CN212624850U - Single core cable convenient for monitoring running state of cable - Google Patents
Single core cable convenient for monitoring running state of cable Download PDFInfo
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- CN212624850U CN212624850U CN202021317298.6U CN202021317298U CN212624850U CN 212624850 U CN212624850 U CN 212624850U CN 202021317298 U CN202021317298 U CN 202021317298U CN 212624850 U CN212624850 U CN 212624850U
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Abstract
The utility model discloses a single core cable of convenient monitoring cable running state, including conductor, from interior to exterior cladding conductor shielding layer, insulating shielding layer, water blocking tape, oversheath outside the conductor, be equipped with the detecting tube in the conductor, the detecting tube includes the body of outside, sets up the heat conduction cream in the body, inlays the first temperature measurement optic fibre of establishing detectable temperature in the heat conduction cream, is equipped with second temperature measurement optic fibre and is used for detecting partial discharge's discharge detection optic fibre outside the water blocking tape. The utility model discloses can conveniently in time detect the state of cable when the actual operation to discover trouble and problem fast, thereby ensure the safe operation of cable.
Description
Technical Field
The utility model relates to a cable manufacturing technical field, concretely relates to conveniently monitor single core cable of cable running state.
Background
In recent years, the electric power industry of China is rapidly developed, particularly, the development of the electric wire and cable industry is rapid, and the variety development of electric wires and cables shows a diversified trend. The electric wire and cable has been developed from pure power transmission to multi-functionalization, i.e. new characteristics are added according to different purposes. For a factory with high-precision intelligent equipment, the requirement on stability and safety of power transmission is high, so that higher and higher requirements are put on the safety of stable operation of a power cable. The existing cable mainly considers the performance requirements of water resistance, fire resistance, oil resistance, low temperature resistance and the like in the aspect of structural design. When the cable has the problems of insulation breakdown, partial discharge and hard force damage, if the cable is damaged by the external environment (such as damage of the surface skin), the cable can be prevented by measures such as changing the laying environment of the cable, but the cable damage caused by the internal reason of the cable cannot be prevented and avoided by changing the external laying environment, and the cable damage is discovered only through manual inspection or detection, so that the workload of cable maintenance is greatly increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that defect or trouble that exist to cable inside that is difficult to that current cable exists carries out timely effectual detection, provide a conveniently monitor cable running state's single core cable, can conveniently in time detect the state of cable when the actual operation to discover trouble and problem fast, thereby ensure the safe operation of cable.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a single core cable of convenient monitoring cable running state, includes the conductor, from interior to exterior cladding conductor shielding layer, insulating shielding layer, water blocking tape, oversheath outside the conductor, is equipped with the detecting tube in the conductor, the detecting tube includes the body of outside, sets up the heat conduction cream in the body, inlays the first temperature measurement optic fibre of establishing detectable temperature in the heat conduction cream, is equipped with second temperature measurement optic fibre and the discharge detection optic fibre that is used for detecting partial discharge outside the water blocking tape.
The utility model discloses a cable is an intelligence middling pressure single core cable, at first, and its conductor sets up the detecting tube, and the detecting tube includes heat conduction cream and the first temperature measurement optic fibre in body, the body, and heat conduction cream wherein can produce the heat transfer during with the conductor operation for first temperature measurement optic fibre to can detect the operating temperature of conductor fast. As can be seen from the skin effect, the outer surface layer of the conductor is mainly used for conducting electricity, so that when the detection tube is arranged in the conductor, on one hand, the conductivity of the conductor can be ensured, and on the other hand, the material consumption and the manufacturing cost can be reduced to the maximum extent, and the weight can be reduced.
And secondly, arranging a second temperature measuring optical fiber outside the water blocking tape, so that the internal temperature of the conductor in operation and the real-time temperature outside the water blocking tape can be respectively detected in real time, and the two temperature data of the cable are subjected to digital real-time simulation, so that the real state of the conductor in operation is judged, the normal operation of the cable is ensured, and the accident caused when the cable is operated is prevented.
In addition, the discharge detection optical fiber can detect the electric signal when the cable has partial discharge fault, thereby rapidly detecting the partial discharge fault of the cable.
Since the temperature measuring optical fiber capable of detecting temperature and the discharge detecting optical fiber for detecting partial discharge are both in the prior art of the sensor field, they will not be described in detail herein.
It can be understood that the tube body connects the thermal conductive paste and the first temperature measuring optical fiber into a whole, so that the tube body can be conveniently arranged in the tubular conductor.
Preferably, the ratio of the cross-sectional area of the first temperature measuring optical fiber to the cross-sectional area of the inner cavity of the tube body of the detection tube is less than or equal to one third.
Through reasonably controlling the ratio of the cross-sectional area of the first temperature measuring optical fiber to the cross-sectional area of the inner cavity of the tube body, the first temperature measuring optical fiber can be conveniently arranged in the tube body, and the tubular conductor has enough wall thickness to ensure the conductivity of the conductor.
Preferably, a halogen-free low-smoke high-flame-retardant belt is further arranged between the water-blocking belt and the outer sheath, and the halogen-free low-smoke high-flame-retardant belt is wound outside the second temperature measuring optical fiber and the discharge detection optical fiber.
Compared with non-woven fabrics, the halogen-free low-smoke high-flame-retardant belt has the advantages of high flame retardance, high temperature resistance and the like. When the halogen-free low-smoke high-flame-retardance belt is wound outside the second temperature measuring optical fiber and the discharge detection optical fiber, the second temperature measuring optical fiber and the discharge detection optical fiber can be tightly bound, the second temperature measuring optical fiber and the discharge detection optical fiber are prevented from being damaged due to displacement and friction, and a good flame-retardant effect can be achieved.
Preferably, the outer sheath is made of halogen-free low-smoke flame-retardant polyolefin.
The outer sheath made of halogen-free low-smoke flame-retardant polyolefin can play a role in preventing water and protecting a cable on one hand and is beneficial to improving the flame-retardant effect of the cable on the other hand.
Preferably, the water-blocking tape is a semiconductive buffering water-blocking tape, and the thickness of the water-blocking tape is 1.5-2.5 mm.
The semi-conductive buffering water-blocking tape can prevent water from entering the surface of the insulating layer to cause water treeing of the cable, and further is beneficial to prolonging the service life of the cable.
Preferably, the insulating layer is made of a water tree resistant insulating material, so that water can be effectively prevented from entering the surface of the insulating layer, and water tree formation of the cable is avoided.
Preferably, the second temperature measuring optical fiber and the discharge detection optical fiber are arranged at equal intervals in the circumferential direction of the cable.
The second temperature measuring optical fiber and the discharge detection optical fiber are positioned at equal intervals in the circumferential direction of the cable through the halogen-free low-smoke high-flame-retardant belt, so that the second temperature measuring optical fiber and the discharge detection optical fiber can be effectively prevented from being overlapped and interfered with each other, and the detection accuracy is ensured.
Preferably, a transparent liquid flow hose is further arranged outside the water blocking tape, colored liquid is arranged in the liquid flow hose, and bubbles communicated with the liquid flow hose are arranged at the end part of the liquid flow hose.
It will be appreciated that the fluid hose and the gas bubbles at the ends form an integrally enclosed interior chamber, with the fluid hose being filled with a colored liquid and the gas bubbles being filled with a gas. When the cable generates heat due to local faults in operation, the colored liquid in the liquid flow hose can enter the bubbles due to thermal expansion, and maintainers can conveniently see the flowing colored liquid from the transparent liquid flow hose and the bubbles to show that the cable generates local heat, and at the moment, the maintainers can conveniently detect a local temperature rise part by using a temperature measuring instrument such as an infrared thermometer and further maintain the cable so as to avoid serious safety accidents.
It is conceivable that the maintenance personnel only need to detect the cable and maintain the cable in a targeted manner when seeing the colored liquid in the bubble to determine that the cable has a local fault, so that the manual detection and maintenance of high frequency of the cable can be effectively avoided.
Particularly, the liquid flow hose has simple structure, sensitive response and accurate signal, and can effectively avoid the signal distortion phenomenon caused by the interference of electromagnetic signals.
Therefore, the utility model discloses following beneficial effect has: the state of the cable in actual operation can be conveniently and timely detected, so that faults and problems can be quickly found, and the safe operation of the cable is ensured.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of a construction of a fluid hose.
In the figure: 1. the device comprises a conductor 2, a conductor shielding layer 3, an insulating layer 4, an insulating shielding layer 5, a water blocking tape 6, an outer sheath 7, a detection tube 71, a tube body 72, heat conducting paste 73, a first temperature measuring optical fiber 8, a second temperature measuring optical fiber 9, a discharge detection optical fiber 10, a halogen-free low-smoke high-flame-retardant tape 11, a liquid flow hose 111 and bubbles.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, a single core cable convenient for monitoring the running state of the cable comprises a conductor 1, a conductor shielding layer 2 covering the conductor from inside to outside, an insulating layer 3, an insulating shielding layer 4, a water blocking tape 5 and an outer sheath 6, wherein the conductor can be made of aluminum alloy so as to sufficiently reduce the cost. In addition, a detection tube 7 is arranged in the tubular conductor, the detection tube comprises an outer tube body 71, heat conducting paste 72 arranged in the tube body, and a first temperature measuring optical fiber 73 embedded in the heat conducting paste and capable of detecting temperature, and the heat conducting paste and the first temperature measuring optical fiber are connected into a whole by the tube body, so that the detection tube can be conveniently arranged in the tubular conductor. And a second temperature measuring optical fiber 8 and a discharge detection optical fiber 9 for detecting partial discharge are also required to be arranged outside the water-blocking tape.
It will be understood that in the case of cables for transmitting alternating current, the outer surface of the conductor is the main conductor, so that when the detector tube is arranged in the conductor, on the one hand, the conductivity of the conductor is ensured, and on the other hand, the material consumption and manufacturing costs are minimized, and the weight is reduced. Secondly, the heat conduction cream in the detection tube can evenly transmit the heat generated by the conductor in operation to the first temperature measurement optical fiber, so that the real-time working temperature of the conductor can be quickly detected. In addition, the second temperature measuring optical fiber arranged outside the water blocking tape can detect the real-time temperature outside the water blocking tape and carry out digital real-time simulation on the two temperature data of the cable, so that the real running state of the conductor is judged, the normal running of the cable is ensured, and accidents are prevented when the cable runs. In addition, the discharge detection optical fiber can detect the electric signal when the cable has partial discharge fault, thereby rapidly detecting the partial discharge fault of the cable.
It should be noted that, the temperature measuring optical fiber for detecting temperature and the discharge detecting optical fiber for detecting partial discharge both belong to the prior art in the field of sensors, and are not described in detail herein, and refer to chinese patent CN109342907A specifically. In addition, for convenience of processing and manufacturing, the conductor can be a special-shaped stranded conductor, so that a detection tube can be arranged in the conductor conveniently.
Preferably, the ratio of the cross-sectional area of the first temperature measuring optical fiber to the cross-sectional area of the inner cavity of the tube body of the detection tube is less than or equal to one third, so that the first temperature measuring optical fiber is convenient to arrange in the tube body, and the outer diameter of the detection tube can be compressed as much as possible, so that the tubular conductor has enough wall thickness to ensure the conductivity of the conductor.
Furthermore, a layer of halogen-free low-smoke high-flame-retardant tape 10 can be arranged between the water-blocking tape and the outer sheath, and the halogen-free low-smoke high-flame-retardant tape is wound outside the second temperature measuring optical fiber and the discharge detection optical fiber. Because the halogen-free low-smoke high-flame-retardant belt has the advantages of high flame retardance, high temperature resistance and the like, on one hand, the second temperature measuring optical fiber and the discharge detection optical fiber can be tightly tied, the second temperature measuring optical fiber and the discharge detection optical fiber are prevented from being damaged due to displacement and friction, and a good flame-retardant effect can be achieved.
Furthermore, the outer sheath can be made of halogen-free low-smoke flame-retardant polyolefin, so that on one hand, the cable can be well protected and protected, on the other hand, the flame-retardant effect of the outer sheath is favorably improved, and the safety of the cable is improved.
As a preferred scheme, the water-blocking tape is a semi-conductive buffering water-blocking tape, and the thickness of the water-blocking tape is 1.5-2.5 mm. The semi-conductive buffering water-blocking tape can prevent water from entering the surface of the insulating layer to cause water treeing of the cable, and further is beneficial to prolonging the service life of the cable.
Furthermore, the insulating layer can be made of a water tree resistant insulating material, so that water can be effectively prevented from entering the surface of the insulating layer, and the water tree formation of the cable is avoided.
Furthermore, the second temperature measuring optical fiber and the discharge detection optical fiber are arranged at equal intervals in the circumferential direction of the cable, so that the second temperature measuring optical fiber and the discharge detection optical fiber are effectively prevented from being overlapped and interfered with each other, and the detection accuracy is ensured.
In order to facilitate the detection of the cable temperature, as shown in fig. 2, a transparent liquid flow hose 11 extending along the axial direction of the cable may be disposed outside the water blocking tape, the pipe diameter of the source flow hose is between 3 mm and 6mm, a red liquid is disposed inside the liquid flow hose, and bubbles 111 communicating with the liquid flow hose are disposed at two ends of the liquid flow hose exposed to the cable, respectively. At the moment, the liquid flow hose and the bubbles at the two ends form an integrally closed inner cavity, the liquid flow hose is filled with red liquid, and the bubbles are filled with gas. The red liquid is stably positioned in the liquid flow hose when not subjected to external force or the like.
When the cable generates heat due to local faults in operation, the colored liquid in the liquid flow hose can enter the bubbles due to thermal expansion, and maintainers can conveniently see the flowing colored liquid from the transparent liquid flow hose and the bubbles, so that the situation that the cable generates local heat is shown, the maintainers can conveniently detect a local temperature rise part of the cable by using a temperature measuring instrument such as an infrared thermometer, and then timely maintain the cable to avoid serious safety accidents.
It should be noted that, the maintenance personnel only need to see the colored liquid in the bubble to determine that the cable has a local fault, and then adopt the method of detecting and maintaining the cable in a targeted manner, so that the manual detection and maintenance of high frequency of the cable can be effectively avoided. In addition, the cable can generate certain heat during normal operation, and at the moment, the red liquid in the liquid flow hose can also partially flow into the air bubble, so that whether the temperature of the cable is abnormally increased can be conveniently distinguished according to the amount of the red liquid entering the air bubble. Of course, the bubble can be made into a vertical tube shape, and a metering scale is arranged on the outer side of the bubble, so that the amount of the red liquid entering the bubble can be conveniently detected.
Claims (8)
1. The utility model provides a single core cable of convenient monitoring cable running state, includes the conductor, from interior to exterior cladding conductor shielding layer, insulating shield, water blocking tape, oversheath outside the conductor, characterized by is equipped with the detecting tube in the conductor, the detecting tube includes the body of outside, sets up the heat conduction cream in the body, inlays the first temperature measurement optic fibre of establishing detectable temperature in the heat conduction cream, is equipped with second temperature measurement optic fibre and the discharge detection optic fibre that is used for detecting partial discharge outside the water blocking tape.
2. The single-core cable convenient for monitoring the running state of the cable according to claim 1, wherein the ratio of the cross-sectional area of the first temperature measuring optical fiber to the cross-sectional area of the inner cavity of the tube body of the detection tube is less than or equal to one third.
3. The single-core cable convenient for monitoring the running state of the cable according to claim 1, wherein a halogen-free low-smoke high-flame-retardant tape is further arranged between the water-blocking tape and the outer sheath, and the halogen-free low-smoke high-flame-retardant tape is wound outside the second temperature measuring optical fiber and the discharge detection optical fiber.
4. A single core cable convenient for monitoring the operating condition of the cable according to claim 1 wherein the outer sheath is made of a halogen free low smoke flame retardant polyolefin.
5. The single-core cable convenient for monitoring the running state of the cable according to claim 1, wherein the water-blocking tape is a semi-conductive buffering water-blocking tape, and the thickness of the water-blocking tape is 1.5-2.5 mm.
6. A single core cable for facilitating the monitoring of the operational status of the cable as claimed in claim 1 wherein the insulation layer is made of a water tree resistant insulation.
7. A single core cable for conveniently monitoring the operational status of the cable as claimed in claim 1, wherein said second temperature measuring optical fiber and said discharge detecting optical fiber are arranged at equal intervals in the circumferential direction of the cable.
8. The single core cable of claim 2 wherein a transparent fluid hose is provided outside the water blocking tape, wherein the fluid hose contains a colored fluid, and wherein a bubble is provided at the end of the fluid hose in communication with the fluid hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021317298.6U CN212624850U (en) | 2020-07-07 | 2020-07-07 | Single core cable convenient for monitoring running state of cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021317298.6U CN212624850U (en) | 2020-07-07 | 2020-07-07 | Single core cable convenient for monitoring running state of cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212624850U true CN212624850U (en) | 2021-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021317298.6U Active CN212624850U (en) | 2020-07-07 | 2020-07-07 | Single core cable convenient for monitoring running state of cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212624850U (en) |
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2020
- 2020-07-07 CN CN202021317298.6U patent/CN212624850U/en active Active
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