CN214897793U - Lightweight multifunctional power cable for shield machine - Google Patents
Lightweight multifunctional power cable for shield machine Download PDFInfo
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- CN214897793U CN214897793U CN202121334014.9U CN202121334014U CN214897793U CN 214897793 U CN214897793 U CN 214897793U CN 202121334014 U CN202121334014 U CN 202121334014U CN 214897793 U CN214897793 U CN 214897793U
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Abstract
The utility model discloses a lightweight multifunctional power cable for shield machine, which comprises a cable core, an inner protection layer, a reinforcing layer and an outer protection layer, wherein the cable core is wrapped on the reinforcing layer and the outer protection layer from inside to outside, the inner protection layer is filled between the cable core and the reinforcing layer, and the cable core is formed by twisting a plurality of power lines, ground lines, monitoring lines, communication lines and optical units; the power line comprises a power line core conductor, a power line tensile core, a conductor shielding layer, an insulating semi-conductive shielding layer and a metal shielding layer, wherein the metal shielding layer is connected with a ground wire in parallel, and the ground wire is a bare wire; the monitoring wire comprises a monitoring wire conductor and a monitoring wire insulating layer wrapped outside the monitoring wire conductor; the communication line comprises a plurality of twisted communication wire cores and communication wire core buffer layers wrapped outside the communication wire cores. The utility model discloses shield constructs quick-witted cable, need possess the function of transmission large capacity data, realize that power, numerical control bear in a cable, simplify the work flow in the underground tunnel, raise the efficiency, convenient and fast.
Description
Technical Field
The utility model relates to the technical field of cables, especially, relate to a multi-functional shield of lightweight constructs machine power cable.
Background
The cable of the shield machine is used for connecting the power supply of the heavy underground shield tunneling machine with the rated voltage of 30kV or below, and can be commonly used in tunnel engineering of subways, railways, highways, municipal administration, hydropower stations and the like. The cable extends along with the advancing of the shield machine to ensure the uninterrupted work of the shield machine. The cable requires to possess performances such as resistant bending, wear-resisting, tensile, in the limited space of underground tunnel, still need to accomplish the lightweight as far as in order to make things convenient for the transportation installation, alleviates personnel's working strength, along with the popularization of national intelligent manufacturing, intelligent monitoring, remote control are future development trend in addition.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a multi-functional shield of lightweight constructs machine power cable.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a lightweight multifunctional power cable for a shield tunneling machine comprises a cable core, an inner protection layer, a reinforcing layer and an outer protection layer, wherein the reinforcing layer and the outer protection layer are wrapped with the cable core from inside to outside, the inner protection layer is filled between the cable core and the reinforcing layer, the cable core is formed by twisting a plurality of power lines, ground lines, monitoring lines, communication lines and optical units, the optical units are arranged in the center of the cable core, the plurality of power lines are adjacently arranged along the circumference of the optical units, the ground lines are arranged in the gaps of two adjacent power lines, and the monitoring lines and the communication lines are separately arranged in the gaps of the other two adjacent power lines;
the power line comprises a power line core conductor, a power line tensile core, a conductor shielding layer, an insulating semi-conductive shielding layer and a metal shielding layer, wherein the power line tensile core is arranged at the center of the power line core conductor;
the optical unit comprises a bare fiber part, and a tensile fiber layer, a metal tape spiral tube and a metal braid layer which are wrapped outside the bare fiber part from inside to outside;
the monitoring wire comprises a monitoring wire conductor and a monitoring wire insulating layer wrapped outside the monitoring wire conductor;
the communication line comprises a plurality of communication line cores twisted together in a short-pitch pair mode and a communication line core buffer layer wrapping the outer portions of the communication line cores.
Preferably, the power core conductor is formed by twisting a plurality of aluminum alloy wires with the monofilament diameter not greater than 0.3mm in a short pitch.
Preferably, the tensile core of the power line is a multi-strand twisted polyester rope.
Preferably, the communication wire core comprises a communication wire conductor and a communication wire insulating layer wrapped outside the communication wire conductor.
Preferably, the reinforcing layer is a polyester rope reinforcing layer.
Preferably, the bare fiber part comprises a plurality of bare fibers, tensile fibers, silicon-based fiber paste and a PBT (polybutylene terephthalate) sleeve, the tensile fibers are arranged outside the bare fibers, the PBT sleeve wraps the bare fibers and the tensile fibers, and the silicon-based fiber paste is filled between the PBT sleeve and the bare fibers and between the PBT sleeve and the tensile fibers.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the monitoring wire is arranged, so that the leakage current monitoring function is realized when the cable has a fault, and the safety of the cable is improved;
(2) the communication lines are arranged and twisted by adopting short-pitch pair twisting, so that the CAN bus specification is met, and high-frequency data signals CAN be transmitted;
(3) the power and numerical control are carried in one cable, the working process in the underground tunnel is simplified, the efficiency is improved, and the method is convenient and fast.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the structure of the light unit of the present invention.
In the figure: 1. a tensile core of the power line; 2. a power core conductor; 3. a conductor shield layer; 4. an insulating layer; 5. a ground wire; 6. an insulating semiconductive shield layer; 7. a metal shielding layer; 8. monitoring the line conductor; 9. monitoring a line insulation layer; 10. a light unit; 11. an inner protective layer; 12. a polyester rope reinforcing layer; 13. an outer jacket; 14. a communication line conductor; 15. a communication line insulating layer; 16. a communication wire core buffer layer; 101. bare fiber; 102. a tensile fiber layer; 103. silicon-based fiber paste; 104. a PBT sleeve; 105. a tensile fiber layer; 106. a metal band spiral tube; 107. a metal braid.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
referring to fig. 1-2, a lightweight multifunctional power cable for a shield machine comprises a cable core, an inner sheath 11, a reinforcing layer 12 and an outer sheath 13.
The cable core is formed by twisting 3 power lines, a ground line 5, a monitoring line, a communication line and an optical unit 10, wherein the optical unit 10 is arranged in the center of the cable core, the 3 power lines are adjacently arranged along the circumference of the optical unit 10, the ground line 5 is arranged in a gap between two adjacent power lines, and the monitoring line and the communication line are separately arranged in a gap between the other two adjacent power lines.
The power line comprises a power line core conductor 2, a power line tensile core 1, a conductor shielding layer 3, an insulating layer 4, an insulating semi-conductive shielding layer 6 and a metal shielding layer 7, the power line tensile core 1 is arranged at the center of the power line core conductor 2, the conductor shielding layer 3, the insulating layer 4, the insulating semi-conductive shielding layer 6 and the metal shielding layer 7 wrap the power line core conductor 2 from inside to outside, a ground wire 5 is placed between the two power lines, the ground wire 5 is a bare wire, the ground wire 5 is connected with the metal shielding layer 7 in parallel, the ground wire resistance is reduced, and the short-circuit current capacity is improved.
The power core conductor 2 is formed by twisting a plurality of aluminum alloy wires with the monofilament diameter not more than 0.3mm in a short pitch mode, 3 power cores are tightly twisted together, and the outer diameter of the cable is minimized. The power line tensile core 1 is a multi-strand twisted polyester rope.
The monitoring wire comprises a monitoring wire conductor 8 and a monitoring wire insulating layer 9 wrapped outside the monitoring wire conductor 8, and the monitoring wire insulating layer plays a role in monitoring leakage current when a cable has a fault, so that the safety of the cable is improved.
The communication line comprises a plurality of communication line cores twisted together in short-pitch pairs and a communication line core buffer layer 16 wrapping the outer parts of the plurality of communication line cores. The communication wire core comprises a communication wire conductor 14 and a communication wire insulating layer 15 wrapped outside the communication wire conductor 14, the communication wire is twisted in pairs with short pitches, the CAN bus specification is met, high-frequency data signals CAN be transmitted, and the communication wire core buffer layer 16 CAN be made of high-elasticity rubber.
The optical unit comprises a bare fiber part, and a tensile fiber layer 105, a metal tape spiral pipe 106 and a metal braid layer 107 which are wrapped outside the bare fiber part from inside to outside. The bare fiber part comprises a plurality of bare fibers 101, tensile fibers 102, silicon-based fiber paste 103 and a PBT sleeve 104, the tensile fibers 102 are arranged outside the bare fibers 101, the PBT sleeve 104 wraps the bare fibers 101 and the tensile fibers 102, and the silicon-based fiber paste 103 is filled between the PBT sleeve 104 and the bare fibers 101 and between the PBT sleeve 104 and the tensile fibers 102.
The dacron rope reinforcing layer 12 and the outer jacket 13 wrap the cable core from inside to outside, and an inner jacket 11 is filled between the cable core and the dacron rope reinforcing layer 12. The two protective layers are made of the same material, the two protective layers and the middle reinforcing layer are made of a string extrusion one-step forming process, and the total thickness of the two protective layers is 2/3 with standard thickness.
The utility model has the advantages that:
the conductor is formed by twisting aluminum alloy or copper-clad aluminum wires at short pitch, and the copper density is 8.9g/cm3Aluminum alloy density 2.7g/cm3～2.8g/cm3Under the condition of the same current-carrying capacity, the weight of the cable is obviously reduced by 40-60% by adopting the aluminum alloy compared with that of the copper, and the aluminum alloy is a key factor for realizing light weight.
The ground wire is placed among the three power wire cores, the three power wire cores are tightly twisted together, the structure is compact, and the outer diameter of the cable can be minimized. The smaller the outer diameter, the less the material of the protective layer is consumed, and the purpose of reducing the weight is further achieved on the premise of ensuring the performance.
The optical unit is arranged at the center of the cable, and compared with the optical unit arranged between the gaps of the power lines, the influence of external pressure on the optical unit can be reduced, and meanwhile, the influence of temperature during vulcanization of the inner protection layer on the optical fiber transmission performance in the optical unit is weakened.
The silica-based fiber paste in the optical unit has proper viscosity, high temperature resistance and good thermal stability, and effectively protects bare fibers from being influenced by temperature when short-time high temperature is generated due to short circuit of a cable or instantaneous high temperature is generated due to lightning stroke, thereby ensuring the transmission performance of optical fibers. The silica-based fiber paste and the tensile fiber act together to enable the bare fiber to be in a macroscopic 'suspension' state, when the cable is bent, the bare fiber has enough buffer space without being influenced by external force, and the integrity of the optical fiber is ensured. The PBT sleeve containing the fiber paste is made of PBT material, the PBT has excellent high-temperature stability and extremely low water absorption, and excellent dimensional stability can be kept in the cable manufacturing and running processes, so that the extra length of the optical fiber is not changed, and the reliability of the optical fiber is improved. Similarly, a plurality of strands of high-strength fibers are arranged on the periphery of the PBT sleeve, so that the PBT sleeve is in a macroscopic 'suspension' state, namely the center of the metal band spiral tube, the minimum ratio of the inner diameter of the metal band spiral tube to the outer diameter of the PBT sleeve is 1.2/1, and the larger the number of fibers which can be actually accommodated is, the better the minimum ratio is, and the larger the residual length of the PBT sleeve can be controlled. Similarly, by controlling the pay-off tension of the optical unit, and if necessary, zero tension pay-off, the optical unit also has a certain excess length relative to the cable core. By combining the three extra lengths, the total extra length can reach 1.2 percent, and the reliability of the optical fiber is obviously improved. In addition, the bare fiber and PBT sleeve have enough buffer space in the metal belt spiral tube, which ensures that the optical fiber is not influenced when the cable is bent and pulled. The 1.2% excess ensures fiber integrity even if locally involved.
The sheath is two-layer, the centre is the dacron rope enhancement layer, two-layer sheath adopts the same material, double-layer sheath and middle enhancement layer adopt cluster crowded one shot forming technology, adopt the dacron rope to strengthen immediately after the first layer sheath is accomplished, accomplish the second layer sheath again, get into the vulcanization process at last, the cross-linking is accomplished simultaneously to two-layer sheath, two-layer sheath forms an organic whole, under the effect of dacron rope enhancement layer, the tensile strength of outer jacket doubles and increases, tear strength promotes to 29N/mm by original 5N/mm, greatly improved cable wearability, bending resistance, 2/3 of this two-layer sheath gross thickness for standard thickness, the total weight of cable reduces to original 60% ~ 70%.
The utility model provides a multi-functional shield of lightweight constructs machine cable, its weight reduces to original 60% ~ 70%, contains optic fibre, can transmit large-traffic data, can reduce personnel's number and working strength with the help of realizing the real-time supervision of shield structure machine working face, remote control, and the cable is wear-resisting, resistant crooked, safe and reliable, long service life can satisfy user's needs.
Above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered within the protection scope of the present invention.
Claims (6)
1. A lightweight multifunctional power cable for a shield tunneling machine is characterized by comprising a cable core, an inner protection layer, a reinforcing layer and an outer protection layer, wherein the reinforcing layer and the outer protection layer are wrapped with the cable core from inside to outside, the inner protection layer is filled between the cable core and the reinforcing layer, the cable core is formed by twisting a plurality of power lines, a ground line, a monitoring line, a communication line and an optical unit, the optical unit is arranged in the center of the cable core, the power lines are adjacently arranged along the circumference of the optical unit, the ground line is arranged in a gap between two adjacent power lines, and the monitoring line and the communication line are separately arranged in gaps between the other two adjacent power lines;
the power line comprises a power line core conductor, a power line tensile core, a conductor shielding layer, an insulating semi-conductive shielding layer and a metal shielding layer, wherein the power line tensile core is arranged at the center of the power line core conductor;
the optical unit comprises a bare fiber part, and a tensile fiber layer, a metal tape spiral tube and a metal braid layer which are wrapped outside the bare fiber part from inside to outside;
the monitoring wire comprises a monitoring wire conductor and a monitoring wire insulating layer wrapped outside the monitoring wire conductor;
the communication line comprises a plurality of communication line cores twisted together in a short-pitch pair mode and a communication line core buffer layer wrapping the outer portions of the communication line cores.
2. The power cable for the light-weight multifunctional shield tunneling machine according to claim 1, wherein the power core conductor is formed by twisting a plurality of aluminum alloy wires with the monofilament diameter of not more than 0.3mm in a short pitch.
3. The power cable for the light-weight multifunctional shield tunneling machine according to claim 2, wherein the power wire tensile core is a multi-strand twisted polyester rope.
4. The power cable for the light-weight multifunctional shield tunneling machine according to claim 1, wherein the communication wire core comprises a communication wire conductor and a communication wire insulating layer wrapped outside the communication wire conductor.
5. The power cable for the light-weight multifunctional shield tunneling machine according to claim 1, wherein the reinforcing layer is a polyester rope reinforcing layer.
6. The power cable for the light-weight multifunctional shield tunneling machine according to claim 1, wherein the bare fiber part comprises a plurality of bare fibers, tensile fibers, silicon-based fiber paste and a PBT sleeve, the tensile fibers are arranged outside the bare fibers, the PBT sleeve wraps the bare fibers and the tensile fibers, and the silicon-based fiber paste is filled between the PBT sleeve and the bare fibers and between the PBT sleeve and the tensile fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121334014.9U CN214897793U (en) | 2021-06-16 | 2021-06-16 | Lightweight multifunctional power cable for shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121334014.9U CN214897793U (en) | 2021-06-16 | 2021-06-16 | Lightweight multifunctional power cable for shield machine |
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| Publication Number | Publication Date |
|---|---|
| CN214897793U true CN214897793U (en) | 2021-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121334014.9U Active CN214897793U (en) | 2021-06-16 | 2021-06-16 | Lightweight multifunctional power cable for shield machine |
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| Country | Link |
|---|---|
| CN (1) | CN214897793U (en) |
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2021
- 2021-06-16 CN CN202121334014.9U patent/CN214897793U/en active Active
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