JPS63150089U

JPS63150089U -

Info

Publication number: JPS63150089U
Application number: JP4240387U
Authority: JP
Priority date: 1987-03-23
Filing date: 1987-03-23
Publication date: 1988-10-03

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案にかゝる往復動ポンプの一実施
例の要部の縦断面図、第２図は往復動ポンプの吸
込通路内の液体の脈動を示すグラフ、第３図は従
来例の往復動ポンプの縦断面図である。１……シリンダ、２……シリンダ室、３……吸
込通路、４……吐出通路、５……プランジヤ、６
……シール材、１２……吸込弁体、１３……吐出
弁体、１４……空室、１６……バイパス通路。 Fig. 1 is a vertical cross-sectional view of the essential parts of an embodiment of the reciprocating pump according to the present invention, Fig. 2 is a graph showing the pulsation of liquid in the suction passage of the reciprocating pump, and Fig. 3 is a conventional example. FIG. 3 is a longitudinal sectional view of a reciprocating pump. 1...Cylinder, 2...Cylinder chamber, 3...Suction passage, 4...Discharge passage, 5...Plunger, 6
... Seal material, 12 ... Suction valve body, 13 ... Discharge valve body, 14 ... Vacancy, 16 ... Bypass passage.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

シリンダ室２と、吸込通路３及び吐出通路４を
もつたシリンダ１に、プランジヤ５を往復動自由
に支持すると共に、前記シリンダ室２とプランジ
ヤ５との間にシール材６を介装する一方、前記吸
込通路３を開閉する吸込弁体１２と、前記吐出通
路４を開閉する吐出弁体１３とを設け、前記プラ
ンジヤ５の往復動により前記吸込弁体１２及び吐
出弁体１３を作動させる如く成した往復動ポンプ
であつて、前記シール材６の中間部に、前記プラ
ンジヤ５の外周面に臨む空室１４を形成すると共
に、前記吸込通路３における前記吸込弁体１２よ
りも入口側部位にバイパス通路１６を接続して、
該バイパス通路１６を前記空室１４に連通させ、
前記吸込弁体１２の閉動作時、前記吸込通路３内
の液体を前記空室１４内に供給するようにしたこ
とを特徴とする往復動ポンプ。 A plunger 5 is freely supported in a cylinder 1 having a cylinder chamber 2, a suction passage 3, and a discharge passage 4 in a reciprocating manner, and a sealing material 6 is interposed between the cylinder chamber 2 and the plunger 5. A suction valve body 12 for opening and closing the suction passage 3 and a discharge valve body 13 for opening and closing the discharge passage 4 are provided, and the suction valve body 12 and the discharge valve body 13 are actuated by the reciprocating motion of the plunger 5. In this reciprocating pump, a cavity 14 facing the outer circumferential surface of the plunger 5 is formed in the middle part of the sealing material 6, and a bypass is provided in a part of the suction passage 3 closer to the inlet than the suction valve body 12. Connect the passage 16,
communicating the bypass passage 16 with the cavity 14;
A reciprocating pump characterized in that the liquid in the suction passage 3 is supplied into the cavity 14 when the suction valve body 12 is closed.