CN217767867U - High-speed moving festoon cable - Google Patents
High-speed moving festoon cable Download PDFInfo
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- CN217767867U CN217767867U CN202220861990.8U CN202220861990U CN217767867U CN 217767867 U CN217767867 U CN 217767867U CN 202220861990 U CN202220861990 U CN 202220861990U CN 217767867 U CN217767867 U CN 217767867U
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Abstract
The outer diameter of the high-speed moving festoon cable is 19.0 mm-23.0 mm; the cable is a cable core formed by twisting a plurality of wire cores; the cable core is filled with cable core filling formed by a rubber strip and a fiber braided fabric; the cable core is sequentially coated with a second wrapping layer and an outer sheath from inside to outside; the filling of the cable core is strip-shaped material which is formed by extruding rubber insulating material outside the fiber braided fabric and has a circular section; the structure of each wire core is as follows: the cable core conductor, the first wrapping layer and the insulating layer are arranged from inside to outside in sequence; each wire core is symmetrical around the axis of the cable; the core conductor is formed by bundling and synthesizing single stranded wires by tin-plated round copper wire monofilaments and then twisting a plurality of stranded wires; the wrapping tape of the first wrapping layer is a reinforced non-woven fabric wrapping tape; the insulating layer is made of ethylene propylene rubber insulating material; the wrapping tape of the second wrapping layer is a non-woven fabric wrapping tape; the outer sheath is made of chlorinated polyethylene sheath material. The cable with the structure can be used in the dragging occasion with high-speed movement.
Description
Technical Field
The technical scheme belongs to the technical field of cables, and particularly relates to a high-speed moving festoon cable.
Background
In recent years, chinese industrial finished products play a positive role in helping more countries to perfect infrastructure, strengthen an industry matching system, improve resident life and the like. In the industrial fields of energy, electric power, petrifaction, metallurgy, shipbuilding, traffic and the like, hoisting and transporting equipment cannot be removed.
The development of the crane transport (material handling) machinery manufacturing industry requires power transmission, signal transmission for the festoon system, to control the crane, hoist or any lateral movement equipment, the cable supplying power to these equipment and transmitting signal commands is the festoon cable.
The towing cable is usually suspended, and has high performance requirements, such as softness, bending resistance (fast and frequent bending speed), long reciprocating distance and the like. The moving speed of the conventional towing cable is within 30m/min, and the performance requirement of the cable is higher by the high-speed towing cable with the maximum moving speed of 240 m/min.
Disclosure of Invention
In order to meet the requirements of the prior art on the festoon cable, the invention provides a high-speed moving festoon cable, which has the following structure: the outer diameter range of the cable is 19.0 mm-23.0 mm;
the cable is a cable core formed by twisting a plurality of wire cores; the cable core is filled with cable core filler formed by a rubber strip and fiber braided fabric; the cable core is sequentially coated with a second wrapping layer and an outer sheath from inside to outside; the stranding pitch diameter ratio of the cable core is less than 10 times;
the cable core filling is a strip material which is formed by extruding rubber insulating materials outside the fiber braided fabric and has a circular section, and the diameter range of the cable core filling is 1.0-1.2 mm;
the structure of each wire core is as follows: the cable core conductor, the first wrapping layer and the insulating layer are arranged from inside to outside in sequence; each wire core is symmetrical around the axis of the cable;
the core conductor is formed by bundling and synthesizing single stranded wires by tin-plated round copper wire monofilaments and then twisting a plurality of stranded wires; the bunching direction of the folded yarn is left, and the bunching pitch ratio of the folded yarn is controlled to be 20-25; the twisting direction of the compound twisting is left direction, the twisting pitch diameter ratio of the compound twisting of the inner layer is controlled to be 15-20, and the twisting pitch diameter ratio of the compound twisting of the outer layer is controlled to be 10-12; the diameter range of the tinned round copper wire monofilament is as follows: 0.397-0.400 mm; diameter range of conductor: 5.3 mm-5.9 mm.
The cable has the advantages that the scheme of the conductor with more conductors and smaller monofilament diameter is adopted, the pitch-diameter ratio of the conductor is smaller, the bunching and compound twisting directions of the conductor are kept consistent, the flexibility and bending resistance of the conductor are better, and the flexibility and bending resistance of the cable are better.
The wrapping tape of the first wrapping layer is reinforced non-woven fabric wrapping tape with longitudinal tensile strength greater than 45N/mm 2 The longitudinal elongation at break is more than 45%, the lapping direction is opposite to the compound twisting direction of the conductor of the core, the nominal thickness range of the lapping tape is 0.13-0.19 mm, the width is 24-36 mm, and the width of the lapping cover of the lapping tape is not less than 5mm;
the special tensile strength performance and overlapping cover of the wrapping tape prevent the insulating material from being embedded into conductor gaps due to extrusion production in the manufacturing process of the insulating layer, and can also prevent the conductor from loosening and improve the stability of the conductor structure;
the insulating layer is made of ethylene propylene rubber insulating material, the average thickness control range of the insulating layer is 0.7 mm-0.9 mm, and the thickness of the thinnest part is not less than 0.53mm;
before aging, the tensile strength of the insulating layer is more than 7.0Mpa, and the elongation at break is more than 350%; under the condition of ensuring good low-temperature performance and good flexibility, the elongation at break of the insulating material is still good, and the flexibility and bending resistance of the cable are improved;
the lapping tape of the second lapping layer is a non-woven fabric lapping tape, the lapping direction is opposite to the stranding direction of the wire cores, the nominal thickness of the lapping tape is 0.16-0.24 mm, the width of the lapping tape is 24-36 mm, the average overlapping rate of the lapping tape is not less than 30%, and the minimum overlapping rate of the lapping tape is not less than 20%; the longitudinal tensile strength of the wrapping tape is more than 50N/mm 2 And the longitudinal elongation at break is greater than 10%.
The specific width and the average overlapping rate of the lapping tape can ensure that the width of the lapping cover is not less than 5mm; the roundness of the cable is improved, and the stability of the cable core is ensured;
the outer sheath is made of chlorinated polyethylene sheath materials, the average thickness control range of the outer sheath is 2.1 mm-2.2 mm, and the thickness of the thinnest part is larger than 1.56mm.
Before aging, the outer sheath has tensile strength higher than 15.0MPa and elongation at break higher than 400%.
Preferably, the cable has the structure that:
the diameter of the filling of the cable core is 1.2mm, and the fiber of the fiber braided fabric is aramid fiber yarn with the specification of 1100 dtex.
The breaking strength of the aramid fiber yarn can reach 223N, and the tensile strength is extremely high; the elastic rubber strip is arranged at the center of the soft rubber strip and used as the place where the whole cable is maximum in tensile resistance, so that the tensile strength of the cable is improved, the rounding degree of the cable is also ensured, and the bending resistance of the cable is improved.
The outer diameter of the cable is 20.6mm;
the stranding pitch diameter ratio of the cable core is 9 times;
in the core conductor: the bunching pitch ratio of the folded yarn is 22 times; the twisting pitch diameter ratio of the inner layer compound twisting is 17 times, and the twisting pitch diameter ratio of the outer layer compound twisting is 10 times; the diameter of the tin-plated round copper wire monofilament is 0.398mm; the diameter of the conductor is 5.6mm.
The nominal thickness of the wrapping tape of the first wrapping layer is 0.16mm, the width of the wrapping tape is 30mm, the width of the wrapping cover of the wrapping tape is 7mm, and the cover overlapping rate is 23%;
the insulating layer is made of ethylene propylene rubber insulating material, and the average thickness of the insulating layer is 0.8mm
The second is 0.2mm around the nominal thickness of the package area of covering, and the width is 30mm, and the overlap ratio of package area is 6mm, takes to cover the overlap ratio 20%.
The thickness of the outer sheath is an average thickness of 2.2mm and the thinnest point thickness is 1.96mm.
The conductor scheme with more conductors and smaller monofilament diameter is adopted, the pitch-diameter ratio of the conductor is smaller, the bunching and compound twisting directions of the conductor are kept consistent, the flexibility and bending resistance of the conductor are better, and the flexibility and bending resistance of the cable are better.
The insulating material has high tensile strength, good elongation at break and good flexibility, and improves the bending resistance of the cable; the insulating property is good, and equal voltage class rubber insulation cable, insulation thickness attenuate 0.3mm to reduce the whole external diameter of cable, reduced the whole weight of removal cable.
On the premise of ensuring the mechanical strength of the cable, the pitch diameter ratio of the cable core is small, and the bending resistance of the cable is improved by the cable core.
The sheath material has excellent tensile strength and elongation at break performance, better oil resistance, wear resistance and other performances, and meets the requirement of the mobile cable on the sheath in long-term mobile use by combining with specific thickness.
Compared with the prior art, the cable with the structure can be used in the occasion of festoon which can move at high speed, and the cable structure is softer and bending-resistant on the premise of meeting the performance requirements of ozone resistance, hot oil resistance, flame retardance and the like, is suitable for festoon systems which move at high speed, and can also be used in places with limited space or places with extremely high relative bending requirements.
Drawings
FIG. 1 is a schematic radial cross-sectional view of the present cable;
in the figure: sinle silk conductor 1, first around covering 2, insulating layer 3, cable core packing 4, second around covering 5, oversheath 6.
Detailed Description
The technical scheme is further explained by combining the drawings and the detailed implementation mode as follows:
referring to fig. 1, the structure of the high-speed moving festoon cable of this embodiment is: the outer diameter range of the cable is 19.0 mm-23.0 mm;
the cable is a cable core formed by stranding a plurality of (3 in this example) wire cores; the cable core is filled with cable core filler 4 formed by a rubber strip and fiber braided fabric; the cable core is sequentially coated with a second wrapping layer and an outer sheath from inside to outside; the stranding pitch diameter ratio of the cable core is less than 10 times;
the cable core filling is a strip material which is formed by extruding rubber insulating materials (XJ-30E insulating materials in the example) outside the fiber braided fabric and has a circular section, and the diameter range of the cable core filling is 1.0-1.2 mm;
the structure of each wire core is as follows: the cable core conductor 1, the first wrapping layer 2 and the insulating layer 3 are arranged from inside to outside in sequence; each wire core is symmetrical around the axis of the cable;
the wire core conductor 1 is formed by bundling and combining single stranded wires of tinned round copper wires and then twisting a plurality of stranded wires; the bunching direction of the folded yarns is the left direction, and the bunching pitch ratio of the folded yarns is controlled to be 20-25; the twisting direction of the compound twisting is left direction, the twisting pitch diameter ratio of the compound twisting of the inner layer is controlled to be 15-20, and the twisting pitch diameter ratio of the compound twisting of the outer layer is controlled to be 10-12; the diameter range of the tinned round copper wire monofilament is as follows: 0.397-0.400 mm; diameter range of conductor: 5.3 mm-5.9 mm.
During processing, the single yarn bundles are firstly synthesized into the strands, and then the strands are twisted to obtain the conductor. During twisting, each strand is divided into a plurality of layers from inside to outside, each layer of strand is twisted independently, the twisting pitch-diameter ratio is different, the twisting pitch-diameter ratio of the innermost layer of strand is controlled to be larger, the twisting pitch-diameter ratio of the outermost layer of strand is smaller, and the pitch-diameter ratios of the layers between the inner layer of strand and the outer layer of strand are reduced in sequence.
The wrapping tape of the first wrapping layer 2 is a reinforced non-woven fabric wrapping tape with the longitudinal tensile strength larger than 45N/mm 2 The longitudinal elongation at break is more than 45%, the lapping direction is opposite to the compound twisting direction of the conductor of the core, the nominal thickness range of the lapping tape is 0.13-0.19 mm, the width is 24-36 mm, and the width of the lapping cover of the lapping tape is not less than 5mm;
the insulating layer 5 is made of ethylene propylene rubber insulating material (the embodiment adopts low-voltage marine ethylene propylene insulating material/XJ-30A (lead-free)), the average thickness control range of the insulating layer is 0.7 mm-0.9 mm, and the thickness of the thinnest part is not less than 0.53mm;
the wrapping tape of the second wrapping layer 4 is a non-woven fabric wrapping tape, the wrapping direction is opposite to the twisting direction of the wire cores, the nominal thickness of the wrapping tape is 0.16-0.24 mm, the width of the wrapping tape is 24-36 mm, the average overlapping rate of the wrapping tape is not less than 30%, and the minimum overlapping rate is not less than 20%;
the outer sheath 6 is made of chlorinated polyethylene sheath material (chlorosulfonated polyethylene sheath material/XH-21B in the present example), the average thickness of the outer sheath is controlled within the range of 2.1-2.2 mm, and the thickness of the thinnest part is not less than 1.56mm.
In this example:
the outer diameter of the cable is 20.6mm;
the diameter of the cable core filling is 1.2mm, and the fiber of the fiber braided fabric is aramid fiber yarn with the specification of 1100 dtex;
the stranding pitch diameter ratio of the cable core is 9 times;
in the core conductor: the bunching pitch ratio of the folded yarn is 22 times; the twisting pitch diameter ratio of the inner layer compound twisting is 17 times, and the twisting pitch diameter ratio of the outer layer compound twisting is 10 times; the diameter of the tinned round copper wire monofilament is 0.398; the diameter of the conductor is 5.6mm.
The nominal thickness of the wrapping tape of the first wrapping layer is 0.16mm, the width of the wrapping tape is 30mm, the width of the wrapping cover of the wrapping tape is 7mm, and the cover overlapping rate is 23%;
the average thickness of the insulating layer was 0.8mm
The nominal thickness of the wrapping tape of the second wrapping layer is 0.2mm, the width of the wrapping tape is 30mm, and the overlapping rate of the wrapping tape is 20 percent
The average thickness of the outer sheath was 2.2mm and the thinnest point was 1.96mm.
After detection, the performance parameters of the cable of the embodiment are as follows:
1. insulating thermal extension: 250 ℃,15min,20N/cm 2 The condition was that the maximum elongation under load was 175% and the maximum permanent elongation after cooling was 15%.
2. Mechanical properties before and after insulation aging: tensile strength before aging of not less than 4.2N/mm 2 Elongation at break not less than 200%; after aging for 168 hours at 135 ℃, the change rate of the tensile strength is +/-30 percent at most, and the change rate of the elongation at break is +/-30 percent at most.
3. Sheath thermal extension: 200 ℃,15min,20N/cm 2 The condition, maximum elongation under load 175%, maximum permanent elongation after cooling 15%.
4. Mechanical properties before and after jacket aging: tensile strength before aging of not less than 10N/mm 2 The elongation at break is not less than 300%; after aging for 168 hours at 100 ℃, the maximum change rate of the tensile strength is +/-30%, the elongation at break is not less than 250%, and the maximum change rate of the elongation at break is +/-40%.
5. The cable simultaneously conforms to a single vertical combustion test, a single horizontal combustion test, a single inclined combustion test and a bundled class C combustion test.
6. After the sheath is immersed in mineral oil IRM902 for 24 hours at 100 ℃, the maximum change rate of tensile strength is +/-40%, and the maximum change rate of elongation at break is +/-40%;
7. low-temperature performance of the cable: the outer diameter is less than or equal to 12.5mm, the sample is bent at a constant speed for 180 degrees within 1min after being taken out of the low-temperature box under the conditions of low-temperature bending test at-20 ℃ and 4h, and the front and back are continuously carried out for 3 times without cracking the cable;
and (3) carrying out a low-temperature tensile test on the dumbbell sheet, wherein the elongation at break is not less than 100% under the conditions of-20 ℃ and 4 h.
The cable is suitable for port machinery moving by towing at high altitude, such as material trolleys, travelling cranes and the like, and can also be used for providing electric power for other types of mobile equipment, such as towing cables for open-air operation, underground mining and the like, which are usually in a suspension mode, and have higher performance requirements, such as softness, bending resistance (high bending speed and frequent), long reciprocating movement distance and the like.
The cable has good production feasibility, adopts a 5 th-class bare copper conductor and a multi-strand complex twisted structure, the strand bunching direction and the complex twisted direction are both leftward, the outer layer pitch-diameter ratio is reduced, and the conductor is ensured to have round and neat appearance, tightness and uniform pitch. And during cabling, the tension of the cable core is uniform easily, and the filling strip of the composite structure is placed at the center of the cable core, so that the stability, the roundness and the uniformity of the outer diameter of the cable core structure are ensured. The extrusion type cable sheath is suitable for production of extrusion type sheaths, tightness of the cable is improved, and bending resistance of the cable is improved.
Claims (9)
1. A high-speed mobile festoon cable is characterized in that the structure of the cable is as follows:
the outer diameter range of the cable is 19.0 mm-23.0 mm;
the cable is a cable core formed by twisting a plurality of wire cores; the cable core is filled with cable core filling formed by a rubber strip and a fiber braided fabric; the cable core is sequentially coated with a second wrapping layer and an outer sheath from inside to outside; the stranding pitch diameter ratio of the cable core is less than 10 times;
the cable core filling is a strip material which is formed by extruding rubber insulating materials outside the fiber braided fabric and has a circular section, and the diameter range of the cable core filling is 1.0-1.2 mm;
the structure of each wire core is as follows: the cable core conductor, the first wrapping layer and the insulating layer are arranged from inside to outside in sequence; each wire core is symmetrical around the axis of the cable;
the wire core conductor is formed by bundling and combining single stranded wires of the tinned round copper wires and then twisting a plurality of stranded wires; the bunching direction of the folded yarn is left, and the bunching pitch ratio of the folded yarn is controlled to be 20-25 times; the twisting direction of the compound twisting is left direction, the twisting pitch diameter ratio of the compound twisting of the inner layer is controlled to be 15-20 times, and the twisting pitch diameter ratio of the compound twisting of the outer layer is controlled to be 10-12 times; the diameter range of the tinned round copper wire monofilament is 0.397-0.400 mm; the diameter range of the conductor is 5.3 mm-5.9 mm;
the wrapping tape of the first wrapping layer is a reinforced non-woven fabric wrapping tape, and the longitudinal tensile strength of the wrapping tape is greater than 45N/mm 2 The longitudinal elongation at break is more than 45%, the wrapping direction is opposite to the compound twisting direction of the core conductor, and the nominal thickness range of the wrapping tape0.13-0.19 mm, 24-36 mm in width, and the lapping cover width of the lapping tape is not less than 5mm;
the insulating layer is made of ethylene propylene rubber insulating material, the average thickness of the insulating layer ranges from 0.7mm to 0.9mm, and the thickness of the thinnest part is not less than 0.53mm;
the wrapping tape of the second wrapping layer is a non-woven fabric wrapping tape, the wrapping direction is opposite to the twisting direction of the wire cores, the nominal thickness of the wrapping tape is 0.16-0.24 mm, the width of the wrapping tape is 24-36 mm, the average overlapping rate of the wrapping tape is not less than 30%, and the minimum overlapping rate of the wrapping tape is not less than 20%; the longitudinal tensile strength of the wrapping tape is more than 50N/mm 2 The longitudinal elongation at break is more than 10%;
the outer sheath is made of chlorinated polyethylene sheath materials, the average thickness of the outer sheath ranges from 2.1mm to 2.2mm, and the thickness of the thinnest part is larger than 1.56mm.
2. A high speed travelling festoon cable as claimed in claim 1, characterised in that the cable has an outer diameter of 20.6mm.
3. A high speed travelling festoon cable according to claim 1 or 2, characterised in that the cable core is filled with a diameter of 1.2mm and the fibres of the fibre braid are aramid filaments of size 1100 dtex.
4. The high speed mobile festoon cable of claim 2, wherein the cable core has a lay to pitch ratio of 9.
5. The high speed movement festoon cable of claim 2, wherein in the core conductor, the bunching pitch ratio of the strands is 22 times; the twisting pitch diameter ratio of the inner layer compound twisting is 17 times, and the twisting pitch diameter ratio of the outer layer compound twisting is 10 times; the diameter of the tin-plated round copper wire monofilament is 0.398mm; the diameter of the conductor is 5.6mm.
6. The high speed travelling festoon cable as claimed in claim 2, wherein the first wrapping layer has a nominal tape thickness of 0.16mm and a width of 30mm, and has a tape cover width of 7mm and a cover overlap of 23%.
7. The high speed mobile festoon cable of claim 2, wherein the insulation layer has an average thickness of 0.8mm.
8. The high speed travelling festoon cable as claimed in claim 2, wherein the second layer has a nominal tape thickness of 0.2mm and a width of 30mm, and wherein the tape overlap is 6mm and the cover overlap is 20%.
9. The high speed travelling festoon cable of claim 2, wherein the outer jacket has an average thickness of 2.2mm and a thinnest point thickness of 1.96mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220861990.8U CN217767867U (en) | 2022-04-15 | 2022-04-15 | High-speed moving festoon cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220861990.8U CN217767867U (en) | 2022-04-15 | 2022-04-15 | High-speed moving festoon cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217767867U true CN217767867U (en) | 2022-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220861990.8U Active CN217767867U (en) | 2022-04-15 | 2022-04-15 | High-speed moving festoon cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217767867U (en) |
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- 2022-04-15 CN CN202220861990.8U patent/CN217767867U/en active Active
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