CN102472270B - Plunger type metering pump - Google Patents
Plunger type metering pump Download PDFInfo
- Publication number
- CN102472270B CN102472270B CN200980160574.2A CN200980160574A CN102472270B CN 102472270 B CN102472270 B CN 102472270B CN 200980160574 A CN200980160574 A CN 200980160574A CN 102472270 B CN102472270 B CN 102472270B
- Authority
- CN
- China
- Prior art keywords
- pump
- pump head
- fixed block
- plunger
- tubular fixed
- 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.)
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Links
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
- 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
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
- F04B53/164—Stoffing boxes
Abstract
A plunger type metering pump is configured such that a pump head (9) is correctly mounted to a pump body (1) in a reduced time. A plunger type metering pump comprises a pump body (1) for reciprocatably supporting a plunger (2), a circular tube-like head-mounting section (82) mounted to one end of the pump body (1) and having a male thread section (83) on an outer peripheral section thereof, a pump head (9) mounted to the head mounting section (82) through a seal (4) and having a pump chamber (91) therein, and a tubular fixing device (7) mounted on the outer periphery of the pump head (9) and having on the inner peripheral surface thereof an engaging section (74) and a female thread section (72), the engaging section (74) being engaged with the pump head (9), the female thread section (72) being engaged with the male thread section (83). Because the pump head (9) is fixed to the circular tube-like head-mounting section (82), which is mounted to the pump body (1), by the single tubular fixing device (7), there is no need of consideration of the uniformity in tightening forces applied to bolts (6).
Description
Technical field
The present invention relates to a kind of by making plunger come and go to drive to carry out measuring, the plunger type metering pump of liquor charging.
Background technique
By Liquid transfer to the mechanism of analytical equipment etc., often plunger type metering pump is utilized as metering liquid.Plunger type metering pump be make plunger in pump chamber back and forth movement to carry the device of a certain amount of liquid continuously.
The exploded perspective view of the plunger type pump of existing type shown in Figure 1, its sectional view shown in Figure 2.Plunger type pump has the pump housing 1, plunger 2, pump head 3, plunger seal 4 and Sealing retainer 5, for pump head 3 being arranged on the bolt 6 etc. on the pump housing 1.In the inside of pump head 3, there is pump chamber 31, also there is the fluid intake 32 for sucking liquid in pump chamber 31 and the liquid outlet 33 for discharging liquid from pump chamber 31.Plunger seal 4 is kept by Sealing retainer 5, and it maintains the fluid tight of pump chamber 31.
When making plunger 2 come and go driving in pump chamber 31, a certain amount of liquid be prescribed is inhaled in pump chamber 31 from fluid intake 32, and is transported to analytical equipment etc.
Prior art document
Patent documentation
Patent documentation 1: Japanese Patent Laid-Open 10-103221 publication
The problem that invention will solve
In the plunger type metering pump of so existing type, pump head 3 is such as installed on the pump housing 1 by multiple fixed blocks of bolt 6 grade.Therefore, when the screwing force of multiple bolt 6 is unequal, can produce unfavorable condition as follows, namely pump head 3 is mounted obliquely within the pump housing 1, and unequal power puts on plunger seal 4 thus causes plunger seal 4 to be out of shape.The distortion of plunger seal 4 and liquid have relation from the leakage of pump chamber 31, the breakage of plunger seal 4, service life reduction.
By making the screwing force of multiple bolt 6 impartial, such problem can be avoided.But those skilled in the art carry out the tightening operation of bolt with needing significant care, the expense time is compared in the installation of pump head 3.
The present invention makes just in view of the above problems, its object is to alleviate pump head is correctly installed on work required on the pump housing.
The means of dealing with problems
Plunger type metering pump involved in the present invention, it plunger is back and forth driven in pump chamber and carries out the plunger type metering pump of liquor charging, it is characterized in that having:
The pump housing, the described pump housing supports described plunger with the form that described plunger can move back and forth;
Cylindric pump head assembly department, described pump head assembly department is arranged on an end of the described pump housing, has screw section at described pump head assembly department peripheral part;
Pump head, described pump head is installed on described pump head assembly department by Sealing, has described pump chamber in the inside of described pump head; With
Tubular fixed block, described tubular fixed block is set in the periphery of described pump head, has the hooking part engaged with described pump head and the screw section screwed with the screw section of the pump head assembly department of described cylindrical shape at the inner peripheral surface of described tubular fixed block.
Again, in above-mentioned plunger type metering pump, described pump head has the flange that described hooking part engages.
Further, in above-mentioned plunger type metering pump, described tubular fixed block has the large macropore portion of internal diameter size and the little aperture portion of internal diameter size, and described hooking part is the boundary portion in described macropore portion and described aperture portion.
The effect of invention
Adopt plunger type metering pump involved in the present invention, by single tubular fixed block, pump head is fixed on the pump head assembly department of the cylindrical shape be located on the pump housing.Therefore, different from the prior art be fixed by multiple bolt, do not need the isotropism considering screwing force.
Again, by the screw section be located on the inner peripheral surface of tubular fixed block and the screw section be located on the peripheral part of pump head assembly department are screwed, pump head is arranged on the pump housing.Therefore, do not need instrument when mounted, alleviate the work of correctly installing needed for pump head.
Accompanying drawing explanation
Fig. 1 is the exploded perspective view of existing plunger type metering pump.
Fig. 2 is the partial cross section figure of existing plunger type metering pump.
Fig. 3 is the exploded perspective view of the plunger type metering pump involved by one embodiment of the invention.
Fig. 4 is the partial cross section figure of the plunger type metering pump involved by one embodiment of the invention.
Fig. 5 is the stereogram of the fixed block involved by one embodiment of the invention.
Fig. 6 is the partial cross section figure of the plunger type metering pump involved by the first variation of the present invention.
Fig. 7 is the partial cross section figure of the plunger type metering pump involved by the second variation of the present invention.
Embodiment
Below, be described with reference to Fig. 3 ~ 5 pair embodiments of the invention.
Embodiment
Fig. 3 illustrates the exploded perspective view of the plunger type metering pump involved by the present embodiment, and Fig. 4 illustrates its sectional view, and Fig. 5 illustrates the stereogram of the fixed block involved by the present embodiment.
Pump head 9 is fixed on the pump housing 1 by single fixed block 7 by the plunger type metering pump 10 of the present embodiment, and this point and conventional example are very different.
Specifically, protuberance 8 is provided with integratedly in one end of the pump housing 1.Protuberance 8 has cylindrical portion 81 and the outside dimension large-diameter portion 82 larger than cylindrical portion 81.Large-diameter portion 82 is arranged on the top of cylindrical portion 81, is formed with external screw thread 83 in the periphery of large-diameter portion 82.Again, the recess for accommodating cylindric Sealing retainer 5 is arranged on pump head 9 side of protuberance 8.Plunger 2 can reciprocatingly be supported on the pump housing 1.The top of plunger 2 highlights from protuberance 8.
Pump head 9 is cylindric, has the flange 94 that external diameter is roughly the same with the large-diameter portion 82 of described protuberance 8 in one end.Again, recess and pump chamber 91 for accommodating Sealing retainer 5 are arranged on the inside of pump head 9.Further, pump head 9 has the fluid intake 92 for sucking liquid in pump chamber 91 and the liquid outlet 93 for discharging liquid from pump chamber 91.
Sealing retainer 5 is cylindric, and have the through hole 51 extended in the axial direction, plunger seal 4 is maintained at pump head 9 side of Sealing retainer 5.Plunger seal 4 is in convex, and its convex side is towards pump housing side.
Fixed block 7 is in nut type, and centre has through hole wherein.This through hole has the larger macropore portion 71 of internal diameter size and the less aperture portion 73 of internal diameter size.The internal diameter in macropore portion 71 is set more slightly bigger than the external diameter of large-diameter portion 82, cuts the female thread 72 screwed mutually with described external screw thread 83 at the inner peripheral surface in macropore portion 71.The thickness not being provided with the part of female thread 72 in macropore portion 71 is set more slightly bigger than the thickness of the flange 94 of pump head 9, and the internal diameter in aperture portion 73 is set more slightly bigger than the external diameter of pump head 9.
The outer circumferential face of fixed block 7 is processed with four smooth faces, to be convenient to tighten this fixed block 7.Again, fixed block 7 is resinous, manufactured as single article.
Adopt the plunger type metering pump 10 of the present embodiment, pump head 9 is arranged on the pump housing 1 as hereafter.First, the top of plunger 2 is made to make Sealing retainer 5 embed the recess of the protuberance 8 of the pump housing 1 through the through hole 51 of Sealing retainer 5.Then, pump head 9 is installed.Specifically, the plunger 2 given prominence on the top from Sealing retainer 5 embeds the pump chamber 91 of pump head 9, Sealing retainer 5 is embedded the recess of pump head 9, makes the end abutment of flange 94 and large-diameter portion 82.
Next, insert fixed block 7 from the top of pump head 9, female thread 72 is screwed mutually with the external screw thread 83 of large-diameter portion 82.Now, macropore portion 71 abuts with the flange 94 of pump head 9 with the end difference (hereinafter referred to as end difference 74) on the border in aperture portion 73.Firmly tighten fixed block 7 until flange 94 pushes large-diameter portion 82.Thus, pump head 9 is securely fixed on protuberance 8.
Like this, owing to pump head 9 being arranged on the pump housing 1 by single fixed block 7, even if therefore do not consider tightening equilibrium of forces and pump head 9 correctly can being arranged on the pump housing 1 yet of fixed block.Therefore, the power be applied in plunger seal 4 becomes impartial, can prevent plunger seal 4 from deforming.
Again, due to fastening unwanted masterful technique, the instrument of fixed block 7, therefore the installation of pump head 9 just can easily be carried out by means of only manual working, alleviates the work of installation.
Such effect (such as more than 6mm) when the diameter of plunger 2 is larger is especially useful.This is because when the diameter of plunger 2 is larger, plunger seal 4, pump head 9 also maximize correspondingly, therefore the impact that causes of the inclination of pump head 9 is comparatively large, easily produces the problem of the distortion of plunger seal 4.
In addition, fixed block 7, when being fixed on protuberance 8 by the pump head 9 of flange 94 large for the part not arranging female thread 72 in Thickness Ratio macropore portion 71, also can use.Now, tighten fixed block 7, end difference 74 abuts with flange 94 (with reference to Fig. 6), therefore, it is possible to be fixed on protuberance 8 by pump head 9.
Again, fixed block 7 also can be applicable to the external diameter of flange 94 pump head 9 less than large-diameter portion 82.Now, because a part for the end difference 74 of fixed block 7 abuts with flange 94 (with reference to Fig. 7), therefore, it is possible to be fixed on protuberance 8 by pump head 9.
Like this, fixed block 7 involved in the present invention only with a size when flange size some different can utilize.
Above, adopt embodiment and variation to be illustrated enforcement form of the present invention, but the present invention is not limited to above-described embodiment, allows and suitably to change in the scope of aim of the present invention.Such as, the boundary dimension of the protuberance 8 of the pump housing 1 is all identical is also fine.Again, the shape of pump head 9 does not need to be all Yen tubular on the whole, as long as the part of being fixed by fixed block 7, i.e. a part for the pump housing 1 side are cylindric.At this moment, the tip portion of pump head 9 must be the size that can embed fixed block 7.
Symbol description
1 ... the pump housing
2 ... plunger
3 ... pump head
4 ... plunger seal
5 ... Sealing retainer
6 ... bolt
7 ... fixed block
8 ... protuberance
9 ... pump head
31 ... pump chamber
32 ... fluid intake
33 ... liquid outlet
51 ... through hole
71 ... macropore portion
72 ... female thread
73 ... aperture portion
74 ... end difference
81 ... cylindrical portion
82 ... large-diameter portion
83 ... external screw thread
91 ... pump chamber
92 ... liquid injection port
93 ... liquid outlet
94 ... flange.
Claims (2)
1. a plunger type metering pump, it plunger is back and forth driven in pump chamber and carries out the plunger type metering pump of liquor charging, it is characterized in that having:
The pump housing, the described pump housing supports described plunger with the form that described plunger can move back and forth;
Cylindric pump head assembly department, described pump head assembly department is arranged on an end of the described pump housing, has screw section at described pump head assembly department peripheral part;
Pump head, described pump head is installed on described pump head assembly department by Sealing, has described pump chamber in the inside of described pump head; With
Tubular fixed block, described tubular fixed block is set in the periphery of described pump head, at the inner peripheral surface of described tubular fixed block, there is the hooking part engaged with described pump head and the screw section screwed with the screw section of the pump head assembly department of described cylindrical shape, described hooking part and described tubular fixed block are integrally formed
After the screw section of the screw section of described tubular fixed block and described pump head assembly department screws installation, one section of the fluid intake of described pump head and the described pump head at liquid outlet place is exposed outside described tubular fixed block,
Described pump head has the flange that described hooking part engages,
Compared with not arranging the part of screw section in the inner peripheral surface of described tubular fixed block, the thickness of described flange is larger.
2. plunger type metering pump according to claim 1, is characterized in that, described tubular fixed block has the large macropore portion of internal diameter size and the little aperture portion of internal diameter size, and described hooking part is the boundary portion in described macropore portion and described aperture portion.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2009/003526 WO2011013162A1 (en) | 2009-07-27 | 2009-07-27 | Plunger type metering pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102472270A CN102472270A (en) | 2012-05-23 |
| CN102472270B true CN102472270B (en) | 2015-07-08 |
Family
ID=43528845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980160574.2A Active CN102472270B (en) | 2009-07-27 | 2009-07-27 | Plunger type metering pump |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20120118141A1 (en) |
| JP (1) | JPWO2011013162A1 (en) |
| CN (1) | CN102472270B (en) |
| WO (1) | WO2011013162A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104024847B (en) * | 2011-12-26 | 2017-11-21 | 株式会社岛津制作所 | Flow channel switching valve |
| US11319951B2 (en) * | 2017-11-29 | 2022-05-03 | Shimadzu Corporation | Plunger pump |
| JP2021076028A (en) * | 2019-11-05 | 2021-05-20 | シナノケンシ株式会社 | Plunger pump |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS588277A (en) * | 1981-07-06 | 1983-01-18 | Noboru Kimura | Plunger type metering pump |
| CN1372480A (en) * | 2000-05-01 | 2002-10-02 | 巴克斯特国际公司 | Linearly motile infusion pump |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2056936A (en) * | 1934-06-01 | 1936-10-13 | Irving M Hayward | Motor-pump unit |
| US4915591A (en) * | 1986-01-08 | 1990-04-10 | Saphirwerk Industrieprodukte Ag | Reciprocating pump and control using outlet valve position sensors |
| DE8912315U1 (en) * | 1989-10-17 | 1989-11-30 | Hewlett-Packard Gmbh, 7030 Boeblingen, De | |
| JP3252289B2 (en) * | 1992-05-15 | 2002-02-04 | 日機装株式会社 | Reciprocating pump |
| GB2275310B (en) * | 1993-02-19 | 1996-01-10 | Duracell Batteries Ltd | Pumps |
| JPH09137782A (en) * | 1995-11-15 | 1997-05-27 | Shimadzu Corp | Manufacture of plunger reciprocating type pump |
| JP3728827B2 (en) * | 1996-09-30 | 2005-12-21 | 株式会社島津製作所 | Feed pump |
| JP3783303B2 (en) * | 1996-10-29 | 2006-06-07 | 株式会社島津製作所 | Plunger type pump |
| US6000916A (en) * | 1998-02-06 | 1999-12-14 | Optimize Technologies, Inc. | Pump head quick connect assembly |
| JP2000064965A (en) * | 1998-05-18 | 2000-03-03 | Yasunaga Corp | Pump element assembly for plunger pump |
| US6325932B1 (en) * | 1999-11-30 | 2001-12-04 | Mykrolis Corporation | Apparatus and method for pumping high viscosity fluid |
| DE19960510C1 (en) * | 1999-12-15 | 2001-05-10 | Terra Ag Fuer Tiefbautechnik S | Ramming device; has cylindrical casing for hydraulic impact piston and closure part screwed onto rear end of casing having connection part with contour element for hydraulic connection |
| AUPQ616200A0 (en) * | 2000-03-10 | 2000-03-30 | Speight, Christopher | Chemical metering pump |
| JP3742791B2 (en) * | 2002-12-03 | 2006-02-08 | 日本ピラー工業株式会社 | pump |
| US20050276705A1 (en) * | 2003-05-27 | 2005-12-15 | Ropintassco 2, Llc. | Positive displacement pump having piston and/or liner with vapor deposited polymer surface |
| US7335003B2 (en) * | 2004-07-09 | 2008-02-26 | Saint-Gobain Performance Plastics Corporation | Precision dispense pump |
| JP2008025515A (en) * | 2006-07-24 | 2008-02-07 | Noiberuku Kk | Liquid delivery device |
-
2009
- 2009-07-27 CN CN200980160574.2A patent/CN102472270B/en active Active
- 2009-07-27 US US13/387,547 patent/US20120118141A1/en not_active Abandoned
- 2009-07-27 JP JP2011524535A patent/JPWO2011013162A1/en active Pending
- 2009-07-27 WO PCT/JP2009/003526 patent/WO2011013162A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS588277A (en) * | 1981-07-06 | 1983-01-18 | Noboru Kimura | Plunger type metering pump |
| CN1372480A (en) * | 2000-05-01 | 2002-10-02 | 巴克斯特国际公司 | Linearly motile infusion pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102472270A (en) | 2012-05-23 |
| JPWO2011013162A1 (en) | 2013-01-07 |
| WO2011013162A1 (en) | 2011-02-03 |
| US20120118141A1 (en) | 2012-05-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |