WO1982001479A1

WO1982001479A1 - Device for mixing a first fluid with a second vehicle fluid

Info

Publication number: WO1982001479A1
Application number: PCT/FR1981/000141
Authority: WO
Inventors: Rene Foegle
Original assignee: Rene Foegle
Priority date: 1980-11-04
Filing date: 1981-11-03
Publication date: 1982-05-13
Also published as: DE3152465A1; CH650943A5; FR2493176B1; JPS57501666A; GB2097276B; GB2097276A; FR2493176A1; BR8108859A; NL8120419A

Abstract

Device for mixing a first fluid with a second vehicle fluid, comprising a unit for the removal of the first fluid from a container where the said fluid is stored, a unit for the dilution of the removed fluid into the vehicle fluid, and a unit for distributing the fluid mixture for the purpose of its later utilization, characterized in that the removal, the dilution and the distribution are effected by a single control device actuated by a pressure differential established in the circulation circuit of the vehicle fluid.

Description

Device for mixing a first fluid with a second carrier fluid.

The subject of the present invention is a device for mixing a first fluid with a second carrier fluid comprising a set for withdrawing the first fluid from a container in which it is stored, a set for diluting fluid withdrawn from the carrier fluid and an assembly for distributing the fluid mixture obtained for its subsequent use.

Devices of this type are already known, used for example in the food industry or, as a general rule, any installation in which it is necessary at a given moment to mix two fluids in given quantities.

In all that follows, it is understood that, within the meaning of the invention, it is intended to be able to be designated by "fluid" any liquid, gaseous, pasty or even solid product in the powder state, c 'is to say sus c ep tib le to flow.

The known devices are expensive, complex imperfect or born these s i t ent for the withdrawal of the first fluid stored in a container topping up such as for example a pressurized gas. This is impractical and also poses a risk in use, in particular for possible applications in public places.

The invention proposes to overcome these various drawbacks by a simple device, not requiring pou0 the control of the set of external appo rt other than the simple circulation of the carrier fluid.

In accordance with the invention, this result is obtained with a device for mixing a first fluid with a second carrier fluid, comprising a set for withdrawing the first fluid from a container in which it is stored, a set for diluting the withdrawn fluid in the carrier fluid and an assembly for distributing the fluid mixture obtained with a view to its subsequent use, characterized in that the withdrawal, dilution and distribution are ensured by a single control device actuated under the effect of a pres - d if f er ent i el le established in the vector fluid circulation network.

In all that follows, reference will be made to a vector fluid consisting of water, the circulation network of the vector fluid being in this case the water distribution network. In accordance with a preferred embodiment of the invention, the abovementioned control device will essentially consist of a piston able to move in a first cylindrical chamber, said piston being provided with a rod moving in a second cylindrical chamber being able to be placed in communication on the one hand with the container for storing the first fluid and on the other hand with the assembly for dilution and distribution, the two faces of the aforementioned piston being constantly subjected to the pressure of the carrier fluid.

The invention will be better understood with the aid of the description below of a preferred embodiment with reference to the appended drawings in which:

- Figure 1 is a longitudinal sectional view of the device according to the invention (scale 1/2 approximately);

- Figure 2 is a greatly enlarged longitudinal sectional view of the dilution device.

The device according to the invention is externally in the form of a housing (1) of generally cylindrical shape. This casing comprises an inlet orifice (2) for the first fluid, three orifices (3,4,5) in communication with the circulation network of the carrier fluid, an orifice (6) provided with a closing bolt, not shown , the plug possibly being able to serve as a flow adjustment, the orifice (6) serving to bring the carrier fluid to the second fluid, and finally an orifice (7) for expelling the mixture obtained.

The casing (1) is internally provided with two cylindrical chambers communicating with each other, respectively a large diameter chamber (8) and a small diameter chamber (9).

In the large diameter chamber (8) is arranged a piston (10) able to move longitudinally in said chamber, so as to determine two zones (11,12) separated in leaktight manner by a peripheral annular seal (13) piston. One of the zones (12) is in direct communication with the orifice (3), the other zone (11) being in communication with the orifice (4); the orifices (3) and (4) are in turn connected directly or indirectly to the network of the carrier fluid.

On the face disposed towards the zone (11), the piston (10) comprises a rod (14) capable of sliding in leaktight manner, by virtue of an annular seal (15), in the cylindrical chamber of small diameter (9). In this cylindrical chamber (9) dislodges the inlet orifice (2) of the first fluid. In this orifice is arranged a non-return ball valve allowing only the suction of the fluid out of its container.

In the cylindrical chamber (9) also opens a bore (16), the other end of which is in direct communication with the orifice (5) mentioned above. In the bore (16) are arranged two non-return valves (17) and (22), the latter being shown diagrammatically by one of its balls.

The bowl (18) of the valve (17) is integral with a cylindrical piston. (19), the other end (20) of which supports a cylindrical rod (21) which controls one of the balls of the second non-return valve (22). This valve is also double, for a function which will be explained later.

In addition, the orifices (6) and (7) end directly in the bore (16).

Finally, various adjustment systems have been provided such as:

- limitation of the piston stroke (10) by a screw (23),

- adjusting the flow rate of the orifice (7) by a screw (24),

- adjustment of the flow rate of the orifice (6) by a screw (25), or by the stopper of the or if ice as indicated previously.

In the embodiment of Figure 1, there is also shown a bore (26) connecting the orifices (60 and (7) and therefore ensuring the supply of the carrier fluid for its subsequent mixing in the orifice (7) with the second fluid.

The operation is as follows.

When establishing a maximum pressure in the carrier fluid circuit, for example when closing the water distribution circuit, the piston (10) is in the "left" position relative to FIG. 1.

If we come from this position to create a depression in the vector fluid circuit, which is connected to the orifices (3) and (4) remember, there comes a time when the piston, under the action of this depression , moves to the right with respect to Figure 1 and finally adopts the terminal position shown in Figure 1.

In doing so, a vacuum is created in the small chamber (9) which causes the ball of the non-return valve arranged in the orifice (2) to rise, and therefore suction of the fluid stored in its. content.

If now, from the position in FIG. 1, the initial pressure in the carrier fluid circuit is restored, there follows an opposite movement of the piston to the left. The effect of this movement is to expel the fluid contained in the chamber (9) through the valve (17) while also raising the piston (19) under the sole effect of the pressure. The fluid in the chamber (9) then flows through the orifice (7). By the upward movement of the piston (19), the rod (21) of the latter moves the ball of the non-return valve disposed in the bore (16), thus allowing the passage of carrier fluid to the orifice ( 6). When the pressure falls in the chamber (9), the piston (19) descends under the effects of gravity on the one hand and the pressure exerted by the carrier fluid on the bottom ball on the other hand and the valve interrupts l carrier fluid.

The double non-return valve (22) operates as shown below.

The upper ball of the valve ensures a non-return safety of the mixture or of one of the fluids in case the pressures come to reverse.

The lower ball prevents the carrier fluid from flowing until the rod (21) does not lift it.

More than one performance can be brought to the device described without departing from the scope of the invention.

Thus, it is conceivable to cause one or more different vector fluids to open into the same orifices (3), (4) and (5), or even to multiply the orifices, the different vector fluids being able to be subjected independently of one another. internal pressure variations allowing control of the main piston.

One can also consider withdrawing several fluids by multiplying the orifices (2), by placing them either longitudinally or on the periphery of the casing (1). In the same way there can exist a plurality of orifices type (6) and (7).

Finally the piston (10) can be actuated by all forms of energy which can directly or indirectly generate a pressure variation. The device according to the invention can therefore be actuated at specific times if it is possible to control and predict the pressure variations. In this case, the device may have to mix at least two fluids (at least one of which is a vector) at precise programmable times. If the carrier fluid pressure variations are not controlled, the device will ensure mixing and distribution of the mixture obtained at given but non-programmable times.

Finally, it is clear that the functions of the orifices (6) and (7) can be reversed.

Claims

1. Device for mixing a first fluid with a second carrier fluid, comprising an assembly for withdrawing the first fluid from a container in which it is stored, a dilution assembly for the fluid drawn in the carrier fluid and a distribution assembly of the fluid mixture obtained for its subsequent use, characterized in that the withdrawal, dilution and distribution are ensured by a single control device actuated under the sole effect of a differential pressure established in the circulation network of the carrier fluid, the mixing being carried out in the device itself.

2. Device according to claim 1, characterized in that the control device is essentially constituted by a piston (10) able to move in a first cylindrical chamber of large diameter (8), said piston (10) being provided with a rod (14) moving in a second cylindrical chamber of small diameter (9) which can be placed in communication on the one hand by an orifice (2) with the storage container for the first fluid and on the other hand with the dilution and distribution assembly, the rod (14) moving in the chamber (9) in a sealed manner, the piston (10) dividing the chamber (8) into two zones (11), (12) each of which they are connected by an orifice (4), (3), to the distribution network of the carrier fluid, the piston further comprising a peripheral annular seal (13).

3. Disp os itif according to any one of claims 1 and 2, characterized in that the expulsion of the first fluid from the chamber (9) and admission into the dilution assembly of the carrier fluid take place at through a bore (16) of the casing (1) in communication with two orifices (6) and (7), the expulsion of the first fluid taking place through a non-return valve (17) and the admission of the working fluid operating through a second non-return valve (22) the control of said second non-return valve being operated by the rod (21) of a piston (19) moving during the expulsion of the first fluid in the bore (16).

4. Device according to claim 3, characterized in that the orifices (6,7) are interconnected by a bore (26).

5. Device according to any one of claims 3 and 4, characterized in that the orifices (6) and (7) are provided with flow adjustment screws (24,25).

6. Device according to any one of claims 2 to 5, characterized in that the piston (10) includes a stroke limiter (23).

7. Device according to any one of claims 2 to 6, ca-acterized in that it comprises a plurality of orifices (2,3,4,5).

8. Device according to any one of claims 3 to 7, characterized in that it comprises a plurality of orifices (6,7).