CN115763143A - Rotary arc extinguishing type three-station isolation grounding switch of 252kV combined electrical apparatus - Google Patents
Rotary arc extinguishing type three-station isolation grounding switch of 252kV combined electrical apparatus Download PDFInfo
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- CN115763143A CN115763143A CN202211186332.4A CN202211186332A CN115763143A CN 115763143 A CN115763143 A CN 115763143A CN 202211186332 A CN202211186332 A CN 202211186332A CN 115763143 A CN115763143 A CN 115763143A
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Abstract
The invention relates to a rotary arc extinguishing type three-station isolating grounding switch of a 252kV combined electrical appliance, which comprises a shell, wherein a conductor is installed in the shell, a transmission connecting lever is installed in the conductor, one side of the transmission connecting lever is connected with one end of an isolating connecting rod, the other side of the transmission connecting lever is connected with one end of a grounding connecting rod, the other end of the isolating connecting rod is connected with an isolating moving contact, the other end of the grounding connecting rod is connected with a grounding moving contact, a spring contact finger is arranged on the outer side of the isolating moving contact, a watchband contact finger is arranged on the outer side of the grounding moving contact, a isolating switch is arranged below the isolating moving contact, an isolating static arc contact is arranged on the isolating switch, an isolating arc extinguishing coil is installed in the isolating switch, a grounding switch is arranged on the right side of the grounding moving contact, and a grounding static arc contact is arranged on the grounding switch. The invention has the beneficial effects that: the volume is small, and the occupied area is small; when the open-close bus transfers current and closes rated short-circuit current, the electric arc energy is reduced, and the reliability and safety of the product are ensured.
Description
(I) technical field
The invention belongs to the technical field of power switch equipment, and particularly relates to a rotary arc-extinguishing type three-station isolating grounding switch of a 252kV combined electrical appliance.
(II) background of the invention
With the continuous development of scientific technology and the application of high and new technology, the transformer substation equipment has become a development trend with easy operation, miniaturization, compactness, intellectualization and high operation reliability. The 252kV combined electrical appliance has the advantages of high reliability, high integration degree, good safety, short installation period, convenience in maintenance and the like, and is widely applied to transmission and transformation lines. In recent years, with the increasing land acquisition cost of each provincial and municipal substation, a product with small size, strong breaking capacity and high safety is urgently needed to ensure the operation quality of a power grid. At present, in the field of 252kV combined electrical appliances, in China, various major mainstream suppliers consider that safety margin, bus side, line side disconnecting switches, grounding switches and fast grounding switches are all split structures, the disconnecting switches need to have the capability of switching bus transfer currents 2400A and 350v for 100 times, and the fast grounding switches need to have the capability of switching rated short-circuit current 125kA twice, so that the whole interval volume is too large. How to give consideration to small occupied area and small volume, and the capacity of transferring current of an open-close bus and closing rated short-circuit current can be ensured, which becomes a difficult problem to be solved urgently.
Disclosure of the invention
In order to make up for the defects of the prior art, the invention provides the rotary arc extinguishing type three-station isolating grounding switch of the 252kV combined electrical appliance, which has the advantages of small occupied area, small volume and capabilities of switching on and off bus transfer current and switching off rated short-circuit current.
The invention is realized by the following technical scheme:
the utility model provides a rotatory three station isolation earthing switch of arc extinguishing formula of 252kV combined electrical apparatus, includes the casing, installs conductor, characterized by in the casing: install the transmission connecting lever in the conductor, transmission connecting lever one side is connected with isolation connecting rod one end, transmission connecting lever opposite side is connected with ground connection connecting rod one end, the isolation connecting rod other end is connected with the isolation moving contact, the ground connection connecting rod other end is connected with the ground connection moving contact, it touches the finger to establish the spring outside the isolation moving contact, the watchband is established outside the ground connection moving contact and is touched the finger, isolation moving contact below is equipped with isolator, isolator is last to be equipped with the isolation static arc contact, isolator installs isolation arc extinguishing coil in, the right-hand earthing switch that is equipped with of ground connection moving contact, the last static arc contact that is equipped with of ground connection earthing switch, install ground connection arc extinguishing coil in the earthing switch.
The outer side of the spring contact finger is provided with an isolation plum blossom contact finger, and the outer side of the isolation plum blossom contact finger is provided with an isolation shielding cover.
The outer side of the watchband contact finger is provided with a grounding plum blossom contact finger, and the outer side of the grounding plum blossom contact finger is provided with a grounding shielding cover.
And an isolating switch plum blossom contact finger is arranged on the outer side of the isolating static arc contact, and an isolating switch shielding cover is arranged on the outer side of the isolating switch plum blossom contact finger.
And the outer side of the grounding static arc contact is provided with a grounding switch plum blossom contact finger, and the outer side of the grounding switch plum blossom contact finger is provided with a grounding switch shielding cover.
Isolation guide sleeves are arranged on two sides of the isolation connecting rod, and grounding guide sleeves are arranged on two sides of the grounding connecting rod.
The transmission crank arm is arranged in the conductor through the transmission shaft.
The conductor is installed in the shell through a left insulator, and the isolating switch is installed in the shell through a lower insulator.
The grounding switch is connected with a grounding handle arranged outside the shell.
The beneficial effects of the invention are: the split type isolating switch and the grounding switch are converted into a three-station isolating grounding switch through a rotary transmission structure, so that the volume is small and the occupied area is small; when the switching bus transfers current and the rated short-circuit current is switched off, enough rotating magnetic field force is generated by the short-circuit current through the arc extinguishing coil, so that the energy of the electric arc is greatly reduced, the electric arc is smoothly extinguished, and the reliability and the safety of a product are ensured.
Description of the drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural diagram of a closing state of the present invention;
FIG. 3 is a schematic structural diagram of the switching-off state of the present invention;
in the figure, 1 shell, 2 conductor, 3 transmission crank arm, 4 isolation link rod, 5 grounding link rod, 6 isolation moving contact, 7 grounding moving contact, 8 spring contact finger, 9 watchband contact finger, 10 isolation switch, 11 isolation static arc contact, 12 isolation arc extinguishing coil, 13 grounding switch, 14 grounding static arc contact, 15 grounding arc extinguishing coil, 16 isolation plum blossom contact finger, 17 isolation shield, 18 grounding plum blossom contact finger, 19 grounding shield, 20 isolation switch plum blossom contact finger, 21 isolation switch shield, 22 grounding switch plum blossom contact finger, 23 grounding switch shield, 24 isolation guide sleeve, 25 grounding guide sleeve, 26 transmission shaft, 27 left insulator, 28 lower insulator, 29 grounding handle, 30 isolation moving contact at closing position, 31 grounding moving contact at closing position.
(V) detailed description of the preferred embodiments
The attached drawing is an embodiment of the invention. This embodiment includes casing 1, install conductor 2 in the casing 1, install transmission turning arm 3 in the conductor 2, transmission turning arm 3 one side is connected with 4 one ends of isolation connecting rod, 3 opposite sides of transmission turning arm are connected with 5 one ends of ground connection connecting rod, the isolation connecting rod 4 other end is connected with isolation moving contact 6, the ground connection connecting rod 5 other end is connected with ground connection moving contact 7, it touches finger 8 to establish the spring outside isolation moving contact 6, the watchband is established outside ground connection moving contact 7 touches finger 9, 6 below isolation moving contact is equipped with isolator 10, isolator 10 is last to be equipped with isolation static arc contact 11, isolator 10 is internal to install isolation arc extinguishing coil 12, the right-hand earthing switch 13 that is equipped with of ground connection moving contact 7, be equipped with ground connection static arc contact 14 on earthing switch 13, install ground connection arc extinguishing coil 15 in earthing switch 13. An isolation plum blossom contact finger 16 is arranged on the outer side of the spring contact finger 8, and an isolation shielding cover 17 is arranged on the outer side of the isolation plum blossom contact finger 16. The outer side of the watchband contact finger 9 is provided with a grounding plum blossom contact finger 18, and the outer side of the grounding plum blossom contact finger 18 is provided with a grounding shielding case 19. And an isolating switch plum blossom contact finger 20 is arranged on the outer side of the isolating static arc contact 11, and an isolating switch shielding cover 21 is arranged on the outer side of the isolating switch plum blossom contact finger 20. And an earthing switch plum blossom contact finger 22 is arranged on the outer side of the earthing static arc contact 14, and an earthing switch shielding cover 23 is arranged on the outer side of the earthing switch plum blossom contact finger 22. Isolation guide sleeves 24 are arranged on two sides of the isolation connecting rod 4, and grounding guide sleeves 25 are arranged on two sides of the grounding connecting rod 5. The transmission crank arm 3 is installed in the conductor 2 through a transmission shaft 26. The conductor 2 is mounted in the housing 1 via a left insulator 27, and the disconnector 10 is mounted in the housing 1 via a lower insulator 28. The grounding switch 13 is connected to a grounding lever 29 mounted outside the housing 1.
By adopting the rotary arc extinguishing type three-station isolating grounding switch of the 252kV combined electrical apparatus, a conductor 2 is arranged on a left insulator 27, a transmission crank arm 3 is arranged in the conductor 2 through a transmission shaft 26, connecting rods are respectively arranged on two sides of the transmission crank arm 3, the connecting rods are respectively fixedly connected with an isolating moving contact 6 and a grounding moving contact 7 and are fixedly separated from the conductor 2 through a guide sleeve, and a plum-blossom contact finger and a shielding case are respectively arranged at the tail end of the middle part of the connecting rod. The isolation side and the grounding side are respectively provided with a static arc contact, an arc extinguishing coil, a plum blossom contact finger and a shielding cover, and are fixed on the lower insulator 28. On the side of the isolating switch 10, a form of combining the spring contact finger 8 with the plum blossom contact finger is selected for ensuring the same-current conducting structure, and on the side of the grounding switch 13, a form of combining the watchband contact finger 9 with the plum blossom contact finger is selected for ensuring the same-current conducting structure.
When isolation switching-on is carried out, the transmission connecting lever 3 drives the isolation connecting rod 4 to move downwards through the transmission shaft 26, the isolation connecting rod 4 drives the isolation moving contact 6 to move downwards along the direction of the isolation guide sleeve 24, the isolation moving contact 6 contacts the isolation static arc contact 11 firstly, the isolation moving contact 6 is thoroughly contacted with the isolation static arc contact 11 when the switching-on is in place, the current is in electrical contact with the spring contact finger 8 through the conducting rod to realize the effect of reliably transferring the current, and the self-recovery performance of the compression deformation of the spring contact finger 8 and the isolation switch plum blossom contact finger 20 avoids the influence of collision damage caused by uneven hardness of the conducting rod and the inner insert. The isolating and arc-extinguishing coil 12 with corresponding turns is arranged in the isolating switch 10 in advance, energized current generates Lorentz force to the arc through the magnetic field generated by the conducting rod, the arc rotates along the periphery of the conducting rod at high speed, the current generates electrodynamic force in the opposite direction through the isolating and arc-extinguishing coil 12, the Lorentz force generated by the arc is greatly reduced through energy conservation, burning loss and charged particles are reduced, and the on-off is facilitated.
When isolation separating brake is carried out, the transmission connecting lever 3 drives the isolation connecting rod 4 to move upwards through the transmission shaft 26, the isolation connecting rod 4 drives the isolation moving contact 6 to move upwards along the direction of the isolation guide sleeve 24, the electrifying current flows through the isolation moving contact 6 to reach the stationary contact base, under the action of the isolation arc-extinguishing coil 12, the isolation moving contact 6 moves upwards, the current flows through the isolation arc-extinguishing coil 12 to generate electrodynamic force in the opposite direction, the Lorentz force generated by electric arcs is greatly reduced through energy conservation, along with the separating brake, the isolation moving contact 6 is in place through the spring contact fingers 8 and the isolation plum blossom contact fingers 16 to ensure the through-current capacity, the electric conductivity is good, and the capacity of transferring current of an opening and closing bus is greatly improved.
When the grounding switch is switched on, the transmission connecting lever 3 drives the grounding connecting rod 5 to move rightwards through the transmission shaft 26, the grounding connecting rod 5 drives the grounding moving contact 7 to move rightwards along the direction of the grounding guide sleeve 25, the grounding moving contact 7 contacts the grounding static arc contact 14 firstly, the grounding moving contact 7 is thoroughly contacted with the grounding static arc contact 14 when the switch is switched on in place, the current is in electrical contact with the watchband contact finger 9 through the conducting rod to realize the effect of reliably transmitting the current, and the watchband contact finger 9 and the grounding switch plum blossom contact finger 22 are in compression deformation and self-recovery performance, so that the influence of collision damage caused by uneven hardness of the conducting rod and the embedded part is avoided. The grounding arc-extinguishing coil 15 with corresponding turns is arranged in the grounding switch 13 in advance, energized current generates Lorentz force on the arc through a magnetic field generated by the conducting rod, the arc rotates at high speed along the periphery of the conducting rod, the current generates electrodynamic force in the opposite direction through the grounding arc-extinguishing coil 15, the Lorentz force generated by the arc is greatly reduced through energy conservation, burning loss and charged particles are reduced, and the on-off is facilitated.
When the grounding tripping is carried out, the transmission crank arm 3 drives the grounding connecting rod 5 to move leftwards through the transmission shaft 26, the grounding connecting rod 5 drives the grounding moving contact 7 to move leftwards along the direction of the grounding guide sleeve 25, the electrifying current flows through the grounding moving contact 7 to reach the stationary contact seat, under the action of the grounding arc-extinguishing coil 15, the grounding moving contact 7 moves leftwards, the current flows through the grounding arc-extinguishing coil 15 to generate electrodynamic force in the opposite direction, the Lorentz force generated by electric arcs is greatly reduced through energy conservation, along with the tripping in place, the grounding moving contact 7 is in multipoint contact with the grounding plum-blossom contact finger 18 through the watchband contact finger 9 to ensure the through-current capability, the conductivity is good, and the capability of switching on and off rated short-circuit current is greatly improved.
Claims (9)
1. The utility model provides a rotatory three station isolation earthing switch of arc extinguishing formula of 252kV combined electrical apparatus, includes casing (1), installs conductor (2), characterized by in casing (1): install transmission connecting lever (3) in conductor (2), transmission connecting lever (3) one side is connected with isolation connecting rod (4) one end, transmission connecting lever (3) opposite side is connected with ground connection connecting rod (5) one end, isolation connecting rod (4) other end is connected with isolation moving contact (6), ground connection connecting rod (5) other end is connected with ground connection moving contact (7), it touches finger (8) to establish the spring outside isolation moving contact (6), establish the watchband outside ground connection moving contact (7) and touch finger (9), it is equipped with isolator (10) to keep apart moving contact (6) below, be equipped with on isolator (10) and keep apart static arc contact (11), install isolation arc extinguishing coil (12) in isolator (10), ground connection moving contact (7) right-hand earthing switch (13) that is equipped with, be equipped with ground connection static arc contact (14) on earthing switch (13), install earthing arc extinguishing coil (15) in earthing switch (13).
2. The rotary arc extinguishing type three-position isolating grounding switch of the 252kV combined electrical appliance, which is characterized in that: the outer side of the spring contact finger (8) is provided with an isolation plum blossom contact finger (16), and the outer side of the isolation plum blossom contact finger (16) is provided with an isolation shielding cover (17).
3. The rotary arc extinguishing type three-position isolating grounding switch of the 252kV combined electrical appliance, which is characterized in that: and a grounding plum blossom contact finger (18) is arranged on the outer side of the watchband contact finger (9), and a grounding shielding cover (19) is arranged on the outer side of the grounding plum blossom contact finger (18).
4. The rotary arc extinguishing type three-position isolating grounding switch of the 252kV combined electrical appliance, which is characterized in that: and an isolating switch plum blossom contact finger (20) is arranged on the outer side of the isolating static arc contact (11), and an isolating switch shielding cover (21) is arranged on the outer side of the isolating switch plum blossom contact finger (20).
5. The rotary arc extinguishing type three-position isolating grounding switch of the 252kV combined electrical appliance, which is characterized in that: and a grounding switch plum blossom contact finger (22) is arranged on the outer side of the grounding static arc contact (14), and a grounding switch shielding cover (23) is arranged on the outer side of the grounding switch plum blossom contact finger (22).
6. The rotary arc extinguishing type three-position isolating grounding switch of the 252kV combined electrical appliance, which is characterized in that: isolation guide sleeves (24) are arranged on two sides of the isolation connecting rod (4), and grounding guide sleeves (25) are arranged on two sides of the grounding connecting rod (5).
7. The rotary arc extinguishing type three-position isolating grounding switch of the 252kV combined electrical appliance, which is characterized in that: the transmission crank arm (3) is arranged in the conductor (2) through a transmission shaft (26).
8. The rotary arc extinguishing type three-position isolating grounding switch of the 252kV combined electrical appliance, which is characterized in that: the conductor (2) is installed in the shell (1) through a left insulator (27), and the isolating switch (10) is installed in the shell (1) through a lower insulator (28).
9. The rotary arc extinguishing type three-position isolating grounding switch of the 252kV combined electrical appliance, which is characterized in that: the grounding switch (13) is connected with a grounding handle (29) arranged outside the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211186332.4A CN115763143A (en) | 2022-09-28 | 2022-09-28 | Rotary arc extinguishing type three-station isolation grounding switch of 252kV combined electrical apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211186332.4A CN115763143A (en) | 2022-09-28 | 2022-09-28 | Rotary arc extinguishing type three-station isolation grounding switch of 252kV combined electrical apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115763143A true CN115763143A (en) | 2023-03-07 |
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ID=85350364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211186332.4A Pending CN115763143A (en) | 2022-09-28 | 2022-09-28 | Rotary arc extinguishing type three-station isolation grounding switch of 252kV combined electrical apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115763143A (en) |
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2022
- 2022-09-28 CN CN202211186332.4A patent/CN115763143A/en active Pending
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