CN218181972U - Lightning arrester with on-off function - Google Patents
Lightning arrester with on-off function Download PDFInfo
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- CN218181972U CN218181972U CN202222692594.XU CN202222692594U CN218181972U CN 218181972 U CN218181972 U CN 218181972U CN 202222692594 U CN202222692594 U CN 202222692594U CN 218181972 U CN218181972 U CN 218181972U
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- arrester
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Abstract
The utility model discloses a lightning arrester with a switching-off function, which comprises a lightning arrester shell, a conductive core body, a switching-off guide rod, a bottom plate and an insulating terminal; the top end of the conductive core body is used for being electrically connected with an external circuit; the bottom plate is matched with the bottom end of the lightning arrester shell, and a bottom plate through hole is formed in the bottom plate; the insulating terminal is connected on the bottom plate, and is used for shutoff bottom plate through-hole, is provided with the terminal through-hole with the guide arm adaptation of breaking in the insulating terminal, and the terminal through-hole communicates with each other with the bottom plate through-hole, and the guide arm of breaking stretches into in the arrester housing through terminal through-hole and bottom plate through-hole, and the top of the guide arm of breaking and the bottom electrical connection of electrically conductive core, and the bottom of the guide arm of breaking is provided with the pole head, and pole head detachably connects in the bottom of insulating terminal to but shutoff terminal through-hole. Compare with the scheme of demolising the arrester from GIS among the prior art, the utility model discloses only with the technical scheme easy operation that the guide arm was extracted that cuts off, and can avoid the arrester to bear overvoltage.
Description
Technical Field
The utility model relates to an arrester field, more specifically say, relate to an arrester with cut-off function.
Background
A lightning arrester is installed in a GIS (gas insulated fully-enclosed combined electrical appliance). When testing or maintaining the GIS, if the voltage that GIS applyed has surpassed the voltage that the arrester can bear, need demolish the arrester before experimental or the maintenance to the GIS. Before the lightning arrester is dismantled, the insulating gas in the lightning arrester and a GIS gas chamber adjacent to the lightning arrester needs to be recovered. And after the test or the overhaul is finished, the lightning arrester is installed again, the lightning arrester and the adjacent GIS air chambers are vacuumized and filled with insulating gas, and then the lightning arrester and the adjacent GIS air chambers are required to be subjected to sealing leakage detection.
Therefore, how to avoid the surge arrester from bearing the overvoltage under the condition of not dismantling the surge arrester is a critical problem to be urgently solved by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at avoiding the arrester to bear overvoltage under the condition of not demolising the arrester. In order to achieve the above purpose, the utility model provides a following technical scheme:
a lightning arrester with a switching-off function comprises a lightning arrester shell, a conductive core body, a switching-off guide rod, a bottom plate and an insulating terminal;
the conductive core body is arranged in the lightning arrester shell, and the top end of the conductive core body is used for being electrically connected with an external circuit;
the bottom plate is matched with the bottom end of the lightning arrester shell, a bottom plate through hole is formed in the bottom plate, and the cut-off guide rod penetrates through the bottom plate through hole;
the insulating terminal connect in on the bottom plate, and be used for the shutoff the bottom plate through-hole, be provided with in the insulating terminal with the terminal through-hole of breaking guide arm adaptation, the terminal through-hole with the bottom plate through-hole communicates with each other, the break guide arm passes through the terminal through-hole with the bottom plate through-hole stretches into in the arrester housing, the top of breaking the guide arm with the bottom electrical connection of electrically conductive core, the bottom of breaking the guide arm is provided with the pole head, pole head detachably connect in the bottom of insulating terminal to can the shutoff the terminal through-hole.
Preferably, the breaker further comprises a shield and an insulating support, the top end of the disconnection guide rod is electrically connected with the conductive core through the shield, the bottom end of the insulating support is supported on the bottom plate, the top end of the insulating support is used for supporting the shield, and the insulating support enables a preset insulating distance to be reserved between the shield and the bottom plate.
Preferably, a mounting groove is formed in the end face of the bottom end of the shielding body, a spring contact finger is mounted in the mounting groove, and the top end of the cut-off guide rod is in elastic extrusion contact with the shielding body through the spring contact finger.
Preferably, the insulation terminal includes a tip adapted to the through hole of the base plate, and further includes a flange protruding outward in a radial direction of the insulation terminal relative to the tip, the flange is attached to the bottom end face of the base plate, the flange is provided with a through hole, a locking bolt locks the flange and the base plate through the through hole, and the through hole is a plurality of through holes arranged around an axis of the flange.
Preferably, the rod head is detachably connected to the insulated terminal by a bolt.
Preferably, a sealing groove is formed in the hole wall of the terminal through hole, the sealing groove is arranged around the axis of the terminal through hole, a first sealing ring is arranged in the sealing groove, and the breaking guide rod penetrates through the first sealing ring and extrudes the first sealing ring.
Preferably, a second sealing ring is arranged between the rod head and the bottom end face of the insulated terminal.
Preferably, the top cooperation of arrester casing has basin formula insulator, the top of electrically conductive core is connected with the conducting rod, the top of conducting rod with conductor in the basin formula insulator is connected, conductor and external circuit electrical connection in the basin formula insulator.
Preferably, a sensor is further arranged on the bottom plate and used for detecting the club head, and a signal output end of the sensor is in communication connection with a signal input end of a monitoring system.
Preferably, the arrester housing is provided with a side opening, and the side opening is matched with an explosion-proof device.
It can be seen from the above technical solution that: the utility model discloses in, if will test or overhaul GIS, then just remove the relation of connection of pole head and insulating terminal, after to the guide arm of breaking outward to make the guide arm of breaking break and electrically conductive core disconnection. The GIS can then be tested or overhauled. After the test or the maintenance is finished, the cut-off guide rod is pushed back to the original position to be connected with the conductive core body, and then the rod head is locked on the insulating terminal. Compare with the scheme of demolising the arrester from GIS among the prior art, the utility model discloses only with the technical scheme easy operation that the guide arm was extracted of cutting off, and can avoid the arrester to bear overvoltage.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings used in the description of the embodiments will be briefly described, it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained without inventive work.
Fig. 1 is a front view of a lightning arrester with a switching function according to an embodiment of the present invention;
fig. 2 is a front view of an insulated terminal according to an embodiment of the present invention.
The lightning arrester comprises a base plate, a lightning arrester shell, a conducting rod, a conducting core, a shielding body, a spring contact finger, a breaking guide rod, an insulating terminal, an insulating support, a sensor, a base plate, an explosion-proof device, a self-sealing valve, a rod head, a head and a sealing ring, wherein the base plate comprises 1, 2, 3, 4, a conducting core body, 5, 7, 8, 9, 10, 11, 12, 17, a flange, a terminal through hole and 18, and the base plate through hole is formed in the base plate.
Detailed Description
The utility model discloses an arrester with cut-off function overhauls GIS equipment or can break off the arrester when experimental to avoid dismantling the arrester off, with the reduction maintenance or experimental degree of difficulty.
In the description of the present invention, the terms "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of description of the present invention and does not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The utility model discloses an arrester with cut-off function, this arrester includes arrester casing 2, conductive core 4, bottom plate 11, cuts off guide arm 7 and insulating terminal 8.
Wherein, electrically conductive core 4 sets up in arrester casing 2, and the top of electrically conductive core 4 is used for being connected with external circuit electricity. The base plate 11 is provided with a base plate through hole 18, and the base plate through hole 18 is penetrated by the cut-off guide rod 7. The insulating terminal 8 is connected to the bottom plate 11, and a terminal through hole 17 is provided inside the insulating terminal 8, and the terminal through hole 17 penetrates the insulating terminal 8 in the axial direction. The terminal through-hole 17 communicates with the bottom plate through-hole 18. The disconnection something bar 7 passes through the terminal through-hole 17 and the bottom plate through-hole 18 in order to extend into the surge arrester housing 2. The insulated terminal 8 has not only the function of blocking the through hole 18 of the base plate but also the function of insulating the opening guide bar 7 from the base plate 11.
After the breaking guide rod 7 is inserted into the arrester housing 2, the top end of the breaking guide rod 7 is electrically connected with the bottom end of the conductive core 4. The bottom end of the cut-off guide rod 7 is provided with a rod head 14, the rod head 14 is detachably connected on the insulated terminal 8, and the rod head 14 can block the bottom end hole of the terminal through hole 17. Specifically, the rod head 14 may be bolted to the insulating terminal 8. The rod head 14 may also be connected to the insulated terminal 8 by a snap or screw.
In the present invention, if the GIS is to be tested or repaired, the connection relationship between the rod head 14 and the insulating terminal 8 is released, and then the breaking guide rod 7 is pulled outward, so that the breaking guide rod 7 is disconnected from the conductive core 4. The GIS can then be tested or overhauled. After the test or the maintenance is finished, the breaking guide 7 is pushed back to the original position to be electrically connected with the conductive core 4, and then the rod head 14 is locked on the insulated terminal 8. Compare with the scheme of demolising the arrester from GIS among the prior art, the utility model discloses only with the technical scheme easy operation that guide arm 7 was extracted of cutting off, and can avoid the arrester to bear the overvoltage.
The utility model provides a lightning arrester still includes shielding body 5 and insulating support 9. The shield 5 is directly connected to the bottom end of the conductive core 4. The bottom end of the insulating support 9 is connected to the bottom plate 11, and the top end is connected to the shield 5. The insulating support 9 serves to support the shield 5. The top of the break bar 7 is in contact with the shield 5, i.e. the break bar 7 is electrically connected to the conductive core 4 through the shield 5. The insulating supports 9 serve to provide a predetermined insulating distance between the shield 5 and the bottom plate 11, to prevent leakage currents of the arrester from being conducted to the ground through the bottom plate 11, and to provide sufficient insulation of the arrester when an overvoltage higher than the arrester can withstand is applied across the arrester.
Be provided with the mounting groove on the bottom terminal surface of shield 5, install the spring in this mounting groove and touch and indicate 6 extrusion contact, the top of breaking guide arm 7 touches with the spring and indicates 6 to the realization is with shield 5 in close contact with, improves the stability of being connected with shield 5 electricity. When the opening guide 7 is inserted, the opening guide 7 is inserted into the spring contact finger 6.
The insulated terminal 8 comprises in particular a head 15 and a flange 16. The end head 15 is matched with the through hole 18 of the bottom plate, and the end head 15 of the insulated terminal 8 is sealed in the through hole 18 of the bottom plate. The flange 16 protrudes in the radial direction of the insulated terminal 8 with respect to the tip 15. The flange 16 abuts on the bottom end face of the bottom plate 11. The flange 16 is provided with a through hole through which a locking bolt locks the flange and the base plate.
In the embodiment of the present invention, the flange 16 is designed as an annular flange, and a plurality of through holes are uniformly distributed on the annular flange. In this way, the firmness of the connection between the insulated terminal 8 and the bottom plate 11 can be improved.
In order to avoid the insulating gas of the arrester housing 2 to leak from the insulating terminal 8, the utility model discloses still seal the design to the insulating terminal 8: first, a seal groove is provided on the hole wall of the terminal through-hole 17, the seal groove being arranged around the axis of the terminal through-hole 17. A first sealing ring is arranged in the sealing groove, the cut-off guide rod 7 penetrates through and extrudes the first sealing ring, and the first sealing ring forms axial sealing. After the disconnecting guide rod 7 is pulled out, the disconnecting guide rod 7 is disconnected from the conductive core 4, and at this time, the disconnecting guide rod 7 still fits in the terminal through hole 17 and still forms a sealing fit with the first sealing ring in the sealing groove, so that when the disconnecting guide rod 7 is in a disconnected state, the inside of the arrester housing 2 still maintains a sealing state.
Secondly, the utility model discloses set up the second sealing washer between pole head 14 and insulating terminal 8, locking pole head 14 back on insulating terminal 8, pole head 14 extrudes the second sealing washer on insulating terminal 8's bottom terminal surface, so just formed plane seal. The axial seal and the planar seal can effectively prevent the insulating gas inside the arrester housing 2 from leaking outside.
In order to know whether the arrester is in the on state or the off state through the monitoring system, the utility model discloses set up sensor 10 in the below of bottom plate 11, this sensor 10 is used for detecting club head 14. The signal output of the sensor 10 is communicatively coupled to the signal input of the monitoring system. Specifically, the sensor 10 includes an upper sensor and a lower sensor. After the cut-off guide rod 7 is inserted into the lightning arrester shell 2 and the rod head 14 is locked on the insulating terminal 8, the rod head 14 triggers the upper sensor, the upper sensor sends a signal to a monitoring system, and the monitoring system outputs connection information. After the disconnection guide rod 7 is pulled out, the rod head 14 triggers the lower sensor to send a signal to the monitoring system, and the monitoring system outputs disconnection information.
The top end of the lightning arrester housing 2 is matched with the basin-type insulator 1, and the basin-type insulator 1 can block the top end opening of the lightning arrester housing 2. The basin-type insulator 1 is internally provided with a conductor, the top end of the conductive core body 4 is provided with a conductive rod 3, and the top end of the conductive rod 3 is electrically connected with the conductor inside the basin-type insulator 1. The conductor inside the basin-shaped insulator 1 is electrically connected with an external circuit. The basin-type insulator 1 not only plugs the top opening of the lightning arrester housing 2, but also can form electrical insulation between the conductive core 4 and the lightning arrester housing 2.
The utility model discloses still set up the lateral part opening at the lateral part of arrester casing 2, this lateral part opening fit in has explosion-proof equipment 12. When the pressure in the arrester housing 2 reaches the opening pressure of the bursting disc 12, the bursting disc of the bursting disc 12 will open and the insulating gas in the arrester housing 2 will escape to the atmosphere through the side opening.
Additionally, the utility model discloses still set up at the lateral part of arrester casing 2 and proclaimed oneself valve 13, should proclaimed oneself valve 13 and be used for aerifing to arrester casing 2 is inside.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A lightning arrester with a switching-off function is characterized by comprising a lightning arrester shell, a conductive core body, a switching-off guide rod, a bottom plate and an insulating terminal;
the conductive core body is arranged in the lightning arrester shell, and the top end of the conductive core body is used for being electrically connected with an external circuit;
the bottom plate is matched with the bottom end of the lightning arrester shell, a bottom plate through hole is formed in the bottom plate, and the cut-off guide rod penetrates through the bottom plate through hole;
the insulating terminal connect in on the bottom plate, and be used for the shutoff the bottom plate through-hole, be provided with in the insulating terminal with the terminal through-hole of breaking guide arm adaptation, the terminal through-hole with the bottom plate through-hole communicates with each other, the breaking guide arm passes through the terminal through-hole with the bottom plate through-hole stretches into in the arrester housing, the top of breaking the guide arm with the bottom electrical connection of conductive core, the bottom of breaking the guide arm is provided with the pole head, pole head detachably connect in the bottom of insulating terminal to but the shutoff the terminal through-hole.
2. The surge arrester of claim 1, further comprising a shield and an insulating support, wherein the top end of the breaking guide rod is electrically connected to the conductive core through the shield, the bottom end of the insulating support is supported on the bottom plate, and the top end of the insulating support is used for supporting the shield, and the insulating support provides a predetermined insulating distance between the shield and the bottom plate.
3. The arrester with the on-off function as claimed in claim 2, wherein a mounting groove is provided on a bottom end face of the shielding body, a spring contact finger is mounted in the mounting groove, and a top end of the on-off guide rod is elastically pressed and contacted with the shielding body through the spring contact finger.
4. The surge arrester as claimed in claim 1, wherein the insulated terminal includes a terminal fitting into the through hole of the base plate, and further includes a flange projecting outward in a radial direction of the insulated terminal with respect to the terminal, the flange being in contact with a bottom end surface of the base plate, the flange being provided with a through hole through which a locking bolt locks the flange and the base plate, the through hole being plural in number around an axis of the flange.
5. The surge arrester with switching-off function according to claim 1, wherein the rod head is detachably connected to the insulated terminal by a bolt.
6. The surge arrester with switching-off function according to claim 1, wherein a sealing groove is provided on a wall of the terminal through hole, the sealing groove being arranged around an axis of the terminal through hole, a first sealing ring being provided in the sealing groove, the switching-off guide rod penetrating through the first sealing ring and pressing the first sealing ring.
7. The arrester with breaking function according to claim 1, wherein a second seal ring is provided between the rod head and a bottom end face of the insulated terminal.
8. The arrester with the on-off function according to claim 1, wherein a basin insulator is fitted to a top end of the arrester housing, a conductive rod is connected to a top end of the conductive core, a top end of the conductive rod is connected to a conductor in the basin insulator, and the conductor in the basin insulator is electrically connected to an external circuit.
9. The lightning arrester with switching-off function according to claim 1, wherein a sensor is further arranged on the bottom plate, the sensor is used for detecting the rod head, and a signal output end of the sensor is in communication connection with a signal input end of a monitoring system.
10. A surge arrester with switch-off function according to claim 1, characterized in that a side opening is provided on the surge arrester housing, and the side opening is fitted with an explosion-proof device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222692594.XU CN218181972U (en) | 2022-10-12 | 2022-10-12 | Lightning arrester with on-off function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222692594.XU CN218181972U (en) | 2022-10-12 | 2022-10-12 | Lightning arrester with on-off function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218181972U true CN218181972U (en) | 2022-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222692594.XU Active CN218181972U (en) | 2022-10-12 | 2022-10-12 | Lightning arrester with on-off function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218181972U (en) |
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2022
- 2022-10-12 CN CN202222692594.XU patent/CN218181972U/en active Active
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