CN210894588U - Device for GIS partial discharge detection - Google Patents
Device for GIS partial discharge detection Download PDFInfo
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- CN210894588U CN210894588U CN201921569242.7U CN201921569242U CN210894588U CN 210894588 U CN210894588 U CN 210894588U CN 201921569242 U CN201921569242 U CN 201921569242U CN 210894588 U CN210894588 U CN 210894588U
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Abstract
The utility model relates to a detection technique is put in the GIS office, especially relates to a device that is used for GIS office to put detection, including casing, connecting piece and connector, be equipped with the superfrequency sensor in the casing, the superfrequency sensor is in one side of casing is equipped with to connect and is connected with signal transmission line, the bottom side of casing is the curved surface, the bottom border of casing bonds and has shielding sponge, the top of casing is equipped with the connecting cylinder, the one end of connecting piece with connecting cylinder swing joint, the other end of connecting piece with the one end of connector is rotated and is connected, the other end of connector is connected with the insulator spindle. Utilize the device to carry out the office to GIS at regular intervals and put when detecting, can make placing flexibility improvement of sensor, when meetting suspicious signal in the testing process simultaneously, can make sensor and GIS's basin formula insulator closely laminate be in the same place, have fine shielding measure, effectively reduce the interference that the external world brought.
Description
Technical Field
The utility model relates to a GIS partial discharge detection technique especially relates to a device that is used for GIS partial discharge detection.
Background
GIS is widely adopted because of its high reliability and compactness. However, in the manufacturing, transportation and on-site assembly processes of the GIS device, some defects which are difficult to avoid, such as suspended particles, metal tips or bubbles generated inside the device, may be caused, and then a partial discharge phenomenon may be generated in the operation process of the power device. Partial discharge is a premonitory sign of insulation breakdown of electrical equipment, partial discharge detection is an important method for diagnosing the insulation state of the electrical equipment, and the occurrence of insulation accidents of the electrical equipment can be avoided by timely and effectively detecting the partial discharge. Ultrahigh frequency signals with the frequency band of about 500 MHz-3 GHz can be generated in the process of partial discharge, and when the signals are transmitted in the GIS, a part of the signals can be leaked to the outside through nonmetal equipment such as a basin-type insulator. Therefore, ultrahigh frequency sensors can be installed at the positions, and partial discharge can be detected through receiving and analyzing signals.
According to the current situation of the power system, the portable external ultrahigh frequency sensor is mainly applied to two situations: one is to regularly carry out partial discharge detection on the GIS, under the condition, a contact surface of a sensor is usually in close contact with a basin-type insulator, a computer processing system is used for observing whether suspicious partial discharge signals exist or not, if the suspicious partial discharge signals do not exist, the suspicious partial discharge signals are quickly converted into the next air chamber, the required time of the process is short, and usually one air chamber does not exceed 10 s; the other is that when a suspicious signal is encountered in the detection process, the sensor needs to be stably fixed on the basin-type insulator, long-time observation and analysis is carried out to determine whether the partial discharge signal is really present, and the partial discharge type identification or positioning is carried out, the process may take tens of minutes, and the external interference on the stage is expected to be as small as possible.
However, when GIS is detected in a local discharge mode at regular intervals, basin-type insulators of GIS equipment in the site are transversely arranged and longitudinally arranged, different voltage class heights are different, and air chambers on two sides of the basin-type insulators need to be connected through grounding copper bars, so that the flexibility of sensor placement is reduced to a certain extent. And when meetting suspicious signal in the testing process, rely on the staff to hand or fix the sensor through the mode that utilizes strap winding basin formula insulator a week, the process is comparatively loaded down with trivial details. In addition, in the process of performing the partial discharge analysis, the higher the signal-to-noise ratio is, the more accurate the detection result is, so that the sensor is expected to have a good shielding measure, and the interference brought by the outside is effectively reduced. The main reason that the detection has great interference is put in present superfrequency office is exactly that the basin formula insulator of sensor and GIS can not closely paste together, though its self metal casing of sensor can play fine shielding effect, but the contact position between sensor receiving face and the disk insulator lacks effectual shielding.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device that is used for GIS local discharge to detect utilizes the device to carry out the local discharge to GIS at regular intervals and examines time measuring, can make placing of sensor flexibility improve, when meetting suspicious signal simultaneously in the testing process, can make sensor and GIS's basin formula insulator closely laminate together, has fine shielding measure, effectively reduces the external interference of bringing.
The technical scheme of the utility model is that:
the utility model provides a device for GIS partial discharge detection, includes casing, connecting piece and connector, be equipped with the superfrequency sensor in the casing, the superfrequency sensor is in one side of casing is equipped with to connect and is connected with signal transmission line, the bottom side of casing is the curved surface, the bottom border of casing bonds and has the shielding sponge, the top of casing is equipped with the connecting cylinder, the one end of connecting piece with connecting cylinder swing joint, the other end of connecting piece with the one end of connector is rotated and is connected, the other end of connector is connected with the insulator spindle.
When the GIS is subjected to partial discharge detection at regular intervals, an operator can lift the GIS by holding the insulating rod, the GIS equipment with different heights is adapted to be detected, meanwhile, when the GIS equipment is detected, the function of adjusting the pitch angle when the ultrahigh frequency sensor is detected is realized by adjusting the rotating angle between the connecting piece and the connecting head, and the transverse or longitudinal arrangement of the ultrahigh frequency sensor detection can be realized by movably connecting the connecting piece and the connecting cylinder, so that the flexibility of placing the ultrahigh frequency sensor is realized;
when meetting suspicious signal in the testing process, the insulating rod is handed to the operator makes the curved surface of casing bottom compress tightly through the shielding sponge of arranging the border in and the laminating of disc insulator side of GIS equipment, and is fixed convenient, makes the detection face of superfrequency sensor and GIS's basin formula insulator close fitting be in the same place to contact position between the two makes superfrequency sensor receiving face and disc insulator has effectual shielding through the shielding sponge, effectively reduces the interference that the external world brought.
Furthermore, the top of the shell is positioned on two sides of the connecting cylinder and provided with clamping grooves for fixing rubber belts.
The basin type insulator both sides all have nut and the bolt that is used for connecting basin type insulator and both sides air chamber, and protrusion in the surface moreover, consequently when meetting suspicious signal in the testing process, can pass the draw-in groove with the rubber tape and make its both ends detain on nut or nut, make this casing pass through the tight pressure of shielding sponge of bottom surface on the disc insulator border of GIS equipment, further strengthen the fixed action, can need not to make the casing keep compressing tightly with the handheld action bars of strength, save physical power. And because of having the blockking of draw-in groove, make the casing of built-in superfrequency sensor can not be because of the action of gravity landing, adopt this kind of mode fixed, convenient and fast, it is fine moreover to respond to.
Furthermore, the connecting piece comprises a cylindrical head and a first metal lug with a threaded hole, the first metal lug is fixed on the cylindrical head, and keys with springs are arranged on two sides of the cylindrical head.
Further, the connecting cylinder is a hollow cylindrical sleeve, perforations are formed in the top of the shell in the transverse direction and the longitudinal direction, the cylindrical head is arranged in the connecting cylinder, and the keys are clamped in the perforations for fixing.
The transverse or longitudinal arrangement of the ultrahigh frequency sensor detection can be flexibly realized by pressing the keys on the two sides of the cylindrical head and clamping the keys into the transverse or longitudinal through holes of the connecting cylinder.
Furthermore, the connector comprises a hollow threaded pipe and a second metal lug fixed to the top of the hollow threaded pipe and provided with a threaded hole, and the second metal lug is in through connection with the first metal lug through a butterfly bolt.
The connection of the connector and the connecting piece is realized by that a butterfly bolt penetrates through a first metal lug and a second metal lug with two threaded holes to realize hinging, when the pitch angle needs to be adjusted, the butterfly bolt is firstly unscrewed to enable the connector and the connecting piece to rotate and adjust, and after the adjustment is finished, the butterfly bolt is screwed down to fix the pitch angle, so that the function of adjusting the pitch angle when the ultrahigh frequency sensor detects the pitch angle is realized.
Furthermore, the top of the insulating rod is provided with threads, and the insulating rod is in threaded connection with the hollow threaded pipe.
Carry out threaded connection through the hollow screwed pipe of connector and the top of insulator spindle, lift this detection device through the insulator spindle in order to adapt to the not GIS equipment of co-altitude of different voltage classes, simultaneously after finishing using, can dismantle the insulator spindle get off portable and accomodate.
Further, the joint is an N-type joint.
The ultrahigh frequency sensor is connected with the signal transmission line through the N-type connector, so that the damage caused by the gravity action of the signal transmission line in the long-term use process is reduced, and the service life of the sensor is prolonged.
Further, the insulating rod adopts flexible insulating rod.
The height of lifting is adjusted to the scalable adjustment of flexible insulator spindle, and the operating personnel of being convenient for operates.
Furthermore, the bottom of insulator spindle is equipped with anti-skidding handle to the anti-skidding of hand is deviate from, strengthens the security of operation.
The utility model has the advantages that:
1. the device can detect air chambers with different voltage levels and different height positions by connecting the connector with the insulating rod;
2. the connecting cylinder on the top surface of the shell is in pressing and clamping connection with the cylindrical head of the connecting piece, so that the conversion of the detection direction of the ultrahigh frequency sensor is realized, the movable reversing is performed by pressing the key, the operation is simple and easy, the conversion is fast performed during the regular detection, the transverse or longitudinal arrangement of the ultrahigh frequency sensor is realized, and the device is suitable for disc insulators of GIS equipment which is transversely arranged or longitudinally arranged;
3. the butterfly bolt penetrates through the metal lug of the connecting piece and the metal lug of the connector, so that the pitch angle detected by the ultrahigh frequency sensor can be adjusted when the ultrahigh frequency sensor is detected, and the detection flexibility is provided;
4. through the curved surface design of casing bottom and have the shielding sponge, make the detection face of superfrequency sensor and GIS's basin formula insulator closely laminate together to have effectual shielding effect, reduce the interference that the external world brought.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of the housing;
FIG. 3 is a schematic structural view of the housing after being bonded with a shielding sponge;
FIG. 4 is a schematic view of the structure of the connector;
FIG. 5 is a schematic structural diagram of the connecting head;
in the figure: the device comprises a shell 1, a 101-N-shaped connector, a 102-connecting cylinder, a 103-through hole, a 2-connecting piece, a 201-cylindrical head, a 202-first metal lug, a 203-button, a 3-connecting head, a 301-hollow threaded pipe, a 302-second metal lug, a 4-shielding sponge, a 5-butterfly bolt, a 6-insulating rod and a 7-clamping groove.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
Example 1:
as shown in fig. 1-5, a device for GIS partial discharge detection comprises a housing 1, a connector 2 and a connector 3, wherein an ultrahigh frequency sensor is fixed in the housing 1 by screws, the ultrahigh frequency sensor is provided with an N-type connector 101 at one side of the housing 1 to be connected with a signal transmission line, a receiving surface of the ultrahigh frequency sensor is right opposite to the bottom surface of the housing 1, the side surface of the bottom of the housing 1 is a curved surface, a shielding sponge 4 is bonded at the bottom edge of the housing 1, the top of the housing 1 is welded with a connector barrel 102, the connector barrel 102 is a hollow cylindrical sleeve, through holes 103 are formed along the transverse direction and the longitudinal direction of the top of the housing 1, the connector 2 comprises a cylindrical head 201 and a first metal lug 202 with a threaded hole, the first metal lug 202 is fixedly welded on the cylindrical head 201, keys 203 with springs are arranged at two sides of the cylindrical head 201, the cylindrical head 201 is arranged in the connector barrel 102, and, the shell 1 can be transversely or vertically installed, the connector 3 comprises a hollow threaded pipe 301 and a second metal lug 302 fixedly welded at the top of the hollow threaded pipe and provided with a threaded hole, the second metal lug 3021 of the connector 3 is in through connection with the first metal 202 lug of the connecting piece 2 through a butterfly bolt 5, relative rotation between the connector 3 and the connecting piece 2 can be realized by loosening or tightening the butterfly bolt 5, and the connector 3 is in threaded connection with an insulating rod 6 through the hollow threaded pipe 301.
When the GIS is periodically subjected to partial discharge detection, an operator can hold the insulating rod 6 to lift the GIS, the GIS is suitable for detection of GIS equipment with different voltage levels and different heights, meanwhile, when the pitch angle needs to be adjusted in detection, the butterfly bolt 5 is firstly unscrewed, the connector 3 and the connecting piece 2 are rotated and adjusted, and the butterfly bolt 5 is screwed down after the adjustment is finished so as to fix the pitch angle, so that the function of adjusting the pitch angle when the ultrahigh frequency sensor is detected is realized, and the transverse or longitudinal arrangement of the ultrahigh frequency sensor can be flexibly realized by pressing the keys 203 on two sides of the cylindrical head 201 and clamping the keys into the transverse or longitudinal through holes 103 of the connecting cylinder 102;
when meetting suspicious signal in the testing process, the operator holds insulator spindle 6 and makes the curved surface of 1 bottom of casing compress tightly through the shielding sponge 4 of arranging the border in and the laminating of disc insulator side of GIS equipment, and is fixed convenient, makes the detection face of superfrequency sensor and GIS's basin formula insulator closely laminate together to contact position between the two makes superfrequency sensor receiving face and disc insulator has effectual shielding through shielding sponge 4, effectively reduces the interference that the external world brought.
In this embodiment, the external interference is reduced from two angles:
1. the curved surface shell is adopted, so that the attaching degree is increased; 2. installing a shielding sponge;
the side of the basin-type insulator is a curved surface, and the metal shell at the joint part of the shell 1 is designed into an arc-shaped structure, so that the shape of the basin-type insulator is matched with that of the disk insulator. However, due to the difference of voltage grades and manufacturers, the basin-type insulator has various sizes and radians, and it is difficult to adapt an ultrahigh frequency sensor with a fixed shape to insulators of all sizes. Therefore, when the metal casing of laminating position is designed into the arc structure, with the peripheral metal casing of casing 1 bottom outwards extend 0.8cm, install the elasticity sponge that the outward appearance is stained with the shielding sticky tape additional at this position, utilize the deformation characteristic of sponge, can make this shell of built-in superfrequency sensor be suitable for the insulator of multiple size, realize the effective shielding to external disturbance, and this kind of design can avoid occupying the positive receiving area of superfrequency sensor, do not influence the receipt to superfrequency partial discharge signal.
In the present embodiment, the UHF sensor is model number PDS-US02C or PDS-G1500.
In this embodiment, the uhf sensor is connected to the signal transmission line through the N-type connector 101, which reduces the damage caused by the gravity of the signal transmission line during long-term use and prolongs the service life of the sensor.
In this embodiment, insulator spindle 6 adopts flexible insulator spindle, and its bottom is equipped with anti-skidding handle, and the height of lifting is lifted in the scalable adjustment of flexible insulator spindle, and the operating personnel of being convenient for operates, can prevent that the hand is slided out simultaneously, strengthens the security of operation.
Example 2:
this embodiment is similar to embodiment 1 except that a snap groove 7 for fixing a rubber band is welded to both sides of the connecting tube 102 at the top of the housing 1. When the shell 1 with the built-in ultrahigh frequency sensor is designed, the structural characteristics of GIS equipment are fully considered, nuts and bolts for connecting the basin-type insulators and air chambers on two sides are arranged on two sides of each basin-type insulator and protrude out of the outer surface, so that when a suspicious signal is met in the detection process, the shell 1 with the built-in ultrahigh frequency sensor needs to be stably attached to a disc insulator of the GIS equipment, after a rubber belt penetrates through the clamping groove 7, two ends of the rubber belt are buckled on the nuts or the nuts, the shell 1 can be tightly pressed on the edge of the disc insulator of the GIS equipment through the shielding sponge 4 on the bottom surface, the fixing effect is further enhanced, the shell 1 can be tightly pressed without using a manual operating rod 6, and the physical strength is saved. And because of having the blockking of draw-in groove 7, make the casing 1 of built-in superfrequency sensor can not because of the action of gravity landing, adopt this kind of mode fixed, convenient and fast, it is effectual moreover.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. The utility model provides a device for GIS partial discharge detection, a serial communication port, including casing, connecting piece and connector, be equipped with the superfrequency sensor in the casing, the superfrequency sensor is in one side of casing is equipped with and connects and signal transmission line connection, the bottom side of casing is the curved surface, the bottom border of casing bonds and has the shielding sponge, the top of casing is equipped with the connecting cylinder, the one end of connecting piece with connecting cylinder swing joint, the other end of connecting piece with the one end of connector is rotated and is connected, the other end of connector is connected with the insulator spindle.
2. The device for detecting GIS partial discharge according to claim 1, wherein the top of the shell is provided with a slot for fixing a rubber belt at two sides of the connecting cylinder.
3. The device for detecting GIS partial discharge according to claim 1, wherein the connecting member includes a cylindrical head and a first metal lug with a threaded hole, the first metal lug is fixed on the cylindrical head, and keys with springs are arranged on two sides of the cylindrical head.
4. The device of claim 3, wherein the connecting cylinder is a hollow cylindrical sleeve, through holes are formed in the top of the housing in both the transverse direction and the longitudinal direction, the cylindrical head is disposed in the connecting cylinder, and the key is fastened in the through holes for fixing.
5. The device for detecting GIS partial discharge according to claim 3, wherein the connector comprises a hollow threaded pipe and a second metal lug with a threaded hole fixed on the top of the hollow threaded pipe, and the second metal lug is connected with the first metal lug in a penetrating manner through a butterfly bolt.
6. The device for GIS partial discharge detection according to claim 5, wherein the top of the insulating rod is provided with a thread, and the insulating rod is in threaded connection with the hollow threaded pipe.
7. The device for GIS partial discharge detection according to claim 1, wherein the connector is an N-type connector.
8. The device for detecting GIS partial discharge according to claim 1, wherein the insulating rod is a telescopic insulating rod.
9. The device for detecting GIS partial discharge according to claim 1, wherein the bottom of the insulation rod is provided with an anti-slip handle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921569242.7U CN210894588U (en) | 2019-09-19 | 2019-09-19 | Device for GIS partial discharge detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921569242.7U CN210894588U (en) | 2019-09-19 | 2019-09-19 | Device for GIS partial discharge detection |
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| CN210894588U true CN210894588U (en) | 2020-06-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009288A (en) * | 2021-01-29 | 2021-06-22 | 国网浙江桐庐县供电有限公司 | Handheld partial discharge detection device and detection method |
| CN113030655A (en) * | 2021-01-29 | 2021-06-25 | 国网浙江桐庐县供电有限公司 | Hand-held type partial discharge detection device |
| CN113933606A (en) * | 2021-10-13 | 2022-01-14 | 西安苏试广博环境可靠性实验室有限公司 | Multifunctional testing device for testing electric field radiation sensitivity |
| CN114019301A (en) * | 2021-10-18 | 2022-02-08 | 国网山东省电力公司淄博供电公司 | Special auxiliary detection tool for distribution ultrahigh frequency detection |
| CN114258223A (en) * | 2021-12-24 | 2022-03-29 | 广东电网有限责任公司 | Sensor |
-
2019
- 2019-09-19 CN CN201921569242.7U patent/CN210894588U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009288A (en) * | 2021-01-29 | 2021-06-22 | 国网浙江桐庐县供电有限公司 | Handheld partial discharge detection device and detection method |
| CN113030655A (en) * | 2021-01-29 | 2021-06-25 | 国网浙江桐庐县供电有限公司 | Hand-held type partial discharge detection device |
| CN113933606A (en) * | 2021-10-13 | 2022-01-14 | 西安苏试广博环境可靠性实验室有限公司 | Multifunctional testing device for testing electric field radiation sensitivity |
| CN114019301A (en) * | 2021-10-18 | 2022-02-08 | 国网山东省电力公司淄博供电公司 | Special auxiliary detection tool for distribution ultrahigh frequency detection |
| CN114258223A (en) * | 2021-12-24 | 2022-03-29 | 广东电网有限责任公司 | Sensor |
| CN114258223B (en) * | 2021-12-24 | 2024-04-30 | 广东电网有限责任公司 | Sensor |
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