ES2685769T3 - Flood safety device for home appliances, particularly for washing machines - Google Patents

Abstract

An anti-flooding safety device (1) for an electrical household appliance comprises a connector body (2,40), connected to which are the first ends of a first flexible pipe (20) and a second flexible pipe (30), at least one part of said first pipe (20) extending longitudinally inside said second pipe (30). The two pipes (20,30) are of a corrugated type, and the device (1) comprises at least one safety solenoid valve (4), mounted on the connector body (2). At least one end portion of said first pipe (20) is coupled to a first end portion (21a) of a tubular element (21,23), preferably made of elastic synthetic material. The tubular element (21,23) has at least one axial stretch of surface structured so as to engage with an axial stretch of surface of the first pipe (20). A second end portion (21b) of the tubular element (21) is engaged or fitted on a coupling part (2a) of the connector body (2,40).

Description

5

10

fifteen

twenty

25

30

35

40

Four. Five

fifty

55

60

65

DESCRIPTION

Flood safety device for household appliances, particularly for washing machines.

The present invention relates to a flood safety device for household appliances, in particular washing machines. This invention has been developed with special reference to the devices of the aforementioned type designed for use between a source of supply of a liquid and an appliance.

The use of an appliance powered by a liquid, or through which a liquid circulates, generally entails the risk of flooding of the place where it is installed due to possible accidental leaks. Such leaks may be due, for example, to improper operation of the internal devices of the household appliance or to a failure of the pipes for feeding or discharging the liquid.

In the context of the above objective, anti-flood devices are known that can provide virtually continuous control of the presence of possible leaks. Said devices are usually made up of at least one valve, operating upstream of a water inlet tube and by detecting means, arranged in a water collecting tray, arranged in the home appliance itself. In the case of improper operation of the internal devices of the household appliance, the leakage water reaches said collecting tray, with the consequent intervention of the detecting means, provided to control the closing of the aforementioned valve.

The valves used for this purpose are usually operated in an electrical, mechanical or pneumatic way and the detecting means are usually of an electromechanical type (for example, based on the use of a float and a microswitch) or in any other way basically of a type mechanical (for example, based on the use of an anhydrous sponge, designed to expand when in contact with a liquid).

Some safety devices are also provided with an outer tube, which surrounds the water intake duct. In the event of failure of the latter, the outer tube allows confluence in the collecting tray, mentioned above, of the leakage liquid so as to cause the closure of the safety valve (see, for example, document FR-A- 2,742,514). In other solutions, the defined space between the two tubes is designed to retain the leakage water directly, instead of transporting it to a collecting tray. In a first type of these two-tube devices, the presence of water, inside the space, produces an increase in the volume of an anhydrous sponge, which controls, consequently, the closing of the device valve (see, for example , document IT-BI 207 365). Other two-tube devices are, instead, simply predisposed to retain water and visually signal their presence within the space to inform the user regarding the need for a technical assistance intervention (see, for example, document DE-A- 10 12 6104).

In devices known from the prior art, the water intake tube, that is, the inner tube, is usually a tube with smooth surfaces, made of polyvinyl chloride (PVC), with other possible reinforcing fiber materials. The outer tube is usually a wavy tube, which is usually made of polypropylene (PP). One of the main problems encountered in safety devices, according to the prior art, is represented by the poor flexibility of the inner tube, made of PVC, which, in the case of small radius of curvature of the outer tube, tends to form cocas or compressed by itself, producing a sharp reduction in the passage section for the liquid. A coca or local compression can determine excessive pressures in the water intake tube, which cannot be detected directly by the user and are potentially detrimental to the integrity of the device and to the proper functioning of the home appliance. Traditional pipes, made of PVC, are also relatively expensive and heavy.

The main objective of the present invention is to overcome the drawbacks mentioned above. This and other purposes are also achieved, according to the present invention, by means of a flood safety device and by a corresponding preferred manufacturing process that presents the characteristics of the appended claims, which constitute an integral part of the descriptive content of the present patent application. .

Other objectives, features and advantages of the present invention will be apparent from the following detailed description and the accompanying drawings, which are provided solely by way of explanatory and non-limiting example and in which:

- Figure 1 is a schematic view, in partial cross section, of a flood safety device according to the present invention;

- Figure 2 is a schematic view, in partial cross-section, of a water intake tube that is part of the device shown in Figure 1 and

- Figures 3 to 5 are schematic cross-sectional views of molding apparatus that can be

5

10

fifteen

twenty

25

30

35

40

Four. Five

fifty

55

60

65

use for the purpose of manufacturing parts of the tube shown in Figure 2, in three different operating states.

With the numerical designation 1, as a set, a flood safety device for household appliances according to the invention is shown in Figure 1. The device 1, which is, in particular, indicated for use in combination with household washing appliances, such as a dishwasher, comprises a connector body 2, a water intake tube 20 or an inner tube and an outer tube 30.

The connector body, or valve body, is preferably made of plastic or thermoplastic material and defines, inside, a conduit 3 for the passage of water. The body 2 is configured so that the conduit 3 has an inlet 3a and an outlet 3b, between which a part of the conduit extends, where means for interrupting the water supply are operative. In the example shown, said means comprise a solenoid valve 4.

The solenoid valve 4 is of a type and has a form of operation known per se (see, for example, document FR-A-2 742 514). In this description it will suffice to point out that the solenoid valve 4 has an electromagnet 5 provided with supply terminals, one of which is designed by reference 6. The solenoid valve 4 comprises an opening / closing element 7, actuated by means of an armature or mobile core 8, which is housed in a corresponding body 9. The latter has a threaded part, in an open seat provided with an inner screw, which is provided in the body 2 and opens in the conduit 3. The electromagnet 5, which is, in a preferred embodiment, enclosed in a covering protector 10 obtained by overmolding of thermoplastic material, is mounted on the body 9. When the electromagnet 5 is not supplied, the opening / closing element 7 - by the mobile core 8 - is maintained by the action of a spring in a position of rest, which does not allow the passage of water from inlet 3a to outlet 3b. In the case of feeding the electromagnet 5, on the other hand, the core 8 is induced to move to overcome the antagonistic force of the spring mentioned above; in this case, the opening / closing element 7 is designed to assume an opening position, which allows the flow of water through the conduit 3.

In the upper area of the valve body 2, in which the inlet 3a is defined, an outer ring nut 11 is mounted for coupling the device 1 to a water supply source, such as a tap (not shown). Mounted on the upper part of the conduit 3, upstream of the solenoid valve 4, are a filter 12 and a flow regulator 13. The lower area of the valve body 2 has a substantially cylindrical coupling part 2a, in which it is defined output 3b. On the outer surface of said part 2a annular teeth or relief reliefs 2b are defined.

According to the main aspect of the invention, the inner tube 20 is a corrugated tube, that is, a tube with a corrugated wall. In practice, the outer surface of the tube 20 (but also the inner surface) is defined by a series of reliefs and recesses, preferably annular and parallel to each other and arranged according to a regular series. Said reliefs and recesses could instead have a spiral configuration along the tube 20.

In the embodiment represented in Figures 1 and 2, the wall or the cross-section of the tube 20 has a configuration with a square profile, that is, with reliefs and recesses that are defined by contiguous stretches of the wall, which are substantially orthogonal each other (a kind of "square wave"). Alternatively, the reliefs and recesses mentioned above could have a substantially trapezoidal profile, that is, at least in part delimited by slightly inclined or diverging sections of the wall. The tube 20 could also have a configuration similar to that shown for the outer tube 30, with a substantially rounded outer profile, that is, with reliefs and recesses by radial sections of the wall, which are semicircular or similar to an arc of circumference (a kind of "sine wave").

The inner corrugated tube 20 is preferably made of polypropylene. A tube of this class has flexibility characteristics, understood as the capacity for deformation without compressing or forming cocas or local curvatures, obviously better than traditional water intake pipes made of PVC. On the other hand, a corrugated tube, of the type mentioned above, has elastic characteristics that are lower than those of PVC pipes. For this reason, according to a preferred feature of the invention, at least one end part of the inner tube 20 is coupled with a first end part 21a of a respective tubular connecting element, collectively designated by reference 21. The tubular element 21 it has, in its part 21a, an axial section of the inner surface structured for coupling with an axial section of the outer surface of the tube 20. The tubular element 21 has a second end part 21b designed to engage or adapt in the coupling part 2a of the body 2. As can also be seen in Figure 2, the inner surface of the element 21 defines, in part 21a, a regular series of reliefs and recesses, wherein the surface reliefs of the element 21 are inserted in the recesses of the outer surface of the tube 20, while the reliefs of the outer surface of the tube 20 are inserted into the surface recesses of the tubular element 21. Due to the characteristics mentioned above, the mechanical coupling and the hydraulic seal between the tube 20 and the tubular element 21 are excellent.

5

10

fifteen

twenty

25

30

35

40

Four. Five

fifty

55

60

65

In the preferred embodiment of the invention, the tubular element 21 is molded with, or overmoulded directly on, the end section of the tube 20, so that part of the inner surface of the tubular element 21 and part of the outer surface of the tube 20 are practically complementary to each other. The tube 20 and the tubular element 21 can be joined together as a result of adhesion or bonding of the respective constituent materials, which can be of compatible types for said purpose.

The second end part 21b of the tubular element 21 is, as mentioned above, installed on the part 2a of the valve body 2, where the reliefs 2b are provided. In the outer part of said zone 21b a mechanical fixing component 22 is preferably installed, constituted, for example, by a metal bushing, which can be deformed locally by tightening the tubular element 21 on the part 2a of the body 2.

It should be appreciated that the presence of the reliefs and the recesses of the tubular element 21, although preferred, is not strictly necessary for the purposes of carrying out the invention. In other words, also the inner surface of the part 21a of the element 21 can be substantially smooth, in which case at least one mechanical element is provided, designed to fix or grip said part 21a externally in the tube 20. Said element of grip, preferably in an annular shape, can be of conceptually similar construction to component 22 or in any way constituted by a suitable section or extension of said component 22.

The material constituting the tubular element 21 is, in a preferred embodiment, an elastic synthetic material, such as an elastomer (for example, Santoprene®) to allow easy installation of the element itself in part 2a of the body 2.

In the non-limiting example shown, the upper end of the tube 20 is not directly in contact or installed in the part 2a of the body 2. For this purpose, the tubular element 21 may have an intermediate part between the end parts 21a, 21b, which defines the outlet 3b in fluidic communication with the tube 20. In this way, the risk is avoided that any curvature of the tube 20, in the vicinity of the part 2a of the valve body 2, is such that it impairs the quality of the hydraulic seal and of the mechanical coupling between the two parts in question.

Obviously, there is no rule regarding the assembly or installation of the corrugated tube 20 directly on the body part 2a, in which case a suitable outer gripping element of the type described above or any other element is provided in a preferred embodiment in the extreme part of the tube 20 and in the part of the body 2a there is an overmoulded material that covers them.

The corrugated outer tube 30 encloses or surrounds, at least in part, the tube 20 and performs the function of collecting and / or retaining and / or transporting the leakage water in the event of failure of the tube 20 or any other element in the case of occasional leaks from body 2 or from element 21. As can be seen, there is a space 31 between the two tubes 20, 30 designed to receive the leakage water, to be able to retain and / or transport it even when it is under Pressure. In the embodiment shown in Figure 1 by way of example, an electric cable 32 is extended in space 31, whose conductors 32a, 32b, are connected, at their first respective ends, to the terminals 7 of the valve of solenoid 4. The second ends of the conductors 32a, 32b are provided with respective terminals 33a, 33b, for connection to the control system of the device or control system of the home appliance with safety interlocking, comprising, in a form of preferred embodiment, detecting means for detecting water leaks of a known prior art equipment.

In other versions of the anti-flood safety device (not shown), the electric cable 32 could be connected, instead of a valve, to other elements of the device itself and in particular, to the means of determining interest (constituted, for example, by a sensor to detect the presence of liquid that operates inside the space 31 or anywhere else by means of a flowmeter, which operates along the tube 20 or upstream thereof, for example associated with the body 2).

In the preferred embodiment shown, the electromagnet 5 of the valve 4 is directly coated with an insulating and protective coating 40, made of thermoplastic material. The liner 40 also covers, at least in part, the valve body 2, substantially in accordance with the technique described in document FR-A-2 742 514 cited above.

In its lower area, the liner 40 forms a substantially cylindrical coupling part 41, on whose outer surface coupling teeth or projections 41a are formed, similar to those present in part 2a of the body 2. In the embodiment shown, a part of the upper end of the outer tube 30 is coupled with the part 41 of the liner 40 by a respective hollow connecting element, designated by 42.

The element 42 performs the functions of coupling and closing substantially similar to those of the tubular element 21. In this perspective, also the connecting element 42 has, on the inner surface of one of its first end portions 42a, a series of reliefs and recesses , coupled with the recesses and reliefs defined on the outer surface of the corrugated outer tube 30. A second end portion 42b of the element 42 is installed,

5

10

fifteen

twenty

25

30

35

40

Four. Five

fifty

55

60

65

on the other hand, in part 41 of the liner 40. Also in this case, a deformable metal bushing 43 is provided, in a preferred embodiment, at the local level, to grip the element 42 in the part 41. The element of connection 42 can also be overmolded on the respective end section of the outer tube 30 and made of an elastic synthetic material, such as Santoprene®.

It should be appreciated that, in addition, the variant embodiments mentioned above in relation to the tube 20 and the tubular element 21, with respect to the profile of the projections and the recesses, can be applied to the tube 30 and the corresponding connecting element 42 smooth shaping of the inner surface of part 42a, the provision of an outer gripping element for part 42a, which is configured as a component, by itself or in any other way, as an extension of element 43 and so on.

As can be seen in Figure 2, the lower end of the corrugated inner tube 20 can also be provided, if necessary, with a tubular element 23, similar in construction to the tubular element previously designated by 21. In the same way, also the lower end of tube 30 may be provided with an element similar to element 42 or otherwise, element 21 or 23.

As mentioned above, in a preferred embodiment of the invention, element 21, 23 can be overmoulded directly on the end zone of tube 30 and / or 20. Schematically illustrated in Figures 3 to 5, an apparatus or Possible mold that can be used for that purpose. The apparatus, designated as a set by reference 50, comprises three parts and, in particular, a central part or insertion element 51 and two peripheral mold halves 52, 53. Each mold half 52, 53 has a respective impression 52a , 53a (Figure 5), which is to define a respective part of the outer profile of the element 21. The remaining part of the profile of the element 21 is defined, however, in part, by the insertion element 51 and partly, directly by an end zone of the tube 20. Formed in the mold half 52 there is a conduit 54 for injection of the molding or overmolding material.

As can be seen in Figure 5, the insert 51 has a cylindrical part 51a with a distal end 52b with reduced diameter or cross-section, configured to allow partial penetration at the end of the corrugated tube 20 in order to thus provide a tight seal. suitable to prevent the possibility that the overmolding material will penetrate inside the tube itself during the injection process. The maximum diameter of the end 51b may be slightly larger than the internal diameter of the tube 20. For the purpose of forming the tubular element 21, the end of the tube 20 is installed in the part 51a of the insert 51 with the two halves of mold 52, 53 in the open position, that is, divaricates (as shown in Figure 5). This operation is followed by the closing of the mold halves 52, 53 with the apparatus 50, which, thus, becomes in the state that can be seen in Figure 3. Thus, the impressions of the halves of molds 52, 53 delimit, together with the insertion element 51 and the length of the tube 20 inside the apparatus 50, a space 55 designed to receive the material to be injected through the conduit 54.

Immediately after the injection, as can be seen in Figure 4, the material completely fills the aforementioned space 55, thus forming the tubular element 21 directly in the tube 20. A first inner surface of the part 21a of the element 21, provided with reliefs and recesses, is determined by the external shape of the tube 20, while a second inner surface of the part 21b of the element 21, which is substantially smooth, is determined with the cylindrical part 51a of the insert 51. Thus, at least part of the inner surface of the element 21 assumes a shape that is complementary to the outer surface of the tube 20. Immediately after a suitable time to cool / harden the injection material, the mold halves 52, 53 are opened, as can be seen in Figure 5, and the tube 20, with the element 21 coupled, can slide out of the insert 51.

Obviously, an apparatus conceptually similar to that illustrated in Figures 3 to 5 will be used for the purpose of overmolding the connecting element 42 in the corrugated outer tube 30 or otherwise, for the purposes of molding, in the corrugated tube 30, other elements (not shown), preferably made of elastomer. An apparatus conceptually similar to that illustrated in Figures 3 to 5 can also be used for the purpose of molding only a tubular element 21, designed to be subsequently mounted on the corrugated tube 20, using, for example, the elastic properties of the material elastomeric with which said element is preferably manufactured. In said variant, the apparatus 50 is provided with an insertion element 51 which has a different shape from that shown by way of example or in any way, is provided with an additional insertion element, which has, at least in part, the external shape of the corrugated tube 20 or that otherwise has a completely smooth cylindrical surface (in accordance with the objective of providing a tubular element 21 with an inner surface that has reliefs and recesses that is, in any other way, completely smooth ).

The safety device, according to the invention, is less expensive to manufacture than the devices according to the prior art, thanks to the replacement of the water intake pipe reinforced with polyvinyl chloride with a simpler construction tube, which needs a reduced quantity of lower cost material that has less weight. The fact that both tubes of the device, according to the invention, can be formed with the same material, in particular polypropylene, simplifies the arrangement of the product at the end of its useful life. The elimination of the water inlet tube, made of polyvinyl chloride, allows, therefore, to obtain main advantages

5

10

fifteen

twenty

25

30

35

40

Four. Five

also from the ecological point of view. The use of an internal corrugated tube prevents any risk of compressing or the formation of local cocas, typical of the prior art, with obvious advantages in terms of reliability and safety of the device. The tubular connection element, when considered, simplifies the mechanical coupling modalities and the tight seal of the inside of the corrugated tube to the valve body of the device.

The preferred field of application for the invention is that of flood safety devices provided with electrical, mechanical, or pneumatic cutting means. In principle, the invention is, in any case, suitable for use also in relation to flood safety devices without valve means or that can be associated with independent cutting means, for example, of the type with simple visual warning or type provided only with means for the detection of an anomalous situation (such as means for detecting water leaks or means for measuring the flow, without the need for the provision of a valve). The device, according to the invention, can be used advantageously, in household appliances, such as washing machines and dishwashers, but is also generally applicable to other types of household appliances connected to a liquid supply source (such as, for example, refrigerators provided with beverage or cold water dispensers).

It will be apparent that numerous variants can be introduced for one skilled in the art for the device described by way of example, without thereby departing from the scope of the inventive idea, as defined in the appended claims.

According to a possible variant embodiment, elements 21 and 42 are made in one piece. The element 21 or 42 may possibly exert a sealing action on both tubes 20, 30. The formation of the corrugated tubes of the device 1, with one and the same material, may allow a suitable seal between them (for example, if they are overmolded with a single material, preferably an elastomeric material, which is glued or attached to both corrugated tubes 20 and 30 and / or at least part of the body 2 and / or its liner 40).

Elements 21 and 42, or the single body that integrates them, could also be configured as a molded part in itself, subsequently installed in tube 20 and / or tube 30. Under this perspective, according to another possible variant, the elements mentioned above can be formed with material designed to contract after being installed in the tube 20 and / or 30, for example after a thermal stress (heat shrinkable materials) or after the cessation of an effort, for example, a mechanical stress or thermal (materials with shape memory effect).

As stated above, the safety valve means presenting the device according to the invention can also be operated pneumatically or mechanically. In some of these applications, instead of the cable 32, inside the space 31, an air duct (for example, a small flexible duct) can be extended or a suitable transmission (for example, a Borden cable with its corresponding sheath) to be able to transmit the pneumatic or mechanical order from the sensor means provided to the valve means.

The tubular element 21 could be overmoulded in the tube 20 and the connection element 42 could subsequently be overmolded in a part of the element 21 and in a part of the outer tube 30.

The device according to the invention can possibly comprise a plurality of corrugated tubes 20, 30 connected to each other in series, for example through means of immediate connection. Said solution is considered in the case of modular safety devices or provided with sections or of the type in which the valve body is arranged in an intermediate position between two sections of the corrugated tube 20, 30.

Claims (15)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 1. Flood safety device for an appliance, in particular for loading or admitting a liquid into the appliance, the device comprising (1) a connector body (2, 40), a first flexible tube (20) and a second flexible tube (30), in which in the connector body (2, 40) a conduit (3) is defined in fluidic communication with the first flexible tube (20), the first flexible tube (20) being provided for transporting a liquid, and in which at least a part of the first flexible tube (20) extends longitudinally inside the second flexible tube (30), so that at least part of the two flexible tubes (20, 30) a space (31) is defined, which is capable of transporting and / or retaining a possible leakage liquid, the two flexible tubes (20, 30) being impervious to the liquid, the flood safety device also comprising connection means (21, 22; 23) between the connector body (2) and the first flexible tube (20), in which - at least one end part of the first flexible tube (20) is coupled with a first end part (21a) of a tubular element (21; 23) that forms part of said connection means (21,22; 23), and - the tubular element (21; 23) has a second end part (21b) coupled or fitted on a coupling part (2a) of the connector body (2, 40), said flood safety device being characterized in that - the first flexible tube (20) is a corrugated tube, and - the tubular element (21, 23) is configured as an overmolded component on the first corrugated flexible tube (20), and is made from an elastic synthetic material, such as an elastomer. 2. Flood safety device according to claim 1, further comprising cutting means (4) for cutting the liquid, in which in particular the cutting means (4) are mounted on the connector body (2) and result operating in a section of the conduit (3) that is intermediate between an inlet (3a) and an outlet (3b) thereof, in which, in particular, extending into the space (31) means (32) are provided for transmitting to the cutting means (4) a closing instruction, said means being, in particular, of an electric, pneumatic or other mechanical type. 3. Flood safety device according to claim 1 or claim 2, further comprising detection means (33a, 33b). 4. Flood safety device according to at least one of the preceding claims, - comprising at least one electric wire or cable (32), which in particular extends at least partly in said space (31) and / or at least partly outside the first flexible corrugated tube (20) and / or between the first flexible corrugated tube (20) and the second flexible tube (30). 5. Flood safety device according to claim 1, wherein the tubular element (21, 23) has at least one axial section of structured surface so as to engage with an axial section of surface of the first flexible corrugated tube (20 ), in which in particular said surface sections each have an alternation of reliefs and recesses. 6. Flood safety device according to claim 5, wherein - the reliefs of the surface section of the tubular element (21, 23) are coupled in recesses of the surface section of the first corrugated flexible tube (20), and the reliefs of the surface section of the first corrugated flexible tube (20) are coupled in the recesses of the surface section of the tubular element (21, 23), and / or - said reliefs and recesses have a substantially annular shape and are substantially parallel to each other or have a spiral pattern, and / or - said reliefs and recesses have a substantially square, or rounded, or sinusoidal, or trapezoidal profile, and / or - said surface sections are substantially complementary to each other, and / or - said surface sections are substantially joined together. 7. Flood safety device according to claim 1, wherein said first end portion (21a) of the tubular element (21, 23) has a surface substantially complementary to a surface of said at least one end portion of the first flexible corrugated tube (20), and wherein said at least one end part of the first flexible corrugated tube (20) is arranged axially at a distance from the coupling part (2a) of the connector body (2, 40), the tubular element (21) presenting an intermediate part between its first and second end parts (21a, 21b) which provides in fluidic communication an outlet (2b) of the connector body (2, 40) with said at least one end part of the First flexible corrugated tube (20). 5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 8. Flood safety device according to claim 1 or claim 7, wherein: - said at least one end part of the first flexible corrugated tube (20) extends inside said first end part (21a) of the tubular element (21), and / or - fitted on the tubular element (21) there is at least one external fixing or clamping component (22), wherein, in particular, on said at least one of the first and second end portions (21a, 21b) of the tubular element (21) a fixing component (22) is adjusted, operative to retain the tubular element ( 21) in the coupling part (2a) of the connector body (2, 40), or on said at least one end part of the first flexible corrugated tube (20). 9. Flood safety device according to one or more of the preceding claims, wherein at least one end part of the second flexible tube (30) is coupled with a first end part of a connecting element (42), the element presenting of connection (42) at least one axial section of structured surface so that it can be coupled with an axial section of surface of the second flexible tube (30). 10. Flood safety device according to claim 9, wherein - said surface sections each have an alternation of reliefs and recesses, the reliefs of the surface section of the connecting element (42) being coupled to the recesses of the surface section of the second flexible tube (30), and the reliefs of the surface section of the second flexible tube (30) coupled in the recesses of the surface section of the connecting element (42), and / or - the connecting element (42) has a second end part coupled or fitted on an additional coupling part (41) made in the connector body (2, 40) or in a liner (40) of the latter, in which in particular on the second end part of the connecting element (42) a mechanical fixing component (43) is fitted, operative to keep the connecting element (42) in position in the coupling part (41) of the connector body ( 2, 40) or its coating (40), and / or - the connection element (42) operates in a fluid-tight manner in both flexible tubes (20, 30) and / or the connection element (42) is overmoulded in both flexible tubes (20, 30). 11. Flood safety device according to claims 1 and 9, wherein: - the tubular element (21) and the connection element (42) are made in one piece, and / or - the connection element (42) is at least partially molded over the tubular element (21) and on the second flexible tube (30), and / or - the connecting element (42) is made of an elastic synthetic material, in particular an elastomer, and / or - the tubular element (21, 23) and / or the connection element (42) is made of a material designed for contracting after a thermal stress, such as a heat shrinkable material, or after the cessation of mechanical or thermal stress, such as a material with shape memory effect. 12. Flood safety device according to claim 1, wherein the tubular element (21) operates in a fluid-tight manner in both flexible tubes (20, 30) and / or is overmolded on both flexible tubes (20, 30 ). 13. Method for manufacturing a flood safety device (1), according to one or more of the preceding claims, comprising the following steps: i) providing a connector body (2, 40) having a coupling part (2a); ii) provide a first flexible tube (20); iii) provide a second flexible tube (30), and iv) coupling the first flexible tube (20) and the second flexible tube (30) with the connector body (2), with at least a part of the first flexible tube (20) extending longitudinally inside the second tube (30) ) flexible, in which: - step iv) comprises the operations of providing the tubular element (21), coupling the first end part of the tubular element (21) with said at least one end part of the first flexible tube (20) and coupling the second end part (21b) of the tubular element (21) on the connection part (2a), characterized in that the first flexible tube (20) is a corrugated tube, the tubular element (21) is made from an elastic synthetic material, such as an elastomer, and the coupling operation of the first end part 5 of the tubular element (21) with said at least one end part of the first corrugated flexible tube (20) comprises the operation of overmolding the tubular element (21) on said first corrugated flexible tube (20). 14. The method of claim 13, wherein step iv) comprises the operations of coupling the connecting element (42) with the second flexible tube (30) and adjusting the connecting element (42) on the part 10 additional connection (41), the coupling operations of the connecting element (42) with the second flexible tube (30) comprising the overmolding of the connecting element (42) on the second flexible tube (30). 15. A method according to claim 13 or 14, wherein an overmolding operation is provided, comprising fitting an end portion of the first corrugated flexible tube (20) onto a part (51b) of an element 15 (51) belonging to a molding apparatus (50), further comprising, in particular, the operation of overmolding the injection operation of an overmolding material in a cavity (55) of the apparatus (50), said element (51) and said end portion of the corrugated flexible tube (20) projecting therein.