CN212965252U - Built-in partial discharge sensor - Google Patents
Built-in partial discharge sensor Download PDFInfo
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- CN212965252U CN212965252U CN202021633638.6U CN202021633638U CN212965252U CN 212965252 U CN212965252 U CN 212965252U CN 202021633638 U CN202021633638 U CN 202021633638U CN 212965252 U CN212965252 U CN 212965252U
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Abstract
The utility model discloses a sensor is put in built-in office, including the installation apron, the upper end middle part of installation apron is equipped with connecting groove, be equipped with first annular groove on connecting groove's the tank bottom wall, the outside distribution of first annular groove has a plurality of second mounting holes, it has the sensor safety cover to peg graft in the connecting groove, through screw fixed mounting between second mounting hole and the third mounting hole, the centre bore in-connection has the adapter, the jump ring inslot is equipped with the jump ring, the downside threaded connection of jump ring has ceramic substrate, be equipped with piezoceramics and signal processor in the sensor safety cover. The utility model discloses the installation is more firm, and sealed effect is better, sets up the polytetrafluoroethylene insulating layer through the lateral wall at the sensor safety cover, can further protect this device not disturbed by strong electric field, can not cause the inside ultrasonic sensor erroneous judgement of sensor safety cover, and measurement accuracy is higher.
Description
Technical Field
The utility model relates to an electric power detects technical field, and concrete field is a sensor is put in built-in office.
Background
In general, there are various defects in the insulation of electric power equipment, and these defects are caused by various impurities, moisture, air gaps, etc. contained in a solid or liquid medium, and the electric field distribution at the defective portions is concentrated more than at other portions. The primary manifestation of the early stage of an insulation failure in a gas insulated fully enclosed switchgear (GIS) is partial discharge. Therefore, the defects of the GIS can be found as early as possible by detecting the partial discharge of the GIS, so that the safe and reliable operation of the GIS is ensured. In the prior art, a partial discharge sensor is arranged in a GIS cavity, and the partial discharge of the GIS is diagnosed by detecting an electromagnetic wave signal radiated by an ns-level discharge pulse in SF 6. The existing built-in local sensor is easily interfered by an electric field when in existence, so that the ultrasonic sensor is misjudged to cause the defect of inaccurate measurement.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a sensor is put in built-in office to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a built-in partial discharge sensor comprises an installation cover plate, wherein a plurality of first installation holes are distributed at the edge of the installation cover plate, the device is installed in GIS equipment through installation screws in the first installation holes of the installation cover plate, a connecting groove is arranged in the middle of the upper end of the installation cover plate, a first annular groove is arranged on the bottom wall of the connecting groove, a plurality of second installation holes are distributed on the outer side of the first annular groove, a sensor protection cover is inserted in the connecting groove, a connecting bottom plate is arranged on the lower surface of the sensor protection cover, an annular bulge is arranged at the position of the connecting bottom plate corresponding to the first annular groove, sealant is smeared between the first annular groove and the annular bulge during installation to ensure the sealing effect, a plurality of third installation holes are distributed at the position of the connecting bottom plate corresponding to the second installation holes, and the second installation holes and the third installation holes are fixedly installed through screws, the middle part of the installation cover plate is provided with a center hole, an adapter is connected in the center hole, the top part of the inner side wall of the sensor protection cover is provided with a clamp spring groove, a clamp spring is arranged in the clamp spring groove, the lower side of the clamp spring is connected with a ceramic substrate in a threaded manner, piezoelectric ceramics and a signal processor are arranged in the sensor protection cover, when the piezoelectric ceramics and the signal processor inside the sensor protection cover are maintained or repaired, the clamp spring is taken out from the clamp spring groove by using a tool, the ceramic substrate is taken off from the sensor protection cover by using the tool, the piezoelectric ceramics and the signal processor inside the sensor protection cover can be conveniently maintained or repaired, the piezoelectric ceramics are arranged on the lower surface of the ceramic substrate, the piezoelectric ceramics are electrically connected with the signal processor, one end of an output line is connected on the signal processor, and the other end of the output line, when insulating defect appears in GIS equipment inside, can produce partial discharge under the strong electric field effect, partial discharge can produce multiple physics phenomenon, and the ultrasonic wave of wherein producing passes through SF6 gaseous transmission to piezoceramics, and piezoceramics converts ultrasonic wave into the signal processing ware with the signal transmission and handles, and the output line transmission on the signal processing ware goes out.
Preferably, the sensor protection cover is filled with epoxy resin and sound absorbing material.
Preferably, open slots are formed in two ends of the ceramic substrate, and the ceramic substrate can be conveniently mounted on or taken down from the sensor protection cover through the open slots.
Preferably, the side wall of one side that first annular groove and annular bulge are close to mutually all is the cusp setting, is the cusp setting and can lets between first annular groove and the annular bulge adhesion strength big, uses this device installation more firm, and sealed effect is better.
Preferably, the lower surface of the installation cover plate is provided with a second annular groove on the inner side of the first installation hole, and the GIS equipment and the installation cover plate are installed through the sealing ring arranged in the second annular groove.
Preferably, the lateral wall of sensor safety cover is equipped with the polytetrafluoroethylene insulating layer, can further protect this device not disturbed by strong electric field, can not cause the inside ultrasonic sensor erroneous judgement of sensor safety cover, and measurement accuracy is higher.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a built-in partial discharge sensor, when maintaining or maintaining the inside piezoceramics of sensor safety cover and signal processor, use tools takes out the jump ring from the jump ring inslot, take off ceramic substrate from the sensor safety cover, can conveniently maintain or maintain the inside piezoceramics of sensor safety cover and signal processor, it can let to paste intensity between first annular groove and the annular protrusion big to be the cusp setting, it is more firm to use this device installation, sealed effect is better, set up the polytetrafluoroethylene insulating layer through the lateral wall at the sensor safety cover, can further protect this device not receive strong electric field interference, can not cause the inside ultrasonic sensor erroneous judgement of sensor safety cover, measurement accuracy is higher.
Drawings
FIG. 1 is a schematic sectional view of the present invention;
fig. 2 is a schematic top view of the mounting cover plate of the present invention;
fig. 3 is a schematic top view of the sensor protection cover of the present invention;
fig. 4 is an enlarged schematic view of a portion a in fig. 1.
In the figure: the method comprises the following steps of 1-mounting a cover plate, 2-first mounting holes, 3-connecting grooves, 4-first annular grooves, 5-second mounting holes, 6-sensor protective covers, 7-annular protrusions, 8-connecting bottom plates, 9-third mounting holes, 10-central holes, 11-snap springs, 12-ceramic substrates, 13-piezoelectric ceramics, 14-signal processors, 15-output lines, 16-second annular grooves, 17-polytetrafluoroethylene insulating layers and 18-adapters.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a built-in partial discharge sensor comprises a mounting cover plate 1, wherein a plurality of first mounting holes 2 are distributed at the edge of the mounting cover plate 1, the device is mounted in GIS equipment through mounting screws in the first mounting holes 2 of the mounting cover plate 1, a connecting groove 3 is arranged in the middle of the upper end of the mounting cover plate 1, a first annular groove 4 is arranged on the bottom wall of the connecting groove 3, a plurality of second mounting holes 5 are distributed at the outer side of the first annular groove 4, a sensor protection cover 6 is inserted in the connecting groove 3, a connecting bottom plate 8 is arranged on the lower surface of the sensor protection cover 6, an annular bulge 7 is arranged at the position of the connecting bottom plate 8 corresponding to the first annular groove 4, sealant is smeared between the first annular groove 4 and the annular bulge 7 during mounting to ensure the sealing effect, a plurality of third mounting holes 9 are distributed at the position of the connecting bottom plate 8 corresponding to the second mounting holes 5, the sensor protective cover is characterized in that the second mounting hole 5 and the third mounting hole 9 are fixedly mounted through screws, a central hole 10 is formed in the middle of the mounting cover plate 1, an adapter 18 is connected into the central hole 10, a clamp spring groove is formed in the top of the inner side wall of the sensor protective cover 6, a clamp spring 11 is arranged in the clamp spring groove, a ceramic substrate 12 is connected to the lower side of the clamp spring 11 in a threaded manner, piezoelectric ceramics 13 and a signal processor 14 are arranged in the sensor protective cover 6, when the piezoelectric ceramics 13 and the signal processor 14 in the sensor protective cover 6 are maintained or repaired, the clamp spring 11 is taken out of the clamp spring groove by using a tool, the ceramic substrate 12 is taken down from the sensor protective cover 6 by using the tool, the piezoelectric ceramics 13 and the signal processor 14 in the sensor protective cover 6 can be conveniently maintained or repaired, and the piezoelectric ceramics 13 are arranged on the lower, piezoceramics 13 and signal processor 14 electric connection, be connected with the one end of output line 15 on the signal processor 14, the other end of output line 15 extends to the outside through centre bore 10 and adapter 18, when GIS equipment is inside to appear insulating defect, can produce partial discharge under the strong electric field effect, partial discharge can produce multiple physical phenomenon, and the ultrasonic wave that wherein produces passes through SF6 gas transmission to piezoceramics 13, and piezoceramics 13 converts the ultrasonic wave into the signal transmission for signal processor 14 and handles, transmits away through output line 15 on the signal processor 14.
Specifically, the sensor protection cover 6 is filled with epoxy resin and a sound absorbing material.
Specifically, open grooves are formed at two ends of the ceramic substrate 12, and the ceramic substrate 12 can be conveniently mounted on or taken down from the sensor protection cover 6 through the open grooves.
Particularly, the lateral wall of one side that first annular groove 4 and annular bulge 7 are close to mutually all is the cusp setting, and it can let between first annular groove 4 and the annular bulge 7 paste intensity big to be the cusp setting, uses this device installation more firm, and sealed effect is better.
Specifically, the lower surface of the installation cover plate 1 is provided with a second annular groove 16 on the inner side of the first installation hole 2, and a seal ring is arranged in the second annular groove 16 to seal between the GIS equipment and the installation cover plate 1 during installation.
Particularly, the outer side wall of the sensor protection cover 6 is provided with the polytetrafluoroethylene insulation layer 17, so that the device can be further protected from being interfered by a strong electric field, the misjudgment of the ultrasonic sensor in the sensor protection cover 6 can not be caused, the anti-interference performance is good, and the measurement precision is higher.
The working principle is as follows: when the utility model is used, the device is arranged in the GIS equipment through the mounting screws in the first mounting holes 2 of the mounting cover plate 1, when insulation defects occur in GIS equipment, partial discharge can be generated under the action of a strong electric field, and various physical phenomena can be generated by the partial discharge, the ultrasonic wave generated in the ultrasonic wave generator is transmitted to the piezoelectric ceramic 13 through SF6 gas, the piezoelectric ceramic 13 converts the ultrasonic wave into an electric signal and transmits the electric signal to the signal processor 14 for processing, the electric signal is transmitted out through an output line 15 on the signal processor 14, when maintenance or repair is performed on the piezoelectric ceramics 13 and the signal processor 14 inside the sensor protection cover 6, the clamp spring 11 is taken out of the clamp spring groove by using a tool, and the ceramic substrate 12 is taken off from the sensor protection cover 6 by using the tool, so that the piezoelectric ceramic 13 and the signal processor 14 in the sensor protection cover 6 can be maintained or repaired conveniently.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a sensor is put in built-in office, includes installation apron (1), its characterized in that: a plurality of first mounting holes (2) are distributed at the edge of the mounting cover plate (1), a connecting groove (3) is arranged in the middle of the upper end of the mounting cover plate (1), a first annular groove (4) is arranged on the bottom wall of the connecting groove (3), a plurality of second mounting holes (5) are distributed on the outer side of the first annular groove (4), a sensor protection cover (6) is inserted in the connecting groove (3), a connecting bottom plate (8) is arranged on the lower surface of the sensor protection cover (6), an annular bulge (7) is arranged at the position of the connecting bottom plate (8) corresponding to the first annular groove (4), a plurality of third mounting holes (9) are distributed at the position of the connecting bottom plate (8) corresponding to the second mounting holes (5), the second mounting holes (5) and the third mounting holes (9) are fixedly mounted through screws, a central hole (10) is arranged in the middle of the mounting cover plate (1), an adapter (18) is, the inside wall top of sensor safety cover (6) is equipped with the jump ring groove, be equipped with jump ring (11) in the jump ring groove, the downside threaded connection of jump ring (11) has ceramic substrate (12), be equipped with piezoceramics (13) and signal processor (14) in sensor safety cover (6), the lower surface of ceramic substrate (12) is located in piezoceramics (13), piezoceramics (13) and signal processor (14) electric connection, the one end that is connected with output line (15) on signal processor (14), the other end of output line (15) extends to the outside through centre bore (10) and adapter (18).
2. The built-in partial discharge sensor according to claim 1, wherein: and epoxy resin and sound absorption materials are filled in the sensor protection cover (6).
3. The built-in partial discharge sensor according to claim 1, wherein: the sensor protection cover (6) is a stainless steel sensor protection cover and is arranged in a cylindrical shape.
4. The built-in partial discharge sensor according to claim 1, wherein: the side wall of one side, close to the annular bulge (7), of the first annular groove (4) is in a toothed shape.
5. The built-in partial discharge sensor according to claim 1, wherein: the lower surface of the mounting cover plate (1) is provided with a second annular groove (16) at the inner side of the first mounting hole (2).
6. The built-in partial discharge sensor according to claim 1, wherein: and a polytetrafluoroethylene insulating layer (17) is arranged on the outer side wall of the sensor protective cover (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021633638.6U CN212965252U (en) | 2020-08-08 | 2020-08-08 | Built-in partial discharge sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021633638.6U CN212965252U (en) | 2020-08-08 | 2020-08-08 | Built-in partial discharge sensor |
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| Publication Number | Publication Date |
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| CN212965252U true CN212965252U (en) | 2021-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021633638.6U Active CN212965252U (en) | 2020-08-08 | 2020-08-08 | Built-in partial discharge sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113376484A (en) * | 2021-06-10 | 2021-09-10 | 上海富乐华半导体科技有限公司 | Partial discharge test method for double-sided copper-clad ceramic substrate |
-
2020
- 2020-08-08 CN CN202021633638.6U patent/CN212965252U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113376484A (en) * | 2021-06-10 | 2021-09-10 | 上海富乐华半导体科技有限公司 | Partial discharge test method for double-sided copper-clad ceramic substrate |
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