CN216980438U - Heat radiation structure of vacuum arc extinguish chamber for large-current circuit breaker - Google Patents
Heat radiation structure of vacuum arc extinguish chamber for large-current circuit breaker Download PDFInfo
- Publication number
- CN216980438U CN216980438U CN202220717617.5U CN202220717617U CN216980438U CN 216980438 U CN216980438 U CN 216980438U CN 202220717617 U CN202220717617 U CN 202220717617U CN 216980438 U CN216980438 U CN 216980438U
- Authority
- CN
- China
- Prior art keywords
- movable side
- guide flange
- movable
- vacuum arc
- heat dissipating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
A heat radiation structure of a vacuum arc extinguish chamber for a large-current circuit breaker comprises a movable side insulating support and the like, wherein one end of an insulating pull rod is positioned outside the movable side insulating support, the other end of the insulating pull rod penetrates through the movable side insulating support, an insulating pull rod guide flange and a movable side conductor to be fixedly connected with a movable conducting rod of the vacuum arc extinguish chamber, the movable side guide flange is inserted into a shell of the vacuum arc extinguish chamber, conducts electricity with the movable conducting rod through a contact, and is used for providing supporting and guiding effects for the movement of the movable conducting rod; a plurality of axial through holes are formed in the movable side guide flange and the insulation pull rod guide flange, and a gas flow channel is formed by the movable side guide flange, the inner cavity of the movable side insulation support and the movable side of the vacuum arc extinguish chamber, so that heat of the movable side guide flange and the inner cavity of the movable side insulation support can be transferred to the outside to dissipate heat; the side of the static side conductor is provided with the through hole, so that the gas inside and outside the static side conductor can be convected to emit heat. The utility model can improve the heat dissipation efficiency of the vacuum arc-extinguishing chamber.
Description
Technical Field
The utility model belongs to the technical field of vacuum arc-extinguishing chambers, and particularly relates to a heat-radiating structure of a vacuum arc-extinguishing chamber for a large-current circuit breaker.
Background
The vacuum arc-extinguishing chamber has the advantages of high insulating strength, no decomposition product when the electric arc is cut off, no aging of medium and the like, and has wide application prospect in environment-friendly gas GIS equipment because the vacuum is used as an insulating and arc-extinguishing medium inside the vacuum arc-extinguishing chamber and SF6 can be used as an insulating medium outside the vacuum arc-extinguishing chamber to replace gas. Because the vacuum can not conduct heat, the heat generated by the vacuum arc extinguish chamber is only transmitted outwards through the contact surfaces of the movable conducting rod and the static side, so that the heat is accumulated on the conductors of the movable side and the static side outside the vacuum arc extinguish chamber, and the temperature of the circuit breaker is overhigh in the operation process.
The vacuum arc-extinguishing chamber is a vacuum sealed container made of ceramic or glass insulating shell and metal component which are sealed together, and its interior pair of contacts are placed under the condition of pressure less than 10-2Pa of high vacuum state. The self heat dissipation capability of the vacuum arc extinguish chamber is extremely poor, and the heat generated by the vacuum arc extinguish chamber is dissipated through the following modes: the heat of the movable side of the vacuum arc extinguish chamber is transferred to the movable end conductor through the conducting rodTo the flange and further to the movable side conductor; the heat of the static side of the vacuum arc extinguish chamber is transferred to the static side supporting conductor through the contact surface; the heat is transferred with the gas in the circuit breaker through the conductors on the movable side and the fixed side, so that the heat dissipation is realized. The heat dissipation channel is single, gas circulation is poor, the heat dissipation effect is poor, a large amount of heat is accumulated on the movable side conductor and the static side conductor outside the vacuum arc extinguish chamber, temperature rise is high in the through-flow process of the circuit breaker, and high rated current is difficult to achieve.
Therefore, the heat dissipation capacity of the vacuum arc extinguish chamber for the circuit breaker is improved, and the key effect on improving the through-current capacity of the circuit breaker is achieved.
Due to the structural limitation of the vacuum arc extinguish chamber, in order to meet 10000 mechanical lives, the rated pressure born by the corrugated pipe is not higher than 0.3 MPa; when the vacuum arc extinguish chamber is applied to a three-phase common-box circuit breaker, in order to meet the insulation performance of the circuit breaker, high-pressure gas needs to be filled into the circuit breaker. Therefore, two different air chambers are arranged in the circuit breaker, the movable conducting rod and the corrugated pipe of the vacuum arc extinguish chamber are located in the low-pressure air chamber, and the vacuum arc extinguish chamber body is located in the high-pressure air chamber. Therefore, the heat dissipation structure of the vacuum arc-extinguishing chamber cannot change the original arrangement of the air chamber.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a heat dissipation structure of a vacuum arc-extinguishing chamber for a high-current circuit breaker, aiming at the defects of the heat dissipation structure of the vacuum arc-extinguishing chamber in the prior art.
The utility model is realized by adopting the following technical scheme:
a heat dissipation structure of a vacuum arc extinguish chamber for a large-current circuit breaker comprises a static side fixing flange, a static side insulating support, a static side conductor, a vacuum arc extinguish chamber, a movable side guide flange, a movable side conductor, an insulating pull rod guide flange and a movable side insulating support which are sequentially connected from bottom to top;
one end of the insulating pull rod is positioned outside the movable side insulating support, the other end of the insulating pull rod penetrates through the movable side insulating support, the insulating pull rod guide flange and the movable side conductor to be fixedly connected with the movable conducting rod of the vacuum arc-extinguishing chamber, and the movable side guide flange is inserted into a shell of the vacuum arc-extinguishing chamber, conducts electricity with the movable conducting rod through a contact and is used for providing supporting and guiding effects for the movement of the movable conducting rod;
a plurality of axial through holes are formed in the movable side guide flange and the insulation pull rod guide flange, and a gas flow channel is formed by the movable side guide flange, the inner cavity of the movable side insulation support and the movable side of the vacuum arc-extinguishing chamber, so that heat of the movable side guide flange and the inner cavity of the movable side insulation support can be transferred to the outside to dissipate heat; the side of the static side conductor is provided with the through hole, so that the gas inside and outside the static side conductor can be convected and heat is dissipated.
The utility model is further improved in that a heat radiation ribbed plate is arranged on the outer cylindrical surface of the movable side guide flange.
The utility model is further improved in that the size of the heat dissipation rib plate is smaller than the maximum outer diameter of the movable side guide flange.
The utility model is further improved in that a heat radiation rib plate is arranged inside the movable side conductor.
A further development of the utility model is that ribs are provided inside the stationary-side conductor.
The utility model is further improved in that a circle of heat dissipation channels are arranged on the bottom surface of the fixed flange at the static side, and the convection of the internal air and the external air can be realized through the heat dissipation channels.
The utility model is further improved in that the heat dissipation channel on the bottom surface of the static side fixing flange is a fan-shaped heat dissipation channel.
The utility model is further improved in that the axial through holes formed in the movable side guide flange correspond to the axial through holes formed in the insulating pull rod guide flange in position and number.
The utility model is further improved in that the movable side guide flange and the shell of the vacuum arc-extinguishing chamber are sealed through a sealing element, and the movable side guide flange, the movable side guide body and the movable side insulating support form a sealed low-pressure air chamber together.
The utility model has at least the following beneficial technical effects:
according to the heat dissipation structure of the vacuum arc extinguish chamber for the large-current circuit breaker, the axial through holes are formed in the guide flange at the moving side and the guide flange of the insulating pull rod, a gas flow channel is formed at the moving side of the vacuum arc extinguish chamber, and heat at the moving side of the vacuum arc extinguish chamber can be dissipated through gas convection; through set up the through-hole and quiet side mounting flange bottom surface sets up heat dissipation channel in quiet side conductor side for vacuum interrupter's quiet side forms gas flow channel, and the heat of the quiet side of vacuum interrupter can give off through gas convection.
Furthermore, the rib plates are arranged inside the movable side conductor and the static side conductor and outside the movable side guide flange, so that the contact area of the conductor and the gas in the circuit breaker is increased, the heat dissipation area is increased, and the heat dissipation efficiency is improved.
In conclusion, the heat dissipation channel is arranged and the heat dissipation area is increased at the same time, so that the heat dissipation efficiency of the vacuum arc-extinguishing chamber is improved, the temperature rise of the vacuum arc-extinguishing chamber in the operation process is reduced, and the rated current of the circuit breaker in operation is improved. According to the scheme, the heat dissipation channel on the movable side of the vacuum arc extinguish chamber is arranged in the axial direction, the state of the air chamber of the original structure is not changed, and the movable conducting rod part of the vacuum arc extinguish chamber can be positioned in the low-voltage closed air chamber, so that the arrangement of the original circuit breaker is not influenced; the radiating rib plate of the scheme is arranged in the movable side conductor and the static side conductor and within the maximum circumferential diameter of the movable end guide flange, and the electric field state of the original structure is not changed.
Drawings
Fig. 1 is a schematic view of a heat dissipation structure of a vacuum interrupter for a high current circuit breaker according to the present invention.
Fig. 2 is a cross-sectional view of fig. 1.
Fig. 3 is a schematic structural view of the movable end guide flange, in which fig. 3(a) is an isometric view and fig. 3(b) is a sectional view.
Fig. 4 is a schematic structural view of the moving-side conductor.
Fig. 5 is a schematic structural view of an insulating tie rod guide flange, wherein fig. 5(a) is a front view and fig. 3(b) is an isometric view.
Fig. 6 is a schematic diagram of a heat dissipation path of the moving side of the vacuum interrupter.
Fig. 7 is a schematic structural view of the stationary-side conductor.
Fig. 8 is a schematic structural view of a stationary-side fixing flange, in which fig. 8(a) is an isometric view and fig. 8(b) is a front view.
Fig. 9 is a schematic diagram of a heat dissipation path on the stationary side of the vacuum interrupter.
The respective symbols in the figure:
1. an insulating pull rod; 2. moving side insulation support; 3. an insulated pull rod guide flange; 4. a moving side conductor; 5. a movable conductive rod; 6. a movable side guide flange; 7. a vacuum arc-extinguishing chamber; 8. a stationary side conductor; 9. a static side insulating support; 10. and a static side fixed flange.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
The utility model provides a heat dissipation structure of a vacuum arc-extinguishing chamber for a large-current circuit breaker, which comprises an insulating pull rod 1, a movable side insulating support 2, an insulating pull rod guide flange 3, a movable side conductor 4, a movable conducting rod 5, a movable side guide flange 6, a vacuum arc-extinguishing chamber 7, a static side conductor 8, a static side insulating support 9 and a static side fixing flange 10.
When the vacuum arc-extinguishing chamber works, under the closing state of the vacuum arc-extinguishing chamber 7, current passes through the movable side conductor 4, the movable side guide flange 6 and the movable conducting rod 5 of the vacuum arc-extinguishing chamber in sequence and reaches the static side conductor 8. The movable side guide flange 6 and the shell of the vacuum arc extinguish chamber 7 are sealed through a sealing piece, and form a sealed low-pressure air chamber together with the movable side conductor 4 and the movable side insulating support 2, so that the insulating pull rod 1, the movable conducting rod 5 and the vacuum arc extinguish chamber corrugated pipe connected with the movable conducting rod 5 are positioned in the low-pressure air chamber, and the pressure requirement of the vacuum arc extinguish chamber corrugated pipe is met. High-pressure environment-friendly gas is filled in the circuit breaker, and the arc extinguish chamber is integrally arranged in the high-pressure gas chamber, so that the insulation requirement of the circuit breaker is met.
The utility model provides a heat dissipation structure of a vacuum arc extinguish chamber for a heavy current circuit breaker, which comprises the following components in part by weight:
scheme 1: the insulating pull rod 1 is fixedly connected with the movable conducting rod 5, the movable conducting rod 5 is driven to move through the movement of the insulating pull rod 1, and then the switching-on and switching-off states of the vacuum arc extinguish chamber 7 are realized. The movable side guide flange 6 is inserted into the shell of the vacuum arc extinguish chamber 7, conducts electricity with the movable conducting rod 5 through a contact, and provides supporting and guiding functions for the movement of the movable conducting rod 5. A part of heat generated by the vacuum interrupter 7 is transferred to the moving-side guide flange 6 through the moving conductive rod 5. According to the utility model, 3 axial through holes are arranged on the movable side guide flange 6, so that gas can circulate, and the heat dissipation efficiency is improved; meanwhile, the heat dissipation rib plates are arranged on the outer cylindrical surface of the movable side guide flange 6, the heat dissipation area of the movable side guide flange 6 is increased, the heat dissipation efficiency is further improved, and the size of each heat dissipation rib plate is smaller than the maximum outer diameter of the movable side guide flange 6, so that the influence on an electric field is avoided. The structure of the moving end guide flange 6 is shown in fig. 3.
Scheme 2: the movable side conductor 4 is tightly connected with the movable side guide flange 6 through bolts, and the heat of the vacuum arc extinguish chamber 7 transferred to the movable side guide flange 6 through the movable conducting rod 5 is transferred to the movable side conductor 4 through a contact surface. According to the utility model, the heat dissipation rib plate is arranged in the movable side conductor 4, so that the heat transfer area between the movable side conductor 4 and the gas in the inner cavity is increased, and the heat dissipation efficiency is improved. The structure of the moving-side conductor 4 is shown in fig. 4.
Scheme 3: the insulating pull rod guide flange 3 is in bolt fastening connection with the movable side conductor 4, and provides guidance and support for the movement of the insulating pull rod 1. According to the utility model, 3 axial through holes are arranged on the insulating pull rod guide flange 3 to form a gas flow channel, so that heat of inner cavities of the movable side conductor 4 and the movable side insulating support 2 can be transferred to the outside for heat dissipation. The structure of the insulated tie-rod guide flange 3 is shown in fig. 5.
Scheme 4: by adopting the above scheme 1, the axial through hole on the movable side guide flange 6 and the scheme 3 insulation pull rod guide flange 3, the inner cavities of the movable side conductor 4 and the movable side insulation support 2, and the movable side of the vacuum arc extinguish chamber 7, a gas flow channel is formed, gas convection is realized, and the heat dissipation efficiency is improved through gas convection. Meanwhile, the movable side insulating support 2 is fastened on a breaker flange, so that the installation requirement that the insulating pull rod 1, the movable conducting rod 5 and a vacuum arc extinguish chamber corrugated pipe connected with the movable conducting rod 5 are positioned in a low-pressure closed air chamber formed by the movable side insulating support 2, the movable side conductor 4 and the movable side guide flange 6 can be ensured. The heat dissipation path of the moving side of the vacuum arc extinguish chamber is schematically shown in figure 6.
Scheme 5: the stationary-side conductor 8 is in contact with the stationary side of the vacuum interrupter 7, and a part of the heat generated by the vacuum interrupter 7 is transferred to the stationary-side conductor 8 through the contact surface and accumulated on the stationary-side conductor 8. The through holes are formed in the side face of the static side conductor 8, so that the air inside and outside the static side conductor 8 can be convected and radiate heat; the rib plate is arranged in the static side conductor 8, so that the contact area of the static side conductor 8 and gas is increased, and the heat dissipation efficiency is improved. The structure of the stationary-side conductor 8 is shown in fig. 7.
Scheme 6: quiet side mounting flange 10 bonds with quiet side insulating support 9 and is in the same place, and quiet side insulating support 9 is in the same place with quiet side conductor 8 bolt-up connection, and quiet side mounting flange 10 passes through bolted connection to be fixed on the circuit breaker bottom cover board, realizes support and fixed action to vacuum interrupter 7. According to the utility model, the bottom surface of the static side fixing flange 10 is provided with a circle of heat dissipation channel, so that internal and external air can realize convection through the heat dissipation channel, and heat is prevented from being accumulated in the static side fixing flange 10. The structure of the stationary-side mounting flange 10 is shown in fig. 8.
Scheme 7: through above-mentioned scheme 4 through-hole and scheme 5 of 8 sides of quiet side conductor the fan-shaped heat dissipation passageway of quiet side mounting flange 10 bottom, the quiet side of vacuum interrupter forms a gas flow path, and the inside high-temperature gas of cavity and outside low-temperature gas form the convection current for the heat gives off, has avoided high-temperature gas to support the inner chamber gathering of conductor 6 and quiet side insulation support 9 at quiet side, has improved the radiating efficiency. The heat dissipation path on the static side of the vacuum arc extinguish chamber is schematically shown in figure 9.
Scheme 8: the heat dissipation rib plates arranged on the movable side conductor 4 and the static side conductor 8 in the scheme 2 are arranged in the conductors, and the heat dissipation rib plates arranged on the outer circumferential surface of the movable side guide flange 6 in the scheme 1 are smaller than the maximum outer diameter of the movable side guide flange 6, so that interference on an electric field in the circuit breaker is avoided.
In summary, the heat dissipation structure of the vacuum interrupter for the high current breaker provided by the utility model comprises a movable side guide flange provided with heat dissipation holes and an external heat dissipation rib plate, a movable side conductor provided with an internal heat dissipation rib plate for heat conduction, a static side support conductor provided with heat dissipation holes on the side surface, and a static side fixing flange provided with heat dissipation holes. The heat conduction efficiency of the movable side supporting conductor and the static side supporting conductor is improved through the heat dissipation rib plates, the gas circulation inside and outside the supporting conductor is improved through the heat dissipation holes, and the heat dissipation efficiency of the arc extinguish chamber is improved. In addition, the original structures and layouts of the arc extinguish chamber and the circuit breaker are not changed, and the states of the electric field and the air chamber are not changed.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. A heat dissipation structure of a vacuum arc extinguish chamber for a large-current circuit breaker is characterized by comprising a static side fixing flange, a static side insulating support, a static side conductor, a vacuum arc extinguish chamber, a movable side guide flange, a movable side conductor, an insulating pull rod guide flange and a movable side insulating support which are sequentially connected from bottom to top;
one end of the insulating pull rod is positioned outside the movable side insulating support, the other end of the insulating pull rod penetrates through the movable side insulating support, the insulating pull rod guide flange and the movable side conductor to be fixedly connected with the movable conducting rod of the vacuum arc-extinguishing chamber, and the movable side guide flange is inserted into a shell of the vacuum arc-extinguishing chamber, conducts electricity with the movable conducting rod through a contact and is used for providing supporting and guiding effects for the movement of the movable conducting rod;
a plurality of axial through holes are formed in the movable side guide flange and the insulation pull rod guide flange, and a gas flow channel is formed by the movable side guide flange, the inner cavity of the movable side insulation support and the movable side of the vacuum arc-extinguishing chamber, so that heat of the movable side guide flange and the inner cavity of the movable side insulation support can be transferred to the outside to dissipate heat; the side of the static side conductor is provided with the through hole, so that the gas inside and outside the static side conductor can be convected and heat is dissipated.
2. A heat dissipating structure of a vacuum interrupter for a large current circuit breaker according to claim 1, wherein a heat dissipating rib is provided on an outer cylindrical surface of the moving side guide flange.
3. The heat dissipating structure of a vacuum interrupter for a high current breaker according to claim 2, wherein the heat dissipating ribs have a size smaller than the maximum outer diameter of the moving side guide flange.
4. A heat dissipating structure of a vacuum interrupter for a large current circuit breaker according to claim 1, wherein a heat dissipating rib is provided inside the moving-side conductor.
5. A heat dissipating structure of a vacuum interrupter for a large current breaker according to claim 1, wherein a rib is provided inside the stationary side conductor.
6. A heat dissipating structure of a vacuum interrupter for a large current breaker according to claim 1, wherein a heat dissipating channel is formed on a bottom surface of the stationary flange, and the inner and outer gases can be convected through the heat dissipating channel.
7. The heat dissipating structure of a vacuum interrupter for a high current breaker according to claim 6, wherein the heat dissipating channel on the bottom surface of the stationary flange is a fan-shaped heat dissipating channel.
8. The heat dissipating structure of a vacuum interrupter for a high current breaker according to claim 1, wherein the axial through holes formed in the moving-side guide flange and the axial through holes formed in the insulating tie guide flange correspond in position and number to each other.
9. The heat dissipating structure of a vacuum interrupter for a high current circuit breaker according to claim 1, wherein the movable side guiding flange is sealed with the housing of the vacuum interrupter by a sealing member, and forms a sealed low voltage air chamber together with the movable side conductor and the movable side insulating support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220717617.5U CN216980438U (en) | 2022-03-30 | 2022-03-30 | Heat radiation structure of vacuum arc extinguish chamber for large-current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220717617.5U CN216980438U (en) | 2022-03-30 | 2022-03-30 | Heat radiation structure of vacuum arc extinguish chamber for large-current circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216980438U true CN216980438U (en) | 2022-07-15 |
Family
ID=82339626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220717617.5U Active CN216980438U (en) | 2022-03-30 | 2022-03-30 | Heat radiation structure of vacuum arc extinguish chamber for large-current circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216980438U (en) |
-
2022
- 2022-03-30 CN CN202220717617.5U patent/CN216980438U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20060102618A1 (en) | High voltage ciruit breaker with cooling | |
| CN101320651A (en) | Heat pipe type vacuum switch | |
| WO2023138257A1 (en) | Insulating cylinder apparatus for vacuum circuit breaker | |
| CN105529663B (en) | Busbar assembly and the Cubicle Gas-Insulated Switchgear using the busbar assembly | |
| CN111627782A (en) | Combination of three-station disconnecting switch and circuit breaker suitable for inflating cabinet | |
| CN114360934A (en) | Ring main unit switch device and ring main unit | |
| CN216980438U (en) | Heat radiation structure of vacuum arc extinguish chamber for large-current circuit breaker | |
| CN208861887U (en) | A kind of vacuum circuit breaker arc-chutes can inhibit bellows heating | |
| CN213070997U (en) | Integrated vacuum circuit breaker for gas insulated switchgear | |
| CN113611550B (en) | Quick mechanical switch for bearing large current | |
| CN215267383U (en) | 12kV/4000A large-current gas-insulated metal-enclosed switchgear | |
| CN216818194U (en) | Circuit breaker structure | |
| CN217719433U (en) | Aerify vacuum circuit breaker utmost point post for cabinet | |
| CN220509906U (en) | Three station switches under integration | |
| CN215266005U (en) | Heat dissipation frame of solid-sealed polar pole | |
| CN217934784U (en) | Inflatable cubical switchboard gas tank with temperature rise solution module device | |
| CN219203926U (en) | Environment-friendly inflatable cabinet air chamber device | |
| CN114203479A (en) | Circuit breaker structure | |
| CN215266066U (en) | Direct-acting double-sleeve isolating switch of large-current gas-insulated metal-enclosed switchgear | |
| CN211628976U (en) | Assembly structure of vacuum arc extinguish chamber and insulating cylinder thereof | |
| CN212461509U (en) | Novel solid-sealed circuit breaker pole | |
| CN219677134U (en) | Main conductive loop of vacuum circuit breaker and vacuum circuit breaker | |
| CN213635825U (en) | Conductive and insulating connection unit on integral high-voltage circuit breaker | |
| RU135446U1 (en) | HIGH VOLTAGE TANK SWITCH WITH VACUUM ARC TAMPER | |
| CN216980434U (en) | High-voltage bistable lateral moving type high-speed vacuum circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |