JP4901224B2 - Water stop device for suction pipe - Google Patents

Water stop device for suction pipe Download PDF

Info

Publication number
JP4901224B2
JP4901224B2 JP2006015253A JP2006015253A JP4901224B2 JP 4901224 B2 JP4901224 B2 JP 4901224B2 JP 2006015253 A JP2006015253 A JP 2006015253A JP 2006015253 A JP2006015253 A JP 2006015253A JP 4901224 B2 JP4901224 B2 JP 4901224B2
Authority
JP
Japan
Prior art keywords
suction pipe
water stop
water
partition
stop device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2006015253A
Other languages
Japanese (ja)
Other versions
JP2007198174A (en
Inventor
俊治 山下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chugoku Electric Power Co Inc
Original Assignee
Chugoku Electric Power Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chugoku Electric Power Co Inc filed Critical Chugoku Electric Power Co Inc
Priority to JP2006015253A priority Critical patent/JP4901224B2/en
Publication of JP2007198174A publication Critical patent/JP2007198174A/en
Application granted granted Critical
Publication of JP4901224B2 publication Critical patent/JP4901224B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
    • E02B9/02—Water-ways
    • E02B9/06—Pressure galleries or pressure conduits; Galleries specially adapted to house pressure conduits; Means specially adapted for use therewith, e.g. housings, valves, gates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Hydraulic Turbines (AREA)

Description

本発明は、水力発電所などにおいて水車・発電設備の内部を点検、整備等する際に、吸出管（ドラフト管）を止水するための止水装置に関する。   The present invention relates to a water stop device for stopping a suction pipe (draft pipe) when inspecting and maintaining the inside of a turbine or power generation facility in a hydroelectric power plant or the like.

水力発電所などにおいては、水車からの吸出水を放水路に導くための吸出管（ドラフト管）が設置されている。この吸出管を介して下流側（放水路側）から水車側に水が流入（逆流）する場合があるため、水車の内部などを点検、整備等する際には、吸出管を止水する必要がある。この止水方法として、従来、吸出管内に鉄板を溶接していたが、繰り返し溶接を行うことによって吸出管の母材に熱影響を与えるとともに、狭い吸出管内で溶接作業を行うため作業性が悪く、溶接品質も不安定であった。このため、溶接によらずに、吸出管を止水する止水装置が知られている（例えば、特許文献１参照。）。   In hydroelectric power plants and the like, suction pipes (draft pipes) are installed to guide the sucked water from the water turbines to the discharge channel. Since water may flow (reverse flow) from the downstream side (water discharge channel side) to the water turbine side via this suction pipe, it is necessary to stop the suction pipe when inspecting and maintaining the inside of the water turbine. is there. Conventionally, an iron plate was welded in the suction pipe as a water stop method. However, repeated welding has a thermal effect on the base material of the suction pipe, and the workability is poor because the welding work is performed in the narrow suction pipe. The welding quality was also unstable. For this reason, the water stop apparatus which stops a suction pipe not depending on welding is known (for example, refer patent document 1).

この止水装置は、吸出管内に固定される梁部材と、この梁部材に固定されて吸出管の内部を上下に仕切る踏板と、この踏板と吸出管の内周面との間を水密に封止するシール部とを備えている。また、シール部は、複数の押圧部材と押圧機構とを備え、押圧部材と吸出管の内周面との間にシール材が配設され、押圧機構によって押圧部材を吸出管の内周面側に押圧することで、シール材が押圧されて踏板と吸出管の内周面との間が封止される構造となっている。一方、吸出管の内壁には、梁部材を固定するために凹状のビーム支持部を形成する必要がある。そして、このような止水装置を吸出管内に設置するには、複数に分割された梁部材を吸出管内に搬入し、ビーム支持部に梁部材を固定しながら、各梁部材をそれぞれ接続する。次に、複数に分割された踏板を吸出管内に搬入して、各踏板を梁部材に固定し、複数の押圧部材を踏板に取り付ける。さらに、押圧部材と吸出管の内周面との間にシール材を配設し、各押圧機構によってそれぞれの押圧部材を吸出管の内周面側に押圧するものである。
特開２０００−２３０４７２号公報 This water stop device seals the space between the beam member fixed in the suction pipe, the tread board fixed to the beam member and dividing the inside of the suction pipe up and down, and the inner peripheral surface of the suction pipe and the suction pipe. And a sealing portion to be stopped. Further, the seal portion includes a plurality of pressing members and a pressing mechanism, and a sealing material is disposed between the pressing member and the inner peripheral surface of the suction pipe, and the pressing member is disposed on the inner peripheral surface side of the suction pipe by the pressing mechanism. By being pressed, the sealing material is pressed and the space between the tread board and the inner peripheral surface of the suction pipe is sealed. On the other hand, it is necessary to form a concave beam support portion on the inner wall of the suction pipe in order to fix the beam member. And in order to install such a water stop apparatus in a suction pipe, the beam member divided | segmented into several is carried in in a suction pipe, and each beam member is each connected, fixing a beam member to a beam support part. Next, the divided treads are carried into the suction pipe, each tread is fixed to the beam member, and the plurality of pressing members are attached to the tread. Furthermore, a sealing material is disposed between the pressing member and the inner peripheral surface of the suction pipe, and each pressing member is pressed against the inner peripheral surface side of the suction pipe by each pressing mechanism.
JP 2000-230472 A

ところで、上記特許文献１に記載されているような止水装置では、構成要素が多く、構造が複雑であるばかりでなく、設置に多くの時間と労力とを要する。すなわち、止水装置を設置するには、梁部材や押圧部材などの多くの部材を吸出管内に搬入してこれらを組み付けなければならず、しかも狭い吸出管内での設置作業であるため作業性が悪く、設置に多くの時間と労力とを要する。さらに、吸出管の内壁にビーム支持部を要するため、既存の吸出管そのものを加工（工事）する必要がある。また、複数の押圧機構および押圧部材によってシール材を吸出管の内周面に押圧するため、各押圧機構による押圧力が均一でないと、シール材によるシール性（水密性）も均一性となる。しかし、各押圧機構による押圧力を均一にすることは困難であり、止水装置のシール性に不安定要因を有することになる。   By the way, in the water stop apparatus as described in the said patent document 1, not only many components and a structure are complicated, but much time and labor are required for installation. That is, in order to install the water stop device, many members such as a beam member and a pressing member must be carried into the suction pipe and assembled, and the workability is improved because it is an installation work in a narrow suction pipe. Unfortunately, it takes a lot of time and effort to install. Furthermore, since a beam support portion is required on the inner wall of the suction pipe, it is necessary to process (construct) the existing suction pipe itself. Further, since the sealing material is pressed against the inner peripheral surface of the suction pipe by a plurality of pressing mechanisms and pressing members, if the pressing force by each pressing mechanism is not uniform, the sealing performance (water tightness) by the sealing material is also uniform. However, it is difficult to make the pressing force by each pressing mechanism uniform, and there is an unstable factor in the sealing performance of the water stop device.

そこで本発明は、簡単な構成（構造）で設置が容易であり、かつ、安定したシール性を有する吸出管用止水装置を提供することを目的とする。   Accordingly, an object of the present invention is to provide a water stop device for a suction pipe that is easy to install with a simple configuration (structure) and has a stable sealing property.

上記目的を達成するために請求項１に記載の発明は、水車からの吸出水を放水路に導くための吸出管の内部に設置され、前記吸出管を止水するための吸出管用止水装置であって、板状で、前記吸出管内に設置されている作業足場の前記放水路側の面に当接するように配設されて、前記吸出管内を前記水車側と前記放水路側とに仕切る仕切部と、気体を入れると膨らんで前記仕切部と前記吸出管の内周面との間を密閉し、前記吸出管の内周面を押圧して前記仕切部を前記吸出管内に保持するシール部と、を備え、前記シール部が環状で、この環内を塞ぐように前記シール部の前記作業足場側の面に前記仕切部が接合され、前記仕切部が一体として折り畳み可能で、展開した際に折り目を密閉するシール材が設けられている、ことを特徴としている。
（作用）
仕切部によって吸出管内が仕切られ、シール部内に気体を入れることで仕切部と吸出管の内周面との間が密閉される。と同時に、シール部が吸出管の内周面を押圧し、シール部によって仕切部が吸出管内に保持されて、仕切部とシール部とによって吸出管が止水される。また、吸出管用止水装置を吸出管内に設置する場合には仕切部を伸ばし（展開し）、吸出管用止水装置を使用しない場合には仕切部を折り畳む。
In order to achieve the above-mentioned object, the invention according to claim 1 is provided inside a suction pipe for guiding the sucked water from the water turbine to the water discharge channel, and is a water stop device for the suction pipe for stopping the suction pipe. A partition portion that is plate-shaped and is disposed so as to abut on the surface on the side of the water discharge channel of a work scaffold installed in the suction tube, and partitions the inside of the water discharge tube into the water wheel side and the water discharge channel side. And a seal portion that swells when gas is introduced and seals between the partition portion and the inner peripheral surface of the suction pipe, presses the inner peripheral surface of the suction pipe, and holds the partition portion in the suction pipe; , Bei give a, in the sealing portion is annular, said the surface of the work scaffolding side of the seal portion so as to block the inside the ring partition portion is joined, the partition portion is foldable as an integral, when deployed sealing material for sealing the folds are provided, it is characterized by .
(Function)
The inside of the suction pipe is partitioned by the partition part, and the space between the partition part and the inner peripheral surface of the suction pipe is sealed by putting gas into the seal part. At the same time, the seal part presses the inner peripheral surface of the suction pipe, the partition part is held in the suction pipe by the seal part, and the suction pipe is stopped by the partition part and the seal part. Moreover, when installing the water stop apparatus for suction pipes in a suction pipe, a partition part is extended (expanded), and when not using the water stop apparatus for suction pipes, a partition part is folded.

請求項１に記載の発明によれば、吸出管用止水装置が仕切部とシール部とによる簡単な構成であり、シール部内に気体を入れることで、仕切部とシール部とによって吸出管が止水される。しかも、シール部内に気体を入れるだけで、仕切部が吸出管内に保持されるため、すなわち吸出管用止水装置が吸出管内に設置されるため、吸出管用止水装置の設置が極めて容易となる。また、気体を入れるとシール部が膨らんで仕切部と吸出管の内周面との間が密閉（シール）されるため、すなわち気体の圧力（静水圧）によって密閉されるため、仕切部と吸出管の内周面との間を均一かつ安定して密閉することができる。   According to the first aspect of the present invention, the water stop device for the suction pipe has a simple configuration including the partition part and the seal part, and the suction pipe is stopped by the partition part and the seal part by introducing gas into the seal part. Watered. In addition, since the partition portion is held in the suction pipe simply by putting gas into the seal portion, that is, the suction pipe water stop device is installed in the suction pipe, the installation of the suction pipe water stop device becomes extremely easy. In addition, when gas is introduced, the seal portion expands and the space between the partition portion and the inner peripheral surface of the suction pipe is sealed (sealed), that is, sealed by the gas pressure (hydrostatic pressure). The space between the inner peripheral surface of the tube can be uniformly and stably sealed.

また、シール部の環内を塞ぐようにシール部の作業足場側の面に仕切部が接合されているため、仕切部を足場板として利用することができ、水車の内部などの点検、整備等を容易かつ安全に行うことができる。
 In addition, since the partition part is joined to the surface of the work part side of the seal part so as to block the ring of the seal part , the partition part can be used as a scaffold plate, and the inspection and maintenance of the inside of the water turbine, etc. Can be carried out easily and safely.

一方、吸出管用止水装置を使用しない場合には、シール部内から気体を抜いて仕切部を折り畳むことで、吸出管用止水装置をコンパクトな状態で搬送したり、保管場所に保管したりすることができる。また、吸出管用止水装置を吸出管内に設置する場合には、仕切部を展開すればよい。しかも、折り目を密閉するシール材が設けられているため、仕切部を広げた状態で折り目がシール材によって密閉され、止水される。
On the other hand, when not using the water stop device for the suction pipe, remove the gas from the seal part and fold the partition to transport the water stop device for the suction pipe in a compact state or store it in the storage location. Can do. Moreover, what is necessary is just to expand | deploy a partition part, when installing the water stop apparatus for suction pipes in a suction pipe. And since the sealing material which seals a crease is provided, a crease is sealed with a sealing material in the state which extended the partition part, and water stop.

また、作業足場の放水路側の面に当接するように仕切部つまり吸出管用止水装置が設置されるため、放水路側（下流側）から水が流入（逆流）した場合に、吸出管用止水装置にかかる水圧が作業足場に伝わり、作業足場によって吸出管用止水装置が支持される（シール部による仕切部の保持が支持される）。このため、吸出管用止水装置による止水が良好に維持される。 In addition, since the partition, that is, the water stop device for the suction pipe is installed so as to abut the surface of the work scaffold on the side of the water discharge channel, the water stop device for the suction pipe when water flows in (reverse flow) from the water discharge channel side (downstream) The water pressure applied to the work scaffold is transmitted to the work scaffold, and the water stop device for the suction pipe is supported by the work scaffold (holding of the partition portion by the seal portion is supported). For this reason, the water stop by the water stop apparatus for suction pipes is maintained favorably.

以下、本発明を図示の実施形態に基づいて説明する。   Hereinafter, the present invention will be described based on the illustrated embodiments.

図１は、本発明の実施形態に係わる吸出管用止水装置１を示す正面図（ａ）と平面図（ｂ）である。この吸出管用止水装置１は、主として、環状チューブ２（シール部）と仕切板３（仕切部）とから構成されている。   FIG. 1 is a front view (a) and a plan view (b) showing a water stop device 1 for a suction pipe according to an embodiment of the present invention. The suction pipe water stop device 1 is mainly composed of an annular tube 2 (seal part) and a partition plate 3 (partition part).

環状チューブ２は、自動車タイヤのチューブ（インナーチューブ）と同様に、ゴム製で円環状に形成され、空気を流入出するためのバルブ２１が取り付けられている。そして、バルブ２１から空気（気体）を入れると膨らんで断面が円形の管（チューブ）がドーナツ状になり、バルブ２１から空気を流出させると縮んで平たくなるようになっている。また、環状チューブ２の膨らんだ状態での外径は、後述する吸出管Ｄの内径よりも大きく設定されている。すなわち、後述のように環状チューブ２が一定の高圧で膨らんだ際に、環状チューブ２が吸出管Ｄの全内周面に接触して仕切板３と吸出管Ｄの内周面との間が密閉（水密にシール）されるとともに、環状チューブ２が吸出管Ｄの内周面を押圧して仕切板３が吸出管Ｄ内に保持されるように、環状チューブ２の膨らんだ状態での外径が設定されている。   Like the tube (inner tube) of an automobile tire, the annular tube 2 is made of rubber and is formed in an annular shape, and a valve 21 for flowing in and out of air is attached to the annular tube 2. Then, when air (gas) is introduced from the valve 21, the tube (tube) having a circular cross section is formed into a donut shape, and when air is discharged from the valve 21, the tube 21 is compressed and flattened. Further, the outer diameter of the annular tube 2 in the swollen state is set larger than the inner diameter of the suction pipe D described later. That is, as will be described later, when the annular tube 2 swells at a constant high pressure, the annular tube 2 comes into contact with the entire inner peripheral surface of the suction pipe D and the space between the partition plate 3 and the inner peripheral surface of the suction pipe D is The annular tube 2 is swelled so that the annular tube 2 is pressed against the inner peripheral surface of the suction pipe D and the partition plate 3 is held in the suction pipe D. The diameter is set.

仕切板３は、板状で樹脂製の第１仕切板３１と第２仕切板３２とを備えている。第１仕切板３１と第２仕切板３２とはともに半円形で、それぞれの直線部同士が蝶番３３（ヒンジ）によって接続されている。また、第１仕切板３１の直線縁端にシール材３４（パッキン）が接着され、第１仕切板３１と第２仕切板３２とを広げて（展開して）一平面状にした状態で円形の仕切板３が形成され、かつ、第１仕切板３１と第２仕切板３２との間がシール材３４によって密閉（水密にシール）されるようになっている。このような仕切板３の外径は、環状チューブ２が膨らんだ状態での外径よりも小さく、環状チューブ２が膨らんだ状態での内径よりも大きく設定されている。そして、環状チューブ２の環内を塞ぐように仕切板３の下面３ａ（蝶番３３と反対側の面）と環状チューブ２の上面２ａとが接合されて、吸出管用止水装置１が構成されている。   The partition plate 3 includes a first partition plate 31 and a second partition plate 32 that are plate-shaped and made of resin. The first partition plate 31 and the second partition plate 32 are both semicircular, and their straight portions are connected to each other by a hinge 33 (hinge). In addition, a sealing material 34 (packing) is bonded to the linear edge of the first partition plate 31, and the first partition plate 31 and the second partition plate 32 are expanded (deployed) to form a flat surface. The partition plate 3 is formed, and the space between the first partition plate 31 and the second partition plate 32 is hermetically sealed (sealed tightly) by the sealing material 34. The outer diameter of the partition plate 3 is set to be smaller than the outer diameter when the annular tube 2 is expanded, and larger than the inner diameter when the annular tube 2 is expanded. And the lower surface 3a (surface on the opposite side to the hinge 33) of the partition plate 3 and the upper surface 2a of the annular tube 2 are joined so as to block the ring of the annular tube 2, and the water stop device 1 for the suction pipe is configured. Yes.

このような吸出管用止水装置１の環状チューブ２に空気を入れると、上記のように環状チューブ２がドーナツ状に膨らむとともに、その膨らみに伴って第１仕切板３１と第２仕切板３２とが開いて円形の仕切板３が形成されるようになっている。そして、後述のようにして吸出管用止水装置１を吸出管Ｄ内に設置すると、仕切板３によって吸出管Ｄ内がフランシス水車Ｔ側と放水路Ｒ側とに仕切られる。一方、環状チューブ２から空気を抜くと、上記のように環状チューブ２が縮んで平たくなり、蝶番３３を介して第１仕切板３１と第２仕切板３２とを折り畳むことができるものである。   When air is introduced into the annular tube 2 of the suction pipe water stop device 1, the annular tube 2 swells in a donut shape as described above, and the first partition plate 31 and the second partition plate 32 are associated with the swelling. Is opened so that a circular partition plate 3 is formed. When the suction pipe water stop device 1 is installed in the suction pipe D as described later, the partition pipe 3 partitions the suction pipe D into the Francis turbine T side and the discharge channel R side. On the other hand, when air is extracted from the annular tube 2, the annular tube 2 is contracted and flattened as described above, and the first partition plate 31 and the second partition plate 32 can be folded via the hinge 33.

次に、このような構成の吸出管用止水装置１の設置方法などについて、図２から図４に基づいて説明する。図中Ｔはフランシス水車（水車）で、このフランシス水車Ｔの出力軸Ｔ１に発電機（図示せず）が連結されている。フランシス水車ＴのケーシングＴ２には取水管Ｓが接続され、フランシス水車Ｔの吸出口Ｔ３には吸出管Ｄが接続されている。そして、取水口（図示せず）からの水が取水管Ｓを介してフランシス水車Ｔに供給されてフランシス水車Ｔが回転し、フランシス水車Ｔからの吸出水が吸出管Ｄを介して放水路Ｒに導かれるようになっている。   Next, the installation method of the suction pipe water stop device 1 having such a configuration will be described with reference to FIGS. In the figure, T is a Francis turbine (turbine), and a generator (not shown) is connected to the output shaft T1 of the Francis turbine T. The intake pipe S is connected to the casing T2 of the Francis turbine T, and the suction pipe D is connected to the suction outlet T3 of the Francis turbine T. Then, water from a water intake (not shown) is supplied to the Francis turbine T via the intake pipe S, the Francis turbine T rotates, and the suction water from the Francis turbine T is discharged into the discharge channel R via the suction pipe D. To be guided to.

吸出管Ｄの上端部側（フランシス水車Ｔ側）には、作業者などが出入りするためのマンホールＤ１が設けられ、このマンホールＤ１の下方に位置する吸出管Ｄ内に２本の作業足場Ｄ２が設置されている。すなわち、吸出管Ｄの内壁に凹状の足場支持部Ｄ３が互いに対向して２対形成され、この足場支持部Ｄ３に作業足場Ｄ２の両端部が支持された状態で設置されている。なお、このような構成の吸出管Ｄは、従来からある既存の吸出管と同等の構成であり、吸出管用止水装置１を設置するために、別途加工や設置を施したものではない。   A manhole D1 is provided on the upper end side (the Francis turbine T side) of the suction pipe D so that workers and the like can enter and exit. Two work scaffolds D2 are provided in the suction pipe D located below the manhole D1. is set up. That is, two pairs of concave scaffolding support portions D3 are formed on the inner wall of the suction pipe D so as to face each other, and the scaffold support portions D3 are installed in a state where both ends of the work scaffolding D2 are supported. In addition, the suction pipe D of such a structure is a structure equivalent to the existing existing suction pipe, and in order to install the water stop apparatus 1 for suction pipes, it is not what was processed and installed separately.

このような吸出管Ｄ内に吸出管用止水装置１を設置するには、まず、上記のようにして環状チューブ２から空気を抜いた状態で第１仕切板３１と第２仕切板３２とを折り畳み、吸出管用止水装置１をマンホールＤ１から吸出管Ｄ内に搬入する。次に、吸出管用止水装置１を作業足場Ｄ２の下方（放水路Ｒ側）に位置させて、第１仕切板３１と第２仕切板３２とを広げて、仕切板３を作業足場Ｄ２の下面（放水路Ｒ側の面）に当接させる。この際、作業者は作業足場Ｄ２の上に乗って作業を行うことができる。そして、この状態で、バルブ２１から環状チューブ２内に空気（圧縮空気）を入れて、環状チューブ２を膨らませるとともに、環状チューブ２内を一定の高圧にする。すなわち、環状チューブ２によって仕切板３と吸出管Ｄの内周面との間が強く密閉されて放水路Ｒ側（下流側）からの水がフランシス水車Ｔ側に流入（逆流）せず、かつ、環状チューブ２が吸出管Ｄの内周面を押圧して仕切板３が吸出管Ｄ内に強固に保持されるような高圧に、環状チューブ２内を加圧する。なお、このような高圧に耐えられるように、環状チューブ２の素材（ゴム）の材質、厚みなどが選択、設定されている。これにより、環状チューブ２によって仕切板３と吸出管Ｄの内周面との間が密閉され、かつ、仕切板３が吸出管Ｄ内に保持された状態で、作業足場Ｄ２の下面に当接するように吸出管用止水装置１が設置される。   In order to install the water stop device 1 for the suction pipe in the suction pipe D, first, the first partition plate 31 and the second partition plate 32 are placed in a state where the air is removed from the annular tube 2 as described above. Folding and carrying out the suction pipe water stop device 1 into the suction pipe D from the manhole D1. Next, the water stop device 1 for the suction pipe is positioned below the work platform D2 (on the water discharge path R side), the first partition plate 31 and the second partition plate 32 are spread, and the partition plate 3 is attached to the work platform D2. It is made to contact the lower surface (surface on the side of the water discharge channel R). At this time, the worker can work on the work scaffold D2. In this state, air (compressed air) is introduced from the valve 21 into the annular tube 2 to inflate the annular tube 2 and make the inside of the annular tube 2 have a constant high pressure. That is, the space between the partition plate 3 and the inner peripheral surface of the suction pipe D is tightly sealed by the annular tube 2 so that water from the discharge channel R side (downstream side) does not flow (backflow) into the Francis turbine T side, and The inside of the annular tube 2 is pressurized to such a high pressure that the annular tube 2 presses the inner peripheral surface of the suction pipe D and the partition plate 3 is firmly held in the suction pipe D. It should be noted that the material, thickness, and the like of the material (rubber) of the annular tube 2 are selected and set so as to withstand such a high pressure. As a result, the space between the partition plate 3 and the inner peripheral surface of the suction pipe D is sealed by the annular tube 2, and the lower surface of the work scaffold D2 is brought into contact with the partition plate 3 held in the suction pipe D. In this way, the suction pipe water stop device 1 is installed.

このようにして吸出管用止水装置１を設置した状態では、仕切板３によって吸出管Ｄ内が仕切られ、仕切板３と吸出管Ｄの内周面との間が環状チューブ２によって密閉されるため、放水路Ｒ側からの水がフランシス水車Ｔ側に流入することが止水（防止）される。このため、作業者は吸出管用止水装置１よりもフランシス水車Ｔ側に位置した状態で、水の流入を気にすることなく、フランシス水車Ｔの内部などを点検、整備等することができる。一方、フランシス水車Ｔの点検、整備等が終了した場合には、環状チューブ２から空気を抜き取り、環状チューブ２を縮めて平たくした状態で、第１仕切板３１と第２仕切板３２とを折り畳む。そして、吸出管用止水装置１をマンホールＤ１から吸出管Ｄ外に搬出すればよい。   In the state where the suction pipe water stop device 1 is installed in this manner, the inside of the suction pipe D is partitioned by the partition plate 3, and the space between the partition plate 3 and the inner peripheral surface of the suction pipe D is sealed by the annular tube 2. Therefore, the water from the discharge channel R side is stopped (prevented) from flowing into the Francis turbine T side. For this reason, the worker can inspect and maintain the inside of the Francis turbine T and the like without being concerned about the inflow of water in a state of being located closer to the Francis turbine T than the suction pipe water stop device 1. On the other hand, when the inspection, maintenance, etc. of the Francis turbine T are completed, the first partition plate 31 and the second partition plate 32 are folded in a state where the air is extracted from the annular tube 2 and the annular tube 2 is contracted and flattened. . And what is necessary is just to carry out the water stop apparatus 1 for suction pipes out of the suction pipe D from the manhole D1.

このような構成の吸出管用止水装置１によれば、主として環状チューブ２と仕切板３とによる簡単な構成（構造）であり、環状チューブ２内に空気を入れることで、環状チューブ２と仕切板３とによって吸出管Ｄが止水される。しかも、環状チューブ２内に空気を入れるだけで、仕切板３が吸出管Ｄ内に保持されるため、すなわち吸出管用止水装置１が吸出管Ｄ内に設置されるため、吸出管用止水装置１の設置が極めて容易となる。また、空気を入れると環状チューブ２が膨らんで仕切板３と吸出管Ｄの内周面との間が密閉されるため、すなわち空気の圧力（静水圧）によって密閉されるため、仕切板３と吸出管Ｄの内周面との間を均一かつ安定して密閉することができる。   According to the water shutoff device 1 for the suction pipe having such a configuration, it has a simple configuration (structure) mainly composed of the annular tube 2 and the partition plate 3. By putting air into the annular tube 2, the annular tube 2 and the partition are separated. The suction pipe D is stopped by the plate 3. Moreover, since the partition plate 3 is held in the suction pipe D simply by introducing air into the annular tube 2, that is, the suction pipe water stop device 1 is installed in the suction pipe D. 1 is very easy to install. Moreover, since the annular tube 2 expands when air is introduced and the space between the partition plate 3 and the inner peripheral surface of the suction pipe D is sealed, that is, sealed by the air pressure (hydrostatic pressure), the partition plate 3 and The space between the suction pipe D and the inner peripheral surface can be uniformly and stably sealed.

さらに、仕切板３が板状で、環状チューブ２の環内を塞ぐように環状チューブ２の上面２ａに配設されているため、作業者は仕切板３を足場板として利用することができ、フランシス水車Ｔの内部などの点検、整備等を容易かつ安全に行うことができる。一方、吸出管用止水装置１を使用しない場合には、環状チューブ２内から空気を抜いて第１仕切板３１と第２仕切板３２とを折り畳むことができる。このため、吸出管用止水装置１をコンパクトな状態で搬送（搬出入）したり、保管場所に保管したりすることができる。   Furthermore, since the partition plate 3 is plate-shaped and is disposed on the upper surface 2a of the annular tube 2 so as to close the ring of the annular tube 2, the operator can use the partition plate 3 as a scaffold plate, Inspection, maintenance, etc. of the interior of the Francis turbine T can be performed easily and safely. On the other hand, when the water stop device 1 for the suction pipe is not used, the first partition plate 31 and the second partition plate 32 can be folded by removing the air from the annular tube 2. For this reason, the water stop apparatus 1 for suction pipes can be conveyed (carrying in / out) in a compact state or stored in a storage location.

また、本実施形態では、上記のように、作業足場Ｄ２の下面に当接するように吸出管用止水装置１を設置しているため、放水路Ｒ側から水が流入した場合に、吸出管用止水装置１にかかる水圧が作業足場Ｄ２に伝わり、作業足場Ｄ２によって吸出管用止水装置１が強固に支持される。つまり、環状チューブ２による仕切板３の保持が強固に支持される。このため、吸出管用止水装置１による止水が良好に維持される。さらに、環状チューブ２への空気の入出だけで、吸出管用止水装置１を設置、取り外すことができ、吸出管用止水装置１を繰り返して使用することができる。   Moreover, in this embodiment, since the suction pipe water stop device 1 is installed so as to contact the lower surface of the work scaffold D2 as described above, when water flows from the discharge channel R side, the suction pipe stop is stopped. The water pressure applied to the water device 1 is transmitted to the work scaffold D2, and the suction pipe water stop device 1 is firmly supported by the work scaffold D2. That is, the holding of the partition plate 3 by the annular tube 2 is firmly supported. For this reason, the water stop by the water stop apparatus 1 for suction pipes is maintained favorably. Furthermore, the suction pipe water-stop device 1 can be installed and removed only by entering and exiting the annular tube 2, and the suction pipe water-stop device 1 can be used repeatedly.

以上、この発明の実施形態について説明したが、具体的な構成は、本実施形態に限られるものではなく、この発明の要旨を逸脱しない範囲の設計の変更等があっても、この発明に含まれる。例えば、本実施形態では、仕切板３を２つの仕切板３１、３２に分割しているが、さらに多くの仕切板に分割して吸出管用止水装置をさらにコンパクトに折り畳めるようにしてもよい。また、仕切板３を分割せずに１枚の板から構成して仕切板３の強度や密閉性を高めるようにしてもよい。さらに、２つの仕切板３１、３２を接続板などで固定し、仕切板３の強度を高めるようにしてもよく、設置作業性などを向上させるために、２つの仕切板３１、３２を広げた状態で仮止めするフックや、取手などを設けてもよい。さらには、吸出管用止水装置１を設置する際に、仕切板３を作業足場Ｄ２に固定するようにしてもよい。   Although the embodiment of the present invention has been described above, the specific configuration is not limited to the present embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included in the present invention. It is. For example, in this embodiment, the partition plate 3 is divided into the two partition plates 31 and 32. However, the suction pipe water stop device may be folded more compactly by dividing the partition plate 3 into more partition plates. Further, the partition plate 3 may be constituted by a single plate without being divided so as to enhance the strength and sealing performance of the partition plate 3. Furthermore, the two partition plates 31 and 32 may be fixed with a connection plate or the like to increase the strength of the partition plate 3, and the two partition plates 31 and 32 are expanded in order to improve installation workability and the like. A hook or a handle that is temporarily fixed in a state may be provided. Furthermore, the partition plate 3 may be fixed to the work scaffold D2 when the suction pipe water stop device 1 is installed.

また、本実施形態では、シール部が円環状の環状チューブ２であるが、図５に示すように、シール部４１を円盤状として、このシール部４１の上面に板状の仕切部４２を接合させて、吸出管用止水装置４を構成してもよい。さらには、シール部と仕切部とが一体で構成されている吸出管用止水装置であってもよい。すなわち、吸出管用止水装置を風船のような膨張体（図５のシール部４１に相当）で構成し、その中央部を仕切部とし、外周部（吸出管Ｄの内周面側）をシール部とするようにしてもよい。   In this embodiment, the seal portion is an annular tube 2, but as shown in FIG. 5, the seal portion 41 is formed in a disc shape, and a plate-like partition portion 42 is joined to the upper surface of the seal portion 41. The suction pipe water stop device 4 may be configured. Furthermore, a water stop device for a suction pipe in which a seal portion and a partition portion are integrally formed may be used. That is, the suction pipe water stop device is constituted by an inflatable body such as a balloon (corresponding to the seal part 41 in FIG. 5), the central part thereof is used as a partition part, and the outer peripheral part (the inner peripheral surface side of the suction pipe D) is sealed. You may make it be a part.

本発明の実施形態に係わる吸出管用止水装置を示す正面図（ａ）と平面図（ｂ）である。It is the front view (a) and top view (b) which show the water stop apparatus for suction pipes concerning embodiment of this invention. 本発明の実施形態に係わる吸出管用止水装置とフランシス水車などとの位置関係を示す概略断面図である。It is a schematic sectional drawing which shows the positional relationship of the water stop apparatus for suction pipes concerning embodiment of this invention, a Francis turbine, etc. 本発明の実施形態に係わる吸出管用止水装置を吸出管内に設置した状態を示す断面図である。It is sectional drawing which shows the state which installed the water stop apparatus for the suction pipe concerning embodiment of this invention in the suction pipe. 図３のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 本発明の実施形態に係わる第２の吸出管用止水装置を示す正面図（ａ）と平面図（ｂ）である。It is the front view (a) and top view (b) which show the 2nd water stop apparatus for suction pipes concerning embodiment of this invention.

符号の説明Explanation of symbols

１ 吸出管用止水装置
２ 環状チューブ（シール部）
２１ バルブ
３ 仕切板（仕切部）
３１ 第１仕切板
３２ 第２仕切板
３３ 蝶番
３４ シール材
Ｔ フランシス水車（水車）
Ｓ 取水管
Ｄ 吸出管
Ｄ１ マンホール
Ｄ２ 作業足場
Ｄ３ 足場支持部
Ｒ 放水路 1 Water stop device for suction pipe 2 Annular tube (seal part)
21 Valve 3 Partition plate (partition)
31 1st partition plate 32 2nd partition plate 33 Hinge 34 Seal material T Francis turbine (turbine)
S intake pipe D suction pipe D1 manhole D2 work scaffold D3 scaffold support R discharge channel

Claims (1)

水車からの吸出水を放水路に導くための吸出管の内部に設置され、前記吸出管を止水するための吸出管用止水装置であって、
板状で、前記吸出管内に設置されている作業足場の前記放水路側の面に当接するように配設されて、前記吸出管内を前記水車側と前記放水路側とに仕切る仕切部と、
気体を入れると膨らんで前記仕切部と前記吸出管の内周面との間を密閉し、前記吸出管の内周面を押圧して前記仕切部を前記吸出管内に保持するシール部と、を備え、
前記シール部が環状で、この環内を塞ぐように前記シール部の前記作業足場側の面に前記仕切部が接合され、
前記仕切部が一体として折り畳み可能で、展開した際に折り目を密閉するシール材が設けられている、
ことを特徴とする吸出管用止水装置。
A water stop device for a suction pipe installed inside the suction pipe for guiding the suction water from the water wheel to the water discharge channel, and for stopping the suction pipe;
A partition that is plate-like and is disposed so as to abut on the surface of the water discharge path of a work scaffold installed in the suction pipe, and partitions the inside of the suction pipe into the water wheel side and the water discharge path side;
A seal portion that expands when gas is introduced and seals between the partition portion and the inner peripheral surface of the suction pipe, and presses the inner peripheral surface of the suction pipe to hold the partition portion in the suction pipe; Bei example,
The partition portion is joined to a surface of the seal portion on the working scaffold side so as to close the inside of the seal portion, the seal portion being annular,
The partition part is foldable as an integral part, and a sealing material that seals the crease when deployed is provided,
A water stop device for a suction pipe.
JP2006015253A 2006-01-24 2006-01-24 Water stop device for suction pipe Expired - Fee Related JP4901224B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006015253A JP4901224B2 (en) 2006-01-24 2006-01-24 Water stop device for suction pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006015253A JP4901224B2 (en) 2006-01-24 2006-01-24 Water stop device for suction pipe

Publications (2)

Publication Number Publication Date
JP2007198174A JP2007198174A (en) 2007-08-09
JP4901224B2 true JP4901224B2 (en) 2012-03-21

Family

ID=38453033

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006015253A Expired - Fee Related JP4901224B2 (en) 2006-01-24 2006-01-24 Water stop device for suction pipe

Country Status (1)

Country Link
JP (1) JP4901224B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101141143B1 (en) 2009-12-30 2012-05-02 금호타이어 주식회사 Pneumatic tire
CN107242884B (en) * 2017-08-11 2023-02-21 中国人民解放军成都军区总医院 Automatic sample collecting device for urine three-cup test

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6079084A (en) * 1983-10-06 1985-05-04 Nissan Motor Co Ltd Highly penetrative sealant composition
JP2000230472A (en) * 1999-02-09 2000-08-22 Mitsubishi Heavy Ind Ltd Water stopping device for draft tube

Also Published As

Publication number Publication date
JP2007198174A (en) 2007-08-09

Similar Documents

Publication Publication Date Title
CN101706026A (en) Air inflation sealing device for pipeline connection
JP4901224B2 (en) Water stop device for suction pipe
ITCO20090063A1 (en) METHODS AND SYSTEMS FOR RADIUS WELDING
US4144908A (en) Pipe plugging device and method
CN104344152B (en) Pipeline non-excavation rehabilitation device and trenchless repairing method
US9970326B2 (en) Gas turbine in situ inflatable bladders for on-wing repair
US4070904A (en) Pipeline joint tester
CN114542846B (en) Gas pipeline pressurized leakage blocking device and leakage blocking method thereof
KR20040000159A (en) A sewer-branch-pipe repair apparatus and its method
JP2010249227A (en) Piping shut-off device and method for shutting off piping
JP2009024772A (en) Residual gas exhausting auxiliary tool and its method
CN212480516U (en) Drainage air bag for pipeline maintenance and maintenance device
JP2019095032A (en) Method for repairing fluid leaking point
JP2019055355A (en) Desulfurizer
CN110686137A (en) Multipurpose pressurized plugging air bag for pipeline emergency repair and using method thereof
JP2005121057A (en) Balloon type duct passage opening and shutting device
JP2023035212A (en) Flue seal balloon and flue seal method
RU2730132C2 (en) Device for tight closure of internal cavity of oil product pipeline or oil pipeline
JP4932581B2 (en) Perforated part sealing method for existing pipes to be lined and perforated part sealing structure
CN105171280B (en) A kind of pipeline band water welded airbag and welding method
JP4992448B2 (en) Piping leak prevention device
CN221404591U (en) Municipal sewage pipeline water-blocking test plug
CN219493472U (en) Gasbag structure suitable for municipal pipeline shutoff
CN218914189U (en) Pipeline gasbag shutoff instrument
KR20130026470A (en) Temporary piping system for the selected range flow from the whole piping system

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20081117

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20101227

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110524

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110613

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20111220

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20111227

R150 Certificate of patent or registration of utility model

Ref document number: 4901224

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150113

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150113

Year of fee payment: 3

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees