JPS6128425B2 - - Google Patents
Info
- Publication number
- JPS6128425B2 JPS6128425B2 JP1854782A JP1854782A JPS6128425B2 JP S6128425 B2 JPS6128425 B2 JP S6128425B2 JP 1854782 A JP1854782 A JP 1854782A JP 1854782 A JP1854782 A JP 1854782A JP S6128425 B2 JPS6128425 B2 JP S6128425B2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- pressure
- power source
- accumulator
- slab
- 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.)
- Expired
Links
- 238000003825 pressing Methods 0.000 claims description 36
- 238000009749 continuous casting Methods 0.000 claims description 11
- 230000002159 abnormal effect Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/08—Accessories for starting the casting procedure
Landscapes
- Fluid-Pressure Circuits (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】
この発明は連続鋳造機に関し、より詳しくは停
電等油圧圧力が異常に低下した際に連続鋳造鋳片
もしくはその鋳片に相応するダミーバーが落下す
ることを防止するための油圧回路に関するもので
ある。[Detailed Description of the Invention] This invention relates to a continuous casting machine, and more specifically, to a continuous casting machine for preventing continuous casting slabs or dummy bars corresponding to the slabs from falling in the event of an abnormal drop in hydraulic pressure such as a power outage. This relates to hydraulic circuits.
周知のように連続鋳造法は、鋳造開始当初にダ
ミーバーを鋳型内に挿入しておき、その状態で鋳
型内に溶湯を注入しつつこれを鋳型を介して冷却
し、同時にダミーバーをピンチロールによつて鋳
型から徐々に引き抜くことにより、冷却されて生
じた凝固シエル（鋳片）を鋳型から次第に引き抜
き、鋳片がある程度の長さになつた後は、ダミー
バーを鋳片から切離し、それ以降は鋳片をピンチ
ロールによつて連続的に鋳型から引き抜く方法で
ある。このような鋳造法を実施する連続鋳造機で
は、ダミーバーや鋳片が相当大重量であり、また
鋳型のクランプ、ダミーバーや鋳片の引き抜き、
鋳片の切断、切断された鋳片の搬送等の作業を適
切にコントロールする必要があり、しかもこれら
の作業箇所が個々に相当離れているので、出力が
大きく、また制御が容易である等の理由で、一般
にはこれらの作業の多くを油圧によつて行なつて
いる。例えば垂直型あるいは湾曲型の連続鋳造機
では、第１図に示すように、鋳型１の下方に多数
のガイドロール２とピンチロール３とを配列し、
これらによつてダミーバー４および鋳片５を案内
しつつ引き抜くよう構成し、そのピンチロール３
はダミーバー４および鋳片５を支持しかつ引き抜
くものであるから、所定の接触圧が生じるよう押
付用シリンダ６に取付けられており、またこのよ
うな連続鋳造機には、前記押付用シリンダ６以外
に、ダミーバー４の切離し用、鋳型１のクランプ
用、鋳型１の幅変更用、ガイドロール群の常時加
圧用等各種の油圧アクチエータ群７が設けられて
いる。 As is well known, in the continuous casting method, a dummy bar is inserted into the mold at the beginning of casting, the molten metal is injected into the mold and cooled through the mold, and at the same time the dummy bar is inserted into the mold using pinch rolls. By gradually pulling out the solidified shell (slab) from the mold, the solidified shell (slab) that has been cooled is gradually pulled out from the mold, and after the slab reaches a certain length, the dummy bar is separated from the slab. This is a method in which the pieces are continuously pulled out of the mold using pinch rolls. In a continuous casting machine that performs this type of casting method, the dummy bars and slabs are quite heavy, and there are many problems such as clamping the mold, pulling out the dummy bars and slabs,
It is necessary to properly control operations such as cutting slabs and transporting cut slabs, and since these work areas are far apart from each other, it is necessary to have large output and easy control. For this reason, many of these tasks are typically performed using hydraulics. For example, in a vertical or curved continuous casting machine, as shown in FIG. 1, a large number of guide rolls 2 and pinch rolls 3 are arranged below a mold 1.
The structure is such that the dummy bar 4 and slab 5 are guided and pulled out by these, and the pinch rolls 3
, which supports and pulls out the dummy bar 4 and the slab 5, is attached to the pressing cylinder 6 so as to generate a predetermined contact pressure. Various hydraulic actuator groups 7 are provided for separating the dummy bar 4, clamping the mold 1, changing the width of the mold 1, and constantly pressurizing the guide roll group.
ところで前記押付用油圧シリンダ６や油圧アク
チエータ群７に圧油を供給する油圧源ユニツト８
には、停電による油圧ポンプ９の停止や油圧回路
の異常、圧油のリーク、さらには電磁弁の無励磁
等による圧力低下を補い、またサージ圧の吸収、
エネルギの補助等のために、通常の油圧回路と同
様に、アキユムレータ（以下常設アキユムレー
タ）という）１０が設けられている。この常設ア
キユムレータ１０は、連続鋳造機に設けられた総
ての油圧アクチエータの圧力保償等のためのもの
であつて、その容量は相当大きいが、停電等の何
らかの原因で油圧の圧力が低下した場合に、常設
アキユムレータ１０に蓄油した圧油で圧力を保償
するとすると、油圧アクチエータ群やその制御弁
等圧油の漏洩する箇所が多数存在するから、数分
のうちに油圧の圧力が規定圧力以下に低下してし
まうおそれがあり、そこで従来一般には、ダミー
バー４や鋳片５の落下およびそれに伴う溶湯の流
出など極めて重大な被害を被むるおそれのある事
故を防止すべく、前記油圧源ユニツト８とは別
に、非常用の油圧源ユニツト１２を設けていた。
すなわち非常用油圧源ユニツト１２は、第１図に
その概略を示すように、前記油圧ポンプ９によつ
て蓄油されるアキユムレータ（以下非常用アキユ
ムレータという）１３を圧力源とするものであつ
て、この非常用アキユムレータ１３を流量調整弁
１４、電磁弁１５および逆止弁１６を順次介して
前記各押付用油圧シリンダ６に接続し、さらに取
付用シリンダ６の前段に設けた圧力スイツチ１７
の出力信号によつて前記電磁弁１５を動作させる
ようになつている。 By the way, a hydraulic source unit 8 supplies pressure oil to the pressing hydraulic cylinder 6 and the hydraulic actuator group 7.
In order to compensate for the pressure drop caused by the stoppage of the hydraulic pump 9 due to a power outage, abnormality in the hydraulic circuit, leakage of pressure oil, and even de-energization of the solenoid valve, it also absorbs surge pressure.
For energy assistance, etc., an accumulator (hereinafter referred to as permanent accumulator) 10 is provided as in a normal hydraulic circuit. This permanent accumulator 10 is used to guarantee the pressure of all the hydraulic actuators installed in the continuous casting machine, and although its capacity is quite large, if the hydraulic pressure drops due to some reason such as a power outage, etc. In this case, if the pressure is guaranteed by the pressure oil stored in the permanently installed accumulator 10, there are many places where pressure oil leaks, such as the hydraulic actuator group and its control valves, so the hydraulic pressure will reach the specified level within a few minutes. Therefore, in order to prevent accidents that could cause extremely serious damage such as the falling of the dummy bar 4 or the slab 5 and the resulting leakage of molten metal, the hydraulic power source was Separately from the unit 8, an emergency hydraulic power source unit 12 was provided.
That is, the emergency hydraulic power source unit 12, as schematically shown in FIG. This emergency accumulator 13 is connected to each of the pressing hydraulic cylinders 6 via a flow rate regulating valve 14, a solenoid valve 15 and a check valve 16 in sequence, and a pressure switch 17 provided at the front stage of the mounting cylinder 6 is connected to the emergency accumulator 13.
The solenoid valve 15 is operated by the output signal.
なお、第１図中符号１８は押付用シリンダ６を
制御する電磁弁、１９は押付用シリンダ６用の流
量制御弁、２０は押付用シリンダ６用のパイロツ
ト逆止弁、２１は非常用アキユムレータ１３用の
逆止弁をそれぞれ示す。 In FIG. 1, reference numeral 18 is a solenoid valve for controlling the pressing cylinder 6, 19 is a flow control valve for the pressing cylinder 6, 20 is a pilot check valve for the pressing cylinder 6, and 21 is an emergency accumulator 13. The check valves for each are shown.
しかして上記のように構成した従来の油圧回路
では、停電による油圧ポンプ９の停止や油圧ホー
スの破損などにより、押付用シリンダ６に供給さ
れる圧油の圧力が低下した場合、前記圧力スイツ
チ１７が圧力の低下を検出し、それに伴つて電磁
弁１５が動作するとともに、非常用アキユムレー
タ１３に蓄油した圧油が各押付用シリンダ６に供
給され、その結果ピンチロール３がダミーバー４
あるいは鋳片５に規定以上の圧力で押し付けられ
るので、これらを支持し、その落下を防止するこ
とができる。 However, in the conventional hydraulic circuit configured as described above, when the pressure of the pressure oil supplied to the pressing cylinder 6 decreases due to a stoppage of the hydraulic pump 9 due to a power outage or damage to a hydraulic hose, the pressure switch 17 detects a decrease in pressure, the solenoid valve 15 operates accordingly, and the pressure oil stored in the emergency accumulator 13 is supplied to each pressing cylinder 6, and as a result, the pinch roll 3 moves to the dummy bar 4.
Alternatively, since it is pressed against the slab 5 with a pressure higher than a specified value, it is possible to support the slab and prevent it from falling.
しかしながら前記非常用アキユムレータ１３は
あくまでも非常用であつて、その容量は常設アキ
ユムレータ１０に比べてかなり小さく、従来一般
には例えば停電時に数十分間程度規定圧力以上の
圧油を押付用シリンダ６に供給し得るだけであ
り、そのため油圧の異常低下の復旧に手間どつた
場合には、ダミーバー４あるいは鋳片５が落下す
る危険があつた。 However, the emergency accumulator 13 is only for emergency use, and its capacity is considerably smaller than that of the permanent accumulator 10. Conventionally, for example, in the event of a power outage, pressurized oil at a pressure higher than the specified pressure is supplied to the pressing cylinder 6 for several tens of minutes. Therefore, there was a risk that the dummy bar 4 or the slab 5 would fall if it took time to recover from the abnormal drop in oil pressure.
このような危険を解消するために、非常用アキ
ユムレータ１３の容量を大きくすることが考えら
れるが、油圧の異常低下を復旧させるに十分な時
間油圧圧力を保償し得る容量とすれば、アキユム
レータ１３が相当大型し、その結果設置スペース
を広くとり、また設備費が嵩むなどの問題が生じ
る。 In order to eliminate this kind of danger, it is conceivable to increase the capacity of the emergency accumulator 13, but if the capacity is such that it can guarantee hydraulic pressure for a sufficient period of time to recover from an abnormal drop in hydraulic pressure, the capacity of the emergency accumulator 13 can be increased. is quite large, which results in problems such as requiring a large installation space and increasing equipment costs.
従来では上述したように、ダミーバー４および
鋳片５の落下を確実に防止することに関し種々の
問題があり、特にダミーバー４を鋳型１の上側か
ら挿入する所謂トツプチヤージ方式では、ダミー
バー４がダミーバーカー（図示せず）から離れる
とピンチロール３以外にこれを支持する手段がな
いので、ピンチロール３による落下防止が絶対の
条件であり、そのため停電等による圧力低下の復
旧時間を長くとることのできる手段が強く望まれ
ていた。 Conventionally, as mentioned above, there are various problems in reliably preventing the dummy bar 4 and the slab 5 from falling. In particular, in the so-called top charge method in which the dummy bar 4 is inserted from above the mold 1, the dummy bar 4 is attached to the dummy bar bar ( (not shown), there is no means to support it other than the pinch rolls 3, so it is absolutely necessary to prevent it from falling by the pinch rolls 3. Therefore, it is a means that can take a long time to restore pressure from a drop in pressure due to a power outage, etc. was strongly desired.
この発明は上記の事情に鑑みてなされたもの
で、ピンチロールをダミーバーあるいは鋳片に押
付るための押付用シリンダに対する圧油を、停電
等圧力異常低下時に長時間に亘つて規定圧力以上
に保持することができ、しかも設備の簡略化を図
ることのできる油圧回路を提供することを目的と
するものである。 This invention was made in view of the above-mentioned circumstances, and it maintains the pressure oil for the pressing cylinder for pressing the pinch roll against the dummy bar or slab at a pressure higher than the specified pressure for a long period of time during abnormal pressure drops such as power outages. It is an object of the present invention to provide a hydraulic circuit that can perform the following steps and simplify the equipment.
以下この発明の実施例を第２図を参照して説明
する。なお第２図に示す実施例において第１図と
同一の部材には第１図に付した符号と同一の符号
を付してその説明を省略する。第２図において、
押付用シリンダ６を制御するための電磁弁１８
は、油圧源ユニツト８に接続された油圧配管２２
から初の分岐として接続され、それ以後の油圧ア
クチエータ群７も油圧配管２２から分岐して接続
されており、さらにその油圧配管２２のうち供給
側配管２２ａには、油圧アクチエータ群７への圧
油の供給を阻止するための電磁遮断弁２３が介装
されている。前記電磁弁１８には、押付用シリン
ダ６が流量調整弁１９を介して接続されており、
電磁弁１８を動作させることにより押付用シリン
ダ６によつてピンチロール３をダミーバー４もし
くは鋳片５に押付け、あるいは引き離すようにな
つている。流量調整弁１９と押付用シリンダ６と
の間には、圧力スイツチ１７が設けられ、この圧
力スイツチ１７は制御器２４に電気的に接続され
ており、さらにその制御器２４に前記電磁遮断弁
２３が電気的に接続されている。前記制御器２４
は、押付用シリンダ６への供給圧が規定圧力以下
になつたときに圧力スイツチ１７が出力する信号
S1、油圧ポンプ用電源の停電信号S2および制御系
電源の停電信号S3のいずれかが入力されたときに
遮断信号S0を前記電磁遮断弁２３に出力するよう
構成されており、したがつて制御器２４が遮断信
号S0を出力した場合、すなわち押付用シリンダ６
への供給圧が低下し、ピンチロール３をダミーバ
ー４あるいは鋳片５を支持する力が低下する事態
が生じた場合、前記電磁遮断弁２３により油圧ア
クチエータ群７への油圧源ユニツト８からの圧油
の供給を阻止するようになつている。 An embodiment of the present invention will be described below with reference to FIG. In the embodiment shown in FIG. 2, the same members as those in FIG. 1 are designated by the same reference numerals as in FIG. 1, and their explanations will be omitted. In Figure 2,
Solenoid valve 18 for controlling the pressing cylinder 6
is the hydraulic piping 22 connected to the hydraulic power source unit 8.
The hydraulic actuator group 7 after that is also branched from the hydraulic piping 22 and connected, and furthermore, the supply side piping 22a of the hydraulic piping 22 has pressure oil to the hydraulic actuator group 7. An electromagnetic cutoff valve 23 is interposed to prevent the supply of. A pressing cylinder 6 is connected to the electromagnetic valve 18 via a flow rate adjustment valve 19,
By operating the electromagnetic valve 18, the pinch roll 3 is pressed against or separated from the dummy bar 4 or the slab 5 by the pressing cylinder 6. A pressure switch 17 is provided between the flow rate adjustment valve 19 and the pressing cylinder 6, and this pressure switch 17 is electrically connected to a controller 24, and the electromagnetic cutoff valve 23 is connected to the controller 24. are electrically connected. The controller 24
is the signal output by the pressure switch 17 when the supply pressure to the pressing cylinder 6 falls below the specified pressure.
S 1 , a power failure signal S 2 for the hydraulic pump power supply, and a power failure signal S 3 for the control system power supply are configured to output a cutoff signal S 0 to the electromagnetic cutoff valve 23, and When the controller 24 outputs the cutoff signal S0 , that is, the pressing cylinder 6
If the supply pressure to the hydraulic actuator group 7 decreases and the force supporting the pinch roll 3 to the dummy bar 4 or the slab 5 decreases, the electromagnetic cutoff valve 23 reduces the pressure from the hydraulic source unit 8 to the hydraulic actuator group 7. It is designed to block the oil supply.
したがつて上記のように構成した油圧回路にあ
つては、例えば油圧アクチエータ群７側の配管２
２の一部が破損して油洩れが生じたり、あるいは
油圧アクチエータ群７側に設けた制御弁（図示せ
ず）に油洩れが生じたりした場合、押付用シリン
ダ６に対する圧油の供給圧が低下するので、圧力
スイツチ１７がその圧力低下を直ちに検出すると
ともに信号S1を制御器２４に対して出力し、その
結果制御器２４が出力する遮断信号S0により電磁
遮断弁２３が切替つて油圧アクチエータ群７に対
する圧油の供給が停止される。これと同時に常設
アキユムレータ１０に蓄油した圧油が圧力低下を
補うべく流出し、その圧油は前記電磁遮断弁２３
が閉じているために押付用シリンダ６に供給され
る。 Therefore, in the hydraulic circuit configured as described above, for example, the piping 2 on the side of the hydraulic actuator group 7
2 is damaged and oil leaks, or if oil leaks from the control valve (not shown) provided on the hydraulic actuator group 7 side, the supply pressure of pressure oil to the pressing cylinder 6 will be reduced. As the pressure decreases, the pressure switch 17 immediately detects the pressure drop and outputs a signal S1 to the controller 24, and as a result, the electromagnetic cutoff valve 23 is switched by the cutoff signal S0 outputted by the controller 24, and the hydraulic pressure is reduced. The supply of pressure oil to the actuator group 7 is stopped. At the same time, the pressure oil stored in the permanent accumulator 10 flows out to compensate for the pressure drop, and the pressure oil is transferred to the electromagnetic cutoff valve 23.
is supplied to the pressing cylinder 6 because it is closed.
また上記の油圧回路では、油圧ポンプ用電源も
しくは制御系電源が停電した場合であつても押付
用シリンダ６に対する圧油の供給圧を前述した場
合と同様に規定圧力以上に保持することができ
る。すなわちいずれかの電源が停電すれば、前記
停電信号S1，S2のうち一方が制御器２４に入力さ
れるから、それに伴つて制御器２４が出力する遮
断信号S0によつて電磁遮断弁２３が閉動作し、そ
の結果常設アキユムレータ１０内の圧油が押付用
シリンダ６に供給される。 Further, in the above-mentioned hydraulic circuit, even if the power supply for the hydraulic pump or the control system power supply fails, the supply pressure of pressure oil to the pressing cylinder 6 can be maintained at a specified pressure or higher as in the case described above. That is, if one of the power supplies fails, one of the power outage signals S 1 and S 2 is input to the controller 24, and accordingly, the electromagnetic cutoff valve is activated by the cutoff signal S 0 output from the controller 24. 23 is closed, and as a result, the pressure oil in the permanent accumulator 10 is supplied to the pressing cylinder 6.
しかして上記の油圧回路では、油洩れや停電等
油圧圧力の低下を招来する事態が生じた場合、常
設アキユムレータ１０に蓄油した圧油を押付用シ
リンダ６に供給することになるが、常設アキユム
レータ１０は連続鋳造機に設備された総ての油圧
アクチエータに対しサージ圧の吸収やエネルギー
補助等を行なうためのものであつて、その容量が
相当大きく、しかも油圧アクチエータ群７を前記
電磁遮断弁２３によつて油圧源ユニツト８に対し
て遮断したために、圧油が漏洩する箇所がそれだ
け少なくなり、したがつて上記の油圧回路では長
時間（数時間）に亘つて押付用シリンダ６に対す
る圧油の供給圧を規定圧力以上に保つことができ
る。なお、上記の油圧回路では、停電等油圧圧力
の低下を招来する事態が生じた場合には、押付用
シリンダ６以外の油圧アクチエータ群７に対する
圧油の供給が停止するが、ダミーバー４をピンチ
ロール３で支持している状態では、トーチカツタ
（図示せず）等後段の機器は未だ稼動していない
から、鋳型１に対する注湯を停止する程度の処置
を講ずれば、特に重大な事故を惹き起こすことは
なく、また鋳片５をピンチロール３で支持してい
る通常の操業状態では、前記電磁遮断弁２３が動
作すると同時に、鋳型１に対する注湯の停止、ト
ーチカツタによる鋳片５の切断の停止等の処置を
講ずれば、特に重大な事故を招来することはな
い。 However, in the above-mentioned hydraulic circuit, when a situation that causes a drop in hydraulic pressure such as an oil leak or a power outage occurs, the pressure oil stored in the permanent accumulator 10 is supplied to the pressing cylinder 6. Reference numeral 10 is for absorbing surge pressure and providing energy support to all the hydraulic actuators installed in the continuous casting machine, and its capacity is quite large. Since the hydraulic power source unit 8 is shut off by the hydraulic circuit, the number of places where pressure oil leaks is reduced accordingly, and therefore, in the above hydraulic circuit, pressure oil is not supplied to the pressing cylinder 6 for a long period of time (several hours). The supply pressure can be maintained above the specified pressure. Note that in the above hydraulic circuit, if a situation that causes a drop in hydraulic pressure such as a power outage occurs, the supply of pressure oil to the hydraulic actuator group 7 other than the pressing cylinder 6 is stopped, but the dummy bar 4 is 3, the equipment at the later stages such as the torch cutter (not shown) is not yet in operation, so if measures such as stopping the pouring of metal into the mold 1 are taken, it may cause a particularly serious accident. In addition, under normal operating conditions in which the slab 5 is supported by the pinch rolls 3, at the same time as the electromagnetic cutoff valve 23 operates, pouring into the mold 1 is stopped and cutting of the slab 5 by the torch cutter is stopped. If these measures are taken, no particularly serious accidents will occur.
第３図Ａ，Ｂは本発明者等が行なつた実験の結
果を示すグラフであつて、非常用アキユムレータ
を用いた従来の油圧回路では、そのアキユムレー
タの容量が小さいために第３図Ａに示すように短
時間（26分）のうちに押付用シリンダ６に対する
圧油の圧力が規定圧力まで降下してしまうが、こ
の発明に係る油圧回路では第３図Ｂに示すよう
に、常設アキユムレータ１０の容量が大きいため
に、長時間（94.7分）に亘つて圧力を規定圧力以
上に保つことができた。 Figures 3A and 3B are graphs showing the results of experiments conducted by the present inventors. In a conventional hydraulic circuit using an emergency accumulator, the capacity of the accumulator is small, so As shown in FIG. 3B, the pressure of the pressure oil in the pressing cylinder 6 drops to the specified pressure within a short period of time (26 minutes), but in the hydraulic circuit according to the present invention, as shown in FIG. Because of its large capacity, the pressure could be maintained above the specified pressure for a long period of time (94.7 minutes).
この実験結果からも明らかなようにこの発明に
係る油圧回路では、停電等油圧圧力の異常低下が
生じた場合であつても、ダミーバー４あるいは鋳
片５を長時間に亘つて確実に支持することができ
る。 As is clear from the results of this experiment, the hydraulic circuit according to the present invention can reliably support the dummy bar 4 or the slab 5 for a long period of time even in the event of an abnormal drop in hydraulic pressure such as a power outage. I can do it.
なお、上記の実施例では、油圧配管２２を主配
管とし、ここから押付用油圧シリンダ６および他
の油圧アクチエータ群７を分岐させるように構成
したが、油圧源ユニツト８には前記の油圧配管２
２以外の配管を直接接続する場合があるが、その
ような場合には、その配管にも遮断弁を介装し、
停電等の非常時には、上記の実施例で示した電磁
弁１８と併せてその遮断弁を閉じることにより、
押付用油圧シリンダ６のみに油圧源ユニツト８す
なわちアキユムレータ１０から圧油を供給するよ
うにすればよい。 In the above embodiment, the hydraulic piping 22 is the main piping, and the pressing hydraulic cylinder 6 and other hydraulic actuator group 7 are branched from there.
There are cases where piping other than 2 is directly connected, but in such cases, the piping must also be equipped with a shutoff valve.
In the event of an emergency such as a power outage, by closing the solenoid valve 18 and the shutoff valve shown in the above embodiment,
Pressure oil may be supplied only to the pressing hydraulic cylinder 6 from the hydraulic power source unit 8, that is, the accumulator 10.
以上の説明で明らかなようにこの発明の油圧回
路によれば、停電や圧油の漏洩等油圧圧力の異常
低下時に、油圧源ユニツト内にサージ圧の吸収や
エネルギの補助のために通常設備されているアキ
ユムレータを遮断弁によつて押付用シリンダ以外
の油圧アクチエータから切り離すとともに、前記
アキユムレータに蓄油した圧油を押付用シリンダ
にのみ供給し、もつてダミーバーあるいは鋳片を
ピンチロールによつて支持するよう構成したか
ら、前記アキユムレータの容量が相当大きいうえ
に、圧油の漏洩箇所が少なくなるために、非常用
アキユムレータを設備した従来の油圧回路とは異
なり、押付用シリンダに対する圧油の供給圧の低
下が少なく、したがつて長時間に亘つてダミーバ
ーあるいは鋳片を落下させることなく支持するこ
とができ、ひいては重大事故を確実かつ未然に防
止することができる。またこの発明では通常設備
されているアキユムレータを使用するのであるか
ら、設備や設置スペースが増大することがないば
かりか、従来設けていた非常用油圧源ユニツトを
省くことができるので、設備の簡略化と併せて設
備費の低減を図ることができ、さらには設備スペ
ースを少なくすることができる。 As is clear from the above description, according to the hydraulic circuit of the present invention, when there is an abnormal drop in hydraulic pressure such as a power outage or a leakage of pressure oil, the hydraulic circuit is normally installed in the hydraulic power source unit to absorb surge pressure and supplement energy. The accumulator is separated from the hydraulic actuators other than the pressing cylinder by a shutoff valve, and the pressure oil stored in the accumulator is supplied only to the pressing cylinder, and the dummy bar or slab is supported by pinch rolls. Since the capacity of the accumulator is considerably large and the number of leakage points for pressure oil is reduced, unlike a conventional hydraulic circuit equipped with an emergency accumulator, the supply pressure of pressure oil to the pressing cylinder is reduced. Therefore, the dummy bar or slab can be supported for a long time without falling, and serious accidents can be reliably prevented. Furthermore, since this invention uses a normally installed accumulator, not only does the equipment and installation space not increase, but the conventionally provided emergency hydraulic power source unit can be omitted, simplifying the equipment. In addition, equipment costs can be reduced, and equipment space can also be reduced.
第１図は連続鋳造機における従来の油圧回路を
示す略解図、第２図はこの発明の一実施例を示す
略解図、第３図Ａ，Ｂは本発明者等が行なつた実
験結果を示すものであつて、Ａは非常用アキユム
レータを用いた従来の油圧回路における押付用シ
リンダに対する圧油の圧力低下を示すグラフ、Ｂ
はこの発明に係る油圧回路における押付用シリン
ダに対する圧油の圧力低下を示すグラフである。
１……鋳型、３……ピンチロール、４……ダミ
ーバー、５……鋳片、６……押付用シリンダ、７
……油圧アクチエータ群、８……油圧源ユニツ
ト、９……油圧ポンプ、１０……アキユムレー
タ、２３……電磁遮断弁、２４……制御器。
Fig. 1 is a schematic diagram showing a conventional hydraulic circuit in a continuous casting machine, Fig. 2 is a schematic diagram showing an embodiment of the present invention, and Figs. 3 A and B show experimental results conducted by the present inventors. A is a graph showing the pressure drop of pressure oil with respect to a pressing cylinder in a conventional hydraulic circuit using an emergency accumulator;
is a graph showing the pressure drop of pressure oil with respect to the pressing cylinder in the hydraulic circuit according to the present invention. 1... Mold, 3... Pinch roll, 4... Dummy bar, 5... Slab, 6... Pressing cylinder, 7
... Hydraulic actuator group, 8 ... Hydraulic source unit, 9 ... Hydraulic pump, 10 ... Accumulator, 23 ... Electromagnetic cutoff valve, 24 ... Controller.
Claims (1)
ーにピンチロールを押付けるための押付用油圧シ
リンダと他の油圧アクチエータ群とを、油圧ポン
プおよび圧力保償用アキユムレータを含む油圧源
ユニツトに接続した連続鋳造機において、前記油
圧源ユニツトと前記他の油圧アクチエータ群との
間に遮断弁を設け、前記押付用油圧シリンダに供
給される油圧の圧力低下信号、および前記油圧ポ
ンプの電源および制御系電源の停電信号のいずれ
かの信号が入力されたときに前記遮断弁に遮断信
号を出力する制御器を設けた構成であることを特
徴とする連続鋳造機における鋳片およびダミーバ
ー落下防止用油圧回路。1 In a continuous casting machine in which a pressing hydraulic cylinder for pressing a pinch roll against a slab or dummy bar to be pulled out of a mold and a group of other hydraulic actuators are connected to a hydraulic power source unit including a hydraulic pump and a pressure guarantee accumulator. , a cutoff valve is provided between the hydraulic power source unit and the other hydraulic actuator group, and a pressure drop signal of the hydraulic pressure supplied to the pressing hydraulic cylinder and a power outage signal of the power source of the hydraulic pump and the control system power source are controlled. 1. A hydraulic circuit for preventing falling of slabs and dummy bars in a continuous casting machine, comprising a controller that outputs a cutoff signal to the cutoff valve when any one of the signals is input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1854782A JPS58135753A (en) | 1982-02-08 | 1982-02-08 | Hydraulic circuit for preventing dropping of ingot and dummy bar in continuous casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1854782A JPS58135753A (en) | 1982-02-08 | 1982-02-08 | Hydraulic circuit for preventing dropping of ingot and dummy bar in continuous casting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58135753A JPS58135753A (en) | 1983-08-12 |
| JPS6128425B2 true JPS6128425B2 (en) | 1986-06-30 |
Family
ID=11974650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1854782A Granted JPS58135753A (en) | 1982-02-08 | 1982-02-08 | Hydraulic circuit for preventing dropping of ingot and dummy bar in continuous casting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58135753A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6061503U (en) * | 1983-10-04 | 1985-04-30 | 三菱重工業株式会社 | Hydraulic system for lifting equipment |
| CN110541860B (en) * | 2019-09-24 | 2023-06-23 | 中国重型机械研究院股份公司 | Crystallizer on-line thermal width adjustment hydraulic control system and method |
| AT525046B1 (en) * | 2021-06-22 | 2022-12-15 | Primetals Technologies Austria GmbH | Compact, energy-saving and highly dynamic hydraulic drive for oscillating a mold of a continuous casting machine |
| CN113251029B (en) * | 2021-06-25 | 2024-05-24 | 成都利君实业股份有限公司 | Hydraulic control system and method for adjusting roller press |
-
1982
- 1982-02-08 JP JP1854782A patent/JPS58135753A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58135753A (en) | 1983-08-12 |
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