JP2021134564A - Tunnel excavator articulate mechanism - Google Patents

Tunnel excavator articulate mechanism Download PDF

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JP2021134564A
JP2021134564A JP2020031603A JP2020031603A JP2021134564A JP 2021134564 A JP2021134564 A JP 2021134564A JP 2020031603 A JP2020031603 A JP 2020031603A JP 2020031603 A JP2020031603 A JP 2020031603A JP 2021134564 A JP2021134564 A JP 2021134564A
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pressure
pressure sensor
seal
supply device
center
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JP7362510B2 (en
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誠 小田
Makoto Oda
誠 小田
浩靖 長谷川
Hiroyasu Hasegawa
浩靖 長谷川
健 高原
Takeshi Takahara
健 高原
亮介 脇田
Ryosuke Wakita
亮介 脇田
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Kawasaki Heavy Industries Ltd
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Kawasaki Heavy Industries Ltd
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Abstract

To provide a tunnel excavator articulate mechanism that reduces a differential pressure borne by a front-stage articulate seal.SOLUTION: An articulate mechanism 12 according to one embodiment comprises three or more articulate seals 5 arranged between a rear end 31 of a front body 3 and a front end 41 of a rear body 4, and a grease supply device 7 that supplies grease to a plurality of seal chambers 61 to 63 formed between three or more articulate seals 5. The grease supply device 7 is controlled by a control device 8 such that a pressure P1 of the rearmost seal chamber 61 detected by a second pressure sensor 83 is higher than a pressure P0 around the articulate mechanism 12 detected by a first pressure sensor 80, and a pressure P3 of the frontmost seal chamber 63 detected by a third pressure sensor 83 becomes equal to or less than the pressure P1 of the rearmost seal chamber 61 detected by the second pressure sensor 81.SELECTED DRAWING: Figure 2

Description

本発明は、トンネル掘削機の中折れ機構に関する。 The present invention relates to a center bending mechanism of a tunnel excavator.

トンネル掘削機は、地山を掘削するカッターヘッドと、このカッターヘッドを回転可能に支持する掘削機本体を含む。掘削機本体には中折れ式のものがあり、この中折れ式の掘削機本体では、管状の外殻が前胴と後胴とに分けられ、それらの間に中折れ機構が設けられる。 The tunnel excavator includes a cutter head that excavates the ground and an excavator body that rotatably supports the cutter head. There is a break-action type excavator body, and in this break-action type excavator body, a tubular outer shell is divided into a front body and a rear body, and a break-action mechanism is provided between them.

具体的に、中折れ機構では、前胴の後端部の内側に後胴の前端部が位置し、前胴の後端部と後胴の前端部とが重なり合う。また、前胴の後端部と後胴の前端部との間には、複数の環状の中折れシールが配置される。 Specifically, in the center folding mechanism, the front end of the rear torso is located inside the rear end of the front torso, and the rear end of the front torso and the front end of the rear torso overlap. Further, a plurality of annular center-folding seals are arranged between the rear end portion of the front fuselage and the front end portion of the rear fuselage.

例えば、特許文献1には、前胴の後端部と後胴の前端部との間に2つの中折れシールが配置され、それらの中折れシールの間に形成されたシール室にシール剤を充填することが記載されている。 For example, in Patent Document 1, two center-folded seals are arranged between the rear end of the front body and the front end of the rear body, and a sealant is applied to a seal chamber formed between the center-folded seals. It is described to be filled.

特開2007−303134号公報JP-A-2007-303134

ところで、トンネル掘削機が高水圧区間を掘削する場合は、中折れ機構を通じた機内への土砂水の流入を防ぐために、中折れシールを3つ以上とするとともに、中折れシールの間に形成される複数のシール室にグリスなどを充填することが望ましい。 By the way, when a tunnel excavator excavates a high water pressure section, in order to prevent the inflow of earth and sand water into the machine through the center fold mechanism, three or more center fold seals are formed and between the center fold seals. It is desirable to fill a plurality of sealing chambers with grease or the like.

一般的に、複数のシール室にグリスを充填する場合は、シール室の圧力が機外から機内に向かって段々と高くなるようにシール室へのグリスの供給量が調整される。しかしながら、このような構成では、最も前方(すなわち、機内近く)に位置するシール室の圧力と大気圧との差圧が大きくなるため、その差圧を負担する最前段の中折れシールが反転するおそれがある。 Generally, when a plurality of seal chambers are filled with grease, the amount of grease supplied to the seal chambers is adjusted so that the pressure in the seal chambers gradually increases from the outside to the inside of the machine. However, in such a configuration, the pressure difference between the pressure in the seal chamber located at the frontmost position (that is, near the inside of the machine) and the atmospheric pressure becomes large, so that the front-stage center-folded seal that bears the pressure difference is reversed. There is a risk.

そこで、本発明は、最前段の中折れシールが負担する差圧を低減することができるトンネル掘削機の中折れ機構を提供することを目的とする。 Therefore, an object of the present invention is to provide a middle-breaking mechanism of a tunnel excavator capable of reducing the differential pressure borne by the middle-breaking seal in the front stage.

前記課題を解決するために、本発明の1つの側面からのトンネル掘削機の中折れ機構は、トンネル掘削機の前胴と後胴の間の中折れ機構であって、前記前胴の後端部とこの後端部の内側に位置する前記後胴の前端部との間に配置される3つ以上の中折れシールと、前記3つ以上の中折れシールの間に形成された複数のシール室へグリスを供給するグリス供給装置と、前記中折れ機構の周囲の圧力を検出する第1圧力センサと、前記複数のシール室のうちの最も後方に位置する最後方シール室の圧力を検出する第2圧力センサと、前記複数のシール室のうちの最も前方に位置する最前方シール室の圧力を検出する第3圧力センサと、前記グリス供給装置を制御する制御装置と、を備え、前記制御装置は、前記第2圧力センサで検出される圧力が前記第1圧力センサで検出される圧力よりも高くなるとともに、前記第3圧力センサで検出される圧力が前記第2圧力センサで検出される圧力以下となるように前記グリス供給装置を制御する、ことを特徴とする。 In order to solve the above problems, the center folding mechanism of the tunnel excavator from one side of the present invention is a center folding mechanism between the front body and the rear body of the tunnel excavator, and is the rear end of the front body. Three or more center-folded seals arranged between the portion and the front end of the rear body located inside the rear end portion, and a plurality of seals formed between the three or more center-folded seals. A grease supply device that supplies grease to the chamber, a first pressure sensor that detects the pressure around the center bending mechanism, and a pressure in the rearmost sealing chamber located at the rearmost of the plurality of sealing chambers are detected. The control includes a second pressure sensor, a third pressure sensor that detects the pressure of the frontmost seal chamber located at the frontmost of the plurality of seal chambers, and a control device that controls the grease supply device. In the device, the pressure detected by the second pressure sensor becomes higher than the pressure detected by the first pressure sensor, and the pressure detected by the third pressure sensor is detected by the second pressure sensor. It is characterized in that the grease supply device is controlled so as to be below the pressure.

上記の構成によれば、最前方シール室の圧力が最後方シール室の圧力以下に保たれるので、最前段の中折れシールが負担する差圧を低減することができる。これにより、最前段の中折れシールが反転することを防止することができる。 According to the above configuration, since the pressure in the frontmost seal chamber is maintained below the pressure in the rearmost seal chamber, the differential pressure borne by the middle-folded seal in the frontmost stage can be reduced. As a result, it is possible to prevent the middle-folded seal in the front stage from being inverted.

本発明の別の側面からのトンネル掘削機の中折れ機構は、トンネル掘削機の前胴と後胴の間の中折れ機構であって、前記前胴の後端部とこの後端部の内側に位置する前記後胴の前端部との間に配置される3つ以上の中折れシールと、前記3つ以上の中折れシールの間に形成された複数のシール室のうちの前側に位置する少なくとも1つのシール室とオイルタンクとの間で閉ループを形成し、前記少なくとも1つのシール室へオイルを供給するオイル供給装置と、前記複数のシール室のうちの残りのシール室へグリスを供給するグリス供給装置と、前記中折れ機構の周囲の圧力を検出する第1圧力センサと、前記複数のシール室のうちの最も後方に位置する最後方シール室の圧力を検出する第2圧力センサと、前記グリス供給装置を制御する制御装置と、を備え、前記制御装置は、前記第2圧力センサで検出される圧力が前記第1圧力センサで検出される圧力よりも高くなるように前記グリス供給装置を制御し、前記オイル供給装置は、前記複数のシール室のうちの最も前方に位置する最前方シール室の圧力が前記第1圧力センサで検出される圧力よりも低い設定値に保たれるように構成されている、ことを特徴とする。 The center folding mechanism of the tunnel excavator from another side of the present invention is a center folding mechanism between the front body and the rear body of the tunnel excavator, and is the inside of the rear end portion of the front body and the rear end portion thereof. Located on the front side of a plurality of sealing chambers formed between three or more center-folded seals arranged between the front end of the rear body and the three or more center-folded seals. An oil supply device that forms a closed loop between at least one seal chamber and an oil tank to supply oil to the at least one seal chamber, and supplies grease to the remaining seal chambers of the plurality of seal chambers. A grease supply device, a first pressure sensor that detects the pressure around the center bending mechanism, and a second pressure sensor that detects the pressure in the rearmost sealing chamber located at the rearmost of the plurality of sealing chambers. A control device for controlling the grease supply device is provided, and the control device includes the grease supply device so that the pressure detected by the second pressure sensor is higher than the pressure detected by the first pressure sensor. The oil supply device keeps the pressure of the frontmost seal chamber located at the front of the plurality of seal chambers at a set value lower than the pressure detected by the first pressure sensor. It is characterized by being configured in.

上記の構成によれば、最前方シール室の圧力が中折れ機構の周囲の圧力よりも低く保たれるので、最前段の中折れシールが負担する差圧を低減することができる。これにより、最前段の中折れシールが反転することを防止することができる。 According to the above configuration, since the pressure in the frontmost seal chamber is kept lower than the pressure around the center-folding mechanism, the differential pressure borne by the front-stage center-folding seal can be reduced. As a result, it is possible to prevent the middle-folded seal in the front stage from being inverted.

本発明によれば、最前段の中折れシールが負担する差圧を低減することができる。 According to the present invention, it is possible to reduce the differential pressure borne by the middle-folded seal in the front stage.

本発明の第1実施形態に係る中折れ機構を含むトンネル掘削機の側面図である。It is a side view of the tunnel excavator including the center folding mechanism which concerns on 1st Embodiment of this invention. 第1実施形態の中折れ機構を示す、トンネル掘削機の一部の断面図である。It is sectional drawing of a part of the tunnel excavator which shows the center bending mechanism of 1st Embodiment. 本発明の第2実施形態に係る中折れ機構を示す、トンネル掘削機の一部の断面図である。It is sectional drawing of a part of the tunnel excavator which shows the center folding mechanism which concerns on 2nd Embodiment of this invention.

(第1実施形態)
図2に、本発明の第1実施形態に係る中折れ機構12を示し、図1に、その中折れ機構12を含むトンネル掘削機1を示す。例えば、トンネル掘削機1は内部でセグメントを組み立てるシールド掘進機である。ただし、本発明は、シールド掘進機以外のトンネル掘削機にも適用可能である。
(First Embodiment)
FIG. 2 shows a center-folding mechanism 12 according to the first embodiment of the present invention, and FIG. 1 shows a tunnel excavator 1 including the center-folding mechanism 12. For example, the tunnel excavator 1 is a shield excavator that assembles segments internally. However, the present invention is also applicable to tunnel excavators other than shield excavators.

図1に示すように、トンネル掘削機1は、地山を掘削するカッターヘッド2と、このカッターヘッド2を回転可能に支持する掘削機本体10を含む。掘削機本体10は、中折れ式のものであり、前胴3と後胴4とに分けられた管状の外殻11を含む。そして、前胴3と後胴4の間に中折れ機構12が設けられている。 As shown in FIG. 1, the tunnel excavator 1 includes a cutter head 2 for excavating a ground and an excavator main body 10 for rotatably supporting the cutter head 2. The excavator main body 10 is a break-action type, and includes a tubular outer shell 11 divided into a front body 3 and a rear body 4. A center folding mechanism 12 is provided between the front body 3 and the rear body 4.

図示は省略するが、前胴3の前側開口は隔壁により閉塞され、この隔壁とカッターヘッド2との間にはカッターチャンバーが形成されている。 Although not shown, the front opening of the front body 3 is closed by a partition wall, and a cutter chamber is formed between the partition wall and the cutter head 2.

中折れ機構12では、図2に示すように、前胴3の後端部31の内側に後胴4の前端部41が位置し、前胴3の後端部31と後胴4の前端部41とが重なり合っている。前胴3の後端部31の内側面および後胴4の前端部41の外側面は、本実施形態では断面が直線の筒状であるが、断面が曲線の球状であってもよい。 In the center folding mechanism 12, as shown in FIG. 2, the front end 41 of the rear torso 4 is located inside the rear end 31 of the front torso 3, and the rear end 31 of the front torso 3 and the front end of the rear torso 4 are located. It overlaps with 41. The inner surface of the rear end portion 31 of the front body 3 and the outer surface of the front end portion 41 of the rear body 4 have a cylindrical shape with a straight cross section in the present embodiment, but the cross section may be a curved spherical shape.

前胴3の後端部31と後胴4の前端部41との間には、前後方向に並ぶように3つ以上の環状の中折れシール5が配置されている。本実施形態では、中折れシール5の数が4つである。 Between the rear end portion 31 of the front cylinder 3 and the front end portion 41 of the rear cylinder 4, three or more annular center-folding seals 5 are arranged so as to line up in the front-rear direction. In the present embodiment, the number of the center-folded seals 5 is four.

本実施形態では、各中折れシール5としてシングルリップシールが用いられている。ただし、いつくつかのまたは全てのシングルリップシールに変えて、多段リップシールが用いられてもよい。多段リップシールが用いられる場合、各リップ部が中折れシール5である。 In this embodiment, a single lip seal is used as each center-folded seal 5. However, multi-stage lip seals may be used in place of some or all single lip seals. When a multi-stage lip seal is used, each lip portion is a center-folded seal 5.

本実施形態では、中折れシール5がシール押さえ51によって前胴3の後端部31に取り付けられており、当該中折れシール5の弾性力によって後胴4の前端部41に押圧されている。ただし、本実施形態とは反対に、中折れシール5がシール押さえ51によって後胴4の前端部41に取り付けられており、当該中折れシール5の弾性力によって前胴3の後端部31に押圧されてもよい。 In the present embodiment, the center-folding seal 5 is attached to the rear end portion 31 of the front body 3 by the seal retainer 51, and is pressed against the front end portion 41 of the rear body 4 by the elastic force of the center-folding seal 5. However, contrary to the present embodiment, the center-folding seal 5 is attached to the front end portion 41 of the rear body 4 by the seal retainer 51, and the elastic force of the center-folding seal 5 is applied to the rear end portion 31 of the front body 3. It may be pressed.

4つの中折れシール5の間には、3つのシール室が形成されている。3つのシール室は、最も後方に位置する最後方シール室61と、最も前方に位置する最前方シール室63と、中間に位置する中間シール室62である。 Three seal chambers are formed between the four center-folded seals 5. The three sealing chambers are the rearmost sealing chamber 61 located at the rearmost position, the frontmost sealing chamber 63 located at the frontmost position, and the intermediate sealing chamber 62 located at the middle.

本実施形態では、最後方シール室61、中間シール室62および最前方シール室63に、半固体のグリスが充填されている。グリスは、グリス供給装置7によって最後方シール室61、中間シール室62および最前方シール室63へ供給される。 In the present embodiment, the rearmost seal chamber 61, the intermediate seal chamber 62, and the frontmost seal chamber 63 are filled with semi-solid grease. The grease is supplied to the rearmost seal chamber 61, the intermediate seal chamber 62, and the frontmost seal chamber 63 by the grease supply device 7.

グリス供給装置7は、最後方シール室61、中間シール室62および最前方シール室63のそれぞれへのグリス供給量を調整可能に構成されている。本実施形態では、グリス供給装置7が1つのポンプ73を含む。ただし、グリス供給装置7の構成はこれに限られるものではなく、適宜変更可能である。 The grease supply device 7 is configured so that the amount of grease supplied to each of the rearmost seal chamber 61, the intermediate seal chamber 62, and the frontmost seal chamber 63 can be adjusted. In this embodiment, the grease supply device 7 includes a pump 73. However, the configuration of the grease supply device 7 is not limited to this, and can be changed as appropriate.

具体的に、ポンプ73は吸入路72によりグリスタンク71と接続されている。また、ポンプ73は、供給路74により最後方シール室61と接続され、供給路75により中間シール室62と接続され、供給路76により最前方シール室63と接続されている。供給路74〜76の上流側部分は互いに合流して共通の流路となっている。 Specifically, the pump 73 is connected to the grease tank 71 by a suction path 72. Further, the pump 73 is connected to the rearmost seal chamber 61 by the supply path 74, is connected to the intermediate seal chamber 62 by the supply path 75, and is connected to the frontmost seal chamber 63 by the supply path 76. The upstream portions of the supply paths 74 to 76 merge with each other to form a common flow path.

供給路74〜76には開閉弁77〜79がそれぞれ設けられている。これらの開閉弁77〜79および上述したポンプ73は、制御装置8によって制御される。ただし、図2では、図面の簡略化のために一部の信号線のみを描いている。 On-off valves 77 to 79 are provided in the supply paths 74 to 76, respectively. These on-off valves 77 to 79 and the pump 73 described above are controlled by the control device 8. However, in FIG. 2, only some signal lines are drawn for the sake of simplification of the drawing.

例えば、制御装置8は、ROMやRAMなどのメモリと、HDDなどのストレージと、CPUを有するコンピュータであり、ROMまたはHDDに記憶されたプログラムがCPUにより実行される。 For example, the control device 8 is a computer having a memory such as a ROM or a RAM, a storage such as an HDD, and a CPU, and a program stored in the ROM or the HDD is executed by the CPU.

制御装置8は、中折れ機構12の周囲の圧力P0を検出する圧力センサ80(本発明の第1圧力センサに相当)と電気的に接続されている。上述したカッターチャンバーの圧力は、中折れ機構12の周囲の圧力P0とほぼ等しい。このため、本実施形態では、圧力センサ80が、上述した前胴3の前側開口を閉塞する隔壁に設けられ、カッターチャンバーの圧力Pcを中折れ機構12の周囲の圧力P0として検出する。ただし、圧力センサ80は、中折れ機構12の周囲の圧力P0を直接的に検出するために、前胴3の後端部31または後胴4の前端部41に設けられてもよい。 The control device 8 is electrically connected to a pressure sensor 80 (corresponding to the first pressure sensor of the present invention) that detects the pressure P0 around the center bending mechanism 12. The pressure of the cutter chamber described above is substantially equal to the pressure P0 around the center bending mechanism 12. Therefore, in the present embodiment, the pressure sensor 80 is provided on the partition wall that closes the front opening of the front body 3 described above, and the pressure Pc of the cutter chamber is detected as the pressure P0 around the center bending mechanism 12. However, the pressure sensor 80 may be provided at the rear end 31 of the front body 3 or the front end 41 of the rear body 4 in order to directly detect the pressure P0 around the center bending mechanism 12.

さらに、制御装置8は、最後方シール室61の圧力P1を検出する圧力センサ81(本発明の第2圧力センサに相当)、中間シール室62の圧力P2を検出する圧力センサ82、および最前方シール室63の圧力P3を検出する圧力センサ83(本発明の第3圧力センサに相当)とも電気的に接続されている。 Further, the control device 8 includes a pressure sensor 81 (corresponding to the second pressure sensor of the present invention) that detects the pressure P1 of the rearmost seal chamber 61, a pressure sensor 82 that detects the pressure P2 of the intermediate seal chamber 62, and the frontmost. It is also electrically connected to a pressure sensor 83 (corresponding to the third pressure sensor of the present invention) that detects the pressure P3 of the seal chamber 63.

本実施形態では、圧力センサ81が開閉弁77の下流側で供給路74に設けられている。ただし、圧力センサ81は、例えば、後胴4の前端部41における最後方シール室61に面する部分に設けられてもよい。 In this embodiment, the pressure sensor 81 is provided in the supply path 74 on the downstream side of the on-off valve 77. However, the pressure sensor 81 may be provided, for example, in a portion of the front end portion 41 of the rear body 4 facing the rearmost seal chamber 61.

同様に、圧力センサ82は開閉弁78の下流側で供給路75に設けられており、圧力センサ83は開閉弁79の下流側で供給路76に設けられている。ただし、圧力センサ82は、例えば、後胴4の前端部41における中間シール室62に面する部分に設けられてもよい。同様に、圧力センサ83は、例えば、後胴4の前端部41における最前方シール室63に面する部分に設けられてもよい。 Similarly, the pressure sensor 82 is provided in the supply path 75 on the downstream side of the on-off valve 78, and the pressure sensor 83 is provided in the supply path 76 on the downstream side of the on-off valve 79. However, the pressure sensor 82 may be provided, for example, in a portion of the front end portion 41 of the rear body 4 facing the intermediate seal chamber 62. Similarly, the pressure sensor 83 may be provided, for example, in a portion of the front end portion 41 of the rear body 4 facing the frontmost seal chamber 63.

制御装置8は、圧力センサ80〜83で検出される圧力Pc(P0),P1、P2,P3に基づいて、以下の関係が成立するようにグリス供給装置7を制御する。なお、以下のPaは大気圧(機内の圧力)である。
Pa<P3≦P2≦P1>Pc
The control device 8 controls the grease supply device 7 so that the following relationship is established based on the pressures Pc (P0), P1, P2, and P3 detected by the pressure sensors 80 to 83. The following Pa is atmospheric pressure (pressure inside the aircraft).
Pa <P3 ≤ P2 ≤ P1> Pc

すなわち、最後方シール室61に関しては、制御装置8は、最後方シール室61の圧力P1がカッターチャンバーの圧力Pc(中折れ機構12の周囲の圧力P0)よりも高くなるようにポンプ73を間欠的に稼働させ、ポンプ73の稼働に合わせて開閉弁77を開く。 That is, with respect to the rearmost seal chamber 61, the control device 8 intermittently inserts the pump 73 so that the pressure P1 of the rearmost seal chamber 61 is higher than the pressure Pc of the cutter chamber (pressure P0 around the center bending mechanism 12). The on-off valve 77 is opened according to the operation of the pump 73.

ポンプ73の間欠的な稼働に関し、制御装置8は、圧力センサ81で検出される圧力が下限(>Pc)を下回ったときに、ポンプ73が所定量のグリスを吐出するだけポンプ73を稼働させてもよい。あるいは、制御装置8は、圧力センサ81で検出される圧力が下限を下回ったときに、圧力センサ81で検出される圧力が上限に至るまでポンプ73を稼働させてもよい。 Regarding the intermittent operation of the pump 73, the control device 8 operates the pump 73 as much as the pump 73 discharges a predetermined amount of grease when the pressure detected by the pressure sensor 81 falls below the lower limit (> Pc). You may. Alternatively, the control device 8 may operate the pump 73 until the pressure detected by the pressure sensor 81 reaches the upper limit when the pressure detected by the pressure sensor 81 falls below the lower limit.

中間シール室62に関しては、制御装置8は、中間シール室62の圧力P2が最後方シール室61の圧力P1以下となるようにポンプ73を間欠的に稼働させ、ポンプ73の稼働に合わせて開閉弁78を開く。 Regarding the intermediate seal chamber 62, the control device 8 intermittently operates the pump 73 so that the pressure P2 of the intermediate seal chamber 62 becomes equal to or less than the pressure P1 of the rearmost seal chamber 61, and opens and closes according to the operation of the pump 73. Open valve 78.

ポンプ73の間欠的な稼働に関し、制御装置8は、圧力センサ82で検出される圧力が下限を下回ったときに、ポンプ73が所定量のグリスを吐出するだけポンプ73を稼働させてもよい。あるいは、制御装置8は、圧力センサ82で検出される圧力が下限を下回ったときに、圧力センサ82で検出される圧力が上限に至るまでポンプ73を稼働させてもよい。 Regarding the intermittent operation of the pump 73, the control device 8 may operate the pump 73 as much as the pump 73 discharges a predetermined amount of grease when the pressure detected by the pressure sensor 82 falls below the lower limit. Alternatively, the control device 8 may operate the pump 73 until the pressure detected by the pressure sensor 82 reaches the upper limit when the pressure detected by the pressure sensor 82 falls below the lower limit.

最前方シール室63に関しては、制御装置8は、最前方シール室63の圧力P3が大気圧Paよりも高く、かつ、中間シール室52の圧力P2以下となるようにポンプ73を間欠的に稼働させ、ポンプ73の稼働に合わせて開閉弁79を開く。言うまでもないが、中間シール室52の圧力P2が最後方シール室61の圧力P1と等しいときは、最前方シール室63の圧力P3は最後方シール室61の圧力P1以下である。 Regarding the frontmost seal chamber 63, the control device 8 intermittently operates the pump 73 so that the pressure P3 of the frontmost seal chamber 63 is higher than the atmospheric pressure Pa and is equal to or less than the pressure P2 of the intermediate seal chamber 52. Then, the on-off valve 79 is opened according to the operation of the pump 73. Needless to say, when the pressure P2 of the intermediate seal chamber 52 is equal to the pressure P1 of the rearmost seal chamber 61, the pressure P3 of the frontmost seal chamber 63 is equal to or less than the pressure P1 of the rearmost seal chamber 61.

ポンプ73の間欠的な稼働に関し、制御装置8は、圧力センサ83で検出される圧力が下限(>Pa)を下回ったときに、ポンプ73が所定量のグリスを吐出するだけポンプ73を稼働させてもよい。あるいは、制御装置8は、圧力センサ83で検出される圧力が下限を下回ったときに、圧力センサ83で検出される圧力が上限に至るまでポンプ73を稼働させてもよい。 Regarding the intermittent operation of the pump 73, the control device 8 operates the pump 73 as much as the pump 73 discharges a predetermined amount of grease when the pressure detected by the pressure sensor 83 falls below the lower limit (> Pa). You may. Alternatively, the control device 8 may operate the pump 73 until the pressure detected by the pressure sensor 83 reaches the upper limit when the pressure detected by the pressure sensor 83 falls below the lower limit.

なお、最前方シール室63の圧力P3は、ゲージ圧で、カッターチャンバーの圧力Pc(中折れ機構12の周囲の圧力P0)の半分以上であることが望ましい。 It is desirable that the pressure P3 of the frontmost sealing chamber 63 is a gauge pressure, which is at least half of the pressure Pc of the cutter chamber (pressure P0 around the center bending mechanism 12).

以上説明したように、本実施形態の中折れ機構12では、最前方シール室63の圧力P3が最後方シール室61の圧力P1以下に保たれるので、最前段の中折れシール5が負担する差圧を低減することができる。これにより、最前段の中折れシール5が反転することを防止することができる。 As described above, in the center-folding mechanism 12 of the present embodiment, the pressure P3 of the frontmost seal chamber 63 is maintained below the pressure P1 of the rearmost seal chamber 61, so that the center-folding seal 5 in the frontmost stage bears the burden. The differential pressure can be reduced. As a result, it is possible to prevent the middle-folded seal 5 in the front stage from being inverted.

(第2実施形態)
図3に、本発明の第2実施形態に係る中折れ機構13を示す。なお、本実施形態において、第1実施形態と同一構成要素には同一符号を付し、重複した説明は省略する。
(Second Embodiment)
FIG. 3 shows the center folding mechanism 13 according to the second embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted.

本実施形態では、最前方シール室63に液体のオイルが充填され、中間シール室62および最後方シール室61にグリスが充填されている。そして、最前方シール室63にはオイル供給装置9からオイルが供給され、中間シール室62および最前方シール室63にはグリス供給装置7からグリスが供給される。 In the present embodiment, the frontmost seal chamber 63 is filled with liquid oil, and the intermediate seal chamber 62 and the rearmost seal chamber 61 are filled with grease. Then, oil is supplied from the oil supply device 9 to the frontmost seal chamber 63, and grease is supplied from the grease supply device 7 to the intermediate seal chamber 62 and the frontmost seal chamber 63.

ただし、中間シール室62には、グリスではなくオイルが充填されてもよい。この場合、オイル供給装置9が最前方シール室63および中間シール室62(前側に位置する2つのシール室)へオイルを供給し、グリス供給装置7が最後方シール室61(残りのシール室)へグリスを供給する。 However, the intermediate seal chamber 62 may be filled with oil instead of grease. In this case, the oil supply device 9 supplies oil to the frontmost seal chamber 63 and the intermediate seal chamber 62 (two seal chambers located on the front side), and the grease supply device 7 supplies the rearmost seal chamber 61 (the remaining seal chamber). Supply hegris.

オイル供給装置9は、最前方シール室63とオイルタンク91との間で閉ループを形成する。具体的に、オイル供給装置9は、吸入路92によりオイルタンク91と接続されたポンプ93を含み、このポンプ93が供給路94により最前方シール室63と接続されている。 The oil supply device 9 forms a closed loop between the frontmost seal chamber 63 and the oil tank 91. Specifically, the oil supply device 9 includes a pump 93 connected to the oil tank 91 by a suction path 92, and the pump 93 is connected to the frontmost seal chamber 63 by a supply path 94.

本実施形態では、供給路94から排出路95が分岐しており、この排出路95がオイルタンク91へつながっている。排出路95には、開度が電気的に変更可能な圧力調整弁96が設けられている。ただし、排出路95は、必ずしも供給路94から分岐する必要はなく、最前方シール室63と直接的に連通してもよい。 In the present embodiment, the discharge path 95 branches from the supply path 94, and this discharge path 95 is connected to the oil tank 91. The discharge passage 95 is provided with a pressure regulating valve 96 whose opening degree can be electrically changed. However, the discharge path 95 does not necessarily have to branch from the supply path 94, and may directly communicate with the frontmost seal chamber 63.

制御装置8は、第1実施形態と同様に、圧力センサ81で検出される最後方シール室61の圧力P1が圧力センサ80で検出されるカッターチャンバーの圧力Pc(中折れ機構13の周囲の圧力P0)よりも高くなるようにグリス供給装置7を制御する(P1>Pc)。なお、本実施形態では、中間シール室62の圧力P2は、最後方シール室61の圧力P1以下であってもよいし(P2≦P1)、最後方シール室61の圧力P1以上であってもよい(P2≧P1)。 In the control device 8, similarly to the first embodiment, the pressure P1 of the rearmost seal chamber 61 detected by the pressure sensor 81 is the pressure Pc of the cutter chamber detected by the pressure sensor 80 (the pressure around the center bending mechanism 13). The grease supply device 7 is controlled so as to be higher than P0) (P1> Pc). In the present embodiment, the pressure P2 of the intermediate seal chamber 62 may be equal to or less than the pressure P1 of the rearmost seal chamber 61 (P2 ≦ P1), or may be equal to or higher than the pressure P1 of the rearmost seal chamber 61. Good (P2 ≧ P1).

オイル供給装置9は、最前方シール室63の圧力P3が圧力センサ80でカッターチャンバーの圧力Pc(中折れ機構13の周囲の圧力P0)よりも低い設定値Psに保たれるように構成されている。本実施形態では、制御装置8が、圧力センサ83で検出される最前方シール室63の圧力P3が設定値Psに保たれるように圧力調整弁96を制御する(P3=Ps<Pc)。 The oil supply device 9 is configured such that the pressure P3 of the frontmost seal chamber 63 is maintained at a set value Ps lower than the pressure Pc of the cutter chamber (pressure P0 around the center bending mechanism 13) by the pressure sensor 80. There is. In the present embodiment, the control device 8 controls the pressure adjusting valve 96 so that the pressure P3 of the frontmost seal chamber 63 detected by the pressure sensor 83 is maintained at the set value Ps (P3 = Ps <Pc).

設定値Psは、カッターチャンバーの圧力Pcに応じて変化するように、ゲージ圧で、カッターチャンバーの圧力Pcに所定割合(例えば、40〜60%)を掛け合わせて算出されてもよい。あるいは、設定値Psは、想定されるカッターチャンバーの最小圧力よりも小さな固定値であってもよい。 The set value Ps may be calculated by multiplying the pressure Pc of the cutter chamber by a predetermined ratio (for example, 40 to 60%) with a gauge pressure so as to change according to the pressure Pc of the cutter chamber. Alternatively, the set value Ps may be a fixed value smaller than the assumed minimum pressure of the cutter chamber.

本実施形態では、最前方シール室63の圧力P3がカッターチャンバーの圧力pc(中折れ機構13の周囲の圧力P0)よりも低く保たれるので、最前段の中折れシール5が負担する差圧を低減することができる。これにより、最前段の中折れシール5が反転することを防止することができる。 In the present embodiment, the pressure P3 of the frontmost seal chamber 63 is kept lower than the pressure pc of the cutter chamber (pressure P0 around the center folding mechanism 13), so that the differential pressure borne by the frontmost bending seal 5 is borne. Can be reduced. As a result, it is possible to prevent the middle-folded seal 5 in the front stage from being inverted.

なお、圧力調整弁96の代わりに電磁リリーフ弁が用いられ、この電磁リリーフ弁のリリーフ圧がカッターチャンバーの圧力Pcよりも低くなるように制御装置8により調整されてもよい。この場合、圧力センサ83は不要である。 An electromagnetic relief valve is used instead of the pressure adjusting valve 96, and the relief pressure of the electromagnetic relief valve may be adjusted by the control device 8 so as to be lower than the pressure Pc of the cutter chamber. In this case, the pressure sensor 83 is unnecessary.

(その他の実施形態)
本発明は上述した実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変形が可能である。
(Other embodiments)
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

例えば、中折れシール5の数は、3つであってもよいし、5つ以上であってもよい。 For example, the number of the center-folded seals 5 may be three or five or more.

1 トンネル掘削機
12,13 中折れ機構
3 前胴
31 後端部
4 後胴
41 前端部
5 中折れシール
61 最後方シール室
63 最前方シール室
7 グリス供給装置
8 制御装置
80 圧力センサ(第1圧力センサ)
81 圧力センサ(第2圧力センサ)
83 圧力センサ(第3圧力センサ)
9 オイル供給装置
91 オイルタンク
1 Tunnel excavator 12, 13 Center bending mechanism 3 Front body 31 Rear end 4 Rear body 41 Front end 5 Center folding seal 61 Rearmost sealing room 63 Frontmost sealing room 7 Griss supply device 8 Control device 80 Pressure sensor (1st Pressure sensor)
81 Pressure sensor (second pressure sensor)
83 Pressure sensor (3rd pressure sensor)
9 Oil supply device 91 Oil tank

Claims (2)

トンネル掘削機の前胴と後胴の間の中折れ機構であって、
前記前胴の後端部とこの後端部の内側に位置する前記後胴の前端部との間に配置される3つ以上の中折れシールと、
前記3つ以上の中折れシールの間に形成された複数のシール室へグリスを供給するグリス供給装置と、
前記中折れ機構の周囲の圧力を検出する第1圧力センサと、
前記複数のシール室のうちの最も後方に位置する最後方シール室の圧力を検出する第2圧力センサと、
前記複数のシール室のうちの最も前方に位置する最前方シール室の圧力を検出する第3圧力センサと、
前記グリス供給装置を制御する制御装置と、を備え、
前記制御装置は、前記第2圧力センサで検出される圧力が前記第1圧力センサで検出される圧力よりも高くなるとともに、前記第3圧力センサで検出される圧力が前記第2圧力センサで検出される圧力以下となるように前記グリス供給装置を制御する、トンネル掘削機の中折れ機構。
It is a folding mechanism between the front and rear fuselage of the tunnel excavator.
Three or more center-folded seals arranged between the rear end of the front torso and the front end of the rear torso located inside the rear end.
A grease supply device that supplies grease to a plurality of seal chambers formed between the three or more middle-folded seals, and a grease supply device.
A first pressure sensor that detects the pressure around the center bending mechanism, and
A second pressure sensor that detects the pressure of the rearmost sealing chamber located at the rearmost of the plurality of sealing chambers, and
A third pressure sensor that detects the pressure of the frontmost seal chamber located at the frontmost of the plurality of seal chambers, and
A control device for controlling the grease supply device is provided.
In the control device, the pressure detected by the second pressure sensor becomes higher than the pressure detected by the first pressure sensor, and the pressure detected by the third pressure sensor is detected by the second pressure sensor. A center-breaking mechanism of a tunnel excavator that controls the grease supply device so that the pressure becomes less than or equal to the pressure to be applied.
トンネル掘削機の前胴と後胴の間の中折れ機構であって、
前記前胴の後端部とこの後端部の内側に位置する前記後胴の前端部との間に配置される3つ以上の中折れシールと、
前記3つ以上の中折れシールの間に形成された複数のシール室のうちの前側に位置する少なくとも1つのシール室とオイルタンクとの間で閉ループを形成し、前記少なくとも1つのシール室へオイルを供給するオイル供給装置と、
前記複数のシール室のうちの残りのシール室へグリスを供給するグリス供給装置と、
前記中折れ機構の周囲の圧力を検出する第1圧力センサと、
前記複数のシール室のうちの最も後方に位置する最後方シール室の圧力を検出する第2圧力センサと、
前記グリス供給装置を制御する制御装置と、を備え、
前記制御装置は、前記第2圧力センサで検出される圧力が前記第1圧力センサで検出される圧力よりも高くなるように前記グリス供給装置を制御し、
前記オイル供給装置は、前記複数のシール室のうちの最も前方に位置する最前方シール室の圧力が前記第1圧力センサで検出される圧力よりも低い設定値に保たれるように構成されている、トンネル掘削機の中折れ機構。
It is a folding mechanism between the front and rear fuselage of the tunnel excavator.
Three or more center-folded seals arranged between the rear end of the front torso and the front end of the rear torso located inside the rear end.
A closed loop is formed between the oil tank and at least one seal chamber located on the front side of the plurality of seal chambers formed between the three or more center-folded seals, and oil is supplied to the at least one seal chamber. Oil supply device and
A grease supply device that supplies grease to the remaining seal chambers of the plurality of seal chambers, and
A first pressure sensor that detects the pressure around the center bending mechanism, and
A second pressure sensor that detects the pressure of the rearmost sealing chamber located at the rearmost of the plurality of sealing chambers, and
A control device for controlling the grease supply device is provided.
The control device controls the grease supply device so that the pressure detected by the second pressure sensor becomes higher than the pressure detected by the first pressure sensor.
The oil supply device is configured so that the pressure of the frontmost seal chamber located at the front of the plurality of seal chambers is maintained at a set value lower than the pressure detected by the first pressure sensor. There is a folding mechanism of the tunnel excavator.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02147795A (en) * 1988-11-29 1990-06-06 Mitsubishi Heavy Ind Ltd Tail sill part filler injection method for shield excavator
JPH02183092A (en) * 1989-01-09 1990-07-17 Hitachi Constr Mach Co Ltd Method and device for feeding grease to cutter seal of shield excavator
JPH09125881A (en) * 1995-10-30 1997-05-13 Kajima Corp Tail seal injector of shield machine and tail seal injection material
JP2007303134A (en) * 2006-05-10 2007-11-22 Tohoku Oshima Kogyo Kk Sealing device of buckling shield machine
JP2017101487A (en) * 2015-12-03 2017-06-08 大成建設株式会社 Back-filling material permeation prevention structure
JP2018076752A (en) * 2016-11-11 2018-05-17 日本シビックコンサルタント株式会社 Tunnel drilling machine and control method of the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02147795A (en) * 1988-11-29 1990-06-06 Mitsubishi Heavy Ind Ltd Tail sill part filler injection method for shield excavator
JPH02183092A (en) * 1989-01-09 1990-07-17 Hitachi Constr Mach Co Ltd Method and device for feeding grease to cutter seal of shield excavator
JPH09125881A (en) * 1995-10-30 1997-05-13 Kajima Corp Tail seal injector of shield machine and tail seal injection material
JP2007303134A (en) * 2006-05-10 2007-11-22 Tohoku Oshima Kogyo Kk Sealing device of buckling shield machine
JP2017101487A (en) * 2015-12-03 2017-06-08 大成建設株式会社 Back-filling material permeation prevention structure
JP2018076752A (en) * 2016-11-11 2018-05-17 日本シビックコンサルタント株式会社 Tunnel drilling machine and control method of the same

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