CN213400675U - Cable with humidity measurement component - Google Patents
Cable with humidity measurement component Download PDFInfo
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- CN213400675U CN213400675U CN202022908511.7U CN202022908511U CN213400675U CN 213400675 U CN213400675 U CN 213400675U CN 202022908511 U CN202022908511 U CN 202022908511U CN 213400675 U CN213400675 U CN 213400675U
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Abstract
The utility model relates to a cable with humidity measurement part, including a plurality of heart yearns, inner sheath and oversheath, the cable still includes humidity measurement part and conformal daub, humidity measurement part includes humidity sensing probe and connecting circuit, humidity sensing probe sets up the outside of heart yearn, humidity sensing probe's outside is provided with the inner sheath for the position of heart yearn and humidity sensing probe is relatively fixed; the outer side interval of inner sheath is equipped with oversheath and type following daub, the surface of type following daub flushes with the surface of oversheath, and the type following daub prevents that moisture from permeating between inner sheath and the oversheath. The humidity sensing probe is arranged in the middle joint and can measure the moisture condition in the middle joint, the moisture condition in the cable is monitored in real time under the condition that the multilayer sheath is not disassembled, and the problems of short circuit and open circuit caused by moisture permeation are avoided. And the water-proof type-following daub is matched, so that the water infiltration is avoided at the source.
Description
Technical Field
The utility model belongs to the technical field of waterproof cable, concretely relates to cable with wet measurement part.
Background
With the progress of electrical technology, the voltage requirement born by the cable is higher and higher, the transmission line is longer and longer, the environment of the cable is more and more complex, and higher requirements are provided for the safety and stability of the cable. Especially in the aspect of water and moisture resistance, the safety problem is particularly obvious. At present, because the defect of the external protection structure of the cable leads to the cable to easily appear moisture infiltration or leak the circumstances that gets into inside after long-time use, moisture not only can cause the inside parts of cable to corrode in the cable, and seriously influence the short circuit of circuit, the problem of opening a circuit, consequently, waterproof problem in the cable is the problem that technical personnel in the field face always, need urgently one kind and can measure the cable that has waterproof function simultaneously to inside moisture, the technical personnel in the field of being convenient for master the cable condition, in time maintain.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the utility model provides a cable with humidity measurement part, the cable includes a plurality of heart yearns, inner sheath and oversheath, the cable still includes humidity measurement part and conformal daub, humidity measurement part includes humidity sensing probe and connecting circuit, humidity sensing probe sets up in the outside of heart yearn, humidity sensing probe's outside is provided with the inner sheath for the position of heart yearn and humidity sensing probe is relatively fixed; the outer side interval of inner sheath is equipped with oversheath and type following daub, the surface of type following daub flushes with the surface of oversheath, and the type following daub prevents that moisture from permeating between inner sheath and the oversheath.
In practice, along with the extension of cable live time, inside moisture can permeate entering cable usually, influence the safe use of circuit, the utility model provides a the cable is equipped with the moisture measurement part, can measure the inside moisture condition of cable, under the condition of the multilayer sheath of cable not unpack apart, can the moisture condition in the real-time supervision cable, when moisture is more in the cable, reminds technical staff in time to maintain or change the cable, effectively avoids because of the short circuit that moisture infiltration leads to, the problem of opening a circuit. And the cable is matched with conformal daub arranged outside the cable, so that the waterproof function is realized, and the moisture is prevented from permeating outside the cable as much as possible.
The core wire comprises a conductor, an insulating layer and a copper shielding layer, the conductor is used for bearing the power transmission function, the insulating layer is wrapped on the outer side of the conductor, the copper shielding layer is wrapped on the outer side of the insulating layer, the copper shielding layer passes through capacitance current when the cable normally runs, and the electric field is shielded through short-circuit current when short circuit occurs.
The conductor is selected from copper wire, copper alloy wire, aluminum wire, silver wire or twisted wire of a plurality of metal wires.
Preferably, the insulating layer is an insulating rubber layer or a flexible insulating resin layer, such as a crosslinked polyethylene insulating layer, which has good heat resistance and mechanical properties and is suitable for insulating layers of large high-voltage cables.
Preferably, a conductor shielding layer is arranged between the conductor and the insulating layer and fills a gap between the conductor and the insulating layer, the conductor shielding layer is made of a semi-conductive material, and the conductor shielding layer has the same potential as the conductor and is in good contact with the insulating layer, so that partial discharge between the conductor and the insulating layer is avoided.
Preferably, an insulation shielding layer is arranged between the insulation layer and the copper shielding layer and fills a gap between the insulation layer and the copper shielding layer, the insulation shielding layer is made of a semi-conductive material, and the insulation shielding layer and the copper shielding layer are equipotential, so that local discharge between the insulation layer and the copper shielding layer is avoided.
The cable comprises a core wire, namely a single-core cable; the cable comprises two core wires, namely a double-core cable; the cable comprises three core wires, namely a three-core cable.
Optionally, the humidity sensing probe is arranged outside the core wire, the humidity sensing probe is coated with a filling material, the filling material fixes the positions of the core wire and the humidity sensing probe, the filling material is coated with an inner sheath, and the filling material is selected from sponge, insulating rubber or foam.
Optionally, the humidity sensing probe is arranged inside the filling material, and an inner sheath is coated outside the filling material.
Optionally, the humidity sensing probe is arranged outside the filling material, the outer part of the filling material is coated with an inner sheath, and the inner sheath can fix the positions of the core wire, the filling material and the humidity sensing probe.
Optionally, the humidity sensing probe is wrapped with a wrapping tape, and the wrapping tape is wrapped with a filling material or an inner sheath, so as to further firmly fix the position of the humidity sensing probe.
Inside the sheath including humidity sensing probe's position for measure the moisture in the cable within the inner sheath, in practice, because moisture infiltration or leakage, when the moisture enters between the inside and outside sheaths, little to cable transmission's influence, consequently needn't measure the moisture between the inside and outside sheaths, if moisture is less moreover, then can be absorbed by inside and outside sheaths. When moisture permeates into the inner sheath, the moisture is relatively high, the inner sheath and the outer sheath cannot absorb or block the corrosion of the moisture to the interior of the cable, the electrical safety performance of the cable can be seriously threatened under the condition, the moisture measuring component is very necessary to be arranged at the moment, when the moisture sensing probe detects the moisture, the inner sheath cannot resist the moisture, the moisture threatens the copper shielding layer, and at the moment, a technician is reminded of needing to maintain or replace the cable.
As described above, the installation position of the humidity sensing probe between the copper shielding layer and the inner sheath is flexible, and different installation positions are selected according to the actual moisture early warning requirement, for example, the humidity sensing probe is arranged between the filling material and the inner sheath or inside the filling material, so that a period of time is required for the moisture to permeate the filling material, and a buffer time is provided for maintaining or replacing the cable; the humidity sensing probe is arranged between the core wire and the filling material, so that the copper shielding layer can be corroded by moisture immediately, technicians are required to respond quickly, and the cable can be maintained or replaced in time.
The connecting circuit is connected with the humidity sensing probe and arranged along the length direction of the cable, the cable penetrates out of the joint position of the conformal cement and the outer sheath, and then the connecting circuit is connected with external analysis and detection equipment.
The outside of inner sheath is equipped with the type following daub, and the type following daub segmentation is established at the optional position of the length direction of cable, for example the head and/or the afterbody and/or the middle part of cable, and the direct cladding of type following daub is in the outside of inner sheath, prevents external environment's moisture infiltration cable.
The conformal daub is polyvinyl chloride daub, and water is prevented from permeating into the intermediate joint. The polyvinyl chloride daub has good elasticity, strong binding power, high heat resistance, good low-temperature flexibility, slow aging and acid and alkali corrosion resistance, and is a waterproof material with excellent performance. The polyvinyl chloride cement can be tightly wrapped outside the inner sheath, and is suitable for long-term use of large high-voltage or ultrahigh-voltage cables which are located outdoors for a long time.
The outer part of the inner sheath is provided with an outer sheath, the outer sheath and the conformal daub are alternately arranged outside the inner sheath, namely the outer part of the inner sheath between the two sections of conformal daub is coated with the outer sheath. The inner sheath and the outer sheath are both rubber layers, the inner sheath wraps the periphery of the core wire through an extrusion process, and the outer sheath wraps the outer layer of the inner sheath.
The outer surface of the conformal daub is flush with the outer surface of the outer sheath, so that the cable is integrally flat and convenient to transport and install.
Optionally, a steel armor layer is arranged between the inner sheath and the outer sheath, and the steel armor layer wraps the inner sheath and the structure inside the inner sheath, so that the function of fixing and supporting is achieved, the strength requirement of the cable is met, the inner sheath and the structure inside the inner sheath are further fastened, and gaps and partial discharge are reduced. And a steel armor layer is not arranged between the inner sheath and the conformal cement, so that the water seepage of gaps of the steel armor layer is prevented, and the waterproof performance of the cable is further improved.
Optionally, a wrapping tape is wrapped outside the steel armor layer, and a joint of the steel armor layer is fixed. Band all adopt half overlapping to wrap, prevent that space department from permeating water.
Optionally, the outside of cable is equipped with waterproof sticky tape, waterproof sticky tape is half overlapping to be wrapped.
Cable with survey wet part, have high elasticity, ageing resistance, performance that dielectric strength is high, anticorrosion and waterproof nature are better in natural environment, simple installation moreover, use reliably.
Drawings
Fig. 1 is a perspective view of the cable with a moisture measuring part of example 1.
Fig. 2 is a schematic view of the cable with a moisture measuring means of example 1.
Fig. 3 is a cross-sectional structural view of the cable with a moisture measuring part of example 1.
In the figure, 1-core wire, 101-conductor, 102-insulating layer, 103-copper shielding layer, 104-conductor shielding layer, 105-insulating shielding layer, 2-humidity sensing probe, 3-inner sheath, 4-conformal daub, 5-outer sheath, 6-filling material and 7-steel armor layer. 8-connecting the circuit.
Detailed Description
Example 1
As shown in fig. 1-3, the cable with a moisture measuring component according to this embodiment includes three core wires 1, a moisture measuring component, an inner sheath 3, a conformal mastic 4, and an outer sheath 5, where the moisture measuring component includes a humidity sensing probe 2 and a connection circuit 8 thereof, the humidity sensing probe 2 is disposed outside the core wires 1, and the inner sheath 3 is disposed outside the humidity sensing probe 2, so that the core wires and the humidity sensing probe are relatively fixed in position; the outer side interval of inner sheath 3 is equipped with oversheath 5 and along with type clay 4, and oversheath 5 arranges in turn with the outside of type clay 4 including outer sheath 3 promptly, and the surface of along with type clay 4 flushes with the surface of oversheath 5, and along with the type clay prevents that moisture from permeating between inner sheath and the oversheath.
The core wire 1 comprises a conductor 101, an insulating layer 102 and a copper shielding layer 103, wherein the conductor 101 is formed by twisting a plurality of copper wires, the conductor plays a role in power transmission, the insulating layer wraps the outer side of the conductor, the copper shielding layer wraps the outer side of the insulating layer, the copper shielding layer passes through capacitance current during normal operation of a cable, and when a short circuit occurs, the electric field is shielded through short-circuit current.
The insulating layer 102 is a crosslinked polyethylene insulating layer which has good heat resistance and mechanical properties and is suitable for insulating layers of large high-voltage cables.
A conductor shielding layer 104 is arranged between the conductor 101 and the insulating layer 102 and fills a gap between the conductor and the insulating layer, the conductor shielding layer 104 is made of a semi-conductive material, and the conductor shielding layer has the same potential as the conductor and is in good contact with the insulating layer, so that partial discharge between the conductor and the insulating layer is avoided.
An insulation shielding layer 105 is arranged between the insulation layer 102 and the copper shielding layer 103 and fills a gap between the insulation layer and the copper shielding layer, the insulation shielding layer 105 is made of a semi-conductive material, and the insulation shielding layer and the copper shielding layer have the same potential, so that the local discharge between the insulation layer and the copper shielding layer is avoided.
The humidity sensing probe 2 is wrapped by a wrapping tape, and the wrapping tape is wrapped by an inner sheath, so that the position of the humidity sensing probe is further firmly fixed.
The connecting circuit 8 is connected with the humidity sensing probe 2 and arranged along the length direction of the cable, penetrates out of the cable at the connecting position of the conformal cement 4 and the outer sheath 5, and is connected with external analysis and detection equipment.
The outside of inner sheath 3 is equipped with type-following daub 4, and type-following daub is polyvinyl chloride daub, and type-following daub 4 segmentation is established at the head, afterbody and the middle part of cable, and the direct cladding of type-following daub 4 prevents external environment's moisture infiltration cable in the outside of inner sheath 3.
The outer part of the inner sheath 3 is provided with an outer sheath 5, and the outer part of the inner sheath between the two sections of conformal daub 4 is coated with the outer sheath 5. The inner sheath 3 and the outer sheath 5 are rubber layers, the inner sheath 3 wraps the periphery of the core wire 1 through an extrusion process, and the outer sheath 5 wraps the outer portion of the inner sheath 3. The outer surface of the conformal daub 4 is flush with the outer surface of the outer sheath 5, so that the cable is flat and convenient to transport and install.
Be equipped with steel armour layer 7 between inner sheath 3 and the oversheath 5, steel armour layer 7 parcel inner sheath and inside structure play the effect of fixed stay, satisfy the intensity requirement of cable, further fasten inner sheath and inside structure, reduce space and partial discharge. No steel armor layer 7 is arranged between the inner sheath 3 and the conformal mortar 4, so that water seepage of gaps of the steel armor layers is prevented, and the waterproof performance of the cable is further improved.
Wrapping belts are wrapped outside the steel armor layers 7, and the joints of the steel armor layers 7 are fixed. And a waterproof adhesive tape is arranged outside the cable. Band and waterproof sticky tape all adopt half overlapping to wrap, prevent that space department from permeating water.
Example 2
This embodiment cable with moisture-detecting component, having single heart yearn 1, humidity sensing probe 2 sets up in the outside of heart yearn 1, and humidity sensing probe 2's outside cladding has filler material 6, the fixed heart yearn of filler material and humidity sensing probe's position, the outside cladding of filler material 6 has inner sheath 3.
The outside of inner sheath 3 is equipped with along with type clay 4, and head and the afterbody at the cable are established in the segmentation of along with type clay 4, and the direct cladding of along with type clay 4 prevents external environment's moisture infiltration cable in the outside of inner sheath 3.
The other structure of this embodiment is the same as embodiment 1.
Example 3
The cable with the humidity measuring component has a single core wire 1, a humidity sensing probe 2 is fixed inside a filling material 6 through a wrapping tape, and an inner sheath 3 is wrapped outside the filling material 6.
The other structure of this embodiment is the same as embodiment 1.
Claims (10)
1. A cable with a humidity measuring component comprises a plurality of core wires, an inner sheath and an outer sheath, and is characterized by further comprising the humidity measuring component and conformal daub, wherein the humidity measuring component comprises a humidity sensing probe and a connecting circuit thereof, the humidity sensing probe is arranged on the outer side of the core wires, the inner sheath is arranged on the outer side of the humidity sensing probe, and the core wires and the humidity sensing probe are relatively fixed; the outer side interval of inner sheath is equipped with oversheath and type following daub, the surface of type following daub flushes with the surface of oversheath, and the type following daub prevents that moisture from permeating between inner sheath and the oversheath.
2. The cable of claim 1, wherein the core comprises a conductor, an insulating layer, and a copper shield, the insulating layer being wrapped around the outside of the conductor, the copper shield being wrapped around the outside of the insulating layer;
a conductor shielding layer is arranged between the conductor and the insulating layer and fills a gap between the conductor and the insulating layer;
an insulation shielding layer is arranged between the insulation layer and the copper shielding layer and fills a gap between the insulation layer and the copper shielding layer, and the insulation shielding layer and the conductor shielding layer are both made of semiconductive materials.
3. The cable of claim 2, wherein the moisture sensing probe is disposed outside of the core wire, the moisture sensing probe is externally coated with a filler material that fixes the position of the core wire and the moisture sensing probe, and the filler material is externally coated with an inner jacket.
4. The cable of claim 2, wherein the moisture sensing probe is disposed inside a filler material, the exterior of which is coated with an inner jacket.
5. The cable of claim 2, wherein the moisture sensing probe is disposed on the exterior of the filler material, the exterior of the filler material being coated with an inner sheath capable of fixing the position of the core, the filler material and the moisture sensing probe.
6. The cable of any one of claims 3, 4, and 5, wherein the moisture sensing probe is externally wrapped with tape, and the tape is externally wrapped with a filling material or an inner sheath.
7. The cable of claim 1, wherein the connecting circuit is connected to the humidity sensing probe and arranged along the length direction of the cable, penetrates out of the cable at the joint position of the conformal mastic and the outer sheath, and is connected to an external analysis and detection device.
8. The cable of claim 1, wherein the conformal cement is disposed outside the inner sheath, the conformal cement is disposed at any position along the length direction of the cable in a segmented manner, and the conformal cement is directly coated outside the inner sheath to prevent moisture in the external environment from permeating into the cable.
9. The cable of claim 8, wherein the inner sheath is provided with an outer sheath on the outside, the outer sheath and the conformal cement are alternately arranged on the outside of the inner sheath, and the outer sheath is coated on the outside of the inner sheath between the two sections of conformal cement.
10. The cable of claim 9, wherein a steel armor layer is disposed between the inner sheath and the outer sheath, and the steel armor layer surrounds the inner sheath and its internal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022908511.7U CN213400675U (en) | 2020-12-07 | 2020-12-07 | Cable with humidity measurement component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022908511.7U CN213400675U (en) | 2020-12-07 | 2020-12-07 | Cable with humidity measurement component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213400675U true CN213400675U (en) | 2021-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022908511.7U Active CN213400675U (en) | 2020-12-07 | 2020-12-07 | Cable with humidity measurement component |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213400675U (en) |
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2020
- 2020-12-07 CN CN202022908511.7U patent/CN213400675U/en active Active
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