CN116678503B - Temperature measuring device and temperature measuring method for transformer - Google Patents
Temperature measuring device and temperature measuring method for transformer Download PDFInfo
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- CN116678503B CN116678503B CN202310978204.1A CN202310978204A CN116678503B CN 116678503 B CN116678503 B CN 116678503B CN 202310978204 A CN202310978204 A CN 202310978204A CN 116678503 B CN116678503 B CN 116678503B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000523 sample Substances 0.000 claims abstract description 54
- 238000009413 insulation Methods 0.000 claims abstract description 36
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 27
- 230000000694 effects Effects 0.000 claims abstract description 14
- 210000001503 joint Anatomy 0.000 claims abstract description 6
- 230000006835 compression Effects 0.000 claims description 24
- 238000007906 compression Methods 0.000 claims description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 22
- 239000003677 Sheet moulding compound Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- 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
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- 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
- G01K1/08—Protective devices, e.g. casings
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- 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
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- Testing Electric Properties And Detecting Electric Faults (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a temperature measuring device and a temperature measuring method of a transformer, which are used for measuring the temperature of a low-voltage outlet pile head of the transformer, wherein the device comprises a sensor main body, an insulating board and an insulating column which are connected in sequence; a temperature measurement probe which can extend out to the end part of the insulating heat insulation column and is in butt joint with the low-voltage outlet pile head is arranged in the insulating heat insulation column, and the temperature measurement probe is in signal connection with the sensor main body; the outer side wall of the insulating and heat-insulating column is also provided with an annular chute, and a plurality of telescopic connecting pieces capable of sliding along the annular chute are arranged in the annular chute in a sliding manner; each telescopic connecting piece comprises an adjusting screw sleeve assembly. The temperature measuring method is realized based on the temperature measuring device. The utility model has the technical characteristics of simple and stable installation, good temperature measurement effect and safe use.
Description
Technical Field
The utility model relates to the technical field of power grid equipment, in particular to a temperature measuring device and a temperature measuring method of a transformer.
Background
The transformer is used as important voltage conversion equipment in a power system, the number of transformers in network operation in China is about 1700 ten thousand, and the total capacity is about 110 hundred million kilovolts.
During the use process of the transformer, common faults such as circuit faults, winding faults, oil seepage faults, high-temperature faults and the like are accompanied, and the faults can lead to the damage or rejection of the transformer, wherein the frequency of the occurrence of the high-temperature faults is higher.
The high-temperature faults are mostly generated in the current-carrying joints of the transformer, the current-carrying joints of the transformer always bear extremely important responsibility in the design of the whole transformer, and the analysis and summarization of the power accidents can obtain: the unstable connection of the current carrying connector of the transformer, particularly the low-voltage outlet connector, leads to the rapid temperature rise at the connector, even exceeds the ignition point of the connector, leads to the phenomenon of burning out of the connector, and seriously affects the safe and stable operation of the power transformer.
In order to effectively reduce the occurrence of such safety accidents and avoid the safety power consumption accidents caused by overhigh temperature at the joint, a temperature sensor is adopted to detect the temperature of the joint in the prior art, and temperature data are timely acquired through temperature detection, so that the safety power consumption accidents can be rapidly processed, and the safe and stable operation of the power transformer is effectively ensured.
The utility model patent with the patent number of 202121983522.X and the name of a real-time monitoring device for the temperature of a transformer pile head provides a joint temperature measuring device, and the functions of displaying, alarming and the like can be performed by acquiring the temperature through a temperature sensor and then performing data, so that the effective temperature measurement is realized.
But in the prior art, the main structure of the joint temperature measuring device is mostly bundled and installed on a circuit connected with the low-voltage outlet joint, and the temperature measuring probe is mostly bundled and installed on the side surface of the low-voltage outlet joint, and the temperature measuring probe and the joint temperature measuring device are connected through the circuit, so that: 1. the transformer has slight vibration in operation, so that the temperature measuring probe is easy to shift after being installed for a long time, thereby falling off or separating from a detection position, the continuous temperature measuring effect of the temperature measuring probe can be influenced, and the temperature measuring probe is influenced by vibration and wind power, the binding positions of the main body structure and the temperature measuring probe are changed, and the temperature measuring probe can be mutually influenced to be pulled, so that the position change of the main body structure and the temperature measuring probe can be possibly caused, the measurement can be possibly influenced, the measurement failure can be possibly caused, and a circuit between the main body structure and the temperature measuring probe can be possibly contacted with a connector to further generate fusing and ignition risks; 2. when the temperature is measured, the temperature measuring probe is contacted with the low-voltage outlet connector and the outside air, so that the temperature measuring area is greatly influenced by the outside, hysteresis and errors exist in the test result, and the sensor cannot measure the temperature in time and quickly obtain data; 3. the main structure is fixed on the circuit, and in the long-term use process, the main structure is possibly influenced by gravity and wind power, so that the trend or the installation position of the circuit is changed, the bending degree of the circuit is changed, the problem of stress concentration at the junction of the circuit and the outgoing copper bar on one side of the low-voltage outgoing connector is caused, and the circuit is extremely easy to break from the outgoing copper bar position to influence power transmission.
Furthermore, the joint temperature measuring device in the prior art has more defects in the installation and use processes, the defects can not only affect the temperature measurement, but also affect the normal operation of the transformer, and in order to ensure the normal operation of the temperature measurement and the normal operation of the transformer, the problems above need to be solved.
Disclosure of Invention
The utility model aims to provide a temperature measuring device of a transformer, which has the technical characteristics of simple and stable installation, good temperature measuring effect and safe use. Meanwhile, the utility model also provides a temperature measuring method of the transformer based on the temperature measuring device of the transformer.
The aim of the utility model is mainly realized by the following technical scheme: a temperature measuring device of a transformer is used for measuring the temperature of a low-voltage outlet pile head of the transformer and comprises a sensor main body, an insulating board and an insulating column which are connected in sequence; a temperature measuring probe which can extend out to the end part of the insulating heat insulation column and is in butt joint with the low-voltage outlet pile head is arranged in the insulating heat insulation column, and the temperature measuring probe is in signal connection with the sensor main body; the outer side wall of the insulating and heat-insulating column is also provided with an annular chute, and a plurality of telescopic connecting pieces capable of sliding along the annular chute are arranged in the annular chute in a sliding manner; each telescopic connecting piece comprises an adjusting screw sleeve assembly, and the adjusting screw sleeve assemblies are used for: and the bolt is in threaded connection with the bolt at the joint of the low-voltage outlet pile head and the outlet copper bar in a pairing way.
Based on the technical scheme, one end of the insulating heat insulation column is in threaded connection with the insulating heat insulation plate, the other end of the insulating heat insulation column is concavely formed with an installation cavity, and the inner wall of the installation cavity is provided with a limiting step at the position of the opening; the temperature measuring probe is arranged in the mounting cavity and can partially extend out to the end part of the insulating and heat-insulating column under the limit of the limit step; and an elastic piece is arranged in the mounting cavity and is abutted between the bottom of the mounting cavity and the temperature measuring probe.
Based on the technical scheme, the upper end of the insulating heat insulation plate is also connected with the electromagnetic shielding cover, the sensor main body is positioned inside the electromagnetic shielding cover, and the signal wire of the temperature measurement probe sequentially penetrates through the insulating heat insulation column, the insulating heat insulation plate and is in signal connection with the sensor main body inside the electromagnetic shielding cover.
Based on the technical scheme, the outer side wall of the insulating column is further connected with a first compression screw sleeve in a threaded manner, and the first compression screw sleeve can rotate along the length direction of the insulating column along with threads to compress the telescopic connecting piece.
Based on above technical scheme, the telescopic connection piece includes sliding connection in annular spout slider, with slider integrated into one piece's joint board, with the inserted connection board of accepting the board grafting, the inserted connection board still rotates and is connected with the adapter sleeve, the regulation swivel nut subassembly rotates and connects in the adapter sleeve.
Based on the technical scheme, the adjusting screw sleeve assembly comprises a cylinder rotationally connected in the connecting sleeve, two ends of the cylinder extend out of the connecting sleeve and are respectively connected with a knob and an internal thread sheath, and the internal thread sheath is used for being in threaded connection with the bolt in a matching mode.
Based on the technical scheme, the outside of the internal thread sheath is also sleeved with a jacking sleeve capable of sliding along the cylinder, and the length of the jacking sleeve is greater than that of the internal thread sheath.
Based on the technical scheme, the end part of the bearing plate is concavely provided with a bearing groove, and the plug plate can be inserted into the bearing groove; the side wall of the bearing plate is also provided with a through groove communicated with the bearing groove, and the through groove is in threaded connection with a tightening bolt for tightening the plug plate.
Based on the technical scheme, the side wall of the connecting sleeve is provided with a ball head, the end part of the plug board is provided with a ball head groove, and the ball head is clamped in the ball head groove and can be universally adjusted in the ball head groove; the outer wall of the end part of the plugboard is also connected with a second compression screw sleeve in a threaded manner, and the second compression screw sleeve can rotate along the length direction of the plugboard along with the threads so as to compress the connecting sleeve.
Based on the technical scheme, the insulating board, the insulating column and the adjusting screw sleeve assembly are all made of sheet molding compound.
Compared with the prior art, the utility model has the following beneficial effects: according to the utility model, the sensor main body and the temperature measuring probe can be integrally connected through the insulating heat insulation column, the adjusting screw sleeve assembly is adjusted to be matched with the bolt at the joint of the low-voltage outlet pile head and the outlet copper bar through the telescopic connecting piece, so that the stable connection of the whole equipment is realized by utilizing the bolt at the joint of the low-voltage outlet pile head and the outlet copper bar, the insulating heat insulation column and the adjusting screw sleeve assembly are integrally used as supporting pieces to support the whole sensor main body structure, the installation is simple and convenient, the integral structure is stable after the installation, the insulating heat insulation of the sensor main body is ensured through the insulating heat insulation plate and the insulating heat insulation column, the use is safer, the insulating heat insulation column insulates the temperature measuring probe, so that the temperature measuring probe is not influenced by external environment any more during temperature measurement, the temperature measuring data is more accurate, the temperature measuring probe circuit is wrapped in the temperature measuring probe circuit, the circuit protection can be better, the temperature measuring probe can be continuously contacted with the low-voltage outlet pile head under the action of the elastic piece in the use process, the continuous effective temperature measuring effect can be further ensured.
The utility model also discloses a temperature measuring method of the transformer based on the temperature measuring device for the transformer, which is used for measuring the temperature of the low-voltage outlet pile head of the transformer and comprises the following steps:
s1, placing an insulating and heat-insulating column at a design position of the side wall of a low-voltage outlet pile head, and ensuring that the end part of the insulating and heat-insulating column is abutted against the side wall of the low-voltage outlet pile head;
s2, adjusting the telescopic connecting pieces to slide along the annular sliding grooves, so that each telescopic connecting piece corresponds to a bolt at the joint of the low-voltage outlet pile head and the outlet copper bar respectively, and locking the first compression screw sleeve;
s3, adjusting the plug-in length of the bearing plate and the plug-in plate, and locking the jack bolt;
s4, rotating the adjusting screw sleeve assembly to enable the adjusting screw sleeve assembly to be coaxial with a corresponding bolt, locking the second compression screw sleeve, rotating the adjusting screw sleeve assembly to enable the internal thread sheath to be in threaded pairing connection with the bolt, and stopping after the jacking sleeve and the connecting sleeve are jacked tightly;
s5, testing the signal paths and the temperature measuring effect of the temperature measuring probe and the sensor main body, and installing an electromagnetic shielding cover after testing is completed, so that temperature measurement can be achieved.
According to the temperature measuring method of the transformer, the integrated sensor main body and the temperature measuring probe are integrally arranged on the bolt at the joint of the low-voltage outlet pile head and the outlet copper bar, so that the assembly and disassembly are convenient and stable, the temperature measuring probe is little influenced by the external environment, continuous and effective temperature measuring operation can be realized, and the method has a good application prospect.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:
FIG. 1 is a schematic diagram of the overall structure of a temperature measuring device of an inventive transformer;
FIG. 2 is an assembly schematic diagram of the whole structure of a temperature measuring device of the transformer, wherein a knob, a connecting sleeve and a tightening sleeve are tightly tightened with each other;
FIG. 3 is a schematic view of the structure of an insulating column;
FIG. 4 is a schematic view of the structure of the telescopic link;
FIG. 5 is a schematic structural view of the adjuster screw assembly;
FIG. 6 is a front view of the split construction of the telescopic link;
FIG. 7 is a top view of a split construction of the telescopic link;
the reference numerals in the figures are respectively expressed as:
1. a sensor body; 2. an insulating panel; 3. insulating heat insulation columns; 4. a temperature measurement probe; 5. an annular chute; 6. a telescoping connection; 7. adjusting the swivel nut assembly; 8. a mounting cavity; 9. a limit step; 10. an elastic member; 11. an electromagnetic shield; 12. a signal line; 13. the first compression screw sleeve; 14. a slide block; 15. a receiving plate; 16. a plug board; 17. connecting sleeves; 18. a column; 19. a knob; 20. an internally threaded sheath; 21. tightly jacking the sleeve; 22. a receiving groove; 23. a through groove; 24. a jack bolt; 25. ball head; 26. a ball groove; 27. and the second compression screw sleeve.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.
As shown in fig. 1 and 2, a first embodiment of the present utility model provides a temperature measuring device for a transformer, which is used for measuring temperature of a low-voltage outlet pile head a of the transformer, and comprises a sensor main body 1, an insulating board 2 and an insulating column 3 which are sequentially connected; a temperature probe 4 which can extend out to the end part of the insulating heat insulation column 3 and is in butt joint with the low-voltage outlet pile head A is arranged in the insulating heat insulation column 3, and the temperature probe 4 is in signal connection with the sensor main body 1; the outer side wall of the insulating and heat-insulating column 3 is also provided with an annular chute 5, and a plurality of telescopic connecting pieces 6 which can slide along the annular chute 5 are arranged in the annular chute 5 in a sliding manner; each telescopic connecting piece 6 comprises an adjusting screw sleeve assembly 7, and the adjusting screw sleeve assemblies 7 are used for: and the bolt C is in threaded connection with the bolt C at the joint of the low-voltage outlet pile head A and the outlet copper bar B in a pairing way.
When the device is applied, the insulating heat insulation column 3 is vertically arranged on the side face of the low-voltage outlet pile head A among the bolts C in an integral mode, the insulating heat insulation column is located in the middle of the low-voltage outlet pile head A as much as possible, so that even temperature measurement is achieved, after the insulating heat insulation column is placed, the telescopic connection pieces 6 are adjusted to slide along the annular sliding grooves 5 based on the positions of the bolts C which are needed to be matched, each adjusting screw sleeve assembly 7 is ensured to correspond to one bolt C independently, the horizontal position of each adjusting screw sleeve assembly 7 can be adjusted through the telescopic connection piece 6 if necessary, the adjusting screw sleeve assemblies 7 are matched with the corresponding bolts C in a threaded mode after the installation of the integral device is completed, and the temperature measurement probe 4 is abutted to the side face of the low-voltage outlet pile head A at the moment, so that continuous temperature measurement can be achieved on the low-voltage outlet pile head A.
Based on this, this embodiment can realize through insulating heat-insulating column 3 that sensor main part 1 and temperature probe 4 an organic whole connect to adjust the bolt C of swivel nut subassembly 7 junction with low pressure outlet stub A and outlet copper bar B through telescopic connection spare 6 and pair, and then utilize bolt C to realize the firm connection of whole equipment, insulating heat-insulating column 3, adjust swivel nut subassembly 7 whole as support piece support whole sensor main part 1, simple installation, and the overall structure is firm after the installation, and ensure the insulating and heat-insulating of sensor main part 1 through insulating heat-insulating board 2 and insulating heat-insulating column 3's insulating and heat-insulating effect, use safelyr, insulating heat-insulating column 3 is with temperature probe 4 is isolated including, make it no longer receive external environment influence when the temperature measurement, temperature measurement data is more accurate, temperature probe 4 circuit package is including simultaneously, also can be better carry out circuit protection.
As shown in fig. 3, one end of the insulating heat insulation column 3 is in threaded connection with the insulating board 2, the other end of the insulating heat insulation column is concavely formed with a mounting cavity 8, and a limiting step 9 is further arranged on the inner wall of the mounting cavity 8 at the opening position; the temperature measuring probe 4 is arranged in the mounting cavity 8 and can extend to the end part of the insulating heat insulation column 3 at the limit lower part of the limit step 9; an elastic piece 10 is further arranged in the mounting cavity 8, and the elastic piece 10 is abutted between the bottom of the mounting cavity 8 and the temperature measuring probe 4.
The insulating heat insulation column 3 can be installed in through the installation cavity 8 with the temperature measurement probe 4, when in use, because the installation cavity 8 opening position is blocked by the side face of the low-voltage outlet pile head A, the temperature measurement probe 4 is less influenced by external environment, the temperature measurement precision and effect of the temperature measurement probe can be ensured, and simultaneously under the elastic force of the elastic piece 10 which is always in a compressed state, the temperature measurement probe 4 can be continuously abutted to the side face of the low-voltage outlet pile head A, so that continuous temperature measurement is realized, and the influence caused by transformer vibration is reduced.
It should be noted that, in this embodiment, the temperature measuring probe 4 is generally a part of the temperature measuring end, i.e. the working end, of the temperature measuring probe 4 that contacts with the side surface of the low-voltage outlet pile head a to achieve temperature measurement, so that at least the part of the temperature measuring probe 4 that contacts with the low-voltage outlet pile head a should be the working end of the temperature measuring probe 4, and the purpose of the utility model can be achieved.
In a specific application, the elastic member 10 is a telescopic spring.
With continued reference to fig. 1-3, in some embodiments, the upper end of the insulating board 2 is further connected with an electromagnetic shielding cover 11, the sensor main body 1 is located inside the electromagnetic shielding cover 11, and the signal wire 12 of the temperature probe 4 sequentially penetrates through the insulating column 3 and the insulating board 2 and is in signal connection with the sensor main body 1 inside the electromagnetic shielding cover 11. The electromagnetic shield 11 can isolate the electromagnetic influence of the transformer and ensure the normal use of the sensor body 1. Specifically, the electromagnetic shield 11 is molded from conductive rubber.
In some embodiments, the outer side wall of the insulating and insulating column 3 is further connected with a first compression screw sleeve 13 in a threaded manner, and the first compression screw sleeve 13 can rotate along the length direction of the insulating and insulating column 3 along with the threads so as to compress the telescopic connecting piece 6. When the telescopic connecting piece 6 is used, the outer wall of the insulating heat insulation column 3 is provided with external threads along the length direction, the first compression screw sleeve 13 is matched with the external threads in a threaded manner, after the telescopic connecting piece 6 is adjusted, the first compression screw sleeve 13 can be rotated to move towards the telescopic connecting piece 6, and then the telescopic connecting piece 6 is compressed, so that the telescopic connecting piece 6 can be positioned firmly and is not loosened after being installed, and when the telescopic connecting piece 6 needs to be readjusted, only the first compression screw sleeve 13 needs to be rotated reversely.
As shown in fig. 4, the telescopic connecting piece 6 includes a sliding block 14 slidably connected in the annular chute 5, a receiving plate 15 integrally formed with the sliding block 14, and a plug board 16 inserted into the receiving plate 15, the plug board 16 is further rotatably connected with a connecting sleeve 17, and the adjusting screw sleeve assembly 7 is rotatably connected in the connecting sleeve 17.
When the low-voltage outlet pile head is used, as two rows of bolts C are arranged at intervals at the joint of the low-voltage outlet pile head A and the outlet copper bar B, the number of the bolts C in each row is 3-5 unequal and are arranged at intervals, so that when the insulating heat insulation column 3 is positioned in the middle of the low-voltage outlet pile head A, the horizontal distance between each adjusting screw sleeve assembly 7 and the corresponding bolt C is unequal, the horizontal position of each adjusting screw sleeve assembly 7 is independently realized by designing the telescopic connecting piece 6, so that the adjusting screw sleeve assembly can be matched with the corresponding bolt C, and the embodiment is specific: the sliding block 14 slides along the annular sliding groove 5 until the adjusting screw sleeve assembly 7 is approximately positioned in the direction of the corresponding bolt C, the length of the adjusting plug board 16 inserted into the bearing board 15 is adjusted, the length after the adjusting plug board and the bearing board are connected is adjusted, the adjusting screw sleeve assembly 7 is adjusted until the adjusting screw sleeve assembly is approximately positioned above the bolt C, the adjusting screw sleeve assembly 7 and the bolt C are coaxial through rotating the connecting sleeve 17, and the matching installation of the adjusting screw sleeve assembly 7 and the bolt C can be realized.
As shown in fig. 5, the adjusting screw sleeve assembly 7 comprises a cylinder 18 rotatably connected in the connecting sleeve 17, two ends of the cylinder 18 extend out of the connecting sleeve 17 and are respectively connected with a knob 19 and an internal thread sheath 20, and the internal thread sheath 20 is used for being in threaded connection with the bolt C in a matching way. When the screw sleeve is used, the knob 19 rotates the internal thread sheath 20 to be in threaded pairing with the bolt C, so that the whole adjusting screw sleeve assembly 7 can be paired with the bolt C, and the fixation of the whole structure is realized.
Because the cylinder 18 is rotationally connected in the connecting sleeve 17, when the adjusting screw sleeve assembly 7 is installed, the cylinder 18 and the connecting sleeve 17 are not restrained in the axial direction, and the insulating and insulating column 3 may shift, so that the insulating and insulating column 3 cannot be better abutted against the low-voltage outlet pile head A, thereby affecting the stability and the temperature measurement effect of the device, therefore, in the embodiment, the outer side of the internal thread sheath 20 is further sleeved with the tightening sleeve 21 capable of sliding along the cylinder 18, and the length of the tightening sleeve 21 is longer than that of the internal thread sheath 20. Furthermore, when the internal thread sheath 20 is screwed in, one end of the tightening sleeve 21 is abutted against the nut of the bolt C or the side surface of the low-voltage outlet pile head A, after the tightening sleeve 21 is screwed in a certain distance, the knob 19 can be abutted against the upper end of the connecting sleeve 17, so that the whole column 18 is tightly tightened and cannot axially move, the stable installation effect of the insulating heat insulation column 3 and the temperature measuring probe 4 is ensured, the column 18 can be further prevented from rotating, the internal thread sheath 20 is ensured not to loosen after being assembled, and the anti-loosening effect is achieved.
As shown in fig. 6 and 7, the end of the receiving plate 15 is concavely formed with a receiving groove 22, and the plug plate 16 can be inserted into the receiving groove 22; the side wall of the receiving plate 15 is also provided with a through groove 23 communicated with the receiving groove 22, and the through groove 23 is in threaded connection with a tightening bolt 24 for tightening the plug-in plate 16. When carrying out board 15 and plugboard 16, the two at least grafting parts can be set to the platykurtic to be convenient for peg graft and prevent to rotate, also be convenient for jack bolt 24 top fastening simultaneously is fixed to the relative position after peg graft through jack bolt 24 top fastening also can guarantee both pegging graft, carries out the controllable flexible regulation and the fixed of realization telescopic connection piece, and when implementing, plugboard 16 can change the length of inserting in accepting groove 22, and then changes the horizontal interval of adjusting swivel nut subassembly 7, makes it can be better with corresponding bolt C position pair.
With continued reference to fig. 5, a ball head 25 is provided on the side wall of the connecting sleeve 17, a ball head groove 26 is provided at the end of the plug board 16, and the ball head 25 is clamped in the ball head groove 26 and can be adjusted in the ball head groove 26 in a universal manner; the outer wall of the end part of the plugboard 16 is also in threaded connection with a second compression screw sleeve 27, and the second compression screw sleeve 27 can rotate along the length direction of the plugboard 16 along with the threads so as to compress the connecting sleeve 17.
In implementation, since there is a certain error in the installation position of the bolt C and there is a small eccentricity (i.e. not perpendicular to the side surface of the insulating and heat-insulating column 3 installed on the low-voltage outlet pile head a), so that the internal thread sheath 20 cannot be well coaxially matched with the bolt C, and the internal stress of the internal thread sheath 20 or the bolt C is not uniform after the internal thread sheath is not installed or installed, the adjusting screw sleeve assembly 7 of the embodiment is rotationally connected in the connecting sleeve 17, and the coaxial condition of the adjusting screw sleeve assembly and the bolt C can be adjusted by rotating the connecting sleeve 17: the connecting sleeve 17 is universally adjusted in the ball groove 26 by utilizing the ball 25, so that the internal thread sheath 20 in the connecting sleeve 17 rotates to be coaxial or basically coaxial with the bolt C, then the connecting sleeve 17 is pressed by the second pressing screw sleeve 27 after the installation is finished, so that the pressing connecting sleeve 17 is locked and cannot rotate, namely, the connecting sleeve 17 can be ensured not to rotate to influence the connection stability after the installation while the effective pairing installation is realized, and the installation effect is further ensured.
It should be noted that, the ball head 25 has a spherical structure, which can form a connecting rod to connect with the connecting sleeve 17 or be integrally formed, the ball head groove 26 is a spherical groove body matched with the ball head 25, the diameter of the spherical groove body is slightly larger than that of the ball head 25, and then the ball head 25 can be universally adjusted in the ball head groove 26, wherein the opening of the ball head groove 26 for the ball head 25 to extend into can be adjusted according to the adjusting direction, and meanwhile, the opening size is kept smaller than the diameter of the ball head 25.
In a specific application, the insulating board 2, the insulating column 3 and the adjusting screw sleeve assembly 7 are all made of sheet molding compound. The sheet molding compound has higher insulativity, heat insulation and mechanical strength, and the insulating heat-insulating plate 2, the insulating heat-insulating column 3 and the adjusting screw sleeve assembly 7 are formed by the sheet molding compound, so that the insulating heat-insulating effect of the insulating heat-insulating plate 2 and the insulating heat-insulating column 3 can be ensured, and meanwhile, the adjusting screw sleeve assembly 7 can also have good connection strength.
The foregoing is the entire content of the temperature measuring device of the transformer, and for better understanding and implementation, the second embodiment of the present utility model is further based on the temperature measuring device of the transformer, and provides a temperature measuring method of the transformer, for measuring the temperature of the low-voltage outlet pile head a of the transformer, where the temperature measuring method includes the following steps:
s1, placing an insulating and heat-insulating column 3 at a design position of the side wall of a low-voltage outlet pile head A, and ensuring that the end part of the insulating and heat-insulating column 3 is abutted against the side wall of the low-voltage outlet pile head A;
in this step, in order to facilitate the installation, the insulating board 2 may be detached first, and then installed after the step S4 is completed, so that the installation of the insulating column 3, the telescopic connector 6 and the adjusting screw sleeve assembly 7 may be facilitated.
S2, adjusting the telescopic connecting pieces 6 to slide along the annular sliding groove 5, so that each telescopic connecting piece 6 corresponds to a bolt C at the joint of the low-voltage outlet pile head A and the outlet copper bar B respectively and locks the first compression screw sleeve 13;
in this step, the first compression sleeve 13 may be locked again after the completion of step S4, so that the position adjustment range may be further increased when the female screw sheath 20 is installed.
S3, adjusting the plugging length of the bearing plate 15 and the plug plate 16, and locking the jack bolt 24;
s4, rotating the adjusting screw sleeve assembly 7 to keep coaxial with the corresponding bolt C, locking the second compression screw sleeve 27, rotating the adjusting screw sleeve assembly 7 to enable the internal thread sheath 20 to be in threaded pairing connection with the bolt C, and stopping after the jacking sleeve 21 and the connecting sleeve 17 are jacked;
s5, testing the signal paths and the temperature measuring effect of the temperature measuring probe 4 and the sensor main body 1, and installing the electromagnetic shielding cover 11 after testing is finished, so that temperature measurement can be achieved.
Based on this, the temperature measuring method of the embodiment utilizes the integrated sensor main body 1 and the temperature measuring probe 4 to be integrally arranged on the bolt C at the joint of the low-voltage outlet pile head A and the outlet copper bar B, so that the assembly and disassembly are convenient and stable, the temperature measuring probe 4 is little influenced by the external environment, continuous and effective temperature measuring operation can be realized, and the method has a better application prospect.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
Claims (8)
1. The temperature measuring device of the transformer is used for measuring the temperature of a low-voltage outlet pile head of the transformer and is characterized by comprising a sensor main body, an insulating board and an insulating column which are connected in sequence;
wherein,,
a temperature measurement probe which can extend out to the end part of the insulating heat insulation column and is in butt joint with the low-voltage outlet pile head is arranged in the insulating heat insulation column, and the temperature measurement probe is in signal connection with the sensor main body;
the outer side wall of the insulating and heat-insulating column is also provided with an annular chute, and a plurality of telescopic connecting pieces capable of sliding along the annular chute are arranged in the annular chute in a sliding manner;
each telescopic connecting piece comprises an adjusting screw sleeve assembly, and the adjusting screw sleeve assemblies are used for: the bolt is in matched threaded connection with the connection part of the low-voltage outgoing line pile head and the outgoing line copper bar;
the telescopic connecting piece comprises a sliding block, a bearing plate and a plug plate, wherein the sliding block is connected in the annular sliding groove in a sliding way, the bearing plate is integrally formed with the sliding block, the plug plate is spliced with the bearing plate, the plug plate is also rotationally connected with a connecting sleeve, and the adjusting screw sleeve assembly is rotationally connected in the connecting sleeve;
the adjusting screw sleeve assembly comprises a cylinder rotationally connected in the connecting sleeve, two ends of the cylinder extend out of the connecting sleeve and are respectively connected with a knob and an internal thread sheath, and the internal thread sheath is used for being in threaded connection with the bolt in a matching manner.
2. The temperature measuring device according to claim 1, wherein one end of the insulating heat insulation column is in threaded connection with the insulating heat insulation plate, the other end of the insulating heat insulation column is concavely formed with a mounting cavity, and a limiting step is further arranged on the inner wall of the mounting cavity at the opening position;
the temperature measuring probe is arranged in the mounting cavity and can partially extend out to the end part of the insulating and heat-insulating column under the limit of the limit step;
and an elastic piece is arranged in the mounting cavity and is abutted between the bottom of the mounting cavity and the temperature measuring probe.
3. The temperature measuring device according to claim 1, wherein the upper end of the insulating board is further connected with an electromagnetic shielding cover, the sensor main body is located inside the electromagnetic shielding cover, and the signal wire of the temperature measuring probe sequentially penetrates through the insulating heat insulation column and the insulating board and is in signal connection with the sensor main body inside the electromagnetic shielding cover.
4. The temperature measuring device of claim 1, wherein the outer side wall of the insulating column is further connected with a first compression screw in a threaded manner, and the first compression screw can rotate along the length direction of the insulating column along with the threads to compress the telescopic connecting piece.
5. The temperature measuring device of claim 1, wherein the outer side of the internally threaded sheath is further sleeved with a tightening sleeve capable of sliding along the column, and the length of the tightening sleeve is greater than that of the internally threaded sheath.
6. The temperature measuring device according to claim 1, wherein the end portion of the receiving plate is concavely formed with a receiving groove, into which the inserting plate is insertable;
the side wall of the bearing plate is also provided with a through groove communicated with the bearing groove, and the through groove is in threaded connection with a tightening bolt for tightening the plug plate.
7. The temperature measuring device according to claim 6, wherein a ball head is arranged on the side wall of the connecting sleeve, a ball head groove is arranged at the end part of the plug board, and the ball head is clamped in the ball head groove and can be universally adjusted in the ball head groove;
the outer wall of the end part of the plugboard is also connected with a second compression screw sleeve in a threaded manner, and the second compression screw sleeve can rotate along the length direction of the plugboard along with the threads so as to compress the connecting sleeve.
8. A method for measuring the temperature of a transformer, for measuring the temperature of a low-voltage outlet stub of the transformer, which is realized based on the temperature measuring device of the transformer according to claim 7, characterized in that the method comprises the following steps:
s1, placing an insulating and heat-insulating column at a design position of the side wall of a low-voltage outlet pile head, and ensuring that the end part of the insulating and heat-insulating column is abutted against the side wall of the low-voltage outlet pile head;
s2, adjusting the telescopic connecting pieces to slide along the annular sliding grooves, so that each telescopic connecting piece corresponds to a bolt at the joint of the low-voltage outlet pile head and the outlet copper bar respectively, and locking the first compression screw sleeve;
s3, adjusting the plug-in length of the bearing plate and the plug-in plate, and locking the jack bolt;
s4, rotating the adjusting screw sleeve assembly to enable the adjusting screw sleeve assembly to be coaxial with a corresponding bolt, locking the second compression screw sleeve, rotating the adjusting screw sleeve assembly to enable the internal thread sheath to be in threaded pairing connection with the bolt, and stopping after the jacking sleeve and the connecting sleeve are jacked tightly;
s5, testing the signal paths and the temperature measuring effect of the temperature measuring probe and the sensor main body, and installing an electromagnetic shielding cover after testing is completed, so that temperature measurement can be achieved.
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| CN202310978204.1A CN116678503B (en) | 2023-08-04 | 2023-08-04 | Temperature measuring device and temperature measuring method for transformer |
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