CN112053897B - Layered high-voltage vacuum switch tube - Google Patents
Layered high-voltage vacuum switch tube Download PDFInfo
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- CN112053897B CN112053897B CN202010982020.9A CN202010982020A CN112053897B CN 112053897 B CN112053897 B CN 112053897B CN 202010982020 A CN202010982020 A CN 202010982020A CN 112053897 B CN112053897 B CN 112053897B
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- vacuum
- contact rod
- movable contact
- cover
- fixed
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
- H01H2033/66223—Details relating to the sealing of vacuum switch housings
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention discloses a layered high-voltage vacuum switch tube, and relates to the technical field of vacuum switch tubes. The invention includes a vacuum lamination hood; the movable contact rod penetrates through one side of the vacuum layering cover, the movable contact rod is in sliding fit with the vacuum layering cover, and a sliding sealing ring is arranged between the movable contact rod and the vacuum layering cover; the static contact rod penetrates through and is fixed on the other side of the vacuum layering cover; the vacuum layering cover comprises at least one layer of vacuum tube; the internal vacuum degrees of a plurality of layers of vacuum tubes in the vacuum layering cover are gradually increased from the inner layer to the outer layer. Through the action of the vacuum layering cover, under the same condition that the range of the internal and external pressure difference values of the existing sealing element is limited, the vacuum degree of the movable contact rod and the static contact rod in the high-pressure vacuum switch tube can be improved in a multi-layer vacuum tube mode, namely the vacuum degree in the high-pressure vacuum switch tube reaches a relatively smaller degree, so that the advantage of better insulation effect is achieved.
Description
Technical Field
The invention belongs to the technical field of vacuum switch tubes, and particularly relates to a layered high-voltage vacuum switch tube.
Background
The vacuum switch tube is also called a vacuum arc extinguish chamber, is an essential core component on a vacuum circuit breaker, is particularly applied to a high-voltage circuit, utilizes high vacuum as an insulating medium, can rapidly extinguish arc and inhibit current after the high-voltage circuit cuts off a power supply, avoids accidents and accidents, and therefore needs to achieve high insulating strength.
The existing vacuum switch tube cannot reach an absolutely ideal vacuum state, namely the vacuum switch tube is in a relatively vacuum state; the insulation effect in a high vacuum state is better than that in a low vacuum state; therefore, the higher the vacuum degree in the vacuum switch tube, the better the insulation effect.
Due to the technical limitation at present, namely the range of the internal and external pressure difference value of the sealing element is limited, the problems of poor vacuum sealing effect and relatively poor insulation effect exist; or if a sealing member with a high internal and external pressure difference value is to be achieved, the required quality is high, thereby causing the problem of high product cost.
Disclosure of Invention
The invention aims to provide a layered high-pressure vacuum switch tube, which can improve the vacuum degree of a movable contact rod and a static contact rod in the high-pressure vacuum switch tube in a multilayer vacuum tube mode under the same condition that the range of the internal and external pressure difference values of the current sealing element is limited by the action of a vacuum layered cover, namely, the vacuum degree in the high-pressure vacuum switch tube reaches a relatively smaller degree, thereby achieving the advantage of better insulation effect; and the more vacuum tubes in the vacuum layering cover, namely the more layers, the smaller the pressure difference between the inside and the outside of each vacuum tube, so that the quality requirement on the sliding sealing ring is relatively lower, and the product cost is reduced.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a layered high-voltage vacuum switch tube, which comprises a vacuum layered cover, an insulating shell, a shielding cover, a movable contact rod and a static contact rod, wherein the insulating shell is arranged on the vacuum layered cover; a shielding cover is fixed in the insulating shell; an end enclosure A and an end enclosure B are respectively fixed at two ends of the insulating shell; the movable contact rod penetrates through and is in sliding fit with the seal head A, and a corrugated pipe is fixed between the peripheral side surface of the movable contact rod and the inner wall of the seal head A; the static contact rod penetrates through and is fixed in the seal head B; a moving contact is fixed on the moving contact rod, and a static contact is fixed on the static contact rod; the movable contact rod penetrates through one side of the vacuum layering cover, the movable contact rod is in sliding fit with the vacuum layering cover, and a sliding sealing ring is arranged between the movable contact rod and the vacuum layering cover; the static contact rod penetrates through and is fixed on the other side of the vacuum layering cover; the vacuum layered cover comprises at least one layer of vacuum tube; the internal vacuum degrees of a plurality of layers of vacuum tubes in the vacuum layering cover are gradually increased from the inner layer to the outer layer; the sliding sealing ring on the vacuum tube can bear higher working pressure, so that the interior of the vacuum tube at the innermost layer in the vacuum layering cover is set to be in the highest vacuum state, such as a high vacuum state or even an ultrahigh vacuum state; the other vacuum tubes can be gradually reduced from the inner layer to the outer layer to be in a low vacuum or rough vacuum state; the more the layer number is, the smaller the pressure difference between the inside and the outside of each vacuum tube is, so that the requirement on the quality of the sliding sealing ring is relatively low; specifically, the materials are selected according to the comprehensive consideration of the cost of the number of vacuum tubes, the cost of the lowest quality of the sliding sealing ring and other factors.
Wherein, the higher the vacuum state in the vacuum tube of the innermost layer in the vacuum separation layer cover, the higher the insulating property is, thereby achieving the advantage of improving the insulating effect.
The sliding sealing ring is an O-shaped rubber ring sealing ring, which is called an O-shaped ring for short and is a rubber ring with a circular cross section. The O-shaped sealing ring is the most widely used sealing element in hydraulic and pneumatic systems; the O-shaped ring has good sealing performance, and can be used for static sealing and dynamic sealing; not only can be used independently, but also is an essential component in many combined sealing devices; it has wide application range, and can meet the requirements of various media and various motion conditions if the material is properly selected.
Furthermore, through holes are formed in one side of each of the vacuum tubes in the vacuum layering cover; through holes of the vacuum tubes in the layers are fixedly connected with sliding sealing rings; the sliding seal ring is connected with the movable contact rod in a sliding manner; the sliding sealing ring adopts an O-shaped ring for gas sealing, namely, a plurality of layers of vacuum tubes are used, and each layer of vacuum tube bears relatively small pressure difference, so that the innermost layer of the vacuum layering cover and the environment outside the vacuum switch tube form large pressure difference; the vacuum layered cover is characterized in that a sealing element with relatively low quality requirement is adopted, so that the vacuum state of the vacuum tube in the vacuum layered cover is gradually improved, and the vacuum tube in the innermost layer of the vacuum layered cover is in a relatively high vacuum state.
Furthermore, the air pressure difference value between the inside and the outside of the vacuum tubes of the layers is 0.01MPa-0.05MPa.
Furthermore, the movable contact rods are provided with limit columns for limiting the movable range of the movable contact rods; the movable contact rod and the limiting column are of an integrated structure.
Furthermore, a plurality of limiting rings matched with the vacuum tubes are arranged on the peripheral side face of the static contact rod.
The invention has the following beneficial effects:
1. through the action of the vacuum layering cover, under the same condition that the range of the internal and external pressure difference values of the existing sealing element is limited, the vacuum degree of the movable contact rod and the static contact rod in the high-pressure vacuum switch tube can be improved in a multi-layer vacuum tube mode, namely the vacuum degree in the high-pressure vacuum switch tube reaches a relatively smaller degree, so that the advantage of better insulation effect is achieved.
2. The vacuum tube can bear higher working pressure through the sliding sealing ring on the vacuum tube, so that the interior of the vacuum tube at the innermost layer in the vacuum layering cover is set to be in the highest vacuum state, such as a high vacuum state, even an ultrahigh vacuum state; the other vacuum tubes can be gradually reduced from the inner layer to the outer layer to a low vacuum or rough vacuum state; the more the layer number is, the smaller the pressure difference between the inside and the outside of each vacuum tube is, so that the quality requirement on the sliding sealing ring is relatively lower, and the product cost is reduced.
3. According to the invention, by adopting the multilayer vacuum tubes, each layer of vacuum tube can bear relatively small pressure difference, and the multilayer vacuum tubes can be overlapped to form large pressure difference between the innermost layer of the vacuum layering cover and the environment outside the vacuum switch tube; the vacuum tube in the vacuum layered cover can be gradually increased in vacuum state while the sealing element with relatively low quality requirement is adopted, and then the vacuum tube in the innermost layer of the vacuum layered cover can reach a relatively high vacuum state, so that the vacuum layered cover has a better insulation effect.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a layered high-voltage vacuum switch tube according to the present invention;
FIG. 2 is a schematic structural view of a stationary contact rod, a vacuum tube and a limiting ring;
FIG. 3 is a schematic structural diagram of the movable contact rod, the vacuum tube and the sliding seal ring;
in the drawings, the reference numbers indicate the following list of parts:
1-vacuum layered cover, 2-insulating shell, 3-shielding cover, 4-movable contact rod, 5-static contact rod, 6-corrugated pipe, 101-vacuum pipe, 102-spacing ring, 201-seal head A, 202-seal head B, 401-movable contact, 402-spacing column, 403-sliding sealing ring and 501-static contact.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship merely to facilitate description of the invention and to simplify the description, and are not intended to indicate or imply that the referenced components or elements must be in a particular orientation, constructed and operative in a particular orientation, and are not to be construed as limiting the invention.
Referring to fig. 1-3, the present invention is a layered high-voltage vacuum switch tube, which comprises a vacuum layered cover 1, an insulating housing 2, a shielding cover 3, a movable contact rod 4 and a static contact rod 5; a shielding cover 3 is fixed in the insulating shell 2; a seal head A201 and a seal head B202 are respectively fixed at two ends of the insulating shell 2; the movable contact rod 4 penetrates through and is in sliding fit with the seal head A201, and a corrugated pipe 6 is fixed between the peripheral side surface of the movable contact rod 4 and the inner wall of the seal head A201; the static contact rod 5 penetrates through and is fixed in the seal head B202; a moving contact 401 is fixed on the moving contact rod 4, and a fixed contact 501 is fixed on the fixed contact rod 5; the movable contact rod 4 penetrates through one side of the vacuum layering cover 1, the movable contact rod 4 is in sliding fit with the vacuum layering cover 1, and a sliding sealing ring 403 is arranged between the movable contact rod 4 and the vacuum layering cover 1; the static contact rod 5 penetrates through and is fixed on the other side of the vacuum layering cover 1; the vacuum layered cover 1 comprises at least one layer of vacuum tube 101; the internal vacuum degrees of a plurality of layers of vacuum tubes 101 in the vacuum layering cover 1 are gradually increased from the inner layer to the outer layer; the sliding seal ring 403 on the vacuum tube 101 can bear high working pressure, so that the interior of the vacuum tube 101 at the innermost layer in the vacuum layered cover 1 is set to be in the highest vacuum state, such as a high vacuum state or even an ultrahigh vacuum state; while the other vacuum tubes 101 can be gradually reduced from the inner layer to the outer layer to a low vacuum or rough vacuum state; the more the layer number is, the smaller the pressure difference between the inside and the outside of each vacuum tube 101 is, so that the requirement on the quality of the sliding sealing ring 403 is relatively low; specifically, the material should be selected according to the cost of using several vacuum tubes 101, the cost of the lowest quality of the sliding seal ring 403, and other factors.
Among them, the higher the vacuum state in the innermost vacuum tube 101 in the vacuum layered cover 1 is, the higher the insulation property is, thereby achieving an advantage of improving the insulation effect.
The sliding seal ring 403 is an O-ring rubber seal ring, which is referred to as an O-ring for short, and is a rubber ring having a circular cross-sectional shape. The O-shaped sealing ring is the most widely used sealing element in hydraulic and pneumatic systems; the O-shaped ring has good sealing performance, and can be used for static sealing and dynamic sealing; not only used alone, but also as an essential component in many combination sealing devices; it has wide application range, and can meet the requirements of various media and various motion conditions if the material is properly selected.
Preferably, through holes are formed in one side of each of the vacuum tubes 101 in the vacuum layering cover 1; through holes of the vacuum tubes 101 are fixedly connected with sliding seal rings 403; the sliding seal ring 403 is connected with the movable contact rod 4 in a sliding manner; the sliding seal ring 403 adopts an O-ring for gas sealing, that is, a relatively small pressure difference is borne by the multiple layers of vacuum tubes 101 and each layer of vacuum tube 101, so that a large pressure difference is formed between the innermost layer of the vacuum layered cover 1 and the environment outside the vacuum switch tube; namely, a sealing element with relatively low quality requirement is adopted, so that the vacuum state of the vacuum tube 101 in the step-by-step vacuum layering cover 1 is gradually improved, and then the vacuum tube 101 at the innermost layer of the vacuum layering cover 1 reaches a relatively high vacuum state.
Preferably, the air pressure difference value between the inside and the outside of the vacuum tubes 101 of the layers is 0.01MPa-0.05MPa.
Preferably, the movable contact rods 4 are all provided with limit posts 402 for limiting the movable range of the movable contact rods 4; the movable contact rod 4 and the limiting column 402 are of an integral structure.
Preferably, the circumferential side surface of the static contact rod 5 is provided with a plurality of limiting rings 102 matched with the vacuum tubes 101.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (3)
1. A layered high-voltage vacuum switch tube comprises an insulating shell (2), a shielding case (3), a movable contact rod (4) and a static contact rod (5); a shielding cover (3) is fixed in the insulating shell (2); a seal head A (201) and a seal head B (202) are respectively fixed at two ends of the insulating shell (2); the movable contact rod (4) penetrates through and is in sliding fit with the seal head A (201), and a corrugated pipe (6) is fixed between the peripheral side surface of the movable contact rod (4) and the inner wall of the seal head A (201); the static contact rod (5) penetrates through and is fixed in the seal head B (202); a moving contact (401) is fixed on the moving contact rod (4), and a fixed contact (501) is fixed on the fixed contact rod (5); the method is characterized in that: also comprises a vacuum lamination cover (1);
the movable contact rod (4) penetrates through one side of the vacuum layering cover (1), the movable contact rod (4) is in sliding fit with the vacuum layering cover (1), and a sliding sealing ring (403) is arranged between the movable contact rod (4) and the vacuum layering cover (1);
the static contact rod (5) penetrates through and is fixed on the other side of the vacuum layering cover (1);
the vacuum layered cover (1) comprises at least one layer of vacuum tube (101); the internal vacuum degrees of a plurality of layers of vacuum tubes (101) in the vacuum layering cover (1) are gradually increased from the inner layer to the outer layer;
through holes are formed in one side of each of the layers of vacuum tubes (101) in the vacuum layering cover (1); through holes of the vacuum tubes (101) in the layers are fixedly connected with sliding seal rings (403); the sliding seal ring (403) is connected with the movable contact rod (4) in a sliding manner; the sliding sealing ring (403) adopts an O-shaped ring for gas sealing;
the air pressure difference value between the inside and the outside of the vacuum tubes (101) of the layers is 0.01MPa-0.05MPa.
2. The layered high-voltage vacuum switch tube according to claim 1, wherein the movable contact rods (4) are provided with limiting columns (402) for limiting the movable range of the movable contact rods (4); the movable contact rod (4) and the limiting column (402) are of an integral structure.
3. The layered high-voltage vacuum switch tube as claimed in claim 1, wherein the peripheral side of the stationary contact rod (5) is provided with a plurality of position-limiting rings (102) which are matched with the vacuum tube (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010982020.9A CN112053897B (en) | 2020-09-17 | 2020-09-17 | Layered high-voltage vacuum switch tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010982020.9A CN112053897B (en) | 2020-09-17 | 2020-09-17 | Layered high-voltage vacuum switch tube |
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| Publication Number | Publication Date |
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| CN112053897A CN112053897A (en) | 2020-12-08 |
| CN112053897B true CN112053897B (en) | 2022-10-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010982020.9A Active CN112053897B (en) | 2020-09-17 | 2020-09-17 | Layered high-voltage vacuum switch tube |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61135016A (en) * | 1984-12-04 | 1986-06-23 | 三菱電機株式会社 | Vacuum switchgear |
| CN101297386A (en) * | 2005-11-02 | 2008-10-29 | 西门子公司 | Vacuum insulation switch equipment |
| CN102254758A (en) * | 2011-07-28 | 2011-11-23 | 苏州鼎能电力设备有限公司 | Arc extinguish chamber applied to breaker |
| CN104810195A (en) * | 2015-05-05 | 2015-07-29 | 西安交通大学 | Protecting structure for vacuum air extinguish chamber corrugated pipe under high gas pressure and application |
| CN106384691A (en) * | 2016-09-18 | 2017-02-08 | 李聪 | High-voltage circuit breaker device |
| CN208422771U (en) * | 2018-07-04 | 2019-01-22 | 江西旭光真空电器有限公司 | A kind of high leakproofness vacuum circuit breaker |
| CN210091978U (en) * | 2019-07-12 | 2020-02-18 | 汕头市崎碌电器实业有限公司 | Novel vacuum arc extinguish chamber |
| CN211376518U (en) * | 2019-10-22 | 2020-08-28 | 上海索菱电力科技有限公司 | Novel vacuum circuit breaker |
-
2020
- 2020-09-17 CN CN202010982020.9A patent/CN112053897B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61135016A (en) * | 1984-12-04 | 1986-06-23 | 三菱電機株式会社 | Vacuum switchgear |
| CN101297386A (en) * | 2005-11-02 | 2008-10-29 | 西门子公司 | Vacuum insulation switch equipment |
| CN102254758A (en) * | 2011-07-28 | 2011-11-23 | 苏州鼎能电力设备有限公司 | Arc extinguish chamber applied to breaker |
| CN104810195A (en) * | 2015-05-05 | 2015-07-29 | 西安交通大学 | Protecting structure for vacuum air extinguish chamber corrugated pipe under high gas pressure and application |
| CN106384691A (en) * | 2016-09-18 | 2017-02-08 | 李聪 | High-voltage circuit breaker device |
| CN208422771U (en) * | 2018-07-04 | 2019-01-22 | 江西旭光真空电器有限公司 | A kind of high leakproofness vacuum circuit breaker |
| CN210091978U (en) * | 2019-07-12 | 2020-02-18 | 汕头市崎碌电器实业有限公司 | Novel vacuum arc extinguish chamber |
| CN211376518U (en) * | 2019-10-22 | 2020-08-28 | 上海索菱电力科技有限公司 | Novel vacuum circuit breaker |
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| CN112053897A (en) | 2020-12-08 |
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