JP2545751Y2 - Air-blast equipment - Google Patents
Air-blast equipmentInfo
- Publication number
- JP2545751Y2 JP2545751Y2 JP3676792U JP3676792U JP2545751Y2 JP 2545751 Y2 JP2545751 Y2 JP 2545751Y2 JP 3676792 U JP3676792 U JP 3676792U JP 3676792 U JP3676792 U JP 3676792U JP 2545751 Y2 JP2545751 Y2 JP 2545751Y2
- Authority
- JP
- Japan
- Prior art keywords
- blast material
- blast
- air
- conduit
- 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.)
- Expired - Lifetime
Links
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Measuring Volume Flow (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、投射材流量調整装置を
備えたエア−ブラスト装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air blast device having a blast material flow control device.
【０００２】[0002]
【従来技術と問題点】従来、正確な量のショット処理の
ため、投射材タンクの下に、電磁力を利用したセンサ−
により投射材流量を調整する電動ダンパ−を備えたエア
−ブラスト装置は公知である（特開昭54-111194号公
報）。しかし上記センサ−は、ミキシングチャンバ−で
エア−と投射材が混合された下流に位置していたため、
センサ−の検出位置における投射材の見かけ上の比重は
低いものであった。従って、センサ−で得られる電気的
信号が微弱でありノイズや外乱に弱いため、電動ダンパ
−の制御が困難であり、その結果、投射材の噴出量は正
確に制御できなかった。2. Description of the Related Art Conventionally, a sensor using an electromagnetic force below a blast material tank for an accurate shot processing.
An air-blasting device provided with an electric damper for adjusting the flow rate of a blast material according to Japanese Patent Application Laid-Open No. 54-111194 is known. However, since the sensor was located downstream of the mixing chamber where the air and the blast material were mixed,
The apparent specific gravity of the blast material at the detection position of the sensor was low. Therefore, it is difficult to control the electric damper because the electric signal obtained by the sensor is weak and is susceptible to noise and disturbance. As a result, the ejection amount of the blast material cannot be accurately controlled.
【０００３】この改善策として、センサ−をミキシング
チャンバ−より上流に配置し、圧縮空気と投射材を混合
する前での、投射材の密度の高いところで検出すれば、
ノイズや外乱に強い信号が得られ、電動ダンパ−の制御
は容易になる。しかし、この方法でも、投射材の噴射圧
力（エア−配管に供給される圧縮エア−の圧力）を変化
させた場合、投射タンクから流れ出る投射材の量とスピ
−ドが変化するため、電磁力を利用したセンサ−では、
投射材の噴射量は正確に制御できない。すなわち、電磁
力を利用したセンサ−は、単位時間当たりの投射材の密
度を測定し、投射材のスピ−ドを測定できないため、た
とえば、投射材のスピ−ドが速くなると、同一投射量で
も単位時間当たりの投射材の密度が薄くなり、実際の噴
射量よりも少なめに計測し、この計測値に従って流量を
多くするように調整するため、実際は目標値よりも多め
に噴射することになり、正確な投射材の制御ができな
い。本考案は、上記の問題に鑑みて成されたもので、使
用する圧縮エア−の圧力が変化しても投射材の供給量を
正確に制御できるエヤーブラスト装置を提供することを
目的とするものである。As a remedy, if a sensor is arranged upstream of the mixing chamber, and it is detected at a high density of the blast material before mixing the compressed air and the blast material,
A signal strong against noise and disturbance is obtained, and control of the electric damper becomes easy. However, even in this method, when the injection pressure of the blast material (the pressure of the compressed air supplied to the air piping) is changed, the amount and speed of the blast material flowing out of the blast tank change, so that the electromagnetic force is changed. In sensors using
The amount of shot material cannot be controlled accurately. That is, since the sensor using the electromagnetic force measures the density of the blast material per unit time and cannot measure the speed of the blast material, for example, if the speed of the blast material increases, even if the projection amount is the same, The density of the blast material per unit time becomes thinner, it is measured less than the actual injection amount, and it is adjusted to increase the flow rate according to this measured value, so in fact, it will be injected more than the target value, Inability to control projectiles accurately. The present invention has been made in view of the above problems, and has as its object to provide an air blast device capable of accurately controlling the supply amount of a blast material even if the pressure of compressed air used changes. It is.
【０００４】[0004]
【問題解決のための手段】上記の目的を達成するために
本考案におけるエア−ブラスト装置は、先端にブラスト
ノズルを設けたエア−配管と、該エア−配管の上方に配
設された投射材タンクとを投射材導管およびミキシング
チャンバ−を介して連通するとともに、該投射材導管に
投射材流量調整ゲ−トを設け、かつ該エア−配管におけ
るミキシングチャンバ−よりも上流位置と前記投射材タ
ンクの上部位置とをエア−分岐管を介して連通したエア
−ブラスト装置において、前記投射材導管における投射
材流量調整ゲ−トの下流位置に投射材流量検出センサ−
を配設し、かつ、該投射材導管における投射材検出セン
サ−の下流位置と、前記エア−分岐管とを連通管を介し
て連通したことを特徴とするものである。In order to achieve the above object, an air-blasting device according to the present invention comprises an air-pipe provided with a blast nozzle at a tip thereof, and a projectile disposed above the air-pipe. A blast material conduit and a mixing chamber; a blast material flow control gate provided in the blast material conduit; and a position upstream of the mixing chamber in the air pipe and the blast material tank. In the air-blasting device, which communicates with the upper position of the blast material via an air-branch pipe, a blast material flow detecting sensor is provided at a position downstream of the blast material flow adjustment gate in the blast material conduit.
And a downstream position of the blasting material detection sensor in the blasting material conduit and the air-branch pipe are communicated via a communication pipe.
【０００５】[0005]
【作用】本考案は上記のような解決手段を採用すること
により、エア−配管に供給される圧縮エア−は、投射材
導管にも供給されるため、供給エア−の圧力が変えられ
ても投射材タンクとエア−配管までの差圧を一定に保持
するようになり投射材流量ゲ−ト通る投射材のスピ−ド
を一定にする。According to the present invention, since the compressed air supplied to the air pipe is also supplied to the blast material conduit by employing the above-mentioned solution, even if the pressure of the supplied air is changed. The differential pressure between the blast material tank and the air pipe is kept constant, and the speed of the blast material passing through the blast material flow rate gate is made constant.
【０００６】[0006]
【実施例】図１は、本考案装置の１実施例の概略構成断
面図である。図１において、基端側に図示されない圧縮
空気源に連通され、先端にブラストノズル１を連通して
取り付けたエア−配管２が設けられている。該エア−配
管２の上方には投射材タンク３が配設されていて、該投
射材タンク３は投射材導管４およびミキシングチャンバ
−５を介して前記エア−配管２に連通されている。該投
射材導管４には上流側から投射材流量調整ゲ−ト６およ
び投射材流量検出センサ−７が順次下流に向かって設け
られている。また、前記エア−配管２におけるミィシン
グチャンバ−５の上流位置と前記投射材タンク３の上部
位置とはエア−分岐管８を介して連通されている。該エ
ア−分岐管８は前記投射材導管４における投射材検出セ
ンサ−７の下流位置に連通管９を介して連通されてい
る。FIG. 1 is a schematic sectional view of an embodiment of the present invention. In FIG. 1, an air pipe 2 is provided on the base end side, which is connected to a compressed air source (not shown), and has a blast nozzle 1 connected to and attached to the tip end. A projectile tank 3 is disposed above the air pipe 2, and the projectile tank 3 is connected to the air pipe 2 via a projectile conduit 4 and a mixing chamber 5. The blasting material conduit 4 is provided with a blasting material flow rate adjustment gate 6 and a blasting material flow rate detection sensor 7 sequentially from the upstream side toward the downstream side. An upstream position of the mixing chamber 5 in the air pipe 2 and an upper position of the blast material tank 3 are communicated via an air branch pipe 8. The air branch pipe 8 is connected to a position downstream of the blast material detection sensor 7 in the blast material conduit 4 through a communication pipe 9.
【０００７】以上のような構成において、通常エア−配
管２に圧縮エア−が供給されると圧縮エア−はミキシン
グチャンバ−５を通ってブラストノズル１から噴射され
る流れと、分岐管８を通って投射材タンク３および投射
材導管４における投射材流量検出センサ−７の下流位置
に導入される流れが作られる。この状態で投射材流量調
整ゲ−ト６が開かれると、投射材タンク３の中の投射材
１０が分岐管８から導入されている圧縮エア−の圧力を
受けて流下し、ミキシングチャンバ−５に入る。該ミキ
シングチャンバ−では、該投射材１０が圧縮エア−と混
合されてエア−配管２を左方向に移送されてブラストノ
ズル１から圧縮エア−とともに噴射される。この時、投
射材タンク３と投射材導管４の差圧は、同じ圧縮エア−
が流れているから、投射材導管４内の損失圧力のみで決
まる値となる。したがって、圧縮圧力が一定ならば、上
記差圧は一定である。ここで投射材１０の噴射圧力を急
に大きくすると、ミキシングチャンバ−５を通って、ブ
ラストノズル１から噴射される流れと、分岐管８を通っ
て投射材タンク３および投射材導管４における投射材流
量検出センサ−７の下流位置の流れの両方に、噴射圧力
の高くした圧縮エア−が流入する。したがって、投射材
タンク３と投射材導管４の差圧は、同じ圧縮エア−が流
れているから、変化がなく、一定である。この結果、投
射材タンク３から連通管９が連結されている投射材導管
４の間では、投射材１０は一定速度で落下する。一方、
投射材１０の噴射圧力を急に小さくした場合、投射材タ
ンク３および投射材導管４には、エア−分岐管８および
連通管９を介して低圧の圧縮エア−が流入する。したが
って圧力を増加した場合と同様に、投射材タンク３と投
射材導管４の差圧は一定になり、投射材タンク３から連
通管９が連結されている投射材導管４の間では、投射材
１０は一定速度で落下する。以上のように、投射材の噴
射圧力の変化に対して、投射材タンク３と投射材導管４
までの差圧が一定になるため、センサ−検出時の投射材
のスピ−ドは変化しない。この結果、センサ−検出時の
投射材密度は常に一定になる。In the above configuration, when compressed air is supplied to the normal air pipe 2, the compressed air flows through the mixing chamber 5, is injected from the blast nozzle 1, and passes through the branch pipe 8. Thus, a flow is created in the blast material tank 3 and the blast material conduit 4 at a position downstream of the blast material flow detection sensor 7. In this state, when the blast material flow control gate 6 is opened, the blast material 10 in the blast material tank 3 flows down under the pressure of the compressed air introduced from the branch pipe 8, and the mixing chamber -5. to go into. In the mixing chamber, the blast material 10 is mixed with the compressed air, transferred to the left through the air pipe 2, and injected from the blast nozzle 1 together with the compressed air. At this time, the pressure difference between the blast material tank 3 and the blast material conduit 4 is the same as the compressed air pressure.
Flows, the value is determined only by the loss pressure in the blast material conduit 4. Therefore, if the compression pressure is constant, the differential pressure is constant. Here, when the injection pressure of the blast material 10 is suddenly increased, the flow blasted from the blast nozzle 1 through the mixing chamber 5 and the blast material in the blast material tank 3 and the blast material conduit 4 through the branch pipe 8 Compressed air with a high injection pressure flows into both flows downstream of the flow rate detection sensor 7. Therefore, the differential pressure between the blast material tank 3 and the blast material conduit 4 is constant without change because the same compressed air flows. As a result, the blast material 10 falls at a constant speed between the blast material tank 3 and the blast material conduit 4 to which the communication pipe 9 is connected. on the other hand,
When the injection pressure of the blast material 10 is suddenly reduced, low-pressure compressed air flows into the blast material tank 3 and the blast material conduit 4 via the air branch pipe 8 and the communication pipe 9. Therefore, similarly to the case where the pressure is increased, the pressure difference between the blast material tank 3 and the blast material conduit 4 becomes constant, and the blast material between the blast material tank 3 and the blast material conduit 4 to which the communication pipe 9 is connected. 10 falls at a constant speed. As described above, in response to the change in the injection pressure of the blast material, the blast material tank 3 and the blast material conduit 4
, The speed of the shot material at the time of sensor detection does not change. As a result, the blast material density at the time of sensor detection is always constant.
【０００８】[0008]
【考案の効果】本考案は、投射材流量検出センサ−をミ
キシングチャンバ−の上流に配置し、圧縮エア−と投射
材をミキシンングする手前で投射材の流量を検出するよ
うにしたから、投射材の密度の濃いところででの検出が
可能であり、ノイズや外乱に強い信号が得られ、投射材
流量調整ゲ−トの制御が容易になる。さらに、投射材流
量検出センサ−とミキシングチャンバ−の間に連通管を
構成し、投射材の噴射圧力の変化により生じる投射材タ
ンクとミキシングチャンバ−間の差圧の変化に対して、
連通管を通して空気を補充することにより投射材タンク
と投射材導管までの差圧を一定にすることで、投射材流
量検出センサ−を通る投射材のスピ−ドを一定にするこ
とができるようにしたから、投射材の噴射圧力を変化さ
せて、電磁力を利用したセンサ−を用いても、正確な噴
射量の計測ができ、正確な噴射材の制御ができる。この
結果従来より正確、確実なブラスト処理が行なえ、産業
界に与える効果は著大である。According to the present invention, the projectile material flow rate detection sensor is arranged upstream of the mixing chamber, and the flow rate of the projectile material is detected before mixing the compressed air and the projectile material. Can be detected where the density is high, a signal that is strong against noise and disturbance is obtained, and control of the projection material flow rate adjustment gate becomes easy. Furthermore, a communication pipe is formed between the blast material flow rate detection sensor and the mixing chamber, and a change in the pressure difference between the blast material tank and the mixing chamber caused by a change in the blast pressure of the blast material.
By making the pressure difference between the blast material tank and the blast material conduit constant by replenishing air through the communication pipe, the speed of the blast material passing through the blast material flow rate detection sensor can be made constant. Therefore, even if the injection pressure of the blast material is changed and a sensor using electromagnetic force is used, an accurate injection amount can be measured, and accurate control of the blast material can be performed. As a result, blast processing can be performed more accurately and reliably than before, and the effect on the industrial world is remarkable.
【図１】本考案の実施例を示すエア−ブラスト装置の概
略構成断面図である。FIG. 1 is a schematic cross-sectional view of an air-blast device according to an embodiment of the present invention.
１ ショットノズル ２ エア−配管 ３ 投射材タンク ４ 投射材導管 ５ ミキシングチャンバ− ６ 投射材流量調整ゲ−ト ７ 投射材流量検出センサ− ８ エア−分岐管 ９ 連通管 １０ 投射材 REFERENCE SIGNS LIST 1 shot nozzle 2 air pipe 3 blast material tank 4 blast material conduit 5 mixing chamber 6 blast material flow rate adjustment gate 7 blast material flow rate detection sensor 8 air-branch pipe 9 communication pipe 10 blast material
Claims (1)
管と、該エア−配管の上方に配設された投射材タンクと
を投射材導管およびミキシングチャンバ−を介して連通
するとともに、該投射材導管に投射材流量調整ゲ−トを
設け、かつ該エア−配管におけるミキシングチャンバ−
よりも上流位置と前記投射材タンクの上部位置とをエア
−分岐管を介して連通したエア−ブラスト装置におい
て、前記投射材導管における投射材流量調整ゲ−トの下
流位置に投射材流量検出センサ−を配設し、かつ、該投
射材導管における投射材流量検出センサ−の下流位置
と、前記エア−分岐管とを連通管を介して連通したこと
を特徴とするエア−ブラスト装置。An air pipe provided with a blast nozzle at a tip thereof and a projectile tank disposed above the air pipe communicate with each other through a projectile conduit and a mixing chamber. A blast material flow rate adjustment gate is provided in the conduit, and a mixing chamber in the air pipe is provided.
In an air-blast device in which an upstream position and an upper position of the blast material tank are communicated via an air branch pipe, a blast material flow rate detection sensor is provided at a downstream position of the blast material flow adjustment gate in the blast material conduit. And an air-blasting device, wherein a position downstream of the shot material flow rate detection sensor in the shot material conduit is communicated with the air branch pipe through a communication pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3676792U JP2545751Y2 (en) | 1992-04-30 | 1992-04-30 | Air-blast equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3676792U JP2545751Y2 (en) | 1992-04-30 | 1992-04-30 | Air-blast equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0586467U JPH0586467U (en) | 1993-11-22 |
| JP2545751Y2 true JP2545751Y2 (en) | 1997-08-27 |
Family
ID=12478915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3676792U Expired - Lifetime JP2545751Y2 (en) | 1992-04-30 | 1992-04-30 | Air-blast equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2545751Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10175170A (en) * | 1996-12-13 | 1998-06-30 | Sintokogio Ltd | Air blast device |
| JP2000052253A (en) * | 1998-08-10 | 2000-02-22 | Minoru Yoshida | Blasting device |
| CN101360585A (en) * | 2006-02-23 | 2009-02-04 | 三菱麻铁里亚尔株式会社 | Grinding material feeding device |
| KR101587711B1 (en) * | 2014-04-16 | 2016-01-21 | 경북대학교 산학협력단 | Sand blasting apparatus |
-
1992
- 1992-04-30 JP JP3676792U patent/JP2545751Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0586467U (en) | 1993-11-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |