JP2015229531A - Pneumatic unloader - Google Patents
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Abstract
Description
本発明は、大豆等のバラ物を搬送するニューマチックアンローダに関するものである。 The present invention relates to a pneumatic unloader that conveys roses such as soybeans.
ニューマチックアンローダは、吸引ポンプを用いて空気の吸込力（負圧：約４０ｋＰａ前後）で穀物などのバラ物を荷役するものであり、バラ物を吸引するための吸引ノズル及び管路を有する。吸引ノズルは、船倉内のバラ物に適宜の深さ挿入されることで空気と共にバラ物を吸い込むようになっている。 The pneumatic unloader uses a suction pump to load loose items such as grains with air suction force (negative pressure: about 40 kPa), and has a suction nozzle and a conduit for sucking the rose items. The suction nozzle is configured to suck the rose together with the air by being inserted into the rose in the hold at an appropriate depth.
ところで、バラ物を吸引力で搬送する際、十分な搬送効率を得るためには空気に対するバラ物の混合比が重要となる。このため、バラ物に対する吸引ノズルの挿入深さを調整したり、予め吸引ノズルに設けられた空気導入弁等を調整する必要がある。 By the way, when a loose article is conveyed by a suction force, the mixing ratio of the loose article to the air is important in order to obtain sufficient conveyance efficiency. For this reason, it is necessary to adjust the insertion depth of the suction nozzle with respect to the loose article, or to adjust an air introduction valve or the like previously provided in the suction nozzle.
また、バラ物には、メイズ、大豆、小麦、マイロ、大麦、大豆ミール、菜種等の種々の見掛け比重の違うものがあり、これらを搬送する最適な混合比は相違するため、最適なノズル挿入深さはバラ物の種類等によって異なり、一定でない。またさらに、荷役作業が進むと吸引ノズル周辺のバラ物が吸い込まれてノズル挿入深さが変わるため、常に吸引ノズルをバラ物の種類に応じた最適な深さに保つことは容易でない。 In addition, there are various roses with different apparent specific gravity such as maize, soybean, wheat, mylo, barley, soybean meal, rapeseed, etc. The depth varies depending on the type of roses and is not constant. Furthermore, since the loose object around the suction nozzle is sucked and the nozzle insertion depth changes as the cargo handling operation proceeds, it is not easy to always keep the suction nozzle at the optimum depth according to the type of the loose object.
このため、バラ物が過度に吸い込まれる可能性もあり、かかる場合には、吸引ノズルが閉塞され搬送路の負圧が吸引ポンプの能力まで高まり、管路、吸引ポンプなどの機械が破損する恐れがある。このような事態に備え、ニューマチックアンローダには機械を保護するための開放弁が具備されている。 For this reason, there is a possibility that loose objects may be sucked in excessively. In such a case, the suction nozzle is blocked, the negative pressure of the conveyance path increases to the capacity of the suction pump, and the machine such as the pipe line and the suction pump may be damaged There is. In preparation for such a situation, the pneumatic unloader is provided with an open valve for protecting the machine.
開放弁は、予め設定した設定値を超える負圧となったとき瞬時に開いて圧力を大気開放するようになっている。かかる安全弁によれば、管路、吸引ポンプなどの機械が破損するのを確実に防ぐことができる。 The release valve is opened instantly to release the pressure to the atmosphere when the negative pressure exceeds a preset value. According to such a safety valve, it is possible to reliably prevent damage to machines such as a pipe line and a suction pump.
しかしながら、開放弁を全開してバラ物の搬送を止めてしまうため、荷役が中断され、荷役効率が低下するという課題があった。特にニューマチックアンローダは、連続アンローダ等の他のアンローダよりも荷役効率が高く、この点がセールスポイントでもある。このため、可能な限り荷役を中断せずに荷役効率を上げたいという事情がある。 However, since the release valve is fully opened to stop the conveyance of the bulk material, there is a problem that the cargo handling is interrupted and the cargo handling efficiency is lowered. In particular, the pneumatic unloader has a higher handling efficiency than other unloaders such as a continuous unloader, and this is also a selling point. For this reason, there is a situation where it is desired to increase the cargo handling efficiency without interrupting the cargo handling as much as possible.
本発明の目的は、荷役の中断を低減でき、荷役効率を向上できるニューマチックアンローダを提供することにある。 The objective of this invention is providing the pneumatic unloader which can reduce the interruption of cargo handling and can improve cargo handling efficiency.
上述の目的を達成するため、本発明は、バラ物を吸引する吸引ノズルを有する垂直管と、該垂直管で搬送されたバラ物を吸引流から分離するレシーバタンクと、該レシーバタンク内を負圧に保持する吸引ポンプと、前記レシーバタンクと前記吸引ポンプ間の吸引管に接続され設定値を越える負圧になったとき大気に開放する開放弁とを備えたニューマチックアンローダにおいて、前記吸引管に設けられ吸引圧を計測する負圧計測器と、前記吸引管に設けられ該吸引管内の負圧を調整する調整弁と、前記負圧計測器が計測する吸引圧が通常運転域を超えて前記設定値に近づいたとき、前記吸引圧が前記設定値を超えないように前記調整弁を開度調節する制御装置とを備えたものである。 In order to achieve the above-described object, the present invention provides a vertical pipe having a suction nozzle for sucking a loose article, a receiver tank for separating the rose article conveyed by the vertical pipe from a suction flow, and a negative pressure inside the receiver tank. A pneumatic unloader comprising: a suction pump that maintains a pressure; and a release valve that is connected to a suction pipe between the receiver tank and the suction pump and opens to the atmosphere when a negative pressure exceeding a set value is reached. A negative pressure measuring instrument for measuring the suction pressure, an adjustment valve for adjusting the negative pressure in the suction pipe, and a suction pressure measured by the negative pressure measuring instrument exceeding a normal operating range. And a control device that adjusts the opening of the adjustment valve so that the suction pressure does not exceed the set value when the set value approaches.
本発明のニューマチックアンローダによれば、荷役の中断を低減でき、荷役効率を向上できる。 According to the pneumatic unloader of the present invention, the interruption of cargo handling can be reduced and the cargo handling efficiency can be improved.
以下、本発明の好適な実施の形態を添付図面にしたがって説明する。 Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
図１に示すように、ニューマチックアンローダ１は、船倉２内のバラ物３に対して垂直に延び下端にバラ物３を吸引するための吸引ノズル４を有する垂直管５と、垂直管５で搬送されたバラ物３を吸引流から分離するレシーバタンク６と、レシーバタンク６内を負圧に保持する吸引ポンプ７と、吸引ポンプ７とレシーバタンク６を接続する吸引管８と、吸引圧を計測する負圧計測器９と、吸引圧が設定値を越える負圧になったとき大気開放するための開放弁１０と、負圧を調整する調整弁１１と、調整弁１１を開度調節するための制御装置１２とを備える。 As shown in FIG. 1, a pneumatic unloader 1 includes a vertical pipe 5 that extends perpendicularly to a loose article 3 in a hold 2 and has a suction nozzle 4 for sucking the loose article 3 at a lower end, and a vertical pipe 5. The receiver tank 6 that separates the conveyed bulk material 3 from the suction flow, the suction pump 7 that holds the receiver tank 6 at a negative pressure, the suction pipe 8 that connects the suction pump 7 and the receiver tank 6, and the suction pressure A negative pressure measuring device 9 for measuring, an opening valve 10 for releasing the atmosphere when the suction pressure becomes a negative pressure exceeding a set value, an adjusting valve 11 for adjusting the negative pressure, and an opening adjustment of the adjusting valve 11 And a control device 12 for the purpose.
垂直管５は、伸縮自在に形成されており、水平管１３を介してレシーバタンク６に接続される。水平管１３は、一端がスイングジョイント１５を介して垂直管５の上端と回動自在に接続され、他端がレシーバタンク６の上下方向の中央にボールジョイント１４を介して俯仰自在に接続されている。また、水平管１３は、俯仰自在なブームＢに沿って延びると共にブームＢを介してワイヤ２４に支持されている。ワイヤ２４は、ブームＢの先端側に接続されており、ブームＢを俯仰自在に吊り上げるようになっている。また、ワイヤ２４は、後述するレシーバタンク６のマスト部６ｂの頂部を経て起伏装置２５に巻き掛けられており、起伏装置２５によって巻き出し長さが調節されるようになっている。起伏装置２５はオペレータが操作できるように形成されており、起伏装置２５の操作を通じて水平管１３の俯仰角度が調節される。 The vertical pipe 5 is formed to be extendable and contracted, and is connected to the receiver tank 6 through the horizontal pipe 13. One end of the horizontal pipe 13 is pivotally connected to the upper end of the vertical pipe 5 via the swing joint 15, and the other end is connected to the center of the receiver tank 6 in the vertical direction via the ball joint 14 so as to be raised and lowered. Yes. The horizontal pipe 13 extends along a boom B that can be raised and lowered and is supported by the wire 24 via the boom B. The wire 24 is connected to the tip end side of the boom B, and the boom B is lifted up and down freely. Further, the wire 24 is wound around the hoisting device 25 through the top of the mast portion 6b of the receiver tank 6 described later, and the unwinding length is adjusted by the hoisting device 25. The hoisting device 25 is formed so as to be operated by an operator, and the elevation angle of the horizontal pipe 13 is adjusted through the operation of the hoisting device 25.
また、水平管１３は、伸縮自在に形成されており、長さと俯仰角度とが調節されることで船倉２内の任意の位置に吸引ノズル４を移動できるようになっている。 Further, the horizontal pipe 13 is formed to be extendable and retractable, and the suction nozzle 4 can be moved to an arbitrary position in the hold 2 by adjusting the length and the elevation angle.
レシーバタンク６は、上下に延びる容器状に形成され重力で吸引流からバラ物３を分離するためのタンク本体６ａと、タンク本体６ａに設けられタンク本体６ａよりも上方に延びるマスト部６ｂとを備える。タンク本体６ａの上部には、バグフィルタ１６が設けられており、タンク本体６ａの下端にはロータリフィーダ１７が設けられている。ロータリフィーダ１７は、タンク本体６ａ内の負圧を維持しつつバラ物３を機内コンベア１８に払い出す。機内コンベア１８は、チェーン（図示せず）などによりバラ物３を地上コンベア１９に払い出すようになっている。マスト部６ｂは、頂部にシーブ２６が回転自在に設けられると共に、側部に起伏装置２５が設けられており、起伏装置２５と水平管１３との間でワイヤ２４を案内するようになっている。 The receiver tank 6 is formed in a container shape extending vertically, and includes a tank body 6a for separating the rose 3 from the suction flow by gravity, and a mast portion 6b provided on the tank body 6a and extending above the tank body 6a. Prepare. A bag filter 16 is provided at the upper part of the tank body 6a, and a rotary feeder 17 is provided at the lower end of the tank body 6a. The rotary feeder 17 delivers the loose article 3 to the in-machine conveyor 18 while maintaining the negative pressure in the tank body 6a. The in-machine conveyor 18 pays out the loose articles 3 to the ground conveyor 19 by a chain (not shown). The mast portion 6 b is provided with a sheave 26 at the top so as to be rotatable, and a undulation device 25 is provided at a side portion thereof, and guides the wire 24 between the undulation device 25 and the horizontal tube 13. .
吸引ポンプ７は、ルーツ式真空ポンプ等の真空ポンプからなり、常に一定の動力で駆動される。 The suction pump 7 is a vacuum pump such as a roots-type vacuum pump, and is always driven with a constant power.
吸引管８は、一端がレシーバタンク６の頂部に接続されており、他端が吸引ポンプ７の吸込口に接続されている。また、吸引管８には、開放弁１０及び調整弁１１が接続されると共に、負圧計測器９が設けられている。開放弁１０は、垂直管５、水平管１３等にバラ物３が完全に詰まったときに機械を保護する安全弁として機能するものであり、制御装置１２からの電気信号で全閉、全開のいずれかに動作する。 One end of the suction pipe 8 is connected to the top of the receiver tank 6, and the other end is connected to the suction port of the suction pump 7. The suction pipe 8 is connected to an open valve 10 and a regulating valve 11 and is provided with a negative pressure measuring device 9. The release valve 10 functions as a safety valve that protects the machine when the rose 3 is completely clogged in the vertical pipe 5, the horizontal pipe 13, etc., and is either fully closed or fully opened by an electrical signal from the control device 12. It works.
調整弁１１は、バラ物３が詰まり気味になったときに外気を必要最低限導入して過度な圧力低下を防ぐものであり、バタフライ弁等の開度がリニアに調整可能なものからなる。調整弁１１は、制御装置１２からの電気信号に応じて開度調整される。また、調整弁１１は、最大流量が開放弁１０より小さく設定されており、吸引管８に導入する大気の流量をきめ細かに制御できるようになっている。 The regulating valve 11 is designed to prevent the excessive pressure drop by introducing a minimum amount of outside air when the loose article 3 becomes clogged, and is configured such that the opening degree of the butterfly valve or the like can be linearly adjusted. The opening of the regulating valve 11 is adjusted according to an electrical signal from the control device 12. Further, the regulating valve 11 is set to have a maximum flow rate smaller than that of the open valve 10, and can finely control the flow rate of the air introduced into the suction pipe 8.
制御装置１２は、負圧計測器９、開放弁１０及び調整弁１１と信号線２０を介して接続されている。制御装置１２は、開放弁１０を制御する開放制御部２１と、調整弁１１を制御する調整制御部２２とを備える。 The control device 12 is connected to the negative pressure measuring instrument 9, the release valve 10 and the regulating valve 11 through a signal line 20. The control device 12 includes an opening control unit 21 that controls the opening valve 10 and an adjustment control unit 22 that controls the adjusting valve 11.
開放制御部２１は、負圧計測器９から取得する負圧（計測値）が予め設定された設定値を越える負圧になったとき吸引管８を全開にする。この設定値は、垂直管５、水平管１３等の配管系やバグフィルタ１６等の機械が壊れない程度の負圧に設定されると共に若干の余裕をもって設定されている。 The opening control unit 21 fully opens the suction pipe 8 when the negative pressure (measured value) acquired from the negative pressure measuring device 9 becomes a negative pressure exceeding a preset set value. This set value is set to a negative pressure that does not break the piping system such as the vertical pipe 5 and the horizontal pipe 13 and the machine such as the bag filter 16 and is set with a slight margin.
調整制御部２２は、負圧計測器９から取得する負圧が通常運転域を超えて設定値に近づいたとき、吸引圧が設定値を超えないように調整弁１１を開度調節する。具体的には、調整制御部２２には、通常運転域の圧力よりも低く、かつ、開放制御部２１の設定値より高い圧力値（安全側の圧力値）が調整開始値として設定されている。調整制御部２２は、負圧計測器９からの測定値が調整開始値を超えて下がったとき負圧計測器９の計測値が調整目標値に維持されるように調整弁１１の開度を調整する。ここで調整目標値とは、開放制御部２１に設定された設定値より高く、かつ、調整開始値より低い値である。 The adjustment control unit 22 adjusts the opening of the adjustment valve 11 so that the suction pressure does not exceed the set value when the negative pressure acquired from the negative pressure measuring instrument 9 exceeds the normal operation range and approaches the set value. Specifically, in the adjustment control unit 22, a pressure value (safety side pressure value) lower than the pressure in the normal operation region and higher than the set value of the opening control unit 21 is set as the adjustment start value. . The adjustment control unit 22 adjusts the opening of the adjustment valve 11 so that the measured value of the negative pressure measuring instrument 9 is maintained at the adjustment target value when the measured value from the negative pressure measuring instrument 9 falls below the adjustment start value. adjust. Here, the adjustment target value is a value that is higher than the set value set in the opening control unit 21 and lower than the adjustment start value.
なお、調整開始値及び調整目標値は、荷役するバラ物３の性状に応じて複数登録可能としてもよい。上述したようにバラ物３には、見掛比重等の性状が異なる複数の種類があり、種類毎に最適なバラ物３と空気との混合比が異なり、バラ物３が詰まり気味となったときの圧力変化の仕方もバラ物３の種類によって異なる。このため、バラ物３の種類に応じて最適な調整開始値及び調整目標値を予め実験等によって求めておき、調整制御部２２に登録可能としてもよい。また、バラ物３の性状は分からない場合もあるので、調整制御部２２には、バラ物３の性状が分からない場合の最大公約数的な調整開始値及び調整目標値も入力又は登録可能としてもよい。 Note that a plurality of adjustment start values and adjustment target values may be registered in accordance with the properties of the bulk material 3 to be handled. As described above, there are a plurality of types of roses 3 with different properties such as apparent specific gravity, and the optimal mixing ratio between the roses 3 and the air is different for each type, and the roses 3 are clogged. The way in which the pressure changes is also different depending on the type of the rose 3. For this reason, an optimal adjustment start value and an adjustment target value may be obtained in advance by experiments or the like according to the type of the rose article 3 and may be registered in the adjustment control unit 22. In addition, since the properties of the rose 3 may not be known, the adjustment control unit 22 can input or register the adjustment start value and the adjustment target value that are the greatest common divisor when the properties of the rose 3 are not known. Also good.
また、制御装置１２には、吸引ポンプ７のオンオフ操作やバラ物３の種類を入力するための操作部２３が有線又は無線にて接続されている。 In addition, an operation unit 23 for inputting the on / off operation of the suction pump 7 and the type of the rose 3 is connected to the control device 12 by wire or wirelessly.
つぎに本実施の形態の作用を述べる。 Next, the operation of this embodiment will be described.
船倉２内のバラ物３を荷役する場合、吸引ポンプ７を作動させる。 When handling the bulk 3 in the hold 2, the suction pump 7 is operated.
この後、船倉２内のバラ物３に吸引ノズル４を差し込む。吸引ノズル４近傍のバラ物３が吸引ノズル４内に吸引され、垂直管５及び水平管１３を経てレシーバタンク６のタンク本体６ａ内に吸い込まれる。タンク本体６ａに至ったバラ物３は、吸引流から分離されて落下し、ロータリフィーダ１７にて機内コンベア１８に払い出される。また、バラ物３が分離された吸引流は吸引管８を介して吸引ポンプ７に吸い込まれる。 Thereafter, the suction nozzle 4 is inserted into the loose article 3 in the hold 2. The loose object 3 in the vicinity of the suction nozzle 4 is sucked into the suction nozzle 4 and sucked into the tank body 6 a of the receiver tank 6 through the vertical pipe 5 and the horizontal pipe 13. The loose article 3 that has reached the tank body 6 a is separated from the suction flow and falls, and is then delivered to the in-machine conveyor 18 by the rotary feeder 17. In addition, the suction flow from which the rose 3 is separated is sucked into the suction pump 7 through the suction pipe 8.
吸引ノズル４の挿入深さが過度に深くなった場合、空気に対するバラ物３の混合比が高くなって垂直管５又は水平管１３内でバラ物３が詰まり気味となる。その結果、負圧が過度となって調整開始値に至った場合、調整制御部２２は負圧計測器９の測定値が調整目標値に近づくように調整弁１１の開度をフィードバック制御する。制御可能な場合、開放弁１０が作動することはなく、荷役が継続され、荷役の中断を未然に防ぐことができる。 When the insertion depth of the suction nozzle 4 is excessively deep, the mixing ratio of the loose objects 3 to the air becomes high, and the loose objects 3 are clogged in the vertical pipe 5 or the horizontal pipe 13. As a result, when the negative pressure becomes excessive and reaches the adjustment start value, the adjustment control unit 22 feedback-controls the opening degree of the adjustment valve 11 so that the measurement value of the negative pressure measuring instrument 9 approaches the adjustment target value. When controllable, the release valve 10 does not operate, cargo handling is continued, and interruption of cargo handling can be prevented in advance.
また、バラ物３が完全に詰まった場合、調整制御部２２によって調整弁１１が全開されても圧力の低下が収まることはなく、負圧は設定値を超えて下がる。開放制御部２１は、負圧計測器９の計測値が設定値を超える負圧になると、開放弁１０を全開にする。これにより、垂直管５、水平管１３等の管路や、吸引ポンプ７などの機械が破損するのを完全に防ぐことができる。 Further, when the loose article 3 is completely clogged, even if the adjustment control unit 22 is fully opened by the adjustment control unit 22, the pressure drop does not stop, and the negative pressure falls below the set value. When the measured value of the negative pressure measuring device 9 becomes a negative pressure exceeding the set value, the opening control unit 21 opens the opening valve 10 fully. Thereby, it is possible to completely prevent the pipes such as the vertical pipe 5 and the horizontal pipe 13 and the machine such as the suction pump 7 from being damaged.
このように、吸引管８に設けられ吸引圧を計測する負圧計測器９と、吸引管８に設けられ吸引管８内の負圧を調整する調整弁１１と、負圧計測器９が計測する吸引圧が通常運転域を超えて設定値に近づいたとき、吸引圧が設定値を超えないように調整弁１１を開度調節する制御装置１２とを備えるものとしたため、バラ物３の詰まりによる荷役の中断を低減でき、荷役効率を向上できる。 Thus, the negative pressure measuring instrument 9 provided in the suction pipe 8 for measuring the suction pressure, the adjustment valve 11 provided in the suction pipe 8 for adjusting the negative pressure in the suction pipe 8, and the negative pressure measuring instrument 9 measure. Since the control device 12 for adjusting the opening of the adjustment valve 11 is provided so that the suction pressure does not exceed the set value when the suction pressure to be approached the set value exceeds the normal operating range, the loose article 3 is clogged. It is possible to reduce the interruption of cargo handling due to, and improve the cargo handling efficiency.
開放弁１０は、制御装置１２からの電気信号で作動するように形成され、制御装置１２は、負圧計測器９が計測する負圧が設定値を超えて下がったとき開放弁１０を全開するように形成されるものとしたため、調整弁１１の制御と開放弁１０の制御とを共通の負圧計測器９を用いて行うことができ、調整弁１１の制御と開放弁１０の制御とで別々の負圧計測手段を用いる場合と比べて安価にできる。 The release valve 10 is configured to be operated by an electrical signal from the control device 12, and the control device 12 fully opens the release valve 10 when the negative pressure measured by the negative pressure measuring device 9 falls below a set value. Therefore, the control of the regulating valve 11 and the control of the release valve 10 can be performed by using the common negative pressure measuring device 9, and the control of the regulation valve 11 and the control of the release valve 10 can be performed. Compared to the case where separate negative pressure measuring means is used, the cost can be reduced.
なお、制御装置１２は、調整弁１１の開度調節を開始するときの圧力値たる調整開始値がバラ物３の種類に応じて複数登録可能に形成され、調整開始値がバラ物３の種類に応じて選択可能にされた場合、調整弁１１の開弁をバラ物３の種類に応じた最適な値にできる。 The control device 12 is formed such that a plurality of adjustment start values, which are pressure values when starting the adjustment of the opening degree of the adjustment valve 11, can be registered according to the type of the rose 3, and the adjustment start value is the type of the rose 3. If it is made selectable according to, the valve opening of the regulating valve 11 can be set to an optimum value according to the type of the rose 3.
また、調整制御部２２によって調整弁１１が開かれたとき、その旨をオペレータに伝えるディスプレイ、スピーカ等の報知手段が制御装置１２に接続されるものとしてもよい。混合比再調整の必要性をオペレータに確実に伝えることができ、荷役の中断をより確実に低減できる。 In addition, when the adjustment valve 11 is opened by the adjustment control unit 22, notification means such as a display or a speaker that informs the operator may be connected to the control device 12. The necessity of readjustment of the mixing ratio can be reliably communicated to the operator, and the suspension of cargo handling can be more reliably reduced.
１ ニューマチックアンローダ
３ バラ物
４ 吸引ノズル
５ 垂直管
６ レシーバタンク
７ 吸引ポンプ
８ 吸引管
９ 負圧計測器
１０ 開放弁
１１ 調整弁
１２ 制御装置
DESCRIPTION OF SYMBOLS 1 Pneumatic unloader 3 Bulk material 4 Suction nozzle 5 Vertical pipe 6 Receiver tank 7 Suction pump 8 Suction pipe 9 Negative pressure measuring instrument 10 Release valve 11 Adjusting valve 12 Control device
Claims (3)
前記吸引管に設けられ吸引圧を計測する負圧計測器と、前記吸引管に設けられ該吸引管内の負圧を調整する調整弁と、前記負圧計測器が計測する吸引圧が通常運転域を超えて前記設定値に近づいたとき、前記吸引圧が前記設定値を超えないように前記調整弁を開度調節する制御装置とを備えたことを特徴とするニューマチックアンローダ。 A vertical pipe having a suction nozzle for sucking a rose, a receiver tank for separating the rose conveyed by the vertical pipe from a suction flow, a suction pump for holding the inside of the receiver tank at a negative pressure, and the receiver tank; In a pneumatic unloader that is connected to a suction pipe between the suction pumps and has a release valve that opens to the atmosphere when a negative pressure exceeding a set value is reached,
The negative pressure measuring instrument provided in the suction pipe for measuring the suction pressure, the adjustment valve provided in the suction pipe for adjusting the negative pressure in the suction pipe, and the suction pressure measured by the negative pressure measuring instrument are within a normal operating range. And a control device that adjusts the opening of the adjusting valve so that the suction pressure does not exceed the set value when the set pressure is approached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014114871A JP2015229531A (en) | 2014-06-03 | 2014-06-03 | Pneumatic unloader |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014114871A JP2015229531A (en) | 2014-06-03 | 2014-06-03 | Pneumatic unloader |
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| Publication Number | Publication Date |
|---|---|
| JP2015229531A true JP2015229531A (en) | 2015-12-21 |
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| JP2014114871A Pending JP2015229531A (en) | 2014-06-03 | 2014-06-03 | Pneumatic unloader |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105692209A (en) * | 2016-04-08 | 2016-06-22 | 张家港市江南利玛特设备制造有限公司 | Particle conveyor |
| CN107032144A (en) * | 2017-05-04 | 2017-08-11 | 长沙骏豪机械制造有限公司 | Bulk cargo continuous ship discharging machine based on strength Yu mechanical combination conveying technology |
| CN108100675A (en) * | 2017-12-15 | 2018-06-01 | 神华集团有限责任公司 | Ice chest pearlife takes off sand device and method |
| JP7479267B2 (en) | 2020-09-28 | 2024-05-08 | Ｉｈｉ運搬機械株式会社 | Bulk material storage and transportation system |
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|---|---|---|---|---|
| JPS6016407U (en) * | 1984-03-29 | 1985-02-04 | 石川島播磨重工業株式会社 | Pipe unblockage device in pneumatic transportation system |
| JP2012086935A (en) * | 2010-10-19 | 2012-05-10 | Nec Energy Devices Ltd | Pneumatic transportation device for powder |
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2014
- 2014-06-03 JP JP2014114871A patent/JP2015229531A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6016407U (en) * | 1984-03-29 | 1985-02-04 | 石川島播磨重工業株式会社 | Pipe unblockage device in pneumatic transportation system |
| JP2012086935A (en) * | 2010-10-19 | 2012-05-10 | Nec Energy Devices Ltd | Pneumatic transportation device for powder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105692209A (en) * | 2016-04-08 | 2016-06-22 | 张家港市江南利玛特设备制造有限公司 | Particle conveyor |
| CN107032144A (en) * | 2017-05-04 | 2017-08-11 | 长沙骏豪机械制造有限公司 | Bulk cargo continuous ship discharging machine based on strength Yu mechanical combination conveying technology |
| CN108100675A (en) * | 2017-12-15 | 2018-06-01 | 神华集团有限责任公司 | Ice chest pearlife takes off sand device and method |
| JP7479267B2 (en) | 2020-09-28 | 2024-05-08 | Ｉｈｉ運搬機械株式会社 | Bulk material storage and transportation system |
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