WO2017046861A1 - 逆止弁及び送液ポンプ - Google Patents
逆止弁及び送液ポンプ Download PDFInfo
- Publication number
- WO2017046861A1 WO2017046861A1 PCT/JP2015/076080 JP2015076080W WO2017046861A1 WO 2017046861 A1 WO2017046861 A1 WO 2017046861A1 JP 2015076080 W JP2015076080 W JP 2015076080W WO 2017046861 A1 WO2017046861 A1 WO 2017046861A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- valve body
- liquid
- valve seat
- check valve
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B7/00—Piston machines or pumps characterised by having positively-driven valving
- F04B7/0076—Piston machines or pumps characterised by having positively-driven valving the members being actuated by electro-magnetic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/20—Other positive-displacement pumps
- F04B19/22—Other positive-displacement pumps of reciprocating-piston type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1002—Ball valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1087—Valve seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
- F16K15/182—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
- F16K15/1823—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism for ball check valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
- F16K31/082—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet using a electromagnet and a permanent magnet
Definitions
- the present invention relates to a check valve that prevents backflow of liquid and a liquid feed pump that sucks and discharges liquid by reciprocating a plunger in one direction.
- a liquid feed pump that feeds liquid by reciprocating a plunger in one direction includes a check valve that prevents backflow of liquid at the inlet and outlet of the pump chamber.
- a general check valve has a spherical valve body provided so as to be movable in the liquid flow direction, and a valve seat on which the valve body is seated.
- the valve seat is a hollow cylindrical member through which liquid flows. The liquid flow path is closed by seating a spherical valve body on the edge of the opening of the valve seat.
- the pump chamber becomes a positive pressure (a state higher than the atmospheric pressure), and the pump chamber The valve body is pushed to the valve seat side by the pressure on the chamber side and is seated.
- the suction direction when the plunger is driven in the direction in which it is pulled out from the pump chamber (hereinafter referred to as the suction direction), the pump chamber becomes negative pressure (a state lower than the atmospheric pressure), and the negative pressure causes the valve body to move to the pump chamber. It is attracted to the side and leaves the valve seat.
- the check valve on the outlet side of the pump chamber operates in the opposite manner.
- the valve body and the valve seat are adsorbed due to adhesion of dirt on the valve body surface or the contact surface between the valve body and the valve seat.
- the check valve on the inlet side cannot be opened only by the negative pressure generated in the pump head at the time of pump suction, and liquid feeding failure may occur.
- valve body even when the valve body is actively operated, for example, there may be a problem that the valve body does not normally seat on the valve seat due to the presence of air bubbles or foreign matter, and the valve does not completely close. .
- valve opening / closing mechanism there are one comprising a first valve body and a first valve seat and one comprising a second valve body and a second valve seat. Even when one of the opening / closing mechanisms is not closed due to bubbles or the like, the valve can be closed by the other opening / closing mechanism. Thereby, the reliability at the time of closing the valve of a check valve improves.
- the first valve body and the second valve body may be members of the same shape made of the same material, and the first valve seat and the second valve seat may be members of the same shape made of the same material. If it does so, a 1st valve body and a 2nd valve body, a 1st valve seat, and a 2nd valve seat can be comprised by the same member, and reduction of manufacturing cost can be aimed at.
- the cross head 12a is urged to the opposite side to the pump head 4a by the elastic member 16a, and has a cam follower 14a at the end opposite to the pump head 4a.
- the cam follower 14a is in contact with the peripheral surface of the eccentric cam 18a.
- the cross head 12b is biased by the elastic member 16b to the side opposite to the pump head 4b, and includes a cam follower 14b at the end opposite to the pump head 4b.
- the cam follower 14b is in contact with the peripheral surface of the eccentric cam 18b.
- the elastic members 16a and 16b are, for example, coil springs.
- the flow path 30 (liquid inlet flow path) is connected to the liquid inlet of the pump head 4a via the inlet check valve 32.
- the channel 30 communicates with a container 38 that stores the liquid.
- One end of a flow path 34 (liquid outlet flow path) is connected to a liquid outlet of the pump head 4a via an outlet check valve 36.
- the other end of the flow path 34 is connected to the liquid inlet of the pump head 4b.
- a flow path 40 is connected to the liquid outlet of the pump head 4b.
- the plunger 10a When the plunger 10a is driven in the discharge direction, the plunger 10b is driven in the suction direction, the inlet side check valve 32 is closed, and the outlet side check valve 36 is opened. Thereby, the liquid in the pump chamber 8a is discharged to the pump chamber 8b side through the flow path 34, and the liquid is sent through the flow path 40 while the pump chamber 8b is filled with the liquid. At this time, a flow rate obtained by subtracting the suction flow rate of the liquid feed pump 2b from the discharge flow rate of the liquid feed pump 2a becomes the liquid feed flow rate of the liquid feed device.
- the plunger capacity of the pump head 4a is about twice the plunger capacity of the pump head 4b, and the plungers 10a and 10b are driven 180 degrees out of phase, so that the liquid flow rate in the flow path 40 is kept constant. It is like that.
- the pin 64 is inserted between the balls 52 and 56 which are valve bodies so that the ball 56 is actively pushed up together with the ball 52 when the operating part 60 is lifted. Further, it is possible to increase the reliability when opening the valve while increasing the reliability when closing the valve by using a two-stage valve opening / closing mechanism.
Abstract
Description
4a,4b ポンプヘッド
6a,6b ポンプボディ
8a,8b ポンプ室
10a,10b プランジャ
12a,12b クロスヘッド
14a,14b カムフォロワ
16a,16b 弾性部材
18a,18b カム
20 ステッピングモータ
22 駆動軸
30 流路(液入口流路)
32 入口側逆止弁
34 流路(液出口流路)
36 出口側逆止弁
42 バルブボディ
44 ハウジング
46 液入口
47 液出口
48 シリンダ部
49 ガスケット
50 ボールシート(第1弁座)
52 ボール(第1弁体)
53 スペーサ
54 ボールシート(第2弁座)
56 ボール(第2弁体)
58 永久磁石
60 作動部
62 ピン(第1駆動体)
64 ピン(第2駆動体)
66 オモリ
68 弾性部材
70 駆動機構
72 鉄心
74 コイル
Claims (8)
- 液を流入させる液入口と液を流出させる液出口を有し、一方向へ液を流す直線流路と、
前記一方向への可動性をもって前記直線流路内に設けられた第1弁体と、
前記第1弁体よりも前記液入口側に設けられ、内側に前記直線流路の一部をなす流路を有し、その流路の前記液出口側の開口を塞ぐように前記第1弁体を着座させる第1弁座と、
前記一方向への可動性をもって前記直線流路内における前記第1弁体よりも前記液出口側に設けられた第2弁体と、
前記第2弁体よりも前記液入口側で前記第1弁体よりも前記液出口側に設けられ、内側に前記直線流路の一部をなす流路を有し、その流路の前記液出口側の開口を塞ぐように前記第2弁体を着座させる第2弁座と、
前記直線流路内における前記第1弁体よりも前記液入口側において前記一方向への可動性をもって設けられた第1駆動体と、
前記第1駆動体を前記一方向へ駆動し、前記第1駆動体を、前記第1弁体を前記液出口側へ押圧して前記第1弁体を前記第1弁座から離脱させる開状態、又は前記第1弁体を前記液出口側へ押圧せずに前記第1弁体を前記第1弁座に着座させる閉状態のいずれか一方の状態にする駆動機構と、
前記直線流路内における前記第1弁体と前記第2弁体の間に前記一方向への可動性をもって設けられ、前記第1駆動体が前記開状態になるときに前記第1弁体によって前記液出口側へ押圧され、それに伴って前記第2弁体を前記液出口側へ押圧して前記第2弁体を前記第2弁座から離脱させ、前記第1駆動体が前記閉状態になるときに前記第2弁体から離れて前記第2弁体を前記第2弁座に着座させる第2駆動体と、を備えた逆止弁。 - 前記第2駆動体は、前記第1弁座に着座した前記第1弁体と前記第2弁座に着座した前記第2弁体との間の距離よりも短いピンである請求項1に記載の逆止弁。
- 前記第2駆動体は、その軸方向が前記一方向を向いた状態を維持するように前記第2弁座によって支持されている請求項2に記載の逆止弁。
- 前記第2弁座の内側流路はその流れ方向に対して垂直な方向における断面が円形であり、
前記第2駆動体の断面形状は、軸方向に対して垂直な方向において、前記第2弁座の内側流路の内径と略同一の外径を有する円形の一部が欠損した形状である請求項3に記載の逆止弁。 - 前記第2駆動体は前記第2弁座と同一の材質により構成されている請求項3に記載の逆止弁。
- 前記第1弁体と前記第2弁体は同一材質からなる同一形状の部材であり、前記第1弁座と前記第2弁座は同一材質からなる同一形状の部材である請求項1から5のいずれか一項に記載の逆止弁。
- 前記液出口側から前記液入口側へ前記第2弁体を押圧する押圧部材を備えている請求項1に記載の逆止弁。
- ポンプ室と、
前記ポンプ室に液を流入させる液入口流路と、
前記ポンプ室から液を流出させる液出口流路と、
前記ポンプ室に先端が挿入されたプランジャと、
前記プランジャをその軸方向に駆動するプランジャ駆動機構と、
前記液入口流路上に設けられ前記ポンプ室から液を吐出する際の前記液入口流路における液の逆流を防止する入口側逆止弁と、
前記液出口流路上に設けられ前記ポンプ室に液を吸入する際の前記液出口流路における液の逆流を防止する出口側逆止弁と、を備え、
前記入口側逆止弁及び前記出口側逆止弁のうち少なくとも一方が請求項1から7のいずれか一項に記載の逆止弁である送液ポンプ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2015/076080 WO2017046861A1 (ja) | 2015-09-15 | 2015-09-15 | 逆止弁及び送液ポンプ |
US15/737,765 US10648582B2 (en) | 2015-09-15 | 2015-09-15 | Check valve and liquid delivery pump |
JP2017540368A JP6424965B2 (ja) | 2015-09-15 | 2015-09-15 | 逆止弁及び送液ポンプ |
CN201580081153.6A CN107709860B (zh) | 2015-09-15 | 2015-09-15 | 止回阀以及送液泵 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2015/076080 WO2017046861A1 (ja) | 2015-09-15 | 2015-09-15 | 逆止弁及び送液ポンプ |
Publications (1)
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WO2017046861A1 true WO2017046861A1 (ja) | 2017-03-23 |
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PCT/JP2015/076080 WO2017046861A1 (ja) | 2015-09-15 | 2015-09-15 | 逆止弁及び送液ポンプ |
Country Status (4)
Country | Link |
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US (1) | US10648582B2 (ja) |
JP (1) | JP6424965B2 (ja) |
CN (1) | CN107709860B (ja) |
WO (1) | WO2017046861A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019130625A1 (ja) * | 2017-12-25 | 2019-07-04 | 株式会社島津製作所 | 送液装置 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019161262A1 (en) * | 2018-02-15 | 2019-08-22 | Jacobsen Innovations, Inc. | Pump |
EP4244507A1 (en) | 2021-01-11 | 2023-09-20 | Waters Technologies Corporation | Active check valve having a moving magnet actuator |
Citations (5)
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JPH01247878A (ja) * | 1988-02-13 | 1989-10-03 | Hewlett Packard Co <Hp> | 弁ユニット |
JPH09292381A (ja) * | 1996-04-26 | 1997-11-11 | Shimadzu Corp | 送液ポンプ |
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JP2001235052A (ja) * | 2000-02-21 | 2001-08-31 | Shimadzu Corp | 弁ユニット及びそれを用いた送液ポンプ |
JP2006250835A (ja) * | 2005-03-14 | 2006-09-21 | Shimadzu Corp | 液体クロマトグラフ用送液ポンプ |
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2015
- 2015-09-15 WO PCT/JP2015/076080 patent/WO2017046861A1/ja active Application Filing
- 2015-09-15 CN CN201580081153.6A patent/CN107709860B/zh active Active
- 2015-09-15 JP JP2017540368A patent/JP6424965B2/ja active Active
- 2015-09-15 US US15/737,765 patent/US10648582B2/en active Active
Patent Citations (5)
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JPH01247878A (ja) * | 1988-02-13 | 1989-10-03 | Hewlett Packard Co <Hp> | 弁ユニット |
US6007314A (en) * | 1996-04-01 | 1999-12-28 | Nelson, Ii; Joe A. | Downhole pump with standing valve assembly which guides the ball off-center |
JPH09292381A (ja) * | 1996-04-26 | 1997-11-11 | Shimadzu Corp | 送液ポンプ |
JP2001235052A (ja) * | 2000-02-21 | 2001-08-31 | Shimadzu Corp | 弁ユニット及びそれを用いた送液ポンプ |
JP2006250835A (ja) * | 2005-03-14 | 2006-09-21 | Shimadzu Corp | 液体クロマトグラフ用送液ポンプ |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2019130625A1 (ja) * | 2017-12-25 | 2019-07-04 | 株式会社島津製作所 | 送液装置 |
CN111542700A (zh) * | 2017-12-25 | 2020-08-14 | 株式会社岛津制作所 | 送液装置 |
JPWO2019130625A1 (ja) * | 2017-12-25 | 2021-01-07 | 株式会社島津製作所 | 送液装置 |
CN111542700B (zh) * | 2017-12-25 | 2022-06-21 | 株式会社岛津制作所 | 送液装置 |
US11746777B2 (en) | 2017-12-25 | 2023-09-05 | Shimadzu Corporation | Liquid sending device |
Also Published As
Publication number | Publication date |
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JP6424965B2 (ja) | 2018-11-21 |
US20180313454A1 (en) | 2018-11-01 |
CN107709860B (zh) | 2019-08-20 |
CN107709860A (zh) | 2018-02-16 |
JPWO2017046861A1 (ja) | 2018-02-22 |
US10648582B2 (en) | 2020-05-12 |
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