JP2520469Y2 - Diaphragm pump - Google Patents
Diaphragm pumpInfo
- Publication number
- JP2520469Y2 JP2520469Y2 JP1989098127U JP9812789U JP2520469Y2 JP 2520469 Y2 JP2520469 Y2 JP 2520469Y2 JP 1989098127 U JP1989098127 U JP 1989098127U JP 9812789 U JP9812789 U JP 9812789U JP 2520469 Y2 JP2520469 Y2 JP 2520469Y2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- diaphragm
- engine
- pump
- chamber
- 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
- Reciprocating Pumps (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案はエンジンの作動圧力でダイヤフラムを振動さ
せポンプ作用をおこなうようにしたダイヤフラムポンプ
に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a diaphragm pump that vibrates a diaphragm by an operating pressure of an engine to perform a pumping action.
ダイヤフラムポンプはダイヤフラムと一対のチェック
弁で構成され、ダイヤフラムの一側に形成された圧力室
にエンジンの作動圧力を作用させることにより、該ダイ
ヤフラムを振動させ、燃料を吸入口から一方のチェック
弁を経て前記ダイヤフラムの他側に形成されるポンプ室
に吸引し、この燃料を他方のチェック弁を経て吐出口へ
圧送している。The diaphragm pump is composed of a diaphragm and a pair of check valves.By applying the operating pressure of the engine to a pressure chamber formed on one side of the diaphragm, the diaphragm is vibrated and fuel is drawn from the intake port to one check valve. After that, the fuel is sucked into a pump chamber formed on the other side of the diaphragm, and this fuel is pressure-fed to the discharge port via the other check valve.
上記ダイヤフラムポンプを駆動する作動圧力は、一般
にエンジンのクランク室圧力または吸気管圧力を利用し
ており、エンジンにバックファイヤーが発生すると前記
クランク室内および吸気管内に異常高圧が発生し、この
圧力がポンプのダイヤフラムに作用して該ダイヤフラム
の破損を招く恐れがある。The operating pressure for driving the diaphragm pump generally utilizes the crank chamber pressure or the intake pipe pressure of the engine, and when a backfire occurs in the engine, an abnormally high pressure is generated in the crank chamber and the intake pipe. There is a possibility that the diaphragm may be acted upon and the diaphragm may be damaged.
本考案はダイヤフラムにバックファイヤーの異常高圧
が作用しないようにして、該ダイヤフラムの破損を防止
することを目的とする。An object of the present invention is to prevent the diaphragm from being damaged by the abnormally high pressure of the backfire so as to prevent the diaphragm from being damaged.
本考案は、エンジンの作動圧力をポンプ室に導く圧力
通路の途中に、ダイヤフラムにより前記作動圧力を感知
し、該圧力通路にエンジンのバックファイヤーによる異
常高圧が発生したときに、該圧力通路を閉じる安全弁を
設けることを特徴とする。The present invention detects the working pressure by a diaphragm in the middle of the pressure passage for guiding the working pressure of the engine to the pump chamber, and closes the pressure passage when an abnormally high pressure due to the backfire of the engine occurs in the pressure passage. It is characterized by providing a safety valve.
エンジンの運転中は、作動圧力が圧力通路を通り、前
記安全弁を経てポンプ室に導入され燃料ポンプが駆動さ
れる。この通常のエンジン作動圧力では、安全弁のダイ
ヤフラムは移動されず安全弁は圧力通路を開いた状態に
保つ。During operation of the engine, the working pressure passes through the pressure passage, is introduced into the pump chamber through the safety valve, and the fuel pump is driven. At this normal engine operating pressure, the safety valve diaphragm is not moved and the safety valve keeps the pressure passage open.
エンジンの作動圧力がバックファイヤーにより規定圧
力以上の高圧になると、この異常高圧をダイヤフラムが
受け、すばやく移動して安全弁を閉じ圧力通路を遮断す
る。その結果ポンプのダイヤフラムにバックファイヤー
発生時の異常高圧が作用せず該ダイヤフラムの破損を防
止することができる。When the operating pressure of the engine becomes higher than the specified pressure by the backfire, the diaphragm receives this abnormally high pressure and moves quickly to close the safety valve and shut off the pressure passage. As a result, the diaphragm of the pump is prevented from being damaged by the abnormal high pressure when a backfire occurs.
以下図面により本考案の一実施例を説明する。 An embodiment of the present invention will be described below with reference to the drawings.
１はダイヤフラムポンプであり、該ポンプ１はダイヤ
フラム２と一対のチェック弁３、４とを備える。ダイヤ
フラム２の一側には圧力室５、他側にはポンプ室６が形
成され、前記圧力室５にエンジンのクランク室圧力また
は吸気管圧力等の作動圧力を作用させることによりダイ
ヤフラム２を振動させ、ポンプ室６の容積が増減され
る。このポンプ室６の容積の増減により燃料を吸入口７
から一方のチェック弁３を経てポンプ室６に吸引し、こ
の燃料を他方のチェック弁４を経て吐出口８へ圧送す
る。Reference numeral 1 is a diaphragm pump, and the pump 1 includes a diaphragm 2 and a pair of check valves 3 and 4. A pressure chamber 5 is formed on one side of the diaphragm 2 and a pump chamber 6 is formed on the other side, and the diaphragm 2 is vibrated by applying an operating pressure such as a crank chamber pressure of the engine or an intake pipe pressure to the pressure chamber 5. The volume of the pump chamber 6 is increased or decreased. By increasing or decreasing the volume of the pump chamber 6, the fuel is sucked into the suction port 7
Is sucked into the pump chamber 6 through the one check valve 3 and is pumped to the discharge port 8 through the other check valve 4.
10は圧力室５にエンジンの作動圧力を導く圧力通路11
上に設けられる安全弁であり、バックファイヤーにより
作動圧力が異常高圧になると該安全弁10が圧力通路11を
閉じる。この安全弁10は圧力通路11の圧力を受圧するダ
イヤフラム13と、該ダイヤフラム13に連通され前記圧力
通路11上に配設されるバルブ14と、ダイヤフラム13背部
に形成される大気室15に配設され、該ダイヤフラム13を
バルブ14が圧力通路11を開く方向に常時遍倚させる弾発
バネ16とで構成される。Reference numeral 10 is a pressure passage 11 that guides the operating pressure of the engine to the pressure chamber 5.
This is a safety valve provided above, and when the working pressure becomes abnormally high due to the backfire, the safety valve 10 closes the pressure passage 11. The safety valve 10 is provided with a diaphragm 13 for receiving the pressure of the pressure passage 11, a valve 14 communicating with the diaphragm 13 and arranged on the pressure passage 11, and an atmosphere chamber 15 formed at the back of the diaphragm 13. , A resilient spring 16 that causes the diaphragm 13 to constantly move in the direction in which the valve 14 opens the pressure passage 11.
従って、エンジンのバックファイヤーの発生により圧
力通路11内が異常高圧になるとダイヤフラム13が弾発バ
ネ16の作用力に抗してすばやく移動し、バルブ14が圧力
通路11を閉じる。その結果、圧力室５にバックファイヤ
ー時の異常高圧が作用せず、ポンプのダイヤフラム13の
破損を防止できる。Therefore, when the pressure in the pressure passage 11 becomes abnormally high due to the occurrence of engine backfire, the diaphragm 13 moves quickly against the acting force of the elastic spring 16, and the valve 14 closes the pressure passage 11. As a result, the abnormal high pressure during backfire does not act on the pressure chamber 5, and damage to the diaphragm 13 of the pump can be prevented.
20はエンジン、21はクランク室である。 20 is an engine and 21 is a crankcase.
以上詳述したように本考案によれば、エンジンの作動
圧力をポンプ室に導く圧力通路の途中に、ダイヤフラム
により前記作動圧力を感知し、該圧力通路にエンジンの
バックファイヤーによる異常高圧が発生したときに、該
圧力通路を閉じる安全弁を設けることにより、エンジン
の作動圧力がバックファイヤーにより規定圧力以上の高
圧になると、この異常高圧をダイヤフラムが受け、すば
やく移動して安全弁を閉じ圧力通路を遮断するので、前
記ポンプのダイヤフラムの破損を防止することができ
る。As described above in detail, according to the present invention, the operating pressure is sensed by the diaphragm in the pressure passage for guiding the operating pressure of the engine to the pump chamber, and an abnormally high pressure is generated in the pressure passage by the backfire of the engine. At this time, by providing a safety valve that closes the pressure passage, when the operating pressure of the engine becomes higher than the specified pressure by the backfire, the diaphragm receives this abnormal high pressure and moves quickly to close the safety valve and shut off the pressure passage. Therefore, damage to the diaphragm of the pump can be prevented.
図は本考案ダイヤフラムポンプの一実施例を示す説明図
である。 ２……ダイヤフラム、５……圧力室、６……ポンプ室、
10……安全弁、13……ダイヤフラム、14……バルブ。FIG. 1 is an explanatory view showing an embodiment of the diaphragm pump of the present invention. 2 ... diaphragm, 5 ... pressure chamber, 6 ... pump chamber,
10 …… Safety valve, 13 …… Diaphragm, 14 …… Valve.
Claims (1)
させてポンプ作用をおこなうようにしたダイヤフラムポ
ンプにおいて、前記作動圧力をポンプ室に導く圧力通路
の途中に、ダイヤフラムにより前記作動圧力を感知し、
該圧力通路にエンジンのバックファイヤーによる異常高
圧が発生したときに、該圧力通路を閉じる安全弁を設け
ることを特徴とするダイヤフラムポンプ。1. A diaphragm pump in which a diaphragm is oscillated by an operating pressure of an engine to perform a pumping action, the operating pressure is sensed by the diaphragm in the middle of a pressure passage for guiding the operating pressure to a pump chamber,
A diaphragm pump comprising a safety valve for closing the pressure passage when an abnormally high pressure occurs due to an engine backfire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989098127U JP2520469Y2 (en) | 1989-08-23 | 1989-08-23 | Diaphragm pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989098127U JP2520469Y2 (en) | 1989-08-23 | 1989-08-23 | Diaphragm pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0337270U JPH0337270U (en) | 1991-04-11 |
| JP2520469Y2 true JP2520469Y2 (en) | 1996-12-18 |
Family
ID=31647241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989098127U Expired - Lifetime JP2520469Y2 (en) | 1989-08-23 | 1989-08-23 | Diaphragm pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2520469Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5041389Y2 (en) * | 1971-04-23 | 1975-11-25 | ||
| JPS63193770U (en) * | 1987-05-30 | 1988-12-13 |
-
1989
- 1989-08-23 JP JP1989098127U patent/JP2520469Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0337270U (en) | 1991-04-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6772738B2 (en) | Injection system for internal combustion engines with improved starting properties | |
| JP3428443B2 (en) | Variable flow high pressure fuel pump and fuel supply control method | |
| US6901912B1 (en) | Variable delivery fuel supply device | |
| JP2001248515A (en) | Variable delivery rate fuel supplying system | |
| JP2520469Y2 (en) | Diaphragm pump | |
| JP2001248527A (en) | Variable discharge rate fuel supplying device | |
| JP2520468Y2 (en) | Diaphragm pump | |
| JPH1193797A (en) | Fuel injection pump | |
| JP2000034980A (en) | Booster compressor | |
| JP2860519B2 (en) | Engine stop device for diesel engine | |
| JP2003247474A (en) | High pressure fuel pump | |
| US3905428A (en) | Fuel stop means for a diesel pile hammer | |
| JP2000008996A (en) | Fuel pump and fuel injection device | |
| JP2515669B2 (en) | Vacuum pump | |
| JP2538214Y2 (en) | Delivery valve device for fuel injection pump | |
| JP2002054531A (en) | Piston type high pressure pump | |
| JPH0740685Y2 (en) | Membrane fuel pump device for engine | |
| US4715789A (en) | High speed hydraulic fluid venting valve in a hydraulic fluid pump | |
| JP3715351B2 (en) | Reciprocating pump | |
| JPH057513Y2 (en) | ||
| JPH05296153A (en) | Diaphgram pump | |
| JP2003003962A (en) | Diaphragm pump | |
| KR100411067B1 (en) | In diesel engine, apparatus make certain fuel injection timing | |
| JPS608144Y2 (en) | Abnormal noise prevention device for fuel piping system | |
| JPH0244070Y2 (en) |