CN112213001A - Built-in flexible temperature measuring device of cable joint - Google Patents
Built-in flexible temperature measuring device of cable joint Download PDFInfo
- Publication number
- CN112213001A CN112213001A CN202010843250.7A CN202010843250A CN112213001A CN 112213001 A CN112213001 A CN 112213001A CN 202010843250 A CN202010843250 A CN 202010843250A CN 112213001 A CN112213001 A CN 112213001A
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- cable
- screw rod
- hole
- stainless steel
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- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 31
- 239000010935 stainless steel Substances 0.000 claims abstract description 31
- 239000004020 conductor Substances 0.000 claims abstract description 30
- 239000010410 layer Substances 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 9
- 239000011241 protective layer Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 abstract description 6
- 210000001503 joint Anatomy 0.000 description 6
- 238000009529 body temperature measurement Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
- G01K1/143—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations for measuring surface temperatures
Abstract
The invention discloses a built-in flexible temperature measuring device of a cable joint, which comprises a cable intermediate joint, wherein a cable end connecting hole is arranged in the cable intermediate joint, a conductor connecting pipe is arranged in the cable end connecting hole, a fixed insulating layer and a movable insulating layer are arranged in the cable end connecting hole, a wireless passive flexible film temperature sensor is arranged between the inner surface of the fixed insulating layer and the outer surface of the conductor connecting pipe, a conductor connecting pipe fixing device is arranged on the outer surface of the movable insulating layer, the conductor connecting pipe fixing device comprises a first stainless steel positioning plate, a fixing screw rod and a locking nut, the inner surface of the first stainless steel positioning plate is fixedly bonded with the outer surface of the movable insulating layer, the middle position of the outer surface of the first stainless steel positioning plate is fixedly welded with the inner end. Above-mentioned technical scheme, structural design is reasonable, convenient to use, can all have good adaptability and practicality to the cable joint of various models.
Description
Technical Field
The invention relates to the technical field of cable joint temperature measurement, in particular to a built-in flexible temperature measuring device for a cable joint.
Background
Along with the continuous promotion of electrical equipment voltage level and the continuous increase of operating current, the equipment phenomenon of generating heat is showing more and more, when power equipment breaks down, often along with the change of temperature, so through the temperature monitoring to power equipment, especially its key position, can in time know power equipment's operating condition. When the temperature is abnormal, early warning can be timely given and the maintenance can be carried out, so that larger faults can be prevented.
For temperature monitoring of the cable intermediate head, it is required to be able to directly monitor the temperature of the core conductor. To meet this requirement, the following difficulties are mainly encountered: the internal space of the cable intermediate joint is extremely narrow, which has high requirements on the size of the sensor; the interior of the cable intermediate joint is in a strong electromagnetic field environment, and the sensor is required to be capable of stably operating under the working condition; devices placed in the middle joint of the cable cannot influence the electric field distribution in the middle joint, otherwise, the failure of the original structural design of the cable joint can be caused, and potential safety hazards are caused; the service life of the cable joint is generally 30 years, so the service life of the built-in temperature measuring device cannot be less than 30 years.
PCT patent CN105190268A, a system for monitoring the temperature of an electrical conductor enclosed in at least a (semi-) conductive layer. The system comprises: a wireless passive sensing unit, a transceiver unit and a control unit. The wireless passive sensing unit includes at least one temperature sensing part and is configured to have a resonance frequency and/or a Q value that varies with a temperature of the conductive body. The transceiver unit is configured to electromagnetically couple to the wireless passive inductive unit and emit a signal indicative of a resonant frequency and/or a Q value of the wireless passive inductive unit. The transceiver unit is further configured to communicate with a control unit that ascertains a signal indicative of one or both of the resonant frequency and the Q value, and determines a temperature value for the electrical conductor based on the ascertained signal indicative of one or both of the resonant frequency and the Q value. The sensor described in this patent is located between the connecting copper tube and the insulating layer, and the outer diameter size needs to be completely matched with the size of the cable insulating layer to meet the electrical performance requirement. This just causes this technical scheme can only be applicable to specific size's such as 110kV that the inner space is great cable intermediate head, when the cable joint of different models and producer of needs adaptation, then need carry out special design, has increased the popularization and application degree of difficulty of product.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the built-in flexible temperature measuring device for the cable joint, which has reasonable structural design, is convenient to use, can have good adaptability to various types of cable joints and has good practicability.
In order to achieve the purpose, the invention provides the following technical scheme: a flexible temperature measuring device arranged in a cable joint comprises a cable intermediate joint, wherein a cable end connecting hole is arranged in the cable intermediate joint, the cable end connecting hole is internally provided with a conductor connecting pipe, the cable end connecting hole is internally provided with a fixed insulating layer and a movable insulating layer, a wireless passive flexible film temperature sensor is arranged between the inner surface of the fixed insulating layer and the outer surface of the conductor connecting pipe, a conductor connecting pipe fixing device is arranged on the outer surface of the movable insulating layer and comprises a first stainless steel positioning plate, a fixing screw rod and a locking nut, the inner surface of the first stainless steel positioning plate is fixedly bonded with the outer surface of the movable insulating layer, the middle position of the outer surface of the first stainless steel positioning plate is fixedly welded with the inner end of the fixing screw rod, and the outer end of the fixing screw rod is in threaded connection with the locking nut.
The invention is further configured to: the cable intermediate head is provided with a first screw rod through hole in the radial direction aiming at the position of the fixing screw rod, a second stainless steel positioning plate is fixedly arranged on the outer surface of the cable intermediate head, and a second screw rod through hole is radially arranged in the position of the second stainless steel positioning plate aiming at the position of the first screw rod through hole.
The invention is further configured to: an annular groove is formed in the inner wall face of the second screw rod through hole, a sealing ring is arranged in the annular groove, the outer end of the fixing screw rod sequentially penetrates through the first screw rod through hole and the second screw rod through hole, and the fixing screw rod is sealed through the sealing ring and the inner wall face of the second screw rod through hole.
The invention is further configured to: the outer end of the fixing screw is provided with a screw through hole, and a stainless steel limiting part is arranged in the screw through hole in a penetrating mode.
The invention is further configured to: the stainless steel locating part is a limiting pin shaft or a limiting ring.
The invention is further configured to: and a third stainless steel positioning plate is fixedly bonded on the outer surface of the fixed insulating layer, and the outer surface of the third stainless steel positioning plate is fixedly connected with the inner wall surface of the cable end connecting hole.
The invention is further configured to: the outer surface of the cable intermediate joint is fixedly provided with a signal transceiving unit, one end of the signal transceiving unit is provided with a controller, the controller controls the signal transceiving unit to send a detection signal, the wireless passive flexible film temperature sensor sends a feedback signal according to the detection signal, the signal transceiving unit receives the feedback signal and transmits the signal to the controller, and the controller obtains the temperature of the cable intermediate joint according to the feedback signal transmitted by the signal transceiving unit.
The invention is further configured to: the controller is electrically connected with the signal receiving and transmitting unit through a lead, and batteries are arranged in the controller and the signal receiving and transmitting unit.
The invention is further configured to: the signal receiving and transmitting unit comprises a collector and a reader, the reader is electrically connected with the collector and used for sending detection signals and receiving feedback signals, and the collector is used for transmitting the feedback signals received by the reader to the controller.
The invention is further configured to: the wireless passive flexible film temperature sensor comprises a sensor body and a protective layer, wherein the protective layer is coated outside the sensor body, and the wireless passive flexible film temperature sensor is in a sheet shape or a cylindrical shape.
The invention has the advantages that: compared with the prior art, the structure of the invention is more reasonable, the wireless passive flexible film temperature sensor is arranged between the inner wall surface of the fixed insulating layer and the outer surface of the conductor connecting pipe, on one hand, the structure of the wireless passive flexible film temperature sensor does not need to be changed according to the size of the inner space of the conductor connecting pipe, and the fixing of the temperature sensor can be completed only by arranging the wireless passive flexible film temperature sensor outside the conductor connecting pipe, and the conductor connecting pipe is fastened by the conductor connecting pipe fixing device, so that the wireless passive flexible film temperature sensor has better adaptability to cable joints of different models of; on the other hand, the wireless passive flexible film temperature sensor can be closer to the conductor connecting pipe, so that heat conduction is facilitated, and temperature measurement is more accurate; the cable joint has the advantages of reasonable structural design, convenience in use, good adaptability to various types of cable joints and good practicability.
The invention is further described with reference to the drawings and the specific embodiments in the following description.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of section I of FIG. 1;
fig. 3 is a block diagram of a cable intermediate joint temperature measurement system according to an embodiment of the present invention.
Detailed Description
In the description of the present embodiment, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, 2 and 3, the invention discloses a flexible temperature measuring device with a built-in cable joint, which comprises a cable intermediate joint 1, wherein a cable end connecting hole 11 is arranged in the cable intermediate joint 1, a conductor connecting pipe 2 is arranged in the cable end connecting hole 11, a fixed insulating layer 12 and a movable insulating layer 13 are arranged in the cable end connecting hole 11, a wireless passive flexible film temperature sensor 3 is arranged between the inner surface of the fixed insulating layer 12 and the outer surface of the conductor connecting pipe 2, a conductor connecting pipe fixing device is arranged on the outer surface of the movable insulating layer 13, the conductor connecting pipe fixing device comprises a first stainless steel positioning plate 4, a fixed screw rod 5 and a locking nut 6, the inner surface of the first stainless steel positioning plate 4 is fixedly bonded with the outer surface of the movable insulating layer 13, the middle position of the outer surface of the first stainless steel positioning plate 4 is welded and fixed with the, the outer end of the fixing screw rod 5 is in threaded connection with the locking nut 6.
As preferred, make clamping screw 5 inwards remove through screwing lock nut 6, drive movable insulating layer 13 inwards remove through first stainless steel locating plate 4 to make the internal surface of movable insulating layer 13 compress tightly conductor connecting pipe 2's surface local position, simultaneously, make conductor connecting pipe 2 and wireless passive flexible film temperature sensor 3 be connected closely, the thermal conduction of being convenient for, the measurement of temperature is more accurate.
Preferably, a first screw through hole 14 is radially formed in the position, aligned with the fixing screw, of the cable intermediate joint 1, a second stainless steel positioning plate 7 is fixedly arranged on the outer surface of the cable intermediate joint 1, and a second screw through hole 71 is radially formed in the position, aligned with the first screw through hole 14, of the second stainless steel positioning plate 7.
In order to make the structure of the present invention more reasonable, preferably, an annular groove is formed on an inner wall surface of the second screw through hole 71, a sealing ring 8 is arranged in the annular groove, an outer end of the fixing screw 5 sequentially passes through the first screw through hole 14 and the second screw through hole 71, and the fixing screw 5 forms a seal with the inner wall surface of the second screw through hole 71 through the sealing ring 8.
The outer end of the fixing screw rod 5 is provided with a screw rod through hole 51, and a stainless steel limiting part 9 penetrates through the screw rod through hole 51. Preferably, the stainless steel limiting part 9 is a limiting pin or a limiting ring.
And a third stainless steel positioning plate 10 is fixedly bonded on the outer surface of the fixed insulating layer 12, and the outer surface of the third stainless steel positioning plate 10 is fixedly connected with the inner wall surface of the cable end connecting hole 11.
A signal transceiving unit 15 is fixedly arranged on the outer surface of the cable intermediate joint 1, a controller 16 is arranged at one end of the signal transceiving unit 15, the controller 16 controls the signal transceiving unit 15 to send a detection signal, the wireless passive flexible film temperature sensor 3 sends a feedback signal according to the detection signal, the signal transceiving unit 15 receives the feedback signal and transmits the signal to the controller 16, and the controller 16 obtains the temperature of the cable intermediate joint 1 according to the feedback signal transmitted by the signal transceiving unit.
The controller 16 and the signal transceiver 15 are electrically connected by a wire, and batteries are arranged in both the controller 16 and the signal transceiver 15.
The signal transceiver unit 15 includes a collector and a reader, the reader is electrically connected to the collector, the reader is used for sending a detection signal and receiving a feedback signal, and the collector is used for transmitting the feedback signal received by the reader to the controller 16.
The wireless passive flexible film temperature sensor 3 comprises a sensor body and a protective layer, wherein the protective layer is coated outside the sensor body, and the wireless passive flexible film temperature sensor 3 is in a sheet shape or a cylindrical shape.
In practical application, the wireless passive flexible film temperature sensor is arranged between the inner wall surface of the fixed insulating layer and the outer surface of the conductor connecting pipe, so that on one hand, the structure of the wireless passive flexible film temperature sensor does not need to be changed according to the size of the inner space of the conductor connecting pipe, and on the other hand, the wireless passive flexible film temperature sensor can be fixed only by being arranged outside the conductor connecting pipe; on the other hand, the wireless passive flexible film temperature sensor can be closer to the conductor connecting pipe, so that heat conduction is facilitated, and temperature measurement is more accurate; the cable joint has the advantages of reasonable structural design, convenience in use, good adaptability to various types of cable joints and good practicability.
The above embodiments are described in detail for the purpose of further illustrating the present invention and should not be construed as limiting the scope of the present invention, and the skilled engineer can make insubstantial modifications and variations of the present invention based on the above disclosure.
Claims (10)
1. The utility model provides a built-in flexible temperature measuring device of cable joint, includes cable intermediate head (1), be provided with cable end connecting hole (11) in cable intermediate head (1), be provided with conductor connecting pipe (2), its characterized in that in cable end connecting hole (11): the cable connecting structure is characterized in that a fixed insulating layer (12) and a movable insulating layer (13) are arranged in the cable end connecting hole (11), a wireless passive flexible film temperature sensor (3) is arranged between the inner surface of the fixed insulating layer (12) and the outer surface of the conductor connecting pipe (2), a conductor connecting pipe fixing device is arranged on the outer surface of the movable insulating layer (13), the conductor connecting pipe fixing device comprises a first stainless steel positioning plate (4), a fixing screw rod (5) and a locking nut (6), the inner surface of the first stainless steel positioning plate (4) is fixedly bonded with the outer surface of the movable insulating layer (13), the middle position of the outer surface of the first stainless steel positioning plate (4) is fixedly welded with the inner end of the fixing screw rod (5), and the outer end of the fixing screw rod (5) is in threaded connection with the.
2. The built-in flexible temperature measuring device of the cable joint as claimed in claim 1, wherein: the cable intermediate head (1) aims at the set screw position and radially is provided with first screw rod through-hole (14), the fixed second stainless steel locating plate (7) that is provided with on the surface of cable intermediate head (1), second stainless steel locating plate (7) aim at first screw rod through-hole (14) position and radially are provided with second screw rod through-hole (71).
3. The built-in flexible temperature measuring device of the cable joint as claimed in claim 2, wherein: an annular groove is formed in the inner wall face of the second screw rod through hole (71), a sealing ring (8) is arranged in the annular groove, the outer end of the fixing screw rod (5) sequentially penetrates through the first screw rod through hole (14) and the second screw rod through hole (71), and the fixing screw rod (5) is sealed through the sealing ring (8) and the inner wall face of the second screw rod through hole (71).
4. The built-in flexible temperature measuring device of the cable joint as claimed in claim 3, wherein: the outer end of the fixing screw rod (5) is provided with a screw rod through hole (51), and a stainless steel limiting part (9) penetrates through the screw rod through hole (51).
5. The built-in flexible temperature measuring device of the cable joint as claimed in claim 4, wherein: the stainless steel limiting part (9) is a limiting pin shaft or a limiting ring.
6. The built-in flexible temperature measuring device for the cable joint as claimed in claim 1 or 5, wherein: and a third stainless steel positioning plate (10) is fixedly bonded on the outer surface of the fixed insulating layer (12), and the outer surface of the third stainless steel positioning plate (10) is fixedly connected with the inner wall surface of the cable end connecting hole (11).
7. The built-in flexible temperature measuring device of the cable joint as claimed in claim 6, wherein: the temperature sensor is characterized in that a signal transceiving unit (15) is fixedly arranged on the outer surface of the cable intermediate joint (1), a controller (16) is arranged at one end of the signal transceiving unit (15), the controller (16) controls the signal transceiving unit (15) to send a detection signal, the wireless passive flexible film temperature sensor (3) sends a feedback signal according to the detection signal, the signal transceiving unit (15) receives the feedback signal and transmits the signal to the controller (16), and the controller (16) obtains the temperature of the cable intermediate joint (1) according to the feedback signal transmitted by the signal transceiving unit.
8. The built-in flexible temperature measuring device of the cable joint as claimed in claim 7, wherein: the controller (16) and the signal transceiving unit (15) are electrically connected through a lead, and batteries are arranged in the controller (16) and the signal transceiving unit (15).
9. The built-in flexible temperature measuring device of the cable joint as claimed in claim 8, wherein: the signal receiving and transmitting unit (15) comprises a collector and a reader, the reader is electrically connected with the collector and used for sending detection signals and receiving feedback signals, and the collector is used for transmitting the feedback signals received by the reader to the controller (16).
10. The built-in flexible temperature measuring device of the cable joint as claimed in claim 9, wherein: the wireless passive flexible film temperature sensor (3) comprises a sensor body and a protective layer, wherein the protective layer is coated outside the sensor body, and the wireless passive flexible film temperature sensor (3) is in a sheet shape or a cylindrical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010843250.7A CN112213001A (en) | 2020-08-20 | 2020-08-20 | Built-in flexible temperature measuring device of cable joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010843250.7A CN112213001A (en) | 2020-08-20 | 2020-08-20 | Built-in flexible temperature measuring device of cable joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112213001A true CN112213001A (en) | 2021-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010843250.7A Pending CN112213001A (en) | 2020-08-20 | 2020-08-20 | Built-in flexible temperature measuring device of cable joint |
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| Country | Link |
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| CN (1) | CN112213001A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206430821U (en) * | 2016-09-20 | 2017-08-22 | 南京科睿博电气科技有限公司 | A kind of passive and wireless temperature measurement system applied to HV cable accessories |
| CN108962475A (en) * | 2018-08-20 | 2018-12-07 | 安徽新科电缆集团股份有限公司 | A kind of anticorrosion fire safe type cable |
| CN110261001A (en) * | 2019-06-28 | 2019-09-20 | 浙江荷清柔性电子技术有限公司 | Cable intermediate joint temperature measurement system |
| CN210071151U (en) * | 2019-06-28 | 2020-02-14 | 浙江荷清柔性电子技术有限公司 | Cable intermediate head temperature measuring device and cable intermediate head based on microwave resonance |
| CN210180558U (en) * | 2019-06-28 | 2020-03-24 | 浙江荷清柔性电子技术有限公司 | SAW resonance-based cable intermediate joint temperature measuring device and cable intermediate joint |
| WO2020154860A1 (en) * | 2019-01-28 | 2020-08-06 | Abb Schweiz Ag | Bushing, cable accessory, system, method for assembling bushing and method for assembling cable accessory |
-
2020
- 2020-08-20 CN CN202010843250.7A patent/CN112213001A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206430821U (en) * | 2016-09-20 | 2017-08-22 | 南京科睿博电气科技有限公司 | A kind of passive and wireless temperature measurement system applied to HV cable accessories |
| CN108962475A (en) * | 2018-08-20 | 2018-12-07 | 安徽新科电缆集团股份有限公司 | A kind of anticorrosion fire safe type cable |
| WO2020154860A1 (en) * | 2019-01-28 | 2020-08-06 | Abb Schweiz Ag | Bushing, cable accessory, system, method for assembling bushing and method for assembling cable accessory |
| CN110261001A (en) * | 2019-06-28 | 2019-09-20 | 浙江荷清柔性电子技术有限公司 | Cable intermediate joint temperature measurement system |
| CN210071151U (en) * | 2019-06-28 | 2020-02-14 | 浙江荷清柔性电子技术有限公司 | Cable intermediate head temperature measuring device and cable intermediate head based on microwave resonance |
| CN210180558U (en) * | 2019-06-28 | 2020-03-24 | 浙江荷清柔性电子技术有限公司 | SAW resonance-based cable intermediate joint temperature measuring device and cable intermediate joint |
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Application publication date: 20210112 |