JP2002348839A - Sand discharge facility - Google Patents
Sand discharge facilityInfo
- Publication number
- JP2002348839A JP2002348839A JP2001155476A JP2001155476A JP2002348839A JP 2002348839 A JP2002348839 A JP 2002348839A JP 2001155476 A JP2001155476 A JP 2001155476A JP 2001155476 A JP2001155476 A JP 2001155476A JP 2002348839 A JP2002348839 A JP 2002348839A
- Authority
- JP
- Japan
- Prior art keywords
- sand
- vortex tube
- slit
- door body
- door
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- Barrages (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、主に勾配の緩やか
な沈砂池、例えば発電所等の沈砂池に使用する排砂設備
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sand discharging facility mainly used in a sand basin having a gentle slope, for example, a sand basin such as a power plant.
【０００２】[0002]
【従来の技術】従来の排砂設備としては図６に示すよう
に、流れ込み式水力発電所の取水口下流側に沈砂池９１
を設け、その沈砂池の側方に排砂ゲート９２を設けたも
のが知られている。2. Description of the Related Art As a conventional sand discharging facility, as shown in FIG. 6, a sand basin 91 is located downstream of an intake port of a run-of-river hydroelectric power plant.
Is provided, and a sand discharge gate 92 is provided beside the sand basin.
【０００３】ところが、この沈砂池に土砂が堆積した場
合は、発電を一時停止し、排砂ゲートを全開にして流水
の掃流力を利用して排砂する必要があり、発電所の運転
効率が低下することになった。However, if sediment accumulates in this sand basin, it is necessary to temporarily stop power generation, open the sand discharge gate fully, and use the scavenging force of running water to discharge sand, and the operating efficiency of the power plant must be improved. Has been reduced.
【０００４】そこで、発電を一時停止しなくてもよいよ
うに、図７に示すように、排砂ゲートの上流側に渦動管
９３を設置し、仕切弁９４の開閉によって土砂を自然と
排出するものが開発された。Therefore, as shown in FIG. 7, a vortex tube 93 is installed upstream of the sand discharge gate so that the power generation does not need to be temporarily stopped, and the sediment is naturally discharged by opening and closing the gate valve 94. Things were developed.
【０００５】渦動管とは、円筒管の偏心位置上部にスリ
ット９５を形成したもので、渦動管上に堆積する土砂
を、水流を利用してスリット内に導き、螺旋流を発生さ
せて自然と排砂するもので、例えば特開平５−９８６２
４号公報に開示されている。The vortex tube has a slit 95 formed above the eccentric position of a cylindrical tube, and the sediment deposited on the vortex tube is guided into the slit by using a water flow to generate a helical flow and naturally. Sand is discharged, for example, as disclosed in Japanese Patent Laid-Open No. 5-9862.
No. 4 discloses this.
【０００６】しかし、渦動管を設置した排砂設備は、図
８に示すように、水路脇の擁壁９６に渦動管の一端部が
完全に埋設した形態となっているので、渦動管上にスリ
ットの溝幅よりも大きな粒径の土砂が載ると、擁壁によ
ってその土砂は排出を阻止され、最終的にはスリットが
塞がれて、排砂機能が停止することになった。かといっ
て、あまりに大きなスリットを開けると、螺旋流の勢い
が弱まって排砂機能が低下し、役に立たない。従って、
スリットが目詰まりした後は排砂ゲートのみを有する排
砂設備と機能的には全く同じことになった。また、スリ
ット上の土石を除去する作業には、労力及びそれに伴う
費用がかかるという問題がある。However, as shown in FIG. 8, the sand discharge equipment provided with a vortex tube has a configuration in which one end of the vortex tube is completely embedded in a retaining wall 96 beside the water channel, so that the vortex tube is disposed above the vortex tube. When earth and sand having a particle diameter larger than the width of the slit was loaded, the earth and sand were prevented from being discharged by the retaining wall, and finally the slit was blocked and the sand discharging function was stopped. On the other hand, if the slit is too large, the power of the spiral flow is weakened, and the sand discharging function is reduced, which is useless. Therefore,
After the slit was clogged, it became functionally the same as the sand discharge equipment having only the sand discharge gate. In addition, there is a problem that the work for removing the debris on the slit requires labor and accompanying costs.
【０００７】[0007]
【発明が解決しようとする課題】本発明は上記実情を考
慮して開発されたもので、その主目的は、発電所の運転
効率を向上でき、しかも、排砂機能を長期間に亘って維
持できる排砂設備を提供することである。SUMMARY OF THE INVENTION The present invention has been developed in consideration of the above circumstances, and its main purpose is to improve the operation efficiency of a power plant and to maintain the sand discharging function for a long period of time. The goal is to provide a possible sand removal facility.
【０００８】[0008]
【課題を解決するための手段】請求項１記載の発明は、
扉体が昇降する排砂ゲートを水路の沈砂池に有し、沈砂
池の底に第一渦動管をそのスリットが上方に通じる状態
で埋設すると共に、第一渦動管並びに第一渦動管よりも
上方の排出口を、扉体で開閉することを特徴とする。According to the first aspect of the present invention,
A sand drainage gate for the door body to move up and down is provided in the sand basin of the channel, and the first vortex tube is buried in the bottom of the basin with its slit leading upward, and the first vortex tube and the first vortex tube are more The upper outlet is opened and closed by a door.
【０００９】請求項２記載の発明は、第一渦動管の上流
側に第二渦動管を、沈砂池よりも上流側の底に埋設し、
第二渦動管のスリットの溝幅を、第一渦動管のスリット
の溝幅よりも広くし、第二渦動管のスリットの下流に、
導水板をスリットに沿って起立してあることが望まし
い。According to a second aspect of the present invention, a second vortex tube is buried on the upstream side of the sand basin on the upstream side of the first vortex tube,
The groove width of the slit of the second vortex tube, wider than the groove width of the slit of the first vortex tube, downstream of the slit of the second vortex tube,
It is desirable that the water guide plate be erected along the slit.
【００１０】このようにすれば、上流側の第二渦動管で
は粒径の大きな土砂を排出できるので、下流側の第一渦
動管のスリットが土砂で目詰まりし難くなり、排砂ゲー
トの扉体を上昇させて排出口を開ける回数が少なくでき
る。なお、水路に流入する土砂の粒径は、予測できるの
で、スリットの溝幅は、予測できる範囲の最大粒径のも
のが入り込むことのできる大きさにしておくことが望ま
しい。[0010] In this way, the second swirl tube on the upstream side can discharge large-sized earth and sand, so that the slit of the first swirl tube on the downstream side is less likely to be clogged with the sand, and the door of the sand discharge gate can be opened. The number of times that the body is lifted and the outlet is opened can be reduced. In addition, since the particle size of the earth and sand flowing into the water channel can be predicted, it is desirable that the groove width of the slit is set to a size that allows a maximum particle size in a predictable range to enter.
【００１１】また、スリットを大きくすると、螺旋流の
勢いが弱まるので、導水板によって強制的に第二渦動管
内に取り込む水量を増加させて、粒径の大きな土砂を取
り込むようにしてある。When the size of the slit is increased, the force of the spiral flow is weakened. Therefore, the amount of water taken into the second vortex tube by the water guide plate is increased to take in large-sized earth and sand.
【００１２】[0012]
【発明の実施の形態】発電用の水路１は図３に示すよう
に、堰堤２の側方に設けた取水口３から上流水路４、沈
砂池５、導水路６が順次連続し、最終的に発電水車（図
示、省略）に導かれるものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 3, a water channel 1 for power generation has an upstream channel 4, a sedimentation basin 5, and a water channel 6 successively connected from an intake port 3 provided on a side of a bank 2 to a final stage. To a water turbine (not shown).
【００１３】そして、本発明の排砂設備は図２に示すよ
うに、沈砂池５の下流側の擁壁部には排砂ゲート７を設
け、沈砂池５の底であって溺堤８に沿って第一渦動管９
を埋設してある。図１に示すように排砂ゲート７の昇降
する扉体１０によって、第一渦動管９並びに第一渦動管
９の上方の排出口１１を開閉可能に設けてある。また、
図２及び図３に示すように上流水路４の底に第二渦動管
１２を堰堤２の下流側に向かって連通して埋設し、その
第二渦動管１２の直ぐ下流側に導水板１３を第二渦動管
１２に沿って起立したものである。As shown in FIG. 2, the sand discharging facility of the present invention is provided with a sand discharging gate 7 on the retaining wall on the downstream side of the sand basin 5, and is provided at the bottom of the sand basin 5 and on the dredge 8. Along the first vortex tube 9
Is buried. As shown in FIG. 1, the first vortex tube 9 and the discharge port 11 above the first vortex tube 9 can be opened and closed by a door body 10 that moves up and down the sand discharge gate 7. Also,
As shown in FIGS. 2 and 3, a second vortex tube 12 is buried in the bottom of the upstream water channel 4 so as to communicate with the downstream side of the dam 2, and a water guide plate 13 is provided immediately downstream of the second vortex tube 12. It stands up along the second vortex tube 12.
【００１４】第一渦動管９は図２又は図４（イ）に示す
ように、円筒の下流側上部にスリット１４を扉体１０に
届く手前まで延長し、そのスリット１４が上方に通じる
状態でコンクリートに埋設してある。一方、第二渦動管
１２は図４（ロ）に示すように、円筒の下流側上部にス
リット１５を形成し、スリット１５を上方に通じる状態
で埋設すべく、そのスリット１５の両側に案内片１６，
１６を対向して起立し、各案内片１６の上端に固定片１
７を外向きに屈曲して延長し、下流側の固定片１７に沿
って導水板１３を起立してある。なお導水板１３にはリ
ブ１８が付けてある。As shown in FIG. 2 or FIG. 4 (a), the first vortex tube 9 extends a slit 14 in the upper portion on the downstream side of the cylinder to a position shortly before reaching the door body 10, and in a state where the slit 14 communicates upward. It is buried in concrete. On the other hand, as shown in FIG. 4 (b), the second vortex tube 12 has a slit 15 formed in the upper portion on the downstream side of the cylinder, and guide pieces are provided on both sides of the slit 15 so as to be buried in a state communicating with the slit 15 upward. 16,
16 are fixed to each other at the upper end of each guide piece 16.
7 is bent outward and extended, and the water guide plate 13 is erected along the fixing piece 17 on the downstream side. The water guide plate 13 is provided with a rib 18.
【００１５】第一渦動管９のスリット１４の溝幅は、第
二渦動管１２のスリット１５の溝幅よりも狭くしてあ
り、具体的には第一渦動管９のスリット１４の溝幅は、
例えば３０ｍｍ以上１００ｍｍ未満のものを用い、第二
渦動管１２のスリット１５の溝幅は、例えば１００ｍｍ
以上５００ｍｍ以下のものを用いる。The groove width of the slit 14 of the first vortex tube 9 is smaller than the groove width of the slit 15 of the second vortex tube 12, and specifically, the groove width of the slit 14 of the first vortex tube 9 is ,
For example, a groove having a width of 30 mm or more and less than 100 mm is used.
The one having a length of 500 mm or more is used.
【００１６】排砂ゲート７は、戸溝１９（図２参照）に
沿って扉体１０を動力で昇降させるもので、図１（イ）
に示すように下降した状態では第一渦動管９の一端部を
水密状態で塞いでいるので、第一渦動管９による土砂の
排出は行われない。図１（ロ）に示すように扉体１０を
少し上昇させて扉体１０の下端部が第一渦動管９の上端
部に密接した状態では、水流によって第一渦動管９内に
螺旋流を発生させて排砂機能を発揮させる。図１（ハ）
に示すように、万一、第一渦動管９上にスリットの溝幅
よりも大きな粒径の土砂が載った場合には、扉体１０を
さらに上昇させて排出口１１を開けば図１（ニ）に示す
ように、スリット１４上に溜まった大きな石が流水の力
によって排出される。The sand discharging gate 7 moves the door 10 up and down along the door groove 19 (see FIG. 2) by power.
In the lowered state, the one end of the first vortex tube 9 is closed in a watertight state, so that the first vortex tube 9 does not discharge earth and sand. As shown in FIG. 1B, when the door body 10 is slightly lifted and the lower end of the door body 10 is in close contact with the upper end of the first swirl tube 9, a spiral flow is generated in the first swirl tube 9 by the water flow. Generated to exert the sand discharge function. Fig. 1 (c)
As shown in FIG. 1, if earth and sand having a particle size larger than the groove width of the slit is placed on the first vortex tube 9, if the door body 10 is further raised and the discharge port 11 is opened, the discharge port 11 is opened. As shown in d), large stones accumulated on the slit 14 are discharged by the force of flowing water.
【００１７】扉体１０と第一渦動管９、並びに扉体１０
と戸当り２０（図１参照）とは水密状態で開閉するもの
である。図５に示すように、第一渦動管９の一端部に断
面逆Ｌ字状の接合板２１を上方に延長し、接合板２１と
第一渦動管９の間には扉体側に向けて開口する溝２２
を、扉体１０の横幅に亘って形成し、溝２２内に断面Ｐ
形状の水密ゴム２３を固定し、水密ゴム２３を扉体１０
に密接してある。なお、扉体１０と戸当り２０も同様に
して水密状態を形成する。The door body 10, the first swirl tube 9, and the door body 10
The door stop 20 (see FIG. 1) opens and closes in a watertight state. As shown in FIG. 5, a joining plate 21 having an inverted L-shaped cross section is extended upward at one end of the first vortex tube 9, and an opening is provided between the joining plate 21 and the first vortex tube 9 toward the door body. Groove 22
Is formed over the lateral width of the door body 10, and a cross section P is formed in the groove 22.
The watertight rubber 23 is fixed, and the watertight rubber 23 is
Close to. In addition, the door body 10 and the door stop 20 similarly form a watertight state.
【００１８】[0018]
【発明の効果】本発明の排砂設備は、扉体を上昇させて
第一渦動管のみを開けば、沈砂池に溜まる土砂を、第一
渦動管内の螺旋流によって排砂することができる。ま
た、第一渦動管のスリットに粒径の大きな土砂が溜まっ
て目詰まりしても、排砂ゲートの扉体を上昇させて第一
渦動管よりも上方の排出口を開けば、水流によってスリ
ットの上に溜まった粒径の大きな土砂が自然と排出さ
れ、スリット内に土砂が入り込むようになり、第一渦動
管の排砂機能が回復し、その結果、排砂機能を長期間に
亘って維持できる。According to the sand discharging facility of the present invention, if the door is raised and only the first swirl pipe is opened, the sand accumulated in the sand basin can be discharged by the spiral flow in the first swirl pipe. Also, even if a large particle size soil is accumulated in the slit of the first vortex tube and clogged, if the sand discharge gate door is raised and the discharge port above the first vortex tube is opened, the slit is formed by the water flow. Large sediment with large particle size accumulated on the surface is naturally discharged, and the sediment enters into the slit, and the sand discharge function of the first vortex tube is restored, and as a result, the sand discharge function is maintained for a long time. Can be maintained.
【００１９】本発明の排砂設備を発電所の沈砂池に使用
した場合には、発電所が必要とする取水量よりも大量の
水流が沈砂池に流れ込んできたときや、発電所の出力を
抑えたときに第一渦動管を開けば、その余剰分の水流に
よって第一渦動管の排砂機能を発揮させることができ、
単なる排砂ゲートのみの排砂設備に比べて、土砂が溜ま
り難くなり、発電を停止して排砂作業をする回数が減
り、発電効率が向上する。When the sand discharging facility of the present invention is used in a sand basin of a power plant, when a larger amount of water flows into the sand basin than the amount of water required by the power plant, the output of the power plant is reduced. If the first vortex tube is opened when it is suppressed, the excess water flow can exert the sand discharge function of the first vortex tube,
Compared to a sand discharge facility having only a sand discharge gate, sediment hardly accumulates, the number of times of stopping power generation and performing sand discharge work is reduced, and power generation efficiency is improved.
【００２０】また、第二渦動管を設けた場合には、上流
側で粒径の大きな土砂が排砂されるので、第一渦動管の
スリットに土砂が一段と溜まりにくくなり、排砂ゲート
を全開にしなくとも排砂機能が長期間に亘って発揮で
き、発電効率が一段と向上する。In the case where the second vortex tube is provided, since large-sized earth and sand is discharged on the upstream side, it becomes more difficult for sediment to accumulate in the slit of the first vortex tube, and the sand discharge gate is fully opened. Without this, the sand discharge function can be exhibited for a long period of time, and the power generation efficiency is further improved.
【図１】（イ）（ロ）（ハ）（ニ）図２のＡ−Ａ線断面
図で、（イ）図は第一渦動管を閉じた状態を現し、
（ロ）図は第一渦動管のみを開いて排砂している状態を
現し、（ハ）図は第一渦動管上にスリットの溝幅よりも
大きな粒径の土砂が載った状態を現し、（ニ）図は排出
口を開いた状態を現す。1 (a), (b), (c), and (d) are cross-sectional views taken along the line AA of FIG. 2. FIG. 1 (a) shows a state in which a first vortex tube is closed.
(B) Figure shows the state where only the first vortex tube is opened to discharge sand, and (c) Figure shows the state where sediment with a particle size larger than the groove width of the slit is placed on the first vortex tube. , (D) show a state in which the outlet is opened.
【図２】本発明の排砂設備を拡大して示す平面図であ
る。FIG. 2 is an enlarged plan view showing the sand discharging facility of the present invention.
【図３】本発明の排砂設備をダムに適用した状態を示す
平面図である。FIG. 3 is a plan view showing a state in which the sand discharging facility of the present invention is applied to a dam.
【図４】（イ）（ロ）図２のＢ−Ｂ線断面図、図２のＣ
−Ｃ線断面図である。FIGS. 4A and 4B are cross-sectional views taken along line BB of FIG. 2 and C of FIG.
FIG. 4 is a sectional view taken along line C of FIG.
【図５】（イ）（ロ）図１のＤ部拡大図、図５（イ）の
Ａ−Ａ線断面図である。FIGS. 5A and 5B are an enlarged view of a portion D in FIG. 1 and a cross-sectional view taken along line AA in FIG.
【図６】従来の排砂設備を示す平面図である。FIG. 6 is a plan view showing a conventional sand discharging facility.
【図７】従来の別の排砂設備を示す平面図である。FIG. 7 is a plan view showing another conventional sand discharging facility.
【図８】図７のＥ−Ｅ線断面図である。FIG. 8 is a sectional view taken along line EE of FIG. 7;
１ 水路 ５ 沈砂池 ７ 排砂ゲート ９ 第一渦動管 １０ 扉体 １１ 排出口 １２ 第二渦動管 １３ 導水板 １４，１５ スリット DESCRIPTION OF SYMBOLS 1 Waterway 5 Sand basin 7 Sand discharge gate 9 First vortex tube 10 Door body 11 Outlet 12 Second vortex tube 13 Water guide plate 14, 15 Slit
───────────────────────────────────────────────────── フロントページの続き (72)発明者 児玉 雄二 埼玉県上尾市愛宕２−１−25−303 Ｆターム(参考） 2D019 AA48 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yuji Kodama 2-1-25-303 Atago, Ageo-shi, Saitama F-term (reference) 2D019 AA48
Claims (2)
（７）を水路（１）の沈砂池（５）に有し、沈砂池
（５）の底に第一渦動管（９）をそのスリット（１４）
が上方に通じる状態で埋設すると共に、第一渦動管
（９）並びに第一渦動管（９）よりも上方の排出口（１
１）を、扉体（１０）で開閉することを特徴とする排砂
設備。1. A sand discharge gate (7) for raising and lowering a door body (10) is provided in a sand basin (5) of a water channel (1), and a first vortex tube (9) is provided at the bottom of the sand basin (5). The slit (14)
Are buried in a state of communicating upward, and the first vortex tube (9) and the discharge port (1) above the first vortex tube (9) are buried.
1) Opening / closing a door with a door (10).
（１２）を、沈砂池（５）よりも上流側の底に埋設し、
第二渦動管（１２）のスリット（１５）の溝幅を、第一
渦動管（９）のスリット（１４）の溝幅よりも広くし、
第二渦動管（１２）のスリット（１５）の下流に、導水
板（１３）をスリット（１５）に沿って起立してあるこ
とを特徴とする請求項１記載の排砂設備。2. A second vortex tube (12) is buried on the bottom upstream of the sand basin (5) upstream of the first vortex tube (9),
Making the groove width of the slit (15) of the second vortex tube (12) wider than the groove width of the slit (14) of the first vortex tube (9);
The sand discharging facility according to claim 1, characterized in that a water guide plate (13) stands upright along the slit (15) downstream of the slit (15) of the second vortex tube (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001155476A JP2002348839A (en) | 2001-05-24 | 2001-05-24 | Sand discharge facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001155476A JP2002348839A (en) | 2001-05-24 | 2001-05-24 | Sand discharge facility |
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| Publication Number | Publication Date |
|---|---|
| JP2002348839A true JP2002348839A (en) | 2002-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001155476A Pending JP2002348839A (en) | 2001-05-24 | 2001-05-24 | Sand discharge facility |
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| JP (1) | JP2002348839A (en) |
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