a fourth suction transport pipe 100 branches from the third suction transport pipe 6. The suction transport pipe 100 extends in the vertical direction to the sand basin 1, and the opening 100a at the tip thereof is submerged in water. A plurality of water jet nozzles 102 are arranged around the opening 100 a of the suction transport pipe 100. The water injection nozzle 102 has the same function as the water injection nozzle 22.

吸引輸送管１００は吸引輸送管２に隣接して配置されている。吸引輸送管１００の口径は、吸引輸送管６の口径と同じであり、かつ吸引輸送管２の口径よりも小さい。吸引輸送管６の下部６ｃおよびレジューサー５Ｂは斜めに延びている。吸引輸送管１００には、吸引輸送弁１０４が設けられている。この吸引輸送弁１０４は、上述の吸引輸送弁４５と同様の構成を有している。吸引輸送弁１０４は、吸引輸送管６と吸引輸送管１００との接続部１０６の下方に位置している。吸引輸送管１００には、第１の実施形態と同様に、大気開放管１１０および大気開放弁１１２が接続されている。さらに、第２の実施形態と同様に、吸引輸送管１００には、空気注入管１１４および空気注入弁１１６が連結されている。図示しないが、空気注入弁８８，１１６には第２の実施形態と同様にコンプレッサが接続されている。なお、これら空気注入管８０，１１４および空気注入弁８８，１１６は、第１の実施形態のように設けなくてもよい。   The suction transport pipe 100 is disposed adjacent to the suction transport pipe 2. The diameter of the suction transport pipe 100 is the same as the diameter of the suction transport pipe 6 and is smaller than the diameter of the suction transport pipe 2. The lower part 6c of the suction transport pipe 6 and the reducer 5B extend obliquely. The suction transport pipe 100 is provided with a suction transport valve 104. The suction transport valve 104 has the same configuration as the suction transport valve 45 described above. The suction transport valve 104 is located below the connecting portion 106 between the suction transport pipe 6 and the suction transport pipe 100. Similarly to the first embodiment, an atmosphere release pipe 110 and an atmosphere release valve 112 are connected to the suction transport pipe 100. Further, similarly to the second embodiment, an air injection pipe 114 and an air injection valve 116 are connected to the suction transport pipe 100. Although not shown, a compressor is connected to the air injection valves 88 and 116 as in the second embodiment. The air injection pipes 80 and 114 and the air injection valves 88 and 116 may not be provided as in the first embodiment.

このような構成の揚砂輸送装置を用いて沈砂池１の池底に堆積した沈砂を引き上げる場合の動作について説明する。まず、大気開放弁１５，１１２、空気注入弁８８，１１６、および吸引輸送弁４５，１０４を閉じた状態で真空装置１２を駆動する。これにより、真空装置１２が接続された固液回収タンク１０および吸引輸送弁４５，１０４から固液回収タンク１０までの吸引輸送管６，１００の内部を、例えば−４９．０ｋＰａ（−５ｍＡｑ）程度まで減圧する。   An operation in the case where the sedimentation sediment deposited on the bottom of the sedimentation basin 1 is pulled up using the sand transporting device having such a configuration will be described. First, the vacuum device 12 is driven in a state in which the atmosphere release valves 15 and 112, the air injection valves 88 and 116, and the suction transport valves 45 and 104 are closed. As a result, the inside of the suction / transport pipe 6 and 100 from the solid / liquid recovery tank 10 to which the vacuum device 12 is connected and the suction / transport valves 45 and 104 to the solid / liquid recovery tank 10 is about −49.0 kPa (−5 mAq), for example. Depressurize until.

この吸引輸送弁４５，１０４は、いずれか一方を開放することができ、吸引輸送弁４５または吸引輸送弁１０４の一方を開放することで吸引輸送管６または吸引輸送管１００の一方が固液混合体を吸引する。したがって、固液回収タンク１０の真空度が目標とする値となったら、吸引輸送弁４５または吸引輸送弁１０４の一方を急開することで、固液混合体が吸引輸送管２または吸引輸送管１００のいずれかに吸引される。例えば沈砂池１内の沈砂のサイズが小さければ吸引輸送管１００のみを使用し、沈砂池１内に大きなサイズの沈砂が含まれていれば吸引輸送管２を使用することができる。図１４に示す構成では、使用する吸引輸送管を適宜選択できるため、固液混合体をより小さな動力で吸引することができる。すなわち、沈砂池１内に小さなサイズの沈砂しかない場合、このような沈砂と水とが混合された固液混合体が吸引輸送管２により輸送されることは、使用する動力の無駄になる。そこで、第３の実施形態では、沈砂のサイズに応じて使用する吸引輸送管を選択することにより、最小限の動力で固液混合体を輸送することができる。このとき、必要に応じて水噴射ノズル２２または水噴射ノズル１０２から水噴射を行い、沈砂を流動化し、開口部２ａまたは開口部１００ａから沈砂を吸引しやすいようにする。   Either one of the suction transport valves 45 and 104 can be opened. When one of the suction transport valve 45 or the suction transport valve 104 is opened, one of the suction transport pipe 6 or the suction transport pipe 100 is mixed with the liquid. Aspirate the body. Therefore, when the degree of vacuum of the solid-liquid recovery tank 10 reaches the target value, the solid-liquid mixture is sucked into the suction transport pipe 2 or the suction transport pipe by rapidly opening one of the suction transport valve 45 or the suction transport valve 104. Aspirated into any of 100. For example, if the size of the settling sand in the settling basin 1 is small, only the suction transport pipe 100 can be used, and if the settling sand basin 1 contains large size settling sand, the suction transport pipe 2 can be used. In the configuration shown in FIG. 14, since the suction transport pipe to be used can be selected as appropriate, the solid-liquid mixture can be sucked with smaller power. In other words, when there is only a small size sand settling in the sand settling basin 1, the transport of the solid-liquid mixture in which such sand settling and water are mixed by the suction transport pipe 2 is a waste of power to be used. Therefore, in the third embodiment, the solid-liquid mixture can be transported with the minimum power by selecting the suction transport pipe to be used according to the size of the sedimentation. At this time, if necessary, water is jetted from the water jet nozzle 22 or the water jet nozzle 102 to fluidize the sand and make it easy to suck the sand from the opening 2a or the opening 100a.

輸送用水柱の形成、及び移送は、第２の実施形態と同様に行われる。以下、吸引輸送管１００を通じて沈砂を輸送する例について説明するが、吸引輸送管２を用いる場合も同様である。まず、空気注入弁１１６を開いて、沈砂池１の水位よりも高い圧力、例えば２０ｋＰａ〜５０ｋＰａの加圧空気を吸引輸送管１００の内部に注入する。これにより、空気注入管１１４の接続部１１４ａよりも上方の固液混合体を、大気開放管１１０の接続部１１０ａの近傍またはそれよりも上方に上昇させる。   Formation and transfer of the water column for transportation are performed in the same manner as in the second embodiment. Hereinafter, although the example which conveys sedimentation through the suction conveyance pipe | tube 100 is demonstrated, the case where the suction conveyance pipe | tube 2 is used is the same. First, the air injection valve 116 is opened, and a pressure higher than the water level of the sand basin 1, for example, pressurized air of 20 kPa to 50 kPa is injected into the suction transport pipe 100. Thereby, the solid-liquid mixture above the connection part 114a of the air injection pipe 114 is raised in the vicinity of or above the connection part 110a of the atmosphere release pipe 110.

次いで、大気開放弁１１２を開くとともに空気注入弁１１６を閉じ、大気開放管１１０の接続部１１０ａを大気開放することにより、図１２に示すような長い輸送用水柱５０ａが形成される。この長い輸送用水柱５０ａは、固液回収タンク１０側の端部に作用する真空圧と大気開放側の端部に作用する大気圧との圧力差により、固液回収タンク１０に向かって移動し輸送される。本実施形態においても、図６に示す圧力センサ５５、差圧検出器５７、図７に示す圧力センサ６０、差圧検出器７０、図９に示す圧力センサ７５を適用することができる。   Next, the atmosphere release valve 112 is opened, the air injection valve 116 is closed, and the connection 110a of the atmosphere release pipe 110 is opened to the atmosphere, thereby forming a long water column 50a for transportation as shown in FIG. This long water column for transport 50a moves toward the solid-liquid recovery tank 10 due to the pressure difference between the vacuum pressure acting on the end portion on the solid-liquid recovery tank 10 side and the atmospheric pressure acting on the end portion on the air release side. Transported. Also in this embodiment, the pressure sensor 55, the differential pressure detector 57 shown in FIG. 6, the pressure sensor 60, the differential pressure detector 70 shown in FIG. 7, and the pressure sensor 75 shown in FIG. 9 can be applied.

これまで本発明の好ましい実施形態について説明したが、本発明は上述の実施形態に限定されず、その技術的思想の範囲内において種々異なる形態にて実施されてよいことは言うまでもない。   The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and it goes without saying that the present invention may be implemented in various forms within the scope of the technical idea.

１ 沈砂池
２，５ 吸引輸送管（大口径）
２ａ 開口部（第１の端部）
５Ａ 沈砂堆積部
５Ｂ レジューサー（漸縮管）
５ａ，５ｂ，５ｃ，５ｄ エルボ管
５ｅ，５ｆ，５ｇ 横引き配管
６，１００ 吸引輸送管（通常口径）
１０ 固液回収タンク
１０ａ 沈砂排出弁
１２ 真空装置
１５，１１２ 大気開放弁
１６，１１０ 大気開放管
２０，９０ 制御部
２７ リング（オリフィス）
３０ ハンドホール
３５ 洗浄水供給口
４０ 自動沈砂除去装置
４５，１０４ 吸引輸送弁
５０ 固液混合体
５０ａ 輸送用水柱
５５，６０，７５ 圧力センサ
５７，７０ 差圧検出器
８０，１１４ 空気注入管
８２ 減圧弁
８４ コンプレッサ
８８，１１６ 空気注入弁
９２ 上澄水排出弁
９４ 換気弁
９６ 空気洗浄弁
９８ 水洗浄弁
９９ 補助空気槽 1 Sedimentation basin 2, 5 Suction transport pipe (large diameter)
2a Opening (first end)
5A Sand sedimentation part 5B Reducer (reducing pipe)
5a, 5b, 5c, 5d Elbow pipe 5e, 5f, 5g Horizontally drawn pipe 6,100 Suction transport pipe (normal diameter)
DESCRIPTION OF SYMBOLS 10 Solid-liquid collection | recovery tank 10a Sand sediment discharge valve 12 Vacuum apparatus 15,112 Atmospheric release valve 16,110 Atmospheric release pipe 20,90 Control part 27 Ring (orifice)
30 Hand hole 35 Washing water supply port 40 Automatic sand removal device 45, 104 Suction transport valve 50 Solid-liquid mixture 50a Transport water column 55, 60, 75 Pressure sensor 57, 70 Differential pressure detector 80, 114 Air injection pipe 82 Depressurization Valve 84 Compressor 88, 116 Air injection valve 92 Supernatant water discharge valve 94 Ventilation valve 96 Air washing valve 98 Water washing valve 99 Auxiliary air tank

Claims (12)

固液回収タンクと、
沈砂池の水中に没される開口部を有する第１の吸引輸送管と、
前記第１の吸引輸送管に接続された第２の吸引輸送管と、
一端部が前記第２の吸引輸送管に接続され、他端部が前記固液回収タンクに接続された第３の吸引輸送管と、
前記固液回収タンク、前記第１の吸引輸送管、前記第２の吸引輸送管、および前記第３の吸引輸送管の内部を減圧する減圧装置と、
前記沈砂池の最高水位よりも上方の位置で前記第１の吸引輸送管に接続された大気開放管と、
前記大気開放管を通じて前記第１の吸引輸送管の前記大気開放管との接続部を大気開放するための大気開放弁と、
前記大気開放弁を閉じて前記沈砂池に堆積した沈砂を水とともに固液混合体として前記第１の吸引輸送管内に吸引し、その水位が前記大気開放管との接続部よりも上方に上昇したときに前記大気開放弁を開くことにより前記接続部よりも上方に輸送用水柱を形成し、前記輸送用水柱に作用する大気圧と前記固液回収タンクの真空度との差により前記輸送用水柱を前記固液回収タンクに輸送し、前記輸送用水柱の全体が前記固液回収タンクに入る直前に前記大気開放弁を閉じ、前記大気開放弁の開閉を繰り返すことにより前記輸送用水柱の形成と輸送とを繰り返す制御部とを備え、
前記第１の吸引輸送管は、前記第３の吸引輸送管の口径よりも大きい口径を有し、
前記第２の吸引輸送管は、前記第１の吸引輸送管の口径と同じ又はそれよりも大きい口径を有する沈砂堆積部と、前記沈砂堆積部の下流側に配置された漸縮管とを有し、
前記沈砂堆積部は、複数のエルボ管と複数の横引き配管とにより渦巻き状に構成されていることを特徴とする揚砂輸送装置。 A solid-liquid recovery tank;
A first suction transport pipe having an opening that is submerged in the water of the sand basin;
A second suction transport pipe connected to the first suction transport pipe;
A third suction transport pipe having one end connected to the second suction transport pipe and the other end connected to the solid-liquid recovery tank;
A decompression device that decompresses the interior of the solid-liquid recovery tank, the first suction transport pipe, the second suction transport pipe, and the third suction transport pipe;
An atmospheric open pipe connected to the first suction transport pipe at a position above the highest water level of the sand basin;
An atmosphere release valve for releasing the connection between the first suction transport pipe and the atmosphere release pipe through the atmosphere release pipe;
The air release valve was closed and the sediment deposited in the sand basin was sucked into the first suction transport pipe as a solid-liquid mixture with water, and the water level rose above the connection with the air release pipe. Sometimes the transport water column is formed above the connection portion by opening the atmosphere release valve, and the transport water column is determined by the difference between the atmospheric pressure acting on the transport water column and the degree of vacuum of the solid-liquid recovery tank. Forming the transport water column by closing the air release valve and repeating opening and closing of the air release valve immediately before the entire water column for transport enters the solid liquid recovery tank. A control unit that repeats transportation,
The first suction transport pipe has a diameter larger than the diameter of the third suction transport pipe,
The second suction transport pipe has a sand settling part having a diameter equal to or larger than the diameter of the first suction transport pipe, and a tapered pipe disposed downstream of the sand settling part. And
The sand sediment transporting device is characterized in that the sand sedimentation portion is formed in a spiral shape by a plurality of elbow pipes and a plurality of horizontal pipes . 固液回収タンクと、
沈砂池の水中に没される開口部を有する第１の吸引輸送管と、
前記第１の吸引輸送管に接続された第２の吸引輸送管と、
一端部が前記第２の吸引輸送管に接続され、他端部が前記固液回収タンクに接続された第３の吸引輸送管と、
前記固液回収タンク、前記第１の吸引輸送管、前記第２の吸引輸送管、および前記第３の吸引輸送管の内部を減圧する減圧装置と、
前記沈砂池の最高水位よりも上方の位置で前記第１の吸引輸送管に接続された大気開放管と、
前記大気開放管を通じて前記第１の吸引輸送管の大気開放管との接続部を大気開放するための大気開放弁と、
前記第１の吸引輸送管に接続された空気注入管と、
前記第１の吸引輸送管の内部に空気を送り込む空気移送装置と、
前記空気注入管を通じて前記空気移送装置によって前記第１の吸引輸送管の前記空気注入管との接続部から空気を前記吸引輸送管の内部に注入するための空気注入弁と、
前記大気開放弁および前記空気注入弁を閉じて前記沈砂池に堆積した沈砂を水とともに固液混合体として前記第１の吸引輸送管内に吸引し、その水位が前記沈砂池の水位よりも上方に上昇したときに前記空気注入弁を開くことにより前記空気注入管との接続部より上方の固液混合体を上方に押し上げ、前記大気開放弁を開くとともに前記空気注入弁を閉じることにより前記大気開放管との接続部よりも上方に輸送用水柱を形成し、前記輸送用水柱に作用する大気圧と前記固液回収タンクの真空度との差により前記輸送用水柱を前記固液回収タンクに輸送し、前記輸送用水柱の全体が前記固液回収タンクに入る直前に前記大気開放弁を閉じ、前記大気開放弁および前記空気注入弁の開閉を繰り返すことにより前記輸送用水柱の形成と輸送とを繰り返す制御部とを備え、
前記第１の吸引輸送管は、前記第３の吸引輸送管の口径よりも大きい口径を有し、
前記第２の吸引輸送管は、前記第１の吸引輸送管の口径と同じ又はそれよりも大きい口径を有する沈砂堆積部と、前記沈砂堆積部の下流側に配置された漸縮管とを有し、
前記沈砂堆積部は、複数のエルボ管と複数の横引き配管とにより渦巻き状に構成されていることを特徴とする揚砂輸送装置。 A solid-liquid recovery tank;
A first suction transport pipe having an opening that is submerged in the water of the sand basin;
A second suction transport pipe connected to the first suction transport pipe;
A third suction transport pipe having one end connected to the second suction transport pipe and the other end connected to the solid-liquid recovery tank;
A decompression device that decompresses the interior of the solid-liquid recovery tank, the first suction transport pipe, the second suction transport pipe, and the third suction transport pipe;
An atmospheric open pipe connected to the first suction transport pipe at a position above the highest water level of the sand basin;
An atmosphere release valve for releasing the connection between the first suction transport pipe and the atmosphere release pipe through the atmosphere release pipe;
An air injection pipe connected to the first suction transport pipe;
An air transfer device for sending air into the first suction transport pipe;
An air injection valve for injecting air from the connecting portion of the first suction transport pipe with the air injection pipe through the air injection pipe into the suction transport pipe;
The air release valve and the air injection valve are closed, and the sand deposited in the sand basin is sucked into the first suction transport pipe together with water as a solid-liquid mixture, and the water level is higher than the water level of the sand basin. Opening the air injection valve when it rises, pushes the solid-liquid mixture above the connection with the air injection pipe upward, opens the atmosphere release valve and closes the air injection valve to release the atmosphere A transport water column is formed above the connection with the pipe, and the transport water column is transported to the solid-liquid recovery tank by the difference between the atmospheric pressure acting on the transport water column and the degree of vacuum of the solid-liquid recovery tank The transport water column is formed and transported by closing the air release valve immediately before the entire transport water column enters the solid-liquid recovery tank and repeatedly opening and closing the air release valve and the air injection valve. Repetitive And a control unit to return,
The first suction transport pipe has a diameter larger than the diameter of the third suction transport pipe,
The second suction transport pipe has a sand settling part having a diameter equal to or larger than the diameter of the first suction transport pipe, and a tapered pipe disposed downstream of the sand settling part. And
The sand sediment transporting device is characterized in that the sand sedimentation portion is formed in a spiral shape by a plurality of elbow pipes and a plurality of horizontal pipes . 前記第１の吸引輸送管の口径は、前記第３の吸引輸送管の口径の１．５〜２．５倍であることを特徴とする請求項１または２に記載の揚砂輸送装置。   3. The sand transporting apparatus according to claim 1, wherein a diameter of the first suction transport pipe is 1.5 to 2.5 times a diameter of the third suction transport pipe. 前記沈砂堆積部は、水平方向に延びることを特徴とする請求項１乃至３のいずれか一項に記載の揚砂輸送装置。   The sand-carrying apparatus according to any one of claims 1 to 3, wherein the sand sedimentation portion extends in a horizontal direction. 前記第２の吸引輸送管と前記第３の吸引輸送管との間には、前記第３の吸引輸送管の口径よりも小さい内径を有するオリフィスが配置されていることを特徴とする請求項１乃至４のいずれか一項に記載の揚砂輸送装置。   2. An orifice having an inner diameter smaller than the diameter of the third suction transport pipe is disposed between the second suction transport pipe and the third suction transport pipe. The sand transporting apparatus according to any one of claims 1 to 4. 前記沈砂堆積部の容積は、前記第３の吸引輸送管の断面積に該第３の吸引輸送管の長さ２ｍ〜１０ｍ分を乗じて得られる容積に等しいことを特徴とする請求項１乃至５のいずれか一項に記載の揚砂輸送装置。   The volume of the sand sedimentation portion is equal to a volume obtained by multiplying a cross-sectional area of the third suction transport pipe by a length of 2 m to 10 m of the third suction transport pipe. The sand transporting apparatus according to claim 5. 前記沈砂堆積部は、堆積した沈砂を除去するためのハンドホールを備えたことを特徴とする請求項１乃至６のいずれか一項に記載の揚砂輸送装置。   The sand-carrying unit according to any one of claims 1 to 6, wherein the sand-carrying portion includes a hand hole for removing the accumulated sediment. 前記沈砂堆積部には、堆積した沈砂を除去するための自動沈砂除去装置が接続されていることを特徴とする請求項１乃至７のいずれか一項に記載の揚砂輸送装置。   The sand sediment transporting device according to any one of claims 1 to 7, wherein an automatic sand sediment removal device for removing the accumulated sand sediment is connected to the sand sediment accumulation unit. 前記沈砂堆積部内の沈砂堆積量を検出する沈砂堆積量検出器をさらに備えたことを特徴とする請求項１乃至８のいずれか一項に記載の揚砂輸送装置。   The sand transporting apparatus according to any one of claims 1 to 8, further comprising a sand sediment accumulation amount detector for detecting a sand sediment accumulation amount in the sand sediment accumulation section. 前記沈砂堆積量検出器は、前記第２の吸引輸送管の入口圧力と出口圧力との差から沈砂堆積量を検出することを特徴とする請求項９に記載の揚砂輸送装置。   The sand sediment transportation apparatus according to claim 9, wherein the sand sediment accumulation amount detector detects a sand sediment accumulation amount from a difference between an inlet pressure and an outlet pressure of the second suction transport pipe. 前記第３の吸引輸送管から分岐し、前記沈砂池の内部まで延びる第４の吸引輸送管をさらに備えたことを特徴とする請求項１乃至１０のいずれか一項に記載の揚砂輸送装置。   11. The sand transporting apparatus according to claim 1, further comprising a fourth suction transport pipe that branches off from the third suction transport pipe and extends to the inside of the sand basin. . 沈砂池に堆積した沈砂を真空吸引により液体とともに揚砂し、回収するための揚砂輸送装置において、
前記沈砂池内の水中に一端部が没された第１の吸引輸送管と、
前記第１の吸引輸送管の他端部に接続され、複数のエルボ管および複数の横引き配管により渦巻き状に構成された第２の吸引輸送管と、
一端部が前記第２の吸引輸送管に接続された第３の吸引輸送管と、
前記第３の吸引輸送管の他端部に接続された固液回収タンクと、
前記固液回収タンクに接続された真空装置と、を備え、
前記第１の吸引輸送管は、前記第３の吸引輸送管の口径よりも大きい口径を有していることを特徴とする揚砂輸送装置。 In a sand transporting device for lifting and collecting sand collected in a sand basin with liquid by vacuum suction,
A first suction transport pipe having an end Botsusa in water the sand Ikeuchi,
Which is connected to the other end of the first suction transport tube, and a second suction transport tube configured more spirally plurality of elbow pipe and a plurality of lateral pulling piping,
A third suction transport pipe having one end connected to the second suction transport pipe;
A solid-liquid recovery tank connected to the other end of the third suction transport pipe;
A vacuum device connected to the solid-liquid recovery tank ,
The sand transporting apparatus according to claim 1, wherein the first suction transport pipe has a diameter larger than that of the third suction transport pipe .
JP2011282778A 2011-12-26 2011-12-26 Sand transport equipment Active JP5854822B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011282778A JP5854822B2 (en) 2011-12-26 2011-12-26 Sand transport equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011282778A JP5854822B2 (en) 2011-12-26 2011-12-26 Sand transport equipment

Publications (3)

Publication Number Publication Date
JP2013132570A JP2013132570A (en) 2013-07-08
JP2013132570A5 JP2013132570A5 (en) 2014-07-10
JP5854822B2 true JP5854822B2 (en) 2016-02-09

Family

ID=48909662

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011282778A Active JP5854822B2 (en) 2011-12-26 2011-12-26 Sand transport equipment

Country Status (1)

Country Link
JP (1) JP5854822B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106966504A (en) * 2017-05-19 2017-07-21 陈佳霖 A kind of lamination micro unit biochemical treating tank and its workflow
CN108421284A (en) * 2018-04-16 2018-08-21 苏州清荷坊环保科技有限公司 One kind can precipitate complete water treatment facilities
CN114377475B (en) * 2022-01-26 2023-01-17 泉信技术(北京)有限公司 Solid-liquid separation device and water treatment method

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5431202B2 (en) * 1973-06-25 1979-10-05
JPS5564200A (en) * 1978-11-06 1980-05-14 Nasu Kazuhito High-head suction device
JPS6333605Y2 (en) * 1985-03-19 1988-09-07
JPH0942198A (en) * 1995-07-31 1997-02-10 Tsurumi Mfg Co Ltd Recovering device for solid-liquid mixture
JP2001280298A (en) * 2000-03-30 2001-10-10 Sumitomo Heavy Ind Ltd Earth and sand sucking device
JP2002235336A (en) * 2001-02-07 2002-08-23 Maezawa Ind Inc Dredging method of grit and dredging device
JP5058411B2 (en) * 2001-06-01 2012-10-24 前澤工業株式会社 Transfer equipment for sedimentation
JP4764671B2 (en) * 2005-08-02 2011-09-07 株式会社荏原製作所 Manhole pump device and operation method thereof
JP2007296466A (en) * 2006-04-28 2007-11-15 Kubota Corp Sludge discharge apparatus and operation method thereof
JP4782059B2 (en) * 2006-07-05 2011-09-28 水ｉｎｇ株式会社 Pumping sand transport device and pumping sand transport method
JP5213438B2 (en) * 2007-12-28 2013-06-19 水ｉｎｇ株式会社 Dried sand transport device, transported sand transport method, and relay pot

Also Published As

Publication number Publication date
JP2013132570A (en) 2013-07-08

Similar Documents

Publication Publication Date Title
JP4754462B2 (en) Sand collection device for sand basin
CN101611201B (en) Vacuum sewage system
JP4782059B2 (en) Pumping sand transport device and pumping sand transport method
MX2008014610A (en) System for cleaning an oil tank and method of cleaning an oil tank.
JP5854822B2 (en) Sand transport equipment
JP2010036151A (en) Sand pumping apparatus
JP6092571B2 (en) Sediment transport apparatus and sediment transport method
US9796003B2 (en) Dripless expanding tubes for combination truck
WO2001070566A1 (en) Apparatus for removing sediments from ballast tanks of vessels
JP5575545B2 (en) Injection type sand pumping system
KR101311000B1 (en) Apparatus and method for removing local emission and precipitated sand of underground water excavation work
JP2007111683A (en) Facility and method for pumping up sand
CN105730843B (en) A kind of slag-draining device
CN208927690U (en) Rinse sediment outflow integrated apparatus and the oil production separater using the device
JP4803818B2 (en) Sedimentation treatment equipment and sedimentation treatment method
JP2013132570A5 (en)
JP2018158277A (en) Sand lifting and conveying method and sand lifting and conveying device
JP2010242542A (en) Grit lifter and method of lifting
JP4869908B2 (en) Settlement cleaning equipment and settling method
JP2020081917A (en) Scum conveyance device
JP6196526B2 (en) Blocking prevention device for sand pipe and sand lifting device
JP5213438B2 (en) Dried sand transport device, transported sand transport method, and relay pot
JP4188780B2 (en) Cleaning device
CN104370008A (en) Tank bottom online mud discharging device
CN220160680U (en) Ore recycling device

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20140526

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20140526

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20150313

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20150324

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20150522

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

Effective date: 20151124

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20151208

R150 Certificate of patent or registration of utility model

Ref document number: 5854822

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250