Insulating flame-retardant power cable

Abstract

The utility model discloses an insulating flame-retardant power cable, which comprises an inner sheath, compression-resistant rods, a reinforcing block, a filling layer, a cable core main body, a mounting sleeve, a heat dissipation assembly and a protection assembly, the inner wall of the inner sheath is annularly provided with a plurality of compression-resistant rods, one end of each compression-resistant rod is jointly connected with the reinforcing block, and the other end of each compression-resistant rod is connected with the heat dissipation assembly. A filling layer is arranged among the inner wall of the inner sheath, the compression-resistant rod and the reinforcing block, a cable core main body is arranged in the filling layer, an installation sleeve is installed on the outer wall of the cable core main body in an attached mode, a heat dissipation assembly is connected to the outer wall of the installation sleeve, a protection assembly is connected to the outer wall of the inner sheath, and the reinforcing block is of a square structure. The number of the compression-resistant rods is four, each compression-resistant rod is located on the four faces of the reinforcing block, and one end of each compression-resistant rod is connected with the inner sheath, the compression-resistant performance of the cable can be improved, the cable is not prone to fracture when being extruded by the outside, and meanwhile generated heat can be rapidly discharged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of power cable, especially the technical field of insulating flame-retardant power cable. BACKGROUND

[0002] Power cable is used for transmission and distribution of electric energy, power cable is often used in urban underground power grid, power station outgoing line, internal power supply of industrial and mining enterprises and underwater power transmission line across river and sea, in power line, the proportion of cable is gradually increasing, power cable is a cable product used for transmission and distribution of high-power electric energy in the main line of power system, including 1-500KV and various voltage grades, various insulation power cables.

[0003] With the development of social economy, the consumption of wire and cable increases rapidly, and the quality requirement of cable is also continuously improved, the cable used in each field has particularly high requirements on the flame-retardant and oxidation-resistant characteristics of the cable, and the existing power cable does not have good flame-retardant and insulation performance, resulting in poor service life of the cable.

[0004] To solve the problems in the background art, for example, the application number CN201320033904.5 discloses a flame-retardant power cable, which is composed of a conductor, an insulation layer, a tape layer and a sheath layer, the conductor is extruded and wrapped with the insulation layer to form two groups of cable cores, the two groups of cable cores are extruded and wrapped with the tape layer, and the tape layer is extruded and wrapped with the sheath layer, the utility model has the characteristics of oil resistance, acid and alkali resistance, and excellent flame-retardant and oxidation-resistant characteristics, but the structure still has the following defects:

[0005] Although the structure improves the flame-retardant effect of the cable through the tape layer and the sheath layer, the cable generates a lot of high temperature heat during use, and the heat cannot be completely blocked by the tape layer and the sheath layer, so the cable is still prone to spontaneous combustion.

[0006] To solve the problems in the above-mentioned technology, for example, the application number CN201420097477.1 discloses a flame-retardant power cable, which is composed of a polytetrafluoroethylene outer sheath, a tinned copper wire braided shielding layer and a cable core, the cable core is formed by extruding and wrapping four power line cores with the tinned copper wire braided shielding layer; the power line core is formed by extruding and wrapping three insulated cores with a polyvinyl chloride insulation layer; the insulated core is formed by extruding and wrapping two silver-plated copper wire twisted conductors and two aluminum alloy conductors with a silicone rubber insulation layer; the four power line cores are provided with a nano carbon fiber inner core in the middle; the gap in the cable core is provided with a flame-retardant ceramic powder filling layer, and the cable core is coated with a polytetrafluoroethylene outer sheath, the cable has the characteristics of light weight, good shielding performance, excellent anti-interference performance, stable structure, flame-retardant, fire-resistant, stretch-resistant and shear-resistant, but the structure still has the following defects:

[0007] 1. The cable lacks a compression-resistant structure, so that the cable is prone to breakage when subjected to external pressure, thereby shortening the service life of the cable;

[0008] 2. The cable lacks a heat dissipation structure, so that the cable cannot quickly discharge the heat generated during use, thereby affecting the use effect of the cable. SUMMARY

[0009] The utility model discloses a kind of insulating flame-retardant power cables, can increase the compression resistance of cable, so that cable is not prone to breakage when subjected to external pressure, simultaneously can quickly discharge the heat generated.

[0010] To achieve the above object, the utility model provides an insulating flame-retardant power cable, including inner sheath, compression rod, reinforcing block, filling layer, wire core main body, mounting sleeve, heat dissipation component, protection component, the inner wall of the inner sheath annularly is provided with several compression rods, the one end of each compression rod is connected with reinforcing block, the inner wall of the inner sheath and compression rod, reinforcing block between are provided with filling layer, the filling layer is provided with wire core main body, the outer wall of the wire core main body is attached and mounted with mounting sleeve, the outer wall of the mounting sleeve is connected with heat dissipation component, the outer wall of the inner sheath is connected with protection component.

[0011] Preferably, the reinforcing block is square in structure, and the number of the compression rods is four, each of the compression rods is located at a face of the reinforcing block, one end of the compression rod is connected with the inner sheath, and the other end of the compression rod is connected with the reinforcing block.

[0012] Preferably, the heat dissipation component includes a heat-conducting sleeve, a plurality of heat-conducting fins and a plurality of heat-dissipating fins, the heat-conducting sleeve is sleeved on the outer wall of the mounting sleeve, the heat-dissipating fins are embedded in the inner wall of the inner sheath, each of the heat-conducting fins is located between the heat-conducting sleeve and the heat-dissipating fins, one end of each of the heat-conducting fins is connected with the heat-conducting sleeve, and the other end of each of the heat-conducting fins is connected with the heat-dissipating fins.

[0013] Preferably, the outer wall of the heat-conducting fin is attached and mounted with a flame-retardant layer.

[0014] Preferably, the inner sheath is internally annularly provided with a plurality of exhaust ports, each of the exhaust ports is communicated with the heat-dissipating fins.

[0015] Preferably, the protection component includes a waterproof layer, an insulating layer and an outer sheath, the outer wall of the inner sheath is attached and mounted with the waterproof layer, the outer wall of the waterproof layer is attached and mounted with the insulating layer, and the outer wall of the insulating layer is mounted with the outer sheath.

[0016] Preferably, a plurality of elastic rubber columns are annularly arranged between the insulation layer and the outer sheath.

[0017] The utility model discloses the beneficial effect:

[0018] 1. The utility model discloses a compression -resistant rod, reinforcing block, elastic rubber column's cooperation uses down, can increase the compression resistance of cable, when cable body is extruded by outside, and elastic rubber column is compressed under extrusion force, and then the effective support of inner sheath is carried out under the mutual support of compression -resistant rod and reinforcing block, and then the effective buffering of another part's extrusion force is carried out, thereby the effect of compression resistance is played, and then the cable body is protected, avoids the cable body and leads to cable fracture after extrusion, improves the service life of cable body, solves the problem that the cable is extruded by outside, and leads to the easy fracture of cable,

[0019] 2. The utility model discloses a heat radiation assembly is set up, can export the heat that generates fast, when the high temperature heat is produced in the use process of wire core body, the heat can be transferred to the heat dissipation fin on the heat conduction cover, and then the heat is transferred to the heat dissipation fin on the heat dissipation fin and is handled with heat dissipation, and a plurality of exhaust outlets are arranged in the inside of inner sheath, so that the heat that the heat dissipation fin radiates can export from the exhaust outlet, thereby reaching the effect that exports fast, and the heat dissipation performance of cable body is improved, the temperature balance of wire core body is kept, the phenomenon that the high temperature that wire core body works produces can not be exported fast and causes damage to cable body is avoided, and the problem that the high temperature heat is produced when the cable is used is not exported fast is solved. ACCURACY

[0020] Figure 1 It is the front view of the utility model kind of insulation flame -retardant power cable;

[0021] Figure 2 It is the heat radiation assembly schematic view of the utility model kind of insulation flame -retardant power cable;

[0022] Figure 3 It is the exhaust outlet schematic view of the utility model kind of insulation flame -retardant power cable;

[0023] Figure 4 It is the utility model kind of insulation flame -retardant power cable's perspective view;

[0024] In the drawing: 1 - inner sheath, 2 - compression -resistant rod, 3 - reinforcing block, 4 - filling layer, 5 - wire core body, 6 - installation cover, 7 - heat radiation assembly, 71 - heat conduction cover, 72 - heat dissipation fin, 73 - heat dissipation fin, 733 - flame -retardant layer, 8 - protection assembly, 81 - waterproof layer, 82 - insulation layer, 83 - outer sheath, 9 - exhaust outlet, 10 - elastic rubber column. Detailed Implementation

[0025] See Figures 1 to 4 This utility model discloses an insulated flame-retardant power cable, comprising an inner sheath 1, pressure-resistant rods 2, reinforcing blocks 3, a filling layer 4, a conductor body 5, an mounting sleeve 6, a heat dissipation assembly 7, and a protective assembly 8. The inner sheath 1 has a plurality of pressure-resistant rods 2 arranged in a ring on its inner wall, and one end of each pressure-resistant rod 2 is connected to a reinforcing block 3. A filling layer 4 is provided between the inner wall of the inner sheath 1 and the pressure-resistant rods 2 and reinforcing blocks 3. A conductor body 5 is disposed within the filling layer 4. An mounting sleeve 6 is fitted onto the outer wall of the conductor body 5. A heat dissipation assembly 7 is connected to the outer wall of the mounting sleeve 6. The protective assembly 8 is connected to the outer wall of the inner sheath 1.

[0026] See Figure 1 This utility model discloses an insulated flame-retardant power cable. The reinforcing block 3 has a square structure, and there are four pressure-resistant rods 2, each located on one of the four sides of the reinforcing block 3. One end of the pressure-resistant rod 2 is connected to the inner sheath 1, and the other end is connected to the reinforcing block 3. By setting the pressure-resistant rods 2 and the reinforcing block 3, the inner sheath 1 can be effectively supported, thereby effectively buffering a portion of the compressive force, thus achieving a pressure-resistant effect and protecting the cable body from breakage due to compression.

[0027] See Figure 2 This utility model discloses an insulated flame-retardant power cable. The heat dissipation assembly 7 includes a heat-conducting sleeve 71, a heat sink 72, and several heat-conducting plates 73. The heat-conducting sleeve 71 is fitted onto the outer wall of the mounting sleeve 6, and the heat sink 72 is embedded in the inner wall of the inner sheath 1. Each heat-conducting plate 73 is located between the heat-conducting sleeve 71 and the heat sink 72. One end of each heat-conducting plate 73 is connected to the heat-conducting sleeve 71, and the other end of each heat-conducting plate 73 is connected to the heat sink 72. A flame-retardant layer 733 is attached to the outer wall of the heat-conducting plate 73. Heat can be transferred to the heat-conducting plate 73 through the heat-conducting sleeve 71, and then the heat is transferred to the heat sink 72 through the heat-conducting plate 73 for heat dissipation. This avoids the phenomenon that the high temperature generated by the core body 5 during operation cannot be quickly dissipated and will damage the cable body.

[0028] See Figure 3 This utility model discloses an insulated flame-retardant power cable. The inner sheath 1 has a plurality of vents 9 arranged in a ring inside. Each vent 9 is connected to a heat sink 72. By setting the vents 9, the heat emitted by the heat sink 72 can be discharged from the vents 9, thereby achieving the purpose of rapid discharge.

[0029] See Figure 1 and Figure 4This utility model discloses an insulated flame-retardant power cable. The protective component 8 includes a waterproof layer 81, an insulation layer 82, and an outer sheath 83. The waterproof layer 81 is fitted onto the outer wall of the inner sheath 1, the insulation layer 82 is fitted onto the outer wall of the waterproof layer 81, and the outer sheath 83 is installed on the outer wall of the insulation layer 82. A plurality of elastic rubber pillars 10 are arranged in a ring between the insulation layer 82 and the outer sheath 83. The waterproof layer 81 is made of acrylic material, which can prevent water from entering the core body 5, thereby achieving a waterproof effect. The insulation layer 82 is made of PVC polyethylene material, which can improve the insulation performance of the cable body. The elastic rubber pillars 10 will be compressed under pressure, and at the same time, some of the pressure will be released and buffered, thereby achieving a protective effect.

[0030] The working process of this utility model:

[0031] In the operation of this utility model, when the cable body is subjected to external pressure, the elastic rubber column 10 is compressed by the extrusion force, and at the same time, part of the extrusion force is released and buffered. Then, under the mutual support of the pressure-resistant rod 2 and the reinforcing block 3, the inner sheath 1 can be effectively supported, thereby effectively buffering another part of the extrusion force, thus achieving the effect of pressure resistance, protecting the cable body, preventing the cable body from breaking due to compression, and improving the service life of the cable body.

[0032] When the conductor body 5 generates high temperature heat during use, the heat-conducting sleeve 71 can transfer the heat to the heat-conducting plate 73, and then the heat is transferred to the heat sink 72 for heat dissipation through the heat-conducting plate 73. At the same time, several exhaust ports 9 are provided inside the inner sheath 1, so that the heat emitted by the heat sink 72 can be discharged from the exhaust ports 9, thereby achieving a rapid heat dissipation effect, thereby improving the heat dissipation performance of the cable body, maintaining the temperature balance inside and outside the cable body, and avoiding the phenomenon that the high temperature generated by the conductor body 5 during operation cannot be discharged quickly and will damage the cable body.

[0033] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. An insulated, flame-retardant power cable, characterized by: The utility model relates to a kind of cable, including inner sheath (1), compression resistance pole (2), reinforcing block (3), filling layer (4), wire core main body (5), mounting sleeve (6), heat dissipation component (7), protective component (8), the inner wall annular of the inner sheath (1) is provided with several compression resistance poles (2), the one end of each the compression resistance pole (2) is connected with reinforcing block (3) in common, the inner wall of the inner sheath (1) is provided with filling layer (4) between compression resistance pole (2), reinforcing block (3), filling layer (4) is provided with wire core main body (5) in, the outer wall of wire core main body (5) is attached with mounting sleeve (6), the outer wall of mounting sleeve (6) is connected with heat dissipation component (7), the outer wall of the inner sheath (1) is connected with protective component (8).

2. An insulated, flame-retardant power cable according to claim 1, characterised in that: The reinforcing block (3) is square structure, the number of the compression resistance pole (2) is four, each the compression resistance pole (2) is located the four faces of reinforcing block (3), one end of the compression resistance pole (2) is connected with the inner sheath (1), the other end of the compression resistance pole (2) is connected with reinforcing block (3).

3. An insulated, flame-retardant power cable according to claim 1, characterized in that: The heat dissipation component (7) includes heat conducting sleeve (71), fin (72), several heat conducting fins (73), the heat conducting sleeve (71) is sleeved in the outer wall of mounting sleeve (6), the fin (72) is embedded in the inner wall of inner sheath (1), each the heat conducting fin (73) is located between heat conducting sleeve (71) and fin (72), one end of each the heat conducting fin (73) is connected with heat conducting sleeve (71), the other end of each the heat conducting fin (73) is connected with fin (72).

4. An insulated, flame-retardant power cable according to claim 3, characterised in that: The outer wall of the heat conducting fin (73) is attached with flame-retardant layer (733).

5. An insulated, flame-retardant power cable according to claim 3, characterised in that: The inside of the inner sheath (1) is annularly provided with several exhaust ports (9), each exhaust port (9) is communicated with fin (72).

6. An insulated, flame-retardant power cable according to claim 1, characterized in that: The protective component (8) includes waterproof layer (81), insulating layer (82), outer sheath (83), the outer wall of the inner sheath (1) is attached with waterproof layer (81), the outer wall of waterproof layer (81) is attached with insulating layer (82), the outer wall of insulating layer (82) is installed outer sheath (83).

7. An insulated, flame-retardant power cable according to claim 6, characterised in that: Annularly provided between the insulating layer (82) and outer sheath (83) several elastic rubber columns (10).

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