JPH04260402A - Device for transferring precipitate - Google Patents
Device for transferring precipitateInfo
- Publication number
- JPH04260402A JPH04260402A JP2246791A JP2246791A JPH04260402A JP H04260402 A JPH04260402 A JP H04260402A JP 2246791 A JP2246791 A JP 2246791A JP 2246791 A JP2246791 A JP 2246791A JP H04260402 A JPH04260402 A JP H04260402A
- Authority
- JP
- Japan
- Prior art keywords
- pressure water
- water
- nozzle
- ram
- pressure
- 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.)
- Pending
Links
- 239000002244 precipitate Substances 0.000 title abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 124
- 239000004576 sand Substances 0.000 claims description 29
- 238000002347 injection Methods 0.000 claims description 28
- 239000007924 injection Substances 0.000 claims description 28
- 239000013049 sediment Substances 0.000 claims description 23
- 238000012546 transfer Methods 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、下水処理施設や浄水施
設などの水処理設備における沈砂池で使用されて沈砂池
の底部に堆積した沈砂などの沈澱物を沈砂ピットに移送
させる沈澱物移送装置に関するものである。[Industrial Application Field] The present invention is a sediment transfer system that is used in a settling basin in water treatment facilities such as sewage treatment facilities and water purification facilities to transfer sediment such as sand accumulated at the bottom of the settling basin to a settling pit. It is related to the device.
【０００２】0002
【従来の技術】一般に、下水処理施設や浄水施設におい
ては、流入下水や取水した原水から沈砂などの濁質分を
除去する設備として沈砂池が設けられている。この沈砂
池には底部に堆積した沈砂を沈砂ピットにかき寄せる沈
澱物移送装置として、沈砂ピットに続く下流側底部に円
筒形の圧力水噴射ノズルを設置し、この圧力水噴射ノズ
ルから噴射する圧力水のジェット水流によって沈砂をか
き寄せるようにしたものが従来から知られている。2. Description of the Related Art Generally, in sewage treatment facilities and water purification facilities, a settling basin is provided as a facility for removing turbid substances such as sediment from inflowing sewage or raw water taken in. In this sand settling basin, a cylindrical pressure water injection nozzle is installed at the bottom of the downstream side following the sand settling pit as a sediment transfer device that scrapes the sand accumulated at the bottom into the sand settling pit, and the pressure jetted from this pressure water injection nozzle is Conventionally, devices that use a jet stream of water to scrape up sediment have been known.
【０００３】0003
【発明が解決しようとする課題】しかし、上記従来のも
のは、圧力水噴射ノズルを沈砂池の底部に設置している
だけであり、圧力水噴射ノズルから圧力水を噴射させて
いないと、このノズルが沈砂池などの沈澱物に埋もれて
しまい、ノズル開孔部から沈澱物がノズル内に侵入し、
その結果、上記ノズル開孔部が沈澱物で塞がったり、塞
がれないまでも開孔面積が減り、圧力水の噴出量が減少
し、その後の作用時において沈澱物の移送が行えなくな
ることがあった。このため、沈澱物の多少にかかわらず
、１週間に１回程度の割合で定期的に上記ノズルに送水
するための圧力水ポンプを運転して上記ノズル開孔部の
詰まりを防止しなければならず、このための消費電力に
よる経済的負担が大きいものであった。[Problems to be Solved by the Invention] However, in the above conventional method, the pressure water injection nozzle is only installed at the bottom of the sand settling basin, and if pressure water is not injected from the pressure water injection nozzle, this If the nozzle is buried in sediment from a settling pond, the sediment may enter the nozzle through the nozzle opening.
As a result, the nozzle opening may be clogged with sediment, or even if it is not clogged, the opening area may be reduced, the amount of pressurized water ejected may be reduced, and sediment may not be transferred during subsequent operations. there were. Therefore, regardless of the amount of sediment, it is necessary to regularly operate a pressure water pump to supply water to the nozzle once a week to prevent clogging of the nozzle opening. First, the economic burden due to power consumption for this purpose was large.
【０００４】本発明は上記のような実情に鑑みてなされ
たもので、圧力水噴射ノズルのノズル開孔部の清掃を高
頻度に行わなくてもノズル開孔部の詰まりを防止できる
節電性に優れた沈澱物移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 circumstances, and provides an energy-saving feature that prevents clogging of the nozzle orifice of a pressure water injection nozzle without having to frequently clean the nozzle orifice. The purpose is to provide an excellent sediment transfer device.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に本発明は、圧力水噴射ノズルのノズル開孔部を、常時
はばね部材の復帰ばね力で移動付勢されるラムによって
閉成し、圧力水の噴射時にはそのラムを圧力水圧で開放
するように構成したものである。[Means for Solving the Problems] In order to achieve the above object, the present invention closes the nozzle opening of a pressure water injection nozzle by a ram that is normally moved and biased by the return spring force of a spring member. When pressurized water is injected, the ram is opened by pressure water pressure.
【０００６】また、上記ラムを閉成作動させるばね部材
にかえて、上記ノズルよりも高位置に設置された圧力水
タンクと上記圧力水噴射ノズルとの間に、上記タンク側
の水頭を上記ラムの後面に作用させる導水管を接続させ
る構成にしてもよい。In addition, instead of using a spring member that closes the ram, the water head on the tank side is connected to the ram between the pressure water tank installed at a higher position than the nozzle and the pressure water injection nozzle. A structure may be adopted in which a water conduit pipe acting on the rear surface of the pipe is connected.
【０００７】[0007]
【作用】上記構成により、圧力水噴射ノズルによる圧力
水の噴射時には、圧力水圧によってラムがばね部材のば
ね力に抗して後方に移動してノズル開孔部を開放するの
で、圧力水の噴射によるジェット水流で沈澱物を移送で
き、圧力水を噴射する必要のない常時には、ラムがばね
部材のばね力により前進してノズル開孔部を閉じるので
、沈澱物でノズル開孔部が塞がれたりするおそれがなく
なる。したがって、ノズル開孔部の清掃のためだけに定
期的に圧力水ポンプを運転する必要がなくなり、無駄な
電力消費が抑制されることになる。[Operation] With the above configuration, when the pressure water injection nozzle injects pressurized water, the ram moves backward against the spring force of the spring member due to the pressure water pressure and opens the nozzle opening, so that the pressure water is ejected. When there is no need to inject pressurized water, the ram moves forward by the spring force of the spring member and closes the nozzle opening, so that the nozzle opening is not clogged with sediment. There is no risk of it happening. Therefore, there is no need to periodically operate the pressure water pump just to clean the nozzle opening, and wasteful power consumption is suppressed.
【０００８】また、上記圧力水タンク側と圧力水噴射ノ
ズルとの間に接続した導水管により、上記圧力水タンク
側の水頭を利用してラムを閉作動させる場合には、ラム
の開閉作動力を調整しやすくなる。Furthermore, when the ram is operated to close by utilizing the water head on the pressure water tank side through a water conduit connected between the pressure water tank side and the pressure water injection nozzle, the opening/closing force of the ram is reduced. becomes easier to adjust.
【０００９】[0009]
【実施例】以下、本発明の一実施例を図面にもとづいて
説明する。図１において、沈砂池１は原水２が上流側か
ら下流側に流通する流路をなしており、沈砂池１の底部
には上流側に位置して沈砂ピット３が形成されていると
ともに、沈砂ピット３に続く下流側の底部近傍に、圧力
水４を上流側に向けて噴射する複数の圧力水噴射ノズル
５が配置されている。この圧力水噴射ノズル５は、たと
えば図２に示すように、薄板５ａにノズル開孔部５ｂ（
図３）を形成したものであり、ノズル開孔部５ｂが上下
方向のスリット状に形成されている。そして、圧力水噴
射ノズル５は、沈砂池１の流路幅方向に適当間隔をおい
て列をなすとともに、原水２の流れ方向に適当間隔をお
いて複数列に設けられている。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a settling basin 1 forms a flow path through which raw water 2 flows from the upstream side to the downstream side, and a settling pit 3 is formed at the bottom of the settling basin 1 on the upstream side, and A plurality of pressurized water injection nozzles 5 are arranged near the bottom on the downstream side following the pit 3 to inject pressurized water 4 toward the upstream side. For example, as shown in FIG. 2, this pressure water injection nozzle 5 has a nozzle opening 5b (
3), and the nozzle opening 5b is formed in the shape of a vertical slit. The pressure water injection nozzles 5 are arranged in rows at appropriate intervals in the width direction of the flow path of the sand settling basin 1, and are also provided in a plurality of rows at appropriate intervals in the flow direction of the raw water 2.
【００１０】また、各圧力水噴射ノズル５は共通の圧力
水主管６にノズル取付管７を介して接続されており、圧
力水主管６は電動式開閉弁８を介して圧力水供給管９に
連通している。さらに、圧力水供給管９の途中には圧力
水ポンプ１０が介装されている。１１は上記沈砂池１上
に設置された圧力水タンク、１２は沈砂ピット３に移送
された沈砂などの沈澱物１３を引き上げる揚砂装置であ
る。Each pressure water injection nozzle 5 is connected to a common pressure water main pipe 6 via a nozzle attachment pipe 7, and the pressure water main pipe 6 is connected to a pressure water supply pipe 9 via an electric on-off valve 8. It's communicating. Furthermore, a pressure water pump 10 is interposed in the middle of the pressure water supply pipe 9. 11 is a pressure water tank installed above the sand settling basin 1, and 12 is a sand lifting device for pulling up sediment 13 such as sand transferred to the sand settling pit 3.
【００１１】上記圧力水噴射ノズル５の後端には、図３
に示すようにシリンダ部５ｃが延設されており、このシ
リンダ部５ｃ内には、先端部１３ａで上記圧力水噴射ノ
ズル５のノズル開孔部５ｂを開閉するラム１３が前後移
動可能に嵌装されている。このラム１３の後面と上記シ
リンダ部５ｃの後壁との間には、圧力水４の圧力よりも
小さいばね力を有し、圧力水噴射ノズル５の作動停止時
に上記ラム１３を閉位置へ前進させる圧縮コイルばね１
４が介在されている。上記圧力水タンク１５と上記シリ
ンダ部５ｃとの間には、該タンク１５側の水頭を上記ラ
ム１３の後面に対して作用させるための導水管１５が接
続されており、この導水管１５の途中には、圧力水ポン
プ１０の運転時に閉作動し、運転停止時には開作動する
電動式開閉弁１６が介装されている。At the rear end of the pressure water injection nozzle 5, as shown in FIG.
As shown in the figure, a cylinder portion 5c extends, and a ram 13 that opens and closes the nozzle opening 5b of the pressure water injection nozzle 5 at its tip 13a is fitted in the cylinder portion 5c so as to be movable back and forth. has been done. A spring force smaller than the pressure of the pressure water 4 is provided between the rear surface of the ram 13 and the rear wall of the cylinder portion 5c, and the ram 13 is advanced to the closed position when the pressure water injection nozzle 5 stops operating. Compression coil spring 1
4 is interposed. A water conduit 15 is connected between the pressure water tank 15 and the cylinder portion 5c for causing the water head on the tank 15 side to act on the rear surface of the ram 13. An electric on-off valve 16 is interposed therein, which is closed when the pressure water pump 10 is in operation and opened when the pump is stopped.
【００１２】以下、上記構成における作用について説明
する。沈砂池１に流入した原水２は上流側から下流側に
向けて流通し、原水２とともに沈砂池１に流入した沈澱
物、たとえば沈砂１３は、比重に基づく沈降速度に応じ
て比重の大きいものから順次に沈砂ピット３および沈砂
ピット３の下流側に続く沈砂池１の底部に沈降して堆積
する。そして、一定期間ごともしくは沈砂池１の底部に
適当量の沈砂１３が堆積したときに、沈砂１３の移送を
行う。この手順を説明する。[0012] The operation of the above configuration will be explained below. The raw water 2 that has flowed into the settling basin 1 flows from the upstream side to the downstream side, and the sediments that have flowed into the settling basin 1 together with the raw water 2, such as settled sand 13, are sorted from those with the highest specific gravity to those with the highest specific gravity according to the sedimentation speed based on the specific gravity. The sediment is sequentially settled and deposited at the bottom of the sand settling pit 3 and the sand settling basin 1 that continues downstream of the sand settling pit 3. Then, the sand 13 is transferred at regular intervals or when an appropriate amount of sand 13 is deposited at the bottom of the sand settling basin 1. This procedure will be explained.
【００１３】沈砂１３の移送に先立って、圧力水主管６
に介装された電動式開閉弁８を開放し、圧力水ポンプ１
０によって供給される圧力水４を圧力水供給管９、圧力
水主管６、ノズル取付管７を通して圧力水噴射ノズル５
に供給する。この圧力水４の水圧（６〜１０ｋｇ／ｃｍ
２）がラム１３の前面側に付勢されて圧縮コイルばね
１４のばね力に抗して後退するので、ノズル開孔部５ｂ
が開放されて該ノズル開口部５ａから圧力水４が噴出さ
れ、沈砂池１の底部に堆積した沈砂１３を沈砂ピット３
に移送することができる。また、ノズル開孔部５ｂが開
放された後、電動式開閉弁１６を閉じる。Prior to transferring the sand 13, the pressure water main pipe 6
Open the electric on-off valve 8 installed in the pressure water pump 1.
0 is passed through the pressure water supply pipe 9, the pressure water main pipe 6, and the nozzle attachment pipe 7 to the pressure water injection nozzle 5.
supply to. The water pressure of this pressure water 4 (6 to 10 kg/cm
2) is urged toward the front side of the ram 13 and retreats against the spring force of the compression coil spring 14, so that the nozzle opening 5b
is opened and pressurized water 4 is ejected from the nozzle opening 5a to remove the sediment 13 accumulated at the bottom of the sand settling basin 1 into the sand settling pit 3.
can be transferred to. Further, after the nozzle opening 5b is opened, the electric on-off valve 16 is closed.
【００１４】そして、沈砂池１の底部の沈砂１３の堆積
量が適当量に達していない通常時には、圧力水ポンプ１
０の運転を止める一方、電動式開閉弁１６を開放させる
ので、圧送ポンプ１０側の水頭が導水管１５を通してラ
ム１３の後面に付勢作用される。このため、ラム１３は
前面側からの圧力よりも後面からの圧力が大きくなって
前進してノズル開口部５ａを閉じることになる。したが
って、沈砂１３でノズル開孔部５ｂ内に侵入するのが阻
止され、該ノズル開孔部５ｂが詰まったりするおそれが
なくなり、圧力水４の噴出による沈砂１３の移送を確実
に行わせることができる。[0014] During normal times when the amount of sediment 13 at the bottom of the settling basin 1 has not reached an appropriate amount, the pressure water pump 1 is turned off.
Since the electric on-off valve 16 is opened while the operation of the pump 0 is stopped, the water head on the pressure pump 10 side is biased against the rear surface of the ram 13 through the water conduit 15. Therefore, the pressure from the rear side of the ram 13 becomes greater than the pressure from the front side, and the ram 13 moves forward to close the nozzle opening 5a. Therefore, the settling sand 13 is prevented from entering the nozzle opening 5b, there is no risk that the nozzle opening 5b will be clogged, and the settling sand 13 can be reliably transferred by jetting out the pressure water 4. can.
【００１５】このように、沈砂池１の底部に沈砂１３が
多量に堆積した時だけ圧力水ポンプ１０を運転して圧力
水噴射ノズル５から圧力水４を噴射させればよく、ノズ
ル開孔部５ｂの洗浄だけのために度々上記圧力水ポンプ
１０を運転する必要はなくなる。上記圧力水ポンプ１０
の運転には３７〜１５０ＫＷもの大電力を要するが、運
転頻度が大幅に少なくなることにより、消費電力を著し
く低減させることができる。しかも、上記ラム１３を閉
成作動させるのに油圧等を使用していないので、原水２
を汚染させるおそれもない。上記ラム１３に対して圧縮
コイルばね１４の復帰ばね力だけで閉成作動させること
も可能であるが、上記のように導水管１５により圧力水
タンク１１の水頭を利用する構成によれば、原水２の水
圧に抗したラム１３の閉成作動力の調整が行い易い利点
がある。なお、上記圧力水タンク１１内の水位と沈砂池
１の原水２の水位の差が大きければ、圧縮コイルばね１
４を省いた構成も可能である。As described above, only when a large amount of sediment 13 is deposited at the bottom of the sand settling basin 1, it is sufficient to operate the pressure water pump 10 to inject the pressure water 4 from the pressure water injection nozzle 5. There is no need to frequently operate the pressure water pump 10 just for cleaning the water 5b. The above pressure water pump 10
Although a large amount of power of 37 to 150 kW is required for operation, power consumption can be significantly reduced by significantly reducing the frequency of operation. Moreover, since no hydraulic pressure is used to close the ram 13, the raw water 2
There is no risk of contaminating the It is also possible to close the ram 13 using only the return spring force of the compression coil spring 14, but according to the configuration in which the water head of the pressure water tank 11 is used by the water conduit 15 as described above, the raw water There is an advantage that the closing force of the ram 13 against the water pressure in step 2 can be easily adjusted. Note that if the difference between the water level in the pressure water tank 11 and the water level of the raw water 2 in the settling tank 1 is large, the compression coil spring 1
A configuration in which 4 is omitted is also possible.
【００１６】図４は上記ラム１３を閉成作動させるため
の配管の変形例を示し、圧力水噴射ノズル５に圧力水４
を送給するための圧力水主管６と導水管１５との間に連
絡弁１７を介装したものである。この場合、上記連絡弁
１７を開放すれば、圧力水ポンプ１０が運転中であって
も、ラム１３を閉成作動してノズル開孔部５ｂを閉じさ
せることができる。FIG. 4 shows a modification of the piping for closing the ram 13, in which pressure water 4 is connected to the pressure water injection nozzle 5.
A communication valve 17 is interposed between the main pressure water pipe 6 and the water conduit pipe 15 for supplying water. In this case, by opening the communication valve 17, the ram 13 can be closed to close the nozzle opening 5b even when the pressure water pump 10 is in operation.
【００１７】なお、上記ラム１３の後面に導水管１５を
介して圧力水タンク１１側の水頭を付勢する代わりに、
圧縮エアを送り込むようにしてもよい。Note that instead of applying force to the water head on the pressure water tank 11 side via the water conduit 15 to the rear surface of the ram 13,
Compressed air may also be fed.
【００１８】[0018]
【発明の効果】以上のように本発明によれば、圧力水噴
射ノズル内に嵌装したラムを常時はばね部材のばね力で
前進させてノズル開孔部を閉じ、圧力水噴射時にはこの
圧力水の圧力で後退させてノズル開孔部を開放させるよ
うにしたので、沈澱物の侵入によるノズル開孔部の詰ま
りが防止され、ノズル開孔部の清掃のためだけに圧力水
ポンプを頻繁に運転する必要がなくなり、節電効果を高
めることができる。As described above, according to the present invention, the ram fitted in the pressure water injection nozzle is normally advanced by the spring force of the spring member to close the nozzle opening, and when pressurized water is injected, this pressure Since the nozzle orifice is opened by retreating with water pressure, the nozzle orifice is prevented from clogging due to the intrusion of sediment, and the pressure water pump is not required to be used frequently just to clean the nozzle orifice. There is no need to drive, which can increase the power saving effect.
【００１９】また、圧力水噴射ノズルと圧力水タンク側
との間に接続した導水管によって圧力水タンク側の水頭
を利用してラムを閉成作動させるので、閉成作動力の調
整が容易に行なえる。Furthermore, since the ram is operated to close using the water head on the pressure water tank side through the water conduit connected between the pressure water injection nozzle and the pressure water tank side, the closing operation force can be easily adjusted. I can do it.
【図１】本発明の一実施例に係る沈砂物移送装置を示す
全体構成図である。FIG. 1 is an overall configuration diagram showing a sediment transfer device according to an embodiment of the present invention.
【図２】沈砂池における圧力水噴射ノズル設置部位の平
面図である。FIG. 2 is a plan view of a pressure water injection nozzle installation site in a sand settling basin.
【図３】圧力水噴射ノズルの構成を示す断面図である。FIG. 3 is a sectional view showing the configuration of a pressure water injection nozzle.
【図４】本発明の他の実施例を示す一部の構成図である
。FIG. 4 is a partial configuration diagram showing another embodiment of the present invention.
１ 沈砂池 ２ 原水 ３ 沈砂ピット ４ 圧力水 ５ 圧力水噴射ノズル ５ａ ノズル開孔部 １１ 圧力水タンク １３ ラム １４ ばね部材 １５ 導水管 1 Sand basin 2 Raw water 3 Sand settling pit 4 Pressure water 5 Pressure water injection nozzle 5a Nozzle opening 11 Pressure water tank 13 Ram 14 Spring member 15 Water pipe
Claims (2)
されるとともに、底部に沈砂ピットが形成された沈砂池
における底部近傍に、沈砂ピットに向けて圧力水を噴射
する複数の圧力水噴射ノズルが設けられている沈澱物移
送装置において、上記圧力水噴射ノズル内に前後方向に
移動可能なラムを嵌装し、このラムを、常時はばね部材
の復帰ばね力で圧力噴射ノズルのノズル開孔部を閉成す
べく前方に移動付勢し、圧力水の噴射時には上記復帰ば
ね力よりも大きい圧力水圧でノズル開孔部を開成すべく
後方に移動させるように構成していることを特徴とする
沈澱物移送装置。Claim 1: A plurality of pressurized water jets near the bottom of a settling pond in which raw water is passed from the upstream side to the downstream side and a sand settling pit is formed at the bottom, the pressure water being injected toward the sand settling pit. In a sediment transfer device equipped with an injection nozzle, a ram movable in the front-rear direction is fitted into the pressure water injection nozzle, and the ram is normally operated by the return spring force of a spring member. It is characterized in that it is configured to be biased to move forward to close the nozzle opening, and to be moved backward to open the nozzle opening with pressure water pressure greater than the return spring force when pressurized water is injected. Sediment transfer equipment.
かえて、上記ノズルよりも高位置に設置された圧力水タ
ンクと圧力水噴射ノズルとの間に、上記タンク側の水頭
を上記ラムの後面に作用させる導水管が接続されている
ことを特徴とする請求項１記載の沈澱物移送装置。2. Instead of a spring member that closes the ram, a pressure water injection nozzle is installed between a pressure water tank installed at a higher position than the nozzle and a pressure water injection nozzle, so that the water head on the tank side is connected to the ram. 2. The sediment transfer device according to claim 1, further comprising a water conduit connected to the rear surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2246791A JPH04260402A (en) | 1991-02-18 | 1991-02-18 | Device for transferring precipitate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2246791A JPH04260402A (en) | 1991-02-18 | 1991-02-18 | Device for transferring precipitate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04260402A true JPH04260402A (en) | 1992-09-16 |
Family
ID=12083515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2246791A Pending JPH04260402A (en) | 1991-02-18 | 1991-02-18 | Device for transferring precipitate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04260402A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009240890A (en) * | 2008-03-31 | 2009-10-22 | Kubota Corp | Grit tank |
-
1991
- 1991-02-18 JP JP2246791A patent/JPH04260402A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009240890A (en) * | 2008-03-31 | 2009-10-22 | Kubota Corp | Grit tank |
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