JP2020179950A - Apparatus for transferring particulate matter, method for transferring particulate matter, and control program - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000013618 particulate matter Substances 0.000 title abstract 7
- 239000008187 granular material Substances 0.000 claims description 136
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- 238000012546 transfer Methods 0.000 claims description 88
- 238000010191 image analysis Methods 0.000 claims description 7
- 238000001739 density measurement Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 46
- 238000005259 measurement Methods 0.000 description 14
- 238000011084 recovery Methods 0.000 description 7
- 238000007664 blowing Methods 0.000 description 3
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
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- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
本発明は、粉粒体移送装置、粉粒体移送方法、及び制御プログラムに関する。 The present invention relates to a powder or granular material transfer device, a powder or granular material transfer method, and a control program.
特許文献１に開示されているように、空気の流れを利用して粉粒体を移送する粉粒体移送装置が知られている。この粉粒体移送装置は、中空の外管と、外管の内面との間に隙間を確保した状態で外管の内部に挿通されている中空の内管とで構成された２重管を備える。２重管の先端部は、粉粒体と対向する位置に配置される。 As disclosed in Patent Document 1, there is known a powder or granular material transfer device that transfers powder or granular material by utilizing the flow of air. This powder or granular material transfer device is a double pipe composed of a hollow outer pipe and a hollow inner pipe inserted inside the outer pipe with a gap secured between the inner surface of the outer pipe. Be prepared. The tip of the double tube is arranged at a position facing the powder or granular material.
外管と内管との間の隙間によって構成される外部流路に空気が吹込まれ、内管によって構成される内部流路から、空気が吸込まれる。これにより、外部流路に吹込まれた空気が２重管の先端部から粉粒体に当てられ、空気が当てられた粉粒体及びその空気が、２重管の先端部から内部流路に吸込まれる。内部流路に吸込まれた粉粒体は、空気によって移送先まで移送される。 Air is blown into the outer flow path formed by the gap between the outer tube and the inner tube, and air is sucked from the inner flow path formed by the inner tube. As a result, the air blown into the external flow path is applied to the powder or granular material from the tip of the double pipe, and the powder or granular material to which the air is applied and the air thereof are transferred from the tip of the double pipe to the internal flow path. Be sucked in. The powder or granular material sucked into the internal flow path is transferred to the transfer destination by air.
上記粉粒体移送装置においては、内部流路を流れる粉粒体の密度が大きすぎると、内部流路に閉塞又は脈流が生じることがある。一方、内部流路を流れる粉粒体の密度が小さすぎると、閉塞及び脈流は生じにくいが、粉粒体を効率的に移送することができない。 In the above-mentioned powder or granular material transfer device, if the density of the powder or granular material flowing through the internal flow path is too high, the internal flow path may be blocked or pulsating. On the other hand, if the density of the powder or granular material flowing through the internal flow path is too low, blockage and pulsating flow are unlikely to occur, but the powder or granular material cannot be efficiently transferred.
本発明の目的は、粉粒体を効率的に移送することができ、かつ粉粒体を移送する流路に閉塞又は脈流が生じにくい粉粒体移送装置、粉粒体移送方法、及び制御プログラムを提供することである。 An object of the present invention is a powder or granular material transfer device, a powder or granular material transfer method, and control that can efficiently transfer powder or granular material and are less likely to cause blockage or pulsating in the flow path for transferring powder or granular material. To provide a program.
本発明に係る粉粒体移送装置は、
中空の外管と、前記外管の内面との間に隙間を確保した状態で前記外管の内部に挿通されている中空の内管とによって構成された２重管を有し、前記２重管の先端部が、移送の対象である粉粒体と対向する位置に配置されるノズル部材と、
前記内管によって構成される内部流路と、前記外管と前記内管との間の前記隙間によって構成される外部流路との一方の流路に移送ガスを吹込み、かつ他方の流路から前記移送ガスを吸込むガス流形成装置と、
前記他方の流路又は前記他方の流路と連通した箇所において、前記移送ガスと共に流れている前記粉粒体の密度を計測する密度計測装置と、
前記密度計測装置によって計測された前記密度が予め定められた下限値よりも小さい場合に、前記ガス流形成装置によって前記一方の流路に吹込まれる前記移送ガスの流量が減少し、前記密度計測装置によって計測された前記密度が予め定められた上限値よりも大きい場合には、前記ガス流形成装置によって前記一方の流路に吹込まれる前記移送ガスの流量が増大するように、前記ガス流形成装置を制御する制御装置と、
を備える。
The powder or granular material transfer device according to the present invention is
It has a double pipe composed of a hollow outer pipe and a hollow inner pipe inserted into the inside of the outer pipe with a gap secured between the outer pipe and the inner surface of the outer pipe. A nozzle member whose tip is arranged at a position facing the powder or granular material to be transferred,
The transfer gas is blown into one flow path of the inner flow path formed by the inner pipe and the outer flow path formed by the gap between the outer pipe and the inner pipe, and the other flow path. A gas flow forming device that sucks the transfer gas from
A density measuring device for measuring the density of the powder or granular material flowing together with the transferred gas at the other flow path or the location communicating with the other flow path.
When the density measured by the density measuring device is smaller than a predetermined lower limit value, the flow rate of the transferred gas blown into the one flow path by the gas flow forming device is reduced, and the density measurement is performed. When the density measured by the device is larger than a predetermined upper limit value, the gas flow is increased so that the flow rate of the transferred gas blown into the one flow path by the gas flow forming device is increased. A control device that controls the forming device and
To be equipped.
前記密度計測装置が、
前記他方の流路又は前記他方の流路と連通した箇所において、前記移送ガスと共に流れている前記粉粒体を撮影するカメラと、
前記カメラによって撮影されて得られた画像を解析することにより、前記粉粒体の前記密度を求める画像解析部と、
を有していてもよい。
The density measuring device
A camera that photographs the powder or granular material flowing together with the transfer gas at the other flow path or a portion communicating with the other flow path.
An image analysis unit that obtains the density of the powder or granular material by analyzing an image taken by the camera and obtained.
May have.
前記ガス流形成装置が、前記外部流路に前記移送ガスを吹込み、かつ前記内部流路から前記移送ガスを吸込み、
前記内部流路の、前記移送ガスの流れに垂直な断面積をＡ、前記外部流路の、前記移送ガスの流れに垂直な断面積をＢとしたとき、Ｂ／Ａで定義される断面積比が０．６を超えていてもよい。
The gas flow forming device blows the transfer gas into the external flow path and sucks the transfer gas from the internal flow path.
When the cross-sectional area of the internal flow path perpendicular to the flow of the transfer gas is A and the cross-sectional area of the external flow path perpendicular to the flow of the transfer gas is B, the cross-sectional area defined by B / A. The ratio may exceed 0.6.
本発明に係る粉粒体移送方法は、
中空の外管と、前記外管の内面との間に隙間を確保した状態で前記外管の内部に挿通されている中空の内管とによって構成された２重管を有し、前記２重管の先端部が、移送の対象である粉粒体と対向する位置に配置されるノズル部材、
を用いる粉粒体移送方法であって、
前記内管によって構成される内部流路と、前記外管と前記内管との間の前記隙間によって構成される外部流路との一方の流路への移送ガスの吹込みと、他方の流路からの前記移送ガスの吸込みとを開始する開始ステップと、
前記他方の流路又は前記他方の流路と連通した箇所において、前記移送ガスと共に流れている前記粉粒体の密度を計測し、計測した前記密度が予め定められた下限値よりも小さい場合に、前記一方の流路に吹込む前記移送ガスの流量を減少させ、計測した前記密度が予め定められた上限値よりも大きい場合には、前記一方の流路に吹込む前記移送ガスの流量を増大させる吹込みガス流量制御ステップと、
を含む。
The powder or granular material transfer method according to the present invention is
It has a double pipe composed of a hollow outer pipe and a hollow inner pipe inserted into the inside of the outer pipe with a gap secured between the inner surface of the outer pipe. A nozzle member whose tip is arranged at a position facing the powder or granular material to be transferred.
It is a powder and granular material transfer method using
The transfer gas is blown into one flow path of the inner flow path formed by the inner pipe and the outer flow path formed by the gap between the outer pipe and the inner pipe, and the other flow. A start step to start sucking the transfer gas from the road, and
When the density of the powder or granular material flowing together with the transfer gas is measured at the other flow path or the location communicating with the other flow path, and the measured density is smaller than a predetermined lower limit value. , The flow rate of the transfer gas blown into the one flow path is reduced, and when the measured density is larger than a predetermined upper limit value, the flow rate of the transfer gas blown into the one flow path is increased. With increasing blow gas flow control steps,
including.
本発明に係る制御プログラムは、
中空の外管と、前記外管の内面との間に隙間を確保した状態で前記外管の内部に挿通されている中空の内管とによって構成された２重管を有し、前記２重管の先端部が、移送の対象である粉粒体と対向する位置に配置されるノズル部材と、
前記内管によって構成される内部流路と、前記外管と前記内管との間の前記隙間によって構成される外部流路との一方の流路に移送ガスを吹込み、かつ他方の流路から前記移送ガスを吸込むガス流形成装置と、
前記他方の流路又は前記他方の流路と連通した箇所において、前記移送ガスと共に流れている前記粉粒体の密度を計測する密度計測装置と、
を備える粉粒体移送装置における、前記ガス流形成装置を制御するコンピュータに、
前記密度計測装置によって計測された前記密度が予め定められた下限値よりも小さい場合に、前記ガス流形成装置によって前記一方の流路に吹込まれる前記移送ガスの流量が減少し、前記密度計測装置によって計測された前記密度が予め定められた上限値よりも大きい場合には、前記ガス流形成装置によって前記一方の流路に吹込まれる前記移送ガスの流量が増大するように、前記ガス流形成装置を制御する制御機能、
を実現させる。
The control program according to the present invention
It has a double pipe composed of a hollow outer pipe and a hollow inner pipe inserted into the inside of the outer pipe with a gap secured between the outer pipe and the inner surface of the outer pipe. A nozzle member whose tip is arranged at a position facing the powder or granular material to be transferred,
The transfer gas is blown into one flow path of the inner flow path formed by the inner pipe and the outer flow path formed by the gap between the outer pipe and the inner pipe, and the other flow path. A gas flow forming device that sucks the transfer gas from
A density measuring device for measuring the density of the powder or granular material flowing together with the transferred gas at the other flow path or the location communicating with the other flow path.
To a computer that controls the gas flow forming device in the powder or granular material transfer device including
When the density measured by the density measuring device is smaller than a predetermined lower limit value, the flow rate of the transferred gas blown into the one flow path by the gas flow forming device is reduced, and the density measurement is performed. When the density measured by the device is larger than a predetermined upper limit value, the gas flow is increased so that the flow rate of the transferred gas blown into the one flow path by the gas flow forming device is increased. Control function to control the forming device,
To realize.
本発明によれば、他方の流路又は他方の流路と連通した箇所における粉粒体の密度が、予め定められた下限値よりも小さい場合に、一方の流路に吹込まれる移送ガスの流量が減少する。これに伴い、一方の流路から吹出されて他方の流路に吸込まれる移送ガスの量も減少するので、他方の流路を流れる粉粒体の密度が高められる。この結果、粉粒体を効率的に移送することができる。 According to the present invention, when the density of powder or granular material in the other flow path or the portion communicating with the other flow path is smaller than a predetermined lower limit value, the transfer gas blown into one flow path The flow rate decreases. Along with this, the amount of transfer gas blown out from one flow path and sucked into the other flow path also decreases, so that the density of powder or granular material flowing through the other flow path is increased. As a result, the powder or granular material can be efficiently transferred.
一方、他方の流路又は他方の流路と連通した箇所における粉粒体の密度が、予め定められた上限値よりも大きい場合には、一方の流路に吹込まれる移送ガスの流量が増大する。これに伴い、一方の流路から吹出されて他方の流路に吸込まれる移送ガスの量も増大するので、他方の流路を流れる粉粒体の密度が低減される。このため、粉粒体を移送する流路である他方の流路に、閉塞又は脈流が生じにくい。 On the other hand, when the density of the powder or granular material in the other flow path or the portion communicating with the other flow path is larger than the predetermined upper limit value, the flow rate of the transfer gas blown into one flow path increases. To do. Along with this, the amount of transfer gas blown out from one flow path and sucked into the other flow path also increases, so that the density of powder or granular material flowing through the other flow path is reduced. Therefore, blockage or pulsating flow is unlikely to occur in the other flow path, which is the flow path for transferring the powder or granular material.
以下、図面を参照し、実施形態に係る粉粒体移送装置について説明する。図中、同一又は対応する部分に同一の符号を付す。 Hereinafter, the powder or granular material transfer device according to the embodiment will be described with reference to the drawings. In the figure, the same or corresponding parts are designated by the same reference numerals.
図１に示すように、本実施形態に係る粉粒体移送装置７００は、容器６１０に収容されている粉粒体ＰＭを、回収タンク６２０へと移送するものである。粉粒体ＰＭの移送には、移送ガスとしての空気が用いられる。 As shown in FIG. 1, the powder or granular material transfer device 700 according to the present embodiment transfers the powder or granular material PM contained in the container 610 to the recovery tank 620. Air as a transfer gas is used for the transfer of the powder or granular material PM.
粉粒体移送装置７００は、容器６１０から粉粒体ＰＭを空気と一緒に吸込むノズル部材１００と、ノズル部材１００を通して吸込まれた粉粒体ＰＭ及び空気から、粉粒体ＰＭを分離させるサイクロンセパレータ６３０と、サイクロンセパレータ６３０によって分離された粉粒体ＰＭを回収タンク６２０に案内するホッパー６４０とを備える。 The powder or granular material transfer device 700 is a cyclone separator that separates the powder or granular material PM from the nozzle member 100 that sucks the powder or granular material PM from the container 610 together with air and the powder or granular material PM and air that are sucked through the nozzle member 100. A 630 and a hopper 640 that guides the powder or granular material PM separated by the cyclone separator 630 to the recovery tank 620 are provided.
また、粉粒体移送装置７００は、ノズル部材１００から粉粒体ＰＭ及び空気を吸込むための気流を形成する吸込み用送風機２１０と、ノズル部材１００から空気を噴出させるための気流を形成する吹出し用送風機２２０とを備える。吸込み用送風機２１０は、サイクロンセパレータ６３０に接続されており、吹出し用送風機２２０は、ノズル部材１００に接続されている。 Further, the powder / granular material transfer device 700 includes a suction blower 210 that forms an air flow for sucking the powder / granular material PM and air from the nozzle member 100, and a blower for blowing out that forms an air flow for ejecting air from the nozzle member 100. It is equipped with a blower 220. The suction blower 210 is connected to the cyclone separator 630, and the blowout blower 220 is connected to the nozzle member 100.
また、粉粒体移送装置７００は、吸込み用送風機２１０とサイクロンセパレータ６３０との間の空気の流路に配置された吸込み用バルブ６５１と、吹出し用送風機２２０とノズル部材１００との間の空気の流路に配置された吹出し用バルブ６５２とを備える。吸込み用バルブ６５１と吹出し用バルブ６５２の各々は、空気の流れを許容する開状態と、空気の流れを阻止する閉状態とに切り換えが可能である。 Further, the powder or granular material transfer device 700 is a suction valve 651 arranged in the air flow path between the suction blower 210 and the cyclone separator 630, and the air between the blowout blower 220 and the nozzle member 100. It is provided with a blow-out valve 652 arranged in the flow path. Each of the suction valve 651 and the blow-out valve 652 can be switched between an open state that allows the flow of air and a closed state that blocks the flow of air.
図２を参照し、ノズル部材１００の構成及び作用について説明する。図２に示すように、ノズル部材１００は、２重管１３０を有する。２重管１３０は、中空の外管１１０と、外管１１０の内面との間に隙間ＧＰを確保した状態で外管１１０の内部に挿通されている中空の内管１２０とによって構成される。 The configuration and operation of the nozzle member 100 will be described with reference to FIG. As shown in FIG. 2, the nozzle member 100 has a double tube 130. The double pipe 130 is composed of a hollow outer pipe 110 and a hollow inner pipe 120 inserted into the outer pipe 110 with a gap GP secured between the inner surface of the outer pipe 110.
外管１１０と内管１２０の各々は、長さ方向に直交する断面が円形に形成されている。２重管１３０は、上下方向に延在しており、２重管１３０の先端部、具体的には下端部は、粉粒体ＰＭと対向する位置に配置されている。 Each of the outer pipe 110 and the inner pipe 120 has a circular cross section orthogonal to the length direction. The double pipe 130 extends in the vertical direction, and the tip end portion, specifically, the lower end portion of the double pipe 130 is arranged at a position facing the powder or granular material PM.
吹出し用送風機２２０は、外管１１０と内管１２０との間の隙間ＧＰによって構成される外部流路ＯＰに、移送ガスである空気を吹込む。吸込み用送風機２１０は、内管１２０によって構成される内部流路ＩＦから、図１に示したサイクロンセパレータ６３０を介して、移送ガスである空気を吸込む。 The blowing blower 220 blows air, which is a transfer gas, into the outer flow path OP formed by the gap GP between the outer pipe 110 and the inner pipe 120. The suction blower 210 sucks air, which is a transfer gas, from the internal flow path IF formed by the inner pipe 120 via the cyclone separator 630 shown in FIG.
吸込み用送風機２１０及び吹出し用送風機２２０は、内部流路ＩＦと外部流路ＯＦの一方の流路に移送ガスを吹込み、かつ他方の流路から移送ガスを吸込むガス流形成装置の一例である。 The suction blower 210 and the blowout blower 220 are examples of gas flow forming devices that blow transfer gas into one of the internal flow paths IF and the external flow path OF and suck the transfer gas from the other flow path. ..
上記構成によれば、外部流路ＯＦに吹込まれた空気が、２重管１３０の先端部から粉粒体ＰＭに当てられる。空気が当てられた粉粒体ＰＭ及びその空気は、２重管１３０の先端部から内部流路ＩＦに吸込まれる。外部流路ＯＦから粉粒体ＰＭへの空気の噴出が、内部流路ＩＦへの粉粒体ＰＭ及び空気の吸込みを促進する。このため、粉粒体ＰＭの移送の能率を高めることができる。 According to the above configuration, the air blown into the external flow path OF is applied to the powder or granular material PM from the tip of the double pipe 130. The powder or granular material PM to which air is applied and the air thereof are sucked into the internal flow path IF from the tip of the double pipe 130. The ejection of air from the external flow path OF to the powder or granular material PM promotes the suction of the powder or granular material PM and air into the internal flow path IF. Therefore, the efficiency of transfer of the powder or granular material PM can be improved.
なお、内部流路ＩＦに吸込まれた粉粒体ＰＭ及び空気は、図１に示したサイクロンセパレータ６３０に流入し、サイクロンセパレータ６３０において粉粒体ＰＭと空気とが分離される。そして、粉粒体ＰＭは、図１に示した回収タンク６２０に流下する一方、空気は、吸込み用送風機２１０によって外部に排出される。 The powder or granular material PM and air sucked into the internal flow path IF flow into the cyclone separator 630 shown in FIG. 1, and the powder or granular material PM and air are separated by the cyclone separator 630. Then, the powder or granular material PM flows down to the recovery tank 620 shown in FIG. 1, while the air is discharged to the outside by the suction blower 210.
また、ノズル部材１００は、２重管１３０の先端部への粉粒体ＰＭの供給を調整する粉粒体供給調整器１４０を有する。粉粒体供給調整器１４０は、２重管１３０と同心状に外管１１０の外面を取り囲む筒状に形成されており、２重管１３０と同様、上下方向に延在している。粉粒体供給調整器１４０の、粉粒体ＰＭに対面する先端部は開口している。また、粉粒体供給調整器１４０の先端部とは反対の後端部も、空気の流通が可能なように開口している。 Further, the nozzle member 100 has a powder or granular material supply regulator 140 that adjusts the supply of the powder or granular material PM to the tip of the double pipe 130. The powder or granular material supply regulator 140 is formed concentrically with the double pipe 130 in a tubular shape surrounding the outer surface of the outer pipe 110, and extends in the vertical direction like the double pipe 130. The tip of the powder or granular material supply regulator 140 facing the powder or granular material PM is open. Further, the rear end portion opposite to the front end portion of the powder or granular material supply regulator 140 is also opened so that air can flow.
粉粒体供給調整器１４０の先端部は、２重管１３０の先端部よりも上方に位置する。つまり、２重管１３０は、粉粒体供給調整器１４０よりも下方に突出している。粉粒体供給調整器１４０の先端部の位置は、その粉粒体供給調整器１４０の先端部と、２重管１３０の先端部とを結ぶ線分が、水平面に対して粉粒体ＰＭの安息角と等しい角度θだけ傾斜するように、調整されている。 The tip of the powder or granular material supply regulator 140 is located above the tip of the double pipe 130. That is, the double pipe 130 projects downward from the powder or granular material supply regulator 140. The position of the tip of the powder or granular material supply regulator 140 is such that the line segment connecting the tip of the powder or granular material supply regulator 140 and the tip of the double pipe 130 is the position of the powder or granular material PM with respect to the horizontal plane. It is adjusted so that it is tilted by an angle θ equal to the angle of repose.
なお、２重管１３０においては、内管１２０が外管１１０よりも下方に突出している。そして、外管１１０の先端部と、内管１２０の先端部とを結ぶ線分も、水平面に対して角度θだけ傾斜している。 In the double pipe 130, the inner pipe 120 projects below the outer pipe 110. The line segment connecting the tip of the outer pipe 110 and the tip of the inner pipe 120 is also inclined by an angle θ with respect to the horizontal plane.
以上のように、粉粒体供給調整器１４０及び外管１１０によって、安息角と等しい角度θの傾斜が粉粒体ＰＭに形成される。これにより、粉粒体ＰＭが重力によって安息角に沿って内管１２０に向かって流れ込む。このため、内管１２０の先端部に向けて粉粒体ＰＭが連続的に供給され、粉粒体ＰＭの移送の能率を高めることができる。 As described above, the powder or granular material supply regulator 140 and the outer pipe 110 form an inclination of an angle θ equal to the angle of repose in the powder or granular material PM. As a result, the powder or granular material PM flows toward the inner pipe 120 along the angle of repose by gravity. Therefore, the powder or granular material PM is continuously supplied toward the tip of the inner pipe 120, and the efficiency of transfer of the powder or granular material PM can be improved.
図１に戻って、説明を続ける。粉粒体移送装置７００は、吸込み用送風機２１０によって吸込まれる空気の流量（以下、吸込み空気流量という。）を計測する流量計測装置３００を備える。流量計測装置３００は、サイクロンセパレータ６３０と吸込み用送風機２１０との間の、空気の流路に配置されている。 Returning to FIG. 1, the description will be continued. The powder or granular material transfer device 700 includes a flow rate measuring device 300 that measures the flow rate of air sucked by the suction blower 210 (hereinafter, referred to as a suction air flow rate). The flow rate measuring device 300 is arranged in the air flow path between the cyclone separator 630 and the suction blower 210.
ノズル部材１００の先端からサイクロンセパレータ６３０までの流路に粉粒体ＰＭが詰まった場合には、たとえ吸込み用送風機２１０が作動していても、吸込み用送風機２１０によって吸込まれる吸込み空気流量が著しく低下する。そこで、流量計測装置３００によって計測された吸込み空気流量の値によって、粉粒体ＰＭの詰まりが発生しているか否かを検知することができる。 When the flow path from the tip of the nozzle member 100 to the cyclone separator 630 is clogged with the powder or granular material PM, the flow rate of the suction air sucked by the suction blower 210 is remarkable even if the suction blower 210 is operating. descend. Therefore, it is possible to detect whether or not the powder or granular material PM is clogged by the value of the suction air flow rate measured by the flow rate measuring device 300.
また、粉粒体移送装置７００は、図２に示した内部流路ＩＦと連通した箇所において、空気と共に流れている粉粒体ＰＭの密度を計測する密度計測装置４００を備える。密度計測装置４００は、ノズル部材１００からサイクロンセパレータ６３０に至る流路、具体的には、図２に示した内部流路ＩＦと、サイクロンセパレータ６３０とを接続する接続管６６０の脇に配置されている。 Further, the powder or granular material transfer device 700 includes a density measuring device 400 for measuring the density of the powder or granular material PM flowing together with the air at a position communicating with the internal flow path IF shown in FIG. The density measuring device 400 is arranged beside the flow path from the nozzle member 100 to the cyclone separator 630, specifically, the connection pipe 660 connecting the internal flow path IF shown in FIG. 2 and the cyclone separator 630. There is.
図３に示すように、密度計測装置４００は、撮像素子を有するカメラ４１０と、カメラ４１０によって撮影されて得られた画像を解析する画像解析部４２０とを備える。接続管６６０の一部は、カメラ４１０の撮像素子が捉える光、具体的には、可視光に対して透明な透明部材６６１によって構成されている。 As shown in FIG. 3, the density measuring device 400 includes a camera 410 having an image pickup element and an image analysis unit 420 that analyzes an image taken by the camera 410 and obtained. A part of the connecting tube 660 is composed of a transparent member 661 that is transparent to the light captured by the image sensor of the camera 410, specifically, visible light.
カメラ４１０は、接続管６６０を空気と共に流れている粉粒体ＰＭを、透明部材６６１を通して撮影する。カメラ４１０による撮影は、予め定められたサンプリング周波数で繰り返し行われる。画像解析部４２０は、カメラによって撮影されて得られた画像を解析することにより、粉粒体ＰＭの密度、具体的には、単位体積あたりの粒子の数を表す物理量を求める。なお、画像解析部４２０が行う画像の解析には、画像濃度を求める処理、２値化、背景差分といったデジタル画像処理が含まれる。 The camera 410 takes a picture of the powder or granular material PM flowing through the connecting pipe 660 together with the air through the transparent member 661. Shooting by the camera 410 is repeated at a predetermined sampling frequency. The image analysis unit 420 analyzes the image taken by the camera to obtain the density of the powder or granular material PM, specifically, a physical quantity representing the number of particles per unit volume. The image analysis performed by the image analysis unit 420 includes digital image processing such as image density determination processing, binarization, and background subtraction.
図１に戻って、説明を続ける。粉粒体移送装置７００は、容器６１０から回収タンク６２０へと粉粒体ＰＭを移送するために、吸込み用送風機２１０、吸込み用バルブ６５１、吹出し用送風機２２０、及び吹出し用バルブ６５２を制御する移送制御を行う制御装置５００を備える。 Returning to FIG. 1, the description will be continued. The powder / granular material transfer device 700 controls a suction blower 210, a suction valve 651, a blowout blower 220, and a blowout valve 652 in order to transfer the powder / granular material PM from the container 610 to the recovery tank 620. A control device 500 for controlling is provided.
制御装置５００は、移送制御において、吸込み用送風機２１０の回転数を一定に保ったまま、流量計測装置３００及び密度計測装置４００の計測結果を用いて、吹出し用送風機２２０の回転数を制御する。 In the transfer control, the control device 500 controls the rotation speed of the blowout blower 220 by using the measurement results of the flow rate measuring device 300 and the density measuring device 400 while keeping the rotation speed of the suction blower 210 constant.
制御装置５００は、制御プログラム５１０を記憶している。以下、制御装置５００が制御プログラム５１０を実行することで実現される移送制御について、具体的に説明する。 The control device 500 stores the control program 510. Hereinafter, the transfer control realized by the control device 500 executing the control program 510 will be specifically described.
図４に示すように、まず、制御装置５００は、粉粒体ＰＭの移送を開始する旨のユーザの指示を受けて、吸込み用バルブ６５１及び吹出し用バルブ６５２を開き、かつ吸込み用送風機２１０及び吹出し用送風機２２０の作動を開始させる（ステップＳ１１）。 As shown in FIG. 4, first, the control device 500 opens the suction valve 651 and the blow-out valve 652 in response to the user's instruction to start the transfer of the powder or granular material PM, and the suction blower 210 and The operation of the blower blower 220 is started (step S11).
これにより、吹出し用送風機２２０によって外部流路ＯＦに吹込まれた空気が、２重管１３０の先端部から粉粒体ＰＭに当てられ、空気が当てられた粉粒体ＰＭ及びその空気が、２重管１３０の先端部から内部流路ＩＦに吸込まれる。 As a result, the air blown into the external flow path OF by the blower 220 is applied to the powder or granular material PM from the tip of the double pipe 130, and the powder or granular material PM to which the air is applied and the air thereof are 2 It is sucked into the internal flow path IF from the tip of the heavy pipe 130.
内部流路ＩＦに吸込まれた粉粒体ＰＭ及び空気は、サイクロンセパレータ６３０に流入し、サイクロンセパレータ６３０において粉粒体ＰＭと空気とが分離される。そして、粉粒体ＰＭは、回収タンク６２０に流下する一方、空気は、吸込み用送風機２１０によって外部に排出される。このようにして、粉粒体ＰＭの移送が開始する。つまり、ステップＳ１１は、粉粒体ＰＭの移送を開始する開始ステップの一例である。 The powder or granular material PM and air sucked into the internal flow path IF flow into the cyclone separator 630, and the powder or granular material PM and air are separated by the cyclone separator 630. Then, the powder or granular material PM flows down to the recovery tank 620, while the air is discharged to the outside by the suction blower 210. In this way, the transfer of the powder or granular material PM is started. That is, step S11 is an example of a start step for starting the transfer of the powder or granular material PM.
次に、制御装置５００は、粉粒体ＰＭの流れが定常化するのに要する時間として予め定められた一定時間だけ待機する（ステップＳ１２）。 Next, the control device 500 waits for a predetermined fixed time as the time required for the flow of the powder or granular material PM to become steady (step S12).
次に、制御装置５００は、密度計測装置４００によって計測された粉粒体ＰＭの密度が、効率的な移送を保証するために予め定められた下限値以上であり、かつ、閉塞及び脈流を抑制するために予め定められた上限値以下であるか否かを判定する（ステップＳ１３）。 Next, in the control device 500, the density of the powder or granular material PM measured by the density measuring device 400 is equal to or higher than a predetermined lower limit value for ensuring efficient transfer, and the blockage and pulsating flow are prevented. It is determined whether or not it is equal to or less than a predetermined upper limit value for suppressing (step S13).
制御装置５００は、ステップＳ１３で粉粒体ＰＭの密度が下限値よりも小さい場合は（ステップＳ１３；粉粒体の密度＜下限値）、吸込み用送風機２１０の回転数を一定に保ったまま、吹出し用送風機２２０の回転数を低下させることにより、吹出し用送風機２２０によって外部流路ＯＦに吹込まれる空気の量（以下、吹込み空気流量という。）を減少させる（ステップＳ１４）。 When the density of the powder or granular material PM is smaller than the lower limit value in step S13 (step S13; density of the powder or granular material <lower limit value), the control device 500 keeps the rotation speed of the suction blower 210 constant. By reducing the rotation speed of the blow-out blower 220, the amount of air blown into the external flow path OF by the blow-out blower 220 (hereinafter, referred to as blow-in air flow rate) is reduced (step S14).
これにより、外部流路ＯＦから吹出されて内部流路ＩＦに吸込まれる空気の量も減少するので、内部流路ＩＦを流れる粉粒体ＰＭの密度が高められる。この結果、粉粒体ＰＭを効率的に移送することができるようになる。 As a result, the amount of air blown out from the outer flow path OF and sucked into the inner flow path IF is also reduced, so that the density of the powder or granular material PM flowing through the inner flow path IF is increased. As a result, the powder or granular material PM can be efficiently transferred.
一方、制御装置５００は、ステップＳ１３で粉粒体ＰＭの密度が上限値よりも大きい場合は（ステップＳ１３；粉粒体の密度＞上限値）、吸込み用送風機２１０の回転数を一定に保ったまま、吹出し用送風機２２０の回転数を高めることにより、吹出し用送風機２２０によって外部流路ＯＦに吹込まれる吹込み空気流量を増大させる（ステップＳ１５）。 On the other hand, when the density of the powder or granular material PM is larger than the upper limit value in step S13 (step S13; the density of the powder or granular material> the upper limit value), the control device 500 keeps the rotation speed of the suction blower 210 constant. As it is, by increasing the rotation speed of the blower blower 220, the flow rate of the blown air blown into the external flow path OF by the blower blower 220 is increased (step S15).
これにより、外部流路ＯＦから吹出されて内部流路ＩＦに吸込まれる空気の量も増大するので、内部流路ＩＦを流れる粉粒体ＰＭの密度が低減される。このため、内部流路ＩＦを含む、ノズル部材１００から回収タンク６２０までの粉粒体ＰＭの流路に、閉塞又は脈流が生じにくい。 As a result, the amount of air blown out from the outer flow path OF and sucked into the inner flow path IF also increases, so that the density of the powder or granular material PM flowing through the inner flow path IF is reduced. Therefore, blockage or pulsating flow is unlikely to occur in the flow path of the powder or granular material PM from the nozzle member 100 to the recovery tank 620, including the internal flow path IF.
なお、上述したステップＳ１４及びステップＳ１５は、外部流路ＯＦに吹込む移送ガスの流量を制御する吹込みガス流量制御ステップの一例である。 The above-mentioned steps S14 and S15 are examples of a blown gas flow rate control step for controlling the flow rate of the transferred gas blown into the external flow path OF.
一方、制御装置５００は、ステップＳ１３で粉粒体ＰＭの密度が下限値以上かつ上限値以下である場合（ステップＳ１３；ＹＥＳ）、又はステップＳ１４若しくはステップＳ１５を経た後は、流量計測装置３００によって計測された、吸込み用送風機２１０によって吸込まれる吸込み空気流量が、正常に空気が流れていることを表す閾値以上であるか否かを判定する（ステップＳ１６）。 On the other hand, when the density of the powder or granular material PM is equal to or more than the lower limit value and equal to or less than the upper limit value in step S13 (step S13; YES), or after passing through step S14 or step S15, the control device 500 is subjected to the flow rate measuring device 300. It is determined whether or not the measured suction air flow rate sucked by the suction blower 210 is equal to or greater than a threshold value indicating that air is flowing normally (step S16).
制御装置５００は、ステップＳ１６で吸込み空気流量が閾値未満である場合は（ステップＳ１６；ＮＯ）、ノズル部材１００の先端からサイクロンセパレータ６３０までの流路に粉粒体ＰＭが詰まっていることを表すので、移送制御を終了する。この場合、ユーザによって粉粒体ＰＭの詰まりが除去された後に、移送制御を再び開始することができる。 When the suction air flow rate is less than the threshold value in step S16 (step S16; NO), the control device 500 indicates that the flow path from the tip of the nozzle member 100 to the cyclone separator 630 is clogged with the powder or granular material PM. Therefore, the transfer control is terminated. In this case, the transfer control can be restarted after the clogging of the powder or granular material PM is cleared by the user.
制御装置５００は、ステップＳ１６で吸込み空気流量が閾値以上である場合は（ステップＳ１６；ＹＥＳ）、ノズル部材１００の先端からサイクロンセパレータ６３０までの流路において粉粒体ＰＭが正常に流れていることを表すので、粉粒体ＰＭの移送を終了する旨のユーザの指示の有無を判定する（ステップＳ１７）。 In the control device 500, when the suction air flow rate is equal to or higher than the threshold value in step S16 (step S16; YES), the powder or granular material PM is normally flowing in the flow path from the tip of the nozzle member 100 to the cyclone separator 630. (Step S17), it is determined whether or not there is a user's instruction to end the transfer of the powder or granular material PM.
そして、制御装置５００は、粉粒体ＰＭの移送をまだ終了しない場合は（ステップＳ１７；ＮＯ）、ステップＳ１３に戻る。一方、制御装置５００は、粉粒体ＰＭの移送を終了する旨のユーザの指示が有った場合は（ステップＳ１７；ＹＥＳ）、移送制御を終了する。 Then, if the transfer of the powder or granular material PM is not yet completed (step S17; NO), the control device 500 returns to step S13. On the other hand, the control device 500 ends the transfer control when there is a user instruction to end the transfer of the powder or granular material PM (step S17; YES).
以下、２重管１３０の最適な形状を模索するために行った実験結果について述べる。 Hereinafter, the results of experiments conducted to search for the optimum shape of the double pipe 130 will be described.
内部流路ＩＦの、空気の流れに垂直な断面積をＡとし、外部流路ＯＦの、空気の流れに垂直な断面積をＢとしたとき、Ｂ／Ａで定義される断面積比と、粉粒体ＰＭの移送のエネルギー効率との関係を調べるために、実施例１及び２に係る２種類の２重管１３０を作成した。 When the cross-sectional area of the internal flow path IF perpendicular to the air flow is A and the cross-sectional area of the external flow path OF perpendicular to the air flow is B, the cross-sectional area ratio defined by B / A and In order to investigate the relationship with the energy efficiency of the transfer of the powder or granular material PM, two types of double tubes 130 according to Examples 1 and 2 were prepared.
実施例１に係る２重管１３０は、直径が４０［ｍｍ］の内管１２０と、直径が５０．６［ｍｍ］の外管１１０とによって構成され、断面積比Ｂ／Ａ＝０．６である。実施例２に係る２重管１３０は、直径が４０［ｍｍ］の内管１２０と、直径が５５［ｍｍ］の外管１１０とによって構成され、断面積比Ｂ／Ａ＝０．９である。 The double pipe 130 according to the first embodiment is composed of an inner pipe 120 having a diameter of 40 [mm] and an outer pipe 110 having a diameter of 50.6 [mm], and has a cross-sectional area ratio B / A = 0.6. Is. The double pipe 130 according to the second embodiment is composed of an inner pipe 120 having a diameter of 40 [mm] and an outer pipe 110 having a diameter of 55 [mm], and has a cross-sectional area ratio B / A = 0.9. ..
粉粒体ＰＭの移送のエネルギー効率を表す評価指標としては、ノズル効率を採用した。ノズル効率は、粉粒体ＰＭが特定の高さ位置まで移送されることで得た位置エネルギーをＸ、空気が上記特定の高さ位置まで流れる過程で失ったエネルギーをＹとしたとき、Ｘ／Ｙで定義される。 Nozzle efficiency was adopted as an evaluation index indicating the energy efficiency of transfer of powder or granular material PM. The nozzle efficiency is X / when the potential energy obtained by transferring the powder or granular material PM to a specific height position is X and the energy lost in the process of air flowing to the specific height position is Y. Defined by Y.
分母Ｙは、内部流路ＩＦを流れる吸込み流が、内管１２０の先端部から上記特定の高さの位置（以下、第１測定点という。）まで流れる間に行った第１仕事Ｗ１と、外部流路ＯＦを流れる吹出し流が、上記第１測定点と同じ高さの位置（以下、第２測定点という。）から外管１１０の先端部まで流れる過程で行った第２仕事Ｗ２との和である。 The denominator Y is the first work W1 performed while the suction flow flowing through the internal flow path IF flows from the tip end portion of the inner pipe 120 to the position at the specific height (hereinafter referred to as the first measurement point). With the second work W2 performed in the process in which the blowout flow flowing through the external flow path OF flows from the position at the same height as the first measurement point (hereinafter referred to as the second measurement point) to the tip of the outer pipe 110. It is a sum.
第１仕事Ｗ１は、上記第１測定点の圧力と大気圧との差に、吸込み流の、ノズル効率を測定する期間（以下、単に測定期間という。）にわたる体積流量Ｑ１をかけ算することで求まる。第２仕事Ｗ２は、上記第２測定点の圧力と大気圧との差に、吹出し流の、測定期間にわたる体積流量Ｑ２をかけ算することで求まる。 The first work W1 can be obtained by multiplying the difference between the pressure at the first measurement point and the atmospheric pressure by the volume flow rate Q1 of the suction flow over the period for measuring the nozzle efficiency (hereinafter, simply referred to as the measurement period). .. The second work W2 can be obtained by multiplying the difference between the pressure at the second measurement point and the atmospheric pressure by the volumetric flow rate Q2 of the blowout flow over the measurement period.
分子Ｘは、粉粒体ＰＭの測定期間にわたる質量流量に、内管１２０の先端部から上記第１測定点までの高さをかけ算することで求まる。なお、ノズル効率Ｘ／Ｙは、計測時間にわたる平均値を指す。 The molecule X can be obtained by multiplying the mass flow rate of the powder or granular material PM over the measurement period by the height from the tip of the inner tube 120 to the first measurement point. The nozzle efficiency X / Y refers to an average value over the measurement time.
ノズル効率Ｘ／Ｙは、吸込み用送風機２１０及び吹出し用送風機２２０が出力したエネルギーのうちのどの程度が粉粒体ＰＭの移送に利用されたかを表す。ノズル効率Ｘ／Ｙが大きい程、エネルギー効率がよい。換言すると、吸込み用送風機２１０及び吹出し用送風機２２０における消費電力が同じ場合、ノズル効率Ｘ／Ｙが大きい程、より多くの粉粒体ＰＭを移送できる。 The nozzle efficiency X / Y indicates how much of the energy output by the suction blower 210 and the blowout blower 220 is used for the transfer of the powder or granular material PM. The larger the nozzle efficiency X / Y, the better the energy efficiency. In other words, when the power consumption of the suction blower 210 and the blowout blower 220 is the same, the larger the nozzle efficiency X / Y, the more powder or granular material PM can be transferred.
以上説明したノズル効率Ｘ／Ｙは、流量比Ｑ２／Ｑ１を異ならせた複数の条件下の各々において測定した。流量比Ｑ２／Ｑ１とは、上述した吹出し流の測定期間にわたる体積流量Ｑ２を、上述した吸込み流の測定期間にわたる体積流量Ｑ１で割り算した値である。流量比Ｑ２／Ｑ１は、Ｑ１を固定し、Ｑ２を調整することにより、変化させた。 The nozzle efficiency X / Y described above was measured under each of a plurality of conditions in which the flow rate ratios Q2 / Q1 were different. The flow rate ratio Q2 / Q1 is a value obtained by dividing the volume flow rate Q2 over the measurement period of the blowout flow described above by the volume flow rate Q1 over the measurement period of the suction flow described above. The flow rate ratio Q2 / Q1 was changed by fixing Q1 and adjusting Q2.
図５に、測定結果のグラフを示す。横軸は、流量比Ｑ２／Ｑ１を示し、縦軸は、ノズル効率Ｘ／Ｙを示す。いずれの流量比Ｑ２／Ｑ１においても、四角印でプロットした実施例２の方が、三角印でプロットした実施例１よりも、ノズル効率Ｘ／Ｙが概ね３倍程度大きいことが分かる。 FIG. 5 shows a graph of the measurement results. The horizontal axis represents the flow rate ratio Q2 / Q1, and the vertical axis represents the nozzle efficiency X / Y. In any of the flow rate ratios Q2 / Q1, it can be seen that the nozzle efficiency X / Y of Example 2 plotted with square marks is about three times higher than that of Example 1 plotted with triangle marks.
つまり、内部流路ＩＦの断面積Ａと、外部流路ＯＦの断面積Ｂとの比である断面積比Ｂ／Ａが大きい程、エネルギー効率が高い。以上の結果より、２重管１３０の断面積比Ｂ／Ａは、０．６を超えることが好ましく、０．９以上であることがより好ましいと言える。 That is, the larger the cross-sectional area ratio B / A, which is the ratio of the cross-sectional area A of the internal flow path IF to the cross-sectional area B of the external flow path OF, the higher the energy efficiency. From the above results, it can be said that the cross-sectional area ratio B / A of the double pipe 130 is preferably more than 0.6, more preferably 0.9 or more.
また、既述のように、流量比Ｑ２／Ｑ１の調整においては、吸込み流の体積流量Ｑ１を固定したにも関わらず、図５に示すように、ノズル効率Ｘ／Ｙが流量比Ｑ２／Ｑ１に依存する。具体的には、流量比Ｑ２／Ｑ１が大きい程、ノズル効率Ｘ／Ｙが小さい。 Further, as described above, in the adjustment of the flow rate ratio Q2 / Q1, the nozzle efficiency X / Y is the flow rate ratio Q2 / Q1 as shown in FIG. 5, although the volumetric flow rate Q1 of the suction flow is fixed. Depends on. Specifically, the larger the flow rate ratio Q2 / Q1, the smaller the nozzle efficiency X / Y.
これは、吹出し流の体積流量Ｑ２が大きい程、その吹出し流によって、多くの粉粒体ＰＭが２重管１３０の径方向外方に吹き飛ばされるため、内部流路ＩＦに吸込まれる粉粒体ＰＭの密度が減少したことによる。 This is because as the volumetric flow rate Q2 of the blowout flow increases, more powder or granular material PM is blown outward in the radial direction of the double pipe 130 by the blowout flow, so that the powder or granular material is sucked into the internal flow path IF. This is due to the decrease in PM density.
以上、本発明の実施形態について説明した。本発明はこれに限られず、以下に述べる変形も可能である。 The embodiment of the present invention has been described above. The present invention is not limited to this, and the modifications described below are also possible.
上記実施形態では、内部流路ＩＦから空気を吸込み、外部流路ＯＦに空気を吹込む構成を例示したが、外部流路ＯＦから空気を吸込み、内部流路ＩＦに空気を吹込んでもよい。また、移送ガスは空気に限られず、アルゴン、窒素、二酸化炭素等の不活性ガスであってもよい。 In the above embodiment, the configuration in which air is sucked from the internal flow path IF and air is blown into the external flow path OF is illustrated, but air may be sucked from the external flow path OF and air may be blown into the internal flow path IF. Further, the transfer gas is not limited to air, and may be an inert gas such as argon, nitrogen, or carbon dioxide.
また、上記実施形態では、２重管１３０を構成する外管１１０及び内管１２０として、それぞれ断面が円形のものを用いたが、外管１１０及び内管１２０は、断面が円形のものに限られない。外管１１０及び内管１２０の断面は、三角形、四角形等の多角形であってもよい。 Further, in the above embodiment, as the outer pipe 110 and the inner pipe 120 constituting the double pipe 130, those having a circular cross section are used, respectively, but the outer pipe 110 and the inner pipe 120 are limited to those having a circular cross section. I can't. The cross section of the outer pipe 110 and the inner pipe 120 may be a polygon such as a triangle or a quadrangle.
上記実施形態において、図２には、２重管１３０の先端部が粉粒体ＰＭから離れている様子を例示したが、２重管１３０の先端部は、粉粒体ＰＭに挿入されていてもよいし、粉粒体ＰＭに接していてもよい。 In the above embodiment, FIG. 2 illustrates how the tip of the double tube 130 is separated from the powder or granular material PM, but the tip of the double tube 130 is inserted into the powder or granular material PM. It may be in contact with the powder or granular material PM.
また、本明細書において、粉粒体ＰＭとは、土、砂、砂利、セメント、小麦粉といった、粒状の物質の集合体のみならず、塵埃、煤塵、火山灰といった、塵状の物質の集合体も含む概念とする。 Further, in the present specification, the granular material PM is not only an aggregate of granular substances such as soil, sand, gravel, cement and wheat flour, but also an aggregate of dust-like substances such as dust, soot and volcanic ash. It is a concept that includes.
また、図１に示した制御プログラム５１０をコンピュータにインストールすることで、そのコンピュータを制御装置５００として機能させることができる。制御プログラム５１０は、通信回線を通じて配布することもできるし、光ディスク、磁気ディスク、フラッシュメモリ等のコンピュータ読み取り可能な記録媒体に格納して配布することもできる。 Further, by installing the control program 510 shown in FIG. 1 on a computer, the computer can function as the control device 500. The control program 510 can be distributed through a communication line, or can be stored and distributed in a computer-readable recording medium such as an optical disk, a magnetic disk, or a flash memory.
１００…ノズル部材、
１１０…外管、
１２０…内管、
１３０…２重管、
１４０…粉粒体供給調整器、
２１０…吸込み用送風機（ガス流形成装置）、
２２０…吹出し用送風機（ガス流形成装置）、
３００…流量計測装置、
４００…密度計測装置、
４１０…カメラ、
４２０…画像解析部、
５００…制御装置、
５１０…制御プログラム、
６１０…容器、
６２０…回収タンク、
６３０…サイクロンセパレータ、
６４０…ホッパー、
６５１…吸込み用バルブ、
６５２…吹出し用バルブ、
６６０…接続管、
６６１…透明部材、
７００…粉粒体移送装置、
ＧＰ…隙間、
ＩＦ…内部流路、
ＯＦ…外部流路、
ＰＭ…粉粒体。
100 ... Nozzle member,
110 ... outer tube,
120 ... Inner tube,
130 ... Double pipe,
140 ... Powder or granular material supply regulator,
210 ... Suction blower (gas flow forming device),
220 ... Blower for blowing out (gas flow forming device),
300 ... Flow measuring device,
400 ... Density measuring device,
410 ... Camera,
420 ... Image analysis department,
500 ... Control device,
510 ... Control program,
610 ... container,
620 ... Recovery tank,
630 ... Cyclone separator,
640 ... Hopper,
651 ... Suction valve,
652 ... Blow-out valve,
660 ... Connection pipe,
661 ... Transparent member,
700 ... Powder and granular material transfer device,
GP ... Gap,
IF ... Internal flow path,
OF ... External flow path,
PM ... Granular material.
Claims (5)
前記内管によって構成される内部流路と、前記外管と前記内管との間の前記隙間によって構成される外部流路との一方の流路に移送ガスを吹込み、かつ他方の流路から前記移送ガスを吸込むガス流形成装置と、
前記他方の流路又は前記他方の流路と連通した箇所において、前記移送ガスと共に流れている前記粉粒体の密度を計測する密度計測装置と、
前記密度計測装置によって計測された前記密度が予め定められた下限値よりも小さい場合に、前記ガス流形成装置によって前記一方の流路に吹込まれる前記移送ガスの流量が減少し、前記密度計測装置によって計測された前記密度が予め定められた上限値よりも大きい場合には、前記ガス流形成装置によって前記一方の流路に吹込まれる前記移送ガスの流量が増大するように、前記ガス流形成装置を制御する制御装置と、
を備える、粉粒体移送装置。 It has a double pipe composed of a hollow outer pipe and a hollow inner pipe inserted into the inside of the outer pipe with a gap secured between the outer pipe and the inner surface of the outer pipe. A nozzle member whose tip is arranged at a position facing the powder or granular material to be transferred,
The transfer gas is blown into one flow path of the inner flow path formed by the inner pipe and the outer flow path formed by the gap between the outer pipe and the inner pipe, and the other flow path. A gas flow forming device that sucks the transfer gas from
A density measuring device for measuring the density of the powder or granular material flowing together with the transferred gas at the other flow path or the location communicating with the other flow path.
When the density measured by the density measuring device is smaller than a predetermined lower limit value, the flow rate of the transferred gas blown into the one flow path by the gas flow forming device is reduced, and the density measurement is performed. When the density measured by the device is larger than a predetermined upper limit value, the gas flow is increased so that the flow rate of the transferred gas blown into the one flow path by the gas flow forming device is increased. A control device that controls the forming device and
A powder or granular material transfer device.
前記他方の流路又は前記他方の流路と連通した箇所において、前記移送ガスと共に流れている前記粉粒体を撮影するカメラと、
前記カメラによって撮影されて得られた画像を解析することにより、前記粉粒体の前記密度を求める画像解析部と、
を有する、請求項１に記載の粉粒体移送装置。 The density measuring device
A camera that photographs the powder or granular material flowing together with the transfer gas at the other flow path or a portion communicating with the other flow path.
An image analysis unit that obtains the density of the powder or granular material by analyzing an image taken by the camera and obtained.
The powder or granular material transfer device according to claim 1.
前記内部流路の、前記移送ガスの流れに垂直な断面積をＡ、前記外部流路の、前記移送ガスの流れに垂直な断面積をＢとしたとき、Ｂ／Ａで定義される断面積比が０．６を超える、
請求項１又は２に記載の粉粒体移送装置。 The gas flow forming device blows the transfer gas into the external flow path and sucks the transfer gas from the internal flow path.
When the cross-sectional area of the internal flow path perpendicular to the flow of the transfer gas is A and the cross-sectional area of the external flow path perpendicular to the flow of the transfer gas is B, the cross-sectional area defined by B / A. The ratio exceeds 0.6,
The powder or granular material transfer device according to claim 1 or 2.
を用いる粉粒体移送方法であって、
前記内管によって構成される内部流路と、前記外管と前記内管との間の前記隙間によって構成される外部流路との一方の流路への移送ガスの吹込みと、他方の流路からの前記移送ガスの吸込みとを開始する開始ステップと、
前記他方の流路又は前記他方の流路と連通した箇所において、前記移送ガスと共に流れている前記粉粒体の密度を計測し、計測した前記密度が予め定められた下限値よりも小さい場合に、前記一方の流路に吹込む前記移送ガスの流量を減少させ、計測した前記密度が予め定められた上限値よりも大きい場合には、前記一方の流路に吹込む前記移送ガスの流量を増大させる吹込みガス流量制御ステップと、
を含む、粉粒体移送方法。 It has a double pipe composed of a hollow outer pipe and a hollow inner pipe inserted into the inside of the outer pipe with a gap secured between the inner surface of the outer pipe. A nozzle member whose tip is arranged at a position facing the powder or granular material to be transferred.
It is a powder and granular material transfer method using
The transfer gas is blown into one flow path of the inner flow path formed by the inner pipe and the outer flow path formed by the gap between the outer pipe and the inner pipe, and the other flow. A start step to start sucking the transfer gas from the road, and
When the density of the powder or granular material flowing together with the transfer gas is measured at the other flow path or the location communicating with the other flow path, and the measured density is smaller than a predetermined lower limit value. , The flow rate of the transfer gas blown into the one flow path is reduced, and when the measured density is larger than a predetermined upper limit value, the flow rate of the transfer gas blown into the one flow path is increased. With increasing blow gas flow control steps,
A method for transferring powders and granules, including.
前記内管によって構成される内部流路と、前記外管と前記内管との間の前記隙間によって構成される外部流路との一方の流路に移送ガスを吹込み、かつ他方の流路から前記移送ガスを吸込むガス流形成装置と、
前記他方の流路又は前記他方の流路と連通した箇所において、前記移送ガスと共に流れている前記粉粒体の密度を計測する密度計測装置と、
を備える粉粒体移送装置における、前記ガス流形成装置を制御するコンピュータに、
前記密度計測装置によって計測された前記密度が予め定められた下限値よりも小さい場合に、前記ガス流形成装置によって前記一方の流路に吹込まれる前記移送ガスの流量が減少し、前記密度計測装置によって計測された前記密度が予め定められた上限値よりも大きい場合には、前記ガス流形成装置によって前記一方の流路に吹込まれる前記移送ガスの流量が増大するように、前記ガス流形成装置を制御する制御機能、
を実現させる、制御プログラム。 It has a double pipe composed of a hollow outer pipe and a hollow inner pipe inserted into the inside of the outer pipe with a gap secured between the outer pipe and the inner surface of the outer pipe. A nozzle member whose tip is arranged at a position facing the powder or granular material to be transferred,
The transfer gas is blown into one flow path of the inner flow path formed by the inner pipe and the outer flow path formed by the gap between the outer pipe and the inner pipe, and the other flow path. A gas flow forming device that sucks the transfer gas from
A density measuring device for measuring the density of the powder or granular material flowing together with the transferred gas at the other flow path or the location communicating with the other flow path.
To a computer that controls the gas flow forming device in the powder or granular material transfer device including
When the density measured by the density measuring device is smaller than a predetermined lower limit value, the flow rate of the transferred gas blown into the one flow path by the gas flow forming device is reduced, and the density measurement is performed. When the density measured by the device is larger than a predetermined upper limit value, the gas flow is increased so that the flow rate of the transferred gas blown into the one flow path by the gas flow forming device is increased. Control function to control the forming device,
A control program that realizes.
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| US11858757B2 (en) | 2021-12-28 | 2024-01-02 | Mitsubishi Heavy Industries, Ltd. | Control device, granular material supply system, control method, and program |
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