JPH06173596A - Earth-moving port emergency cut-off device of shield machine - Google Patents
Earth-moving port emergency cut-off device of shield machineInfo
- Publication number
- JPH06173596A JPH06173596A JP4330583A JP33058392A JPH06173596A JP H06173596 A JPH06173596 A JP H06173596A JP 4330583 A JP4330583 A JP 4330583A JP 33058392 A JP33058392 A JP 33058392A JP H06173596 A JPH06173596 A JP H06173596A
- Authority
- JP
- Japan
- Prior art keywords
- gate
- pressure
- accumulator
- earth
- emergency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はシールド掘進機の排土口
緊急遮断装置に係り、さらに詳しくいえば、掘削土砂を
排出するスクリュコンベアの排土口用ゲートを、停電な
どで通常時のゲート開閉操作ができない非常時に緊急遮
断操作するための装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth exit emergency shutoff device for a shield machine, and more specifically, it is used as an earth exit gate of a screw conveyor for discharging excavated earth and sand during a power failure. The present invention relates to a device for performing an emergency shutoff operation in an emergency where opening and closing operations cannot be performed.
【０００２】[0002]
【従来の技術】従来の排土口緊急遮断装置を備えたシー
ルド掘進機の一例を図２、図３に示す。図２、図３にお
いて、１はシールド本体、２はシールド本体１を切羽側
と機内側とに区画する隔壁、３はシールド本体１の前部
に回転自在に支持され、地山を掘削するカッタヘッド、
４はカッタヘッド３を回転させるカッタ駆動装置、５は
掘削土砂を取り込むカッタチャンバ、６は隔壁２を貫通
して設置され、カッタチャンバ５から土砂を排出するス
クリュコンベア、７はスクリュコンベア６の排土口、８
は排土口用ゲート、９はゲート８を開閉操作するゲート
ジャッキである。2. Description of the Related Art An example of a shield machine equipped with a conventional earth exit emergency shutoff device is shown in FIGS. In FIGS. 2 and 3, 1 is a shield body, 2 is a partition wall that divides the shield body 1 into a face and a machine side, and 3 is a cutter that is rotatably supported by the front portion of the shield body 1 and excavates the natural ground. head,
4 is a cutter driving device for rotating the cutter head 3, 5 is a cutter chamber for taking in the excavated soil, 6 is a screw conveyor installed through the partition wall 2 to discharge the sand from the cutter chamber 5, and 7 is a discharge for the screw conveyor 6. Doguchi, 8
Is an excavation gate, and 9 is a gate jack for opening and closing the gate 8.
【０００３】次に、排土口用ゲート８の開閉操作につい
て図４により説明する。通常時は、油圧ポンプ１０とリ
リーフ弁１１とを組み合せた油圧源１２から逆止弁１３
−１を経て電磁切換弁１４へ圧力油が送られ、図示しな
い操作盤からのソレノイドａ，ｂの選択励磁により圧力
油の流れを切り換えてゲートジャッキ９に供給すること
で、排土口用ゲート８の開閉操作が行われる。同時に、
油圧源１２からの圧力油を緊急遮断用油圧回路のアキュ
ムレータ１５に逆止弁１３−２を通して流入させ、規定
圧まで蓄圧する。Next, the opening / closing operation of the soil discharging gate 8 will be described with reference to FIG. Normally, from the hydraulic source 12 that is a combination of the hydraulic pump 10 and the relief valve 11 to the check valve 13
The pressure oil is sent to the electromagnetic switching valve 14 via -1, and the flow of the pressure oil is switched by the selective excitation of the solenoids a and b from the operation panel (not shown) to supply the pressure oil to the gate jack 9. Opening / closing operation 8 is performed. at the same time,
The pressure oil from the hydraulic power source 12 is caused to flow into the accumulator 15 of the hydraulic circuit for emergency shutoff through the check valve 13-2, and the pressure is accumulated up to the specified pressure.
【０００４】通常、排土口用ゲート８は掘進開始時に開
操作され、掘進停止時に閉操作されるが、掘進中に停電
などで油圧ポンプ１０が停止したり、電磁切換弁１４が
操作不能になったりして、通常時のゲート開閉操作がで
きなくなることがある。その場合は、アキュムレータ１
５の後段のストップバルブ１６を開き、アキュムレータ
１５に蓄積された圧力油を手動切換弁１７を通してゲー
トジャッキ９へ放出することにより排土口用ゲート８を
緊急遮断操作して、排土口７からの地下水や土砂の噴発
を防止する。なお、緊急遮断時に排土口用ゲート８が礫
などの異物をかみ込んだ場合、ゲートを一旦開方向に戻
して異物を排除できるように、手動切換弁１７はゲート
ジャッキ９を開閉両方向に操作可能となっている。スト
ップバルブ１６は、手動切換弁１７の内部漏れによるア
キュムレータ１５の蓄圧低下を防止するため、常時閉じ
られている。Normally, the excavation gate 8 is opened at the start of excavation and closed at the time of stopping excavation. However, the hydraulic pump 10 is stopped due to a power failure during excavation, or the electromagnetic switching valve 14 becomes inoperable. In some cases, it may become impossible to open and close the gate at normal times. In that case, accumulator 1
5, the stop valve 16 in the latter stage of 5 is opened, and the pressure oil accumulated in the accumulator 15 is discharged to the gate jack 9 through the manual switching valve 17 to perform an emergency shut-off operation of the gate 8 for the soil discharge port, and then from the soil discharge port 7. To prevent the eruption of groundwater and sediment. In addition, when the earth removal gate 8 bites foreign matter such as gravel during emergency shutoff, the manual switching valve 17 operates the gate jack 9 in both opening and closing directions so that the foreign matter can be removed by returning the gate to the opening direction once. It is possible. The stop valve 16 is always closed in order to prevent the accumulation pressure of the accumulator 15 from decreasing due to internal leakage of the manual switching valve 17.
【０００５】[0005]
【発明が解決しようとする課題】従来、排土口緊急遮断
装置として、上記のようにアキュムレータの蓄圧を利用
して排土口用ゲートの緊急遮断操作を行うようにしたも
のがある。しかし、オペレータがアキュムレータの蓄圧
状態を把握していないため、何らかの理由によりアキュ
ムレータの蓄圧が排土口用ゲートの緊急遮断操作に必要
な規定圧まで達していない蓄圧不十分な状態であるにも
拘らず、電磁切換弁１４を切り換えてゲート開操作を行
った場合、停電などの非常時に緊急遮断の機能を果せな
い恐れがあった。Conventionally, there has been a conventional soil discharge outlet emergency shutoff device for performing an emergency shutoff operation of the soil discharge outlet gate by utilizing the accumulated pressure of the accumulator as described above. However, because the operator does not know the accumulated pressure of the accumulator, for some reason the accumulated pressure of the accumulator has not reached the specified pressure necessary for the emergency shutoff operation of the gate for the soil discharge port. If the electromagnetic switching valve 14 is switched to perform the gate opening operation, there is a possibility that the emergency shutoff function cannot be achieved in an emergency such as a power failure.
【０００６】本発明の目的は、アキュムレータの蓄圧不
十分な場合、オペレータの注意を喚起し、非常時に排土
口の緊急遮断ができないという危険な事態の発生を未然
に防止できるようにしたシールド掘進機の排土口緊急遮
断装置を提供することにある。An object of the present invention is to shield an operator by alerting the operator when the accumulator pressure is not sufficiently accumulated and preventing a dangerous situation in which an emergency shutoff of the earth discharging port cannot be performed in an emergency. The purpose is to provide an emergency shut-off device for the machine outlet.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明は、通常時、油圧源からの圧力油を電磁切換弁
を通してゲートジャッキに供給し、スクリュコンベアの
排土口用ゲートを開閉操作させる油圧回路とは別に、油
圧源からの圧力油をアキュムレータに蓄積し、その蓄積
された圧力油を手動切換弁を通してゲートジャッキへ放
出することにより、排土口用ゲートの緊急遮断操作を行
わせる油圧回路を設けたシールド掘進機の排土口緊急遮
断装置において、上記アキュムレータの蓄圧が排土口用
ゲートの緊急遮断操作に必要な規定圧に達しているか否
かによりオン・オフ信号を発する圧力スイッチを油圧回
路に付加し、アキュムレータの蓄圧が規定圧に達してい
ないことを示す上記圧力スイッチの出力信号に応答し
て、蓄圧異常の警報・表示と、上記電磁切換弁のゲート
開操作位置への切換をできなくするようなインタロック
とを行う電気回路を具備したことを特徴とする。In order to achieve the above object, the present invention normally supplies pressure oil from a hydraulic power source to a gate jack through an electromagnetic switching valve to open and close a discharge outlet gate of a screw conveyor. In addition to the hydraulic circuit to be operated, the pressure oil from the hydraulic source is accumulated in the accumulator, and the accumulated pressure oil is discharged to the gate jack through the manual switching valve to perform the emergency shutoff operation of the gate for the soil discharge port. In the earth removal gate emergency shutoff device of the shield machine equipped with a hydraulic circuit, an ON / OFF signal is issued depending on whether the accumulated pressure of the accumulator has reached the specified pressure necessary for the emergency shutoff operation of the gate for the soil exit. A pressure switch is added to the hydraulic circuit, and an alarm of accumulated pressure is generated in response to the output signal of the pressure switch indicating that the accumulated pressure of the accumulator has not reached the specified pressure. A display, characterized by comprising an interlock electrical circuit that performs such that can not switching of the gate opening operation position of the electromagnetic switching valve.
【０００８】[0008]
【作用】アキュムレータの蓄圧が規定圧に達していない
ことを示す信号が圧力スイッチから出力されると、これ
に応答する電気回路の警報・表示機能によりオペレータ
に蓄圧異常を知らせる。同時に、通常時ゲート開閉操作
用油圧回路の電磁切換弁が電気的にインタロックされ、
操作盤からのゲート開操作ができなくなるので、アキュ
ムレータの蓄圧不十分な状態でゲート開操作を行った場
合のように排土口の緊急遮断不能という危険な事態を招
くことがない。When the signal indicating that the accumulated pressure of the accumulator has not reached the specified pressure is output from the pressure switch, the alarm / display function of the electric circuit responding to this signal notifies the operator of the accumulated pressure abnormality. At the same time, the electromagnetic switching valve of the hydraulic circuit for normal gate opening / closing operation is electrically interlocked,
Since the gate opening operation cannot be performed from the operation panel, there is no danger of being unable to shut off the soil discharge port in an emergency, unlike when the gate opening operation is performed in a state where the accumulator pressure is insufficient.
【０００９】[0009]
【実施例】以下、本発明の実施例を図１を用いて説明す
る。EXAMPLE An example of the present invention will be described below with reference to FIG.
【００１０】図１の（ａ）に示す本実施例の油圧回路は
図４に示す従来例の油圧回路に圧力スイッチ１８を付加
したもので、図４と同等の部分には同一符号を付し、そ
の説明を省略する。上記圧力スイッチ１８は緊急遮断用
油圧回路のアキュムレータ１５の蓄圧状態を常時監視で
きる位置に設置されていて、アキュムレータ１５の蓄圧
が排土口用ゲートの緊急遮断操作に必要な規定圧（ゲー
トジャッキ９の定格作動油圧）に達しているか否かによ
りオン・オフ信号を発し、その信号はシールド掘進機の
運転席に設置された操作盤（図示しない）に送られる。The hydraulic circuit of this embodiment shown in FIG. 1 (a) is obtained by adding a pressure switch 18 to the hydraulic circuit of the conventional example shown in FIG. 4, and the same parts as those in FIG. , The description is omitted. The pressure switch 18 is installed at a position where the accumulator 15 of the emergency cutoff hydraulic circuit can constantly monitor the accumulated pressure, and the accumulated pressure of the accumulator 15 is a specified pressure (gate jack 9) necessary for an emergency cutoff operation of the earth gate. An ON / OFF signal is issued depending on whether or not it has reached the rated operating hydraulic pressure of (1), and the signal is sent to an operation panel (not shown) installed in the driver's seat of the shield machine.
【００１１】図１の（ｂ）は本実施例の電気回路図で、
圧力スイッチ１８の接点はリレー１９に接続されてお
り、リレー１９の常開接点１９ａはインタロック用接点
として電磁切換弁１４のソレノイドａ側に直列に接続さ
れ、またリレー１９の常閉接点１９ｂは警報表示用接点
として表示ランプ２０と警報ブザー２１に直列に接続さ
れている。２２は電磁切換弁１４のソレノイドａ，ｂを
選択励磁する操作スイッチである。FIG. 1B is an electric circuit diagram of this embodiment.
The contact of the pressure switch 18 is connected to the relay 19, the normally open contact 19a of the relay 19 is connected in series to the solenoid a side of the electromagnetic switching valve 14 as an interlock contact, and the normally closed contact 19b of the relay 19 is connected. It is connected in series to the display lamp 20 and the alarm buzzer 21 as an alarm display contact. Reference numeral 22 is an operation switch for selectively exciting the solenoids a and b of the electromagnetic switching valve 14.
【００１２】圧力スイッチ１８は、アキュムレータ１５
の蓄圧が規定圧に達したときオンの状態になるものとす
ると、このオン信号によりリレー１９が付勢され、常開
接点１９ａが閉、常閉接点１９ｂが開になるので、イン
タロックおよび警報・表示が解除され、操作スイッチ２
２によりソレノイドａ，ｂを選択励磁することで、通常
時のゲート開閉操作ができるようになる。しかし、アキ
ュムレータ１５の蓄圧が規定圧に達していないときは、
圧力スイッチ１８がオフの状態にあるため、リレー１９
は消勢し、したがって常閉接点１９ｂが閉となり、操作
盤面上の表示ランプ２０の点灯と、警報ブザー２１の作
動によってオペレータに蓄圧異常を知らせる。同時に、
リレー１９の常開接点１９ａが開になることで、電磁切
換弁１４は、ソレノイドａの励磁、つまりゲート開操作
位置への切換できないようにインタロックされる。The pressure switch 18 includes an accumulator 15
Assuming that the ON state is reached when the accumulated pressure reaches the specified pressure, the relay 19 is energized by this ON signal, the normally open contact 19a is closed, and the normally closed contact 19b is opened.・ Display is canceled and operation switch 2
By selectively energizing the solenoids a and b by 2, the gate opening / closing operation can be performed in a normal state. However, when the accumulated pressure of the accumulator 15 has not reached the specified pressure,
Since the pressure switch 18 is off, the relay 19
Is deenergized, so that the normally closed contact 19b is closed, the indicator lamp 20 on the operation panel surface is turned on, and the alarm buzzer 21 is activated to notify the operator of the accumulated pressure abnormality. at the same time,
When the normally open contact 19a of the relay 19 is opened, the electromagnetic switching valve 14 is interlocked so that the solenoid a cannot be excited, that is, cannot be switched to the gate opening operation position.
【００１３】図ではリレーを用いて電気回路を構成して
いるが、リレーの代わりにシーケンサを用いて同様の機
能を得ることもできる。Although an electric circuit is constructed by using a relay in the figure, a sequencer may be used instead of the relay to obtain the same function.
【００１４】[0014]
【発明の効果】本発明によれば、アキュムレータが蓄圧
不十分な状態にあることを警報・表示することで、オペ
レータの注意を喚起し、アキュムレータの蓄圧を規定圧
に維持するために必要な処置を講じさせることができ
る。さらに、アキュムレータの蓄圧不十分な状態では操
作盤からのゲート開操作ができないように電磁切換弁の
インタロックを行うことにより、蓄圧不十分な状態であ
るにも拘らず、排土口用ゲートを開操作し、停電などの
非常時に排土口の緊急遮断ができないという危険な事態
を招くことを未然に防止でき、安全性をより高めること
ができる。According to the present invention, by performing an alarm / display that the accumulator is in a state where the pressure is insufficiently accumulated, the operator is alerted and necessary measures are taken to maintain the accumulated pressure in the accumulator at the prescribed pressure. Can be taken. Furthermore, by interlocking the electromagnetic switching valve so that the gate cannot be opened from the operation panel when the accumulator pressure is insufficient, the gate for the soil discharge port can be opened even if the pressure is insufficient. It is possible to prevent a dangerous situation in which the soil discharge outlet cannot be shut off in an emergency such as a power failure in the event of an opening operation, and safety can be further improved.
【図１】本発明の一実施例を示す図で、（ａ）は油圧回
路図、（ｂ）は電気回路図である。FIG. 1 is a diagram showing an embodiment of the present invention, in which (a) is a hydraulic circuit diagram and (b) is an electrical circuit diagram.
【図２】排土口緊急遮断装置を備えたシールド掘進機の
全体断面図である。FIG. 2 is an overall cross-sectional view of a shield machine equipped with a soil discharge port emergency shutoff device.
【図３】図２の排土口周辺部の拡大図である。FIG. 3 is an enlarged view of the area around the soil discharge port of FIG.
【図４】従来の排土口緊急遮断装置を示す油圧回路図で
ある。FIG. 4 is a hydraulic circuit diagram showing a conventional earth exit emergency shutoff device.
１…シールド本体、６…スクリュコンベア、７…排土
口、８…排土口用ゲート、９…ゲートジャッキ、１２…
油圧源、１４…電磁切換弁、１５…アキュムレータ、１
７…手動切換弁、１８…圧力スイッチ、１８…リレー、
１９ａ…インタロック用接点、１９ｂ…警報表示用接
点、２０…表示ランプ、２１…警報ブザー。DESCRIPTION OF SYMBOLS 1 ... Shield main body, 6 ... Screw conveyor, 7 ... Soil discharge port, 8 ... Soil discharge gate, 9 ... Gate jack, 12 ...
Hydraulic power source, 14 ... electromagnetic switching valve, 15 ... accumulator, 1
7 ... Manual switching valve, 18 ... Pressure switch, 18 ... Relay,
19a ... interlock contact, 19b ... alarm display contact, 20 ... indicator lamp, 21 ... alarm buzzer.
Claims (1)
弁を通してゲートジャッキに供給し、スクリュコンベア
の排土口用ゲートを開閉操作させる油圧回路とは別に、
油圧源からの圧力油をアキュムレータに蓄積し、その蓄
積された圧力油を手動切換弁を通してゲートジャッキへ
放出することにより、排土口用ゲートの緊急遮断操作を
行わせる油圧回路を設けたシールド掘進機の排土口緊急
遮断装置において、上記アキュムレータの蓄圧が排土口
用ゲートの緊急遮断操作に必要な規定圧に達しているか
否かによりオン・オフ信号を発する圧力スイッチを油圧
回路に付加し、アキュムレータの蓄圧が規定圧に達して
いないことを示す上記圧力スイッチの出力信号に応答し
て、蓄圧異常の警報・表示と、上記電磁切換弁のゲート
開操作位置への切換をできなくするようなインタロック
とを行う電気回路を具備したことを特徴とするシールド
掘進機の排土口緊急遮断装置。1. A hydraulic circuit that normally supplies pressure oil from a hydraulic source to a gate jack through an electromagnetic switching valve to open and close a discharge outlet gate of a screw conveyor.
Accumulator accumulates pressure oil from a hydraulic source, and the accumulated pressure oil is discharged to the gate jack through a manual switching valve to provide a shield circuit with a hydraulic circuit to perform an emergency shut-off operation of the earth gate. In the earth removal gate emergency shutoff device of the machine, a pressure switch that issues an on / off signal depending on whether the accumulated pressure of the accumulator has reached the specified pressure necessary for the emergency shutoff operation of the soil discharge gate is added to the hydraulic circuit. , In response to the output signal of the pressure switch indicating that the accumulated pressure of the accumulator has not reached the specified pressure, the alarm / display of abnormal accumulation of pressure and the switching of the solenoid switching valve to the gate opening operation position can be disabled. Emergency shutoff device for shield excavator, which is equipped with an electric circuit that performs various interlocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33058392A JP2747406B2 (en) | 1992-12-10 | 1992-12-10 | Discharge port emergency shut-off device of shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33058392A JP2747406B2 (en) | 1992-12-10 | 1992-12-10 | Discharge port emergency shut-off device of shield machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06173596A true JPH06173596A (en) | 1994-06-21 |
| JP2747406B2 JP2747406B2 (en) | 1998-05-06 |
Family
ID=18234277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33058392A Expired - Fee Related JP2747406B2 (en) | 1992-12-10 | 1992-12-10 | Discharge port emergency shut-off device of shield machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2747406B2 (en) |
-
1992
- 1992-12-10 JP JP33058392A patent/JP2747406B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2747406B2 (en) | 1998-05-06 |
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