JPH11290739A - Safeguard of pump in liquid spraying car - Google Patents
Safeguard of pump in liquid spraying carInfo
- Publication number
- JPH11290739A JPH11290739A JP10099243A JP9924398A JPH11290739A JP H11290739 A JPH11290739 A JP H11290739A JP 10099243 A JP10099243 A JP 10099243A JP 9924398 A JP9924398 A JP 9924398A JP H11290739 A JPH11290739 A JP H11290739A
- Authority
- JP
- Japan
- Prior art keywords
- pump
- liq
- liquid
- temp
- spraying
- 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.)
- Granted
Links
Landscapes
- Special Spraying Apparatus (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は走行路面に水や洗浄
液等の液体を散布して走行路面等を清掃したり、街路樹
に水を散布する液体散布車に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid spraying vehicle for spraying liquid such as water or a cleaning liquid on a running road surface to clean the running road surface or the like, or for spraying water on a street tree.
【0002】[0002]
【従来の技術】従来の液体散布車は、車体上に搭載され
たタンク下部にポンプを接続し、前記ポンプには吐出管
を介して車体後方に配設された散布ノズルを接続してあ
り、前記ポンプを駆動することによりタンク内の液体を
散布ノズルから走行路面等に散布するようにしてある。2. Description of the Related Art In a conventional liquid spraying vehicle, a pump is connected to a lower portion of a tank mounted on a vehicle body, and a spraying nozzle disposed behind the vehicle body via a discharge pipe is connected to the pump. By driving the pump, the liquid in the tank is sprayed from a spray nozzle onto a running road surface or the like.
【0003】ところで前記ポンプには排液口を設けてあ
り、散布作業終了後に前記排液口に接続された手動開閉
弁を開くことによりポンプ内に残留する液体を排出し、
ポンプ内の液体が凍結してポンプが破損するのを防止す
るようにしてある。By the way, the pump is provided with a drain port, and after the spraying operation is completed, the liquid remaining in the pump is discharged by opening a manual opening / closing valve connected to the drain port.
The liquid in the pump is prevented from freezing and the pump is prevented from being damaged.
【0004】[0004]
【発明が解決しようとする課題】ところが、散布作業終
了後の排液作業を忘れる場合があり、その場合には夜間
になって外気温が低下することにより、ポンプ内に残留
した液体は凍結して体積が膨張することからポンプが破
損するという問題がある。そこで本発明は外気温が低下
するとポンプ内に残留している液体の排液作業を自動的
に行うようにしてポンプ内の液体が凍結してポンプが破
損するのを確実に防止できるようにするものである。However, there is a case where the draining operation after the spraying operation is forgotten is forgotten. In such a case, the liquid remaining in the pump freezes due to the outside temperature dropping at night. Therefore, there is a problem that the pump is damaged because the volume expands. Therefore, the present invention is to automatically perform the draining operation of the liquid remaining in the pump when the outside air temperature decreases, so as to reliably prevent the liquid in the pump from freezing and damaging the pump. Things.
【0005】[0005]
【課題を解決するための手段】本発明は、車体上にタン
クを搭載し、前記タンクにはタンク内の液体を圧送しう
るポンプを設け、前記ポンプには散布手段を接続してポ
ンプにより圧送された液体を散布手段から散布するよう
にした液体散布車において、前記ポンプにはポンプ内に
残留した液体を排出しうる排液口を設け、前記排液口に
は、駆動手段の駆動にて排液口を開放しうる自動開閉弁
を設け、前記駆動手段には、外気温等の所定温度を検知
すると駆動手段を駆動させうる温度検知手段を設けたこ
とを特徴とするものである。According to the present invention, a tank is mounted on a vehicle body, a pump capable of pumping the liquid in the tank is provided in the tank, and a spraying means is connected to the pump so that the pump is pumped by the pump. In the liquid spraying vehicle which sprays the liquid from the spraying means, the pump is provided with a drainage port capable of discharging the liquid remaining in the pump, and the drainage port is driven by driving means. An automatic on-off valve capable of opening a drain port is provided, and the driving means is provided with a temperature detecting means capable of driving the driving means when a predetermined temperature such as an outside air temperature is detected.
【0006】[0006]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。図1及び図2において、1は走行
路面に液体を散布して清掃作業を行うための液体散布車
で、該液体散布車1は車体2上に液体を収容するタンク
3を搭載してある。Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1 denotes a liquid spraying vehicle for spraying a liquid on a traveling road surface to perform a cleaning operation. The liquid spraying vehicle 1 has a tank 3 for storing a liquid on a vehicle body 2.
【0007】前記タンク3の側面下部にはタンク3内に
収容された液体を圧送するポンプ4を吸引管5を介して
設けてあり、前記ポンプ4にはタンク3側方にて車体2
の前後方向に延びる吐出管6の一端を接続し、前記吐出
管6の他端には車体2後部に車幅方向に延びる散布管7
を接続してある。前記散布管7には散布手段である複数
の散布ノズル8を設けてあり、前記ポンプ4を駆動する
ことによりタンク3内の液体を吐出管6、散布管7を介
して散布ノズル8から走行路面に散布するようにしてあ
る。[0007] A pump 4 for pumping the liquid contained in the tank 3 is provided through a suction pipe 5 at a lower portion of the side surface of the tank 3.
Is connected to one end of a discharge pipe 6 extending in the front-rear direction.
Is connected. The spraying pipe 7 is provided with a plurality of spraying nozzles 8 serving as spraying means, and by driving the pump 4, the liquid in the tank 3 is discharged from the spraying nozzle 8 via the discharge pipe 6 and the spraying pipe 7 to the traveling road surface. To be sprayed.
【0008】前記ポンプ4は図3に示す如くポンプケー
ス9内に一対のロータ10を設けてあり、前記ポンプケ
ース9は前記ロータ10を介して吸引室11と吐出室1
2とを形成してある。前記吸引室11の側面には前記吸
引管5に接続される吸引口13を形成し、また前記吐出
室12の上面には前記吐出管6に接続される吐出口14
を形成してあり、前記ロータ10を回転させることによ
り吸引口13から吸引された液体を吐出口14から吐出
管6に圧送するようになっている。The pump 4 has a pair of rotors 10 provided in a pump case 9 as shown in FIG. 3, and the pump case 9 has a suction chamber 11 and a discharge chamber 1 via the rotor 10.
2 is formed. A suction port 13 connected to the suction pipe 5 is formed on a side surface of the suction chamber 11, and a discharge port 14 connected to the discharge pipe 6 is formed on an upper surface of the discharge chamber 12.
By rotating the rotor 10, the liquid sucked from the suction port 13 is fed from the discharge port 14 to the discharge pipe 6 under pressure.
【0009】前記ポンプケース9の下部にはリリーフ弁
15を設けてあり、前記吐出管6内の液体が詰まった際
に、吐出室12内が高圧になると前記リリーフ弁15が
開いて前記吐出室12内の液体を吸引室11へ流出させ
ることにより、吐出室12の圧力が異常高圧にならない
ようにしてポンプ4の損傷を防止するようにしてある。A relief valve 15 is provided at a lower portion of the pump case 9. When the pressure in the discharge chamber 12 becomes high when the liquid in the discharge pipe 6 is clogged, the relief valve 15 opens to open the discharge chamber. By causing the liquid in the chamber 12 to flow into the suction chamber 11, the pressure in the discharge chamber 12 does not become abnormally high, thereby preventing the pump 4 from being damaged.
【0010】前記ポンプ4には、散布作業終了後、ポン
プ4内に残留した液体を自動的に排出して液体の凍結に
よるポンプケース9の破損を防止するための安全装置1
6を設けてある。以下、前記安全装置16について説明
すると、前記ポンプケース9吐出室12の側面下部には
排液口17を設け、前記排液口17には排液管18及び
T字型の分岐管19を介して手動開閉弁20と、駆動手
段であるモータ21の駆動にて開閉されうる自動開閉弁
22とを接続してある。After the spraying operation is completed, the pump 4 automatically discharges the liquid remaining in the pump 4 to prevent damage to the pump case 9 due to freezing of the liquid.
6 is provided. Hereinafter, the safety device 16 will be described. A drain port 17 is provided at the lower part of the side surface of the discharge chamber 12 of the pump case 9, and the drain port 17 is provided with a drain pipe 18 and a T-shaped branch pipe 19. A manual opening / closing valve 20 is connected to an automatic opening / closing valve 22 which can be opened / closed by driving a motor 21 as a driving means.
【0011】前記モータ21は液体散布車1のキースイ
ッチ23と、外気温を検知しうる温度検知手段である温
度センサ24とに接続されており、前記キースイッチ2
3がOFFであって、かつ前記温度センサ24が外気温
を検出し、所定温度すなわち液体が凍結する直前の温度
まで低下したことを検知すると、前記モータ21が駆動
して自動開閉弁22が開くようになっている。The motor 21 is connected to a key switch 23 of the liquid spraying vehicle 1 and a temperature sensor 24 which is a temperature detecting means capable of detecting an outside air temperature.
When 3 is OFF and the temperature sensor 24 detects the outside air temperature and detects that the temperature has dropped to a predetermined temperature, that is, the temperature immediately before the liquid is frozen, the motor 21 is driven to open the automatic on-off valve 22. It has become.
【0012】前記モータ21には自動開閉弁22が開い
たことを検知して作動するタイマ25を接続してあり、
前記タイマ25にて自動開閉弁22が開いた後、所定時
間経過するとモータ21を駆動させて自動開閉弁22を
閉鎖するようにしてある。尚、本実施の形態では手動開
閉弁を設けてあるが、自動開閉弁のみにしても同様の作
用効果を有するものである。A timer 25 is connected to the motor 21 and operates when the automatic opening / closing valve 22 is opened.
After a predetermined time has elapsed after the automatic opening / closing valve 22 is opened by the timer 25, the motor 21 is driven to close the automatic opening / closing valve 22. In this embodiment, a manual opening / closing valve is provided. However, even if only an automatic opening / closing valve is provided, the same operation and effect can be obtained.
【0013】また本実施の形態では自動開閉弁を温度セ
ンサ、キースイッチ及びタイマとに接続してあるが、少
なくとも温度センサを設け、ポンプ内に残留する液体を
排出して液体の凍結によるポンプの破損を防止するとい
う効果が達成されれば良い。また本実施の形態では温度
検知手段にて外気温を検知するようにしてあるが、ポン
プケースの温度またはポンプケース内の液体温度を検知
するようにしても同様の作業効果を有するものである。In this embodiment, the automatic opening / closing valve is connected to a temperature sensor, a key switch, and a timer. At least a temperature sensor is provided to discharge the liquid remaining in the pump and to operate the pump by freezing the liquid. What is necessary is just to achieve the effect of preventing breakage. In the present embodiment, the outside air temperature is detected by the temperature detecting means. However, the same working effect can be obtained by detecting the temperature of the pump case or the temperature of the liquid in the pump case.
【0014】また本実施の形態では走行路面を清掃する
液体散布車に安全装置を設けてあるが、街路樹に散水す
る液体散布車に安全装置を設けても同様の作業効果を有
するものである。さらに本発明は、本実施の形態に限定
されるものではなく、ポンプ、散布手段の具体的構造に
ついては、発明の要旨の範囲内で種々の応用、変形を加
えることは可能である。Further, in this embodiment, the safety device is provided on the liquid spray vehicle for cleaning the traveling road surface. However, the same work effect can be obtained even if the safety device is provided on the liquid spray vehicle for watering the street trees. . Furthermore, the present invention is not limited to this embodiment, and various applications and modifications can be made to the specific structures of the pump and the spraying means within the scope of the invention.
【0015】本発明は前記の如き構成で、次に作用につ
いて説明する。まず、走行路面に液体を散布する際は、
ポンプ4を駆動させてタンク3内に収容された液体を吐
出管6、散布管7を介して散布ノズル8から走行路面に
液体を散布する。その際、キースイッチ23はONの状
態にあるため、仮に温度センサ24が所定温度を検知し
ても自動開閉弁22は閉鎖状態に保持されることからポ
ンプケース9内の液体が排液口17から排出されること
はない。The operation of the present invention having the above-described configuration will now be described. First, when spraying liquid on the road surface,
By driving the pump 4, the liquid stored in the tank 3 is sprayed from the spray nozzle 8 via the discharge pipe 6 and the spray pipe 7 onto the traveling road surface. At this time, since the key switch 23 is in the ON state, even if the temperature sensor 24 detects a predetermined temperature, the automatic on-off valve 22 is maintained in the closed state. Will not be discharged from
【0016】散布作業が終了すると、ポンプ4を停止さ
せて液体の供給を停止させ、手動開閉弁20を開いてポ
ンプケース9内に残留した液体を外部に排出する。これ
によりポンプケース9内に液体が残留することがないの
で、液体の凍結によるポンプケース9の破損を防止する
ことができる。次にポンプケース9内の液体を排出する
排液作業を忘れた場合について説明する。When the spraying operation is completed, the pump 4 is stopped to stop the supply of the liquid, and the manual opening / closing valve 20 is opened to discharge the liquid remaining in the pump case 9 to the outside. As a result, no liquid remains in the pump case 9, so that damage to the pump case 9 due to freezing of the liquid can be prevented. Next, a case where the drainage operation for discharging the liquid in the pump case 9 is forgotten will be described.
【0017】作業終了後、キースイッチ23をOFFに
するとモータ21が駆動可能な状態となる。その後、夜
間になり外気温が低下して所定温度に達すると、温度セ
ンサ24がその温度を検知してモータ21を駆動させて
自動開閉弁22が開く。するとポンプケース9内の液体
は排液口17から排液管18を介して外部に排出され
る。そしてタイマ25にて自動開閉弁22が開いた後、
所定時間が経過すると自動開閉弁22は閉鎖される。After the work is completed, when the key switch 23 is turned off, the motor 21 can be driven. Then, at night, when the outside air temperature decreases and reaches a predetermined temperature, the temperature sensor 24 detects the temperature and drives the motor 21 to open the automatic on-off valve 22. Then, the liquid in the pump case 9 is discharged from the drain port 17 to the outside via the drain pipe 18. After the automatic opening / closing valve 22 is opened by the timer 25,
When a predetermined time has elapsed, the automatic on-off valve 22 is closed.
【0018】これにより散布作業終了後に排液作業を忘
れても、自動開閉弁22が自動的に開いてポンプケース
9内に残留した液体が排出されるため、液体の凍結によ
るポンプケース9の破損を確実に防止することができ
る。またタイマ25にて所定時間経過後、自動開閉弁2
2を閉鎖するようにしたので、次回散布作業時に、ポン
プケース9内に吸引された液体が排液口17から外部に
洩れるのを防止することができる。Thus, even if the draining operation is forgotten after the spraying operation is completed, the automatic opening / closing valve 22 is automatically opened and the liquid remaining in the pump case 9 is discharged. Can be reliably prevented. After a predetermined time elapses with the timer 25, the automatic on-off valve 2
Since the nozzle 2 is closed, it is possible to prevent the liquid sucked into the pump case 9 from leaking to the outside from the drain port 17 at the time of the next spraying operation.
【0019】[0019]
【発明の効果】以上の如く本発明は、タンク内の液体を
圧送するポンプに排液口を設け、前記排液口に駆動手段
の駆動にて排液口を開放しうる自動開閉弁を設け、外気
温等を検知しうる温度検知手段にて所定温度を検知する
と、駆動手段を駆動させ自動開閉弁を開いてポンプ内に
残留した液体を排出するようにしたので、ポンプ内の液
体の排出を忘れたとしても、液体の凍結によるポンプの
破損を確実に防止することができる。As described above, according to the present invention, a pump for pumping liquid in a tank is provided with a drain port, and the drain port is provided with an automatic opening / closing valve capable of opening the drain port by driving a driving means. When the predetermined temperature is detected by the temperature detecting means capable of detecting the outside air temperature, the driving means is driven to open the automatic opening / closing valve to discharge the liquid remaining in the pump. Even if the operator forgets, the pump can be reliably prevented from being damaged due to freezing of the liquid.
【図1】本発明の液体散布車を示す全体側面図である。FIG. 1 is an overall side view showing a liquid sprayer according to the present invention.
【図2】図1のA−A図である。FIG. 2 is an AA diagram of FIG.
【図3】図2のB−B拡大断面図である。FIG. 3 is an enlarged sectional view taken along line BB of FIG. 2;
1 液体散布車 2 車体 3 タンク 4 ポンプ 8 散布ノズル(散布手段) 16 安全装置 17 排液口 21 モータ(駆動手段) 22 自動開閉弁 24 温度センサ(温度検知手段) DESCRIPTION OF SYMBOLS 1 Liquid spraying vehicle 2 Body 3 Tank 4 Pump 8 Spraying nozzle (spraying means) 16 Safety device 17 Drainage port 21 Motor (driving means) 22 Automatic open / close valve 24 Temperature sensor (temperature detecting means)
Claims (1)
はタンク内の液体を圧送しうるポンプを設け、前記ポン
プには散布手段を接続してポンプにより圧送された液体
を散布手段から散布するようにした液体散布車におい
て、前記ポンプにはポンプ内に残留した液体を排出しう
る排液口を設け、前記排液口には、駆動手段の駆動にて
排液口を開放しうる自動開閉弁を設け、前記駆動手段に
は、外気温等の所定温度を検知すると駆動手段を駆動さ
せうる温度検知手段を設けたことを特徴とする液体散布
車におけるポンプの安全装置。1. A tank is mounted on a vehicle body, a pump capable of pumping liquid in the tank is provided in the tank, and a spraying means is connected to the pump to spray the liquid pumped by the pump from the spraying means. In the liquid spraying vehicle, the pump is provided with a drain port capable of discharging liquid remaining in the pump, and the drain port is provided with an automatic drain which can be opened by driving a driving unit. A safety device for a pump in a liquid spraying vehicle, comprising: an on-off valve; and a temperature detecting means for driving the driving means when a predetermined temperature such as an outside air temperature is detected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP09924398A JP3740277B2 (en) | 1998-04-10 | 1998-04-10 | Pump safety device in liquid sprayer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP09924398A JP3740277B2 (en) | 1998-04-10 | 1998-04-10 | Pump safety device in liquid sprayer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11290739A true JPH11290739A (en) | 1999-10-26 |
JP3740277B2 JP3740277B2 (en) | 2006-02-01 |
Family
ID=14242266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP09924398A Expired - Fee Related JP3740277B2 (en) | 1998-04-10 | 1998-04-10 | Pump safety device in liquid sprayer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3740277B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002336750A (en) * | 2001-05-11 | 2002-11-26 | Shin Meiwa Ind Co Ltd | Liquid spray vehicle |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61106508U (en) * | 1984-12-19 | 1986-07-07 | ||
JPH0610395A (en) * | 1992-06-23 | 1994-01-18 | Matsushita Electric Works Ltd | Automatic freezing prevention device for hot water washing toilet seat unit |
-
1998
- 1998-04-10 JP JP09924398A patent/JP3740277B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61106508U (en) * | 1984-12-19 | 1986-07-07 | ||
JPH0610395A (en) * | 1992-06-23 | 1994-01-18 | Matsushita Electric Works Ltd | Automatic freezing prevention device for hot water washing toilet seat unit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002336750A (en) * | 2001-05-11 | 2002-11-26 | Shin Meiwa Ind Co Ltd | Liquid spray vehicle |
Also Published As
Publication number | Publication date |
---|---|
JP3740277B2 (en) | 2006-02-01 |
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