Deflection-resistant waterproof low-voltage power cable
By designing an inner fixing ring and an outer support ring, and utilizing elastic support blocks and reset support strips to buffer external pressure, the problem of deflection of waterproof low-voltage cables under external pressure is solved, and the cable's flexural resistance is improved.
Patent Information
- Application Number
- CN202520593336.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-01
AI Technical Summary
Waterproof low-voltage power cables are prone to bending under external pressure, which can lead to core breakage.
It adopts an inner fixed ring and an outer support ring structure, and uses elastic support blocks and reset support strips to form a gap to buffer external pressure and avoid pressure acting directly on the inner core.
It improves the cable's flexural strength, reduces the impact of external pressure on the cable's interior, and prevents the inner core from breaking.
Smart Images
Figure CN223956344U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to waterproof low -voltage power cable technical field, especially in a kind of waterproof low -voltage power cable of bending resistance. BACKGROUND
[0002] Power cable is used to transmit and distribute electric energy cable, power cable is often used in urban underground power network, power station lead-out line, industrial and mining enterprise internal power supply and cross river and sea underwater transmission line, power cable is in the main line of power system to transmit and distribute high-power electric energy cable product, including 1-500kV and above various voltage grades, various insulation power cable, power cable can be divided into: high-voltage power cable and low-voltage cable cable according to line voltage, low-voltage cable cable can be divided into: fireproof low-voltage cable cable of refractory material, waterproof low-voltage cable cable of waterproof material and the like according to material performance.
[0003] However, in the prior art, the internal structure of waterproof low-voltage power cable is compact, when the outside is subjected to pressure, the cable inside will appear bending phenomenon because of external pressure, and the waterproof low-voltage power cable core will be broken because of bending. UTILITY MODEL CONTENTS
[0004] The technical problem to be solved by the utility model is that the internal structure of waterproof low-voltage power cable is compact, when the outside is subjected to pressure, the cable inside will appear bending phenomenon because of external pressure, and the waterproof low-voltage power cable core will be broken because of bending.
[0005] In order to solve the above technical problem, the technical scheme of the utility model is:
[0006] A kind of waterproof low -voltage power cable of bending resistance, including cable core, the outside of the cable core is wrapped with cable armoring shield layer, the outside of the cable armoring shield layer is wrapped with cable insulation outer skin, the inside of the cable insulation outer skin is fixed with multiple outer support rings linearly arranged along its length direction, the outer surface of the cable armoring shield layer is equipped with multiple inner fixed rings linearly arranged along its length direction, the inner fixed ring is located in the middle of outer support ring and the center of circle coincides with the center of circle of outer support ring, the outer surface of the inner fixed ring is equipped with sliding groove, the inside of the sliding groove is slidably connected with multiple elastic support blocks, the elastic support block is in contact with outer support ring.
[0007] Preferably, multiple elastic connecting rods are fixed between every two adjacent inner fixed rings, and the elastic connecting rods are distributed in a circular array around the center of circle of the inner fixed ring together with the elastic support blocks.
[0008] Preferably, a reset support strip is arranged between the end of every two adjacent elastic support blocks, and the reset support strip is distributed in a circular array around the center of circle of the inner fixed ring.
[0009] Preferably, the two ends of the reset support strip are inwardly fixed to the center of the inner fixed ring and are bent, and the end of the reset support strip is arc-shaped and adheres to the outer surface of the end of the elastic support block.
[0010] Preferably, the elastic support block comprises a support portion, the support portion is V-shaped and the middle portion is arc-shaped, the two ends of the support portion are fixed with sliding portions, the sliding portions are arc-shaped and the end of the sliding portion not fixed with the support portion adheres to the outer surface of the end of the support portion.
[0011] Compared with the prior art, the utility model has the following advantages:
[0012] The elastic support block is used for supporting and connecting the inner fixed ring and the outer support ring, and there is a gap between the inner fixed ring and the outer support ring, when the cable is pressed from outside, the outer support ring approaches the inner fixed ring due to the external pressure, at this time, the elastic support block and the reset support strip are extruded and deformed, at this time, the outer support ring is dislocated from the center of the inner fixed ring, and the pressure is not directly applied to the inner core of the cable, the waterproof low-voltage power cable is improved in the flexibility and the influence of the external pressure on the waterproof low-voltage power cable is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is the whole structure schematic diagram of the utility model;
[0014] Figure 2 It is the structure schematic diagram of the inner fixed ring and the outer support ring of the utility model;
[0015] Figure 3 It is the connection schematic diagram of the elastic support block and the reset support strip of the utility model;
[0016] Figure 4 It is the structure schematic diagram of the elastic support block of the utility model.
[0017] In the drawing: 1, cable inner core; 2, cable armoring shield layer; 3, cable insulation outer skin; 4, inner fixed ring; 5, outer support ring; 6, elastic connecting rod; 7, sliding groove; 8, elastic support block; 81, support portion; 82, sliding portion; 9, reset support strip. DETAILED DESCRIPTION
[0018] The specific embodiments of the utility model are further described below in combination with the drawings. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation on the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as there is no conflict.
[0019] For example, Figure 1 And Figure 2As shown in the figure, a kind of waterproof low-voltage power cable of bending resistance type includes cable core 1, cable core 1 is wrapped with cable armor shielding layer 2 on the outside, the outside of cable armor shielding layer 2 is wrapped with cable insulation sheath 3, the inside of cable insulation sheath 3 is fixed with multiple outer support rings 5 linearly arranged along the length direction thereof, the outer surface of cable armor shielding layer 2 is provided with multiple inner fixed rings 4 linearly arranged along the length direction thereof, inner fixed ring 4 is located in the middle of outer support ring 5 and the center of circle coincides with the center of circle of outer support ring 5, the outer surface of inner fixed ring 4 is provided with sliding groove 7, the inside of sliding groove 7 is slidably connected with multiple elastic supporting blocks 8, elastic supporting block 8 is in contact with outer support ring 5, elastic supporting block 8 is used to support contact outer support ring 5 and inner fixed ring 4, so that there is gap between outer support ring 5 and inner fixed ring 4, when waterproof low-voltage power cable is pressed from outside, pressure directly acts on outer support ring 5 and elastic supporting block 8, only part of pressure is transmitted to inner fixed ring 4, reduce the influence of waterproof low-voltage power cable external pressure on waterproof low-voltage power cable internal.
[0020] Every two adjacent inner fixed rings 4 are fixed with multiple elastic connecting rods 6, elastic connecting rod 6 and elastic supporting block 8 are distributed in circular array around the center of circle of inner fixed ring 4, adjacent inner fixed rings 4 are fixed by elastic connecting rod 6, to avoid inner fixed ring 4 from sliding on the outside of cable armor shielding layer 2 and from approaching each other, so as to cause collapse in the inside of waterproof low-voltage power cable.
[0021] As the preferred technical scheme of the embodiment, as shown in Figure 3 And Figure 4 Every two adjacent elastic supporting blocks 8 are provided with reset support strip 9 between end and end, reset support strip 9 is distributed in circular array around the center of circle of inner fixed ring 4, the two ends of reset support strip 9 are bent towards the center of circle of inner fixed ring 4, and the end of reset support strip 9 is arc-shaped and adheres to the outer surface of the end of elastic supporting block 8, reset support strip 9 is used to support the end of elastic supporting block 8, so that after elastic supporting block 8 is extruded and deformed, reset support strip 9 is also deformed, after the disappearance of external pressure, reset support strip 9 elastically restores and drives the end of elastic supporting block 8 to reset, to ensure that the position of elastic supporting block 8 will not deviate.
[0022] Elastic supporting block 8 includes support part 81, support part 81 is V-shaped and the middle part is arc-shaped, the two ends of support part 81 are fixed with sliding part 82, sliding part 82 is circularly arc-shaped and bent, and the end of sliding part 82 adheres to the end of support part 81, the circularly arc-shaped sliding part 82 will not cause abrasion to inner fixed ring 4 when adhering to inner fixed ring 4 to slide, and the sliding friction between sliding part 82 and inner fixed ring 4 is small, so that elastic supporting block 8 will not be stuck with inner fixed ring 4 when being extruded.
[0023] Working principle: when the waterproof low-voltage power cable is installed, the operator extrudes the waterproof low-voltage power cable, the external pressure acts on the cable insulation outer skin 3, the cable insulation outer skin 3 transmits the external pressure to the outer supporting ring 5, when the outer supporting ring 5 is subjected to the external pressure, the outer supporting ring 5 approaches the inner fixed ring 4 direction, because the outer supporting ring 5 and the inner fixed ring 4 are supported by the elastic supporting block 8, and the inner fixed ring 4, the outer supporting ring 5 and the elastic supporting block 8 are all in sliding contact and not fixed, when the outer supporting ring 5 approaches the inner fixed ring 4, the middle arc part of the supporting part 81 is extruded, the two ends of the supporting part 81 push the sliding part 82 to slide in the sliding groove 7 and adhere to the inner fixed ring 4, and the sliding part 82 extrudes the end of the reset support strip 9 when sliding, at this time, the two ends of the reset support strip 9 approach each other and the middle protrusion, in this process, the outer supporting ring 5 moves and the inner fixed ring 4 does not change position, the center of the outer supporting ring 5 and the center of the inner fixed ring 4 are dislocated, so that the external pressure acts on the cable insulation outer skin 3, the outer supporting ring 5 and the elastic supporting block 8, only a small part is transmitted to the inner fixed ring 4 and absorbed by the inner fixed ring 4, the cable inner core 1 inside the cable shielding layer 2 will not be bent due to external pressure, the bending resistance of the waterproof low-voltage power cable is improved, and the influence of external pressure on the waterproof low-voltage power cable is reduced.
[0024] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and still fall within the protection scope of the utility model.
Claims
1. A flexible, water-resistant, low-voltage power cable comprising a cable core (1), characterized in that: The outer side of the cable inner core (1) is wrapped with a cable armor shielding layer (2), the outer side of the cable armor shielding layer (2) is wrapped with a cable insulation outer skin (3), the inner side of the cable insulation outer skin (3) is fixed with a plurality of outer support rings (5) arranged linearly along the length direction, the outer surface of the cable armor shielding layer (2) is provided with a plurality of inner fixed rings (4) arranged linearly along the length direction, the inner fixed rings (4) are located in the middle of the outer support rings (5) and the centers of the inner fixed rings (4) coincide with the centers of the outer support rings (5), the outer surface of the inner fixed rings (4) is provided with sliding grooves (7), the inner side of the sliding grooves (7) is slidably connected with a plurality of elastic support blocks (8), and the elastic support blocks (8) are in contact with the outer support rings (5).
2. A flexible waterproof low-voltage power cable according to claim 1, characterized in that: A plurality of elastic connecting rods (6) are fixed between every two adjacent inner fixed rings (4), and the elastic connecting rods (6) and the elastic support blocks (8) are distributed in a circular array around the center of the inner fixed ring (4).
3. A flexible water resistant low voltage power cable according to claim 2, characterized in that: Reset support strips (9) are arranged between the ends of every two adjacent elastic support blocks (8), and the reset support strips (9) are distributed in a circular array around the center of the inner fixed ring (4).
4. A flexible water blocking low voltage power cable according to claim 3, characterized in that: The two ends of the reset support strip (9) are bent towards the center of the inner fixed ring (4), and the ends of the reset support strip (9) are arc-shaped and adhere to the outer surface of the ends of the elastic support block (8).
5. A flexible water resistant low voltage power cable according to claim 3, characterized in that: The elastic support block (8) comprises a support portion (81), the support portion (81) is V-shaped and the middle part is arc-shaped, the two ends of the support portion (81) are fixed with sliding portions (82), the sliding portions (82) are circularly bent, and the unfixed ends of the sliding portions (82) adhere to the outer surface of the ends of the support portion (81).