FR3127852A1 - Sealing barrel for an electric cable - Google Patents

Abstract

Sealing barrel for an electric cable Sealing barrel (5), configured to be traversed by an electric cable and comprising a seal (52) mounted in a ring (51) and comprising a sleeve (55), with an internal radial wall (65) and being radially extensible, so that the internal radial wall (65) conforms to the electrical cable passing through the sealing barrel (5) via the sleeve (55). In order for the seal to be suitable for several sizes of cable while ensuring the seal even when the cable has pronounced irregularities, the internal radial wall (65) has radial ribs (66), towards the inside of the handle (55), to be in contact with the electric cable. Figure for the abstract: [FIG 2]

Description

Sealing barrel for an electric cable

The present invention relates to a sealing barrel, configured to be traversed by an electric cable, as well as an assembly comprising the sealing barrel and the electric cable, as well as finally an electrical device comprising the sealing barrel.

The invention relates to the field of electricity distribution, in particular to the field of sealing means for connecting an electric cable. The field considered relates in particular to electrical cables belonging to an overhead electrical distribution network. However, without limitation, the invention can be applied to cables for other types of networks, for example an underground electrical network, a domestic electrical network, a very low voltage electrical network or even a wired telecommunications network.

For an overhead electrical network intended to transport electricity at low voltage, that is to say between 100 and 1000 V (volts), it is possible to use an electrical cable whose diameter is between 10 and 30 mm, for example 16 mm. In general, this electric cable has on the outside a protective sheath, electrically insulating, smooth and of circular cross-section. This sheath generally encloses an electrically conductive core consisting of several twisted metal strands.

This cable is required to cross or be connected to electrical devices such as a branch, network or public lighting connector, a branch or network sleeve, an insulated lug, a terminal block or a connector, etc. In this case, the cable passes through a barrel, with which the electrical device concerned is fitted, to emerge inside the electrical device and be electrically connected there. It may be desired to ensure a seal between the barrel and the cable at the level of the barrel, to prevent the accidental introduction of bodies and liquids into the interior of the electrical device via the opening through which the cable passes. This is particularly indicated in the case where the electrical device is arranged outdoors, in particular for an overhead network electrical device. At the same time, for the electrical device to be versatile, the same shaft must be adapted to be traversed by cables of several sections, or having an irregular outer surface.

To ensure sealing, it is known to equip a shaft with two seals, arranged one behind the other to be successively crossed by the cable. The first seal is a lip seal whose opening is centered and the second seal is a lip seal whose opening is off-center and is of smaller diameter than that of the first seal. When the cable introduced into the barrel is of small diameter, the second seal provides sealing, in that its opening, of small diameter, matches the shape of the cable. The opening of the second seal being off-centre, the cable is held against an edge of the opening of the first seal, which ensures good placement of the small diameter cable. When the cable introduced into the barrel is of larger diameter, sealing is ensured by the first seal, the opening of which follows the shape of the cable while ensuring its correct placement.

However, some cables have a particularly irregularly shaped cross-section. In particular, to indicate whether it is a neutral or a phase cable, some cables have one or more longitudinal ribs forming between them a relatively deep longitudinal groove, for example of 0.5 mm (millimeters), on only one side of the cable. These reliefs being particularly pronounced, it is difficult to design a seal which both effectively seals the cable while being suitable for cables of several diameters.

It is to these drawbacks that the invention particularly intends to remedy by proposing a new sealing barrel which, while being adapted to be traversed by cables of different sizes, is capable of ensuring a seal even when the cable has a cross section with pronounced irregularities.

The subject of the invention is a sealing barrel, being configured to be traversed by an electric cable and comprising a ring and a seal, mounted in the ring, the seal being formed in one piece and comprising a sleeve, the sleeve having an internal radial wall centered on a sleeve axis and being radially extensible with respect to the sleeve axis, so that the internal radial wall conforms to the electric cable, when the electric cable passes through the barrel of sealing through the sleeve. According to the invention, the internal radial wall has radial ribs, which project radially towards the inside of the sleeve to be in contact with the electric cable when the electric cable passes through the sealing barrel, which are distributed along the sleeve axis and which each surround the sleeve axis while being centered on the sleeve axis.

An idea at the base of the invention is to provide that the sleeve is sufficiently extensible to adapt to different sizes of electric cable. When the electrical cable received has pronounced surface irregularities, such as longitudinal ribs, the radial ribs of the sleeve deform locally and at least some of the radial ribs take on the shape of these irregularities. Preferably, provision is made for the radial ribs of the sleeve, when they are not deformed, to have a radial height of value close to that of the longitudinal ribs or of the irregularities of the electrical cable. At the very least, the succession of several radial ribs greatly reduces the risk of introducing foreign bodies and moisture beyond the sealing barrel. The presence of the radial ribs advantageously avoids providing a thick sealing lobe around the cable, so that the sleeve can be designed to be particularly elastic and to adapt to a wide range of electrical cable sizes.

Preferably, each radial rib comprises: a front axial face, which is perpendicular to the handle axis; a rear axial face, which is parallel to the front axial face; and a crown radial face, which is parallel to the shaft axis and connects the front axial face to the rear axial face of the same radial rib.

Preferably, for each radial rib, the following are defined: a rib length, measured parallel to the handle axis, connecting the rear axial face to the front axial face and which measures between 0.2 and 0.7 mm; and a rib height, measured radially to the shaft axis, connecting the top radial face to a bottom radial face, formed by the internal radial wall between two successive radial ribs, the rib height measuring between 0.2 and 0.7mm.

Preferably, the radial ribs are regularly spaced from each other along the handle axis.

Preferably, at least three radial ribs are provided.

Preferably, the gasket further comprises: a belt, through which the gasket is mounted in the ring, the belt surrounding the sleeve; and a membrane, which connects the belt with the sleeve, so that the seal completely closes a radial space delimited radially between the sleeve and the belt, all around the sleeve axis.

Preferably, the membrane comprises: an intermediate part, which extends all around the sleeve axis, which is radially placed between the belt and the sleeve and projects axially from the belt and the sleeve; an outer part, which extends all around the sleeve axis and connects a front axial end of the belt to the intermediate part; and an internal part, which extends all around the shaft axis and connects a front axial end of the sleeve to the intermediate part, the internal part having a divergent shape, from the front axial end of the sleeve to in the middle part.

The invention also relates to an assembly, comprising the sealing barrel as defined above and the electric cable, the electric cable passing through the sealing barrel via the sleeve, the sleeve being radially extended by the electric cable, the internal radial wall conforming to the electric cable and the radial ribs being in contact with the electric cable.

Preferably, the electric cable comprises a longitudinal rib.

The invention also relates to an electrical device, comprising: the sealing barrel as defined above; a box, carrying the ring of the sealing barrel; and an electrical connection means, arranged inside the housing and being configured to be electrically connected to the electrical cable, while the electrical cable passes through the sealing barrel.

The invention and other advantages thereof will appear more clearly in the light of the following description of embodiments in accordance with the invention, this description being given solely by way of example and made with reference to the drawings below. -below.

There is a perspective view of an electrical device comprising a sealing barrel according to an embodiment in accordance with the invention.

There is a longitudinal section of the electrical device of the .

There is a longitudinal section of a seal belonging to the sealing barrel of Figures 1 and 2.

There is a view similar to that of the , where the seal is crossed by an electric cable.

There is a cross section of the cable of the .

The term "electrical device" encompasses any electrical device comprising a housing, containing an electrical connection means to which an electrical cable is designed to be electrically connected, as well as a sealing barrel through which the cable passes when the cable is electrically connected. by means of electrical connection. For example, in the case of an overhead electrical network, the electrical device may consist of a branch, network or public lighting connector, a branch or network sleeve, an insulated lug, a terminal block or a connector. electric.

A suitable cable 1 is shown in Figures 4 and 5. Cable 1 runs along a cable axis X1. Cable 1 is flexible so that axis X1 follows the curvature of cable 1 and is not necessarily straight. As seen on the , the cable 1 comprises an electrically conductive core 11, which extends along the axis X1 while being centered on the axis X1. The core 11 here consists of seven twisted metal strands. However, the core 11 could consist of a single conductive metal strand forming a mass, or of a number of metal strands different from seven, for example from eight to nineteen strands.

The cable 1 also comprises a sheath 12, which is electrically insulating and which surrounds the core 11, to protect it, all around the axis X11 and extends over most of the length of the cable 1. Externally, the sheath 12 has a cross section of generally circular shape, centered on the axis X1. In other words, the sheath 12 comprises a main wall 13 of circular cross section. This circular cross section has for example a diameter of between 10 and 30 mm. Preferably, the sheath 12 includes ribs 14, here three ribs 14, which extend over the entire length of the sheath 12 and which are radially in relief with respect to the main wall. The number of ribs 14 carried by cable 1 informs a technician of the function of this cable. For example, the fact that the cable has a rib 14 indicates that the cable is a cable for a first phase, whereas a cable with two ribs would be a cable for a second phase, a cable with three ribs would be a cable for a third phase, and that a cable without ribs, or with a multitude of ribs 14 regularly distributed over its entire circumference, would be a neutral cable.

For example, each rib 14 protrudes, relative to the wall 13, by a radial height R14 of approximately 0.5 mm. For example, each rib 14 measures about 1 mm wide, in a direction perpendicular to a ray coming from the axis X1. For example, two successive ribs 14 are spaced apart by approximately 0.5 mm around the axis X1.

Figures 1 and 2 show an example of an electrical device 2, which consists of an insulated terminal, which is used to electrically and mechanically connect the electrical cable 1 to a terminal of electrical equipment, not shown.

The device 2 mainly comprises a box 3, an electrical connection means 4 and a sealing barrel 5.

The box 3 is entirely made of electrically insulating material and encloses the connection means 4 to insulate it electrically and protect it from the outside, in a sealed manner. Housing 3 defines a main axis X3, axis X1 of cable 1 being designed to be coaxial, or at least parallel, to axis X3 when cable 1 is received in housing 3 by being connected to the connection means 4.

In the present example, along the axis X3, the housing 3 comprises a longitudinal end 31 and a longitudinal end 32 opposite.

The connection means 4 comprises a fixed contact 41 electrically conductive. The contact 41 is formed here by a terminal. The contact 41 comprises an internal part 43, contained in the casing 3 between the ends 31 and 32. The internal part 43 is designed to be brought into electrical contact with the core 11 of the cable 1 inside the casing 3. In For example, to form a terminal, the fixed contact 41 also comprises an electrical connection loop 42, formed in one piece with the internal part 43. The electrical connection loop 42 is arranged outside the casing 3 to be screwed to the terminal of the electrical equipment not shown, in order to electrically connect the cable 1 with this equipment. The contact 41 crosses the end 31, so that the internal part 43 is placed inside the box 3 between the ends 31 and 32 and the loop 42 is placed outside the box 3 beyond the end 31.

The sealing barrel 5 is formed at the end 32 of the casing 3. It is via the sealing barrel 5 that the cable 1 is introduced into the casing 3. Then, one end of the cable 1 is received inside the casing 3 so that the core 11 is in contact with the internal part 43. For this, the sheath 12 is stripped for the end received inside the casing 3. Alternatively, the sheath 12 is left, but it is expected that the internal part 43 has perforating elements, such as teeth, to perforate the sheath 12 and reach the core 11.

The connection means 4 advantageously comprises a means 44 for holding the cable 1 in contact with the fixed contact 41. In doing so, the cable 1 is secured to the device 2. Here, the means 44 is in the form of a screw fuse head, which passes through the housing 3, radially relative to the axis X3. Outside the box 3, the screw has a head 45 which is electrically insulating, to operate the screwing with a tool. In the example, it is a shear head, which breaks when sufficient torque is applied. Inside the box 3, the screw has a screw body 46, which, when the screw is tightened, pinches the cable between the internal part 43 and the body 46, to hold the cable 1 and ensure electrical contact. between the internal part 43 and the core 11 of the cable 1.

The sealing barrel 5 comprises a ring 51 and a seal 52. In the present example, the ring 51 forms the end 32 of the casing 3. When the cable 1 is connected to the means 4, the cable 1 crosses the ring 51. Ring 51, like the rest of housing 3, is made of a rigid and electrically insulating material. The ring is centered on the main axis X3.

Unlike the housing 3 and the ring 51, the seal 52 is made of an elastic material, for example an elastomer. For example, an elastic material with a hardness of 60 Shore A is chosen. The seal 52 is formed in one piece, that is to say is formed by a single piece in the same material, without assembly. The seal 52 is advantageously formed in a single molding operation in a single mold, by injecting elastomer into this mold.

Seal 52 is mounted in ring 51, which holds seal 52 in place. The function of seal 52 is to seal against dust and liquids between ring 51 and cable 1 which passes through said ring 51.

The seal 52 comprises a belt 53, a membrane 54 and a sleeve 55.

In the following, all considerations regarding the shape of gasket 52 relate to a situation where gasket 52 is at rest, undeformed, unless otherwise noted. The seal 52 being deformable, its shape changes during its use, in particular under the action of the ring 51 and under the action of the cable 1.

Belt 53 has a tubular shape centered on axis X3. The seal 52 is mounted in the ring 51 via the belt 53. For this, the belt 53 has an outer radial wall 56, which is in leaktight contact with a complementary inner radial wall 61 which belongs to the ring 51, as shown on the . Thus, ring 51 surrounds belt 53 around axis X3. Preferably, the outer radial wall 56 is provided with outer radial ribs 57, here seven outer radial ribs 57, which are distributed along the axis X3. The ribs 57 here have a triangular section, as seen in Figures 3 and 4. On the , the ribs 57 are shown undeformed. However, in reality, when the seal 52 is received in the ring 51, the ribs 57 are slightly crushed radially inwards to match the cylindrical shape with a circular base of the internal radial wall 61 of the ring 51. Thus, the ribs 57 provide the desired seal, while axially maintaining the seal 52 in place in the ring 51 by axial adhesion with the ring 51.

Along the axis X3, the belt 53 has a rear axial end 58 and a front axial end 59. Preferably, the end 58 is turned towards the inside of the housing 3, and the end 59 is turned towards the outside. of the housing 3. Here, the end 58 comes into axial abutment towards the rear against the means 4 to position the seal 52 axially. Alternatively, the end 58 could come into abutment against a part of the housing 3 or of the ring 51. In the opposite direction, the front end 59 preferably bears axially forwards against a curved edge 60 belonging to the ring 51, formed at the end 32. In the example, the edge 60 is curved towards the inside so as to wrap around the end 59 of the belt 53. In other words, the end 59 is radially captured between the curved edge 60 and the internal radial wall 61 of the ring 51. the belt 53, the edge 60 opposes a deformation of the belt 53 radially inwards.

Preferably, at its rear end 58, the belt 53 carries an internal flange 62, which projects radially inwards from the internal radial wall 61. The flange 62 advantageously extends all around the axis X3. The collar 62 aims to stiffen the belt 53, while ensuring guidance of the cable 1 in the direction of the means 4 during the insertion of the cable 1 through the barrel 5.

The sleeve 55 is tubular in shape, or slightly conical diverging towards the outside of the housing 3. The sleeve 55 is centered on an axis X55, called "sleeve axis". The axis X55 is here parallel to the axis X3 without being coincident. However, it could be provided that the axes X55 and X3 coincide. The 55 sleeve extends all around the X55 axis.

Sleeve 55 is radially expandable. Consequently, when the cable 1 crosses the joint 52, and therefore the shaft 5, the cable 1 crosses the sleeve 55 by extending it radially towards the outside, with respect to the axis X55, as shown on the . Thus extended, the sleeve 55 elastically matches the contours of the cable 1 to ensure sealing, by slightly tightening the cable 1 by elasticity. Axes X55 and X1 become coaxial.

When the seal 52 is not deformed, as shown in Figures 1 to 3, the sleeve 55 is surrounded by the belt 53, being radially spaced from the belt 53. Preferably, no part of the seal 52 is provided radially between the belt 53 and the sleeve 55 to allow the sleeve 55 to extend radially towards the belt 53 when the seal 52 receives the cable 1. The sleeve 55 has a rear axial end 63, facing the inside of the casing 3 and a forward axial end 64 facing outward. Preferably, along axis X3, ends 63 and 64 of sleeve 55 are arranged between ends 58 and 59 of belt 53.

Preferably, the rear axial end 63 of the sleeve 55 is left free, that is to say is not attached to any other element. The end 63 opens inside the housing 3. The front axial end 64 of the sleeve 55 is attached to the membrane 54, via which the sleeve 55 is attached to the belt 53.

Optionally, provision could be made for the rear axial end 63 to be closed off to prevent the accidental introduction of foreign bodies inside the casing 3 before the cable 1 is put in place. For the introduction of the cable 1, remove or perforate this filling.

Sleeve 55 has an inner radial wall 65. Wall 65 connects end 63 to end 64 and faces inward. When the cable 1 is received in the sleeve 55, the wall 65 comes into contact with the cable 1 by matching its shape to ensure sealing, by elasticity of the sleeve 55 then enclosing the cable 1. The internal radial wall 65 is centered on the X55 axis.

To improve sealing and, in particular, better match the shape of the longitudinal ribs 14 of the cable 1, the inner radial wall 65 has radial ribs 66, which project radially inwards from the sleeve 55 to be in contact with the cable 1 when cable 1 passes through barrel 5. Here, six ribs 66 are provided. However, a number of ribs 66 different from six can be provided. Preferably, at least three ribs 66 are provided to provide sealing.

Each rib 66 surrounds the axis X55, extending all around the axis X55 and being centered on this axis X55. Each rib 66 is continuous, that is to say uninterrupted around the axis X55. The ribs 66 are distributed along the axis X55, preferably being regularly spaced from each other. Preferably, the ribs 66 are regularly distributed from the end 63 to the end 64, so as to occupy the entire internal radial wall 65.

As shown more precisely on the , each radial rib 66 preferably has a square or rectangular radial section. More specifically, each rib 66 advantageously has a front axial face 67, a rear axial face 68 and a crown radial face 69. For each rib 66, the crown radial face 69 connects face 67 to face 68. Two ribs 66 successive are connected by a radial bottom face 70. Two successive ribs 66 delimit a groove, delimited by the face 70, the face 67 of one of the ribs 66 and the face 68 of the next rib 66. Here, five train paths are therefore planned. The axial faces 67 and 68 are all planar, or essentially planar, being parallel to each other and to a plane perpendicular to the axis X55. In other words, each face 67 and 68 forms a flat ring centered on the axis X55. The face 69 is of cylindrical shape with a circular base, centered on the axis X55. The face 70 is of cylindrical shape with a circular base, centered on the axis X55, of larger diameter than that of the face 69. In other words, the faces 69 and 70 are parallel to the axis X55.

As shown on the , a rib length L69 is defined, measured parallel to the axis X55, connecting the face 68 to the face 67. A rib height R66 is defined, which is a radial height, that is to say measured radially at the axis X55, connecting face 69 to face 70. An axial inter-rib distance L70 is defined, measured parallel to axis X55, connecting face 67 of one of the ribs 66 to rear axial face 68 of the rib 66 next. Preferably, the rib length L69, the axial distance L70 and the rib height R66 are of the same value. Preferably, they measure between 0.2 and 0.7 mm, for example 0.5 mm. Preferably, the height R66 of the ribs 66 is equal to or slightly greater than the height R14 of the ribs 14 of the cable 1. When the cable 1 is received in the sleeve 55, each rib 66 is locally flattened by each rib 14, but remains deployed between two successive ribs 14, so as to at least partially fill the gap between these two ribs 14. Sealing is thus ensured by the seal 52 even between these two ribs 14. Even if each rib 66 does not completely fill this interstice, the succession of ribs 66 forms an obstacle which greatly limits the introduction of water and foreign bodies into the interior of the casing 3.

The membrane 54 connects the belt 53 with the sleeve 55, so that the seal 52 completely closes off a radial space delimited radially between the sleeve 55 and the belt 53, all around the axis X55. In other words, in projection along the axis X55, the gasket 52 forms a single orifice, delimited by the sleeve 55 and centered on the axis X55, the membrane 54 filling the entire periphery of the sleeve 55 and the entire interior of the belt 53. When the cable 1 is introduced into the seal 52, the seal 52 provides a seal up to the outer radial wall 56.

The membrane 54 is in the form of a bellows, which serves to hold the sleeve 55 in the center of the belt 53, while allowing the elastic extension of the sleeve when the cable 1 is received there.

Preferably, the membrane 54 comprises an internal part 71, an intermediate part 72 and an external part 73. Each of these parts 71, 72 and 73 extends all around the axis X55. The internal part 71 connects the front axial end 64 of the sleeve 55 to the intermediate part 72. The external part 73 connects the front axial end 59 of the belt 53 to the intermediate part 72. Preferably, along the axis X55 , the end 59 is disposed between the intermediate part 72 and the end 58. In other words, the intermediate part projects axially from the belt 53 and the sleeve 55. Preferably, the edge 60 and the intermediate part 72 are the same axial height along the axis X55.

Radially relative to the axis X55, the intermediate part 72 is arranged between, externally, the belt 53 and, internally, the sleeve 55. From the end 64 to the intermediate part 72, the internal part 71 diverges, c ie widens radially. Preferably, the inner part 71 diverges in a hyperboloid or conical shape. This shape facilitates the introduction of the cable 1 through the sleeve 55. At the level of the end 64, the last rib 66 projects with respect to an internal wall of the internal part 71, whereas the internal wall is approximately at the same radial height as the radial bottom face 70 closest to the end 64. From the end 59 to the intermediate part 72, the outer part 73 converges, that is to say tightens radially . Along the axis X55, the internal part 71 is longer than the external part 73. The intermediate part 72 forms a rounded fold connecting the internal part 71 to the external part 73.

In Figures 2 and 3, the gasket 52 is shown to scale, in particular to reflect thicknesses and proportions.

During use, the belt 53 is provided to be non-extensible, or not very extensible, to ensure a stable and solid hold of the seal 52 in the ring 51, whereas the sleeve 55 and the membrane 54 are on the contrary provided to be elastically extensible to adapt to the shape of the cable 1 received through the sleeve 55. For this purpose, while the seal 52 is uniformly made of a single material, the sleeve 55 and the membrane 54 are thinner than the belt 53 and do not include any reinforcement, apart from the ribs 66. On the contrary, the belt 53 is thicker, for example three times thicker than the thickest part of the membrane 54. The belt 53 is preferably reinforced by the collar 62 to limit its deformation. The belt 53 is preferably prevented from deforming by rigid elements of the ring 51, here by the edge 60 retaining the end 59 of the belt 53. While the outer part 73 is of substantially constant thickness, for example equal to about a third of the thickness of the belt 53, the intermediate part 72 is advantageously a little thicker than the outer part 73, but still less thick than the belt 53, for example half as thick. From the intermediate part 72, the thickness of the internal part 71 decreases until reaching, at the end 64, the same thickness as the sleeve 55, excluding the ribs 66. The sleeve 55, excluding the ribs 66, is the thinnest part, to be particularly stretchy. For example, excluding the ribs, the sleeve 55 is five times thinner than the belt 53. For example, the radial thickness of the sleeve 55 is approximately 0.7 mm. Apart from the ribs 66, the sleeve 55 advantageously has no extra thickness or local reinforcement.

Any characteristic described for an embodiment or a variant above can be implemented in the other variants or embodiments described, as far as technically possible.

Claims (10)

Seal barrel (5), being configured to be traversed by an electric cable (1) and comprising a ring (51) and a seal (52), mounted in the ring (51), the seal (52) being integrally formed and including a sleeve (55), the sleeve (55) having an inner radial wall (65) centered on a sleeve axis (X55) and being radially expandable with respect to the axis sleeve (X55), so that the internal radial wall (65) hugs the electric cable (1), when the electric cable (1) passes through the sealing barrel (5) via the sleeve (55),
characterized in that the inner radial wall (65) has radial ribs (66), which protrude radially inward from the sleeve (55) to be in contact with the electric cable (1) when the electric cable (1 ) passes through the sealing barrel (5), which are distributed along the handle axis (X55) and which each surround the handle axis (X55) being centered on the handle axis (X55). Seal barrel (5) according to claim 1, in which each radial rib (66) comprises:

• a front axial face (67), which is perpendicular to the handle axis (X55);
• a rear axial face (68), which is parallel to the front axial face (67); And
• a crown radial face (69), which is parallel to the handle axis (X55) and connects the front axial face (67) to the rear axial face (68) of the same radial rib (66).

Sealing barrel (5) according to claim 2, in which, for each radial rib (66), one defines:

• a rib length (L69), measured parallel to the shaft axis (X55), connecting the rear axial face to the front axial face and which measures between 0.2 and 0.7 mm; And
• a rib height (R66), measured radially to the shaft axis (X55), connecting the top radial face (69) to a bottom radial face (70), formed by the internal radial wall (65) between two successive radial ribs (66), the rib height (R66) measuring between 0.2 and 0.7 mm.

Sealing barrel (5) according to any one of the preceding claims, in which the radial ribs (66) are regularly spaced from each other along the handle axis (X55). A barrel seal (5) according to any preceding claim, wherein at least three radial ribs (66) are provided. A barrel seal (5) according to any preceding claim, wherein the seal (52) further comprises:

• a belt (53), through which the seal (52) is mounted in the ring (51), the belt surrounding the sleeve (55); And
• a membrane (54), which connects the belt (53) with the sleeve (55), so that the seal (52) completely closes a radial space delimited radially between the sleeve (55) and the belt, all around of the handle pin (X55).

Seal barrel (5) according to claim 6, in which the membrane (54) comprises:

• an intermediate part (72), which extends all around the sleeve axis (X55), which is radially arranged between the belt (53) and the sleeve (55) and protrudes axially from the belt (53) and from the sleeve (55);
• an outer part (73), which extends all around the handle axis (X55) and connects a front axial end (59) of the belt (53) to the intermediate part (72); And
• an internal part (71), which extends all around the shaft axis (X55) and connects a front axial end (64) of the sleeve (55) to the intermediate part (72), the internal part (71 ) having a divergent shape, from the front axial end (64) of the sleeve (55) to the intermediate part (72).

Assembly comprising the sealing barrel (5) according to the preceding claims and the electric cable (1), the electric cable (1) passing through the sealing barrel (5) via the sleeve (55), the sleeve (55) being radially extended by the electric cable (1), the internal radial wall (65) marrying the electric cable (1) and the radial ribs (66) being in contact with the electric cable (1). Assembly according to Claim 8, in which the electric cable (1) comprises a longitudinal rib (14). Electrical device (2), comprising:

• the sealing barrel (5) according to any one of claims 1 to 7;
• a casing (3), carrying the ring (51) of the sealing barrel (5); And
• an electrical connection means (4), arranged inside the casing (3) and being configured to be electrically connected to the electrical cable (1), while the electrical cable (1) passes through the sealing barrel (5) .