WO2002002938A1 - Pompe de dosage pour introduire un additif dans un courant de fluide - Google Patents
Pompe de dosage pour introduire un additif dans un courant de fluide Download PDFInfo
- Publication number
- WO2002002938A1 WO2002002938A1 PCT/FR2001/002081 FR0102081W WO0202938A1 WO 2002002938 A1 WO2002002938 A1 WO 2002002938A1 FR 0102081 W FR0102081 W FR 0102081W WO 0202938 A1 WO0202938 A1 WO 0202938A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- additive
- pump
- main flow
- inlet
- bypass
- Prior art date
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
- F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
- F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time
Definitions
- the invention relates to a device for varying the metering of an additive in a main flow of liquid, the metering being provided by a pump driven by the main flow of liquid, the pump comprising a first inlet for the main flow of liquid, a second inlet for the additive, and an outlet for the dosed mixture of the additive.
- US 5,957,153 shows a system involving several solenoid valves for injecting an additive. In the absence of electrical energy to control the solenoid valves, the additive cannot be injected.
- Proportional dosers are known, for example from FR-2602282, FR-2681645 or FR-2681646 which have the advantage of being autonomous from the energy point of view. Indeed, they are both a pump driven by the main flow of liquid, and a means of controlling the flow because they are volumetric due to their design.
- the dispensers of the FR 2 681 645 or FR 2 681 646 type offer a possibility of manual dosage adjustment.
- you want to adjust the dosage you vary the dosage stroke to change the amount injected or aspirated additive.
- Such a solution does not seem very satisfactory because the parts are generally studied to be operated manually and are not suitable for automatic control by mechanical or electromechanical means.
- the dosing precision generally varies with the stroke length of a piston, and decreases for low dosages corresponding to short strokes.
- the object of the invention is therefore, above all, to propose a device making it possible to vary the dosage of an additive in a main flow of liquid which is of a simple and effective design, and which can be immediately adapted to a metering device , in particular a fixed dispenser, while ensuring good dosing precision and good homogeneity of the dosed mixture.
- a device for varying the dosage of an additive in a main flow of liquid the dosage being provided by a pump driven by the main flow of liquid, the pump comprising a first inlet for the main flow with a bypass from a zone located upstream of the inlet, and means for controlling this bypass, a second inlet for the additive and an outlet for the metered mixture, is characterized by the fact that: - the bypass of the flow main is provided between the area located upstream of the first inlet and an area located downstream of the outlet, on a section of pipeline coming to be connected to the outlet, so as to allow a parallel flow rate not comprising the additive;
- control means on the bypass are means for periodically controlling the bypass and the first input of the pump, these control means being provided so that each control period includes at least one phase for which the bypass is open and the first entry is closed, and another phase for which the bypass is closed while the first entry is open.
- the periodic control means are provided to allow the duration of each phase to be adjusted.
- the frequency of periodic control is chosen to be high enough to ensure a homogeneous mixing of the additive at the outlet.
- the periodic control means can include:
- each valve means is consisting of a solenoid valve and the control means comprise an electric pulse generator controlling the solenoid valves.
- the first and second valve means can be combined into a single three-way valve, including a three-way solenoid valve.
- the pump can be a fixed adjustment metering device.
- the adjustment device makes it possible to vary the dosage between a maximum value corresponding to the value of the fixed adjustment and a value practically zero.
- the dosing precision is kept on all setting values.
- the invention also relates to a metering pump equipped with a device for varying the metering as defined above, as well as to a metering installation comprising a pump and such a device.
- the solenoid valve device consumes very little energy and the control of the solenoid valves can be carried out using a battery or a battery, so that the assembly can be easily moved and embedded.
- the invention consists, apart from the arrangements set out above, of a certain number of other arrangements which will be more explicitly discussed below in connection with an exemplary embodiment described with reference to the attached drawing, but which is by no means limiting.
- Figure 1 of this drawing is a diagram of a device for varying the dosage of an additive according to one invention.
- Figure 2 is a diagram with three-way valve.
- FIG. 3 finally, is a diagram illustrating as a function of the time plotted on the abscissa, the distribution of the injection of additive.
- the metering is ensured by a pump 1, of vertical axis, driven by the main flow of liquid.
- the pump has a first inlet 2 for the main flow, a second inlet 3 for the additive A and an outlet 4 for the metered mixture.
- a pump 1 is autonomous from the energy point of view and does not require an electrical supply to operate.
- the pump 1 can for example be of the type taught by FR 2 681 646 which allows manual adjustment of the dosage, or of the fixed metering type without the possibility of manual adjustment of the dosage.
- the actual pump is located in the lower part 1a of smaller diameter of a casing, and it is actuated by a hydraulic motor situated inside the upper part 1b of larger diameter of the casing.
- This hydraulic motor (not visible in the drawing) comprises a differential piston with vertical reciprocating movement in the part 1b, the movement reversals of which are controlled mechanically and / or hydraulically, without involving electrical control, in particular y of solenoid valves.
- the actual pump comprises a plunger movable in vertical alternating translation, mechanically linked to the differential piston of the engine.
- Such an assembly is known, in particular from patent FR 2 602 282, the description of which is incorporated by reference into the present description, and to which reference may be made for more details.
- the device R comprises a bypass 5 of the main flow between a zone 6 located upstream of the first inlet 2 and a zone 7 situated downstream of the outlet 4.
- the bypass 5 is formed by a single pipe forming a bypass between the zone 6 and zone 7.
- the device R may include a section of pipe 8 which is connected between the inlet 2 and a main flow line 9, the zone 6 being located on this section 8.
- the downstream zone 7 is located on a section 10 of pipe coming to be connected to the outlet 4 and to another pipe 11 for discharging the metered mixture.
- Means for periodic control C of the bypass 5 and of the first input 2 are provided.
- control means C comprise a first solenoid valve 12 mounted on the branch 5 downstream of the zone 6, and a second solenoid valve 13 mounted on the section 8 to control 1 • inlet 2 of the pump 1.
- a pulse generator 14 has two outputs connected by respective electrical conductors 15, 16 to the solenoid valves 12, 13.
- the control signals of the generator 14 are periodic and are provided so that during one phase, the lead 5 is open and the first input 2 is closed and, during another phase, the lead 5 is closed and entrance 2 is open.
- the opening phase of the bypass 5 (and closing the input 2) corresponds to a control signal in a slot Udl, represented by a rectangular slot in Fig.l and the other phase of opening the input 2 (and closing of 5) corresponds to a signal Ud2 also represented by a slot in Fig.l.
- Fig. 2 we can see an alternative embodiment according to which the two solenoid valves 12, 13 are replaced by a three-way solenoid valve 12a, controlled by the generator 14 with a conductor 15a.
- the solenoid valve 12a performs the same functions as those previously described for the two valves 12 and 13.
- a flow controller 17, advantageously adjustable, is provided for the metered mixture.
- the adjustment of the durations of the slots Udl and Ud2 can be carried out with great precision thanks, for example, to timers and / or quartz clocks so that there is no need to provide a servo-control of the output value of the dosing at a set value.
- the frequency of the slots Udl and Ud2 is chosen to be as large as possible as a function of the solenoid valves 12, 13 which must be prevented from vibrating. The frequency is preferably greater than 10 Hz, in particular of the order of 50 Hz.
- This pump 1 generally comprises a piston driven by a reciprocating rectilinear movement.
- the frequency of the slots Udl, Ud2 is advantageously chosen at least equal to 10 times the average frequency of the reciprocating movement of the piston of the pump 1.
- a homogeneous mixture between the additive and the main liquid is obtained in the outlet pipe 11.
- Q denotes the liquid flow rate into which the additive is injected; this flow rate Qm is that of the current flowing through the pump when the solenoid valve 13 is open and the solenoid valve 12 is closed.
- Qb denotes the flow of derivative liquid in which there is no injection of additive, when one solenoid valve 12 is open while 13 is closed.
- N the frequency of the slots Udl, Ud2
- N injections per unit of time for example per second.
- the volume of liquid leaving the pump contains a percentage of additive A corresponding to the percentage f% defined by pump 1.
- the actual percentage R% of the mixture will have a value at most equal to f% for the case where Udl is zero and less than f% when Udl is not zero.
- the flow rate Qp of the mixture at the outlet, in the pipe 11, is equal to the sum of the volumes treated and the volumes not treated per unit of time.
- the total duration of the injections is equal to N.Ud2; the volume processed is therefore Qm.N.Ud2.
- the actual percentage R% of additive is equal to the ratio of the quantity of additive contained in the volume treated to the total volume.
- the quantity of additive contained in the treated volume is equal to f% .Qm.N.Ud2.
- R% (f% .Qm.N.Ud2) / N (Qb.Udl + Qm.Ud2)
- the main flow rate Qp is sampled in treated flow pulses Qm and untreated flow rate Qb. From a fixed dispenser 1, it is possible to vary the dosage.
- the ratio of the flow rates Qb / Qm can either be defined constant by means of control of the valve, nozzle or any other means of regulation, or else can vary, which then requires compensating for these variations by adjusting the ratio of the durations by means of a classic servo.
- the driving energy of pump 1 is the water flow. Only the electronic or digital control by the pulse generator 14 must be electrically powered, which is easily done using a battery. The device can be easily integrated, or embedded, in a mobile installation.
- Pump 1 can be chosen with a fixed dosage of satisfactory precision.
- the precision of the fixed metering is not degraded by the device according to the invention which makes it possible to obtain high precision.
- An interesting application relates to the dosing of an adjuvant or a dye in water used to prepare concrete on a site, in the building industry.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Accessories For Mixers (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Electrical Variables (AREA)
- Jet Pumps And Other Pumps (AREA)
- Medicinal Preparation (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT01949579T ATE280326T1 (de) | 2000-07-06 | 2001-06-29 | Dosierpumpe zur abgabe eines zusatzstoffes in eine fluidströmung |
DE60106616T DE60106616T2 (de) | 2000-07-06 | 2001-06-29 | Dosierpumpe zur abgabe eines zusatzstoffes in eine fluidströmung |
JP2002507172A JP4896346B2 (ja) | 2000-07-06 | 2001-06-29 | 流体の流れ内に添加剤を導入するための流量調節ポンプ |
EP01949579A EP1297254B1 (fr) | 2000-07-06 | 2001-06-29 | Pompe de dosage pour introduire un additif dans un courant de fluide |
DK01949579T DK1297254T3 (da) | 2000-07-06 | 2001-06-29 | Doseringspumpe til tilsætning af et additiv i en væskeström |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR00/08778 | 2000-07-06 | ||
FR0008778A FR2811381B1 (fr) | 2000-07-06 | 2000-07-06 | Dispositif pour faire varier le dosage d'un additif dans un liquide, pompe et installation de dosage equipees d'un tel dispositif |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002002938A1 true WO2002002938A1 (fr) | 2002-01-10 |
Family
ID=8852162
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2001/002081 WO2002002938A1 (fr) | 2000-07-06 | 2001-06-29 | Pompe de dosage pour introduire un additif dans un courant de fluide |
Country Status (9)
Country | Link |
---|---|
US (1) | US20020192085A1 (fr) |
EP (1) | EP1297254B1 (fr) |
JP (1) | JP4896346B2 (fr) |
AT (1) | ATE280326T1 (fr) |
DE (1) | DE60106616T2 (fr) |
DK (1) | DK1297254T3 (fr) |
ES (1) | ES2230336T3 (fr) |
FR (1) | FR2811381B1 (fr) |
WO (1) | WO2002002938A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106283527A (zh) * | 2015-06-05 | 2017-01-04 | 宁波吉德家电科技有限公司 | 一种注入液态洗涤助剂的方法及装置 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1564408B1 (fr) | 2004-02-12 | 2006-11-02 | Askoll Holding S.r.l. | Pompe de circulation fluidique pour systèmes de chauffage et de climatisation, ou autres systèmes de ce genre |
MX2013012306A (es) * | 2011-04-20 | 2014-08-01 | Anue Water Technologies Inc | Sistemas y metodos de tratamiento de agua. |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3776252A (en) * | 1971-12-03 | 1973-12-04 | Riggs & Lombard Inc | Self-regulating system for mixing liquids |
DE4214226A1 (de) * | 1992-04-30 | 1993-11-04 | Keller Kg Wilhelm | Vorrichtung zum mischen von fluessigkeiten |
US5957153A (en) * | 1998-09-18 | 1999-09-28 | Frey Turbodynamics, Ltd. | Oscillating dual bladder balanced pressure proportioning pump system |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55131814A (en) * | 1979-03-31 | 1980-10-14 | Z Kogyo:Kk | Controller for quantitative injection proportional flow-rate |
JPS6324481Y2 (fr) * | 1980-02-15 | 1988-07-05 | ||
JPH0655073B2 (ja) * | 1986-07-03 | 1994-07-27 | 住友電気工業株式会社 | 液体肥料稀釈切替装置 |
-
2000
- 2000-07-06 FR FR0008778A patent/FR2811381B1/fr not_active Expired - Fee Related
-
2001
- 2001-06-29 US US10/182,206 patent/US20020192085A1/en not_active Abandoned
- 2001-06-29 AT AT01949579T patent/ATE280326T1/de active
- 2001-06-29 EP EP01949579A patent/EP1297254B1/fr not_active Expired - Lifetime
- 2001-06-29 WO PCT/FR2001/002081 patent/WO2002002938A1/fr active IP Right Grant
- 2001-06-29 JP JP2002507172A patent/JP4896346B2/ja not_active Expired - Fee Related
- 2001-06-29 DK DK01949579T patent/DK1297254T3/da active
- 2001-06-29 DE DE60106616T patent/DE60106616T2/de not_active Expired - Lifetime
- 2001-06-29 ES ES01949579T patent/ES2230336T3/es not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3776252A (en) * | 1971-12-03 | 1973-12-04 | Riggs & Lombard Inc | Self-regulating system for mixing liquids |
DE4214226A1 (de) * | 1992-04-30 | 1993-11-04 | Keller Kg Wilhelm | Vorrichtung zum mischen von fluessigkeiten |
US5957153A (en) * | 1998-09-18 | 1999-09-28 | Frey Turbodynamics, Ltd. | Oscillating dual bladder balanced pressure proportioning pump system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106283527A (zh) * | 2015-06-05 | 2017-01-04 | 宁波吉德家电科技有限公司 | 一种注入液态洗涤助剂的方法及装置 |
CN106283527B (zh) * | 2015-06-05 | 2024-05-10 | 宁波吉德家电科技有限公司 | 一种注入液态洗涤助剂的方法及装置 |
Also Published As
Publication number | Publication date |
---|---|
EP1297254A1 (fr) | 2003-04-02 |
FR2811381A1 (fr) | 2002-01-11 |
JP4896346B2 (ja) | 2012-03-14 |
ATE280326T1 (de) | 2004-11-15 |
DE60106616T2 (de) | 2005-10-27 |
DK1297254T3 (da) | 2005-02-07 |
US20020192085A1 (en) | 2002-12-19 |
FR2811381B1 (fr) | 2002-10-25 |
JP2004502256A (ja) | 2004-01-22 |
DE60106616D1 (de) | 2004-11-25 |
EP1297254B1 (fr) | 2004-10-20 |
ES2230336T3 (es) | 2005-05-01 |
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