JPH09110164A - Plugging preventing method for transport piping of powder material - Google Patents
Plugging preventing method for transport piping of powder materialInfo
- Publication number
- JPH09110164A JPH09110164A JP29372795A JP29372795A JPH09110164A JP H09110164 A JPH09110164 A JP H09110164A JP 29372795 A JP29372795 A JP 29372795A JP 29372795 A JP29372795 A JP 29372795A JP H09110164 A JPH09110164 A JP H09110164A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- raw material
- powder raw
- transportation
- pipe
- 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.)
- Pending
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- Control Of Conveyors (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は粉体原料を供給槽か
ら配合槽に空気輸送する際に、その輸送配管詰まりを防
止する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing clogging of a transportation pipe when a powder raw material is pneumatically transported from a supply tank to a mixing tank.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】歯磨剤
や化粧品クリーム等のようにペースト状、クリーム状又
は粉状製品を製造する場合、例えば該製品が歯磨剤であ
れば、研磨剤や発泡剤を数種程度用意し、製品系列毎に
これら粉体原料のうち所定のものを所定量配合槽に供給
することが必要である。この場合、これらの各種粉体原
料は、それぞれ所定の供給槽に保管されており、各製造
ライン毎にその配合組成に従って計量されて、配合槽内
に投入・混合されるため、各種粉体原料をいかに効率よ
く計量して配合槽に供給するかが上記のようなペースト
状、クリーム状又は粉状製品の製造過程の効率化におけ
る課題となっている。2. Description of the Related Art When manufacturing a paste-like, cream-like or powdery product such as a dentifrice or a cosmetic cream, if the product is a dentifrice, for example, an abrasive or foaming agent is used. It is necessary to prepare several kinds of agents and supply a predetermined amount of these powder raw materials to the mixing tank for each product series. In this case, since these various powder raw materials are respectively stored in predetermined supply tanks, each production line is weighed according to the blended composition, and is charged and mixed in the blending tank, various powder raw materials are How to efficiently measure and supply the mixture to the blending tank has been a problem in improving the efficiency of the production process of the paste-like, cream-like or powdery product as described above.
【０００３】従来、上記のような粉体原料を配合槽に仕
込む方法としては、例えば図２に示すように、供給槽１
内の粉体原料を供給槽１下部のロータリーバルブ２によ
り輸送配管３内に供給すると共に、ブロアー等の空気輸
送装置４から輸送配管３に空気を供給して粉体原料をバ
ッグフィルター等の集塵機５を備えた貯蔵槽６に空気輸
送し、ここに一旦ストレージし、その後、貯蔵槽６内の
粉体原料を貯蔵槽６下部のロータリーバルブ７を使用し
てロードセル８及びエアベント９ａが付設された計量槽
９内に所定量となるように計量しながら供給し、その
後、計量槽９下部の開閉バルブ１０，１０’を開けて、
計量槽９内に計量供給された粉体原料の全量をバルブ１
１ａを介してエアベント１１ｂが付設された配合槽１１
内に排出して投入する方法が採用されている。Conventionally, as a method for charging the powder raw material as described above into a mixing tank, for example, as shown in FIG.
The powder raw material therein is supplied into the transport pipe 3 by the rotary valve 2 below the supply tank 1, and air is supplied from the air transport device 4 such as a blower to the transport pipe 3 to collect the powder raw material into a dust collector such as a bag filter. 5 was pneumatically transported to a storage tank 6 provided with the storage tank 5, and once stored therein, the powder raw material in the storage tank 6 was provided with a load cell 8 and an air vent 9a using a rotary valve 7 below the storage tank 6. It is supplied while being metered to a predetermined amount in the measuring tank 9, and then the opening / closing valves 10 and 10 'at the bottom of the measuring tank 9 are opened,
Valve 1 for the total amount of powder raw material metered into metering tank 9.
Mixing tank 11 with air vent 11b attached through 1a
The method of discharging and throwing in is adopted.
【０００４】しかし、このような空気輸送においては、
作業者が現場指示の圧力計１２を随時観察し、輸送配管
３内の圧力が上昇し始めた場合は、供給槽１下部のロー
タリーバルブ２を停止して粉体原料の供給を一旦中断
し、輸送配管３内をブロアー４のエアーでブローして輸
送配管３内の粉体原料を一掃することによって、輸送配
管３内を通常圧に復旧させている。従って、作業者の判
断が遅れてしまった場合には、粉体原料の輸送配管詰ま
りを生じてしまうという問題があった。また、通常のブ
ロアーの場合、輸送配管内に供給する空気圧と空気量と
を同時に上げることは困難であり、間欠的なブローも不
可能であった。However, in such pneumatic transportation,
When the operator observes the pressure gauge 12 directed at the site at any time, and when the pressure in the transportation pipe 3 starts to rise, the rotary valve 2 below the supply tank 1 is stopped and the supply of the powder raw material is temporarily interrupted. The inside of the transport pipe 3 is restored to normal pressure by blowing the inside of the transport pipe 3 with the air of the blower 4 to wipe out the powder raw material in the transport pipe 3. Therefore, if the operator's judgment is delayed, there is a problem that the transport pipe for the powder raw material is clogged. Further, in the case of a normal blower, it is difficult to increase the air pressure and the air amount to be supplied into the transportation pipe at the same time, and intermittent blow is also impossible.
【０００５】また、上記のような空気輸送においては、
粉体原料の輸送配管での詰まりを考慮して、通常は低密
度空気輸送［固気比（粉体／空気）＝１０ｋｇ／ｋｇ未
満］が用いられている。しかし、このような低密度空気
輸送では、多量の空気を必要とするために輸送配管での
圧力損失が大きくなり、０．８ｋｇ／ｃｍ2を超える加
圧空気を圧送することが可能なブロアーが必要となり、
高価なブロアーを使用せざるを得ない状況にあった。更
に、近年のバルブ類はエアー制御されているために、停
電が発生した場合を想定すると、輸送配管の配合槽側端
部近辺に介装された開閉バルブが停電時に自動的に閉ま
ってしまい、既に輸送配管中を輸送されている粉体原料
の行き場がなくなって、輸送配管内の粉体原料の詰まり
の原因となるので、停電発生時のバルブ類の監視を行う
必要が生じ、粉体原料の輸送過程の省力化や効率化が困
難となっている。In the pneumatic transportation as described above,
In consideration of clogging of the powder material transportation pipe, low-density pneumatic transportation [solid gas ratio (powder / air) = less than 10 kg / kg] is usually used. However, in such low-density pneumatic transportation, since a large amount of air is required, the pressure loss in the transportation piping becomes large, and there is a blower capable of pumping pressurized air exceeding 0.8 kg / cm 2. Required,
I was forced to use an expensive blower. Furthermore, since valves in recent years are air-controlled, assuming a case where a power failure occurs, the open / close valve installed near the end of the blending tank side of the transportation piping automatically closes during a power failure, Since there is nowhere to go for the powder raw material that has already been transported in the transport piping, it may cause clogging of the powder raw material in the transport piping.Therefore, it becomes necessary to monitor the valves when a power failure occurs. It is difficult to save labor and increase efficiency in the transportation process.
【０００６】本発明は上記事情に鑑みなされたもので、
粉体原料を空気輸送する際の停電時或いは輸送配管内の
圧力異常上昇による輸送配管の詰まりを効果的に防止す
ることができ、輸送配管詰まりの原因が解消した後はそ
のまま粉体原料の空気輸送を再開することが可能な粉体
原料の輸送配管詰まりの防止方法を提供することを目的
とする。The present invention has been made in view of the above circumstances,
It is possible to effectively prevent clogging of the transport piping due to power failure during pneumatic transportation of the powder raw material or abnormal pressure rise in the transport piping. It is an object of the present invention to provide a method for preventing the clogging of a transportation pipeline for powder raw materials, which can resume transportation.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記目的を達
成するため、供給槽内の粉体原料を輸送配管を通じて配
合槽に空気輸送する際に、その輸送配管の詰まりを防止
する方法であって、停電を検知する手段及び／又は輸送
配管内の圧力を検出する手段を設け、且つ排出槽を設け
ると共に、上記輸送配管に供給槽と配合槽と排出槽とに
通じる三方バルブを介装し、常時はこの三方バルブによ
り供給槽と配合槽との間を開き、排出槽との連結を遮断
すると共に、上記手段が停電及び／又は輸送配管内の所
定設置値以上の圧力上昇を検知した場合に、輸送配管へ
の空気の供給及び粉体原料の供給を中断し、且つ上記三
方バルブを排出槽側に開いて上記輸送配管内の粉体原料
を排出槽に流入させることを特徴とする粉体原料の輸送
配管詰まり防止方法を提供する。ここで、常時は供給槽
内の粉体原料を減量計算して輸送配管により配合槽に直
接投入すると共に、上記手段が停電及び／又は輸送配管
内の所定設置値以上の圧力上昇を検知した場合に排出槽
へ流入される粉体原料の流入量を計測することが好適で
ある。In order to achieve the above-mentioned object, the present invention provides a method for preventing clogging of a transport pipe when a powder raw material in a supply tank is pneumatically transported to a blending bath through a transport pipe. Therefore, a means for detecting a power failure and / or a means for detecting the pressure in the transportation pipe is provided, and a discharge tank is provided, and a three-way valve communicating with the supply tank, the mixing tank, and the discharge tank is provided in the transportation pipe. However, the three-way valve normally opens the connection between the supply tank and the mixing tank to cut off the connection with the discharge tank, and the above-mentioned means detects a power failure and / or a pressure increase in the transportation pipe above a predetermined installation value. In this case, the supply of air and the supply of the powder raw material to the transport pipe are interrupted, and the three-way valve is opened to the discharge tank side to allow the powder raw material in the transport pipe to flow into the discharge tank. How to prevent clogging of powder raw material transportation piping To provide. Here, when the powder raw material in the supply tank is always calculated to be reduced and directly fed into the mixing tank through the transportation pipe, and the above-mentioned means detects a power failure and / or a pressure increase in the transportation pipe which is equal to or higher than a predetermined installation value. It is preferable to measure the inflow amount of the powder raw material that flows into the discharge tank.
【０００８】また、本発明は、供給槽内の粉体原料を輸
送配管を通じて配合槽に空気輸送する際に、その輸送配
管の詰まりを防止する方法であって、輸送配管にその管
内の圧力を検出する手段を設け、上記手段が輸送配管内
の圧力上昇を検知した場合に、輸送配管内への粉体原料
の供給を中断すると共に、輸送配管に供給される空気量
を増量して輸送配管内の粉体原料を配合槽に圧送するこ
とを特徴とする粉体原料の輸送配管詰まり防止方法を提
供する。Further, the present invention is a method for preventing clogging of the transport pipe when pneumatically transporting the powder raw material in the supply tank to the blending bath through the transport pipe. A means for detecting is provided, and when the above means detects a pressure increase in the transportation pipe, the supply of the powder raw material into the transportation pipe is interrupted, and the amount of air supplied to the transportation pipe is increased to increase the transportation pipe. Provided is a method for preventing clogging of a transport pipe for a powder raw material, which comprises pumping the powder raw material therein to a mixing tank.
【０００９】即ち、本発明によれば、停電検知手段、或
いは輸送配管内の異常圧力検出手段により、停電の発生
や粉体原料が流れにくくなって輸送配管内の圧力が徐々
に上昇したり圧力が上下するのを検知して、輸送中の粉
体原料の輸送配管詰まりが発生するのを予測することが
できる。That is, according to the present invention, due to the power failure detection means or the abnormal pressure detection means in the transportation pipe, a power failure occurs or the powder raw material becomes difficult to flow and the pressure in the transportation pipe gradually increases or the pressure increases. It is possible to predict that the clogging of the transportation pipeline of the powder raw material during transportation will occur by detecting the vertical movement of the powder.
【００１０】そして、常時は三方バルブにより供給槽と
配合槽との間を開き、排出槽との連結を遮断して、布サ
イロ等の供給槽に保管されている粉体原料を配合槽に空
気輸送しているが、上記のような事態が生じた場合に
は、輸送空気への供給及び粉体原料の供給を停止すると
共に、三方バルブを排出槽側に開くことによって、輸送
配管内の加圧された空気が排出槽に逃げるのを利用して
輸送配管内に既に供給されている粉体原料を排出槽に流
入させて、粉体原料の輸送配管詰まりを効果的に防止す
ることができる。また、設備の停電状態が回復し、或い
は輸送配管内の圧力が平常に戻った後は、各バルブを元
の状態に戻すことによって、粉体原料の空気輸送を再開
することができる。The three-way valve normally opens the space between the supply tank and the mixing tank to shut off the connection with the discharge tank, and the powder raw material stored in the supply tank such as a cloth silo is aired into the mixing tank. Although the product is being transported, if the above-mentioned situation occurs, the supply to the transport air and the supply of the powder raw material are stopped, and the three-way valve is opened to the discharge tank side to increase the pressure in the transport pipe. It is possible to effectively prevent clogging of the powder material transport pipe by allowing the compressed raw material to flow into the discharge tank and to flow the powder raw material already supplied in the transport pipe into the discharge tank. . Further, after the power failure state of the equipment is recovered or the pressure in the transportation pipe is returned to normal, the pneumatic transportation of the powder raw material can be restarted by returning each valve to the original state.
【００１１】ここで、供給槽内の粉体原料を減量計算し
て輸送配管により配合槽に直接投入する場合は、輸送途
中に停電が発生したり、輸送配管内の圧力が異常上昇し
て輸送配管の供給槽側端部近傍に介装されたバルブが閉
塞することにより、粉体原料の空気輸送が中断されて
も、排出槽へ流入される粉体原料の流入量を計測するよ
うにしておけば、粉体原料の空気輸送が再開され、その
まま減算排出が続行して減算値が設定値に至った後、更
に上記流入量と同量の粉体原料を再輸送することによっ
て、所定量の粉体原料を配合槽に輸送することができる
ので、バルブの監視が不要となり、粉体原料の輸送過程
の効率化及び省力化を図ることができる。Here, in the case where the powder raw material in the supply tank is calculated for reduction and directly charged into the mixing tank through the transportation pipe, a power failure occurs during transportation or the pressure in the transportation pipe is abnormally increased, and the transportation is carried out. Even if the pneumatic transportation of the powder raw material is interrupted by closing the valve installed near the end of the pipe on the supply tank side, the amount of the powder raw material flowing into the discharge tank can be measured. In this case, the pneumatic transportation of the powder raw material is restarted, and the subtractive discharge continues as it is until the subtracted value reaches the set value. Since the powdered raw material can be transported to the blending tank, it is not necessary to monitor the valve, and the efficiency and labor saving of the transportation process of the powdered raw material can be achieved.
【００１２】従って、本発明は従来の低密度空気輸送
（固気比１０ｋｇ／ｋｇ未満）に採用されると共に、高
密度空気輸送（固気比１０〜１００ｋｇ／ｋｇ）におい
ても有効に採用でき、いずれの方法によって空気輸送さ
れる粉体原料であっても効果的にその詰まりを防止し得
るものであり、特に本発明によれば高密度空気輸送にお
ける詰まりを効果的に防止することができる。Therefore, the present invention can be applied not only to conventional low-density pneumatic transportation (solid-gas ratio of less than 10 kg / kg) but also to high-density pneumatic transportation (solid-gas ratio of 10 to 100 kg / kg). The powder raw material which is pneumatically transported by any method can effectively prevent the clogging, and particularly according to the present invention, the clogging in the high density pneumatic transportation can be effectively prevented.
【００１３】また、粉体原料が輸送配管内を流れにくく
なったりした場合の詰まり防止方法として、輸送配管に
設けられた管内の圧力上昇を検出する手段により、所定
値以上の圧力上昇が発生した場合には粉体原料の詰まり
の可能性を判断し、供給槽からの粉体原料の供給を中断
して輸送配管内にそれ以上の粉体原料が供給されるのを
防ぐと共に、輸送配管に供給される空気量を増量して輸
送配管内で滞留している粉体原料を配合槽に圧送して一
掃することによって、粉体原料の輸送配管詰まりを有効
に防止することができる。Further, as a method for preventing clogging when the powder raw material becomes difficult to flow in the transportation pipe, a pressure increase of a predetermined value or more is generated by means for detecting the pressure increase in the pipe provided in the transportation pipe. In this case, determine the possibility of powder raw material clogging, interrupt the supply of powder raw material from the supply tank to prevent more powder raw material from being supplied to the transport piping, and It is possible to effectively prevent clogging of the powder raw material transportation pipe by increasing the amount of supplied air and pressure-feeding the powder raw material remaining in the transportation pipe to the mixing tank to wipe it out.
【００１４】[0014]
【発明の実施の形態及び実施例】以下、本発明につき図
１を参照して更に説明すると、図１は本発明の実施に用
いる装置の一例を示す。なお、図１において図２と同一
構成部品については同一の参照符号を付し、その説明を
省略する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be further described with reference to FIG. 1, which shows an example of an apparatus used for carrying out the present invention. In FIG. 1, the same components as those in FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted.
【００１５】図１の装置は、粉体原料が保管され、ロー
ドセル１３が設けられていると共に、下部にロータリー
バルブ２が設けられた供給槽１と、粉体原料が輸送さ
れ、ロードセル１４及びバルブ５ａを介してバッグフィ
ルター等の集塵機５が付設された配合槽１１と、一端が
ブロアー、コンプレッサー等の空気輸送装置４と連結さ
れ、他端が配合槽１１と連結され、且つ供給槽１と接続
され、空気輸送装置４からの加圧空気で供給槽１からの
粉体原料を配合槽１１に空気輸送する輸送配管３とを具
備している。上記輸送配管３には、その供給槽１との接
続部より上流側（空気輸送装置４側）に自動開閉バルブ
１５が介装されていると共に、配合槽１１との連結端部
近傍に自動開閉バルブ１６が介装されており、更に、上
記供給槽１との接続部と自動開閉バルブ１６介装位置と
の間に自動三方バルブ１７が介装されている。この自動
三方バルブ１７には、フレキシブルチューブ１８を介し
てロードセル１９付きの排出槽２０が接続されており、
常時は、この自動三方バルブ１７は、供給槽１と配合槽
１１との間を開放していると共に、排出槽２０とは閉塞
状態にあり、供給槽１側及び配合槽１１側と排出槽２０
との連結が遮断されており、後述する異常時に自動三方
バルブ１７が排出槽２０側に開き、輸送配管３の供給槽
１側と配合槽１１側と排出槽２０とが連通し得るように
なっている。In the apparatus shown in FIG. 1, a powder raw material is stored, a load cell 13 is provided, and a supply tank 1 provided with a rotary valve 2 at a lower portion, and the powder raw material is transported to a load cell 14 and a valve. A mixing tank 11 provided with a dust collector 5 such as a bag filter is connected through 5a, one end is connected to an air transportation device 4 such as a blower or a compressor, and the other end is connected to the mixing tank 11 and is connected to the supply tank 1. And a transport pipe 3 for pneumatically transporting the powder raw material from the supply tank 1 to the blending tank 11 with the pressurized air from the air transportation device 4. The transportation pipe 3 is provided with an automatic opening / closing valve 15 on the upstream side (air transportation device 4 side) of the connection portion with the supply tank 1, and is automatically opened / closed in the vicinity of the connecting end portion with the mixing tank 11. A valve 16 is provided, and an automatic three-way valve 17 is provided between the connection portion with the supply tank 1 and the automatic opening / closing valve 16 installation position. A discharge tank 20 with a load cell 19 is connected to the automatic three-way valve 17 via a flexible tube 18,
Normally, this automatic three-way valve 17 is open between the supply tank 1 and the mixing tank 11 and is in a closed state with the discharge tank 20, and the supply tank 1 side and the mixing tank 11 side and the discharge tank 20 are closed.
The automatic three-way valve 17 is opened to the discharge tank 20 side in the event of an abnormality described later so that the supply tank 1 side, the mixing tank 11 side and the discharge tank 20 of the transport pipe 3 can communicate with each other. ing.
【００１６】また、輸送配管３の自動開閉バルブ１６介
装位置より若干上流側には圧力計２１が介装されている
と共に、上記バルブ１６介装位置と圧力計２１介装位置
との間には、自動開閉バルブ２２を介装する加圧空気供
給管２３が連結されており、更にこの加圧空気供給管２
３連結位置と自動開閉バルブ１６介装位置との間はフレ
キシブルチューブ２４により構成されている。なお、配
合槽１１内には図示しない混合・撹拌装置が配設されて
いる。Further, a pressure gauge 21 is provided slightly upstream of the automatic opening / closing valve 16 installation position of the transportation pipe 3, and between the valve 16 installation position and the pressure gauge 21 installation position. Is connected to a pressurized air supply pipe 23 through which an automatic opening / closing valve 22 is inserted.
A flexible tube 24 is provided between the 3rd connection position and the automatic opening / closing valve 16 insertion position. A mixing / stirring device (not shown) is arranged in the mixing tank 11.
【００１７】そして、装置の停電状態及び輸送配管３内
の所定値以上の圧力上昇を検出して自動開閉バルブ１
５，１６，２２、ロータリバルブ２、自動三方バルブ１
７を制御するマイクロプロセッサー（ＣＰＵ）２５が設
置されており、ＣＰＵ２５と各バルブ１５，１６，２
２，２，１７、圧力計２１及び供給槽１、排出槽２０に
設置されたロードセル１３，１９とのデーターのやり取
りをする中継所としてそれぞれ入力ポート・出力ポート
（Ｉ／Ｏポート）２６が接続されている。また、ＣＰＵ
２５には、停電時に備えて自家発電装置２７が接続され
ている。Then, the automatic open / close valve 1 is detected by detecting a power failure state of the apparatus and a pressure increase in the transportation pipe 3 above a predetermined value.
5,16,22, rotary valve 2, automatic three-way valve 1
A microprocessor (CPU) 25 for controlling 7 is installed, and the CPU 25 and each valve 15, 16, 2
Input ports and output ports (I / O ports) 26 are connected as relay stations for exchanging data with the load cells 13 and 19 installed in the pressure tank 21, the pressure gauge 21, the supply tank 1 and the discharge tank 20, respectively. Has been done. Also, CPU
An in-house power generator 27 is connected to 25 in preparation for a power failure.
【００１８】以下に上記の装置により空気輸送される粉
体原料の輸送配管詰まりを防止する方法を説明する。A method for preventing clogging of the transportation pipe of the powder raw material pneumatically transported by the above apparatus will be described below.
【００１９】まず、上記装置は、通常の状態では、空気
輸送装置４と供給槽１との接続部より上流側の自動開閉
バルブ１５及び配合槽１１との連結端部近傍の自動開閉
バルブ１６を開状態、自動三方バルブ１７を排出槽２０
側に閉状態、加圧空気供給管２３に連結する加圧空気供
給装置（図示せず）をＯＦＦ状態、加圧空気供給管２３
に介装された自動開閉バルブ２２を閉状態とし、ブロア
ー４からの加圧空気（０．３〜１０ｍ3／分）を輸送配
管３内に供給すると共に、供給槽１の供給口に備えられ
たロータリバルブ２により供給槽１に保管された粉体原
料を輸送配管３内に供給する。この時、輸送配管３内の
圧力は圧力計２１により逐次測定され、そのデーターは
ＣＰＵ２５に入力されている。なお、輸送配管３内の圧
力は、通常０．２〜１．５ｋｇ／ｃｍ2程度の一定圧で
ある。そして、供給槽１内の粉体原料の減量を供給槽１
に備えられたロードセル１３により測定し、減算開始時
のデーターをＣＰＵ２５に保管すると共に、配合槽１１
内に供給された粉体原料の供給量を配合槽１１に備えら
れたロードセル１４により適宜確認する。このようにし
て配合槽１１に空気輸送された粉体原料は混合・撹拌装
置により、配合槽１１内で撹拌・混合される。First, in a normal state, the above-mentioned device is provided with an automatic opening / closing valve 15 upstream of a connecting portion between the pneumatic transportation device 4 and the supply tank 1 and an automatic opening / closing valve 16 near a connecting end portion with the mixing tank 11. Opened, the automatic three-way valve 17 drain tank 20
Side closed, pressurized air supply device (not shown) connected to the pressurized air supply pipe 23 turned off, pressurized air supply pipe 23
The automatic opening / closing valve 22 installed in the closed state is closed, and pressurized air (0.3 to 10 m 3 / min) from the blower 4 is supplied into the transportation pipe 3 and is provided at the supply port of the supply tank 1. The powder raw material stored in the supply tank 1 is supplied into the transportation pipe 3 by the rotary valve 2. At this time, the pressure inside the transportation pipe 3 is sequentially measured by the pressure gauge 21, and the data is input to the CPU 25. The pressure in the transportation pipe 3 is usually a constant pressure of about 0.2 to 1.5 kg / cm 2 . Then, the amount of the powder raw material in the supply tank 1 is reduced by the supply tank 1.
Measured by the load cell 13 provided in the CPU, the data at the start of the subtraction is stored in the CPU 25, and the mixing tank 11
The supply amount of the powder raw material supplied inside is properly confirmed by the load cell 14 provided in the mixing tank 11. The powder raw material thus pneumatically transported to the mixing tank 11 is stirred and mixed in the mixing tank 11 by the mixing and stirring device.
【００２０】そして、装置の停電や輸送配管３内の圧力
が上記の通常値より０．５〜１ｋｇ／ｃｍ2以上となっ
たことをＣＰＵ２５が判断した場合、供給槽１より上流
側の自動開閉バルブ１５及び配合槽１１との連結端部近
傍の自動開閉バルブ１６が閉状態となり、ロータリバル
ブ２が停止する。それとほぼ同時に、自動三方バルブ１
７が排出槽２０側に開いて輸送配管３の供給槽１側と配
合槽１１側と排出槽２０とが連通することによって、輸
送配管３内の加圧された空気と共に粉体原料が排出槽２
０に流入される。この時に流入量を排出槽２０に備えら
れたロードセル１９により計量し、そのデーターをＣＰ
Ｕ２５に保管する。また、必要に応じて、加圧空気供給
管２３に連結する加圧空気供給装置をＯＮ状態とし、加
圧空気供給管２３に介装された自動開閉バルブ２２を開
状態とすることによって輸送配管３内に強制的に加圧空
気を入れて、輸送配管３内の粉体原料を排出槽２０に流
入させることもできるが、このような判断及び操作は、
ＣＰＵ２５により行ってもよいのは勿論である。なお、
停電時には自家発電装置２７が駆動してＣＰＵ２５への
電気の供給が行われる。When the CPU 25 judges that the power failure of the device or the pressure in the transportation pipe 3 becomes 0.5 to 1 kg / cm 2 or more than the above-mentioned normal value, the automatic opening / closing on the upstream side of the supply tank 1 The automatic opening / closing valve 16 in the vicinity of the connection end of the valve 15 and the mixing tank 11 is closed, and the rotary valve 2 is stopped. Almost at the same time, automatic three-way valve 1
7 opens to the discharge tank 20 side and the supply tank 1 side of the transportation pipe 3 and the mixing tank 11 side communicate with the discharge tank 20, so that the powder raw material is discharged together with the pressurized air in the transportation pipe 3 Two
Flowed to zero. At this time, the inflow amount was measured by the load cell 19 provided in the discharge tank 20, and the data was measured by CP.
Store in U25. In addition, if necessary, the pressurized air supply device connected to the pressurized air supply pipe 23 is turned on, and the automatic opening / closing valve 22 provided in the pressurized air supply pipe 23 is opened so that the transportation pipe It is also possible to forcibly insert pressurized air into the inside of the transport pipe 3 and allow the powder raw material in the transportation pipe 3 to flow into the discharge tank 20, but such judgment and operation are
Of course, it may be performed by the CPU 25. In addition,
At the time of a power failure, the private power generation device 27 is driven to supply electricity to the CPU 25.
【００２１】装置の通電復旧及び輸送配管３内の圧力が
通常状態に復旧したことをＣＰＵ２５が判断した後は、
各バルブを上記の常時の状態に戻して、粉体原料の配合
槽１１への空気輸送を続行する。この時、供給槽１に備
えられたロードセル１３による減算開始時のデーター
は、ＣＰＵ２５に保管されているので、復旧後も供給槽
１に備えられたロードセル１３のデーターをＣＰＵ２５
で管理することにより、供給槽１内の粉体原料の減量を
計測することができる。そして、供給槽１からの減量が
設定値に至ったら、更にＣＰＵ２５に保管されている排
出槽２０への流入量のデーターに従って同量の粉体原料
を配合槽１１に輸送すれば、配合槽１１内に設定量の粉
体原料を投入することができる。After the CPU 25 judges that the power supply to the apparatus is restored and the pressure in the transportation pipe 3 is restored to the normal state,
Each valve is returned to the above-mentioned normal state and the pneumatic transportation of the powder raw material to the mixing tank 11 is continued. At this time, since the data at the start of the subtraction by the load cell 13 provided in the supply tank 1 is stored in the CPU 25, the data of the load cell 13 provided in the supply tank 1 is stored in the CPU 25 even after the restoration.
It is possible to measure the decrease in the amount of the powder raw material in the supply tank 1 by controlling the above. When the amount reduced from the supply tank 1 reaches a set value, the same amount of powder raw material is transported to the mixing tank 11 according to the data of the inflow amount to the discharge tank 20 stored in the CPU 25. A set amount of powder raw material can be charged therein.
【００２２】以上説明したように、上記の粉体原料の輸
送配管詰まり防止方法によれば、作業者が現場指示の圧
力計を監視する必要がなく、また、作業員の判断が遅れ
て粉体原料が輸送配管に詰まってしまうという事態の発
生もない。その上、停電や輸送配管内の圧力異常上昇が
解消した後は、輸送工程を自動的に復旧させることがで
きる。As described above, according to the above-mentioned method for preventing the clogging of the powder raw material transport pipe, the operator does not need to monitor the pressure gauge instructed by the site, and the operator's judgment is delayed and the powder is delayed. There is no possibility that raw materials will be blocked in the transportation piping. In addition, the transportation process can be automatically restored after the power failure or the abnormal pressure rise in the transportation piping is resolved.
【００２３】ここで、本発明において輸送配管詰まりを
防止される粉体原料は、歯磨剤や化粧品クリーム等のペ
ースト状、クリーム状又は粉状製品の原料となるもので
あれば、その種類は特に制限されないが、このような粉
体原料として、例えばリン酸カルシウム、水酸化アルミ
ニウム、無水珪酸等の研磨剤、粘結剤や各種界面活性剤
などを挙げることができる。なお、このような粉体原料
の一度の投入量は製品の配合組成や使用する配合槽の大
きさに依存し、特に制限されるものではないが、通常、
５０〜５０００ｋｇ程度を投入することが可能である。In the present invention, the powder raw material for preventing clogging of the transportation pipe is of a kind especially if it is a raw material for paste, cream or powder product such as dentifrice or cosmetic cream. Although not limited, examples of such powder raw materials include abrasives such as calcium phosphate, aluminum hydroxide, and silicic acid anhydride, binders, and various surfactants. In addition, such a powder raw material once charged depends on the compounding composition of the product and the size of the compounding tank to be used, and is not particularly limited, but usually,
It is possible to add about 50 to 5000 kg.
【００２４】本発明は上記粉体原料を加圧空気によって
供給槽から配合槽に空気輸送する際の輸送配管詰まりを
防止するものであるが、その加圧空気の供給手段として
は、上述したようにブロアー、コンプレッサー等を挙げ
ることができ、これらの装置によって０．５〜５ｋｇ／
ｃｍ2程度の加圧空気を輸送配管内に供給することが好
ましく、通常状態での輸送配管内の圧力は０．２〜１．
５ｋｇ／ｃｍ2程度の一定圧に維持することが好まし
い。また、輸送配管としては公知のものが使用され、こ
のような輸送配管として、例えば口径３０〜２００ｍｍ
程度の鋼管、アルミ管又はステンレス管等を用いること
ができる。The present invention is intended to prevent clogging of the transportation piping when pneumatically transporting the above powder raw material from the supply tank to the blending tank by means of pressurized air. The pressurized air supply means is as described above. Blower, compressor, etc. can be mentioned, and 0.5-5 kg /
It is preferable to supply pressurized air of about 2 cm 2 into the transportation pipe, and the pressure in the transportation pipe in the normal state is 0.2 to 1.
It is preferable to maintain a constant pressure of about 5 kg / cm 2 . Known transportation pipes are used, and examples of such transportation pipes include a diameter of 30 to 200 mm.
A steel pipe, an aluminum pipe, a stainless pipe or the like may be used.
【００２５】本発明は、加圧空気が供給される輸送配管
内の圧力の異常上昇を検出する手段を備えるものである
が、その手段としては、上述したように圧力計により輸
送配管内の圧力を測定し、上記の一定圧より０．５〜２
ｋｇ／ｃｍ2程度の圧力上昇が生じた場合に圧力の異常
上昇を検知すると共に、上記のような設備内のバルブ操
作を制御するマイクロコンピューター等を利用すると好
適である。ここで、０．５ｋｇ／ｃｍ2未満の圧力上昇
は、ブロアー等から供給される空気の圧力変動の範囲で
あり、一方、２ｋｇ／ｃｍ2を超えても制御が行われな
いと輸送配管詰まりが生じてしまう場合がある。なお、
空気輸送の空気流量は、特に制限されるものではない
が、通常、０．３〜１０ｍ3／分程度である。The present invention is provided with means for detecting an abnormal rise in the pressure in the transportation pipe to which the pressurized air is supplied. As the means, the pressure in the transportation pipe is measured by the pressure gauge as described above. 0.5 to 2 from the above constant pressure.
It is preferable to use a microcomputer or the like that detects an abnormal rise in pressure when a pressure rise of about kg / cm 2 occurs and controls the valve operation in the equipment as described above. Here, the pressure increase of less than 0.5 kg / cm 2 is the range of pressure fluctuation of the air supplied from the blower, etc. On the other hand, if the control is not performed even if it exceeds 2 kg / cm 2 , the clogging of the transportation pipe will occur. It may occur. In addition,
The air flow rate for pneumatic transportation is not particularly limited, but is usually about 0.3 to 10 m 3 / min.
【００２６】本発明は、上述したように低密度空気輸送
［固気比（粉体／空気）＝１０ｋｇ／ｋｇ未満］又は高
密度空気輸送［固気比（粉体／空気）＝１０〜１００ｋ
ｇ／ｋｇ］のいずれの方法によって空気輸送される粉体
原料であっても効果的にその詰まりを防止し得るもので
あるが、特に固気比（粉体／空気）＝３０〜７０ｋｇ／
ｋｇの場合に効果的である。In the present invention, as described above, low-density pneumatic transportation [solid-gas ratio (powder / air) = less than 10 kg / kg] or high-density pneumatic transportation [solid-gas ratio (powder / air) = 10 to 100 k].
[g / kg], it is possible to effectively prevent the clogging of the powder raw material which is pneumatically transported. However, the solid-gas ratio (powder / air) = 30 to 70 kg /
Effective in the case of kg.
【００２７】そして、供給槽内の粉体原料を減量計算し
て配合槽に直接投入すると共に、排出槽へ流入される粉
体原料の流入量を計測する場合は、上記のように供給槽
及び排出槽にそれぞれ計測機を設置すると共に、各計測
機と上記のようなマイクロコンピューター等とを接続
し、流入量と同量の粉体原料が配合槽に補充されるよう
に設定すると好適である。When the powder raw material in the supply tank is calculated for weight reduction and directly charged into the mixing tank, and when the inflow amount of the powder raw material flowing into the discharge tank is measured, as described above, It is preferable to install a measuring device in each of the discharge tanks, connect each measuring device to the above-described microcomputer, etc., and set such that the same amount of the powder raw material as the inflow amount is replenished in the mixing tank. .
【００２８】なお、上記装置において、空気輸送装置４
とＣＰＵ２５とを接続し、ＣＰＵ２５が上記と同程度の
圧力上昇を判断した場合に、供給槽１の上流側及び配合
槽２との連結部近傍の自動開閉バルブ１５，１６の開状
態を維持し、供給槽１下部のロータリーバルブ２を停止
し、それと共に空気輸送装置４の出力を上げて輸送配管
３内に供給される空気量を通常の１．５〜３倍程度、好
ましくは２倍程度に増量して、輸送配管３内に徐々に滞
留した粉体原料を配合槽１１内に投入するように設定す
ることによっても、粉体原料の輸送配管詰まりを効果的
に防止することができる。この場合、ブロアーのエアー
ブローを間欠的に行うように設定するとより効果的であ
る。そして、圧力は通常値に戻ったことをＣＰＵ２５が
判断した後は、供給槽１下部のロータリーバルブ２を運
転し、空気輸送装置４からの空気量を通常に戻して粉体
原料の空気輸送を続行する。In the above device, the air transportation device 4
And the CPU 25 are connected to each other, and when the CPU 25 determines that the pressure rise is about the same as the above, the open state of the automatic opening / closing valves 15 and 16 in the vicinity of the connection between the upstream side of the supply tank 1 and the mixing tank 2 is maintained. , The rotary valve 2 at the bottom of the supply tank 1 is stopped, and the output of the air transportation device 4 is increased together therewith, so that the amount of air supplied into the transportation pipe 3 is about 1.5 to 3 times, preferably about 2 times the normal amount. Also, by setting so that the powder raw material gradually accumulated in the transport pipe 3 is charged into the blending tank 11, clogging of the powder raw material transport pipe can be effectively prevented. In this case, it is more effective to set the blower to blow air intermittently. Then, after the CPU 25 determines that the pressure has returned to the normal value, the rotary valve 2 at the lower part of the supply tank 1 is operated to return the amount of air from the air transport device 4 to the normal value and transport the powder raw material by air. continue.
【００２９】[0029]
【発明の効果】本発明の粉体原料の輸送配管詰まり防止
方法によれば、装置の通電状態や輸送配管内の圧力を作
業員が監視することなく、粉体原料が輸送配管に詰まる
という事態を防止することができ、粉体原料の輸送過程
の省力化や効率化を図ることが可能となる。EFFECTS OF THE INVENTION According to the method for preventing the clogging of the transport pipe of the powder raw material of the present invention, the powder raw material is clogged in the transport pipe without the operator monitoring the energization state of the apparatus and the pressure in the transport pipe. This makes it possible to save labor and improve the efficiency of the powder raw material transportation process.
【図１】本発明の粉体原料の輸送配管詰まり防止方法を
実施する装置の一例を示す概略断面図である。FIG. 1 is a schematic cross-sectional view showing an example of an apparatus for carrying out the method for preventing clogging of a powder raw material transport pipe according to the present invention.
【図２】従来の粉体原料の輸送配管詰まり防止方法を実
施する装置の概略断面図である。FIG. 2 is a schematic cross-sectional view of an apparatus for carrying out a conventional method for preventing clogging of a transportation pipeline for powder raw materials.
１ 供給槽 ３ 輸送配管 １１ 配合槽 １７ 三方バルブ ２０ 排出槽 ２１ 圧力計（検出手段） ２５ ＣＰＵ（検出手段） ２６ Ｉ／Ｏポート（検出手段） 1 Supply Tank 3 Transport Pipe 11 Mixing Tank 17 Three-way Valve 20 Discharge Tank 21 Pressure Gauge (Detecting Means) 25 CPU (Detecting Means) 26 I / O Port (Detecting Means)
Claims (3)
配合槽に空気輸送する際に、その輸送配管の詰まりを防
止する方法であって、停電を検知する手段及び／又は輸
送配管内の圧力を検出する手段を設け、且つ排出槽を設
けると共に、上記輸送配管に供給槽と配合槽と排出槽と
に通じる三方バルブを介装し、常時はこの三方バルブに
より供給槽と配合槽との間を開き、排出槽との連結を遮
断すると共に、上記手段が停電及び／又は輸送配管内の
所定設置値以上の圧力上昇を検知した場合に、輸送配管
への空気の供給及び粉体原料の供給を中断し、且つ上記
三方バルブを排出槽側に開いて上記輸送配管内の粉体原
料を排出槽に流入させることを特徴とする粉体原料の輸
送配管詰まり防止方法。1. A method for preventing clogging of a transport pipe when pneumatically transporting the powder raw material in the supply tank to the blending bath through the transport pipe, comprising means for detecting a power failure and / or in the transport pipe. A means for detecting the pressure is provided, and a discharge tank is provided, and a three-way valve communicating with the supply tank, the mixing tank, and the discharge tank is provided in the transportation pipe, and the three-way valve normally connects the supply tank and the mixing tank. When the above means detects a power failure and / or a pressure increase in the transportation pipe above a predetermined installation value, the air supply to the transportation pipe and the powder raw material A method for preventing clogging of a transport pipe for a powder raw material, characterized in that the supply is interrupted and the three-way valve is opened to the discharge tank side to allow the powder raw material in the transport pipe to flow into the discharge tank.
て輸送配管により配合槽に直接投入すると共に、上記手
段が停電及び／又は輸送配管内の所定設置値以上の圧力
上昇を検知した場合に排出槽へ流入される粉体原料の流
入量を計測するようにした請求項１記載の粉体原料の輸
送配管詰まり防止方法。2. Normally, the powder raw material in the supply tank is calculated for weight reduction and directly fed into the mixing tank through the transportation pipe, and the above-mentioned means detects a power failure and / or a pressure increase above a predetermined installation value in the transportation pipe. The method for preventing clogging of a transport pipe of a powder raw material according to claim 1, wherein the amount of the powder raw material flowing into the discharge tank is measured.
配合槽に空気輸送する際に、その輸送配管の詰まりを防
止する方法であって、輸送配管にその管内の圧力を検出
する手段を設け、上記手段が輸送配管内の圧力上昇を検
知した場合に、輸送配管内への粉体原料の供給を中断す
ると共に、輸送配管に供給される空気量を増量して輸送
配管内の粉体原料を配合槽に圧送することを特徴とする
粉体原料の輸送配管詰まり防止方法。3. A method for preventing clogging of a powder feed material in a supply tank through pneumatic transportation to a blending tank through a transportation pipe, which comprises means for detecting the pressure inside the transportation pipe. If the above means detects a pressure increase in the transportation pipe, the supply of the powder raw material into the transportation pipe is interrupted, and the amount of air supplied to the transportation pipe is increased to increase the powder in the transportation pipe. A method for preventing clogging of a transportation pipeline for powder raw materials, which comprises pumping raw materials into a mixing tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29372795A JPH09110164A (en) | 1995-10-16 | 1995-10-16 | Plugging preventing method for transport piping of powder material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29372795A JPH09110164A (en) | 1995-10-16 | 1995-10-16 | Plugging preventing method for transport piping of powder material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09110164A true JPH09110164A (en) | 1997-04-28 |
Family
ID=17798468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29372795A Pending JPH09110164A (en) | 1995-10-16 | 1995-10-16 | Plugging preventing method for transport piping of powder material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09110164A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030041A (en) * | 2014-06-09 | 2014-09-10 | 松桃德康农牧有限公司 | Pneumatic conveying system |
| CN106743679A (en) * | 2016-12-07 | 2017-05-31 | 四川亿欣新材料有限公司 | Powder material induction system |
| WO2018200795A1 (en) | 2017-04-27 | 2018-11-01 | Oerlikon Metco (Us) Inc. | Method for detecting and diagnosing powder flow stability |
| CN116969154A (en) * | 2023-09-22 | 2023-10-31 | 山西富盛镁业有限公司 | Sealing conveying device and method for magnesium powder production |
-
1995
- 1995-10-16 JP JP29372795A patent/JPH09110164A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030041A (en) * | 2014-06-09 | 2014-09-10 | 松桃德康农牧有限公司 | Pneumatic conveying system |
| CN106743679A (en) * | 2016-12-07 | 2017-05-31 | 四川亿欣新材料有限公司 | Powder material induction system |
| CN106743679B (en) * | 2016-12-07 | 2023-10-31 | 四川亿欣新材料有限公司 | Powder material conveying system |
| WO2018200795A1 (en) | 2017-04-27 | 2018-11-01 | Oerlikon Metco (Us) Inc. | Method for detecting and diagnosing powder flow stability |
| JP2020517917A (en) * | 2017-04-27 | 2020-06-18 | エリコン メテコ（ユーエス）インコーポレイテッド | Method for detecting and diagnosing powder flow stability |
| EP3615222A4 (en) * | 2017-04-27 | 2021-01-06 | Oerlikon Metco (US) Inc. | Method for detecting and diagnosing powder flow stability |
| CN116969154A (en) * | 2023-09-22 | 2023-10-31 | 山西富盛镁业有限公司 | Sealing conveying device and method for magnesium powder production |
| CN116969154B (en) * | 2023-09-22 | 2023-12-12 | 山西富盛镁业有限公司 | Sealing conveying device and method for magnesium powder production |
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