Scale armour power cable and laying method

Abstract

The application relates to a scale armoured power cable and a laying method, which comprises a cable body, the cable body comprises a para-aramid reinforced conductor arranged at a central position, and the para-aramid reinforced conductor is sequentially provided with an inner isolation layer, an insulation layer, an outer isolation layer and a sheath layer outside the para-aramid reinforced conductor; the surface of the sheath layer is covered with protective scales; the surface of the sheath layer is provided with grooves; the protective scales are connected with the sheath layer through fixing pins; the protective scales are provided with connecting holes; the front ends of the fixing pins are provided with annular protrusions; the annular protrusions are embedded in the grooves; the middle parts of the protective scales are provided with cavities, and chemical agents are arranged in the cavities. When the chemical agents in the protective scales are disabled, the damaged protective scales or the chemical agents in the protective scales only need to be replaced, and the whole cable does not need to be replaced, so that the maintenance cost is reduced, and the work efficiency is improved.

Description

Technical Field

[0001] This invention relates to a cable, specifically to a scale-armored power cable and a method for laying it. Background Technology

[0002] A power cable is a cable used for transmitting and distributing electrical energy, with copper or aluminum as the conductor and an appropriate insulating sheath wrapped around it. Power cables are commonly used in urban underground power grids, power plant lead-out lines, internal power supply in industrial and mining enterprises, and underwater transmission lines across rivers and seas. With the continuous development of cities and the need for power supply safety and a clean urban appearance, more and more power cables are buried underground, forming urban underground power grids. To ensure stable and safe power supply, power cables generally need to be armored to provide a certain level of protection against accidental damage. During urban road repairs or reconstruction, power cables are highly susceptible to damage from mechanical forces such as excavators.

[0003] When cables are laid underground for extended periods, the probability of them encountering rodents, termites, and other organisms increases. To prevent biological damage, a common method is to add chemical agents to the sheath, which provide protection against biological attack. However, over time, these chemical agents become ineffective, leading to a decrease in cable safety and affecting cable reliability.

[0004] Existing armored power cables are mostly made of individual spiral-wound steel strips or wires. Steel strip armor has good impact resistance, but its tensile strength is limited, and it cannot provide effective protection when the power cable is stretched. Steel wire armor improves the tensile strength of the power cable, enhances its tensile strength, compressive strength and other mechanical protection, and extends its service life.

[0005] However, armored cables also have obvious disadvantages. Armored cables have a larger bending radius, and the armor layers of modern armored cables are very rigid and heavy to protect the internal conductors and cores. This makes transportation very difficult, hindering installation and laying. Both manual and mechanical operations require significant force, and cutting, inspection, and maintenance are also very troublesome, as the cables are not easily broken or opened. This causes considerable inconvenience for users. Furthermore, when the armor layer is damaged, replacing the damaged cable involves a large amount of work, a long construction period, and high maintenance costs. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the present invention provides a scale armored power cable with simple structure, easy transportation, convenient cutting, inspection and maintenance, extended service life of power cable and reduced maintenance cost.

[0007] The technical solution adopted in this invention is:

[0008] A scale-armored power cable includes a cable body, which includes an aramid-reinforced conductor located at the center. An inner insulating layer, an insulation layer, an outer insulating layer, and a sheath layer are sequentially arranged outside the aramid-reinforced conductor. The surface of the sheath layer is covered with protective scales. Grooves are provided on the surface of the sheath layer. The protective scales are connected to the sheath layer via fixing pins. Connecting holes are provided on the protective scales, and an annular protrusion is provided at the front end of the fixing pin. The annular protrusion is embedded in the groove. A cavity is provided in the middle of the protective scales, and a chemical agent is disposed within the cavity.

[0009] The protective scales include a base and a top cover, with the top cover fastened to the base, forming a cavity in the middle; the surface of the base is arc-shaped.

[0010] The retaining pin is an elastic body with a metal layer covering its head; the groove is a stepped groove.

[0011] The retaining pin is an elastic body with a metal layer covering the head; the groove is a T-shaped groove.

[0012] Adjacent protective scales arranged along the axis overlap each other; the rear protective scale overlaps the rear end surface of the front protective scale; adjacent protective scales arranged along the circumference abut each other; and protective scales arranged along the axis are connected by fixing pins.

[0013] The protective scales have four connection holes.

[0014] The protective scales are oval or rectangular in shape.

[0015] A method for laying scale-armored power cables includes the following steps:

[0016] Step 1: Process the cable body, protective scales, and fixing pins respectively;

[0017] Step 2: Transport the cable body, protective scales, and fixing pins to the construction site;

[0018] Step 3: Connect the protective scales to the cable body using fixing pins; starting from the end of the cable body, first install the first layer of protective scales along the circumferential direction, with adjacent protective scales abutting against each other; then install the second layer of protective scales; the second layer of protective scales overlaps the surface of the first layer of protective scales, and install the subsequent protective scales in sequence;

[0019] Step 4: Connect the assembled cable to the equipment;

[0020] Step 5: The protective scales on the cable surface are damaged. Remove the damaged protective scales from the cable body.

[0021] Step 6: Replace the protective scales with new ones and connect them to the cable body using new fixing pins.

[0022] A method for laying scale-armored power cables includes the following steps:

[0023] Step 1: Process the cable body, protective scales, and fixing pins respectively;

[0024] Step 2: Transport the cable body, protective scales, and fixing pins to the construction site;

[0025] Step 3: Connect the protective scales to the cable body using fixing pins; starting from the end of the cable body, first install the first layer of protective scales along the circumferential direction, with adjacent protective scales abutting against each other; then install the second layer of protective scales; the second layer of protective scales overlaps the surface of the first layer of protective scales, and install the subsequent protective scales in sequence;

[0026] Step 4: Connect the assembled cable to the equipment;

[0027] Step 5: The protective scales on the cable surface are damaged. Remove the protective scales from the cable body.

[0028] Step 6: Replace the protective scales with new ones or open the protective scale cover, replace the chemical agent, fasten the cover, and connect it to the cable body using the new fixing pin.

[0029] Along the length of the cable, protective flakes of different thicknesses are placed according to the on-site laying environment; the quantity and type of chemical agents placed in the middle of the protective flakes are adjusted.

[0030] The advantages of this invention over the prior art are:

[0031] The present invention relates to a scale-armored power cable, wherein the cable surface is provided with protective scales, and the protective scales are movably connected to the cable body. When the protective scales are damaged, only the damaged protective scales need to be replaced, instead of replacing the entire cable, thereby reducing maintenance costs and improving work efficiency.

[0032] The scale-armored power cable of the present invention allows for the replacement of only the damaged protective scales or the chemical reagents within the protective scales when the chemical reagents in the protective scales fail, without the need to replace the entire cable, thus reducing maintenance costs and improving work efficiency.

[0033] The present invention relates to a scale-armored power cable, in which the cable body and scales are separate structures. Compared with ordinary armored cables, the bending radius is greatly reduced, which facilitates transportation. Since the cable does not have an armor layer, it is easy to cut. Scales are not installed at the wiring position at the cable end, which facilitates operation. Scales of the appropriate length are installed after wiring as needed, which improves construction efficiency and effectively protects the cable, preventing damage to the internal core when the armor layer is stripped.

[0034] This invention relates to a scale-armored power cable. When the cable laying environment changes, the thickness of the scales and the chemical reagents within them can be adjusted, enabling the cable to adapt to various complex biological and natural environments. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the scale-armored power cable of the present invention;

[0036] Figure 2 This is a schematic diagram of the protective scale installation process of the first embodiment of the scale-armored power cable of the present invention;

[0037] Figure 3 This is a schematic diagram of the protective scale installation process of the second embodiment of the scale-armored power cable of the present invention;

[0038] Figure 4 This is a top view of the cable after the protective scales of the first embodiment of the scale-armored power cable of the present invention have been installed;

[0039] Figure 5 This is a top view of the cable after the protective scales of the second embodiment of the scale-armored power cable of the present invention have been installed;

[0040] Figure 6 This is a top view of the cable after the protective scales of the third embodiment of the scale-armored power cable of the present invention have been installed;

[0041] Figure 7 This is a schematic diagram of the protective scale structure of the scale-armored power cable of the present invention.

[0042] Explanation of symbols for key components in the attached diagram:

[0043] In the picture:

[0044] 1. Aramid reinforced conductor 2. Inner insulating layer

[0045] 3. Insulation layer 4. Outer isolation layer

[0046] 5. Sheath layer 6. Protective scales

[0047] 7. Groove 8. Fixing pin

[0048] 9. Circular protrusion. 61. Top cover.

[0049] 62. Base; 9. Chemical reagents

[0050] 10. Connecting hole Detailed Implementation

[0051] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0052] Example 1, Appendix Figure 2and 4 This is a schematic diagram of the overlapping installation structure of rectangular protective scales.

[0053] Example 2, Appendix Figure 3 and 5 This is a schematic diagram of the overlapping installation structure of the elliptical protective scales.

[0054] Example 3, Appendix Figure 6 This is a schematic diagram of the docking and installation structure of rectangular protective scales.

[0055] Appendix Figure 1-7 It is known that a scale-armored power cable includes a cable body, which includes an aramid-reinforced conductor located at the center. An inner isolation layer, an insulation layer, an outer isolation layer, and a sheath layer are sequentially arranged outside the aramid-reinforced conductor. The surface of the sheath layer is covered with protective scales. Grooves are provided on the surface of the sheath layer. The protective scales are connected to the sheath layer by fixing pins. Connecting holes are provided on the protective scales, and an annular protrusion is provided at the front end of the fixing pin. The annular protrusion is embedded in the groove. A cavity is provided in the middle of the protective scales, and a chemical agent is placed inside the cavity.

[0056] The protective scales include a base and a top cover, with the top cover fastened to the base, forming a cavity in the middle; the surface of the base is arc-shaped.

[0057] The retaining pin is an elastic body with a metal layer covering its head; the groove is a stepped groove.

[0058] The retaining pin is an elastic body with a metal layer covering the head; the groove is a T-shaped groove.

[0059] Adjacent protective scales along the axis overlap each other; adjacent protective scales along the circumference connect with each other; and protective scales along the axis are connected by fixing pins.

[0060] The protective scales have four connection holes.

[0061] The protective scales are oval or rectangular in shape.

[0062] A scale-armored power cable includes an aramid-reinforced conductor located at the center. An inner isolation layer, an insulation layer, an outer isolation layer, and a sheath layer are sequentially arranged outside the aramid-reinforced conductor. Radial protrusions are provided on the surface of the sheath layer. The surface of the sheath layer is covered with protective scales. The protective scales are provided with connection holes. The radial protrusions penetrate the connection holes.

[0063] A method for laying scale-armored power cables includes the following steps:

[0064] Step 1: Process the cable body, protective scales, and fixing pins respectively;

[0065] Step 2: Transport the cable body, protective scales, and fixing pins to the construction site;

[0066] Step 3: Connect the protective scales to the cable body using fixing pins; starting from the end of the cable body, first install the first layer of protective scales along the circumferential direction, with adjacent protective scales abutting against each other; then install the second layer of protective scales; the second layer of protective scales overlaps the surface of the first layer of protective scales, and install the subsequent protective scales in sequence;

[0067] Step 4: Connect the assembled cable to the equipment;

[0068] Step 5: The protective scales on the cable surface are damaged. Remove the damaged protective scales from the cable body.

[0069] Step 6: Replace the protective scales with new ones and connect them to the cable body using new fixing pins.

[0070] A method for laying scale-armored power cables includes the following steps:

[0071] Step 1: Process the cable body, protective scales, and fixing pins respectively;

[0072] Step 2: Transport the cable body, protective scales, and fixing pins to the construction site;

[0073] Step 3: Connect the protective scales to the cable body using fixing pins; starting from the end of the cable body, first install the first layer of protective scales along the circumferential direction, with adjacent protective scales abutting against each other; then install the second layer of protective scales; the second layer of protective scales overlaps the surface of the first layer of protective scales, and install the subsequent protective scales in sequence;

[0074] Step 4: Connect the assembled cable to the equipment;

[0075] Step 5: The protective scales on the cable surface are damaged. Remove the protective scales from the cable body.

[0076] Step 6: Replace the protective scales with new ones or open the protective scale cover, replace the chemical agent, fasten the cover, and connect it to the cable body using the new fixing pin.

[0077] Along the length of the cable, protective flakes of different thicknesses are placed according to the on-site laying environment; the quantity and type of chemical agents placed in the middle of the protective flakes are adjusted.

[0078] The present invention relates to a scale-armored power cable, in which the cable body and scales are separate structures. Compared with ordinary armored cables, the bending radius is greatly reduced, which facilitates transportation. Since the cable does not have an armor layer, it is easy to cut. Scales are not installed at the wiring position at the cable end, which facilitates operation. Scales of the appropriate length are installed after wiring as needed, which improves construction efficiency and effectively protects the cable, preventing damage to the internal core when the armor layer is stripped.

[0079] The present invention relates to a scale-armored power cable, wherein the cable surface is provided with protective scales, and the protective scales are movably connected to the cable body. When the protective scales are damaged, only the damaged protective scales need to be replaced, instead of replacing the entire cable, thereby reducing maintenance costs and improving work efficiency.

[0080] The scale-armored power cable of the present invention allows for the replacement of only the damaged protective scales or the chemical reagents within the protective scales when the chemical reagents in the protective scales fail, without the need to replace the entire cable, thus reducing maintenance costs and improving work efficiency.

[0081] This invention relates to a scale-armored power cable. When the cable laying environment changes, the thickness of the scales and the chemical reagents within them can be adjusted, enabling the cable to adapt to various complex biological and natural environments.

[0082] The present invention relates to a scale-armored power cable, the cable body of which can also be an optical fiber.

[0083] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the structure of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A scale-armored power cable, comprising a cable body, the cable body including an aramid-reinforced conductor disposed at the central position, an inner insulating layer, an insulation layer, an outer insulating layer, and a sheath layer sequentially disposed outside the aramid-reinforced conductor, the surface of the sheath layer being covered with protective scales; grooves being provided on the surface of the sheath layer; the protective scales being connected to the sheath layer by fixing pins; the protective scales being provided with connecting holes, and an annular protrusion being provided at the front end of the fixing pin; the annular protrusion being embedded in the groove; characterized in that: The protective scales have a cavity in the middle, and chemical agents are placed inside the cavity.

2. The scale-armored power cable according to claim 1, characterized in that: The protective scales include a base and a top cover, with the top cover fastened to the base, forming a cavity in the middle; the surface of the base is arc-shaped.

3. The scale-armored power cable according to claim 1, characterized in that: The retaining pin is an elastic body with a metal layer covering its head; the groove is a stepped groove.

4. The scale-armored power cable according to claim 1, characterized in that: The retaining pin is an elastic body with a metal layer covering the head; the groove is a T-shaped groove.

5. The scale-armored power cable according to claim 1, characterized in that: Adjacent protective scales along the axis overlap each other; adjacent protective scales along the circumference connect with each other; and protective scales along the axis are connected by fixing pins.

6. The scale-armored power cable according to claim 1, characterized in that: The protective scales have four connection holes.

7. The scale-armored power cable according to claim 1, characterized in that: The protective scales are oval or rectangular in shape.

8. A method for laying a scale-armored power cable according to any one of claims 1 to 6, characterized in that... Includes the following steps: Step 1: Process the cable body, protective scales, and fixing pins respectively; Step 2: Transport the cable body, protective scales, and fixing pins to the construction site; Step 3: Connect the protective scales to the cable body using fixing pins; starting from the end of the cable body, first install the first layer of protective scales along the circumferential direction, with adjacent protective scales abutting against each other; then install the second layer of protective scales; the second layer of protective scales overlaps the surface of the first layer of protective scales, and install the subsequent protective scales in sequence; Step 4: Connect the assembled cable to the equipment; Step 5: The protective scales on the cable surface are damaged. Remove the damaged protective scales from the cable body. Step 6: Replace the protective scales with new ones and connect them to the cable body using new fixing pins.

9. A method for laying a scale-armored power cable according to any one of claims 1 to 6, characterized in that... Includes the following steps: Step 1: Process the cable body, protective scales, and fixing pins respectively; Step 2: Transport the cable body, protective scales, and fixing pins to the construction site; Step 3: Connect the protective scales to the cable body using fixing pins; starting from the end of the cable body, first install the first layer of protective scales along the circumferential direction, with adjacent protective scales abutting against each other; then install the second layer of protective scales; the second layer of protective scales overlaps the surface of the first layer of protective scales, and install the subsequent protective scales in sequence; Step 4: Connect the assembled cable to the equipment; Step 5, when the chemical reagents placed in the protective scales become ineffective; Step 6: Open the protective scale cover that has expired due to the chemical reagent, replace it with a new chemical reagent, fasten the cover, and connect it to the cable body using a new fixing pin.

10. The method for laying scale-armored power cables according to claim 8, characterized in that: Along the length of the cable, protective flakes of different thicknesses are placed according to the on-site laying environment; the quantity and type of chemical agents placed in the protective flakes are adjusted.

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