JPH11153286A - Method and device for removing foreign matter in conduit - Google Patents
Method and device for removing foreign matter in conduitInfo
- Publication number
- JPH11153286A JPH11153286A JP9320202A JP32020297A JPH11153286A JP H11153286 A JPH11153286 A JP H11153286A JP 9320202 A JP9320202 A JP 9320202A JP 32020297 A JP32020297 A JP 32020297A JP H11153286 A JPH11153286 A JP H11153286A
- Authority
- JP
- Japan
- Prior art keywords
- net
- foreign matter
- pipe
- water
- water pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/24—Preventing accumulation of dirt or other matter in the pipes, e.g. by traps, by strainers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本願発明は、例えば原子力発
電所や火力発電所等において、海水や池水あるいは河川
の水等を利用する場合の、導水管内の異物除去方法及び
その装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing foreign matter in a water pipe when seawater, pond water, river water, or the like is used in, for example, a nuclear power plant or a thermal power plant.
【０００２】[0002]
【従来の技術】例えば火力発電においては、図７に示す
ように給水管１１から供給される水をボイラ１０で加熱
し、そこで発生する高温高圧の水蒸気を蒸気管１２を通
して発電用の蒸気タービン１３に供給し、該水蒸気で蒸
気タービン１３を駆動する。そして、その後、復水器
（コンデンサ）１４で水蒸気を冷却して液化させ、その
復水を給水管１１を通して再びボイラ１０に戻し、順次
循環させるようになっている。尚、復水器１４内には多
数の細管１５を有し、該各細管１５内に冷却水を流通さ
せることで水蒸気の冷却効率を高めるようにしている。2. Description of the Related Art In thermal power generation, for example, as shown in FIG. 7, water supplied from a water supply pipe 11 is heated by a boiler 10, and high-temperature and high-pressure steam generated there is passed through a steam pipe 12 to generate a steam turbine 13 for power generation. And the steam drives the steam turbine 13. Thereafter, the steam is cooled and liquefied by a condenser (condenser) 14, and the condensed water is returned to the boiler 10 again through the water supply pipe 11, and is sequentially circulated. The condenser 14 has a large number of small tubes 15, and the cooling water is circulated through each of the small tubes 15 to increase the efficiency of cooling steam.
【０００３】他方、復水器１４には、蒸気タービン１３
を駆動させた水蒸気を復水させるために多量の冷却水を
必要としているが、該冷却水は量の確保の観点から海水
Ｗ0を利用するのが一般的である。そして、図７に示す
ように、該海水Ｗ0をポンプ１６で汲み上げ、導水管１
を通して復水器１４内の細管１５中を流通させるように
している。On the other hand, a steam turbine 13
While in need of a large amount of cooling water in order to condensate the water vapor was driven, the cooling water is to utilize seawater W 0 from the viewpoint of securing the amount is common. Then, as shown in FIG. 7, the seawater W 0 is pumped up by the pump 16 and
Through the narrow tube 15 in the condenser 14.
【０００４】又、海水Ｗ0中には、ビニール片、カキな
どの貝類、藻、その他種々の異物が浮遊しているが、汲
上管１７の取水口に除塵スクリーン１８を設けて、予め
大きい異物をそこで除去するようにしている。尚、除塵
スクリーン１８の目幅を小さくすると、小さい異物まで
除去できるが、目詰まりし易く且つ異物の掃除が面倒で
あることから、該スクリーン目幅をあまり小さくできな
いのが現状である。従って、導水管１内には、除塵スク
リーン１８を通過した小径（又は細長）の異物混じりの
冷却水Ｗ0が導入される。尚、貝類は、除塵スクリーン
１８を通過した後、導水管１の内面に付着してそこで成
長することがあり、その貝殻が導水管内面から剥がれる
と、復水器１４側に流されることがある。[0004] In the seawater W 0 , shells such as vinyl pieces and oysters, algae, and various other foreign substances are floating. A dust removing screen 18 is provided at the intake port of the pumping pipe 17, and large foreign substances are previously provided. Are removed there. If the mesh width of the dust removing screen 18 is reduced, even small foreign matter can be removed. However, at present, the screen mesh width cannot be reduced too much because the clogging is easy and the cleaning of the foreign matter is troublesome. Therefore, the cooling water W 0 mixed with the small-diameter (or elongated) foreign matter that has passed through the dust removing screen 18 is introduced into the water guide pipe 1. After passing through the dust removing screen 18, the shellfish may adhere to the inner surface of the water pipe 1 and grow there, and when the shell is peeled off from the inner surface of the water pipe, the shell may flow toward the condenser 14. .
【０００５】ところで、異物混じりの冷却水Ｗ0がその
まま復水器１４の細管１５に供給されると、該異物が細
管１５を塞いでトラブルの原因となる。これを防止する
ために、マッセルフィルタや逆洗弁、その他種々のフィ
ルタが開発・実用化されているが、設置スペース、価
格、逆洗流速不足、逆洗時に冷却水の流れを止める必要
がある、等の問題がある。If the cooling water W 0 mixed with foreign matter is supplied to the thin tube 15 of the condenser 14 as it is, the foreign matter blocks the thin tube 15 and causes a trouble. To prevent this, Mussel filters, backwash valves, and various other filters have been developed and put into practical use. However, installation space, price, insufficient backwash flow rate, and the need to stop the flow of cooling water during backwash are required. , Etc.
【０００６】又、従来から、図８に示すような導水管内
の異物除去装置が知られている（特公昭６０−５８３８
号公報）。この図８に示す異物除去装置は、図７の符号
Ｙで示すように導水管１の適所に設けられている。そし
て、この異物除去装置は、導水管１内における流水方向
Ｖに小間隔を隔てて２枚の半円形ネット２Ａ，２Ｂを設
置している。この各半円形ネットは、上流側半円形ネッ
ト２Ａが上側で下流側半円形ネット２Ｂが下側に位置
し、さらに各半円形ネット２Ａ，２Ｂはそれぞれ下流側
に向けて下降傾斜させている。尚、この各半円形ネット
２Ａ，２Ｂの目幅は、復水器１４の細管１５の口径より
小さくしている。又、導水管１内における半円形ネット
設置位置を挟んでその上流側と下流側にそれぞれ連通管
８１，８２を接続し、該各連通管８１，８２内の圧力差
を差圧計８で検出し得るようにしている。この差圧計８
は、一定圧力差を検出すると、警報装置を作動させるよ
うになっている。下流側半円形ネット２Ｂの上流側付け
根には、導水管１を貫通する異物排出管８６が下向きに
設置されている。この異物排出管８６は、バルブ８７で
開閉される。Conventionally, there is known an apparatus for removing foreign matter in a water pipe as shown in FIG. 8 (Japanese Patent Publication No. 60-5838).
No.). The foreign matter removing device shown in FIG. 8 is provided at an appropriate position of the water pipe 1 as shown by a reference character Y in FIG. In this foreign matter removing device, two semicircular nets 2A and 2B are installed at small intervals in the flowing water direction V in the water pipe 1. In each of the semicircular nets, the upstream semicircular net 2A is located on the upper side and the downstream semicircular net 2B is located on the lower side, and the semicircular nets 2A and 2B are each inclined downward toward the downstream side. The mesh width of each of the semicircular nets 2A and 2B is smaller than the diameter of the thin tube 15 of the condenser 14. In addition, communication pipes 81 and 82 are respectively connected to the upstream and downstream sides of the semicircular net installation position in the water pipe 1, and a pressure difference between the communication pipes 81 and 82 is detected by the differential pressure gauge 8. I'm trying to get. This differential pressure gauge 8
When a certain pressure difference is detected, an alarm device is activated. At the base of the upstream side of the downstream semicircular net 2B, a foreign matter discharge pipe 86 penetrating through the water guide pipe 1 is installed downward. The foreign matter discharge pipe 86 is opened and closed by a valve 87.
【０００７】そして、図８に示す従来の異物除去装置で
は、導水管１内を異物Ａ混じりの海水Ｗ0が流れると、
水Ｗだけが上流側半円形ネット２Ａ及び下流側半円形ネ
ット２Ｂの各網目を通過し、網目より大きい異物Ａは、
該両半円形ネット２Ａ，２Ｂの各前面で捕獲されるよう
になる。そして、両半円形ネット２Ａ，２Ｂの各前面に
異物Ａが付着すると、水の流通抵抗が大きくなって、前
後の連通管８１，８２内の圧力差が大きくなり、該圧力
差が設定圧力に達すると、それを差圧計８が検出して警
報装置を作動させ、両半円形ネット２Ａ，２Ｂの目詰ま
りを報知する。そして、両半円形ネット２Ａ，２Ｂの各
前面の付着異物Ａを排出するには、図７の弁８８を一旦
閉止して導水管１内の流れを止めた後、バルブ８７を開
けば、該付着異物Ａが海水とともに異物排出管８６を通
して排出される。In the conventional foreign matter removing device shown in FIG. 8, when seawater W 0 containing foreign matter A flows through the water pipe 1,
Only the water W passes through the meshes of the upstream semicircular net 2A and the downstream semicircular net 2B.
The two semicircular nets 2A and 2B are caught on each front face. When foreign matter A adheres to the front surfaces of the two semicircular nets 2A and 2B, the flow resistance of water increases, and the pressure difference between the front and rear communication pipes 81 and 82 increases. When it reaches, the differential pressure gauge 8 detects it and activates the alarm device to notify the clogging of the two semicircular nets 2A and 2B. Then, in order to discharge the adhered foreign substances A on the front surfaces of the two semicircular nets 2A and 2B, the valve 88 in FIG. 7 is closed once to stop the flow in the water pipe 1, and then the valve 87 is opened. The attached foreign matter A is discharged together with the seawater through the foreign matter discharge pipe 86.
【０００８】[0008]
【発明が解決しようとする課題】ところが、図８に示す
従来の異物除去装置では、ネット（上流側及び下流側の
各半円形ネット２Ａ，２Ｂ）の前面に付着した異物Ａを
除去するのに、警報が発せられた後、導水管１内の冷却
水Ｗ0の流れを停止させ、バルブ８７を開放させて異物
を排除し、バルブ８７を閉じ、冷却水の流通を再開させ
る、という作業を行う必要がある。従って、その異物除
去作業に時間がかかるとともに、各半円形ネット２Ａ，
２Ｂを通過する逆洗流速が小さいために十分な洗浄効果
が得られないという欠点がある。又、異物除去作業時に
は、導水管１内の冷却水の流れを一時的に止める必要が
あることから、その間は蒸気タービン１３の運転にも少
なからず影響を及ぼし、発電所の稼働率が低下するとい
う問題もあった。However, in the conventional foreign matter removing apparatus shown in FIG. 8, foreign matter A attached to the front surface of the net (each of the semicircular nets 2A and 2B on the upstream and downstream sides) is removed. after the alarm is issued, the flow of the cooling water W 0 in the conduit 1 is stopped, by opening the valve 87 to eliminate foreign substances, closing the valve 87, the work of, resuming the flow of the cooling water There is a need to do. Therefore, it takes time to remove the foreign matter, and each semicircular net 2A,
There is a disadvantage that a sufficient washing effect cannot be obtained because the backwash flow rate passing through 2B is small. In addition, since the flow of the cooling water in the water pipe 1 needs to be temporarily stopped at the time of the foreign matter removing operation, the operation of the steam turbine 13 is affected to some extent during that time, and the operating rate of the power plant is reduced. There was also a problem.
【０００９】本願発明は、上記した従来の異物除去装置
の問題点に鑑み、導水管内に異物捕獲用のネットを設け
た異物除去装置において、導水管内の冷却水の流れを止
めることなく、該ネット前面の異物を除去し得るように
した導水管内の異物除去方法及び異物除去装置を提供す
ることを目的としている。In view of the above-mentioned problems of the conventional foreign matter removing apparatus, the present invention provides a foreign matter removing apparatus in which a net for capturing foreign matter is provided in a water pipe without stopping the flow of cooling water in the water pipe. It is an object of the present invention to provide a method and an apparatus for removing foreign matter in a water pipe in which foreign matter on a front surface can be removed.
【００１０】[0010]
【課題を解決するための手段】本願発明は、上記課題を
解決するための手段として次の構成を有している。The present invention has the following structure as means for solving the above-mentioned problems.
【００１１】本願請求項１の発明 本願請求項１の発明は、例えば火力発電所の復水器を冷
却するのに使用される冷却水供給用の導水管内におい
て、ビニール片、藻、貝類等の異物を除去する方法を対
象にしている。そして、この請求項１の異物除去方法
は、導水管内の流水中に浮遊する異物を、上流側から見
て凹球面状のネットで捕獲するようにしている。又、ネ
ット前面（凹球面）で捕獲した異物は、導水管内の流水
を停止することなく洗浄管で外部に導入排除するように
している。さらに該洗浄管の先端開口は、ネットの凹球
面に対して微小間隔を隔てた近接状態で且つネット凹球
面の曲率半径を中心にして、該ネット全面に亘ってジグ
ザグ状に走査させるようにしている。尚、上記微小間隔
は、捕獲される異物の種類、大きさ等から、経験上１０
〜５０mm程度に設定すれば好結果が得られる。 The invention according to the first aspect of the present invention is directed to a method of cooling a condenser of a thermal power plant, for example, in a water supply pipe for supplying a cooling water, such as a piece of vinyl, algae, and shellfish. The method is intended for removing foreign matter. In the foreign matter removing method according to the first aspect, the foreign matter floating in the flowing water in the water pipe is captured by the concave spherical net when viewed from the upstream side. In addition, foreign matters caught on the front surface (concave spherical surface) of the net are introduced and removed by a washing pipe without stopping the running water in the water pipe. Further, the tip opening of the washing tube is in a close state at a small distance to the concave spherical surface of the net, and scans the entire surface of the net in a zigzag manner around the radius of curvature of the concave spherical surface of the net. I have. It should be noted that the above-mentioned minute interval is empirically determined by the type and size of the foreign matter to be captured.
Good results can be obtained by setting the thickness to about 50 mm.
【００１２】この請求項１の発明において、洗浄管によ
る異物の導入方法は、ネットの上流側（凹球面）近傍の
圧力（高圧力）と洗浄管内の圧力（低圧力）との差を利
用して、該異物を洗浄管内に導入するようにしてもよ
く、あるいは洗浄管内をポンプで強制吸引させるように
してもよい。According to the first aspect of the present invention, the method for introducing foreign matter by using the cleaning pipe utilizes a difference between a pressure (high pressure) near the upstream side (concave spherical surface) of the net and a pressure (low pressure) in the cleaning pipe. Then, the foreign matter may be introduced into the washing tube, or the inside of the washing tube may be forcibly sucked by a pump.
【００１３】本願請求項２の発明 本願請求項２の発明は、上記請求項１の異物除去方法を
行うための導水管内の異物除去装置を対象にしている。
そして、この請求項２の異物除去装置は、水を流通させ
る導水管内に、上流側から見て凹球面状のネットを設置
している。この請求項２の発明では、ネットとして、導
水管内の口径方向断面積の全面積を遮蔽する１枚もので
も、該口径方向断面積の一部を削除した面積の円割形ネ
ットでもよい。尚、上記円割形ネットを使用する場合
は、導水管内の口径方向断面積に対して１／４〜３／４
程度の範囲の面積のものが採用可能である。又、上記円
割形ネットを使用する場合は、１枚のみを導水管内の下
半部に設置したものでも、２枚を導水管内の上半部と下
半部に小間隔を隔てて設置したものでもよい。[0013] The invention of claim 2 of the present application is directed to an apparatus for removing foreign matter in a water pipe for performing the method of removing foreign matter of claim 1.
In the foreign matter removing device according to the second aspect, a net having a concave spherical shape as viewed from the upstream side is installed in the water pipe through which water flows. According to the second aspect of the present invention, the net may be a single piece which shields the entire area of the cross-sectional area in the radial direction in the water pipe, or a split net having an area in which a part of the cross-sectional area in the radial direction is deleted. When the above-mentioned split net is used, it is 1/4 to 3/4 of the cross-sectional area in the radial direction in the water pipe.
Those having an area in the range of about can be adopted. In addition, when using the split net, even if only one was installed in the lower half of the water pipe, two were installed in the upper half and lower half of the water pipe at a small interval. It may be something.
【００１４】前記ネットの上流側近傍位置には、水とと
もに異物を導入排除し得る洗浄管を設置している。この
洗浄管は、ネットの凹球面の曲率半径の中心位置におい
て球形軸受で軸支して、該洗浄管の先端開口が球形軸受
を中心にして上下及び左右に移動自在となるようにして
いる。又、洗浄管の先端開口は、ネット凹球面に対して
微小間隔を隔てて近接させている。この洗浄管による異
物の導入方法は、請求項１の場合と同様に、ネットの上
流側面近傍の圧力（高圧力）と洗浄管内の圧力（低圧
力）との差を利用してもよく、あるいは洗浄管内をポン
プで強制吸引させるようにしてもよい。尚、洗浄管には
排水管が接続されており、該洗浄管内に導入された異物
混じりの水は、排水管を通して外部に排出される。At a position near the upstream side of the net, a washing pipe capable of introducing and removing foreign matter together with water is provided. The washing tube is supported by a spherical bearing at the center of the radius of curvature of the concave spherical surface of the net, so that the opening at the tip of the washing tube is movable vertically and horizontally around the spherical bearing. The opening of the tip of the cleaning tube is close to the concave spherical surface of the net at a small interval. This foreign matter introduction method using the washing pipe may use the difference between the pressure near the upstream side surface of the net (high pressure) and the pressure inside the washing pipe (low pressure), as in the case of the first aspect. The inside of the washing tube may be forcibly sucked by a pump. A drain pipe is connected to the washing pipe, and water mixed with foreign substances introduced into the washing pipe is discharged outside through the drain pipe.
【００１５】又、この異物除去装置には、洗浄管を上下
方向に揺動させる上下駆動装置と、洗浄管を左右方向に
揺動させる左右駆動装置とを備えている。この上下駆動
装置及び左右駆動装置は、洗浄管をそれぞれ上下方向あ
るいは左右方向に揺動させ得るものであれば、適宜の形
式のものを採用できる。Further, the foreign matter removing device includes a vertical drive device for swinging the washing tube in the vertical direction, and a left and right drive device for swinging the washing tube in the left and right direction. The vertical drive device and the left and right drive device may be of any appropriate type as long as they can swing the washing tube in the vertical direction or the horizontal direction, respectively.
【００１６】この請求項２の異物除去装置では、上下駆
動装置及び左右駆動装置によって洗浄管を上下及び左右
に揺動させることにより、洗浄管の先端開口をネットの
凹球面の全面に亘って走査させることができる。又、こ
の異物除去装置において、ネットとして導水管の口径方
向断面積の全面積を遮蔽し得る１枚ものを使用すると、
異物の捕獲能力が良好である。又、該ネットとして上記
円割形ネットを使用すると、導水管内の通路面積中に無
ネット部分が生じて、異物捕獲能力がやや劣るが、もし
何らかの理由でネット前面に付着した異物を洗浄管で除
去できないトラブルが発生しても、導水管内のネット上
流側の圧力が許容範囲を超えて昇圧することがない。According to the second aspect of the present invention, the cleaning tube is swung up and down and left and right by the vertical driving device and the left and right driving device, so that the tip opening of the cleaning tube is scanned over the entire concave spherical surface of the net. Can be done. Further, in this foreign matter removing device, when one piece of net that can shield the entire area of the cross-sectional area in the diameter direction of the water pipe is used,
Good ability to capture foreign matter. Also, if the split net is used as the net, a netless portion is generated in the passage area in the water pipe, and the foreign matter capturing ability is slightly inferior. Even if a trouble that cannot be eliminated occurs, the pressure on the upstream side of the net in the water pipe does not rise beyond the allowable range.
【００１７】本願請求項３の発明 本願請求項３の発明は、上記請求項２の異物除去装置に
おいて、ネットは導水管内の口径方向断面積の一部を割
徐した面積の円割形ネットとしている。又、導水管内に
おける円割形ネット設置位置より上流側に所定小間隔を
隔てた位置で且つ円割形ネット設置位置とは反対側の導
水管内面に邪魔板を設置している。この場合、円割形ネ
ット（１枚）は、導水管内の下半部に設置することが好
ましく、従って邪魔板は導水管内の上部側に設置すると
よい。According to a third aspect of the present invention, in the foreign matter removing apparatus according to the second aspect, the net is a split net having an area obtained by cutting a part of the cross-sectional area in the diameter direction in the water pipe. I have. In addition, a baffle plate is installed on the inner surface of the water pipe at a position at a predetermined small interval upstream of the split net installation position in the water guide pipe and opposite to the split net installation position. In this case, the split net (one piece) is preferably installed in the lower half of the water pipe, so that the baffle plate is preferably installed on the upper side in the water pipe.
【００１８】この請求項３の異物除去装置では、導水管
内の円割形ネットに対応する側（下半部側）を流れる異
物混じりの水は、そのまま直進して該円割形ネットに衝
突しそのとき異物がネットの網目で捕獲される。他方、
導水管内の反円割形ネット側（上半部側）を流れる異物
混じりの水は、まず邪魔板に衝突して流れが円割形ネッ
ト側に変向せしめられた後、該円割形ネットの網目を通
過するようになる。従って、円割形ネットを１枚だけ使
用したもの（導水管内に無ネット部分がある）であって
も、該円割形ネットで効率よく異物を捕獲できる。In the foreign matter removing device according to the third aspect, the water mixed with the foreign matter flowing on the side (lower half side) corresponding to the split-shaped net in the water pipe is straight forward and collides with the split-shaped net. At that time, the foreign matter is captured by the net mesh. On the other hand,
The water mixed with foreign matter flowing on the anti-split net side (upper half side) in the water pipe first collides with a baffle plate, and the flow is diverted to the split net side. Through the mesh. Therefore, even if only one split-shaped net is used (there is no net portion in the water pipe), foreign matters can be efficiently captured by the split-shaped net.
【００１９】[0019]
【発明の実施の形態】以下、図１〜図６を参照して本願
の実施形態を説明すると、図１〜図３には本願第１実施
形態、図４〜図６にはそれぞれ本願第２〜第４実施形態
が示されている。これらの実施形態の異物除去装置は、
例えば図７に示すような火力発電用の復水器１４に冷却
水を供給するための導水管１に設置されるものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. FIGS. 1 to 3 show a first embodiment of the present invention, and FIGS. To 4th Embodiment are shown. The foreign matter removing devices of these embodiments include:
For example, it is installed in the water pipe 1 for supplying cooling water to the condenser 14 for thermal power generation as shown in FIG.
【００２０】尚、従来技術の項で説明したものと重複す
るが、例えば火力発電においては、図７に示すようにボ
イラ１０で加熱した高温高圧の水蒸気を発電用の蒸気タ
ービン１３に供給し、該水蒸気で蒸気タービン１３を駆
動した後、復水器（コンデンサ）１４で水蒸気を冷却し
て液化させ、その復水をボイラ１０に戻し、順次循環さ
せる。尚、復水器１４内には多数の細管１５を有してい
る。As described in the section of the prior art, for example, in thermal power generation, as shown in FIG. 7, high-temperature and high-pressure steam heated by a boiler 10 is supplied to a steam turbine 13 for power generation. After the steam turbine 13 is driven by the steam, the steam is cooled and liquefied by a condenser (condenser) 14, and the condensate is returned to the boiler 10 and sequentially circulated. The condenser 14 has a number of small tubes 15.
【００２１】他方、復水器１４内を冷却するためには、
大量の冷却水を確保する必要であり、該冷却水として一
般に海水が利用されている。尚、冷却水として、池水や
河川水を利用する場合もあるが、以下の説明では海水を
利用した場合で説明する。On the other hand, in order to cool the inside of the condenser 14,
It is necessary to secure a large amount of cooling water, and seawater is generally used as the cooling water. In addition, pond water or river water may be used as cooling water, but in the following description, a case where seawater is used will be described.
【００２２】火力発電所においては、図７に示すように
海水Ｗ0をポンプ１６で汲み上げ、導水管１を通して復
水器１４内の細管１５中を流通させることで復水器１４
内を冷却する。尚、導水管１の太さは、用途・規模によ
って異なるが、図示例では１８００mm程度の内径のもの
を想定している。In the thermal power plant, as shown in FIG. 7, seawater W 0 is pumped up by a pump 16 and circulated through a small pipe 15 in a condenser 14 through a water pipe 1 so that a condenser 14 is formed.
Cool inside. The thickness of the water pipe 1 varies depending on the application and scale, but in the illustrated example, an inner diameter of about 1800 mm is assumed.
【００２３】ところで、海水Ｗ0中には、ビニール片、
カキなどの貝類、藻、その他種々の異物が浮遊してお
り、取水口に除塵スクリーン１８を設けているものの、
小径（又は細長）の異物まで阻止し得るものではない。
従って、導水管１内には、除塵スクリーン１８を通過し
た小径（又は細長）の異物混じりの冷却水Ｗ0が導入さ
れる。[0023] By the way, it is in seawater W 0, plastic pieces,
Shellfish such as oysters, algae, and various other foreign substances are floating, and although a dust removal screen 18 is provided at the water intake,
It is not able to prevent small diameter (or slender) foreign matter.
Therefore, the cooling water W 0 mixed with the small-diameter (or elongated) foreign matter that has passed through the dust removing screen 18 is introduced into the water guide pipe 1.
【００２４】そして、本願実施形態の異物除去装置は、
異物混じりの冷却水Ｗ0中から、異物Ａを除去するため
のものである。The foreign matter removing device according to the present embodiment is
From the cooling water W in 0 foreign matter mingled, it is for removing foreign matters A.
【００２５】図１〜図３に示す第１実施形態の異物除去
装置は、図７において符号Ｙで示すように、導水管１に
おける復水器１４の直前位置に設置される。そして、こ
の第１実施形態の異物除去装置は、導水管１の横向き管
部内における流水方向Ｖに小間隔Ｌを隔てた位置に前後
２枚の円割形ネット２Ａ，２Ｂを設置し、該各円割形ネ
ット２Ａ，２Ｂの上流側近傍位置にそれぞれ洗浄管３，
３を配置するとともに、該各洗浄管３，３を上下に揺動
させる上下駆動装置６，６と、該各洗浄管３，３を左右
に揺動させる左右駆動装置７，７とを有している。尚、
第１実施形態の異物除去装置では、円割形ネット（２Ａ
又は２Ｂ）と洗浄管３と上下駆動装置６と左右駆動装置
７とを１セットにした同構造のものを、導水管１の上下
２箇所において相互に上下逆向きに取付けて構成されて
いる。又、導水管１、各円割形ネット２Ａ，２Ｂ、洗浄
管３等は、海水Ｗ0に接触するので、耐腐食性のある材
料で形成されていることは勿論である。The foreign matter removing apparatus according to the first embodiment shown in FIGS. 1 to 3 is installed at a position immediately before the condenser 14 in the water pipe 1 as shown by a symbol Y in FIG. The foreign matter removing device according to the first embodiment is provided with two front and rear split-shaped nets 2A and 2B at positions separated by a small distance L in the flowing water direction V in the horizontal pipe portion of the water guide pipe 1, and Washing pipes 3 are located near the upstream side of the split nets 2A and 2B, respectively.
3 and vertical drive units 6 and 6 for swinging the washing tubes 3 and 3 up and down, and right and left driving units 7 and 7 for swinging the washing tubes 3 and 3 left and right. ing. still,
In the foreign matter removing device according to the first embodiment, the split net (2A
Or 2B), the washing pipe 3, the vertical drive device 6, and the left and right drive device 7 in one set and having the same structure, which are attached to upper and lower two places of the water guide pipe 1, in a mutually upside-down direction. Also, conduit 1, each circle split type net 2A, 2B, the washing pipe 3 or the like, since contact with the seawater W 0, it is a matter of course formed of a material with corrosion resistance.
【００２６】各円割形ネット２Ａ，２Ｂは、導水管１内
の口径方向断面積の一部を割徐したものである。この各
円割形ネット２Ａ，２Ｂの面積は、例えば導水管１内の
口径方向断面積の１／４〜３／４程度の範囲のものが採
用可能であるが、この第１実施形態では、該各円割形ネ
ット２Ａ，２Ｂとして、それぞれ導水管１の口径方向断
面積の１／２強の面積の半円形ネットを採用している。Each of the split nets 2A and 2B is obtained by cutting a part of the cross-sectional area in the diameter direction in the water pipe 1. The area of each of the split nets 2A and 2B may be, for example, in the range of about 1/4 to 3/4 of the cross-sectional area in the radial direction in the water pipe 1, but in the first embodiment, As the split nets 2A and 2B, semicircular nets each having an area slightly more than half of the cross-sectional area in the radial direction of the water pipe 1 are adopted.
【００２７】この各円割形ネット２Ａ，２Ｂの目幅は、
復水器１４内の細管１５の内径より小さくされている。
又、上流側円割形ネット２Ａは、導水管１内の下方が開
放する状態で管内面に取付けられており、他方、下流側
円割形ネット２Ｂは、導水管１内の上方が開放する状態
で管内面に取付けられている。尚、各円割形ネット２
Ａ，２Ｂの開放側端部２２は、導水管１の中心高さＨを
若干高さＴづつ超えるような大きさとされている。The width of each split net 2A, 2B is
It is made smaller than the inner diameter of the thin tube 15 in the condenser 14.
The upstream split net 2A is attached to the pipe inner surface in a state where the lower part inside the water pipe 1 is open, while the downstream split net 2B is open at the upper part in the water pipe 1. It is attached to the inner surface of the pipe in a state. In addition, each split net 2
The open side ends 22 of A and 2B are sized to slightly exceed the center height H of the water pipe 1 by a height T.
【００２８】各円割形ネット２Ａ，２Ｂは、上流側から
見て凹球面状となる形状に成形されている。尚、この実
施形態では、各円割形ネット２Ａ，２Ｂの凹球面２１の
曲率半径Ｒは、導水管１の口径とほぼ同じ約１８００mm
程度かそれより少し大きい寸法とすることが構造上好ま
しい。Each of the split nets 2A and 2B is formed in a concave spherical shape when viewed from the upstream side. In this embodiment, the radius of curvature R of the concave spherical surface 21 of each of the split nets 2A and 2B is approximately 1800 mm, which is almost the same as the diameter of the water pipe 1.
It is structurally preferred to have dimensions of the order of or slightly larger.
【００２９】又、各円割形ネット２Ａ，２Ｂは、図１に
示すようにその各凹球面２１の曲率中心Ｐがそれぞれ導
水管１の外面近傍に位置するようにして取付けられてい
る。従って、上流側円割形ネット２Ａは、下端側が垂直
面より上流側に向けて若干下降傾斜し、他方、下流側円
割形ネット２Ｂは、上端側が垂直面より上流側に向けて
若干上昇傾斜している。尚、この各円割形ネット２Ａ，
２Ｂは、図示しない適宜の補強部材で強固に取付けてい
る。The split nets 2A and 2B are mounted such that the center of curvature P of each concave spherical surface 21 is located near the outer surface of the water pipe 1 as shown in FIG. Therefore, the upstream split net 2A has a lower end slightly inclined downward toward the upstream side from the vertical surface, while the downstream split net 2B has an upper end slightly inclined upward toward the upstream from the vertical surface. doing. In addition, each of the split nets 2A,
2B is firmly attached by a suitable reinforcing member (not shown).
【００３０】導水管１には、各円割形ネット２Ａ，２Ｂ
の前面（上流側）が見える位置に覗き窓（図示省略）を
設けておくと、該各円割形ネット２Ａ，２Ｂによる異物
捕獲状態を外部から目視できる。The water pipe 1 includes split nets 2A, 2B.
If a viewing window (not shown) is provided at a position where the front surface (upstream side) of the device can be seen, the foreign matter capturing state by each of the split nets 2A and 2B can be visually observed from the outside.
【００３１】各洗浄管３，３は、例えば口径が１５０mm
程度の耐腐食性管をＬ型に屈曲させたものを使用してい
る。この各洗浄管３，３は、上記各円割形ネット２Ａ，
２Ｂの凹球面２１の曲率中心Ｐと同位置において、それ
ぞれ球形軸受４，４で軸支している。又、各洗浄管３，
３の先端開口３０は、各円割形ネット２Ａ，２Ｂの凹球
面２１に微小間隔（例えば１０〜５０mm程度）を隔てて
近接させている。従って、この各洗浄管３，３は、該球
形軸受４部分で上下・左右に揺動自在となっており、そ
の揺動時に先端開口３０がネット凹球面２１に対して微
小等間隔をもって移動するようになっている。又、洗浄
管３の先端開口３０の外周部には、フランジ状の突起３
０ａを設けている。この突起３０ａは、洗浄管先端部付
近を流れる冷却水Ｗ0に渦を発生させる作用をする。Each of the washing tubes 3 has a diameter of, for example, 150 mm.
A tube having a degree of corrosion resistance bent into an L-shape is used. Each of the washing pipes 3 and 3 is connected to each of the split nets 2A,
At the same position as the center of curvature P of the concave spherical surface 21 of 2B, it is supported by spherical bearings 4 and 4, respectively. In addition, each washing tube 3,
The third end opening 30 is close to the concave spherical surface 21 of each of the split nets 2A and 2B with a small interval (for example, about 10 to 50 mm). Therefore, each of the washing pipes 3 and 3 is swingable up and down and left and right at the spherical bearing 4 portion, and at the time of swinging, the distal end opening 30 moves at a small equal interval with respect to the net concave spherical surface 21. It has become. A flange-like projection 3 is provided on the outer peripheral portion of the tip opening 30 of the washing tube 3.
0a is provided. The projection 30a is an action that generates eddy in the cooling water W 0 flowing near the cleaning tube tip.
【００３２】各洗浄管３，３は、それぞれ上下駆動装置
６と左右駆動装置７とによって上下及び左右に揺動せし
められる。各上下駆動装置６及び各左右駆動装置７は、
図示例では、それぞれモータ６１（又は７１）によって
伸縮せしめられるシリンダ６２（又は７２）で構成され
ている。The washing tubes 3 and 3 are swung up and down and left and right by a vertical drive unit 6 and a left and right drive unit 7, respectively. Each vertical driving device 6 and each horizontal driving device 7
In the illustrated example, each of them is constituted by a cylinder 62 (or 72) that can be expanded and contracted by a motor 61 (or 71).
【００３３】この上下駆動装置６及び左右駆動装置７
は、次のようにして洗浄管３に連結されている。即ち、
各洗浄管３，３における導水管外に露出している部分に
は、それぞれ保持台５と連結具７３が取付けられてい
る。保持台５は、図３に示すように、導水管直径方向に
対置された各側壁５３，５３の下部寄り位置を導水管１
に固定されたブラケット５１にそれぞれピン５２，５２
で軸支している。この各ピン５２，５２は、球形軸受４
の中心Ｐと同心状に位置しており、該保持台５及び洗浄
管３が導水管１の長手方向鉛直面で揺動し得るようにな
っている。洗浄管３の上端部は、保持台５に対して回転
継手３１を介して水平面内で回動自在となっている。
又、連結具７３は、洗浄管３における導水管１より外側
の露出部に固定されている。そして、上下駆動装置６
は、図１及び図２に示すように、導水管１の長さ方向に
向けた状態で該導水管１の外面に支持され、且つそのシ
リンダ６２のロッド先端を保持台５の上部寄り位置に連
結している。他方、左右駆動装置７は、導水管１の直径
方向に向けた状態で保持台５に支持され、且つそのシリ
ンダ７２のロッド先端を連結具７３に連結している。The vertical driving device 6 and the horizontal driving device 7
Is connected to the washing tube 3 as follows. That is,
The holding table 5 and the connecting member 73 are attached to portions of each of the washing pipes 3 and 3 that are exposed outside the water pipe. As shown in FIG. 3, the holding table 5 moves the lower part of each of the side walls 53, 53 opposed to each other in the diameter direction of the water pipe, to the water pipe 1.
Pins 52, 52 are respectively attached to brackets 51 fixed to
It is supported by. Each of the pins 52, 52 is a spherical bearing 4
, And the holding table 5 and the washing pipe 3 can swing on the vertical plane of the water guide pipe 1 in the longitudinal direction. The upper end of the cleaning pipe 3 is rotatable in a horizontal plane with respect to the holding table 5 via a rotary joint 31.
Further, the connecting member 73 is fixed to an exposed portion of the cleaning pipe 3 outside the water pipe 1. And the vertical drive device 6
As shown in FIGS. 1 and 2, the rod is supported on the outer surface of the water guide pipe 1 in a state of being directed in the longitudinal direction of the water guide pipe 1, and the rod tip of the cylinder 62 is located at a position closer to the upper part of the holding base 5. Connected. On the other hand, the left and right driving device 7 is supported by the holding table 5 in a state of being directed in the diameter direction of the water pipe 1, and has the rod end of the cylinder 72 connected to the connecting member 73.
【００３４】従って、上下駆動装置６のシリンダ６２を
縮小させる（モータ６１を正逆何れかに作動させる）
と、球形軸受４及び各ピン５２，５２を軸心にして洗浄
管３が図１の符号３Ａで示すように下動して、洗浄管先
端開口３０を上流側円割形ネット２Ａの下端２２付近ま
で移動させる。逆に、該上下駆動装置６のシリンダ６２
を伸長させると、洗浄管３が符号３Ｂで示すように上動
して、洗浄管先端開口３０を上流側円割形ネット２Ａの
上端付近まで移動させ得るようになっている。又、左右
駆動装置７のシリンダ７２を縮小させる（モータ７１を
正逆何れかに作動させる）と、球形軸受４及び回転継手
３１を軸心にして洗浄管３が図２の符号３Ｃで示すよう
に上流側から見て右動して、洗浄管先端開口３０を上流
側円割形ネット２Ａの右端付近まで移動させる。逆に、
該左右駆動装置７のシリンダ７２を伸長させると、洗浄
管３が符号３Ｄで示すように左動して、洗浄管先端開口
３０が上流側円割形ネット２Ａの左端付近まで移動させ
得るようになっている。Accordingly, the cylinder 62 of the vertical drive unit 6 is reduced (the motor 61 is operated in either forward or reverse direction).
The washing pipe 3 is moved downward as indicated by reference numeral 3A in FIG. 1 with the spherical bearing 4 and the pins 52, 52 as axes, and the washing pipe tip opening 30 is moved to the lower end 22 of the upstream split net 2A. Move to a nearby location. Conversely, the cylinder 62 of the vertical drive device 6
Is extended, the washing pipe 3 moves upward as indicated by reference numeral 3B, and the washing pipe tip opening 30 can be moved to near the upper end of the upstream side split net 2A. When the cylinder 72 of the left and right driving device 7 is reduced (the motor 71 is operated in either forward or reverse direction), the washing pipe 3 is rotated around the spherical bearing 4 and the rotary joint 31 as shown by reference numeral 3C in FIG. Then, the washing pipe tip opening 30 is moved rightward as viewed from the upstream side to move it near the right end of the upstream side split net 2A. vice versa,
When the cylinder 72 of the left and right driving device 7 is extended, the washing pipe 3 moves to the left as shown by reference numeral 3D, so that the washing pipe tip opening 30 can be moved to the vicinity of the left end of the upstream split net 2A. Has become.
【００３５】上下駆動装置６及び左右駆動装置７による
洗浄管先端開口３０の移動軌跡は、例えば図３に示すよ
うに符号３０Ａの位置から符号３０Ｂの位置まで順次ジ
グザグに移動するようにコントローラにプログラム設定
している。The locus of movement of the cleaning pipe tip opening 30 by the vertical drive device 6 and the left and right drive device 7 is programmed by the controller so as to sequentially move in a zigzag manner from the position of 30A to the position of 30B as shown in FIG. You have set.
【００３６】各洗浄管３，３の露出側端部には、それぞ
れ中継管３２の一端部が接続されている。又、図３に示
すように各中継管３２の他端部には、回転継手３３を介
して排水管３４が接続されている。尚、中継管３２他端
側の回転継手３３は、上記保持台５を軸支している各ピ
ン５２，５２と同心状にしており、保持台５が前後に揺
動したときに中継管３２も前後に揺動し得るようにして
いる。又、この第１実施形態では、図２に示すように、
各側の排水管３４，３４は、１本に合流させて、その合
流排水管３５にバルブ（電動バルブ）３６を取付けてい
る。One end of the relay pipe 32 is connected to the exposed end of each of the cleaning pipes 3 and 3. As shown in FIG. 3, a drain pipe 34 is connected to the other end of each relay pipe 32 via a rotary joint 33. The rotary joint 33 at the other end of the relay tube 32 is concentric with the pins 52, 52 that support the holding table 5, and when the holding table 5 swings back and forth, the relay tube 32 is rotated. Also can swing back and forth. In the first embodiment, as shown in FIG.
The drain pipes 34, 34 on each side are merged into one, and a valve (electric valve) 36 is attached to the merged drain pipe 35.
【００３７】導水管１には、両円割形ネット２Ａ，２Ｂ
の設置位置を挟んでその上流側と下流側にそれぞれ連通
管８１，８２を接続しており、該各連通管８１，８２内
の圧力差を差圧計８で検出し得るようにしている。この
差圧計８は、一定圧力差を検出すると、上記電動バルブ
３６を開放させる信号と、各上下駆動装置６，６及び各
左右駆動装置７，７の各モータ６１，７１を作動させる
信号と、必要に応じて警報装置（ブザー又は回転灯な
ど）を作動させる信号とを発するようになっている。
又、差圧計８が差圧非検出状態では、電動バルブ３６は
閉、上下駆動装置６及び左右駆動装置７の各モータ６
１，７１はＯＦＦとなっている。尚、他の実施形態で
は、連通管８１，８２及び差圧計８の信号によらず、こ
の異物除去装置を適宜手動にて運転するようにしてもよ
い。The water pipe 1 has two split nets 2A, 2B.
The communication pipes 81 and 82 are connected to the upstream side and the downstream side, respectively, with the installation position interposed therebetween, so that the pressure difference between the communication pipes 81 and 82 can be detected by the differential pressure gauge 8. When the differential pressure gauge 8 detects a constant pressure difference, a signal for opening the electric valve 36, a signal for operating the motors 61, 71 of the vertical drive devices 6, 6, and the left and right drive devices 7, 7, A signal for activating an alarm device (such as a buzzer or a rotating light) is issued as necessary.
When the differential pressure gauge 8 is not detecting the differential pressure, the electric valve 36 is closed, and the motors 6 of the vertical driving device 6 and the left and right driving device 7 are closed.
1, 71 are OFF. In another embodiment, the foreign matter removing device may be manually operated as appropriate without depending on the signals from the communication pipes 81 and 82 and the differential pressure gauge 8.
【００３８】次に、図１〜図３に示す第１実施形態の異
物除去装置を使用して行う異物除去方法を説明する。汲
み上げポンプ１６（図７）を作動させると、導水管１内
を冷却水（海水Ｗ0）が流通するが、その冷却水の大部
分は、各円割形ネット２Ａ，２Ｂの網目を通過して、濾
過された冷却水Ｗが復水器１４側に供給される。そし
て、その濾過された冷却水Ｗが復水器１４内の細管１５
を通って復水器１４内の水蒸気を冷却した後、海に排出
される。このとき、各円割形ネット２Ａ，２Ｂがきれい
な状態（ネット前面に異物Ａが付着していない状態）で
は、導水管１内を流通する冷却水（海水Ｗ0）が各ネッ
トの網目をさほど抵抗なく通過するので、該各ネット部
分にさほどの流通抵抗が発生せず（導水管１内における
異物除去装置の前後には、さほどの圧力差が発生しな
い）、差圧計８からの信号は発せられない。従って、電
動バルブ３６は閉、上下駆動装置６及び左右駆動装置７
の各モータ６１，７１はＯＦＦのままである。この状態
では、導水管１内の冷却水が洗浄管３を通って外部に排
出されることがなく、ポンプ１６で汲み上げた冷却水
（海水Ｗ0）の無駄が生じない。Next, a method for removing foreign matter using the foreign matter removing apparatus of the first embodiment shown in FIGS. 1 to 3 will be described. When the pump 16 (FIG. 7) is operated, cooling water (seawater W 0 ) flows through the water pipe 1, but most of the cooling water passes through the meshes of the split nets 2A and 2B. Thus, the filtered cooling water W is supplied to the condenser 14 side. Then, the filtered cooling water W is supplied to the thin tube 15 in the condenser 14.
After passing through the condenser 14 to cool the steam, the water is discharged to the sea. At this time, when the split nets 2A and 2B are clean (the foreign matter A is not attached to the front surface of the nets), the cooling water (seawater W 0 ) flowing through the water pipe 1 makes the meshes of the nets not so large. Since there is no resistance, there is not much flow resistance in each of the net portions (no significant pressure difference occurs before and after the foreign matter removing device in the water pipe 1), and the signal from the differential pressure gauge 8 is generated. I can't. Accordingly, the electric valve 36 is closed, and the vertical drive device 6 and the horizontal drive device 7 are closed.
Motors 61 and 71 remain OFF. In this state, the cooling water in the water pipe 1 is not discharged to the outside through the washing pipe 3, and the cooling water (sea water W 0 ) pumped by the pump 16 is not wasted.
【００３９】ところで、導水管１内を流通する冷却水
（海水Ｗ0）中には、除塵スクリーン１８（図７）で除
去できなかった異物Ａが混入しており、その異物Ａが各
ネット２Ａ，２Ｂ部分に達すると、そこで阻止されて該
ネット前面（凹球面２１）に順次付着するようになる。
すると、該付着異物Ａが流通抵抗となって、異物除去装
置設置部分の上流側（上流側連通管８１内）と下流側
（下流側連通管８２内）での圧力差が大きくなる。そし
て、その圧力差が差圧計８の設定圧力差に達すると、該
差圧計８から信号が発せられて、電動バルブ３６を開放
するとともに上下駆動装置６，６及び左右駆動装置７，
７を作動させる。この状態では、各円割形ネット２Ａ，
２Ｂの上流側近傍が高圧で各洗浄管３，３内が低圧とな
っているので、その圧力差によって各ネット２Ａ，２Ｂ
の凹球面２１に付着している異物Ａが水とともに洗浄管
３の先端開口３０から該洗浄管３内に自動的に導入され
る。尚、洗浄管３内に導入された異物混じりの水は、順
次中継管３２、排水管３４、３５を通って外部に排出さ
れる。又、このとき、上下駆動装置６及び左右駆動装置
７が作動していることによって、洗浄管３が設定プログ
ラムに基いて上下、左右に揺動せしめられており、その
先端開口３０が図３に示すように符号３０Ａの位置と符
号３０Ｂの間をジグザク状に走査する。従って、該洗浄
管３により、ネット凹球面２１の全面に亘って異物Ａの
清掃作業が行われる。又、このとき、各洗浄管３は、各
ネット２Ａ，２Ｂの曲率中心（軸受中心Ｐ）を支点にし
て揺動するので、洗浄管先端開口３０は、常にネット凹
球面２１に対して微小等間隔をもって移動するようにな
り、該先端開口３０からの異物導入作用がネット全面に
亘って均等に行われる。尚、この洗浄管３による清掃作
業は、差圧計８からの発信を受けて、洗浄管３の先端開
口３０が制御プログラムに従ってネット凹球面を走査完
了後、洗浄開始前の初期位置に復帰したのち電動バルブ
３６を閉止して終了となるように設定しておくとよい。
又、図示例のように、洗浄管３の先端開口３０の外周部
にフランジ状の突起３０ａを設けておくと、該先端開口
部付近を流れる冷却水Ｗ0に渦流が生じ、ネットに付着
している異物をより効果的に洗浄管３内に導入できる。By the way, in the cooling water (seawater W 0 ) flowing through the water pipe 1, foreign matter A which cannot be removed by the dust removing screen 18 (FIG. 7) is mixed. , 2B, it is blocked there and adheres sequentially to the front surface of the net (concave sphere 21).
Then, the adhered foreign matter A becomes a flow resistance, and the pressure difference between the upstream side (in the upstream communication pipe 81) and the downstream side (in the downstream communication pipe 82) of the portion where the foreign matter removing device is installed increases. When the pressure difference reaches the set pressure difference of the differential pressure gauge 8, a signal is issued from the differential pressure gauge 8, and the electric valve 36 is opened and the vertical drive devices 6, 6 and the left and right drive devices 7,
Activate 7 In this state, each split net 2A,
Since the pressure in the vicinity of the upstream side of 2B is high and the pressure in each of the washing pipes 3 is low, the pressure difference between the nets 2A, 2B
Foreign matter A adhering to the concave spherical surface 21 is automatically introduced into the cleaning tube 3 together with water from the tip opening 30 of the cleaning tube 3. The water mixed with foreign substances introduced into the washing pipe 3 is sequentially discharged to the outside through the relay pipe 32 and the drain pipes 34 and 35. Also, at this time, the cleaning tube 3 is swung up and down and left and right based on the setting program by the operation of the up and down driving device 6 and the left and right driving device 7, and the tip opening 30 is shown in FIG. As shown in the figure, the scanning is performed in a zigzag manner between the position of the reference numeral 30A and the reference numeral 30B. Therefore, the cleaning operation of the foreign substance A is performed by the cleaning pipe 3 over the entire surface of the net concave spherical surface 21. Further, at this time, each cleaning pipe 3 swings around the center of curvature (the bearing center P) of each net 2A, 2B as a fulcrum, so that the cleaning pipe tip opening 30 is always slightly smaller than the net concave spherical surface 21. It moves at intervals, and the foreign matter introduction action from the tip opening 30 is uniformly performed over the entire surface of the net. The cleaning operation by the cleaning pipe 3 is performed after the tip opening 30 of the cleaning pipe 3 has completed scanning of the concave spherical surface according to the control program in response to the transmission from the differential pressure gauge 8 and has returned to the initial position before the start of cleaning. It is preferable to set so that the electric valve 36 is closed to end the operation.
Also, as in the illustrated example, the previously provided a flange-like projections 30a on the outer periphery of the distal end opening 30 of the cleaning tube 3, vortex is generated in the cooling water W 0 flowing near the tip opening, attached to the net It is possible to more effectively introduce the foreign matter into the cleaning pipe 3.
【００４０】このように、第１実施形態の異物除去装置
では、各ネット２Ａ，２Ｂに異物Ａが付着しても、導水
管１内の冷却水流れを停止することなく、該付着異物Ａ
を清掃できる。又、洗浄管先端開口３０がネット凹球面
２１の全面に亘ってしかも該凹球面２１から微小等間隔
を隔てた位置を走査するので、少量の排水であっても逆
洗流速を十分に確保でき、それによってネットに付着し
た異物Ａをネット全面に亘って確実且つ効率よく除去で
きる。As described above, in the foreign matter removing apparatus according to the first embodiment, even if the foreign matter A adheres to each of the nets 2A and 2B, the foreign matter A does not stop flowing in the cooling water pipe 1 without stopping.
Can be cleaned. In addition, since the cleaning pipe tip opening 30 scans the position over the entire surface of the net concave spherical surface 21 and at a very small distance from the concave spherical surface 21, the backwash flow rate can be sufficiently secured even with a small amount of drainage. Thus, foreign matter A attached to the net can be reliably and efficiently removed over the entire surface of the net.
【００４１】図４〜図６に示す第２〜第４実施形態の異
物除去装置は、上記第１実施形態の変形例を示してい
る。The foreign matter removing apparatuses according to the second to fourth embodiments shown in FIGS. 4 to 6 are modifications of the first embodiment.
【００４２】図４の第２実施形態では、図１における上
流側の異物除去装置一式（上流側円割形ネット２Ａ、洗
浄管３、上下駆動装置６，左右駆動装置７）を省略した
ものである。この第２実施形態では、導水管１内の上半
部を流通する異物はネット２Ｂで除去できないが、該導
水管１内の下半部を流通する異物及び貝類のような比重
の大きい異物（下半部を流れる）は下半部に設置してい
るネット２Ｂで確実に捕獲できる。尚、図４には、詳細
を図示省略しているが、その他の構成は第１実施形態の
ものと同様である。In the second embodiment shown in FIG. 4, a set of the foreign matter removing device on the upstream side in FIG. 1 (the upstream side split net 2A, the washing pipe 3, the vertical driving device 6, the left and right driving device 7) is omitted. is there. In the second embodiment, foreign matter flowing in the upper half of the water pipe 1 cannot be removed by the net 2B, but foreign matter flowing in the lower half of the water pipe 1 and foreign matter having a large specific gravity such as shellfish ( (Flowing in the lower half) can be reliably captured by the net 2B installed in the lower half. Although details are not shown in FIG. 4, other configurations are the same as those of the first embodiment.
【００４３】図５の第３実施形態は、本願請求項３に対
応するものである。この第３実施形態では、上記図４の
異物除去装置において、導水管１内における下部側の円
割形ネット２Ｂの設置位置より上流側における、所定小
間隔を隔てた位置の上部側の導水管内面に邪魔板９を設
置している。この邪魔板９は、所定幅のものを導水管１
の内面に沿って円弧状に取付けている。The third embodiment shown in FIG. 5 corresponds to claim 3 of the present application. In the third embodiment, in the foreign matter removing device shown in FIG. 4, the upper part of the water pipe on the upstream side of the installation position of the lower split net 2 </ b> B in the water pipe 1 at a position separated by a predetermined small interval. A baffle 9 is installed on the surface. The baffle plate 9 is a predetermined width of the water pipe 1.
It is mounted in an arc along the inner surface of.
【００４４】この第３実施形態の異物除去装置では、導
水管１内の円割形ネット２Ｂに対応する側（下半部側）
を流れる異物混じりの海水Ｗ1は、そのまま直進して該
円割形ネット２Ｂで濾過される。他方、導水管１内の上
半部側を流れる海水Ｗ2の大部分は、邪魔板９が抵抗と
なって下方に変向せしめられた後、円割形ネット２Ｂで
濾過される。従って、邪魔板９を設けると、円割形ネッ
ト２Ｂを１枚だけ使用したもの（導水管１内の上半部が
無ネット部である）であっても、該１枚の円割形ネット
２Ｂで効率よく異物を捕獲できる。In the foreign matter removing apparatus according to the third embodiment, the side (lower half side) corresponding to the split net 2B in the water pipe 1 is provided.
Seawater W 1 of mingled foreign substances flowing through is filtered through a circular split-type nets 2B and straight ahead. On the other hand, most of the seawater W 2 through the half side on the inside water conduit 1, after being allowed deflected downwardly a baffle plate 9 the resistance is filtered through a circular split type net 2B. Therefore, if the baffle plate 9 is provided, even if only one split net 2B is used (the upper half of the water guide pipe 1 is a non-net portion), the single split net 2B is used. Foreign matter can be efficiently captured by 2B.
【００４５】図６の第４実施形態では、１枚のネット２
を導水管１の口径面積の全面に亘って設置している。こ
の場合、ネット２が大面積であるとその曲率半径を長く
する必要があり、それに伴って洗浄管３の長さを長くす
る必要があることから、この第４実施形態のものでは、
上記第１〜第３実施形態のものに比較して適応できる導
水管１の口径は小さくなる。尚、その他の基本構成は、
第１実施形態のものと同様である。In the fourth embodiment shown in FIG. 6, one net 2
Is installed over the entire surface area of the diameter of the water pipe 1. In this case, if the net 2 has a large area, it is necessary to increase the radius of curvature, and accordingly, it is necessary to increase the length of the washing pipe 3. Therefore, in the fourth embodiment,
The diameter of the water guide pipe 1 that can be applied is smaller than that of the first to third embodiments. In addition, other basic configurations
This is the same as that of the first embodiment.
【００４６】尚、本願各実施形態の異物除去装置は、既
設の導水管１内にも設置することができる。The foreign matter removing device according to each embodiment of the present invention can be installed in the existing water pipe 1.
【００４７】[0047]
【発明の効果】本願請求項１及び２の発明では、導水管
１内の流水Ｗ0中に浮遊する異物Ａがネット（２，２
Ａ，２Ｂ）に付着しても、洗浄管３により、導水管１内
の冷却水流れを停止することなく、該付着異物Ａを清掃
できるので、運転効率が向上するという効果がある。特
に、例えば原子力発電所のように、運転を中断すること
が困難な設備においては、一層顕著な効果を発揮する。
又、洗浄管先端開口３０がネット凹球面２１の全面に亘
ってしかも該凹球面２１から微小等間隔を隔てた位置を
走査するので、少量の排水であっても逆洗流速を十分に
確保でき、それによってネットに付着した異物Ａをネッ
ト全面に亘って確実且つ効率よく除去できるという効果
がある。In the present claims 1 and 2 the invention according to the present invention, foreign object A floating in running water W 0 in the conduit 1 Internet (2,2
A, 2B), even if it adheres, the washing pipe 3 can clean the adhering foreign matter A without stopping the flow of the cooling water in the water pipe 1, so that the operation efficiency is improved. In particular, in a facility where it is difficult to interrupt the operation such as a nuclear power plant, a more remarkable effect is exhibited.
In addition, since the cleaning pipe tip opening 30 scans the position over the entire surface of the net concave spherical surface 21 and at a very small distance from the concave spherical surface 21, the backwash flow rate can be sufficiently secured even with a small amount of drainage. Thus, there is an effect that foreign matter A attached to the net can be reliably and efficiently removed over the entire surface of the net.
【００４８】又、本願請求項３の異物除去装置では、ネ
ットとして１枚の円割形ネット２Ｂのみを使用したもの
であっても、その上流側に邪魔板９を設置しているの
で、導水管１内の反ネット側を流れる異物混じりの冷却
水をネット側に変向させることができ、簡単な構成（邪
魔板９）の付加のみで、効率よく異物Ａを除去できると
いう効果がある。In the foreign matter removing apparatus according to the third aspect of the present invention, even if only one split net 2B is used as the net, the baffle plate 9 is installed upstream of the net, so The cooling water mixed with the foreign matter flowing on the side opposite to the net in the water pipe 1 can be turned to the net side, and there is an effect that the foreign matter A can be efficiently removed only by adding a simple configuration (the baffle plate 9).
【図１】本願第１実施形態の異物除去装置の断面図であ
る。FIG. 1 is a sectional view of a foreign matter removing device according to a first embodiment of the present application.
【図２】図１の平面図である。FIG. 2 is a plan view of FIG.
【図３】図１のIII−III断面図である。FIG. 3 is a sectional view taken along the line III-III of FIG. 1;
【図４】本願第２実施形態の異物除去装置の概略断面図
である。FIG. 4 is a schematic sectional view of a foreign matter removing device according to a second embodiment of the present application.
【図５】本願第３実施形態の異物除去装置の概略断面図
である。FIG. 5 is a schematic sectional view of a foreign matter removing device according to a third embodiment of the present invention.
【図６】本願第４実施形態の異物除去装置の概略断面図
である。FIG. 6 is a schematic sectional view of a foreign matter removing device according to a fourth embodiment of the present application.
【図７】発電設備の概略図である。FIG. 7 is a schematic diagram of a power generation facility.
【図８】従来の異物除去装置の一例の断面図である。FIG. 8 is a sectional view of an example of a conventional foreign matter removing device.
１は導水管、２はネット、２Ａ，２Ｂは円割形ネット、
３は洗浄管、４は球形軸受、６は上下駆動装置、７は左
右駆動装置、８は差圧計、９は邪魔板、２１は凹球面、
３０は先端開口、Ａは異物、Ｗは冷却水、Ｐはネット曲
率半径の中心位置である。1 is a water pipe, 2 is a net, 2A and 2B are split-shaped nets,
3 is a washing tube, 4 is a spherical bearing, 6 is a vertical driving device, 7 is a left and right driving device, 8 is a differential pressure gauge, 9 is a baffle plate, 21 is a concave spherical surface,
Reference numeral 30 denotes a tip opening, A denotes a foreign substance, W denotes cooling water, and P denotes a center position of a net radius of curvature.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大西 恵一 香川県三豊郡豊中町本山乙137−１ (72)発明者 渡部 正路 香川県木田郡牟礼町牟礼1264−４ (72)発明者 平田 健二 香川県綾歌郡綾南町陶1635−13 (72)発明者 佐藤 元信 香川県綾歌郡綾歌町富熊4173−１ ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Keiichi Onishi 137-1 Motoyama Otoyama, Toyonaka-machi, Mitoyo-gun, Kagawa Prefecture (72) Inventor Masaji Watanabe 1264-4, Mure-cho, Mure-cho, Kida-gun, Kagawa Prefecture (72) Inventor Kenji Hirata, Kagawa 1635-13, Ayanami-cho, Ayanaka-gun, Prefecture (72) Inventor Motonobu Sato 417-13-1 Tokuma, Ayaka-cho, Aya-gun, Kagawa Prefecture
Claims (3)
（Ａ）を、上流側から見て凹球面状のネット（２，２
Ａ，２Ｂ）で捕獲し、 該ネット（２，２Ａ，２Ｂ）の凹球面（２１）で捕獲し
た異物（Ａ）を前記導水管（１）内の流水を停止するこ
となく洗浄管（３）で外部に導入排除するようにし、 さらに該洗浄管（３）の先端開口（３０）を、前記ネッ
ト（２，２Ａ，２Ｂ）の凹球面（２１）に対して微小間
隔を隔てた近接状態で且つネット凹球面（２１）の曲率
半径（Ｒ）を中心にして、該ネット全面に亘ってジグザ
グ状に走査させるようにした、 ことを特徴とする導水管内の異物除去方法。A foreign matter (A) floating in running water in a water pipe (1) is formed into a concave spherical net (2, 2) when viewed from an upstream side.
A, 2B), and the foreign matter (A) captured by the concave spherical surface (21) of the net (2, 2A, 2B) is washed without stopping the running water in the water pipe (1). Then, the leading end opening (30) of the washing pipe (3) is brought into close proximity to the concave spherical surface (21) of the net (2, 2A, 2B) at a small interval. A method for removing foreign matter in a water guide pipe, wherein scanning is performed in a zigzag manner over the entire surface of the net centered on the radius of curvature (R) of the net concave spherical surface (21).
に、上流側から見て凹球面状のネット（２，２Ａ，２
Ｂ）を設置し、 該ネット（２，２Ａ，２Ｂ）の上流側近傍位置に、水と
ともに異物（Ａ）を導入排除し得る洗浄管（３）を設置
し、 該洗浄管（３）は、前記ネット（２，２Ａ，２Ｂ）の凹
球面（２１）の曲率半径（Ｒ）の中心位置（Ｐ）におい
て球形軸受（４）で軸支して、該洗浄管（３）の先端開
口（３０）が前記球形軸受（４）を中心にして上下及び
左右に移動自在となるようにする一方、 前記洗浄管（３）の先端開口（３０）を前記ネット凹球
面（２１）に対して微小間隔を隔てて近接させるととも
に、 前記洗浄管（３）を上下方向に揺動させる上下駆動装置
（６）と、前記洗浄管（３）を左右方向に揺動させる左
右駆動装置（７）とを備えた、 ことを特徴とする導水管内の異物除去装置。2. A net (2, 2A, 2) having a concave spherical shape as viewed from the upstream side in a water pipe (1) through which water (W 0 ) flows.
B), and a washing pipe (3) capable of introducing and removing foreign matter (A) together with water is installed at a position near the upstream side of the net (2, 2A, 2B). At the center position (P) of the radius of curvature (R) of the concave spherical surface (21) of the net (2, 2A, 2B), the cleaning tube (3) is pivotally supported at the center position (P) by the spherical bearing (4). ) Is movable vertically and horizontally about the spherical bearing (4), while the tip opening (30) of the washing tube (3) is spaced a minute distance from the net concave spherical surface (21). A vertical drive unit (6) for swinging the washing pipe (3) in the vertical direction, and a left and right drive unit (7) for swinging the washing pipe (3) in the horizontal direction. An apparatus for removing foreign matter in a water pipe.
（１）内の口径方向断面積の一部を割徐した面積の円割
形ネット（２Ｂ）とし、前記導水管（１）内における前
記円割形ネット設置位置より上流側に所定小間隔を隔て
た位置で且つ該円割形ネット設置位置とは径方向反対側
の導水管内面に邪魔板（９）を設置したことを特徴とす
る導水管内の異物除去装置。3. The net according to claim 2, wherein the net is a split net (2B) having an area obtained by reducing a part of the cross-sectional area in the radial direction in the water pipe (1), and the net in the water pipe (1) is provided. A baffle plate (9) is installed on the inner surface of the water pipe at a position at a predetermined small interval upstream of the split net installation position and on the opposite side of the split net installation position in the radial direction. Foreign matter removal device in water pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32020297A JP4026902B2 (en) | 1997-11-21 | 1997-11-21 | Foreign substance removal device in water conduit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32020297A JP4026902B2 (en) | 1997-11-21 | 1997-11-21 | Foreign substance removal device in water conduit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11153286A true JPH11153286A (en) | 1999-06-08 |
| JP4026902B2 JP4026902B2 (en) | 2007-12-26 |
Family
ID=18118856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32020297A Expired - Fee Related JP4026902B2 (en) | 1997-11-21 | 1997-11-21 | Foreign substance removal device in water conduit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4026902B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013100613A (en) * | 2011-11-08 | 2013-05-23 | Oriental:Kk | Foreign substance eliminator for used paper recycling apparatus and used paper recycling apparatus for shredded document using the same |
-
1997
- 1997-11-21 JP JP32020297A patent/JP4026902B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013100613A (en) * | 2011-11-08 | 2013-05-23 | Oriental:Kk | Foreign substance eliminator for used paper recycling apparatus and used paper recycling apparatus for shredded document using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4026902B2 (en) | 2007-12-26 |
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