JPH0427581Y2 - - Google Patents
Info
- Publication number
- JPH0427581Y2 JPH0427581Y2 JP7786787U JP7786787U JPH0427581Y2 JP H0427581 Y2 JPH0427581 Y2 JP H0427581Y2 JP 7786787 U JP7786787 U JP 7786787U JP 7786787 U JP7786787 U JP 7786787U JP H0427581 Y2 JPH0427581 Y2 JP H0427581Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure
- internal combustion
- combustion engine
- pressure water
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 83
- 238000002485 combustion reaction Methods 0.000 claims description 39
- 239000007921 spray Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Cleaning In General (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、下水管等の管内清掃、機械類の洗
浄、船壁や魚網の付着物落し或いは建物の壁面清
掃その他に使用される高圧放水装置の駆動制御装
置に関する。[Detailed description of the invention] (Field of industrial application) This invention is a high-pressure water spray that is used for cleaning the inside of sewer pipes, washing machinery, removing deposits from ship walls and fishing nets, cleaning the walls of buildings, etc. The present invention relates to a drive control device for an apparatus.
（従来の技術）
本出願人は、先に第１図示のように、内燃機関
ａにより回転駆動される高圧水ポンプｂと、該高
圧水ポンプｂからの高圧水をホースｃ及び開閉弁
ｄを介してノズルｅへと導く放水回路ｆと、該放
水回路ｆをアンロード弁ｇを介してタンクｈへと
導くアンロード回路ｉとを備えた高圧放水装置を
提案した（特願昭61−275050（特開昭63−
130436））。該高圧放水装置がその運搬の便宜のた
めに車両に搭載されるときは、該高圧水ポンプｂ
を回転駆動する内燃機関ａとして車両の走行用の
内燃機関が兼用され、また該高圧水ポンプｂの搭
載位置を車両のバランス上から好ましい位置に配
置するために内燃機関ａで一旦油圧ポンプｊを駆
動し、該油圧ポンプｊの吐出流体により高圧水ポ
ンプｂに連結した油圧モータｋを駆動するように
構成される。(Prior Art) As shown in the first diagram, the present applicant previously proposed a high-pressure water pump b that is rotationally driven by an internal combustion engine a, and a hose c and an on-off valve d to supply high-pressure water from the high-pressure water pump b. We have proposed a high-pressure water spraying device equipped with a water spraying circuit f that leads to a nozzle e through a water spraying circuit f, and an unloading circuit i that leads the water spraying circuit f to a tank h via an unloading valve g. (Unexamined Japanese Patent Publication 1986-
130436)). When the high-pressure water discharge device is mounted on a vehicle for convenience of transportation, the high-pressure water pump b
The internal combustion engine for driving the vehicle is also used as the internal combustion engine a that rotates and drives the hydraulic pump j. The hydraulic motor k connected to the high-pressure water pump b is configured to be driven by the discharge fluid of the hydraulic pump j.
（考案が解決しようとする問題点）
前記提案のものは、開閉弁ｄを閉じて高圧放水
を一時停止したとき、ホースｃ内の圧力の高まり
でアンロード弁ｇが開き、高圧水ポンプｂの吐出
流体はアンロード回路ｉを介してタンクｈへ排出
され、高圧水ポンプｂは無負荷状態となる。その
ため該高圧水ポンプｂを駆動する内燃機関ａの負
荷も軽減し、その回転数が高回転になり、該内燃
機関ａの騒音の増大や燃費の悪化、更には該内燃
機関ａや高圧水ポンプｂの機械寿命を低下させる
不都合が見られた。(Problems to be solved by the invention) In the above proposal, when the on-off valve d is closed and high-pressure water discharge is temporarily stopped, the unload valve g opens due to the increase in pressure in the hose c, and the high-pressure water pump b is turned off. The discharged fluid is discharged to the tank h via the unload circuit i, and the high-pressure water pump b is placed in an unloaded state. Therefore, the load on the internal combustion engine a that drives the high-pressure water pump b is reduced, and its rotational speed becomes high, causing an increase in the noise of the internal combustion engine a and deterioration of fuel efficiency, and furthermore, the internal combustion engine a and the high-pressure water pump Inconveniences were observed that reduced the mechanical life of b.
本考案の目的は、高圧放水の停止に伴う前記不
都合を解消し、自動的に高圧水ポンプを駆動する
内燃機関の回転数を低下させ得る制御装置を提供
するにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a control device that can eliminate the above-mentioned inconvenience caused by stopping high-pressure water discharge and automatically reduce the rotational speed of an internal combustion engine that drives a high-pressure water pump.
（問題点を解決するための手段）
本考案では、前記目的を達成すべく、内燃機関
により直接或いは間接的に回転駆動される高圧水
ポンプと、該高圧水ポンプからの高圧水をホース
及び開閉弁を介してノズルへと導く放水回路と、
該放水回路の高圧水をアンドロード弁を介してタ
ンクへと導くアンドロード回路とを備えたものに
於いて、該開閉弁の閉弁に伴う信号により作動す
るアクチユエータを設け、該内燃機関の回転数制
御手段に該アクチユエータを連結するようにし
た。(Means for Solving Problems) In order to achieve the above-mentioned object, the present invention includes a high-pressure water pump that is rotationally driven directly or indirectly by an internal combustion engine, and a hose that connects the high-pressure water from the high-pressure water pump to a hose that can be opened and closed. a water discharge circuit that leads to a nozzle via a valve;
The water discharge circuit is equipped with an and-load circuit that guides high-pressure water from the water discharge circuit to the tank via an and-load valve, and is provided with an actuator that is activated by a signal associated with the closing of the on-off valve to control the rotation of the internal combustion engine. The actuator is connected to a numerical control means.
（作用）
該高圧水ポンプが内燃機関により回転されるノ
ズルから例えば150Kg／cm2前後の高圧水が放水さ
れ、下水管の清掃等が行なわれるが、開閉弁を閉
じてその放水を停止すると、放水回路の圧力は回
転を続ける高圧水ポンプからの吐出流体によつて
高まり、その圧力が例えば180Kg／cm2の設定圧に
達するとアンロード弁が作動して放水回路の流体
をアンロード回路からタンクへと排出する。この
アンロード弁が作動すると高圧水ポンプは無負荷
状態となり、開閉弁が開かれて放水回路の圧力が
所定のアンロード圧以下に下がるとアンロード弁
が閉じ、高圧水ポンプは再び負荷状態となつてノ
ズルから高圧水を放水する。高圧水ポンプが無負
荷状態になると、これを駆動する内燃機関の回転
数が上昇し、騒音発生等の不都合を生ずるが、本
考案のものでは、該内燃機関のスロツトルバルブ
等の回転数制御手段を、該開閉弁の閉弁に伴う信
号により作動するアクチユエータと連結したの
で、該開閉弁が閉弁されたとき内燃機関の回転数
を自動的に低下させ得、その回転数の上昇の不都
合を防止出来る。(Function) High-pressure water of, for example, around 150 kg/cm 2 is discharged from the nozzle of the high-pressure water pump rotated by an internal combustion engine to clean sewer pipes, etc., but when the on-off valve is closed and the water discharge is stopped, The pressure in the water discharge circuit is increased by the fluid discharged from the high-pressure water pump that continues to rotate, and when the pressure reaches a set pressure of, for example, 180 kg/cm 2 , the unload valve is activated and the fluid in the water discharge circuit is removed from the unload circuit. Drain into tank. When this unload valve is activated, the high-pressure water pump is in a no-load state, and when the on-off valve is opened and the pressure in the water discharge circuit drops below the predetermined unload pressure, the unload valve is closed and the high-pressure water pump is in a loaded state again. High pressure water is released from the nozzle. When the high-pressure water pump is in a no-load state, the rotation speed of the internal combustion engine that drives it increases, causing problems such as noise generation. Since the means is connected to an actuator actuated by a signal associated with the closing of the on-off valve, the rotational speed of the internal combustion engine can be automatically reduced when the on-off valve is closed, thereby eliminating the inconvenience of an increase in the rotational speed. can be prevented.
（実施例）
本考案の実施例を図面に基づき説明すると、第
２図に於いて符号１は高圧放水装置２の動力源た
るガソリンエンジン等の内燃機関、３は該内燃機
関１により油圧ポンプ４と油圧モータ５を介して
回転駆動されるピストン形の高圧水ポンプ、６は
該高圧水ポンプ３から吐出される高圧水をホース
７及び開閉弁８を介してノズル９へと導く放水回
路、１０は該放水回路６の高圧水をアンロード弁
１１を介してタンク１２へと導くアンロード回路
を示し、該内燃機関１は、高圧放水装置２を車両
に搭載するときは、該車両の走行用の内燃機関が
利用される。１３，１４は車両の走行輪１５と油
圧ポンプ４とに内燃機関１の回転の伝達を切換す
るクラツチである。(Embodiment) An embodiment of the present invention will be described based on the drawings. In FIG. and a piston-type high-pressure water pump rotationally driven via a hydraulic motor 5; 6 a water discharge circuit that guides high-pressure water discharged from the high-pressure water pump 3 to a nozzle 9 via a hose 7 and an on-off valve 8; 10; indicates an unload circuit that guides the high pressure water of the water discharge circuit 6 to the tank 12 via the unload valve 11, and when the internal combustion engine 1 is equipped with the high pressure water discharge device 2 on a vehicle, An internal combustion engine is used. Clutches 13 and 14 switch transmission of the rotation of the internal combustion engine 1 to the running wheels 15 of the vehicle and the hydraulic pump 4.
以上の構成は先に提案したものと特に変わりが
なく、内燃機関１の回転で油圧ポンプ４、油圧モ
ータ５及び高圧水ポンプ３が回転駆動されると、
例えば150Kg／cm2の高圧水が放水回路６からノズ
ル９を介して放水され、その放水で清掃等を行な
い、開閉弁８を閉じて放水を停止したときは、放
水回路６の圧力の高まりでアンロード弁１１が開
き、高圧水ポンプ３からの吐出流はアンロード回
路１０からタンク１２へ排出されることも従来の
ものと同様である。 The above configuration is not particularly different from the one proposed earlier, and when the hydraulic pump 4, hydraulic motor 5, and high-pressure water pump 3 are rotationally driven by the rotation of the internal combustion engine 1,
For example, when high-pressure water of 150 kg/cm 2 is sprayed from the water spray circuit 6 through the nozzle 9, and the water is used for cleaning, etc., and the on-off valve 8 is closed to stop water spray, the pressure in the water spray circuit 6 increases. Similarly to the conventional system, the unload valve 11 is opened and the discharge flow from the high-pressure water pump 3 is discharged from the unload circuit 10 to the tank 12.
而してこのアンロード中は放水回路６の圧力が
アンロード弁１１のアンロード圧に下がるので、
内燃機関１の負荷が小さくなり、その回転数が増
大する不都合を生ずるが、本考案のものでは開閉
弁８の閉弁に伴う信号、例えば、その閉弁後に開
弁するアンロード弁１１の開弁作動の信号や放水
回路６の圧力の高まりによる圧力信号等により作
動するソレノイドプランジヤー等のアクチユエー
タ１６を設け、これを更に内燃機関１のスロツト
ル弁や燃料供給制御弁からなる回転数制御手段１
７に連結し、開閉弁８が閉弁されたとき内燃機関
１の回転数が自動的に例えば設定されたアイドル
回転数に低下されるようにした。 During this unloading, the pressure in the water discharge circuit 6 decreases to the unloading pressure of the unloading valve 11.
This causes the disadvantage that the load on the internal combustion engine 1 decreases and its rotational speed increases, but in the present invention, the signal accompanying the closing of the on-off valve 8, for example, the opening of the unloading valve 11 which opens after the closing of the on-off valve 8, is inconvenient. An actuator 16 such as a solenoid plunger that is actuated by a valve operation signal or a pressure signal due to an increase in pressure in the water discharge circuit 6 is provided, and this actuator 16 is further connected to the rotation speed control means 1 consisting of a throttle valve and a fuel supply control valve of the internal combustion engine 1.
7, so that when the on-off valve 8 is closed, the rotational speed of the internal combustion engine 1 is automatically reduced to, for example, a set idle rotational speed.
これを更に詳述するに、該開閉弁８の閉弁で放
水回路６の圧力が高まるとアンロード弁１１が開
弁するが、その弁体１１ａの開弁作動でソレノイ
ドプランジヤーからなるアクチユエータ１６へ通
電するスイツチ１１ｂを作動させ、該アクチユエ
ータ１６の励磁作動で内燃機関１のスロツトル弁
からなる回転数制御手段１７に該内燃機関１の回
転数を低下するような作動を行なわせ、かくてア
ンロード弁１１が開いて放水回路６の圧力がアン
ロード圧になつたときに内燃機関１による騒音を
防止し、その燃費の向上と高圧水ポンプ３の駆動
系の機械的損耗を防ぐことが出来る。そして開閉
弁８が再び開かれ、放水回路６の圧力がアンロー
ド圧よりも下がると、アンロード弁１１は自動的
に閉じ、これと共にスイツチ１１ｂが切れ、アク
チユエータ１６の回転数制御手段１７に対する作
用が解かれるので内燃機関１の回転数はもとの回
転数に復帰する。 To explain this in more detail, when the pressure in the water discharge circuit 6 increases due to the closing of the on-off valve 8, the unloading valve 11 opens, and the actuator 16 consisting of a solenoid plunger opens when the valve element 11a opens. The actuator 16 is energized to cause the rotational speed control means 17 consisting of a throttle valve of the internal combustion engine 1 to perform an operation to lower the rotational speed of the internal combustion engine 1. When the load valve 11 opens and the pressure in the water discharge circuit 6 reaches the unloading pressure, noise caused by the internal combustion engine 1 can be prevented, improving fuel efficiency and preventing mechanical wear and tear on the drive system of the high-pressure water pump 3. . When the on-off valve 8 is opened again and the pressure in the water discharge circuit 6 falls below the unloading pressure, the unloading valve 11 is automatically closed, and at the same time the switch 11b is turned off, acting on the rotation speed control means 17 of the actuator 16. is resolved, the rotational speed of the internal combustion engine 1 returns to the original rotational speed.
該開閉弁８の閉弁に伴い放水回路６の圧力が高
まるが、該放水回路６に第３図示のように圧力ス
イツチ１８を設け、該圧力スイツチ１８の作動圧
力をアンロード弁１１のアンロード圧と作動圧の
中間圧に設定し、該アンロード弁１１が作動して
圧力が低下したとき該圧力スイツチ１８が作動
し、電気信号でソレノイドプランジヤーからなる
アクチユエータ１６に励磁作動を行なわせ、内燃
機関１の回転数を低下させるように回転数制御手
段１７を作動させることも可能である。この場
合、開閉弁８が再び開かれ、放水回路６の圧力が
アンロード弁１１のアンロード圧より作動圧まで
昇圧すると圧力スイツチ１８が戻り、アクチユエ
ータ１６の回転数制御手段１７に対する作用が解
除され、内燃機関１の回転数がもとに戻る。 The pressure in the water discharge circuit 6 increases as the on-off valve 8 closes, but a pressure switch 18 is provided in the water discharge circuit 6 as shown in the third figure, and the operating pressure of the pressure switch 18 is changed to the unloading pressure of the unload valve 11. The pressure is set at an intermediate pressure between the pressure and the operating pressure, and when the unload valve 11 is activated and the pressure decreases, the pressure switch 18 is activated, and the actuator 16 consisting of a solenoid plunger is activated by an electric signal. It is also possible to operate the rotation speed control means 17 so as to reduce the rotation speed of the internal combustion engine 1. In this case, when the on-off valve 8 is opened again and the pressure in the water discharge circuit 6 is increased to the operating pressure from the unload pressure of the unload valve 11, the pressure switch 18 is returned and the action on the rotation speed control means 17 of the actuator 16 is released. , the rotational speed of the internal combustion engine 1 returns to its original value.
また該開閉弁８の閉弁に伴い放水回路６の圧力
が高まり、アンロード弁１１が開弁すると、アン
ロード回路１０にタンク１２へ排出される流体が
流れるが、該アンロード回路１０に第４図示のよ
うにフロースイツチ１９を設け、該回路１０を排
出流体が流れるときに該スイツチ１９がアクチユ
エータ１６を作動させる電気信号を発し、該アク
チユエータ１６の作動で回転数制御手段１７が内
燃機関１の回転数を低下させるようにしてもよ
い。この場合も、開閉弁８が再び開かれ、放水回
路６の圧力がアンロード弁１１のアンロード圧よ
りも下がると、アンロード弁１１は閉じてそのア
ンロード作用が止まるが、フロースイツチ１９は
アンロード回路１０の流れの停止により自動的に
切れ、アクチユエータ１６の回転数制御手段１７
に対する作用が解かれる。これによつて内燃機関
１の回転数はアクチユエータ１６の作用前の回転
数に戻る。 Further, when the on-off valve 8 is closed, the pressure in the water discharge circuit 6 increases, and when the unload valve 11 is opened, the fluid to be discharged to the tank 12 flows into the unload circuit 10. 4. As shown in the figure, a flow switch 19 is provided, and when the exhaust fluid flows through the circuit 10, the switch 19 generates an electric signal to operate the actuator 16, and the operation of the actuator 16 causes the rotation speed control means 17 to control the internal combustion engine 1. The number of revolutions may be lowered. In this case as well, when the on-off valve 8 is opened again and the pressure in the water discharge circuit 6 falls below the unloading pressure of the unloading valve 11, the unloading valve 11 closes and its unloading action stops, but the flow switch 19 The rotation speed control means 17 of the actuator 16 is automatically turned off when the flow of the unload circuit 10 stops.
The action on is solved. As a result, the rotational speed of the internal combustion engine 1 returns to the rotational speed before actuator 16 was activated.
また更に、該アクチユエータ１６を第５図示の
如くダイヤフラム形のアクチユエータで構成し、
ダイヤフラム１６ａの両側の室１６ｂ，１６ｃを
夫々ソレノイド弁２０ａ，２０ｂに接続してもス
ロツトル弁の回転数制御手段１７を制御すること
が可能である。この場合、一方のソレノイド弁２
０ａは、圧力スイツチ１８からソレノイドスイツ
チ２１へ信号が入力してONになると室１６ｂを
内燃機関１の吸気回路に連なるチエツク弁２２へ
と接続するように作動し、もう一方のソレノイド
弁２０ｂは、該ソレノイドスイツチ２１がONに
なると室１６ｃを大気圧の外部へと接続するよう
に作動するものが夫々使用され、該スイツチ２１
のONで室１６ｂに吸気回路の吸気圧が導入され
ると連結部材１６ｄを作動させ、回転数を低下さ
せるように回転数制御手段１７を作動することが
出来る。またスイツチ２１がOFFのときは、ソ
レノイド弁２０ａは室１６ｂを大気圧の外部へ接
続し、もう一方のソレノイド弁２０ｂは室１６ｃ
をチエツク弁２２に接続するので、連結部材１６
ｄは内燃機関１の回転数を上げるように回転数制
御手段１７を作動する。 Furthermore, the actuator 16 is constituted by a diaphragm type actuator as shown in FIG.
It is also possible to control the rotation speed control means 17 of the throttle valve by connecting the chambers 16b, 16c on both sides of the diaphragm 16a to the solenoid valves 20a, 20b, respectively. In this case, one solenoid valve 2
0a operates to connect the chamber 16b to the check valve 22 connected to the intake circuit of the internal combustion engine 1 when a signal is input from the pressure switch 18 to the solenoid switch 21 and turns ON, and the other solenoid valve 20b Each solenoid switch 21 is operated to connect the chamber 16c to the outside at atmospheric pressure when the solenoid switch 21 is turned on.
When the intake pressure of the intake circuit is introduced into the chamber 16b by turning ON, the connecting member 16d is operated, and the rotational speed control means 17 can be operated to reduce the rotational speed. When the switch 21 is OFF, the solenoid valve 20a connects the chamber 16b to the outside of the atmospheric pressure, and the other solenoid valve 20b connects the chamber 16b to the outside of the atmospheric pressure.
is connected to the check valve 22, so the connecting member 16
d operates the rotation speed control means 17 to increase the rotation speed of the internal combustion engine 1.
従つて、開閉弁８が閉じられ、放水回路６の圧
力の高まりでアンロード弁１１が開いて高圧水ポ
ンプ３が無負荷状態になり、内燃機関１の回転数
が上がるようになつた場合、圧力スイツチ１８が
ソレノイドスイツチ２１へ電気信号を送り、ソレ
ノイド弁２０ａ，２０ｂ及びダイヤフラム１６ａ
が作動して内燃機関１の回転数をアイドル回転数
程度の回転数に制御するように回転制数制御手段
１７を作動する。 Therefore, when the on-off valve 8 is closed and the unload valve 11 is opened due to the increase in pressure in the water discharge circuit 6, the high-pressure water pump 3 is placed in an unloaded state and the rotational speed of the internal combustion engine 1 is increased. The pressure switch 18 sends an electrical signal to the solenoid switch 21, and the solenoid valves 20a, 20b and diaphragm 16a
is activated to operate the rotational speed control means 17 so as to control the rotational speed of the internal combustion engine 1 to approximately the idle rotational speed.
尚、該スイツチ２１をON，OFFする信号は、
第２図示のようなアンロード弁１１に設けたスイ
ツチ１１ｂから、或いは第４図示のようなアンロ
ード回路１０に設けたフロースイツチ１９から入
力するようにしてもよい。 The signal for turning the switch 21 on and off is as follows:
The input may be made from a switch 11b provided in the unload valve 11 as shown in the second figure, or from a flow switch 19 provided in the unload circuit 10 as shown in the fourth figure.
放水回路６の高圧水の圧力は高圧水ポンプ３の
回転数に比例するので、第４図示の如く内燃機関
１の回転数制御手段１７に更に電圧に比例して作
動距離が変るソレノイド２３や手動により作動さ
れる操作部材２４を接続し、内燃機関１の回転数
を該操作部材２４の操作にて制御することにより
高圧水の圧力を調製する構成を付加することも可
能である。 Since the pressure of high-pressure water in the water discharge circuit 6 is proportional to the rotation speed of the high-pressure water pump 3, as shown in FIG. It is also possible to add a configuration in which the pressure of the high-pressure water is adjusted by connecting an operating member 24 that is operated by and controlling the rotation speed of the internal combustion engine 1 by operating the operating member 24.
具体的には該内燃機関１が550c.c.ガソリンエン
ジンで、そのアイドル回転数が700rpm，高圧水
ポンプ３が150Kg／cm2の高圧水をノズル９から放
水するときのエンジン回転数が1500rpmである
と、開閉弁８を閉じてアンロード弁１１が開いた
ときエンジン回転数は1700rpmに上昇して騒音等
の前記不都合を生ずるおそれがあるが、該開閉弁
８の閉弁に伴い生ずる信号により回転数制御手段
１７を連動するアクチユエータ１６が作動し、エ
ンジン回転数を700rpmの低回転に抑え得るので
前記不都合は生じない。 Specifically, the internal combustion engine 1 is a 550 c.c. gasoline engine, the idle speed is 700 rpm, and the engine speed is 1500 rpm when the high-pressure water pump 3 sprays high-pressure water of 150 kg/cm 2 from the nozzle 9. If so, when the on-off valve 8 is closed and the unload valve 11 is opened, the engine speed will rise to 1700 rpm, which may cause the above-mentioned problems such as noise. The actuator 16 that interlocks the rotational speed control means 17 operates and the engine rotational speed can be suppressed to a low rotation of 700 rpm, so that the above-mentioned disadvantage does not occur.
（考案の効果）
以上のように本考案によるときは、ノズルから
の高圧水の放水を制御する開閉弁の閉弁により生
ずる信号により作動するアクチユエータを設け、
該アクチユエータを高圧水ポンプ駆動用の内燃機
関の回転数制御手段に連結したので、開閉弁を閉
じて高圧水の放水を停止したときに自動的に該内
燃機関の回転数を低下させて静粛運転を行なわせ
ることが出来、燃費が向上すると共に高圧水ポン
プの駆動系の機械的損耗も小さくなり耐久性が向
上する等の効果がある。(Effects of the invention) As described above, according to the invention, an actuator is provided that is operated by a signal generated by closing the on-off valve that controls the discharge of high-pressure water from the nozzle,
Since the actuator is connected to the rotation speed control means of the internal combustion engine for driving the high-pressure water pump, when the on-off valve is closed to stop discharging high-pressure water, the rotation speed of the internal combustion engine is automatically lowered to achieve quiet operation. This has the effect of improving fuel efficiency, reducing mechanical wear and tear on the drive system of the high-pressure water pump, and improving durability.
第１図は従来例の説明線図、第２図は本考案の
実施例の説明線図、第３図乃至第５図の夫々は本
考案の他の実施例の説明線図を示す。
１……内燃機関、３……高圧水ポンプ、６……
放水回路、７……ホース、８……開閉弁、９……
ノズル、１０……アンロード回路、１１……アン
ロード弁、１２……タンク、１６……アクチユエ
ータ、１７……回転数制御手段。
FIG. 1 is an explanatory diagram of a conventional example, FIG. 2 is an explanatory diagram of an embodiment of the present invention, and each of FIGS. 3 to 5 is an explanatory diagram of other embodiments of the present invention. 1...Internal combustion engine, 3...High pressure water pump, 6...
Water discharge circuit, 7...hose, 8...open/close valve, 9...
Nozzle, 10... Unload circuit, 11... Unload valve, 12... Tank, 16... Actuator, 17... Rotation speed control means.
Claims (1)
と、該高圧水ポンプからの高圧水をホース及び開
閉弁を介してノズルへと導く放水回路と、該放水
回路の高圧水をアンドロード弁を介してタンクへ
と導くアンドロード回路とを備えたものに於い
て、該開閉弁の閉弁に伴う信号により作動するア
クチユエータを設け、該内燃機関の回転数制御手
段に該アクチユエータを連結したことを特徴とす
る高圧放水装置の駆動制御装置。 A high-pressure water pump rotationally driven by an internal combustion engine, a water discharge circuit that guides high-pressure water from the high-pressure water pump to a nozzle via a hose and an on-off valve, and a water discharge circuit that directs high-pressure water from the water discharge circuit to a tank via an and-load valve. and an and-load circuit leading to the internal combustion engine, the apparatus is characterized in that an actuator is provided which is activated by a signal associated with the closing of the on-off valve, and the actuator is connected to a rotation speed control means of the internal combustion engine. Drive control device for high-pressure water spray equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7786787U JPH0427581Y2 (en) | 1987-05-23 | 1987-05-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7786787U JPH0427581Y2 (en) | 1987-05-23 | 1987-05-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63189380U JPS63189380U (en) | 1988-12-06 |
| JPH0427581Y2 true JPH0427581Y2 (en) | 1992-07-02 |
Family
ID=30926277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7786787U Expired JPH0427581Y2 (en) | 1987-05-23 | 1987-05-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0427581Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0730922Y2 (en) * | 1988-05-30 | 1995-07-19 | 有光工業株式会社 | Engine rotation control device in pump device |
-
1987
- 1987-05-23 JP JP7786787U patent/JPH0427581Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63189380U (en) | 1988-12-06 |
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