Energy-saving consumption-reducing monofilament mixed stranded cable conductor

Abstract

The utility model relates to the technical field of cable conductors, in particular to an energy-saving consumption-reducing monofilament mixed stranded cable conductor, which comprises a conductor, the conductor comprises a plurality of buckle type special-shaped monofilaments and a plurality of circular monofilaments, the cross section of each circular monofilament is circular, and the buckle type special-shaped monofilaments are interlocked and meshed. The utility model has the following advantages: (1) buckle type special-shaped monofilaments and round monofilaments with specific specifications are produced, the number of filaments is small, the number of times of wire drawing and die changing is small, the production efficiency can reach the round monofilament wire drawing capacity and production efficiency on the premise that two wire drawing machines are matched, the capacity is high, the requirement on equipment is low, and the requirement on the operating skill of workers is not high; and (2) low-oxygen copper and oxygen-free copper are adopted, only the inner-layer circular monofilament needs to be replaced when the resistor richness is too large or too small, the inner-layer circular monofilament is easy to repair, the later-period out-of-period problems are few, the after-sale cost is reduced, and copper material consumption can be saved to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the technical field of cable conductors, in particular to an energy-saving and consumption-reducing single-filament mixed twisted cable conductor. Background Art

[0002] According to national standards and equipment technical conditions, traditional cable structures are generally divided into three types of structural conductors (non-compacted type, compacted type, and full-type wire). Each structure has its own advantages and disadvantages, and it is difficult to meet a variety of requirements at the same time.

[0003] The first type of non-compacted conductor has no surface deformation after compression by the mold. The advantages are: good conductor resistance, simple operation, low cost, good bending, and easy repair of defects in the middle. The disadvantages are: not suitable for voltages above medium voltage, and the conductor has great limitations; the conductor surface is uneven, and the outer diameter of the conductor is too large; the insulation material is seriously sunken, resulting in a lot of insulation material waste; when there are multiple center wires, the conductor is not round and the compression coefficient is low.

[0004] The second type of compacted conductor, after the conductor surface is compacted by the mold, the conductor single wire is severely plastically deformed. The advantages are: it is suitable for medium and low voltage insulated cable conductors, it is versatile, and the number of single wires is small. There are the following disadvantages: after the conductor surface is compacted by the mold, the conductor single wire is severely plastically deformed, the equipment consumes a lot of energy, the conductor resistance is poor, the raw materials are wasted, the material requirements are high, and the market competition is insufficient.

[0005] The third type of full-line conductor has the following advantages: smooth conductor surface, small outer diameter, good resistance, low cost, suitable for medium voltage conductor, and great competitive advantage. However, it has the following disadvantages: the conductor is relatively hard and has large bends; the structure is complex, production scheduling is difficult, and production capacity is low; it requires high operating skills of workers and equipment, is difficult to repair in the middle, and has many problems in the later period, resulting in high after-sales costs. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and proposes an energy-saving and consumption-reducing single-filament mixed twisted cable conductor.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A energy-saving and consumption-reducing monofilament hybrid twisted cable conductor is designed, comprising a conductor, wherein the conductor comprises a plurality of buckle-type special-shaped monofilaments and a plurality of round monofilaments, the cross-sections of the plurality of round monofilaments are all round, and the plurality of buckle-type special-shaped monofilaments are all interlocked and bitten.

[0009] Preferably, a plurality of the buckle-shaped special-shaped monofilaments are formed by cold drawing at one time by a die or by extrusion by a die.

[0010] Preferably, the plurality of round monofilaments are twisted separately or twisted into shape at one time.

[0011] Preferably, the ratio of the cross-sectional area of ​​the plurality of circular monofilaments as a whole to the cross-sectional area of ​​the conductor is greater than 90%.

[0012] Preferably, the cross-sectional shape of the buckle-type special-shaped monofilament is U-shaped, V-shaped, Z-shaped or S-shaped.

[0013] Preferably, the conductor is copper, copper alloy, aluminum or aluminum alloy.

[0014] Preferably, the conductor cross-section specification is 16mm 2 , 25mm 2 、35mm 2 , 50mm 2 、70mm 2 、95mm 2 , 120mm 2 , 150mm 2 、185mm 2 , 240mm 2 、300mm 2 , 400mm 2 , 500mm 2 、630mm 2 , 800mm 2 .

[0015] Preferably, the cross-sectional area specification is 300mm 2 The conductors described below are composed of a single layer of multiple buckle-type special-shaped monofilaments and multiple round monofilaments twisted together, with a cross-sectional area greater than 300mm 2 The conductor is composed of a double layer of multiple buckle-type special-shaped monofilaments and multiple round monofilaments twisted together.

[0016] Preferably, the cross-sectional shapes of the multiple circular monofilaments are all circular, the multiple circular monofilaments are twisted and arranged, the circular monofilaments are arranged at the center of the conductor, the number of the circular monofilaments in the twisted layer close to the center of the conductor is 6, and the number of adjacent outer twisted layers increases by 6 successively.

[0017] The utility model proposes an energy-saving and consumption-reducing single-filament mixed twisted cable conductor, which has the following beneficial effects: the energy-saving and consumption-reducing mixed twisted cable conductor has been modified for the advantages and disadvantages of the above three cable structures in the prior art, and has been proved by multiple design modifications, theoretical calculations and practical production application data to meet the national standard requirements GB / T 3956-2008 and the corresponding international standard IEC 60228; 2004 specification of the second conductor structure, and comprehensively combines the advantages of the other three structures to remove the defects of the other three conductor structures. And the specific advantages are as follows:

[0018] (1) To produce clip-on shaped monofilaments and round monofilaments of specific specifications, with fewer wire numbers and fewer die changes. With the cooperation of two wire drawing machines, the production efficiency can reach the production capacity and efficiency of round monofilament drawing. It has high production capacity, low requirements for equipment, and low requirements for workers' operating skills.

[0019] (2) If the resistance surplus of low-oxygen copper and oxygen-free copper is too large or too small, only the inner round monofilament needs to be replaced. The inner round monofilament is easy to repair and has fewer problems in the later period, which reduces after-sales costs and can save copper consumption to the maximum extent.

[0020] (3) The outer diameter of the conductor fully complies with the minimum and maximum outer diameter requirements of Appendix C2 of GB / T3956-2008 and meets the technical specifications of the Southern Power Grid. Multiple buckle-type special-shaped monofilaments are interlocked and bite. The outer diameter size is stable, the surface is smooth and round, the compression coefficient is high, and the eccentricity value is stable when the three-layer co-extruded insulation is used.

[0021] (4) Since the inner and outer monofilaments of the full-line cable conductor are formed by one-time cold drawing or extrusion of the die, the bending radius of the conductor of the utility model is smaller than that of the full-line conductor, and the finished cable has good flexibility. The bending radius of the conductor meets the application conditions of various fixed laying projects, and the expansion and contraction phenomenon of the conductor relative to the insulation layer is basically eliminated.

[0022] (5) Multiple buckle-type special-shaped monofilaments are interlocked and bite together to solve the problem of shielding inward collapse of low, medium and high voltage non-compact cables. The conductor shielding material can be saved by 2%-5%. At the same time, it also saves conductor insulation material. It can be used for voltages above medium voltage. The wire has a wide range of applications. The conductor can be made of many conductive metals and has high market competitiveness.

[0023] (6) Under the premise of the same quality material, the cross-sections of multiple circular monofilaments are all circular, which reduces the serious plastic deformation of the conductor monofilaments, reduces the energy consumption of the equipment, and saves 1%-2.5% of the copper conductor material consumption compared with the compressed conductor structure, thus saving raw materials.

[0024] (7) The process of the utility model is common to the process of medium and low voltage power cable conductors, and is particularly suitable for small and medium-sized cable companies that frequently change conductor specifications.

[0025] (8) The conductor of the utility model is composed of a plurality of buckle-type special-shaped monofilaments and a plurality of round monofilaments, and the cross-sections of the plurality of round monofilaments are all round, the structure is simple, and the production scheduling is simple, the operator's skill requirements are reduced, the production efficiency is improved, the product retraction and release line is stable, the gap between the three-layer co-extrusion molds is small, and it is not easy to get stuck in the mold inside the cross-linking machine.

[0026] (9) Since the cross-sections of the plurality of circular monofilaments are all circular and the plurality of buckle-shaped special-shaped monofilaments are interlocked and bitten, the discharge value of the conductor of the utility model in the cable partial discharge test is smaller than that of the ordinary cable conductor, the withstand voltage level is improved, and the service life of the cable is extended.

[0027] (10) The buckle-type special-shaped single wires of the utility model are interlocked and bite each other, and the cable conductor meets the skin effect characteristics during AC power transmission operation. The AC resistance of the cable conductor is smaller than that of ordinary process conductors, reducing the cable operation loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the first non-compact conductor end face structure in the prior art;

[0029] Figure 2 It is a schematic diagram of the second type of compact conductor end surface structure in the prior art;

[0030] Figure 3 It is a schematic diagram of the end surface structure of the third full-type wire conductor in the prior art;

[0031] Figure 4 This is a schematic diagram of the end surface structure of the U-shaped twisted conductor of the buckle-type special-shaped monofilament of the utility model;

[0032] Figure 5 This is a schematic diagram of the end surface structure of the V-shaped stranded conductor of the buckle-type special-shaped monofilament of the utility model;

[0033] Figure 6 This is a schematic diagram of the end surface structure of the Z-shaped stranded conductor of the buckle-type special-shaped monofilament of the utility model;

[0034] Figure 7 This is a schematic diagram of the end surface structure of the S-shaped stranded conductor of the buckle-type special-shaped monofilament of the utility model;

[0035] Figure 8 It is a schematic diagram of the end face structure of the double-layer clip-on special-shaped single-filament twisted conductor of the utility model.

[0036] In the figure: buckle-type special-shaped monofilament 1, round monofilament 2. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0038] According to national standards and equipment technical conditions, the traditional cable structure is generally divided into three types of structural conductors: the first type is non-compacted conductors, such as Figure 1 ; The second type of compact conductor, such as Figure 2; The third type of full-line conductor, such as Figure 3 .

[0039] Reference Figure 4-8 A energy-saving and consumption-reducing monofilament mixed twisted cable conductor includes a conductor, wherein the conductor includes a plurality of snap-on special-shaped monofilaments 1 and a plurality of round monofilaments 2, wherein the cross-sections of the plurality of round monofilaments 2 are all round, and the plurality of snap-on special-shaped monofilaments 1 are all interlocked and bitten to ensure that the snap-on special-shaped monofilaments 1 are tightly connected.

[0040] A plurality of buckle-shaped special-shaped monofilaments 1 are formed by cold drawing at one time through a die or by extrusion through a die.

[0041] The plurality of round monofilaments 2 are twisted separately or twisted at once to form a shape, which is determined by the size of the equipment.

[0042] The ratio of the cross-sectional area of ​​the plurality of round monofilaments 2 as a whole to the cross-sectional area of ​​the conductor is greater than 90%.

[0043] Conductor cross-section specification is 16mm 2 , 25mm 2 、35mm 2 , 50mm 2 , 70mm 2 、95mm 2 , 120mm 2 , 150mm 2 、185mm 2 , 240mm 2 、300mm 2 , 400mm 2 , 500mm 2 、630mm 2 , 800mm 2 .

[0044] The cross-sectional shape of the multiple circular monofilaments 2 is circular, and the multiple circular monofilaments 2 are twisted and arranged, and the circular monofilaments 2 are arranged in the center of the conductor. The number of circular monofilaments 2 in the twisted layer close to the center of the conductor is 6, and the number of adjacent outer twisted layers increases by 6 successively, and so on, 1+6+12+18+24... and so on. The specific number is determined by the standard specifications of the cable.

[0045] First embodiment:

[0046] Reference Figure 4 The cross-sectional shape of the buckle-type special-shaped monofilament 1 is U-shaped.

[0047] Second embodiment:

[0048] Reference Figure 5 The cross-sectional shape of the buckle-type special-shaped monofilament 1 is V-shaped.

[0049] Third embodiment:

[0050] Reference Figure 6 The cross-sectional shape of the buckle-type special-shaped monofilament 1 is Z-shaped.

[0051] Fourth embodiment:

[0052] Reference Figure 7 The cross-sectional shape of the buckle-type special-shaped monofilament 1 is S-shaped.

[0053] Fifth embodiment:

[0054] Reference Figure 4-7 , cross-sectional area specification is 300mm 2 The following conductor is composed of a single layer of multiple clip-on special-shaped monofilaments 1 and multiple round monofilaments 2 twisted together.

[0055] Sixth embodiment:

[0056] Reference Figure 8 , larger than the cross-sectional area specification of 300mm 2 The conductor is composed of a double layer of a plurality of buckle-type special-shaped monofilaments 1 and a plurality of round monofilaments 2 twisted together.

[0057] Aiming at the advantages and disadvantages of the above three cable structures in the existing technology, the energy-saving and consumption-reducing twisted cable conductor has been modified for many times, and the theoretical calculation and practical production application data have proved that it meets the national standard requirements GB / T 3956-2008 and the corresponding international standard IEC 60228; 2004 specification of the second conductor structure, comprehensively combines the advantages of the other three structures, and eliminates the defects of the other three conductor structures. And the specific advantages are as follows:

[0058] (1) To produce clip-on shaped monofilaments 1 and round monofilaments 2 of specific specifications, with fewer wire numbers and fewer die changes, the production efficiency can reach the round monofilament drawing capacity and production efficiency under the premise of cooperation of two wire drawing machines, with high production capacity, low requirements on equipment, and low requirements on workers' operating skills.

[0059] (2) If the resistance surplus of low-oxygen copper and oxygen-free copper is too large or too small, only the inner round monofilament 2 needs to be replaced. The inner round monofilament 2 is easy to repair, has few problems in the later period, reduces after-sales costs, and can save copper consumption to the maximum extent.

[0060] (3) The outer diameter of the conductor fully complies with the minimum and maximum outer diameter requirements of Appendix C2 of GB / T3956-2008 and meets the technical specifications of the Southern Power Grid. Multiple buckle-type special-shaped monofilaments 1 are interlocked and bite. The outer diameter size is stable, the surface is smooth and round, the compression coefficient is high, and the eccentricity value is stable when the three-layer co-extruded insulation is used.

[0061] (4) Since the inner and outer monofilaments of the full-type cable conductor are formed by one-time cold drawing or extrusion of the die, the bending radius of the conductor of the utility model is smaller than that of the full-type conductor, and the finished cable has good flexibility. The bending radius of the conductor meets the application conditions of various fixed laying projects, and the expansion and contraction phenomenon of the conductor relative to the insulation layer is basically eliminated.

[0062] (5) Multiple buckle-type special-shaped monofilaments 1 are interlocked and bite each other, which solves the problem of shielding inward collapse of the first type of non-compacted cables with low, medium and high voltages, and can save 2%-5% of conductor shielding materials; at the same time, it also saves conductor insulation materials, and can be applied to voltages above medium voltage. The wire has a wide range of applications, and the conductor can be made of many conductive metals, such as copper, copper alloy, aluminum or aluminum alloy, and the market competition is high.

[0063] (6) Under the premise of the same quality material, the cross-sections of the multiple circular monofilaments 2 are all circular, which reduces the serious plastic deformation of the conductor monofilaments, reduces the energy consumption of the equipment, and saves 1%-2.5% of the copper conductor material consumption compared with the compressed conductor structure, thus saving raw materials.

[0064] (7) The process of the utility model is common to the process of medium and low voltage power cable conductors, and is particularly suitable for small and medium-sized cable companies that frequently change conductor specifications.

[0065] (8) The conductor of the utility model is composed of a plurality of buckle-type special-shaped monofilaments 1 and a plurality of round monofilaments 2, and the cross-sections of the plurality of round monofilaments are all round, the structure is simple, and the production scheduling is simple, the operator's skill requirements are reduced, the production efficiency is improved, the product retraction and release line is stable, the gap between the three-layer co-extrusion molds is small, and it is not easy to get stuck in the mold inside the cross-linking machine.

[0066] (9) Since the cross-sections of the plurality of circular monofilaments 2 are all circular and the plurality of buckle-shaped special-shaped monofilaments 1 are all interlocked and bitten, the discharge value of the conductor of the utility model in the cable partial discharge test is smaller than that of the ordinary cable conductor, the withstand voltage level is improved, and the service life of the cable is extended.

[0067] (10) The buckle-type special-shaped single wires 1 of the utility model are interlocked and bite each other, and the cable conductor meets the skin effect characteristics during AC power transmission operation. The AC resistance of the cable conductor is smaller than that of ordinary process conductors, thereby reducing the cable operation loss.

[0068] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An energy-saving and consumption-reducing monofilament hybrid twisted cable conductor, comprising a conductor, characterized in that: The conductor comprises a plurality of buckle-type special-shaped monofilaments (1) and a plurality of round monofilaments (2), the cross-sections of the plurality of round monofilaments (2) are all round, and the plurality of buckle-type special-shaped monofilaments (1) are all interlocked and bitten.

2. The energy-saving and consumption-reducing monofilament hybrid twisted cable conductor according to claim 1, characterized in that: The plurality of buckle-shaped special-shaped monofilaments (1) are formed by cold drawing at one time by a die or by extrusion by a die.

3. The energy-saving and consumption-reducing monofilament hybrid twisted cable conductor according to claim 1, characterized in that: A plurality of the round monofilaments (2) are twisted separately or twisted into shape at one time.

4. The energy-saving and consumption-reducing monofilament hybrid twisted cable conductor according to claim 1, characterized in that: The ratio of the cross-sectional area of ​​the plurality of circular monofilaments (2) as a whole to the cross-sectional area of ​​the conductor is greater than 90%.

5. The energy-saving and consumption-reducing monofilament hybrid twisted cable conductor according to claim 1, characterized in that: The cross-sectional shape of the buckle-type special-shaped monofilament (1) is U-shaped, V-shaped, Z-shaped or S-shaped.

6. The energy-saving and consumption-reducing monofilament hybrid twisted cable conductor according to claim 1, characterized in that: The conductor is copper, copper alloy, aluminum or aluminum alloy.

7. The energy-saving and consumption-reducing monofilament hybrid twisted cable conductor according to claim 1, characterized in that: The conductor cross-section specification is 16mm 2 , 25mm 2 , 35mm 2 , 50mm 2 、70mm 2 、95mm 2 , 120mm 2 , 150mm 2 、185mm 2 , 240mm 2 、300mm 2 , 400mm 2 , 500mm 2 、630mm 2 , 800mm 2 .

8. The energy-saving and consumption-reducing monofilament hybrid twisted cable conductor according to claim 1, characterized in that: The cross-sectional area is 300mm 2 The conductor described below is composed of a single layer of multiple buckle-shaped monofilaments (1) and multiple round monofilaments (2) twisted together, and the cross-sectional area specification is greater than 300mm 2 The conductor is composed of a double layer of multiple buckle-type special-shaped monofilaments (1) and multiple round monofilaments (2) twisted together.

9. The energy-saving and consumption-reducing monofilament hybrid twisted cable conductor according to claim 1, characterized in that: The cross-sectional shapes of the plurality of circular monofilaments (2) are all circular, and the plurality of circular monofilaments (2) are twisted and arranged, and the circular monofilaments (2) are arranged at the center of the conductor, and the number of the circular monofilaments (2) in the twisted layer close to the center of the conductor is 6, and the number of adjacent outer twisted layers increases by 6 in sequence.

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