CN117954152B - 6-35KV polypropylene insulated cable and preparation equipment thereof - Google Patents
6-35KV polypropylene insulated cable and preparation equipment thereof Download PDFInfo
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- CN117954152B CN117954152B CN202410322871.9A CN202410322871A CN117954152B CN 117954152 B CN117954152 B CN 117954152B CN 202410322871 A CN202410322871 A CN 202410322871A CN 117954152 B CN117954152 B CN 117954152B
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 50
- -1 polypropylene Polymers 0.000 title claims abstract description 50
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 238000009413 insulation Methods 0.000 claims abstract description 82
- 239000004020 conductor Substances 0.000 claims abstract description 73
- 238000000465 moulding Methods 0.000 claims abstract description 61
- 238000002955 isolation Methods 0.000 claims abstract description 56
- 239000002184 metal Substances 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 claims abstract description 6
- 238000001125 extrusion Methods 0.000 claims description 101
- 230000005540 biological transmission Effects 0.000 claims description 37
- 238000007789 sealing Methods 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 26
- 230000007246 mechanism Effects 0.000 claims description 19
- 230000007306 turnover Effects 0.000 claims description 11
- 239000012774 insulation material Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 14
- 230000009467 reduction Effects 0.000 abstract description 3
- 229920000114 Corrugated plastic Polymers 0.000 abstract 1
- 230000005672 electromagnetic field Effects 0.000 description 15
- 239000011810 insulating material Substances 0.000 description 12
- 230000007423 decrease Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005253 cladding Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 229910001006 Constantan Inorganic materials 0.000 description 2
- 229910001128 Sn alloy Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- LQBJWKCYZGMFEV-UHFFFAOYSA-N lead tin Chemical compound [Sn].[Pb] LQBJWKCYZGMFEV-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001120 nichrome Inorganic materials 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0216—Two layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of polypropylene insulated cables, in particular to a 6-35kV polypropylene insulated cable and preparation equipment thereof, which comprises a conductor core and an isolation layer, wherein the conductor core is provided with a plurality of conductive cores, and the isolation layer is arranged outside the conductor core; the inner insulating layer is arranged on the outer layer of the isolation layer, the outer insulating layer is arranged on the outer layer of the inner insulating layer, the contact surface of the inner insulating layer and the outer insulating layer is wavy, the inner insulating layer and the outer insulating layer form an integral insulating layer, the inner wall of the inner insulating layer is regular cylindrical, the outer wall of the outer insulating layer is regular cylindrical, the armor layer is arranged on the outer layer of the outer insulating layer, the armor layer is formed by winding metal wires, and the outer layer of the armor layer is provided with the jacket; the novel corrugated plastic insulation cable can efficiently perform wave-shaped molding on the insulation layer, improves the flexible performance of the cable, reduces the reduction of the insulation effect, and has good practicability.
Description
Technical Field
The invention relates to the technical field of polypropylene insulated cables, in particular to a 6-35kV polypropylene insulated cable and preparation equipment thereof.
Background
The polypropylene insulated cable is a cable using a polypropylene material as an insulating layer. Polypropylene is a thermoplastic resin having good insulation properties, mechanical properties and heat resistance, and thus is widely used in the field of cable manufacturing. The 6-35kV polypropylene insulated cable is widely applied to power transmission lines, and the existing 6-35kV polypropylene insulated cable is generally provided with a conductor, an isolation layer, an insulation layer, an armor layer, a sheath and the like from the core part outwards in sequence. The insulation layer is made of polypropylene insulation material, the existing polypropylene insulation layer is generally in a regular cylinder shape, the wall thickness of the cylinder wall is uniform, so that the polypropylene insulation cable is high in hardness and not easy to bend, and the insulation layer is easy to crack after being bent for many times, and improvement is needed.
The existing cable production equipment has a plurality of devices, for example, a double-layer co-extrusion die for cables, a double-layer co-extrusion method for cables and the cable production equipment are disclosed in Chinese patent publication No. CN114914038B, and the double-layer co-extrusion die for cables is characterized in that a radiating groove is arranged in a left die, so that the radiating groove is skillfully positioned between a first annular gap and a second annular gap, and heat transfer of a sheath material in the second annular gap to an insulating material in the first annular gap can be effectively reduced through heat exchange of the radiating groove, and aging and decomposition of the insulating material caused by overhigh temperature of the insulating material are avoided; through set up the fan-shaped hole on left mould, set up the semicircle orifice on right mould, and cooperate the cylinder of semicircle pillar structure, make when needs fixed left mould and right mould, clockwise rotation cylinder, make the outer ring tooth meshing on the cylinder in the arc groove of fan-shaped hole and semicircle orifice and when need not fixed left mould and right mould, anticlockwise rotation cylinder, make the outer ring tooth on the cylinder mesh the arc groove of semicircle orifice only, be equivalent to the whole embedding of cylinder in the semicircle orifice, this just makes right mould can remove relative left mould, adjust annular gap two's size, adjust annular gap two medium sheath material's volume, both be favorable to when left mould temperature is low, improve sheath material's cooling condition, still be favorable to when left mould temperature is high, reduce sheath material to insulating material's temperature influence.
However, the existing cable production equipment cannot be improved in terms of the shape of the polypropylene insulation layer of the cable, so that corresponding improvements are required in order to accommodate the improvement in terms of the shape of the polypropylene insulation layer.
Disclosure of Invention
In order to solve the technical problems, the invention provides the 6-35kV polypropylene insulated cable which can efficiently perform wave-shaped molding on an insulating layer, improve the flexible performance of the cable, reduce the reduction of the insulating effect and has good practicability, and the preparation equipment thereof.
The invention relates to a 6-35kV polypropylene insulated cable, which comprises a conductor core and an isolation layer, wherein the conductor core is provided with a plurality of conductive cores, and the isolation layer is arranged outside the conductor core; the inner insulating layer is arranged on the outer layer of the isolation layer, the outer insulating layer is arranged on the outer layer of the inner insulating layer, the contact surface of the inner insulating layer and the outer insulating layer is wavy, the inner insulating layer and the outer insulating layer form an integral insulating layer, the inner wall of the inner insulating layer is regular cylindrical, the outer wall of the outer insulating layer is regular cylindrical, the armor layer is arranged on the outer layer of the outer insulating layer, the armor layer is formed by winding metal wires, and the outer layer of the armor layer is provided with the jacket; the conductor core is used for carrying the electric current, the electromagnetic field that the isolation layer produced the conductor core carries out preliminary isolation, reduce the interference to other equipment, interior insulating layer and outer insulating layer cooperation are insulated the conductor core, further keep apart the electromagnetic field that the conductor core produced simultaneously, the armor protects the cable, improve the mechanical strength of cable, the electromagnetic field that the armor produced the conductor core carries out isolation once more simultaneously, when the cable is crooked, the wave contact surface of interior insulating layer and outer insulating layer takes place deformation and dislocation, the extension effect of interior insulating layer and outer insulating layer has been increased, make the hardness of cable decline, make things convenient for the cable crooked, moreover, the crack is difficult to take place for in interior insulating layer and outer insulating layer, because the insulating layer that interior insulating layer and outer insulating layer constitute is whole to be regular cylinder, can not lead to the insulating effect decline, the practicality is good.
Preferably, the lateral cross section of the contact surface of the inner and outer insulation layers is petal-shaped, and the petal-shaped cross section is arranged along the longitudinal direction of the inner and outer insulation layers along the spiral line.
Preferably, the longitudinal section of the contact surface of the inner insulating layer and the outer insulating layer is wavy, and the wavy section is arranged rotationally along the central axis of the inner insulating layer and the outer insulating layer.
Preferably, a plurality of fusible wires are woven in the wires in the armor layer side by side; the plurality of fusible metal wires are wound on the outer wall of the outer insulating layer side by side with the common metal wires to form an armor layer, when the insulativity and electromagnetic isolation performance of the isolating layer, the inner insulating layer and the outer insulating layer on the conductor core are not reduced, the induced current generated on the armor layer is smaller, the heating value of the armor layer is very low, and the fusible metal wires are not fused at the moment; when the insulation property and the electromagnetic isolation property of the insulating layer, the inner insulating layer and the outer insulating layer to the conductor core are reduced, a larger induction current is generated at the position of the armor layer, which is opposite to the insulation failure, so that the corresponding local heating value of the armor layer is increased, and at the moment, the fusible metal wire is fused; the armor layer is provided with a hole at the insulation breakage position, so that an electromagnetic field generated by the conductor core is released to the outside through the hole, and a worker for line inspection can receive the electromagnetic signal through the signal receiver, thereby roughly determining the insulation breakage failure position of the cable and improving the convenience of insulation detection of the cable; the fusible metal wire can be a nichrome wire, a constantan wire, a lead-tin alloy wire and the like, and the receiver can be an improved interphone, a frequency modulation radio and the like.
The invention relates to preparation equipment of a 6-35kV polypropylene insulated cable, which comprises a rack, a driven wheel, a driving wheel, a motor, a first extrusion head, a second extrusion head, a worm, a transmission shaft, a worm wheel, a first gear, a second gear and a molding mechanism, wherein the driven wheel is rotatably arranged on the rack; conductor core and isolation layer centre gripping are between follow driving wheel and action wheel, motor drive action wheel rotates, the action wheel rotates friction conductor core, with conductor core to extrude first and extrude first two transport, the extruder is with the polypropylene insulation material hot melt back input to extrude first and extrude first two in, conductor core and isolation layer pass through extrusion first one on the outer wall cladding inner insulation layer of isolation layer, when passing through extrusion first two on the outer wall cladding outer insulation layer of inner insulation layer, drive worm rotation when conductor core and isolation layer are carried to the action wheel, worm and worm wheel meshing drive transmission shaft rotate, the transmission shaft drives gear two rotations through gear one, gear two drive molding machine constructs the operation, make the speed that molding machine carried inner insulation layer to conductor core and isolation layer match with the wave, make the wave more even, the practicality is good.
Preferably, the device further comprises a cooling sleeve, wherein the cooling sleeve is arranged between the conductor core and the extrusion head II, and the cooling sleeve cools and solidifies the inner insulating layer; the inner insulating layer is cooled and solidified through the cooling sleeve, so that the wavy outer surface of the inner insulating layer is solidified, fusion of the outer insulating layer, the inner wall and the inner insulating layer is avoided, and a wavy contact surface between the inner insulating layer and the outer insulating layer is effectively formed.
Preferably, the molding mechanism comprises a shell, a molding ring, a molding lug, a gear ring and a bearing, wherein the shell is arranged between the extrusion nozzle I of the extrusion head I and the cooling sleeve, a plurality of molding lugs are uniformly arranged on the circumference of the inner wall of the molding ring, the molding lugs are hemispherical, the gear ring is arranged on the outer wall of the molding ring, the gear ring is meshed with the gear II for transmission, the molding ring is rotatably arranged in the shell through the bearing, the inner diameter of the molding ring is the same as the inner diameter of the extrusion nozzle I of the extrusion head I, and the molding ring is concentrically aligned with the extrusion nozzle I of the extrusion head I; the gear II is meshed with the gear ring to drive the molding ring to rotate under the rotation support of the bearing, the molding ring drives the molding lugs to rotate, meanwhile, the outer layer of the isolation layer is extruded out of the first cladding inner insulating layer and is conveyed backwards, the plurality of molding lugs extrude a plurality of spiral grooves on the outer wall of the uncured inner insulating layer, the extrusion nozzle II of the extrusion head II fills the polypropylene insulating material with the plurality of spiral grooves of the inner insulating layer and forms an outer insulating layer, and therefore the contact surface of the inner insulating layer and the outer insulating layer forms a spiral wave shape, and the practicability is good.
Preferably, the molding mechanism comprises a shell, a first slip ring, a second slip ring, an elastic sheet, a reciprocating screw rod, a first sliding block and a second sliding block, wherein the first slip ring and the second sliding ring are concentrically aligned with the first extrusion nozzle of the first extrusion head, the first sliding ring is positioned at the rear side of the interior of the shell, the second sliding ring is movably arranged at the front side of the interior of the shell, a plurality of elastic sheets are arranged between the first sliding ring and the second sliding ring, the elastic sheets can be inwards bent, an elastic film is arranged at the inner side of the elastic sheets, the reciprocating screw rod is rotatably arranged in the shell, the front end of the reciprocating screw rod is concentrically connected with the second sliding block, one sliding block is rotatably arranged at the position where a guide groove is not arranged at the rear end of the reciprocating screw rod, the first sliding block is connected with the first sliding ring, the second sliding block is rotatably arranged on the reciprocating screw rod, and the second sliding block is in transmission connection with the guide groove of the reciprocating screw rod; the gear II drives the reciprocating screw rod to rotate, the sliding block II moves reciprocally along the guide groove of the reciprocating screw rod, when the sliding block II moves closer to the sliding block I, the sliding block II drives the sliding ring II to be close to the sliding ring I, the sliding ring I and the sliding ring II compress a plurality of elastic pieces, the elastic pieces are inwards bent and protruded, the elastic films are inwards protruded to form a narrower channel than the extrusion nozzle I of the extrusion head I, a transverse concave ring is formed on the outer wall of the inner insulating layer, when the sliding block II moves away from the sliding block I, the sliding block II drives the sliding ring II to be away from the sliding ring I, the elastic pieces are straightened, the channel in the elastic films on the inner sides of the elastic pieces is enlarged, a concave ring with interval is formed on the outer wall of the inner insulating layer, the contact surface of the inner insulating layer and the outer insulating layer is in a wave shape in the longitudinal direction, and the practicability is good.
Preferably, the device further comprises a front sealing sleeve and a rear sealing sleeve, wherein the rear end of the front sealing sleeve is concentrically connected with the front end of the second slip ring, the front end of the front sealing sleeve is slidably inserted into the first extrusion nozzle of the first extrusion head, the outer wall of the front sealing sleeve is in sliding contact with the inner wall of the first extrusion nozzle of the first extrusion head, the front end of the rear sealing sleeve is concentrically connected with the rear end of the first slip ring, the front end of the rear sealing sleeve is slidably inserted into the cooling sleeve, and the outer wall of the rear sealing sleeve is in sliding contact with the inner wall of the cooling sleeve; the front sealing sleeve and the rear sealing sleeve are matched with elastic films on the inner sides of the elastic sheets to isolate the polypropylene insulating material in the first input shell of the extrusion head, so that the polypropylene insulating material is prevented from entering the shell, and the tightness is improved.
Preferably, the device further comprises a long hook plate, a hook seat and a turnover plate, wherein the front end and the rear end of the guide groove of the reciprocating screw are respectively provided with a straight guide groove parallel to the reciprocating screw, the first slider is in transmission connection with the guide groove of the reciprocating screw, the front end of the long hook plate is connected with the second slider, the rear end of the long hook plate is provided with a hook facing the reciprocating screw, the hook seat is elastically rotatably arranged on the first slider, the front end of the hook seat is provided with the hook plate, the hook plate is matched with the hook of the long hook plate, the elasticity enables the hook seat to reset to align the hook plate with the hook, when the hook plate is aligned with the hook, the first slider limits and blocks the front end of the hook seat, one end of the turnover plate facing the reciprocating screw is rotatably connected with the rear end of the hook seat, the rear end of the hook seat is provided with a limiting structure of the turnover plate, and the limiting structure enables the rear side wall of the turnover plate to block when the turnover plate is turned towards the front end of the hook seat, the turnover plate is lapped on the hook plate of the hook seat; the gear II drives the reciprocating screw rod to rotate, the guide groove on the reciprocating screw rod drives the sliding block II and the sliding block I to move along the reciprocating screw rod, the sliding block II and the sliding block I are connected with the curved guide groove of the reciprocating screw rod and synchronously move forwards, when the sliding block II enters the guide groove of the reciprocating screw rod, the sliding block I continuously moves forwards to push the sliding block II to reach the front end of the straight guide groove, the sliding block I continuously moves forwards to drive the sliding ring I to be close to the sliding ring II, a plurality of elastic sheets are inwards bent, the elastic sheets inwards bulge elastic films, the outer wall of the inner insulating layer is molded, the hook of the long hook plate is connected with the hook of the hook seat, at the moment, the sliding block I reaches the front end of the curved guide groove of the reciprocating screw rod and moves backwards, the hook of the long hook plate is matched with the sliding block I to be connected with the sliding block II, and accordingly the sliding block II is pulled onto the curved guide groove of the reciprocating screw rod, the second slider and the first slider synchronously move backwards along the reciprocating screw rod, when the first slider moves into the rear end of the straight guide groove at the rear end of the reciprocating screw rod, the second slider continuously approaches the first slider, so that the long hook plate pushes against the overturning plate, the hook seat is overturned backwards until the hooks of the long hook plate extend out of the rear side of the top end of the overturning plate, at the moment, the second slider reaches the rear end of the curved guide groove of the reciprocating screw rod and moves forwards, at the moment, the hooks of the long hook plate pull the overturning plate towards the front end of the hook seat, so that the overturning plate is lapped on the hooks of the hook seat, the hooks of the long hook plate cannot hook on the hook plate of the hook seat, unhook of the long hook plate and the hook seat is realized, the second slider continuously moves forwards, a plurality of elastic sheets straighten and then drive the sliding ring and the first slider to move forwards, so as to realize reciprocating movement of the sliding ring and the second slider, and the outer wall of the inner insulating layer are molded in the backward movement process, the outer wall of the inner insulating layer cannot be molded in the forward moving process, and the curve guide groove of the reciprocating screw rod is optimized, so that the moving speed of the second sliding block and the first sliding block is the same as the conveying speed of the conductor core and the isolating layer, scratches on the outer wall of the inner insulating layer can be reduced, and the molding effect is improved.
Compared with the prior art, the invention has the beneficial effects that: the conductor core is used for carrying the electric current, the electromagnetic field that the isolation layer produced the conductor core carries out preliminary isolation, reduce the interference to other equipment, interior insulating layer and outer insulating layer cooperation are insulated the conductor core, further keep apart the electromagnetic field that the conductor core produced simultaneously, the armor protects the cable, improve the mechanical strength of cable, the electromagnetic field that the armor produced the conductor core carries out isolation once more simultaneously, when the cable is crooked, the wave contact surface of interior insulating layer and outer insulating layer takes place deformation and dislocation, the extension effect of interior insulating layer and outer insulating layer has been increased, make the hardness of cable decline, make things convenient for the cable crooked, moreover, the crack is difficult to take place for in interior insulating layer and outer insulating layer, because the insulating layer that interior insulating layer and outer insulating layer constitute is whole to be regular cylinder, can not lead to the insulating effect decline, the practicality is good.
Drawings
FIG. 1 is a schematic diagram showing the axial structure of a cable preparing apparatus in example 4 of the present invention;
Fig. 2 is a schematic side sectional structure of a cable preparation apparatus in example 4 of the present invention;
FIG. 3 is a schematic view showing a partially sectioned structure of an axial measurement of a cable preparation apparatus in example 4 of the present invention;
Fig. 4 is a schematic structural view of a molding mechanism of the cable preparation apparatus in example 4 of the present invention;
fig. 5 is a schematic view of the structure of the cable in embodiment 1 of the present invention;
FIG. 6 is a schematic diagram showing the axial structure of a cable preparing apparatus in example 5 of the present invention;
fig. 7 is a schematic side sectional structure of a cable preparation apparatus in example 5 of the present invention;
FIG. 8 is a schematic view showing a partially sectioned structure of an axial measurement of a cable preparation apparatus in example 5 of the present invention;
Fig. 9 is a schematic structural view of a molding mechanism of the cable preparation apparatus in example 6 of the present invention;
FIG. 10 is a schematic view of a partial enlarged structure at A in FIG. 9;
fig. 11 is a schematic view of the structure of a cable in embodiment 2 of the present invention;
Fig. 12 is a schematic side sectional structure of the cable in embodiment 2 of the present invention.
The reference numerals in the drawings: 1. a conductor core; 2. an isolation layer; 3. an inner insulating layer; 4. an outer insulating layer; 5. an armor layer; 6. a sheath; 7. a frame; 8. driven wheel; 9. a driving wheel; 10. a motor; 11. an extrusion head I; 12. extrusion head II; 13. a worm; 14. a transmission shaft; 15. a worm wheel; 16. a cooling jacket; 17. shaping rings; 18. molding the convex blocks; 19. a gear ring; 20. a bearing; 21. a first slip ring; 22. a slip ring II; 23. a spring plate; 24. a reciprocating screw rod; 25. a first sliding block; 26. a second slide block; 27. a front sealing sleeve; 28. a rear sealing sleeve; 29. a long hook plate; 30. a hook seat; 31. a turnover plate; 32. a first gear; 33. and a second gear.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. This invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Example 1
As shown in fig. 5, a 6-35kV polypropylene insulated cable comprises a conductor core 1 and an isolation layer 2, wherein the conductor core 1 is provided with a plurality of conductive cores, and the isolation layer 2 is arranged outside the conductor core 1; the novel high-voltage insulation cable further comprises an inner insulating layer 3, an outer insulating layer 4, an armor layer 5 and a sheath 6, wherein the inner insulating layer 3 is arranged on the outer layer of the isolation layer 2, the outer insulating layer 4 is arranged on the outer layer of the inner insulating layer 3, the contact surface of the inner insulating layer 3 and the outer insulating layer 4 is wave-shaped, the inner wall of the inner insulating layer 3 and the outer insulating layer 4 form an integral insulating layer, the inner wall of the inner insulating layer 3 is regular cylinder, the outer wall of the outer insulating layer 4 is regular cylinder, the armor layer 5 is arranged on the outer layer of the outer insulating layer 4, the armor layer 5 is formed by winding metal wires, and the sheath 6 is arranged on the outer layer of the armor layer 5; the lateral cross section of the contact surface of the inner insulating layer 3 and the outer insulating layer 4 is petal-shaped, and the petal-shaped cross section is arranged along the longitudinal direction of the inner insulating layer 3 and the outer insulating layer 4 along a spiral line.
The conductor core 1 is used for carrying the electric current, the electromagnetic field that the isolation layer 2 produced conductor core 1 carries out preliminary isolation, reduce the interference to other equipment, the cooperation of inner insulating layer 3 and outer insulating layer 4 is insulating conductor core 1, further keep apart the electromagnetic field that produces conductor core 1 simultaneously, armor 5 protects the cable, improve the mechanical strength of cable, the electromagnetic field that the armor 5 produced conductor core 1 is kept apart once more simultaneously, when the cable crooked, the petal spiral wave contact surface of inner insulating layer 3 and outer insulating layer 4 takes place deformation and dislocation, the extension effect of inner insulating layer 3 and outer insulating layer 4 has been increased, make the hardness of cable decline, make things convenient for the cable crooked, moreover, inner insulating layer 3 and outer insulating layer 4 are difficult to take place the fracture, because the insulating layer that inner insulating layer 3 and outer insulating layer 4 constitute is whole regular cylinder, can not lead to the insulation effect decline.
Example 2
As shown in fig. 11 and 12, a 6-35kV polypropylene insulated cable comprises a conductor core 1 and an isolation layer 2, wherein the conductor core 1 is provided with a plurality of conductive cores, and the isolation layer 2 is arranged outside the conductor core 1; the novel high-voltage insulation cable further comprises an inner insulating layer 3, an outer insulating layer 4, an armor layer 5 and a sheath 6, wherein the inner insulating layer 3 is arranged on the outer layer of the isolation layer 2, the outer insulating layer 4 is arranged on the outer layer of the inner insulating layer 3, the contact surface of the inner insulating layer 3 and the outer insulating layer 4 is wave-shaped, the inner wall of the inner insulating layer 3 and the outer insulating layer 4 form an integral insulating layer, the inner wall of the inner insulating layer 3 is regular cylinder, the outer wall of the outer insulating layer 4 is regular cylinder, the armor layer 5 is arranged on the outer layer of the outer insulating layer 4, the armor layer 5 is formed by winding metal wires, and the sheath 6 is arranged on the outer layer of the armor layer 5; the longitudinal section of the contact surface of the inner insulating layer 3 and the outer insulating layer 4 is wavy, and the wavy section is arranged rotationally along the central axis of the inner insulating layer 3 and the outer insulating layer 4.
The conductor core 1 is used for carrying electric current, the electromagnetic field that the isolation layer 2 produced conductor core 1 carries out preliminary isolation, reduce the interference to other equipment, the cooperation of inner insulating layer 3 and outer insulating layer 4 is insulating conductor core 1, further keep apart the electromagnetic field that produces conductor core 1 simultaneously, armor 5 protects the cable, improve the mechanical strength of cable, the electromagnetic field that the armor 5 produced conductor core 1 keeps apart once more simultaneously, when the cable is crooked, the wave contact surface of inner insulating layer 3 and outer insulating layer 4 takes place deformation and dislocation, the extension effect of inner insulating layer 3 and outer insulating layer 4 has been increased, make the hardness of cable decline, make things convenient for the cable to crooked, moreover, inner insulating layer 3 and outer insulating layer 4 are difficult to take place the crack, because the insulating layer that inner insulating layer 3 and outer insulating layer 4 constitute is whole to be regular cylinder, can not lead to the insulation effect decline.
Example 3
As shown in fig. 5, 11 and 12, a plurality of fusible wires are braided side by side in the wires in the armor 5 on the basis of embodiment 1 and embodiment 2.
The plurality of fusible metal wires are wound on the outer wall of the outer insulating layer 4 side by side and the common metal wires through the existing wire winding machine to form an armor layer 5, when the insulativity and electromagnetic isolation performance of the insulating layer 2, the inner insulating layer 3 and the outer insulating layer 4 on the conductor core 1 are not reduced, the induced current generated on the armor layer 5 is smaller, the heating value of the armor layer 5 is very low, and the fusible metal wires are not fused at the moment; when the insulation property and the electromagnetic isolation property of the conductor core 1 are reduced by the isolation layer 2, the inner insulation layer 3 and the outer insulation layer 4, larger induction current is generated at the position of the armor layer 5 corresponding to the insulation failure, so that the corresponding local heating value of the armor layer 5 is increased, and the fusible metal wire is fused at the moment; the armor layer 5 is enabled to generate a leak at the insulation breakage position, so that an electromagnetic field generated by the conductor core 1 is released to the outside through the leak, and a worker for line inspection can receive the electromagnetic signal through the signal receiver, so that the insulation breakage failure position of the cable is approximately determined, and the convenience of insulation detection of the cable is improved; the fusible metal wire can be a nichrome wire, a constantan wire, a lead-tin alloy wire and the like, and the receiver can be an improved interphone, an improved FM radio and the like.
Example 4
As shown in fig. 1 to 4, a 6-35kV polypropylene insulated cable preparation apparatus is used for producing a 6-35kV polypropylene insulated cable proposed in embodiment 1, and comprises a frame 7, a driven wheel 8, a driving wheel 9, a motor 10, a first extrusion head 11, a second extrusion head 12, a worm 13, a transmission shaft 14, a worm wheel 15, a first gear 32, a second gear 33 and a molding mechanism, wherein the driven wheel 8 is rotatably mounted on the frame 7, the driving wheel 9 is rotatably mounted on the frame 7 through the rotation shaft, the driving wheel 9 is positioned above the driven wheel 8, the driven wheel 8 and the driving wheel 9 clamp and convey a conductor core 1 and an isolation layer 2, the motor 10 is mounted on the frame 7, an output shaft of the motor 10 is in transmission connection with the rotation shaft of the driving wheel 9, an extruder of polypropylene insulation material is provided with a first extrusion head 11, the extrusion head 11 is provided with a first extrusion nozzle, the molding mechanism is arranged on the outer wall of an inner insulation layer 3, the rear part of the extrusion head 11 is connected with the second extrusion head 12, the extrusion head 12 is provided with the second extrusion nozzle, the second extrusion nozzle covers the outer wall of the polypropylene insulation material on the inner insulation layer 3, the worm wheel 9 is rotatably mounted on the first gear 14 and the transmission shaft 33 is rotatably meshed with the first gear 13, the first gear 33 is rotatably arranged on the transmission shaft 14, the first gear 33 is rotatably arranged on the concentric transmission shaft 13, and the second gear 33 is rotatably meshed with the second gear 13 is rotatably arranged on the transmission shaft 33, and is rotatably arranged on the transmission shaft 33; the cooling sleeve 16 is arranged between the conductor core 1 and the extrusion head II 12, and the cooling sleeve 16 cools and solidifies the inner insulating layer 3; the molding mechanism comprises a shell, a molding ring 17, a molding lug 18, a gear ring 19 and a bearing 20, wherein the shell is arranged between the extrusion nozzle I of the extrusion head I11 and the cooling sleeve 16, a plurality of molding lugs 18 are uniformly arranged on the circumference of the inner wall of the molding ring 17, the molding lugs 18 are hemispherical, the gear ring 19 is arranged on the outer wall of the molding ring 17, the gear ring 19 is meshed with the gear II 33 for transmission, the molding ring 17 is rotatably arranged in the shell through the bearing 20, the inner diameter of the molding ring 17 is identical to the inner diameter of the extrusion nozzle I of the extrusion head I11, and the molding ring 17 is concentrically aligned with the extrusion nozzle I of the extrusion head I11.
The conductor core 1 and the isolation layer 2 are clamped between the driven wheel 8 and the driving wheel 9, the motor 10 drives the driving wheel 9 to rotate, the driving wheel 9 rotates to rub the conductor core 1, the conductor core 1 is conveyed to the extrusion head I11 and the extrusion head II 12, the extruder inputs the polypropylene insulation material into the extrusion head I11 and the extrusion head II 12 after hot melting, the conductor core 1 and the isolation layer 2 are coated with the inner insulation layer 3 on the outer wall of the isolation layer 2 when passing through the extrusion head I11, the outer insulation layer 4 is coated on the outer wall of the inner insulation layer 3 when passing through the extrusion head II 12, the worm 13 is driven to rotate while the driving wheel 9 conveys the conductor core 1 and the isolation layer 2, the worm 13 and the worm wheel 15 are meshed with each other to drive the transmission shaft 14 to rotate, the transmission shaft 14 drives the gear II 33 to rotate through the gear I32, the gear II 33 is meshed with the gear ring 19 to drive the plastic ring 17 to rotate under the rotation support of the bearing 20, the molding ring 17 drives the molding lugs 18 to rotate, the outer layer of the isolation layer 2 is coated by the extrusion head 11 to coat the inner insulating layer 3 and is conveyed backwards, so that the molding lugs 18 extrude a plurality of spiral grooves on the outer wall of the uncured inner insulating layer 3, the extrusion nozzle II of the extrusion head 12 fills the spiral grooves of the inner insulating layer 3 with polypropylene insulating material and forms the outer insulating layer 4, the contact surface of the inner insulating layer 3 and the outer insulating layer 4 forms spiral wave shape, the molding ring 17 is linked with the driving wheel 9, the wave shape is matched with the conveying speed of the conductor core 1 and the isolation layer 2, the wave shape is more uniform, the inner insulating layer 3 is cooled and solidified through the cooling sleeve 16, the wave-shaped outer surface of the inner insulating layer 3 is solidified, the fusion of the outer insulating layer 4 and the inner wall and the inner insulating layer 3 is avoided, effectively forming a wavy contact surface between the inner insulating layer 3 and the outer insulating layer 4.
Example 5
As shown in fig. 6 to 8, a 6-35kV polypropylene insulated cable preparation apparatus is used for producing a 6-35kV polypropylene insulated cable proposed in embodiment 1, and comprises a frame 7, a driven wheel 8, a driving wheel 9, a motor 10, a first extrusion head 11, a second extrusion head 12, a worm 13, a transmission shaft 14, a worm wheel 15, a first gear 32, a second gear 33 and a molding mechanism, wherein the driven wheel 8 is rotatably mounted on the frame 7, the driving wheel 9 is rotatably mounted on the frame 7 through the rotation shaft, the driving wheel 9 is positioned above the driven wheel 8, the driven wheel 8 and the driving wheel 9 clamp and convey a conductor core 1 and an isolation layer 2, the motor 10 is mounted on the frame 7, an output shaft of the motor 10 is in transmission connection with the rotation shaft of the driving wheel 9, an extruder for polypropylene insulation material is provided with a first extrusion head 11, the extrusion head 11 is provided with a first extrusion nozzle, the molding mechanism is arranged on the outer wall of an inner insulation layer 3, the rear part of the extrusion head 11 is connected with the second extrusion head 12, the extrusion head 12 is provided with the second extrusion nozzle, the second extrusion nozzle covers the outer wall of the polypropylene insulation material on the inner insulation layer 3, the worm wheel 4 is rotatably mounted on the first gear 14 and the transmission shaft 33 is rotatably mounted on the frame 13, the transmission shaft 33 is concentrically arranged on the transmission shaft 13, and the first gear 33 is rotatably meshed with the transmission shaft 13, and the second gear 33 is rotatably mounted on the transmission shaft 13 is rotatably arranged on the transmission shaft 13; the cooling sleeve 16 is arranged between the conductor core 1 and the extrusion head II 12, and the cooling sleeve 16 cools and solidifies the inner insulating layer 3; the molding mechanism comprises a shell, a first slip ring 21, a second slip ring 22, an elastic sheet 23, a reciprocating screw 24, a first sliding block 25 and a second sliding block 26, wherein the first slip ring 21 and the second slip ring 22 are concentrically aligned with a first extrusion nozzle of the first extrusion head 11, the first slip ring 21 is positioned at the rear side of the interior of the shell, the second slip ring 22 is movably arranged at the front side of the interior of the shell, a plurality of elastic sheets 23 are arranged between the first slip ring 21 and the second slip ring 22, the plurality of elastic sheets 23 can be bent inwards, elastic films are arranged at the inner sides of the plurality of elastic sheets 23, the reciprocating screw 24 is rotatably arranged in the interior of the shell, the front end of the reciprocating screw 24 is concentrically connected with a second gear 33, the first sliding block 25 is rotatably arranged at the rear end of the reciprocating screw 24 and is not provided with a guide groove, the first sliding block 25 is connected with the first sliding ring 21, the second sliding block 26 is rotatably arranged on the reciprocating screw 24, and the second sliding block 26 is in transmission connection with the guide groove of the reciprocating screw 24; the front end of the front sealing sleeve 27 is concentrically connected with the front end of the slip ring II 22, the front end of the front sealing sleeve 27 is slidably inserted into the extrusion nozzle I of the extrusion head I11, the outer wall of the front sealing sleeve 27 is slidably contacted with the extrusion nozzle I inner wall of the extrusion head I11, the front end of the rear sealing sleeve 28 is concentrically connected with the rear end of the slip ring I21, the front end of the rear sealing sleeve 28 is slidably inserted into the cooling sleeve 16, and the outer wall of the rear sealing sleeve 28 is slidably contacted with the inner wall of the cooling sleeve 16.
When the driving wheel 9 and the driven wheel 8 are matched to convey the conductor core 1 and the isolation layer 2 backwards, the gear II 33 drives the reciprocating screw rod 24 to rotate, the sliding block II 26 moves reciprocally along the guide groove of the reciprocating screw rod 24, when the sliding block II 26 moves towards the sliding block I25, the sliding block II 26 drives the sliding ring II 22 to be close to the sliding ring I21, so that the sliding ring I21 and the sliding ring II 22 compress the elastic sheets 23, the elastic sheets 23 are bent inwards and protruded, the elastic sheets 23 protrude inwards to form a narrower channel than the extrusion nozzle I of the extrusion head I11, a transverse concave ring is formed on the outer wall of the inner insulating layer 3, when the sliding block II 26 moves away from the sliding block I25, the sliding block II 26 drives the sliding ring II 22 to be far away from the sliding ring I21, the elastic sheets 23 are straightened, the channel in the elastic sheets inside the elastic sheets 23 is enlarged, a spacing concave ring is formed on the outer wall of the inner insulating layer 3, the contact surface of the inner insulating layer 3 and the outer insulating layer 4 is longitudinally wavy, and the front sealing sleeve 27 and the rear sealing sleeve 28 cooperate with the elastic sheets inside the elastic sheets 23 to extrude the polypropylene insulating material in the head I11, and the polypropylene insulating material is prevented from entering the insulating material of the insulating sleeve.
Example 6
As shown in fig. 9 to 10, on the basis of embodiment 5, further include a long hook plate 29, a hook seat 30 and a turning plate 31, the front end and the rear end of the guide groove of the reciprocating screw 24 are both provided with straight guide grooves parallel to the reciprocating screw 24, the first slider 25 is in transmission connection with the guide groove of the reciprocating screw 24, the front end of the long hook plate 29 is connected with the second slider 26, the rear end of the long hook plate 29 is provided with a hook facing the reciprocating screw 24, the hook seat 30 is elastically rotatably mounted on the first slider 25, the front end of the hook seat 30 is provided with a hanging plate, the hanging plate is matched with the hook of the long hook plate 29, the elasticity resets the hook seat 30 to align the hanging plate with the hook, when the hanging plate is aligned with the hook, the first slider 25 limits the front end of the hook seat 30, the turning plate 31 is rotatably connected with the rear end of the hook seat 30, the rear end of the hook seat 30 is provided with a limit structure of the turning plate 31, the limit structure enables the rear side wall of the turning plate 31 to block the rear side wall of the turning plate 31, and when the turning plate 31 is turned over the front end of the hook seat 30, the hook seat 31 is overlapped on the hanging plate 31.
The gear II 33 drives the reciprocating screw 24 to rotate, the guide groove on the reciprocating screw 24 drives the slide II 26 and the slide I25 to move along the reciprocating screw 24, the slide II 26 and the slide I25 are connected with the curve guide groove of the reciprocating screw 24 and synchronously move forward, when the slide II 26 enters the value guide groove of the reciprocating screw 24, the slide I25 continues to move forward to push the slide II 26 to reach the front end of the straight guide groove, the slide I25 continues to move forward so as to drive the slide I21 to be close to the slide II 22, the elastic sheets 23 are inwards bent, the elastic sheets 23 enable the elastic sheets to inwards bulge, the outer wall of the inner insulating layer 3 is molded, the hook of the long hook plate 29 is hooked with the hook plate of the hook seat 30, at the moment, the slide I25 reaches the front end of the curve guide groove of the reciprocating screw 24 and moves backward, the slide I25 is connected with the slide II 26 through the hook seat 30 and the hook of the long hook plate 29, so that the second slider 26 is pulled to the curved guide groove of the reciprocating screw 24, the second slider 26 and the first slider 25 synchronously move backwards along the reciprocating screw 24, when the first slider 25 moves into the rear end of the straight guide groove at the rear end of the reciprocating screw 24, the second slider 26 is continuously close to the first slider 25, so that the long hook plate 29 pushes the overturning plate 31, the hook seat 30 is overturned backwards until the hook of the long hook plate 29 stretches out of the rear side of the top end of the overturning plate 31, at the moment, the second slider 26 reaches the rear end of the curved guide groove of the reciprocating screw 24 and moves forwards, at the moment, the hook of the long hook plate 29 pulls the overturning plate 31 towards the front end of the hook seat 30, so that the overturning plate 31 is lapped on the hook of the hook seat 30, the hook of the long hook plate 29 is not hooked on the hook plate of the hook seat 30, unhooking of the long hook plate 29 and the hook seat 30 is realized, the second slider 26 continuously moves forwards, the elastic pieces 23 are straightened to drive the sliding ring I21 and the sliding block I25 to move forwards, so that the sliding ring I21 and the sliding ring II 22 can reciprocate, the outer wall of the inner insulating layer 3 is molded in the backward moving process, the outer wall of the inner insulating layer 3 cannot be molded in the forward moving process, the curve guide groove of the reciprocating screw rod 24 is optimized, the moving speed of the sliding block II 26 and the sliding block I25 is the same as the conveying speed of the conductor core 1 and the isolation layer 2, scratches on the outer wall of the inner insulating layer 3 can be reduced, and the molding effect is improved.
As shown in figures 1 to 12, in the 6-35kV polypropylene insulated cable and the preparation equipment thereof, when the cable is in operation, firstly, a conductor core 1 and an isolation layer 2 are clamped between a driven wheel 8 and a driving wheel 9, a motor 10 drives the driving wheel 9 to rotate, the driving wheel 9 rotates to rub the conductor core 1, the conductor core 1 is conveyed to a first extrusion head 11 and a second extrusion head 12, a polypropylene insulating material is thermally fused by an extruder and then is input into the first extrusion head 11 and the second extrusion head 12, the conductor core 1 and the isolation layer 2 are coated on the outer wall of the isolation layer 2 through the first extrusion head 11, an outer insulation layer 4 is coated on the outer wall of the inner insulation layer 3 when the conductor core 1 and the isolation layer 2 pass through the second extrusion head 12, a worm 13 is driven by the driving wheel 9 to rotate while the driving wheel 2, the worm 13 and a worm wheel 15 are meshed to drive a transmission shaft 14 to rotate, the transmission shaft 14 drives a second gear 33 to drive a molding mechanism to operate through a first gear 33, the outer wall of the inner insulation layer 3 is subjected to be molded in a wave-shaped mode, the inner insulation layer 3 is cooled and solidified by a cooling sleeve 16, the inner insulation layer 3 can be fused with the outer wall of the inner insulation layer 4, the inner insulation layer 4 is prevented from being fused with the inner insulation layer 4, the inner insulation layer 5 and the outer insulation layer 5 is not fused with the inner insulation layer 4, and the inner insulation layer 5 is in a low-insulation wire insulation layer 5, and the insulation wire is not fused with the inner insulation layer 5, and the insulation wire is formed on the inner insulation layer 5, and the insulation wire is in low insulation layer is in insulation layer, and the insulation wire insulation layer is not fused with the insulation layer, and the insulation wire insulation layer is in the insulation layer insulation wire insulation layer and the insulation wire is insulated; when the insulation property and the electromagnetic isolation property of the conductor core 1 are reduced by the isolation layer 2, the inner insulation layer 3 and the outer insulation layer 4, larger induction current is generated at the position of the armor layer 5 corresponding to the insulation failure, so that the corresponding local heating value of the armor layer 5 is increased, and the fusible metal wire is fused at the moment; the armor layer 5 is enabled to generate a leak at the insulation breakage position, the electromagnetic field generated by the conductor core 1 is released to the outside through the leak, and finally, a worker who patrols the wire can receive the electromagnetic signal through the signal receiver, so that the position of the cable insulation breakage failure is approximately determined.
The main functions realized by the invention are as follows:
1. Wave shaping molding can be performed on the insulating layer of the cable with high efficiency;
2. the extending effect of the insulating layer is increased, the cable is convenient to bend, and the reduction of the insulating effect caused by cracks of the insulating layer is reduced;
3. By braiding fusible metal wires in the armor, the position of cable insulation breakage failure can be conveniently determined.
The 6-35kV polypropylene insulated cable and the preparation equipment thereof are all common mechanical modes in the installation mode, the connection mode or the setting mode, and can be implemented as long as the beneficial effects can be achieved; the conductor core 1, the isolation layer 2, the inner insulation layer 3, the outer insulation layer 4, the armor layer 5, the sheath 6, the driven wheel 8, the driving wheel 9, the motor 10, the extrusion head I11, the extrusion head II 12, the worm 13, the transmission shaft 14, the worm wheel 15, the gear I32, the gear II 33, the cooling jacket 16, the gear ring 19, the bearing 20, the spring plate 23, the reciprocating screw rod 24, the slide block I25, the slide block II 26 and the long hook plate 29 of the 6-35kV polypropylene insulated cable and the preparation equipment thereof are purchased in the market, and the technical personnel in the industry only need to install and operate according to the attached use instructions without the creative labor of the technical personnel in the field.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (8)
1. A6-35 kV polypropylene insulated cable comprises a conductor core (1) and an isolation layer (2), wherein the conductor core (1) is provided with a plurality of conductive cores, and the isolation layer (2) is arranged outside the conductor core (1); the novel high-voltage cable is characterized by further comprising an inner insulating layer (3), an outer insulating layer (4), an armor layer (5) and a sheath (6), wherein the inner insulating layer (3) is arranged on the outer layer of the isolation layer (2), the outer insulating layer (4) is arranged on the outer layer of the inner insulating layer (3), the contact surface of the inner insulating layer (3) and the outer insulating layer (4) is in a wave shape, the inner wall of the inner insulating layer (3) is in a regular cylinder shape, the outer wall of the outer insulating layer (4) is in a regular cylinder shape, the armor layer (5) is arranged on the outer layer of the outer insulating layer (4), the armor layer (5) is formed by winding metal wires, and the sheath (6) is arranged on the outer layer of the armor layer (5); the transverse section of the contact surface of the inner insulating layer (3) and the outer insulating layer (4) is petal-shaped, and the petal-shaped section is arranged along the longitudinal direction of the inner insulating layer (3) and the outer insulating layer (4) along a spiral line.
2. A 6-35kV polypropylene insulated cable according to claim 1, characterized in that a plurality of fusible wires are braided side by side in the wires in the armouring layer (5).
3. The preparation equipment of a 6-35kV polypropylene insulated cable according to any one of claims 1 to 2, which comprises a frame (7), a driven wheel (8), a driving wheel (9), a motor (10), a first extrusion head (11), a second extrusion head (12), a worm (13), a transmission shaft (14), a worm wheel (15), a first gear (32), a second gear (33) and a molding mechanism, wherein the driven wheel (8) is rotatably arranged on the frame (7), the driving wheel (9) is rotatably arranged on the frame (7) through a rotating shaft, the driving wheel (9) is positioned above the driven wheel (8), the driven wheel (8) and the driving wheel (9) clamp and convey a conductor core (1) and an isolation layer (2), the motor (10) is arranged on the frame (7), an output shaft of the motor (10) is in transmission connection with the rotating shaft of the driving wheel (9), the extruder of polypropylene insulation material is provided with the first extrusion head (11), the first extrusion head (11) is provided with a first extrusion head molding mechanism, the first extrusion head (11) is provided with a wave-shaped mechanism for the outer wall of an inner insulation layer (3), the second extrusion head (11) is connected with the second extrusion head (12) to form an insulation layer (4), the rotating shaft of the driving wheel (9) is concentrically provided with a worm (13), a transmission shaft (14) is rotatably mounted on the frame (7), the rear end of the transmission shaft (14) is concentrically provided with a worm wheel (15), the worm wheel (15) is meshed with the worm (13), the front end of the transmission shaft (14) is concentrically provided with a first gear (32), the first gear (32) is meshed with a second gear (33), the second gear (33) is rotatably mounted on a shell of the molding mechanism, and the second gear (33) drives the molding mechanism to operate.
4. A device for the production of a 6-35kV polypropylene insulated cable according to claim 3, further comprising a cooling jacket (16), the cooling jacket (16) being arranged between the conductor core (1) and the extrusion head two (12), the cooling jacket (16) cooling and solidifying the inner insulation layer (3).
5. A device for preparing a 6-35kV polypropylene insulated cable according to claim 3, wherein the molding mechanism comprises a housing, a molding ring (17), a molding protrusion (18), a gear ring (19) and a bearing (20), the housing is arranged between the extrusion nozzle one of the extrusion head one (11) and the cooling jacket (16), a plurality of molding protrusions (18) are uniformly arranged on the circumference of the inner wall of the molding ring (17), the molding protrusion (18) is hemispherical, the gear ring (19) is arranged on the outer wall of the molding ring (17), the gear ring (19) is meshed with the gear two (33), the molding ring (17) is rotatably arranged in the housing through the bearing (20), the inner diameter of the molding ring (17) is identical to the inner diameter of the extrusion nozzle one of the extrusion head one (11), and the molding ring (17) is concentrically aligned with the extrusion nozzle one of the extrusion head one (11).
6. A preparation device for a 6-35kV polypropylene insulated cable according to claim 3, wherein the molding mechanism comprises a housing, a first slip ring (21), a second slip ring (22), a spring plate (23), a reciprocating screw (24), a first sliding block (25) and a second sliding block (26), the first slip ring (21) and the second slip ring (22) are concentrically aligned with the first extrusion nozzle of the first extrusion head (11), the first slip ring (21) is positioned at the rear side of the interior of the housing, the second slip ring (22) is movably arranged at the front side of the interior of the housing, a plurality of spring plates (23) are arranged between the first slip ring (21) and the second slip ring (22), the spring plates (23) can be bent inwards, an elastic film is arranged at the inner side of the spring plates (23), the reciprocating screw (24) is rotatably mounted in the interior of the housing, the front end of the reciprocating screw (24) is concentrically connected with the second sliding block (33), the first sliding block (25) is rotatably mounted at the rear end of the reciprocating screw (24) without a guide groove, the first sliding block (25) is connected with the first slip ring (21), the second sliding block (26) is rotatably mounted on the reciprocating screw (24) and is rotatably mounted on the guide groove (24) and is connected with the reciprocating screw (24).
7. The preparation device of a 6-35kV polypropylene insulated cable as claimed in claim 6, further comprising a front sealing sleeve (27) and a rear sealing sleeve (28), wherein the rear end of the front sealing sleeve (27) is concentrically connected with the front end of the second slip ring (22), the front end of the front sealing sleeve (27) is slidably inserted into the first extrusion nozzle of the first extrusion head (11), the outer wall of the front sealing sleeve (27) is slidably contacted with the inner wall of the first extrusion nozzle of the first extrusion head (11), the front end of the rear sealing sleeve (28) is concentrically connected with the rear end of the first slip ring (21), the front end of the rear sealing sleeve (28) is slidably inserted into the cooling sleeve (16), and the outer wall of the rear sealing sleeve (28) is slidably contacted with the inner wall of the cooling sleeve (16).
8. The preparation device of a 6-35kV polypropylene insulated cable as claimed in claim 6, further comprising a long hook plate (29), a hook seat (30) and a turnover plate (31), wherein the front end and the rear end of the guide groove of the reciprocating screw (24) are respectively provided with a straight guide groove parallel to the reciprocating screw (24), the first slider (25) is in transmission connection with the guide groove of the reciprocating screw (24), the front end of the long hook plate (29) is connected with the second slider (26), the rear end of the long hook plate (29) is provided with a hook facing the reciprocating screw (24), the hook seat (30) is elastically rotatably mounted on the first slider (25), the front end of the hook seat (30) is provided with a hanging plate, the hanging plate is matched with the hook of the long hook plate (29), the elasticity enables the hook seat (30) to reset to align the hanging plate with the hook, the first slider (25) stops the front end of the hook seat (30) when the hanging plate is aligned with the hook, the turnover plate (31) faces one end of the reciprocating screw (24) to the second slider (26), the rear end of the hook seat (30) is rotatably connected with the hook seat (31), and the turnover plate (31) is arranged on the side wall of the turnover plate (30) when the hook seat (31) is rotatably stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410322871.9A CN117954152B (en) | 2024-03-21 | 2024-03-21 | 6-35KV polypropylene insulated cable and preparation equipment thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410322871.9A CN117954152B (en) | 2024-03-21 | 2024-03-21 | 6-35KV polypropylene insulated cable and preparation equipment thereof |
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| CN117954152A CN117954152A (en) | 2024-04-30 |
| CN117954152B true CN117954152B (en) | 2024-06-11 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0550622U (en) * | 1991-10-15 | 1993-07-02 | タツタ電線株式会社 | Radiation resistant / flexible cable |
| CN203456153U (en) * | 2013-09-30 | 2014-02-26 | 阳光旭昇电缆有限公司 | 6 - 35kV fire-resistant cross-linked polyethylene insulated power cable |
| CN111029019A (en) * | 2019-12-10 | 2020-04-17 | 安徽瑞之星电缆集团有限公司 | Waterproof cable |
| CN114914038A (en) * | 2022-07-18 | 2022-08-16 | 优易电缆(张家港)有限公司 | Double-layer co-extrusion mold and method for cable and cable production equipment |
| CN217822154U (en) * | 2022-06-14 | 2022-11-15 | 金华市正通线缆有限公司 | High-strength insulated cable |
| CN219202789U (en) * | 2022-12-01 | 2023-06-16 | 江阴市源达电工材料有限公司 | Aluminum conductor silica gel insulation automobile shielding cable |
-
2024
- 2024-03-21 CN CN202410322871.9A patent/CN117954152B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0550622U (en) * | 1991-10-15 | 1993-07-02 | タツタ電線株式会社 | Radiation resistant / flexible cable |
| CN203456153U (en) * | 2013-09-30 | 2014-02-26 | 阳光旭昇电缆有限公司 | 6 - 35kV fire-resistant cross-linked polyethylene insulated power cable |
| CN111029019A (en) * | 2019-12-10 | 2020-04-17 | 安徽瑞之星电缆集团有限公司 | Waterproof cable |
| CN217822154U (en) * | 2022-06-14 | 2022-11-15 | 金华市正通线缆有限公司 | High-strength insulated cable |
| CN114914038A (en) * | 2022-07-18 | 2022-08-16 | 优易电缆(张家港)有限公司 | Double-layer co-extrusion mold and method for cable and cable production equipment |
| CN219202789U (en) * | 2022-12-01 | 2023-06-16 | 江阴市源达电工材料有限公司 | Aluminum conductor silica gel insulation automobile shielding cable |
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|---|---|
| CN117954152A (en) | 2024-04-30 |
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