JP2908112B2 - Pump control device in muddy water shield method - Google Patents
Pump control device in muddy water shield methodInfo
- Publication number
- JP2908112B2 JP2908112B2 JP7727292A JP7727292A JP2908112B2 JP 2908112 B2 JP2908112 B2 JP 2908112B2 JP 7727292 A JP7727292 A JP 7727292A JP 7727292 A JP7727292 A JP 7727292A JP 2908112 B2 JP2908112 B2 JP 2908112B2
- Authority
- JP
- Japan
- Prior art keywords
- pump
- muddy water
- pressure
- variable speed
- mud
- 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
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は泥水式シールド工法に
於けるポンプ制御装置に関するものであり、特に排泥水
の密度や圧力の変化に起因するポンプの故障を防止する
ためのポンプ制御装置に関するものである。The present invention relates to a muddy water shield method.
Pump control equipment, especially wastewater
To prevent pump failure due to changes in the density or pressure of the pump
And a pump control device for the same.
【０００２】[0002]
【従来の技術】従来の圧送ポンプ装置の一例を図２に従
って説明する。同図は泥水式シールド工法によるトンネ
ル掘削工事の設備構成を示しており、符号１は泥水処理
プラント、２はシールドマシン、３は中央監視盤であ
る。泥水処理プラント１で作成された泥水は可変速度型
送泥ポンプ４によって送泥管５内を圧送され、シールド
マシン２の隔壁６の前部のシールドチャンバ内へ供給さ
れる。送泥管５には送水流量計７と送水密度計８とが装
着され、夫々のデータは中央監視盤３へフィードバック
される。2. Description of the Related Art An example of a conventional pressure pump device will be described with reference to FIG. The figure shows the equipment configuration for tunnel excavation work using the muddy shield method, wherein reference numeral 1 denotes a muddy water treatment plant, 2 denotes a shield machine, and 3 denotes a central monitoring panel. The muddy water produced in the muddy water treatment plant 1 is pumped through a mud pipe 5 by a variable speed mud pump 4 and supplied into a shield chamber in front of a partition wall 6 of the shield machine 2. A water flow meter 7 and a water density meter 8 are attached to the mud pipe 5, and the respective data are fed back to the central monitoring panel 3.
【０００３】シールドチャンバ内の泥水は、可変速度型
排泥ポンプ９及び吐出能力に応じて適宜間隔で直列接続
された定速度型ポンプ１０，１０…により排泥管１１を
通じて泥水処理プラント１へ還流する。排泥管１１には
排水密度計１２、送水流量計１３が設けられている。泥
水の流速や圧力の変更は、中央制御盤３によって可変速
度型送泥ポンプ４及び可変速度型排泥ポンプ９の回転数
を変更することによって制御している。The muddy water in the shield chamber is returned to the muddy water treatment plant 1 through a mud pipe 11 by a variable speed type mud pump 9 and constant speed type pumps 10 connected in series at appropriate intervals according to the discharge capacity. I do. The drainage pipe 11 is provided with a drainage density meter 12 and a water flow meter 13. The change of the flow rate and the pressure of the muddy water is controlled by changing the rotation speeds of the variable speed type mud pump 4 and the variable speed mud pump 9 by the central control panel 3.
【０００４】[0004]
【発明が解決しようとする課題】前述した従来の圧送ポ
ンプ装置は、送排泥水が均一な密度であれば、設定した
流速及び圧力によって泥水の流れを一定に制御すること
ができる。しかしシールドマシンから排出される泥水
は、掘削した土砂や砂礫等が混入して均一な泥水ではな
いので、可変速度型排泥ポンプ９を通過後に、流速や圧
力が不安定に変動して流れに乱れを生じる。この乱れに
よりウォーターハンマー現象やキャビテーションが発生
して排泥管１１を破損したり、定速度型ポンプ１０，１
０…に過負荷が加わり過剩電流が流れて之等のポンプ１
０，１０…が故障することがある。また、シールドマシ
ン２の切羽水圧が変動して切羽が不安定となることもあ
る。The above-described conventional pumping apparatus can control the flow of muddy water at a constant flow rate and pressure if the muddy water has a uniform density. However, since the mud discharged from the shield machine is not uniform mud mixed with excavated earth and sand, gravel, etc., after passing through the variable speed type mud pump 9 , the flow velocity and pressure fluctuate unstablely, and Causes disturbance. Due to this turbulence, a water hammer phenomenon or cavitation occurs, which may damage the drainage pipe 11 or cause the constant-speed pumps 10, 1
0 ... is overloaded, excess current flows and the pump 1
0,10 ... May fail. In addition, the face pressure of the shield machine 2 may fluctuate and the face may become unstable.
【０００５】このような問題は、可変速度型排泥ポンプ
９と泥水処理プラント１との距離が長い場合や泥水量が
多量の場合に顕著に現われる。そこで、圧送する流体の
内容物等の条件に左右されず流れの安定化を達成し、管
路やポンプの破損等のおそれを解消するために解決すべ
き技術的課題が生じており、この発明は上記課題を解決
することを目的としている。[0005] Such a problem is caused by a variable speed type sludge pump.
This is noticeable when the distance between the plant 9 and the muddy water treatment plant 1 is long or when the amount of muddy water is large. Therefore, there is a technical problem to be solved in order to achieve the stabilization of the flow irrespective of the conditions of the contents of the fluid to be pumped, and to eliminate the possibility of breakage of the pipeline or the pump. Aims to solve the above problems.
【０００６】[0006]
【課題を解決するための手段】この発明は、上記目的を
達成するために提案するものであり、送泥管と排泥管に
設けた複数のポンプにより、シールドマシンで掘削した
土砂を泥水とともに移送する泥水式シールド工法に於い
て、排泥管側に設けられた複数のポンプのうち最上流と
最下流のみを可変速度型ポンプとし、前記最下流のポン
プの上流に圧力検出器を設け、該圧力検出器が検出する
最下流のポンプ前方の圧力変化に応じて、前記最下流の
ポンプの回転数を制御する制御部を設けた泥水式シール
ド工法に於けるポンプ制御装置を提供するものである。Means for Solving the Problems] The present invention is to propose in order to achieve the above object, the Okudoro pipe and the waste sludge line
Drilled with a shield machine by multiple pumps provided
In the muddy shield construction method that transfers soil and muddy water
Te, only the most upstream and most downstream the variable speed pump of the plurality of pumps provided in the waste sludge pipe side, the most downstream Pont
A pressure detector is provided upstream of the pump , and the pressure detector detects
A muddy seal provided with a control unit for controlling the rotation speed of the most downstream pump in accordance with a pressure change in front of the most downstream pump.
It is intended to provide a pump control device in the construction method .
【０００７】[0007]
【作用】この発明は、排泥管側には排泥管の最上流と最
下流のみに可変速度型ポンプを配置し、最下流ポンプの
上流に圧力検出器を設けてある。従って、最下流のポン
プ前方の圧力変化が圧力検出器によって検出され、該検
出値が制御部に入力されると、制御部は該検出値に基づ
いて最下流のポンプの回転数を増減し、排泥管内の圧力
が設定値となるように制御する。According to the present invention, the uppermost stream and the uppermost stream of the exhaust pipe are provided on the exhaust pipe side.
Place a variable speed pump only downstream, and
A pressure detector is provided upstream. Therefore, the most downstream pon
Pressure change flop forward is detected by the pressure detector, the said test <br/> detection value is are entered to the control unit, the control unit increases or decreases the rotational speed of the most downstream of the pump based on the detected value, Pressure in sludge pipe
Is controlled to be a set value .
【０００８】[0008]
【実施例】以下、この発明の一実施例を図１に従って説
明する。尚、説明の都合上、従来公知に属する技術事項
も同時に説明する。同図に示す泥水処理プラント２１
は、シールドマシン２２の隔壁２３の前部のシールドチ
ャンバへ、送泥管２４と排泥管２５とによって接続され
ている。送泥管２４には可変速度型送泥ポンプＰ1 と送
水流量計２６、送水密度計２７とが挿入され、シールド
マシン２２よりに切羽の水圧を検出する圧力検出器２８
が設けられている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. For convenience of explanation, technical matters belonging to the related art will be described at the same time. Mud water treatment plant 21 shown in FIG.
Is connected to a shield chamber in front of the partition wall 23 of the shield machine 22 by a mud feed pipe 24 and a mud discharge pipe 25. A variable speed type mud pump P 1 , a water flow meter 26 and a water density meter 27 are inserted into the mud pipe 24, and a pressure detector 28 for detecting the water pressure of the face by the shield machine 22.
Is provided.
【０００９】排泥管２５にはシールドマシン２２側から
順に、第１の可変速度型排泥ポンプＰ2 、定速度型ポン
プＰ3 ，…、圧力検出器２９、第２の可変速度型排泥ポ
ンプＰn 及び排水密度計３０、排水流量計３１を設けて
いる。これらのポンプＰ1 ，Ｐ2 ，Ｐ3 ，…Ｐn の制御
盤３２，３３，３４，３５並びに流量計２６，３１、密
度計２７，３０、圧力検出器２８，２９及び自動バルブ
３６，３７，３８は中央監視盤３９へ電気的に接続され
て制御される。A first variable-speed type sludge pump P 2 , a constant-speed type pump P 3 ,..., A pressure detector 29, and a second variable-speed type sludge are sequentially provided to the sludge pipe 25 from the shield machine 22 side. A pump Pn, a drainage density meter 30, and a drainage flowmeter 31 are provided. These pumps P 1, P 2, P 3 , ... P n of the control panel 32, 33, 34, 35 and flow meter 26 and 31, a density meter 27, 30, pressure detector 28, 29 and automatic valves 36, 37 , 38 are electrically connected to and controlled by a central monitoring panel 39.
【００１０】中央監視盤３９から送泥指令を出力する
と、送泥管２４の自動バルブ３６および排泥用の自動バ
ルブ３７が開き、可変速度型送泥ポンプＰ1 、第１の可
変速度型排泥ポンプＰ2 、定速度型ポンプＰ3 および第
２の可変速度型排泥ポンプＰnが起動し、シールドマシ
ン２２の隔壁２３で閉鎖されたシールドチャンバ内に泥
水が注入される。そして、シールドチャンバ内の圧力が
設定値に達すると、泥水を泥水処理プラント２１へ還流
させる。第１の可変速度型排泥ポンプＰ2 と第２の可変
速度型排泥ポンプＰn との間の管路圧力は、圧力検出器
２９によって中央監視盤３９へフィードバックされる。When a mud feed command is output from the central monitoring panel 39, the automatic valve 36 of the mud feed pipe 24 and the automatic valve 37 for drainage are opened, and the variable speed type mud pump P 1 and the first variable speed type drain pump are opened. The mud pump P 2 , the constant speed pump P 3, and the second variable speed drain pump Pn are activated, and muddy water is injected into the shield chamber closed by the partition 23 of the shield machine 22. Then, when the pressure in the shield chamber reaches the set value, the muddy water is returned to the muddy water treatment plant 21. The line pressure between the first variable speed type sludge pump P 2 and the second variable speed type sludge pump Pn is fed back to the central monitoring panel 39 by the pressure detector 29.
【００１１】中央監視盤３９は、可変速度型送泥ポンプ
Ｐ1 の送泥量と第１の可変速度型排泥ポンプＰ2 の排泥
量とを制御して切羽の水圧を一定に制御する。シールド
マシン２２の掘削に伴って第１の可変速度型排泥ポンプ
Ｐ2 から排出される泥水に掘削されたズリが混入し、均
質な泥水ではなくなると、第１の可変速度型排泥ポンプ
Ｐ2 以降の管路の流れが乱れ、管路圧力が変動する。[0011] central monitor board 39 controls the variable speed type Okudoro Okudoro of the pump P 1 and the waste sludge of the first variable speed type Hydraulic pumps P 2 and controls the pressure of working face constant . When the excavated waste mixes with muddy water discharged from the first variable speed type sludge pump P 2 in association with the excavation of the shield machine 22 and becomes not uniform muddy water, the first variable speed type sludge pump P The flow in the pipeline after 2 is disturbed, and the pipeline pressure fluctuates.
【００１２】中央監視盤３９は圧力検出器２９の検出値
を監視し、ズリ等の影響により圧力が規定値よりも上昇
したときは、第２の可変速度型排泥ポンプＰn の制御盤
３５に制御信号を出力し、このポンプＰn の回転数を増
加して排出量を増大し、第１の可変速度型排泥ポンプＰ
2 と第２の可変速度型排泥ポンプＰn との間の管路圧力
を一定に制御する。The central monitoring panel 39 monitors the value detected by the pressure detector 29, and when the pressure rises above a specified value due to the influence of shear or the like, the control panel 35 of the second variable speed type sludge pump Pn. To output a control signal to increase the number of rotations of the pump Pn to increase the discharge amount.
The pipeline pressure between the second and second variable speed type sludge pumps Pn is controlled to be constant.
【００１３】また、Ｐ2 −Ｐn 間の圧力が規定圧力範囲
よりも低下した場合は、第２の可変速度型排泥ポンプＰ
n の回転数を低下させて管路圧力を増加し、定速度型ポ
ンプＰ3 の負荷を一定範囲に制御する。このように、排
水中の泥水とズリとの比率に係わらずポンプ間の管路圧
力を一定に制御し、排泥の流れを安定化するものであ
る。When the pressure between P 2 and P n falls below the specified pressure range, the second variable speed type sludge pump P
n reduces the rotational speed of increasing the line pressure, controlling the load of the constant speed pump P 3 within a predetermined range. As described above, the pipe pressure between the pumps is controlled to be constant regardless of the ratio of the muddy water and the waste in the drainage water, and the flow of the muddy water is stabilized.
【００１４】[0014]
【００１５】[0015]
【発明の効果】この発明は、上記一実施例において述べ
たように、泥水式シールド工法に於いて、排泥管側に設
けられた圧力検出器が検出する圧力変化に応じて最下流
のポンプの回転数を制御するため、掘削したズリ等の影
響により排泥管内の圧力が変動したときは、直ちに最下
流のポンプの回転数を増減して排泥管内の圧力を一定に
し、排泥の流れを安定化させることができる。従って、
ウォーターハンマー現象やキャビテーションの発生を防
止して、配管の破損や脱落事故のおそれを解消できる。
また、ポンプに過負荷が加わることが防止され、過剰電
流によるポンプの故障を防止できる。更に、管路系全体
の流れが安定するので切羽等の圧力変動も減少し、切羽
面が安定して掘削精度が向上する。斯くして、シールド
工法に於ける安全性及び作業性の向上に寄与できる等、
正に諸種の効果を奏する発明である。According to the present invention, as described in the above embodiment, in the muddy water shield method, it is provided on the drain pipe side.
The most downstream according to the pressure change detected by the pressure sensor
To control the rotation speed of the pump
If the pressure in the mud pipe fluctuates due to sound,
Increase or decrease the number of rotations of the flow pump to keep the pressure inside the mud pipe constant
And the flow of the sludge can be stabilized. Therefore,
By preventing the occurrence of water hammer and cavitation, it is possible to eliminate the risk of damage to pipes and accidents of falling off.
In addition, overload is prevented from being applied to the pump, and failure of the pump due to excessive current can be prevented. Furthermore, since the flow of the entire pipeline system is stabilized, the pressure fluctuation of the face and the like is reduced, and the face face is stabilized and the excavation accuracy is improved. Thus, the shield
It can contribute to improvement of safety and workability in the construction method ,
This is an invention that has various effects .
【図１】本発明のポンプ圧送装置の構成図。FIG. 1 is a configuration diagram of a pump pressure feeding device of the present invention.
【図２】従来のポンプ圧送装置の構成図。FIG. 2 is a configuration diagram of a conventional pump pressure feeding device.
Ｐ2 第１の可変速度型排泥ポンプ Ｐ3 定速度型ポンプ Ｐn 第２の可変速度型排泥ポンプ ２１ 泥水処理プラント ２２ シールドマシン ２５ 排泥管 ２９ 圧力検出器 ３５ Ｐ2 制御盤 ３９ 中央監視盤P 2 first variable speed type Hydraulic pumps P 3 constant speed pump P n second variable speed type Hydraulic pumps 21 mud treatment plant 22 the shield machine 25 Haidorokan 29 pressure detector 35 P 2 control panel 39 the central Monitoring panel
───────────────────────────────────────────────────── フロントページの続き (72)発明者 飯沢 幸穂 東京都千代田区神田佐久間町３−21 東 洋工業株式会社内 (72)発明者 西野 博 東京都千代田区神田佐久間町３−21 東 洋工業株式会社内 (56)参考文献 特開 昭51−109133（ＪＰ，Ａ) 特開 昭50−82830（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) E21D 9/06 301 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yukiho Iizawa 3-21 Kanda Sakumacho, Chiyoda-ku, Tokyo Toyo Kogyo Co., Ltd. (72) Inventor Hiroshi Nishino 3-21 Kanda Sakumacho, Chiyoda-ku, Tokyo Toyo Kogyo (56) References JP-A-51-109133 (JP, A) JP-A-50-82830 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) E21D 9/06 301
Claims (1)
より、シールドマシンで掘削した土砂を泥水とともに移
送する泥水式シールド工法に於いて、排泥管側に設けら
れた複数のポンプのうち最上流と最下流のみを可変速度
型ポンプとし、前記最下流のポンプの上流に圧力検出器
を設け、該圧力検出器が検出する最下流のポンプ前方の
圧力変化に応じて、前記最下流のポンプの回転数を制御
する制御部を設けたことを特徴とする泥水式シールド工
法に於けるポンプ制御装置。(1) A plurality of pumps provided in a mud pipe and a mud pipe.
The earth and sand excavated with the shield machine
In the muddy water shield construction method for sending
Among the plurality of pumps, only the most upstream and the most downstream are variable speed pumps, and a pressure detector is provided upstream of the most downstream pump, and the pressure detector detects the upstream of the most downstream pump.
A muddy water shield system comprising a control unit for controlling the rotational speed of the most downstream pump in accordance with a pressure change.
Pump control device in the law .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7727292A JP2908112B2 (en) | 1992-03-31 | 1992-03-31 | Pump control device in muddy water shield method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7727292A JP2908112B2 (en) | 1992-03-31 | 1992-03-31 | Pump control device in muddy water shield method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05280279A JPH05280279A (en) | 1993-10-26 |
| JP2908112B2 true JP2908112B2 (en) | 1999-06-21 |
Family
ID=13629223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7727292A Expired - Fee Related JP2908112B2 (en) | 1992-03-31 | 1992-03-31 | Pump control device in muddy water shield method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2908112B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4896251B2 (en) * | 2010-06-22 | 2012-03-14 | 株式会社アクティオ | Mud drain device in the muddy water type shield method |
-
1992
- 1992-03-31 JP JP7727292A patent/JP2908112B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05280279A (en) | 1993-10-26 |
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