CN202650666U - High-power frequency conversion cable applied to nuclear power - Google Patents
High-power frequency conversion cable applied to nuclear power Download PDFInfo
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- CN202650666U CN202650666U CN 201220141551 CN201220141551U CN202650666U CN 202650666 U CN202650666 U CN 202650666U CN 201220141551 CN201220141551 CN 201220141551 CN 201220141551 U CN201220141551 U CN 201220141551U CN 202650666 U CN202650666 U CN 202650666U
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- frequency conversion
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Abstract
The utility model relates to a high-power frequency conversion cable applied to nuclear power. The high-power frequency conversion cable applied to nuclear power comprises a cable core, an oxygen barrier layer, a total shielding layer and an outer protective layer, wherein the cable core, the oxygen barrier layer, the total shielding layer and the outer protective layer are sequentially extruded from inside to outside. The cable core comprises three insulation wire cores, a filling layer and a belt. Each insulation wire core is composed of a conductor, conductor shielding, insulation, insulation shielding and metal shielding, wherein the conductor, the conductor shielding, the insulation, the insulation shielding and the metal shielding are sequentially arranged from inside to outside. The filling layer is filled between the three insulation wire cores and the belt. The total shielding layer adopts a longitudinal wrap copper plastic belt structure. According to the utility model, the shielding adopts a structure combining separated shielding and total shielding; the total shielding adopts a corrugated copper tube structure; the shielding inhibition coefficient is less than 0.01, thus the effect of completely sealed shielding of the cable is realized; the whole cable is easy to bend, can effectively inhibit the radiation and conduction of a higher harmonic and an electromagnetic wave, thus the radiation of the whole system and the bearing current of a frequency conversion motor are reduced; the abrasion of the frequency conversion motor is reduced; and the properties of water resistance and corrosion resistance are great.
Description
Technical field
The utility model relates to a kind of cable, particularly a kind of nuclear power high-power frequency conversion cable.
Background technology
Development along with power electronic technology, frequency control is little with its volume, the equipment investment expense is few, simple in structure, volume is little, cost is low, energy-conservation (30%-40%), speed adjustable range is large, easy to use, electric pressure is high (having reached at present 10kV), the large advantages such as (having reached at present 10000KW) of capacity, the purposes on nuclear power is more and more extensive.Frequency control has the characteristics such as permanent power, permanent rotating speed, and still, there are following distinct issues simultaneously in frequency control:
Can produce inevitably higher harmonic current and high order harmonic component when 1) frequency converter is worked disturbs, this higher harmonic current might cause that the overload relaying protection produces misoperation and causes accident to occur on the electrical network, and higher harmonic current also can make the power supply quality of electrical network degenerate simultaneously;
2) high order harmonic component emission strong electromagnetic wave makes various electronic equipments be subject to serious interference can to cause the signal of communication distortion, monitors and controls malfunctioning or produce misoperation;
3) high order harmonic component can produce electromagnetic coupled to contiguous loop by line capacitance and disturb the normal operation in other loop;
4) must avoid electric current and voltage generation resonance: because the existence of high order harmonic component, in case the consequence that certain subharmonic and frequency converter one side electric current or motor one side voltage generation resonance will cause electric equipment seriously to burn, and this class resonance is relevant with cable length, wish that generally cable has higher resonance point, the square root that is to say the product of the inductance capacitance of wishing cable has smaller value, so just can obtain larger cable length and resonance does not occur.
Because there are above-mentioned serious problems in frequency control, and common 3 cores, (3+1) core 6-35kV power cable, because the structure unsymmetrical balance, the electric field of cable, magnetic field are in non-equilibrium state all the time, and transfer impedance is high, and the high order harmonic component emission measure is large; Because the high-frequency impulse withstand voltage properties of insulating material is poor and the insulation thickness selection is improper, insulation punctures easily; The screen of common shielded type cable adopts aluminium foil, aluminium strip lapping structure in addition, shielding properties is poor, can not the establishment high order harmonic component in frequency conversion speed-adjusting system, electromagnetic radiation and conduction, there are serious electromagnetic interference and larger motor bearings electric current in system, can reduce the useful life of cable, motor, even the accidents such as puncture can appear in cable insulation, the construction of cable as another is difficult to adapt to the requirement of nuclear power Special use, such as fire-retardant, low cigarette, Halogen, without the burn into radiation hardness etc., therefore can't adapt to this type of nuclear power with the requirement of frequency conversion occasion.
The utility model content
The purpose of this utility model is to solve the problem that above-mentioned prior art exists, and the waterproof high-power frequency conversion system cable peculiar to vessel that is suitable for that a kind of shield effectiveness is good, have good waterproof, the combination property such as flexible is provided.
The technical scheme that realizes the utility model purpose is a kind of nuclear power high-power frequency conversion cable, comprises the cable core, oxygen barrier layer, total screen and the outer jacket that extrude successively from the inside to the outside; Described cable core comprises that three thoroughly do away with edge core, packed layer and band, described every eradication edge core is comprised of the conductor that sets gradually from the inside to the outside, conductor screen, insulation, insulation shielding and metallic shield, and described packed layer is filled between three insulated wire cores and the band; Described total screen adopts the wrinkle copper pipe structure.
The three-phase equilibrium symmetrical structure that described cable core adopts, as three of three-phase thoroughly do away with edge core close contacts arrange be how much symmetrical.
The conductor of the insulated wire cores of described cable core is that the 2nd similar round that meets GB/T 3956-2008 regulation presses structure.
Overlapping wrapped the forming of combarloy band adopted in the metallic shield of the insulated wire cores of described cable core.
The packed layer of described cable core adopts alkali-free glass wool flame-retardant rope interstitital texture.
Adopted technique scheme, the utlity model has following beneficial effect: (1) shielding of the present utility model adopts separated-shielding to add up the structure of shielding, always shield simultaneously the wrinkle copper pipe structure, shielding rejection coefficient＜0.01, reached the effect of the complete closed shield of cable, whole cable is easy to bending, can effectively suppress high order harmonic component, electromagnetic radiation and conduction, the radiation of whole system and the shaft current of variable-frequency motor have been reduced, thereby reduced the wearing and tearing of variable-frequency motor, guaranteed that cable moves reliably and with long-term and lay the maximum adaptation of environment.
(2) because the cable core of cable of the present utility model adopts special three-phase equilibrium symmetrical structure, it is how much symmetrical to be that the mutual close contact of three phase isolated core is, therefore reached the symmetrical balance of the every electric parameter of cable, (comprise the various electric parameters such as inductance, electric capacity) containing under the high order poised state, transfer impedance is low, the high order harmonic component emission measure is little, the operational insulation of cable is in optimum state and brings into play fully its insulation level, guarantee that cable retention under high-frequency impulse emission effect is stable, safe and reliable.
(3) insulation of insulated wire cores of the present utility model adopts Thickness Ratio GB/T 12706-2008 to stipulate that the high dielectric crosslinked polyethylene of thick 3-5mm is as the insulation of cable, insulating performance of cable is good, dielectric property are high, can stand long-term constantly impact of high-frequency impulse reflection stack (2-3 times) voltage; Band adopts the low smoke and zero halogen band; Oxygen barrier layer adopts thermoplastic low-smoke halogen-free flame-resistant oxygen barrier layered material to extrude and forms, and oxygen index is up to 45; Outer jacket adopts the low-smoke halogen-free flame-retardant radiation resistant protective cover material; have fire-retardant, low cigarette, Halogen, without the burn into radiation hardness; so that cable make process, transport, lay and use procedure in; produce without poisonous and harmful substance; to human body without any health effect; surrounding environment without any pollution, natural resources and biological environment have been protected greatly.
(5) good, the voltge surge of anti-pulse-echo performance height, electrical structure balanced, symmetrical of the utility model shield effectiveness, have fire-retardant, low cigarette, Halogen, without combination properties such as burn into radiation hardness, but Secure Application is in the nuclear power frequency-changing cable.
Description of drawings
Content of the present utility model is easier to be expressly understood in order to make, and the below is described in further detail the utility model, wherein according to specific embodiment also by reference to the accompanying drawings
Fig. 1 is structural representation of the present utility model.
Attached number in the figure is:
Cable core 1, insulated wire cores 11, conductor 11-1, conductor screen 11-2, insulation 11-3, insulation shielding 11-4, metallic shield 11-5, packed layer 12, band 13, oxygen barrier layer 2, total screen 3, outer jacket 3.
Embodiment
(embodiment 1)
See Fig. 1, a kind of nuclear power high-power frequency conversion cable of present embodiment comprises the cable core 1, oxygen barrier layer 2, total screen 3 and the outer jacket 3 that extrude successively from the inside to the outside.Total screen 2 adopts the wrinkle copper pipe structure, and shielding properties is superior.
Cable core 1 comprises that three thoroughly do away with edge core 11, packed layer 12 and band 13.Every eradication edge core 11 is comprised of the conductor 11-1 that sets gradually from the inside to the outside, conductor screen 11-2, insulation 11-3, insulation shielding 11-4 and metallic shield 11-5, and packed layer 12 is filled between three insulated wire cores 11 and the band 13; The three-phase equilibrium symmetrical structure that cable core 1 adopts, as three of three-phase thoroughly do away with edge cores 11 close contacts arrange be how much symmetrical.Conductor 11-1 is that the 2nd similar round that meets GB/T 3956-2008 regulation presses structure.Metallic shield 11-5 adopts overlapping wrapped the forming of combarloy band.Packed layer 12 adopts alkali-free glass wool flame-retardant rope interstitital texture.
In the selection of material, conductor screen 11-2 and insulation shielding 11-4 all adopt the polyolefin semiconductive shieldin material to extrude and form; Insulation 11-3 adopts Thickness Ratio GB/T 12706-2008 to stipulate the high dielectric crosslinked polyethylene (XLPE) of thick 3-5mm; Band 13 adopts the low smoke and zero halogen band; Oxygen barrier layer 2 adopts thermoplastic low-smoke halogen-free flame-resistant oxygen barrier layered material to extrude and forms, and oxygen index is up to 45; Outer jacket 4 adopts the low-smoke halogen-free flame-retardant radiation resistant protective cover material; have fire-retardant, low cigarette, Halogen, without the burn into radiation hardness; so that cable make process, transport, lay and use procedure in; produce without poisonous and harmful substance; to human body without any health effect; surrounding environment without any pollution, natural resources and biological environment have been protected greatly.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (5)
1. a nuclear power high-power frequency conversion cable is characterized in that: comprise the cable core (1), oxygen barrier layer (2), total screen (3) and the outer jacket (4) that extrude successively from the inside to the outside; Described cable core (1) comprises that three thoroughly do away with edge core (11), packed layer (12) and band (13), described every eradication edge core (11) is comprised of the conductor that sets gradually from the inside to the outside (11-1), conductor screen (11-2), insulation (11-3), insulation shielding (11-4) and metallic shield (11-5), and described packed layer (12) is filled between three insulated wire cores (11) and the band (13); Described total screen (2) adopts wrinkle copper sheathing structure.
2. a kind of nuclear power high-power frequency conversion cable according to claim 1 is characterized in that: the three-phase equilibrium symmetrical structure that described cable core (1) adopts, as three of three-phase thoroughly do away with edge core (11) close contacts arrange be how much symmetrical.
3. a kind of nuclear power high-power frequency conversion cable according to claim 2 is characterized in that: the conductor (11-1) of the insulated wire cores (11) of described cable core (1) presses structure for the 2nd similar round that meets GB/T 3956-2008 regulation.
4. a kind of nuclear power high-power frequency conversion cable according to claim 3 is characterized in that: overlapping wrapped the forming of metallic shield (11-5) employing combarloy band of the insulated wire cores (11) of described cable core (1).
5. a kind of nuclear power high-power frequency conversion cable according to claim 4 is characterized in that: packed layer (12) the employing alkali-free glass wool flame-retardant rope interstitital texture of described cable core (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220141551 CN202650666U (en) | 2012-04-06 | 2012-04-06 | High-power frequency conversion cable applied to nuclear power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220141551 CN202650666U (en) | 2012-04-06 | 2012-04-06 | High-power frequency conversion cable applied to nuclear power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202650666U true CN202650666U (en) | 2013-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220141551 Expired - Fee Related CN202650666U (en) | 2012-04-06 | 2012-04-06 | High-power frequency conversion cable applied to nuclear power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202650666U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107301900A (en) * | 2017-06-22 | 2017-10-27 | 重庆鸽牌电线电缆有限公司 | 35KV multilayer flashing cables |
-
2012
- 2012-04-06 CN CN 201220141551 patent/CN202650666U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107301900A (en) * | 2017-06-22 | 2017-10-27 | 重庆鸽牌电线电缆有限公司 | 35KV multilayer flashing cables |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20210406 |
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| CF01 | Termination of patent right due to non-payment of annual fee |