JP2779888B2 - Pulsed pneumatic method and equipment for earth and sand - Google Patents
Pulsed pneumatic method and equipment for earth and sandInfo
- Publication number
- JP2779888B2 JP2779888B2 JP4326735A JP32673592A JP2779888B2 JP 2779888 B2 JP2779888 B2 JP 2779888B2 JP 4326735 A JP4326735 A JP 4326735A JP 32673592 A JP32673592 A JP 32673592A JP 2779888 B2 JP2779888 B2 JP 2779888B2
- Authority
- JP
- Japan
- Prior art keywords
- sand
- earth
- tank
- pressure
- compressed air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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- Air Transport Of Granular Materials (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、圧縮空気による土砂の
管路輸送の際、土砂を高濃度で効率的に輸送する方法及
び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for efficiently transporting soil at a high concentration when transporting the soil by compressed air.
【０００２】[0002]
【従来の技術】従来のポンプ浚渫船では、掘削した土砂
をパイプラインで輸送する場合には土砂の１０〜２０倍
の水を土砂に混合して輸送するため、土砂処分地に吐出
された浚渫土砂は脱水が完了するまで長時間を要した。
また、埋立地を浚渫地に近接して確保できないケースも
増えており、脱水処理や固化処理をした後、改めて最終
処分地までダンプトラックにより陸送するケースが増大
している。このため、出来るだけ水分の量を減らして土
砂を輸送することが要求されており、水の代わりに圧縮
空気を利用して土砂を輸送する方法が採用されつつあ
る。2. Description of the Related Art In a conventional pump dredger, when excavated earth and sand is transported by a pipeline, 10 to 20 times the amount of water of the earth and sand is mixed with the earth and sand and transported. It took a long time to complete the dehydration.
In addition, the number of cases where landfills cannot be secured in close proximity to dredging sites is increasing, and the number of cases where land treatment is carried out again by dump trucks to final disposal sites after dehydration treatment and solidification treatment is increasing. Therefore, it is required to transport the earth and sand while reducing the amount of water as much as possible, and a method of transporting the earth and sand using compressed air instead of water is being adopted.
【０００３】圧縮空気を利用して土砂を輸送する方法と
して、泥土圧送タンクを使用する方法と、泥土圧送タン
クを使用しない方法とがある。このうち前者の方法で
は、まず泥土圧送タンクの上部に設けられた投入バルブ
を開き、ホッパに投入された土砂をスクリューコンベヤ
により泥土圧送タンクにその上部まで投入し、投入バル
ブを閉めて泥土圧送タンクを密閉状態にした後に圧縮空
気を充填する。しかる後、泥土圧送タンクの下部に設け
られた圧送バルブを開いて圧縮空気を補給しつつ泥土圧
送タンクから土砂を排出し、次いで、排泥管入口付近に
設けられた空気注入口より圧縮空気を補給し排泥管を通
して土砂を輸送する。そして、泥土圧送タンクからの土
砂の排出が完了した後、圧送バルブを閉めて泥土圧送タ
ンクを密閉状態にし、大気開放バルブを開けて残留した
圧縮空気を開放する。以上の作業サイクルを１基又は２
基の泥土圧送タンクを使用して繰り返していた。[0003] As a method of transporting earth and sand using compressed air, there are a method using a mud pumping tank and a method using no mud pumping tank. In the former method, first, the charging valve provided at the upper part of the mud pumping tank is opened, and the earth and sand charged into the hopper is charged to the upper part of the mud pumping tank by the screw conveyor, and the charging valve is closed to close the mud pumping tank. Is filled with compressed air after sealing. Thereafter, the pumping valve provided at the lower part of the mud pumping tank is opened to discharge the earth and sand from the mud pumping tank while supplying compressed air, and then compressed air is supplied from the air inlet provided near the inlet of the mud pipe. Supplies and transports sediment through mud pipes. Then, after the discharge of the earth and sand from the mud pumping tank is completed, the pumping valve is closed to make the mud pumping tank closed, and the open air valve is opened to release the residual compressed air. One or two work cycles
It was repeated using the original mud pumping tank.
【０００４】また、泥土圧送タンクを使用しない方法で
は、土砂をホッパに投入し、ホッパ下部より加圧ポンプ
装置に送り込み、加圧ポンプ装置により吸引され排泥管
に送り込まれた土砂を、排泥管に取付けられた空気注入
口から注入された圧縮空気と混合した状態で排泥管を通
して土砂を輸送していた。In the method that does not use a mud pressure feeding tank, earth and sand are put into a hopper, fed into a pressure pump device from a lower portion of the hopper, and the soil sucked by the pressure pump device and sent to a mud pipe is discharged. The sediment was transported through the mud pipe while being mixed with the compressed air injected from the air inlet attached to the pipe.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、従来の
泥土圧送タンクを使用する方法では、タンクに土砂を供
給した後タンク内に圧縮空気を充填し圧縮空気とともに
土砂を排出する断続的な処理となるため、土砂の連続的
な排出ができない。また、土砂の連続的な排出を行おう
とする場合には、複数のタンクを設けておき、これらの
タンクを順次切り換える必要があるため、装置全体が大
型となり経済的に不利であった。また、特に砂分の多い
土質の場合には、空気の吹き抜けによる損失が生じた
り、土砂が運ばれずに管内に残留していく等の問題が発
生するため、輸送効率が著しく低下するという問題があ
る。また、タンクの投入口バルブ及び圧送バルブの開閉
時にバルブに付着する土砂を除去するために水洗浄が必
要となるが、洗浄水が運搬土砂に混入して余分な水量が
増加し、これにより、土性が変化したり処分地での脱水
に要する時間が増大したりする等の問題を生ずる。さら
に、タンク毎に処理を行うバッチ処理方式であるため、
土砂を排出した後にタンク内の残留圧縮空気を排出する
必要があるが、残留空気を大気に開放する際に騒音が発
生したり土砂が細かな粉塵となって飛散する等の問題が
発生する。However, in the conventional method using a mud pressure feeding tank, intermittent treatment is performed in which the tank is supplied with earth and sand, and then the tank is filled with compressed air and the earth and sand are discharged together with the compressed air. Therefore, continuous discharge of earth and sand cannot be performed. Further, in order to continuously discharge earth and sand, it is necessary to provide a plurality of tanks and sequentially switch these tanks, so that the entire apparatus becomes large and economically disadvantageous. In addition, particularly in the case of soil with a lot of sand, there is a problem that loss due to air blow-through occurs, and there is a problem that soil and sand are not carried and remain in the pipes, so that there is a problem that transport efficiency is significantly reduced. is there. In addition, water washing is required to remove soil and sand adhering to the tank when opening and closing the inlet valve of the tank and the pressure feed valve, but the washing water is mixed into the transported earth and sand, and an extra amount of water is increased. Problems such as changes in soil properties and an increase in the time required for dehydration at the disposal site occur. Furthermore, because it is a batch processing method that performs processing for each tank,
It is necessary to discharge the residual compressed air in the tank after discharging the sediment. However, when the residual air is released to the atmosphere, there are problems such as generation of noise and scattering of the sediment as fine dust.
【０００６】また、泥土圧送タンクを使用しない方法で
は、石塊、木片等の異物が輸送土砂中に混入すると加圧
ポンプ装置が閉塞する等の障害が生ずるため、土砂ホッ
パに装備されたスクリーン装置又は振動篩などにより、
異物を入念に除去する必要がある。また、砂、砂礫等の
粗粒径の土砂では、空気の吹き抜けが生じてプラグ流の
形成が困難となるため、輸送効率が著しく低下してしま
うという欠点があった。In the method that does not use the mud pressure tank, if foreign matter such as stone blocks or wood chips is mixed in the transported earth and sand, an obstacle such as blocking of the pressurizing pump device occurs. Or by vibrating sieve
Foreign matter must be carefully removed. In addition, in the case of coarse sand such as sand and gravel, since air blow-through occurs and it becomes difficult to form a plug flow, there is a disadvantage that the transport efficiency is significantly reduced.
【０００７】従って、本発明は、上述の従来技術の課題
を解決し、良好な空気圧送効率並びに運転効率を備え、
周囲の環境に害を及ぼさない、圧縮空気による土砂を管
路輸送する方法及び装置を提供することを目的とする。[0007] Accordingly, the present invention solves the above-mentioned problems of the prior art, and has good pneumatic pumping efficiency and operation efficiency.
An object of the present invention is to provide a method and an apparatus for transporting sediment by compressed air through a pipeline, which do not harm the surrounding environment.
【０００８】[0008]
【課題を解決するための手段】上述の課題は、輸送すべ
き土砂を一時的に貯留するための圧力調整槽内の正圧に
よって、土砂を該圧力調整槽から土砂排出管に供給し、
該土砂排出管に圧縮空気を断続的に供給することにより
土砂を輸送する土砂のパルス式空気圧送装置において、
前記圧力調整槽には、土砂を補充するための土砂補充用
管が連結され、該土砂補充用管には、前記圧力調整槽内
の正圧より高い圧力で土砂を圧送することができる圧入
ポンプが接続されていることを特徴とする土砂のパルス
式空気圧送装置によって解決することができる。SUMMARY OF THE INVENTION The above-described object is to supply earth and sand from the pressure adjusting tank to a sediment discharge pipe by a positive pressure in a pressure adjusting tank for temporarily storing earth and sand to be transported,
In a pulse type pneumatic pumping apparatus for sediment that transports sediment by intermittently supplying compressed air to the sediment discharge pipe,
A sediment replenishing pipe for replenishing sediment is connected to the pressure adjusting tank, and a press-in pump capable of pumping sediment to the sediment replenishing pipe at a pressure higher than a positive pressure in the pressure adjusting tank. Can be solved by a pulse-type pneumatic pumping device for earth and sand, wherein
【０００９】[0009]
【実施例】図１には、本発明のパルス式空気圧送装置１
０の全体図が示されている。まず、装置１０には、油圧
ショベル等を利用して輸送すべき土砂を投入する土砂ホ
ッパ１１が設けられている。土砂ホッパ１１は通常のも
のでよいが、圧送装置１０に異物が混入して装置が閉塞
しないように事前に異物を除去するため、土砂ホッパ１
１の上面には振動ふるいが設置されている。土砂ホッパ
１１の底部には、排出フィーダ及び圧入ポンプ１２が設
けられているが、これらは通常のものであり本発明の要
旨を構成しないので詳細な説明は省略する。土砂ホッパ
１１の底部からは圧力調整槽１４の上部に至る管１３が
延びている。土砂ホッパ１１に投入された土砂は、圧入
ポンプ１２によって管１３を介して圧力調整槽１４まで
圧送される。なお、圧入ポンプ１２は、圧力調整槽内の
土砂レベル高さが一定になると自動的に停止するように
設定されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
0 is shown. First, the apparatus 10 is provided with a sediment hopper 11 into which sediment to be transported is input using a hydraulic shovel or the like. Although the earth and sand hopper 11 may be a normal one, the soil and sand hopper 1 is used in order to remove foreign matter in advance so that foreign matter does not enter the pumping device 10 and block the device.
A vibration sieve is installed on the upper surface of 1. At the bottom of the earth and sand hopper 11, a discharge feeder and a press-fitting pump 12 are provided. However, since these are normal ones and do not constitute the gist of the present invention, detailed description is omitted. A pipe 13 extending from the bottom of the earth and sand hopper 11 to the top of the pressure adjusting tank 14 extends. The earth and sand put into the earth and sand hopper 11 is pressure-fed to a pressure adjusting tank 14 via a pipe 13 by a press-fit pump 12. The press-in pump 12 is set to stop automatically when the level of the earth and sand in the pressure adjusting tank becomes constant.
【００１０】圧力調整槽１４は、内部に土砂を一時的に
貯留して安定したプラグ流を連続的に形成することを目
的として設けられたものである。圧力調整槽１４は全体
として略円筒形の容器からなるが、その下部は土砂の排
出を容易にするため好適には漏斗状の底板１４ａで構成
されており、底板１４ａの頂点には、土砂を処分地まで
圧送するための管１５が連結されている。好適には、圧
力調整槽１４の内部には、槽内で土砂が閉塞するのを防
止するため、閉塞防止用エアノズルが設けられている。The pressure regulating tank 14 is provided for the purpose of temporarily storing earth and sand therein and continuously forming a stable plug flow. The pressure adjusting tank 14 is formed of a substantially cylindrical container as a whole, and a lower portion thereof is preferably formed of a funnel-shaped bottom plate 14a for facilitating discharge of the earth and sand. A pipe 15 for pumping to the disposal site is connected. Preferably, an air nozzle for preventing blocking is provided inside the pressure adjusting tank 14 in order to prevent earth and sand from closing in the tank.
【００１１】圧力調整槽１４の上部には又、調整槽１４
内に圧縮空気を供給するための管１６が連結されてい
る。管１６の他端には、圧縮空気を圧力調整槽１４に供
給するための圧縮空気源１７が設けられている。圧縮空
気源１７は又、管１５の適所（好適には、管１５のエル
ボ部分）に管１８を介して連結されており、管１８に
は、自動的に開閉して圧縮空気を管１５に供給するため
のパルス弁１９が設けられている。パルス弁１９は、土
砂の粒径及び含水比に応じて開閉時間間隔が予め設定さ
れたタイマにより自動的に開閉される。パルス弁１９と
しては、例えばエアシリンダ式バタフライ弁又は電磁弁
が使用される。なお、圧縮空気源１７も通常のものであ
り、それ自体は本願発明の要旨を構成しないので詳細な
説明は省略する。[0011] Above the pressure adjusting tank 14, an adjusting tank 14 is also provided.
A pipe 16 for supplying compressed air to the inside is connected. The other end of the pipe 16 is provided with a compressed air source 17 for supplying compressed air to the pressure adjusting tank 14. A source of compressed air 17 is also connected to the pipe 15 in place (preferably, the elbow portion of the pipe 15) via a pipe 18, which automatically opens and closes compressed air to the pipe 15. A pulse valve 19 for supplying is provided. The pulse valve 19 is automatically opened and closed by a timer whose opening and closing time intervals are set in advance according to the particle size and the water content of the earth and sand. As the pulse valve 19, for example, an air cylinder type butterfly valve or a solenoid valve is used. Note that the compressed air source 17 is also a normal one, and does not itself constitute the gist of the present invention, so that detailed description is omitted.
【００１２】圧力調整槽１４内には、調整槽内の圧力を
調整する圧力センサ（図示せず）が設けられている。パ
ルス弁１９並びに管１５の中間部と出口部にも、プラグ
流の状況、土砂の閉塞及び空気の吹き抜けを監視するた
めの圧力センサ（図示せず）が設けられており、圧力の
変動を監視するようになっている。次に、パルス式空気
圧送装置１０を使用して土砂を圧送する方法について説
明する。まず、油圧ショベル等により輸送すべき土砂を
ホッパ１１の中に投入する。投入された土砂は、圧入ポ
ンプ１２によって管１３を介して圧力調整槽１４まで圧
送される。圧力調整槽１４内で土砂高さが一定になると
圧入ポンプ１２は自動的に停止し、圧力調整槽１４には
土砂が送り込まれなくなるが、土砂が圧力調整槽１４か
ら排出されて土砂高さが降下すると、圧入ポンプ１２が
再び作動して土砂が圧力調整槽１４に送り込まれる。圧
力調整槽１４内に貯留された土砂は、圧縮空気源１７か
ら管１８を介して一定の時間間隔で断続的に管１５に注
入された圧縮空気（パルスエア）によって、管１５を通
って安定したプラグ流として土砂処分地まで圧送され
る。パルスエアの開閉間隔は、輸送する土砂の土質や含
水比ごとに予め設定しておく。A pressure sensor (not shown) for adjusting the pressure in the adjusting tank is provided in the pressure adjusting tank 14. Pressure sensors (not shown) for monitoring the plug flow condition, sediment clogging and air blow-through are also provided at the pulse valve 19 and the middle and outlet of the pipe 15 to monitor pressure fluctuations. It is supposed to. Next, a method of pumping earth and sand using the pulse-type pneumatic pumping device 10 will be described. First, earth and sand to be transported are put into the hopper 11 by a hydraulic excavator or the like. The injected earth and sand is pressure-fed to a pressure adjusting tank 14 via a pipe 13 by a pressure pump 12. When the sediment height in the pressure adjusting tank 14 becomes constant, the press-in pump 12 automatically stops, and the sediment is not fed into the pressure adjusting tank 14, but the sediment is discharged from the pressure adjusting tank 14 and the sediment height is reduced. When it descends, the press-in pump 12 operates again, and the earth and sand is sent into the pressure adjusting tank 14. The sediment stored in the pressure adjusting tank 14 is stabilized through the pipe 15 by the compressed air (pulsed air) intermittently injected into the pipe 15 from the compressed air source 17 via the pipe 18 at fixed time intervals. It is pumped to the landfill site as a plug flow. The pulse air opening / closing interval is set in advance for each soil property and water content of the earth and sand to be transported.
【００１３】次に、本発明の効果を実証するために行わ
れた種々の実験について説明する。まず、プラグ流の形
成及び崩壊要因の調査の把握とパルスエアによる崩壊プ
ラグ流の再生方法の確立を目的として行われた実験につ
いて説明する。実験は、容量が１．２m3の実験用圧送タ
ンクに実験用供試土を投入し、塩ビ透明管及びＳＧＰ管
からなる排送管（直径１００mm、長さ１２０ｍ）内にお
ける土砂の移動状況の観察と管内圧力の計測を行った。
実験に使用した供試土は、笠岡粘土（シルト、粘土）と
砂質土の割合がそれぞれ、９０％：１０％、７０％：３
０％、５０％：５０％の３ケース、含水比が２００％、
１００％、５０％、２５％の４ケースについて行った。
圧送タンクを使用する従来の方法では、土砂と圧縮空気
が混合した状態のまま長い土柱として輸送され、プラグ
流が形成されにくいことが観察された。これに対し、本
発明のパルスエアを使用して土砂をプラグ流として圧送
した場合には、圧送量の増加が確認できた。Next, various experiments performed to demonstrate the effects of the present invention will be described. First, an experiment conducted for the purpose of grasping the investigation of the formation and collapse factors of the plug flow and establishing a method for regenerating the collapsed plug flow by pulsed air will be described. In the experiment, the test soil was placed in a 1.2 m 3 experimental pumping tank, and the movement of the soil in a discharge pipe (diameter 100 mm, length 120 m) consisting of a transparent PVC pipe and an SGP pipe was measured. Observation and measurement of the pressure in the tube were performed.
The test soil used in the experiment had a ratio of Kasaoka clay (silt, clay) and sandy soil of 90%: 10% and 70%: 3, respectively.
0%, 50%: 3 cases of 50%, water content 200%,
The test was performed for four cases of 100%, 50%, and 25%.
In the conventional method using the pressure feeding tank, it was observed that the earth and sand and the compressed air were transported as a long earth column in a mixed state, and it was difficult to form a plug flow. In contrast, when the earth and sand were pumped as a plug flow using the pulsed air of the present invention, an increase in the pumping amount was confirmed.
【００１４】次に、パルスエアによる土砂の分割間隔と
圧送量、混合比及び圧損等の関係の把握と実機適用時の
機械システム構成の検討を目的として行われた実験につ
いて説明する。土砂圧入ポンプ（モンローポンプ１０m3
／hr×１０kgf ／cm2 ）、実験用圧送タンク（容量１．
２m3）及び塩ビ透明管及びＳＧＰ管からなる排送管（直
径１００mm、長さ２５５ｍ）で構成される実験用設備に
おいて土砂を連続的に循環させ、パルスエアの注入間隔
を変化させて土砂の分割間隔と圧送量、混合比及び圧損
等の関係についてデータを採取した。実験では、含水比
が７５％、８５％、９５％の３ケースの供試土を用い、
パルスエア間隔としては、常時閉鎖、常時開放、０．５
秒、１．０秒、３．０秒の各ケースについて測定した。
実験の結果、パルスエアを管内に注入することによって
排送管入口からプラグ流が形成され、このプラグ流が出
口まで維持されることが確認できた。この結果は、土砂
の含水比が増加するほど顕著になった。この実験に使用
した土砂の場合、空気開閉比（パルスエアの開時間と閉
時間の比）が０．３〜０．５のとき圧送量が増加するの
が確認できた。また、この空気開閉比のときに、混合比
（単位空気量で送ることができる泥水量）が高くなるこ
とが分かった。Next, a description will be given of an experiment conducted for the purpose of grasping the relationship between the division interval of the earth and sand by pulse air, the amount of pumping, the mixing ratio, the pressure loss, and the like, and examining the mechanical system configuration when the actual machine is applied. Sediment injection pump (Monroe pump 10m 3
/ Hr × 10 kgf / cm 2 ), experimental pumping tank (capacity 1.
2m 3 ) and continuous separation of soil in a laboratory facility consisting of a discharge pipe (diameter 100mm, length 255m) consisting of a transparent PVC pipe and SGP pipe, and dividing the sand by changing the pulse air injection interval Data was collected on the relationship between the interval, the pumping amount, the mixing ratio, the pressure loss, and the like. In the experiment, three cases of test soil with a water content of 75%, 85%, and 95% were used.
The pulse air interval is normally closed, always open, 0.5
Second, 1.0 and 3.0 seconds were measured for each case.
As a result of the experiment, it was confirmed that a plug flow was formed from the inlet of the discharge pipe by injecting pulsed air into the pipe, and this plug flow was maintained up to the outlet. This result became more remarkable as the water content of the soil increased. In the case of the earth and sand used in this experiment, it was confirmed that the pumping amount increased when the air opening / closing ratio (the ratio between the opening time and the closing time of the pulse air) was 0.3 to 0.5. Also, it was found that the mixing ratio (the amount of muddy water that can be sent per unit air amount) was high at this air opening / closing ratio.
【００１５】次に、実機レベルでの土砂の分割間隔と圧
送量、混合比及び圧損等の関係を確認することを目的と
して行われた現場実証試験について説明する。この実験
は、漁業保全事業としての作澪工を施工するもので、所
定の浚渫断面を空気圧送式浚渫船搭載のバックホウによ
り浚渫し、土砂を排送管（長さ１１２５ｍ）を通して土
運搬船（３００m3）に積み込むものである。圧送タンク
方式空気圧送船に電磁式空気弁（パルス弁）の開閉時間
を自動調節する装置、圧力センサ５台及び空気流量計を
取り付け、圧送タンクから排出される土砂にパルスエア
を注入し、土砂の分割間隔と圧送量、混合比及び圧損等
の関係についてデータを採取した。実験の結果、プラグ
流の形成が確認され、従来の方法と比較して圧送量が増
加することが分かった。また、パルスエアの注入によ
り、従来の方法と比較して管内での圧力損失の低下が確
認できたが、これはプラグ間の空気がクッションとなっ
て土砂が効率的に輸送されたものと考えられる。なお、
空気消費量は、パルスエアの閉時間の増加に比例して減
少することが分かった。Next, a description will be given of an on-site verification test conducted for the purpose of confirming the relationship between the separation interval of the earth and sand and the pumping amount, the mixing ratio, the pressure loss, and the like at the actual machine level. This experiment is for applying a work Mio Engineering as fisheries conservation projects, the predetermined dredging sectional dredged by backhoe pneumatic Okushiki dredger equipped, the discharging tube sediment (length 1125M) through soil carrier (300 meters 3 ). A pumping tank type air pumping vessel is equipped with a device that automatically adjusts the opening and closing time of the electromagnetic air valve (pulse valve), five pressure sensors and an air flow meter, and injects pulse air into the sand discharged from the pumping tank, Data was collected on the relationship between the division interval, the pumping amount, the mixing ratio, the pressure loss, and the like. As a result of the experiment, formation of a plug flow was confirmed, and it was found that the pumping amount was increased as compared with the conventional method. In addition, a decrease in pressure loss in the pipe was confirmed by the injection of pulsed air as compared with the conventional method, but it is considered that the air between the plugs became a cushion and soil and sand were transported more efficiently. . In addition,
It was found that the air consumption decreased in proportion to the increase of the pulse air closing time.
【００１６】[0016]
【発明の効果】本願発明の利点とするところは、次の通
りである。第１は、パルスエアにより、土砂を安定した
プラグ流として連続して圧送できるため、従来の泥土圧
送タンク毎のバッチ処理と比較して、効率的な輸送が可
能になった。第２は、異物の大部分は振動篩により事前
に除去されるが、本発明の方法及び装置では途中に開閉
するバルブがないため、閉塞物による作業効率の低下が
少なくなった。第３は、プラグ流間の空気が管内の土砂
の滞留を防止するため、低含水比から高含水比までの広
範囲の土砂の輸送が可能になった。第４は、泥土圧送タ
ンクに付属するバルブ類の水洗浄が不要になり、また、
輸送される土砂が水分が混入しないため、土砂は地山に
略近い含水比のままで輸送される。従って、高濃度の輸
送が可能となり、埋立地での余水処理が軽減され埋立地
の早期利用が可能になった。第５は、圧縮空気は断続的
に供給され、かつ、空気の吹抜け損失が少ないので、空
気消費量が少なくてすみ、従ってエネルギー消費量も低
減される。第６は、泥土圧送タンクが不要となるため装
置全体が小型化され、これにより解体組立式構造とする
ことが可能となり、適用範囲が広くなった。第７は、運
転中、装置から圧縮空気を開放する必要がないので、騒
音の発生や粉塵の飛散がなくなった。The advantages of the present invention are as follows. First, since pulsed air enables continuous feeding of soil and sand as a stable plug flow, efficient transport has become possible as compared with the conventional batch processing for each mud feeding tank. Second, most of the foreign matter is removed in advance by a vibrating sieve, but in the method and apparatus of the present invention, there is no valve that opens and closes in the middle, so that the decrease in work efficiency due to the obstruction is reduced. Third, since the air between the plug flows prevents sediment from accumulating in the pipe, a wide range of sediment can be transported from a low water content to a high water content. Fourth, water washing of valves attached to the mud pumping tank becomes unnecessary, and
Since the transported sediment does not contain moisture, the sediment is transported with a water content almost close to the ground. Therefore, high-concentration transportation became possible, and the sewage treatment at the landfill was reduced, and the landfill could be used early. Fifth, since the compressed air is intermittently supplied and the blow-through loss of the air is small, the air consumption is small, and the energy consumption is also reduced. Sixth, since the mud pumping tank is not required, the entire apparatus is reduced in size, whereby a disassembly and assembly type structure can be realized, and the applicable range has been widened. Seventh, since there is no need to release compressed air from the device during operation, noise generation and dust scattering are eliminated.
【００１７】以上列挙したような利点を有するため、本
発明は種々の土質や含水比に適用することができ、さら
に使用空気量を低減することによって効率的で且つ経済
的な土砂輸送を行うことができる。また、圧送の連続処
理と圧送タンクを使用しないため、騒音等が発生せず、
河川や湖沼でも使用可能な適用範囲の広い工法である。Due to the advantages listed above, the present invention can be applied to various soil types and water content ratios, and furthermore, it is possible to carry out efficient and economical sediment transport by reducing the amount of air used. Can be. In addition, since the continuous processing of the pressure feed and the use of the pressure feed tank are not used, there is no noise, etc.
This is a widely applicable method that can be used on rivers and lakes.
【図１】本発明のパルス式空気圧送装置の全体概略図で
ある。FIG. 1 is an overall schematic view of a pulse-type pneumatic feeding device of the present invention.
１０ パルス式空気圧送装置 １１ 土砂ホッパ １２ 圧入ポンプ １３ 管 １４ 圧力調整槽 １５ 管 １６ 管 １７ 圧縮空気源 １８ 管 １９ パルス弁 DESCRIPTION OF SYMBOLS 10 Pulse-type air-pressure feeding apparatus 11 Earth and sand hopper 12 Press-fit pump 13 Tube 14 Pressure adjustment tank 15 Tube 16 Tube 17 Compressed air source 18 Tube 19 Pulse valve
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−279117（ＪＰ，Ａ) 特開 平２−296932（ＪＰ，Ａ) 特開 昭60−192033（ＪＰ，Ａ) 特開 昭57−29798（ＪＰ，Ａ) 特開 平２−245298（ＪＰ，Ａ) 特公 昭55−21690（ＪＰ，Ｂ２) ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-279117 (JP, A) JP-A-2-296932 (JP, A) JP-A-60-192033 (JP, A) JP-A-57-1920 29798 (JP, A) JP-A-2-245298 (JP, A) JP-B-55-21690 (JP, B2)
Claims (3)
の圧力調整槽内の正圧によって、土砂を該圧力調整槽か
ら土砂排出管に供給し、該土砂排出管に圧縮空気を断続
的に供給することにより土砂を輸送する土砂のパルス式
空気圧送装置において、 前記圧力調整槽には、土砂を補充するための土砂補充用
管が連結され、該土砂補充用管には、前記圧力調整槽内
の正圧より高い圧力で土砂を圧送することができる圧入
ポンプが接続されていることを特徴とする土砂のパルス
式空気圧送装置。A positive pressure in a pressure regulating tank for temporarily storing sediment to be transported supplies soil from the pressure regulating tank to a sediment discharge pipe, and intermittently supplies compressed air to the sediment discharge pipe. In a pulse type pneumatic pumping apparatus for transporting earth and sand by supplying the earth and sand to the sand, a sand replenishing pipe for refilling the earth and sand is connected to the pressure adjusting tank, and the pressure adjusting tank is connected to the pressure adjusting tank. A pulse type pneumatic pumping apparatus for soil, wherein a press-fitting pump capable of pumping soil at a pressure higher than the positive pressure in the tank is connected.
ルが設けられ、該エアノズルは圧縮空気源に連結されて
おり、また、該エアノズルは、前記圧力調整槽内での土
砂の閉塞を防止するように、前記圧力調整槽内の土砂を
前記土砂排出管に向けて送る方向に差し向けられてい
る、ことを特徴とする請求項１に記載の土砂のパルス式
空気圧送装置。2. An air nozzle is provided inside the pressure adjusting tank, the air nozzle is connected to a compressed air source, and the air nozzle prevents earth and sand from being blocked in the pressure adjusting tank. 2. The pulsed pneumatic device for feeding sand according to claim 1, wherein the sand is directed in a direction in which the sand in the pressure adjustment tank is sent toward the sediment discharge pipe. 3.
するための圧縮空気源を有し、該圧縮空気源と前記土砂
排出管とは連結管を介して連結されており、該連結管に
は、輸送すべき土砂の土質に応じて決定された時間間隔
で、土砂排出管への圧縮空気の供給を断続的に行うため
の弁が設けられている、ことを特徴とする請求項１又は
２に記載の土砂のパルス式空気圧送装置。3. A compressed air source for supplying compressed air to the sediment discharge pipe, wherein the compressed air source and the sediment discharge pipe are connected via a connecting pipe. And a valve for intermittently supplying compressed air to the sediment discharge pipe at time intervals determined according to the soil quality of the sediment to be transported. Or the pulse-type pneumatic pumping device for earth and sand according to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4326735A JP2779888B2 (en) | 1992-12-07 | 1992-12-07 | Pulsed pneumatic method and equipment for earth and sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4326735A JP2779888B2 (en) | 1992-12-07 | 1992-12-07 | Pulsed pneumatic method and equipment for earth and sand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06171751A JPH06171751A (en) | 1994-06-21 |
| JP2779888B2 true JP2779888B2 (en) | 1998-07-23 |
Family
ID=18191098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4326735A Expired - Lifetime JP2779888B2 (en) | 1992-12-07 | 1992-12-07 | Pulsed pneumatic method and equipment for earth and sand |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2779888B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60192033A (en) * | 1984-01-17 | 1985-09-30 | Katsuyoshi Harada | Mud forced-feeding tank device |
| JPH02254298A (en) * | 1989-03-27 | 1990-10-15 | Mitsubishi Electric Corp | Method and apparatus for defending against ship attacking missile |
| JPH02296932A (en) * | 1989-05-12 | 1990-12-07 | Ube Ind Ltd | Apparatus for dredging and discharging sediment |
| JPH03279117A (en) * | 1990-03-27 | 1991-12-10 | Mitsubishi Heavy Ind Ltd | Force feed device for slurry |
-
1992
- 1992-12-07 JP JP4326735A patent/JP2779888B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06171751A (en) | 1994-06-21 |
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