CN212847846U - 66kV and above high buffering antidetonation power cable - Google Patents

Abstract

The utility model relates to a 66kV and above high buffering antidetonation power cable, be for the problem that the slippage easily appears when solving the cable insulating deformation and having the drop easily appearing when vibrations, including wrinkle aluminium cover, the inside of wrinkle aluminium cover is equipped with the conductor, and the outside parcel of wrinkle aluminium cover has anti-skidding oversheath, and the skin of conductor is equipped with conductor insulation shield cover, and conductor insulation shield cover's surface is equipped with foaming buffering antidetonation layer and semiconduction buffer layer that blocks water, and foaming buffering antidetonation layer and semiconduction buffer layer interval that blocks water encircle the distribution on conductor insulation shield cover, and the interval department packing of foaming buffering antidetonation layer and semiconduction buffer layer that blocks water has the filling layer. The design of encircleing of antidetonation layer and buffer layer does benefit to and covers conductor insulation shield cover comprehensively, and shielding effect and insulating effect have further been guaranteed to foaming buffering antidetonation layer and semiconduction buffer layer that blocks water, and the packing layer wrapping structure sets up rationally, reduces the required cost of manufacturing the cable, has reduced transportation and laying process in, damages when needing the collision or receiving the high pressure, has improved the quality of cable, is applicable to harsh environment such as the overhead bridge lays that the drop is great.

Description

66kV and above high buffering antidetonation power cable

Technical Field

The utility model relates to a cable structure design technique especially relates to a 66kV and above high buffering antidetonation power cable.

Background

At present, with the rapid development of socio-economic, the power cable is as important as the aorta. The range of electricity used is increasing, with a consequent increase in the amount of electricity used and the amount of electric power lines used, whereas a cable, a member of increasing weight of electric power lines, is composed of one or more mutually insulated conductors, usually housed in a sealed sheath surrounded by a covering layer and an insulating protective layer, and plays a very important role in the transmission of electric power, being able to transmit electric power or information from one place to another, that is to say to transmit, distribute electric energy or transmit electric signals. There are many types of cables, among which the power cable is a cable product used in the trunk line of the power system for transmitting and distributing high-power electric energy, and it is commonly used for transmitting and distributing electric energy, especially for urban underground power grid, power station outgoing line, power supply in industrial and mining enterprises and underwater power transmission line crossing river sea, which has great requirements on the section of the conductive core of the power cable, weight per unit length and especially current-carrying capacity.

In the prior art, the cable structure design has some defects which are worthy of improvement:

when laying power cable, its inside conductor causes the aversion easily, not only can let the cable conductor use receive the influence, still can lead to the emergence accident, leaves the potential safety hazard, because prior art's cable all is the stereoplasm cable, withstand voltage degree is lower, is receiving the extrusion easily at laying process, makes protective sheath and inner structure damage, and inside cable receives vibrations extrusion damage because of not protecting, and life also can discount greatly. The cable is more likely to be broken due to limited shock resistance and shaking during an earthquake, the power-on capacity is damaged, and once the shaking exceeds a certain limit along with the shaking of a building, the tension limit of the cable is often exceeded, and the cable is broken.

Some cables can set up the support frame, but at the in-process of cable manufacture, transportation and laying, because bend and be difficult to avoid, consequently cause the support frame to damage easily, further still can damage the cable core, nevertheless do not have the cable of support frame, the weight of cable core is supported by the buffer layer completely, causes the damage of buffer layer easily to reduce the life of cable, still can increase the transportation of cable and lay the degree of difficulty simultaneously.

The typewriter ribbon that cable core surface set up originally is for distinguishing the cable in order to make things convenient for distinguishing, but in actual work, the cable size is great, and the structure is more complicated, and the operation of workman is very influenced to the cable that has the typewriter ribbon, and the staff often has to consume more physical power and tears the typewriter ribbon and specially does the mark to the cable core again.

In the prior art, the cable material has some defects which are worthy of improvement:

oil-impregnated paper insulation power cables are commonly used in the market, and oil-impregnated paper is used as an insulation material for insulated power cables, plastic insulation power cables and rubber insulation power cables.

The oil-impregnated paper insulated power cable has the longest application history by using oil-impregnated paper as insulation. It is safe, reliable, long in service life and low in cost. The main disadvantage is that laying is limited by the drop. Since the development of the non-dripping impregnated paper insulation, the problem of fall limitation is solved, so that the oil impregnated paper insulation cable can be continuously and widely applied.

The plastic insulation power cable is a power cable with an insulation layer made of extruded plastic. Common plastics are polyvinyl chloride, polyethylene, crosslinked polyethylene. The plastic cable is simple in structure, convenient to manufacture and process, light in weight, convenient to lay and install and free of laying fall limitation. Therefore, the cable is widely applied to medium and low voltage cables and has the tendency of replacing the viscous impregnated oilpaper cable. The greatest disadvantage is the presence of treeing breakdown, which limits its use at higher voltages.

The insulating layer of the rubber insulated power cable is formed by adding various compounding agents to rubber, fully mixing, extruding and wrapping the rubber on a conductive wire core, and heating and vulcanizing. It is soft, elastic and suitable for frequent moving and small bending radius.

In summary, because the extra-high voltage cable laid under the bridge has the adverse factors of large ground height drop, bridge vibration and the like, the insulation deformation phenomenon is easy to occur, and the slippage is easy to occur when the drop exists, so the structures and materials can not be effectively used for a long time. Therefore, there is a need for an improved power cable that overcomes the drawbacks.

For example, a patent that discloses on chinese patent literature, its publication number is CN207182979U a withstand voltage power cable, including the cable body, a serial communication port, the cable body includes the filling layer, the shielding layer, antidetonation decompression layer and outer protective sheath, the shielding layer wraps up in the outer wall of filling layer, the outer wall of shielding layer is provided with antidetonation decompression layer, the outer wall of antidetonation decompression layer is provided with outer protective sheath, the inside that is provided with wire net shielding layer in the filling layer is inlayed and is had the electrical conductor, the inside of electrical conductor is provided with the electric core, the both ends of antidetonation decompression layer are provided with the bleeder vent, the inside of antidetonation decompression layer is provided with a plurality of decompression and detains, be provided with the pressure relief vent between a plurality of decompression detain, the.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a solve the cable and easily appear insulating deformation and have the problem that the slippage easily appears when the drop when vibrations, provide a 66kV and above high buffering antidetonation power cable, guaranteed the shielding effect and the insulating effect of cable, reduce the required cost of manufacturing cable, be applicable to harsh environment such as the drop is great when overhead bridge lays.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a 66kV and above high buffering antidetonation power cable, includes wrinkle aluminium cover, and the inside of wrinkle aluminium cover is equipped with the conductor, and the outside parcel of wrinkle aluminium cover has anti-skidding oversheath, the skin of conductor is equipped with conductor insulation shielding cover, the surface of conductor insulation shielding cover is equipped with foaming buffering antidetonation layer and semi-conductive buffer layer that blocks water, foaming buffering antidetonation layer and semi-conductive buffer layer interval that blocks water encircle the distribution and are in on the conductor insulation shielding cover, the interval department of foaming buffering antidetonation layer and semi-conductive buffer layer that blocks water is filled there is the filling layer. The conductor and the conductor insulation shielding sleeve can be connected in a covering mode through tension force, the conductor insulation shielding sleeve electrically isolates the wire cores from the ground and the wire cores of different phases, a cross-linked insulation layer can be used for providing shielding external signals and playing a role in insulation, and the conductor insulation shielding sleeve has high insulation resistance, high breakdown electric field strength, low dielectric loss and low dielectric constant, for example, oil-impregnated paper, polyvinyl chloride, polyethylene, cross-linked polyethylene, rubber and the like are used. The semi-conductive water-blocking buffer layer can effectively prevent the invasion of moisture, the foaming buffer anti-seismic layer and the semi-conductive water-blocking buffer layer are matched with each other in a circle around the conductor insulating shielding sleeve from the most edge of the conductor insulating shielding sleeve, which is favorable for enhancing the buffer effect, thereby better protecting the conductor in the conductor insulation shielding sleeve from external impact, the foaming buffering anti-seismic layer and the semi-conductive water-blocking buffer layer are wound on the conductor insulation shielding sleeve in a staggered way, the friction force between the conductor insulation shielding sleeve and the corrugated aluminum sleeve can be increased by matching with the filling layer, thereby ensuring the stability of the whole structure, the corrugated aluminum sleeve can provide physical protection for the inner conductor insulation shielding sleeve and the foaming buffer anti-seismic layer and the semi-conductive water-blocking buffer layer on the surface of the conductor insulation shielding sleeve, the antiskid outer sheath can be made of polyvinyl chloride materials, has good toughness and is convenient for protecting the structure in the antiskid outer sheath.

Preferably, the filling layer is provided with a plurality of pressure reducing holes, and the pressure reducing holes are communicated with each other in the filling layer. The pressure applied to the cable can be diffused to the periphery through the channels of the pressure reducing holes in the filling layer, so that the cable is lightened, and the conductor is protected from being damaged directly by force.

Preferably, the outer surface of the anti-skid outer sheath is coated with a self-cleaning layer, a plurality of anti-skid convex patterns are arranged on the self-cleaning layer, and the anti-skid convex patterns are sequentially connected to form an annular structure. In order to protect the core of the internal component from being damaged by machinery, moisture, humidity, chemicals, light and the like, dust, waste gas and acid rain and prevent external force from directly damaging the power cable, the self-cleaning layer is a coating developed according to the lotus leaf effect, has a good self-cleaning effect, can effectively prevent harmful substances such as the like from being attached to an anti-skidding outer sheath to cause aging and damage of the internal component, generally adopts lead-aluminum to extrude and seal the sheath for insulation which is easy to be wetted, and the anti-skidding convex patterns are beneficial to increasing friction force and reduce the movement when the anti-skidding convex patterns are installed at the ground or in a bridge.

Preferably, the foaming buffering anti-seismic layer and the semi-conductive water-blocking buffer layer are provided with meshing fixing parts on two sides, and the meshing fixing parts are connected with the filling layer in a meshing manner after being bonded with the conductor insulating shielding sleeve. The meshing fixed part can fix foaming buffering antidetonation layer and semiconduction buffer layer that blocks water on the one hand, makes it not take place to slide by a wide margin, and on the other hand can also fix the filling layer, guarantees its normal work, effectively avoids the filling layer to take place the extrusion deformation or shift receiving external pressure.

Preferably, the conductor is externally provided with a shielding layer, and the conductor comprises a plurality of conductor cores therein, wherein the conductor cores are interwoven with each other. Because the electric power cable passes a large current, a magnetic field can be generated around the current, the shielding layer is made of carbon fibers, the electromagnetic field can be blocked in the cable, and if the shielding layer is made of red copper, the shielding effect can be achieved, external electromagnetic interference is reduced, the influence on other elements is reduced, the carbon flexibility is good, the tensile capacity is strong on the premise that the flexible performance of the cable is not influenced, and the tensile strength of the conductor is increased. The conductor core is the main part of the power cable and mainly plays a role in conducting electricity to transmit electric energy, can be made of high-conductivity materials such as copper or aluminum, and is formed by stranding a single wire or a plurality of wires according to the requirements of laying use conditions and the flexibility degree of the cable.

Preferably, the surfaces of the corrugated aluminum sleeve and the anti-skid outer sheath are provided with color belt layers with different colors. The user can distinguish different parts conveniently, when the antiskid outer sheath is damaged, the wrinkle aluminum sheath with the color different from that of the antiskid outer sheath can be seen through the damaged part, and the antiskid outer sheath can be repaired in time.

Preferably, the thickness of the foaming buffering anti-seismic layer is 0.5mm-2.0 mm. The foaming buffering anti-seismic layer has the functions of buffering and increasing friction force.

Preferably, the port of the corrugated aluminum sleeve is contracted, the sealing sleeve is fixedly sleeved on the inner wall of the port, and the sealing sleeve is in sealing connection with the inner wall of the corrugated aluminum sleeve. The corrugated aluminum sleeve can be made of an aluminum alloy conductor, the conductive capacity is good, heat is generated less, and the sealing sleeve can be made of a rubber material with good sealing performance, so that the corrugated aluminum sleeve and the sealing sleeve are connected in a sealing manner conveniently.

Therefore, the utility model discloses following beneficial effect has:

the winding design of the foaming buffering anti-seismic layer and the semi-conductive water-blocking buffer layer is beneficial to completely covering the conductor insulation shielding sleeve, and the two layers of the foaming buffering anti-seismic layer and the semi-conductive water-blocking buffer layer are wound on the surface of the conductor insulation shielding sleeve to further ensure the shielding effect and the insulating effect of the cable;

the packing layer wrapping structure is reasonable in arrangement, the cost for manufacturing the cable is reduced, the damage of the cable caused by collision or forced pressure in the transportation and laying processes is reduced, the quality of the cable is improved, and the cable is suitable for severe environments such as overhead bridge laying and the like with large fall;

the color band layer can be coated on the coating on the surface of the cable core, so that the color band layer is prevented from falling off, workers can conveniently distinguish the corrugated aluminum sleeve from the anti-slip outer sheath, and the damaged condition can be found as soon as possible by strong contrast.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of a cross-sectional structure of the present invention.

Fig. 3 is a schematic view of a surface structure of a conductor insulation shielding sleeve of the present invention.

In the figure: 1. the conductor comprises a conductor 2, a conductor insulation shielding sleeve 3, a foaming buffering anti-seismic layer 4, a semi-conductive water-blocking buffer layer 5, a corrugated aluminum sleeve 6, an anti-skid outer sheath 7, a filling layer 8, a color tape layer 9, a pressure reducing hole 10, an anti-skid convex pattern a, 0.5mm-2.0mm11, a conductor core 12, a shielding layer 13, a self-cleaning layer 14, a meshing fixing part 15 and a sealing sleeve.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

Example (b):

as shown in the figure, a 66kV and above high buffering antidetonation power cable, including wrinkle aluminium cover 5, the inside of wrinkle aluminium cover 5 is equipped with conductor 1, the outside parcel of wrinkle aluminium cover 5 has anti-skidding oversheath 6, the skin of conductor 1 is equipped with conductor insulation shielding cover 2, the surface of conductor insulation shielding cover 2 is equipped with foaming buffering antidetonation layer 3 and semiconduction buffer layer 4 that blocks water, foaming buffering antidetonation layer 3 and semiconduction buffer layer 4 interval that blocks water encircle and distribute on conductor insulation shielding cover 2, the interval department of foaming buffering antidetonation layer 3 and semiconduction buffer layer 4 that blocks water is filled with filling layer 7. The conductor 1 and the conductor insulation shielding sleeve 2 can be connected in a cladding mode through tension force, the conductor insulation shielding sleeve 2 electrically isolates the wire cores from the ground and the wire cores of different phases, a cross-linked insulation layer can be used for providing shielding external signals, the conductor insulation shielding sleeve plays a role in insulation, and the conductor insulation shielding sleeve has high insulation resistance, high breakdown electric field strength, low dielectric loss and low dielectric constant, for example, oil-impregnated paper, polyvinyl chloride, polyethylene, cross-linked polyethylene, rubber and the like are used. The semi-conductive water-blocking buffer layer 4 can effectively prevent the invasion of water, the foaming buffering anti-seismic layer 3 and the semi-conductive water-blocking buffer layer 4 are arranged from the edge of the conductor insulation shielding sleeve 2, one circle of the foaming buffering anti-seismic layer 3 and the semi-conductive water-blocking buffer layer 4 surrounds the conductor insulation shielding sleeve 2 and are matched with each other to be beneficial to enhancing the buffering effect, so that the conductor 1 in the conductor insulation shielding sleeve 2 is better protected from external impact, the foaming buffering anti-seismic layer 3 and the semi-conductive water-blocking buffer layer 4 are wound on the conductor insulation shielding sleeve 2 in a staggered mode, the friction force between the conductor insulation shielding sleeve 2 and the corrugated aluminum sleeve 5 can be increased by matching the filling layer 7, the stability of the whole structure is further ensured, the corrugated aluminum sleeve 5 can provide physical protection for the inner conductor insulation shielding sleeve 2 and the foaming buffering anti-seismic layer 3 and the semi-, the toughness is better, is convenient for protect the structure in the antiskid oversheath 6.

The filling layer 7 is provided with a plurality of pressure relief holes 9, and the pressure relief holes 9 are communicated with each other in the filling layer 7. The pressure applied to the cable can be diffused to the periphery through the passage of the pressure relief hole 9 in the filling layer 7, so that the cable is lightened, and the conductor 1 is protected from being damaged by direct force.

The outer surface of the antiskid outer sheath 6 is coated with a self-cleaning layer 13, a plurality of antiskid wales 10 are arranged on the self-cleaning layer 13, and the antiskid wales 10 are sequentially connected to form an annular structure. In order to protect the core of the internal component from being damaged by machinery, moisture, humidity, chemicals, light, dust, waste gas and acid rain and prevent external force from directly damaging the power cable, the self-cleaning layer 13 is a coating developed according to the lotus effect, has a good self-cleaning effect, can effectively prevent harmful substances such as the harmful substances from being attached to the anti-slip outer sheath 6 to cause aging and damage of the internal component, generally adopts lead-aluminum to extrude the sealed sheath for insulation which is easy to be affected with damp, and the anti-slip ribs 10 are beneficial to increasing friction force and reducing the movement when being installed at the ground or in a bridge.

And meshing fixing parts 14 are arranged on two sides of the foaming buffering anti-seismic layer 3 and the semi-conductive water-blocking buffer layer 4, and the meshing fixing parts 14 are connected with the filling layer 7 in a meshing manner after being bonded with the conductor insulation shielding sleeve 2. The meshing fixing part 14 can fix the foaming buffering anti-seismic layer 3 and the semi-conductive water-blocking buffer layer 4 on one hand, so that the foaming buffering anti-seismic layer and the semi-conductive water-blocking buffer layer do not slide greatly, and can also fix the filling layer 7 on the other hand, so that the normal work of the filling layer is ensured, and the filling layer 7 is effectively prevented from being extruded and deformed or displaced under the action of external pressure.

The outer part of the conductor 1 is provided with a shielding layer 12, the conductor 1 comprises a plurality of conductor cores 11, and the conductor cores 11 are interwoven together. Because the electric current that the power cable passes through is bigger, can produce the magnetic field around the electric current, and shielding layer 12 is carbon fiber, can block this kind of electromagnetic field in the cable, like red copper material, can play the shielding effect, reduce outside electromagnetic interference, reduce the influence to other components, and its carbon compliance is good moreover, still has very strong tensile strength on the prerequisite that does not influence the compliance performance of cable, increases the tensile strength of conductor 1. The conductor core 11 is the main part of the power cable, and mainly plays a role in conducting electricity to transmit electric energy, the conductor core 11 can be made of high-conductivity materials such as copper or aluminum, and the conductor core is formed by stranding a single wire or a plurality of wires according to the requirements of laying use conditions and the flexibility degree of the cable.

The surfaces of the corrugated aluminum sleeve 5 and the antiskid outer sheath 6 are provided with color belt layers 8 with different colors. The user can distinguish different parts conveniently, when the antiskid outer sheath 6 is damaged, the wrinkle aluminum sleeve 5 with the color different from that of the antiskid outer sheath 6 can be seen through the damaged part, and the repair is carried out in time.

The thickness of the foaming buffering anti-seismic layer 3 is 0.5mm-2.0 mm. The foaming buffering anti-seismic layer 3 has the functions of buffering and increasing friction force.

The port of the corrugated aluminum sleeve 5 is contracted, the sealing sleeve 15 is fixedly sleeved on the inner wall of the port, and the sealing sleeve 15 is in sealing connection with the inner wall of the corrugated aluminum sleeve 5. The corrugated aluminum sleeve 5 can be made of an aluminum alloy conductor, the conductive capacity is good, heat is generated less, and the sealing sleeve 15 can be made of a rubber material with good sealing performance, so that the corrugated aluminum sleeve and the sealing sleeve are connected in a sealing mode conveniently.

The use process and principle are as follows:

when antiskid oversheath 6 received inward pressure or vibrations, the wrinkle aluminium cover 5 transmitted pressure to foaming buffering antidetonation layer 3 and semiconduction buffer layer 4 that blocks water, foaming buffering antidetonation layer 3 and semiconduction buffer layer 4 atress compression extrusion filling layer 7 and then the air in the extrusion filling layer 7, because foaming buffering antidetonation layer 3 and semiconduction buffer layer 4 that blocks water set up around conductor insulation shield cover 2, thereby the pressure accessible of air is to diffusion all around to alleviate in the passageway in the filling layer 7, protected conductor 1 and not received the destruction of power directly, but through slowing down impact pressure, consequently, better antidetonation pressure-reducing capacity has, and then reach the purpose that increases conductor 1's life, and filling layer 7's setting has reduced the use material, manufacturing cost has been reduced.

Claims (8)

1. The utility model provides a 66kV and above high buffering antidetonation power cable, includes wrinkle aluminium cover (5), and the inside of wrinkle aluminium cover (5) is equipped with conductor (1), and the outside parcel of wrinkle aluminium cover (5) has antiskid oversheath (6), characterized by, the skin of conductor (1) is equipped with conductor insulation shield cover (2), the surface of conductor insulation shield cover (2) is equipped with foaming buffering antidetonation layer (3) and semiconduction buffer layer (4) that blocks water, foaming buffering antidetonation layer (3) and semiconduction buffer layer (4) interval are encircleed and are distributed and are in on conductor insulation shield cover (2), the interval department of foaming buffering antidetonation layer (3) and semiconduction buffer layer (4) that blocks water is filled with filling layer (7).

2. A 66kV and above high-buffer anti-seismic power cable as claimed in claim 1, wherein the filling layer (7) is provided with a plurality of pressure relief holes (9), and the pressure relief holes (9) are communicated with each other in the filling layer (7).

3. The 66kV and above high-buffer anti-seismic power cable as claimed in claim 1, wherein the outer surface of the anti-slip outer sheath (6) is coated with a self-cleaning layer (13), a plurality of anti-slip ribs (10) are arranged on the self-cleaning layer (13), and the anti-slip ribs (10) are sequentially connected to form an annular structure.

4. The 66kV and above high-buffer anti-seismic power cable as claimed in claim 1, wherein the foamed buffer anti-seismic layer (3) and the semi-conductive water-blocking buffer layer (4) are provided with engaging and fixing parts (14) at two sides, and the engaging and fixing parts (14) are bonded with the conductor insulation shielding sleeve (2) and then engaged and connected with the filling layer (7).

5. A 66kV and above high buffer anti-seismic power cable according to claim 1, characterized in that the conductor (1) is externally provided with a shielding layer (12), the conductor (1) comprises a plurality of conductor cores (11), and the conductor cores (11) are interwoven with each other.

6. A66 kV and above high-buffer anti-seismic power cable as claimed in claim 1, wherein the corrugated aluminum sleeve (5) and the anti-slip outer sheath (6) are provided with different colored tape layers (8) on the surfaces.

7. A 66kV and above high buffer anti-seismic power cable as claimed in claim 1, wherein the thickness of the foam buffer anti-seismic layer (3) is 0.5mm-2.0 mm.

8. The 66kV and above high-buffer anti-seismic power cable as claimed in claim 1, wherein the port of the corrugated aluminum sleeve (5) is contracted, a sealing sleeve (15) is fixedly sleeved on the inner wall of the port, and the sealing sleeve (15) is in sealing connection with the inner wall of the corrugated aluminum sleeve (5).

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