High-flame-retardant fireproof durable power cable

Abstract

The invention discloses a high-flame-retardant fireproof durable power cable which comprises a protection unit, two cable bodies and a plurality of support units, the two cable bodies are embedded into the protection unit from the two sides, the protection unit penetrates through each support unit, and each support unit comprises an upper support and a lower support. The power cable disclosed by the invention has good ultraviolet resistance, high flame retardance and oil sludge resistance, so that long-term stable operation of the cable is maintained. And effective temperature measurement and flame-retardant alarm can be realized. The protection unit wraps and protects the two cable bodies, so that the cable bodies are further protected, and tight installation between the protection unit and the cable bodies is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and more specifically to a highly flame-retardant, fire-resistant and durable power cable. Background Art

[0002] As an indispensable part of the power system, power cables play an important role in various fields. With the sustained and rapid growth of China's economy, the market demand for power cables continues to increase. Especially in the fields of new energy, smart grid, rail transportation, aerospace, marine engineering, etc., power cables have broad application prospects.

[0003] Existing power cables have poor flame retardant properties. In extreme cases such as fire, the fire will quickly spread along the cable, expanding the scope of the fire, increasing the difficulty of rescue and property losses. In some industrial environments, cables may be exposed to pollutants such as oil, mud and water. If the outer layer of the power cable is not resistant to oil and mud, the insulation performance of the cable will be reduced, and even cause faults such as short circuits. In addition, when exposed to outdoor environments for a long time, some power cables have poor UV resistance, which will cause the cable sheath to age, harden, and crack, thereby affecting the insulation performance and mechanical strength of the cable and shortening the service life of the cable. In addition, some power cables cannot monitor the operating temperature of the cable in real time, making it difficult to detect potential faults such as cable overheating in time, increasing the risk of cable failure. In emergency situations such as fire, the cable cannot send out an alarm signal in time, delaying the rescue opportunity. Summary of the invention

[0004] The present invention aims to overcome the defects of the prior art and provide a highly flame-retardant, fire-resistant and durable power cable.

[0005] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a cable, comprising a protection unit, two cable bodies and a plurality of bracket units, the two cable bodies being embedded in the protection unit from both sides, the protection unit passing through each bracket unit, and the bracket unit comprising an upper bracket and a lower bracket.

[0006] Further, the protection unit includes a thermally conductive seat and a covering unit covering the thermally conductive seat, the thermally conductive seat includes a seat body and two side thermally conductive seats fixedly connected to the seat body, the top end of the seat body has an upper groove portion, and the bottom end has a lower groove portion; the covering unit includes a covering seat, two upper covering units connected to the covering seat, and two lower covering units connected to the covering seat, the upper covering unit includes a first upper covering portion, a second upper covering portion, and a connecting covering portion connecting the first upper covering portion and the second upper covering portion, the cross-sections of the first upper covering portion, the second upper covering portion, the connecting covering portion, and the lower covering unit are all arc-shaped, and each cable body is located between an upper covering unit and a lower covering unit.

[0007] Further, both sides of the covering seat have an embedding groove and an insertion groove connected to the embedding groove, the covering seat also includes a side covering portion covering the side heat-conducting seat, the side covering portion extends into the embedding groove, the top of the covering seat has an upper mounting groove and an upper receiving groove connected to the upper mounting groove, the bottom of the covering seat has a lower mounting groove and a lower receiving groove connected to the lower mounting groove, the upper receiving groove extends into the upper groove portion, and the lower receiving groove extends into the lower groove portion; the cable body includes a protective cover and a heat conduction unit located in the protective cover, the protective cover includes a main body, a heat conduction unit connected to the main body, and a heat conduction unit located in the protective cover. A side protrusion, a connecting part connected to the main body, and an embedded part connected to the connecting part, the embedded part has a side covering groove, the embedded part is embedded in the embedded groove, and the side covering part is embedded in the side covering groove; the heat conduction unit includes a heat conduction seat, two first metal plates and two second metal plates, the two first metal plates have a cable core unit, the side covering groove is located in the two second metal plates, the cable core unit includes an outer sheath, an armor layer, an inner sheath and a wrapping layer from the outside to the inside, the wrapping layer has a plurality of cores, and the cores include an insulating layer and a conductor from the outside to the inside.

[0008] Furthermore, the seat body, the side heat-conducting seat, the upper groove portion and the lower groove portion all extend along the length direction of the cable body.

[0009] Furthermore, the upper bracket includes two clamping plates, a connecting plate connecting the two clamping plates, an upper mounting plate connected to the connecting plate and located in the upper mounting groove, and an upper plug plate connected to the upper mounting plate and located in the upper receiving groove, the clamping plate includes a first arc panel connected to the connecting plate, a second arc panel connected to the first arc panel, a third arc panel connected to the second arc panel, a fourth arc panel connected to the third arc panel, and a side panel connected to the fourth arc panel, the side panel has a limiting groove, the connecting covering portion is located in the second arc panel, and the side protrusion is located in the fourth arc panel; the lower bracket includes a frame body, a lower mounting plate connected to the frame body and located in the lower mounting groove, a lower An insert plate and two L-shaped plates connected to the frame body, the two sides of the frame body have limiting protrusions that cooperate with the limiting grooves, the frame body has two supporting grooves for supporting the lower covering unit; a temperature measuring optical fiber is installed in the upper accommodating groove; at least one of the multiple bracket units is a detection bracket unit, and a temperature sensor is installed on the lower insert plate at the lower bracket of the detection bracket unit, a connecting pipe is connected between the two second arc panels of the detection bracket unit, and the two second arc panels have connecting holes connected to the connecting pipe, and at the protection unit position corresponding to the detection bracket unit, the two connecting covering parts of the protection unit have through-hole parts connected to the connecting hole, and a smoke sensor extending into the connecting pipe is installed on the connecting pipe.

[0010] Furthermore, two temperature sensors are installed on the lower plug board at the lower bracket of the detection bracket unit.

[0011] Thereby, the temperature sensor can be better utilized for temperature measurement.

[0012] Furthermore, the bottom end of the upper insert plate has an arc-shaped groove, and the top end of the lower insert plate has an arc-shaped groove.

[0013] Therefore, the temperature measuring optical fiber can be better limited between the upper plug plate and the upper receiving groove.

[0014] Furthermore, the L-shaped plate has a plurality of strip-shaped through grooves.

[0015] Thereby facilitating the installation of the lower frame body and thus facilitating the installation of the entire cable.

[0016] Furthermore, the heat conduction seat, the two first metal plates and the two second metal plates all extend along the length direction of the cable body; and the cross-sections of the first metal plate and the second metal plate are both arc-shaped.

[0017] Therefore, the first metal plate and the second metal plate can achieve better shielding and heat conduction effects on the cable core unit.

[0018] Furthermore, the first upper covering portion has an upper recessed portion extending along the length direction of the cable body; and the lower covering unit has a lower recessed portion extending along the length direction of the cable body.

[0019] Therefore, when the cable body is installed at the protection unit, the upper covering unit and the lower covering unit can be opened better, so that it is convenient to install the cable body at the protection unit.

[0020] Furthermore, the armor layer is a steel wire armor layer, the conductor is a copper conductor, and the wrapping layer is a flame retardant wrapping layer.

[0021] Furthermore, the covering unit is formed by extrusion of PVC material; the protective cover is made of polyethylene material; and the heat-conducting seat and the heat-conducting unit are both made of copper-aluminum alloy.

[0022] Furthermore, the plurality of bracket units are distributed at equal intervals.

[0023] This allows for better support for the protection unit and the cable body.

[0024] Furthermore, there are multiple detection bracket units, and the multiple detection bracket units are distributed at equal intervals.

[0025] Therefore, the cable body can be detected at each distance.

[0026] Beneficial effects: 1. The power cable of the present application has excellent UV resistance, high flame retardancy, and oil sludge resistance, thereby maintaining long-term stable operation of the cable.

[0027] 2. In the power cable of the present application, the protection unit wraps and protects the two cable bodies, so that the cable bodies are further protected, and the protection unit and the cable bodies are tightly installed.

[0028] 3. The power cable of the present application can realize effective temperature measurement and flame retardant alarm, thereby notifying maintenance personnel to perform maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of separating the cable components from the first perspective; Figure 2 This is an enlarged view of area A; Figure 3 This is an enlarged view of area B; Figure 4 This is an enlarged view of area C; Figure 5 A second perspective schematic diagram of separating the cable components; Figure 6 This is an enlarged view of area D; Figure 7 This is an enlarged view of area E; Figure 8 This is a schematic diagram of the installation of the protection unit and two cable bodies; Fig. 9 This is an enlarged view of area F; Fig.10 This is a schematic diagram after installing the lower bracket; Fig.11 This is an enlarged view of area G; Fig.12 This is a schematic diagram after the bracket is installed; Fig.13 This is an enlarged view of the H area.

[0030] Description of reference numerals: protection unit 1; seat body 1.1; upper groove portion 1.1.1; lower groove portion 1.1.2; side heat conduction seat 1.2; covering seat 1.3; embedded groove 1.3.1; inserted groove 1.3.2; upper mounting groove 1.3.3; upper receiving groove 1.3.4; lower mounting groove 1.3.5; lower receiving groove 1.3.6; first upper covering portion 1.4; upper recessed portion 1.4.1; second upper covering portion 1.5; connecting covering portion 1.6; through hole portion 1.6.1; lower covering unit 1.7; lower recessed portion 1.7.1; side covering portion 1.8; cable body 2; main body portion 2.1; side protruding portion 2.2; connecting portion 2.3; embedded portion 2.4; side covering groove 2.4.1; heat conduction seat 2. 5; first metal plate 2.6; second metal plate 2.7; outer protective layer 2.8; armor layer 2.9; inner protective layer 2.10; sheathing layer 2.11; insulating layer 2.12; conductor 2.13; upper bracket 3; first arc panel 3.1; second arc panel 3.2; connecting hole 3.2.1; third arc panel 3.3; fourth arc panel 3.4; side panel 3.5; limiting groove 3.5.1; connecting plate 3.6; upper mounting plate 3.7; upper plug plate 3.8; lower bracket 4; frame 4.1; limiting protrusion 4.1.1; supporting groove 4.1.2; lower mounting plate 4.2; lower plug plate 4.3; L-shaped plate 4.4; strip through groove 4.4.1; temperature measuring optical fiber 5; temperature sensor 6; connecting pipe 7; smoke sensor 8. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] The present invention provides a highly flame-retardant, fire-resistant and durable power cable as shown in the figure, comprising a protection unit 1, two cable bodies 2 and a plurality of bracket units, the two cable bodies 2 are embedded in the protection unit 1 from both sides, the protection unit 1 passes through each bracket unit, and the bracket unit comprises an upper bracket 3 and a lower bracket 4. The protection unit 1 includes a heat-conducting seat and a covering unit covering the heat-conducting seat, the heat-conducting seat includes a seat body 1.1 and two side heat-conducting seats 1.2 fixedly connected to the seat body 1.1, the top end of the seat body 1.1 has an upper groove portion 1.1.1, and the bottom end has a lower groove portion 1.1.2; the covering unit includes a covering seat 1.3, two upper covering units connected to the covering seat 1.3, and two lower covering units 1.7 connected to the covering seat 1.3, the upper covering unit includes a first upper covering portion 1.4, a second upper covering portion 1.5, and a connecting covering portion 1.6 connecting the first upper covering portion 1.4 and the second upper covering portion 1.5, the cross-sections of the first upper covering portion 1.4, the second upper covering portion 1.5, the connecting covering portion 1.6 and the lower covering unit 1.7 are all arc-shaped, and each cable body 2 is located between an upper covering unit and a lower covering unit 1.7. Both sides of the covering seat 1.3 are provided with an embedding groove 1.3.1 and an insertion groove 1.3.2 connected to the embedding groove 1.3.1. The covering seat 1.3 also includes a side covering portion 1.8 covering the side heat-conducting seat 1.2, and the side covering portion 1.8 extends into the embedding groove 1.3.1. The top of the covering seat 1.3 is provided with an upper mounting groove 1.3.3 and an upper receiving groove 1.3.4 connected to the upper mounting groove 1.3.3. The bottom end of the covering seat 1.3 is provided with a lower mounting groove 1.3.5 and a lower receiving groove 1.3.6 connected to the lower mounting groove 1.3.5. The upper receiving groove 1.3.4 extends into the upper groove portion 1.1.1, and the lower receiving groove 1.3.6 extends into the lower groove portion 1.1.2. The cable body 2 includes a protective cover and a heat conduction unit located in the protective cover, and the protective cover includes a main body 2.1, and a heat conduction unit connected to the main body 2. 1, a side protruding portion 2.2 connected to the main body 2.1, a connecting portion 2.3 connected to the main body 2.1, and an embedded portion 2.4 connected to the connecting portion 2.3, the embedded portion 2.4 has a side covering portion groove 2.4.1, the embedded portion 2.4 is embedded in the embedded groove 1.3.1, and the side covering portion 1.8 is embedded in the side covering portion groove 2.4.1; the heat conduction unit comprises a heat conduction seat 2.5, two first metal plates 2.6 and two second metal plates 2.7, the two first metal plates 2.6 have a cable core unit, the side covering portion groove 2.4.1 is located in the two second metal plates 2.7, the cable core unit comprises an outer sheath 2.8, an armor layer 2.9, an inner sheath 2.10 and a wrapping layer 2.11 from the outside to the inside, the wrapping layer 2.11 has a plurality of cores, and the cores comprise an insulating layer 2.12 and a conductor 2.13 from the outside to the inside.

[0033] The upper bracket 3 includes two clamping plates, a connecting plate 3.6 connecting the two clamping plates, an upper mounting plate 3.7 connected to the connecting plate 3.6 and located in the upper mounting groove 1.3.3, and an upper plug plate 3.8 connected to the upper mounting plate 3.7 and located in the upper receiving groove 1.3.4. The clamping plate includes a first curved panel 3.1 connected to the connecting plate 3.6, a second curved panel 3.2 connected to the first curved panel 3.1, a third curved panel 3.3 connected to the second curved panel 3.2, and a third curved panel 3.4 connected to the first curved panel 3.5. The fourth curved panel 3.4 connected to the three curved panels 3.3 and the side panel 3.5 connected to the fourth curved panel 3.4, the side panel 3.5 has a limiting groove 3.5.1, the connection covering portion 1.6 is located in the second curved panel 3.2, and the side protrusion 2.2 is located in the fourth curved panel 3.4; the lower bracket 4 includes a frame body 4.1, a lower mounting plate 4.2 connected to the frame body 4.1 and located in the lower mounting groove 1.3.5, and a lower mounting plate 4.2 connected to the lower mounting plate 4.2 and located in The lower plug plate 4.3 in the lower accommodating groove 1.3.6 and the two L-shaped plates 4.4 connected to the frame body 4.1, the frame body 4.1 has limiting protrusions 4.1.1 on both sides that cooperate with the limiting grooves 3.5.1, and the frame body 4.1 has two supporting grooves 4.1.2 for supporting the lower covering unit 1.7; a temperature measuring optical fiber 5 is installed in the upper accommodating groove 1.3.4; at least one of the multiple bracket units is a detection bracket unit, and a temperature sensor 6 is installed on the lower plug plate 4.3 at the lower bracket 4 of the detection bracket unit, and a connecting pipe 7 is connected between the two second arc panels 3.2 of the detection bracket unit, and the two second arc panels 3.2 have connecting holes 3.2.1 connected to the connecting pipe 7, and at the position of the protection unit 1 corresponding to the detection bracket unit, the two connecting covering parts 1.6 of the protection unit 1 have through hole parts 1.6.1 connected to the connecting hole, and the connecting pipe 7 is installed with a smoke sensor 8 extending into the connecting pipe 7.

[0034] Two temperature sensors 6 are installed at the lower plug plate 4.3 at the lower bracket 4 of the detection bracket unit. The L-shaped plate 4.4 has a plurality of strip-shaped through grooves 4.4.1. The heat conduction seat 2.5, the two first metal plates 2.6 and the two second metal plates 2.7 all extend along the length direction of the cable body 2; the cross-sections of the first metal plate 2.6 and the second metal plate 2.7 are both arc-shaped. The first upper covering portion 1.4 has an upper recessed portion 1.4.1 extending along the length direction of the cable body 2; the lower covering unit 1.7 has a lower recessed portion 1.7.1 extending along the length direction of the cable body 2. The armor layer 2.9 is a steel wire armor layer, the conductor 2.13 is a copper conductor, and the wrapping layer 2.11 is a flame-retardant wrapping layer. The coating unit is extruded from PVC material; the protective cover is made of polyethylene material; the heat conduction seat and the heat conduction unit are both made of copper-aluminum alloy.

[0035] Working principle: The cable of the present application is installed as a group of two cable bodies. During installation, the two cable bodies can be embedded in the protection unit from both sides, and the protection unit can be supported by the lower bracket, and the upper bracket and the lower bracket can be installed together, so that the cable body, the protection unit and multiple bracket units are installed together. The cable body itself has good UV resistance, flame retardancy, and sludge resistance. In addition, the protection unit can wrap and protect the two cable bodies, so that the cable body is further protected, and the protection unit and the two cable bodies can be embedded and installed, so that the protection unit and the cable body can be installed more tightly. Since the heat conduction unit has two first metal plates wrapping the cable core unit, the shielding performance of the cable body can be increased, and the heat of the cable core unit can be conducted to the two second metal plates, and then transferred to the side heat conduction seat, so that it can be detected by the temperature measuring optical fiber, and detected by the temperature sensor at the detection bracket unit, so that the operating temperature of the two cable bodies can be detected. In addition, the upper bracket and the lower bracket of the bracket unit can be fixedly installed by cooperating with the limiting grooves and the limiting protrusions to further fix the protection unit and the two cable bodies. The strip groove of the L-shaped plate at the lower bracket can facilitate the installation of the lower bracket, and a smoke sensor is installed at the upper bracket of the detection bracket unit. When the cable body burns and produces smoke, the smoke can be transmitted along the space in the connecting covering part to the connecting pipe and be sensed by the smoke sensor.

[0036] Although the present invention has been illustrated and described with respect to the preferred embodiments, it will be appreciated by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. A highly flame-retardant, fire-resistant and durable power cable, characterized in that: It comprises a protection unit, two cable bodies and a plurality of bracket units. The two cable bodies are embedded in the protection unit from both sides. The protection unit passes through each bracket unit. The bracket unit comprises an upper bracket and a lower bracket.

2. A highly flame-retardant, fire-resistant and durable power cable according to claim 1, characterized in that: The protection unit includes a heat-conducting seat and a covering unit covering the heat-conducting seat, the heat-conducting seat includes a seat body and two side heat-conducting seats fixedly connected to the seat body, the top end of the seat body has an upper groove portion, and the bottom end has a lower groove portion; the covering unit includes a covering seat, two upper covering units connected to the covering seat, and two lower covering units connected to the covering seat, the upper covering unit includes a first upper covering portion, a second upper covering portion, and a connecting covering portion connecting the first upper covering portion and the second upper covering portion, the cross-sections of the first upper covering portion, the second upper covering portion, the connecting covering portion, and the lower covering unit are all arc-shaped, and each cable body is located between an upper covering unit and a lower covering unit.

3. A highly flame-retardant, fire-resistant and durable power cable according to claim 2, characterized in that: Both sides of the covering seat are provided with an embedding groove and an insertion groove connected with the embedding groove. The covering seat also includes a side covering portion covering the side heat-conducting seat, and the side covering portion extends into the embedding groove. The top end of the covering seat has an upper mounting groove and an upper receiving groove connected with the upper mounting groove. The bottom end of the covering seat has a lower mounting groove and a lower receiving groove connected with the lower mounting groove. The upper receiving groove extends into the upper groove portion, and the lower receiving groove extends into the lower groove portion. The cable body includes a protective cover and a heat conduction unit located in the protective cover. The protective cover includes a main body, a side convex portion connected with the main body, and a side convex portion connected with the main body. The heat conduction unit comprises a heat conduction seat, two first metal plates and two second metal plates, the two first metal plates have a cable core unit, the side covering part groove is located in the two second metal plates, the cable core unit comprises an outer sheath, an armor layer, an inner sheath and a wrapping layer from the outside to the inside, the wrapping layer has a plurality of cores, and the cores comprise an insulating layer and a conductor from the outside to the inside.

4. A highly flame-retardant, fire-resistant and durable power cable according to claim 3, characterized in that: The upper bracket includes two clamping plates, a connecting plate connecting the two clamping plates, an upper mounting plate connected to the connecting plate and located in the upper mounting groove, and an upper plug plate connected to the upper mounting plate and located in the upper receiving groove, the clamping plate includes a first arc panel connected to the connecting plate, a second arc panel connected to the first arc panel, a third arc panel connected to the second arc panel, a fourth arc panel connected to the third arc panel, and a side plate connected to the fourth arc panel, the side plate has a limiting groove, the connecting covering portion is located in the second arc panel, and the side protrusion is located in the fourth arc panel; the lower bracket includes a frame body, a lower mounting plate connected to the frame body and located in the lower mounting groove, a lower plug plate connected to the lower mounting plate and located in the lower receiving groove, and two L-shaped plates connected to the frame, the two sides of the frame having limiting protrusions that cooperate with the limiting grooves, the frame having two supporting grooves for supporting the lower covering unit; a temperature measuring optical fiber is installed in the upper accommodating groove; at least one of the multiple bracket units is a detection bracket unit, a temperature sensor is installed at the lower plug plate at the lower bracket of the detection bracket unit, a connecting pipe is connected between the two second arc panels of the detection bracket unit, the two second arc panels have connecting holes connected to the connecting pipe, and at the protection unit position corresponding to the detection bracket unit, the two connecting covering parts of the protection unit have through-hole parts connected to the connecting hole, and a smoke sensor extending into the connecting pipe is installed at the connecting pipe.

5. A highly flame-retardant, fire-resistant and durable power cable according to claim 4, characterized in that: Two temperature sensors are installed on the lower plug-in board of the lower bracket of the detection bracket unit.

6. A highly flame-retardant, fire-resistant and durable power cable according to claim 4, characterized in that: The L-shaped plate is provided with a plurality of strip-shaped through grooves.

7. A highly flame-retardant, fire-resistant and durable power cable according to claim 4, characterized in that: The heat conduction seat, the two first metal plates and the two second metal plates all extend along the length direction of the cable body; and the cross sections of the first metal plate and the second metal plate are both arc-shaped.

8. A highly flame-retardant, fire-resistant and durable power cable according to claim 4, characterized in that: The first upper covering portion has an upper recessed portion extending along the length direction of the cable body; the lower covering unit has a lower recessed portion extending along the length direction of the cable body.

9. A highly flame-retardant, fire-resistant and durable power cable according to claim 4, characterized in that: The armor layer is a steel wire armor layer, the conductor is a copper conductor, and the wrapping layer is a flame retardant wrapping layer.

10. A highly flame-retardant, fire-resistant and durable power cable according to claim 4, characterized in that: The coating unit is formed by extrusion of PVC material; the protective cover is made of polyethylene material; the heat-conducting seat and the heat-conducting unit are both made of copper-aluminum alloy.

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