JPH0256615B2 - - Google Patents
Info
- Publication number
- JPH0256615B2 JPH0256615B2 JP15407281A JP15407281A JPH0256615B2 JP H0256615 B2 JPH0256615 B2 JP H0256615B2 JP 15407281 A JP15407281 A JP 15407281A JP 15407281 A JP15407281 A JP 15407281A JP H0256615 B2 JPH0256615 B2 JP H0256615B2
- Authority
- JP
- Japan
- Prior art keywords
- piping
- powder
- electrode
- electrodes
- hold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000843 powder Substances 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 239000011810 insulating material Substances 0.000 claims 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/74—Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Description
【発明の詳細な説明】
本発明は空気輸送管内の粉体の流量を測定する
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for measuring the flow rate of powder in a pneumatic transport pipe.
静電容量によつて配管内部の単位長さ当りの粉
のホールドアツプを測定し、このホールドアツプ
を粉体速度と乗算することによつて、粉体流量が
測定できる。 The powder flow rate can be measured by measuring the hold up of powder per unit length inside the pipe by capacitance and multiplying this hold up by the powder velocity.
第１図は、従来技術の電極の構造を示すが、こ
の構造でホールドアツプを測定すると、管内の粉
の偏心によつて同じホールドアツプでも指示値が
変動してしまう。つまり２ケの円筒電極の間の静
電容量が粉の存在する位置によつて変わるのであ
る。 FIG. 1 shows the structure of a conventional electrode, but when the hold up is measured with this structure, the indicated value varies due to the eccentricity of the powder in the tube even with the same hold up. In other words, the capacitance between the two cylindrical electrodes changes depending on the position where the powder is present.
本発明は、この欠点を無くすために絶縁管外周
面に設けた２ケの電極の形状を工夫したものであ
る。図１は従来技術の電極の構造を示す。管内を
流れる粉の分布が第２図のように偏つて流れると
電極間の容量が変化する。例えば第２図において
粉の分布がＡの場合とＢの場合とでは、Ａの方が
静電容量が大きく検出される。この欠点を無くす
ために本発明では第３図、又は第４図に示すよう
な電極の構造を利用している。第３図では電極が
絶縁管外周をらせん状に巻かれており、第４図の
ものでは階段状になつている。 In order to eliminate this drawback, the present invention devises the shape of the two electrodes provided on the outer peripheral surface of the insulating tube. FIG. 1 shows the structure of a prior art electrode. If the distribution of powder flowing inside the tube is uneven as shown in Figure 2, the capacitance between the electrodes will change. For example, in FIG. 2, when the powder distribution is A and B, a larger capacitance is detected in A. In order to eliminate this drawback, the present invention utilizes an electrode structure as shown in FIG. 3 or 4. In FIG. 3, the electrode is wound spirally around the outer periphery of the insulating tube, and in FIG. 4, it is wound in a step-like manner.
このような電極を用いれば、管内での粉の分布
の偏りによる影響を無くすことができる。 By using such an electrode, it is possible to eliminate the influence of uneven distribution of powder within the tube.
第１図は従来技術の電極の構造を示す。第３，
４図は本発明による実施態様の１例を示す。第２
図は絶縁管の一断面を示し、Ａ，Ｂは粉の偏りを
モデル的に示したものである。
１……絶縁管、２，２′，２″……電極、Ａ……
粉の偏りの分布、Ｂ……粉の偏りの分布、Ｘ……
電極の中心線。
FIG. 1 shows the structure of a prior art electrode. Third,
Figure 4 shows an example of an embodiment according to the invention. Second
The figure shows a cross section of the insulating tube, and A and B are modeled representations of the unevenness of the powder. 1... Insulating tube, 2, 2', 2''... Electrode, A...
Powder bias distribution, B... Powder bias distribution, X...
center line of the electrode.
Claims (1)
し、前記絶縁物の配管の外周面に密着した２ケの
電極が配管の中心軸に対して対称になるように設
け、この２ケの電極間の静電容量が管内を流れる
粉体のホールドアツプ量によつて変化することを
検出する装置において、前記電極が、らせん状又
は階段状の薄板で構成されるようにしたことを特
長とする静電容量式ホールドアツプ検出装置。1 A part of the piping for air transport is made of an insulating material, and two electrodes closely attached to the outer peripheral surface of the insulating piping are provided symmetrically with respect to the central axis of the piping, and these two electrodes are arranged symmetrically with respect to the central axis of the piping. A device for detecting that the capacitance between electrodes changes depending on the amount of hold-up of powder flowing inside a pipe, characterized in that the electrode is composed of a spiral or stepped thin plate. Capacitive hold-up detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15407281A JPS5855716A (en) | 1981-09-29 | 1981-09-29 | Electrostatic capacity type detector for hold up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15407281A JPS5855716A (en) | 1981-09-29 | 1981-09-29 | Electrostatic capacity type detector for hold up |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5855716A JPS5855716A (en) | 1983-04-02 |
| JPH0256615B2 true JPH0256615B2 (en) | 1990-11-30 |
Family
ID=15576275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15407281A Granted JPS5855716A (en) | 1981-09-29 | 1981-09-29 | Electrostatic capacity type detector for hold up |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5855716A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012025799A (en) * | 2010-07-20 | 2012-02-09 | Electric Power Dev Co Ltd | Coal gasification furnace system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3500223B2 (en) * | 1995-04-04 | 2004-02-23 | 日本パーカライジング株式会社 | Powder flow measuring device |
| JPH08271301A (en) * | 1995-03-30 | 1996-10-18 | Chichibu Onoda Cement Corp | Flow measuring device for powder/grain |
| WO1996030725A1 (en) * | 1995-03-30 | 1996-10-03 | Nihon Parkerizing Co., Ltd. | Device for measuring flow rate of powder, method and device for supplying powder |
| DE10339145A1 (en) * | 2003-08-26 | 2005-03-24 | Kiesl, Michael, Ing.(grad.) | Monitor to determine the fluid flow through a tube, e.g. a powder to an electrostatic coating applicator, has a carrier body around the delivery tube with end electrodes to register electrostatic potential differences |
-
1981
- 1981-09-29 JP JP15407281A patent/JPS5855716A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012025799A (en) * | 2010-07-20 | 2012-02-09 | Electric Power Dev Co Ltd | Coal gasification furnace system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5855716A (en) | 1983-04-02 |
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