JPS6370124A - Method for weighing particulate material - Google Patents
Method for weighing particulate materialInfo
- Publication number
- JPS6370124A JPS6370124A JP21278986A JP21278986A JPS6370124A JP S6370124 A JPS6370124 A JP S6370124A JP 21278986 A JP21278986 A JP 21278986A JP 21278986 A JP21278986 A JP 21278986A JP S6370124 A JPS6370124 A JP S6370124A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- flow rate
- granular material
- amount
- time
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000011236 particulate material Substances 0.000 title abstract 11
- 238000005303 weighing Methods 0.000 title description 4
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 86
- 239000008187 granular material Substances 0.000 claims description 64
- 238000011002 quantification Methods 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims 11
- 238000000638 solvent extraction Methods 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
Landscapes
- Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は粉粒体計量方法に係り、特に粉粒体の大量投入
を行う大型のゲートと少量の投入を行う小型のゲートを
有する装置に好適な粉粒体計量方法に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for weighing powder and granule, and particularly to an apparatus having a large gate for inputting a large amount of powder and a small gate for inputting a small amount. The present invention relates to a suitable method for measuring powder or granular material.
粉粒体を計量する方法の一つとして、ホッパスケール等
、粉粒体受容部に供給された粉粒体の量を測定すること
により、粉粒体の重量を測定する方法がある。One method for weighing powder and granules is to measure the weight of powder and granules by measuring the amount of powder and granules supplied to a powder receiving section using a hopper scale or the like.
この方法を第２図を用いて説明すると、原料貯留ホッパ
１内に貯留しである粉粒体２はロークリフィーダ、流量
調節弁等粉粒体の排出量を調節する手段（以下この部分
を単に「弁」とする）３．４を経てホンパスケール５に
落下する。このホンバスケール５に対してはロードセル
６ａ、６ｂ等の重量測定手段が配置してあり、これらの
手段から出力された重量信号を制御装置６のＡ／Ｄ変換
回路においてデジタル信号に変換し、かつ落下した粉粒
体の重量を測定する。この測定にした重量と予め設定し
ておいた重量とを比較器８において比較し、測定重量が
所定の値となったならば、粉粒体の供給を停止する。こ
のようにして予め設定しておいた重量分の粉粒体を落下
供給（仕切る）させる。この場合、粉粒体の排出を短時
間で行い、効率を向上させるため弁のうち一方のものは
大型の弁３として粉粒体の時間当たりの排出量を大きく
し、かつ他方の弁は小型の弁４として排出量の微調整を
行うようにし、両者を併用することにより効率及び測定
精度共に高くなるようにしている。To explain this method using FIG. 2, the powder and granular material 2 stored in the raw material storage hopper 1 is processed by means (hereinafter referred to as this part) for adjusting the discharge amount of the powder and granular material, such as a row feeder and a flow control valve. It falls to Hompa Scale 5 through 3.4 (simply referred to as "valve"). Weight measuring means such as load cells 6a and 6b are arranged on this Honba scale 5, and the weight signals outputted from these means are converted into digital signals in the A/D conversion circuit of the control device 6, and Measure the weight of the powdered material. This measured weight is compared with a preset weight in a comparator 8, and when the measured weight reaches a predetermined value, the supply of the powder or granular material is stopped. In this way, a predetermined weight of powder and granular material is dropped and supplied (divided). In this case, in order to discharge the powder and granular material in a short time and improve efficiency, one of the valves is a large valve 3 to increase the amount of powder and granular material discharged per hour, and the other valve is a small valve. The valve 4 is used to finely adjust the discharge amount, and by using both in combination, both efficiency and measurement accuracy are increased.
第３図は従来の粉粒体の排出及び測定方法の概略を示す
。FIG. 3 shows an outline of a conventional method for discharging and measuring powder and granular materials.
先ず最初は大型弁３及び小型弁４の両者を開として短時
間に大量の粉粒体１がホッパスケール５内に落下するよ
うにして粉粒体排出効率の向上を図る。このようにして
ホッパスケール５に落下した粉粒体の量が定量ｑＩから
予め設定しておいた定量前設定値Δｑ１を減じた量のｑ
２に達したならば、その時間ｔ、において大型弁３を閉
とする。First, both the large valve 3 and the small valve 4 are opened to allow a large amount of powder 1 to fall into the hopper scale 5 in a short period of time, thereby improving the powder discharge efficiency. The amount of powder and granular material that has fallen into the hopper scale 5 in this way is the amount q obtained by subtracting the pre-quantification setting value Δq1 from the quantitative qI.
2, the large valve 3 is closed at that time t.
しかしながら、この大型弁３を閉としてもこの弁の設置
位置からホッパスケール５に対して落下途中の粉粒体の
重量が更に加わるため、その分の粉粒体の落下が終了す
る時間ｔ２までの間では大型弁３開時と同じ量で粉粒体
は落下する。以後は時間ｔ２以降において小型弁４のみ
開の効果が現れる。次に時間ｔ３において小型弁４を閉
としてホッパスケール５内に落下する量が定’ｆｔ ｑ
ｒになるようにする。この場合小型弁４を閉とするタ
イミングは、弁閉後、落下途中の粉粒体の逍Δｑ２を見
越して設定する。However, even if this large valve 3 is closed, the weight of the powder and granules that are falling from the valve installation position to the hopper scale 5 is further added to the hopper scale 5. In between, the powder and granules fall in the same amount as when large valve 3 is opened. Thereafter, the effect of opening only the small valve 4 appears after time t2. Next, at time t3, the small valve 4 is closed and the amount falling into the hopper scale 5 is constant 'ft q
Make it so that r. In this case, the timing for closing the small valve 4 is set in anticipation of the drop Δq2 of the powder and granules in the process of falling after the valve is closed.
以上に示した従来方法において、小型の弁閉後の落下途
中の粉粒体の量Δｑ２はホ・ツバスケール内粉粒体の重
量表示に基づき、時間ｔ４で小型弁を閉としたり、また
は時間ｔ５に於いて閉とする等何回かの計量を行うこと
によりはじめて設定可能なものであり、その間は粉粒体
の排出量がアンダーシュートしたりオバーシュートした
りするため、計量精度は補償されないことになる。In the conventional method described above, the amount Δq2 of the powder and granular material on the way to fall after the small valve is closed is determined by closing the small valve at time t4 or by closing the small valve at time t4 based on the weight display of the powder and granular material in the scale. This can only be set by performing several measurements, such as closing it at t5, and during that time, the amount of powder discharged will undershoot or overshoot, so the measurement accuracy will not be compensated. It turns out.
また定量前設定値Δｑ１を設定するに当たっては粉粒体
排出効率の向上からは大型弁の閉の時間はできるだけ遅
い方が良いため、この値を小さく設定するのが効果的で
あるが、余り小さく設定すると小型弁による粉粒体排出
の微調整の機会が無くなってしまう。このため定量前設
定値Δｑ１は以上の観点から定めなければならないが、
この値を設定するためにも何回かの粉粒体投入作業を行
わなければならない。In addition, when setting the pre-quantification set value Δq1, it is better to close the large valve as late as possible in order to improve powder discharge efficiency, so it is effective to set this value to a small value. If this setting is made, there will be no opportunity to finely adjust the discharge of powder or granular material using a small valve. Therefore, the pre-quantification set value Δq1 must be determined from the above viewpoint,
In order to set this value, it is necessary to perform the operation of adding powder and granular material several times.
本発明は以上に示した問題点を解決すべく構成した方法
である。The present invention is a method configured to solve the above-mentioned problems.
即ち、本発明は最初の粉粒体投入過程において、大型弁
と小型弁の両者が開の時の単位時間当たりの粉粒体流量
、大型弁と小型弁閉後の落下途中の粉粒体量、小型弁の
み開時の単位時間当たりの粉粒体流量、小型弁閉後の落
下途中の粉粒体量をそれぞれ算出し、これに基づき、−
回の粉粒体投入過程で答弁の作動タイミングを学習し、
第二回以後は適正な粉粒体排出を行うように構成した方
法である。That is, the present invention is capable of controlling the flow rate of the powder per unit time when both the large valve and the small valve are open, and the amount of the powder during the fall after the large valve and the small valve are closed, in the initial powder feeding process. , the flow rate of powder and granular material per unit time when only the small valve is open, and the amount of powder and granular material falling on the way after the small valve is closed, respectively, and based on this, -
The timing of the response operation is learned during the powder and granular material feeding process.
From the second time onwards, the method was designed to properly discharge the powder and granules.
本発明は大型弁と小型弁の両者が開の時の単位時間当た
りの粉粒体流量を算出することにより粉粒体排出効率を
考慮して大型弁及び小型弁を閉とする時点の測定値（時
間）を設定し、小型弁のみ開時の単位時間当たりの粉粒
体流量及び小型弁閉後の落下途中の粉粒体量をそれぞれ
算出することによりホ・ツバスケール内に最終的に落下
する量が定量となるための小型弁閉とする時点の測定値
（時間）を設定する。The present invention calculates the powder flow rate per unit time when both the large valve and the small valve are open, and takes into account the powder discharge efficiency, and calculates the measured value at the time when the large valve and the small valve are closed. (time), and calculate the flow rate of powder and granular material per unit time when only the small valve is open, and the amount of powder and granular material falling in the middle of falling after the small valve is closed, and finally fall into the Ho Tsuba scale. Set the measured value (time) at which the small valve is closed so that the amount to be measured becomes a fixed amount.
以下本発明の実施例を詳細に説明する。 Examples of the present invention will be described in detail below.
第１図及び第２図において、最初の粉粒体の投入に当た
っては、大型弁３及び小型弁４を開として原料貯留ホッ
パ１内の粉粒体２をホッパスケール５に落下供給する。In FIGS. 1 and 2, when first charging the powder or granular material, the large valve 3 and the small valve 4 are opened, and the powder or granular material 2 in the raw material storage hopper 1 is dropped and fed into the hopper scale 5.
この間粉粒体の単位時間当たりの流量（第１図のグラフ
Ｇ１の傾き）を測定する。粉粒体の量が設定値Ｑ、から
定量前設定値ΔＱｌを減じた量のＱ２となる時間Ｔ、と
なったならば、大型弁３、小型弁４ともに閉とする。然
し、両弁３．４を閉とした後、落下途中の粉粒体の重量
ΔＱ、が加わるため時間Ｔ２においてはＱ２にΔＱ２が
加わったＥｌ Ｑｓが表示される。なお図中重量の表示
は一時的に０２に示す如く表示がオーバーするが、これ
は粉粒体の落下による加速度によってロードセル等の重
量測定部に対して一時的に粉粒体重量以上の応力が加わ
るためである。During this time, the flow rate of the powder per unit time (the slope of graph G1 in FIG. 1) is measured. When the amount of powder or granular material becomes Q2, which is the amount Q2 obtained by subtracting the pre-quantification setting value ΔQl from the set value Q, both the large valve 3 and the small valve 4 are closed. However, after both valves 3.4 are closed, the weight ΔQ of the falling powder is added, so at time T2, El Qs, which is Q2 plus ΔQ2, is displayed. In addition, the weight display in the figure temporarily exceeds the display as shown in 02, but this is because the acceleration caused by the falling powder temporarily causes stress greater than the weight of the powder to be applied to the weight measuring part such as a load cell. This is to join.
なお定量前設定値ΔＱ１の値は、全ての弁を閉とした後
、ホッパスケール内に堆積した粉粒体の最終的な量が設
定値Ｑ、以下となりかつ小型弁４による粉粒体の排出（
微調整）の余地がある範囲で自由に設定できるので、何
回か排出を行ってその排出量を設定する必要はない。ま
た大型弁３、小型弁４を閉とした時間Ｔ１以後の粉粒体
落下量は具体的な量として測定できるので、その落下量
を定量前流れ込み量ΔＱ２として設定する。The value of the pre-quantification set value ΔQ1 is such that after all valves are closed, the final amount of powder and granules accumulated in the hopper scale is equal to or less than the set value Q, and the powder and granules are discharged by the small valve 4. (
It can be set freely within a range that allows for fine adjustment (fine adjustment), so there is no need to perform discharge several times and set the discharge amount. Furthermore, since the amount of falling powder after time T1 when the large valve 3 and small valve 4 are closed can be measured as a specific amount, the amount of falling is set as the pre-quantification inflow amount ΔQ2.
次に時間Ｔ３において小型弁４のみを開とし、設定値Ｑ
、から予め設定した落差設定値ΔＱ３を減じた重ＩＱ３
を表示する時間Ｔ４においてこの小型弁４を閉とする。Next, at time T3, only the small valve 4 is opened, and the set value Q
Heavy IQ3, which is obtained by subtracting the preset head value ΔQ3 from ,
This small valve 4 is closed at time T4 when .
小型弁４を閉とした後落下途中の粉粒体の重量ΔＱ４が
加わる。この重量ΔＱ４も具体的な量として測定可能で
ある。この落差設定値ΔＱ３も、前記定量前設定値ΔＱ
、と同様、小型弁４閉後の落下途中の粉粒体量が加わっ
ても設定値ＱＩ以下となる範囲で自由に設定できる。After the small valve 4 is closed, the weight ΔQ4 of the falling powder is added. This weight ΔQ4 can also be measured as a specific amount. This head set value ΔQ3 is also the pre-quantification set value ΔQ.
Similarly to , QI can be set freely within a range that remains below the set value QI even if the amount of powder particles falling in the middle of falling after the small valve 4 is closed is added.
第１回目の粉粒体の投入及び計測により、（１）大型弁
３、小型弁４を開とした際の粉粒体の単位時間当たり流
量、（２）大型弁３、小型弁４を閉とした後の粉粒体追
加量、（３）小型弁４のみ開とした際の粉粒体の単位時
間当たり流量、（４）小型弁４を閉とした後の粉粒体追
加量が判明するので、この量に基づいて第２回目以降の
粉粒体の重量測定を行う。The first injection of powder and granular material and measurement determines (1) the flow rate of the powder per unit time when large valve 3 and small valve 4 are opened, and (2) the flow rate of powder and granular material per unit time when large valve 3 and small valve 4 are closed. (3) the flow rate of the powder/granular material per unit time when only the small valve 4 is open, and (4) the amount of the powder/granular material added after the small valve 4 is closed. Therefore, the second and subsequent weight measurements of the powder and granular material are performed based on this amount.
先ず、大型弁３、小型弁４を開として原料貯留ホッパ１
内の粉粒体２をホッパスケール５に急速に落下させる。First, the large valve 3 and small valve 4 are opened, and the raw material storage hopper 1 is opened.
The powder and granular material 2 inside is rapidly dropped into a hopper scale 5.
次に、定量Ｑ１から定量前設定値ΔＱ、を減じた量のＱ
２となったならば大型弁３のみを閉とする。この場合定
量前設定値は前述の第１回目の測定と同じ値としである
が、もとよりこれに限定するものではなく、既に具体的
な数値が判明している小型弁４のみ開時の粉粒体流量、
小型弁４閉以後の流れ込み量等を勘案し、排出効率が高
くなるよう、つまりΔＱ１を小さく設定することができ
る。この際大型弁３のみを閉とすることによりＴ ：＋
Ｔ ＋つるり大型弁３、小型弁４ともに停止してい
る時間を０とし、粉粒体の排出効率を向上させる。Next, Q is the amount obtained by subtracting the pre-quantification set value ΔQ from the quantitative Q1.
2, only the large valve 3 is closed. In this case, the pre-quantification setting value is the same value as the first measurement described above, but it is not limited to this, and only the small valve 4 whose specific value is already known is the powder particle size when open. body flow,
Taking into account the amount of inflow after the small valve 4 is closed, etc., it is possible to set ΔQ1 small so that the discharge efficiency is high, that is, ΔQ1 is set small. At this time, by closing only the large valve 3, T:+
T + The time during which both the large and small valve 4 are stopped is set to 0 to improve the discharge efficiency of powder and granular material.
大型弁３を例えば時間Ｔ、においで閉とした後、小型弁
４のみ開として粉粒体排出の微調整を行うが、この場合
、小型弁４のみを開とした後の弁閉後の流れ込み量ΔＱ
４は具体的に判明しているので、小型弁４は設定量”ｔ
Ｑｓからこの流れ込み量ΔＱ４を減じた重量のＱ４と
なった時点Ｔ６で閉とする。大型弁３と小型弁４の両方
が同時に閉となっている時間がＯとなるので、この時間
Ｔ６は前記第１回目の計量の際の時間Ｔ４よりも短くな
り、−回当たりの粉粒体排出時間を短縮することができ
る。この操作により、ホッパスケール５に流入する粉粒
体は小型弁４閉後の粉粒体流れ込み量も含めて設定量の
Ｑ、となる。つまり、定量前設定値ΔＱＩは大型弁３と
小型弁４を閉とした後の流れ込み量ΔＱ２と小型弁４を
閉とした後の流れ込み量ΔＱ、の合計の値に更に小型弁
４のみ開時の流量ΔＱ、を加えた値の範囲で適宜設定す
れば良い。After the large valve 3 is closed for a time T, for example, only the small valve 4 is opened to finely adjust the discharge of powder and granules. In this case, the inflow after the valve is closed after only the small valve 4 is opened Quantity ΔQ
4 is specifically known, so the small valve 4 has the set amount "t"
It is closed at time T6 when the weight reaches Q4, which is obtained by subtracting this inflow amount ΔQ4 from Qs. Since the time during which both the large valve 3 and the small valve 4 are closed at the same time is O, this time T6 is shorter than the time T4 during the first weighing, and the powder/granular material per - Discharging time can be shortened. By this operation, the powder and granular material flowing into the hopper scale 5 becomes the set amount Q, including the amount of powder and granular material flowing in after the small valve 4 is closed. In other words, the pre-quantification set value ΔQI is the sum of the inflow amount ΔQ2 after large valve 3 and small valve 4 are closed, and the inflow amount ΔQ after small valve 4 is closed, plus the value when only small valve 4 is open. The flow rate ΔQ may be appropriately set within the range of the sum of the flow rate ΔQ.
つまり
ΔＱ、＝ΔＱ２＋ΔＱ４＋ΔＱ５
であり、かつ大型弁３と小型弁４の排出量を特定すれば
ΔＱ２とΔＱ、は特定されるから、結局ΔＱｌはΔＱ、
の大小、つまり小型弁４開の時間の設定により定まる。In other words, ΔQ, = ΔQ2 + ΔQ4 + ΔQ5, and if the discharge amounts of large valve 3 and small valve 4 are specified, ΔQ2 and ΔQ can be specified, so ΔQl is ΔQ,
It is determined by the magnitude of , that is, the setting of the time when the small valve 4 is open.
本発明は以上具体的に説明したように、第１回目の粉粒
体投入過程において、大型弁等の大型流量調節機構と小
型弁等の小型流量調節機構の両者が開の時の単位時間当
たりの粉粒体流量、小型流量調節機構のみ開時の単位時
間当たりの粉粒体流量、小型流量調節機構閉後の落下途
中の粉粒体量をそれぞれ算出し、これに基づき、−回の
粉粒体投入過程で各流量調節機構の作動タイミングを学
習するので、−回の粉粒体排出過程を終了することによ
り、制御に必要なデータを得ることが可能であり、第二
回以後では適正な粉粒体排出を行うことが可能となる。As specifically explained above, in the first powder/grain material charging process, the present invention provides a flow rate per unit time when both a large flow rate adjustment mechanism such as a large valve and a small flow rate adjustment mechanism such as a small valve are open. The powder and granule flow rate per unit time when only the small flow rate adjustment mechanism is open, and the amount of powder and granule falling on the way after the small flow rate adjustment mechanism is closed are calculated respectively, and based on this, - times of powder Since the operation timing of each flow rate adjustment mechanism is learned during the granule feeding process, it is possible to obtain the data necessary for control by completing the - time granule discharge process, and from the second time onwards, the data required for control can be obtained properly. This makes it possible to discharge fine powder and granular material.
第１図は第１回目と第２回目以降の粉粒体排出方法を示
すものであって、時間と粉粒体重量との関係を示す線図
、第２図は本発明に係る方法を実施するホッパスケール
の制御系統図、第３図は従来の制御方法を示す時間と粉
粒体重量との関係を示す線図である。
２・・・粉粒体 ３・・・大型弁
４・・・小型弁 ５・・・ホッパスケールΔＱＩ ・
・・定量前設定値
ΔＱ２ ・・・定量前流れ込み量
ΔＱ４ ・・・小型弁閉後の流れ込み世ΔＱ、・・・小
型弁開時の流量
第１図
第２図
第３図Figure 1 shows the method for discharging powder and granules from the first time and the second time onwards, and is a diagram showing the relationship between time and the weight of powder and granules, and Figure 2 shows the method of carrying out the method according to the present invention. FIG. 3 is a diagram illustrating the relationship between time and powder weight in a conventional control method. 2... Powder 3... Large valve 4... Small valve 5... Hopper scale ΔQI ・
...Set value before metering ΔQ2 ...Inflow amount before metering ΔQ4 ...Flow rate after small valve is closed ΔQ, ...Flow rate when small valve is open Fig. 1 Fig. 2 Fig. 3
Claims (1)
粉粒体を荷重測定機構を有する粉粒体受容部に供給する
ことにより粉粒体を予め定めた重量に仕切る方法におい
て、第１回の粉粒体供給過程で、大型の流量調節手段と
小型の流量調節手段の合計した粉粒体流量の単位時間当
たり流量、大型の流量調節手段及び小型の流量調節手段
を閉とした後の粉粒体流れ込み量、小型の流量調節手段
のみの単位時間当たり粉粒体流量、小型の流量調節手段
を閉とした後の粉粒体流れ込み量を各々測定し、これら
測定結果に基づいて、第２回目以降の粉粒体排出に当た
っては、先ず大型の流量調節手段と小型の流量調節手段
を開とし、前記大型の流量調節手段及び小型の流量調節
手段を閉とした後の粉粒体流れ込み量、小型の流量調節
手段を閉とした後の粉粒体流れ込み量の合計に対し小型
の流量調節手段のみの粉粒体流量を加えた量を定量前設
定値とし、粉粒体測定量が定量値からこの定量前設定値
を減じた値となった時点で大型の流量調節手段を閉とて
小型の流量調節手段のみを開とし、粉粒体の重量が設定
値から小型の流量調節手段を閉とした後の粉粒体流れ込
み量を減じた値となった時点でこの小型の流量調節手段
を閉とすることを特徴とする粉粒体計量方法。In a method of partitioning a powder or granule into predetermined weights by supplying the powder or granule to a powder or granule receiving part having a load measuring mechanism via a plurality of flow rate regulating means of different sizes and sizes, the first method includes: In the powder and granular material supply process, the total flow rate of the powder and granular material per unit time of the large flow rate regulating means and the small flow regulating means, after the large flow regulating means and the small flow regulating means are closed. The inflow amount of powder and granular material, the flow rate of powder and granular material per unit time using only the small flow rate regulating means, and the amount of powder and granular material flowing in after closing the small flow rate regulating means, respectively, and based on these measurement results, When discharging powder and granular material from the second time onward, first open the large flow rate regulating means and the small flow rate regulating means, and then adjust the amount of powder and granular material flowing after closing the large and small flow regulating means. , the pre-quantification set value is the sum of the powder and granule flow rate of only the small flow rate control means to the total amount of powder and granule flowing in after the small flow rate control means are closed, and the measured amount of powder and granule is quantified. When the value reaches the value obtained by subtracting this pre-quantification setting value from the pre-quantification setting value, the large flow rate adjustment means is closed and only the small flow rate adjustment means is opened. A method for measuring powder or granular material, characterized in that the small flow rate regulating means is closed when the flow rate reaches a value that is a reduction of the amount of powder or granular material flowing in after closing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21278986A JPS6370124A (en) | 1986-09-11 | 1986-09-11 | Method for weighing particulate material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21278986A JPS6370124A (en) | 1986-09-11 | 1986-09-11 | Method for weighing particulate material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6370124A true JPS6370124A (en) | 1988-03-30 |
Family
ID=16628408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21278986A Pending JPS6370124A (en) | 1986-09-11 | 1986-09-11 | Method for weighing particulate material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6370124A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007047000A (en) * | 2005-08-09 | 2007-02-22 | Matsui Mfg Co | Method for weighing powdery and granular substance |
| JP2010107472A (en) * | 2008-10-31 | 2010-05-13 | Kawata Mfg Co Ltd | Device and method for feeding fixed quantity of powder and granular material |
| CN109520599A (en) * | 2018-10-19 | 2019-03-26 | 东营职业学院 | A kind of electric automatization control device |
-
1986
- 1986-09-11 JP JP21278986A patent/JPS6370124A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007047000A (en) * | 2005-08-09 | 2007-02-22 | Matsui Mfg Co | Method for weighing powdery and granular substance |
| JP2010107472A (en) * | 2008-10-31 | 2010-05-13 | Kawata Mfg Co Ltd | Device and method for feeding fixed quantity of powder and granular material |
| CN109520599A (en) * | 2018-10-19 | 2019-03-26 | 东营职业学院 | A kind of electric automatization control device |
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