CN209929940U - High-voltage crosslinked polyethylene insulated cable molding type insulated joint - Google Patents
High-voltage crosslinked polyethylene insulated cable molding type insulated joint Download PDFInfo
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- CN209929940U CN209929940U CN201920924709.9U CN201920924709U CN209929940U CN 209929940 U CN209929940 U CN 209929940U CN 201920924709 U CN201920924709 U CN 201920924709U CN 209929940 U CN209929940 U CN 209929940U
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- joint
- plastic
- copper shell
- coated copper
- insulating
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- 229920003020 cross-linked polyethylene Polymers 0.000 title claims abstract description 23
- 239000004703 cross-linked polyethylene Substances 0.000 title claims abstract description 23
- 238000000465 moulding Methods 0.000 title claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 90
- 229910052802 copper Inorganic materials 0.000 claims abstract description 86
- 239000010949 copper Substances 0.000 claims abstract description 86
- 229920003023 plastic Polymers 0.000 claims abstract description 54
- 239000004033 plastic Substances 0.000 claims abstract description 54
- 239000004020 conductor Substances 0.000 claims abstract description 27
- 239000004677 Nylon Substances 0.000 claims abstract description 14
- 229920001778 nylon Polymers 0.000 claims abstract description 14
- 239000002390 adhesive tape Substances 0.000 claims abstract description 13
- 238000009413 insulation Methods 0.000 claims description 59
- 238000007789 sealing Methods 0.000 claims description 15
- 238000010276 construction Methods 0.000 abstract description 4
- 230000035882 stress Effects 0.000 description 11
- 230000005684 electric field Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 230000037303 wrinkles Effects 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003878 thermal aging Methods 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
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Abstract
The utility model discloses a high pressure crosslinked polyethylene insulated cable mould formula insulated joint, include: the nylon belt is wrapped on the outer sides of the two cable conductors which are mutually butted in a half-lapping way; a terminal insulating body layer comprised of a first terminal insulating body segment and a second terminal insulating body segment; the joint insulating and shielding layer consists of a first joint insulating and shielding section and a second joint insulating and shielding section; the first waterproof insulating self-adhesive tape is wrapped on the outer side of the joint main body in a semi-overlapping mode; and the insulating copper shell consists of a first plastic-coated copper shell and a second plastic-coated copper shell. In this way, the utility model relates to a high pressure crosslinked polyethylene insulated cable mould formula insulated joint, this insulated joint structure is compact, and occupation space is little, can satisfy arranging in narrow and small worker's well, reduces the capital construction cost.
Description
Technical Field
The utility model belongs to a cable intermediate head, concretely relates to high pressure crosslinked polyethylene insulated cable molding type insulated joint.
Background
High-voltage cables of 66kV and above are mostly single-core cable systems, the metal sheath has induction voltage and is enlarged along with the increase of the length of the cable, the superposition can endanger personal safety, especially when a short-circuit fault, lightning impulse or operation overvoltage occurs to a circuit, the outer sheath can be punctured, in addition, if the two ends of the cable shield are directly grounded, a large circulating current loss can be generated, the cable can generate heat, the current-carrying capacity is reduced, the thermal aging of the cable is accelerated, therefore, when the single-core high-voltage cable circuit is long, an insulating joint (the metal sheath of the cables at the two ends of the joint and the cable insulating shield are electrically disconnected) is required to be arranged to be matched with a cross interconnection box for transposition connection, the grounding mode of cross interconnection is realized, the induction voltage of the metal sheath is reduced, the damage caused by the induction overvoltage is effectively avoided when the short-circuit, and the safe and stable operation of the line is ensured.
The high-voltage cable accessories commonly used in China at present are integral prefabricated connectors, but the prefabricated connectors are assembly bodies made of different materials, space charges are easy to accumulate at interfaces of the different materials, local field intensity distortion is caused, even electric branches are caused to break down, on the other hand, due to the influence of operation temperature, the thermal expansion and cold contraction performance of the different materials are different, movable interfaces can be caused at the interfaces of the materials, the joints are easy to be invaded by moisture to accelerate cracking, moreover, the rubber insulating part is influenced by an electric field and a thermal field in the long-term operation process, the interface pressure is reduced due to the reduction of the elastic modulus, and additives of the rubber insulating part are separated out, so that the insulating performance is reduced, and potential safety hazards exist, in addition, the integral prefabricated connectors are required to be fixed after being manufactured, operations such as moving, transferring and the like cannot be carried out, otherwise, the internal components can slide or misplac, the potential safety hazard exists, from the perspective of engineering budget, the size of the integral prefabricated connector is too large, a widening section is specially arranged in a cable trench or a cable tunnel to be used for arranging the connector, and the capital construction cost of a cable line is greatly increased.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a high pressure crosslinked polyethylene insulated cable molding type insulated joint, can improve the reliability and the life of product operation.
In order to solve the technical problem, the utility model discloses a technical scheme be: a molded insulated joint for a high voltage cross-linked polyethylene insulated cable comprising:
the cable comprises a nylon belt, a cable conductor and a cable conductor, wherein the nylon belt is wrapped on the outer sides of two cable conductors which are mutually butted in a half-lapping way, and a joint conductor shielding layer is wrapped outside the nylon belt;
a splice insulation body layer comprised of a first splice insulation body segment and a second splice insulation body segment, the first splice insulation body segment wrapped around the exterior of the splice conductor shield layer;
the joint insulation shielding layer consists of a first joint insulation shielding section and a second joint insulation shielding section, an extension section is arranged on the first joint insulation shielding section and is positioned at the inner side of the second joint insulation shielding section, a second joint insulation main body section is positioned between the extension section and the second joint insulation shielding section, a semi-conductive buffer water-blocking tape is semi-lapped at the outer sides of the first joint insulation shielding section and the second joint insulation shielding section, a thin lead belt is semi-lapped at the outer side of the semi-conductive buffer water-blocking tape and is overlapped with corrugated lead sheaths at two sides of the cable conductor, a space is formed between the first joint insulation shielding section and the second joint insulation shielding section, and a nonlinear stress control tape is semi-lapped and wrapped at the outer side of the space;
the first waterproof insulating self-adhesive tape is wrapped on the outer side of the joint main body in a semi-overlapping mode;
the insulating copper shell consists of a first plastic-coated copper shell and a second plastic-coated copper shell, wherein the first plastic-coated copper shell and the second plastic-coated copper shell are both provided with grounding wire copper pipes, the first plastic-coated copper shell and the second plastic-coated copper shell are respectively arranged at two sides of the joint main body, an insulating ring is arranged between the first plastic-coated copper shell and the second plastic-coated copper shell, a sealing ring is arranged between the first plastic-coated copper shell and the second plastic-coated copper shell and in a contact surface of the insulating ring, and the first plastic-coated copper shell and the second plastic-coated copper shell are connected with the corrugated lead sheaths at two ends;
and the sealing rubber strip is tightly wrapped on two sides of the insulating ring and is connected with the surfaces of the first plastic-coated copper shell and the second plastic-coated copper shell, a second waterproof insulating self-adhesive tape is tightly wrapped on the insulating ring and the sealing rubber strip, and a second heat-shrinkable sleeve is installed on the outer side of the second waterproof insulating self-adhesive tape.
In a preferred embodiment of the present invention, the first terminal insulation main body section is engaged with the first terminal insulation shielding section.
In a preferred embodiment of the present invention, the joint conductor shield layer and the conductor shield of the cable body are cross-linked to each other to be integrated.
In a preferred embodiment of the present invention, the nonlinear stress control band overlaps with the semiconductive buffer water-blocking bands on both sides.
In a preferred embodiment of the present invention, the thin lead belt and the corrugated lead sheath are fastened by a fine copper wire.
In a preferred embodiment of the present invention, the extension section is parallel to the second joint insulation shielding section.
In a preferred embodiment of the present invention, the first plastic-coated copper shell and the second plastic-coated copper shell are fastened to the insulating ring by screws.
In a preferred embodiment of the present invention, the direction of the pipe orifice of the ground wire copper pipe on the first plastic-coated copper shell and the second plastic-coated copper shell is the same.
In a preferred embodiment of the present invention, the first plastic-coated copper shell and the second plastic-coated copper shell are connected to the corrugated lead sheath at both ends through lead sealing.
In a preferred embodiment of the present invention, a first heat shrinkable tube is installed outside the lead seal.
The utility model has the advantages that: the utility model relates to a high pressure crosslinked polyethylene insulated cable mould formula insulated joint, this insulated joint compact structure, the size is little, and occupation space is little, can satisfy arranging in narrow and small worker's well, reduces the capital construction cost.
Drawings
Fig. 1 is a schematic structural diagram of a molded insulation joint of a high-voltage cross-linked polyethylene insulated cable.
Fig. 2 is a partially enlarged view of a molded insulated joint a of a high voltage cross-linked polyethylene insulated cable.
Fig. 3 is a partially enlarged view of a molded insulated joint B of a high voltage cross-linked polyethylene insulated cable.
The parts in the drawings are numbered as follows: 1. a corrugated lead sheath; 2. a nylon band; 3. a joint conductor shield layer; 4. a first terminal insulating body segment; 5. a second terminal insulating body segment; 6. a first terminal insulation shield segment; 7. a second terminal insulation shield segment; 8. an extension section; 9. a semiconductive buffer water-blocking tape; 10. a thin lead belt; 11. a nonlinear stress control band; 12. a first waterproof, insulating, self-adhesive tape; 13. a first plastic-coated copper shell; 14. a second plastic-coated copper shell; 15. a copper pipe of a grounding wire; 16. an insulating ring; 17. a seal ring; 18. lead sealing; 19. a first heat shrink sleeve; 20. a second waterproof insulating self-adhesive tape; 21. a second heat shrink sleeve; 22. and sealing rubber strips.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Referring to fig. 1 to 3, an embodiment of the present invention includes: a molded insulated joint for a high voltage cross-linked polyethylene insulated cable comprising:
the cable comprises a nylon belt 2, wherein the nylon belt 2 is wrapped on the outer sides of two cable conductors which are in butt joint with each other in a half-lapping mode, a joint conductor shielding layer 3 is wrapped outside the nylon belt 2, the joint conductor shielding layer 3 and the conductor shielding of a cable body are combined into a whole in a cross-linking mode, the nylon belt 2 is the semi-conductive nylon belt 2, and the joint conductor shielding layer 3 is prevented from being embedded into the conductors in the manufacturing process of the nylon belt 2.
The joint conductor shield layer 3 functions to shield and homogenize the electric field.
A terminal insulation body layer consisting of a first terminal insulation body segment 4 and a second terminal insulation body segment 5, said first terminal insulation body segment 4 being wrapped around said terminal conductor shield 3;
and the joint insulating shielding layer consists of a first joint insulating shielding section 6 and a second joint insulating shielding section 7, and the first joint insulating main body section 4 is matched with the first joint insulating shielding section 6.
The joint insulation main body layer and the joint insulation shielding layer are used for meeting the insulation electrical performance of the joint.
Since the terminal insulation shield layer cannot be continuous in the manufacturing process, the first terminal insulation main body segment 4, the second terminal insulation main body segment 5, the first terminal insulation shield segment 6, and the second terminal insulation shield segment 7 are arranged at intervals.
The first joint insulation shielding section 6 is provided with an extension section 8, the extension section 8 is positioned at the inner side of the second joint insulation shielding section 7, the second joint insulation main body section 5 is positioned between the extension section 8 and the second joint insulation shielding section 7, and the extension section 8 is parallel to the second joint insulation shielding section 7, so that the second joint insulation main body section 5 can be positioned between the first joint insulation shielding section 6 and the second joint insulation shielding section 7, and the requirement of the joint insulation shielding layer on electrical disconnection is met while the electric field distribution control is realized.
And a semi-conductive buffer water-blocking tape 9 is wrapped at the outer sides of the first joint insulating shielding section 6 and the second joint insulating shielding section 7 in a semi-lap mode, and the semi-conductive buffer water-blocking tape 9 is used for preventing wrinkles from existing on the inner surface of the thin lead belt 10 to damage the joint insulating shielding layers.
The thin lead belt 10 is wrapped on the outer side of the semi-conductive buffering water-blocking belt 9 in a semi-lap winding mode, the thin lead belt 10 is overlapped with the corrugated lead sheaths 1 on the two sides of the cable conductor, the thin lead belt 10 and the corrugated lead sheaths 1 are tightly tied through fine copper wires, the thin lead belt 10 is soft in texture, damage to the joint insulating shielding layer can be reduced compared with a copper wire mesh belt, the copper wire mesh belt is pointed and can pierce the joint insulating shielding layer, and the thin lead belt 10 is matched with the semi-conductive buffering water-blocking belt 9 to play a dual protection role.
A space exists between the first joint insulating and shielding section 6 and the second joint insulating and shielding section 7, a nonlinear stress control band 11 is wrapped at the outer side of the space in a semi-lap winding manner, and the nonlinear stress control band 11 is overlapped with the semi-conductive buffer water-blocking bands 9 at the two sides
After the joint insulating and shielding layer is electrically disconnected, a geometric shape method (namely, the cut-off part of the joint insulating and shielding layer is arranged at the extending section 8 to enable a zero potential to form a horn shape and improve the electric field distribution of the joint insulating and shielding layer) and a parameter control method (adopting a nonlinear resistance material to manufacture the nonlinear stress control tape 11 which is wrapped on the cut-off part of the joint insulating and shielding layer and improves the problem of stress concentration at the cut-off part) are simultaneously applied to improve the electric stress at the shielding port, so that the electric field distribution and the electric field intensity are in the best state, and the reliability and the service life of the product in operation are improved.
A first waterproof insulating self-adhesive tape 12, first waterproof insulating self-adhesive tape 12 is half lapped around the package in this joint main part outside, and the joint main part to having played waterproof insulating effect.
An insulating copper shell, the insulating copper shell is moulded copper shell 13 by first package and is moulded copper shell 14 by the second package and constitute, first package mould copper shell 13 with all be equipped with earth connection copper pipe 15 on the copper shell 14 is moulded to the second package, first package mould copper shell 13 with on the copper shell 14 is moulded to the second package earth connection copper pipe 15's mouth of pipe direction is the same, earth connection copper pipe 15 is used for placing of earth connection.
First plastic-coated copper shell 13 with copper shell 14 is moulded to the second package is installed respectively in the both sides of this joint main part, first plastic-coated copper shell 13 with install insulating ring 16 between the copper shell 14 is moulded to the second package, first plastic-coated copper shell 13 with copper shell 14 is moulded to the second package with pass through the screw fastening between the insulating ring 16, insulating ring 16 makes first plastic-coated copper shell 13 with it is insulating between the copper shell 14 is moulded to the second package.
A sealing ring 17 is arranged in a contact surface of the insulating ring 16 between the first plastic-coated copper shell 13 and the second plastic-coated copper shell 14, and the sealing ring 17 is used for sealing the first plastic-coated copper shell 13, the second plastic-coated copper shell 14 and the insulating ring 16.
First package mould copper shell 13 with copper shell 14 is moulded to the second package and both ends wrinkle lead sheath 1 is connected, first package mould copper shell 13 with copper shell 14 is moulded to the second package and both ends connect through lead sealing 18 between the wrinkle lead sheath 1, lead sealing 18 is used for first package mould copper shell 13 with copper shell 14 is moulded to the second package and both ends sealed and fixed between the wrinkle lead sheath 1.
A first heat-shrinkable tube 19 is installed on the outer side of the lead seal 18, and the first heat-shrinkable tube 19 not only protects the lead seal 18, but also is used for fixedly connecting the first plastic-coated copper shell 13 and the second plastic-coated copper shell 14 with the cable surface.
A joint strip 22, joint strip 22 is closely around the package in the both sides of insulator ring 16 to with shown first package mould copper shell 13 with the second package mould copper shell 14 surface is connected, insulator ring 16 with it has second waterproof insulating self-adhesive tape 20 still closely to wind on the joint strip 22, second heat shrinkage bush 21 is installed in the waterproof insulating self-adhesive tape 20 outside of second, second heat shrinkage bush 21 has not only played the guard action, provides even stiction simultaneously and realizes waterproof sealing.
Compared with the prior art, the utility model relates to a high pressure crosslinked polyethylene insulated cable mould formula insulated joint, this insulated joint structural integration are not influenced by expend with heat and contract with cold, and waterproof performance is good, and electric field and thermal field distribute evenly stably, and electrical properties is excellent, and life is lasting, and joint structural compactness, the size is little, and occupation space is little, can satisfy arranging in narrow and small worker's well, reduces the capital construction cost.
After the joint insulating and shielding layer is electrically disconnected, a geometric shape method (to be applied to the cut-off position of the joint insulating and shielding layer) and a parameter control method (made of nonlinear resistance materials) are applied to the extending section to form a horn shape at zero potential, so that the electric field distribution of the joint insulating and shielding layer is improved, and the nonlinear stress control band is wrapped on the cut-off position of the joint insulating and shielding layer to improve the stress concentration at the position) to improve the electric stress at the shielding port, so that the electric field distribution and the electric field intensity are in the best state, and the reliability and the service life of the product are improved.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A high-voltage cross-linked polyethylene insulated cable molding type insulated joint is characterized by comprising:
the cable comprises a nylon belt, a cable conductor and a cable conductor, wherein the nylon belt is wrapped on the outer sides of two cable conductors which are mutually butted in a half-lapping way, and a joint conductor shielding layer is wrapped outside the nylon belt;
a splice insulation body layer comprised of a first splice insulation body segment and a second splice insulation body segment, the first splice insulation body segment wrapped around the exterior of the splice conductor shield layer;
the joint insulation shielding layer consists of a first joint insulation shielding section and a second joint insulation shielding section, an extension section is arranged on the first joint insulation shielding section and is positioned at the inner side of the second joint insulation shielding section, a second joint insulation main body section is positioned between the extension section and the second joint insulation shielding section, a semi-conductive buffer water-blocking tape is semi-lapped at the outer sides of the first joint insulation shielding section and the second joint insulation shielding section, a thin lead belt is semi-lapped at the outer side of the semi-conductive buffer water-blocking tape and is overlapped with corrugated lead sheaths at two sides of the cable conductor, a space is formed between the first joint insulation shielding section and the second joint insulation shielding section, and a nonlinear stress control tape is semi-lapped and wrapped at the outer side of the space;
the first waterproof insulating self-adhesive tape is wrapped on the outer side of the joint main body in a semi-overlapping mode;
the insulating copper shell consists of a first plastic-coated copper shell and a second plastic-coated copper shell, wherein the first plastic-coated copper shell and the second plastic-coated copper shell are both provided with grounding wire copper pipes, the first plastic-coated copper shell and the second plastic-coated copper shell are respectively arranged at two sides of the joint main body, an insulating ring is arranged between the first plastic-coated copper shell and the second plastic-coated copper shell, a sealing ring is arranged between the first plastic-coated copper shell and the second plastic-coated copper shell and in a contact surface of the insulating ring, and the first plastic-coated copper shell and the second plastic-coated copper shell are connected with the corrugated lead sheaths at two ends;
and the sealing rubber strip is tightly wrapped on two sides of the insulating ring and is connected with the surfaces of the first plastic-coated copper shell and the second plastic-coated copper shell, a second waterproof insulating self-adhesive tape is tightly wrapped on the insulating ring and the sealing rubber strip, and a second heat-shrinkable sleeve is installed on the outer side of the second waterproof insulating self-adhesive tape.
2. The molded insulated joint of a high voltage crosslinked polyethylene insulated cable according to claim 1, wherein: the first connector insulation body segment cooperates with the first connector insulation shield segment.
3. The molded insulated joint of a high voltage crosslinked polyethylene insulated cable according to claim 1, wherein: the joint conductor shielding layer and the conductor shielding of the cable body are mutually cross-linked and combined into a whole.
4. The molded insulated joint of a high voltage crosslinked polyethylene insulated cable according to claim 1, wherein: the nonlinear stress control band is overlapped with the semi-conductive buffer water-blocking bands on the two sides.
5. The molded insulated joint of a high voltage crosslinked polyethylene insulated cable according to claim 1, wherein: the thin lead belt and the corrugated lead sheath are fastened through a fine copper wire.
6. The molded insulated joint of a high voltage crosslinked polyethylene insulated cable according to claim 1, wherein: the extension section is parallel to the second connector insulating shield section.
7. The molded insulated joint of a high voltage crosslinked polyethylene insulated cable according to claim 1, wherein: the first plastic-coated copper shell and the second plastic-coated copper shell are fastened with the insulating ring through screws.
8. The molded insulated joint of a high voltage crosslinked polyethylene insulated cable according to claim 1, wherein: the first plastic-coated copper shell and the second plastic-coated copper shell are provided with the same direction of the pipe orifice of the grounding wire copper pipe.
9. The molded insulated joint of a high voltage crosslinked polyethylene insulated cable according to claim 1, wherein: the first plastic-coated copper shell and the second plastic-coated copper shell are connected with the corrugated lead sheaths at two ends through lead seals.
10. The molded insulated joint of a high voltage cross-linked polyethylene insulated cable according to claim 9, wherein: and a first heat-shrinkable sleeve is arranged on the outer side of the lead seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920924709.9U CN209929940U (en) | 2019-06-19 | 2019-06-19 | High-voltage crosslinked polyethylene insulated cable molding type insulated joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920924709.9U CN209929940U (en) | 2019-06-19 | 2019-06-19 | High-voltage crosslinked polyethylene insulated cable molding type insulated joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209929940U true CN209929940U (en) | 2020-01-10 |
Family
ID=69093000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920924709.9U Active CN209929940U (en) | 2019-06-19 | 2019-06-19 | High-voltage crosslinked polyethylene insulated cable molding type insulated joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209929940U (en) |
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2019
- 2019-06-19 CN CN201920924709.9U patent/CN209929940U/en active Active
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