JP2003214332A - Driving control method of reciprocating type viscous liquid pump and device - Google Patents
Driving control method of reciprocating type viscous liquid pump and deviceInfo
- Publication number
- JP2003214332A JP2003214332A JP2002016889A JP2002016889A JP2003214332A JP 2003214332 A JP2003214332 A JP 2003214332A JP 2002016889 A JP2002016889 A JP 2002016889A JP 2002016889 A JP2002016889 A JP 2002016889A JP 2003214332 A JP2003214332 A JP 2003214332A
- Authority
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- Japan
- Prior art keywords
- main hydraulic
- hydraulic piston
- viscous fluid
- piston
- pump
- 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.)
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- Reciprocating Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はコンクリートや汚泥
脱水ケーキの如き粘性流体を吸入吐出させるようにする
往復動型粘性流体ポンプの運転制御方法及び装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control method and apparatus for a reciprocating viscous fluid pump that sucks and discharges viscous fluid such as concrete and sludge dewatering cake.
【０００２】[0002]
【従来の技術】往復動型としたダブルピストン式の粘性
流体ポンプにおいて、２本の流体圧送用の主油圧シリン
ダのいずれか一方の主油圧ピストンが前進してストロー
クエンドに達すると、近接センサが作動して吸入吐出弁
（揺動弁、滑り弁等）を切り換えるようにすると共に、
主油圧シリンダの主油圧ピストンを逆方向に切り換える
ようにすることは公知である。2. Description of the Related Art In a reciprocating double-piston viscous fluid pump, when one main hydraulic piston of two main hydraulic cylinders for fluid pressure feed advances and reaches a stroke end, a proximity sensor is activated. It operates to switch intake and discharge valves (swing valve, slide valve, etc.),
It is known to switch the main hydraulic piston of the main hydraulic cylinder in the opposite direction.
【０００３】一例として吸入吐出弁を揺動弁型式とした
コンクリートポンプについて示すと、図４に示す如く、
ホッパ１の前側壁１ａの下部に２つの吸入吐出口２ａ，
２ｂを左右に並べて設け、ホッパ１の前側には、上記２
つの吸入吐出口２ａ，２ｂに各々連通する左右２本のコ
ンクリートシリンダ３ａと３ｂを平行に設置し、該各コ
ンクリートシリンダ３ａ，３ｂ内に収納したコンクリー
トピストン４ａ，４ｂを、上記コンクリートシリンダ３
ａ，３ｂに洗浄室５を介して接続した左右２本の主油圧
シリンダ６ａ，６ｂ内の主油圧ピストン７ａ，７ｂに各
１本のロッド８ａ，８ｂを介して一体的に連結し、主油
圧シリンダ６ａ，６ｂの主油圧ピストン７ａ，７ｂを交
互に前進後退させることによってコンクリートピストン
４ａ，４ｂを交互に前進後退させるようにしてある。As an example, a concrete pump having a swing valve type intake and discharge valve is shown as shown in FIG.
In the lower part of the front side wall 1a of the hopper 1, two intake / discharge ports 2a,
2b are arranged side by side, and the above 2
Two left and right concrete cylinders 3a and 3b, which communicate with the respective intake and discharge ports 2a and 2b, are installed in parallel, and the concrete pistons 4a and 4b housed in the respective concrete cylinders 3a and 3b are connected to the concrete cylinder 3 described above.
a and 3b are connected to the main hydraulic pistons 7a and 7b in the left and right main hydraulic cylinders 6a and 6b, respectively, which are connected to each other via the cleaning chamber 5, through the rods 8a and 8b, respectively. By alternately advancing and retracting the main hydraulic pistons 7a, 7b of the cylinders 6a, 6b, the concrete pistons 4a, 4b are alternately advanced and retracted.
【０００４】又、上記ホッパ１内には、Ｓ字状に屈曲さ
せた揺動管９を収納位置させ、該揺動管９の前端にはバ
ルブリング１０を取り付けて、バルブリング１０がホッ
パ１の前側壁１ａの内面に取り付けられたバルブプレー
ト１１に沿い摺動して上記２つの吸入吐出口２ａ，２ｂ
に交互に一致できるようにすると共に、上記揺動管９の
後端部をホッパ１の後側壁１ｂに連設した吐出フランジ
１２を介してコンクリート輸送管１３に接続させ、且つ
上記揺動管９の後端部の揺動軸心に合わせて該揺動管９
の途中に固定した揺動軸１４をホッパ１の外部に設置し
た図示しない左右２本の揺動シリンダに操作レバーを介
して連結し、操作レバーを左右に傾動させることにより
揺動管９を揺動軸１４を中心に左右方向に揺動できるよ
うにしてある。In addition, an oscillating tube 9 bent into an S shape is placed inside the hopper 1, and a valve ring 10 is attached to the front end of the oscillating tube 9 so that the valve ring 10 is attached to the hopper 1. Slides along the valve plate 11 attached to the inner surface of the front side wall 1a of the above two intake ports 2a, 2b.
And the rear end of the rocking pipe 9 is connected to the concrete transport pipe 13 via a discharge flange 12 that is connected to the rear side wall 1b of the hopper 1, and the rocking pipe 9 The rocking tube 9 is aligned with the rocking axis of the rear end portion.
The swing shaft 14 fixed in the middle of the hopper is connected to two swing cylinders (not shown) installed outside the hopper 1 via the operating lever, and the operating lever is tilted to the left and right to swing the swing tube 9. The movable shaft 14 can be swung in the left-right direction.
【０００５】更に、上記主油圧シリンダ６ａ，６ｂは、
ロッド側圧力室同士を密封ライン１５で接続すると共
に、ヘッド側圧力室に、アクチュエータ１６の作動で傾
転角を変更できるようにした片傾転油ポンプ１７、タン
ク１８に接続された圧油給排ライン１９を接続し、該圧
油給排ライン１９の途中に、電磁四方弁２０の作動によ
って切り換えられるようにした主切換弁２１を設け、主
油圧シリンダ６ａ，６ｂの各前進側ストロークエンドに
設けた近接センサＬＳ．１又はＬＳ．２からの信号で電
磁四方弁２０のソレノイドＳＯＬ．１又はＳＯＬ．２を
励磁して該電磁四方弁２０をポートａ側又はｂ側に切り
換えることにより、主切換弁２１をポートａ側又はｂ側
に切り換えて主油圧ピストン７ａ，７ｂを交互に前進後
退させるようにしてあり、又、この動作と所要のタイミ
ングで吸入吐出弁としての上記揺動管９が切り換えられ
るようにしてある。２２は安全弁を示す。Further, the main hydraulic cylinders 6a and 6b are
The rod-side pressure chambers are connected to each other by the sealing line 15, and the head-side pressure chambers are connected to the one-sided tilting oil pump 17 and the tank 18 which are capable of changing the tilt angle by the operation of the actuator 16. A discharge line 19 is connected, and a main switching valve 21 that can be switched by the operation of a solenoid four-way valve 20 is provided in the middle of the pressure oil supply / discharge line 19, and the main hydraulic cylinders 6a and 6b are provided with stroke ends on the forward side. The proximity sensor LS. 1 or LS. 2 from the solenoid SOL. 1 or SOL. By exciting 2 to switch the electromagnetic four-way valve 20 to the port a side or the b side, the main switching valve 21 is switched to the port a side or the b side to alternately move the main hydraulic pistons 7a and 7b forward and backward. Further, the oscillating pipe 9 as the intake / discharge valve is switched at this operation and a required timing. 22 is a safety valve.
【０００６】上記従来の揺動弁型式としたコンクリート
ポンプの吸入吐出弁を作動させてホッパ１内のコンクリ
ートを吸入吐出させるときは、ホッパ１内で揺動管９を
揺動させて行い、揺動管９の前端がいずれか一方の吸入
吐出口２ａ又は２ｂに連通させられると、該揺動管９が
連通させられた吸入吐出口２ａ又は２ｂ側のコンクリー
トシリンダ３ａ又は３ｂのコンクリートピストン４ａ又
は４ｂを前進させて、これまでコンクリートシリンダ３
ａ又は３ｂ内に吸入したコンクリートを揺動管９内を通
して吐出させると同時に、別のコンクリートシリンダ３
ｂ又は３ａではコンクリートピストン４ｂ又は４ａを後
退させてホッパ１内のコンクリートを他方の吸入吐出口
２ｂ又は２ａを通して吸入させるようにし、次に、揺動
管９をこれまで吸入側であった吸入吐出口２ｂ又は２ａ
に切り換えて当該吸入吐出口２ｂ又は２ａ側のコンクリ
ートシリンダ３ｂ又は３ａのピストン４ｂ又は４ａを前
進させると同時にこれまで吐出側であった吸入吐出口２
ａ又は２ｂ側のコンクリートシリンダ３ａ又は３ｂにコ
ンクリートを吸入させるようにし、かかる動作を繰り返
してコンクリートの吸入吐出の切り換えを行うようにし
てある。When the suction and discharge valves of the conventional rocking valve type concrete pump are actuated to suck and discharge the concrete in the hopper 1, the rocking pipe 9 is rocked in the hopper 1 and rocked. When the front end of the moving pipe 9 is communicated with either one of the suction / discharge ports 2a or 2b, the concrete piston 4a of the concrete cylinder 3a or 3b on the suction / discharge port 2a or 2b side with which the rocking pipe 9 is communicated or 4b forward, concrete cylinder 3 until now
At the same time as discharging the concrete sucked into a or 3b through the inside of the rocking pipe 9, another concrete cylinder 3
At b or 3a, the concrete piston 4b or 4a is retracted so that the concrete in the hopper 1 is sucked through the other suction / discharge port 2b or 2a, and then the rocking pipe 9 is sucked and discharged on the suction side. Exit 2b or 2a
And the piston 4b or 4a of the concrete cylinder 3b or 3a on the side of the suction / discharge port 2b or 2a is moved forward, and at the same time, the suction / discharge port 2 which has been the discharge side until now.
Concrete is sucked into the concrete cylinder 3a or 3b on the side a or 2b, and the suction / discharge of concrete is switched by repeating such an operation.
【０００７】[0007]
【発明が解決しようとする課題】ところが、上記コンク
リートポンプの場合、定常運転時は、片傾転油ポンプ１
７の圧油吐出量に基づく一定速度で主油圧シリンダ６
ａ，６ｂの主油圧ピストン７ａ，７ｂが動作し、主切換
弁２１の作動により主油圧ピストン７ａ，７ｂの前進、
後退が瞬時に切り換えられるようにしてあるため、この
切り換え時に、大気開放されたコンクリートの吐出圧力
が再度急激に昇圧されることに伴い、大きな圧力変動を
起すことから、脈動が発生することになる。この脈動
は、配管振動やブーム振動の原因となり、大きな問題と
なっている。However, in the case of the above concrete pump, the one-sided tilting oil pump 1 is operated during steady operation.
Main hydraulic cylinder 6 at a constant speed based on the pressure oil discharge amount of 7.
The main hydraulic pistons 7a and 7b of a and 6b operate, and the main hydraulic pistons 7a and 7b move forward by the operation of the main switching valve 21.
Since the retreat can be switched instantaneously, at the time of this switching, the discharge pressure of the concrete released to the atmosphere is suddenly increased again, causing a large pressure fluctuation, which causes pulsation. . This pulsation causes pipe vibration and boom vibration, and is a major problem.
【０００８】因に、油ポンプとして両傾転油ポンプを用
いた方式の場合、傾転を逆方向に切り換えるときに油量
変化が起ることから、主油圧ピストンの前進、後退の切
り換え時にブレーキが掛かり、この作用が脈動を低減さ
せる効果があるとされているが、回路構成が複雑とな
り、コスト高となってしまう。Incidentally, in the case of the system using the two-tilt oil pump as the oil pump, the amount of oil changes when the tilt is switched in the opposite direction. Therefore, when the main hydraulic piston is moved forward or backward, the brake is applied. It is said that this action has the effect of reducing pulsation, but the circuit configuration becomes complicated and the cost increases.
【０００９】そこで、本発明は、ポンプ運転時に発生す
る大きな圧力変動を緩和して脈動を効果的に低減させる
ことができるようにしようとするものである。Therefore, the present invention is intended to alleviate large pressure fluctuations that occur during pump operation and to effectively reduce pulsation.
【００１０】[0010]
【課題を解決するための手段】本発明は、上記課題を解
決するために、粘性流体圧送用の２本の主油圧シリンダ
に片傾転油ポンプから吐出された圧油を交互に供給し
て、いずれか一方の主油圧シリンダの主油圧ピストンが
前進側ストロークエンドに達すると、吸入吐出弁を切り
換えるようにすると共に主油圧ピストンの前進後退を逆
方向に切り換えるようにしてある往復動型粘性流体ポン
プの運転制御方法において、主油圧ピストンが前進して
前進側ストロークエンドよりも所要量手前の位置に到着
すると、該位置から前進側ストロークエンドに達するま
での間、当該主油圧ピストンの前進速度を減速させるよ
うにし、しかる後、吸入吐出弁が切り換えられてから、
主油圧ピストンを所要量後退させる間に、当該主油圧ピ
ストンの後退速度を増速させて元に戻すようにする往復
動型粘性流体ポンプの運転制御方法とする。In order to solve the above-mentioned problems, the present invention alternately supplies two main hydraulic cylinders for pressure-feeding viscous fluid with pressure oil discharged from a one-sided tilting oil pump. , When the main hydraulic piston of one of the main hydraulic cylinders reaches the stroke end on the forward side, the reciprocating viscous fluid is designed so that the intake / discharge valve is switched and forward / backward of the main hydraulic piston is switched in the reverse direction. In the pump operation control method, when the main hydraulic piston advances and reaches a position that is a required amount before the forward stroke end, the forward speed of the main hydraulic piston is changed from that position to the forward stroke end. Slow down, and after that, after the intake / discharge valve is switched,
An operation control method for a reciprocating viscous fluid pump, in which the retreat speed of the main hydraulic piston is increased and returned to the original while the main hydraulic piston is retracted by a required amount.
【００１１】主油圧シリンダの主油圧ピストンが前進側
ストロークエンドに達して切り換えられる前後に、主油
圧ピストンが減速、増速されるため、圧力変動が緩和さ
れ、圧送される粘性流体に対する衝撃を減少することが
できて脈動を低減することができる。Before and after the main hydraulic piston of the main hydraulic cylinder reaches the forward stroke end and is switched, the main hydraulic piston is decelerated and accelerated, so that the pressure fluctuation is alleviated and the impact on the viscous fluid to be pumped is reduced. It is possible to reduce the pulsation.
【００１２】又、粘性流体圧送用の２本の主油圧シリン
ダに片傾転油ポンプから吐出された圧油を交互に供給し
て、いずれか一方の主油圧シリンダの主油圧ピストンが
前進側ストロークエンドに達すると、吸入吐出弁を切り
換えるようにすると共に主油圧ピストンの前進後退を逆
方向に切り換えるようにしてある往復動型粘性流体ポン
プの運転制御装置において、主油圧シリンダの前進側ス
トロークエンド位置よりも所要量手前の位置に近接セン
サを設置し、且つ主油圧ピストンが前進したときに作動
する上記近接センサの作動信号に基づいて当該主油圧ピ
ストンが近接センサの位置から前進側ストロークエンド
に達するまでの間片傾転油ポンプの傾転角を小さくして
主油圧ピストンの前進速度を減速させるように補正する
指令と主油圧ピストンを前進側ストロークエンドから所
要量後退させるまでの間片傾転油ポンプの傾転角を大き
くして元に戻すようにする指令とを発するようにした制
御器を有する構成とした往復動型粘性流体ポンプの運転
制御装置とすることにより、複雑な回路構成とすること
なく、脈動を低減できて、配管振動等を抑えることがで
きる。Further, the pressure oil discharged from the one-sided tilt oil pump is alternately supplied to the two main hydraulic cylinders for pressure-feeding the viscous fluid so that the main hydraulic piston of either one of the main hydraulic cylinders moves forward. When the end is reached, in the operation control device of the reciprocating viscous fluid pump that switches the intake / discharge valve and switches the forward / backward movement of the main hydraulic piston in the reverse direction, the forward stroke end position of the main hydraulic cylinder A proximity sensor is installed at a position before the required amount, and the main hydraulic piston reaches the forward stroke end from the position of the proximity sensor based on the operation signal of the proximity sensor that operates when the main hydraulic piston moves forward. Between the main hydraulic piston and the command to correct the forward speed of the main hydraulic piston by reducing the tilt angle of the one-sided oil pump. Reciprocating type with a controller for issuing a command to increase the tilt angle of the one-sided tilt oil pump and return it to the original position from the stroke end on the forward side to the backward movement by a required amount. By using the operation control device for the viscous fluid pump, it is possible to reduce pulsation and suppress pipe vibration without a complicated circuit configuration.
【００１３】更に、片傾転油ポンプの傾転角を小さくし
て主油圧ピストンの前進速度を減速させるための補正時
間を、運転速度に応じて選定するようにした構成とする
ことにより、そのときのポンプの運転速度に適した制御
を行うことができる。Further, the correction time for reducing the tilting angle of the one-sided tilting oil pump to reduce the forward speed of the main hydraulic piston is selected according to the operating speed. It is possible to perform control suitable for the operating speed of the pump at that time.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００１５】図１は本発明の実施の一形態を示すもの
で、図４に示したコンクリートポンプと同様な構成にお
いて、主油圧シリンダ６ａ，６ｂ前進側ストロークエン
ド位置ｘよりも所要量手前の位置ｙに近接センサＬＳ．
３，ＬＳ．４を設置し、且つ該近接センサＬＳ．３，Ｌ
Ｓ．４の作動信号に基づき吸入吐出弁や主油圧シリンダ
６ａ，６ｂの切換指令及び片傾転油ポンプ１７の制御指
令を出力するようにした制御器２３を備える。FIG. 1 shows an embodiment of the present invention. In a structure similar to that of the concrete pump shown in FIG. 4, the main hydraulic cylinders 6a, 6b are located a required amount before the forward stroke end position x. y to the proximity sensor LS.
3, LS. 4 is installed and the proximity sensor LS. 3, L
S. The controller 23 is configured to output a switching command for the intake / discharge valves and the main hydraulic cylinders 6a, 6b and a control command for the one-sided tilt oil pump 17 based on the operation signal of No. 4.
【００１６】上記制御器２３について詳述すると、該制
御器２３には、近接センサＬＳ．３又はＬＳ．４が作動
信号を発すると、運転速度としての主油圧ピストン６ａ
又は６ｂの１ストローク分の動作時間Ｔに基づいて設定
された補正時間ｔだけ片傾転油ポンプ１７の傾転角を徐
々に小さくして主油圧ピストン６ａ又は６ｂの前進速度
を減速させるようにすると共に、上記補正時間ｔ経過後
に主油圧ピストン６ａ又は６ｂを前進側ストロークエン
ド位置ｘから所要量後退させる間だけ片傾転油ポンプ１
７の傾転角を徐々に大きくして主油圧ピストン７ａ又は
７ｂの後退速度を増速し元の運転速度に戻すような制御
指令Ｓを片傾転油ポンプ１７のアクチュエータ１６に与
える機能を具備させてある。又、吸入吐出弁としての揺
動管９への切換指令Ｓ１と、主油圧ピストン７ａ，７ｂ
を逆方へ切り換えるための切換指令Ｓ２（電磁四方弁２
０のソレノイドＳＯＬ．１又はＳＯＬ．２を励磁する信
号）は、上記補正時間ｔが経過した後に所要のタイミン
グで出力されるようにしてある。The controller 23 will be described in detail. The controller 23 includes a proximity sensor LS. 3 or LS. 4 sends an actuation signal, the main hydraulic piston 6a as the operating speed
Alternatively, the tilting angle of the one-sided tilting oil pump 17 is gradually decreased by the correction time t set based on the operation time T of one stroke of 6b to reduce the forward speed of the main hydraulic piston 6a or 6b. In addition, the one-sided tilt oil pump 1 is operated only while the main hydraulic piston 6a or 6b is retracted from the forward stroke end position x by a required amount after the correction time t has elapsed.
7 has a function of giving a control command S to the actuator 16 of the one-way tilt oil pump 17 so as to gradually increase the tilt angle of 7 to increase the reverse speed of the main hydraulic piston 7a or 7b to return to the original operating speed. I am allowed. Further, the switching command S 1 to the swing pipe 9 as the intake / discharge valve and the main hydraulic pistons 7a, 7b
Command S 2 for switching the valve to the opposite direction (electromagnetic four-way valve 2
0 solenoid SOL. 1 or SOL. The signal for exciting 2) is output at a required timing after the correction time t has elapsed.
【００１７】上記構成としてあるコンクリートポンプの
運転は、図２に示すフローチャート並びに図３に示すタ
イムチャートに基づいて行われる。コンクリートポンプ
は、通常、その現場の状況に応じた運転速度、すなわ
ち、左右の主油圧シリンダ６ａ，６ｂの主油圧ピストン
７ａ，７ｂの１ストローク分の動作時間Ｔが設定され
る。The operation of the concrete pump having the above structure is performed based on the flowchart shown in FIG. 2 and the time chart shown in FIG. The operating speed T of the concrete pump is usually set according to the situation of the site, that is, the operating time T for one stroke of the main hydraulic pistons 7a, 7b of the left and right main hydraulic cylinders 6a, 6b.
【００１８】今、左側の主油圧シリンダ６ａの主油圧ピ
ストン７ａが後退し、右側の主油圧シリンダ６ｂの主油
圧ピストン７ｂが前進している場合において、図１に示
す如く、右側の主油圧ピストン７ｂが前進側ストローク
エンド位置ｘよりも手前に設定された位置ｙに到着する
と、右側の近接センサＬＳ．４が作動させられることに
よりその信号が制御器２３に送られる。制御器２３で
は、この近接センサＬＳ．４の作動信号に基づいて、先
ず、左側の主油圧ピストン７ａの前進による左側の近接
センサＬＳ．３が前回作動したときから、今回右側の近
接センサＬＳ．４が作動したときまでの主油圧ピストン
７ｂの動作時間Ｔを算出し、この算出した時間Ｔに応じ
た補正時間ｔの間だけ、片傾転油ポンプ１７の傾転角を
小さくするようにアクチュエータ１６に制御指令Ｓを出
力する。これにより、片傾転油ポンプ１７の圧油吐出量
が徐々に減少させられることで、主油圧ピストン７ｂの
前進速度が減少させられる。Now, when the main hydraulic piston 7a of the left main hydraulic cylinder 6a is retracted and the main hydraulic piston 7b of the right main hydraulic cylinder 6b is advanced, as shown in FIG. 7b arrives at a position y set before the stroke end position x on the forward side, the proximity sensor LS. The signal is sent to the controller 23 by the actuation of 4. In the controller 23, the proximity sensor LS. 4 based on the forward movement of the left main hydraulic piston 7a, the left proximity sensor LS. 3 has been operated last time, this time the proximity sensor LS. 4 calculates the operation time T of the main hydraulic piston 7b up to the time when the actuator 4 operates, and the actuator is arranged to reduce the tilt angle of the one-sided tilt oil pump 17 only during the correction time t corresponding to the calculated time T. The control command S is output to 16. As a result, the pressure oil discharge amount of the one-sided tilting oil pump 17 is gradually decreased, and the forward speed of the main hydraulic piston 7b is decreased.
【００１９】次に、上記補正時間ｔが経過すると、吸入
吐出としての揺動管９の切換指令Ｓ １と左右の主油圧ピ
ストン７ａ，７ｂを逆方向へ切り換えるための切換指令
Ｓ２とを所要のタイミングで出力する。しかる後、片傾
転油ポンプ１７の傾転角を大きくするようにアクチュエ
ータ１６に制御指令Ｓを出力する。これにより、片傾転
油ポンプ１７の圧油吐出量が徐々に増大させられること
で、右側の主油圧ピストン７ｂの後退速度、すなわち、
左側の主油圧ピストン７ａの前進速度が設定速度まで増
速させられる。このようにして、左右の主油圧シリンダ
６ａ，６ｂの主油圧ピストン７ａ，７ｂの前進後退が切
り換えられた後も、図３のタイムチャートに示す如く、
同様に制御される。Next, when the correction time t elapses, inhalation is performed.
Switching command S of rocking tube 9 as discharge 1And the left and right main hydraulic
Switching command for switching the stones 7a, 7b in the opposite direction
STwoAnd are output at the required timing. After that, tilted
Actuator to increase the tilt angle of the oil transfer pump 17.
The control command S is output to the data 16. As a result,
The amount of pressure oil discharged from the oil pump 17 should be gradually increased.
Then, the reverse speed of the main hydraulic piston 7b on the right side, that is,
The forward speed of the left main hydraulic piston 7a increases to the set speed.
Be speeded up. In this way, the left and right main hydraulic cylinders
6a, 6b main hydraulic piston 7a, 7b forward and backward
Even after the replacement, as shown in the time chart of FIG.
It is controlled similarly.
【００２０】上記において、補正時間ｔの間だけ片傾転
油ポンプ１７の圧油吐出量を減少させる領域では、図３
に示す如く、設定吐出量から最小吐出量まで漸減させる
領域Ａ１と最小吐出量を維持する領域Ａ２を作るように
しておく。したがって、領域Ａ１の間は主油圧ピストン
７ａ，７ｂの前進速度が徐々に減速されて最低速度とな
り、領域Ａ２の間は主油圧ピストン７ａ，７ｂの前進速
度が最低速度で維持することになる。なお、この圧油吐
出量を漸減させる領域Ａ１と、補正時間ｔ経過後に圧油
吐出量を漸増させる領域Ａ３の傾き角、つまり、主油圧
ピストンの増速度、減速度はアンプにより任意に設定す
ることができる。又、上記近接センサＬＳ．３，ＬＳ．
４の作動信号を基に算出する主油圧ピストン７ａ，７ｂ
の動作時間Ｔと、算出された動作時間Ｔに応じて選定さ
れる補正時間ｔとの関係は、たとえば、表１に示す如く
であり、種々の運転速度に応じて求めておいた最適値で
ある。In the above-mentioned range, in which the pressure oil discharge amount of the one-sided tilting oil pump 17 is reduced only during the correction time t, as shown in FIG.
As shown in, the area A 1 where the set discharge amount is gradually reduced to the minimum discharge amount and the area A 2 where the minimum discharge amount is maintained are created. Therefore, the forward speed of the main hydraulic pistons 7a, 7b is gradually reduced to the minimum speed during the area A 1 , and the forward speed of the main hydraulic pistons 7a, 7b is maintained at the minimum speed during the area A 2. Become. It should be noted that the inclination angle between the region A 1 in which the pressure oil discharge amount is gradually reduced and the region A 3 in which the pressure oil discharge amount is gradually increased after the correction time t elapses, that is, the acceleration and deceleration of the main hydraulic piston are arbitrarily set by the amplifier. Can be set. Further, the proximity sensor LS. 3, LS.
Main hydraulic pistons 7a, 7b calculated based on the operation signal of No. 4
The relationship between the operating time T and the correction time t selected according to the calculated operating time T is, for example, as shown in Table 1, and is an optimum value determined according to various operating speeds. is there.
【００２１】[0021]
【表１】 [Table 1]
【００２２】このように、本発明においては、主油圧シ
リンダ６ａ，６ｂのストロークエンド位置ｘよりも手前
の位置ｙに設けておいた近接センサＬＳ．３，ＬＳ．４
の作動信号を基に、片傾転油ポンプ１７の圧油吐出量を
減少、増大させて、主油圧シリンダ６ａ，６ｂの主油圧
ピストン７ａ，７ｂの切り換え前後における作動速度を
減速、増速させるように制御するので、主油圧ピストン
７ａと７ｂの前進後退の切り換え時に発生する大きな圧
力変動を緩和することができる。又、上述したように、
片傾転油ポンプ１７の圧油吐出量の制御は、設定された
運転速度に適した時間で行われるようにしてあるので、
あらゆる運転状況においても、主油圧ピストン７ａ，７
ｂの切り換え時の大きな圧力変動を緩和することができ
る。したがって、圧送されるコンクリートに対する衝撃
を減少することができて、脈動を効果的に低減すること
ができ、配管振動やブーム振動を減少させることができ
ると共に、各付帯構造物に加わる負荷をも低減すること
ができる。As described above, in the present invention, the proximity sensor LS. Is provided at the position y before the stroke end position x of the main hydraulic cylinders 6a and 6b. 3, LS. Four
Based on the operation signal of, the pressure oil discharge amount of the one-sided tilting oil pump 17 is decreased and increased to reduce or increase the operation speed before and after the switching of the main hydraulic pistons 7a and 7b of the main hydraulic cylinders 6a and 6b. Since the control is performed as described above, it is possible to mitigate a large pressure fluctuation that occurs when the main hydraulic pistons 7a and 7b are switched between forward and backward movements. Also, as mentioned above,
Since the control of the pressure oil discharge amount of the one-sided tilt oil pump 17 is performed at a time suitable for the set operating speed,
In all operating conditions, the main hydraulic pistons 7a, 7a
It is possible to reduce large pressure fluctuations when switching b. Therefore, the impact on the concrete to be pumped can be reduced, the pulsation can be effectively reduced, the pipe vibration and the boom vibration can be reduced, and the load applied to each incidental structure is also reduced. can do.
【００２３】なお、上記実施の形態では、吸入吐出弁の
切換指令Ｓ１と主油圧シリンダ６ａ，６ｂの切換指令Ｓ
２を、位置ｙの近接センサＬＳ．３，ＬＳ．４の作動信
号を基準に、補正時間ｔ経過後に発するようにした場合
を示したが、ストロークエンド位置ｘに別途近接センサ
を設けておいて、この近接センサの作動信号を基に発す
るようにしてもよいこと、又、コンクリートポンプにつ
いて説明したが、コンクリート以外の粘性流体等の圧送
に用いられるようにしたものにも適用できること、その
他本発明の要旨を逸脱しない範囲内において種々変更を
加え得ることは勿論である。In the above embodiment, the intake / discharge valve switching command S 1 and the main hydraulic cylinders 6a and 6b switching command S are used.
2 to the proximity sensor LS. 3, LS. Although the case where the operation signal of FIG. 4 is set to be issued after the lapse of the correction time t is shown, a separate proximity sensor is provided at the stroke end position x, and the operation signal of the proximity sensor is used to generate the signal. Also, although the concrete pump has been described, it can be applied to a pump adapted to be used for pumping a viscous fluid other than concrete, and various changes can be made without departing from the scope of the present invention. Of course.
【００２４】[0024]
【発明の効果】以上述べた如く、本発明によれば、次の
如き優れた効果を発揮する。As described above, according to the present invention, the following excellent effects are exhibited.
【００２５】(1)粘性流体圧送用の２本の主油圧シリン
ダに片傾転油ポンプから吐出された圧油を交互に供給し
て、いずれか一方の主油圧シリンダの主油圧ピストンが
前進側ストロークエンドに達すると、吸入吐出弁を切り
換えるようにすると共に主油圧ピストンの前進後退を逆
方向に切り換えるようにしてある往復動型粘性流体ポン
プの運転制御方法において、主油圧ピストンが前進して
前進側ストロークエンドよりも所要量手前の位置に到着
すると、該位置から前進側ストロークエンドに達するま
での間、当該主油圧ピストンの前進速度を減速させるよ
うにし、しかる後、吸入吐出弁が切り換えられてから、
主油圧ピストンを所要量後退させる間に、当該主油圧ピ
ストンの後退速度を増速させて元に戻すようにする往復
動型粘性流体ポンプの運転制御方法としてあるので、主
油圧ピストンが前進側ストロークエンドに達して切り換
えられる前後に主油圧ピストンが減速、増速されること
で圧力変動を緩和することができ、圧力変動に伴い発生
する脈動を効果的に低減することができ、これにより、
配管振動やブーム振動を減少させることができる。(1) The pressure oil discharged from the one-sided tilt oil pump is alternately supplied to the two main hydraulic cylinders for pressure-feeding the viscous fluid so that the main hydraulic piston of one of the main hydraulic cylinders is on the forward side. When the stroke end is reached, in the operation control method of the reciprocating viscous fluid pump in which the intake / discharge valve is switched and the forward / backward movement of the main hydraulic piston is switched in the reverse direction, the main hydraulic piston moves forward and forward. When it arrives at a position that is a required amount before the side stroke end, the forward speed of the main hydraulic piston is decelerated until it reaches the forward stroke end from that position, and then the intake / discharge valve is switched. From
Since the operation control method of the reciprocating viscous fluid pump is such that the retraction speed of the main hydraulic piston is increased and returned to the original while the main hydraulic piston is retracted by the required amount, By decelerating and accelerating the main hydraulic piston before and after reaching the end and switching, the pressure fluctuation can be mitigated, and the pulsation generated due to the pressure fluctuation can be effectively reduced.
Pipe vibration and boom vibration can be reduced.
【００２６】(2)粘性流体圧送用の２本の主油圧シリン
ダに片傾転油ポンプから吐出された圧油を交互に供給し
て、いずれか一方の主油圧シリンダの主油圧ピストンが
前進側ストロークエンドに達すると、吸入吐出弁を切り
換えるようにすると共に主油圧ピストンの前進後退を逆
方向に切り換えるようにしてある往復動型粘性流体ポン
プの運転制御装置において、主油圧シリンダの前進側ス
トロークエンド位置よりも所要量手前の位置に近接セン
サを設置し、且つ主油圧ピストンが前進したときに作動
する上記近接センサの作動信号に基づいて当該主油圧ピ
ストンが近接センサの位置から前進側ストロークエンド
に達するまでの間片傾転油ポンプの傾転角を小さくして
主油圧ピストンの前進速度を減速させるように補正する
指令と主油圧ピストンを前進側ストロークエンドから所
要量後退させるまでの間片傾転油ポンプの傾転角を大き
くして元に戻すようにする指令とを発するようにした制
御器を有する構成とした往復動型粘性流体ポンプの運転
制御装置とすることにより、両傾転油ポンプを用いる場
合の如き複雑な回路構成とすることなく、脈動を効果的
に低減することができる。(2) The pressure oil discharged from the one-sided tilt oil pump is alternately supplied to the two main hydraulic cylinders for pressure-feeding the viscous fluid so that the main hydraulic piston of either one of the main hydraulic cylinders moves forward. When the stroke end is reached, in the operation control unit of the reciprocating viscous fluid pump that switches the intake and discharge valves and switches the forward and backward movements of the main hydraulic piston in the reverse direction, the forward stroke end of the main hydraulic cylinder A proximity sensor is installed at a position a required amount before the position, and the main hydraulic piston moves from the position of the proximity sensor to the forward stroke end based on the operation signal of the proximity sensor that operates when the main hydraulic piston moves forward. Until this is reached, a command and a main hydraulic piston are applied to correct the tilt angle of the one-sided oil pump to decrease the forward speed of the main hydraulic piston. Reciprocating viscosity with a controller configured to issue a command to increase the tilt angle of the one-sided tilt oil pump and return it to the original position from the forward stroke end to the required retraction By using the operation control device for the fluid pump, it is possible to effectively reduce pulsation without using a complicated circuit configuration as in the case of using the both-tilt oil pump.
【００２７】(3)片傾転油ポンプの傾転角を小さくして
主油圧ピストンの前進速度を減速させるための補正時間
を、運転速度に応じて選定するようにした構成とするこ
とにより、あらゆる運転速度においても、主油圧ピスト
ンの切り換え時における速度を最適に制御することがで
きる。(3) The correction time for reducing the tilting angle of the one-sided tilting oil pump to reduce the forward speed of the main hydraulic piston is selected according to the operating speed. The speed at the time of switching the main hydraulic piston can be optimally controlled at any operating speed.
【図１】本発明の往復動型粘性流体ポンプの運転制御装
置の実施の一形態を示すもので、コンクリートポンプへ
の採用例を示す概略図である。FIG. 1 shows an embodiment of an operation control device for a reciprocating viscous fluid pump of the present invention, and is a schematic diagram showing an example of its application to a concrete pump.
【図２】本発明で採用するポンプ運転フローチャートで
ある。FIG. 2 is a pump operation flow chart adopted in the present invention.
【図３】本発明で採用するポンプ運転タイムチャートで
ある。FIG. 3 is a pump operation time chart adopted in the present invention.
【図４】往復動型粘性流体ポンプの一例を示すコンクリ
ートポンプの概略図である。FIG. 4 is a schematic view of a concrete pump showing an example of a reciprocating viscous fluid pump.
６ａ，６ｂ 主油圧シリンダ ７ａ，７ｂ 主油圧ピストン ９ 揺動管（吸入吐出弁） １７ 片傾転油ポンプ ２３ 制御器 ＬＳ．３，ＬＳ．４ 近接センサ ｘ 前進側ストロークエンド位置 ｙ 手前の位置 6a, 6b Main hydraulic cylinder 7a, 7b Main hydraulic piston 9 Swing pipe (suction / discharge valve) 17 One-sided oil pump 23 Controller LS. 3, LS. 4 Proximity sensor x Forward stroke end position y Position in front
フロントページの続き Ｆターム(参考） 3H045 AA03 AA04 AA12 AA16 AA22 BA19 BA38 CA13 DA25 DA38 DA47 EA12 EA26 EA33 EA43 3H075 AA12 BB03 BB14 BB16 BB20 BB24 CC03 CC17 DA07 DA14 DB23 DB42 EE08 EE12 EE14 EE18 Continued front page F term (reference) 3H045 AA03 AA04 AA12 AA16 AA22 BA19 BA38 CA13 DA25 DA38 DA47 EA12 EA26 EA33 EA43 3H075 AA12 BB03 BB14 BB16 BB20 BB24 CC03 CC17 DA07 DA14 DB23 DB42 EE08 EE12 EE14 EE18
Claims (3)
に片傾転油ポンプから吐出された圧油を交互に供給し
て、いずれか一方の主油圧シリンダの主油圧ピストンが
前進側ストロークエンドに達すると、吸入吐出弁を切り
換えるようにすると共に主油圧ピストンの前進後退を逆
方向に切り換えるようにしてある往復動型粘性流体ポン
プの運転制御方法において、主油圧ピストンが前進して
前進側ストロークエンドよりも所要量手前の位置に到着
すると、該位置から前進側ストロークエンドに達するま
での間、当該主油圧ピストンの前進速度を減速させるよ
うにし、しかる後、吸入吐出弁が切り換えられてから、
主油圧ピストンを所要量後退させる間に、当該主油圧ピ
ストンの後退速度を増速させて元に戻すようにすること
を特徴とする往復動型粘性流体ポンプの運転制御方法。1. A main hydraulic piston of one of the main hydraulic cylinders is provided with a forward stroke by alternately supplying pressure oil discharged from a one-sided tilt oil pump to two main hydraulic cylinders for viscous fluid pressure feed. When it reaches the end, in the operation control method of the reciprocating viscous fluid pump in which the intake / discharge valve is switched and the forward / backward movement of the main hydraulic piston is switched in the reverse direction, the main hydraulic piston moves forward and moves forward. When the vehicle arrives at a position that is a required amount before the stroke end, the forward speed of the main hydraulic piston is decelerated until it reaches the forward stroke end from that position, and thereafter, after the intake / discharge valve is switched. ,
An operation control method for a reciprocating viscous fluid pump, characterized in that while the main hydraulic piston is retracted by a required amount, the retreat speed of the main hydraulic piston is increased and returned to the original value.
に片傾転油ポンプから吐出された圧油を交互に供給し
て、いずれか一方の主油圧シリンダの主油圧ピストンが
前進側ストロークエンドに達すると、吸入吐出弁を切り
換えるようにすると共に主油圧ピストンの前進後退を逆
方向に切り換えるようにしてある往復動型粘性流体ポン
プの運転制御装置において、主油圧シリンダの前進側ス
トロークエンド位置よりも所要量手前の位置に近接セン
サを設置し、且つ主油圧ピストンが前進したときに作動
する上記近接センサの作動信号に基づいて当該主油圧ピ
ストンが近接センサの位置から前進側ストロークエンド
に達するまでの間片傾転油ポンプの傾転角を小さくして
主油圧ピストンの前進速度を減速させるように補正する
指令と主油圧ピストンを前進側ストロークエンドから所
要量後退させるまでの間片傾転油ポンプの傾転角を大き
くして元に戻すようにする指令とを発するようにした制
御器を有する構成としたことを特徴とする往復動型粘性
流体ポンプの運転制御装置。2. The main hydraulic piston of one of the main hydraulic cylinders is supplied to the two main hydraulic cylinders for feeding viscous fluid alternately with the pressure oil discharged from the one-sided tilt oil pump, and the main hydraulic piston of one of the main hydraulic cylinders moves forward. When the end is reached, in the operation control device of the reciprocating viscous fluid pump that switches the intake / discharge valve and switches the forward / backward movement of the main hydraulic piston in the reverse direction, the forward stroke end position of the main hydraulic cylinder A proximity sensor is installed at a position before the required amount, and the main hydraulic piston reaches the forward stroke end from the position of the proximity sensor based on the operation signal of the proximity sensor that operates when the main hydraulic piston moves forward. Between the main oil pressure piston and the command to correct the forward speed of the main oil pressure piston by reducing the tilt angle of the one-sided oil pump. Is configured to have a controller configured to issue a command to increase the tilt angle of the one-sided tilt oil pump and restore it from the forward stroke end to the required amount of backward movement. A reciprocating viscous fluid pump operation control device.
油圧ピストンの前進速度を減速させるための補正時間
を、運転速度に応じて選定するようにした請求項２記載
の往復動型粘性流体ポンプの運転制御装置。3. The reciprocating motion according to claim 2, wherein a correction time for reducing the tilt angle of the one-sided tilt oil pump to reduce the forward speed of the main hydraulic piston is selected according to the operating speed. Type viscous fluid pump operation controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002016889A JP4129761B2 (en) | 2002-01-25 | 2002-01-25 | Operation controller for reciprocating viscous fluid pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002016889A JP4129761B2 (en) | 2002-01-25 | 2002-01-25 | Operation controller for reciprocating viscous fluid pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003214332A true JP2003214332A (en) | 2003-07-30 |
| JP4129761B2 JP4129761B2 (en) | 2008-08-06 |
Family
ID=27652783
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002016889A Expired - Lifetime JP4129761B2 (en) | 2002-01-25 | 2002-01-25 | Operation controller for reciprocating viscous fluid pump |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2007048297A1 (en) * | 2005-10-28 | 2007-05-03 | Sany Heavy Industry Co., Ltd. | An oil-supplementing method and apparatus for cylinders which are connected in series |
| JP2007138817A (en) * | 2005-11-17 | 2007-06-07 | Kyokuto Kaihatsu Kogyo Co Ltd | Control apparatus of piston concrete pump |
| JP2008163786A (en) * | 2006-12-27 | 2008-07-17 | Kyokuto Kaihatsu Kogyo Co Ltd | Control device for piston concrete pump |
| WO2011116702A1 (en) * | 2010-03-24 | 2011-09-29 | 长沙中联重工科技发展股份有限公司 | Tandem hydraulic cylinders and stroke control device and method thereof |
| WO2012088826A1 (en) * | 2010-12-28 | 2012-07-05 | 长沙中联重工科技发展股份有限公司 | Methods for controlling concrete pump to pump again and to reversely pump after shutdown |
| JP2013194562A (en) * | 2012-03-16 | 2013-09-30 | Kyokuto Kaihatsu Kogyo Co Ltd | Concrete pump |
| WO2014000378A1 (en) * | 2012-06-28 | 2014-01-03 | 中联重科股份有限公司 | Concrete pumping device, and travel control apparatus and method for series oil cylinder |
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| CN110657137A (en) * | 2019-10-25 | 2020-01-07 | 上海同臣环保有限公司 | Oil leakage detection method for hydraulic system of oil cylinder squeezer |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007048297A1 (en) * | 2005-10-28 | 2007-05-03 | Sany Heavy Industry Co., Ltd. | An oil-supplementing method and apparatus for cylinders which are connected in series |
| JP2007138817A (en) * | 2005-11-17 | 2007-06-07 | Kyokuto Kaihatsu Kogyo Co Ltd | Control apparatus of piston concrete pump |
| JP2008163786A (en) * | 2006-12-27 | 2008-07-17 | Kyokuto Kaihatsu Kogyo Co Ltd | Control device for piston concrete pump |
| WO2011116702A1 (en) * | 2010-03-24 | 2011-09-29 | 长沙中联重工科技发展股份有限公司 | Tandem hydraulic cylinders and stroke control device and method thereof |
| WO2012088826A1 (en) * | 2010-12-28 | 2012-07-05 | 长沙中联重工科技发展股份有限公司 | Methods for controlling concrete pump to pump again and to reversely pump after shutdown |
| JP2013194562A (en) * | 2012-03-16 | 2013-09-30 | Kyokuto Kaihatsu Kogyo Co Ltd | Concrete pump |
| WO2014000378A1 (en) * | 2012-06-28 | 2014-01-03 | 中联重科股份有限公司 | Concrete pumping device, and travel control apparatus and method for series oil cylinder |
| EP2799712A3 (en) * | 2013-05-02 | 2014-11-12 | MPS-Matter Pumpsysteme GmbH | Viscous material pump |
| DE102013104494B4 (en) | 2013-05-02 | 2023-11-30 | MPS-Matter Pumpsysteme GmbH | Thick matter pump |
| CN110657137A (en) * | 2019-10-25 | 2020-01-07 | 上海同臣环保有限公司 | Oil leakage detection method for hydraulic system of oil cylinder squeezer |
| KR20230165632A (en) * | 2022-05-27 | 2023-12-05 | 주식회사 현대에버다임 | Boom bouncing suppressing device using poh valve time control and concrete pump truck include this same |
| KR102666183B1 (en) * | 2022-05-27 | 2024-05-16 | 주식회사 현대에버다임 | Boom bouncing suppressing device using poh valve time control and concrete pump truck include this same |
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