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CN-122025256-A - Crosslinked polyethylene insulated power cable with water blocking structure

CN122025256ACN 122025256 ACN122025256 ACN 122025256ACN-122025256-A

Abstract

The invention discloses a crosslinked polyethylene insulated power cable with a water-blocking structure, which relates to the technical field of cables, wherein a plurality of partition grooves are arranged at the outer side of a water-blocking layer at equal intervals, four adjacent partition grooves form a group, a water-guiding sponge cushion is placed in each partition groove, an inner annular groove and an outer annular groove are sequentially formed at two ends of each partition groove, an annular cloth bag is sleeved in each inner annular groove, water-absorbing resin particles are filled in each annular cloth bag, and an annular water-blocking strip is sleeved in each outer annular groove.

Inventors

  • LI QIANQIAN
  • Cao Yingshuang
  • WANG GENHU

Assignees

  • 河北宇琼线缆有限公司

Dates

Publication Date
20260512
Application Date
20260402

Claims (10)

  1. 1. The crosslinked polyethylene insulated power cable with the water blocking structure comprises conductors (1), and is characterized in that the conductors (1) are provided with four, an insulating layer (2) is wrapped on the outer side of each conductor (1), a water blocking bending-resistant component (3) is arranged on the outer side of each insulating layer (2), and each water blocking bending-resistant component (3) comprises supporting ribs (301); the center outside the four insulating layers (2) is provided with supporting ribs (301), a plurality of separation frame pipes (302) are sleeved at equal intervals outside the supporting ribs (301), four separation arc frames (303) are uniformly arranged outside the separation frame pipes (302), and the four insulating layers (2) are respectively positioned in gaps between two adjacent separation arc frames (303); An inner sheath (309) is sleeved on the outer side of the separation arc frame (303), a gap in the inner sheath (309) is filled with a protective sponge pad (310), a water blocking belt (311) is wound on the outer side of the inner sheath (309), a shielding copper belt (312) is wound on the outer side of the water blocking belt (311), and a water blocking layer (313) is wrapped on the outer side of the shielding copper belt (312); The waterproof layer (313) outside equidistant a plurality of subregions grooves (314) that are provided with, four are adjacent subregions groove (314) are constituteed a set of, diversion foam-rubber cushion (316) have been placed to subregion groove (314) inside, every group annular groove (319) and outer loop groove (320) have been seted up in proper order at subregion groove (314) both ends, annular sack (321) have been cup jointed to interior loop groove (319) inside, annular sack (321) intussuseption is filled with water absorbent resin granule, annular sealing strip (323) have been cup jointed to the inside of outer loop groove (320).
  2. 2. A crosslinked polyethylene insulated power cable with water blocking structure according to claim 1, wherein two adjacent separator tubes (302) are connected by a plurality of connecting steel bars (304), and a separator tube (305) is sleeved outside the connecting steel bars (304) in the middle of two adjacent separator tubes (302).
  3. 3. The crosslinked polyethylene insulated power cable with the water blocking structure according to claim 1, wherein a heat-conducting silica gel strip (306) penetrates through the inside of the separation arc frame (303) at the same axial position, a filling duct (307) is formed in the inside of the heat-conducting silica gel strip (306), and a bending-resistant spring (308) penetrates through the inside of the filling duct (307).
  4. 4. The crosslinked polyethylene insulated power cable with the water blocking structure according to claim 1, wherein four adjacent partition grooves (314) are separated by partition strips (315), a movable port (317) is arranged between two adjacent partition strips (315), four adjacent water diversion sponge pads (316) form a group, the outer sides of each group of water diversion sponge pads (316) are sleeved and fixed through a plurality of rubber band rings (318), and the rubber band rings (318) are embedded in the movable port (317).
  5. 5. The crosslinked polyethylene insulated power cable with the water blocking structure according to claim 4, wherein one end of the annular cloth bag (321) is connected with a plurality of water absorbing cotton ropes (322), the water absorbing cotton ropes (322) are embedded into one end of an adjacent water diversion sponge cushion (316), one end of the annular water blocking strip (323) is connected with a plurality of water diversion cotton ropes (324), and the top ends of the water diversion cotton ropes (324) are embedded into the adjacent annular cloth bag (321).
  6. 6. The crosslinked polyethylene insulated power cable with water blocking structure according to claim 5, wherein the outer side of the water blocking layer (313) is wrapped with an outer sheath (325), and a gap is reserved between the outer sheath (325) and the annular water stop strip (323).
  7. 7. The crosslinked polyethylene insulated power cable with water blocking structure according to claim 6, wherein a joint protection assembly (4) is provided outside the outer sheath (325), the joint protection assembly (4) comprising a heat shrink sheath (401); The outer side of the outer sheath (325) is provided with a heat-shrinkable sheath (401), two inner protecting shells (402) are fixed on the outer side of the heat-shrinkable sheath (401), sealing rings (406) are fixed at two ends of the inner protecting shells (402) and positioned on the outer side of the outer sheath (325), and sealing skirt edges (407) are arranged at two ends of the outer side of the inner protecting shells (402); two outer shells (408) are fixed on the outer side of the inner shell (402), skirt edge grooves (409) are formed in two ends of the inner part of the outer shell (408), and the sealing skirt edges (407) are embedded into the adjacent skirt edge grooves (409); The outer protective casing (408) both ends are connected with arc strip (413), are located with the arc strip (413) outside of one end and pass through fixed hoop (415) fixed connection, sealing washer (414) have been cup jointed in arc strip (413) inboard in outer sheath (325) outside.
  8. 8. The crosslinked polyethylene insulated power cable with the water blocking structure according to claim 7, wherein an embedded opening (403) is formed in the middle of the inner protective shell (402), a drying bag (404) is placed in the embedded opening (403), drying agents are filled in the drying bag (404), inner fixing lugs (405) are connected to two sides of the inner protective shell (402), and two adjacent inner fixing lugs (405) are fixedly connected through bolts.
  9. 9. The crosslinked polyethylene insulated power cable with the water blocking structure according to claim 7, wherein a sealing edge strip (410) is arranged at the butt joint of the outer protecting shells (408), a sealing edge groove (411) is arranged at the butt joint of the other outer protecting shells (408), the sealing edge strip (410) is embedded into the sealing edge groove (411), two sides of each outer protecting shell (408) are connected with outer fixing lugs (412), and two adjacent outer fixing lugs (412) are fixedly connected through bolts.
  10. 10. The crosslinked polyethylene insulated power cable with the water blocking structure according to claim 8, wherein a supporting box (416) is arranged on the outer side of the outer protective shell (408), the inner fixing lugs (405) are located inside the supporting box (416), threaded cylinders (417) are connected to the top and the bottom of the supporting box (416), supporting plates (418) are arranged on two sides of the bottom of the outer protective shell (408), supporting screws (419) are rotatably connected to two ends of the top of the supporting plates (418), the top of each supporting screw (419) is connected with the threaded cylinders (417) located at the bottom through screw holes, and shock pads (420) are adhered to the bottom of the supporting plates (418).

Description

Crosslinked polyethylene insulated power cable with water blocking structure Technical Field The invention relates to the technical field of cables, in particular to a crosslinked polyethylene insulated power cable with a water blocking structure. Background The crosslinked polyethylene insulated power cable is a power cable which adopts crosslinked polyethylene (XLPE) as an insulating layer, is mainly applied to a power distribution network or industrial device fixed laying scene with the power frequency rated voltage of 0.6/1kV or below, covers the environments such as overhead, indoor, tunnel, cable pit and the like, and can be directly buried by armor and bear mechanical external force; in the Chinese patent with the name of 'a water-blocking and buffering power cable protection structure', the patent is characterized in that a staggered and matched wrapping layer and a sleeve layer are sequentially arranged outside a wire core conductor, a water-blocking pad is arranged at the periphery of the wrapping layer and is partially embedded in the sleeve layer close to the outer side, so that the water resistance of a power cable is effectively improved, the wrapping property of the wire core conductor is not lost, and meanwhile, the water-blocking pad is matched with a buffer sleeve which is circumferentially arranged at intervals on the sleeve layer to protect the bending position of the power cable; This patent can prevent that water from penetrating to the inside infiltration of cable through setting up the water-blocking pad, guarantee the radial direction's of cable performance of blocking water, but the cable of this patent is blocked water and is filled up unable to be prevented along cable axial infiltration, when water is along cable axial infiltration, the electrical insulation of cable can be influenced to the water of infiltration, can cause the cable short circuit when serious, influence the normal use of cable, consequently for the normal use of guarantee cable, not only guarantee the radial of cable and block water still, and the axial of cable is blocked water, and the bending resistance performance of current cable is relatively poor, after the cable is buckled, be difficult for recovering the original form. Disclosure of Invention The invention provides a crosslinked polyethylene insulated power cable with a water blocking structure, which can effectively solve the problems that in the prior art, a cable water blocking pad cannot prevent water from penetrating along the axial direction of the cable, when water penetrates along the axial direction of the cable, the penetrated water can affect the electrical insulation of the cable, and seriously cause a cable short circuit to affect the normal use of the cable, so that the radial water blocking of the cable is ensured, the axial water blocking of the cable is also realized, the bending resistance of the existing cable is poor, and the cable is not easy to recover after bending. The cross-linked polyethylene insulated power cable with the water blocking structure comprises four conductors, wherein insulating layers are wrapped on the outer sides of the conductors, water blocking bending-resistant components are arranged on the outer sides of the insulating layers, and the water blocking bending-resistant components comprise supporting ribs; The center of the outer side of each insulating layer is provided with a supporting rib, the outer sides of the supporting ribs are sleeved with a plurality of separation frame pipes at equal intervals, four separation arc frames are uniformly arranged on the outer sides of the separation frame pipes, and the four insulating layers are respectively positioned in gaps between two adjacent separation arc frames; an inner sheath is sleeved on the outer side of the separation arc frame, a gap in the inner sheath is filled with a protective sponge pad, a water blocking belt is wound on the outer side of the inner sheath, a shielding copper belt is wound on the outer side of the water blocking belt, and a water blocking layer is wrapped on the outer side of the shielding copper belt; The waterproof layer outside equidistant a plurality of subregions grooves that are provided with, four are adjacent the subregion groove is constituteed a set of, the inside diversion foam-rubber cushion that has placed of subregion groove, every group annular groove and outer loop groove have been seted up in proper order at subregion groove both ends, annular sack has been cup jointed to interior loop groove inside, the inside water absorbent resin granule that has filled of annular sack, annular sealing strip has been cup jointed to outer loop inslot portion. According to the technical scheme, two adjacent separation frame pipes are connected through a plurality of connection steel bars, and the separation pipe is sleeved outside the connection steel bars in the middle of the two adjacent separation frame pipes. According to the