JPH0515461Y2 - - Google Patents
Info
- Publication number
- JPH0515461Y2 JPH0515461Y2 JP4330188U JP4330188U JPH0515461Y2 JP H0515461 Y2 JPH0515461 Y2 JP H0515461Y2 JP 4330188 U JP4330188 U JP 4330188U JP 4330188 U JP4330188 U JP 4330188U JP H0515461 Y2 JPH0515461 Y2 JP H0515461Y2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- side plate
- casing
- gap
- powder
- 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 - Lifetime
Links
- 239000000843 powder Substances 0.000 claims description 24
- 239000008187 granular material Substances 0.000 claims description 8
- 238000000638 solvent extraction Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 2
- 238000005056 compaction Methods 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Air Transport Of Granular Materials (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
この考案は、粉粒体の圧送式空気輸送装置にお
いて、粉粒体を輸送管へ供給するためのロータリ
ーフイーダーの改良に関する。[Detailed Description of the Invention] Industrial Application Field This invention relates to an improvement of a rotary feeder for supplying granular material to a transport pipe in a pressure-feeding pneumatic transportation device for granular material.
従来の技術
粉粒体の空気輸送において、ホツパやタンクか
ら輸送管へ定量の粉粒体を送るのにロータリーフ
イーダーが使用されている。この場合には、輸送
管内の圧力を遮断して粉粒体を重力で落下させる
から、エアロツクバルブとしての機能を備えるこ
とが必要である。BACKGROUND ART In pneumatic transportation of powder and granular materials, a rotary leaf feeder is used to send a fixed amount of powder and granular materials from a hopper or a tank to a transport pipe. In this case, the pressure inside the transport pipe is cut off and the powder is allowed to fall by gravity, so it is necessary to have a function as an air valve.
そのため、ロータとケーシングの間のすきまは
小さいほど良いが、ロータの円滑な回転を確保す
るため、一般には0.2mm程度の半径方向のすきま
が設けられる。そして、ロータが側板を有する場
合は、ロータ側板とケーシング側板の間に４mm程
度のかなり大きなすきまが設けられる。 Therefore, the smaller the gap between the rotor and the casing, the better, but in order to ensure smooth rotation of the rotor, a radial gap of about 0.2 mm is generally provided. When the rotor has a side plate, a fairly large gap of about 4 mm is provided between the rotor side plate and the casing side plate.
粉粒体の空気輸送は、一般にロータリーフイー
ダーの上側（供給側で大気圧）と下側（輸送管側
で高圧）では圧力差があるため、ロータが側板を
有する場合は、そのロータ側板とケーシング側板
とのすきまを通して漏れ空気が流れる。この漏れ
空気により運ばれて、すきま内には微粉体が侵入
する。 Pneumatic transport of powder and granular materials generally involves a pressure difference between the upper side (atmospheric pressure on the supply side) and the lower side (high pressure on the transport pipe side) of the rotary feeder, so if the rotor has a side plate, the rotor side plate and Leakage air flows through the gap with the casing side plate. This leaked air carries fine powder into the gap.
一般に、微粉体の粒子径が小さくなると、付着
や凝集が起こりやすくなる。そして、粒子同士が
接近し、これに外力が加わると付着や圧密現象が
起こる。このような圧密現象が起これば閉鎖現象
が起こる。また、この圧密現象はロータリーフイ
ーダーの粉粒体供給側と輸送管側の圧力差が大き
いほど強固となる。 Generally, as the particle size of fine powder becomes smaller, adhesion and aggregation become more likely to occur. When the particles come close to each other and an external force is applied to them, adhesion and compaction phenomena occur. When such a compaction phenomenon occurs, a closure phenomenon occurs. Furthermore, this compaction phenomenon becomes stronger as the pressure difference between the powder supply side and the transport pipe side of the rotary feeder increases.
このような圧密状態が起これば、圧密化された
微粉体と回転しているロータ側板との間の摩擦に
よりロータの温度が上昇し、その結果ロータが膨
張して半径方向のすきまが温度上昇に伴つて小さ
くなり、ロータとケーシングが接触してかじり付
きや焼き付きを起こし回転できなくなる等運転上
支障をきたす。 When such a compaction occurs, the temperature of the rotor increases due to friction between the compacted fine powder and the rotating rotor side plate, which causes the rotor to expand and the radial clearance to rise in temperature. As the rotor and casing come into contact with each other, the rotor and casing may come into contact with each other, resulting in galling or seizure, which can cause operational problems such as the inability to rotate.
この圧密状態を排除する方法として、例えばケ
ーシング側板に気体排出孔を設け、空気と共に侵
入する微細粉を排出する装置（実公昭59−11944
号公報）あるいはすきまの圧力を系内圧力より高
く保つように、すきまに系内圧力より0.2Kg／cm2
Ｇ程度高い圧力空気を吹き込んで微粉のすきまへ
の侵入を防止する装置がある。 As a method to eliminate this compacted state, for example, a device is used to provide a gas discharge hole in the side plate of the casing and discharge the fine powder that enters with the air.
Or, in order to keep the pressure in the gap higher than the system pressure, the gap should be 0.2Kg/cm 2 higher than the system pressure.
There is a device that blows air under pressure as high as G to prevent fine powder from entering the gaps.
考案が解決しようとする課題
上記のケーシング側板に排出孔を設けたロータ
リーフイーダーは、排出された空気と微細粉を処
理するための装置を別個に設ける必要があり、ま
た系外に空気を排出するため結果的に漏れ空気が
増加し、輸送用空気の不足を引き起こし輸送に支
障をきたすことがある。更に、ケーシング側板か
ら圧力空気を吹き込む方法では、別に空気源を必
要とし、運転中に圧力空気の吹き込みが中断した
場合には吹き込み用管内に粉体が侵入し、以後の
運転に支障が起こる。Problems to be solved by the invention The above-mentioned rotary leaf feeder, which has a discharge hole in the side plate of the casing, requires a separate device to treat the discharged air and fine powder, and also exhausts the air outside the system. As a result, leakage air increases, which may lead to a shortage of air for transportation, which may impede transportation. Furthermore, the method of blowing pressurized air from the casing side plate requires a separate air source, and if the blowing of pressurized air is interrupted during operation, powder will enter the blowing pipe, causing problems in subsequent operations.
この考案は、上記のごとく従来の圧密状態防止
手段には多くの問題点があり、これらの欠点を排
除することを目的として、簡単な装置により確実
な効果が得られるロータリーフイーダーを提供す
ることにある。 The purpose of this invention is to provide a rotary leaf feeder that can provide a reliable effect with a simple device, in order to eliminate many problems with conventional compaction prevention means as described above. It is in.
課題を解決するための手段
上記目的を達成するため、この考案の粉粒体空
気輸送用ロータリーフイーダーは、ロータの両端
に仕切用の側板を有するロータリーフイーダーに
おいて、すきまを介して相対向するロータ側板と
ケーシング側板とで形成する空間内の空気を攪拌
するように、ロータ側とケーシング側にピン等の
突起を設けてなる。Means for Solving the Problems In order to achieve the above object, the rotary leaf feeder of this invention for pneumatic transportation of powder and granular materials is provided with a rotary leaf feeder having partitioning side plates at both ends of the rotor, in which the rotary leaf feeder is provided with side plates for partitioning at both ends of the rotor. Protrusions such as pins are provided on the rotor side and the casing side so as to stir the air in the space formed by the rotor side plate and the casing side plate.
上記ピン類の突起は、ロータ側としてはロータ
側板または回転軸のすきまに露出している部分が
あり、ケーシング側としてはケーシング側板があ
る。 On the rotor side, the protrusions of the pins have a portion exposed in a gap between the rotor side plate or the rotating shaft, and on the casing side, there is a casing side plate.
作 用
ロータの回転に伴いロータ側に設けたピン等の
突起が回転すると、その突起の回転軌跡と固定し
ているケーシング側に設けた突起が描く円周との
間に挟まつた部分に空洞ができる。この空洞が存
在することにより、空洞をなくするように粉体が
常に移動し粒子同士が接近して固結するのを防止
できるので、ロータ側板とケーシング側板との間
のすきまに、漏れ空気に伴つて侵入した微粉体は
圧密状態を生じることはない。Function When a protrusion such as a pin provided on the rotor side rotates as the rotor rotates, a cavity is created in the area sandwiched between the rotation locus of the protrusion and the circumference drawn by the protrusion provided on the fixed casing side. can. Due to the existence of this cavity, the powder constantly moves to eliminate the cavity and prevents the particles from coming close to each other and solidifying. The fine powder that enters along with this does not cause a compacted state.
実施例
この考案の一実施例を第１図〜第３図に基づい
て説明する。Embodiment An embodiment of this invention will be described based on FIGS. 1 to 3.
側板３を有するロータ１を組込んだロータリー
フイーダーの上記側板３とケーシング２の側板４
とが相対向する面上に、それぞれピン５，６を植
設する。上記ピン５，６は側板３と側板４とのす
きま８の1/2以上の長さを有し、ピンの上半部を
相対向させることが望ましい。 The side plate 3 of the rotary feeder incorporating the rotor 1 having the side plate 3 and the side plate 4 of the casing 2
Pins 5 and 6 are implanted on the surfaces facing each other. It is desirable that the pins 5 and 6 have a length of at least 1/2 of the gap 8 between the side plates 3 and 4, and that the upper halves of the pins face each other.
上記のごとく構成されたロータリーフイーダー
のロータ１を回転させ、図示しない空気源から輸
送用圧力空気が送入されている輸送管へ上部のポ
ツパ７から粉粒体を定量づつ落下させながら供給
する。 The rotor 1 of the rotary leaf feeder configured as described above is rotated, and powder and granules are dropped and supplied in fixed quantities from the upper part 7 to the transportation pipe into which pressurized air for transportation is fed from an air source (not shown). .
すると、輸送管側からの高圧空気の吹き上げに
より微粉体がすきま８に侵入する。そして、ロー
タ１の側板３に植設されたピン５が回転すること
により、ケーシング側のピン６と協同して、第３
図に示すようにピン５の回転軌跡９とピン６の位
置を通る円周１０との間に空洞１１が形成され
る。更に、すきま８に侵入した微粉体は、その空
洞１１を埋めるように移動し、ロータが回転して
いる限り空洞が生じるので、微粉体は常に攪拌さ
れ粒子同士が接近して固結することはない。その
結果、すきま８内で微粉体が圧密状態になること
はない。 Then, the fine powder enters the gap 8 due to the blowing up of high-pressure air from the transport pipe side. When the pin 5 installed on the side plate 3 of the rotor 1 rotates, the third
As shown in the figure, a cavity 11 is formed between the rotation locus 9 of the pin 5 and the circumference 10 passing through the position of the pin 6. Furthermore, the fine powder that has entered the gap 8 moves to fill the cavity 11, and as long as the rotor rotates, a cavity is created, so the fine powder is constantly stirred and the particles do not come close to each other and solidify. do not have. As a result, the fine powder does not become compacted within the gap 8.
今、すきま内にピンを有しない従来のロータリ
ーフイーダーを使つてポリエチレン粉をホツパ７
に溜め置き、排出量100Kg／Hr、ロータ回転数
20rpm、上の送入側と下の輸送管側との圧力差１
Kg／cm2Ｇ、ケーシング外表面温度20℃の条件で運
転を開始した。そして、２時間30分を経過した後
ケーシング外表面の温度を測定したところ106℃
であつた。この状態で運転を停止し、分解点検し
たところ、すきま８に侵入した微粉体が圧密状態
で摩擦により溶融していた。 Now, using a conventional rotary feeder that does not have pins in the gap, polyethylene powder is hopped into a hopper.
Stored in, discharge amount 100Kg/Hr, rotor rotation speed
20 rpm, pressure difference between upper inlet side and lower transport pipe side 1
Operation was started under conditions of Kg/cm 2 G and casing outer surface temperature of 20°C. After 2 hours and 30 minutes, the temperature of the outer surface of the casing was measured and it was 106℃.
It was hot. When the operation was stopped in this state and the machine was disassembled and inspected, it was found that the fine powder that had entered the gap 8 had melted due to friction in a compacted state.
一方、第２図に示すこの考案の実施によるロー
タリーフイーダーを使つて上記と同一条件で運転
したが、長時間経過後もケーシング外表面の温度
上昇は見られず、支障なく運転することができ
た。 On the other hand, when a rotary leaf feeder according to the present invention shown in Fig. 2 was operated under the same conditions as above, no rise in temperature on the outer surface of the casing was observed even after a long period of time, and the operation could be performed without any problems. Ta.
第４図は他の実施例を示したものであり、ロー
タ側板に設けたピンの代わりに回転軸１２にピン
１３を植設した点が、第２図に示す場合と異な
る。しかし、運転中は、回転するピン１３と固定
したピン６が協同して空洞が形成され、第２図の
場合と同様の作用、効果がもたらされる。 FIG. 4 shows another embodiment, which differs from the case shown in FIG. 2 in that a pin 13 is installed on the rotating shaft 12 instead of the pin provided on the rotor side plate. However, during operation, the rotating pin 13 and the fixed pin 6 cooperate to form a cavity, and the same operation and effect as in the case of FIG. 2 is brought about.
考案の効果
この考案は、ロータ側とケーシング側とのすき
まにピン等の突起を設けるだけの簡単な装置によ
り、すきまに侵入する微粉体が固結して圧密状態
となるのを防止することができ、その結果ロータ
リーフイーダーの回転が確保され、また寿命を増
大できる。Effects of the invention This invention uses a simple device such as a protrusion such as a pin in the gap between the rotor side and the casing side to prevent fine powder that enters the gap from solidifying and forming a compacted state. As a result, rotation of the rotary leaf feeder can be ensured and its life can be increased.
第１図はこの考案の実施によるロータリーフイ
ーダーの断面図、第２図は同上のロータ側板とケ
ーシング側板部分の詳細を示す断面図、第３図は
ロータ側板に植設したピンの回転軌跡とケーシン
グ側板に植設したピンの位置を通る円周を示す説
明図、第４図はこの考案の他の実施例におけるロ
ータ側板とケーシング側板部分の上半部を示す断
面図である。
１……ロータ、２……ケーシング、３，４……
側板、５，６，１３……ピン、７……ホツパ、８
……すきま、９……回転軌跡、１０……円周、１
１……空洞、１２……回転軸。
Fig. 1 is a cross-sectional view of a rotary leaf feeder according to this invention, Fig. 2 is a cross-sectional view showing details of the rotor side plate and casing side plate portion of the same above, and Fig. 3 is a rotation locus of a pin installed in the rotor side plate. An explanatory diagram showing the circumference passing through the position of the pin installed in the casing side plate, and FIG. 4 is a sectional view showing the upper half of the rotor side plate and the casing side plate portion in another embodiment of the invention. 1... Rotor, 2... Casing, 3, 4...
Side plate, 5, 6, 13...Pin, 7...Hopper, 8
...Gap, 9...Rotation locus, 10...Circumference, 1
1...Cavity, 12...Rotation axis.
Claims (1)
ーフイーダーにおいて、すきまを介して相対向す
るロータ側板とケーシング側板とで形成する空間
内の空気を攪拌するように、ロータ側とケーシン
グ側にピン等の突起を設けた粉粒体空気輸送用ロ
ータリーフイーダー。 In a rotary leaf feeder that has partitioning side plates at both ends of the rotor, pins or the like are installed on the rotor side and the casing side to stir the air in the space formed by the rotor side plate and the casing side plate, which face each other with a gap between them. A rotary feeder with protrusions for pneumatic transportation of powder and granular materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4330188U JPH0515461Y2 (en) | 1988-03-30 | 1988-03-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4330188U JPH0515461Y2 (en) | 1988-03-30 | 1988-03-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01147329U JPH01147329U (en) | 1989-10-12 |
| JPH0515461Y2 true JPH0515461Y2 (en) | 1993-04-23 |
Family
ID=31269702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4330188U Expired - Lifetime JPH0515461Y2 (en) | 1988-03-30 | 1988-03-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0515461Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010189107A (en) * | 2009-02-17 | 2010-09-02 | Takuma Co Ltd | Rotary valve |
-
1988
- 1988-03-30 JP JP4330188U patent/JPH0515461Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01147329U (en) | 1989-10-12 |
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