JP2007278310A - Fixed capacity pulse cylinder type flow control device - Google Patents

Fixed capacity pulse cylinder type flow control device Download PDF

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JP2007278310A
JP2007278310A JP2006101330A JP2006101330A JP2007278310A JP 2007278310 A JP2007278310 A JP 2007278310A JP 2006101330 A JP2006101330 A JP 2006101330A JP 2006101330 A JP2006101330 A JP 2006101330A JP 2007278310 A JP2007278310 A JP 2007278310A
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cylinder
double
constant
control device
speed
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Akira Tane
彰 種子
Hiroaki Ueno
上野廣彬
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Kyoritsu Kogyo KK
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Kyoritsu Kogyo KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixed capacity pulse cylinder type flow control device for minimizing the energy loss of a throttle valve by more easily and accurately controlling a flow amount of discharge from an accumulator to actualize variable control of a cylinder speed and position, although a conventional hydraulic flow control method uses a throttle valve only for narrowing a flow path cross section where there is a pressure difference between the front and rear sides thereof and a flow speed is changed to generate vibration, abnormal noises, and heat, resulting in inevitable energy loss. <P>SOLUTION: In a control circuit and its control method, an actuator is driven on a pulse basis while discharging a fixed amount of liquid by alternately moving small size double acting cylinders and the actuator is freely controlled to be operated at a target speed or stopped at a target position while elongating a driving interval in the direction of a time axis by reducing the speed with high pressure. Besides, a method is provided which alternately uses this invention to form a non-pulsation fixed capacity pump or uses the plurality of pumps installed in parallel to be partially operated for easily controlling a flow amount in a well responsive manner. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、蓄圧アキュムレータを気体と液体を同一の個体容器に収納し、液体のみを当該容器から入出力できる構造にしたものと定義し、液体ポンプにより加圧した時に当該容器が破損せずに蓄圧可能で、当該液体の圧力差を利用することを目的とするものとして説明する。 The present invention defines a pressure accumulator as a structure in which gas and liquid are stored in the same solid container and only liquid can be input and output from the container, and the container is not damaged when pressurized by a liquid pump. A description will be given assuming that pressure accumulation is possible and the purpose is to utilize the pressure difference of the liquid.

液体として油や水等が、気体として常温や高温で液化しにくい窒素ガスやアルゴンガスが一般に用いられているが、説明の都合と理解の容易さと且つ物性と経済性を考慮して、以下では油と窒素ガスで説明している。 Oil or water is generally used as the liquid, and nitrogen gas or argon gas that is difficult to be liquefied at room temperature or high temperature is generally used as the gas.However, in consideration of the convenience of explanation and ease of understanding, and physical properties and economics, Explained in oil and nitrogen gas.

本発明は、蓄圧アキュムレータからの吐出量を一定量に制御する装置に関している。 The present invention relates to an apparatus for controlling a discharge amount from a pressure accumulator to a constant amount.

本発明は、シリンダの位置を高精度に制御する位置制御装置に関している。 The present invention relates to a position control device that controls the position of a cylinder with high accuracy.

更に、本発明は、エネルギーロスの少ない流量制御装置にも関している。 Furthermore, the present invention also relates to a flow control device with low energy loss.

従来の油圧装置の流量制御方法としては、絞り弁と流量調整弁、デセラレーション弁やフィールドコントロール弁、パイロット操作流量調整弁やパワーセービング弁、ニードル弁などが挙げられるが、全て絞り弁であった。 Conventional hydraulic device flow control methods include a throttle valve and flow control valve, a deceleration valve, a field control valve, a pilot operation flow control valve, a power saving valve, a needle valve, etc., all of which are throttle valves. It was.

これらの弁は基本的に流路断面積の縮小を利用しており、弁前後の圧力差発生と発熱による油温上昇、振動やうなり音などの大幅なエネルギーロスが避けられないという、根本的な問題を持っていた。 These valves basically use a reduction in the cross-sectional area of the flow path, and a fundamental energy loss is unavoidable, such as pressure difference generation before and after the valve, oil temperature rise due to heat generation, vibration and beat noise, etc. Had a serious problem.

しかし、油圧機器は機械製造等の様な一定負荷とは限らずに、エレベーターの加重やクレーンの巻上げの様に荷重範囲が変動したり、パワーショベルの掘削反力の様にワンストローク中の負荷変動まで、色々な場合の利用が考えられる。 However, the hydraulic equipment is not limited to a constant load such as machine manufacturing, but the load range fluctuates such as elevator load or crane hoisting, or the load during one stroke such as excavation reaction force of a power shovel. It can be used in various cases up to fluctuations.

エンジン直結の多段可変容量ピストンポンプの閉回路でシリンダを作動させる時で、パワーショベル掘削力の様にストローク中の負荷変動がある場合には、高負荷を予想してスロットルを上げていると、エンジン回転は高くなりポンプからの吐出量が多くなり、騒音と燃料消費量も増加するだけでなく、低負荷時には操作レバーの同じ開度でシリンダ速度も増すために、方向切替え弁の開度も微妙に操作する必要があり、更に切替え弁での漏れ油量と油音温上昇もばかにならない。 When the cylinder is operated in a closed circuit of a multistage variable displacement piston pump directly connected to the engine, and there is a load fluctuation during the stroke, such as a power shovel excavation force, if the throttle is raised in anticipation of a high load, Not only does the engine speed increase, the pump discharge increases, the noise and fuel consumption increase, but the cylinder speed increases with the same opening of the control lever at low loads, so the opening of the direction switching valve also increases. It is necessary to operate delicately, and the amount of oil leaked by the switching valve and the rise in the oil sound temperature are not ridiculous.

高回転にしていないと、掘削中に礫や石に当たって過負荷の時にエンストなどが多発して仕事にならない。 If it is not set to high rotation, it will not work due to frequent engine stalls when it hits gravel and stones during excavation.

この騒音を低下させエネルギーロスも少なくする為に、軽量型アキュムレータを採用しする事で、ポンプ容量も削減可能な極低騒音ショベルカー等が実現された。 In order to reduce this noise and reduce energy loss, an ultra-low noise excavator that can reduce pump capacity has been realized by adopting a lightweight accumulator.

その油圧アキュムレータでの蓄積エネルギーEは、圧力Pと吐出量Vの積で与えられる為、余分なエネルギーを効率的に蓄積する為には、容量が装置に制限されるために、蓄積圧力は所要圧力の数倍以上と成る事も有る。 Since the accumulated energy E in the hydraulic accumulator is given by the product of the pressure P and the discharge amount V, the accumulated pressure is required because the capacity is limited to the device in order to efficiently store excess energy. Sometimes it is more than several times the pressure.

その場合、高圧アキュムレータからそのままの高圧をシリンダに送ると、早く動き過ぎたり強すぎたりコントロールが難しく、製品やシリンダが破損する恐れがある。 In that case, if the high pressure is sent from the high pressure accumulator to the cylinder as it is, it will move too quickly or too strongly, it will be difficult to control, and the product or cylinder may be damaged.

アキュムレータを複数個用意し、差圧を一定値の整数倍とし、順次交互に低圧に向けて切替え作動させる方式も考えられるが、複動シリンダの断面積を左右同じ値にする必要があり寸法が伸びる事と、1シリンダに複数個のアキュムレータを用意してまでエネルギー節約をする程の意味も無い。 It is possible to prepare a plurality of accumulators, set the differential pressure to an integral multiple of a constant value, and switch the operation alternately toward low pressure.However, the cross-sectional area of the double-acting cylinder must be the same value on the left and right. There is no point in extending energy and saving energy until multiple accumulators are prepared per cylinder.

一般に、切替えバルブの操作は、特にウオーターハンマーを発生させない様に、ゆっくり開き、ゆっくり締める必要がある。 In general, the operation of the switching valve needs to be slowly opened and tightened so as not to generate a water hammer.

シリンダへの位置微調整の為に、直接に方位切り替え弁等を瞬間的に作動・停止させる方法は、特に高圧油圧バルブの故障や誤動作の原因となるだけではなく、破壊や事故につながり、材料疲労を考慮しても得策ではない。 In order to finely adjust the position of the cylinder, the method of instantaneously actuating and stopping the directional switching valve, etc., not only causes a failure or malfunction of the high-pressure hydraulic valve, but also leads to destruction and accidents. Considering fatigue is not a good idea.

本発明は、より簡単で且つ正確に流量を調節し、シリンダ速度と位置の制御を可変自由に実現する事と、絞り弁等のエネルギーロスを極力削減する事を目的としている。
An object of the present invention is to more easily and accurately adjust the flow rate, to realize variable and free control of cylinder speed and position, and to reduce energy loss of a throttle valve or the like as much as possible.

本発明は、エンジン駆動多段ピストン型油圧ポンプで蓄圧アキュムレータに蓄圧して、蓄圧アキュムレータから一定容量の液体をパルス的に送り出す定容量パルスシリンダのパルス間隔を任意に変えて油圧シリンダを制御する装置で、変動負荷の高負荷時のエンジン騒音レベルを低減することも目的としている。 The present invention is an apparatus for controlling a hydraulic cylinder by arbitrarily changing the pulse interval of a constant-capacity pulse cylinder that accumulates pressure in an accumulator with an engine-driven multi-stage piston type hydraulic pump and sends a constant volume of liquid in a pulsed manner from the accumulator. It is also aimed to reduce the engine noise level when the load is variable and high.

本発明は、小型複動シリンダを、交互に移動させて一定量の液体を吐出させながら、パルス的にアクチュエータを駆動し、高圧による速度を低減して、時間軸方向への駆動間隔の延長により、アクチュエータを目的の速度や位置への停止など、自在な制御を行う制御方法を提供する事を特徴とする。 In the present invention, a small double-acting cylinder is alternately moved to discharge a fixed amount of liquid, and the actuator is driven in a pulsed manner to reduce the speed due to high pressure, thereby extending the driving interval in the time axis direction. The present invention is characterized by providing a control method for performing free control such as stopping the actuator to a target speed or position.

例えば、作動させるアクチュエータ(シリンダ等)と、小型複動シリンダの断面積比が100倍であれば、その小型複動シリンダの1ストローク長が50mmとしても、アクチュエータのロッドは50mm/100=0.5mmしか移動しない事になり、アクチュエータ位置制御には精度向上となる。 For example, if the cross-sectional area ratio of an actuator to be actuated (such as a cylinder) and a small double acting cylinder is 100 times, even if the stroke length of the small double acting cylinder is 50 mm, the rod of the actuator is 50 mm / 100 = 0. Only 5 mm is moved, and the accuracy of the actuator position control is improved.

逆に、アクチュエータのロッドを200mm移動させる為には200/0.5=400ストローク、200往復必要の為長時間掛かり、且つ磨耗も考慮する必要がある。 On the contrary, in order to move the rod of the actuator by 200 mm, 200 / 0.5 = 400 strokes, 200 reciprocations are required, so it takes a long time and it is necessary to consider wear.

この値は、小型の他に中型の異なる断面積の複動シリンダを並列に切り替えて制御する事で制御時間が長く掛かる問題も防止できて、更に仕様にあわせた寸法や面積を任意に決定できるし、複数個の複動シリンダ併用でも問題防止が可能である。 In addition to the small size, this value can be controlled by switching the double-acting cylinders with different cross-sectional areas of medium size in parallel to prevent the problem of long control time, and the size and area according to the specifications can be determined arbitrarily. However, problems can be prevented even when a plurality of double-acting cylinders are used together.

この様に、小型複動シリンダを、交互に移動させながら、パルス的にアクチュエータを駆動し、高圧による速度を低減しながら、時間軸方向への駆動間隔の延長により、アクチュエータを目的の速度や位置への停止などのコントロールが任意に精度良く可能となる。 In this way, the actuator is driven in pulses while alternately moving small double-acting cylinders, reducing the speed due to high pressure, and extending the drive interval in the time axis direction to move the actuator to the desired speed and position. Control such as stopping at any time is possible with high accuracy.

作動させるシリンダを一定位置(フルストロークでなく)まで全力で動かし、そのあとに、前後に微調整したい場合などでは、複動シリンダの容積を、そのシリンダの一定位置までの油糧に合わせて選択すれば、何度でも同一精度で当該シリンダ移動量をコントロールできる。 If you want to move the cylinder to be operated at full force to a certain position (not full stroke) and then finely adjust it back and forth, select the volume of the double-acting cylinder according to the oil up to the certain position of the cylinder. Then, the cylinder movement amount can be controlled with the same accuracy any number of times.

又、該複動シリンダが他端までの移動する時間Txより少し長い時間Taを考慮すると、Taより長周期の任意パルス間隔で、当該アクチュエータへの液体流量(駆動速度)を制御し任意の速度や位置のコントロールが任意に可能となる。Ta>Tx Also, considering the time Ta slightly longer than the time Tx during which the double-acting cylinder moves to the other end, the liquid flow rate (drive speed) to the actuator is controlled at an arbitrary pulse interval longer than Ta, and the arbitrary speed Control of position and position is possible arbitrarily. Ta> Tx

これまでの回路で示す様に、複動シリンダと電磁切替え弁だけなので、流量制御弁の様な絞り弁や流路断面積の減少が無いために、熱と振動や音に変わるエネルギーロスが低減される。 As shown in the previous circuit, there is only a double-acting cylinder and an electromagnetic switching valve, so there is no reduction in the throttle valve and flow path cross-sectional area like a flow control valve, reducing energy loss that changes to heat, vibration, and sound. Is done.

この様に、小型複動シリンダや中型複動シリンダを並列に配置し、同時に又は片方だけ、交互に移動させながら、、パルス的にアクチュエータを駆動し、高圧による速度を低減して、時間軸方向への駆動間隔の延長により、アクチュエータを目的の速度や位置への停止などのコントロールが任意に精度良く可能となる。 In this way, small double-acting cylinders and medium-sized double acting cylinders are arranged in parallel, and at the same time or only one side, while moving alternately, the actuator is driven in pulses, the speed due to high pressure is reduced, and the time axis direction By extending the drive interval, control such as stopping the actuator at a desired speed or position can be performed with high accuracy.

複動シリンダは、左右が同一断面積でなくてもパルス駆動という意味では、熱エネルギー削減は同様であり、又一往復分では定容量パルスとなるため、本発明の本質は変わらない。 In the double-acting cylinder, even if the left and right are not of the same cross-sectional area, the heat energy reduction is the same in the sense of pulse driving, and the constant capacity pulse is obtained in one reciprocation, so the essence of the present invention does not change.

同一容積の複動シリンダを二つ並列配置し、一つの複動シリンダ移動時間をTxとすると、停止時間もTxとして二つを交互に液体をパルス出力する事で、連続吐出も可能となる。(実施例4に示す。) When two double-acting cylinders of the same volume are arranged in parallel and one double-acting cylinder moving time is Tx, continuous discharge is also possible by alternately outputting two liquid pulses with a stop time Tx. (Shown in Example 4)

図1は、本発明装置の実施例1の油圧回路図であって、蓄圧アキュムレータ5が原動機2に駆動される可変容量油圧ピストンポンプ3によって加圧され、逆流防止弁6で油圧が供給される。 FIG. 1 is a hydraulic circuit diagram of Embodiment 1 of the device of the present invention, in which a pressure accumulator 5 is pressurized by a variable displacement hydraulic piston pump 3 driven by a prime mover 2 and hydraulic pressure is supplied by a backflow prevention valve 6. .

蓄圧アキュムレータ5には、鋼製容器内部にピストンにより隔離された窒素ガス室と反対側に油の入るピストン型アキュムレータか、鋼製容器内に窒素ガス室が入った風船の外側に油が充満しているプラダ型アキュムレータのどちらも使用可能である。 The accumulator 5 is filled with oil on the outside of a balloon with a nitrogen gas chamber inside the steel container or a piston type accumulator in which oil enters the opposite side of the nitrogen gas chamber isolated by the piston. Both Prada type accumulators can be used.

一般にピストン型の方がプラダ型よりピストンの慣性移動分だけ応答速度が遅いとされている。 Generally, the response speed of the piston type is slower than the Prada type by the amount of inertia movement of the piston.

所定圧力より高くなった油は、直動型リリーフ弁4からドレンタンク1に直接戻る。 The oil that has become higher than the predetermined pressure returns directly from the direct acting relief valve 4 to the drain tank 1.

二つの逆流防止弁6の間に、複動シリンダ用方向切替え弁7と、その先に本発明の複動シリンダ10が配置されて、アクチュエータ(油圧シリンダ)25に向けて、油を一方向に送っている。 Between the two backflow prevention valves 6, a double-action cylinder direction switching valve 7 and a double-action cylinder 10 of the present invention are arranged at the tip of the double-action cylinder 10, and the oil is directed in one direction toward the actuator (hydraulic cylinder) 25. sending.

その油は、センタ保持機能付き手動スライド方向制御弁24を経由して、アクチュエータ(油圧シリンダ)25の押し引き両端に配管されており、戻り配管はドレンタンク1に戻っている。 The oil is piped to both ends of the actuator (hydraulic cylinder) 25 via a manual slide direction control valve 24 with a center holding function, and the return pipe is returned to the drain tank 1.

周期Taで、オン時間がTxの矩形波形の直流電圧で、ソレノイドを駆動すると最高周期の定容量パルス吐出が可能となる。 When the solenoid is driven with a DC voltage of a rectangular waveform with a period Ta and an on-time Tx, the constant-capacity pulse discharge with the maximum period can be performed.

しかし、交互にソレノイド8とソレノイド9に電圧を掛ける必要があり、且つ複動シリンダの位置により電圧を掛けるソレノイドを自動選択する必要がある。 However, it is necessary to alternately apply a voltage to the solenoid 8 and the solenoid 9, and it is necessary to automatically select a solenoid to apply a voltage depending on the position of the double-acting cylinder.

図2に示すシーケンス回路で、シリンダの位置をリミットスイッチで検出して、必要な側のソレノイドを作動させる様に工夫している。 The sequence circuit shown in FIG. 2 is devised so that the position of the cylinder is detected by a limit switch and the solenoid on the required side is operated.

図3には、そのタイムチャートを示す。 FIG. 3 shows the time chart.

Txは、本発明の複動パルスシリンダ10がその圧力での移動時間であり、Taはその周期(sec)である。 Tx is the moving time of the double-action pulse cylinder 10 of the present invention at that pressure, and Ta is its period (sec).

従って、一分間に供給される油の量Vリットルは、複動シリンダ10の一ストロークの容量をvリットルとすると、V=60/Ta×vリットルで計算される。 Accordingly, the amount of oil V liter supplied per minute is calculated as V = 60 / Ta × v liter, where the capacity of one stroke of the double acting cylinder 10 is v liter.

直動型リリーフ弁4の代わりに、圧力スイッチとリリーフ弁でも可能である。 Instead of the direct acting relief valve 4, a pressure switch and a relief valve are also possible.

本発明の定容量パルスシリンダ(小・中併用)型流量制御装置の実施例を図4に示す。 FIG. 4 shows an embodiment of a constant-capacity pulse cylinder (small / medium combined) flow control device of the present invention.

複動パルスシリンダ10は、アクチュエータ(油圧シリンダ)を精度良くコントロールできるが、逆に移動速度が遅いという問題点があり、中型複動パルスシリンダ35(容積が10〜100倍程度)と併用することでそれを解決可能である。 The double-acting pulse cylinder 10 can control the actuator (hydraulic cylinder) with high accuracy, but there is a problem that the moving speed is slow, and it is used together with the medium-sized double-acting pulse cylinder 35 (volume is about 10 to 100 times). It is possible to solve it.

他の配管と操作は、図1と同じであり、機能も同等です。 Other piping and operations are the same as in Fig. 1, and the functions are the same.

連続吐出が必要な場合は、図5に示す本発明の定容量連続シリンダ型流量装置を使用する。必要な吐出量から逆算した複動パルスシリンダ10を二つ組み合わせて、交互に供給して、定容量ポンプとして使用が可能である。 When continuous discharge is required, the constant capacity continuous cylinder type flow device of the present invention shown in FIG. 5 is used. Two double-acting pulse cylinders 10 calculated backward from the required discharge amount can be combined and supplied alternately to be used as a constant capacity pump.

定容量パルスシリンダ複数型流量制御装置を図6に示す。 A constant-capacity pulse cylinder multiple flow control device is shown in FIG.

複数型の特徴は、複動パルスシリンダ10を例えば10個並列に並べて設置し、例えば7個動かせば7割の流量、3個動かせば3割の流量と簡単に流量を変更可能であり、精度と再現性が高い。 The feature of multiple types is that, for example, 10 double-acting pulse cylinders 10 are arranged in parallel, and for example, if 7 are moved, the flow rate can be easily changed to 70% flow rate, and if 3 are moved, 30% flow rate. And reproducibility is high.

Taの周期を変更する場合は、人間が簡便にコントロールできず、周波数をマイコンで制御する必要がある。 When changing the Ta cycle, humans cannot easily control the frequency, and the frequency must be controlled by a microcomputer.

従来の建設用土木機械は、原動機で直接ピストン油圧ボンプを駆動し、手動スライド弁を用いて、油圧シリンダを直接駆動するという油圧閉回路であり、高負荷時は最大エンジン負荷となり騒音も高かった。 The conventional civil engineering machine for construction is a closed hydraulic circuit in which a piston hydraulic pump is directly driven by a prime mover, and a hydraulic cylinder is directly driven by using a manual slide valve. When the load is high, the engine load becomes maximum and the noise is high. .

アキュムレータを採用すると、静音性が向上するが、絞り弁を多用するとエネルギーロスが発生して、油の温度が上昇して粘性が変わり、油量が一定となら無い。 When the accumulator is used, the noise is improved. However, if the throttle valve is used frequently, energy loss occurs, the temperature of the oil rises, the viscosity changes, and the amount of oil does not become constant.

その為にオイルクーラーが必要となるという、悪循環が発生してしまう。 This creates a vicious circle that requires an oil cooler.

しかし、本発明の定容量パルスシリンダ型流量制御装置により、絞り弁が不要な流量制御装置が得られた。 However, the constant-capacity pulse cylinder type flow control device of the present invention provides a flow control device that does not require a throttle valve.

更に、パルスが無い連続流量の制御装置も可能であり、また複数型と組み合わせる事により、任意の回路に利用可能な流量制御装置が得られた。 Furthermore, a continuous flow rate control device without a pulse is possible, and by combining with a plurality of types, a flow rate control device that can be used in any circuit has been obtained.

本発明の定容量パルスシリンダ型流量制御装置の実施例。(実施例1)1 shows an embodiment of a constant capacity pulse cylinder type flow control device of the present invention. Example 1 本発明の定容量パルスシリンダ型流量制御装置実施例のシーケンス回路図。(実施例1)The sequence circuit diagram of the constant capacity pulse cylinder type | mold flow control apparatus Example of this invention. Example 1 本発明の定容量パルスシリンダ型流量制御装置実施例のタイムチャートを示す。(実施例1)The time chart of the constant capacity pulse cylinder type | mold flow control apparatus Example of this invention is shown. Example 1 本発明の定容量パルスシリンダ(小・中併用)型流量制御装置の実施例。(実施例2)1 shows an embodiment of a constant-capacity pulse cylinder (small / medium combined) flow control device of the present invention. (Example 2) 本発明の定容量連続シリンダ型流量制御装置の実施例。(実施例3)1 shows an embodiment of a constant capacity continuous cylinder flow control device of the present invention. (Example 3) 本発明の定容量パルスシリンダ複数型流量制御装置の実施例(10-1〜10-3まで記入 必要に応じて10個程度並列にする)。(実施例4)Example of constant-capacity pulse cylinder multiple flow control device according to the present invention (fill in 10-1 to 10-3, about 10 in parallel if necessary). (Example 4)

符号の説明Explanation of symbols

1 ドレンタンク
2 原動機
3 可変容量油圧ピストンポンプ
4 直動型リリーフ弁
5 蓄圧アキュムレータ
6 逆流防止弁
7 複動シリンダ用方向制御電磁切替え弁
7a 複動シリンダ用方向制御電磁切替え弁クロス
7b 複動シリンダ用方向制御電磁切替え弁ストレート
7c 複動シリンダ用方向制御電磁切替え弁ストップ
8 複動シリンダ用ソレノイド(SLa)
9 複動シリンダ用ソレノイド(SLb)
10 複動パルスシリンダ
10' 複動連続シリンダ
11 複動ピストン
11' 複動連続ピストン
12 複動ロッド左
13 複動ロッド右
14 緩衝バネ左
15 緩衝バネ右
16 リミットスイッチ左端(LS1)
17 リミットスイッチ左中(LS2)
18 リミットスイッチ右中(LS3)
19 リミットスイッチ右端(LS4)
20 LS5リミットスイッチ左
21 LS6リミットスイッチ右
22 オペレータ用操作ノブ
23 操作ロッド
24 センタ保持機能付き手動スライド方向制御弁
24aセンタ保持機能付き手動スライド方向制御弁クロス
24bセンタ保持機能付き手動スライド方向制御弁ストレート
24cセンタ保持機能付き手動スライド方向制御弁ストップ
25 アクチュエータ(油圧シリンダ)
26 油圧ロッド
27 油圧ピストン
28 複動シリンダ中型用方向制御電磁切替え弁
28‘複動連続シリンダ用方向制御電磁切替え弁
29 複動シリンダ中型用ソレノイド(SLa)
29‘複動連続シリンダ中型用ソレノイド(SLa)
30 複動シリンダ中型用ソレノイド(SLb)
30‘複動連続シリンダ用ソレノイド(SLb)
31 リミットスイッチ左端(LS7)
32 リミットスイッチ左中(LS8)
33 リミットスイッチ右中(LS9)
34 リミットスイッチ右端(LS10)
35 複動中型シリンダ
36 複動中型ピストン
DESCRIPTION OF SYMBOLS 1 Drain tank 2 Prime mover 3 Variable capacity hydraulic piston pump 4 Direct acting type relief valve 5 Accumulation accumulator 6 Backflow prevention valve 7 Direction control solenoid switching valve 7a for double acting cylinder Direction control solenoid switching valve cross 7b for double acting cylinder For double acting cylinder Directional control solenoid switching valve straight 7c Directional control solenoid switching valve stop for double acting cylinder 8 Solenoid for double acting cylinder (SLa)
9 Solenoid for double acting cylinder (SLb)
10 Double-acting pulse cylinder 10 'Double-acting continuous cylinder 11 Double-acting piston 11' Double-acting continuous piston 12 Double-acting rod left 13 Double-acting rod right 14 Buffer spring left 15 Buffer spring right 16 Limit switch left end (LS1)
17 Limit switch left middle (LS2)
18 Limit switch right middle (LS3)
19 Limit switch right end (LS4)
20 LS5 limit switch left 21 LS6 limit switch right 22 Operation knob 23 for operator Operating rod 24 Manual slide direction control valve 24a with center holding function Manual slide direction control valve with center holding function 24b Manual slide direction control valve straight with center holding function 24c Manual slide direction control valve stop with center holding function 25 Actuator (hydraulic cylinder)
26 Hydraulic Rod 27 Hydraulic Piston 28 Double Action Cylinder Medium Type Direction Control Electromagnetic Switching Valve 28 'Double Action Continuous Cylinder Direction Control Electromagnetic Switching Valve 29 Double Action Cylinder Medium Size Solenoid (SLa)
29 'Double Action Continuous Cylinder Medium Size Solenoid (SLa)
30 Double acting cylinder medium size solenoid (SLb)
30 'Solenoid for double acting continuous cylinder (SLb)
31 Limit switch left end (LS7)
32 Limit switch left middle (LS8)
33 Middle right limit switch (LS9)
34 Limit switch right end (LS10)
35 Double acting medium cylinder 36 Double acting medium piston

Claims (4)

蓄圧アキュムレータから一定容量の液体をパルス的に送り出す定容量パルスシリンダとその制御回路 Constant-capacity pulse cylinder that pumps out a constant volume of liquid from an accumulator and its control circuit 蓄圧アキュムレータから一定容量の液体をパルス的に送り出す定容量パルスシリンダを一定周期で作動させる定流量制御装置 A constant flow rate control device that operates a constant-capacity pulse cylinder that pulses a constant volume of liquid from a pressure accumulator in a constant cycle. 蓄圧アキュムレータから一定容量の液体をパルス的に送り出す定容量パルスシリンダのパルス間隔を任意に変えて流量を制御する流量制御装置 A flow rate control device that controls the flow rate by arbitrarily changing the pulse interval of a constant-capacity pulse cylinder that delivers a constant volume of liquid in a pulsed manner from an accumulator 蓄圧アキュムレータからの出力を、一定容量の液体をパルス的に送り出す往復シリンダを複数本並列に並べて同一周期で作動させた時に、その一部を作動させない事により流量を調節する流量制御装置
Flow rate control device that adjusts the flow rate by not operating some of the reciprocating cylinders that output the pressure accumulation accumulator in parallel with multiple reciprocating cylinders that deliver a constant volume of liquid in pulses
JP2006101330A 2006-04-03 2006-04-03 Fixed capacity pulse cylinder type flow control device Pending JP2007278310A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006101330A JP2007278310A (en) 2006-04-03 2006-04-03 Fixed capacity pulse cylinder type flow control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006101330A JP2007278310A (en) 2006-04-03 2006-04-03 Fixed capacity pulse cylinder type flow control device

Publications (1)

Publication Number Publication Date
JP2007278310A true JP2007278310A (en) 2007-10-25

Family

ID=38679959

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006101330A Pending JP2007278310A (en) 2006-04-03 2006-04-03 Fixed capacity pulse cylinder type flow control device

Country Status (1)

Country Link
JP (1) JP2007278310A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112000138A (en) * 2020-08-31 2020-11-27 北京七星华创流量计有限公司 Gas mass flow controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112000138A (en) * 2020-08-31 2020-11-27 北京七星华创流量计有限公司 Gas mass flow controller
CN112000138B (en) * 2020-08-31 2024-01-09 北京七星华创流量计有限公司 Gas mass flow controller

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