CN215911360U - Shielding structure of vacuum switch tube - Google Patents
Shielding structure of vacuum switch tube Download PDFInfo
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- CN215911360U CN215911360U CN202122041434.4U CN202122041434U CN215911360U CN 215911360 U CN215911360 U CN 215911360U CN 202122041434 U CN202122041434 U CN 202122041434U CN 215911360 U CN215911360 U CN 215911360U
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- contact
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- shielding
- insulating shell
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Abstract
The utility model discloses a shielding structure of a vacuum switch tube, wherein the vacuum switch tube comprises an insulating shell, a moving end assembly and a static end assembly, wherein the moving end assembly is arranged in the insulating shell and consists of a moving conductive rod and a moving contact; the movable conducting rod is externally provided with a corrugated pipe, the movable contact and the static contact are sleeved with shielding covers, and the upper end of each shielding cover is hermetically fixed on one end of the movable conducting rod close to the movable contact. According to the utility model, the shielding cover with the same potential as the movable end is arranged, so that metal steam formed by arcing between the contacts is blocked by the shielding cover, the corrugated pipe is protected, the evaporation of the metal steam on the inner wall of the insulating shell is reduced, the insulating capability of the product is improved, the service life of the product is prolonged, and the corrugated pipe has the advantages of simple structure, and the performance and the service life of the product are improved under the condition of not increasing the manufacturing cost.
Description
Technical Field
The utility model belongs to the technical field of switch tubes, particularly relates to a vacuum switch tube, and particularly relates to a shielding structure of the vacuum switch tube.
Background
The vacuum switch tube belongs to a passive electric vacuum device, and can be matched with various switch mechanisms to form high, medium and low voltage vacuum electrical appliances. Such as vacuum circuit breakers, vacuum load switches, vacuum contactors, and the like. It is widely applied to various industrial fields such as metallurgy, petroleum, electrified railway and the like. Vacuum switch tubes have been rapidly developed due to a series of advantages such as small volume, excellent performance, no pollution, long service life, safety, reliability, and suitability for frequent operation.
Referring to fig. 1, a schematic cross-sectional structure diagram of a conventional vacuum switch tube is shown, in which a moving end assembly including a moving conductive rod 2 and a moving contact 3, and a stationary end assembly including a stationary contact 4 and a stationary conductive rod 5 are disposed in an insulating housing 1 (generally, a magnetic tube), the moving contact 3 is fixed to one end of the moving conductive rod 2, the stationary contact 4 is fixed to one end of the stationary conductive rod 5, and the moving contact 3 and the stationary contact 4 are disposed opposite to each other. In order to improve the insulating property of the product, a shielding cover 6 is arranged on the static end assembly, namely the lower end of the shielding cover 6 is fixed with the static conductive rod 5, and the shielding cover 6 and the static end are arranged at the same potential. Although the structure plays a certain shielding role, metal steam 10 formed by arcing between the moving contact and the static contact can be evaporated to the outer wall of the corrugated pipe 7 and the inner wall of the insulating shell 1 (magnetic pipe) to form irregular metal particles, so that breakdown discharge is easily caused, and even the thin-wall part of the corrugated pipe is directly broken down to form small holes to cause air leakage, thereby causing product failure.
Disclosure of Invention
In order to overcome the defects, the utility model provides a shielding structure of a vacuum switch tube, which can protect a corrugated tube from shielding metal steam to the maximum extent, improve the insulating property of a product and prolong the service life of the product.
The technical scheme adopted by the utility model for solving the technical problem is as follows: a shielding structure of a vacuum switch tube comprises an insulating shell, a moving end assembly and a static end assembly, wherein the moving end assembly is arranged in the insulating shell and consists of a moving conductive rod and a moving contact; the corrugated pipe is arranged outside the movable conducting rod, the shielding cover is sleeved outside the movable contact and the static contact, and the upper end of the shielding cover is hermetically fixed at one end, close to the movable contact, of the movable conducting rod.
As a further improvement of the present invention, an annular rib is disposed at one end of the moving conducting rod close to the moving contact, and the upper end of the shielding cover is welded to the annular rib.
As a further improvement of the utility model, a guide sleeve is arranged outside the dynamic conducting rod.
As a further improvement of the present invention, a connecting ring is respectively disposed between the insulating housing and the guide sleeve and between the insulating housing and the static conductive rod.
As a further improvement of the utility model, the insulating shell is made of a ceramic material.
As a further improvement of the utility model, the moving contact and the static contact are made of CuCr30 material, the diameter of the moving contact and the static contact is 24-26mm, and the thickness of the moving contact and the static contact is 5-7 mm.
The utility model has the beneficial effects that: according to the utility model, the shielding cover with the same potential as the movable end is arranged, so that metal steam formed by arcing between the contacts is blocked by the shielding cover, the corrugated pipe is protected, the evaporation of the metal steam on the inner wall of the insulating shell is reduced, the insulating capability of the product is improved, the service life of the product is prolonged, and the corrugated pipe has the advantages of simple structure, and the performance and the service life of the product are improved under the condition of not increasing the manufacturing cost.
Drawings
FIG. 1 is a schematic diagram of a prior art shielding structure;
FIG. 2 is a schematic view of the structure of the present invention.
The following description is made with reference to the accompanying drawings:
1-insulating shell; 2-a movable conducting rod;
21-annular convex rib; 3-moving contact;
4-static contact; 5-static conductive rod;
6-shielding case; 7-corrugated pipe;
8, a guide sleeve; 9-connecting ring;
10-metal vapor.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 2, the shielding structure of a vacuum switch tube according to the present invention is shown, wherein the vacuum switch tube includes an insulating housing 1 made of a ceramic material, a moving end assembly disposed therein and composed of a moving conductive rod 2 and a moving contact 3, and a stationary end assembly composed of a stationary contact 4 and a stationary conductive rod 5, the moving contact 3 is fixed to one end of the moving conductive rod 2, the stationary contact 4 is fixed to one end of the stationary conductive rod 5, and the moving contact 3 and the stationary contact 4 are disposed opposite to each other. A corrugated pipe 7 and a guide sleeve 8 are arranged outside the movable conducting rod 2, the lower end of the insulating shell 1 is connected with the static conducting rod 2, the upper end of the insulating shell is connected with the guide sleeve 8 through connecting rings 9, the lower end of the corrugated pipe 7 is fixed on the movable conducting rod 2, and the upper end of the corrugated pipe is fixed with the guide sleeve 8. When the device works, the movable conducting rod 2 moves in the insulating shell 1 and the guide sleeve 8 under the drive of an external source, so that the movable contact 3 is driven to move back and forth relative to the static contact 4, and the on-off action is realized.
The main innovation of the utility model is that the moving contact and the static contact are sleeved with the shielding cover 6, and the upper end of the shielding cover 6 is hermetically fixed on one end of the moving conducting rod 2 close to the moving contact, so that the shielding cover and the moving end form the same potential. In order to better fix the shielding cover 6, an annular rib 21 is arranged at one end of the movable conducting rod close to the movable contact, and the upper end of the shielding cover 6 is welded on the annular rib 21. Therefore, when the vacuum switch tube works, metal steam 10 and gas molecules generated between the contacts are effectively shielded and remain on the inner side of the shielding cover, so that the metal steam and the gas molecules are prevented from diffusing to the inner wall and the outer wall of the corrugated tube and the inner wall of the insulating shell, a real shielding and protecting effect is achieved, the product failure is prevented, and the insulating property and the service life of the product are improved.
In addition, the moving contact 3 and the static contact 4 are made of CuCr30 material, the diameter of the moving contact is 24-26mm, and the thickness of the moving contact is 5-7mm, so that the moving contact and the static contact have better contact performance and service life.
Therefore, the shielding cover with the same potential as the movable end is arranged, so that metal steam formed by arcing between the contacts is blocked by the shielding cover, the corrugated pipe is protected, the evaporation of the metal steam on the inner wall of the insulating shell is reduced, the insulating capacity of the product is improved, the service life of the product is prolonged, and the corrugated pipe has the advantages of simple structure, and the performance and the service life of the product are improved under the condition of not increasing the manufacturing cost.
In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the present invention. The foregoing description is only a preferred embodiment of the utility model, which can be embodied in many different forms than described herein, and therefore the utility model is not limited to the specific embodiments disclosed above. And that those skilled in the art may, using the methods and techniques disclosed above, make numerous possible variations and modifications to the disclosed embodiments, or modify equivalents thereof, without departing from the scope of the claimed embodiments. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.
Claims (6)
1. A shielding structure of a vacuum switch tube comprises an insulating shell (1), a moving end assembly and a static end assembly, wherein the moving end assembly is arranged in the insulating shell and consists of a moving conductive rod (2) and a moving contact (3), the static end assembly consists of a static contact (4) and a static conductive rod (5), the moving contact (3) is fixed at one end of the moving conductive rod (2), the static contact (4) is fixed at one end of the static conductive rod (5), and the moving contact (3) and the static contact (4) are arranged oppositely; move conducting rod (2) and be equipped with bellows (7) outward, its characterized in that: the moving contact and the static contact are sleeved with shielding cases (6), and the upper ends of the shielding cases (6) are hermetically fixed at one ends of the moving conducting rods (2) close to the moving contact.
2. The shielding structure of a vacuum switching tube of claim 1, wherein: one end of the movable conducting rod, which is close to the movable contact, is provided with an annular convex rib (21), and the upper end of the shielding cover (6) is welded on the annular convex rib (21).
3. The shielding structure of a vacuum switching tube of claim 1, wherein: and a guide sleeve (8) is arranged outside the movable conducting rod (2).
4. The shielding structure of a vacuum switching tube according to claim 3, wherein: and connecting rings (9) are respectively arranged between the insulating shell (1) and the guide sleeve (8) and between the insulating shell and the static conductive rod.
5. The shielding structure of a vacuum switching tube of claim 1, wherein: the insulating shell (1) is made of ceramic materials.
6. The shielding structure of a vacuum switching tube of claim 1, wherein: the moving contact (3) and the static contact (4) are made of CuCr30 material, the diameter of the moving contact and the static contact is 24-26mm, and the thickness of the moving contact and the static contact is 5-7 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122041434.4U CN215911360U (en) | 2021-08-27 | 2021-08-27 | Shielding structure of vacuum switch tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122041434.4U CN215911360U (en) | 2021-08-27 | 2021-08-27 | Shielding structure of vacuum switch tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215911360U true CN215911360U (en) | 2022-02-25 |
Family
ID=80292844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122041434.4U Active CN215911360U (en) | 2021-08-27 | 2021-08-27 | Shielding structure of vacuum switch tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215911360U (en) |
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2021
- 2021-08-27 CN CN202122041434.4U patent/CN215911360U/en active Active
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