CN210626636U - High-tension bushing tap grounding on-line monitoring device - Google Patents
High-tension bushing tap grounding on-line monitoring device Download PDFInfo
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- CN210626636U CN210626636U CN201921235570.3U CN201921235570U CN210626636U CN 210626636 U CN210626636 U CN 210626636U CN 201921235570 U CN201921235570 U CN 201921235570U CN 210626636 U CN210626636 U CN 210626636U
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Abstract
A high-voltage bushing tap grounding on-line monitoring device belongs to the field of detection devices and comprises a base and a tap grounding cover; the method is characterized in that: the device also comprises a grounding electrode, a compression spring, a grounding detection electrode, a detection spring and an online monitoring loop; a groove is formed in one side of the top wall of the end screen grounding cover; the grounding electrode is arranged in the groove; the upper end of the grounding detection electrode is arranged in the detection through hole, and the lower end of the grounding detection electrode is arranged in the grounding through hole; the on-line monitoring loop comprises a monitoring light emitting diode, a monitoring power supply, a first monitoring switch and a second monitoring switch. The contact area between the grounding electrode and the lead post is increased through the grounding electrode; downward operation power is provided for the grounding electrode through the compression spring, and two ends of the grounding electrode are in contact with the inner wall of the groove, so that the lead post is grounded more reliably; the grounding state of the sleeve tap can be visually seen by monitoring the light-emitting diode; when the suspension potential exists, the bushing end screen can be temporarily grounded through the online monitoring loop, and the safe and stable operation of the equipment is ensured to the maximum extent.
Description
Technical Field
The utility model belongs to the detection device field especially relates to a high-tension bushing end screen ground connection on-line monitoring device.
Background
The oiled paper capacitor type high voltage bushing is one of important electrical devices of a power system, and not only plays a role of insulating a lead wire from the ground, but also plays a role of fixing and supporting the lead wire. During normal operation of the bushing, the bushing end screen needs to be reliably grounded. At present, most of the sleeve end screen grounding modes are built-in, namely, the grounding cover is connected with a sleeve end screen lead post through a spring piece. Although the mode is the most reliable one of the current grounding modes, after the grounding cover is covered, whether the end screen is well grounded cannot be known; in addition, in the operation process of the oiled paper capacitor type high-voltage bushing, when poor grounding is caused at the end screen of the bushing due to factors such as spring failure and the like, a suspension potential is generated at the end screen position to generate low-energy partial discharge, if a fault condition cannot be found effectively and processed in time, the capacitor screen can be ablated after long-time operation, a core inside the high-voltage bushing is in short circuit with the ground, the possibility of bushing explosion is caused, and potential hazards are brought to safe and stable operation of a power grid.
Disclosure of Invention
The utility model aims at solving the above problem, a high-tension bushing end screen ground connection on-line monitoring device is provided.
The utility model discloses a high-voltage bushing end screen grounding on-line monitoring device, which comprises a base and an end screen grounding cover; the device also comprises a grounding electrode, a compression spring, a grounding detection electrode, a detection spring and an online monitoring loop; a groove is formed in one side, close to the top wall of the end screen grounding cover, of the side wall of the end screen grounding cover; the grounding electrode is arranged in the groove; the grounding electrode is connected with the top wall of the end screen grounding cover through the compression spring; a grounding through hole is formed in the center of the grounding electrode; a detection through hole is formed in the center of the top wall of the end screen grounding cover; the upper end of the grounding detection electrode is arranged in the detection through hole, and the lower end of the grounding detection electrode is arranged in the grounding through hole; the aperture of the grounding through hole is larger than the diameter of the cross section of the lower end of the grounding detection electrode; an insulation limiting block is arranged between the grounding detection electrode and the detection through hole; one end of the on-line monitoring loop is electrically connected with the upper end of the detection spring, and the other end of the on-line monitoring loop is grounded; the on-line monitoring loop comprises a monitoring light emitting diode, a monitoring power supply, a first monitoring switch and a second monitoring switch; one end of the first monitoring switch is grounded, and the other end of the first monitoring switch is electrically connected with the monitoring power supply, the monitoring light-emitting diode and the detection spring in sequence; one end of the second monitoring switch is grounded, and the other end of the second monitoring switch is electrically connected with the upper end of the detection spring. The monitoring power supply provides power for the light emitting diode of the on-line monitoring loop; the aperture of the grounding through hole is larger than the diameter of the cross section of the lower end of the grounding detection electrode, so that the grounding detection electrode is in contact with the lead post, the lead post is in contact with the grounding electrode, and the grounding electrode is in contact with the end screen grounding cover to realize grounding.
The utility model discloses a high-tension bushing end screen ground connection on-line monitoring device, the on-line monitoring return circuit still includes voltage monitoring device; the voltage monitoring device is connected in parallel to two ends of the monitoring power supply. Through voltage monitoring device inspection personnel can comparatively audio-visually observe out return circuit power supply electric quantity surplus condition, when the electric quantity is not enough, in time change.
The utility model discloses a high tension bushing end screen ground connection on-line monitoring device, the longitudinal section of ground connection detection utmost point is the T type; the upper end of the grounding detection electrode is arranged in the detection through hole and is positioned above the insulation limiting block; on one hand, the end screen grounding cover and the grounding detection electrode are isolated and cannot be contacted with each other; on the other hand, can play spacing effect, when overhauing the sleeve pipe end screen, open end screen ground connection lid, under the effect of gravity, the detection spring can not overstretch and lead to elastic change, extension life cycle. The grounding electrode is plate-shaped; the grounding electrode is horizontally arranged in the groove. The earthing pole level sets up in the recess, and the both ends of earthing pole contact with the recess inner wall that sets up on end screen ground connection lid lateral wall under compression spring's effect to better make earthing pole and end screen ground connection lid contact, and then be the better realization ground effect of pin post.
High-tension bushing end screen ground connection on-line monitoring device, compression spring is provided with a plurality of side by side. The pressing springs are arranged in parallel at equal intervals, so that the plate-shaped grounding electrode can be more stably contacted with the lead post, and the grounding electrode can be better and reliably contacted with the lead post under the action of the pressure of the springs; meanwhile, the grounding reliability is further improved by the four springs, and one to two springs lose elasticity or deform, so that the overall grounding state of the lead post is not influenced.
The utility model discloses a high-voltage bushing end screen grounding on-line monitoring device, the top end of the end screen grounding cover is provided with a sealing rainproof cover; the detection through hole is positioned in the sealed rainproof cover. The main effect of sealed rain-proof cover is the protection on-line monitoring return circuit. Whether in normal operating or when overhauing the preliminary examination to equipment, sealed rain-proof cover all is in encapsulated situation, prevents that natural factor or human factor from causing the destruction. When the sleeve is overhauled, the sealing rainproof cover is opened, the online monitoring loop is pulled out, and the monitoring loop is thoroughly separated from the sleeve end screen. After the maintenance is finished, the monitoring loop is connected, and then the sealing rain cover is restored to a sealing state.
High-tension bushing end screen ground connection on-line monitoring device, between sealed rain-proof cover and the end screen ground connection lid with all through fastening bolt fixed connection between base and the end screen ground connection lid.
In the high-voltage bushing end screen grounding on-line monitoring device, the fastening bolt is sleeved with the sealing gasket; the stability and the leakproofness of fixing are improved by arranging the seal.
The utility model discloses a high tension bushing end screen ground connection on-line monitoring device, through the improvement to current end screen ground connection lid structure, increase earthing pole, pressure spring, ground connection detection pole, detection spring and on-line monitoring return circuit; by adopting the plate-shaped grounding electrode, the contact area between the grounding electrode and the lead post is increased; meanwhile, the compression spring provides downward running power for the grounding electrode, the grounding electrode is arranged in the groove in the end screen grounding cover, and two ends of the grounding electrode are in contact with the inner wall of the groove, so that the lead post can be grounded more reliably; when the sleeve normally runs, an inspector can visually see the grounding state of the end screen of the sleeve by monitoring the light-emitting diode; when the suspension potential exists, the bushing end screen can be quickly and temporarily grounded through the online monitoring loop, and the safe and stable operation of the equipment is ensured to the maximum extent.
Drawings
Fig. 1 is a schematic structural view of a high-voltage bushing end screen grounding on-line monitoring device according to an embodiment of the present invention;
the device comprises a base 1, a sealing pad 2, a fastening bolt 3, a tail screen grounding cover 4, a lead post 5, a grounding electrode 6, a compression spring 7, a grounding detection electrode 8, an insulating limiting block 9, a sealing rainproof cover 10, a plastic shell 12, a monitoring power supply 13, a voltage monitoring device 14, a monitoring light emitting diode 15, a first monitoring switch 16 and a second monitoring switch 17.
Detailed Description
The high-voltage bushing tap grounding on-line monitoring device of the present invention is described in detail with reference to the accompanying drawings and embodiments.
The utility model discloses a high-voltage bushing end screen grounding on-line monitoring device, as shown in figure 1, comprises a base 1 and an end screen grounding cover 4; the device also comprises a grounding electrode 6, a compression spring 7, a grounding detection electrode 8, a detection spring and an online monitoring loop; a groove is formed in one side, close to the top wall of the end screen grounding cover 4, of the side wall of the end screen grounding cover 4; the grounding electrode 6 is arranged in the groove; the grounding electrode 6 is connected with the top wall of the end screen grounding cover 4 through the pressing spring 7; a grounding through hole is formed in the center of the grounding electrode 6; a detection through hole is formed in the center of the top wall of the end screen grounding cover 4; the upper end of the grounding detection electrode 8 is arranged in the detection through hole, and the lower end of the grounding detection electrode 8 is arranged in the grounding through hole; the aperture of the grounding through hole is larger than the diameter of the cross section of the lower end of the grounding detection electrode 8; an insulation limiting block 9 is arranged between the grounding detection electrode 8 and the detection through hole; one end of the on-line monitoring loop is electrically connected with the upper end of the detection spring, and the other end of the on-line monitoring loop is grounded; the on-line monitoring loop comprises a monitoring light emitting diode 15, a monitoring power supply 13, a first monitoring switch 16 and a second monitoring switch 17; one end of the first monitoring switch 16 is grounded, and the other end is electrically connected with the monitoring power supply 13, the monitoring light-emitting diode 15 and the detection spring in sequence; one end of the second monitoring switch 17 is grounded, and the other end is electrically connected with the upper end of the detection spring. The online monitoring loop further comprises a voltage monitoring device 14; the voltage monitoring device 14 is connected in parallel to two ends of the monitoring power supply 13. The monitoring power supply 13 provides power for the light emitting diode of the on-line monitoring loop; the aperture of the grounding through hole is larger than the diameter of the cross section of the lower end of the grounding detection electrode 8, so that the grounding detection electrode 8 is in contact with the lead post 5, the lead post 5 is in contact with the grounding electrode 6, and the grounding electrode 6 is in contact with the end screen grounding cover 4 to realize grounding.
The longitudinal section of the grounding detection electrode 8 is T-shaped; the upper end of the grounding detection electrode 8 is arranged in the detection through hole and is positioned above the insulation limiting block 9. On one hand, the end screen grounding cover 4 and the grounding detection electrode 8 are isolated from each other so as not to be contacted with each other; on the other hand, the device can play a limiting role, when the sleeve end screen is overhauled, the end screen grounding cover 4 is opened, and the detection spring cannot be excessively stretched to cause elastic change under the action of gravity, so that the service cycle is prolonged; four compression springs 7 are arranged in parallel at equal intervals; a sealing rainproof cover 10 is arranged at the top end of the end screen grounding cover 4; the detection through hole is positioned in the sealed rainproof cover 10. Sealed rain-proof cover 10 mainly used protects the monitoring return circuit. Whether in normal operation or when overhauing the preliminary examination to equipment, sealed rain-proof cover 10 all is in encapsulated situation, prevents that natural factor or human factor from causing the destruction. When the sleeve is overhauled, the sealing rainproof cover is opened, the online monitoring loop is pulled out, and the monitoring loop is thoroughly separated from the sleeve end screen. After the maintenance is completed, the monitoring loop is connected, and then the sealing rain cover 10 is restored to a sealing state. The sealing rain cover 10 and the end screen grounding cover 4 and the base 1 and the end screen grounding cover 4 are fixedly connected through fastening bolts 3; the fastening bolt 3 is sleeved with a sealing gasket 2; the stability and the tightness of fixation are improved by arranging the seal; the detection spring is enclosed in a plastic housing 12.
Under the action of the four springs, the middle part of the grounding electrode 6 is reliably contacted with the end screen lead post 5, the grounding electrode 6 is reliably connected with the end screen grounding cover 4 through the four springs through the two ends of the grounding electrode, and after the end screen grounding cover 4 is reliably connected with the base 1 through the fastening bolt 3, the body of the end screen grounding cover 4 is in a grounding state, so that the end screen lead post 5 is also in a grounding state. A cylindrical grounding through hole is reserved at the contact position of the middle of the grounding electrode 6 and the lead post 5, the tail end of the grounding detection electrode 8 penetrates through the cylindrical grounding through hole in the middle of the grounding electrode 6 and is not in contact with the cylindrical grounding through hole, so that the tail end of the grounding detection electrode 8 is directly connected with the lead post 5, and the grounding detection electrode 8 is separated from the end screen grounding cover 4 through an insulation limiting block 9, so that no electrical connection exists. The grounding detection pole 8 is provided with a detection spring and is packaged in a plastic shell 12 together. The lead post 5 contacts with the middle position of the grounding electrode 6, the grounding electrode 6 is connected with the end screen grounding cover 4 body, and after the maintenance is finished, the end screen grounding cover 4 is in a grounding state, so that the lead post 5 is in the grounding state. The grounding detection electrode 8 is not in contact with the end screen grounding cover 4 and the grounding electrode 6, and is directly in contact with the lead post 5.
One end of the online monitoring loop is electrically connected with the plastic shell 12 through a plug socket, and the other end of the online monitoring loop is grounded; the plug socket is arranged on the plastic shell 12; the on-line monitoring loop comprises a monitoring light emitting diode 15, a voltage monitoring device 14, a monitoring power supply 13, a first monitoring switch 16 and a second monitoring switch 17; one end of the first monitoring switch 16 is grounded, and the other end is electrically connected with the monitoring power supply 13, the monitoring light-emitting diode 15 and the plug socket in sequence; the voltage monitoring device 14 is connected in parallel to two ends of the monitoring power supply 13; one end of the second monitoring switch 17 is grounded, and the other end is electrically connected with the plug socket. The monitoring power supply 13 provides power for the light emitting diode of the online monitoring loop, the power supply can adopt a replaceable design, and when the electric quantity of the power supply is insufficient, the power supply can be conveniently detached and replaced at any time without influencing the normal operation of the sleeve; through 14 inspection personnel of voltage monitoring device can be comparatively audio-visual observation return circuit power supply electric quantity surplus condition, when the electric quantity is not enough, in time change.
The design of plug-in plug socket is adopted in the connection between on-line monitoring return circuit and plastic housing 12, when equipment has a power failure and overhauls, opens sealed rain-proof cover 10, pulls out the wiring between the socket on-line monitoring return circuit and plastic housing 12, not only conveniently overhauls but also can not cause the damage to on-line monitoring return circuit. When the bushing is in normal operation, if the end screen is reliably grounded, the first monitoring switch 16 is closed, the second monitoring switch 17 is disconnected, the loop is in a conducting state, the monitoring light emitting diode 15 is on, and inspection personnel can visually see the grounding state of the end screen of the bushing; if the lamp is not on after the first monitoring switch 16 is closed, it indicates that the end screen is not reliably grounded and a floating potential exists, and at this time, the second monitoring switch 17 can be quickly closed, so that the end screen of the bushing is temporarily grounded through the on-line monitoring circuit, and the safe and stable operation of the equipment is ensured to the maximum extent.
Claims (7)
1. A high-voltage bushing tap grounding on-line monitoring device comprises a base (1) and a tap grounding cover (4); the method is characterized in that: the device also comprises a grounding electrode (6), a compression spring (7), a grounding detection electrode (8), a detection spring and an online monitoring loop; a groove is formed in one side, close to the top wall of the end screen grounding cover (4), of the side wall of the end screen grounding cover (4); the grounding electrode (6) is arranged in the groove; the grounding electrode (6) is connected with the top wall of the end screen grounding cover (4) through the pressing spring (7); a grounding through hole is formed in the center of the grounding electrode (6); a detection through hole is formed in the center of the top wall of the end screen grounding cover (4); the upper end of the grounding detection electrode (8) is arranged in the detection through hole, and the lower end of the grounding detection electrode (8) is arranged in the grounding through hole; the aperture of the grounding through hole is larger than the diameter of the cross section of the lower end of the grounding detection electrode (8); an insulation limiting block (9) is arranged between the grounding detection electrode (8) and the detection through hole; the online monitoring loop comprises a monitoring light-emitting diode (15), a monitoring power supply (13), a first monitoring switch (16) and a second monitoring switch (17); one end of the first monitoring switch (16) is grounded, and the other end of the first monitoring switch is electrically connected with the monitoring power supply (13), the monitoring light-emitting diode (15) and the detection spring in sequence; one end of the second monitoring switch (17) is grounded, and the other end of the second monitoring switch is electrically connected with the upper end of the detection spring.
2. The high voltage bushing tap grounding on-line monitoring device of claim 1, wherein: the online monitoring loop also comprises a voltage monitoring device (14); the voltage monitoring device (14) is connected in parallel with two ends of the monitoring power supply (13).
3. The high voltage bushing tap grounding on-line monitoring device of claim 2, wherein: the longitudinal section of the grounding detection electrode (8) is T-shaped; the upper end of the grounding detection electrode (8) is arranged in the detection through hole and is positioned above the insulation limiting block (9); the grounding electrode (6) is plate-shaped; the grounding electrode (6) is horizontally arranged in the groove.
4. The high voltage bushing tap grounding on-line monitoring device of claim 3, wherein: the pressing springs (7) are arranged in parallel.
5. The high voltage bushing tap grounding on-line monitoring device of claim 4, wherein: a sealing rainproof cover (10) is arranged at the top end of the end screen grounding cover (4); the detection through hole is positioned in the sealed rainproof cover (10).
6. The high voltage bushing tap grounding on-line monitoring device of claim 5, wherein: between sealed rain-proof cover (10) and the end screen ground connection lid (4) and all through fastening bolt (3) fixed connection between base (1) and end screen ground connection lid (4).
7. The high voltage bushing tap grounding on-line monitoring device of claim 6, wherein: and the fastening bolt (3) is sleeved with a sealing gasket (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921235570.3U CN210626636U (en) | 2019-08-01 | 2019-08-01 | High-tension bushing tap grounding on-line monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921235570.3U CN210626636U (en) | 2019-08-01 | 2019-08-01 | High-tension bushing tap grounding on-line monitoring device |
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| CN210626636U true CN210626636U (en) | 2020-05-26 |
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| CN201921235570.3U Expired - Fee Related CN210626636U (en) | 2019-08-01 | 2019-08-01 | High-tension bushing tap grounding on-line monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112452819A (en) * | 2020-11-02 | 2021-03-09 | 广东电网有限责任公司 | High-voltage bushing tap grounding detection and online monitoring device |
-
2019
- 2019-08-01 CN CN201921235570.3U patent/CN210626636U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112452819A (en) * | 2020-11-02 | 2021-03-09 | 广东电网有限责任公司 | High-voltage bushing tap grounding detection and online monitoring device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200526 Termination date: 20210801 |
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| CF01 | Termination of patent right due to non-payment of annual fee |