JP4286824B2 - Water stop device and generator unit inspection method using the water stop device - Google Patents

Water stop device and generator unit inspection method using the water stop device Download PDF

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JP4286824B2
JP4286824B2 JP2005282153A JP2005282153A JP4286824B2 JP 4286824 B2 JP4286824 B2 JP 4286824B2 JP 2005282153 A JP2005282153 A JP 2005282153A JP 2005282153 A JP2005282153 A JP 2005282153A JP 4286824 B2 JP4286824 B2 JP 4286824B2
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generator unit
water
stop device
water stop
support member
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JP2007092364A (en
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中村  聡
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Chugoku Electric Power Co Inc
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
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Description

本発明は、水力発電所の発電機ユニットに設けられた水圧鉄管に取り付けられる止水装置に関し、特に、点検、整備時に用いられる止水装置に関するものである。   The present invention relates to a water stop device attached to a hydraulic iron pipe provided in a generator unit of a hydroelectric power plant, and more particularly to a water stop device used for inspection and maintenance.

水力発電所においては、発電機ユニットの機能維持と予防保全を目的として、発電機ユニット単位で部位を分解して、消耗部品・不具合部品を故障が生じる前に予め交換するための細密点検を12〜15年に1回の周期で、2ヶ月程度の時間をかけて実施している。また、発電機ユニットの細密点検時は発電機ユニットの上流側に設置されている入口弁も点検対象であり、この入口弁の点検には、脱着作業及び点検に2ヶ月程度を要している。   In hydroelectric power stations, for the purpose of maintaining the functions of the generator unit and preventive maintenance, the parts are disassembled in units of generator units, and a thorough inspection is performed to replace consumable parts and defective parts in advance before failure occurs. It takes about 2 months for every 15 years. In addition, during the detailed inspection of the generator unit, the inlet valve installed on the upstream side of the generator unit is also subject to inspection, and the inspection of this inlet valve requires about two months for desorption work and inspection. .

例えば、1本の水圧鉄管から分岐された2本の水圧鉄管の下流側にそれぞれ発電機ユニットが接続されている場合においては、一方の発電機ユニットの細密点検期間中の入口弁は止水機能を果たさないために、他方の発電機ユニットを稼働させようと鉄管水路に水を流すと、一方の発電機ユニットから大量の水が漏水してしまう。これでは水資源を消失させるとともに、漏水により周囲の環境を悪化させてしまう。そこで、漏水を防ぐためには鉄管水路内を断水しなければならず、他方の発電機ユニットに水を供給することができないために、他方の発電機ユニットも停止させ、一方の発電機ユニットの点検が終了するのを待って他方の発電機ユニットを稼働させていた。   For example, when the generator unit is connected to the downstream side of two hydraulic iron pipes branched from one hydraulic iron pipe, the inlet valve during the close inspection period of one generator unit is a water stop function. Therefore, if water is caused to flow through the iron pipe channel so as to operate the other generator unit, a large amount of water leaks from the one generator unit. This causes water resources to disappear and the surrounding environment to deteriorate due to water leakage. Therefore, in order to prevent water leakage, the inside of the iron pipe water channel must be shut off, and water cannot be supplied to the other generator unit. Therefore, the other generator unit is also stopped, and one generator unit is inspected. The other generator unit was in operation waiting for the end.

上述した水力発電所における発電機ユニットの細密点検時に、発電可能な点検対象外の発電機ユニットも停止させる方法では、発電機ユニットの稼働率が低下するという問題点があった。
また、1つの河川水系内で複数の発電機ユニットを同時に停止させると、発電機ユニットの停止にともなうダム貯水量の変化及び送電線潮流の変化等の影響が大きく、ダム貯水量の調整及び送電線潮流の調整が困難であり、多大な労力を要するという問題点があった。
In the above-described detailed inspection of the generator unit at the hydroelectric power station, the method of stopping the generator unit that is not subject to inspection capable of generating power has a problem in that the operating rate of the generator unit decreases.
In addition, if multiple generator units are stopped at the same time in one river system, the effects of changes in dam water storage and transmission line tide due to the generator unit stoppage are significant, and adjustment and transmission of dam water storage It was difficult to adjust the power flow and required a lot of labor.

そこで、本発明は、上記の問題点を鑑みてなされたものであり、水力発電所の発電機ユニットを点検、整備する際に、水圧鉄管に取り付けられて発電機ユニットへ流入する水を止水し、点検対象外の発電機ユニットの稼働を可能にする止水装置を提供することを目的としている。   Accordingly, the present invention has been made in view of the above problems, and when inspecting and servicing a generator unit of a hydroelectric power plant, water attached to a hydraulic iron pipe and flowing into the generator unit is stopped. And it aims at providing the water stop apparatus which enables operation of the generator unit which is not an inspection object.

上記問題を解決する本発明の止水装置は、複数の発電機ユニットを備え、各発電機ユニットの取水部に入口弁が設けられた水力発電所における発電機ユニットを点検する際に用いられ、発電機ユニットへ流入する水を止水するための止水装置であって、前記発電機ユニットへ水を送水する水圧鉄管に脱着可能に取り付けられ、水の流れを停止するための閉鎖部材と、前記発電機ユニットに脱着可能に取り付けられる支持部材と、前記閉鎖部材と前記支持部材とを連結する連結部材とを備え、前記連結部材は、円筒形状を有し、一端が前記支持部材に接続される外筒と、円筒形状を有し、一端は前記閉鎖部材に接続され、他端は前記外筒内に摺動可能に挿通される内筒と、前記内筒を前記外筒に対して摺動させるための摺動機構と、該摺動機構の摺動を制止するためのロック機構とを備え、前記連結部材の軸方向の長さは前記摺動機構を調整することにより可変であることを特徴とする(第1の発明)。 The water stop device of the present invention that solves the above problems is used when inspecting a generator unit in a hydroelectric power plant that includes a plurality of generator units and is provided with an inlet valve in a water intake section of each generator unit. A water stopping device for stopping water flowing into the generator unit, detachably attached to a hydraulic iron pipe for supplying water to the generator unit, and a closing member for stopping the flow of water; A support member that is detachably attached to the generator unit; and a connection member that connects the closure member and the support member. The connection member has a cylindrical shape, and one end is connected to the support member. An outer cylinder having a cylindrical shape, one end connected to the closing member, and the other end slidably inserted into the outer cylinder, and the inner cylinder slidable relative to the outer cylinder. Sliding mechanism for moving the sliding mechanism And a locking mechanism for restraining the sliding, the axial length of the connecting member is characterized by a variable by adjusting the sliding mechanism (the first invention).

本発明によれば、発電機ユニットへ水を送水するための水圧鉄管に脱着可能に取り付けられ、水の流れを停止する閉鎖部材と、発電機ユニットに脱着可能に取り付けられる支持部材と、閉鎖部材と支持部材とを連結する連結部材とを備えることにより水圧鉄管から発電機ユニットへ流入する水を確実に止水することが可能である。したがって、1本の水圧鉄管の下流側に複数の発電機ユニットが設置されている場合において、点検対象の発電機ユニットのみを停止させ、点検対象外の発電機ユニットを稼働させることが可能となり、発電機ユニットの稼働率が向上する。   According to the present invention, a closure member that is detachably attached to a hydraulic iron pipe for supplying water to the generator unit, stops the flow of water, a support member that is detachably attached to the generator unit, and a closure member By providing a connecting member that connects the support member and the support member, it is possible to reliably stop water flowing from the hydraulic iron pipe to the generator unit. Therefore, in the case where a plurality of generator units are installed on the downstream side of one hydraulic iron pipe, it is possible to stop only the generator unit to be inspected and operate the generator unit not to be inspected. The operating rate of the generator unit is improved.

また、支持部材は発電機ユニットに接続されているために、水圧鉄管内に水を流したときに閉鎖部材に作用し、連結部材を介して支持部材に伝達される水圧に対して反力材として作用する。したがって、点検対象外の発電機ユニットを稼働させるために、水圧鉄管内に水を大量に流しても、閉鎖部材のみで止水した場合と比べて脱落する可能性が低くなり、確実に、かつ安全に止水装置を水圧鉄管に取り付けることが可能となる。
さらに、連結部材は、支持部材に接続される外筒と、一端は閉鎖部材に接続され、他端は閉塞されて外筒内に摺動可能に挿通される内筒と、内筒を外筒に対して摺動させるための摺動機構と、該摺動機構の摺動を制止するためのロック機構とを備え、この摺動機構を調整することにより、内筒が外筒に対して摺動し、連結部材の長さを変更することができるために、多くの発電機ユニットに適用することが可能である。
また、止水装置の長さをロック機構にて固定するために、閉鎖部材と支持部材との距離を長期間正確に保持することが可能である。
Further, since the support member is connected to the generator unit, it acts on the closing member when water flows into the hydraulic iron pipe, and is a reaction force material against the water pressure transmitted to the support member via the connecting member. Acts as Therefore, in order to operate a generator unit that is not subject to inspection, even if a large amount of water is flowed into the hydraulic iron pipe, the possibility of falling off is lower than when the water is stopped with only the closing member, and It is possible to safely attach the water stop device to the hydraulic iron pipe.
Further, the connecting member includes an outer cylinder connected to the support member, an inner cylinder connected at one end to the closing member, the other end closed and slidably inserted into the outer cylinder, and the inner cylinder connected to the outer cylinder. A sliding mechanism for sliding against the outer cylinder, and a lock mechanism for stopping the sliding mechanism. By adjusting the sliding mechanism, the inner cylinder slides relative to the outer cylinder. Since it can move and the length of a connection member can be changed, it can be applied to many generator units.
Further, since the length of the water stop device is fixed by the lock mechanism, the distance between the closing member and the support member can be accurately maintained for a long period of time.

第2の発明は、第1の発明において、前記閉鎖部材は、前記水圧鉄管と同心で、かつ径の異なる複数の円周上にボルト穴を有することを特徴とする。
本発明によれば、閉鎖部材は、径の異なる複数の円周上にボルト穴を有するために、径の異なる水圧鉄管に取り付けることが可能である。したがって、多くの発電機ユニットに適用することが可能である。
According to a second invention, in the first invention, the closing member has bolt holes on a plurality of circumferences that are concentric with the hydraulic iron pipe and have different diameters.
According to the present invention, since the closing member has bolt holes on a plurality of circumferences having different diameters, the closing member can be attached to hydraulic iron pipes having different diameters. Therefore, it can be applied to many generator units.

第3の発明は、第1の発明において、前記支持部材は、前記発電機ユニットの前記取水部と同心で、かつ径の異なる複数の円周上にボルト挿通孔を有することを特徴とする。
本発明によれば、支持部材は、径の異なる複数の円周上にボルト挿通孔を有するために、径の異なる発電機ユニットの取水部に取り付けることが可能である。したがって、多くの発電機ユニットに適用することが可能である。
According to a third aspect, in the first aspect, the support member has bolt insertion holes on a plurality of circumferences that are concentric with the intake section of the generator unit and have different diameters.
According to the present invention, since the support member has bolt insertion holes on a plurality of circumferences having different diameters, the support member can be attached to the water intake portion of the generator unit having different diameters. Therefore, it can be applied to many generator units.

の発明の発電機ユニットの点検方法は、複数の発電機ユニットを備え、各発電機ユニットの取水部に入口弁が設けられた水力発電所における発電機ユニットの点検を、止水装置を用いて行う方法において、前記止水装置は、前記発電機ユニットへ水を送水する水圧鉄管に脱着可能に取り付けられ、水の流れを停止するための閉鎖部材と、前記発電機ユニットに脱着可能に取り付けられる支持部材と、前記閉鎖部材と前記支持部材とを連結する連結部材とを備え、前記連結部材は、円筒形状を有し、一端が前記支持部材に接続される外筒と、円筒形状を有し、一端は前記閉鎖部材に接続され、他端は前記外筒内に摺動可能に挿通される内筒と、前記内筒を前記外筒に対して摺動させるための摺動機構と、該摺動機構の摺動を制止するためのロック機構とを備え、前記連結部材の軸方向の長さは前記摺動機構を調整することにより可変であり、前記止水装置の長さが、点検対象の発電機ユニットへ水を送水する水圧鉄管の取付面と、前記点検対象の発電ユニットの取付面との距離と同じとなるように、前記連結部材の軸方向の長さを調整し、前記点検対象の発電機ユニットへ水を送水する水圧鉄管に前記閉塞部材を取り付けると共に前記支持部材を前記点検対象の発電機ユニットに取り付けて、該発電機ユニットへの水の流れを停止し、点検対象外の発電機ユニットへは送水を継続し、前記点検対象の発電機ユニットを点検するとともに、点検対象外の発電機ユニットは発電を継続することを特徴とする。
本発明によれば、点検対象の発電機ユニットへ水を送水するための水圧鉄管と発電機ユニットの取水部との間に止水装置を取り付け、この発電機ユニットへの水の流れを停止し、点検対象外の発電機ユニットへは送水を継続し、点検対象の発電機ユニットを点検するとともに、点検対象外の発電機ユニットは発電を継続するために、発電機ユニットの稼働率を向上させることが可能である。
According to a fourth aspect of the present invention, there is provided a method for inspecting a generator unit comprising: a plurality of generator units, wherein the generator unit is inspected at a hydroelectric power plant provided with an inlet valve at a water intake portion of each generator unit ; In the method of using the water stop device, the water stop device is detachably attached to a hydraulic iron pipe for supplying water to the generator unit, and a closure member for stopping the flow of water and the detachable member to the generator unit. A support member to be attached; and a connecting member that connects the closing member and the support member. The connecting member has a cylindrical shape, and an outer cylinder having one end connected to the supporting member, and a cylindrical shape. An inner cylinder having one end connected to the closing member and the other end slidably inserted into the outer cylinder; and a sliding mechanism for sliding the inner cylinder relative to the outer cylinder; , For stopping sliding of the sliding mechanism The length of the connecting member in the axial direction is variable by adjusting the sliding mechanism, and the length of the water stop device feeds water to the generator unit to be inspected. The axial length of the connecting member is adjusted so that the distance between the mounting surface of the hydraulic iron pipe and the mounting surface of the power generation unit to be inspected is the same, and water is supplied to the generator unit to be inspected. Attach the closing member to the hydraulic iron pipe to be attached and attach the support member to the generator unit to be inspected, stop the flow of water to the generator unit, and continue water supply to the generator unit not to be inspected The generator unit to be inspected is inspected, and the generator unit not to be inspected continues to generate power.
According to the present invention, a water stop device is attached between the hydraulic iron pipe for feeding water to the generator unit to be inspected and the intake section of the generator unit, and the flow of water to the generator unit is stopped. Continue to supply water to non-inspected generator units, inspect generator units that are not inspected, and improve generator unit availability so that non-inspected generator units continue to generate electricity. It is possible.

本発明による止水装置は、水力発電所の発電機ユニットを点検、整備する際に水圧鉄管に取り付けられて発電機ユニットへ流入する水を止水し、点検、整備対象外の発電機ユニットの稼働を可能にする。   The water stop device according to the present invention stops water flowing into the generator unit attached to the hydraulic iron pipe when inspecting and maintaining the generator unit of the hydroelectric power station, and Enable operation.

また、止水装置は、閉鎖部材、支持部材はそれぞれ径の異なる水圧鉄管、発電機ユニットに取り付け可能で、長さも可変であることから、多くの発電機ユニットに適用することが可能である。したがって、止水装置を発電機ユニット毎に製作する必要が無くなり、コストを削減することが可能となる。   Further, the water stop device can be applied to many generator units because the closing member and the support member can be attached to hydraulic iron pipes and generator units having different diameters and the length is variable. Therefore, it is not necessary to manufacture the water stop device for each generator unit, and the cost can be reduced.

以下、本発明に係る好ましい実施形態について図面を用いて詳細に説明する。
図1は、本発明の第一実施形態に係る止水装置を発電機ユニットに取り付けた状態を示す平面図である。図1に示すように、説明の便宜上、本実施形態においては、例えば、1本の水圧鉄管1から分岐された2本の水圧鉄管2の下流側にそれぞれ入口弁6を介して接続されている発電機ユニット3、4のうち、発電機ユニット3に止水装置5を取り付けて発電機ユニット3のみを点検、整備する方法について説明する。ここで、2本の水圧鉄管2の径は互いに異なるものとする。
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view showing a state in which a water stop device according to a first embodiment of the present invention is attached to a generator unit. As shown in FIG. 1, for convenience of explanation, in the present embodiment, for example, they are connected to the downstream sides of two hydraulic iron pipes 2 branched from one hydraulic iron pipe 1 via inlet valves 6, respectively. A method of inspecting and maintaining only the generator unit 3 by attaching the water stop device 5 to the generator unit 3 among the generator units 3 and 4 will be described. Here, the diameters of the two hydraulic iron pipes 2 are different from each other.

図2は、本実施形態に係る止水装置5を発電機ユニット3と水圧鉄管2との間に取り付けた状態の止水装置5の中心線11より上部のみを示す断面図である。図2に示すように、止水装置5は、水圧鉄管2に脱着可能に取り付けられ、水の流れを停止するための閉鎖部材7と、発電機ユニット3の取水部に脱着可能に取り付けられる支持部材8と、閉鎖部材7と支持部材8とを連結する連結部材9とを備える。   FIG. 2 is a cross-sectional view showing only the part above the center line 11 of the water stop device 5 in a state where the water stop device 5 according to the present embodiment is attached between the generator unit 3 and the hydraulic iron pipe 2. As shown in FIG. 2, the water stop device 5 is detachably attached to the hydraulic iron pipe 2, and a closing member 7 for stopping the flow of water and a support detachably attached to the water intake portion of the generator unit 3. A member 8 and a connecting member 9 that connects the closing member 7 and the supporting member 8 are provided.

閉鎖部材7は、水圧鉄管2から発電機ユニット3への流水を止水し、かつ水圧鉄管2端部のフランジ10に接続されるように円板形状を有する。そして、閉鎖部材7には、ボルト穴13a、13bが水圧鉄管2の中心線11と同心で、かつ異なる径の2つの円周上にそれぞれ設けられている。また、これらの円周上の周囲には止水性を向上させるためのシール材14がそれぞれ環状に設けられている。   The closing member 7 has a disk shape so as to stop flowing water from the hydraulic iron pipe 2 to the generator unit 3 and to be connected to the flange 10 at the end of the hydraulic iron pipe 2. The closing member 7 is provided with bolt holes 13a and 13b on two circumferences that are concentric with the center line 11 of the hydraulic iron pipe 2 and have different diameters. In addition, seal members 14 for improving water-stopping properties are provided around the circumferences of the circles, respectively.

支持部材8は、発電機ユニット3の取水部のフランジ15に接続されるようにドーナツ型の形状を有する。そして、支持部材8には、止水装置取付ボルト29を挿通するための発電機ユニット取付用挿通孔18a、18b、18cが発電機ユニット3の取水部の中心線11と同心で、かつ異なる径の3つの円周上にそれぞれ設けられている。また、支持部材8には、摺動用ボルト25を挿通するための内筒調整用挿通孔22が連結部材9の中心線11の同心円上に設けられている。   The support member 8 has a donut shape so as to be connected to the flange 15 of the water intake portion of the generator unit 3. And in the support member 8, the generator unit mounting insertion holes 18a, 18b, 18c for inserting the water stop device mounting bolts 29 are concentric with the center line 11 of the water intake portion of the generator unit 3 and have different diameters. Are provided on three circumferences. Further, the support member 8 is provided with an inner cylinder adjusting insertion hole 22 for inserting the sliding bolt 25 on a concentric circle of the center line 11 of the connecting member 9.

なお、本実施形態においては、閉鎖部材7には径の異なる2つの円周上にそれぞれボルト穴13a、13bを、支持部材8には径の異なる3つの円周上にそれぞれ発電機ユニット取付用挿通孔18a、18b、18cを設けたが、これに限定されるものではなく、例えば、径の異なる4つ以上の円周上にそれぞれボルト穴13、発電機ユニット取付用挿通孔18を設けてもよい。   In this embodiment, the closure member 7 has bolt holes 13a and 13b on two circumferences having different diameters, and the support member 8 has a generator unit attached on three circumferences having different diameters. Although the insertion holes 18a, 18b, and 18c are provided, the present invention is not limited thereto. For example, the bolt holes 13 and the generator unit mounting insertion holes 18 are provided on four or more circumferences having different diameters. Also good.

連結部材9は、一端(図中右端)が支持部材8に溶接された円筒状の外筒19と、一端(図中左端)が閉鎖部材7に接続され、外筒19内に摺動可能に挿通された円筒状の内筒20と、内筒20を外筒19に対して摺動させるための摺動機構21と、この摺動機構21の摺動を制止するためのロック機構34とを備える。   The connecting member 9 has a cylindrical outer cylinder 19 whose one end (right end in the figure) is welded to the support member 8, and one end (left end in the figure) is connected to the closing member 7 so that it can slide in the outer cylinder 19. The inserted cylindrical inner cylinder 20, a sliding mechanism 21 for sliding the inner cylinder 20 with respect to the outer cylinder 19, and a lock mechanism 34 for stopping the sliding of the sliding mechanism 21. Prepare.

内筒20は、内筒20の両端に、内周面から内方に向かって鍔状に張り出したフランジ23a、23bと、これらのフランジ23a、23bにボルトを挿通するための挿通孔24a、24bとを有する。内筒20の一端側のフランジ23aに設けられた挿通孔24aを介してボルト12を閉鎖部材7に螺合させることにより、内筒20が閉鎖部材7に圧接固定されている。   The inner cylinder 20 has flanges 23a, 23b projecting inward from the inner peripheral surface at both ends of the inner cylinder 20, and insertion holes 24a, 24b for inserting bolts into the flanges 23a, 23b. And have. The inner cylinder 20 is press-fitted and fixed to the closing member 7 by screwing the bolt 12 into the closing member 7 through an insertion hole 24 a provided in the flange 23 a on one end side of the inner cylinder 20.

摺動機構21は、内筒20のフランジ23bに設けられた挿通孔24bと支持部材8の内筒調整用挿通孔22とに挿通される摺動用ボルト25と、内筒20のフランジ23bを挟持するように摺動用ボルト25に螺合される内筒固定用ナット26a、26bとからなり、摺動用ボルト25を回転させることにより、内筒20は外筒19内を摺動する。   The sliding mechanism 21 sandwiches a sliding bolt 25 inserted into an insertion hole 24 b provided in the flange 23 b of the inner cylinder 20 and an inner cylinder adjustment insertion hole 22 of the support member 8, and the flange 23 b of the inner cylinder 20. The inner cylinder 20 slides in the outer cylinder 19 by rotating the sliding bolt 25. The inner cylinder fixing nuts 26a and 26b are screwed into the sliding bolt 25.

ロック機構34は、摺動用ボルト25に螺合される支持部材固定用ナット27からなり、この支持部材固定用ナット27を締め付けることにより、摺動用ボルト25の回転が阻止され、摺動機構21が摺動することを防止する。摺動機構21が固定されることにより、連結部材9の端部がそれぞれ接続されている閉鎖部材7と支持部材8との距離も一定となり、止水装置5の長さが固定される。   The lock mechanism 34 includes a support member fixing nut 27 that is screwed to the sliding bolt 25. By tightening the support member fixing nut 27, the rotation of the sliding bolt 25 is prevented, and the sliding mechanism 21 is Prevent sliding. By fixing the sliding mechanism 21, the distance between the closing member 7 and the supporting member 8 to which the end portions of the connecting members 9 are respectively connected is also fixed, and the length of the water stop device 5 is fixed.

なお、本実施形態において、摺動機構21はねじにより摺動する方法について説明し、ロック機構34は、このねじの回転を阻止するナットについて説明したが、これに限定されるものではなく、摺動機構21は内筒20を外筒19に対して摺動させるための機構であれば他の方法を用いてもよく、さらに、ロック機構34は内筒20が摺動する動作を制止するための方法であれば他の方法を用いてもよい。   In the present embodiment, the sliding mechanism 21 has been described with respect to a method of sliding with a screw, and the locking mechanism 34 has been described with respect to a nut that prevents the rotation of the screw. However, the present invention is not limited to this. As long as the moving mechanism 21 is a mechanism for sliding the inner cylinder 20 with respect to the outer cylinder 19, other methods may be used. Further, the lock mechanism 34 is used to prevent the inner cylinder 20 from sliding. Any other method may be used.

支持部材固定用ナット27を緩め、摺動用ボルト25を回転させることにより、内筒20は外筒19内を摺動する。内筒20が外筒19内を摺動することにより、連結部材9の長さが変化すると同時に、連結部材9の端部がそれぞれ接続されている閉鎖部材7と支持部材8との距離も変化し、止水装置5の長さが変化する。   The inner cylinder 20 slides in the outer cylinder 19 by loosening the support member fixing nut 27 and rotating the sliding bolt 25. As the inner cylinder 20 slides in the outer cylinder 19, the length of the connecting member 9 changes, and at the same time, the distance between the closing member 7 and the supporting member 8 to which the end portions of the connecting member 9 are respectively connected also changes. The length of the water stop device 5 changes.

本実施形態において、例えば、水圧鉄管2、発電機ユニット3の取水部、外筒19、内筒20の軸方向の中心はすべて同心とするが、これに限定されるものではなく、例えば、水圧鉄管2と外筒19との軸方向の中心が異なってもよい。   In the present embodiment, for example, the axial centers of the hydraulic iron pipe 2, the intake portion of the generator unit 3, the outer cylinder 19, and the inner cylinder 20 are all concentric. However, the present invention is not limited to this. The axial centers of the iron pipe 2 and the outer cylinder 19 may be different.

次に、発電機ユニット3を点検、整備する際の止水装置5の取付方法を取付手順にしたがって説明する。本実施形態においては、水圧鉄管2及び発電機ユニット3の取水部の内径は、例えば、1300mmとする。   Next, the attachment method of the water stop apparatus 5 at the time of checking and maintaining the generator unit 3 will be described according to the attachment procedure. In this embodiment, the internal diameter of the intake part of the hydraulic iron pipe 2 and the generator unit 3 shall be 1300 mm, for example.

まず、水圧鉄管2の取付面と発電機ユニット3の取水部の取付面との距離を計測し、この距離と同じになるように止水装置5の長さを調整する。本実施形態においては、水圧鉄管2の取付面と発電機ユニット3の取水部の取付面との距離は、例えば、680mmとする。止水装置5の長さは、連結部材9の長さを変更することにより調整が可能であり、上述したように、内筒20側の支持部材固定用ナット27を緩め、摺動用ボルト25を回転させることにより調整する。ここで、止水装置5を長くする場合は、摺動用ボルト25を反時計方向に回転させ、止水装置5を短くする場合は、摺動用ボルト25を時計方向に回転させる。止水装置5を所望の長さに調整した後に支持部材固定用ナット27を締め付け、止水装置5の長さを固定する。   First, the distance between the mounting surface of the hydraulic iron pipe 2 and the mounting surface of the water intake portion of the generator unit 3 is measured, and the length of the water stop device 5 is adjusted to be the same as this distance. In the present embodiment, the distance between the mounting surface of the hydraulic iron pipe 2 and the mounting surface of the water intake portion of the generator unit 3 is, for example, 680 mm. The length of the water stop device 5 can be adjusted by changing the length of the connecting member 9. As described above, the support member fixing nut 27 on the inner cylinder 20 side is loosened, and the sliding bolt 25 is attached. Adjust by rotating. Here, when the water stopping device 5 is lengthened, the sliding bolt 25 is rotated counterclockwise, and when the water stopping device 5 is shortened, the sliding bolt 25 is rotated clockwise. After adjusting the water stop device 5 to a desired length, the support member fixing nut 27 is tightened to fix the length of the water stop device 5.

次に、閉鎖部材7の外周部に設けられた吊りボルト28を利用して止水装置5をクレーン等にて吊り上げるとともに、水圧鉄管2と発電機ユニット3との間に移動させる。止水装置取付ボルト29を水圧鉄管2のフランジ10に設けられた貫通孔30に挿通し、内径1300mmの水圧鉄管2を取り付けるために閉鎖部材7に設けられたボルト穴13aに螺合させて、水圧鉄管2と閉鎖部材7とを圧接固定する。   Next, the water stopping device 5 is lifted by a crane or the like using the suspension bolts 28 provided on the outer peripheral portion of the closing member 7 and is moved between the hydraulic iron pipe 2 and the generator unit 3. The water stop device mounting bolt 29 is inserted into the through hole 30 provided in the flange 10 of the hydraulic iron pipe 2 and screwed into the bolt hole 13a provided in the closing member 7 in order to attach the hydraulic iron pipe 2 having an inner diameter of 1300 mm. The hydraulic iron pipe 2 and the closing member 7 are pressed and fixed.

最後に、止水装置取付ボルト29を内径1300mmの発電機ユニット3の取水部を取り付けるために支持部材8に設けられた発電機ユニット取付用挿通孔18aと発電機ユニット3の取水部のフランジ15に設けられた貫通孔31とに挿通し、ナット32に螺合させて、発電機ユニット3の取水部のフランジ15と支持部材8とを圧接固定する。   Finally, in order to attach the water stop device mounting bolt 29 to the intake portion of the generator unit 3 having an inner diameter of 1300 mm, the generator unit mounting insertion hole 18a provided in the support member 8 and the flange 15 of the intake portion of the generator unit 3 are provided. The flange 15 of the water intake portion of the generator unit 3 and the support member 8 are press-fitted and fixed by being inserted into the through-hole 31 provided in the pipe and screwed into the nut 32.

水圧鉄管2と発電機ユニット3との間に取り付けられた止水装置5は、水力発電所の発電機ユニット3を点検、整備する際に発電機ユニット3へ流入する水を止水する。
発電機ユニット3を点検、整備する際は、水圧鉄管2と発電機ユニット3との間に止水装置5を取り付けて発電機ユニット3へ流入する水を止水するとともに、発電機ユニット4へは送水し、発電機ユニット4を稼働させる。
The water stop device 5 attached between the hydraulic iron pipe 2 and the generator unit 3 stops water flowing into the generator unit 3 when the generator unit 3 of the hydroelectric power station is inspected and maintained.
When inspecting and maintaining the generator unit 3, a water stop device 5 is attached between the hydraulic iron pipe 2 and the generator unit 3 to stop water flowing into the generator unit 3 and to the generator unit 4. Sends water and operates the generator unit 4.

次に、上述した発電機ユニット3の点検、整備が終了し、他の発電機ユニット4に止水装置5を用いる場合について説明する。   Next, the case where the inspection and maintenance of the generator unit 3 described above is completed and the water stop device 5 is used for the other generator units 4 will be described.

図3は、本実施形態に係る止水装置5を発電機ユニット4に取り付けた状態を示す平面図である。図3に示すように、発電機ユニット3を点検した後に、発電機ユニット4を点検する場合には、発電機ユニット3に取り付けられている止水装置5を取り外し、発電機ユニット4に取り付けて、発電機ユニット4へ流入する水を止水するとともに、発電機ユニット3へは送水し、発電機ユニット3を稼働させる。   FIG. 3 is a plan view showing a state in which the water stop device 5 according to the present embodiment is attached to the generator unit 4. As shown in FIG. 3, when checking the generator unit 4 after checking the generator unit 3, the water stop device 5 attached to the generator unit 3 is removed and attached to the generator unit 4. The water flowing into the generator unit 4 is stopped and the water is supplied to the generator unit 3 to operate the generator unit 3.

図4は、本実施形態に係る止水装置5を発電機ユニット4の水圧鉄管2と発電機ユニット4との間に取り付けた状態の止水装置5の中心線11より上部のみを示す断面図である。図4に示すように、発電機ユニット4は、水圧鉄管2の取付面と発電機ユニット4の取水部の取付面との距離、水圧鉄管2の径、発電機ユニット4の取水部の径が上述した発電機ユニット3と異なっており、本実施形態においては、例えば、水圧鉄管2の取付面と発電機ユニット4の取水部の取付面との距離は500mm、水圧鉄管2及び発電機ユニット4の取水部の内径は1000mmとする。   FIG. 4 is a cross-sectional view showing only the upper part from the center line 11 of the water stop device 5 in a state where the water stop device 5 according to this embodiment is attached between the hydraulic iron pipe 2 of the generator unit 4 and the generator unit 4. It is. As shown in FIG. 4, the generator unit 4 has a distance between the mounting surface of the hydraulic iron pipe 2 and the mounting surface of the water intake section of the generator unit 4, the diameter of the hydraulic iron pipe 2, and the diameter of the water intake section of the generator unit 4. In this embodiment, for example, the distance between the mounting surface of the hydraulic iron pipe 2 and the mounting surface of the water intake portion of the generator unit 4 is 500 mm, and the hydraulic iron pipe 2 and the generator unit 4 are different from the above-described generator unit 3. The inner diameter of the water intake section is 1000 mm.

発電機ユニット3から取り外した状態では止水装置5の長さは680mmであるために、まず、摺動用ボルト25を時計方向に回転させて止水装置5の長さを短くして500mmとし、支持部材固定用ナット27を締め付け、止水装置5の長さを固定する。   Since the length of the water stop device 5 is 680 mm when removed from the generator unit 3, first, the length of the water stop device 5 is shortened to 500 mm by rotating the sliding bolt 25 clockwise. The support member fixing nut 27 is tightened to fix the length of the water stop device 5.

次に、止水装置5を水圧鉄管2と発電機ユニット4との間に移動させ、止水装置取付ボルト29を水圧鉄管2のフランジ10に設けられた貫通孔30に挿通し、内径1000mmの水圧鉄管2を取り付けるために閉鎖部材7に設けられたボルト穴13bに螺合させて、水圧鉄管2と閉鎖部材7とを圧接固定する。   Next, the water stop device 5 is moved between the hydraulic iron pipe 2 and the generator unit 4, and the water stop device mounting bolt 29 is inserted into the through hole 30 provided in the flange 10 of the hydraulic iron pipe 2, and the inner diameter is 1000 mm. In order to attach the hydraulic iron pipe 2, the hydraulic iron pipe 2 and the closing member 7 are pressed and fixed by screwing into bolt holes 13 b provided in the closing member 7.

最後に、止水装置取付ボルト29を内径1000mmの発電機ユニット4の取水部を取り付けるために支持部材8に設けられた発電機ユニット取付用挿通孔18bと発電機ユニット4の取水部のフランジ15に設けられた貫通孔31とに挿通し、ナット32に螺合させて、発電機ユニット4の取水部のフランジ15と支持部材8とを圧接固定する。
水圧鉄管2と発電機ユニット4との間に取り付けられた止水装置5は、水力発電所の他の発電機ユニットを点検、整備する際に発電機ユニットへ流入する水を止水する。
Finally, the generator unit mounting insertion hole 18b provided in the support member 8 for mounting the water stop device mounting bolt 29 to the water intake portion of the generator unit 4 having an inner diameter of 1000 mm, and the flange 15 of the water intake portion of the generator unit 4 The flange 15 of the water intake portion of the generator unit 4 and the support member 8 are press-fitted and fixed by being inserted into the through-hole 31 provided in the pipe and screwed into the nut 32.
The water stop device 5 attached between the hydraulic iron pipe 2 and the generator unit 4 stops water flowing into the generator unit when other generator units of the hydroelectric power station are inspected and maintained.

上述した止水装置5を用いることにより、水力発電所の発電機ユニット3又は4を点検、整備する際に発電機ユニット3又は4へ流入する水を止水し、点検、整備対象外の発電機ユニット3又は、4の稼働を可能にする。したがって、発電機ユニット3、4の稼働率が向上する。   By using the water stop device 5 described above, water that flows into the generator unit 3 or 4 when the generator unit 3 or 4 of the hydroelectric power station is inspected and maintained is stopped, and power generation that is not subject to inspection or maintenance is maintained. The machine unit 3 or 4 can be operated. Therefore, the operating rate of the generator units 3 and 4 is improved.

また、本発明による止水装置5は、閉鎖部材7、支持部材8はそれぞれ径の異なる水圧鉄管2、発電機ユニット3又は4に取り付け可能で、長さも可変であることから、多種の発電機ユニットに適用することが可能である。したがって、止水装置5を発電機ユニット毎に製作する必要が無くなり、コストを削減することが可能となる。   Further, the water stop device 5 according to the present invention has a closure member 7 and a support member 8 that can be attached to the hydraulic iron pipe 2 and the generator unit 3 or 4 having different diameters, respectively, and the length thereof is variable. It can be applied to units. Therefore, it is not necessary to manufacture the water stop device 5 for each generator unit, and the cost can be reduced.

なお、本実施形態においては、1本の水圧鉄管1から分岐された2本の水圧鉄管2の下流側にそれぞれ発電機ユニット3、4が接続されている場合について説明したが、これに限定されるものではなく、例えば、1本の水圧鉄管1から3本以上分岐した場合や、導水路が1つで水槽部分から複数の水圧鉄管に分岐して、それぞれに発電機ユニットが接続されている場合でも適用可能である。   In addition, although this embodiment demonstrated the case where the generator units 3 and 4 were each connected to the downstream of the two hydraulic iron pipes 2 branched from the one hydraulic iron pipe 1, it is limited to this. For example, when three or more branches from one hydraulic iron pipe 1, or a single water conduit, the water tank portion branches into a plurality of hydraulic iron pipes, and a generator unit is connected to each. Even if applicable.

本発明の第一実施形態に係る止水装置を発電機ユニットに取り付けた状態を示す平面図である。It is a top view which shows the state which attached the water stop apparatus which concerns on 1st embodiment of this invention to the generator unit. 本実施形態に係る止水装置を発電機ユニットの水圧鉄管と発電機ユニットとの間に取り付けた状態の止水装置の中心線より上部のみを示す断面図である。It is sectional drawing which shows only the upper part from the centerline of the water stop apparatus of the state which attached the water stop apparatus which concerns on this embodiment between the hydraulic iron pipe of a generator unit, and a generator unit. 本実施形態に係る止水装置を他方の発電機ユニットに取り付けた状態を示す平面図である。It is a top view which shows the state which attached the water stop apparatus which concerns on this embodiment to the other generator unit. 本実施形態に係る止水装置を他方の発電機ユニットの水圧鉄管と発電機ユニットとの間に取り付けた状態の止水装置の中心線より上部のみを示す断面図である。It is sectional drawing which shows only the upper part from the center line of the water stop apparatus of the state which attached the water stop apparatus which concerns on this embodiment between the hydraulic iron pipe of the other generator unit, and the generator unit.

符号の説明Explanation of symbols

1、2 水圧鉄管 3、4 発電機ユニット
5 止水装置 6 入口弁
7 閉鎖部材 8 支持部材
9 連結部材 10 フランジ
11 中心線 12 ボルト
13a、13b ボルト穴 14 シール材
15 フランジ 18a、18b、18c 入口弁取付用挿通孔
19 外筒 20 内筒
21 摺動機構 22 内筒調整用挿通孔
23a、23b フランジ 24a、24b 挿通孔
25 摺動用ボルト 26a、26b 内筒固定用ナット
27 支持部材固定用ナット 28 吊りボルト
29 止水装置取付ボルト 30、31 貫通孔
32 ナット 34 ロック機構
DESCRIPTION OF SYMBOLS 1, 2 Hydraulic iron pipe 3, 4 Generator unit 5 Water stop apparatus 6 Inlet valve 7 Closure member 8 Support member 9 Connecting member 10 Flange 11 Centerline 12 Bolt 13a, 13b Bolt hole 14 Sealing material 15 Flange 18a, 18b, 18c Inlet Valve mounting insertion hole 19 Outer cylinder 20 Inner cylinder 21 Sliding mechanism 22 Inner cylinder adjusting insertion holes 23a, 23b Flange 24a, 24b Insertion hole 25 Sliding bolts 26a, 26b Inner cylinder fixing nut 27 Support member fixing nut 28 Suspension bolt 29 Water stop device mounting bolt 30, 31 Through hole 32 Nut 34 Lock mechanism

Claims (4)

複数の発電機ユニットを備え、各発電機ユニットの取水部に入口弁が設けられた水力発電所における発電機ユニットを点検する際に用いられ、発電機ユニットへ流入する水を止水するための止水装置であって、
前記発電機ユニットへ水を送水する水圧鉄管に脱着可能に取り付けられ、水の流れを停止するための閉鎖部材と、
前記発電機ユニットに脱着可能に取り付けられる支持部材と、
前記閉鎖部材と前記支持部材とを連結する連結部材とを備え
前記連結部材は、
円筒形状を有し、一端が前記支持部材に接続される外筒と、
円筒形状を有し、一端は前記閉鎖部材に接続され、他端は前記外筒内に摺動可能に挿通される内筒と、
前記内筒を前記外筒に対して摺動させるための摺動機構と、
該摺動機構の摺動を制止するためのロック機構とを備え、前記連結部材の軸方向の長さは前記摺動機構を調整することにより可変である
ことを特徴とする止水装置。
Used to check the generator unit in a hydroelectric power plant that has a plurality of generator units and has an inlet valve in the intake section of each generator unit, to stop water flowing into the generator unit A water stop device,
A closing member for detachably attaching to a hydraulic iron pipe for supplying water to the generator unit, and for stopping the flow of water;
A support member detachably attached to the generator unit;
A connecting member for connecting the closing member and the support member ;
The connecting member is
An outer cylinder having a cylindrical shape and having one end connected to the support member;
An inner cylinder having a cylindrical shape, one end connected to the closing member and the other end slidably inserted into the outer cylinder;
A sliding mechanism for sliding the inner cylinder relative to the outer cylinder;
And a locking mechanism for restraining the sliding of the sliding mechanism, wherein the axial length of the connecting member is variable by adjusting the sliding mechanism .
前記閉鎖部材は、前記水圧鉄管と同心で、かつ径の異なる複数の円周上にボルト穴を有することを特徴とする請求項1に記載の止水装置。   The water stop device according to claim 1, wherein the closing member has bolt holes on a plurality of circumferences that are concentric with the hydraulic iron pipe and have different diameters. 前記支持部材は、前記発電機ユニットの前記取水部と同心で、かつ径の異なる複数の円周上にボルト挿通孔を有することを特徴とする請求項1に記載の止水装置。 The water stop device according to claim 1, wherein the support member has bolt insertion holes on a plurality of circumferences that are concentric with the water intake portion of the generator unit and have different diameters. 複数の発電機ユニットを備え、各発電機ユニットの取水部に入口弁が設けられた水力発電所における発電機ユニットの点検を、止水装置を用いて行う方法において、
前記止水装置は、
前記発電機ユニットへ水を送水する水圧鉄管に脱着可能に取り付けられ、水の流れを停止するための閉鎖部材と、
前記発電機ユニットに脱着可能に取り付けられる支持部材と、
前記閉鎖部材と前記支持部材とを連結する連結部材とを備え、
前記連結部材は、
円筒形状を有し、一端が前記支持部材に接続される外筒と、
円筒形状を有し、一端は前記閉鎖部材に接続され、他端は前記外筒内に摺動可能に挿通される内筒と、
前記内筒を前記外筒に対して摺動させるための摺動機構と、
該摺動機構の摺動を制止するためのロック機構とを備え、前記連結部材の軸方向の長さは前記摺動機構を調整することにより可変であり、
前記止水装置の長さが、点検対象の発電機ユニットへ水を送水する水圧鉄管の取付面と、前記点検対象の発電ユニットの取付面との距離と同じとなるように、前記連結部材の軸方向の長さを調整し、
前記点検対象の発電機ユニットへ水を送水する水圧鉄管に前記閉塞部材を取り付けると共に前記支持部材を前記点検対象の発電機ユニットに取り付けて、該発電機ユニットへの水の流れを停止し、
点検対象外の発電機ユニットへは送水を継続し、
前記点検対象の発電機ユニットを点検するとともに、点検対象外の発電機ユニットは発電を継続することを特徴とする発電ユニットの点検方法。
In a method for inspecting a generator unit in a hydroelectric power plant provided with a plurality of generator units and provided with an inlet valve in a water intake section of each generator unit using a water stop device
The water stop device is
A closing member for detachably attaching to a hydraulic iron pipe for supplying water to the generator unit, and for stopping the flow of water;
A support member detachably attached to the generator unit;
A connecting member for connecting the closing member and the support member;
The connecting member is
An outer cylinder having a cylindrical shape and having one end connected to the support member;
An inner cylinder having a cylindrical shape, one end connected to the closing member and the other end slidably inserted into the outer cylinder;
A sliding mechanism for sliding the inner cylinder relative to the outer cylinder;
A locking mechanism for restraining the sliding of the sliding mechanism, and the axial length of the connecting member is variable by adjusting the sliding mechanism,
The length of the water stop device is the same as the distance between the mounting surface of the hydraulic iron pipe that supplies water to the generator unit to be inspected and the mounting surface of the power generation unit to be inspected. Adjust the axial length,
Attaching the closing member to a hydraulic iron pipe that supplies water to the generator unit to be inspected and attaching the support member to the generator unit to be inspected to stop the flow of water to the generator unit ,
Continue water supply to generator units that are not subject to inspection,
A method of checking a power generation unit, wherein the generator unit to be inspected is inspected, and the generator unit not to be inspected continues power generation.
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