JPH1018752A - Drilling control device for hydraulic crawler drill - Google Patents
Drilling control device for hydraulic crawler drillInfo
- Publication number
- JPH1018752A JPH1018752A JP17034696A JP17034696A JPH1018752A JP H1018752 A JPH1018752 A JP H1018752A JP 17034696 A JP17034696 A JP 17034696A JP 17034696 A JP17034696 A JP 17034696A JP H1018752 A JPH1018752 A JP H1018752A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure
- switching
- pilot
- feed mechanism
- 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
- 238000005553 drilling Methods 0.000 title claims abstract description 48
- 230000007246 mechanism Effects 0.000 claims abstract description 134
- 230000001105 regulatory effect Effects 0.000 claims abstract description 11
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 239000011435 rock Substances 0.000 claims description 37
- 239000003921 oil Substances 0.000 description 54
- 230000007935 neutral effect Effects 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Earth Drilling (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、さく孔中に回転抵
抗が増加したとき送り機構の推力を低減させるように制
御することのできる油圧クローラドリルのさく孔制御装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling control device for a hydraulic crawler drill which can control the thrust of a feed mechanism to be reduced when rotational resistance increases during drilling.
【０００２】[0002]
【従来の技術】一般に、油圧クローラドリルは、図２に
示すように、油圧で駆動される打撃機構１と回転機構２
とを有するさく岩機３、及びさく岩機３の送り機構４を
備えており、打撃機構１がさく孔用のロッドに打撃を与
え、回転機構２がさく孔用のロッドに回転を与えると共
に、送り機構４がさく孔用のロッドに推力を与えて岩盤
にさく孔する。2. Description of the Related Art Generally, as shown in FIG. 2, a hydraulic crawler drill has a striking mechanism 1 and a rotating mechanism 2 driven by hydraulic pressure.
A rock drill 3 having a rock drill, and a feed mechanism 4 for the rock drill 3. The striking mechanism 1 hits the rod for drilling, the rotating mechanism 2 rotates the rod for drilling, and Then, the feed mechanism 4 applies thrust to the drilling rod to drill the rock.
【０００３】従来、この打撃機構１、回転機構２、及び
送り機構４は、れぞれ独立した油圧回路で駆動されてい
る。そして、この油圧クローラドリルのさく孔制御は、
オペレータが打撃操作用切換弁（図示略）、回転操作用
切換弁（図示略）、送り操作用切換弁（図示略）を手動
操作して、打撃機構１の高圧管路ＰＨ、低圧管路ＰＬ、
回転機構２の正転管路ＲＦ、逆転管路ＲＲ、送り機構の
前進管路ＦＦ、後退管路ＦＲへの圧油の供給を切換える
ことにより行われる。Conventionally, the striking mechanism 1, the rotating mechanism 2, and the feed mechanism 4 are driven by independent hydraulic circuits. And the drilling control of this hydraulic crawler drill is
The operator manually operates the switching valve for striking operation (not shown), the switching valve for rotation operation (not shown), and the switching valve for feed operation (not shown), and the high pressure line PH and the low pressure line PL of the striking mechanism 1 are operated. ,
This is performed by switching the supply of the pressure oil to the forward pipeline RF, the reverse pipeline RR of the rotating mechanism 2, the forward pipeline FF of the feed mechanism, and the reverse pipeline FR.
【０００４】油圧クローラドリルは、一般にドリルジャ
ンボと比べると長孔をさく孔するために複数のロッドの
継ぎ足し、回収を行う必要があるが、このロッドの継ぎ
足し、回収作業は煩雑であるので、ロッドチェンジャが
装備されており、近年ロッドの継ぎ足し、回収作業の自
動化が進められている。そのため、ロッドの継ぎ足し、
回収作業のうちロッドのねじ切り離し工程において、さ
く岩機３をロッドの微速逆回転動作に同期して、ねじピ
ッチ分後退させるために後退速度を低速に制御する必要
がある。In general, a hydraulic crawler drill needs to add and collect a plurality of rods in order to form a long hole as compared with a drill jumbo. It is equipped with a changer, and in recent years, the addition of rods and the automation of collection work have been advanced. Because of that, the addition of the rod,
In the rod cutting-off step of the recovery operation, it is necessary to control the retreat speed to a low speed in order to retreat the rock drill 3 by the screw pitch in synchronization with the slow reverse rotation of the rod.
【０００５】また、油圧クローラドリルは１回のさく孔
長が長いので、非さく孔状態でさく岩機３がガイドシェ
ル上を移動する時間が大となりサイクルタイムが長くな
る。そこで、非さく孔状態でさく岩機３がガイドシェル
上を移動する場合にはさく孔状態よりも速く移動できる
ように早送り制御しなければならない。また、孔が深い
ため孔内にくり粉がつまり易く孔掃除を頻繁に行う必要
がある場合が多く、その際には移動速度を高速とする早
送り制御によって孔掃除の作業時間を短縮することがで
きる。[0005] Further, since the hydraulic crawler drill has a long drilling length, the rock drill 3 moves on the guide shell in a non-drilling state, so that the cycle time becomes longer. Therefore, when the rock drill 3 moves on the guide shell in the non-drilling state, it is necessary to perform fast-forward control so that the rock drill 3 can move faster than the drilling state. In addition, since the hole is deep, the dust tends to be clogged in the hole and it is often necessary to clean the hole frequently.In this case, the fast-moving control that increases the moving speed can shorten the hole cleaning work time. it can.
【０００６】よって、油圧クローラドリルの送り制御と
しては、通常のさく孔状態の送り速度、ロッドの継ぎ足
し、回収作業におけるねじ切り離し工程の低速後退速
度、さらに非さく孔状態における早送り速度が必要に応
じて切換えられ、適切に制御されなければならない。Accordingly, as the feed control of the hydraulic crawler drill, a feed speed in a normal drilling state, a slow retreating speed in a screw cutting step in a rod adding and collecting operation, and a rapid feeding speed in a non-drilling state are required as needed. Must be switched and properly controlled.
【０００７】このために、油圧クローラドリルの送り機
構４の油圧回路では、前進管路ＦＦの途中に減圧弁６と
逆止弁７とを並列に設け、後退管路ＦＲと前進管路ＦＦ
との間に後退圧力調整用リリーフ弁８を設け、前進管路
ＦＦと後退管路ＦＲの減圧弁６、後退圧力調整用リリー
フ弁８の下流側に早送り切換用電磁弁９を設け、さら
に、前進管路ＦＦには早送り切換用電磁弁９と並列に前
進流量調整弁１０と逆止弁１１とを設け、後退管路ＦＲ
には早送り切換用電磁弁９と並列に後退流量調整弁１２
と逆止弁１３とを設けている。For this purpose, in the hydraulic circuit of the feed mechanism 4 of the hydraulic crawler drill, the pressure reducing valve 6 and the check valve 7 are provided in parallel in the middle of the forward line FF, and the backward line FR and the forward line FF are provided.
, A relief valve 8 for adjusting the reverse pressure, a pressure reducing valve 6 in the forward line FF and the reverse line FR, and a fast-forward switching electromagnetic valve 9 downstream of the relief valve 8 for adjusting the reverse pressure. A forward flow control valve 10 and a check valve 11 are provided in the forward line FF in parallel with the fast-forward switching electromagnetic valve 9, and the reverse line FR is provided.
The reverse flow control valve 12 is connected in parallel with the fast-forward switching solenoid valve 9.
And a check valve 13.
【０００８】さく岩機３の前進時に送り機構４のフィー
ドモータ５に供給される圧油の圧力は、減圧弁６により
制御される。減圧弁６の作動圧制御ポートには前進圧力
切換用電磁弁１４を介して前進圧力調整用リリーフ弁１
５が接続されており、通常は減圧弁６の出力側圧力を前
進圧力調整用リリーフ弁１５の設定圧力とし、前進圧力
切換用電磁弁１４が切換えられると、減圧弁６の出力側
圧力は減圧弁６本体の最大設定圧力となる。このように
減圧弁６で前進側の圧力を一定制御するのは、さく孔時
の送りを安定させるためである。さく岩機３の後退時に
送り機構４のフィードモータ５に供給される圧油の圧力
は、後退圧力調整用リリーフ弁８の設定圧力の範囲内に
制御される。The pressure of the pressure oil supplied to the feed motor 5 of the feed mechanism 4 when the rock drill 3 advances is controlled by a pressure reducing valve 6. The relief valve 1 for adjusting the forward pressure is connected to the operating pressure control port of the pressure reducing valve 6 via the solenoid valve 14 for switching the forward pressure.
5 is connected, the output pressure of the pressure reducing valve 6 is normally set as the set pressure of the relief valve 15 for adjusting the forward pressure, and when the solenoid valve 14 for switching the forward pressure is switched, the output pressure of the pressure reducing valve 6 is reduced. It becomes the maximum set pressure of the valve 6 body. The reason why the pressure on the forward side is controlled to be constant by the pressure reducing valve 6 is to stabilize the feed during drilling. The pressure of the pressure oil supplied to the feed motor 5 of the feed mechanism 4 when the rock drill 3 retreats is controlled within the range of the set pressure of the relieving pressure adjusting relief valve 8.
【０００９】早送り切換用電磁弁９はノーマルクローズ
であり、通常のさく孔時には、前進管路ＦＦに供給され
た圧油が、減圧弁６から前進流量調整弁１０を通って、
送り機構４のフィードモータ５に供給される。フィード
モータ５からの戻り油は、逆止弁１３で後退流量調整弁
１２をバイパスし、後退管路ＦＲから流出する。このと
きフィードモータ５に供給される圧油の圧力は、減圧弁
６の設定圧力すなわち前進圧力調整用リリーフ弁１５の
設定圧力となり、流量は前進流量調整弁１０の設定流量
となって、さく岩機３には送り機構４によって所定の推
力と前進速度が与えられる。The fast-forward switching solenoid valve 9 is normally closed, and during normal drilling, the pressure oil supplied to the forward pipeline FF passes from the pressure reducing valve 6 through the forward flow control valve 10,
It is supplied to the feed motor 5 of the feed mechanism 4. The return oil from the feed motor 5 bypasses the reverse flow control valve 12 with the check valve 13 and flows out from the reverse line FR. At this time, the pressure of the pressure oil supplied to the feed motor 5 becomes the set pressure of the pressure reducing valve 6, that is, the set pressure of the relief valve 15 for adjusting the forward pressure, and the flow rate becomes the set flow rate of the forward flow rate adjusting valve 10, and The machine 3 is given a predetermined thrust and forward speed by a feed mechanism 4.
【００１０】ロッドの継ぎ足し、回収作業におけるねじ
切り離し工程の低速後退時には、後退管路ＦＲに供給さ
れた圧油が、後退流量調整弁１２を通って、送り機構４
のフィードモータ５に供給される。フィードモータ５か
らの戻り油は、逆止弁１１で前進流量調整弁１０をバイ
パスし、逆止弁７で減圧弁６をバイパスし、前進管路Ｆ
Ｆから流出する。このときフィードモータ５に供給され
る圧油の圧力は、後退圧力調整用リリーフ弁８の設定圧
力となり、流量は後退流量調整弁１２の設定流量となっ
て、さく岩機３には送り機構４によって所定の低速後退
速度が与えられる。At the time of retreating the rod at a low speed during the screw cutting step in the refilling operation and the recovery operation, the pressure oil supplied to the retreat line FR passes through the retreat flow regulating valve 12 and passes through the feed mechanism 4.
Is supplied to the feed motor 5. Return oil from the feed motor 5 bypasses the forward flow control valve 10 by the check valve 11, bypasses the pressure reducing valve 6 by the check valve 7, and
Flows out of F. At this time, the pressure of the pressure oil supplied to the feed motor 5 becomes the set pressure of the relief valve 8 for adjusting the retreat pressure, and the flow rate becomes the set flow rate of the retreat flow adjusting valve 12. Provides a predetermined low retreat speed.
【００１１】非さく孔状態における早送り時には、早送
り切換用電磁弁９と前進圧力切換用電磁弁１４が切換え
られる。早送り前進の際には、前進管路ＦＦに供給され
た圧油が、減圧弁６から早送り切換用電磁弁９を通っ
て、送り機構４のフィードモータ５に供給される。フィ
ードモータ５からの戻り油は、逆止弁１３と早送り切換
用電磁弁９を通って後退管路ＦＲから流出する。このと
きフィードモータ５に供給される圧油の圧力は、減圧弁
６本体の最大設定圧力となり、また、前進流量調整弁１
０を通らないので、流量も最大となって、さく岩機３に
は送り機構４によって大きな推力と高速の前進速度が与
えられる。At the time of fast-forwarding in the non-drilling state, the fast-forward switching solenoid valve 9 and the forward pressure switching solenoid valve 14 are switched. At the time of fast forward movement, the pressure oil supplied to the forward passage FF is supplied to the feed motor 5 of the feed mechanism 4 from the pressure reducing valve 6 through the fast forward switching electromagnetic valve 9. Return oil from the feed motor 5 flows out of the retreat line FR through the check valve 13 and the fast-forward switching electromagnetic valve 9. At this time, the pressure of the pressurized oil supplied to the feed motor 5 becomes the maximum set pressure of the pressure reducing valve 6 main body.
Since it does not pass through zero, the flow rate also becomes maximum, and the rock drill 3 is given a large thrust and a high forward speed by the feed mechanism 4.
【００１２】早送り後退の際には、後退後退管路ＦＲに
供給された圧油が、早送り切換用電磁弁９を通って、送
り機構４のフィードモータ５に供給される。フィードモ
ータ５からの戻り油は、逆止弁１１と早送り切換用電磁
弁９を通り、逆止弁７で減圧弁６をバイパスし、前進管
路ＦＦから流出する。このときフィードモータ５に供給
される圧油の圧力は、後退圧力調整用リリーフ弁８の設
定圧力となり、後退流量調整弁１２を通らないので流量
は最大となって、、さく岩機３には送り機構４によって
高速の後退速度が与えられる。At the time of fast-forward retreat, the pressure oil supplied to the reverse-reverse line FR is supplied to the feed motor 5 of the feed mechanism 4 through the fast-forward switching solenoid valve 9. Return oil from the feed motor 5 passes through the check valve 11 and the fast-forward switching solenoid valve 9, bypasses the pressure reducing valve 6 with the check valve 7, and flows out of the forward pipeline FF. At this time, the pressure of the pressure oil supplied to the feed motor 5 becomes the set pressure of the relieving pressure adjusting relief valve 8 and does not pass through the retreating flow adjusting valve 12, so that the flow rate becomes maximum. The feed mechanism 4 provides a high retreat speed.
【００１３】[0013]
【発明が解決しようとする課題】さく孔作業中には、急
に岩盤の状態が変化し、例えば、軟弱な地層や亀裂、空
洞等に遭遇するような場合がある。このような場合に
は、直ちに送り機構４の推力を低下させるように制御し
ないと孔曲がりを生じ、或いは、繰粉の排出が困難にな
って回転抵抗が増加するため、正常なさく孔が不可能と
なる。ところが、岩盤内部の状態は外部から認識できな
いため、オペレータが岩盤の状態の変化に合わせて適切
に送り機構４を制御することは極めて難しい。During the drilling operation, the condition of the bedrock changes suddenly, and for example, a soft stratum, a crack, a cavity or the like may be encountered. In such a case, if the thrust of the feed mechanism 4 is not immediately reduced so that the thrust of the feed mechanism 4 is not controlled, the bending of the hole occurs, or the discharge of the dust becomes difficult, and the rotation resistance increases. It becomes possible. However, since the state inside the bedrock cannot be recognized from the outside, it is extremely difficult for the operator to appropriately control the feed mechanism 4 according to the change in the state of the bedrock.
【００１４】そこで、油圧さく岩機の回転機構の正転管
路と送り機構の後退管路とを流量調整弁とパイロット切
換弁とを介して接続し、打撃機構作動時にパイロット切
換弁を切換えて正転管路と後退管路とを連通させること
により、岩盤の状態の変化で回転抵抗が増加した場合
に、回転抵抗の増加に伴って自動的に推力を抑制するよ
う制御することのできる油圧さく岩機の送り制御装置が
提案されている（特願平６−３０６６７０号参照）。Therefore, the forward pipeline of the rotary mechanism of the hydraulic rock drill and the backward pipeline of the feed mechanism are connected via a flow control valve and a pilot switching valve, and the pilot switching valve is switched when the striking mechanism is operated. Hydraulic pressure that can be controlled to automatically suppress thrust as the rotational resistance increases when rotational resistance increases due to changes in rock condition by connecting the forward rotation line and the reverse line. A feed control device for a rock drill has been proposed (see Japanese Patent Application No. 6-306670).
【００１５】しかし、この油圧さく岩機の送り制御装置
は、ドリルジャンボでは使用できるが、油圧クローラド
リルでは、前記のごとくロッドチェンジャの装備等によ
り、送り速度の制御が複雑で送り機構に種々の油圧制御
機器が設けられているので、有効に使用できないという
問題があった。However, this hydraulic rock drill feed control device can be used in a drill jumbo. However, in a hydraulic crawler drill, the control of the feed speed is complicated by the provision of a rod changer as described above, and various feed mechanisms are used. Since the hydraulic control device is provided, there is a problem that it cannot be used effectively.
【００１６】本発明は、油圧クローラドリルにおける上
記問題を解決するものであって、さく孔中に回転抵抗が
増加したとき送り機構の推力を低減させるように制御す
ることができ、ロッドの継ぎ足し、回収作業におけるね
じ切り離し工程の低速後退速度、さらに非さく孔状態に
おける早送り速度が必要に応じて切換えられ、適切に制
御することのできる油圧クローラドリルを提供すること
を目的とする。The present invention solves the above-mentioned problem in the hydraulic crawler drill, and can control so that the thrust of the feed mechanism is reduced when the rotational resistance increases during drilling. An object of the present invention is to provide a hydraulic crawler drill in which a low-speed retreat speed in a screw cutting step in a recovery operation and a fast-forward speed in a non-drilling state can be switched as required and appropriately controlled.
【００１７】[0017]
【課題を解決するための手段】本発明のさく孔制御装置
では、油圧で駆動される打撃機構と回転機構とを有する
さく岩機、及びさく岩機の送り機構を備え、送り機構の
前進管路と後退管路の途中に早送り切換用電磁弁を設
け、前進管路には早送り切換用電磁弁の上流側に減圧弁
と逆止弁とを並列に設け、早送り切換用電磁弁と並列に
前進流量調整弁と逆止弁とを設け、後退管路には早送り
切換用電磁弁の上流側に後退圧力調整用リリーフ弁を設
け、早送り切換用電磁弁と並列に後退流量調整弁と逆止
弁とを設け、減圧弁の作動圧制御ポートには前進圧力切
換用電磁弁を介して前進圧力調整用リリーフ弁を接続し
た油圧クローラドリルにおいて、後退管路の後退流量調
整弁と送り機構の油圧アクチュエータとの間にパイロッ
ト切換弁と逆止弁とを並列に設け、パイロット切換弁を
介して後退管路と回転機構の正転管路とを接続する接続
管路を設け、接続管路の途中にオリフィスと逆止弁とを
並列に設け、パイロット切換弁のパイロットポートに接
続されるパイロット管路は、パイロット切換用電磁弁を
介して正転管路に接続すると共に、オリフィスを介して
タンクに接続している。According to the present invention, there is provided a drill control device including a rock drill having a hydraulically driven striking mechanism and a rotary mechanism, a rock drill feed mechanism, and a forward pipe of the feed mechanism. A fast-forward switching solenoid valve is provided in the middle of the road and the retreat line, and a pressure reducing valve and a check valve are provided in parallel in the forward pipeline on the upstream side of the fast-forward switching solenoid valve, and in parallel with the fast-forward switching solenoid valve. A forward flow control valve and a check valve are provided, and a reverse pressure control relief valve is provided upstream of the fast-forward switching solenoid valve in the retreat line, and the reverse flow control valve and the check valve are arranged in parallel with the fast-forward switching solenoid valve. A hydraulic crawler drill with a relief valve for adjusting the forward pressure through a solenoid valve for switching the forward pressure to the operating pressure control port of the pressure reducing valve. Pilot switching valve and check valve between the actuator and Provided in parallel, provided a connecting line connecting the reversing line and the normal rotation line of the rotation mechanism via a pilot switching valve, and provided an orifice and a check valve in parallel in the middle of the connecting line to switch the pilot. The pilot line connected to the pilot port of the valve is connected to the forward rotation line via a pilot switching solenoid valve and to the tank via an orifice.
【００１８】さく孔作業を行う場合、通常のさく孔時に
は、打撃機構、回転機構、及び送り機構に圧油を送りさ
く孔を開始する。さく岩機はロッドに打撃と正転を与え
る。前進管路に供給された圧油は、減圧弁から前進流量
調整弁を通って、送り機構に供給される。このとき正転
管路の圧油がパイロット切換弁を切換えるので、送り機
構からの戻り油は、接続管路を通り、正転管路へ流出す
る。流量は前進流量調整弁とオリフィスで調整され所定
の前進速度が与えられる。前進管路から送り機構に供給
される圧油の圧力は、減圧弁の設定圧力すなわち前進圧
力調整用リリーフ弁の設定圧力である。その結果、送り
機構の前進管路の圧力により生ずる前進力と、回転機構
の正転管路の圧力により生ずる後退力との差によって、
送り機構からさく岩機への推力が与えられる。In the drilling operation, during normal drilling, the drilling of the pressurized oil to the striking mechanism, the rotating mechanism, and the feed mechanism is started. The rock drill hits and turns the rod. The pressure oil supplied to the forward pipeline is supplied from the pressure reducing valve to the feed mechanism through the forward flow control valve. At this time, the pressure oil in the forward rotation pipeline switches the pilot switching valve, so the return oil from the feed mechanism flows out through the connection pipeline to the forward rotation pipeline. The flow rate is adjusted by a forward flow rate adjusting valve and an orifice to give a predetermined forward speed. The pressure of the pressure oil supplied from the advance pipe to the feed mechanism is the set pressure of the pressure reducing valve, that is, the set pressure of the relief valve for adjusting the forward pressure. As a result, due to the difference between the forward force generated by the pressure of the forward line of the feed mechanism and the retreat force generated by the pressure of the forward line of the rotating mechanism,
Thrust from the feed mechanism to the rock drill is given.
【００１９】さく孔中に岩盤の状態が変化してロッドの
回転抵抗が増加すると、回転機構の正転管路の圧力が上
昇するので、送り機構の前進管路の圧力による前進力
と、回転機構の正転管路の圧力による後退力の差は減少
し、送り機構の推力を低減させる。更に回転抵抗が増加
して回転機構の正転管路の圧力が上昇すると、送り機構
の推力が０となって前進を停止し、後退力が前進力を越
えると、送り機構はさく岩機を後退させる。When the state of the rock changes during drilling and the rotational resistance of the rod increases, the pressure in the forward rotation line of the rotation mechanism increases. The difference in the retraction force due to the pressure in the forward rotation channel of the mechanism is reduced, and the thrust of the feed mechanism is reduced. When the rotation resistance further increases and the pressure in the normal rotation pipeline of the rotation mechanism rises, the thrust of the feed mechanism becomes 0 and stops moving forward. When the retreat force exceeds the forward force, the feed mechanism moves the rock drill. Retreat.
【００２０】回転抵抗が減少して回転機構の正転管路の
圧力が正常に戻ると、送り機構の推力も正常に戻る。さ
く孔が終了し回転機構を停止すると、パイロット切換弁
のパイットポートへの圧油の供給は停止されるので、パ
イロット切換弁が送り機構の後退管路と接続管路との連
通を遮断する。When the rotation resistance decreases and the pressure in the normal rotation pipeline of the rotation mechanism returns to normal, the thrust of the feed mechanism also returns to normal. When the drilling is completed and the rotation mechanism is stopped, the supply of the pressure oil to the pilot port of the pilot switching valve is stopped, so that the pilot switching valve cuts off the communication between the retreat pipe and the connection pipe of the feed mechanism. .
【００２１】ロッドの継ぎ足し、回収作業におけるねじ
切り離し工程の低速後退時には、回転機構を逆転させる
ので、逆転管路に圧油が供給される。正転管路は低圧で
あるので、パイロット切換弁は切換わらない。そこで、
後退管路に供給された圧油は、後退流量調整弁を通っ
て、送り機構に供給され、送り機構からの戻り油は、逆
止弁で前進流量調整弁と減圧弁をバイパスし、前進管路
から流出する。このとき送り機構に供給される圧油の圧
力は、後退圧力調整用リリーフ弁の設定圧力となり、流
量は後退流量調整弁の設定流量となって、さく岩機には
送り機構によって所定の低速後退速度が与えられる。When the rod is added and the screw is removed at a low speed in the recovery operation at a low speed, the rotating mechanism is reversed, so that the pressure oil is supplied to the reversing pipeline. The pilot switching valve does not switch because the forward rotation passage is at a low pressure. Therefore,
The pressure oil supplied to the retreat line is supplied to the feed mechanism through the retreat flow control valve, and the return oil from the feed mechanism bypasses the forward flow control valve and the pressure reducing valve by a check valve, and the forward pipe Spills from the road. At this time, the pressure of the pressure oil supplied to the feed mechanism becomes the set pressure of the relieving pressure adjusting relief valve, and the flow rate becomes the set flow rate of the retreat flow adjusting valve. Speed is given.
【００２２】非さく孔状態における早送り時には、早送
り切換用電磁弁と前進圧力切換用電磁弁とパイロット切
換用電磁弁とが切換えられる。早送り前進の際には、前
進管路に供給された圧油が、減圧弁から早送り切換用電
磁弁を通って、送り機構に供給される。このとき、パイ
ロット切換弁が切り換わっていると送り機構からの戻り
油は、接続管路のオリフィスで絞られて早送りができな
くなるので、早送り切換用電磁弁と前進圧力切換用電磁
弁の切換えと同時にパイロット切換用電磁弁も切換えら
れるようにしている。パイロット切換弁が切換わらない
ので送り機構からの戻り油は、早送り切換用電磁弁を通
って後退管路から流出する。このとき送り機構に供給さ
れる圧油の圧力は、減圧弁本体の最大設定圧力となり、
また、前進流量調整弁を通らないので、流量も最大とな
って、さく岩機には送り機構によって大きな推力と高速
の前進速度が与えられる。At the time of fast-forwarding in the non-drilling state, the fast-forward switching solenoid valve, the forward pressure switching solenoid valve, and the pilot switching solenoid valve are switched. At the time of rapid traverse advance, the pressure oil supplied to the forward conduit is supplied to the feed mechanism from the pressure reducing valve through the rapid traverse switching electromagnetic valve. At this time, if the pilot switching valve is switched, the return oil from the feed mechanism is throttled by the orifice of the connection pipe and cannot be fast-forwarded, so that switching between the fast-forward switching solenoid valve and the forward pressure switching solenoid valve is performed. At the same time, the pilot switching solenoid valve is also switched. Since the pilot switching valve is not switched, the return oil from the feed mechanism flows out of the retreat line through the rapid-forward switching electromagnetic valve. At this time, the pressure of the pressure oil supplied to the feed mechanism becomes the maximum set pressure of the pressure reducing valve body,
Also, since the water does not pass through the forward flow control valve, the flow rate is maximized, and the rock drill is given a large thrust and a high forward speed by the feed mechanism.
【００２３】早送り後退の際には、後退後退管路に供給
された圧油が、早送り切換用電磁弁を通って、送り機構
に供給される。送り機構からの戻り油は、早送り切換用
電磁弁を通り、逆止弁で減圧弁をバイパスし、前進管路
から流出する。このとき送り機構に供給される圧油の圧
力は、後退圧力調整用リリーフ弁の設定圧力となり、後
退流量調整弁を通らないので流量は最大となって、さく
岩機には送り機構によって高速の後退速度が与えられ
る。At the time of fast-forward retreat, the pressure oil supplied to the backward-retreat pipe is supplied to the feed mechanism through the fast-forward switching electromagnetic valve. Return oil from the feed mechanism passes through the fast-forward switching electromagnetic valve, bypasses the pressure reducing valve by the check valve, and flows out of the forward pipeline. At this time, the pressure of the pressurized oil supplied to the feed mechanism becomes the set pressure of the relieving pressure adjusting relief valve, and does not pass through the retreat flow adjusting valve, so that the flow rate becomes the maximum. Retreat speed is given.
【００２４】前進圧力調整用リリーフ弁は、さく孔時の
送り機構への供給圧力を設定するものであり、このとき
後退管路と正転回路が接続管路で連通して、送り機構の
前進管路の圧力により生ずる前進力と、回転機構の正転
管路の圧力により生ずる後退力との差によって、送り機
構からさく岩機への推力が与えられるので、正転管路の
圧力分だけ、高い圧力が設定されている。The forward pressure adjusting relief valve sets the supply pressure to the feed mechanism at the time of drilling. At this time, the retreat line and the normal rotation circuit communicate with each other through the connection line, and the feed mechanism moves forward. The thrust from the feed mechanism to the rock drill is given by the difference between the forward force produced by the pressure in the pipeline and the retreat force produced by the pressure in the forward pipeline of the rotating mechanism. , High pressure is set.
【００２５】しかし、この設定圧力が高いと回転を中止
して前進作動のみを行う場合、推力が強すぎてさく孔作
業の操作性が悪くなる。前進圧力調整用リリーフ弁と並
列に低圧リリーフ弁を設け、低圧リリーフ弁を低圧切換
用パイロット切換弁を介してタンクと接続し、低圧切換
用パイロット切換弁のパイロットポートをパイロット管
路と接続することにより、回転を中止して前進作動のみ
を行う場合、パイロット切換弁が接続管路の連通を遮断
すると同時に低圧切換用パイロット切換弁も中立に戻
り、前進管路の圧力は低圧リリーフ弁の設定圧となるの
で、推力が過大になるのを防止できる。However, when the set pressure is high, when the rotation is stopped and only the forward operation is performed, the thrust is too strong and the operability of the drilling operation is deteriorated. Provide a low pressure relief valve in parallel with the forward pressure adjustment relief valve, connect the low pressure relief valve to the tank via the low pressure switching pilot switching valve, and connect the pilot port of the low pressure switching pilot switching valve to the pilot line. Therefore, when the rotation is stopped and only the forward operation is performed, the pilot switching valve cuts off the communication of the connecting line and the low pressure switching pilot switching valve also returns to neutral, and the pressure of the forward line becomes the set pressure of the low pressure relief valve. Therefore, it is possible to prevent the thrust from becoming excessive.
【００２６】[0026]
【発明の実施の形態】図１は本発明の実施の１形態を示
す油圧クローラドリルのさく孔制御装置の油圧回路図で
ある。FIG. 1 is a hydraulic circuit diagram of a drilling control device for a hydraulic crawler drill showing one embodiment of the present invention.
【００２７】この油圧クローラドリルでは、油圧で駆動
される打撃機構１と回転機構２とを有するさく岩機３、
及びさく岩機３の送り機構４を備えており、打撃機構１
がさく孔用のロッドに打撃を与え、回転機構２がさく孔
用のロッドに回転を与えると共に、送り機構４がさく孔
用のロッドに推力を与えて岩盤にさく孔する。In this hydraulic crawler drill, a rock drill 3 having a striking mechanism 1 and a rotating mechanism 2 driven by hydraulic pressure,
And a feed mechanism 4 for the rock drill 3 and a hitting mechanism 1
The drilling rod is hit, the rotating mechanism 2 applies rotation to the drilling rod, and the feed mechanism 4 applies thrust to the drilling rod to drill into the rock.
【００２８】送り機構４の油圧アクチュエータには、フ
ィードモータ５を用いているが、油圧シリンダ等を使用
することもできる。油圧クローラドリルのさく孔制御
は、打撃機構１の高圧管路ＰＨ、低圧管路ＰＬ、回転機
構２の正転管路ＲＦ、逆転管路ＲＲ、送り機構の前進管
路ＦＦ、後退管路ＦＲへの圧油の供給を切換えることに
より行われる。Although the feed motor 5 is used as the hydraulic actuator of the feed mechanism 4, a hydraulic cylinder or the like may be used. The drilling control of the hydraulic crawler drill includes the high pressure line PH, the low pressure line PL of the impact mechanism 1, the forward rotation line RF, the reverse rotation line RR of the rotating mechanism 2, the forward rotation line FF of the feed mechanism, and the backward rotation line FR. This is done by switching the supply of pressure oil to the pump.
【００２９】送り機構４の前進管路ＦＦと後退管路ＦＲ
の途中には早送り切換用電磁弁９が設けられ、前進管路
ＦＦには早送り切換用電磁弁９の上流側に減圧弁６と逆
止弁７とが並列に設けられ、早送り切換用電磁弁９と並
列に前進流量調整弁１０と逆止弁１１とが設けられてい
る。後退管路ＦＲには早送り切換用電磁弁９の上流側に
後退圧力調整用リリーフ弁８が設けられ、早送り切換用
電磁弁９と並列に後退流量調整弁１２と逆止弁１３とが
設けられている。The forward pipeline FF and the backward pipeline FR of the feed mechanism 4
A fast-forward switching solenoid valve 9 is provided in the middle, and a pressure-reducing valve 6 and a check valve 7 are provided in parallel in the forward pipeline FF upstream of the fast-forward switching solenoid valve 9. A forward flow rate regulating valve 10 and a check valve 11 are provided in parallel with 9. A reverse pressure adjusting relief valve 8 is provided upstream of the fast-forward switching solenoid valve 9 in the reverse line FR, and a reverse flow regulating valve 12 and a check valve 13 are provided in parallel with the fast-forward switching electromagnetic valve 9. ing.
【００３０】減圧弁６の作動圧制御ポートには前進圧力
切換用電磁弁１４を介して前進圧力調整用リリーフ弁１
５が接続されている。また、前進圧力調整用リリーフ弁
１４と並列に低圧リリーフ弁２０が設けられ、この低圧
リリーフ弁２０が低圧切換用パイロット切換弁２１を介
してタンク２２と接続されている。The operating pressure control port of the pressure reducing valve 6 is connected to a forward pressure adjusting relief valve 1 via a forward pressure switching electromagnetic valve 14.
5 is connected. Further, a low pressure relief valve 20 is provided in parallel with the forward pressure adjustment relief valve 14, and this low pressure relief valve 20 is connected to a tank 22 via a low pressure switching pilot switching valve 21.
【００３１】後退管路ＦＲの後退流量調整弁１２と送り
機構４のフィードモータ５との間にはパイロット切換弁
２３と逆止弁２４とが並列に設けられ、パイロット切換
弁２３を介して後退管路ＦＲと回転機構２の正転管路Ｒ
Ｆとを接続する接続管路Ｃが設けられている。接続管路
Ｃの途中にはオリフィス２５と逆止弁２６とが並列に設
けられている。このオリフィス２５は、回転及び送りが
同時に作動している状態の後、回転のみを停止した場合
にパイロット切換弁２３を確実にスプリングリターンさ
せる。このオリフィス２５がないと、回転のみを停止し
たとき送り機構からパイロット切換弁２３を通り正転管
路ＲＦに流入する作動油により圧力が発生し正転誤作動
が発生する。A pilot switching valve 23 and a check valve 24 are provided in parallel between the retreat flow regulating valve 12 of the reversing line FR and the feed motor 5 of the feed mechanism 4, and retreat through the pilot switching valve 23. Pipe FR and forward pipe R of rotation mechanism 2
A connection pipe line C for connecting F is provided. An orifice 25 and a check valve 26 are provided in parallel in the connection pipe C. This orifice 25 reliably spring-returns the pilot switching valve 23 when only rotation is stopped after rotation and feed are simultaneously operated. Without the orifice 25, when only rotation is stopped, pressure is generated by hydraulic oil flowing from the feed mechanism through the pilot switching valve 23 into the forward rotation pipeline RF, and a forward rotation malfunction occurs.
【００３２】パイロット切換弁２３のパイロットポート
に接続されるパイロット管路Ｐは、パイロット切換用電
磁弁２７を介して正転管路ＲＦに接続されると共に、オ
リフィス２８を介してタンク２２に接続されている。こ
のオリフィス２８は、パイロット切換用電磁弁２７が作
動した場合パイロット切換弁２３のパイロットポート圧
を開放する。The pilot line P connected to the pilot port of the pilot switching valve 23 is connected to the forward rotation line RF via the pilot switching solenoid valve 27 and to the tank 22 via the orifice 28. ing. The orifice 28 releases the pilot port pressure of the pilot switching valve 23 when the pilot switching electromagnetic valve 27 operates.
【００３３】パイロット切換弁２３、逆止弁２４、オリ
フィス２５、逆止弁２６、パイロット切換用電磁弁、オ
リフィス２８、低圧リリーフ弁２０、低圧切換用パイロ
ット切換弁２１とは、１ブロックとして製作され、従来
の油圧クローラドリルに簡単に取付けることができるよ
うになっている。The pilot switching valve 23, check valve 24, orifice 25, check valve 26, solenoid valve for pilot switching, orifice 28, low pressure relief valve 20, and pilot switching valve 21 for low pressure switching are manufactured as one block. It can be easily attached to a conventional hydraulic crawler drill.
【００３４】油圧クローラドリルは、停止時にガイドシ
ェルを立てた状態にするので、フィードモータ５には、
さく岩機３の落下を防止するためのブレーキ１６を備え
ている。前進又は後退時にフィードモータ５に圧油が供
給されると、このブレーキ１６は解除され、圧油の供給
が停止されるとブレーキ１６が作動するようになってい
る。Since the hydraulic crawler drill keeps the guide shell upright when stopped, the feed motor 5
A brake 16 is provided to prevent the rock drill 3 from falling. When pressure oil is supplied to the feed motor 5 during forward or backward movement, the brake 16 is released, and when the supply of pressure oil is stopped, the brake 16 operates.
【００３５】さく孔作業を行う場合、通常のさく孔時に
は、打撃機構１、回転機構２、及び送り機構４に圧油を
送りさく孔を開始する。さく岩機３はロッドに打撃と正
転を与える。前進管路ＦＦに供給された圧油は、減圧弁
６から前進流量調整弁１０を通って、送り機構４に供給
される。このとき正転管路ＲＦの圧油がパイロット切換
弁２３と低圧切換用パイロット切換弁２１とを切換え
る。送り機構４からの戻り油は、接続管路Ｃを通り、正
転管路ＲＦへ流出する。In the drilling operation, the drilling of the pressurized oil to the striking mechanism 1, the rotation mechanism 2 and the feed mechanism 4 is started during normal drilling. Rock drill 3 strikes and rotates the rod. The pressure oil supplied to the forward pipeline FF is supplied from the pressure reducing valve 6 to the feed mechanism 4 through the forward flow rate adjusting valve 10. At this time, the pressure oil in the forward rotation pipeline RF switches between the pilot switching valve 23 and the low pressure switching pilot switching valve 21. The return oil from the feed mechanism 4 passes through the connection pipe C and flows out to the normal rotation pipe RF.
【００３６】流量は前進流量調整弁１０とオリフィス２
５で調整され所定の前進速度が与えられる。前進管路Ｆ
Ｆから送り機構４に供給される圧油の圧力は、減圧弁６
の設定圧力すなわち前進圧力調整用リリーフ弁１５の設
定圧力である。このとき後退管路ＦＲと正転回路ＲＦと
が接続管路Ｃで連通して、送り機構４の前進管路ＦＦの
圧力により生ずる前進力と、回転機構２の正転管路ＲＦ
の圧力により生ずる後退力との差によって、送り機構５
からさく岩機３への推力が与えられるので、前進圧力調
整用リリーフ弁１５には、正転管路ＲＦの圧力分だけ、
高い圧力が設定されている。ここでは、正転管路ＲＦの
圧力を５０ｋｇｆ／ｃｍ2 程度とし、正常な送り圧力を
５０ｋｇｆ／ｃｍ2 程度に維持するため前進圧力調整用
リリーフ弁１５は圧力を１００ｋｇｆ／ｃｍ2 程度に設
定している。The flow rate is controlled by the forward flow control valve 10 and the orifice 2
A predetermined forward speed adjusted by 5 is given. Forward pipeline F
The pressure of the pressure oil supplied from F to the feed mechanism 4 is reduced by the pressure reducing valve 6.
, Ie, the set pressure of the relief valve 15 for adjusting the forward pressure. At this time, the retreat line FR and the normal rotation circuit RF communicate with each other via the connection line C, and the forward force generated by the pressure of the forward line FF of the feed mechanism 4 and the forward rotation line RF of the rotation mechanism 2
The feed mechanism 5
Since the thrust to the rock drill 3 is given, the forward pressure adjusting relief valve 15 is supplied with a pressure corresponding to the pressure of the forward rotation line RF.
High pressure is set. Here, the pressure of Seitenkanro RF and 50 kgf / cm 2 or so, the forward pressure regulating relief valve 15 for maintaining the normal feed pressure of about 50 kgf / cm 2 sets the pressure at about 100 kgf / cm 2 ing.
【００３７】さく孔中に岩盤の状態が変化してロッドの
回転抵抗が増加すると、回転機構２の正転管路ＲＦの圧
力が上昇するので、送り機構４の前進管路ＦＦの圧力に
よる前進力と、回転機構２の正転管路ＲＦの圧力による
後退力の差は減少し、送り機構４の推力を低減させる。
更に回転抵抗が増加して回転機構２の正転管路ＲＦの圧
力が上昇すると、送り機構４の推力が０となって前進を
停止し、後退力が前進力を越えると、送り機構４はさく
岩機３を後退させる。When the state of the rock changes during drilling and the rotation resistance of the rod increases, the pressure of the forward rotation line RF of the rotation mechanism 2 increases, and the feed mechanism 4 advances by the pressure of the forward rotation line FF. The difference between the force and the retraction force due to the pressure of the forward rotation path RF of the rotation mechanism 2 is reduced, and the thrust of the feed mechanism 4 is reduced.
When the rotation resistance further increases and the pressure in the forward rotation path RF of the rotation mechanism 2 rises, the thrust of the feed mechanism 4 becomes 0 and stops moving forward. When the retreat force exceeds the forward force, the feed mechanism 4 becomes The rock drill 3 is retracted.
【００３８】回転抵抗が減少して回転機構２の正転管路
ＲＦの圧力が正常に戻ると、送り機構４の推力も正常に
戻る。打撃を行わず、正転前進させる場合も上記と同様
である。When the rotational resistance decreases and the pressure in the forward rotation path RF of the rotation mechanism 2 returns to normal, the thrust of the feed mechanism 4 also returns to normal. The same applies to the case of forward rotation without hitting.
【００３９】さく孔が終了し回転機構２を停止すると、
パイロット切換弁２３のパイットポートへの圧油の供給
は停止されるので、パイロット切換弁２３が中立に戻り
送り機構４の後退管路ＦＲと接続管路Ｃとの連通を遮断
する。When the drilling is completed and the rotating mechanism 2 is stopped,
Since the supply of the pressure oil to the pilot port of the pilot switching valve 23 is stopped, the pilot switching valve 23 returns to neutral, and the communication between the retreat line FR of the feed mechanism 4 and the connection line C is cut off.
【００４０】前進管路ＦＦの設定圧力が高いと回転を中
止して前進作動のみを行う場合、推力が強すぎてさく孔
作業の操作性が悪くなる。例えば、孔掃除の際にビット
を岩盤に押しつけると推力が強すぎてガイドシェルが浮
き上がってしまうようなことがある。このとき、前進圧
力調整用リリーフ弁１５の設定圧力を、オペレータが手
動で低圧に調整することも可能であるが、ここでは、前
進圧力調整用リリーフ弁１５と並列に低圧リリーフ弁２
０が設られており、回転を中止して前進作動のみを行う
場合、パイロット切換弁２３が中立に戻って接続管路Ｃ
の連通を遮断すると同時に低圧切換用パイロット切換弁
２１も中立に戻り、前進管路ＦＦの圧力は低圧リリーフ
弁２０の設定圧となるので、推力が過大になるのを自動
的に防止できる。逆転前進の場合も同様である。ここで
は、低圧リリーフ弁２０の設定圧を５０ｋｇｆ／ｃｍ2
程度に設定している。When the set pressure of the forward pipeline FF is high, when the rotation is stopped and only the forward operation is performed, the thrust is too strong and the operability of the drilling operation is deteriorated. For example, if the bit is pressed against the rock during hole cleaning, the thrust may be too strong and the guide shell may rise. At this time, the set pressure of the forward pressure adjusting relief valve 15 can be manually adjusted to a low pressure by an operator, but here, the low pressure relief valve 2 is arranged in parallel with the forward pressure adjusting relief valve 15.
0, and when the rotation is stopped and only the forward operation is performed, the pilot switching valve 23 returns to neutral and the connection line C
At the same time, the low pressure switching pilot switching valve 21 also returns to neutral, and the pressure of the forward passage FF becomes the set pressure of the low pressure relief valve 20, so that the excessive thrust can be automatically prevented. The same applies to the case of reverse rotation. Here, the set pressure of the low-pressure relief valve 20 is set to 50 kgf / cm 2
It is set to about.
【００４１】ロッドの継ぎ足し、回収作業におけるねじ
切り離し工程の低速後退時には、回転機構２を逆転させ
るので、逆転管路ＲＲに圧油が供給される。正転管路Ｒ
Ｆは低圧であるので、パイロット切換弁２３は切換わら
ない。そこで、後退管路ＦＲに供給された圧油は、後退
流量調整弁１２と逆止弁２４を通って、送り機構４に供
給され、送り機構４からの戻り油は、逆止弁１３、７で
前進流量調整弁１０と減圧弁６をバイパスし、前進管路
ＦＦから流出する。このとき送り機構４に供給される圧
油の圧力は、後退圧力調整用リリーフ弁８の設定圧力と
なり、流量は後退流量調整弁１２の設定流量となって、
さく岩機３には送り機構４によって所定の低速後退速度
が与えられる。When the rod is added and the screw is separated at a low speed in the recovery operation, the rotating mechanism 2 is reversed, so that the pressure oil is supplied to the reversing line RR. Forward rotation line R
Since F has a low pressure, the pilot switching valve 23 is not switched. Then, the pressure oil supplied to the retreat line FR is supplied to the feed mechanism 4 through the retreat flow control valve 12 and the check valve 24, and the return oil from the feed mechanism 4 is checked by the check valves 13, 7 , Bypasses the forward flow control valve 10 and the pressure reducing valve 6 and flows out of the forward pipeline FF. At this time, the pressure of the pressure oil supplied to the feed mechanism 4 becomes the set pressure of the relieving pressure adjusting relief valve 8, and the flow rate becomes the set flow rate of the retreat flow adjusting valve 12.
The rock drill 3 is given a predetermined low retreat speed by the feed mechanism 4.
【００４２】正転後退時には、パイロット切換弁２３が
切換わるが、後退管路ＦＲに供給された圧油は、逆止弁
２４を通って、送り機構４に供給されるので後退可能で
ある。正転のみを行う場合には、正転管路ＲＦから圧油
が後退管路ＦＲへ流入するのを防ぐためパイロット切換
用電磁弁２７を切換えて接続管路Ｃを遮断する。At the time of forward reversing, the pilot switching valve 23 is switched. However, the pressure oil supplied to the reversing line FR is supplied to the feed mechanism 4 through the check valve 24, so that the reversing is possible. When only the forward rotation is performed, the connection switching line C is shut off by switching the pilot switching solenoid valve 27 in order to prevent the pressure oil from flowing into the reversing line FR from the forward rotation line RF.
【００４３】非さく孔状態における早送り時には、早送
り切換用電磁弁９と前進圧力切換用電磁弁１４とパイロ
ット切換用電磁弁２７とが切換えられる。早送り前進の
際には、前進管路ＦＦに供給された圧油が、減圧弁６か
ら早送り切換用電磁弁９を通って、送り機構４に供給さ
れる。このとき、パイロット切換弁２３が切換えられて
いると送り機構４からの戻り油は、接続管路Ｃのオリフ
ィス２５で絞られて早送りができなくなるので、早送り
切換用電磁弁９と前進圧力切換用電磁弁１４の切換えと
同時にパイロット切換用電磁弁２７も切換えられるよう
にしている。At the time of rapid feed in the non-drilling state, the solenoid valve 9 for switching fast-forward, the solenoid valve 14 for switching forward pressure, and the solenoid valve 27 for switching pilot are switched. At the time of rapid traverse advance, the pressure oil supplied to the forward pipeline FF is supplied to the feed mechanism 4 from the pressure reducing valve 6 through the rapid traverse switching electromagnetic valve 9. At this time, if the pilot switching valve 23 is switched, the return oil from the feed mechanism 4 is throttled by the orifice 25 of the connection pipe C and cannot be fast-forwarded. The pilot switching electromagnetic valve 27 is also switched at the same time as the electromagnetic valve 14 is switched.
【００４４】パイロット切換弁２３は切換わらないの
で、送り機構４からの戻り油は、早送り切換用電磁弁９
を通って後退管路ＦＲから流出する。このとき送り機構
４に供給される圧油の圧力は、減圧弁６本体の最大設定
圧力となり、また、前進流量調整弁１０を通らないの
で、流量も最大となって、さく岩機３には送り機構４に
よって大きな推力と高速の前進速度が与えられる。ここ
では、減圧弁６の最大設定圧力を１５０ｋｇｆ／ｃｍ2
としている。Since the pilot switching valve 23 does not switch, the return oil from the feed mechanism 4 uses the fast-forward switching solenoid valve 9
Through the retreat line FR. At this time, the pressure of the pressurized oil supplied to the feed mechanism 4 becomes the maximum set pressure of the pressure reducing valve 6 and does not pass through the forward flow rate adjusting valve 10, so that the flow rate also becomes maximum, and the rock drill 3 The feed mechanism 4 gives a large thrust and a high forward speed. Here, the maximum set pressure of the pressure reducing valve 6 is set to 150 kgf / cm 2
And
【００４５】早送り後退の際には、後退管路ＦＲに供給
された圧油が、早送り切換用電磁弁９を通って、送り機
構４に供給される。送り機構４からの戻り油は、早送り
切換用電磁弁９を通り、逆止弁７で減圧弁６をバイパス
し、前進管路ＦＦから流出する。このとき送り機構に供
給される圧油の圧力は、後退圧力調整用リリーフ弁８の
設定圧力となり、後退流量調整弁１２を通らないので流
量は最大となって、さく岩機３には送り機構４によって
高速の後退速度が与えられる。At the time of fast-forward retreat, the pressure oil supplied to the reverse line FR is supplied to the feed mechanism 4 through the fast-forward switching solenoid valve 9. Return oil from the feed mechanism 4 passes through the fast-forward switching solenoid valve 9, bypasses the pressure reducing valve 6 by the check valve 7, and flows out of the forward pipeline FF. At this time, the pressure of the pressurized oil supplied to the feed mechanism becomes the set pressure of the relieving pressure adjusting relief valve 8, and does not pass through the retreat flow adjusting valve 12, so that the flow rate becomes maximum. 4 gives a fast retreat speed.
【００４６】早送りの際には、パイロット切換用電磁弁
２７が切換えられるので、回転機構が正転でも逆転で
も、停止していても、送り機構４の作動は同様である。At the time of rapid traverse, the pilot switching solenoid valve 27 is switched, so that the operation of the feed mechanism 4 is the same regardless of whether the rotation mechanism is rotating forward, reverse, or stopped.
【００４７】[0047]
【発明の効果】以上説明したように、本発明のさく孔制
御装置によば、油圧クローラドリルにおいて、さく孔中
に回転抵抗が増加したとき送り機構の推力を低減させる
ように制御することができ、ロッドの継ぎ足し、回収作
業におけるねじ切り離し工程の低速後退速度、さらに非
さく孔状態における早送り速度が必要に応じて切換えら
れ、適切に制御することができる。As described above, according to the drilling control device of the present invention, it is possible to control the hydraulic crawler drill to reduce the thrust of the feed mechanism when the rotational resistance increases during drilling. In addition, the retreating speed at the low speed in the thread cutting step in the replenishing and collecting operations of the rod, and the rapid feed speed in the non-drilling state can be switched as necessary and appropriately controlled.
【００４８】さらに、前進圧力調整用リリーフ弁と並列
に低圧リリーフ弁を設け、低圧リリーフ弁を低圧切換用
パイロット切換弁を介してタンクと接続し、低圧切換用
パイロット切換弁のパイロットポートをパイロット管路
と接続することにより、回転を中止して前進作動のみを
行う場合、パイロット切換弁が接続管路の連通を遮断す
ると同時に低圧切換用パイロット切換弁も中立に戻り、
前進管路の圧力は低圧リリーフ弁の設定圧となるので、
推力が過大になるのを防止できる。Further, a low pressure relief valve is provided in parallel with the forward pressure adjusting relief valve, the low pressure relief valve is connected to the tank via the low pressure switching pilot switching valve, and the pilot port of the low pressure switching pilot switching valve is connected to the pilot pipe. When the rotation is stopped and only the forward operation is performed by connecting to the path, the pilot switching valve cuts off the communication of the connecting pipe line and at the same time the pilot switching valve for low pressure switching returns to neutral,
Since the pressure in the forward line becomes the set pressure of the low pressure relief valve,
Thrust can be prevented from becoming excessive.
【図１】本発明の実施の一形態を示す油圧クローラドリ
ルのさく孔制御装置の油圧回路図である。FIG. 1 is a hydraulic circuit diagram of a drilling control device for a hydraulic crawler drill according to an embodiment of the present invention.
【図２】従来の油圧クローラドリルのさく孔制御装置の
油圧回路図である。FIG. 2 is a hydraulic circuit diagram of a conventional drilling control device for a hydraulic crawler drill.
１ 打撃機構 ２ 回転機構 ３ さく岩機 ４ 送り機構 ５ フィードモータ ６ 減圧弁 ７ 逆止弁 ８ 後退圧力調整用リリーフ弁 ９ 早送り切換用電磁弁 １０ 前進流量調整弁 １１ 逆止弁 １２ 後退流量調整弁 １３ 逆止弁 １４ 前進圧力切換用電磁弁 ２０ 低圧リリーフ弁 ２１ 低圧切換用パイロット切換弁 ２２ タンク ２３ パイロット切換弁 ２４ 逆止弁 ２５ オリフィス ２６ 逆止弁 ２７ パイロット切換用電磁弁 ２８ オリフィス ＦＦ 前進管路 ＦＲ 後退管路 ＲＦ 正転管路 ＲＲ 逆転管路 Ｐ パイロット管路 Ｃ 接続管路 REFERENCE SIGNS LIST 1 impact mechanism 2 rotation mechanism 3 rock drill 4 feed mechanism 5 feed motor 6 pressure reducing valve 7 check valve 8 relief valve for reverse pressure adjustment 9 solenoid valve for fast-forward switching 10 forward flow control valve 11 check valve 12 reverse flow control valve DESCRIPTION OF SYMBOLS 13 Check valve 14 Forward pressure switching solenoid valve 20 Low pressure relief valve 21 Low pressure switching pilot switching valve 22 Tank 23 Pilot switching valve 24 Check valve 25 Orifice 26 Check valve 27 Pilot switching solenoid valve 28 Orifice FF Forward pipeline FR Reverse line RF Forward line RR Reverse line P Pilot line C Connection line
Claims (2)
を有するさく岩機、及びさく岩機の送り機構を備え、送
り機構の前進管路と後退管路の途中に早送り切換用電磁
弁を設け、前進管路には早送り切換用電磁弁の上流側に
減圧弁と逆止弁とを並列に設け、早送り切換用電磁弁と
並列に前進流量調整弁と逆止弁とを設け、後退管路には
早送り切換用電磁弁の上流側に後退圧力調整用リリーフ
弁を設け、早送り切換用電磁弁と並列に後退流量調整弁
と逆止弁とを設け、前記減圧弁の作動圧制御ポートには
前進圧力切換用電磁弁を介して前進圧力調整用リリーフ
弁を接続した油圧クローラドリルにおいて、前記後退管
路の後退流量調整弁と送り機構の油圧アクチュエータと
の間にパイロット切換弁と逆止弁とを並列に設け、パイ
ロット切換弁を介して後退管路と回転機構の正転管路と
を接続する接続管路を設け、接続管路の途中にオリフィ
スと逆止弁とを並列に設け、パイロット切換弁のパイロ
ットポートに接続されるパイロット管路は、パイロット
切換用電磁弁を介して正転管路に接続すると共に、オリ
フィスを介してタンクに接続したことを特徴とする油圧
クローラドリルのさく孔制御装置。1. A rock drill having a hydraulically driven striking mechanism and a rotation mechanism, and a rock drill feed mechanism, and a fast-forward switching solenoid valve in the middle of a forward pipe and a backward pipe of the feed mechanism. In the forward line, a pressure reducing valve and a check valve are provided in parallel on the upstream side of the fast-forward switching solenoid valve, and a forward flow control valve and a check valve are provided in parallel with the fast-forward switching solenoid valve, and the valve is retracted. In the conduit, a relief valve for adjusting the reverse pressure is provided on the upstream side of the solenoid valve for switching to fast-forward, and a reverse flow regulating valve and a check valve are provided in parallel with the solenoid valve for switching to fast-forward. In a hydraulic crawler drill connected to a relief valve for forward pressure adjustment via a solenoid valve for forward pressure switching, a pilot switching valve and a check valve are provided between the retreat flow control valve of the retreat line and the hydraulic actuator of the feed mechanism. And a valve in parallel. A connecting line connecting the retreat line and the normal rotation line of the rotating mechanism, an orifice and a check valve are provided in parallel in the connecting line, and a pilot connected to the pilot port of the pilot switching valve is provided. A drilling control device for a hydraulic crawler drill, wherein the pipeline is connected to a forward rotation pipeline via a pilot switching solenoid valve and to a tank via an orifice.
リリーフ弁を設け、低圧リリーフ弁を低圧切換用パイロ
ット切換弁を介してタンクと接続し、低圧切換用パイロ
ット切換弁のパイロットポートをパイロット管路と接続
したことを特徴とする請求項１記載の油圧クローラドリ
ルのさく孔制御装置。2. A low pressure relief valve is provided in parallel with a forward pressure adjusting relief valve, the low pressure relief valve is connected to a tank via a low pressure switching pilot switching valve, and a pilot port of the low pressure switching pilot switching valve is connected to a pilot pipe. The drilling control device for a hydraulic crawler drill according to claim 1, wherein the drilling control device is connected to a road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17034696A JP3514916B2 (en) | 1996-06-28 | 1996-06-28 | Drilling control device for hydraulic crawler drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17034696A JP3514916B2 (en) | 1996-06-28 | 1996-06-28 | Drilling control device for hydraulic crawler drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1018752A true JPH1018752A (en) | 1998-01-20 |
| JP3514916B2 JP3514916B2 (en) | 2004-04-05 |
Family
ID=15903232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17034696A Expired - Fee Related JP3514916B2 (en) | 1996-06-28 | 1996-06-28 | Drilling control device for hydraulic crawler drill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3514916B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010521603A (en) * | 2007-03-16 | 2010-06-24 | アトラス コプコ ロツク ドリルス アクチボラグ | Rock drill control method and apparatus and rock drill |
| CN110454140A (en) * | 2019-07-22 | 2019-11-15 | 中煤科工集团西安研究院有限公司 | Drilling machine-hydraulic dual control system and method with integrated hydraulic linkage valve block |
| CN117404363A (en) * | 2023-10-31 | 2024-01-16 | 中国煤炭科工集团太原研究院有限公司 | Servo control hydraulic valve group, anchor drilling rig hydraulic control system and anchor drilling rig |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373915B (en) * | 2010-08-23 | 2014-08-06 | 四川宏华石油设备有限公司 | Bit feeding system of drilling machine |
| CN105257275B (en) * | 2015-10-14 | 2018-11-20 | 三一重型能源装备有限公司 | An automatic drilling system for an oil drilling rig |
| CN106194028A (en) * | 2016-08-31 | 2016-12-07 | 四川鹦鹉螺工业设备运行管理有限公司 | A kind of gas drilling pressure releasing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5633558B2 (en) | 2012-12-14 | 2014-12-03 | カシオ計算機株式会社 | Output control device and program |
-
1996
- 1996-06-28 JP JP17034696A patent/JP3514916B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010521603A (en) * | 2007-03-16 | 2010-06-24 | アトラス コプコ ロツク ドリルス アクチボラグ | Rock drill control method and apparatus and rock drill |
| CN110454140A (en) * | 2019-07-22 | 2019-11-15 | 中煤科工集团西安研究院有限公司 | Drilling machine-hydraulic dual control system and method with integrated hydraulic linkage valve block |
| CN110454140B (en) * | 2019-07-22 | 2022-10-18 | 中煤科工集团西安研究院有限公司 | Drilling machine electro-hydraulic dual-control system with integrated hydraulic linkage valve block and method |
| CN117404363A (en) * | 2023-10-31 | 2024-01-16 | 中国煤炭科工集团太原研究院有限公司 | Servo control hydraulic valve group, anchor drilling rig hydraulic control system and anchor drilling rig |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3514916B2 (en) | 2004-04-05 |
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