CN210296213U - Novel arc extinguishing grid plate type load switch suitable for C4F7N environment-friendly gas - Google Patents
Novel arc extinguishing grid plate type load switch suitable for C4F7N environment-friendly gas Download PDFInfo
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- CN210296213U CN210296213U CN201921472493.3U CN201921472493U CN210296213U CN 210296213 U CN210296213 U CN 210296213U CN 201921472493 U CN201921472493 U CN 201921472493U CN 210296213 U CN210296213 U CN 210296213U
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- Prior art keywords
- arc extinguishing
- arc
- load switch
- extinguishing grid
- static contact
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- 230000003068 static effect Effects 0.000 claims abstract description 33
- 239000012212 insulator Substances 0.000 claims abstract description 16
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000007613 environmental effect Effects 0.000 claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 230000000903 blocking effect Effects 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 239000004020 conductor Substances 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000012827 research and development Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 13
- 230000001965 increasing effect Effects 0.000 description 13
- 230000005520 electrodynamics Effects 0.000 description 12
- 238000010891 electric arc Methods 0.000 description 11
- 230000016507 interphase Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model relates to a novel arc extinguishing grid plate type load switch suitable for C4F7N environmental protection gas, which comprises a mounting seat, wherein an arc extinguishing mechanism and a grounding contact seat are arranged on the mounting seat; the arc extinguishing mechanism comprises a supporting insulator, a stationary contact base and an arc extinguishing chamber, wherein the arc extinguishing chamber comprises an arc extinguishing grid and a plurality of arc extinguishing grid pieces arranged on the arc extinguishing grid; the static contact seat is a right-angle plate, one right-angle edge of the static contact seat is connected with the arc extinguishing grid, the other right-angle edge of the static contact seat is connected with the supporting insulator, and the supporting insulator is connected with the mounting seat; and a current blocking groove and a copper-tungsten arc contact are arranged on a right-angle edge of the static contact seat connected with the arc extinguishing grid. The application is for the special load switch who matches novel environmental protection gas C4F7N and research and development, adopts three station sword formula load switch, and the arc extinguishing mode adopts arc chute formula arc extinguishing, through adjustment load switch structure, reaches the requirement of load switch at the gaseous break-make ability of C4F 7N.
Description
Technical Field
The utility model relates to a power switching equipment technical field especially relates to novel arc extinguishing bars piece formula load switch suitable for C4F7N environmental protection gas.
Background
Due to SF6Emission limits specified as greenhouse gases at the Kyoto conference on prevention of global warming in 1997, prompted the elimination of SF6The birth of the gas switch cabinet. The environmental-friendly gas ring main unit which is easy to expand to high voltage and large capacity technically and economically has great advantages, so that the market is led to SF charging6The requirement of the inflatable ring main unit is gradually decreased year by year to replace SF6The environment-friendly ring main unit of the inflatable ring main unit will become the mainstream of the market and gradually replace SF6Aerify looped netowrk cabinet.
The environment-friendly gas C4F7N has excellent insulating property, arc extinguishing property and environment-friendly property, and the insulating property reaches SF6More than 80%, arc extinguishing performance less than SF65% of the total amount of the catalyst, and the discharge decomposition product is nontoxic, environment-friendly and safe and is SF6Ideal substitute gas.
The breaking performance of the C4F7N gas is better than that of SF6The gas is reduced, so that the conventional load switch cannot meet the requirement of breaking capacity in the C4F7N gas.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's is not enough, provides the novel arc extinguishing bars piece formula load switch who is applicable to C4F7N environmental protection gas, and this application adopts three station sword formula load switch for the special load switch who matches novel environmental protection gas C4F7N and research and development, and the arc extinguishing mode adopts arc extinguishing bars formula arc extinguishing, through adjustment load switch structure, reaches the requirement of load switch breaking capacity in C4F7N is gaseous.
The utility model is realized by the following technical proposal, provides a novel arc extinguishing grid plate type load switch suitable for C4F7N environmental protection gas, which comprises a mounting seat, and an arc extinguishing mechanism and a grounding contact seat are arranged on the mounting seat; the arc extinguishing mechanism comprises a supporting insulator, a stationary contact base and an arc extinguishing chamber, wherein the arc extinguishing chamber comprises an arc extinguishing grid and a plurality of arc extinguishing grid pieces arranged on the arc extinguishing grid; the static contact seat is a right-angle plate, one right-angle edge of the static contact seat is connected with the arc extinguishing grid, the other right-angle edge of the static contact seat is connected with the supporting insulator, and the supporting insulator is connected with the mounting seat; the grounding contact seat and the static contact seat form a three-station disconnecting link through a contact knife connected with a conductor, the contact knife rotates on the conductor under the driving of the insulating main shaft to form a rotating conductive structure, the static contact seat is connected with an upper outgoing line, and the conductor is connected with a lower outgoing line; and a current blocking groove and a copper-tungsten arc contact are arranged on a right-angle edge of the static contact seat connected with the arc extinguishing grid.
Preferably, the arc chute pieces are made of electrician pure iron.
Preferably, the arc extinguishing grid is connected with the right-angle edge of the static contact seat through an elastic pin.
Preferably, the support insulator is connected with the right-angle side of the static contact seat through a bolt.
The utility model has the advantages that:
1. the application is for the special load switch who matches novel environmental protection gas C4F7N and research and development, adopts three station sword formula load switch, and the arc extinguishing mode adopts arc extinguishing bars formula arc extinguishing, through adjustment load switch structure, increases the current breaking groove promptly, increases the arc contact and changes the arc extinguishing bars piece material, reaches load switch in the requirement of C4F7N gaseous break-away ability.
2. The purpose of the current blocking slot on the static contact seat is mainly to change the current flowing through the static contact seat and minimize the length of the I1 current so as to reduce the electrodynamic force of F12 on the arc current I2. The length of the contact knife is increased, the original length of the contact knife is 100mm, the changed length of the contact knife is 150mm, the length of the contact knife is increased by 1.5 times, the corresponding current I3 is increased by 1.5 times, and the electrodynamic force of the current I3 acting on the electric arc is increased by 1.5 times, so that the electrodynamic force of the electric arc current I2 on F32 is increased. Because the length of the current I3 is far greater than that of the current I1, the electrodynamic force F32 borne by the arc current I2 is far greater than that of the current F12, and the arc can move towards the arc extinguishing grid under the action of the electrodynamic force, so that the arc can conveniently enter the arc extinguishing grid plate more smoothly, and the breaking capacity of the load switch is enhanced.
3. By adding the copper-tungsten arc contact on the static contact seat, the arc root of the load switch does not burn the static contact seat made of the purple copper material when the load switch is switched on or switched off, but the arc contact made of the copper-tungsten material with stronger burning resistance is burned, so that the flying-out of metal charged particles is reduced, the positive charge charged particles in a cathode region are reduced, the voltage drop in a near-cathode region is increased, and arc extinction is facilitated.
4. The arc extinguishing grid sheet is made of electrician pure iron, and the electrician pure iron with better magnetic conductivity is selected to replace common carbon steel, so that the electric arc moves at high speed in the groove, the cooling of the electric arc is accelerated, and the arc extinguishing is facilitated.
5. Through increasing the clearance between the arc extinguishing bars piece, the clearance between the current arc extinguishing bars piece is 2mm, and the clearance after the increase is 3mm, can reliably guarantee the insulation between the bars piece under this clearance, prevents to puncture and influences electric arc and is elongated. Make electric arc get into the arc chute fast under the effect of electric power, because of the arc chute piece interval is big, electric arc can be elongated in the arc chute inside, makes the voltage increase that maintains electric arc, does benefit to the arc extinguishing. The arc is elongated to make sufficient contact with C4F7N to carry away some of the heat, thereby enhancing arc energy dissipation.
Drawings
Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;
fig. 2 is a schematic front view of an arc extinguishing mechanism according to embodiment 1 of the present invention;
FIG. 3 is a schematic left side view of the structure of FIG. 2;
fig. 4 is a schematic front view of a static contact base according to embodiment 1 of the present invention;
FIG. 5 is a schematic left side view of the structure of FIG. 4;
FIG. 6 is a schematic top view of the structure of FIG. 4;
fig. 7 is a schematic view of the direction of current and electromotive force according to embodiment 1 of the present invention;
fig. 8 is a schematic structural view of an arc extinguishing grid according to embodiment 2 of the present invention;
fig. 9 is a schematic structural view of an arc extinguishing grid according to embodiment 2 of the present invention;
shown in the figure:
1. the device comprises a supporting insulator, 2, a stationary contact base, 3, an arc extinguishing grid, 4, a copper-tungsten arc contact, 5, an arc extinguishing grid sheet, 6, an elastic pin, 7, a bolt, 8, a current blocking groove, 9, a grounding contact base, 10, a mounting base, 11, a contact knife, 12, a conductor, 13 and an insulating main shaft.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
Example 1:
as shown in fig. 1, the present invention includes a mounting base 10, and an arc extinguishing mechanism and a grounding contact base 9 are mounted on the mounting base 10. As shown in fig. 2 and 3, the arc extinguishing mechanism includes a supporting insulator 1, a stationary contact base 2 and an arc extinguishing chamber, the arc extinguishing chamber includes an arc extinguishing grid 3 and a plurality of arc extinguishing grids 5 installed on the arc extinguishing grid 3, and in this embodiment, the arc extinguishing grid 3 is a semi-closed structure. The static contact seat 2 is a right-angle plate, one of right-angle edges of the static contact seat 2 is connected with the arc extinguishing grid 3, the other right-angle edge of the static contact seat 2 is connected with the supporting insulator 1, and the supporting insulator 1 is connected with the mounting seat 10. The grounding contact seat 9 and the static contact seat 2 form a three-station disconnecting link through a contact knife 11 connected with a conductor 12, the contact knife 11 rotates on the conductor 12 under the driving of an insulating main shaft 13 to form a rotating conductive structure, and the rotating conductive structure is in the existing structural form. The static contact seat 2 is connected with an upper outgoing line, and the conductor 12 is connected with a lower outgoing line.
As shown in fig. 4, 5 and 6, the right-angle edge of the stationary contact 2 connected with the arc-extinguishing grid 3 is provided with a current blocking slot 8 and a copper-tungsten arc contact 4. By adding the copper-tungsten arc contact 4 on the static contact seat 2, the arc root of the load switch does not burn the static contact seat 2 made of the purple copper material when the load switch is switched on or switched off, but the arc contact made of the copper-tungsten material with stronger burning resistance is burned, so that the flying-out of metal charged particles is reduced, the positive charge charged particles in the cathode region are reduced, the voltage drop of the near-cathode region is increased, and arc extinction is facilitated. Referring to fig. 7, the operation of the current interrupt slot 8 will be described, where the current I1 is a current flowing through the stationary contact 2, the current I2 is an arc current at the time of opening, and the current I3 is a current flowing through the contact blade 11. F12 is the electrodynamic force exerted by the arc current I2 in the magnetic field generated by the current I1, and F32 is the electrodynamic force exerted by the arc current I2 in the magnetic field generated by the current I3. The purpose of the current blocking slot 8 on the stationary contact 2 is mainly to modify the current flowing through the stationary contact 2, and to minimize the length of the I1 current, so as to reduce the electrodynamic force of F12 on the arc current I2. The length of the contact knife is increased, the original length of the contact knife is 100mm, the changed length of the contact knife is 150mm, the length of the contact knife is increased by 1.5 times, the corresponding current I3 is increased by 1.5 times, and the electrodynamic force of the current I3 acting on the electric arc is increased by 1.5 times, so that the electrodynamic force of the electric arc current I2 on F32 is increased. Because the length of the current I3 is far greater than that of the current I1, the electrodynamic force F32 borne by the arc current I2 is far greater than that of the current F12, and the arc can move towards the arc extinguishing grid under the action of the electrodynamic force, so that the arc can conveniently enter the arc extinguishing grid plate more smoothly, and the breaking capacity of the load switch is enhanced.
In this embodiment, the arc-extinguishing grid 5 is made of electrical pure iron, and the electrical pure iron with better magnetic permeability is used to replace common carbon steel, so that the arc moves at high speed in the groove, the cooling of the arc is accelerated, and the arc is extinguished conveniently.
In the embodiment, the right-angle sides of the arc-extinguishing grid 3 and the static contact seat 2 are connected through the elastic pin 6.
In the present embodiment, the right-angled edges of the support insulator 1 and the stationary contact 2 are connected by bolts 7.
Example 2:
the difference between the embodiment 2 and the embodiment 1 is that the structures of the arc-extinguishing grids and the arc-extinguishing grid pieces are changed, as shown in fig. 8, the arc-extinguishing grids are of a fully-closed structure, the arc-extinguishing grid pieces are wrapped in the arc-extinguishing grids, the arc-extinguishing grids are changed into a fully-closed structure from a semi-closed structure, the interphase arc is protected from being broken down, and the interphase insulation reliability is improved. As shown in fig. 9, the bottom of the arc-extinguishing grid piece is a straight groove, the bottom of the arc-extinguishing grid piece is changed from a stepped groove to a straight groove, and the size of the bottom of the arc-extinguishing grid piece is reduced (the size of the arc motion space is not changed), so that the arc magnetic field is more concentrated, and the initial arc smoothly enters the arc-extinguishing grid under the action of the magnetic field. Because the slot size of the tail end of the original arc-extinguishing grid piece is larger, the electric arc can move to two sides under the influence of interphase electromotive force, and interphase breakdown is easy to cause. The width of the groove at the bottom of the arc-extinguishing grid is reduced, the groove depth is deepened, and the arc breakdown caused by the arc under the action of the interphase electric power is prevented. Arc interphase breakdown is prevented when the arc is cut off and reliable cut-off is ensured by changing the width of the slot of the arc chute, reducing the width of the bottom and completely wrapping the arc chute.
Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.
Claims (4)
1. Novel arc extinguishing bars piece formula load switch suitable for C4F7N environmental protection gas, its characterized in that: comprises a mounting seat (10), wherein an arc extinguishing mechanism and a grounding contact seat (9) are arranged on the mounting seat (10); the arc extinguishing mechanism comprises a supporting insulator (1), a stationary contact seat (2) and an arc extinguishing chamber, wherein the arc extinguishing chamber comprises an arc extinguishing grid frame (3) and a plurality of arc extinguishing grid pieces (5) arranged on the arc extinguishing grid frame (3); the static contact seat (2) is a right-angle plate, one right-angle edge of the static contact seat (2) is connected with the arc extinguishing grid (3), the other right-angle edge of the static contact seat (2) is connected with the supporting insulator (1), and the supporting insulator (1) is connected with the mounting seat (10); the grounding contact seat (9) and the static contact seat (2) form a three-station disconnecting link through a contact knife (11) connected with a conductor (12), the contact knife (11) is driven by an insulating main shaft (13) to rotate on the conductor (12) to form a rotating conductive structure, the static contact seat (2) is connected with an upper outgoing line, and the conductor (12) is connected with a lower outgoing line; and a current blocking groove (8) and a copper-tungsten arc contact (4) are arranged on a right-angle side where the static contact seat (2) is connected with the arc extinguishing grid (3).
2. The new arc chute plate type load switch suitable for C4F7N eco-gas as claimed in claim 1, wherein: the arc extinguishing grid plate (5) is made of electrician pure iron.
3. The new arc chute plate type load switch suitable for C4F7N eco-gas as claimed in claim 1, wherein: the arc extinguishing grid (3) is connected with the right-angle edge of the static contact seat (2) through an elastic pin (6).
4. The novel arc chute plate type load switch suitable for the environmental protection gas of C4F7N as claimed in claim 3, wherein: the right-angle sides of the supporting insulator (1) and the static contact seat (2) are connected through bolts (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921472493.3U CN210296213U (en) | 2019-09-05 | 2019-09-05 | Novel arc extinguishing grid plate type load switch suitable for C4F7N environment-friendly gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921472493.3U CN210296213U (en) | 2019-09-05 | 2019-09-05 | Novel arc extinguishing grid plate type load switch suitable for C4F7N environment-friendly gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210296213U true CN210296213U (en) | 2020-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921472493.3U Withdrawn - After Issue CN210296213U (en) | 2019-09-05 | 2019-09-05 | Novel arc extinguishing grid plate type load switch suitable for C4F7N environment-friendly gas |
Country Status (1)
| Country | Link |
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| CN (1) | CN210296213U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110581042A (en) * | 2019-09-05 | 2019-12-17 | 山东泰开电力开关有限公司 | Novel arc extinguishing grid plate type load switch suitable for C4F7N environment-friendly gas |
-
2019
- 2019-09-05 CN CN201921472493.3U patent/CN210296213U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110581042A (en) * | 2019-09-05 | 2019-12-17 | 山东泰开电力开关有限公司 | Novel arc extinguishing grid plate type load switch suitable for C4F7N environment-friendly gas |
| CN110581042B (en) * | 2019-09-05 | 2024-04-09 | 山东泰开电力开关有限公司 | Novel arc extinguishing grid piece formula load switch suitable for C4F7N environmental protection gas |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200410 Effective date of abandoning: 20240409 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200410 Effective date of abandoning: 20240409 |