WO2014020191A1 - Underwater connection device - Google Patents

Underwater connection device Download PDF

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Publication number
WO2014020191A1
WO2014020191A1 PCT/ES2012/070604 ES2012070604W WO2014020191A1 WO 2014020191 A1 WO2014020191 A1 WO 2014020191A1 ES 2012070604 W ES2012070604 W ES 2012070604W WO 2014020191 A1 WO2014020191 A1 WO 2014020191A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
connection device
device according
cable
underwater
Prior art date
Application number
PCT/ES2012/070604
Other languages
Spanish (es)
French (fr)
Inventor
Marc RAMÍREZ QUINTANA
Domingo PEDRAZA PADILLA
Original Assignee
Sacopa, S.A. (Sociedad Unipersonal)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sacopa, S.A. (Sociedad Unipersonal) filed Critical Sacopa, S.A. (Sociedad Unipersonal)
Priority to PCT/ES2012/070604 priority Critical patent/WO2014020191A1/en
Publication of WO2014020191A1 publication Critical patent/WO2014020191A1/en

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46Bases; Cases
    • H01R13/52Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/523Dustproof, splashproof, drip-proof, waterproof, or flameproof cases for use under water
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66Structural association with built-in electrical component
    • H01R13/665Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6658Structural association with built-in electrical component with built-in electronic circuit on printed circuit board
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02Contact members
    • H01R13/03Contact members characterised by the material, e.g. plating, or coating materials

Abstract

The invention relates to an underwater connection device which includes a first cavity (3) for a first electric cable (6); a second cavity (4) for a second electric cable (7), said first cavity (3) being rotatable relative to said second cavity (4); and an electrical connection means (8) between the ends of said first cable (6) and said second cable (7); characterised in that said connection means (8) includes a printed circuit board (10) provided with at least one electrically conductive track (19), said printed circuit board (10) being secured to said second cavity (4); and at least one resilient electrically conductive contact (17, 18) rotatably secured to said first cavity (3), said contact (17, 18) being in contact with said at least one electrically conductive track (19) of said printed circuit board (10). The invention makes it possible to minimise wear, friction and electrical resistance between the contact and the conductive track.

Description

 UNDERWATER CONNECTION DEVICE DESCRIPTION

The present invention relates to an underwater connection device, which allows the electrical connection to a submerged element, for example a pool cleaner.

Background of the invention

To clean the bottom of the pools, cleaners or robots are used that move around the bottom for cleaning. These cleaners need an electric power source for their operation.

An underwater connection device is used to connect the power cable to the electric cable of the cleaner. These underwater connection devices have to solve two main problems: first they must be completely waterproof, since they will always be submerged during operation and, secondly, they must allow the rotation of the electric cable of the cleaner with respect to the power cable, since that the cleaner moves along the entire surface of the bottom of the pool and, if it does not allow this rotation, the cables could be rolled up and would prevent the correct movement of the cleaner.

Different underwater connection devices are known in the art that attempt to solve the problems indicated above.

For example, EP 1 383 205 A1 describes a submersible swivel cable connector comprising a first housing element that houses one end of a first electrical cable and a second element of housing that houses one end of a second electrical cable, said housing elements being coupled to each other in a fixed and sealed manner.

Unlike the present application, the electrical connection between said cables is made by a plurality of brushes in contact with contact surfaces.

The main drawback of the connector described in the aforementioned document is that the electrical connection is made by brushes, which are consumable elements that limit the useful life of the device. The dust generated by the wear of the brushes is conductive and, being confined within a watertight chamber, can be deposited forming short circuits between the different transmitted potentials, causing reliability problems.

In addition, due to its constructive shape, this connector is prone to present problems of tightness after intensive use. This is due to the fact that the removal of the electric power receiving apparatus is usually carried out by stretching from one end of the cable. This effort is transmitted to the other end of the cable through the connector, passing through internal elements that provide the seal, being able to deteriorate them and thus causing water ingress.

Therefore, the need for an underwater connection device that satisfactorily resolves the problems of maintenance, tightness and rotation of the cables with each other is evident, so that the cleaner to which electricity is supplied can move freely without the cable Roll up and hinder this movement.

Description of the invention With the underwater connection device of the invention, the aforementioned drawbacks are resolved, presenting other advantages that will be described below.

The underwater connection device of the present invention comprises:

- a first housing for a first electric cable;

- a second housing for a second electrical cable, said first rotating housing being in relation to said second housing; Y

- electrical connection means between the ends of said first cable and said second cable; and characterized in that said connection means comprise:

- a printed circuit provided with at least one electrically conductive track, said printed circuit being integral with said second housing; Y

- at least one elastic electrical conductor contact in rotation with said first housing, said electrical conductor contact being in contact with said at least one electrically conductive track of said printed circuit.

Thanks to this elastic characteristic of the electrical conductor contact, wear, friction and electrical resistance between the contact and the conductive track are minimized.

Advantageously, said at least one electrical conductor contact is mounted on a centering base, to which the end of said First electric cable. This centering base has the advantage that it avoids the short circuit between the contacts, and allows maintaining its concentricity and orthogonality with respect to the axis of rotation of the device.

According to a preferred embodiment, said connection means comprise two elastic electrical conductive contacts, one inside and one outside, in contact with both inner and outer conductive tracks of said printed circuit.

Preferably, said at least one elastic electrical conductor contact comprises at least one elastic pin that is in contact with the at least one conductive track of said printed circuit.

According to a preferred embodiment, said electrical conductor (s) contact (s) is / are of a copper and beryllium alloy, and said conductive track (s) of the printed circuit is / they are made of electrical conductive material covered with a silkscreen of lubricating material and conductor of electricity, such as graphite. The presence of a graphite silkscreen adhered to the track or conductive tracks acts as a lubricant and minimizes the resistance to the passage of electric current between the sliding contacts and the conductive tracks.

Preferably, the fixing of the end of the first cable is carried out by means of a split clamp comprising projections that are housed in complementary recesses provided in said centering base.

In addition, in the underwater connection device of the present invention, said first housing and / or said second housing preferably comprise a cable connection and anchoring element comprising a plurality of clips that are embedded in a sheath of said cable when introducing said connection and anchoring element inside the accommodation.

Advantageously, said connecting and anchoring element comprises a plug provided with an external thread complementary to an internal thread of said first and / or second housing.

According to a preferred embodiment, said clips are placed circumferentially around a bushing, wherein said bushing with the clips is coupled with a fixing guide provided with a plurality of grooves for said clips.

Advantageously, said connecting and anchoring element also comprises a sealing gasket compressed against the inner surface of said housing by introducing said connecting and anchoring element inside the housing.

In this way, simply by screwing the connection and anchoring element inside the housing, the desired sealing and mechanical anchoring is achieved, allowing the cable to be removed for removal of the device from the water, without having any influence on the internal components of the device , nor in the components that guarantee its tightness, since the effort applied to the sheath of one end of the cable is transmitted directly to the sheath of the other end through the outer shell of the connector.

To maintain the relative positions between the centering base and the printed circuit at all times, said first housing comprises in its lower part an anti-friction bushing arranged between said first housing and a first cover, and between said guide cover and said first cover is arranged an anti-friction cap. Furthermore, said centering base is advantageously guided in rotation by means of a guided cover placed on that basis.

To further ensure the tightness and freedom of rotation of the device of the present invention, between said guide cover and said first cover are arranged oil seals, between which a hydrophobic grease is placed.

Brief description of the drawings

For a better understanding of how much has been exposed, some drawings are attached in which, schematically and only by way of non-limiting example, a practical case of realization is represented.

Figure 1 is an exploded perspective view of the underwater connection device of the present invention, in which all the components of the device can be seen;

Figure 2 is an elevational view of the underwater connection device of the present invention sectioned;

Figure 3 in an exploded perspective view of the electrical connection means of the device of the present invention;

Figure 4 is an exploded perspective view of a connection and anchoring element of a cable of the device of the present invention; Y

Figure 5 is an elevational view of a connection and anchoring element of a sectioned cable.

Description of a preferred embodiment As can be seen in particular in Figures 1 and 2, the underwater connection device of the present invention comprises a main body 1, a first cover 2 placed on said main body 1, a first housing 3 for a first electric cable 6 and a second housing 4 for a second electrical cable 7.

The connection of said electric cables 6, 7 is carried out by means of two connecting and anchoring elements 5, which are identical to each other and whose structure will be described later in detail.

The connection device of the present invention also comprises connection means 8 for making the connection between said electric cables 6, 7. Said connection means will be described later in detail.

For example, the first electrical cable 6 may be a cable connected to an underwater robot, such as a pool bottom cleaner, while the second electrical cable 7 may be a power cable for electricity to the network.

To allow the movement of said underwater robot or the like, the assembly formed by the first housing 3, the connection and anchoring element 5 fixed to said first housing 3 and the connection means 8 (except the printed circuit 10 which will be described later) they are integral in rotation, that is, they rotate with respect to the rest of the components of the connection device of the present invention.

The first housing 3 guides the first electric cable 6 from the outside to the connection means 8 and guarantees the orthogonality of the axis of rotation of the device with respect to the printed circuit 10. The connection device of the present invention also comprises an anti-friction bushing 9 placed between the first housing 3 and the first cover 2, a guiding cover 1 1 to guide the rotation to said connecting means 8 and a second anti-friction bushing 12 placed between said guide cover 1 1 and said first housing 3. These anti-friction bushings 9, 12 minimize the mechanical resistance caused by friction between the first housing 3 and the assembly formed by the first cover 2 and the guide cover 1 1.

In addition, to further ensure the tightness and freedom of rotation of the device of the present invention, between said guide cover 1 1 and said first cover 2 are arranged oil seals 13, between which a hydrophobic grease is placed, and a seal 14.

The connection means 8, in particular its printed circuit 10, are supported by a support plate 15, and a sealing gasket 16 is arranged between the second housing 4 and the main body 1.

In figure 3 the components of the electrical connection means 8 can be seen in detail.

The electrical connection means 8 comprise sliding contacts (an internal contact 17 and an external contact 18) made of electrical conductive material, with an elastic behavior. It should be noted that it is not essential that all contact be elastic, but simply that a part of it is necessary, such as, for example, one or more elastic pins.

Its shape provided with elastic pins allows them to press on conductive tracks 19 of the printed circuit 10, and slide on them minimizing wear, friction and electrical resistance between contacts 17, 18 and printed circuit 10.

Additionally, a graphite screenprint is preferably applied to the printed circuit 10, which adheres to the conductive tracks 19, exerting lubricant and minimizing resistance to the passage of electric current between the sliding contacts 17, 18 and the conductive tracks 19 of the printed circuit 10.

The sliding contacts 17, 18 are housed in a centering base 20, preventing said contacts 17, 18 from being short-circuited, and maintaining their concentricity and orthogonality with respect to the axis of rotation of the device. The cable section whose conductors are electrically connected to the sliding contacts 17, 18 is fixed so that it is integral with the centering base 20 by means of the assembly formed by a split clamp 21 provided with screws 22 and nuts 23. To this, said clamp 21 comprises lower projections that are housed in complementary recesses in the centering base 20.

In figures 4 and 5 the components of the connection and anchoring element 5 can be seen in detail. These connection and anchoring elements 5, as indicated by their own name, have two functions: the electrical connection between the electric cables and the mechanical anchoring of said cables to the connection device of the present invention.

In certain applications, conductive cables covered by outer sheaths are used that give them greater mechanical resistance (to torsion, bending or tensile). The connection and anchoring element 5 allows these mechanical stresses to be transmitted directly from the cable 6, without being suffered by the electrical cable inside. In turn, it provides the seal between the electric cable 6 and the housing 3 by means of the compression of a gasket 27. With the connection and anchoring element 5 this double effect is achieved with a single threading operation, as will be described below.

The connection and anchoring element 5 comprises a plurality of clips 26 arranged in a bushing 25 in a circumferential manner and a fixing guide 29 provided with a plurality of grooves for said clips 26. The connection and anchoring element 5 also comprises a plug 24 externally threaded complementary to an internal thread of said housing 6.

By screwing said plug 24 inside the housing 6, the clips 26 that are embedded in the cable sheath 6, as the fixing guide 29 is pushed into the threaded housing 6. By means of this single tapping action, it achieves the correct fixation of the cable by means of the clips 26 and the correct sealing by means of the seal 27.

Although reference has been made to a specific embodiment of the invention, it is apparent to one skilled in the art that the described underwater connection device is susceptible to numerous variations and modifications, and that all the mentioned details can be replaced by others. technically equivalent, without departing from the scope of protection defined by the appended claims.

Claims

one . Underwater connection device, comprising:
- a first housing (3) for a first electrical cable (6);
- a second housing (4) for a second electrical cable (7), said first housing (3) being rotatable with respect to said second housing (4); Y
- electrical connection means (8) between the ends of said first cable (6) and said second cable (7); characterized in that said connection means (8) comprise:
- a printed circuit (10) provided with at least one electrically conductive track (19), said printed circuit (10) being integral with said second housing (4); Y
- at least one elastic electric conductor contact (17, 18) in rotation with said first housing (3), said electrical conductor contact (17, 18) being in contact with said at least one electrically conductive track (19) of said printed circuit (10).
2. Underwater connection device according to claim 1, wherein said at least one electrical conductor contact (17, 18) is mounted on a centering base (20), to which the end of said first electrical cable is fixed (6).
3. Underwater connection device according to claim 1 or 2, wherein said connection means (8) comprise two conductive contacts electric elastics, one inside (17) and one outside (18), in contact with each inner and outer conductive tracks (19) of said printed circuit (10).
4. Underwater connection device according to claim 1, wherein said at least one elastic electrical conductor contact (17, 18) comprises at least one elastic pin which is in contact with the at least one conductive track (19) of said printed circuit (10).
5. Underwater connection device according to any one of the preceding claims, wherein said electrical conductor contact (s) (17, 18) is / are made of a copper and beryllium alloy.
6. Underwater connection device according to claim 1 or 3, wherein said conductive track (s) (19) of the printed circuit (10) is (s) covered with a graphite screenprint .
7. Underwater connection device according to claim 2, wherein the fixing of the end of the first cable (6) is carried out by means of a split clamp (21) comprising projections that are housed in complementary recesses provided in said centering base (twenty).
8. Underwater connection device according to claim 1, wherein said first housing (3) and / or said second housing (4) comprises a connection and anchoring element (5) of the cable (6, 7) comprising a plurality of clips (26) that are embedded in a sheath of said cable (6, 7) when said connecting and anchoring element (5) is inserted inside the housing (3, 4).
9. Underwater connection device according to claim 8, wherein said connection and anchoring element (5) comprises a plug (24) provided of an external thread complementary to an internal thread of said first (3) and / or second housing (4).
10. Underwater connection device according to claim 8, wherein said clips (26) are placed circumferentially around a bushing (25).
eleven . Underwater connection device according to claim 10, wherein said bushing (25) with the clips (26) is coupled with a fixing guide (29) provided with a plurality of slots for said clips (26).
12. Underwater connection device according to claim 10, wherein said connection and anchoring element also comprises a sealing gasket (27) compressed against the inner surface of said housing (3, 4) when said connection and anchoring element is introduced (5) inside the housing (3, 4).
13. Underwater connection device according to claim 1, wherein said first housing (3) comprises in its lower part an anti-friction bushing (9) disposed between said first housing (3) and a first cover (2).
14. Underwater connection device according to claim 13, wherein said centering base (20) is guided in rotation by a guide cover (1 1) placed on said centering base (20).
15. Underwater connection device according to claims 13 and 14, wherein between said guide cover (1 1) and said first cover (2) an anti-friction bushing (12) is arranged.
16. Underwater connection device according to claims 13 and 14, wherein between said guide cover (1 1) and said first cover (2) are arranged oil seals (13), between which a hydrophobic grease is placed.
PCT/ES2012/070604 2012-08-03 2012-08-03 Underwater connection device WO2014020191A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/ES2012/070604 WO2014020191A1 (en) 2012-08-03 2012-08-03 Underwater connection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2012/070604 WO2014020191A1 (en) 2012-08-03 2012-08-03 Underwater connection device

Publications (1)

Publication Number Publication Date
WO2014020191A1 true WO2014020191A1 (en) 2014-02-06

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ID=50027302

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2012/070604 WO2014020191A1 (en) 2012-08-03 2012-08-03 Underwater connection device

Country Status (1)

Country Link
WO (1) WO2014020191A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4932882A (en) * 1989-06-21 1990-06-12 Steve Kang Rotary plug
WO2009029494A1 (en) * 2007-08-24 2009-03-05 Schilling Robotics, Inc. Submersible electrical cable connector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4932882A (en) * 1989-06-21 1990-06-12 Steve Kang Rotary plug
WO2009029494A1 (en) * 2007-08-24 2009-03-05 Schilling Robotics, Inc. Submersible electrical cable connector

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