JPS632115Y2 - - Google Patents
Info
- Publication number
- JPS632115Y2 JPS632115Y2 JP1980074020U JP7402080U JPS632115Y2 JP S632115 Y2 JPS632115 Y2 JP S632115Y2 JP 1980074020 U JP1980074020 U JP 1980074020U JP 7402080 U JP7402080 U JP 7402080U JP S632115 Y2 JPS632115 Y2 JP S632115Y2
- Authority
- JP
- Japan
- Prior art keywords
- pump
- chemical
- chemical liquid
- way valve
- tank
- 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
- 239000000126 substance Substances 0.000 claims description 43
- 239000007788 liquid Substances 0.000 claims description 33
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000005507 spraying Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002420 orchard Substances 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Nozzles (AREA)
Description
【考案の詳細な説明】
この考案は、動力噴霧機による薬剤散布に際
し、噴出管に設けたノズルからの薬液噴出が中断
されたとき、動力噴霧機に付設されたポンプに加
えられる薬液の異常な圧力上昇に基づく負荷を、
三方弁の切換で薬液を薬液タンクへ還流させるこ
とで容易に軽減可能な動力噴霧機のポンプ負荷軽
減装置に関するものである。[Detailed description of the device] This device is designed to prevent abnormal chemical liquid from being added to the pump attached to the power sprayer when the jetting of the chemical from the nozzle installed in the jet pipe is interrupted during chemical spraying by a power sprayer. load based on pressure increase,
This invention relates to a pump load reduction device for a power sprayer that can be easily reduced by recirculating a chemical liquid to a chemical liquid tank by switching a three-way valve.
動力噴霧機で薬液を田園、果樹園、造林地等に
散布するとき、薬液タンク内の薬液を動力噴霧機
に付設されたポンプに吸入し、このポンプから吐
出管を介し噴出管に設けたノズルから噴出してい
るが、この薬液噴出を一時的に中断するとき、薬
液が噴出管、吐出管内に滞留するため液圧が上昇
し、ポンプの吐出側を介しポンプに対し液圧上昇
に基づく負荷が不当に加えられ、ポンプ部材の亀
裂、損傷等の事故発生で、薬液散布の再開に際
し、支障を招く惧れがある。 When using a power sprayer to spray chemical solutions onto fields, orchards, afforestation areas, etc., the chemical solution in the chemical solution tank is sucked into a pump attached to the power sprayer, and from this pump is passed through a discharge pipe to a nozzle installed in the spray pipe. However, when this jetting of chemical liquid is temporarily interrupted, the liquid pressure increases because the chemical liquid stays in the ejection pipe and discharge pipe, and the load due to the increase in liquid pressure is applied to the pump via the discharge side of the pump. If the chemical is applied inappropriately, accidents such as cracks and damage to pump members may occur, which may cause problems when restarting chemical spraying.
そこでこの考案は前述のような欠点に着目して
なされたもので、薬液タンクに連通せるポンプの
吐出管中途に弁を配設した動力噴霧機において、
前記吐出管中途に切換可能な三方弁を配設し、該
三方弁の一端開口部に、前記薬液タンクへ連通す
る復帰管を連結した調圧弁付の分配器を介し複数
個のノズルを連通させると共に、前記三方弁の他
端開口部に前記薬液タンクへ連通する戻管を接続
し、前記三方弁の切換でポンプからの薬液を薬液
タンクへ還流させるようにしたものである。 Therefore, this idea was created by focusing on the above-mentioned drawbacks, and in a power sprayer in which a valve is installed in the middle of the discharge pipe of the pump that communicates with the chemical tank,
A switchable three-way valve is disposed in the middle of the discharge pipe, and a plurality of nozzles are communicated with one end opening of the three-way valve via a distributor with a pressure regulating valve connected to a return pipe communicating with the chemical solution tank. In addition, a return pipe communicating with the chemical liquid tank is connected to the other end opening of the three-way valve, and the chemical liquid from the pump is returned to the chemical liquid tank by switching the three-way valve.
以下図面についてこの考案の一実施例を説明す
る。架台に、原動機（図示しない）、薬液タンク
Ｔ、ポンプＰ、分配器Ｄ、ノズルｎを付設せる噴
出管J1，J2…J5等を搭載し、薬液タンクＴとポン
プＰは吸入管１、ポンプＰと分配器Ｄは中途に三
方弁Ｖを介装せる吐出管２、分配器Ｄと噴出管
J1，J2…J5の夫々は、中途に開閉弁e1，e2…e5を
介装せる送液管３1，３2…３5で夫々接続され、
分配器Ｄは之に付設された調圧弁ｂを介し復帰管
４で薬液タンクＴに接続させると共に、前記三方
弁Ｖの開口部の一つに、戻管５を介し薬液タンク
Ｔを連通させてある。しかして前記開閉弁e1，e2
…e5は遠隔操作もしくは手動で開閉可能であり、
また分配器ＤにおいてポンプＰから送られる薬液
がオーバーフロー（Over flow）の状態になつた
とき、調圧弁ｂの開放で薬液タンクＴに流入可能
となし、前記吐出管２内の圧力が異常に上昇し、
ポンプＰに過大な負荷が加えられるようなときに
は、三方弁Ｖの操作による流路切換でポンプＰと
戻管５との連通で分配器Ｄへの流路遮断により薬
液を薬液タンクＴに還流可能としてある。図中、
Ｓはストレーナ、ａは撹拌機である。 An embodiment of this invention will be described below with reference to the drawings. A prime mover (not shown), a chemical tank T, a pump P, a distributor D, and ejection pipes J 1 , J 2 ...J 5 to which a nozzle n is attached are mounted on the frame, and the chemical tank T and pump P are connected to the suction pipe 1. , the pump P and the distributor D are a discharge pipe 2 with a three-way valve V interposed in the middle, the distributor D and the jet pipe
Each of J 1 , J 2 ...J 5 is connected by a liquid sending pipe 3 1 , 3 2 ... 3 5 , which has an on-off valve e 1 , e 2 ... e 5 interposed in the middle,
The distributor D is connected to the chemical liquid tank T through a return pipe 4 through a pressure regulating valve b attached thereto, and also communicates with the chemical liquid tank T through a return pipe 5 to one of the openings of the three-way valve V. be. However, the on-off valves e 1 , e 2
…e 5 can be opened and closed by remote control or manually,
In addition, when the chemical liquid sent from the pump P reaches the overflow state in the distributor D, the pressure regulating valve b is opened to allow it to flow into the chemical liquid tank T, and the pressure in the discharge pipe 2 increases abnormally. death,
When an excessive load is applied to the pump P, the chemical solution can be returned to the chemical solution tank T by switching the flow path by operating the three-way valve V and connecting the pump P with the return pipe 5 to shut off the flow path to the distributor D. It is as follows. In the figure,
S is a strainer, and a is a stirrer.
この考案は、前述のような構成であるから、三
方弁ＶでポンプＰと分配器Ｄとを連通、ポンプＰ
と戻管５とを遮断させた状態下におき、原動機を
起動するとき、薬液タンクＴ内の薬液は吸入管
１、ポンプＰ、吐出管２、分配器Ｄを介し送液管
３1，３2…３5の夫々に分流した後、噴出管J1，J2
…J5の夫々に付設せるノズルｎから被散布物（図
示しない）に向け散布される。薬液散布を一時的
に中断すべく、開閉弁e1，e2…e5の夫々を閉塞す
るとき、薬液は吐出管２内に滞留され、圧力が上
昇するが、この際、三方弁Ｖの流路切換操作でポ
ンプＰを戻管５に連通させると、分配器Ｄとポン
プＰとの連通が遮断される結果、吐出管２内の薬
液は三方弁Ｖを経て戻管５を介し薬液タンクＴに
還流されるため、吐出管２内の圧力が低減され、
ポンプＰに加えられる負荷が軽減されるし、また
散布中断に際し、分配器Ｄに薬液が過大に流入す
るとき、調圧弁ｂの開放により復帰管４を介し薬
液タンクＴに流入させ得て薬液流動に支障を招来
する惧れもない。 Since this invention has the above-mentioned configuration, the three-way valve V connects the pump P and the distributor D, and the pump P
When the prime mover is started with the main engine and return pipe 5 cut off, the chemical liquid in the chemical liquid tank T flows through the suction pipe 1, the pump P, the discharge pipe 2, and the distributor D to the liquid sending pipes 3 1 , 3 . 2 ...3 After branching into each of 5 , the jet pipes J 1 and J 2
...J 5 is sprayed from a nozzle n attached to each of the objects to be sprayed (not shown). When each of the on-off valves e 1 , e 2 . When the pump P is communicated with the return pipe 5 by the flow path switching operation, the communication between the distributor D and the pump P is cut off, and as a result, the chemical liquid in the discharge pipe 2 passes through the three-way valve V and the return pipe 5 to the chemical liquid tank. Since it is refluxed to T, the pressure inside the discharge pipe 2 is reduced,
The load on the pump P is reduced, and when an excessive amount of chemical liquid flows into the distributor D during discontinuation of spraying, the pressure regulating valve b can be opened to allow the chemical liquid to flow into the chemical liquid tank T via the return pipe 4, thereby reducing the flow of the chemical liquid. There is no risk of causing any problems.
この考案によれば、分配器を之に付設せる調圧
弁を復帰管を介し薬液タンクに連通させてあるの
で、複数個のノズルからの薬液散布を同時に中断
して送液管内の圧力上昇による送液管の破損や接
手個所での漏洩を確実に防止でき、また三方弁の
流路切換でポンプを戻管に連通させることで、薬
液の散布中断による吐出管内での異常な液圧上昇
に際しても之を解消し、ポンプへの過大な負荷が
軽減され、ポンプに付帯せる弁、密封体等の損
耗、破損を未然に阻止できると共に、吐出管での
異常な圧力上昇による損傷、液体漏洩等を防止で
きる。 According to this invention, the pressure regulating valve attached to the distributor is communicated with the chemical liquid tank via the return pipe, so that the spraying of chemical liquid from multiple nozzles can be stopped at the same time, and the pressure increase in the liquid feeding pipe can be stopped. Damage to the liquid pipe and leakage at joints can be reliably prevented, and by connecting the pump to the return pipe by switching the flow path of the three-way valve, it can be prevented even in the event of an abnormal rise in liquid pressure in the discharge pipe due to interruption of chemical spraying. This eliminates this problem, reduces the excessive load on the pump, prevents wear and tear on valves and sealing bodies attached to the pump, and prevents damage caused by abnormal pressure rise in the discharge pipe, liquid leakage, etc. It can be prevented.
三方弁の流路切換で分配器への薬液流出を阻止
することで、ポンプの運転を中止することなく、
吐出管内のストレーナの清掃、開閉弁の点検、修
復等も極めて容易に行ない得る等の利点を有する
ものである。 By blocking the flow of chemical liquid to the distributor by switching the flow path of the three-way valve, it is possible to prevent the chemical from flowing into the distributor without stopping pump operation.
This has the advantage that the strainer in the discharge pipe can be cleaned, and the on-off valve can be inspected and repaired very easily.
図面はこの考案に係る一実施例の要部配管図で
ある。
Ｄ……分配器、Ｐ……ポンプ、Ｔ……薬液タン
ク、Ｖ……三方弁、ｂ……調圧弁、ｎ……ノズ
ル、２……吐出管、４……復帰管、５……戻管。
The drawing is a piping diagram of the main parts of one embodiment of this invention. D... Distributor, P... Pump, T... Chemical tank, V... Three-way valve, b... Pressure regulating valve, n... Nozzle, 2... Discharge pipe, 4... Return pipe, 5... Return tube.
Claims (1)
を配設した動力噴霧機において、前記吐出管２中
途に切換可能な三方弁Ｖを配設し、該三方弁Ｖの
一端開口部に、前記薬液タンクＴへ連通する復帰
管４を連結した調圧弁ｂ付の分配器Ｄを介し複数
個のノズルｎを連通させると共に、前記三方弁Ｖ
の他端開口部に、前記薬液タンクＴへ連通する戻
管５を接続し、前記三方弁Ｖの切換で前記ポンプ
Ｐからの薬液タンクＴへ還流させるようにした動
力噴霧機のポンプ負荷軽減装置。 In a power sprayer in which a valve is disposed in the middle of the discharge pipe of a pump that communicates with a chemical solution tank, a switchable three-way valve V is disposed in the middle of the discharge pipe 2, and the chemical solution is A plurality of nozzles n are communicated via a distributor D with a pressure regulating valve b connected to a return pipe 4 communicating with the tank T, and the three-way valve V
A pump load reduction device for a power sprayer, in which a return pipe 5 communicating with the chemical liquid tank T is connected to the other end opening, and the flow is returned from the pump P to the chemical liquid tank T by switching the three-way valve V. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980074020U JPS632115Y2 (en) | 1980-05-30 | 1980-05-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980074020U JPS632115Y2 (en) | 1980-05-30 | 1980-05-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56176072U JPS56176072U (en) | 1981-12-25 |
| JPS632115Y2 true JPS632115Y2 (en) | 1988-01-20 |
Family
ID=29436765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980074020U Expired JPS632115Y2 (en) | 1980-05-30 | 1980-05-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS632115Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5216373A (en) * | 1975-07-28 | 1977-02-07 | Kunimatsu Kuroda | Sprayer |
-
1980
- 1980-05-30 JP JP1980074020U patent/JPS632115Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5216373A (en) * | 1975-07-28 | 1977-02-07 | Kunimatsu Kuroda | Sprayer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56176072U (en) | 1981-12-25 |
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