JP2013537503A - Delivery module and method for filling delivery module - Google Patents

Abstract

The present invention is a delivery module (1) for two liquid products, having a first wall (31); slidable along the first wall (31) and having at least one outlet hole A first piston (64) forming a first chamber (30); and a second piston (61) dimensioned to be slidable along the second wall (21) The present invention relates to a delivery module. Coupling means (62) is provided for joining the two pistons together when the product is delivered, and at least one piston has a piston head (7) initially remote from the coupling means. And fixing means (641, 722) are provided for connecting the piston head to the coupling means.
[Selection] Figure 1

Description

The present invention is a delivery module for two liquid products,
A cylindrical first wall;
A first piston slidable along the first wall and forming a first chamber having at least one outlet hole;
A second piston dimensioned to be slidable along the second wall,
A coupling means for coupling the two pistons together when the product is delivered is provided,
It relates to a delivery module, wherein at least one piston initially has a piston head which is remote from the coupling means, and a fixing means is provided for connecting the piston head to the coupling means.

  The invention further relates to a method for filling a delivery module.

  The term “liquid product” in this application refers to any product that can be output by the delivery module, ie high viscosity product or gaseous product as well as solids dispersed in the gas.

  It is often necessary to separate the two products contained in one container until the point of use, for example to prevent unwanted chemical reactions between the products. In such a case, the two products are held in two chambers of a container that are separated from each other and are transported to a delivery hole by a two-circuit valve or two-circuit pump where they contact each other.

  Systems with two pistons are also known. A container with two pistons arranged one above the other, in which these pistons slide along the wall of the container, is known from German Utility Model No. 20 2007 004 662. A two-circuit pump is placed in the container. The first circuit of the pump is open at the top of the container. The second circuit is open in a pipe across the first piston, and the first piston can slide along this pipe. The first product is located in the space above the first piston, while the second product is located in the space between the first piston and the second piston. This device also has a relatively high risk that the two products will be carried in an incorrect mixing ratio.

  This disadvantage is avoided by connecting the two pistons in a mechanical manner so that when one piston is displaced, the other piston is also displaced in a corresponding manner. This technical solution continues from U.S. Pat. No. 3,915,345 or DE 20 07 199. In both cases, there is a central cylinder attached to the two-circuit valve. The two-circuit valve is mounted on a housing that is also cylindrical. A first piston slides along the inner wall of the central cylinder to form a first chamber, while a second circular ring-shaped piston is attached to the outer wall of the central cylinder by its central edge. And a second chamber formed by sliding along the wall of the housing by the outer edge. The two pistons are connected together. In the case of U.S. Pat. No. 3,915,345, the two pistons are connected by a double wall surrounding the bottom edge of the central cylinder. In a first exemplary embodiment of DE 20 07 199, two pistons are separated by a circular ring-shaped space and connected by a base plate at the lower end. The propellant required for the common displacement of the two pistons is located below the base plate or below the piston.

  In either case, filling the two chambers causes problems. Because of the size of the inlet hole, it is impossible to fill two chambers simultaneously, so it is necessary to fill one chamber first and then fill the other chamber. However, since the two pistons are connected together in a mechanical manner, when one chamber is filled, the piston located therein is pushed down and the other piston is lowered together. A second chamber is formed and filled with air. As a result, the air entering the second chamber must be removed before the second chamber is filled with product.

German utility model No. 20 2007 004 662 specification U.S. Pat. No. 3,915,345 German Patent Application Publication No. 20 07 199

  Accordingly, it is an object of the present invention to produce a delivery module as described in the introduction, which is easier to fill, and to produce a method for filling such a delivery module. is there.

  This object is achieved in that the second wall is formed by a housing into which the delivery module can be inserted and the second piston and the second wall form a second chamber having at least one outlet hole. .

  The first and second walls are preferably cylindrical, but other developments are also conceivable, for example walls with an oval cross section.

  The problem of filling such a type of delivery module for two liquids is solved by first separating the two pistons so that they do not join together during the filling operation. The lowering of the piston of the chamber that is initially filled does not lead to the lowering of the piston head that has not yet been joined. Then, as soon as the second liquid is filled, the second piston head is lowered and coupled to the coupling means.

  In the present invention, it is claimed that the second wall is an integral component of the delivery module, and the second piston and the second wall form a second chamber having at least one outlet hole. Thus, the second chamber is an integral component of the delivery module.

  As an alternative to this, it is also possible that the second wall is formed by a housing into which the delivery module can be inserted, and that the second piston and the second wall form a second chamber having at least one outlet hole. .

  In connection with the present invention, the side facing away from the corresponding chamber in the operating state of the outlet hole of the piston head is moved to the side located opposite to the corresponding chamber in the operating state of the outlet hole of the other piston. At least one pressure balancing hole is provided in the coupling means.

  This pressure balancing hole prevents a vacuum from being created when the first liquid is filled into the delivery module.

  In the framework of the present invention, removal means connected to the outlet hole of the chamber are provided.

  In this context, the extraction means comprises a two-circuit valve or a two-circuit pump, the first circuit is connected to the outlet hole of the first chamber, and the second circuit is connected to the outlet hole of the second chamber. Conveniently connected to.

  One development of the invention is that the take-out means comprises a metering device.

  It is also advantageous to provide closing means having an open position and a closed position for closing the outlet holes of the first chamber and the second chamber.

  In the case of a further development of the invention, the chamber with the piston head is still in a state where the first piston is fully inserted into the first chamber in the direction of the outlet hole and is ready for filling. It is dimensioned so that there is sufficient space for the head not to be connected to the coupling means.

Also in the framework of the present invention, a method for filling a delivery module as described in the claims of the present invention, comprising the following steps: a1) the first piston is at the outlet of the first chamber Assembling the delivery module so that it is located closest to the hole and in a position where the piston head is not connected to the coupling means;
b1) If the delivery module does not yet have a second cylindrical wall, if necessary, inserting the delivery module into the housing to form a second chamber;
c1) filling the first liquid into a chamber not provided with a piston head or, if both chambers are provided with a piston head, selectively filling one of the two chambers; And d1) filling the second liquid in the still empty chamber provided with the piston head with sufficient pressure to provide a connection to the coupling means of the piston head at the end of the filling operation. There is also a method.

  One development of the invention consists in that, prior to step c1), in step c0i), the removal means or closure means are applied to the outlet holes of the two chambers.

  Another development of the invention consists in that, prior to step c1), in step c0ii) the delivery module is introduced into the interior of the container whose inner wall does not function as a wall for the second chamber. .

  In the present invention, prior to step c1), in step c0iii) it is claimed to introduce pressurized gas into the housing.

  As an alternative, it is also possible to introduce pressurized gas into the housing in step e1) after step d1).

  Exemplary embodiments of the present invention are described below with reference to the drawings.

Fig. 3 shows an exploded view of a delivery module according to the claims of the present invention. Fig. 4 shows a side cross-sectional view of the container during assembly. FIG. 3 shows a side cross-sectional view of the container according to FIG. 2 in a fillable state. FIG. 3 shows a side cross-sectional view of the container according to FIG. 2 with the first product filled into the second chamber. FIG. 3 shows a side cross-sectional view of the container according to FIG. 2 after the second product has been filled into the first chamber. Fig. 3 shows a side cross-sectional view of the container according to Fig. 2 after it has been emptied. Fig. 3 shows a perspective sectional view of the outer casing. Fig. 3 shows a perspective sectional view of the inner casing. The perspective sectional view of a piston unit is shown. The perspective sectional view of the head of the 1st piston is shown. FIG. 6 shows a perspective cross-sectional view of a stopper for a second piston. An enlarged view of the valve housing is shown.

  The delivery module (1) shown comprises two chambers (20, 30) which are attached to the valve (4) of the container (5), which is preferably a pressure vessel. Each chamber (20, 30) is provided with a piston (61, 64 and 7). A coupling means (62) is provided for coupling the two pistons (61, 64 and 7) together so that they are moved simultaneously once the chamber is full. The valve (4) is preferably second until the product contained in the first chamber (30) exits the valve (4) (or possibly exits from an outlet hole attached to the valve (4)). This is a two-circuit valve so that the product from the chamber (20) is not touched.

  The delivery module (1) substantially comprises an inner casing (3) in which a first piston (64) slides to form a first chamber (30) and a lower region (21) as a second piston. An outer casing (2) in which (61) slides to form a second chamber (20), coupling means (62) for integrally coupling the two pistons (61, 64 and 7); And holding means (8) functioning as a stopper for the two pistons (61).

  The outer casing (2) is composed of a first lower cylindrical part (21) and a second upper cylindrical part (22) having a smaller diameter. The two cylindrical portions are integrally connected by a radial connecting wall (23). In the exemplary embodiment shown, the wall of the upper cylindrical part (22) slightly enters the upper part of the first cylindrical part (21) by penetrating the radial wall (23). . This protrusion (25) functions as an upper stopper for the second piston (61). However, it is considered possible to omit this protrusion and use the radial wall as a stopper. The upper cylindrical portion (22) has a ring-shaped radial step (26) in the upper region thereof, and one or more holes (261) pass through the step (26). . In this way, the outer casing has been realized in a tubular manner with openings at both ends. A channel (24) is disposed on the inner surface of the upper cylindrical portion (22). The channel (24) extends over the entire height of this upper part (22). Fixing means (27) for attaching the delivery module (1) comprising two chambers to the two-circuit valve (4) is provided on the upper surface of the second cylindrical part (22). This fixing means (27) comprises a top provided with latching means which can interact with the mating latching means located on the two-circuit valve (4).

  The inner casing (3) is substantially composed of a cylindrical main body (31) having an outer diameter substantially matching the inner diameter of the upper cylindrical portion (22) of the outer casing (2). The cylindrical body (31) is tapered in its upper region, preferably by forming a frustoconical wall (32), terminating in the cylindrical part forming the sleeve (33). Just like the outer casing (2), the inner casing has a tubular form with openings at both ends. The sleeve (33) has a ring-shaped radial groove (331) that opens outward, and the diameter and height of the bottom of this groove (331) is the upper cylindrical part of the outer casing (2). This corresponds to the inner diameter and height of the ring-shaped step (26) of (22). As a result, until the sleeve (33) engages with the central hole of the ring-shaped step (26), the step (26) engages with the groove (331). It can be inserted inside the upper cylindrical wall (22) of the outer casing (2). In this way, the inner casing (3) is mounted in a fixed manner inside the outer casing (2). The length of the inner casing (3) is selected so that the lower end is aligned with the lower end of the upper cylindrical portion (22) of the outer casing (2) in a state where it is fixed to the outer casing (2). The inner casing (3), together with the channel (24), serves the purpose of defining outlet piping for the product contained in the second chamber (20). For this purpose, the channel (24) is dimensioned to open into a space located above the frustoconical wall (32) and below the ring-shaped step (26).

  Two pistons are combined in one piston unit (6). The second piston (61) has a radial ring-shaped portion attached to the lower end of the cylindrical portion (62). The radial ring-shaped part has at its edge an axial rim (63) extending starting from the side of the ring-shaped part facing away from the cylindrical part (62). The outer diameter of the rim (63) corresponds to the inner diameter of the lower part (21) of the outer casing. The rim (63) is provided with sealing means for sealing the piston (61) against the inner surface of the lower part (21) of the outer casing (2). This sealing means is realized, for example, as a free-flowing, highly viscous sealing means in the form of a sliding gel or a sealing lip (631) made of, for example, an elastomer material. The outer diameter of the cylindrical portion (62) of the piston unit (6) substantially corresponds to the inner diameter of the inner casing (3).

  In this way, the second chamber (20) is located on the one hand between the cylindrical lower part (21) of the outer casing and the cylindrical diameter part of the piston unit (6) and on the other hand the second piston ( 61) and a ring-shaped space located between the lower wall (23) and the radial wall (23) connecting the upper part (22) of the outer casing.

  The second piston (61) can slide inside the lower cylindrical portion (21) of the outer casing (2). Once all parts of the delivery module (1) have been inserted into the outer casing (2) so that the second piston (61) does not come out of the lower cylindrical part (21) of the outer casing (2) In this case, the holding means (8) is attached to the lower end. This holding means (8) is realized as an axial rim (81) having an inner diameter substantially coinciding with the outer diameter of the lower cylindrical part (21) of the outer casing. This axial rim (81) extends in its lower region to a ring-shaped radial wall (82) towards the center. The holding means (8) is attached to the lower end of the lower part (21) of the outer casing (2) by, for example, latch means. As a result, the first position (see FIG. 3) where the piston (61) hits the radial wall (23) of the outer casing (2) and the lower rim (63) is the ring of the holding means (8). Can be displaced between a second position (see FIG. 4) against the wall (82).

  The first piston (64) is formed by the upper surface (64) of the cylindrical portion (62) of the piston unit (6). This cylindrical part (62) thus functions as a coupling means that allows the two pistons (61, 64) to be displaced simultaneously.

  A separate piston head (7) is attached to the upper surface of the first piston (64). The piston head (7) is substantially composed of a radial circular wall (71) that extends downward by a rim (72). A sealing means is provided on the outer surface of the rim in the form of a sealing lip (721). The outer diameter of the rim (72) corresponds to the inner diameter of the cylindrical main body (31) of the inner casing (3).

  As a result, the first chamber (30) is defined by one and the other, the space between the inner surface of the inner casing (3) and the upper surface (32) of the inner casing (3) and the piston head (7). The piston head (7) also functions as a seal ring at the top of the second chamber (20).

  The piston head (7) includes a latch means (722) that allows the piston head (7) to be fixed in an irreversible manner to a mating latch means (641) disposed on the upper surface of the piston unit (6). . This latching means (641, 722) is dimensioned such that a sufficiently strong pressure must be applied to the piston head (7) for fixing to the upper surface of the piston (64), and in a preferred aspect it occurs. One or more grid elements can be provided that can offset the tolerance of possible filling. In this way, unwanted engagement is avoided, especially during storage or handling of an empty delivery module. Furthermore, the height of the cylindrical body portion (31) of the inner casing (and hence the height of the upper portion (22) of the outer casing) is such that the piston unit (6) is connected to the second piston (61) in the radial direction. When located in the upper position against the wall (23), it is selected such that there is sufficient space inside the inner casing for the cylindrical part (62) and the free unengaged piston head (7). The

  During assembly, first the inner casing is attached to the outer casing, the piston head (7) is inserted into the inner casing (3), and the piston unit (6) is then moved as far as possible, i.e. first. The second piston (61) is inserted until it hits the connecting wall (23). In this state, the piston head (7) is positioned above the upper portion of the piston unit (6) without being fixed. The sealing means (631, 721) of the two pistons (61, 64) hold the piston unit (6) and the piston head (7) in their respective positions until the product is filled. Sufficient pressure is applied.

  Such a unit comprising two chambers is intended to be attached to a delivery means such as a two-circuit valve (4) or a two-circuit pump. It is also possible to provide only closing means that are opened during the delivery operation. The delivery means may comprise metering means so that a predetermined amount of each product is output when the delivery means is activated. Two-circuit valves are known, for example, from the documents US Pat. No. 3,915,345 or WO 2007/132107. In the example shown here, this is a two-circuit valve of the kind described in the last cited document. Therefore, the method of operation of this valve will not be described in further detail.

  As in the case of the two-circuit valve of document WO 2007/132017, the valve (41) is such that when the valve is activated, gas can escape from the second chamber (20) along the same path as the product. It is possible to provide one or more openings in the body. This does not prevent the propellant from being supplied with a third product that does not react with the propellant. Therefore, the container accommodates the three products spatially separated during storage.

  A unit consisting of a delivery module (1) comprising two chambers and delivery means (4) can then be attached to the housing (5). If the dimensions of the delivery unit (1) (especially the outer diameter of the outer casing (2)) and / or the diameter of the valve disk (44) of the delivery means allow, the delivery module (1) can be mounted on a prefabricated housing. Can be inserted into the inner area. Otherwise, the housing (5) needs to be realized around the delivery module (1). This is the case of the example shown in the drawing.

  The ratio between the initial volume of the first product and the second product is determined by the ratio between the areas of the first piston (64) and the second piston (61). Thus, the delivery module allows for a very high level of accuracy required for the ratio between the initial volumes of the two products. It is also possible to fill the second chamber (30) with a pressure higher than the external pressure as a result of the area ratio between the areas of the first piston (61) and the second piston (64).

  Obviously, the first piston (61) may be realized with a separate piston head. In that case, the piston head is ring-shaped. The height of the lower cylindrical part (21) of the outer casing and / or the cylindrical part (62) of the piston unit is such that the ring-shaped piston head is not It must be large enough not to be fixed to the piston unit (6). When the second piston (61) has a separate piston head, it is not always necessary to provide a separate piston head (7) for the first piston (64).

  When the delivery module (1) is used in a pressure vessel as in the example shown here, the unit including the delivery unit (1) and the delivery means (4) is connected to the valve disk (44). It may make sense to place the housing (5) in a sturdy position without being connected to the housing (85). This allows the propellant to be filled during filling before the valve disk (44) is secured to the housing (5). In order to secure the unit comprising the delivery module / delivery means in said position (as shown in FIG. 2), the tip of the second cylindrical part (22) of the outer casing is on the inner surface of the upper surface of the housing (5) A fork (9) is provided to block the unit to abut. For this purpose, this removable fork (9) enters a groove (28) provided below the fixing means (27) at the tip of the outer casing (2).

  The principle of the removable piston head may also be in the case of devices such as those described in DE 20 07 199 or US Pat. No. 3,915,345. In this case, the delivery module (1) comprises one first chamber (30) in which the first pistons (64 and 7) slide, one second piston (61), and coupling means (62). And only consists of The wall forming the second chamber is not combined with the delivery module. The wall forming the second chamber is constituted by the inner wall of the housing (5), for example. Again, the piston head can be selectively used for the first chamber or the second chamber that is not yet embodied.

  The filling of the delivery module claimed in the present invention will be described with reference to FIGS.

  FIG. 3 shows a container with a delivery module (1) attached to a two-circuit valve (4), with the two-circuit valve (4) attached to the neck of the housing (5). Yes. Gas has already been brought into the housing, exerting pressure on both the piston head (7) and the second piston (61) of the first piston (64). Now the container can be filled with two products. In this connection, the first product is filled into the second chamber (20) without a separate piston head, first by the second circuit of the delivery means (4) and then by the channel (24). Is done. The piston unit (6) is pushed back when the second piston (61) is pushed by the entering product. A separate piston head (7) remains in the initial position, i.e. the upper region of the first chamber (30), while the upper part of the piston unit (6) is pushed downward by the second piston (61). It is. A pressure balancing hole (642) in the upper part (64) of the piston unit prevents a vacuum from being formed between the stationary piston head (7) and the upper part moving downward. At the end of the filling operation of the second chamber (20), as shown in FIG. 4, the rim (63) of the second piston (61) is attached to the ring-shaped radial wall ( 82).

  The second product can then be filled into the first chamber (30) by the first circuit of the valve (4), the faucet (43), and the sleeve (33). The entering product pushes down the piston head (7). The gas in the space between the inside of the cylindrical part (62) of the piston unit is pushed out at the upper part of the piston unit by the pressure balancing hole (642). The pressure exerted on the piston head (7) by the second product is sufficient to overcome the resistance of the latch means (641, 722) and fix the piston head (7) to the piston unit (6). Thus, it is only possible for the two pistons (61, 64) to be joined together and moved simultaneously. This corresponds to the situation shown in FIG. In addition, the spray head must be in place on the valve rod (45), possibly with a protective cap mounted on it. The container is ready for use. Thanks to a separate piston head (7), the container can be filled with air before filling the first chamber as required in the case of the device according to the prior art with two chambers in two separate filling units. It can be filled without the need for suction.

  Thus, the method can be summarized in the following steps.

  a1) Preparation of delivery module. The piston unit is arranged as close as possible to the outlet hole (or plurality of outlet holes) of the first chamber (30). This ensures that the piston head (7) is disengaged from the coupling means (62). The delivery module (1) is located in the state shown in FIG. 3, the take-out means (4) and the housing (5) are omitted.

  b1) If the delivery module (1) does not have a second chamber as in the above case, the delivery module must be inserted into a cylindrical wall that functions as the outer wall of the second chamber . Cylindrical walls can be formed by the housing of the container as in US Pat. No. 3,915,345 or German Offenlegungsschrift 20 07 199.

  c0i) If the liquid is withdrawn by means of withdrawal such as a two-circuit valve (4) or a two-circuit pump, or if the outlet hole of the chamber is simply closed by a plug, such withdrawal means or closure means It makes sense to install it before filling with liquid.

  c0ii) If the delivery module is to be placed inside the container, the inner wall of the container does not function as the wall of the second chamber and should preferably be done prior to filling with liquid.

  c0iii) If the container is to be pressurized, it is possible to fill the container with gas before the delivery module or removal means is connected to the container from step b0) or step c0ii).

  c1) The first liquid is filled into the second chamber (20). If the piston head is not located in the first chamber, but rather in the second chamber, the first chamber is filled first. If a piston head is provided in both chambers, it may start from either the first chamber or the second chamber.

  d1) The second liquid is brought into the first chamber (30) with sufficient pressure such that the piston head (7) is connected to the coupling means (62) at the end of the filling operation. If the piston chamber (7) is provided in the second chamber, the second liquid is brought into the second chamber. If both chambers are provided with piston heads, the chambers that are still empty are filled.

  e1) If the container should be pressurized but no gas is introduced in step c0iii), after filling with liquid, it is possible to bring the gas through the opening at the bottom of the container which is closed by a stopper.

It will be understood that the chambers (20, 30) are not formed until the product is filled. A chamber having a separate piston head (in this case, the first chamber (30)) is not implemented simultaneously with the other chamber (in this case, the second chamber (20)). Rather, it is not formed until the second product is filled. As a result, there is no need to provide a suction device for removing air from the chamber filled with the second product (in this case, the first chamber (30)) prior to filling the second product. Compressed gases such as elemental, oxygen, and compressed air, and liquefied gases such as hydrocarbons (eg, butane and isopentane), dimethyl ether, and fluorinated hydrocarbons are specifically considered as propellants for product discharge can do. However, it is also possible to discharge the product by a mechanical system such as a spring or an elastic material having a restoring force such as an elastomer.

  As an alternative to this, the valve disc (44) can be secured to the pressure vessel housing (5), and then the delivery module (1) can be filled and then filled with gas through the opening at the bottom of the pressure vessel which is closed later. Is possible. If the gas is filled from above, it must be allowed to flow to the bottom, for example by a channel provided for this purpose.

Finding application areas for delivery modules as claimed in the present invention, for example in the area of technology or medicine, or in the area of medical products, food, cosmetics, personal hygiene, herbicidal or insecticides, disinfectants or bleaches. it can. Furthermore, it is possible to realize very diverse product concepts, depending on the reaction system, eg gas generating systems (eg CO ₂ ), curing systems (eg chain extension, crosslinking, coagulation, polymerization, etc.) Is a chemical reaction in the area of polyurethane chemistry), gelation systems that can be accompanied by changes in viscosity, production of active substances (eg chlorine, hypochlorous acid, H ₂ O ₂ , sulfur, iodine), enzyme systems, acids It can provide a base system, a temperature changing system (eg an exothermic or endothermic mixture) or an adhesive system Further product concepts include emulsions, dispersions, water-in-oil, oil-in-water, water-in-oil-in-water, perfume, additive color mixing (AM), active substance mixtures (eg vitamins), colorants (eg objects and body parts Coloration), effective sterilization mixtures, and the creation of mixtures and specific material properties such as specific flow or sliding properties.

DESCRIPTION OF SYMBOLS 1 Delivery module 2 Outer casing 21 1st cylindrical part (lower part)
22 Second cylindrical part (top)
23 radial connection wall 24 channel 25 protrusion 26 radial ring-shaped step 261 hole 27 fixing means 28 groove 3 for removable fork inner casing 31 cylindrical main body 32 conical trapezoidal part 33 sleeve A ring-shaped groove 4 in the radial direction 42 A valve 41 of two circuits 41 A valve body 42 A flange-shaped portion 43 A faucet-shaped portion 44 A valve disk 45 A rod 5 A housing 6 A piston unit 61 A second piston 611 A ring-shaped groove Groove 62 Cylindrical portion 63 Seal rim 631 Seal lip 64 First piston 641 Latch means 642 for piston head Pressure balance hole 7 First piston head 71 Radial wall 72 Seal rim 721 Seal lip 722 Latch means 8 Holding means 81 Axial rim 82 Radial ring-shaped groove 9 Fork that can

Claims (12)

A delivery module (1) for two liquid products,
A first cylindrical wall (31);
A first piston (64) slidable along the first wall (31) and forming a first chamber (30) having at least one outlet hole;
A second piston (61) dimensioned to be slidable along the second wall (21);
A coupling means (62) is provided for coupling the two pistons (61, 64/7) together during product delivery, and at least one piston (64) is initially removed from the coupling means (62). Having a piston head (7) that is remote, and fixing means (641, 722) are provided for connecting the piston head (7) to the coupling means (62);
The second wall is formed by a housing into which the delivery module (1) can be inserted, and the second piston (61) and the second wall form a second chamber (20) having at least one outlet hole. The sending module, characterized in that:   The side facing away from the corresponding chamber (30) in the operating state of the outlet hole of the piston head (7) is opposite to the corresponding chamber (20) in the operating state of the outlet hole of the other piston (61). 2. Delivery module (1) according to claim 1, characterized in that at least one pressure balancing hole (642) is provided in the coupling means (62) for connection to the side located at.   3. Delivery module (1) according to claim 2, characterized in that a take-out means (4) connected to the outlet hole of the chamber (20, 30) is provided.   The removal means comprises a two-circuit valve (4) or a two-circuit pump, the first circuit is connected to the outlet hole of the first chamber (30), and the second circuit is in the second chamber. Delivery module (1) according to claim 3, characterized in that it is connected to an outlet hole (20).   Delivery module (1) according to claim 4, characterized in that the take-out means comprise a weighing device.   Closing means are provided for closing the outlet holes of the first chamber (30) and the second chamber (20), the closing means having an open position and a closed position, Delivery module (1) according to claim 4 or 5.   With the first piston (30) fully inserted into the first chamber (30) in the direction of the outlet hole and ready for filling, the piston head (7) still remains in the coupling means (62). Delivery module (1) according to one of the preceding claims, characterized in that the chamber (30) with the piston head (7) is dimensioned so that there is sufficient space for it not to be connected. 1). A method for filling a delivery module according to claim 1, comprising:
a1) The first piston (64) is arranged such that the first piston (64) is closest to the outlet hole of the first chamber (30) and the piston head (7) is connected to the coupling means (62). Assembling the delivery module (1) so that it is not in a position;
b1) If the delivery module does not yet have a second cylindrical wall (21), if necessary, the delivery module (1) is inserted into the housing to form the second chamber (20). And steps to
c1) The first liquid is filled into the chamber (20) where the piston head (7) is not provided, or when both the chambers are provided with a piston head, either of the two chambers is used. Selectively filling steps,
d1) The filling of the second liquid into the still empty chamber (30) provided with the piston head (7) is connected to the coupling means (62) of the piston head (7) at the end of the filling operation. Performing at a sufficient pressure for the method.   9. Method according to claim 8, characterized in that, prior to step c1), in step c0i), the removal means (4) or closing means are applied to the outlet holes of the two chambers.   Prior to step c1), in step c0ii), the delivery module (1) is introduced into the interior of a container whose inner wall does not function as a wall for the second chamber. The method according to 8 or 9.   11. A step according to one of claims 8 to 10, characterized in that, prior to step c1), in step c0iii), pressurized gas is introduced into the housing (5) from step b1) or step c0ii). Method.   11. A step according to one of claims 8 to 10, characterized in that, after step d1), in step e1), pressurized gas is introduced into the housing (5) from step b1) or step c0ii). the method of.

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