EP1814671B1 - Coaxial supply system - Google Patents

Abstract

In a supply system fluids are supplied separated from each other to a delivery head through chambers (1, 3, 5) formed in a single supply line. In the delivery head a fluid mixture is produced and delivered to the outside in the form of mist. It is possible to deliver different fluids or fluid mixtures within individual cycles by a control.

Description

The invention relates to a supply system for fluids.

There are a variety of instances where it is necessary to deliver a fluid mixture to a body, a surface into a room, etc. to achieve a desired effect. In particular, the field of painting technology, the medical treatment of wounds with various treatment media, the field of air conditioning, laboratory technology for chemistry and / or biology, cleaning technology, used in fire fighting or in agriculture technology are mentioned as examples.

The prior art discloses systems having a plurality of hoses through which various fluids are supplied to be finally mixed in a mixing device and discharged to the outside.

For example, in the EP 0 673 683 discloses an air and liquid hose system for a handgun. In this system, a fluid hose and an air hose are connected to the handle of a paint spray gun.

From the publication WO 2004/008905 A1 a generic device for a color treatment of head hair by means of a spray of paint from a nozzle assembly is known. The nozzle arrangement is provided with a centric suction tube, a concentric paint spray channel and a concentric outer air jacket jet channel. The suction tube has an extension led out of the nozzle arrangement.

The publication WO 03/095097 A1 discloses a spray nozzle assembly having a longitudinal channel for supplying a liquid which is discharged via transverse passages into a chamber with air. From this chamber, the mixture of liquid and air is discharged through openings to the outside.

The publication WO 01/76764 A1 discloses a nozzle having an elongated channel and a chamber disposed therearound. From the channel openings lead into the chamber, through which a liquid is discharged into a gas flow in the chamber. The chamber tapers to an exit opening through which the mixture is discharged.

It is the object of the invention to provide a supply device with which a better mixing of fluids is achieved and with which the fluid mixture can be delivered to a flat area.

The object of the invention is achieved by a supply device according to claim 1. Advantageous embodiments are set forth in the dependent claims.

A fluid supply device according to the invention comprises one of a first chamber for supplying a first Fluid and a second chamber for supplying a second fluid existing fluid supply line. An end member serves to supply a fluid mixture to a surface to be exposed to the fluid mixture and has the first chamber with the first fluid and the second chamber with the second fluid. Between the chambers, a plurality of injection ports for discharging the first fluid into the second chamber is used. Between the second chamber and the outside discharge openings are provided. The two chambers in the region of the end element are formed flat, and the second chamber abuts in layers on the first chamber.

In particular, the cross section of the first chamber is formed in the form of a circle, while the second chamber are formed as a circular ring segment. Preferably, the center of the circle is identical to the center of the circle segment.

According to one aspect of the invention, a third or further fluids may be supplied through a third chamber or chambers. In particular, it is also possible to provide one of the chambers to discharge a fluid counter to the general supply direction.

According to one aspect of the invention, one end of the feed strand may be provided with a connection element. The connection element is fitted on the feed strand and seals its interior fluid-tight against the environment. In addition, the connection element has outer connecting pieces and inner coupling elements. In each case, a connecting piece is assigned to a coupling element and provided with a going through both components opening. The coupling elements are designed according to the chambers and are introduced into this so that the interior of the chamber is sealed fluid-tight with respect to the other chambers. Through the openings, the respective fluids are introduced or discharged from the outside into the chambers of the feed line.

It is also possible to make at least one of the connecting pieces curved, so that the central axis of the connecting piece is located at an arbitrary angle to the central axis of the connecting element. A preferred angle here is a right angle.

According to another aspect of the invention, a fluid dispenser may be provided at the other end of the feed line. In particular, this fluid delivery device may be formed by forming a plurality of injection ports in the one of the first and second chamber separating walls in an end portion of the supply strand to inject the pressurized fluid in the second chamber into the second chamber. A plurality of discharge ports are formed in the wall separating the second chamber from the outside to discharge the fluid mixture formed in the second chamber to the outside.

The geometry of the respective chambers can essentially correspond to the geometry of the chambers in the feed train.

In particular, the number of injection openings may correspond to the number of discharge openings. In addition, the injection openings are designed with the discharge openings substantially radially aligned.

Preferably, the injection openings are made smaller than the discharge openings. But it is also possible to form the injection openings at least as large as or larger than the discharge openings.

According to one aspect, the center axis of the injection and discharge openings is not perpendicular to the central axis of the supply / dispensing device but obliquely thereto.

According to one aspect of the invention, the injection and discharge openings may be formed with a circular cross-section. Alternatively, it is possible to form them with other cross-sectional shapes or with a combination of different cross-sectional shapes. Possible alternative cross-sectional shapes are e.g. as a circle, elliptical, oval, rectangular, formed as a circle segment, as a circular ring segment or as a star.

According to another aspect of the invention, a closure member may be provided to fluidly close the end of the fluid delivery device remote from the delivery string so that a fluid mixture may exit through the delivery ports alone. In particular, the closure element is such that a projection seals the second chamber in a fluid-tight manner with respect to all other chambers, while a fluid connection of the remaining chambers is produced via a cavity in the closure element. But it is also possible to form the closure element with a plurality of projections in such a way that all the chambers are closed against each other fluid-tight and a connection consists only through the injection openings between the first chamber and the second chamber.

Alternatively, it is also possible to seal all the chambers by means of the closure element and to produce the connection of the individual chambers via openings provided with valves.

For connection of individual supply devices or of supply lines and fluid delivery devices connecting devices may be provided. The connecting device has a connection device provided with a first and a second pipe element, and a connection device provided with a third pipe element and a fourth pipe element. In this case, the first tubular element with the third tubular element and the second tubular element with the fourth tubular element fluid-tight connectable.

In addition, an inner edge portion or an outer edge portion of the fluid-tight connectable tubular elements may be conical in order to establish the fluid-tight connection by the mating of the respective tube elements.

In one aspect, the first tubular element is disposed within the second tubular element and the third tubular element is disposed within the fourth tubular element.

The connecting device may comprise on the connecting device a sleeve element, on the inner surface of which a plurality of projections are formed which, when made, engage with recesses formed on an outer surface of the nozzle device to prevent inadvertent disconnection of the connecting device and the nozzle device.

In addition, the first and the second tubular element and / or the third and fourth tubular element in one piece be formed, wherein an apertured flange portion connects the two pipe elements. In addition, connecting walls may be provided between tubular elements in the connecting device and between the tubular elements in the nozzle device, so that the cross-sectional geometry corresponds to that of the feed strand or fluid delivery device.

The fluids injected from the first chamber into the second chamber are in particular liquids, while the second fluid in the second chamber is a gas. As a result, the fluid mixture released to the outside is present as mist.

The delivery system according to the invention can be used in particular in the painting technique, the medical treatment of wounds with various treatment media, the field of air conditioning, laboratory technology for chemistry and / or biology, cleaning technology, used in fire fighting or in agriculture technology.

• Fig. 1 (a) bis 1(i) Querschnittsansichten von verschiedenen Ausführungsbeispielen einer erfindungsgemäßen Zufuhrvorrichtung in einem Bereich eines als Abgabevorrichtung ausgebildeten Endabschnitts;
• Fig. 2 eine Querschnittsansicht einer erfindungsgemäßen Zufuhrvorrichtung in dem Bereich eines als Abgabevorrichtung ausgebildeten Endabschnitts gemäß eines weiteren Ausführungsbeispiels;
• Fig. 3 eine längsgeschnittene Ansicht eines Abschnitts der Zufuhrvorrichtung aus Fig. 2;
• Fig. 4 eine Draufsicht eines Abschnitts der Zufuhrvorrichtung aus Fig. 2;
• Fig. 5 eine dreidimensionale Ansicht eines als Stöpsel ausgebildeten Verschlusselements gemäß der Erfindung von der einem Zufuhrstrang zugewandten Seite;
• Fig. 6 eine Schnittansicht des Stöpsels aus Fig. 5;
• Fig. 7 eine Draufsicht des Stöpsels aus Fig. 5 von der dem Zufuhrstrang zugewandten Seite;
• Fig. 8 eine dreidimensionale Ansicht eines als Anschlussstöpsel ausgeführten Anschlusselements gemäß einem Ausführungsbeispiel der Erfindung von der dem Zufuhrstrang abgewandten Seite;
• Fig. 9 eine dreidimensionale Ansicht des Anschlusselements der Fig. 8 von der dem Zufuhrstrang zugewandten Seite.
• Fig. 10 eine entlang einer Symmetrieebene aufgeschnittene dreidimensionale Ansicht des Anschlusselements der Fig. 8 von der dem Zufuhrstrang zugewandten Seite.
• Fig. 11 eine Draufsicht des Anschlusselements der Fig. 8 von der dem Zufuhrstrang zugewandten Seite.
• Fig. 12 eine Draufsicht eines als Anschlussstöpsel ausgeführten Anschlusselements gemäß einem anderen Ausführungsbeispiel der Erfindung;
• Fig. 13 eine Schnittansicht des Anschlussstöpsels der Fig. 12;
• Fig. 14 eine Draufsicht einer Abgabevorrichtung gemäß eines Ausführungsbeispiels der Erfindung.
• Fig. 15 (a), 15(b) und 15(c) mögliche Querschnittsansichten der Abgabevorrichtung aus Fig. 14.
• Fig. 16 eine Draufsicht eines weiteren Ausführungsbeispiels einer Abgabevorrichtung, die der in Fig. 14 gezeigten Abgabevorrichtung mit Ausnahme der Form gleich ist.
• Fig. 17(a), 17(b) und 17(c) mögliche Querschnittsansichten der Abgabevorrichtung aus Fig. 16.

In the following, preferred embodiments of the invention will be described in detail with reference to the figures. Show it:

• Fig. 1 (a) to 1 (i) Cross-sectional views of various embodiments of an inventive Feeding device in a portion of an end portion formed as a dispenser;
• Fig. 2 a cross-sectional view of a feed device according to the invention in the region of an end portion designed as a dispenser according to another embodiment;
• Fig. 3 a longitudinal sectional view of a portion of the feeding device Fig. 2 ;
• Fig. 4 a plan view of a portion of the supply device Fig. 2 ;
• Fig. 5 a three-dimensional view of a stopper designed as a closure element according to the invention from the side facing a feed strand;
• Fig. 6 a sectional view of the stopper Fig. 5 ;
• Fig. 7 a plan view of the plug Fig. 5 from the side facing the feedstring;
• Fig. 8 a three-dimensional view of a terminal designed as a connection element according to an embodiment of the invention from the side facing away from the feed strand;
• Fig. 9 a three-dimensional view of the connection element of Fig. 8 from the side facing the feedstring.
• Fig. 10 a cut along a plane of symmetry three-dimensional view of the connecting element of Fig. 8 from the side facing the feedstring.
• Fig. 11 a plan view of the connection element of Fig. 8 from the side facing the feedstring.
• Fig. 12 a top view of a designed as a connection plug connection element according to another embodiment of the invention;
• Fig. 13 a sectional view of the connection plug of the Fig. 12 ;
• Fig. 14 a plan view of a dispensing device according to an embodiment of the invention.
• Figs. 15 (a), 15 (b) and 15 (c) possible cross-sectional views of the dispenser from Fig. 14 ,
• Fig. 16 a top view of another embodiment of a dispensing device, the in Fig. 14 shown dispenser is the same except the form.
• Figs. 17 (a), 17 (b) and 17 (c) possible cross-sectional views of the dispenser from Fig. 16 ,

Fig. 1 (a) to 1 (i) are enlarged cross-sectional views of a serving as a supply hose or in one end portion of the hose formed and serving as a dispenser dispensing head, hereinafter referred to in Fig. 1 (a) and Fig. 1 (b) shown cross section is described as an example.

Inside the tube are three coaxially extending chambers, wherein a first chamber 1 is surrounded by a second chamber 3 and a third chamber 5. In the dispensing head, a liquid is injected through injection openings 11 provided in the wall between the first chamber 1 and the second chamber 3 from the first chamber 1 into a gas present in the second chamber 3. The resulting fluid mixture is then discharged through provided in the outer wall of the chamber 3 discharge openings 13 from the second chamber 3 to the outside. The discharge openings 13 have a larger diameter than the injection openings 11. The immediate release under pressure to the outside creates a mist from the fluid mixture.

The injection openings 11 and discharge openings 13 are each formed in alignment and can be arranged at freely selectable angles to each other, such as. out Fig. 1 (b) is apparent. As a result, the mist can be emitted in an angle range corresponding to the angle covered by the injection openings or delivery openings.

Fig. 1 (b) shows in addition to the three chambers 1, 3, 5 and the injection and discharge ports 11, 13, a suction port 15 through which a fluid mixture is sucked and sucked against the general supply direction through the third chamber 5 of the hose from the dispensing head. The supply of fluids to the dispensing head and the suction from the dispensing head is performed by a digital controller controlled pump and explained in more detail later.

A provided in the third chamber 5 steel wire 7 serves as a reinforcement for the hose or the dispensing head. In particular, because of the steel wire 7, it is also possible to give the hose or the dispensing head a predetermined shape. The given shape is maintained by a plastic deformation of the steel wire 7.

Various examples of arrangements of spray angles and chambers are also known from the Fig. 1 (c) to 1 (i) can be seen, in which like elements are denoted by the same reference numerals, as in Figs. 1 (a) and 1 (b) ,

For the sake of clarity, the injection and discharge openings are in the Fig. 1 (b) to 1 (i) not indicated by reference numerals.

Fig. 1 (i) shows an embodiment of a dispensing head with alternately arranged chambers 3 for fluid supply and chambers 5 for sucking off the fluid or fluid mixture. The diameters of the discharge openings, which are formed in the outer wall of the chamber 3, are smaller than those of the suction openings, which are formed in the respective outer wall of the chambers 5. In the embodiment of Fig. 1 (i) a fluid supply takes place only through the outer chambers 3.

At all in the Fig. 1 (a) to 1 (i) shown embodiments, it is also possible to supply 3 different fluids in the individual chambers.

Fig. 2 to 4 show a part designed as a dispensing head of a supply device according to a second embodiment of the invention. The essential difference from the first embodiment is that the center axes of the injection openings 211 and the discharge openings 213 are not in a plane perpendicular to the central axis of the dispensing head, but are arranged obliquely thereto.

Out Fig. 3 It can be seen that the center axes of the injection and discharge openings 211, 213 are each arranged in alignment.

How out Fig. 4 it can be seen, the cross sections of the openings 211, 213 are formed as circular ring segments or as rectangular slots.

Fig. 5 to 7 show various views of a plug 30 designed as a closure element. The in the three-dimensional view of Fig. 5 shown plug 30 is for a dispenser with the in Fig. 1 (f) or Fig. 1 (h) shown cross-section provided. The plug 30 consists of a cylindrical jacket 33 with a concave bottom 35 and a projecting from the bottom projection 31. The inner diameter of the shell 33 corresponds to the outer diameter of the tube and closes with this fluid-tight.

The projection 31 tapers from the ground. By applying the plug 30 to the hose, the projection 31 is inserted into the chamber 3 to seal the chamber 3 in a fluid-tight manner against the chambers 1 and 5 such that a connection exists only via the injection openings 11.

As seen from the sectional view of Fig. 6 As can be seen, a space remains between the bottom 35 and the open end of the hose, since the bottom 35 of the plug 30 is concave. For this reason, there is a fluid connection between the chambers 1 and 5.

Fig. 7 is a top view of the plug Fig. 6 For example, for a feed train with the in Fig. 1 (f) or Fig. 1 (h) provided cross sections is provided.

8 to 11 show a terminal formed as a connecting plug 20, which is attached to the dispenser opposite end of the feed line. The in the FIGS. 8 to 11 also shown for a feed strand with the in Figs. 1 (d) and 1 (e) provided cross-sectional geometry provided.

The plug 20 also has a cylindrical wall 22 and a bottom 24. On the side facing away from the Züfuhrstrang side (outside) protrude from the bottom of a connecting piece 27 and a plurality of connecting pieces 29. To the connecting pieces 27, 29 not shown supply lines for fluids are connected.

A protrusion 21 projecting from the bottom on a side facing the feed strand (inner side) is assigned to a connecting piece 27, and a multiplicity of protrusions 25 protruding from the bottom on the inside are assigned to a connecting piece 29 in each case. Through each connecting piece 27, 29, the bottom and the respective associated projection 21, 25 are designed as passages channels 23, 24 are formed. The projections 21, 25 taper in the direction of the inside and serve as a coupling element according to the invention.

After the connector plug 20 has been attached to one end of the feed string, the projection 21 is inserted into the chamber 1 and the projections 25 are inserted into the chamber 3 and the chambers 5, respectively. As a result, the end of the feed line relative to the environment is sealed so that fluids only through the channels 23, 24 in the individual chambers 1, 3, 5 can be supplied or removed, as shown in the cutaway view of Fig. 10 and from the Fig. 11 is apparent.

FIGS. 12 and 13 show a plan view and a sectional view of another embodiment of a connection plug 20. This connection plug 20 has a connection piece 29, which lies substantially at a right angle to the central axis of the supply system. According to the embodiment shown, a projection 25 is provided for introduction into a chamber 3 of a feed device according to the invention, and through the channel 24 a fluid is introduced into the chamber 3.

Fig. 14 . 15 (ac) . 16 and 17 (ac) show a further embodiment of dispensing heads for different media, which are identical except for the shape in plan view. The dispensing head has two ports 105, 107, a first chamber 101 and below this a second chamber 103. A liquid is fed into the first chamber 101 via the first connection 105, while a gas is supplied directly into the second chamber 103 via the second connection 107.

In the entire area of an inner wall between the first chamber 101 and the second chamber 103, a plurality of injection ports 111 are also formed, while in an outer wall of the second chamber 103, the injection ports 111 corresponding discharge openings 113 are provided. These discharge openings 113 also have a larger diameter than the injection openings 101. By a certain curvature of the outer wall and parallel to the inner wall, it is possible to selectively set an angular range which is exposed to a mist formed by the dispensing head and discharged. Fig. 15 (ac) and 17 (ac) show exemplary embodiments for concave and convex curved, as well as trained walls.

Claims (14)

1. A supply device for fluids, comprising a fluid supply line consisting of a first chamber (1; 101, 201) for supplying a first fluid and a second chamber (3; 103; 203) for supplying a second fluid, and an end member for supplying a fluid mixture to a surface exposed to the fluid mixture including the firs chamber (1; 101, 201) with a first fluid and the second chamber (3; 103; 203) with the second fluid, wherein a plurality of injection ports (11; 111; 211) for delivering the first fluid into the second chamber (3; 103) are provided between the chambers (1, 3; 101, 103) and delivery ports (13; 113; 213) are provided between the second chamber and the outside,
   characterized in that
   the two chambers (1, 3; 101, 103) are flat-shaped in the area of the end member and the second chamber (3; 103) is adjacent to the first chamber (1; 101) in the form of layers.
2. The supply device according to claim 1, characterized in that the first chamber (1; 101) and the second chamber (3; 103) are formed by the axial division of the fluid supply line.
3. The supply device according to claim 2, characterized in that the chambers (1, 3; 101; 103) are formed coaxially.
4. The supply device according to any of claims 2 or 3, characterized in that the cross-section of the first chamber (1; 101) has the shape of a circle and the cross-section of the second chamber (3; 103) has the shape of a ring segment.
5. The supply device according to any of claims 2 to 4, characterized in that between a third chamber (5) and the outside a plurality of suction ports (15) are provided to suck in a fluid mixture through said third chamber (5) and to discharge it opposed to the feeding direction.
6. The supply device according to any of claims 2 to 5, characterized in that one end of the supply line is provided with a nozzle member (20) so as to supply the respective fluids through the latter into the corresponding chambers.
7. The supply device according to claim 6, wherein the nozzle member includes external pipe nozzles (27, 29) for the connection of external feed lines and includes internal coupling members (21, 25) adapted to be introduced into the respective chambers (1, 3, 5) in a tight-fitting manner, wherein the respective fluid is supplied through a passage (23, 24) guided through the respective pipe nozzle (27, 29), a bottom (26) and the respective coupling member (21, 25) into the corresponding chamber (1, 3, 5).
8. The supply device according to any of claims 1 to 7, characterized in that the injection ports (11; 111; 211) are smaller than the delivery ports (13; 113; 213).
9. The supply device according to any of claims 1 to 8, characterized in that the injection ports (11; 111; 211) and the delivery ports (13; 113; 213) are designed to be substantially radially aligned.
10. The supply device according to any of claims 1 to 8, characterized in that the central axes of the injection ports (11, 211) and the delivery ports (13, 213) are located at an angle of from 0° to 90°, preferably substantially at 90° or 60° or 45° or 30° with respect to the central axis of the delivery device, wherein a respective injection port (11, 211) is formed to be aligned with a respective delivery port (13, 213).
11. The supply device according to any of claims 1 to 10, characterized in that the cross-section of the injection ports (11; 111; 211) and the delivery ports (13; 113; 213) is circular or rectangular or oval or elliptical or formed as segment of a circle or as ring segment or star-shaped.
12. The supply device according to any of claims 1 to 11, characterized in that one end can be closed by a sealing member (30).
13. The supply device according to claim 12, characterized in that an internal projection (31) of the sealing member (30) seals a chamber (3; 103) against the first an third chambers (1, 5), whereas the first and third chambers (1, 5) are connected via a cavity of the sealing member (30) such that a fluid can flow from the third chamber (5) into the first chamber (1; 101).
14. The supply device according to claim 12, characterized in that the chambers (1, 3, 5) are sealed against each other by the sealing member, wherein between a third chamber (5) and a first chamber (1) a connection adapted to be closed by a valve is brought about so that the fluid can flow from the third chamber (5) into the first chamber (1; 101).

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