WO2004082353A2 - Dispositif d'aspiration pneumatique - Google Patents
Dispositif d'aspiration pneumatique Download PDFInfo
- Publication number
- WO2004082353A2 WO2004082353A2 PCT/FR2004/000518 FR2004000518W WO2004082353A2 WO 2004082353 A2 WO2004082353 A2 WO 2004082353A2 FR 2004000518 W FR2004000518 W FR 2004000518W WO 2004082353 A2 WO2004082353 A2 WO 2004082353A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- suction device
- nozzle
- pneumatic suction
- secondary nozzle
- compressed gas
- 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.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
- F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
- F04F5/461—Adjustable nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/48—Control
- F04F5/52—Control of evacuating pumps
Definitions
- the present invention relates to a pneumatic suction device, that is to say powered by pressurized air and venturi effect.
- Household, urban or industrial cleaning can be carried out using more or less complex suction devices. But whatever the configuration chosen, there are essentially two parameters to control, namely, the flow and the vacuum. These functional characteristics must be adapted according to the intended application, and in particular the product to be aspirated.
- suction devices called pneumatic, in which the expansion of a pressurized gas is used to create a vacuum and, consequently, generate a suction phenomenon.
- the pressurized gas is generally compressed air from a factory supply network or a site compressor, for example.
- the compressed air is sent into a nozzle whose internal shape is adapted to generate, by venturi effect, a vacuum upstream of the weakest section of said nozzle when the compressed air expands downstream of said section.
- This principle being perfectly known, it will not be described further here. It will simply be recalled that the flow rate and the vacuum depend, of course, on the shape and dimensions of the nozzle, and in particular of its section. In fact, with a large nozzle, we will obtain a volume large displacement air but at the cost of a relatively low depression. Conversely, with a nozzle of smaller dimensions, there will be less flow but the depression will then be greater.
- the technical problem to be solved by the object of the present invention is to provide a pneumatic suction device comprising a nozzle, called the main one, through which the expansion of a compressed gas is capable of generating by reaction a given flow and vacuum aspiration, which pneumatic suction device makes it possible to avoid the problems of the state of the art by offering appreciably extended capacities of use, in particular in terms of the nature and the consistency of the products to be aspirate.
- the pneumatic suction device further comprises at least one secondary nozzle activatable by reaction in substitution for the main nozzle, through which the expansion of the compressed gas is capable of generating a suction of a lower flow rate and of a higher vacuum respectively to the flow rate and to the vacuum obtained with the main nozzle, and in that each secondary nozzle coaxial with the main nozzle is mounted movable in displacement between a position passive in which the effective expansion of the compressed gas is operated in the main nozzle and an active position in which the effective expansion of the compressed gas is operated by said secondary nozzle.
- the invention as thus defined has the advantage of being able to vary the essential parameters of the suction as a function of the envisaged application, and in particular of the nature and / or the consistency of the product to be aspirated.
- the same pneumatic suction device is able to collect efficiently, both substances requiring both a high flow rate and a limited vacuum such as, for example, dust or powdery materials, as substances requiring on the contrary a significant depression, even if it means having a reduced flow rate, such as, for example, more or less viscous liquids.
- FIG. 1 schematically represents a pneumatic suction device according to the invention, in which the main nozzle is active.
- Figure 2 is a diagram similar to that of Figure 1, but in which it is the secondary nozzle which is active.
- FIGS 1 and 2 schematically illustrate a pneumatic suction device (1) operating on the basis of compressed air at about 6 to 7 bars, which is supplied here via the inlet (2).
- the pneumatic suction device (1) is provided with a so-called main nozzle (10) which is shaped so that the expansion of the compressed air through it can generate, by reaction in the recovery container (50), a high flow suction and limited vacuum.
- the pneumatic suction device (1) further comprises a secondary nozzle (20) which is, in turn, shaped, so that the air expansion compressed through it is able to generate, by reaction, a suction of low flow but significant depression.
- This secondary nozzle (20) coaxial with the main nozzle, is, moreover, mounted movable in displacement in translation, between a passive position ( Figure 1) where it acts as an expansion nozzle, and in which the effective expansion of the compressed air is effected via the main nozzle (10), and an active position (FIG. 2), in which the effective expansion of the compressed air is achieved via said secondary nozzle (20); the compressed air to be relieved being supplied by the rear nozzle (200) integral in its movements with the secondary nozzle.
- the main nozzle (10) and the secondary nozzle (20) are coaxial.
- the secondary nozzle (20) is mounted movable in axial translation relative to the main nozzle (10). But, of course, other relative positioning and other types of mobility could perfectly well be envisaged.
- the pneumatic suction device (1) further comprises displacement means (30) which are arranged so as to be able to ensure the mobility of the secondary nozzle (20) between its passive position ( Figure 1) and its active position ( Figure 2), perfect and identified and to meet the ventilation requirements "venturi".
- the displacement means (30) here comprise a jack (31) which is able to move the secondary nozzle (20) between its passive position (FIG. 1) and its active position (FIG. 2) in which said secondary nozzle is disposed respectively at a distance and substantially inside the main nozzle.
- This characteristic allows in a way to be able to neutralize the main nozzle (10) in a reversible manner, by modifying its internal section by interposition of the secondary nozzle (20) between the flow of compressed air and said main nozzle (10).
- the jack (31) is composed of a hollow rod (32) which is integral with a piston (33) slidably mounted inside a sealed chamber (34); the distal end of the hollow rod (32) being integral with the secondary nozzle (20).
- the hollow rod (32) comprises, on the one hand, an inlet opening (35) communicating with supply means (4) with compressed air, and on the other hand, an exhaust opening, constituting a diffusion nozzle (36) opening directly into the secondary nozzle (20).
- the hollow rod thus advantageously serves as a conduit for bringing the compressed air to the interior of the pneumatic suction device (1) of the "venturi" type.
- the pneumatic suction device (1) comprises control means (40) which are able to control the bidirectional implementation of the displacement means (30).
- the means of control (40) of the vacuum level in the recovery container comprise a valve which is able to inject pressurized air, via the line (5), into the active part (37). of the chamber (34) of the jack (31), thereby translating the piston (33) and consequently, the secondary nozzle (20), to generate a vacuum more important, and this, without injection of compressed air into the active part (37) of the chamber (34) of the jack (31), the stable position of the piston (33) being, in fact, the position withdrawn from the jack.
- control means (40) are, moreover, capable of determining the level of the vacuum generated inside the pneumatic suction device (1).
- the control means (40) communicate with the interior of the pneumatic suction device (1) via a conduit (6).
- control means (40) are able to automatically control the implementation or displacement means (30) when the vacuum inside the pneumatic suction device (1) exceeds a predetermined threshold value or falls below this threshold value after operating at high vacuum.
- the pneumatic suction device (1) is configured by default to operate with the main nozzle (10); the secondary nozzle (20) being in the passive position.
- Compressed air from the inlet (2) (arrow fl) is admitted to the system (arrow f2) under control of the distribution means (3).
- the compressed air then arrives (arrow f3) via the conduit (4) in the passive part (38) of the chamber (34) of the jack (31). It then passes through the intake opening (35) in the hollow rod (32) which it crosses (arrow f4) until it opens into the secondary nozzle (20) via the nozzle (36), the expansion function of which is neutralized in the rear position.
- the control means (40) When, for example, for reasons of obturation and suction difficulty, the vacuum level inside the pneumatic suction device (1) reaches a predetermined threshold value, the control means (40) go into operation. be informed by the presence of the conduit (6). In accordance with FIG. 2, the control means (40) will then command the implementation of the displacement means (30) in order to activate the secondary nozzle (20). For this, compressed air will be injected via the line (5) (arrow f9) into the active part (37) of the chamber (34) of the jack (31), which will cause the piston (33) to move. ). The secondary nozzle (20) will therefore translate in the direction of the main nozzle (10), to its active position.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2520806A CA2520806C (fr) | 2003-03-11 | 2004-03-05 | Dispositif d'aspiration pneumatique |
| US11/237,451 US20060153694A1 (en) | 2003-03-11 | 2005-09-28 | Pneumatic suction device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0302968A FR2852364B1 (fr) | 2003-03-11 | 2003-03-11 | Dispositif d'aspiration pneumatique |
| FR03/02968 | 2003-03-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2004082353A2 true WO2004082353A2 (fr) | 2004-09-30 |
| WO2004082353A3 WO2004082353A3 (fr) | 2004-10-28 |
Family
ID=32893189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2004/000518 Ceased WO2004082353A2 (fr) | 2003-03-11 | 2004-03-05 | Dispositif d'aspiration pneumatique |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20060153694A1 (fr) |
| CA (1) | CA2520806C (fr) |
| FR (1) | FR2852364B1 (fr) |
| WO (1) | WO2004082353A2 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2019953B1 (en) * | 2017-11-21 | 2019-05-27 | Bort De Graaf Koel En Klimaattechniek B V | Adjustable motive nozzle diameter adjustment for ejector |
| WO2019103608A1 (fr) * | 2017-11-21 | 2019-05-31 | Bort De Graaf Koel - En Klimaattechniek B.V. | Éjecteur |
| CN107956677B (zh) * | 2017-12-01 | 2022-12-30 | 中船黄埔文冲船舶有限公司 | 一种抽气装置及方法 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2399249A (en) * | 1944-10-24 | 1946-04-30 | Gen Tank Service Inc | Apparatus for the movement of viscous materials |
| US2623474A (en) * | 1948-12-31 | 1952-12-30 | Friedmann Giovanni | Injection mixer |
| US4595344A (en) * | 1982-09-30 | 1986-06-17 | Briley Patrick B | Ejector and method of controlling same |
| US4701108A (en) * | 1985-05-10 | 1987-10-20 | Daniel Scampini | Variable volume ejector with motive fluid pulser |
| JPH0353040Y2 (fr) * | 1987-05-30 | 1991-11-19 | ||
| DK158109C (da) * | 1988-02-04 | 1990-08-20 | Dems Eng | Omstillelig ejektor |
| JPH06185499A (ja) * | 1991-01-01 | 1994-07-05 | Smc Corp | 真空発生装置 |
| DE19817249C1 (de) * | 1998-04-18 | 1999-08-26 | Schmalz J Gmbh | Ejektor |
| DE29916531U1 (de) * | 1999-09-20 | 2001-02-08 | Volkmann, Thilo, 59514 Welver | Ejektorpumpe |
| DE10036045C1 (de) * | 2000-07-25 | 2001-10-04 | Festo Ag & Co | Vakuumerzeugervorrichtung |
| JP4132897B2 (ja) * | 2002-03-19 | 2008-08-13 | 株式会社日本ピスコ | 真空発生装置 |
-
2003
- 2003-03-11 FR FR0302968A patent/FR2852364B1/fr not_active Expired - Lifetime
-
2004
- 2004-03-05 CA CA2520806A patent/CA2520806C/fr not_active Expired - Fee Related
- 2004-03-05 WO PCT/FR2004/000518 patent/WO2004082353A2/fr not_active Ceased
-
2005
- 2005-09-28 US US11/237,451 patent/US20060153694A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| FR2852364B1 (fr) | 2006-07-21 |
| US20060153694A1 (en) | 2006-07-13 |
| FR2852364A1 (fr) | 2004-09-17 |
| WO2004082353A3 (fr) | 2004-10-28 |
| CA2520806C (fr) | 2012-07-31 |
| CA2520806A1 (fr) | 2004-09-30 |
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