CN220290696U - Vacuum interrupter and vacuum circuit breaker of 40.5KV - Google Patents
Vacuum interrupter and vacuum circuit breaker of 40.5KV Download PDFInfo
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- CN220290696U CN220290696U CN202321875411.6U CN202321875411U CN220290696U CN 220290696 U CN220290696 U CN 220290696U CN 202321875411 U CN202321875411 U CN 202321875411U CN 220290696 U CN220290696 U CN 220290696U
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- moving contact
- vacuum interrupter
- guide rod
- vacuum
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- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000003068 static effect Effects 0.000 claims 1
- 230000007246 mechanism Effects 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The utility model belongs to the technical field of high-voltage electrical appliances, and discloses a vacuum arc-extinguishing chamber and a 40.5KV vacuum circuit breaker. The vacuum arc-extinguishing chamber comprises a fixed contact and a movable contact which can be closed and opened with the fixed contact, the contact surfaces of the movable contact and the fixed contact are circular, and the diameters of the movable contact and the fixed contact are not less than 98mm and not more than 108mm; when the movable contact and the fixed contact are connected, the contact pressure range of the movable contact and the fixed contact is 3100N-3500N; the vacuum circuit breaker of 40.5KV comprises a transmission shaft and a vacuum arc-extinguishing chamber above, wherein the transmission shaft is in transmission connection with the moving contact. The vacuum arc-extinguishing chamber and the 40.5KV vacuum circuit breaker can be used in a low-frequency alternating current environment with 20Hz and 40.5KV voltage, and the reliable breaking of a power utilization line is ensured.
Description
Technical Field
The utility model relates to the technical field of high-voltage electrical appliances, in particular to a vacuum arc-extinguishing chamber and a 40.5KV vacuum circuit breaker.
Background
The 20Hz vacuum circuit breaker is mainly suitable for offshore wind power low-frequency power transmission and distribution occasions and is used as control and protection equipment. The low-frequency power transmission and distribution is a high-cost-performance solution suitable for a novel power system in recent years, and solves the problems of short alternating-current transmission distance and high direct-current transmission cost.
At present, under the use environment that the frequency is 50Hz and the voltage is 40.5KV, the contact diameter of the vacuum circuit breaker is 78mm, but when the vacuum circuit breaker with the specification is applied to the use environment of 20Hz, the breaking capacity is only 63.2% under the use environment of 50Hz, and the arcing time is prolonged in the low-frequency alternating current breaking of 20Hz, but the breaking requirement under the long-time arcing cannot be met by the vacuum arc extinguishing chamber of the conventional 50Hz circuit breaker, and the effective breaking cannot be realized in the low-frequency state.
Disclosure of Invention
The utility model aims to provide a vacuum arc-extinguishing chamber and a 40.5KV vacuum circuit breaker, which can be used in a low-frequency alternating current environment with 20Hz and 40.5KV voltage and ensure the reliable breaking of a power utilization line.
To achieve the purpose, the utility model adopts the following technical scheme:
the vacuum interrupter can be used for a vacuum circuit breaker with the frequency of 20Hz and the voltage of 40.5KV, and comprises:
a stationary contact;
the movable contact can be closed and opened with the fixed contact;
the contact surfaces of the moving contact and the fixed contact are circular, and the contact diameters of the moving contact and the fixed contact are not less than 98mm and not more than 108mm; when the movable contact and the fixed contact are connected, the contact pressure range of the movable contact and the fixed contact is 3100N-3500N.
As an alternative scheme of the vacuum arc-extinguishing chamber, the vacuum arc-extinguishing chamber further comprises an insulating shell, and the fixed contact and the moving contact are arranged in the insulating shell.
As an alternative scheme of the vacuum arc-extinguishing chamber, the moving contact and the fixed contact are both in cup-shaped longitudinal magnetic structures.
As an alternative scheme of the vacuum arc-extinguishing chamber, one end of the moving contact, which is far away from the fixed contact, is connected with a guide rod, the guide rod penetrates through the insulating shell, one end of the guide rod is electrically connected with the moving contact, the other end of the guide rod is electrically connected with an external circuit, and the guide rod can drive the moving contact to be closed and opened with the fixed contact.
As an alternative scheme of the vacuum arc extinguishing chamber, a shielding cover is arranged in the insulating shell, and the shielding cover is arranged on the peripheries of the moving contact and the fixed contact at intervals.
As an alternative to a vacuum interrupter, a seal is provided in the vacuum interrupter, which seal enables a dynamic seal to be maintained between the guide rod and the insulating housing.
As an alternative scheme of the vacuum arc-extinguishing chamber, the sealing element is a corrugated pipe, the corrugated pipe is sleeved on the guide rod, one end of the corrugated pipe is connected with the insulating shell, and the other end of the corrugated pipe is connected with the outer wall of the guide rod.
As an alternative to a vacuum interrupter, the insulating shell is a ceramic shell.
The vacuum circuit breaker of 40.5KV comprises a transmission shaft and the vacuum arc extinguishing chamber according to any scheme, wherein the transmission shaft is in transmission connection with the moving contact.
As an alternative to a 40.5KV vacuum circuit breaker, the 40.5KV vacuum circuit breaker further comprises a spring operating mechanism, the spring operating mechanism being in driving connection with the transmission shaft.
The beneficial effects are that:
according to the first aspect of the utility model, the contact diameters of the moving contact and the fixed contact are in the range of not less than 98mm and not more than 108mm, so that the vacuum arc extinguishing chamber can reliably break in a low-frequency alternating current environment with the voltage of 40.5KV at 20Hz, and meanwhile, the contact pressure between the moving contact and the fixed contact is in the range of 3100N-3500N, the reliable contact between the moving contact and the fixed contact can be ensured, the connection of a power line is stable, and the breaking state is good.
In the second aspect of the utility model, the vacuum circuit breaker with the vacuum arc extinguishing chamber can be stably carried and reliably disconnected in a low-frequency alternating current environment with 20Hz and 40.5KV voltage.
Drawings
Fig. 1 is a front view of a vacuum interrupter provided in an embodiment of the present utility model;
fig. 2 is a front view of a 40.5KV vacuum interrupter provided by an embodiment of the present utility model;
fig. 3 is a left side view of a 40.5KV vacuum interrupter provided by an embodiment of the present utility model.
In the figure:
1. a stationary contact; 2. a moving contact; 3. an insulating case; 4. a guide rod; 5. a shield; 6. a bellows;
100. a transmission shaft; 200. a spring operating mechanism; 300. a vacuum arc extinguishing chamber; 400. a circuit breaker frame.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
Referring to fig. 1, a first aspect of the present embodiment relates to a vacuum interrupter, which can be used on a vacuum circuit breaker with a frequency of 20Hz and a voltage of 40.5KV, and specifically includes a fixed contact 1 and a moving contact 2 that can be closed and opened with the fixed contact 1, wherein a contact surface of the moving contact 2 and the fixed contact 1 is circular, and a contact diameter of the moving contact 2 and the fixed contact 1 is not less than 98mm and not more than 108mm; when the movable contact 2 and the fixed contact 1 are connected, the contact pressure of the movable contact 2 and the fixed contact 1 ranges from 3100N to 3500N.
In this embodiment, i=3.079×10 according to the existing empirical formula -3 *D 2 *B Z 0.4 (wherein I is the limit breaking current, D is the contact diameter and B Z Longitudinal magnetic induction) and i=0.83×d 1.57 /d 0.82 As is known from the fact that the limit breaking current I is positively correlated with the contact diameter D, and the breaking current of the vacuum circuit breaker can be increased by reducing the frequency, so that in order to obtain the vacuum circuit breaker with the adaptation frequency of 20Hz and the voltage of 40.5KV, the contact surface area of the moving contact 2 and the fixed contact 1 can be increased by the existing vacuum circuit breaker with the adaptation frequency of 50Hz and the voltage of 40.5KV, the contact diameter range of the moving contact 2 and the fixed contact 1 is not less than 98mm and not more than 108mm, the contact pressure range is ensured to be 3100N-3500N, and the reliable contact and the connection stability of a power line of the moving contact 2 and the fixed contact 1 can be ensured.
Optionally, the vacuum arc-extinguishing chamber further comprises an insulating shell 3, and the fixed contact 1 and the moving contact 2 are arranged in the insulating shell 3. The insulating shell 3 is used for isolating the contact system of the fixed contact 1 and the movable contact 2 from the external environment and preventing the influence of external air on the fixed contact 1 and the movable contact 2.
Preferably, the insulating shell 3 is a ceramic shell, and the ceramic shell has the advantages of low cost and good isolation effect on electric arcs.
Optionally, the moving contact 2 and the fixed contact 1 are both cup-shaped longitudinal magnetic structures. The cup-shaped longitudinal magnetic structure has a good arc guiding effect, and can effectively guide an arc between poles in the separation process of the moving contact 2 and the fixed contact 1, prevent the arc from splashing, and improve the arc extinguishing effect and the service life of the whole vacuum arc extinguishing chamber.
Optionally, one end of the moving contact 2 far away from the fixed contact 1 is connected with a guide rod 4, the guide rod 4 penetrates through the insulating shell 3, one end of the guide rod 4 is electrically connected with the moving contact 2, the other end of the guide rod 4 is electrically connected with an external circuit, and the guide rod 4 can drive the moving contact 2 to be closed and opened with the fixed contact 1. The guide rod 4 is used as a driving member of the moving contact 2, and can close and open the moving contact 2 and the fixed contact 1 in a given movement direction of the insulating shell 3. In this embodiment, the guide rod 4 is a metal cylinder, which can drive and conduct a circuit.
Further, a shield 5 is provided inside the insulating housing 3, and the shield 5 is provided on the outer circumferences of the moving contact 2 and the fixed contact 1 at a spacing. In order to further prevent high-heat electric arc from splashing to the insulating shell 3, ablation is generated on the insulating shell 3, a shielding cover 5 is sleeved on the peripheries of the moving contact 2 and the fixed contact 1, an arcing region after the moving contact 2 and the fixed contact 1 are pulled out is covered, the electric arc generated can be prevented from splashing to the periphery, the attenuation of residual plasma after the electric arc is extinguished is facilitated, and the insulating shell 3 is prevented from being polluted.
Optionally, a seal is provided in the vacuum interrupter, which seal enables a dynamic seal to be maintained between the guide rod 4 and the insulating housing 3. Specifically, the sealing element is a corrugated pipe 6, the corrugated pipe 6 is sleeved on the guide rod 4, one end of the corrugated pipe 6 is connected with the insulating shell 3, and the other end of the corrugated pipe is connected with the outer wall of the guide rod 4.
In the embodiment, in the reciprocating motion process of the guide rod 4, the dynamic sealing requirement between the guide rod 4 and the insulating shell 3 is required to be ensured, and the isolation of the internal environment and the external environment of the insulating shell 3 is ensured; by arranging the corrugated pipe 6, the guide rod 4 can be ensured to effectively realize dynamic sealing of the vacuum arc extinguishing chamber in the reciprocating motion process of the insulating shell 3.
Referring to fig. 2 and 3, another aspect of the present embodiment further relates to a vacuum circuit breaker (hereinafter referred to as a "vacuum circuit breaker") of 40.5KV, which includes a transmission shaft 100 and the above vacuum interrupter 300, and the transmission shaft 100 is in driving connection with the moving contact 2. The closing and opening of the moving contact 2 and the fixed contact 1 are controlled by the transmission connection of the transmission shaft 100 and the moving contact 2. The transmission shaft 100 of the present embodiment may be a spline shaft of a vacuum circuit breaker conventionally used in the prior art, so as to drive the guide rod 4 to move.
The vacuum circuit breaker with the vacuum interrupter 300 can be stably carried and reliably disconnected in a low-frequency alternating current environment with 20Hz and 40.5KV voltage.
Optionally, the vacuum circuit breaker further comprises a spring operating mechanism 200 and a circuit breaker frame 400, wherein the spring operating mechanism 200 is arranged on the circuit breaker frame 400, and the spring operating mechanism 200 is in driving connection with the transmission shaft 100. In view of the fact that in the field of high-voltage vacuum circuit breakers, the existing conventional circuit breaker frame 400 and spring operating mechanism 200 can be selected, the spring operating mechanism 200 is driven by external force, and the motion of the transmission shaft 100 is further realized, the specific structure and the action principle of the spring operating mechanism 200 are not expanded.
It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (10)
1. The vacuum interrupter can be used for a vacuum circuit breaker with the frequency of 20Hz and the voltage of 40.5KV, and is characterized by comprising:
a stationary contact (1);
a moving contact (2), wherein the moving contact (2) can be closed and opened with the fixed contact (1);
the contact surfaces of the moving contact (2) and the fixed contact (1) are circular, and the contact diameters of the moving contact (2) and the fixed contact (1) are not smaller than 98mm and not larger than 108mm; when the moving contact (2) and the fixed contact (1) are connected, the contact pressure range of the moving contact (2) and the fixed contact (1) is 3100N-3500N.
2. Vacuum interrupter according to claim 1, characterized in that the vacuum interrupter further comprises an insulating housing (3), the stationary contact (1) and the moving contact (2) being arranged within the insulating housing (3).
3. Vacuum interrupter according to claim 2, characterized in that the moving contact (2) and the stationary contact (1) are both cup-shaped longitudinal magnetic structures.
4. The vacuum interrupter according to claim 2, wherein one end of the moving contact (2) far away from the fixed contact (1) is connected with a guide rod (4), the guide rod (4) is arranged on the insulating shell (3) in a penetrating way, one end of the guide rod (4) is electrically connected with the moving contact (2), the other end of the guide rod is electrically connected with an external circuit, and the guide rod (4) can drive the moving contact (2) to be closed and opened with the fixed contact (1).
5. Vacuum interrupter according to claim 2, characterized in that a shielding cover (5) is arranged inside the insulating shell (3), and the shielding cover (5) is covered on the peripheries of the moving contact (2) and the static contact (1) at intervals.
6. Vacuum interrupter according to claim 4, characterized in that a seal is provided in the vacuum interrupter, which seal enables a dynamic seal between the guide rod (4) and the insulating housing (3).
7. The vacuum interrupter according to claim 6, wherein the sealing member is a bellows (6), the bellows (6) is sleeved on the guide rod (4), one end of the bellows (6) is connected with the insulating shell (3), and the other end is connected with the outer wall of the guide rod (4).
8. Vacuum interrupter according to one of the claims 2-7, characterized in that the insulating shell (3) is a ceramic shell.
9.40.5KV, comprising a transmission shaft (100), characterized in that it further comprises a vacuum interrupter according to any one of claims 1-8, said transmission shaft (100) being in driving connection with said moving contact (2).
10. The 40.5KV vacuum interrupter of claim 9, further comprising a spring operator (200), the spring operator (200) being drivingly connected to the drive shaft (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321875411.6U CN220290696U (en) | 2023-07-17 | 2023-07-17 | Vacuum interrupter and vacuum circuit breaker of 40.5KV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321875411.6U CN220290696U (en) | 2023-07-17 | 2023-07-17 | Vacuum interrupter and vacuum circuit breaker of 40.5KV |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220290696U true CN220290696U (en) | 2024-01-02 |
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ID=89340011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321875411.6U Active CN220290696U (en) | 2023-07-17 | 2023-07-17 | Vacuum interrupter and vacuum circuit breaker of 40.5KV |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220290696U (en) |
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2023
- 2023-07-17 CN CN202321875411.6U patent/CN220290696U/en active Active
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