Connecting block for electric cables

FIELD: electricity.

SUBSTANCE: connecting block (10) comprises connector (11) that passes around the longitudinal axis (X-X) and is equipped with at least at one end section (11a, 11b) with at least one enclosing and mounting support (12a, 12b) for at least one free end of the respective electric cable (100a, 100b). In position outward radial in regard to the connector a contractible barrel (20) is placed coaxially to it, and this barrel is supported in radial expanded state by at least one removable bearing element (30a, 30b) set in radial direction between the connector (11) and contractible barrel (20). The above connector (11) is coupled mechanically to removable bearing element (30a, 30b) by at least one locking member (70a, 70b) protruding radially from the connector (11) and removable bearing element (30a, 30b) and contacting the other connector (11) and removable bearing element (30a, 30b) thus preventing axial movement of the above connector (11) in regard to removable bearing element (30a, 30b).

EFFECT: guaranteed support of the connector axial position provided inside the contractible barrel at connection of the connecting block with electric cables.

14 cl, 9 dwg

 

AREA of TECHNOLOGY

The present invention relates to a joining point for electrical cables, in particular electrical cables for medium or high voltage.

PRIOR art

Throughout the text of this specification and the attached claims, the term "junction" is used to refer to either of the coupling, which is a connecting node, specially designed for mechanical and electrical connection of two electrical cables or terminations, which represents a connection Assembly, specially designed for mechanical and electrical connection of the electrical cable with another device, such as a power source, a transformer, a device user, etc.

The term "medium voltage" is used in this description to denote voltage, typically from about 1 kV to about 30 kV, and the term "high voltage" - to refer to voltages above 30 kV. The term "very high voltage" is used to determine the voltage higher than about 150 kV or 220 kV to 500 kV or more.

Known connecting nodes of different types for electric cables of medium or high voltage. In these connecting nodes are typically used shells, p�dorienne radial screed, for United of the end portions of the two electrical cables (in the case of the coupling) or the terminal segment of the electric cable connected to another device (in the case of terminations).

In document EP 0435569 described sleeve exposed screed containing dielectric material as an intermediate insulating layer, inner layer, managing the electric field, combined with partly covered inner conductive layer, and a conductive outer layer.

In the manufacture of cables or splices of cable terminations, known through the sleeve, the exposed radial screed, in General, provide for free space (usually referred to as the "standby position") on one side of the cable, and this free space has a length corresponding to the full length of the sleeve exposed to the screed.

After you establish a cable connection, the sleeve exposed to the screed, centruy over the field cable connections, and then perform shrinkage or by the application of heat or by removing external or internal reference element is provided to maintain the sleeve exposed to the screed, in a radially expanded condition.

Other known connecting nodes involve the use of plug connectors.

� document US 5316492 described plug connection, in particular, in the sleeve for high voltage cables with a coating of plastic. The plug connection contains electrical insulator, firmly planted on the ends of the cable. The connecting elements for the connection of cable cores contain one connector part and one second part, and means for mutual locking of the plug part and the mating part.

In document WO 2007/130811 described tubular ferrule to a cable comprising a first connector having opposite ends of the tip to connect the respective second and third mating connectors, each of which in turn is made with the possibility of connection with the corresponding cable to create an electrical contact between them. The tubular tip includes a sleeve, exposed to the screed. The area of the sleeve exposed to the coupler, mounted around the connector. The sleeve is exposed to a coupler that is held in a radially expanded position by two support elements, which are made with the possibility of removal, resulting in possible shrinkage of the sleeve exposed to the coupler, the first connector and to connect with him each end of a cable.

The applicant has observed that known connecting nodes have many disadvantages. In particular, the Applicant has noticed that, to achieve proper electrical and mechanical connection�tion between the connector provided inside the sleeve, exposed the plate, and the ends of the cable, it is necessary to pay great attention to the axial position of the first connector within the sleeve exposed to the screed, at the design stage of the liner exposed to the screed, and in the binding of the sleeve exposed to the screed, electrical cables. In particular, the desired axial position of the first connector, which is determined at the design stage of the liner exposed to the screed, should be supported upon binding of the sleeve exposed to the screed, electrical cables and until the end of the join operation.

For example, the Applicant noted that due to the bonding of the first connector according to the document WO 2007/130811 with pocket, exposed the plate, and due to the different electrical properties of the sleeve (which has the properties of elasticity), subject to the coupler, and the first connector may cause undesirable axial displacement of the first connector when the sleeve is exposed to the screed, is associated with electrical cables and, more particularly, when carry out the shrinkage of the sleeve exposed to the coupler, the first connector and each of the connecting ends of the cable.

The applicant faced the technical problem of developing such a connector for electrical cables, in particular for electric cables of medium and high n�voltage, which is suitable to guarantee maintaining the desired axial position of the connector provided inside the sleeve exposed to the screed, when linking the connecting node with electrical cables, in particular, when the plug connector is used.

The applicant found that this problem can be solved by a mechanical joint connector provided inside the sleeve exposed to the screed, with removable support members are provided to retain the sleeve exposed to the screed, in a radially expanded condition.

In particular, the applicant found that the above-mentioned technical problem can be solved by mechanical coupling of the connector with at least one removable support elements by at least one locking element that acts, at least one of the connector and the support member, and in contact with the other of the connector and the support member, preventing the mentioned axial movement of the connector relative to the mentioned at least one removable supporting element.

The applicant has noticed that due to the mechanical coupling of the connector with removable support element, the axial position of the connector is not changed due to the elastic behavior of the liner exposed to the screed when implementing this shrinkage of the sleeves on with�denial, so during the join operation it is possible to maintain the desired axial position.

A BRIEF SUMMARY of the INVENTION

Accordingly, the present invention relates to a joining point for electric cables containing:

connector, passing around its longitudinal axis and is provided at least at its one end portion, at least one enclosing a boarding place at least one free end of the corresponding electrical cable;

- the sleeve is exposed to a coupler that is located coaxially in a position radially external to the said connector,

over and above the liner that is exposed to a coupler that is held in a radially expanded state by at least one removable supporting element located in the radial direction between the said connector and the said sleeve exposed to the screed,

wherein said connector mechanically jointed with said at least one removable support element via at least one locking element which performs at least one of the said connector and the said at least one removable support element and in contact with the other of the connector and mentioned, minicamera, one removable supporting element.

Thus, the mentioned axial movement of the connector relative to the mentioned at least one removable support element is prevented.

Throughout the present description and following claims, the terms "radial", "axial" or "longitudinal" is used to denote the direction perpendicular and parallel directions, respectively, relative to the longitudinal axis of the origin of the connecting node, wherein the above-mentioned longitudinal axis defined by the longitudinal axis of the connector. Conversely, the expression "radially internal or external" is used to denote the position along the radial direction relative to the aforementioned longitudinal axis, and the expression "internal or external to the axial direction" is used to denote the position along the direction parallel to the aforementioned longitudinal axis and relative to the reference plane perpendicular to the longitudinal axis and intersecting the said connector at its Central area.

Connection Assembly according to the present invention may contain at least one of the following preferred features.

Mentioned at least one removable supporting element is preferably limited �ribbed body.

Preferably, the aforementioned tubular body has a plot in the shape of a truncated cone.

More preferably, the mentioned tubular body contains two paleobiology, having sections in the form of a truncated cone.

In a variant implementation of the connecting node mentioned tubular body further comprises a cylindrical end portion.

Mentioned connector can be mechanically jointed with the said plot in the form of a truncated cone or said cylindrical end section.

In a variant implementation of the mentioned at least one retaining element is integral with said at least one removable support element or the connector.

In an alternative embodiment of the connecting node, referred to, at least one locking element is designed as a part separate from the at least one removable support element or the connector.

Mentioned, at least one retaining element can be rigidly connected with said at least one removable support element or the connector, or may be pivotally mounted on the mentioned at least one removable support element or the above-mentioned connector, limiting the first working configuration, in which�mentioned Oh, at least one retaining element in contact with another of these, at least one removable support element or the connector, and a second working configuration, in which the mentioned at least one locking element is not in contact with the others mentioned, at least one removable support element or the connector.

In a preferred variant of its implementation, the connection Assembly comprises at least two retaining element.

Mentioned, at least two locking element is preferably located symmetrically with respect to the mentioned longitudinal axis.

In a preferred embodiment of the connector, the connector contains:

two opposite axial end section, and each of the two end sections are provided with suitable capacity of seats for the respective free end of the corresponding electrical cable, and

two opposite axially removable support member, and each of the two removable supporting elements is located radially between the corresponding one of the mentioned end portions and the said sleeve exposed to the screed.

The two removable supporting elements�that are located symmetrically with respect to the above-mentioned connector.

BRIEF description of the DRAWINGS

Further features and advantages of the connecting node will become more apparent from the following detailed description of some preferred variants of its implementation, and such description is provided merely as a non-restrictive example with reference to the accompanying drawings. In such drawings:

- Fig. 1 shows a schematic view, partly in section, of the connection node corresponding to the present invention, in a working configuration in which it mechanically and electrically connects the two electrical cable;

- Fig. 2 shows a schematic cross-section of the connection node corresponding to the present invention, in the first variant of its implementation;

- Fig. 3 shows in enlarged scale the cross section area of the connecting node according to Fig. 2;

- Fig. 4 is a schematic cross-section of the connection node corresponding to the present invention, in the second variant of implementation;

- Fig. 5 is a schematic sectional area of the connecting node, corresponding to the present invention, in another embodiment, its implementation;

- Fig. 6 is a schematic sectional area of the connecting node, corresponding to the present invention, in another Varian�e its implementation;

- Fig. 7 is a schematic sectional area of the connecting node, corresponding to the present invention, in another embodiment, the additional its implementation;

- Fig. 8A-8d are presented in an enlarged scale views of the details of the connection node corresponding to the present invention, in other embodiments of its implementation;

- Fig. 9a is a schematic cross-section of the connection node corresponding to the present invention, in further another embodiment, its implementation and in the first working configuration;

- Fig. 9b is a schematic cross-section of the connecting node according to Fig. 9 in the second working configuration.

DESCRIPTION of the PREFERRED EMBODIMENTS

With regard to Fig. 1, there is connection Assembly for electrical cables according to the present invention, indicated at 10. In particular, the coupling according to Fig. 1 represents the coupling shown in a working configuration in which it mechanically and electrically connects the two electrical cable 100a, 100b medium or high voltage.

Each electrical cable 100a, 100b includes at least one conductor 101a, 101b, and an insulating layer 102a, 102b, coaxially applied in a radially external position on the mentioned at least one conductor 101a, 101b. In radial�but the external position of the insulating layer 102a, 102b coaxially superimposed conductive screen 103a, 103b. The conductive screen 103a, 103b, in turn covered with at least one protective sheath 104a, 104b from electrotolima plastic or elastomeric material.

As shown in Fig. 1, each electrical cable 100a, 100b in a preferred embodiment further comprises at least one semiconductor shell 105a, 105b, located in the radial direction between the insulating layer 102a, 102b and the conductive screen 103a, 103b.

To uncover the cores 101a, 101b, the end portion of each cable 100a, 100b is treated in such a way that the cores 101a, 101b are in the axial direction by a predetermined distance relative to the outer layers, as clearly shown in Fig. 1.

As better shown in Fig. 2, the coupling 10 includes a connector 11, suitable for plug-in mounting and extending around the longitudinal axis X-X.

The connector 11 is a female connector that contains the opposite axial end portions 11a, l1b are each provided with seats 12a, 12b, made with the possibility of imprisonment in himself and locking a corresponding connector (not shown) associated with a corresponding electrical cable 100a, 100b, in the desired axial position.

The plug contains a footprint, made with who�agnosto receiving and retaining the terminal segment of the electrical cable 100, 100b through clamping, crimping, screws or welding.

After inserting each of the connectors associated with end portions of the electric cables 100, 100b, in a corresponding seat 12a, 12b, the plug is mechanically jointed with a connector 11 in the usual manner (e.g., as described US 5316492), thereby providing electrical connection between two electrical cables 100a, 100b.

The connector 11 is made of a metallic material, preferably aluminum, tin-plated. It contains two opposite in the axial direction of the outer surface 110a, 110b and radial tubular surface 111 having a cylindrical Central section and two opposite in the axial direction of the conical section.

In a position radially external to the connector 11, the coupling 10 includes a sleeve 20, is exposed to radial screed. The sleeve 20 may be made of dielectric materials exposed to hot or cold screed. These dielectric materials in General are known to those skilled in the art. The sleeve 20 is preferably made of a dielectric material exposed to the cold plate, such as rubber, which is ethylenepropylene monomer (EPDM).

The sleeve 20 is held coaxially to the longitudinal axis X-X and emaldona, which is greater than the length of the connector 11. The connector 11 is centered within the sleeve 20 along the longitudinal axis X-X, so the location of the sleeve 20 around the connector 11 is obtained symmetrical along the longitudinal axis X-X.

The sleeve 20 includes at its radially inner cylindrical section of the first insert 21 made of conductive or semiconductor material. Throughout the text the following description, the liner 21 will be referred to as "electrode".

The electrode 21 is preferably made of a semiconductor material, exposed to the cold floor. In a more preferred embodiment, such material is rubber, representing EPDM.

The electrode 21 is held coaxially to the longitudinal axis X-X and has a length that is longer than the length of the connector 11, and less than the length of the sleeve 20. The electrode 21 is located symmetrically with respect to the connector 11 and the sleeve 20 along the longitudinal axis X-X.

The sleeve 20 further comprises at each of its end portions 20a, 20b corresponding to the second cylindrical liner 22a, 22b, made of conductive or semiconductor material. Throughout the text the following description, the inserts 22a, 22b will be referred to as "baffles".

The deflectors 22a, 22b interact with the electrode 21, the driving electric field inside the sleeve 20, in particular, to avoid the presence�Vija areas with a high concentration of the electric field, in which can lead to undesirable electrical discharges and breakdowns.

The deflectors 22a, 22b are preferably made of a semiconductor material, exposed to the cold floor. In a more preferred embodiment, such material is rubber, representing EPDM. Alternatively, the deflectors 22a, 22b made of a material with high dielectric constants.

Each of the deflectors 22a, 22b is held coaxially to the longitudinal axis X-X and acts in the axial direction inside the sleeve 20 to the electrode 21, thus limiting the radially inner portion of the sleeve 20, passing from its Central portion to each of its end portions on the electrode 21, the dielectric material of the sleeve 20 and the baffle 22a, 22b.

Thus, in the connection Assembly according to Fig. 1 electrode 21 and the deflectors 22a, 22b are enclosed in a dielectric material of the sleeve 20.

In an alternative implementation (not shown), the electrode and the deflectors are not enclosed in a dielectric material of the sleeve 20, and are in a position radially internal to the radially inner surface of the sleeve 20.

As shown in Fig. 2, sleeve 20 together with the electrode 21 and the deflectors 22a, 22b is first retained in a radially expanded state, the two support elements 30a, 30b, which are in the radial direction�be made between the connector 11 and the sleeve 20 and are arranged symmetrically along the longitudinal axis X-X relative to the connector 11. In this configuration, the bearing elements 30A, 30b are connected with each other by a connecting element (not shown) which holds the bearing elements 30A, 30b within the sleeve 20.

Each support element 30A, 30b has a length that is longer than the length of the connector 11, so that when the bearing elements 30A, 30b are properly located within the sleeve 20 and are in contact with each other, the sum of the lengths of the two support elements 30A, 30b is greater than the length of the sleeve 20.

After reaching the mechanical and electrical connection of both electrical cables with the connector 11, the bearing elements 30a, 30b are removed in the axial direction from the opposite end portions 20A, 20b of the sleeve 20 along opposite directions (see arrows A1 and A2 in Fig. 2), thereby causing the mounting of the sleeve 20 together with the electrode 21 and the deflectors 22a, 22b of the connector 11 and each of the end portions of the cables connected to it. To remove the bearing elements 30a, 30b, the above-mentioned connecting element break.

As best shown in Fig. 3, each support element 30a, 30b comprises a rigid tubular body 31a, 31b made of plastic. Each rigid tubular body 31a, 31b is preferably made of a charged homopolymer polypropylene.

Each rigid tubular body 31a, 31b includes an external axial direction of the plot 32a, 32b in the shape of a truncated to�USA and internal in the axial direction of the cylindrical end portion 33a, 33b. Thus, the tubular body 31a, 31b are located inside the sleeve 20 so that the two inner in the axial direction of the cylindrical end section 33a, 33b facing each other.

Each tubular body 31a, 31b is preferably formed of two paleobiologic that are associated with each other when the tubular body 31a, 31b located inside the sleeve 20, and spaced from each other when the tubular body 31a, 31b is outside of the sleeve 20.

In an alternative implementation (not shown) of the connecting node according to the present invention, each support element is limited to a spirally wound strip, which is made with the possibility of removal from the respective end area of the liner, which could be achieved by pulling the free end portion of the strip.

Connection Assembly 10 according to Fig. 1 and 2 further comprises - in a position radially external to the sleeve 20, the first screen 40. The screen 40 has a length essentially equal to the length of the sleeve 20.

The screen 40 preferably consists of a two-layer shell comprising a radially inner layer and a radially outer layer.

Radially inner layer is preferably made of a dielectric material, preferably of rubber, which represents an EPDM. Radially outer layer is preferably made of a semiconductor material, a preferred�thainee - of rubber constituting EPDM.

In a position radially external to the first screen 40, there is provided a metal screen 50. The screen 50 has a length that is longer than the length of the sleeve 20, and is preferably made of tinned copper.

The coupling 10 further comprises - in a position radially external to the screen 50, the second screen 60, preferably having a length essentially equal to the length of the screen 50.

Screen 60 preferably consists of a two-layer shell, that is, it includes a radially inner layer, made of a dielectric material, and a radially outer layer made of a semiconductor material. It is preferable to use the same material as the screen 40.

As shown in Fig. 2 and 3, the connector 11 is mechanically articulated with each support element 30a, 30b through at least two pairs of locking elements 70a, 70b, which are symmetrically arranged on opposite axial sides relative to the connector 11.

In the following text, the present description will reference only one of the above mentioned supporting elements (in particular, the support element 30a) and on the corresponding securing elements (in particular, the locking elements 70a). However, the following description is similarly applicable to another of the above-mentioned�x support elements (support element 31b) and the corresponding locking elements (locking elements 70b), unless explicitly stated otherwise.

At least two locking element 70a are arranged equidistant from each other at a predetermined axial distance from the free end of the tubular member 31a.

Each of the locking elements 70a protrudes radially from the inner surface of the support element 30a in a direction essentially perpendicular to the longitudinal axis X-X. In particular, the upper elements 70a radially protrude from section 32A in the form of a truncated cone support member 30a to the longitudinal axis X-X.

The locking elements 70a abuts the external axial surface 110a of the connector 11, thus preventing any movement of the connector 11 along the outer axial end area of the support element 30a. Since the locking elements 70b similarly against the opposite outer axial surface 110b of the connector 11, thus preventing any movement of the connector 11 along the opposite outer axial end area of the support element 30b, it follows that the locking elements 70a and 70b prevent any axial movement of the connector 11 in both directions parallel to the longitudinal axis X-X.

Each of the locking elements 70a may be formed as a single unit with the supporting member 30a by means of molding, as shown in the enlarged f�agente according to Fig. 8a.

In an alternative embodiment, each of the locking elements 70a may be formed as a part separate from the support element 30a, as shown in the enlarged fragment of Fig. 8b. In this case, the locking element may be rigidly connected to the supporting member 30a by means of cold welding or welding with hot air or, alternatively, by mechanical or chemical coupling.

In an alternative embodiment, each of the locking elements 70a may be pivotally mounted on the support element 30a, limiting the first working configuration, in which the locking elements 70a are in the first position (Fig. 8c), so that they are in contact with the connector 11, thereby preventing any axial movement, and a second working configuration, in which the locking elements 70a are in the second position (Fig. 8d), so they are not in contact with the connector 11, thereby giving a support element 30a and the possibility of free movement relative to the connector 11.

Each retaining element 70a preferably has a round cross section and a rounded free end portion.

In alternative implementation, which is not shown, each pair of locking elements 70a, 70b are replaced by a single locking element protruding radially from the inner surface�resti support member 30a and extending in the circumferential direction around the longitudinal axis X-X.

Fig. 4 shows another embodiment of the connecting node 10 according to the present invention. In this drawing, the structural elements that are identical or functionally equivalent structural elements described above with respect to Fig. 1 to 3 are denoted by the same positions and additionally will not be described.

Variant of the implementation according to Fig. 4 differs from the embodiment according to Fig. 2 and 3 that the locking elements 70a is shorter than the locking elements of the embodiment according to Fig. 2 and 3, and the fact that they rest against the conical section radially outer surface 111 of the connector 11. Similar considerations apply to the locking elements 70b.

Fig. 5 shows the area of the connecting node 10, corresponding to the invention, in another embodiment, the additional its implementation. In this drawing, the structural elements that are identical or functionally equivalent structural elements described above with respect to Fig. 1 to 4 are denoted by the same positions and additionally will not be described.

Variant of the implementation according to Fig. 5 differs from the embodiment according to Fig. 2 and 3 that the stop elements 70a, 70b are enclosed in corresponding seats 112a, 112b, which are formed circumferentially on the conic section radially outer surface�ti 111 of the connector 11, and the fact that the stop elements 70a, 70b protrude from the cylindrical end portions 33a, 33b of the support elements 30a, 30b.

Fig. 6 shows the area of the connecting node 10, corresponding to the invention, in another embodiment, the additional its implementation. In this drawing, the structural elements that are identical or functionally equivalent structural elements described above with respect to Fig. 1 to 5 are denoted by the same positions and additionally will not be described.

Variant of the implementation according to Fig. 6 differs from the embodiment according to Fig. 5 that the bearing elements 30a, 30b, are not identical to each other, are not arranged symmetrically with respect to the connector 11.

In particular, the support element 30a includes an external axial end portion 32a in the form of a truncated cone and the inner in the axial direction of the cylindrical end portion 33a and the base element 30b contains only a portion 30b in the form of a truncated cone. The locking elements 70 are located on a cylindrical terminal section 33a of the support element 30a and the locking elements 70b are located on the interior in the axial direction end section of the section 32b in the form of a truncated cone support member 30b.

Fig. 7 shows the area of the connecting node 10, corresponding to the present invention, additional dragomiresti its implementation. In this drawing, the structural elements that are identical or functionally equivalent structural elements described above with respect to Fig. 1-6, are denoted by the same positions and additionally will not be described.

Variant of the implementation according to Fig. 7 differs from the embodiment according to Fig. 6 the fact that the locking elements 70a are located in the section 32A in the form of a truncated cone, and the fact that the stop elements 70a, 70b abut to the outer axial surfaces 110a, 110b of the connector 11, as in the variant of implementation according to Fig. 2 and 3.

Fig. 9a and 9b shows the area of the connecting node 10, corresponding to the present invention, in another embodiment, the additional its implementation. In these drawings, structural elements that are identical or functionally equivalent structural elements described above with respect to Fig. 1-6, are denoted by the same positions and additionally will not be described.

Variant of the implementation according to Fig. 9a and 9b differs from the embodiment according to Fig. 2 and 3 that the stop elements 70a, 70b is pivotally mounted, as shown in Fig. 8c and 8d, on the radially outer surface 111 of the connector 11 and is made with the possibility of imprisonment in County seats 300a, 300b formed in the radially inner surface of the support e�ments 30a, 30b, respectively.

In particular, as shown in Fig. 9a, when the bearing elements 30a, 30b are located in the frontal contact with each other (i.e., when the bearing elements 30a, 30b are located inside the sleeve 20, while holding the sleeve in a radially expanded state), the locking elements 70a, 70b are in the first working configuration in which they radially protrude from the radially outer surface 111 of the connector 11 (in particular, because of its cylindrical Central portion and in the axial direction abuts the corresponding stop surface 301a, 301b, formed the seats 300a, 300b, respectively, thereby defining a first working configuration in which the connector 11 can not make axial movement relative to the supporting elements 30a, 30b.

In contrast, as shown in Fig. 9b, when the bearing elements 30a, 30b allotted from each other for removal from the sleeve 20 (see arrows A1 and A2), the locking elements 70a, 70b are in the second working configuration, in which they lie on a radially outer surface 111 of the connector 11 and the outside seats 300a, 300b, thereby defining a second working configuration, in which the bearing elements 30a, 30b can move freely relative to the connector 11.

In all the above embodiments, the connector 11 is predominantly mechanically jointed with porn�mi elements 30a, 30b until the moment of extraction of the support elements 30a, 30b of the connecting node 10 to cause the plate of the sleeve 20 on the connector 11 and the end portions of the electric cables connected to it. Therefore, when the shrinkage of the sleeve 20 begins, the connector 11 is not applied no undesirable mechanical stress, because at that point of time yet there is no contact between the bushing 20 and the connector 11. Thus, the desired axial position of the connector 11 in the connecting node 10 is not changed under the action of the screed of the sleeve 20 at the beginning of the screed. Upon contact with the connector 11 during couplers, sleeve 20 is applied to the connector 11 of the radial force that locks the connector 11, locking it into position so that the desired axial position of the connector 11 is not changed until the end of the screed.

Similarly, the provision of locking elements 70a, 70b simplifies the positioning of the connector 11 in a desired axial position inside the connecting node 10 during Assembly of the connecting node 10. In fact, once the locking elements 70a, 70b are arranged on one of the connector 11 and the support elements 30a, 30b in a desired axial position on its free end, the connector 11 can be inserted axially in the support element 30a, 30b and move up until the stop elements 70a, 70b �e is in contact with thrust surface on the other element between the connector 11 and the tubular elements 30a, 30b.

Specialist in the art will understand that, based on the above-described different embodiments of the connecting node according to the present invention, can include a variety of additional other embodiments by combining the above signs in different ways. All these variants of implementation, in fact within the scope of the invention and are within the scope of protection limited by the appended claims of the invention.

Although the above description is given with reference to the connection node for connecting two electric cables, which is a clutch, this description is also applicable in the case of the connection node for connecting electrical cable with another device (e.g., such as the power source, the transformer, the user's device), which is a termination, in cases where such end fitting contains characteristics similar to the characteristics described and/or claimed here. Consequently, coupling, and termination within the scope of the invention and are within the scope of protection limited by the appended claims of the invention.

1. The connecting node (10) for electrical cables, comprising:
- a connector (11) passing around the longitudinal axis (X-X) and provided with a, m�Nisha least at its one end portion (11a, 11b), at least one accommodating seats (12A, 12b) at least one free end of the corresponding electrical cable (100A, 100b);
- sleeve (20), subject to a coupler that is located coaxially in a position radially external to the said connector (11),
moreover, the sleeve (20), subject to a coupler that is held in a radially expanded state by at least one removable support element (30A, 30b) located in the radial direction between the said connector (11) and the sleeve (20), subject to the screed,
wherein said connector (11) mechanically jointed with said at least one removable support element (30A, 30b) by means of at least one locking element (70A, 70b), which acts radially, of at least one of the mentioned connector (11) and the said at least one removable support element (30A, 30b) and in contact with the other of the connector (11) and the said at least one removable support element (30A, 30b).

2. The connecting node (10) according to claim 1, in which the mentioned at least one removable support element (30A, 30b) is limited by a tubular body (31A, 31b).

3. The connecting node (10) according to claim 2, in which mentioned trobc�toe body (31A, 31b) comprises a portion (32A, 32b) in the form of a truncated cone.

4. The connecting node (10) according to claim 3, in which the mentioned tubular body (31A, 31b) further comprises a cylindrical end portion (33a, 33b).

5. The connecting node (10) according to claim 3 in which the said connector (11) mechanically jointed with said portion (32A, 32b) in the form of a truncated cone.

6. The connecting node (10) according to claim 4, wherein the said connector (11) mechanically jointed with said cylindrical end portion (33a, 33b).

7. The connecting node (10) according to claim 1, in which the mentioned at least one retaining element (70A, 70b) is integral with said at least one removable support element (30A, 30b) or the connector (11).

8. The connecting node (10) according to claim 1, in which the mentioned at least one retaining element (70A, 70b) is made as a part separate from the at least one removable support element (30A, 30b) or the connector (11).

9. The connecting node (10) according to claim 8, in which the mentioned at least one retaining element (70A, 70b) is rigidly connected with said at least one removable support element (30A, 30b) or the connector (11).

10. The connecting node (10) according to claim 8, in which the mentioned at least one retaining element (70A, 70b) hinge set�len mentioned, at least one removable support element (30A, 30b) or the connector (11) so as to define a first working configuration, in which the mentioned at least one retaining element (70A, 70b) in contact with another of these, at least one removable support element (30A, 30b) and the connector (11) and a second working configuration, in which the mentioned at least one retaining element (70A, 70b) is not in contact with the others mentioned, at least one removable support element (30A, 30b) or the connector (11).

11. The connecting node (10) according to claim 1, comprising at least two retaining elements (70A, 70b).

12. The connecting node (10) according to claim 11, in which the mentioned at least two locking elements (70A, 70b) are located symmetrically with respect to the mentioned longitudinal axis (X-X).

13. The connecting node (10) according to claim 1, wherein the said connector (11) comprises:
two opposite axial end portion (11a, 11b), each of the two end portions (11a, 11b) are provided with suitable accommodating bore (12A, 12b) corresponding to the free end of the corresponding electrical cable (100A, 100b), and
two opposite axially removable support element (30A, 30b), each of the two con�governmental support elements (30A, 30b) is located in the radial direction between the corresponding one of the mentioned end portions (11a, 11b) and the sleeve (20), subject to the screed.

14. The connecting node (10) according to claim 13, in which the two removable support element (30A, 30b) are arranged symmetrically on the connector (11).



 

Same patents:

FIELD: chemistry.

SUBSTANCE: disclosed is a composition containing a polymer material, filler material dispersed in the polymer material, wherein the filler material contains inorganic particles and intermittently distributed conducting material, wherein at least a portion of the conducting material is in stable electrical contact with the inorganic particles, and the conducting material dispersed in the polymer material, wherein the composition has relative permittivity which varies nonlinearly as the applied voltage varies, and the inorganic particles are selected from a group comprising particles of BaTiO3, BaSrTiO3, CaCu3Ti4O12, SrTiO3 and mixtures thereof.

EFFECT: high nonlinearity and significant improvement of electrical properties of the material owing to higher breakdown strength.

18 cl, 9 dwg, 11 ex, 3 tbl

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to construction and installation of cables of optical links and is intended for use in optical socket structures. The cable input of an optical socket comprises a housing with an elongated portion stretched outwards, having an oval cross-section with a through-hole for entry of a loop of a bent cable into the socket. A ferrule is placed in the through-hole, said ferrule having channels for the cable of said loop, each channel, at least at one end of the through-hole, having a variable cross-section on the length. In the working position, the cable input together with cables in the channels of the ferrule is tightened at all sides by a sealing element which is closed around the perimeter and made of heat shrinkable material.

EFFECT: high quality of connecting cables and easier installation.

6 cl, 10 dwg

FIELD: electricity.

SUBSTANCE: sealing device is intended for design of cables intended for underground usage. The pressure-limiting device for cables may contain, for example, the first cable including a conductor and an oil-containing layer encapsulating the conductor and the second cable having a conductor. At the connection spot the first cable conductor may be connected to that of the second cable. The connection spot and the conductors of the first and the second cables may be covered with a pressure-limiting hose. Installed at multiple spots o the pressure-limiting hose may be multiple ties for crimping the pressure-limiting hose round the connection spots and the first and he second cables sections. The pressure-limiting device may be implemented in the form of a hose on a single-strand cable or in the form of a breakout with individual hoses on a multi-strand cable such as a three-strand cable.

EFFECT: oil-containing cables sealing improvement.

20 cl, 12 dwg

FIELD: electricity.

SUBSTANCE: product consists of protective core that has, at least, two end sections, many retaining cores and, at least, one cold shrink material that is kept in stretched condition above, at least, part of protective core and, at least, part of each retaining core. One end of each of retaining cores is mated with the corresponding end section of protective core. Retaining cores, protective core and cold shrink material as a whole annularly surround the equipment component so that cold shrink material when shrinking is set on part of equipment component after extracting the end of one of many retaining cores from the corresponding end section of protective core.

EFFECT: sealing or other kind of protection of equipment components such as cables or places of their connection.

15 cl, 31 dwg

Sealing device // 2401494

FIELD: electricity.

SUBSTANCE: concave body is suggested with open outer edge and several parts of perimetre adjacent with open body edge. Elastomeric film is attached to concave body perimetre parts along open concave body edge. Elastomeric film is suited for coupling one or more cables when the cables are located within the body to isolate them from environmental conditions.

EFFECT: invention improves device impermeability and provides possibility of reuse when cable or joint is restored.

10 cl, 5 dwg

FIELD: subsurface laying of screened communication cables designed for local communication networks to operate at high frequencies and as "last-mile" cables.

SUBSTANCE: proposed terminator for copper-conductor communication cables designed for use in structured cable systems of categories 5 and 5e (up to 100 MHz and higher) has sleeve-shaped plastic body with round bottom on one end and cylindrical opening on opposite end, spliced conductors of cable ends being spliced which are potted in sealing compound within cable terminator; spliced insulated copper conductors are sealed with aid of type UY-2 connectors accommodating water-repelling filler; spliced conductors are disposed inside reticular screen made in the form of reticular copper sleeve reliably electrically connected to screens of cable ends being spliced in structured cable networks by winding sub-screen tinned copper wires of cable on sleeve and potting core splice of cable screened with reticular copper sleeve in terminator by cold-hardened polyurethane sealing compound VILAD-13.

EFFECT: enlarged functional capabilities of terminator.

1 cl, 6 dwg

FIELD: cable connectors for power transfer between power supply and borehole instrument modules of downhole telemetering system in the course of boring.

SUBSTANCE: proposed electrical connector has one or more contact pairs insulated from one another and electrical conductors connected to internal and external opposing contacts of contact pairs. External contacts of contact pairs are made in the form of semi-rings which are installed opposite one another within flexible insert and are free to move toward one another under impact of external pressure. Proposed method for manufacturing this electrical connector includes connection of electrical conductors to contacts, of which external ones are made in the form of semi-rings, integral with auxiliary bushing and wrapped with band made of polymerizing or curing material, such as raw rubber, on top of auxiliary bushing. Wrapping procedure includes filling of cavities followed by placing conductors along blank axis and final wrapping until diameter of blank becomes greater than outer diameter of electrical connector. Blank is fitted between top and bottom cases of mold, compressed at the same time heating it, whereupon auxiliary bushing is completely removed by boring inner diameter of blank until semi-rings are fully separated.

EFFECT: enhanced power capacity, reliability, and service life of power supply.

5 cl, 6 dwg

FIELD: electrical connector and method for connecting coaxial cable lead to terminal.

SUBSTANCE: proposed connector has nut incorporating receiving port for connection to terminal. Nut also has circular clip. Connector also has base member one of whose ends is provided with projection to be inserted through clip hole. Other end of base member incorporates part of inner surface. Connector also has support with flange and body. Support is free to move for compressing external cable conductor and shell with support body and part of inner surface to obtain distal compression. Tightening nut with terminal compresses projection between support flange and circular clip to obtain proximal tightness.

EFFECT: enhanced tightness, reduced manufacturing and maintenance charges.

10 cl, 11 dwg

FIELD: electrical engineering.

SUBSTANCE: proposed water-and-gas-tight stuffing box designed for terminating ends of communication cable line, including plastic-sheathed telephone cables with polyethylene insulated conductors, in capacity of 100 to 600 pairs directly in switchgear cabinet on vertically mounted cables which can be or not held at gage pressure and with water-repelling material filled core has shield connector secured on aluminized polyethylene cable sheath in contact with conical surface of through hole at input end of body; plastic cable sheath is filled within stuffing box with cold-cured polyurethane sealing compound; each conductor is covered with plastic insulating layer throughout its entire length.

EFFECT: simplified design, enhanced reliability of cable box.

1 cl, 7 dwg

FIELD: devices for formation of electrical connections in vehicles; the repair kit is designated for repair of a failed electrical device of a vehicle connected to the vehicle electrical equipment system by several wires.

SUBSTANCE: the repair kit has a new electrical device installed instead of the failed one, several wires connected to the new electrical device and a built-up protective box designated for protection of the electrical connection made by joining of the wires of the new electrical device and the wires of the vehicle electrical equipment system. The built-up protective box has a body with several holes insulated from one another. The packing rings positioned in each hole of the body intended for arrangement of the new electrical device section of the connected respective wire of the vehicle electrical equipment system and the respective new electrical device form in fact a waterproof packing around the section of the wires connected to one another by joining. The protective built-up box has also a cover joined to the body. The claimed repair kit is preferably designated for replacement of the sensor of the content of oxygen in exhausted gases failed on the vehicle.

EFFECT: simplified aftersale servicing of the vehicle.

9 cl, 8 dwg

FIELD: electricity.

SUBSTANCE: invention relates to an insulator for a tight shell of a connector of end termination of an electric cable, which provides for electric connection between end termination of the cable (132, 134) and a domestic contact terminal. In accordance with the invention the insulator (100) comprises the first installation channel (102) to hold the domestic contact terminal (208) and the second assembly channel (104) to partially hold the cable (132, 134), besides, the second installation channel (104) has a contact area (112), in which in the mounted condition there is a cable tip located subject to electric contact impact, and a sealing area (114), which may become a support as capable of sealing of the end termination of the cable, and in which the central axis (118) of the sealing area (114) is located as shifted relative to the central axis (116) of the connection area (112).

EFFECT: higher tightness between a channel and a cable in a wide range of diameters of used cables.

18 cl, 23 dwg

FIELD: electricity.

SUBSTANCE: system (1) of two or several insulating components for manufacturing of medium voltage cable fittings with automatically fixed electrically insulating lock, for instance for installation of cable connections in it, includes at least the first insulating component (2) with linear roll-like gripped element (3) arranged in its coupling surface (4) at the end side, which enters, as in lock with latch, into according gripping element (6) that matches it in shape at the end side of coupling surface (4) in the second insulating component (5). At least one insulating component (2 or 5) surrounds active current-conducting connection elements, and linear closed roll-shaped gripped element (3), forming lock, and also gripping element (6) that matches it in shape in both connected insulating components (2, 5), by shape of their cross section are arranged as concave-convex rounded coupling wit area (7) of head in gripped element (3) and area (7) of hole in gripping element (6) and with area of journal (8), separated from neighbouring areas by points of curvature bend, in each element, and also with area (9) of collar that borders area (8) of journal, in each element.

EFFECT: invention provides for creation of easily mounted system that prevents electric breakdown.

20 cl, 8 dwg

The invention relates to a device for enclosing parts of the elongated objects, for example, electrical wire conductors, and to a material for sealing, preferably gel, protect these items from violations

The invention relates to a new and better from a technological point of view, the compositions of the gels containing the block copolymer is a styrene- (ethylene/propylene)-styrene (SEPS) and at least 300 mass parts, preferably at least 400 mass parts, more preferably at least 500 mass parts) fluid-filler per 100 mass parts of the block copolymer and the liquid extends and softens the polymer blocks ethylene/propylene specified copolymer

FIELD: electricity.

SUBSTANCE: system (1) of two or several insulating components for manufacturing of medium voltage cable fittings with automatically fixed electrically insulating lock, for instance for installation of cable connections in it, includes at least the first insulating component (2) with linear roll-like gripped element (3) arranged in its coupling surface (4) at the end side, which enters, as in lock with latch, into according gripping element (6) that matches it in shape at the end side of coupling surface (4) in the second insulating component (5). At least one insulating component (2 or 5) surrounds active current-conducting connection elements, and linear closed roll-shaped gripped element (3), forming lock, and also gripping element (6) that matches it in shape in both connected insulating components (2, 5), by shape of their cross section are arranged as concave-convex rounded coupling wit area (7) of head in gripped element (3) and area (7) of hole in gripping element (6) and with area of journal (8), separated from neighbouring areas by points of curvature bend, in each element, and also with area (9) of collar that borders area (8) of journal, in each element.

EFFECT: invention provides for creation of easily mounted system that prevents electric breakdown.

20 cl, 8 dwg

FIELD: electricity.

SUBSTANCE: invention relates to an insulator for a tight shell of a connector of end termination of an electric cable, which provides for electric connection between end termination of the cable (132, 134) and a domestic contact terminal. In accordance with the invention the insulator (100) comprises the first installation channel (102) to hold the domestic contact terminal (208) and the second assembly channel (104) to partially hold the cable (132, 134), besides, the second installation channel (104) has a contact area (112), in which in the mounted condition there is a cable tip located subject to electric contact impact, and a sealing area (114), which may become a support as capable of sealing of the end termination of the cable, and in which the central axis (118) of the sealing area (114) is located as shifted relative to the central axis (116) of the connection area (112).

EFFECT: higher tightness between a channel and a cable in a wide range of diameters of used cables.

18 cl, 23 dwg

FIELD: electricity.

SUBSTANCE: connecting block (10) comprises connector (11) that passes around the longitudinal axis (X-X) and is equipped with at least at one end section (11a, 11b) with at least one enclosing and mounting support (12a, 12b) for at least one free end of the respective electric cable (100a, 100b). In position outward radial in regard to the connector a contractible barrel (20) is placed coaxially to it, and this barrel is supported in radial expanded state by at least one removable bearing element (30a, 30b) set in radial direction between the connector (11) and contractible barrel (20). The above connector (11) is coupled mechanically to removable bearing element (30a, 30b) by at least one locking member (70a, 70b) protruding radially from the connector (11) and removable bearing element (30a, 30b) and contacting the other connector (11) and removable bearing element (30a, 30b) thus preventing axial movement of the above connector (11) in regard to removable bearing element (30a, 30b).

EFFECT: guaranteed support of the connector axial position provided inside the contractible barrel at connection of the connecting block with electric cables.

14 cl, 9 dwg

FIELD: electricity.

SUBSTANCE: junction terminal (1) comprises connecting area (2) for the terminal connected to mating terminal; connecting area (10) for wire to be connected to the wire (W); neck area (20) coupling connecting area (2) and connecting area (10); and resinous covering area (30), which covers connection of the area (10) and wire (W) moulded by injection moulding of resin using die moulds. The neck area (20) includes the lower wall (21) and a pair of side walls (22) installed vertically at both sides of the lower wall (21) and having equidistant parallel areas (22a) of the walls.

EFFECT: development of junction terminal that allows easy installation and control of a part intended for resin locking.

8 cl, 14 dwg

FIELD: electricity.

SUBSTANCE: compression terminal comprises interconnected first element (11) including area (11A) of the electric connection and the second element (12) including area (12A, 12B) of electric wire connection. The first (11) and second (12) elements are made of heterogeneous metals, for example, copper and aluminium. Interconnected sections (16) of the first element (11) and second element (12) are covered by section (20) of seal. At that lower surface of seal section is placed at the same level as lower surface of the terminal or above the specified level.

EFFECT: preventing electric corrosion at connection of the first and second elements of the terminal.

3 cl, 5 dwg

FIELD: repairs of communication line cables laid in soils of all kinds in cable conduits, manifolds, and tunnels.

SUBSTANCE: proposed method includes installation of split lead bushing on aluminum sheath of each cable followed by shifting both bushings along cables away from spliced joint of cable conductors, running exposed sections of aluminum sheath over with tin, fitting bushings back in place, and soldering them to tinned sections of aluminum sheath; at the same time longitudinal seam on bushings is soldered, ends of bushings are sealed by thermosetting tape, junction box is installed above spliced joint, and its butt-ends are soldered to bushings. In order to repair outer shielding hose, junction box and adjacent cable sections are covered with sealing compound and moist-cured bandage.

EFFECT: improved repair quality, enhanced service life of junction box due to elimination of electrochemical corrosion.

3 cl, 1 dwg

Cable sealing // 2256992

FIELD: flexible coatings and method for cable splice sealing.

SUBSTANCE: flexible coating for sealing cable splice without external heating has gel layer and supporting layer; its flexibility is sufficient to enable manually making gathers around cable-to-splice transition sections of smaller size in case there is gel at this transition for packing resulting seal. Supporting layer preferably made of low-density polyethylene ensures mechanical strength and facilitates coating procedure. Evaporation preventing layer preferably made of aluminum may be applied to supporting layer. Protective layer may be applied to evaporation preventing layer. Adhesion reducing material may be used at least on one end of gel layer facing supporting layer to provide for regulating coating placed on cable splicing sections. Flexible or rubber band may be wound on applied coating for gel compression.

EFFECT: provision for reusing seal obtained; enhanced sealing length.

38 cl, 19 dwg

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