CN219659406U - Cable temperature measurement type intermediate joint - Google Patents
Cable temperature measurement type intermediate joint Download PDFInfo
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- CN219659406U CN219659406U CN202320622871.1U CN202320622871U CN219659406U CN 219659406 U CN219659406 U CN 219659406U CN 202320622871 U CN202320622871 U CN 202320622871U CN 219659406 U CN219659406 U CN 219659406U
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- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 25
- 210000001503 joint Anatomy 0.000 claims abstract description 22
- 239000010410 layer Substances 0.000 claims description 94
- 239000004568 cement Substances 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000004861 thermometry Methods 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 7
- 239000000523 sample Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000005684 electric field Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000002390 adhesive tape Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model discloses a cable temperature measurement type intermediate joint, which relates to the technical field of cables and comprises an intermediate joint main body, two high-voltage cables and a passive temperature measurement ring, wherein the intermediate joint main body is arranged between the two high-voltage cables, wire cores of the two connected high-voltage cables are mutually butted, an intermediate connecting pipe is sleeved outside the intermediate connecting pipe, a high-dielectric constant medium is wrapped outside the intermediate connecting pipe, and at least one passive temperature measurement ring is arranged inside the high-dielectric constant medium and is tightly sleeved on the wire core of the high-voltage cable; according to the utility model, the high dielectric constant medium is filled between the inner shielding pipe and the middle connecting pipe of the middle joint main body, so that the normal operation of the electric performance of the middle joint can be ensured, meanwhile, the inner shielding pipe and the middle connecting pipe do not form an equipotential structure, and a passive temperature measuring ring can obtain a voltage difference and work normally.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a cable temperature measurement type intermediate joint.
Background
A cable is an electrical energy or signal transmission device, typically consisting of several wires or groups of wires. After the cable is laid, the sections must be connected as a unit in order to form a continuous line, and these points of connection are called cable joints. The cable joints in the middle of the cable line are called intermediate joints, while the cable joints at both ends of the line are called terminal heads. Cable intermediate connectors are often concentrated areas of cable failure, the operating conditions of which are indirectly reflected by temperature monitoring of the conductor cores at the joints. The temperature detection at the cable connector generally adopts a passive temperature measuring ring for temperature detection, the passive temperature measuring ring is composed of a ring integrated PCB circuit board, a thermocouple and other devices, the passive temperature measuring ring is generally arranged inside a sealed middle connector, voltage cannot be provided outside the device, and voltage difference is provided for the device to supply power when the device runs at high voltage through a circuit of the inner middle connector.
At present, a conductive/semiconductive medium (such as a semiconductive adhesive tape) is filled between an inner shielding pipe and an intermediate connecting pipe (cable core) of the intermediate joint, so that the inner shielding pipe and the intermediate connecting pipe are equipotential, the inner electric field is optimized, and the stable operation of the performance is ensured.
Disclosure of Invention
The utility model provides a cable temperature measurement type intermediate joint, which solves the technical problems.
In order to solve the technical problems, the cable temperature measurement type intermediate joint provided by the utility model comprises an intermediate joint main body, two high-voltage cables and a passive temperature measurement ring, wherein the intermediate joint main body is arranged between the two high-voltage cables, two wire cores connected with the high-voltage cables are mutually butted, an intermediate connecting pipe is sleeved outside the intermediate connecting pipe, a high-dielectric constant medium is wrapped outside the intermediate connecting pipe, and at least one passive temperature measurement ring is arranged inside the high-dielectric constant medium and is tightly sleeved on the wire cores of the high-voltage cables.
Preferably, the middle joint body comprises an outer shielding layer I, the outer shielding layer I is arranged outside, an insulating layer I is arranged inside the outer shielding layer I, stress cones are arranged on two sides of the insulating layer I and are in contact with two high-voltage cables penetrating into the middle joint body, a shielding pipe is arranged in the middle of the insulating layer I, and a high-dielectric constant medium is wrapped.
Preferably, the high dielectric constant medium material is one of stress control band or stress evacuation cement or stress tube; the high dielectric constant material has high insulating property, so that the strength of an electric field can be dispersed, and the electrical property of a product is improved. The high dielectric material is filled in the gap between the wire core and the middle joint, the inside is free of gaps, the stress evacuating cement effect is optimal, the viscosity is high, and the filling effect is excellent.
Preferably, the middle part of the passive temperature measuring ring is penetrated with a connecting hole and is inserted with a wire core of a high-voltage cable, the inner wall and the outer wall of the passive temperature measuring ring are respectively an inner electrode layer and an outer electrode layer, corners of the inner electrode layer and the outer electrode layer are subjected to chamfering treatment, a surface electric field is reduced, electric performance is improved, a flexible circuit board layer and a thermocouple layer are arranged inside the passive temperature measuring ring, a thermocouple layer probe penetrates through the inner electrode layer and is in contact with the high-voltage cable core, and an insulating layer II is filled in a gap interlayer between the inner electrode layer and the outer electrode layer.
Preferably, the outer electrode layer and the inner electrode layer are electrically connected to the flexible circuit board layer for supplying power, and the thermocouple layer is also electrically connected to the flexible circuit board layer.
Preferably, the flexible circuit board layer is provided with a wireless transmitting module and is wirelessly connected with an external wireless signal receiver.
Compared with the related art, the cable temperature measurement type intermediate joint provided by the utility model has the following beneficial effects:
according to the utility model, the high dielectric constant medium is filled between the inner shielding pipe and the middle connecting pipe of the middle joint main body, so that the normal operation of the electric performance of the middle joint can be ensured, meanwhile, the inner shielding pipe and the middle connecting pipe do not form an equipotential structure, and a passive temperature measuring ring can obtain a voltage difference and work normally.
Compared with the traditional conductive adhesive tape mode, the high dielectric constant medium has excellent insulating property, so that the voltage of the inner shielding pipe is far lower than that of the cable conductor/middle connecting pipe, the pressure difference between the inner shielding pipe and the outer shielding pipe and the stress cone is reduced, the radial electric breakdown resistance of the product is improved, the axial creepage resistance is improved, and the product can be made to be smaller in size.
Drawings
FIG. 1 is a schematic overall cross-sectional view of a cable temperature measurement type intermediate joint according to the present utility model;
FIG. 2 is a schematic cross-sectional view of the interior of the intermediate connector body of the present utility model;
fig. 3 is a schematic cross-sectional view of the inside of the high-voltage cable according to the present utility model.
Reference numerals in the drawings: 1. an intermediate joint body; 11. a stress cone; 12. an outer shielding layer I; 13. an insulating layer I; 14. a shielding tube; 2. a high voltage cable; 3. a passive temperature measuring ring; 31. an outer electrode layer; 32. an insulating layer II; 33. a flexible circuit board layer; 34. a thermoelectric couple layer; 35. an inner electrode layer; 4. an intermediate connecting pipe; 5. a high dielectric constant medium.
Detailed Description
The embodiment is given by fig. 1-3, a cable temperature measurement type intermediate joint, which comprises an intermediate joint main body 1, two high-voltage cables 2 and a passive temperature measurement ring 3, wherein the intermediate joint main body 1 is arranged between the two high-voltage cables 2, wire cores connected with the high-voltage cables 2 are mutually butted, an intermediate connecting pipe 4 is sleeved outside the intermediate connecting pipe, a high-dielectric constant medium 5 is wrapped outside the intermediate connecting pipe 4, and the passive temperature measurement ring 3 is arranged inside the high-dielectric constant medium 5 and is tightly sleeved on the wire cores of the high-voltage cables 2.
In this embodiment, the middle connector body 1 includes an outer shielding layer 1 12, the outer shielding layer 12 is disposed outside, an insulating layer 13 is disposed inside the outer shielding layer 12, two stress cones 11 are disposed on two sides of the insulating layer 13 and are in contact with two high-voltage cables 2 penetrating into the middle connector body 1, a shielding tube 14 is disposed in the middle of the insulating layer 13, and the high-dielectric constant medium 5 is wrapped
The high dielectric constant medium 5 is made of one of stress control band, stress evacuation cement and stress tube; the high dielectric constant material has high insulating property, can disperse the strength of an electric field, improves the electrical property of a product, is filled in a gap between a wire core and an intermediate joint, has no gap inside, and has the advantages of optimal stress evacuation cement effect, high viscosity and excellent filling effect.
In practical application, when the high dielectric constant medium 5 is stress control cement, due to the fact that the material characteristics are sticky, a plurality of layers of semi-conductive bands are wound on the surface of the stress control cement, the adhesion between the stress control cement and the middle joint main body 1 is effectively prevented, the construction difficulty is reduced, the stress control cement can be compacted in the winding process of the semi-conductive bands, the internal air gap is reduced, the installation effect is good, and the electrical performance of a product is improved.
Specifically, the cable conductor is high voltage (for example, 35 kV), the ground voltage of the outermost layer of the middle joint is 0, a stepped voltage is formed inside the middle joint, a voltage difference is generated between the inner electrode layer and the outer electrode layer 31, and the flexible circuit board layer 33 is powered, so that a probe of the thermocouple is controlled to detect the temperature of the cable core, the real-time temperature of the cable during operation is obtained, a signal is sent to an external wireless signal receiver through a wireless transmitting module, and then the terminal is sent to process.
In this embodiment, the middle part of the passive temperature measuring ring 3 is penetrated with a connecting hole, and is inserted with a wire core of the high voltage cable 2, the inner wall and the outer wall of the passive temperature measuring ring 3 are respectively an inner electrode layer 35 and an outer electrode layer 31, corners of the inner electrode layer 35 and the outer electrode layer 31 are chamfered, a flexible circuit board layer 33 and a thermocouple layer 34 are arranged inside the passive temperature measuring ring 3, a probe of the thermocouple layer 34 penetrates through the inner electrode layer 35 to be in contact with the wire core of the high voltage cable 2, and a gap interlayer between the inner electrode layer 35 and the outer electrode layer 31 is filled with a second insulating layer 32 for protection.
The corners of the inner electrode layer 35 and the outer electrode layer 31 are chamfered, so that the electric field strength is reduced under high voltage, and the electrical performance is improved.
Wherein, be provided with two or more passive temperature measurement ring 3, can realize detecting the temperature many times, improve the accuracy that the temperature detected.
The second insulating layer 32 is made of insulating material (rubber or resin) and protects the flexible circuit board layer 33 to ensure the internal insulating performance of the passive temperature measuring ring 3.
Wherein, the probe of the thermocouple layer 34 is in direct contact with the cable core to accurately acquire the temperature signal
Wherein the outer electrode layer 31 and the inner electrode layer 35 are electrically connected to the flexible circuit board layer 33 for supplying power, and the thermocouple layer 34 is also electrically connected to the flexible circuit board layer 33.
Wherein the flexible circuit board layer 33 is provided with a wireless transmitting module and is wirelessly connected with an external wireless signal receiver.
Specifically, the cable conductor is high voltage (for example, 35 kV), the ground voltage of the outermost layer of the middle joint is 0, a stepped voltage is formed inside the middle joint, a voltage difference is generated between the inner electrode layer and the outer electrode layer 31, and the flexible circuit board layer 33 is powered, so that a probe of the thermocouple is controlled to detect the temperature of the cable core, the real-time temperature of the cable during operation is obtained, a signal is sent to an external wireless signal receiver through a wireless transmitting module, and then the terminal is sent to process.
Working principle:
the two cable wires are peeled and connected inside the middle joint main body 1, and the wire cores of the two cable wires are contacted, wherein a high dielectric constant medium 5 is filled between an inner shielding pipe 14 of the middle joint main body 1 and a middle connecting pipe 4 (a cable wire core), the high dielectric constant is a nonlinear material, the high dielectric constant is very strong in insulating property in a certain voltage range, the voltage on the surface of the shielding pipe 14 is reduced, the pressure difference between an external shielding and a stress cone 11 is reduced, the performance of the middle joint can be ensured, and the passive temperature measuring ring 3 can acquire the voltage difference and work normally;
compared with the traditional conductive adhesive tape mode, the inner shielding pipe and the cable conductor/middle connecting pipe have the equipotential mode, and the high dielectric constant medium 5 has excellent insulating property, so that the voltage of the inner shielding pipe is far lower than that of the cable conductor/middle connecting pipe, the pressure difference between the inner shielding pipe and the outer shielding pipe and the stress cone is reduced, the radial electric breakdown resistance of the product is improved, the axial creepage resistance is improved, and the product can be made to be smaller in size;
the passive temperature measuring ring 3 performs detection work: the cable conductor is high voltage (35 kV for example), the grounding voltage of the outermost layer of the middle joint is 0, stepped voltage division is formed inside, voltage difference is generated between the inner electrode layer and the outer electrode layer 31, the flexible circuit board layer 33 is powered, so that a probe of the thermocouple is controlled to detect the temperature of a cable core, the real-time temperature of the cable in operation is obtained, signals are sent to an external wireless signal receiver through a wireless transmitting module, and then the terminals are sent to be processed.
Claims (6)
1. The utility model provides a cable temperature measurement formula intermediate head, includes intermediate head main part (1), two high tension cable (2) and passive temperature measurement ring (3), its characterized in that: the middle joint body (1) is arranged between two high-voltage cables (2), two wire cores connected with the high-voltage cables (2) are mutually butted, a middle connecting pipe (4) is sleeved outside the middle connecting pipe (4), a high-dielectric constant medium (5) is wrapped outside the middle connecting pipe (4), and at least one passive temperature measuring ring (3) is arranged inside the high-dielectric constant medium (5) and is tightly sleeved on the wire cores of the high-voltage cables (2).
2. The cable temperature measurement type intermediate head according to claim 1, wherein the intermediate head main body (1) comprises an outer shielding layer one (12), the outer shielding layer one (12) is arranged outside, an insulating layer one (13) is arranged inside the outer shielding layer one (12), stress cones (11) are arranged on two sides of the insulating layer one (13) and are contacted with two high-voltage cables (2) penetrating into the intermediate head main body (1), and a shielding tube (14) is arranged in the middle of the insulating layer one (13) to wrap the high-dielectric constant medium (5).
3. The cable temperature measurement type intermediate joint according to claim 1, wherein the high dielectric constant medium (5) is one of a stress control tape, a stress evacuation cement, or a stress tube.
4. The cable temperature measurement type intermediate joint according to claim 1, wherein the middle part of the passive temperature measurement ring (3) is penetrated with a connecting hole and is inserted with a wire core of the high-voltage cable (2), the inner wall and the outer wall of the passive temperature measurement ring (3) are respectively an inner electrode layer (35) and an outer electrode layer (31), corners of the inner electrode layer (35) and the outer electrode layer (31) are chamfered, a flexible circuit board layer (33) and a thermocouple layer (34) are arranged inside the passive temperature measurement ring (3), the thermocouple layer (34) is contacted with the wire core of the high-voltage cable (2) by penetrating through the inner electrode layer (35), and a gap interlayer between the inner electrode layer (35) and the outer electrode layer (31) is filled with a second insulating layer (32) for protection.
5. The cable temperature measurement type intermediate joint as claimed in claim 4, wherein the outer electrode layer (31) and the inner electrode layer (35) are electrically connected to the flexible circuit board layer (33) for supplying power, and the thermocouple layer (34) is also electrically connected to the flexible circuit board layer (33).
6. The cable thermometry intermediate connector according to claim 4, characterized in that the flexible circuit board layer (33) is provided with a wireless transmitting module and is connected wirelessly with an external wireless signal receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320622871.1U CN219659406U (en) | 2023-03-24 | 2023-03-24 | Cable temperature measurement type intermediate joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320622871.1U CN219659406U (en) | 2023-03-24 | 2023-03-24 | Cable temperature measurement type intermediate joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219659406U true CN219659406U (en) | 2023-09-08 |
Family
ID=87859150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320622871.1U Active CN219659406U (en) | 2023-03-24 | 2023-03-24 | Cable temperature measurement type intermediate joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219659406U (en) |
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2023
- 2023-03-24 CN CN202320622871.1U patent/CN219659406U/en active Active
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