CN220670738U - Device for detecting temperature of cable joint in ring main unit in real time - Google Patents
Device for detecting temperature of cable joint in ring main unit in real time Download PDFInfo
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- CN220670738U CN220670738U CN202322115221.0U CN202322115221U CN220670738U CN 220670738 U CN220670738 U CN 220670738U CN 202322115221 U CN202322115221 U CN 202322115221U CN 220670738 U CN220670738 U CN 220670738U
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- 239000003990 capacitor Substances 0.000 claims abstract description 47
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 36
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 239000000523 sample Substances 0.000 claims description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000011897 real-time detection Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
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- Arrangements For Transmission Of Measured Signals (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model relates to a device for detecting the temperature of a cable joint in a ring main unit in real time, which comprises: the temperature measurement plug sensor is arranged on a cable connector in the ring main unit; the low-voltage acquisition terminal is arranged in the ring main unit, and is electrically connected with the temperature measurement plug sensor in a wireless mode; the remote transmission terminal is arranged outside the ring main unit and supplies power to the low-voltage acquisition terminal at low voltage; the temperature measurement plug sensor comprises a mounting head, a plurality of voltage division capacitors, a transformer, a rectifying circuit, a voltage stabilizing circuit, a temperature measuring component and a high-voltage capacitor, wherein the mounting head, the voltage division capacitors and the high-voltage capacitor are connected in series, a primary coil of the transformer is connected with one of the voltage division capacitors in parallel, and a secondary coil of the transformer, the rectifying circuit, the voltage stabilizing circuit and the temperature measuring component are connected in series in sequence. The cable connector in the ring main unit can be subjected to real-time temperature measurement in a high-voltage direct electricity taking mode, and high-voltage and low-voltage isolation is not needed.
Description
Technical Field
The utility model relates to the technical field of power distribution networks, in particular to a device for detecting the temperature of a cable joint in a ring main unit in real time.
Background
In the existing medium-voltage distribution network, most of faults in a ring main unit are caused by poor contact of cable heads or insulation breakdown, so that a line short circuit and even a serious result of explosion are finally formed. However, the cable head heats up before the final major accident occurs. The temperature is used for predicting faults, so that a technical means which is important at present is realized.
The existing temperature measurement technology mainly comprises the following steps:
1. the outside of the cable accessory is indirectly measured in temperature. The technology is used for measuring temperature outside the accessories of the cable connector, such as wireless induction power-taking temperature measurement, battery power supply temperature measurement, infrared temperature measurement and the like.
The technical route is that the monitored indirect temperature is not the direct temperature of the cable head, and the fault problem cannot be well reflected. And because of the power supply problem, the temperature of the cable accessory cannot be measured in real time.
2. The cable head fastening bolt directly measures the temperature. The temperature is measured by arranging a temperature measuring chip in the cable head.
Although the technology monitors the direct temperature of the cable head, the RFID antenna can only be used for power supply, and the RFID power supply antenna can not supply power for the bolt chip due to the problem of the rotation angle during nut installation.
In the above technology, power supply is often a very important point limiting the application effect, and the difficulty of direct power supply is high because the cable connector is on the high-voltage side (the cable connector of the 10kV line has a voltage to ground of approximately 6 kV), and the temperature of the cable connector needs to be directly measured. However, if low voltage power is used, it must be isolated from high voltage, but this makes it impossible to directly measure the cable head problem. Moreover, the temperature measurement precision error of the existing temperature measurement technology is larger.
In view of this, the present utility model is to solve the above problems.
Disclosure of Invention
Therefore, the present utility model is directed to a device for detecting the temperature of a cable joint in a ring main unit in real time, which can accurately measure the temperature of the cable joint in the ring main unit by directly taking electricity at high voltage in the ring main unit, and does not need to perform high-low voltage isolation, so as to solve the problems in the prior art.
A device for detecting in real time the temperature of a cable joint in a ring main unit, comprising:
the temperature measurement plug sensor is arranged on a cable connector in the ring main unit;
the low-voltage acquisition terminal is arranged in the ring main unit, and is electrically connected with the temperature measurement plug sensor in a wireless mode;
the remote transmission terminal is arranged outside the ring main unit and is electrically connected with the low-voltage acquisition terminal, and the remote transmission terminal supplies power to the low-voltage acquisition terminal at low voltage;
the temperature measurement plug sensor comprises a mounting head, a plurality of voltage division capacitors, a transformer, a rectifying circuit, a voltage stabilizing circuit, a temperature measurement component and a high-voltage capacitor, wherein the temperature measurement plug sensor is mounted on the cable connector through the mounting head, the voltage division capacitors and the high-voltage capacitor are connected in series, a primary coil of the transformer is connected with one of the voltage division capacitors in parallel, and a secondary coil of the transformer, the rectifying circuit, the voltage stabilizing circuit and the temperature measurement component are sequentially connected in series.
Preferably, the mounting head is a high-voltage copper piece.
Preferably, the temperature measuring assembly further comprises a shell, wherein the shell is provided with a rear cover, and the front end of the shell is a conical head;
the conical head is internally provided with the mounting head.
Preferably, the housing is made of an epoxy material.
Preferably, the shell is internally provided with the plurality of voltage dividing capacitors, the transformer, the rectifying circuit, the voltage stabilizing circuit, the high-voltage capacitor, the first circuit board and the second circuit board;
the voltage division capacitor is welded on the first circuit board, the first circuit board is connected to the rear cover, the voltage division capacitor is arranged between the first circuit board and the rear cover, the second circuit board is connected with the mounting head, the second circuit board is provided with an inner cavity, and the transformer is arranged in the inner cavity and connected with the second circuit board;
the high-voltage capacitor is positioned between the first circuit board and the second circuit board and is respectively connected with the first circuit board and the second circuit board.
Preferably, the temperature measuring component comprises a temperature measuring probe, an RF chip and a microprocessor, wherein the microprocessor is respectively and electrically connected with the temperature measuring probe and the RF chip;
the temperature measuring assembly is electrically connected with the mounting head through a temperature measuring probe.
Preferably, one end of the temperature measuring probe is connected in the mounting head, and the other end of the temperature measuring probe is connected with the second circuit board;
the RF chip and microprocessor are connected to the first circuit board.
Preferably, the rectifying circuit and the voltage stabilizing circuit are arranged on the second circuit board.
Preferably, a shielding cover is further arranged in the shell, is connected to the rear cover, and surrounds and contains the voltage dividing capacitor, the first circuit board and the voltage capacitor.
Preferably, the rear cover is further connected with a signal output cable and a grounding cable, and the signal output cable is connected with the first circuit board.
The beneficial effects are that:
the device of real-time detection looped netowrk cabinet interior cable joint temperature in this application is through carrying out exquisite reasonable design and overall arrangement to it, and temperature measurement end cap sensor can directly get the mode of electricity through the high pressure and carry out real-time temperature measurement to cable joint in the looped netowrk cabinet, then come out data transmission through micropower wireless mode, and need not to carry out high-low pressure isolation to cable joint's in the looped netowrk cabinet heating signal acquisition data is accurate real-time high-efficient, convenient to use.
Drawings
The above and other objects, features and advantages of the present utility model will become more apparent from the following description of embodiments of the present utility model with reference to the accompanying drawings.
Fig. 1 shows a schematic structural diagram of an apparatus for detecting a temperature of a cable joint in a ring main unit in real time according to an embodiment of the present utility model.
Fig. 2 shows a schematic diagram of a temperature measuring plug sensor according to an embodiment of the utility model.
Fig. 3 shows a schematic structural diagram of a temperature measuring plug sensor according to an embodiment of the utility model.
In the figure:
temperature measurement plug sensor 1, installation head 11, voltage division capacitor 12, transformer 13, rectifier circuit 14, voltage stabilizing circuit 15, temperature measurement subassembly 16, temperature measurement probe 161, RF chip 162, microprocessor 163, high voltage capacitor 17, shell 181, back cover 1811, cone 1812, first circuit board 182, second circuit board 183, shield 19, signal output cable 1001, ground cable 1002, inlay nut 1003, low voltage acquisition terminal 2, remote transmission terminal 3, ring main unit 4.
Detailed Description
Various embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts. For clarity, the various features of the drawings are not drawn to scale.
As shown in fig. 1 to 3, the present utility model provides a device for detecting the temperature of a cable joint in a ring main unit 4 in real time, which comprises a temperature measuring plug sensor 1, a low voltage acquisition terminal 2 and a remote transmission terminal 3. The temperature measurement plug sensor 1 is arranged on a cable joint in the ring main unit 4; the low-voltage acquisition terminal 2 is arranged in the ring main unit 4, and the low-voltage acquisition terminal 2 is electrically connected with the temperature measurement plug sensor 1 in a wireless mode; the remote transmission terminal 3 is arranged outside the ring main unit 4, the remote transmission terminal 3 is electrically connected with the low-voltage acquisition terminal 2, and the remote transmission terminal 3 supplies power to the low-voltage acquisition terminal 2 at low voltage; the temperature measurement plug sensor 1 comprises a mounting head 11, a plurality of voltage division capacitors 12, a transformer 13, a rectifying circuit 14, a voltage stabilizing circuit 15, a temperature measuring component 16 and a high-voltage capacitor 17, wherein the temperature measurement plug sensor 1 is mounted on a cable joint through the mounting head 11, the voltage division capacitors and the high-voltage capacitor 17 are connected in series, a primary coil of the transformer 13 is connected with one of the voltage division capacitors in parallel, and a secondary coil of the transformer 13, the rectifying circuit 14, the voltage stabilizing circuit 15 and the temperature measuring component 16 are sequentially connected in series. Because the remote transmission terminal 3 is arranged outside the ring main unit 4, the low-voltage acquisition terminal 2 can be powered without isolation.
In this embodiment, the temperature measurement plug sensor 1 can set up a plurality of as required, gathers the signal that generates heat of a plurality of cable joints, and the installation head 11 is high-pressure copper spare, and it is equipped with the screw hole for will be used for the device of real-time detection ring main unit 4 interior cable joint temperature to twist on the cable joint, thereby realize the heat conduction between cable joint and the sensor, realize the collection of temperature measurement plug sensor 1 to the signal that generates heat of cable joint. By the elaborate design of the temperature measuring plug sensor 1, the high voltage of the cable joint can be processed to become a voltage adapted to the temperature measuring assembly 16.
Referring to fig. 3, the temperature measuring assembly 16 further includes a housing 181, the housing 181 is provided with a rear cover 1811, the front end of the housing 181 is a conical head 1812, and the conical head 1812 is provided with a mounting head 11, and in this embodiment, the housing 181 may be made of an insulating material such as an epoxy material.
The case 181 is provided therein with a plurality of voltage dividing capacitors 12, a transformer 13, a rectifying circuit 14, a voltage stabilizing circuit 15, and a high voltage capacitor 17, and a first circuit board 182 and a second circuit board 183. The voltage division capacitor is welded on the first circuit board 182, the first circuit board 182 is connected to the rear cover 1811, the voltage division capacitor is arranged between the first circuit board 182 and the rear cover 1811, the second circuit board 183 is connected with the mounting head 11, the second circuit board 183 is provided with an inner cavity, and the transformer 13 is arranged in the inner cavity and connected with the second circuit board; the high-voltage capacitor 17 is located between the first circuit board 182 and the second circuit board 183, and is connected to the first circuit board 182 and the second circuit board 183, respectively.
The temperature measuring assembly 16 includes a temperature measuring probe 161, an RFRF chip 162, and a microprocessor 163, wherein the microprocessor 163 is electrically connected to the temperature measuring probe 161 and the RFRF chip 162, and the temperature measuring assembly 16 is electrically connected to the mounting head 11 through the temperature measuring probe 161. One end of the temperature probe 161 is connected to the inside of the mounting head 11, and the other end is connected to the second circuit board 183; the RFRF chip 162 and the microprocessor 163 are connected to the first circuit board 182, the rectifying circuit and the voltage stabilizing circuit 15 are arranged on the second circuit board 183, the voltage stabilizing circuit 15 adopts the 3.3V voltage stabilizing circuit 15, and the RFRF chip 162 is used between the temperature measuring plug sensor 1 and the low voltage acquisition terminal 2. Micropower wireless communication is adopted between the temperature measurement plug sensor 1 and the low-voltage acquisition terminal 2, and 485 communication is adopted between the low-voltage acquisition terminal 2 and the remote transmission terminal 3.
In this embodiment, the microprocessor 163 is a MUC, the microprocessor 163 is configured to convert analog signals collected by the temperature probe 161 into digital signals, the first circuit board 182 and the second circuit board 183 are PCB boards, corresponding electronic components can be soldered on the PCB boards, the high-voltage capacitor 17 is made of ceramic material, and the shielding case 19 is made of metal material for shielding interference of high-voltage environment to signals. The voltage dividing capacitors can be arranged in a plurality according to the needs, and the voltage dividing capacitors are specifically arranged according to the specific structural size of the shielding cover 19, and the temperature measuring probe 161 is cylindrical.
Further, a shielding case 19 is further disposed in the housing 181, and the shielding case 19 is connected to the rear cover 1811 and surrounds the voltage dividing capacitor, the first circuit board 182 and the voltage capacitor. A signal output cable 1001 and a ground cable 1002 are also connected to the rear cover 1811, and the signal output cable 1001 is connected to the first circuit board 182.
Specifically, a mosaic nut 1003 is further disposed in the housing 181, the shielding case 19 is connected to the inner wall of the housing 181 through the mosaic nut 1003, the rear cover 1811 is abutted to the outer wall of the housing 181, and fastening bolts sequentially pass through the rear cover 1811, the housing 181 and the shielding case 19 from the outside and are screwed into the mosaic nut 1003, so that the rear cover 1811, the housing 181 and the shielding case 19 are connected. Ground cable 1002 and signal output cable 1001 are both connected to rear cover 1811. The temperature probe 161 is connected with the second circuit board 183 through a connecting bolt, and the second circuit board 183 is also connected with the high-voltage capacitor 17 through a connecting bolt.
The device for detecting the temperature of the cable joint in the ring main unit 4 in real time in this embodiment can refer to the following principle in use:
when the temperature measuring plug sensor 1 is used, the temperature measuring plug sensors 1 are screwed on cable connectors in the ring main units 4 through the mounting heads 11, the temperature measuring plug sensors 1 transmit temperature signals acquired by the temperature measuring plug sensors to the low-voltage acquisition terminals 2, the low-voltage acquisition terminals 2 process and collect received signals and transmit the signals to the remote transmission terminals 3, and the remote transmission terminals 3 collect data of the low-voltage acquisition terminals 2 in the ring main units 4 and transmit the data to the background master station system.
The device of real-time detection looped netowrk cabinet 4 interior cable joint temperature in this application is through carrying out exquisite reasonable design and overall arrangement to it, and temperature measurement end cap sensor 1 can directly get the mode of electricity through the high pressure and carry out real-time temperature measurement to the cable joint in the looped netowrk cabinet 4, then come out data transmission through micropower wireless mode, and need not to carry out high low pressure isolation to the signal acquisition data that generates heat of cable joint in the looped netowrk cabinet 4 is accurate real-time high-efficient, convenient to use.
It should be noted that in this document relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it is apparent that the above examples are only illustrative of the present utility model and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.
Claims (10)
1. A device for detecting in real time the temperature of a cable joint in a ring main unit, comprising:
the temperature measurement plug sensor is arranged on a cable connector in the ring main unit;
the low-voltage acquisition terminal is arranged in the ring main unit, and is electrically connected with the temperature measurement plug sensor in a wireless mode;
the remote transmission terminal is arranged outside the ring main unit and is electrically connected with the low-voltage acquisition terminal, and the remote transmission terminal supplies power to the low-voltage acquisition terminal at low voltage;
the temperature measurement plug sensor comprises a mounting head, a plurality of voltage division capacitors, a transformer, a rectifying circuit, a voltage stabilizing circuit, a temperature measurement component and a high-voltage capacitor, wherein the temperature measurement plug sensor is mounted on the cable connector through the mounting head, the voltage division capacitors and the high-voltage capacitor are connected in series, a primary coil of the transformer is connected with one of the voltage division capacitors in parallel, and a secondary coil of the transformer, the rectifying circuit, the voltage stabilizing circuit and the temperature measurement component are sequentially connected in series.
2. The device for detecting the temperature of a cable joint in a ring main unit in real time according to claim 1, wherein the mounting head is a high-voltage copper piece.
3. The device for detecting the temperature of the cable joint in the ring main unit in real time according to claim 1, wherein the temperature measuring assembly further comprises a housing, the housing is provided with a rear cover, and the front end of the housing is a conical head;
the conical head is internally provided with the mounting head.
4. A device for detecting the temperature of a cable joint in a ring main unit in real time as recited in claim 3, wherein the housing is made of an epoxy material.
5. The device for detecting the temperature of the cable joint in the ring main unit in real time according to claim 3, wherein the plurality of voltage dividing capacitors, the transformer, the rectifying circuit, the voltage stabilizing circuit and the high voltage capacitor, and the first circuit board and the second circuit board are arranged in the shell;
the voltage division capacitor is welded on the first circuit board, the first circuit board is connected to the rear cover, the voltage division capacitor is arranged between the first circuit board and the rear cover, the second circuit board is connected with the mounting head, the second circuit board is provided with an inner cavity, and the transformer is arranged in the inner cavity and connected with the second circuit board;
the high-voltage capacitor is positioned between the first circuit board and the second circuit board and is respectively connected with the first circuit board and the second circuit board.
6. The device for detecting the temperature of the cable joint in the ring main unit in real time according to claim 5, wherein the temperature measuring component comprises a temperature measuring probe, an RF chip and a microprocessor, and the microprocessor is electrically connected with the temperature measuring probe and the RF chip respectively;
the temperature measuring assembly is electrically connected with the mounting head through a temperature measuring probe.
7. The device for detecting the temperature of the cable joint in the ring main unit in real time according to claim 6, wherein one end of the temperature measuring probe is connected to the inside of the mounting head, and the other end is connected to the second circuit board;
the RF chip and microprocessor are connected to the first circuit board.
8. The device for detecting the temperature of the cable joint in the ring main unit according to claim 5, wherein the rectifying circuit and the voltage stabilizing circuit are arranged on the second circuit board.
9. The device for detecting the temperature of the cable joint in the ring main unit in real time according to claim 5, wherein a shielding case is further arranged in the shell, and the shielding case is connected to the rear cover and surrounds the voltage dividing capacitor, the first circuit board and the voltage capacitor.
10. The device for detecting the temperature of the cable joint in the ring main unit in real time according to claim 5, wherein the rear cover is further connected with a signal output cable and a grounding cable, and the signal output cable is connected with the first circuit board.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223347258 | 2022-12-13 | ||
| CN2022233472588 | 2022-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220670738U true CN220670738U (en) | 2024-03-26 |
Family
ID=90329797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322115221.0U Active CN220670738U (en) | 2022-12-13 | 2023-08-07 | Device for detecting temperature of cable joint in ring main unit in real time |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220670738U (en) |
-
2023
- 2023-08-07 CN CN202322115221.0U patent/CN220670738U/en active Active
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