CN202196611U - Hole enlargement cable - Google Patents
Hole enlargement cable Download PDFInfo
- Publication number
- CN202196611U CN202196611U CN2011203585023U CN201120358502U CN202196611U CN 202196611 U CN202196611 U CN 202196611U CN 2011203585023 U CN2011203585023 U CN 2011203585023U CN 201120358502 U CN201120358502 U CN 201120358502U CN 202196611 U CN202196611 U CN 202196611U
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- China
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- cable
- conductor
- hole enlargement
- layer
- insulating barrier
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- Expired - Lifetime
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Abstract
The utility model discloses a hole enlargement cable which comprises a conductor, an insulation layer, an inner jacket, a shielding layer and an outer jacket. The cross section of the conductor is C-shaped; an inner lining layer is arranged in the cavity in the conductor, and insulation material filler is adopted for the inner lining layer; and the hole enlargement cable is provided with the inner lining layer, the conductor, the insulation layer, the inner jacket, the shielding layer, a metal armoring layer and the outer jacket from inside to outside. A semiconductor shielding layer is arranged on the outer peripheral surface of the inner lining layer; and semiconductor shielding layers are arranged on the outer peripheral surface and the inner peripheral surface of the insulation layer. The hole enlargement cable has the advantages that eddy current loss in cable transmission of electric energy is reduced by utilizing the conductor with the C-shaped cross section, the conductance of the cable can be enhanced by utilizing electric current skin effect, the material is saved, the weight of the cable is reduced and the like.
Description
Technical field
The utility model relates to a kind of hole enlargement cable, is widely used as the power transmission cable of AC and DC power circuit.
Background technology
The existing power cable is a solid cable, has that weight is big, external little, problems such as resistance is big, temperature rise is fast, heat dispersion difference of conductor, in addition because the electric current kelvin effect causes current-carrying capacity of cable existence little and eddy current to cause electric energy loss big.Because the existing cable temperature rise is fast, its cable insulation easy ageing, restriction cable useful life.Solid cable uses metal material many, and weight is big and cost is high, has also increased the difficulty of construction when cable is installed.
The hole enlargement cable is to be benchmark with conventional high-low pressure cable, takes to enlarge cable conductor external diameter technology, loads under the desired conductor diameter prerequisite satisfying cable, reduces the cross-sectional area of lead, thereby reduces the total weight of lead, reduces the cable cost.Expanded conductor has very big application space in the power transmission engineering of big electric current, especially in high pressure, long distances electric power, more wide prospect is arranged.
The utility model content
Problems such as the utility model is the weak point that exists in the above-mentioned prior art for avoiding, and a kind of hole enlargement cable is provided, and cable weight is big to solve, external of conductor is little, resistance is big, and the conductor dbus of equal quality and weight crossed hole enlargement raising transmission line capability.
The utility model adopts following technical scheme for the technical solution problem.
The hole enlargement cable comprises conductor, insulating barrier, inner sheath, screen and oversheath, and its design feature is that the cross section of said conductor is the C font; In the cavity in the said conductor is inner covering, and said inner covering is the filling insulating material thing; The hole enlargement cable is followed successively by from the inside to the outside: inner covering, conductor, insulating barrier, inner sheath, screen, metal armouring layer and oversheath.
The design feature of the hole enlargement cable of the utility model also is:
The outer peripheral face of said inner covering is provided with the shield semiconductors layer; Be provided with the shield semiconductors layer on the outer peripheral face of said insulating barrier and on the inner peripheral surface of said insulating barrier.
Said inner covering and insulating barrier are all processed by crosslinked polyethylene.
Scribble one deck silica gel on the said surface of conductors.
The hole enlargement cable also is provided with end-fitting, and said end-fitting comprises chock and sleeve part; The end that said sleeve part is connected with cable is a cylindrical shape, and the other end of said sleeve part is the plate body that is provided with screw; Said chock is a solid cylinder.
Compared with present technology, the utility model beneficial effect is embodied in:
(1) the hole enlargement cable of the utility model, because the cross section is the C font, when carrying the electric current electric current, skin effect coefficient low (≤1), current resistor is little, and power loss is little;
(2) the hole enlargement cable outer contacting face of the utility model is big, and radiating condition is good, and the cable temperature rise is low, is difficult for overheated and the infringement insulating barrier, thus the useful life of having improved cable;
(3) the hole enlargement cable of the utility model has alleviated the weight of conductor, makes that the weight of cable is lighter, the packing of product, transportation and easy for installation, and also noble metal dosage is few, and with low cost; Because weight is little, can divide dish longer, reduce the transition joint quantity of whole piece circuit, improve the operating safety factor of cable, thereby improve the circuit running quality;
(4) the hole enlargement cable of the utility model, because inner covering is a crosslinked polyethylene, and is provided with the spiral armour, suppleness satisfies the requirement that urban pipe network lays.
The hole enlargement cable of the utility model is particularly useful for the high-voltage great-current circuit, as the electric power handling cable.
Description of drawings
Fig. 1 is the radially sectional drawing of the hole enlargement cable of the utility model.
Fig. 2 is the axial sectional drawing of the hole enlargement cable of the utility model.
Fig. 3 is the front view of sleeve part of end-fitting of the hole enlargement cable of the utility model.
Fig. 4 is the end view of sleeve part of end-fitting of the hole enlargement cable of the utility model.
Fig. 5 is the vertical view of sleeve part of end-fitting of the hole enlargement cable of the utility model.
Split structural representation when Fig. 6 is the mounting end joint of hole enlargement cable of the utility model.
Fig. 7 be the utility model the hole enlargement cable installation the structural representation during end-fitting.
Fig. 8 is the structural representation of transition joint of the hole enlargement cable of the utility model.
Split structural representation when Fig. 9 is the installation transition joint of hole enlargement cable of the utility model.
Figure 10 be the utility model the hole enlargement cable installation the structural representation during transition joint.
Label in accompanying drawing 1～accompanying drawing 10: 1 inner covering, 2 conductors, 3 insulating barriers, 4 inner sheaths, 5 screens, 6 spiral armours, 7 oversheaths, 8 sleeve parts, 81 screws, 9 chocks, 10 transition joints.
Below pass through embodiment, and combine accompanying drawing that the utility model is described further.
Embodiment
Referring to Fig. 1～Fig. 2, the hole enlargement cable comprises conductor 2, insulating barrier 3, inner sheath 4, screen 5 and oversheath 7.The cross section of said conductor 2 is the C font; In the cavity in the said conductor 2 is inner covering 1, and said inner covering 1 is the filling insulating material thing; The hole enlargement cable is followed successively by from the inside to the outside: inner covering 1, conductor 2, insulating barrier 3, inner sheath 4, screen 5, metal armouring layer 6 and oversheath 7.Because the cross section of conductor is set to the C font, conductor is hollow state, utilizes the electricity of the kelvin effect increase cable of electric current to lead; Current resistor is little; Practice thrift material simultaneously, reduced the weight of conductor part, thereby made cable have advantages such as cost is lower, weight is light, temperature rise is little.
Said conductor is a sandwich construction, and the number of plies can require according to the thickness of cable to adjust, and conductor is double-deck conductor among Fig. 1.The hole enlargement cable of the utility model also can be made the form of multicore cable, and each cable core comprises inner covering 1, conductor 2, insulating barrier 3 and screen 5, and the outside turnkey of cable core is covered with metal armouring layer 6 and oversheath 7.
The outer peripheral face of said inner covering 1 is provided with the shield semiconductors layer; Be provided with the shield semiconductors layer on the outer peripheral face of said insulating barrier 4 and on the inner peripheral surface of said insulating barrier 4.The shield semiconductors layer can play all the effect of pressing, and can avoid week upwards producing voltage difference, the safety in utilization of raising cable on the surface of the outer peripheral face of inner covering and insulating barrier.
Said inner covering 1 is all processed by crosslinked polyethylene with insulating barrier 4.Crosslinked polyethylene have thermal endurance, corrosion resistance and resistance to pressure good, can be arbitrarily crooked and can embrittlement, characteristics such as creep strength height, make cable have to be prone to install and in light weight, good in thermal property, advantage such as the permission working temperature is high, transmission capacity is big, reliability is high, failure rate is low.
Scribble one deck silica gel on the surface of said conductor 2.Electric pressure according to cable on the surface of said conductor 2 requires to polish smooth, must not be jagged, scribble one deck silica gel on the surfaces externally and internally of conductor.Said silica gel layer helps protecting conductor and is beneficial to conduction, slows down the conductor oxidation simultaneously.Expansion can be saved silica gel layer when cable is used as low-voltage cable.
The hole enlargement cable also is provided with end-fitting, and said end-fitting comprises chock 9 and sleeve part 8; The end that said sleeve part 8 is connected with cable is a cylindrical shape, and the other end of said sleeve part 8 is the plate body that is provided with screw 81; Said chock 9 is a solid cylinder.When cable end need be connected with equipment; At first the inner covering in the conductor is used the specific purpose tool hollow out, the chock 9 of solid cylindrical is filled in the conductor of hollow out inner covering, outside each layer of strip off cable conductor exposes conductor then; Cylinder end with sleeve part is enclosed within on the conductor again; Compress with the cylinder end of hydraulic tongs with sleeve part, make chock, conductor and sleeve part press together tightly, the other end is that the plate body that is provided with screw 81 uses bolt can realize easily that cable is connected with equipment.
Said screen 5 is formed by the copper band; Said internal shield is processed by semi-conducting material.Said screen 5 is that one deck twines copper sheet.
When the hole enlargement cable of the utility model was installed, cable end need be provided with end-fitting (like Fig. 3～shown in Figure 7), so that cable is connected with equipment.An end that is connected with cable of the sleeve part 8 of said end-fitting is a cylindrical shape, and the other end of sleeve part 8 is the plate body that is provided with screw 81.When cable end need be connected with equipment; At first the inner covering in the conductor is used the specific purpose tool hollow out, the chock 9 of solid cylindrical is filled in the conductor of hollow out inner covering, outside each layer of strip off cable conductor exposes conductor then; Cylinder end with sleeve part is enclosed within on the conductor again; Compress with the sleeve part of hydraulic pressure pliers, make chock, conductor and sleeve part press together tightly end-fitting, thereby with end-fitting and cable link together tightly (as shown in Figure 7).Through the screw on the end-fitting, end-fitting is connected with equipment.
When the hole enlargement cable is installed, also usually need two hole enlargement cables be continued mutually, just transition joint 10 need be set in the centre of two cables.Transition joint 10 cylindrical (as shown in Figure 8).Like Fig. 8～Figure 10, when connecting transition joint 10, when cable need continue, at first the inner covering in the conductor is used the specific purpose tool hollow out; The chock 9 of solid cylindrical is filled in the conductor of hollow out inner covering; Outside each layer of strip off cable conductor exposes conductor then, transition joint 10 is enclosed within on the conductor again, and insert respectively within the conductor of two cables at the two ends of chock; The two ends of transition joint are enclosed within on the conductor of two cables; Compress with the two ends of hydraulic tongs, make chock 9, conductor 1 and transition joint 10 press together tightly, recover outer layer segments such as shielding, insulation and protection then the columnar transition joint 10 of sleeve part.The chock of transition joint 10 is identical with the chock of end-fitting 9 diameters, but length is about 2 times of length of the chock of end-fitting.
Claims (5)
1. the hole enlargement cable comprises conductor (2), insulating barrier (3), inner sheath (4), screen (5) and oversheath (7), it is characterized in that the cross section of said conductor (2) is the C font; In the cavity in the said conductor (2) is inner covering (1), and said inner covering (1) is the filling insulating material thing; The hole enlargement cable is followed successively by from the inside to the outside: inner covering (1), conductor (2), insulating barrier (3), inner sheath (4), screen (5), metal armouring layer (6) and oversheath (7).
2. hole enlargement cable according to claim 1 is characterized in that, the outer peripheral face of said inner covering (1) is provided with the shield semiconductors layer; Be provided with the shield semiconductors layer on the outer peripheral face of said insulating barrier (4) and on the inner peripheral surface of said insulating barrier (4).
3. hole enlargement cable according to claim 1 is characterized in that, said inner covering (1) and insulating barrier (4) are all processed by crosslinked polyethylene.
4. hole enlargement cable according to claim 1 is characterized in that, scribbles one deck silica gel on the surface of said conductor (2).
5. hole enlargement cable according to claim 1 is characterized in that, also is provided with end-fitting, and said end-fitting comprises chock (9) and sleeve part (8); The end that said sleeve part (8) is connected with cable is a cylindrical shape, and the other end of said sleeve part (8) is for being provided with the plate body of screw (81); Said chock (9) is a solid cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203585023U CN202196611U (en) | 2011-09-22 | 2011-09-22 | Hole enlargement cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203585023U CN202196611U (en) | 2011-09-22 | 2011-09-22 | Hole enlargement cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202196611U true CN202196611U (en) | 2012-04-18 |
Family
ID=45951513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203585023U Expired - Lifetime CN202196611U (en) | 2011-09-22 | 2011-09-22 | Hole enlargement cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202196611U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354569A (en) * | 2011-09-22 | 2012-02-15 | 安徽省电力公司合肥供电公司 | Diameter-expanding cable |
-
2011
- 2011-09-22 CN CN2011203585023U patent/CN202196611U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354569A (en) * | 2011-09-22 | 2012-02-15 | 安徽省电力公司合肥供电公司 | Diameter-expanding cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120418 |
|
| CX01 | Expiry of patent term |