CN219040337U - Conductive structure of vacuum arc-extinguishing chamber - Google Patents
Conductive structure of vacuum arc-extinguishing chamber Download PDFInfo
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- CN219040337U CN219040337U CN202320121471.2U CN202320121471U CN219040337U CN 219040337 U CN219040337 U CN 219040337U CN 202320121471 U CN202320121471 U CN 202320121471U CN 219040337 U CN219040337 U CN 219040337U
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Abstract
The utility model discloses a vacuum arc-extinguishing chamber conductive structure, which belongs to the field of medium-high voltage vacuum switches, wherein a high-strength metal hollow pipe is respectively added at the central parts of a static conductive rod and a movable conductive rod, the outer surface of the metal hollow pipe is welded with the static conductive rod or the movable conductive rod, one end of the metal hollow pipe is welded with an electrode, the other end of the metal hollow pipe extends to the outside of the vacuum arc-extinguishing chamber, and the heat dissipation capacity of the vacuum arc-extinguishing chamber is enhanced to bear higher rated current without exceeding the limit of temperature rise requirements; the mechanical strength of the vacuum arc-extinguishing chamber is improved to withstand the faster switching-on and switching-off speed without deformation exceeding the use requirement, the heat dissipation performance and the mechanical strength of the vacuum arc-extinguishing chamber are obviously improved, and the vacuum arc-extinguishing chamber is suitable for use occasions with high current and high switching-on and switching-off speed, such as phase-selection switching-off vacuum circuit breakers and generator outlet vacuum circuit breakers.
Description
Technical Field
The utility model belongs to the field of medium-high voltage vacuum switches, and particularly relates to a vacuum arc-extinguishing chamber conductive structure.
Background
The vacuum arc-extinguishing chamber, also called vacuum switch tube, is a core component of a medium-high voltage power switch, and has the main functions of enabling the medium-high voltage power switch to quickly extinguish arc and inhibit current after the power supply is cut off through the excellent insulativity of vacuum in the tube, so as to avoid accidents and accidents. The insulating material has the characteristics of high insulating property, strong breaking capacity, long service life, no maintenance, environmental friendliness and the like.
As the power load increases, the rated current of the power system increases rapidly. The phase selection switching is one of effective measures for improving the switching-on and switching-off of the capacitive current, and in order to realize the accurate phase selection switching-on and switching-off, the vacuum arc-extinguishing chamber needs to operate at a higher switching-on and switching-off speed, the mechanical strength of the vacuum arc-extinguishing chamber is used, the high switching-on and switching-off speed requires that the movable and static conductive rods caused by the high switching-on and switching-off speed deform and are damaged, and meanwhile, the high rated current enables the temperature rise to be abnormal in the operation process of the circuit breaker and the heating to be serious.
Disclosure of Invention
The utility model provides a vacuum arc-extinguishing chamber conductive structure which can enhance the heat dissipation capacity of the vacuum arc-extinguishing chamber to bear higher rated current without exceeding the limit of temperature rise requirement; the mechanical strength of the vacuum arc-extinguishing chamber is improved to withstand the faster switching-on and switching-off speed without deformation exceeding the use requirement, the heat dissipation performance and the mechanical strength of the vacuum arc-extinguishing chamber are obviously improved, and the vacuum arc-extinguishing chamber is suitable for use occasions with high current and high switching-on and switching-off speed, such as phase-selection switching-off vacuum circuit breakers and generator outlet vacuum circuit breakers.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a vacuum arc-extinguishing chamber conductive structure comprises a static end metal hollow tube, a static conductive rod, a static end electrode, a movable conductive rod, a movable end metal hollow tube and a movable end electrode;
a through hole is formed along the center of the static conductive rod shaft, a static end metal hollow pipe is arranged in the through hole of the static conductive rod in a penetrating way, one end of the static end metal hollow pipe is connected with a static end electrode, and the other end of the static end metal hollow pipe and the static conductive rod extend to the outside of the vacuum arc extinguishing chamber together;
and a through hole is formed in the center of the movable conducting rod, a movable end metal hollow pipe is arranged in the through hole of the movable conducting rod in a penetrating mode, one end of the movable end metal hollow pipe is connected with the movable end electrode, and the other end of the movable end metal hollow pipe and the movable conducting rod extend to the outside of the vacuum arc-extinguishing chamber together.
Preferably, the diameter of the through hole of the static conductive rod is larger than or equal to the outer diameter of the static end metal hollow tube.
Preferably, the diameter of the through hole of the movable conducting rod is larger than or equal to the outer diameter of the movable end metal hollow tube.
Preferably, the outer surface of the static end metal hollow tube is welded with the inner wall of the through hole of the static conductive rod.
Preferably, the outer surface of the movable end metal hollow tube is welded with the inner wall of the through hole of the movable conducting rod.
Preferably, the static end metal hollow tube and the movable end metal hollow tube are made of 316 stainless steel.
Preferably, the conductivity of the static conductive rod and the dynamic conductive rod is greater than or equal to 50MS/m.
Preferably, the stationary end metal hollow tube is welded with the stationary end electrode.
Preferably, the movable end metal hollow tube is welded with the movable end electrode.
Preferably, the device further comprises a static end cover plate, a movable end cover plate and a shell, wherein the shell is of a cylindrical structure, and the static end cover plate and the movable end cover plate are respectively arranged on two sides of the shell.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model discloses a vacuum arc-extinguishing chamber conductive structure, wherein a through hole is arranged along the center of a static conductive rod shaft, a static end metal hollow pipe is arranged in the through hole of the static conductive rod in a penetrating way, a through hole is arranged along the center of the shaft of a movable conductive rod, a movable end metal hollow pipe is arranged in the through hole of the movable conductive rod in a penetrating way, due to skin effect, the current density of the central part is small when the static conductive rod and the movable conductive rod are subjected to, the influence of the current carrying capacity of the static conductive rod and the movable conductive rod caused by the increase of the through hole at the position is small, the heat dissipation efficiency of the vacuum arc-extinguishing chamber can be enhanced, the higher rated current can be borne without exceeding the limit of the temperature rise requirement, meanwhile, the heat generated by a contact gap can be quickly transmitted to the outside of the vacuum arc-extinguishing chamber through the air flow flowing in the metal hollow pipe, the vacuum arc-extinguishing chamber has strong heat dissipation performance, the service life of the vacuum arc-extinguishing chamber is prolonged, and the structure improvement is simple and easy to realize.
Further, the static conductive rod and the movable conductive rod are made of materials with high conductivity, and the static end metal hollow pipe and the movable end metal hollow pipe are made of 316 stainless steel and have high mechanical strength so as to resist the faster switching-on and switching-off speed and not to deform beyond the use requirement.
Drawings
Fig. 1 is a schematic diagram of a conductive structure of a vacuum interrupter according to the present utility model.
In the figure: 1. a stationary end metal hollow tube; 2. a static conductive rod; 3. a stationary end cover plate; 4. a stationary electrode; 5. a movable conductive rod; 6. a movable end metal hollow tube; 7. a movable end cover plate; 8. a movable terminal electrode; 9. a housing.
Detailed Description
Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
The utility model will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the utility model.
The utility model also provides a vacuum arc-extinguishing chamber conductive structure, referring to fig. 1, comprising a static end metal hollow tube 1, a static conductive rod 2, a static end electrode 4, a movable conductive rod 5, a movable end metal hollow tube 6 and a movable end electrode 8;
a through hole is formed along the center of the shaft of the static conductive rod 2, a static end metal hollow pipe 1 is arranged in the through hole of the static conductive rod 2 in a penetrating way, one end of the static end metal hollow pipe 1 is connected with a static end electrode 4, and the other end of the static end metal hollow pipe and the static conductive rod 2 extend to the outside of the vacuum arc extinguishing chamber together;
a through hole is formed in the center of the shaft of the movable conducting rod 5, a movable end metal hollow pipe 6 is arranged in the through hole of the movable conducting rod 5 in a penetrating mode, one end of the movable end metal hollow pipe 6 is connected with a movable end electrode 8, and the other end of the movable end metal hollow pipe and the movable conducting rod 5 extend to the outside of the vacuum arc-extinguishing chamber together.
Because of the skin effect, the current density of the central part is very small when the static conductive rod 2 and the movable conductive rod 5 are arranged, and the effect of increasing the through holes at the position on the current carrying capacity of the static conductive rod 2 and the movable conductive rod 5 is very small, so that the heat dissipation performance and the mechanical strength of the vacuum arc extinguishing chamber are remarkably improved, and the vacuum arc extinguishing chamber is suitable for use occasions with high current and high opening and closing speed, such as phase-selecting open-close vacuum circuit breakers and generator outlet vacuum circuit breakers.
In the embodiment of the utility model, referring to fig. 1, the diameter of the through hole of the static conductive rod 2 is larger than or equal to the outer diameter of the static end metal hollow tube 1, so that loosening is avoided, falling is prevented, the safety of the vacuum arc extinguishing chamber in working is ensured, the production cost is low, and the popularization is convenient.
In the embodiment of the present utility model, referring to fig. 1, the diameter of the through hole of the movable conductive rod 5 is greater than or equal to the outer diameter of the movable end metal hollow tube 6, so that the movable conductive rod 5 and the movable end metal hollow tube 6 are tightly connected, and the design is reasonable and the sealing effect is good.
In the embodiment of the utility model, referring to fig. 1, the outer surface of the static end metal hollow tube 1 is welded with the inner wall of the through hole of the static conductive rod 2, and the high-strength static end metal hollow tube 1 is welded in the through hole in the central part of the static conductive rod 2, so that the mechanical strength of the vacuum arc-extinguishing chamber can be increased, and the working efficiency of the vacuum arc-extinguishing chamber can be improved.
In the embodiment of the present utility model, referring to fig. 1, the outer surface of the movable end metal hollow tube 6 is welded to the inner wall of the through hole of the movable conductive rod 5. The high-strength movable end metal hollow tube 6 is welded in the through hole in the center of the movable conducting rod 5, so that the strength of the movable conducting rod 5 is improved, deformation and damage in the working process are avoided, and the vacuum arc extinguishing chamber runs stably for a long time.
In an embodiment of the present utility model, referring to fig. 1, the stationary end metal hollow tube 1 and the movable end metal hollow tube 6 are made of 316 stainless steel, and the 316 stainless steel has a tensile strength (Mpa) of 620MIN, a yield strength (Mpa) of 310MIN, and an elongation (%) of 30MIN. Materials with values above 316 stainless steel can be selected, so that the mechanical strength of the vacuum arc-extinguishing chamber is enhanced, the rapid switching-on and switching-off speed is tolerated without deformation exceeding the use requirement, and the working effective time of the equipment is prolonged.
In an embodiment of the present utility model, referring to fig. 1, the conductivity of the static conductive rod 2 and the dynamic conductive rod 5 is greater than or equal to 50MS/m. Can use oxygen-free copper or a material with conductivity above the oxygen-free copper, avoid being damaged by high current in the working process of the vacuum arc-extinguishing chamber, and has stability and safe and reliable operation.
In the embodiment of the present utility model, referring to fig. 1, a stationary metal hollow tube 1 is welded with a stationary electrode 4. When current flows through the vacuum interrupter, the main heat in the vacuum interrupter is generated due to the contact resistance between the two electrodes, i.e. the heat source is near the contact surface of the movable electrode 8 and the stationary electrode 4. The static end metal hollow tube 1 penetrating the static conductive rod 2 connects the electrode with the external environment, so that heat generated near the contact surface of the static end electrode 4 can be transmitted to the outside through the air flow flowing in the static end metal hollow tube 1 rapidly, and the heat dissipation capacity of the vacuum arc extinguishing chamber is greatly increased.
In an embodiment of the present utility model, referring to fig. 1, a moving end metal hollow tube 6 is welded with a moving end electrode 8. Heat generated near the contact surface of the movable terminal electrode 8 is transmitted to the outside through the movable terminal metal hollow tube 6, thereby improving the heat dissipation efficiency of the vacuum interrupter in a high-voltage and high-current working environment.
In the embodiment of the utility model, referring to fig. 1, the vacuum arc extinguishing chamber further comprises a static end cover plate 3, a movable end cover plate 7 and a shell 9, wherein the shell 9 is of a cylindrical structure, the static end cover plate 3 and the movable end cover plate 7 are respectively arranged on two sides of the shell 9 to encapsulate internal parts, so that the vacuum arc extinguishing chamber is favorable for adsorbing vapor generated during working, the influence of the vapor on the heat dissipation performance of the vacuum arc extinguishing chamber can be reduced, and the vacuum arc extinguishing chamber has a simple structure and strong practicability.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The vacuum arc-extinguishing chamber conductive structure is characterized by comprising a static end metal hollow tube (1), a static conductive rod (2), a static end electrode (4), a movable conductive rod (5), a movable end metal hollow tube (6) and a movable end electrode (8);
a through hole is formed along the shaft center of the static conductive rod (2), a static end metal hollow pipe (1) is arranged in the through hole of the static conductive rod (2) in a penetrating mode, one end of the static end metal hollow pipe (1) is connected with a static end electrode (4), and the other end of the static end metal hollow pipe and the static conductive rod (2) extend to the outside of the vacuum arc extinguishing chamber together;
a through hole is formed in the center of the shaft of the movable conducting rod (5), a movable end metal hollow tube (6) is arranged in the through hole of the movable conducting rod (5) in a penetrating mode, one end of the movable end metal hollow tube (6) is connected with a movable end electrode (8), and the other end of the movable end metal hollow tube and the movable conducting rod (5) extend to the outside of the vacuum arc-extinguishing chamber together.
2. The vacuum interrupter conducting structure according to claim 1, wherein the diameter of the through hole of the static conducting rod (2) is larger than or equal to the outer diameter of the static end metal hollow tube (1).
3. The vacuum interrupter conducting structure according to claim 1, wherein the diameter of the through hole of the movable conducting rod (5) is larger than or equal to the outer diameter of the movable end metal hollow tube (6).
4. The vacuum interrupter conductive structure of claim 1, wherein the outer surface of the stationary metal hollow tube (1) is welded to the inner wall of the through hole of the stationary conductive rod (2).
5. A vacuum interrupter conductive structure according to claim 1, wherein the outer surface of the moving end metal hollow tube (6) is welded with the inner wall of the through hole of the moving conductive rod (5).
6. A vacuum interrupter conductive structure according to claim 1, wherein the stationary (1) and moving (6) metal hollow tubes are 316 stainless steel.
7. A vacuum interrupter conductive structure according to claim 1, wherein the conductivity of the static conductive rod (2) and the dynamic conductive rod (5) is 50MS/m or more.
8. A vacuum interrupter conductive structure according to claim 1, wherein the stationary metal hollow tube (1) is welded with the stationary electrode (4).
9. A vacuum interrupter conductive structure according to claim 1, wherein the moving end metal hollow tube (6) is welded with the moving end electrode (8).
10. The vacuum interrupter conductive structure of claim 1, further comprising a stationary end cover plate (3), a moving end cover plate (7) and a housing (9), wherein the housing (9) is a cylindrical structure, and the stationary end cover plate (3) and the moving end cover plate (7) are respectively disposed on two sides of the housing (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320121471.2U CN219040337U (en) | 2023-01-30 | 2023-01-30 | Conductive structure of vacuum arc-extinguishing chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320121471.2U CN219040337U (en) | 2023-01-30 | 2023-01-30 | Conductive structure of vacuum arc-extinguishing chamber |
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| Publication Number | Publication Date |
|---|---|
| CN219040337U true CN219040337U (en) | 2023-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320121471.2U Active CN219040337U (en) | 2023-01-30 | 2023-01-30 | Conductive structure of vacuum arc-extinguishing chamber |
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| Country | Link |
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| CN (1) | CN219040337U (en) |
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2023
- 2023-01-30 CN CN202320121471.2U patent/CN219040337U/en active Active
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