CN102926963A - Single connecting rod-linked double-cavity metering pump - Google Patents
Single connecting rod-linked double-cavity metering pump Download PDFInfo
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- CN102926963A CN102926963A CN2012101847035A CN201210184703A CN102926963A CN 102926963 A CN102926963 A CN 102926963A CN 2012101847035 A CN2012101847035 A CN 2012101847035A CN 201210184703 A CN201210184703 A CN 201210184703A CN 102926963 A CN102926963 A CN 102926963A
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- metering
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- way valve
- outlet
- metering pump
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Abstract
The invention relates to a single connecting rod-linked double-cavity metering pump, which comprises a liquid absorption pump, a metering pump, a driving device and a linkage rod, wherein the driving device is connected with the linkage rod in a matched mode; one end of the linkage rod is connected with a liquid absorption plunger or a plunger diaphragm of the liquid absorption pump, and the other end of the linkage rod is connected with a metering plunger or a metering diaphragm of the metering pump; a liquid inlet and a liquid outlet are formed in the liquid absorption pump; a liquid absorption cavity inlet check valve is arranged at the liquid inlet; a liquid absorption cavity outlet check valve is arranged at the liquid outlet; a metering liquid inlet and a metering liquid outlet are formed in the metering pump; a metering cavity inlet check valve is arranged at the metering liquid inlet, and a metering cavity outlet check valve is arranged at the metering liquid outlet; the metering cavity inlet check valve is connected with the liquid absorption cavity outlet check valve by a connecting pipeline; and an overflow device is arranged on the liquid absorption pump or the connecting pipeline. The single connecting rod-linked double-cavity metering pump is novel in structure, high in stability and low in cost, interference by external factors during liquid absorption is eliminated, and the accuracy of metering is improved greatly.
Description
[technical field]
The present invention relates to the microprocessor pump drive technical field, specifically a kind of single connection-rod linkage bicavate metering pump can be applicable to urea metering injection system in the automobile-used SCR reprocessing.
[background technique]
Present Miniature plunger metering pump or diaphragm metering pump are to use single plunger or single diaphragm, are used for finishing simultaneously imbitition and carry out volume measurement.The reciprocating frequency by control plunger or diaphragm is carried out the metering of liquid or the control of flow, when micro-precision measures, the metering cavity volume is very little, when imbitition, be subjected to the impact of external condition very sensitive, as by the height of imbitition, outside barometric pressure, the altitude change of region, the rigidity of pick-up tube, the bubble in the liquid, cracking pressure of one-way valve etc., these all can affect the amount of being full of of liquid in the metering cavity, thereby reduced greatly the precision of metering, stability is lower.Particularly in automobile-used SCR after-treatment system, the external factor of these impacts shows more outstandingly.
[summary of the invention]
Purpose of the present invention is exactly will solve above-mentioned deficiency and a kind of single connection-rod linkage bicavate metering pump is provided, and measuring accuracy is high, and highly stable.
Design for achieving the above object a kind of single connection-rod linkage bicavate metering pump, comprise suction pumps, metering pump, drive unit 5, linkage rod 6, the be connected linkage rod of linear reciprocating motion of described drive unit, described linkage rod one end connects imbibition plunger or the diaphragm 4 of suction pumps, the described linkage rod the other end connects metering plunger or the diaphragm 7 of metering pump, described suction pumps is provided with liquid entering hole 1, liquid outlet, imbibition chamber import one-way valve 2 is equipped with at described liquid entering hole 1 place, imbibition chamber outlet one-way valve 13 is equipped with at described liquid outlet place, described metering pump is provided with the import of metering liquid, metering liquid outlet 10, measuring cavity import one-way valve 11 is equipped with in described metering liquid inlet, described metering liquid exports 10 places measuring cavity outlet one-way valve 9 is housed, described measuring cavity import one-way valve 11 is connected by connecting pipeline 12 with imbibition chamber outlet one-way valve 13, described suction pumps or connecting pipeline 12 are provided with overflow mechanism, and the imbibition chamber volume of described suction pumps is greater than the measuring cavity volume of metering pump.
Described overflow mechanism comprises overflow one-way valve 14, liquid return pipe 15, the liquid entering hole end of described overflow one-way valve 14 is connected with the imbibition chamber 3 of suction pumps or connecting pipeline 12, the liquid outlet end of described overflow one-way valve 14 connects liquid return pipe 15, and the cracking pressure of described overflow one-way valve 14 is less than the cracking pressure of measuring cavity outlet one-way valve 9.
Described drive unit adopts reciprocal electromagnet or motor to cooperate eccentric wheel.
The present invention compares with prior art, has the following advantages:
1, with the process of imbibition process and metering, finished by the imbibition chamber of suction pumps and the measuring cavity of metering pump respectively, measuring cavity is by imbibition chamber feed flow, thereby the interference of external factor when having got rid of imbibition has improved the precision of metering greatly.
2, novel structure of the present invention, measuring accuracy is high, and stability is strong, and cost is low.
When 3, adopting solenoid actuated, can control the current"on"time of electromagnetic core coil 100% dutycycle, the process of control heating heating is used for before starting severe winter the heating of this pump housing is prevented from freezing, and has saved other heating equipment, greatly reduces cost.
[description of drawings]
Fig. 1 is structural representation of the present invention;
Fig. 2 is the another embodiment of the present invention structural representation;
Among the figure: 1 be liquid entering hole, 2 for imbibition chamber import one-way valve, 3 for the imbibition chamber, 4 for imbibition plunger or diaphragm, 5 for drive unit, 6 for linkage rod, 7 for metering plunger or diaphragm, 8 for measuring cavity, 9 for measuring cavity outlet one-way valve, 10 for the outlet of metering liquid, 11 for measuring cavity import one-way valve, 12 for connecting pipeline, 13 for imbibition chamber outlet one-way valve, 14 be that overflow one-way valve, 15 is liquid return pipe.
[embodiment]
Further specify below below in conjunction with accompanying drawing the present invention being done:
As shown in Figure 1, the present invention includes: suction pumps, metering pump, drive unit 5, linkage rod 6, the be connected linkage rod of linear reciprocating motion of described drive unit, described linkage rod one end connects imbibition plunger or the diaphragm 4 of suction pumps, the described linkage rod the other end connects metering plunger or the diaphragm 7 of metering pump, described suction pumps is provided with liquid entering hole 1, liquid outlet, imbibition chamber import one-way valve 2 is equipped with at described liquid entering hole 1 place, imbibition chamber outlet one-way valve 13 is equipped with at described liquid outlet place, described metering pump is provided with the import of metering liquid, metering liquid outlet 10, measuring cavity import one-way valve 11 is equipped with in described metering liquid inlet, described metering liquid exports 10 places measuring cavity outlet one-way valve 9 is housed, described measuring cavity import one-way valve 11 is connected by connecting pipeline 12 with imbibition chamber outlet one-way valve 13, described connecting pipeline 12 is provided with overflow one-way valve 14, and the liquid outlet end of described overflow one-way valve 14 connects liquid return pipe 15.
As shown in Figure 2, overflow one-way valve 14 of the present invention also can be installed on the suction pumps.
Key feature of the present invention:
1, the imbibition chamber volume of suction pumps must be greater than the measuring cavity volume of metering pump;
2, the cracking pressure of measuring cavity outlet one-way valve is greater than the cracking pressure of overflow one-way valve;
3, outlet one-way valve in imbibition chamber directly is connected by connecting pipeline with measuring cavity import one-way valve, and namely measuring cavity is by the direct feed flow in imbibition chamber;
4, imbibition plunger or diaphragm and metering plunger or diaphragm are to carry out synchronous drive by same connecting rod;
5, the driving mode of drive link: 1) by bidirectional electromagnet driving, 2) electromagnet adds spring, 3) the driven by motor eccentric wheel, become the motion of linear reciprocation.
Working principle of the present invention: when linkage rod is moved to compression metering cavity direction, metering plunger or diaphragm 7 compressed liquids, measuring cavity import one-way valve 11 is closed, the outlet one-way valve 9 of measuring cavity is opened, the liquid that is measured extrudes, simultaneously under the effect of same driving linkage rod, and imbibition plunger or diaphragm 4 pumping liquids, imbibition chamber import this moment one-way valve 2 is opened, and imbibition chamber outlet one-way valve 13 is closed.The process of the fluid removal of so just finishing imbibition and being measured.When the linkage rod reversing motion, it namely is the process of metering, the liquid that has been filled in the imbibition chamber is compressed, imbibition chamber import one-way valve 2 is closed, imbibition chamber outlet one-way valve 13 is opened, measuring cavity 8 forms negative pressure simultaneously, measuring cavity import one-way valve 11 is opened, measuring cavity outlet one-way valve 9 is closed, liquid 3 flows into measuring cavity 8 by connecting pipeline 12 from the imbibition chamber, because the volume in imbibition chamber is large and the volume of measuring cavity, the cracking pressure of measuring cavity outlet one-way valve 9 is greater than the cracking pressure of overflow one-way valve 14, and after measuring cavity 8 was filled, pressure can be increased to the cracking pressure value of overflow one-way valve 14, at this moment overflow one-way valve 14 is opened, and unnecessary liquid will flow back to the liquid storage filling from liquid return pipe 15.So just finished the process that measuring cavity is filled up.
The volume of measuring cavity is constant, drives the reciprocating frequency of continuous motion stem by control, just can finish the control of continuous metering or the flow of liquid.
The present invention is not subjected to the restriction of above-mentioned mode of execution, and other any do not deviate from change, the modification done under Spirit Essence of the present invention and the principle, substitutes, combination, simplify and (as: connect to substitute an one-way valve with 2 above one-way valves; Substitute relief valve etc. with pressure maintaining valve), all should be equivalent substitute mode, be included within protection scope of the present invention.
Claims (3)
1. single connection-rod linkage bicavate metering pump, comprise suction pumps, metering pump, drive unit (5), linkage rod (6), it is characterized in that: the be connected linkage rod of linear reciprocating motion of described drive unit, described linkage rod one end connects imbibition plunger or the diaphragm (4) of suction pumps, the described linkage rod the other end connects metering plunger or the diaphragm (7) of metering pump, described suction pumps is provided with liquid entering hole (1), liquid outlet, described liquid entering hole (1) locates to be equipped with imbibition chamber import one-way valve (2), imbibition chamber outlet one-way valve (13) is equipped with at described liquid outlet place, described metering pump is provided with the import of metering liquid, metering liquid outlet (10), measuring cavity import one-way valve (11) is equipped with in described metering liquid inlet, described metering liquid outlet (10) locates to be equipped with measuring cavity outlet one-way valve (9), described measuring cavity import one-way valve (11) is connected by connecting pipeline (12) with imbibition chamber outlet one-way valve (13), described suction pumps or connecting pipeline (12) are provided with overflow mechanism, and the imbibition chamber volume of described suction pumps is greater than the measuring cavity volume of metering pump.
2. single connection-rod linkage bicavate metering pump as claimed in claim 1, it is characterized in that: described overflow mechanism comprises overflow one-way valve (14), liquid return pipe (15), the liquid entering hole end of described overflow one-way valve (14) is connected with imbibition chamber (3) or the connecting pipeline (12) of suction pumps, the liquid outlet end of described overflow one-way valve (14) connects liquid return pipe (15), and the cracking pressure of described overflow one-way valve (14) exports the cracking pressure of one-way valve (9) less than measuring cavity.
3. single connection-rod linkage bicavate metering pump as claimed in claim 1 or 2 is characterized in that: described drive unit adopts reciprocal electromagnet or motor to cooperate eccentric wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210184703.5A CN102926963B (en) | 2012-04-27 | 2012-06-06 | Single connecting rod-linked double-cavity metering pump |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220186473 | 2012-04-27 | ||
| CN201220186473.1 | 2012-04-27 | ||
| CN2012201864731 | 2012-04-27 | ||
| CN201210184703.5A CN102926963B (en) | 2012-04-27 | 2012-06-06 | Single connecting rod-linked double-cavity metering pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102926963A true CN102926963A (en) | 2013-02-13 |
| CN102926963B CN102926963B (en) | 2015-04-08 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220264714 Expired - Lifetime CN202707394U (en) | 2012-04-27 | 2012-06-06 | Single connecting rod linkage double-cavity metering pump |
| CN201210184703.5A Active CN102926963B (en) | 2012-04-27 | 2012-06-06 | Single connecting rod-linked double-cavity metering pump |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220264714 Expired - Lifetime CN202707394U (en) | 2012-04-27 | 2012-06-06 | Single connecting rod linkage double-cavity metering pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN202707394U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050627A (en) * | 2015-04-13 | 2016-10-26 | 贝恩德·尼特哈默尔 | Pump for a selective catalytic reduction (SCR) system in vehicles |
| CN113175422A (en) * | 2021-05-06 | 2021-07-27 | 上海雅燊电子技术有限公司 | Novel hydraulic metering pump and measuring method thereof |
| CN113180990A (en) * | 2020-01-14 | 2021-07-30 | 有几园生物科技股份有限公司 | Law motive machine |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202707394U (en) * | 2012-04-27 | 2013-01-30 | 陈绍丽 | Single connecting rod linkage double-cavity metering pump |
| CN107781128A (en) * | 2016-08-30 | 2018-03-09 | 上海昊芯自动化科技有限公司 | A kind of air force solution transport metering mechanism |
| CN107060730A (en) * | 2017-06-15 | 2017-08-18 | 上海诺仪表有限公司 | A kind of individual well multi-phase flow meter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108378A (en) * | 1985-07-05 | 1986-12-31 | 林明鸾 | The improvement of pump |
| JPH0396669A (en) * | 1989-09-08 | 1991-04-22 | Smc Corp | Airhydro-output pressure control pump |
| US5649809A (en) * | 1994-12-08 | 1997-07-22 | Abel Gmbh & Co. Handels-Und Verwaltungsgesllschaft | Crankshaft and piston rod connection for a double diaphragm pump |
| WO2001094782A2 (en) * | 2000-06-02 | 2001-12-13 | Tokyo Electron Limited | Dual diaphragm pump |
| DE102009044268B3 (en) * | 2009-10-16 | 2010-12-02 | Christ, Herbert, Dipl.-Ing. | System for detection of an oil mist, at potential hot spots, has an optical sensor at the inflow channel into a double membrane suction pump using a permanent magnet and coil for membrane vibration |
| CN202707394U (en) * | 2012-04-27 | 2013-01-30 | 陈绍丽 | Single connecting rod linkage double-cavity metering pump |
-
2012
- 2012-06-06 CN CN 201220264714 patent/CN202707394U/en not_active Expired - Lifetime
- 2012-06-06 CN CN201210184703.5A patent/CN102926963B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108378A (en) * | 1985-07-05 | 1986-12-31 | 林明鸾 | The improvement of pump |
| JPH0396669A (en) * | 1989-09-08 | 1991-04-22 | Smc Corp | Airhydro-output pressure control pump |
| US5649809A (en) * | 1994-12-08 | 1997-07-22 | Abel Gmbh & Co. Handels-Und Verwaltungsgesllschaft | Crankshaft and piston rod connection for a double diaphragm pump |
| WO2001094782A2 (en) * | 2000-06-02 | 2001-12-13 | Tokyo Electron Limited | Dual diaphragm pump |
| DE102009044268B3 (en) * | 2009-10-16 | 2010-12-02 | Christ, Herbert, Dipl.-Ing. | System for detection of an oil mist, at potential hot spots, has an optical sensor at the inflow channel into a double membrane suction pump using a permanent magnet and coil for membrane vibration |
| CN202707394U (en) * | 2012-04-27 | 2013-01-30 | 陈绍丽 | Single connecting rod linkage double-cavity metering pump |
Non-Patent Citations (1)
| Title |
|---|
| 王积功: "双隔膜计量泵的结构原理及应用", 《流体机械》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050627A (en) * | 2015-04-13 | 2016-10-26 | 贝恩德·尼特哈默尔 | Pump for a selective catalytic reduction (SCR) system in vehicles |
| US11466679B2 (en) | 2015-04-13 | 2022-10-11 | Bernd Niethammer | Pump for a selective catalytic reduction (SCR) system in vehicles comprising at least one pump element comprising a pump piston, a spring bellow, and an actuation tappet under force of a compression spring surrounding the spring bellow |
| CN113180990A (en) * | 2020-01-14 | 2021-07-30 | 有几园生物科技股份有限公司 | Law motive machine |
| CN113175422A (en) * | 2021-05-06 | 2021-07-27 | 上海雅燊电子技术有限公司 | Novel hydraulic metering pump and measuring method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN202707394U (en) | 2013-01-30 |
| CN102926963B (en) | 2015-04-08 |
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