EP4031288B1 - High-pressure precompression pump - Google Patents
High-pressure precompression pump Download PDFInfo
- Publication number
- EP4031288B1 EP4031288B1 EP20785811.9A EP20785811A EP4031288B1 EP 4031288 B1 EP4031288 B1 EP 4031288B1 EP 20785811 A EP20785811 A EP 20785811A EP 4031288 B1 EP4031288 B1 EP 4031288B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- spring
- outlet valve
- valve element
- sleeve
- 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.)
- Active
Links
- 239000012530 fluid Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 239000007921 spray Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1038—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber
- B05B11/1039—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber the outlet valve being mechanically opened after a defined accumulation stroke
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1042—Components or details
- B05B11/1066—Pump inlet valves
- B05B11/107—Gate valves; Sliding valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1094—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle having inlet or outlet valves not being actuated by pressure or having no inlet or outlet valve
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1097—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle with means for sucking back the liquid or other fluent material in the nozzle after a dispensing stroke
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1001—Piston pumps
Definitions
- the present invention relates to a pump for dispensing metered quantities of fluid product. More particularly, the pump is a precompression pump in which the distribution of the fluid product is carried out at a high pressure of at least 15 bars.
- a disadvantage of pumps of this type is the possible presence of a residual drop of product which remains in the expulsion channel of the pump and/or near it after each actuation. This volume of liquid, even very small, is likely to alter a possible spray nozzle mounted on the pump, for example by partially blocking the hole(s) of said spray nozzle during the storage time between two actuations. This risk is increased when the spray nozzle has a plurality of micro holes.
- the present invention aims to provide a pump which does not reproduce the aforementioned drawbacks.
- the present invention aims in particular to provide a pump in which no residual drop remains at the outlet of the pump after each actuation.
- the present invention also aims to provide a pump which delivers the fluid product at a higher pressure compared to traditional pumps.
- the present invention also aims to provide such a pump which is simple and easy to manufacture and assemble, and reliable in its use.
- the present invention also aims to provide such a pump which ensures total and reproducible distribution of the contents of the pump chamber at each actuation, independently of the user's actuation speed.
- the present invention therefore relates to a fluid product distribution pump, comprising a piston secured to an actuating rod and sliding in a pump body comprising a pump chamber defined between an inlet valve and an outlet valve , said outlet valve comprising an outlet valve element sliding during actuation in a sealed manner in the pump chamber, said pump chamber comprising passage means such that, at the end of actuation of the pump, said outlet valve element cooperates in a non-tight manner with said passage means to open said outlet valve to allow the expulsion of the product contained in the pump chamber, said inlet valve comprising a sliding inlet valve element after closing the inlet valve in a sleeve of the pump body, said sleeve having a reduced diameter and containing a spring resting on the one hand on said inlet valve element and on the other hand on a bottom of said sleeve , said spring, in addition to expelling the product, also returning the piston to its rest position, said outlet valve element being formed by a separate part which is inserted in a movable
- a sleeve is inserted into said pump body to reinforce the side wall of said pump chamber.
- said sleeve comprises a shoulder defining said means for passing said outlet valve.
- said second spring relaxes and moves said outlet valve element axially downwards relative to said piston, generating a depression which sucks up the residual liquid which remains in and /or near said actuation rod after each actuation.
- said sleeve of the pump body in which said inlet valve element slides comprises external reinforcing ribs.
- said fluid product is distributed at a pressure of at least 15 bars.
- the present invention also relates to a fluid product distribution device comprising a pump as described above.
- the pump according to the invention comprises a pump body 3 in which slides a piston 1 secured to an actuating rod 2 on which the user presses to activate the pump.
- the piston 1 slides in a pump chamber 5 defined in the pump body 3 between a valve inlet 11 and an outlet valve 12.
- a fixing ring 4 for example crimpable, screwable or snap-on, allows the pump to be fixed on a tank.
- the inlet valve 11, open in the pump rest position, as visible on the figure 1 , is formed by an inlet valve element 10 movable in the pump body 3 during actuation of the pump. Said inlet valve element 10 cooperates in a sealed manner from the start of actuation of the pump with a sleeve 9 of the pump body 3 to close the inlet valve 11.
- a spring 20 is supported on one hand on the inlet valve element 10 and on the other hand on the bottom of said sleeve 9.
- the outlet valve 12 comprises an outlet valve element 39 made in such a way that, when the pump is actuated, it is only opened at the end of the pump actuation to allow the expulsion of the product contained in the pump chamber.
- This opening is made at the level of passage means 40 formed at the level of a radial internal shoulder of the pump chamber 5.
- the objective of said passage means 40 is to form at least one fluid passage when the element of outlet valve 39, which throughout the actuation stroke of the pump cooperates in a sealed manner with the pump chamber 5, comes to the end of the actuation stroke at the level of said passage means 40.
- the expulsion of the product contained in the pump chamber 5 is carried out independently of the actuation speed exerted by the user.
- the inlet valve element 10 cooperates with the spring 20 which, during actuation of the pump, is compressed by the movement of the inlet valve element 10 under the effect of the pressure created in the pump chamber.
- said compressed spring 20 At the end of the pump's actuation stroke, when the outlet valve 12 is open, said compressed spring 20 will be suddenly released, so that the product contained in the pump chamber is expelled via said spring.
- said spring 20 of the inlet valve 11 also acts as a return spring of the pump, thus returning the piston 1 to its rest position after expulsion of the product.
- the side wall of the pump chamber 5 can be reinforced by inserting a sleeve 50 into the pump body 3.
- This sleeve 50 can be integral, for example in one piece, with the fixing ring 4.
- This sleeve 50 thus forms a double wall in the pump chamber 5, which makes it possible to avoid deformation of the internal side wall of the pump chamber 5 because of the high pressure created by the pump during actuation.
- This sleeve 50 advantageously comprises the radial shoulder forming passage means 40 which defines the outlet valve.
- a waterproof weld 55 can be provided, for example by ultrasound, preferably between two radial flanges respectively of said pump body 3 and of said fixing ring 4 which incorporates sleeve 50.
- the sleeve 9 which cooperates with the inlet valve element 10, extends axially the pump body 3 downwards in the orientation of the figures and contains said inlet valve element 10 and said spring 20
- the sleeve 9 has a reduced diameter compared to the pump body 3. It advantageously includes external reinforcing ribs 90.
- This implementation of the sleeve 9 makes it possible to reduce its radial dimensions. So for example, the sleeve 9 of the pump could have a diameter less than 4.2 mm, advantageously less than 4 mm, preferably 3.9 mm.
- the pump therefore significantly improves the sealing capacities of the various sealed parts, namely the piston 1, the outlet valve element 39 and the inlet valve element 10.
- a spring having a greater force typically at least 20 N, advantageously 25 N.
- the present invention makes it possible to provide a precompression pump capable of distributing the fluid product at a pressure of at least 15 bars, advantageously around 20 bars, which is much higher. than traditional pumps and even superior to valves operating with propellant gas.
- the actuation force of such a pump with a 25 N spring and the surface S of 12 mm 2 is less than 60 N, advantageously around 50 N, which remains acceptable.
- Such a pump is particularly suitable for being associated with a spray nozzle comprising a plurality of micro-holes, in particular with a hole diameter of less than 5 ⁇ m, or even less than 2 ⁇ m.
- the outlet valve element 39 is formed by a separate part which is movably inserted into the piston 1, with the interposition of a second spring 60.
- This second spring 60 exerts, in the rest position shown on the figure 1 , a force greater than that of the spring 20, so that in this rest position, the second spring 60 biases the outlet valve element 39 axially downwards, away from said piston 1.
- spring 20 is compressed, so that in the actuated position, shown on the figures 2 and 3 , the second spring 60 is compressed and the outlet valve element 39 is axially inserted further into the piston 1.
- the second spring 60 can relax again, which moves the outlet valve element 39 axially downwards relative to said piston 1, generating a depression which sucks up the residual liquid which remains in and/or near the actuating rod 2 after each actuation.
- the present invention therefore makes it possible to re-aspirate this small quantity of residual fluid after each actuation, thus preventing any risk of blockage, partial or total, of a spray nozzle placed downstream of the actuation rod 2.
- the second spring 60 is relaxed, given that its force is greater in this rest position than that of spring 20.
- the actuating rod 2 is pushed downwards, which moves the piston 1, the second spring 60, the outlet valve element 39 and the inlet valve element 10 also towards the bottom relative to the pump body 3.
- the inlet valve 11 closes, by sealed cooperation between the lips of the inlet valve element 10 and the internal cylindrical surface of the sleeve 9, while the outlet valve 12 remains closed.
- the spring 20 is then compressed under the effect of the inlet valve element 10 which slides in the sleeve 9.
- the sleeve 9 having a reduced diameter compared to the sleeve 50 disposed in the pump body 3, and the fluid contained in the pump chamber 5 being incompressible, this compression of the spring 20 occurs relatively easily, despite the high force of said spring 20.
- FIG. 2 illustrates the actuated position, with the outlet valve open and therefore the contents of the pump chamber 5 which is expelled under the effect of the spring 20 which relaxes.
- the fluid product is then expelled with a pressure of at least 15 bars, advantageously at least 20 bars.
Description
La présente invention concerne une pompe pour distribuer des quantités dosées de produit fluide. Plus particulièrement, la pompe est une pompe à précompression dans laquelle la distribution du produit fluide est réalisée à une pression élevée d'au moins 15 bars.The present invention relates to a pump for dispensing metered quantities of fluid product. More particularly, the pump is a precompression pump in which the distribution of the fluid product is carried out at a high pressure of at least 15 bars.
Les documents
Un inconvénient des pompes de ce type est la possible présence d'une goutte résiduelle de produit qui reste dans le canal d'expulsion de la pompe et/ou à proximité de celui-ci après chaque actionnement. Ce volume de liquide, même très faible, est susceptible d'altérer une éventuelle buse de pulvérisation montée sur la pompe, par exemple en bouchant partiellement le ou les trous de ladite buse de pulvérisation pendant le temps de stockage entre deux actionnements. Ce risque est accru lorsque la buse de pulvérisation comporte une pluralité de micro trous.A disadvantage of pumps of this type is the possible presence of a residual drop of product which remains in the expulsion channel of the pump and/or near it after each actuation. This volume of liquid, even very small, is likely to alter a possible spray nozzle mounted on the pump, for example by partially blocking the hole(s) of said spray nozzle during the storage time between two actuations. This risk is increased when the spray nozzle has a plurality of micro holes.
Les documents
La présente invention a pour but de fournir une pompe qui ne reproduit pas les inconvénients susmentionnés.The present invention aims to provide a pump which does not reproduce the aforementioned drawbacks.
La présente invention a notamment pour but de fournir une pompe dans laquelle il ne reste pas de goutte résiduelle à la sortie de la pompe après chaque actionnement.The present invention aims in particular to provide a pump in which no residual drop remains at the outlet of the pump after each actuation.
La présente invention a aussi pour but de fournir une pompe qui délivre le produit fluide à une pression supérieure comparée aux pompes traditionnelles.The present invention also aims to provide a pump which delivers the fluid product at a higher pressure compared to traditional pumps.
La présente invention a également pour but de fournir une telle pompe qui soit simple et facile à fabriquer et à assembler, et fiable dans son utilisation.The present invention also aims to provide such a pump which is simple and easy to manufacture and assemble, and reliable in its use.
La présente invention a également pour but de fournir une telle pompe qui assure une distribution totale et reproductible du contenu de la chambre de pompe à chaque actionnement, indépendamment de la vitesse d'actionnement de l'utilisateur.The present invention also aims to provide such a pump which ensures total and reproducible distribution of the contents of the pump chamber at each actuation, independently of the user's actuation speed.
La présente invention a donc pour objet une pompe de distribution de produit fluide, comportant un piston solidaire d'une tige d'actionnement et coulissant dans un corps de pompe comprenant une chambre de pompe définie entre un clapet d'entrée et un clapet de sortie, ledit clapet de sortie comportant un élément de clapet de sortie coulissant lors de l'actionnement de manière étanche dans la chambre de pompe, ladite chambre de pompe comportant des moyens de passage de telle sorte que, en fin d'actionnement de la pompe, ledit élément de clapet de sortie coopère de manière non étanche avec lesdits moyens de passage pour ouvrir ledit clapet de sortie pour permettre l'expulsion du produit contenu dans la chambre de pompe, ledit clapet d'entrée comportant un élément de clapet d'entrée coulissant après fermeture du clapet d'entrée dans un manchon du corps de pompe, ledit manchon ayant un diamètre réduit et contenant un ressort s'appuyant d'une part sur ledit élément de clapet d'entrée et d'autre part sur un fond dudit manchon, ledit ressort, outre l'expulsion du produit, ramenant aussi le piston dans sa position de repos, ledit élément de clapet de sortie étant formé par une pièce séparée qui vient s'insérer de manière mobile dans ledit piston, avec interposition d'un second ressort, la force exercée par ledit second ressort étant supérieure à la force exercée par ledit ressort en position de repos, et inférieure à la force exercée par ledit ressort en position actionnée.The present invention therefore relates to a fluid product distribution pump, comprising a piston secured to an actuating rod and sliding in a pump body comprising a pump chamber defined between an inlet valve and an outlet valve , said outlet valve comprising an outlet valve element sliding during actuation in a sealed manner in the pump chamber, said pump chamber comprising passage means such that, at the end of actuation of the pump, said outlet valve element cooperates in a non-tight manner with said passage means to open said outlet valve to allow the expulsion of the product contained in the pump chamber, said inlet valve comprising a sliding inlet valve element after closing the inlet valve in a sleeve of the pump body, said sleeve having a reduced diameter and containing a spring resting on the one hand on said inlet valve element and on the other hand on a bottom of said sleeve , said spring, in addition to expelling the product, also returning the piston to its rest position, said outlet valve element being formed by a separate part which is inserted in a movable manner into said piston, with the interposition of a second spring, the force exerted by said second spring being greater than the force exerted by said spring in the rest position, and less than the force exerted by said spring in the actuated position.
Avantageusement, un manchon est inséré dans ledit corps de pompe pour renforcer la paroi latérale de ladite chambre de pompe.Advantageously, a sleeve is inserted into said pump body to reinforce the side wall of said pump chamber.
Avantageusement, ledit manchon comporte un épaulement définissant lesdits moyens de passage dudit clapet de sortie.Advantageously, said sleeve comprises a shoulder defining said means for passing said outlet valve.
Avantageusement, lorsque le piston est revenu dans sa position de repos après un actionnement, ledit second ressort se détend et déplace ledit élément de clapet de sortie axialement vers le bas par rapport audit piston, générant une dépression qui aspire le liquide résiduel qui reste dans et/ou à proximité de ladite tige d'actionnement après chaque actionnement.Advantageously, when the piston has returned to its rest position after actuation, said second spring relaxes and moves said outlet valve element axially downwards relative to said piston, generating a depression which sucks up the residual liquid which remains in and /or near said actuation rod after each actuation.
Avantageusement, ledit manchon du corps de pompe dans lequel coulisse ledit élément de clapet d'entrée comporte des nervures externes de renforcement.Advantageously, said sleeve of the pump body in which said inlet valve element slides comprises external reinforcing ribs.
Avantageusement, ledit produit fluide est distribué à une pression d'au moins 15 bars.Advantageously, said fluid product is distributed at a pressure of at least 15 bars.
La présente invention a aussi pour objet un dispositif de distribution de produit fluide comportant une pompe telle que décrite ci-dessus.The present invention also relates to a fluid product distribution device comprising a pump as described above.
Ces caractéristiques et avantages et d'autres de la présente invention apparaîtront plus clairement à partir de la description détaillée suivante, faite en référence aux dessins joints donnés à titre d'exemples non-limitatifs, sur lesquels :
- la
figure 1 est une vue schématique en section transversale d'une pompe selon un mode de réalisation avantageux, en position de repos, - la
figure 2 est une vue similaire à celle de lafigure 1 , en position actionnée, et - la
figure 3 est une vue de détail agrandie d'une partie de lafigure 2 .
- there
figure 1 is a schematic cross-sectional view of a pump according to an advantageous embodiment, in the rest position, - there
figure 2 is a view similar to that of thefigure 1 , in the activated position, and - there
Figure 3 is an enlarged detail view of part of thefigure 2 .
Dans la description ci-après, les termes "haut" et "bas" se réfèrent à la position droite de la pompe représentée sur les figures. Les termes "axial", "latéral" et "radial" se réfèrent à l'axe central longitudinal de la pompe.In the description below, the terms "up" and "down" refer to the upright position of the pump shown in the figures. The terms "axial", "lateral" and "radial" refer to the longitudinal central axis of the pump.
La pompe selon l'invention comporte un corps de pompe 3 dans lequel coulisse un piston 1 solidaire d'une tige d'actionnement 2 sur laquelle l'utilisateur appuie pour actionner la pompe. Le piston 1 coulisse dans une chambre de pompe 5 définie dans le corps de pompe 3 entre un clapet d'entrée 11 et un clapet de sortie 12. Une bague de fixation 4, par exemple sertissable, vissable ou encliquetable, permet de fixer la pompe sur un réservoir.The pump according to the invention comprises a
Le clapet d'entrée 11, ouvert en position de repos de la pompe, comme visible sur la
Le clapet de sortie 12 comporte un élément de clapet de sortie 39 réalisé de telle sorte que, lors de l'actionnement de la pompe, il n'est ouvert qu'en fin d'actionnement de la pompe pour permettre l'expulsion du produit contenu dans la chambre de pompe. Cette ouverture est réalisée, au niveau de moyens de passage 40 formés au niveau d'un épaulement interne radial de la chambre de pompe 5. L'objectif desdits moyens de passage 40 est de former au moins un passage de fluide lorsque l'élément de clapet de sortie 39, qui pendant toute la course d'actionnement de la pompe coopère de manière étanche avec la chambre de pompe 5, vient en fin de course d'actionnement au niveau desdits moyens de passage 40.The
Ainsi, l'expulsion du produit contenu dans la chambre de pompe 5 est réalisée indépendamment de la vitesse d'actionnement exercée par l'utilisateur. Pour ce faire, l'élément de clapet d'entrée 10 coopère avec le ressort 20 qui, lors de l'actionnement de la pompe, est comprimé par le déplacement de l'élément de clapet d'entrée 10 sous l'effet de la pression créée dans la chambre de pompe. En fin de course d'actionnement de la pompe, lorsque le clapet de sortie 12 est ouvert, ledit ressort comprimé 20 va être brusquement libéré, de sorte que le produit contenu dans la chambre de pompe est expulsé par l'intermédiaire dudit ressort. Avantageusement, ledit ressort 20 du clapet d'entrée 11 agit aussi en tant que ressort de rappel de la pompe, ramenant ainsi le piston 1 dans sa position de repos après expulsion du produit.Thus, the expulsion of the product contained in the
La paroi latérale de la chambre de pompe 5 peut être renforcée par l'insertion d'un manchon 50 dans le corps de pompe 3. Ce manchon 50 peut être solidaire, par exemple d'une pièce, avec la bague de fixation 4. Ce manchon 50 forme ainsi une double paroi dans la chambre de pompe 5, ce qui permet d'éviter une déformation de la paroi latérale interne de la chambre de pompe 5 à cause de la forte pression créée par la pompe lors de l'actionnement. Ce manchon 50 comporte avantageusement l'épaulement radial formant moyens de passage 40 qui définit le clapet de sortie. Avantageusement, pour éviter toutes fuites entre le manchon 50 et le corps de pompe 3, on peut prévoir une soudure étanche 55, par exemple par ultrasons, de préférence entre deux brides radiales respectivement dudit corps de pompe 3 et de ladite bague de fixation 4 qui incorpore le manchon 50.The side wall of the
De même, le manchon 9, qui coopère avec l'élément de clapet d'entrée 10, prolonge axialement le corps de pompe 3 vers le bas dans l'orientation des figures et contient ledit élément de clapet d'entrée 10 et ledit ressort 20. Le manchon 9 a un diamètre réduit par rapport au corps de pompe 3. Il comporte avantageusement des nervures de renforcements externes 90. Cette mise en oeuvre du manchon 9 permet de diminuer ses dimensions radiales. Ainsi par exemple, le manchon 9 de la pompe pourrait avoir un diamètre inférieur à 4,2 mm, avantageusement inférieur à 4 mm, de préférence 3,9 mm.Likewise, the
La pompe améliore donc sensiblement les capacités d'étanchéité des différentes pièces étanches, à savoir le piston 1, l'élément de clapet de sortie 39 et l'élément de clapet d'entrée 10.The pump therefore significantly improves the sealing capacities of the various sealed parts, namely the
Ainsi, il devient possible d'utiliser un ressort ayant une force supérieure, typiquement au moins 20 N, avantageusement 25 N.Thus, it becomes possible to use a spring having a greater force, typically at least 20 N, advantageously 25 N.
Avec un diamètre interne du manchon 9 de 3,9 mm, soit une surface de 12 mm2, et un ressort de 20 N, on arrive à une pression P d'environ 16,5 bars. Avec un ressort de 25 N, la pression monte à environ 21 bars.With an internal diameter of the
Ainsi, la présente invention permet de fournir une pompe à précompression capable de distribuer le produit fluide à une pression d'au moins 15 bars, avantageusement environ 20 bars, ce qui est bien supérieur aux pompes traditionnelles et même supérieur aux valves fonctionnant avec un gaz propulseur.Thus, the present invention makes it possible to provide a precompression pump capable of distributing the fluid product at a pressure of at least 15 bars, advantageously around 20 bars, which is much higher. than traditional pumps and even superior to valves operating with propellant gas.
L'effort d'actionnement d'une telle pompe avec un ressort à 25 N et la surface S de 12 mm2 est inférieur à 60 N, avantageusement d'environ 50 N, ce qui reste acceptable.The actuation force of such a pump with a 25 N spring and the surface S of 12 mm 2 is less than 60 N, advantageously around 50 N, which remains acceptable.
Une telle pompe est notamment adaptée pour être associée à une buse de pulvérisation comportant une pluralité de micro-trous, notamment avec un diamètre de trou inférieur à 5 µm, voire inférieur à 2µm.Such a pump is particularly suitable for being associated with a spray nozzle comprising a plurality of micro-holes, in particular with a hole diameter of less than 5 µm, or even less than 2 µm.
Selon l'invention, l'élément de clapet de sortie 39 est formé par une pièce séparée qui vient s'insérer de manière mobile dans le piston 1, avec interposition d'un second ressort 60.According to the invention, the
Ce second ressort 60 exerce, en position de repos représentée sur la
Lors de l'actionnement, le ressort 20 est comprimé, de sorte qu'en position actionnée, représentée sur les
Après l'actionnement, lorsque le piston 1 est revenu dans sa position de repos, le second ressort 60 peut à nouveau se détendre, ce qui déplace l'élément de clapet de sortie 39 axialement vers le bas par rapport audit piston 1, générant une dépression qui aspire le liquide résiduel qui reste dans et/ou à proximité de la tige d'actionnement 2 après chaque actionnement.After actuation, when the
La présente invention permet donc de ré-aspirer après chaque actionnement cette petite quantité de fluide résiduelle, empêchant ainsi tout risque de bouchage, partiel ou total, d'une buse de pulvérisation disposée en aval de la tige d'actionnement 2.The present invention therefore makes it possible to re-aspirate this small quantity of residual fluid after each actuation, thus preventing any risk of blockage, partial or total, of a spray nozzle placed downstream of the
Le fonctionnement de la pompe sera expliqué ci-après.The operation of the pump will be explained below.
La position de repos est visible sur la
Le second ressort 60 est détendu, étant donné que sa force est supérieure dans cette position de repos à celle du ressort 20.The
Dans cette position de repos, l'élément de clapet de sortie 39 est poussé axialement vers le bas par le second ressort 60 pour venir en contact avec l'élément de clapet d'entrée 10 qui s'appuie sur le ressort 20.In this rest position, the
En début d'actionnement, la tige d'actionnement 2 est poussée vers le bas, ce qui déplace le piston 1, le second ressort 60, l'élément de clapet de sortie 39 et l'élément de clapet d'entrée 10 également vers le bas par rapport au corps de pompe 3. Le clapet d'entrée 11 se ferme, par coopération étanche entre les lèvres de l'élément de clapet d'entrée 10 et la surface cylindrique interne du manchon 9, alors que le clapet de sortie 12 reste fermé. Le ressort 20 se comprime alors sous l'effet de l'élément de clapet d'entrée 10 qui coulisse dans le manchon 9. Le manchon 9 ayant un diamètre réduit par rapport au manchon 50 disposé dans le corps de pompe 3, et le fluide contenu dans la chambre de pompe 5 étant incompressible, cette compression du ressort 20 se produit relativement aisément, malgré la force élevée dudit ressort 20.At the start of actuation, the
Lorsque la force du ressort 20 comprimé devient supérieure à celle du second ressort 60, ce dernier va se comprimer et permettre un léger déplacement de l'élément de clapet de sortie 39 axialement vers le haut par rapport au piston 1.When the force of the
Lorsqu'on approche de la fin d'actionnement, l'élément de clapet de sortie 39 approche de l'épaulement 40 du clapet de sortie, pour ouvrir celui-ci.When we approach the end of actuation, the
La
Lorsque l'utilisateur relâche la pression sur la tige d'actionnement 2 de la pompe, le ressort 20 ramène le piston 1 dans sa position de repos.When the user releases the pressure on the
Lorsque la force du ressort 20 en cours de décompression devient à nouveau inférieure à celle du second ressort 60, ce dernier va se décomprimer et provoquer un léger déplacement de l'élément de clapet de sortie 39 axialement vers le bas par rapport au piston 1. Ceci va générer une dépression dans la tige d'actionnement 2 et aspirer le petit volume de liquide ou fluide résiduel qui demeure dans et/ou à proximité de ladite tige d'actionnement après chaque actionnement.When the force of the
Bien entendu, l'invention n'est pas limitée à l'exemple de réalisation représenté sur les dessins, et la portée de l'invention est au contraire définie par les revendications annexées.Of course, the invention is not limited to the exemplary embodiment shown in the drawings, and the scope of the invention is on the contrary defined by the appended claims.
Claims (7)
- A pump for dispensing a fluid product comprising a piston (1) secured to an actuating stem (2) and which slides in a pump body (3) having a pump chamber (5) defined between an inlet valve (11) and an outlet valve (12), said outlet valve (12) comprising an outlet valve element (398) sliding during actuation in a sealed manner in the pump chamber (5), said pump chamber (5) comprising passage means (40) such that, at the end of actuation of the pump, said outlet valve element (39) co-operates in a non-sealed manner with said passage means (40) in order to open said outlet valve (12) to allow the expulsion of the product contained in the pump chamber, said inlet valve (11) comprising an inlet valve element (10) which slides after closure of the inlet valve (11) in a sleeve (9) of the pump body (3), said sleeve (9) of the pump body having a reduced diameter and containing a spring (20) pressing firstly on said inlet valve element (10) and secondly on a bottom of said sleeve (9) of the pump body, said spring (20), in addition expelling the product, also returning the piston (1) into its rest position, said outlet valve element (39) is formed by a separate part which is inserted movably in said piston (1), with the interposition of a second spring (60), the force exerted by said second spring (60) being greater than the force exerted by said spring (20) in position at rest, and less than the force exerted by said spring (20) in the actuated position.
- The pump according to claim 1, wherein a reinforcing sleeve (50) is inserted into said pump body (3) to reinforce the side wall of said pump chamber (5).
- The pump according to claim 2, wherein said reinforcing sleeve (50) includes a shoulder defining said passage means (40) of said outlet valve (12).
- The pump according to any preceding claim, wherein, when the piston (1) is returned to its rest position after actuation, said second spring (60) expands and moves said outlet valve element (39) axially downwards relative to said piston (1), generating a vacuum that draws the residual liquid that remains in and/or near said actuating stem (2) after each actuation.
- The pump according to any preceding claim, wherein said sleeve (9) of the pump body (3) in which said inlet valve element (10) slides includes external reinforcing ridges (90).
- The pump according to any preceding claim, wherein said fluid is dispensed at a pressure of at least 15 bar.
- A product fluid product dispensing device, characterized in that it includes a pump according to any one of preceding claims.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1910258A FR3100724B1 (en) | 2019-09-17 | 2019-09-17 | High pressure pre-compression pump |
PCT/FR2020/051596 WO2021053291A1 (en) | 2019-09-17 | 2020-09-16 | High-pressure precompression pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP4031288A1 EP4031288A1 (en) | 2022-07-27 |
EP4031288B1 true EP4031288B1 (en) | 2023-09-13 |
Family
ID=68501835
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20785811.9A Active EP4031288B1 (en) | 2019-09-17 | 2020-09-16 | High-pressure precompression pump |
Country Status (5)
Country | Link |
---|---|
US (1) | US20220379331A1 (en) |
EP (1) | EP4031288B1 (en) |
CN (1) | CN114364615B (en) |
FR (1) | FR3100724B1 (en) |
WO (1) | WO2021053291A1 (en) |
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2019
- 2019-09-17 FR FR1910258A patent/FR3100724B1/en active Active
-
2020
- 2020-09-16 EP EP20785811.9A patent/EP4031288B1/en active Active
- 2020-09-16 US US17/760,961 patent/US20220379331A1/en active Pending
- 2020-09-16 WO PCT/FR2020/051596 patent/WO2021053291A1/en active Search and Examination
- 2020-09-16 CN CN202080062631.XA patent/CN114364615B/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN114364615B (en) | 2023-10-24 |
FR3100724A1 (en) | 2021-03-19 |
CN114364615A (en) | 2022-04-15 |
WO2021053291A1 (en) | 2021-03-25 |
US20220379331A1 (en) | 2022-12-01 |
EP4031288A1 (en) | 2022-07-27 |
FR3100724B1 (en) | 2023-03-24 |
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