FR2638812A1 - Device for damping out pulsing in pumped fluid - Google Patents
Device for damping out pulsing in pumped fluid Download PDFInfo
- Publication number
- FR2638812A1 FR2638812A1 FR8814471A FR8814471A FR2638812A1 FR 2638812 A1 FR2638812 A1 FR 2638812A1 FR 8814471 A FR8814471 A FR 8814471A FR 8814471 A FR8814471 A FR 8814471A FR 2638812 A1 FR2638812 A1 FR 2638812A1
- Authority
- FR
- France
- Prior art keywords
- pot
- damping
- diameter
- piping
- bell
- 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.)
- Granted
Links
Classifications
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
- F16L55/05—Buffers therefor
- F16L55/052—Pneumatic reservoirs
-
- 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
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
- F04B11/0008—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators
- F04B11/0016—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators with a fluid spring
- F04B11/0025—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators with a fluid spring the spring fluid being in direct contact with the pumped fluid
Abstract
Description
Dispositif d'amortissement de pulsations de fluide pompé. Device for damping pulsations of pumped fluid.
La presente invention a pour objet un dispositif damortlssement de fluide pompé et en particulier d'amortir totalement les pulsations engendrées par des pompes volumétriques. du type alternatif ou du type péristaltique. de façon a obtenir un debit continu a l'extremite de la tuyauterie de refoulement L'lnvention trouve une complète efficacité quand la pompe véhicule et dose a basse vitesse, c'est-à-dire avec des pulsations très espacées. des mélanges liquides ou visqueux, abrasifs ou corrosifs, souvent chargés, en particulier de produits fragiles écrasant facilement, et chauds, et ce, dans un circuit dont les pertes de charges sont faibles, en genéral. The object of the present invention is a device for damping pumped fluid and in particular for completely damping the pulsations generated by positive displacement pumps. of the alternative type or of the peristaltic type. so as to obtain a continuous flow at the end of the discharge piping The invention finds complete efficiency when the pump conveys and doses at low speed, that is to say with very spaced pulsations. liquid or viscous, abrasive or corrosive mixtures, often loaded, in particular with fragile products which can easily be crushed, and hot, in a circuit in which the pressure losses are low, in general.
L'invention vise entre autres la manipulation de produits tels que les produits alimentaires fragiles avec des parties entières à ne pas abirner. tels que des confitures, des sauces, des garnitures ou des farces pour plats cuisines. Ces produits doivent être manipulés avec soin. Dans l'exemple d'une confiture. les morceaux de fruits, très fragiles, ne doivent pas être écrasés et mélangés au sirop, sans quoi la confiture perd son attrait gustatif et commercial Pour repondre a de telles applications, on peut penser a des pompes à mouvement péristaltique qui ne comportent ni clapet, ni garniture. The invention relates inter alia to the manipulation of products such as fragile food products with whole parts not to be spoiled. such as jams, sauces, toppings or stuffings for cooked dishes. These products must be handled with care. In the example of a jam. the pieces of fruit, very fragile, must not be crushed and mixed with syrup, otherwise the jam loses its taste and commercial appeal To respond to such applications, we can think of pumps with peristaltic movement which do not include a valve neither garnish.
Elles sont faciles à nettoyer et résistent bien à l'abraslon. Par contre, elles engendrent un débit pulsé qui est inacceptable dans de nombreux cas
Il est connu d'utiliser un pot amortisseur sur la canalisation, en aval de la pompe, mais quelles que soient la forme et la dimension du pot amortisseur. on ne parvient pas a éliminer complètement, cXest-à-dire suffisamment, les pulsations.They are easy to clean and resist abrasion well. However, they generate a pulsed flow which is unacceptable in many cases
It is known to use a damping pot on the pipe, downstream of the pump, but whatever the shape and size of the damping pot. we cannot completely eliminate, that is to say enough, the pulsations.
Conformement a la presente invention, en tenant compte du fait que la veine passante dans les circuits d'aspiration et de refoulement est sujette a des mouvements de va-et-vient, d'autant plus perceptibles que la vitesse d'avance du produit est faible. on prévoit de placer sur la canalisation de refoulement d'une pompe volumetrique a débit pulsé, au moins deux amortisseurs en série du type accumulateur en forme de cloche et conçus de telle sorte que le diamètre d'entrée soit au moins égal a celui de la tuyauterie et fixé le plus près possible de cette dernière. Par contre. In accordance with the present invention, taking into account the fact that the passing vein in the suction and delivery circuits is subject to back-and-forth movements, all the more perceptible as the speed of advance of the product is low. at least two shock absorbers in series of the bell-shaped accumulator type are designed to be placed on the discharge pipe of a positive-displacement positive displacement pump and designed so that the inlet diameter is at least equal to that of the piping and fixed as close as possible to the latter. On the other hand.
I'amortissement sera efficace dans la mesure ou le produit est en contact avec le coussin de gaz sur une section importante. Damping will be effective insofar as the product is in contact with the gas cushion over a large section.
D'autres caractéristiques et avantages de l'lnvention apparaitront au cours de la description suivante. donnée å titre dexemple non limitatif, en regard des dessins ci-joints. et qui fera bien comprendre comment l'lnvention peut être réalisée. Other characteristics and advantages of the invention will become apparent from the following description. given by way of nonlimiting example, with reference to the attached drawings. and which will make it clear how the invention can be realized.
Sur les dessins - la figure 1 est une vue en élévation d'un mode de réalisation de
l'invention, et - la figure 2 est une vue en coupe d'un des amortisseurs de la figure 1.In the drawings - Figure 1 is an elevational view of an embodiment of
the invention, and - Figure 2 is a sectional view of one of the shock absorbers of Figure 1.
Sur la figure l'on a représente une pompe volumétrique a débit pulsé 1, avec une canalisation d'aspiration 2, et une canalisation de refoulement 3
Cette dernière est fixée å la pompe par un raccord 4 Sur la canalisation de refoulement sont montés deux pots amortisseurs 5 et 6. Un tel pot amortisseur est représenté en coupe sur la figure 2. Il comprend une cloche il fixee, par filetage par exemple, sur une embase 12, comportant un orifice central 13 Les sections s 2 des orifices des deux amortisseurs sont égales, et au moins égales à la section S3 de la canalisation de refoulement de la pompe.Chaque amortisseur est monté au moyen d'un raccord T qui peut être soude sur l'embase de lwamortisseur. A l'lnterieur de l#anortisseur, le produit 14 s'élève jusque un niveau 15, laissant une poche de gaz 16. La distance H, entre lzentrée du pot et la tuyauterie, devra être la plus courte possible. Selon une autre caractéristique de l'invention, la tuyauterie de refoulement sera horizontale et rectiligne, ce qui facilitera la realisation d'une distance H courte, puisqu'il y a avantage à ce que le pot soit vertical.In the figure we have a pulsed flow positive displacement pump 1, with a suction line 2, and a discharge line 3
The latter is fixed to the pump by a fitting 4. On the discharge pipe, two shock absorbing pots 5 and 6 are mounted. Such a shock absorbing pot is shown in section in FIG. 2. It comprises a bell fixed there, by thread for example, on a base 12, comprising a central orifice 13 The sections s 2 of the orifices of the two shock absorbers are equal, and at least equal to the section S3 of the discharge pipe of the pump. Each shock absorber is mounted by means of a fitting T which can be welded on the shock absorber base. Inside the shock absorber, the product 14 rises to a level 15, leaving a gas pocket 16. The distance H, between the inlet of the pot and the piping, must be as short as possible. According to another characteristic of the invention, the delivery pipe will be horizontal and straight, which will facilitate the realization of a short distance H, since it is advantageous for the pot to be vertical.
L'amortissement est efficace parce que le produit est en contact avec le coussin de gaz sur une section importante. Comme la section d'entrée est en general limitee a celle de la tuyauterie, il est prevu, selon la presente invention, de déposer plusieurs amortisseurs en série (un minimum de deux) pour affiner l'amortissement. Un premier pot qui se trouve près de la pompe amortit une partie importante de la pulsation. Le deuxième encaisse. en general, le reste de la pulsation. Ce deuxieme pot est souvent suffisant pour donner un débit régulier å la sortie du dispositif. Toutefois, suivant les débits et la présentation du produit, un troisième appareil peut être nécessaire.Cette réalisation présente la particularité d'être facilement démontable pour être nettoyee, et parfois aseptisee
Chaque pot se visse sur une embase en contact direct avec la tuyauterie.Damping is effective because the product is in contact with the gas cushion over a large section. As the inlet section is generally limited to that of the piping, it is planned, according to the present invention, to deposit several dampers in series (a minimum of two) to refine the damping. A first pot near the pump dampens a large part of the pulsation. The second cash. in general, the rest of the pulse. This second pot is often sufficient to give a regular flow at the outlet of the device. However, depending on the flow rates and the presentation of the product, a third device may be necessary.This embodiment has the distinction of being easily removable to be cleaned, and sometimes sanitized
Each pot is screwed onto a base in direct contact with the piping.
Le perçage central a un diamètre égal à celui de la tuyauterie. L#étanchéité entre le pot et son embase s'effectue à l'aide d'un joint en élastomère démontable. Avantageusement. le diamètre du pot est compris entre deux et quatre fois le diamètre de l'entrée (ou celui de la canalisation de refoulement) La hauteur depend du produit et de la vitesse du refoulement, qui est fonction de la section et du débit.The central hole has a diameter equal to that of the piping. The seal between the pot and its base is made using a removable elastomer seal. Advantageously. the diameter of the pot is between two and four times the diameter of the inlet (or that of the discharge line) The height depends on the product and the speed of the discharge, which is a function of the section and the flow rate.
Il peut être prévu une membrane en élastomère obtenue par moulage et ayant une forme de cloche dont la hauteur est égale au tiers de celle de la cloche en metal. L'extremite de cette cloche comprend sur toute sa peripherie une surépaisseur qui joue le rôle de joint d'etanchéités Dans cette variante, le produit n'est pas en contact direct avec le gaz contenu dans la cloche. An elastomer membrane obtained by molding and having the shape of a bell, the height of which is equal to one third that of the metal bell, may be provided. The end of this bell comprises over its entire periphery an additional thickness which acts as a seal. In this variant, the product is not in direct contact with the gas contained in the bell.
Toutefois, cette membrane souple encaisse les pulsations. However, this flexible membrane collects the pulsations.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8814471A FR2638812A1 (en) | 1988-11-04 | 1988-11-04 | Device for damping out pulsing in pumped fluid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8814471A FR2638812A1 (en) | 1988-11-04 | 1988-11-04 | Device for damping out pulsing in pumped fluid |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2638812A1 true FR2638812A1 (en) | 1990-05-11 |
FR2638812B1 FR2638812B1 (en) | 1994-08-19 |
Family
ID=9371609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8814471A Granted FR2638812A1 (en) | 1988-11-04 | 1988-11-04 | Device for damping out pulsing in pumped fluid |
Country Status (1)
Country | Link |
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FR (1) | FR2638812A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996021519A2 (en) * | 1995-01-09 | 1996-07-18 | Campbell Hausfeld/Scott Fetzer Co. | Airless paint sprayer intake dampener and inlet valve spring |
US5639219A (en) * | 1995-01-09 | 1997-06-17 | Campbell Hausfeld/Scott Fetzer Co. | Airless paint sprayer intake dampener and inlet valve spring |
EP1273800A1 (en) * | 2001-07-05 | 2003-01-08 | T.R.C.S.n.c. di Toninello Daniele e C. | Peristaltic pump for dosing a fluid |
EP3067528B1 (en) * | 2015-03-13 | 2018-04-25 | Inergy Automotive Systems Research (Société Anonyme) | Pump for a fluid |
DE102018110848A1 (en) * | 2018-05-07 | 2019-11-07 | Mhwirth Gmbh | Pulsationsdämpfungssystem |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1350878A (en) * | 1962-12-21 | 1964-01-31 | Anciens Etablissements Panhard | Improvements made to variable-rate hydraulic transmission installations, in particular for motor vehicles |
DE2036199A1 (en) * | 1969-07-23 | 1971-02-11 | Hitachi Ltd , Tokio | Storage for damping a pump pressure oscillation |
DE1703951A1 (en) * | 1968-08-03 | 1972-02-24 | Netzsch Maschinenfabrik | Air chamber with a device for supplying compressed gas |
FR2510637A1 (en) * | 1981-07-29 | 1983-02-04 | Idrorame Spa | DEVICE FOR RESTORING THE AIR CONTENT OF AIR TANKS FOR REGULARIZING THE DISTRIBUTION OF PRESSURIZED WATER INCLUDING THE USE OF INTERMITTENT STEP PUMPS |
FR2597162A1 (en) * | 1986-04-14 | 1987-10-16 | Chapeau Philippe | Device for increasing the efficiency and making the output of wind pumps and hand pumps uniform |
-
1988
- 1988-11-04 FR FR8814471A patent/FR2638812A1/en active Granted
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1350878A (en) * | 1962-12-21 | 1964-01-31 | Anciens Etablissements Panhard | Improvements made to variable-rate hydraulic transmission installations, in particular for motor vehicles |
DE1703951A1 (en) * | 1968-08-03 | 1972-02-24 | Netzsch Maschinenfabrik | Air chamber with a device for supplying compressed gas |
DE2036199A1 (en) * | 1969-07-23 | 1971-02-11 | Hitachi Ltd , Tokio | Storage for damping a pump pressure oscillation |
FR2510637A1 (en) * | 1981-07-29 | 1983-02-04 | Idrorame Spa | DEVICE FOR RESTORING THE AIR CONTENT OF AIR TANKS FOR REGULARIZING THE DISTRIBUTION OF PRESSURIZED WATER INCLUDING THE USE OF INTERMITTENT STEP PUMPS |
FR2597162A1 (en) * | 1986-04-14 | 1987-10-16 | Chapeau Philippe | Device for increasing the efficiency and making the output of wind pumps and hand pumps uniform |
Non-Patent Citations (1)
Title |
---|
OIL & GAS JOURNAL vol. 81, no. 18, 2 Mai 1983, TULSA, USA pages 180 - 193; MILLER: 'Pulsation-control devices and techniques' * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996021519A2 (en) * | 1995-01-09 | 1996-07-18 | Campbell Hausfeld/Scott Fetzer Co. | Airless paint sprayer intake dampener and inlet valve spring |
WO1996021519A3 (en) * | 1995-01-09 | 1996-10-31 | Campbell Hausfeld Scott Fetzer | Airless paint sprayer intake dampener and inlet valve spring |
US5639219A (en) * | 1995-01-09 | 1997-06-17 | Campbell Hausfeld/Scott Fetzer Co. | Airless paint sprayer intake dampener and inlet valve spring |
EP1273800A1 (en) * | 2001-07-05 | 2003-01-08 | T.R.C.S.n.c. di Toninello Daniele e C. | Peristaltic pump for dosing a fluid |
EP3067528B1 (en) * | 2015-03-13 | 2018-04-25 | Inergy Automotive Systems Research (Société Anonyme) | Pump for a fluid |
DE102018110848A1 (en) * | 2018-05-07 | 2019-11-07 | Mhwirth Gmbh | Pulsationsdämpfungssystem |
Also Published As
Publication number | Publication date |
---|---|
FR2638812B1 (en) | 1994-08-19 |
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ST | Notification of lapse |