Coupling for power cables with xlpe insulation and the method of installation of the coupling

 

(57) Abstract:

The invention relates to electrical engineering and allows smooth throws the strength of the electric field in the region of connection of the ends of the cables to reduce the complexity of the Assembly process while increasing the electric strength, durability and reliability. Coupling includes a conductive connector lived, insulator, two contact rings, the two contact springs ground node connection wire screen cable consists of two copper compression sleeves, tube cross-sealing and heat-shrinkable tube. The insulator is made of monoblock with a node in the alignment of the electric field strength in the form of two cones and the Central high-voltage electrode. 2 c. and 12 C.p. f-crystals, 1 Il.

The invention relates to electrical engineering, in particular to a cable coupling for connecting the ends of high-voltage cables and their installation, and can be used in industrial power.

Already known coupling for cables under the author's certificate of the USSR 1448371 published 30.12.88, containing a hollow body, a flexible sealing sleeve.

The disadvantages of known the local coupling in RF patent 2007809, published 15.02.94 containing the insulator chamber sealing for filling insulating molding mass.

The disadvantages of the known coupling is a low dielectric strength and reliability.

Already known method of mounting the coupling on the patent of the Russian Federation 2045799 published 10.10.95, consisting in cutting power cable, placing cleaned all lived in a sleeve and inserted into a sleeve pasty composition with a metal filler. The disadvantages of this method is the increased complexity of installation and low accuracy of the Assembly.

The closest known technical solution to the claimed coupling is the technical solution under the author's certificate of the USSR 1550591 published 15.03.90 containing conductive connector lived insulator.

The disadvantages of the known coupling is increased the intensity of the process of installation, low electric strength, short term service.

Closest to the claimed invention in terms of mounting the coupling is also the technical solution under the author's certificate of the USSR 1550591, namely, that the installation of joint IUF is tion of this method is the increased complexity of installation, insufficient to prevent damage to the conductive layers of the cable insulation during installation. The present invention is smoothing throws the strength of the electric field in the region of connection of cables, reducing the complexity of the Assembly process while increasing the electric strength, longer service life and reliability through the use of funds, providing corrosion resistance, preventing damage to the conductive layers and the insulation of the cable and reduce deformation of the cable insulation during installation, the extension of functionality due to the proposed size.

The invention in part of the device is achieved due to the fact that the coupling for power cables with XLPE insulation containing conductive connector lived, insulator, provided with two contact rings and springs ground connector wire screen cable consists of two copper compression sleeves, tube transversal sealing, made of foil, heat-shrinkable tube that is installed on the cable side of the connector wires of the cable screen, and the insulator is made with the node alignment nrlinii high-voltage electrode can be made of conductive silicone rubber.

The cones and the Central high-voltage electrode can be covered with a conductive composition.

The diameter of the hole of the insulator may be made within 38-80 mm

The insulator may be made of silicone rubber.

The coupling may be further provided with a casing made in the form of a hollow cylinder with openings on the cylindrical part and plugs. The cover may be made of solid polychlorinated.

The tube transverse seal can be placed at least one conductive layer and one layer of insulating tape and at least one additional heat-shrinkable tubing.

The problem in part of the method is due to the fact that the method of installation of the coupling, including the cutting and connection of current-carrying wires of the cables, the installation of the insulator and sealing couplings, before connecting the ends of the conductor wires of the cables are subjected to a straightening operation, heating and cooling to ambient temperature, then connect the wire screen cable by means of two compression sleeves and slip rings grounding shield junction lived and live wires of the screen cables, after osut transverse sealing coupling by forming aluminum foil tube and placing the latter on the insulator and the adjacent parts of the cable.

The connection wires of the cable can be carried out using mechanical obitaemoj connecting sleeve.

The connection wires of the cable may be carried out by a sleeve using a bolted connection.

The connection wires of the cable may be effected by welding.

Sealing can be accomplished by setting on the clutch cover with lid and fill the sealing composition into the cavity of the casing through one of the injection holes of the enclosure.

Sealing can be effected by the sequential placement on the clutch, at least one layer of self-adhesive conductive tape with overlap, a single layer of self-adhesive insulating tape and at least one additional heat-shrinkable tube.

The drawing shows a General view of the proposed design of the coupling.

Coupling for power cables with XLPE insulation contains one piece insulator 1 with the node alignment of the electric field strength in the form of two cones 2 and the Central high voltage electrode 3, the conductive connector lived, performed, for example, in the form of the compression connecting cable Inc is the first screen 7, designed as two holding parts, tube 8 transverse sealing, made of aluminum foil, heat-shrinkable tube 9 that is installed on the cable side of the connector wires of the cable screen, contact the grounding ring 10 with long wires, the contact ring 11 ground with short wires, two contact springs 12 earthing mesh screen tinned 13 made of copper, electrically conductive composition 14, crepe paper (not shown). Gooseneck insulator 1 may be made of silicone rubber with a diameter ranging from 38 to 80 mm Sealing couplings can be implemented with the casing 15 made in the form of a hollow cylinder with openings on the cylindrical part and covers, made in the form of continuous rings 16 and split ring 17.

Sealing can also be accomplished through consistent placement on the clutch, at least one layer of self-adhesive conductive tape with overlap, a single layer of self-adhesive insulating tape and at least one additional heat-shrinkable tube(not shown).

The mounting end of the coupling is as follows. Prior swagat cutting live wires of the cables to which the end a of the cable at a given distance off the shell. Impose a PREROLL PVC tape on the foil of the cable near the edge of the shell. Pull the contact spring 12 grounding to the PREROLL. The foil is cut into strips and put them on is installed on the cable, the contact spring 12. Pull on the contact spring 12 contact ring 10 with long wires. Turning in the direction of the cable copper wire screen cable and the contact ring 10 grounding. Pull on the end B of the cable stub in the form of a continuous ring 16. At the end B of the cable toward the cable end off the shell. On both ends of the cable perform an operation to straighten the ends of the cables, heating and cooling the ends of the cable to the ambient temperature. Produce cutting the ends a and b of the cable. Connect the wires of the cables by means of a connecting sleeve 4. Impose on the middle part pressovannoe sleeve 4 mesh screen tinned 13 made of copper. Next, close the connecting sleeve 4 aluminum screen 7, made in two parts and fix it. Move the isolator 1 onto the prepared end of the cable B. In the end position, the center of the insulator 1 must be located above the center of the connecting sleeve 4. Align the stepped transition between the body of the insulator 1 and the cable insulation is tapered historical fields impose a three layer conductive tape. On the cut ends of the cable and the insulator 1 impose at least one layer of creped paper. On top of creped paper from the contact ring 11 ground with short wires of the cable end B to the ring 10 grounding cable And put one layer of mesh tinned screen 13. Unbend a wire screen cable end B toward the center of the clutch and have evenly spaced around the circumference along the insulator 1 and the cable. In parallel with the wires of the screen have a wire contact ring 11 grounding. The ends of the wires are collected in two equal number of wires and their beam located diametrically opposite each other. Unbend a wire screen and the slip rings 10 grounding cable end And towards the center of the clutch; features wire evenly around the circumference of the cable, bringing their ends in two beam similarly to the wire end of the cable b Connect the bundles of wires of the screen using two copper compression sleeves 5 and 6 of connector wires of the screen. Form the tube 8 transverse sealing, wrapping the insulator 1 and the adjacent parts of the cable aluminum foil, reducing the bent edges of the foil together. Set the prepared tube on the cable. Fix the tail part of the foil tube 8 with electrical tape. Impose a tie wire on tube 8 in the zone of contact rings 10 and 11, providing electrical contact "screen - the ring". Probivaut turns of the bandage along the cable. Impose PVC tape on the surface of the tube 8 and the wire screen from cone 2 insulator (cable), grasping the end of the foil tube 8 to the cable sheath A. Move HERE 9 coated on its inner surface with glue to the area level of the body of the insulator 5 and using a gas burner thermoanarobium HERE 9. Podmahivat PVC tape on the calculated distance from the edge of the outer shell of the end of the cable b Connection cable conductors may be carried out by a sleeve using a bolted connection or by welding. Sealing can be accomplished by the installation of the clutch casing 15 with plugs in the form of a continuous ring 16 and the form of a split ring 17 and fills the sealing composition into the cavity of the casing 15 through one of the injection holes of the casing or by sequential placement of the tube 8 transverse sealing at least one layer of self-adhesive conductive tape with overlap, a single layer of self-adhesive insulating tape and at least the clutch.

Previously at one end of the cable (the end And pull the heat-shrinkable tube (in the future HERE) and the coupling shell (casing). Produce cutting live wires cable, which at the end a of the cable at a given distance off the shell. Impose a PREROLL PVC tape on the foil of the cable near the edge of the shell. Pull the contact spring grounding to the PREROLL. The foil is cut into strips and put them on is installed on the cable, the contact spring. Pull on the contact spring contact ring with long wires. Turning in the direction of the cable copper wire screen cable and the contact ring ground. Pull on the end B of the cable stub in the form of a continuous ring. At the end B of the cable toward the cable end off the shell. On both ends of the cable perform an operation to straighten the ends of the cables, heating and cooling to ambient temperature. Produce cutting the ends a and B of the cable. Pull the insulator on the prepared end And the cable, then pull the connecting sleeve up to her mid at mine end And the cable and presoviet, its beginning from the middle in accordance with the markings on the sleeve. Enter the core of the end B of the cable into soedinitelnaya of copper. Next, close the connecting sleeve aluminum screen, made in two parts, and fix it. Remove the insulator on the prepared end of the cable B. In the end position, the center of the isolator should be located above the center of the connecting sleeve. Align the stepped transition between the body of the insulator and the cable's insulation conical winding conductive tape. On the ends of each socket cones node alignment of the electric field strength lay three layers of conductive tape. On the cut ends of the cable and insulator impose respectively two and one layer of creped paper. On top of creped paper from the contact ring ground with short wires of cable B to the ring grounding cable And put one layer of mesh tinned screen. Unbend a wire screen cable end B toward the center of the clutch and have evenly spaced around the circumference along the insulator and cable. In parallel with the wires of the screen have a wire contact ring ground. The ends of the wires are collected in two equal number of wires and their beam located diametrically opposite each other. Unbend the wire ECCO the circumference of the cable, having collected their ends in two beam similarly to the wire ends of the cable B. Pull the copper sleeve up to her mid on wire screen cable B collected in one of the beams. Presoviet sleeve. Pull the free end of the sleeve on the wire contact ring grounding cable and similarly presoviet on their sleeve. Presoviet sleeve on diametrically oppositely located the bundle of wires as mentioned above. Pre-end mesh screen tinned weave into the ring wire cable grounding A. Sleeve connector wires of the screen is fixed with electrical tape, pinning them to the cable. Form a transverse seal coupling, wrapping the insulator and the adjacent parts of the cable aluminum foil, giving the foil shape of the tube, reducing the bent edges of the foil together. Set the prepared tube of aluminum foil in place of its provisions. Compresses on the insulator, the cones of the insulator and forth on the cable. Fix the tail part of the foil tube transverse germicidal coupling with electrical tape. Impose a tie wire on tube transverse sealing couplings in the zone of contact rings, providing electrical contact "screen - the ring". Prty and wire screen from cone insulator (cable A), grasping the end of the foil housing 4 of the coupling to the sheath of the cable A. Provide corrosion protection. Pulling THEN coated on its inner surface with glue to the area level of the body of the insulator and with the help of a gas burner thermoanarobium HERE. Podmahivat PVC tape on the calculated distance from the edge of the outer shell of the end of the cable B. Shift on her first slipped over the end of the cable stub in the form of a continuous ring. Set the PREROLL PVC tape the plug in the form of a split ring. In the cut plane pre-put silicone sealant. Pull the halves of the split ring with putty and PVC tape. Put silicone sealant around the circumference in the area of the joints of the rings and cable. Pull the cover on the ring. Holes for pouring resin should be on top of the casing. Install the cover onto the split ring and split ring seal their joints with sealant. Leave prepared for filling with sealing compound coupling to curing silicone sealant. After curing silicone sealant proceed to the preparation of sealant composition. Why pour the prepared portion of the sealing composition in palestiinale through the same hole. After filling the clutch to the output level of the sealing composition of the fill to end. To install the plugs.

1. Coupling for power cables with XLPE insulation containing conductive connector lived, and installed on the cable insulator with a hole, characterized in that it is equipped with two contact rings of the ground, pulled down on installed on the cable of the contact spring grounding connector wires of the cable screen, made in the form of two copper compression sleeves, tube transverse seal formed from aluminum foil and placed on the insulator and the adjacent parts of the cable, and heat-shrinkable tube that is installed on the cable side of the connector wires of the cable screen, moreover, the insulator is made of monoblock with a node in the alignment of the electric field strength in the form of two cones and the Central high-voltage electrode.

2. Coupling under item 1, characterized in that the cones and the Central high-voltage electrode node alignment is made of conductive silicone rubber.

3. Coupling under item 1, characterized in that the cones and the Central high-voltage electrode is characterized in that the diameter of the hole of the insulator is made within 38-80 mm

5. Coupling according to any one of paragraphs. 1-4, characterized in that the insulator is made of silicone rubber.

6. Coupling according to any one of paragraphs. 1-5, characterized in that it is provided with a casing made in the form of a hollow cylinder with openings on the cylindrical part and covers, filled sealant composition.

7. Coupling according to any one of paragraphs. 1-6, characterized in that the casing is made of solid polychlorinated.

8. Coupling according to any one of paragraphs. 1-5, characterized in that the tube transverse sealing posted at least one conductive layer and one layer of insulating tape and at least one additional heat-shrinkable tubing.

9. The method of Assembly of the coupling, including cutting of the ends of the cable and the connection of current-carrying wires of the cable, the installation of the insulator on the cable and sealing the coupling, characterized in that before connecting the cable ends are subjected to a straightening operation, heating and cooling the ends of the cable to the ambient temperature, connect the live cable conductor and shield junction of tokiwadai electric field in the form of two cones and the Central high-voltage electrode, wire screen cable ends connected by connector wires of the screen, made in the form of two compression sleeves, and slip rings grounding pull on installed on the cable of the contact spring grounding, formed from aluminum foil tube transverse seal, which is placed on the insulator and the adjacent parts of the cable.

10. The method according to p. 9, characterized in that the connection cable conductors carried out using mechanical obitaemoj connecting sleeve.

11. The method according to p. 9, characterized in that the connection wires of the cable carry case using a bolted connection.

12. The method according to p. 9, characterized in that the connection of the wires of the cable is carried out by welding.

13. The method according to any of paragraphs. 9-12, characterized in that the sealing coupling is carried out by setting on the clutch cover with lid and fill the sealing composition into the cavity of the casing through one of the injection holes of the enclosure.

14. The method according to any of paragraphs. 9-12, characterized in that the sealing coupling is carried out by sequential placement on the clutch, at least one layer of self-adhesive conductive tape with overlap, trubky.

 

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