CN221304528U - Combined corrugated pipe structure for vacuum arc-extinguishing chamber - Google Patents
Combined corrugated pipe structure for vacuum arc-extinguishing chamber Download PDFInfo
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- CN221304528U CN221304528U CN202323260342.0U CN202323260342U CN221304528U CN 221304528 U CN221304528 U CN 221304528U CN 202323260342 U CN202323260342 U CN 202323260342U CN 221304528 U CN221304528 U CN 221304528U
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- corrugated pipe
- bellows
- arc
- extinguishing chamber
- conducting rod
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- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 27
- 230000003068 static effect Effects 0.000 claims abstract description 12
- 239000004020 conductor Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 2
- 239000000919 ceramic Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The utility model discloses a combined corrugated pipe structure for a vacuum arc-extinguishing chamber, and belongs to the technical field of vacuum circuit breakers; the ceramic shell is of a cylindrical structure with two open ends; the two ends of the porcelain shell are respectively connected with a static end cover and a movable end cover; the middle part of the static end cover is provided with a static contact; an arc extinguishing chamber movable conducting rod is arranged in the middle of the movable end cover; a guide sleeve is fixedly connected between the movable conducting rod and the movable end cover of the arc extinguishing chamber; the outer side of the movable conducting rod of the arc extinguish chamber is sleeved with a first corrugated pipe and a second corrugated pipe; the first corrugated pipe is positioned outside the porcelain shell, and two ends of the first corrugated pipe are fixedly connected with the guide sleeve and the arc extinguish chamber movable conducting rod respectively; the second corrugated pipe is positioned inside the porcelain shell, and two ends of the second corrugated pipe are fixedly connected with the guide sleeve and the arc extinguish chamber movable conducting rod respectively. The first corrugated pipe and the assembly mode thereof on the vacuum arc-extinguishing chamber are the same as the original second corrugated pipe in the aspects of design method, production mode and the like, and the process is simple and the cost is low.
Description
Technical Field
The utility model belongs to the technical field of vacuum circuit breakers, and relates to a combined corrugated pipe structure for a vacuum arc-extinguishing chamber.
Background
The vacuum circuit breaker is one of important control and protection equipment in a power system, and is dominant in a 3.6 kV-40.5 kV system, the vacuum arc-extinguishing chamber is a core element of the vacuum circuit breaker and the vacuum load switch, and the environment-friendly arc-extinguishing medium is an outstanding characteristic. The bellows is used as a part with sealing function in the vacuum arc-extinguishing chamber, two ends of the bellows are usually connected with the movable conducting rod and the movable end cover plate respectively, when the vacuum circuit breaker performs opening and closing movement, the bellows moves along with the movable conducting rod and is compressed and restored, the bellows is the only mechanical deformation part needing to be largely reciprocated in the vacuum arc-extinguishing chamber, and the bellows is often the part with the minimum mechanical life in the vacuum arc-extinguishing chamber, so that the life of the bellows generally determines the life of the vacuum arc-extinguishing chamber.
Currently, vacuum interrupters are used at high voltage levels, and the external insulation of the vacuum interrupters is usually achieved by using high-pressure gases, such as sulfur hexafluoride, dry air, etc., with gas pressures up to several atmospheres. The high pressure of the external working environment of the vacuum arc-extinguishing chamber and the high vacuum in the vacuum arc-extinguishing chamber lead the inside and outside sides of the corrugated pipe to have great pressure difference, thereby aggravating the fatigue damage of the corrugated pipe, further leading the vacuum arc-extinguishing chamber to fail and not to work continuously.
In order to solve the problems, the existing vacuum arc-extinguishing chambers with high pressure difference between the inside and the outside are mostly provided with additional structures at the dynamic end of the original vacuum arc-extinguishing chambers, so as to form a structure with gradient difference with the external pressure difference, reduce or eliminate the action of the pressure difference on the corrugated pipe, and maintain the performance and the service life of the corrugated pipe. But has the defects of complex additional structure, large occupied space, high processing difficulty, easy influence on use, high cost and the like.
Disclosure of utility model
The utility model aims to solve the technical problems of complex structure, large occupied space, high processing difficulty and high cost of a corrugated pipe of a vacuum arc-extinguishing chamber in the prior art, and provides a combined corrugated pipe structure for the vacuum arc-extinguishing chamber.
In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:
The utility model provides a combined corrugated pipe structure for a vacuum arc-extinguishing chamber, which comprises a porcelain shell; the porcelain shell is of a cylindrical structure with two open ends; the two ends of the porcelain shell are respectively connected with a static end cover and a movable end cover; the middle part of the static end cover is provided with a static contact; an arc extinguishing chamber movable conducting rod is arranged in the middle of the movable end cover; a guide sleeve is fixedly connected between the movable conducting rod and the movable end cover of the arc extinguishing chamber; the outer side of the movable conducting rod of the arc extinguish chamber is sleeved with a first corrugated pipe and a second corrugated pipe; the first corrugated pipe is positioned outside the porcelain shell, and two ends of the first corrugated pipe are fixedly connected with the guide sleeve and the arc extinguish chamber movable conducting rod respectively; the second corrugated pipe is positioned inside the porcelain shell, and two ends of the second corrugated pipe are fixedly connected with the guide sleeve and the arc extinguish chamber movable conducting rod respectively.
Further, a shielding cover is arranged inside the porcelain shell; the shielding cover surrounds the fixed contact and the arc extinguishing chamber movable conducting rod.
Further, a gap is reserved between the guide sleeve and the arc extinguish chamber movable conducting rod so as to communicate the second corrugated pipe inner space and the first corrugated pipe inner space.
Further, the guide sleeve is a metal guide sleeve or a nonmetal guide sleeve.
Further, the vacuum degree of the first corrugated pipe inner space and the second corrugated pipe inner space is smaller than or equal to the vacuum degree of the arc extinguishing chamber inner space.
Further, the air pressure value of the first corrugated pipe inner space and the second corrugated pipe inner space is smaller than the air pressure value of the porcelain shell outer space.
Further, the setting direction of the first corrugated pipe is the same as or opposite to the setting direction of the second corrugated pipe.
Further, the first corrugated pipe is formed by overlapping a plurality of layers of corrugated pipes.
Compared with the prior art, the utility model has the following beneficial effects:
The utility model discloses a combined corrugated pipe structure for a vacuum arc-extinguishing chamber, wherein a second corrugated pipe and a first corrugated pipe are in redundancy backup, and when any corrugated pipe is out of sealing performance due to problems, the vacuum degree of the internal space of the vacuum arc-extinguishing chamber can be ensured until all the corrugated pipes are out of sealing performance. Thereby improving the sealing performance of the vacuum arc extinguishing chamber. The first corrugated pipe inner space and the second corrugated pipe inner space can be set to be the same vacuum degree as the inner space of the arc extinguishing chamber, and can also be set to be a barometric value which is lower than the vacuum degree of the inner space of the vacuum arc extinguishing chamber but is smaller than the air pressure of the outer space, so that the pressure difference among the inner space of the vacuum arc extinguishing chamber, the inner space of the second corrugated pipe, the inner space of the first corrugated pipe and the outer space of the first corrugated pipe forms a gradient, the working stress of the second corrugated pipe and the working stress of the first corrugated pipe are reduced, and the reliability and the mechanical life of the airtight performance of the vacuum arc extinguishing chamber are improved. In addition, the first corrugated pipe and the assembly mode thereof on the vacuum arc-extinguishing chamber are the same as the original second corrugated pipe in the aspects of design method, production mode and the like, other process steps are not added, the manufacturing difficulty of a vacuum arc-extinguishing chamber manufacturing enterprise is reduced, and the production in the original production mode can be facilitated.
Drawings
For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a cross-sectional view taken in the A-A direction of the present utility model;
Fig. 3 is an enlarged view of the portion B of the present utility model.
Wherein: 101-a fixed contact; 102-a static end cover; 103-porcelain shell; 104-a movable end cover; 105-a guide sleeve; 106-a first bellows; 107-arc extinguishing chamber movable conducting rod; 201-a shield; 202-a second bellows; 300-arc extinguishing chamber inner space; 301-a second bellows interior space; 302-first bellows interior space.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present utility model, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The utility model is described in further detail below with reference to the attached drawing figures:
Referring to fig. 1 and 2, the utility model discloses a combined corrugated pipe structure for a vacuum arc-extinguishing chamber, which comprises a porcelain shell 103; the porcelain shell 103 is a cylinder or similar structure with two open ends; the two ends of the porcelain shell 103 are respectively connected with a static end cover 102 and a movable end cover 104; the middle part of the static end cover 102 is provided with a static contact 101; an arc extinguishing chamber movable conducting rod 107 is arranged in the middle of the movable end cover 104; a guide sleeve 105 is fixedly connected between the arc extinguish chamber movable conducting rod 107 and the movable end cover 104; the first corrugated pipe 106 and the second corrugated pipe 202 are sleeved outside the arc extinguishing chamber movable conducting rod 107; the first corrugated pipe 106 is positioned outside the porcelain shell 103, and two ends of the first corrugated pipe 106 are fixedly connected with the guide sleeve 105 and the arc extinguishing chamber movable conducting rod 107 respectively; the second corrugated pipe 202 is located inside the porcelain shell 103, and two ends of the second corrugated pipe 202 are fixedly connected with the guide sleeve 105 and the arc extinguishing chamber movable conducting rod 107 respectively.
In a possible embodiment of the present utility model, a shielding case 201 is further connected to the inside of the porcelain shell 103; the shielding case 201 is cylindrical, and the shielding case 201 is arranged around the fixed contact 101 and the arc extinguishing chamber movable conducting rod 107.
Referring to fig. 3, in one possible embodiment of the present utility model, a gap is left between the guide sleeve 105 and the arc chute movable conductive rod 107 to communicate the second bellows inner space 301 with the first bellows inner space 302.
In one possible embodiment of the present utility model, the guide sleeve 105 is a metal guide sleeve or a non-metal guide sleeve.
In one possible embodiment of the present utility model, the guide sleeve 105, the arc-extinguishing chamber movable conductive rod 107, the second bellows 202, the movable end cover 104, the porcelain shell 103, and the stationary end cover 102 together form a vacuum arc-extinguishing chamber internal space 300, and the arc-extinguishing chamber internal space 300 is in a vacuum state required for working. The arc extinguishing chamber movable conducting rod 107, the second corrugated pipe 202 and the guide sleeve 105 form a second corrugated pipe inner space 301; the arc extinguishing chamber movable conducting rod 107, the first corrugated pipe 106 and the guide sleeve 105 form a first corrugated pipe inner space 302; the vacuum degree of the first bellows inner space 302 and the second bellows inner space 301 is less than or equal to the vacuum degree of the arc extinguishing chamber inner space 300.
In one possible embodiment of the present utility model, the air pressure value of the first bellows inner space 302 and the second bellows inner space 301 is smaller than the air pressure value of the outer space of the porcelain shell 103.
In a possible embodiment of the present utility model, the first bellows 106 is disposed in the same or opposite direction as the second bellows 202.
In one possible embodiment of the present utility model, the first bellows 106 is formed by stacking a plurality of bellows.
In a possible embodiment of the present utility model, the porcelain shell 103 is respectively connected to the static end cover 102 and the movable end cover 104 by welding.
The working principle of the utility model is as follows:
When the vacuum circuit breaker performs an opening and closing operation, the second bellows 202 is compressed or restored, and performs a sealing function, isolating the vacuum interrupter interior space 300 from the external environment. The first bellows 106 is compressed or restored in synchronization with the arc chute moving conductive rod 107 and the second bellows 202, and the first bellows 106 isolates the second bellows inner space 301 and the first bellows inner space 302 from the outer space and becomes a buffer space between the outer space and the vacuum arc chute inner space 300.
When the external space is a normal natural atmospheric pressure, the second bellows internal space 301 and the first bellows internal space 302 may be set to the same vacuum degree as the vacuum interrupter internal space 300. It may be set to a pressure value lower than the vacuum degree of the vacuum interrupter inner space 300 but lower than the air pressure of the outer space, so that the outer space and the vacuum interrupter inner space 300 constitute a pressure gradient difference.
When the external space is several atmospheric pressures, the second bellows internal space 301 and the first bellows internal space 302 may be set to a pressure value lower than the vacuum degree of the vacuum interrupter internal space 300 but lower than the gas pressure of the external space, for example, to a half pressure value of the external space, so that the external space and the vacuum interrupter internal space 300 constitute a pressure gradient difference.
The second bellows 202 of the present utility model may be fixed to the movable end cover 104 or the guide sleeve 105, in addition to one end fixed to the movable conductive rod 107. The corrugated pipe combination structure is suitable for not only normal working conditions of the vacuum arc-extinguishing chamber, but also working conditions of the vacuum arc-extinguishing chamber under high gas pressure, and adopts a mode of redundancy, redundancy and pressure gradient to improve the airtight performance of the vacuum arc-extinguishing chamber and the tolerance capability of the vacuum arc-extinguishing chamber under high gas pressure, so that the application range of the vacuum arc-extinguishing chamber is widened.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (8)
1. A combined bellows structure for a vacuum interrupter, characterized by comprising a porcelain shell (103); the porcelain shell (103) is of a cylinder structure with two open ends; both ends of the porcelain shell (103) are respectively connected with a static end cover (102) and a movable end cover (104); a fixed contact (101) is arranged in the middle of the fixed end cover (102); an arc extinguishing chamber movable conducting rod (107) is arranged in the middle of the movable end cover (104); a guide sleeve (105) is fixedly connected between the arc-extinguishing chamber movable conducting rod (107) and the movable end cover (104); the outer side of the arc extinguish chamber movable conducting rod (107) is sleeved with a first corrugated pipe (106) and a second corrugated pipe (202); the first corrugated pipe (106) is positioned outside the porcelain shell (103), and two ends of the first corrugated pipe (106) are fixedly connected with the guide sleeve (105) and the arc-extinguishing chamber movable conducting rod (107) respectively; the second corrugated pipe (202) is positioned inside the porcelain shell (103), and two ends of the second corrugated pipe (202) are fixedly connected with the guide sleeve (105) and the arc-extinguishing chamber movable conducting rod (107) respectively.
2. The combined corrugated pipe structure for the vacuum interrupter according to claim 1, wherein a shielding case (201) is further provided inside the porcelain shell (103); the shielding cover (201) is arranged around the fixed contact (101) and the arc extinguishing chamber movable conducting rod (107).
3. A combined bellows structure for a vacuum interrupter according to claim 1, wherein a gap is left between the guide sleeve (105) and the interrupter moving conductor rod (107) to communicate the second bellows interior space (301) with the first bellows interior space (302).
4. A modular bellows structure for vacuum interrupters as claimed in claim 3, characterized in that the guiding sleeve (105) is a metallic guiding sleeve or a non-metallic guiding sleeve.
5. The combination bellows structure for a vacuum interrupter of claim 4, wherein the vacuum degree of the first bellows inner space (302) and the second bellows inner space (301) is less than or equal to the vacuum degree of the interrupter inner space (300).
6. A combined bellows structure for a vacuum interrupter according to claim 5, wherein the air pressure value of the first bellows inner space (302) and the second bellows inner space (301) is smaller than the air pressure value of the outer space of the porcelain shell (103).
7. A combined bellows structure for a vacuum interrupter according to claim 6, characterized in that the first bellows (106) is arranged in the same or opposite direction as the second bellows (202).
8. A combined bellows structure for a vacuum interrupter according to claim 7, wherein the first bellows (106) is a stack of several layers of bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323260342.0U CN221304528U (en) | 2023-11-30 | 2023-11-30 | Combined corrugated pipe structure for vacuum arc-extinguishing chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323260342.0U CN221304528U (en) | 2023-11-30 | 2023-11-30 | Combined corrugated pipe structure for vacuum arc-extinguishing chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221304528U true CN221304528U (en) | 2024-07-09 |
Family
ID=91749732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323260342.0U Active CN221304528U (en) | 2023-11-30 | 2023-11-30 | Combined corrugated pipe structure for vacuum arc-extinguishing chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221304528U (en) |
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2023
- 2023-11-30 CN CN202323260342.0U patent/CN221304528U/en active Active
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| GR01 | Patent grant |