JPH01176475A - Nozzle clogging detection - Google Patents
Nozzle clogging detectionInfo
- Publication number
- JPH01176475A JPH01176475A JP62336094A JP33609487A JPH01176475A JP H01176475 A JPH01176475 A JP H01176475A JP 62336094 A JP62336094 A JP 62336094A JP 33609487 A JP33609487 A JP 33609487A JP H01176475 A JPH01176475 A JP H01176475A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- time
- piston
- nozzle clogging
- measured
- 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
- 238000001514 detection method Methods 0.000 title claims abstract description 13
- 239000012530 fluid Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は、例えば高圧水による切断、剥離、洗浄等に用
いられる高圧水発生ポンプからの高圧水の供給を受ける
ノズルの目詰りを検出する方法に関するものである。Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention relates to a nozzle that receives high pressure water from a high pressure water generation pump used for cutting, stripping, cleaning, etc. with high pressure water. The present invention relates to a method for detecting clogging.
（従来の技術）
特開昭５８−９８１５６号公報に示されるように、ノズ
ルの噴射口の近傍に発生する負圧と大気圧との差を検出
することにより、ノズルの目詰りを検出するものがある
。(Prior art) As shown in Japanese Patent Application Laid-Open No. 58-98156, nozzle clogging is detected by detecting the difference between negative pressure generated near the nozzle injection port and atmospheric pressure. There is.
この従来例は、ノズル噴射口近傍の負圧発生部分から表
示装置まで負圧検出管を設け、この管によって、噴射に
伴い発生する負圧、を表示装置まで引出すようにしてい
る。In this conventional example, a negative pressure detection tube is provided from the negative pressure generating part near the nozzle injection port to the display device, and the negative pressure generated due to the injection is drawn out to the display device through this tube.
（発明が解決しようとする問題点）
しかし、この種のノズルが、洗浄、剥離、切断等におい
て高速で回転される場合は、前記負圧検出管を含む回転
部分が大きくなったり、この管が回転しているノズルに
ついて回るため、回転運動に制約を受けやすい問題があ
る。また、多数のノズルが設けられたノズルヘッドの場
合は、それぞれのノズルに前記負圧検出管を接続する必
要があるが、それは容易なことではない。(Problems to be Solved by the Invention) However, when this type of nozzle is rotated at high speed for cleaning, stripping, cutting, etc., the rotating part including the negative pressure detection tube becomes large, and this tube Since the nozzle follows a rotating nozzle, there is a problem in that rotational movement is easily restricted. Further, in the case of a nozzle head provided with a large number of nozzles, it is necessary to connect the negative pressure detection tube to each nozzle, but this is not easy.
本発明の目的は、ノズル先端部分に負圧検出管等の余分
なものを付加することなく、ノズルの目詰りを検出でき
るノズル詰り検出方法を提供することにある。An object of the present invention is to provide a nozzle clogging detection method that can detect nozzle clogging without adding an extra device such as a negative pressure detection tube to the nozzle tip.
（問題点を解決するための手段）
ピストン往復動形のポンプから高圧流体の供給を受ける
ノズル２０の目詰りを検出する方法において、前記ポン
プのピストン１４．１６が一定のストロークを作動する
のに要する時間を測定し、その測定時間が基準時間より
長くなったときに、ノズル詰りを表示するものである。(Means for Solving the Problem) In a method for detecting clogging of a nozzle 20 that receives high-pressure fluid from a reciprocating piston type pump, the piston 14, 16 of the pump operates a constant stroke. The time required is measured, and when the measured time becomes longer than the reference time, a nozzle clogging is indicated.
（作用）
本発明は、ノズル２０が目詰りすると、このノズルから
の流体吐出流量が減少し、ポンプ９ピストン１４．１も
の作動速度が遅くなり、そのピストンが一定のスドゴ、
−りを移動するのに要する時間が長くなるので、この時
間を測定してノズル詰りを検出する。(Operation) In the present invention, when the nozzle 20 is clogged, the flow rate of fluid discharged from this nozzle decreases, and the operating speed of the pump 9 piston 14.
Since it takes a long time to move through the nozzle, this time is measured to detect nozzle clogging.
（実施例）
以下、本発明を図面に示される実施例を参照して詳細に
説明する。(Examples) Hereinafter, the present invention will be described in detail with reference to examples shown in the drawings.
図に示された超高圧水発生ポンプは、−次側圧力室１１
と二次側圧力’［１２との間に中間室１３が形成され、
そして、−次側圧力室１１に嵌合された一次側ビス［・
ン１４が切換弁１５によって方向制御される比較的低圧
の油圧によって往復動されると、二次側圧力室１２で二
次側ピストン１６が進退され、−側の二次側圧力室１２
に吸込側逆止弁１７を経て水が吸込まれるとともに、他
側の二次側圧力室１２から吐出側逆上弁１８を経て吐出
側管路１９に超高圧水が吐出される。この吐出側管路１
９には高圧水を噴射するノズル２０が接続されている。The ultra-high pressure water generation pump shown in the figure has a negative side pressure chamber 11.
An intermediate chamber 13 is formed between and the secondary pressure '[12,
Then, the primary side screw [・
When the piston 14 is reciprocated by relatively low pressure hydraulic pressure whose direction is controlled by the switching valve 15, the secondary piston 16 is moved back and forth in the secondary pressure chamber 12, and the − side secondary pressure chamber 12 is moved back and forth.
At the same time, water is sucked in through the suction side check valve 17, and ultra-high pressure water is discharged from the secondary side pressure chamber 12 on the other side to the discharge side conduit 19 through the discharge side reverse valve 18. This discharge side pipe line 1
9 is connected to a nozzle 20 that sprays high-pressure water.
左右両側の中間室１３には、中間ピストン２１が嵌合さ
れ、さらに二次側圧力室１２から高圧シールを経てこの
中間室１３に漏出した水を外部にドレンする穴２２が設
けられている。さらに、この左右の中間室１３の側壁に
は、中間ピストン２１と対向するセンサ（近接スイッチ
等） ２３．２４が設けられ、この左右のセンサ２３．
２４によってピストン１４．１６゜２１の左右ストロー
クエンドが感知される。An intermediate piston 21 is fitted into the left and right intermediate chambers 13, and a hole 22 is provided for draining water leaking from the secondary pressure chamber 12 into the intermediate chamber 13 through the high pressure seal to the outside. Furthermore, sensors (proximity switches, etc.) 23.24 facing the intermediate piston 21 are provided on the side walls of the left and right intermediate chambers 13, and these left and right sensors 23.
24 senses the left and right stroke ends of the piston 14.16°21.
前記両側のセンサ２３．２４から取出されたピストン感
知信号は制御器２５に送られる。この制御器２５は、一
方のセンサ２３のピストン感知によって前記切換弁１５
のソレノイドに増幅された駆動電流を出力オンして、こ
の切換弁１５を切換作動し、また、他方のセンサ２４の
ピストン感知によって前記切換弁１５のソレノイドに対
する駆動電流をオフにして、スプリングリターン形の切
換弁１５を図示された状態に自動復帰させる。この制御
器２５の切換弁制御により、ピストン１４の左右両側の
一次側圧力室１１に比較的低圧の駆動液が交互に給排さ
れ、−次側ピストン１４およびこれと一体の二次側ピス
トン１６が繰返し往復動される。Piston sensing signals taken from the sensors 23, 24 on both sides are sent to the controller 25. This controller 25 controls the switching valve 15 by sensing the piston of one sensor 23.
The amplified drive current is outputted to the solenoid to switch the switching valve 15, and the drive current to the solenoid of the switching valve 15 is turned off by the piston detection of the other sensor 24, and the spring return type is switched on. The switching valve 15 is automatically returned to the illustrated state. By controlling the switching valve of the controller 25, relatively low pressure driving fluid is alternately supplied and discharged to the primary pressure chambers 11 on both the left and right sides of the piston 14, and the driving fluid is alternately supplied and discharged to the primary pressure chambers 11 on both the left and right sides of the piston 14, and the downstream piston 14 and the secondary piston 16 integrated therewith are is moved back and forth repeatedly.
前記制ｍ器２５には、この制御器２５での駆動電流オン
からオフまでの時間またはオフからオンまでの時間を計
測する時ｔｉｌｌ定器３１が接続され、この時間測定器
３１によって、前記ポンプのピストン２１がセンサ２３
．２４間の一定のストロークの移動に要する時間が測定
される。A till meter 31 is connected to the meter controller 25 to measure the time from turning on to turning off the drive current in the controller 25 or from turning it on. The piston 21 is the sensor 23
．． The time required to move a constant stroke of 24 is measured.
さらに、この時間測定器３１に、前記測定時間と任意に
設定された基準時間とを比較する比較器（コンパレータ
）３２が接続され、さらに、この比較器３２に、前記測
定時間が基準時間より長くなつたときにノズル詰りを表
示する表示器（ランプ、ブザー等）３３が接続されてい
る。Further, a comparator 32 is connected to this time measuring device 31 for comparing the measurement time and an arbitrarily set reference time, and furthermore, a comparator 32 is connected to the time measurement device 31, and further, the measurement time is longer than the reference time. An indicator (lamp, buzzer, etc.) 33 is connected to the nozzle to indicate that the nozzle is clogged when the nozzle becomes clogged.
そうして、ノズル２０の目詰りがないときは、ポンプの
ピストン１４．１６．２１が一定の作動速度でスムーズ
に駆動され、そのピストン１４．１６．２１がセンサ２
３．２４間の一定のストロークを移動するのに要する測
定時間が基準時間よりも短い。このような場合は、表示
器３３が作動されない。Then, when the nozzle 20 is not clogged, the piston 14.16.21 of the pump is smoothly driven at a constant operating speed, and the piston 14.16.21 is connected to the sensor 2.
3. The measured time required to move a constant stroke of 24 minutes is shorter than the reference time. In such a case, indicator 33 will not be activated.
また、ノズル２０が目詰りすると、このノズル２０から
の流体吐出流ｍが減少し、ポンプのピストン１４．１６
．２１の作動速度が遅くなり、そのピストンがセンサ２
３．２４間の一定のストロークを移動するのに要する時
間が長くなるので、この時間を時間測定器３１で測定し
、その測定時間が基準時間より長くなった時点で、表示
器３３によってノズル詰りを表示する。Furthermore, when the nozzle 20 becomes clogged, the fluid discharge flow m from this nozzle 20 decreases, and the pump piston 14.16
．． 21's operating speed slows down, and its piston is connected to sensor 2.
3. Since the time required to move a certain stroke between 24 and 24 is long, this time is measured with the time measuring device 31, and when the measured time becomes longer than the reference time, the indicator 33 indicates that the nozzle is clogged. Display.
なお、上記実施例では、センサ２３．２４間のピストン
移動に要する時間を測定したが、センサ２３またはセン
サ２４がそれぞれ単独でピストンを感知する時間間隔す
なわちピストンの往復ストロークの移動に要する時間を
測定するようにしてもよい。In the above embodiment, the time required for the piston to move between the sensors 23 and 24 was measured, but the time interval during which the sensor 23 or the sensor 24 independently senses the piston, that is, the time required for the reciprocating stroke of the piston to move is measured. You may also do so.
本発明によれば、ポンプのピストンが一定のストローク
を作動するのに要する時間を測定し、その測定時間が基
準時間より長くなったときに、ノズル粘りを表示するよ
うにしたから、ノズル先端部分に負圧検出管等の余分な
ものを付加することなくノズルの目詰りを検出できる。According to the present invention, the time required for the pump piston to operate a certain stroke is measured, and when the measured time becomes longer than the reference time, the nozzle viscosity is displayed. Nozzle clogging can be detected without adding any extra equipment such as a negative pressure detection tube.
このため、従来のように負圧検出管が設けられたノズル
と異なりノズルの高速回転も可能であるし、多数のノズ
ルが設けられたノズルヘッドの場合でも、それぞれのノ
ズルに目詰り検出手段を設ける必要もない。Therefore, unlike conventional nozzles equipped with negative pressure detection tubes, the nozzle can rotate at high speed, and even in the case of a nozzle head equipped with many nozzles, each nozzle is equipped with a clogging detection means. There is no need to provide one.
図は本発明のノズル詰り検出方法の一実施例を示すポン
プ断面図および回路図である。
１４、１６・・ピストン、２０・・ノズル。The figures are a pump sectional view and a circuit diagram showing an embodiment of the nozzle clogging detection method of the present invention. 14, 16... Piston, 20... Nozzle.
Claims (1)
受けるノズルの目詰りを検出する方法において、前記ポ
ンプのピストンが一定のストロークを作動するのに要す
る時間を測定し、その測定時間が基準時間より長くなっ
たときに、ノズル詰りを表示することを特徴とするノズ
ル詰り検出方法。(1) In a method for detecting clogging of a nozzle that receives high-pressure fluid from a reciprocating piston type pump, the time required for the piston of the pump to operate a certain stroke is measured, and the measured time is the standard. A nozzle clogging detection method characterized by displaying nozzle clogging when the time becomes longer than the specified time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62336094A JPH01176475A (en) | 1987-12-28 | 1987-12-28 | Nozzle clogging detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62336094A JPH01176475A (en) | 1987-12-28 | 1987-12-28 | Nozzle clogging detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01176475A true JPH01176475A (en) | 1989-07-12 |
Family
ID=18295632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62336094A Pending JPH01176475A (en) | 1987-12-28 | 1987-12-28 | Nozzle clogging detection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01176475A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11872819B2 (en) | 2018-04-28 | 2024-01-16 | Hewlett-Packard Development Company, L.P. | Dispersing concentrated printing fluids |
-
1987
- 1987-12-28 JP JP62336094A patent/JPH01176475A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11872819B2 (en) | 2018-04-28 | 2024-01-16 | Hewlett-Packard Development Company, L.P. | Dispersing concentrated printing fluids |
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