CN210091979U - Vacuum arc-extinguishing chamber of circuit breaker - Google Patents
Vacuum arc-extinguishing chamber of circuit breaker Download PDFInfo
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- CN210091979U CN210091979U CN201921291643.0U CN201921291643U CN210091979U CN 210091979 U CN210091979 U CN 210091979U CN 201921291643 U CN201921291643 U CN 201921291643U CN 210091979 U CN210091979 U CN 210091979U
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- end cover
- conducting rod
- contact
- circuit breaker
- static
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Abstract
The utility model discloses a vacuum arc extinguish chamber of a circuit breaker, which comprises a ceramic tube, a first end cover, a second end cover, a movable conducting rod and a static conducting rod, wherein the first end cover and the second end cover are respectively and fixedly connected with the two ends of the ceramic tube; one end of the movable conducting rod is provided with a movable contact, and the other end of the movable conducting rod penetrates through the second end cover; one end of the static conducting rod is provided with a static contact, and the other end of the static conducting rod penetrates through the first end cover; the moving contact is correspondingly matched with the static contact to form a contact group, and the contact group is positioned in the first end cover; the first end cover is internally provided with a shielding plate for isolating the ceramic tube from the contact group, and the middle part of the shielding plate is provided with a yielding through hole for the movable conducting rod to pass through. The utility model discloses a shield plate is kept apart ceramic pipe and contact group, compares with prior art's shield cover, and the structure of shield plate is very simple, easily shaping, and the material still less, the cost is lower.
Description
Technical Field
The utility model relates to a vacuum interrupter of circuit breaker.
Background
A vacuum arc-extinguishing chamber of an existing circuit breaker generally includes a ceramic tube, two end caps, a moving contact, a static contact, a moving conductive rod, and a static conductive rod, where the two end caps are respectively disposed at two ends of the ceramic tube, the moving contact and the static contact are located in one of the end caps, one end of the moving conductive rod is connected to the moving contact, the other end passes through the other end cap, one end of the static conductive rod is connected to the static contact, and the other end passes through one of the end. In order to avoid the phenomenon that electric arcs generated by the disconnection and the closing of the moving contact and the static contact are sprayed to the ceramic tube, a shielding cover is further arranged in one end cover of the vacuum arc extinguish chamber of the existing circuit breaker, and the shielding cover is cup-shaped and has a complex structure, so that the shielding cover is complex in process, high in material consumption and high in cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned technical problem that prior art exists, provide a novel vacuum interrupter of circuit breaker.
The utility model provides a technical scheme that its technical problem adopted is: a vacuum arc extinguish chamber of a circuit breaker comprises a ceramic tube, a first end cover, a second end cover, a movable conducting rod and a static conducting rod, wherein the first end cover and the second end cover are fixedly connected to two ends of the ceramic tube respectively; one end of the movable conducting rod is provided with a movable contact, and the other end of the movable conducting rod penetrates through the second end cover; one end of the static conducting rod is provided with a static contact, and the other end of the static conducting rod penetrates through the first end cover; the moving contact is correspondingly matched with the static contact to form a contact group, and the contact group is positioned in the first end cover; the first end cover is internally provided with a shielding plate for isolating the ceramic tube from the contact group, and the middle part of the shielding plate is provided with a yielding through hole for the movable conducting rod to pass through.
Furthermore, the inner wall of the first end cover is provided with an annular step, the periphery of the shielding plate is contacted and leaned against the annular step, and the shielding plate and the annular step are welded and fixed.
Furthermore, a convex shoulder is arranged on the periphery of the first end cover, and the contact group is located in the range of the convex shoulder.
Furthermore, the part of the first end cover connected with the ceramic tube is a thin-wall section.
Furthermore, the movable conducting rod is sleeved with a shielding cover with an opening facing the second end cover, and the movable conducting rod is further sleeved with a corrugated pipe located between the shielding cover and the second end cover.
Furthermore, the second end cover comprises a sealing ring, a guide sleeve and a fixing ring, the sealing ring is fixed at one end corresponding to the ceramic tube, the guide sleeve is fixed on the sealing ring through the fixing ring, and the movable conducting rod penetrates through the guide sleeve.
Furthermore, the shielding plate is made of metal.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses a shield plate is kept apart ceramic pipe and contact group, compares with prior art's shield cover, and the structure of shield plate is very simple, easily shaping, and the material still less, the cost is lower.
2. The accommodation space of contact group can be increased in the setting of convex shoulder to increase electric clearance, strengthen the utility model discloses a pressure resistance.
The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the vacuum interrupter of the circuit breaker of the present invention is not limited to the embodiment.
Drawings
Fig. 1 is a top view of the present invention;
fig. 2 is a sectional view taken along line a-a of the present invention.
Detailed Description
In an embodiment, please refer to fig. 1 and 2, a vacuum interrupter of a circuit breaker of the present invention is suitable for a low-voltage environment, and includes a ceramic tube 1, a first end cap 2, a second end cap 3, a movable conducting rod 6, and a static conducting rod 7, wherein the first end cap 2 and the second end cap 3 are respectively and fixedly connected to two ends of the ceramic tube 1; one end of the movable conducting rod 6 is provided with a movable contact 4, and the other end of the movable conducting rod penetrates through the second end cover 3; one end of the static conductive rod 7 is provided with a static contact 5, and the other end of the static conductive rod penetrates through the first end cover 2. The moving contact 4 is correspondingly matched with the static contact 5 and forms a contact group which is positioned in the first end cover 2. Set up shield plate 8 in the first end cover 2, keep apart ceramic tube 1 and contact group, this shield plate 8 middle part is equipped with the confession move the yielding through-hole 81 that conducting rod 6 passed. The shielding plate 8 is made of metal and is in a circular plate shape. The movable contact 4 is arranged at one end of the movable conductive rod 6, which means that the movable conductive rod 6 and the movable contact 4 are fixed together in a fixed connection manner (such as welding, threaded connection, clamping connection or the like) often adopted by discrete components or in an integrated forming manner. Similarly, the one end of the static conductive rod 7 is connected to the static contact 5, that is, the one end of the static conductive rod 7 and the static contact 5 are fixed together by adopting a fixed connection mode (such as welding, threaded connection, clamping connection or the like) often adopted by discrete components or an integrated forming mode. In this embodiment, the connection relationship between the first end cap 2 and the shielding plate 8 specifically includes: the inner wall of the first end cover 2 is provided with an annular step 21, the periphery of the shielding plate 8 is contacted and leaned against the annular step 21, and the shielding plate and the annular step 21 are welded and fixed. The connection relationship between the first end cap 2 and the shielding plate 8 is not limited to this, and in other embodiments, the first end cap 2 and the shielding plate 8 are connected by a fixing method such as a screw or a snap connection.
In this embodiment, the first end cap 2 is provided with a convex shoulder 22 around the circumference, and the contact set is located in the range of the shoulder 22. In particular, said shoulder 22 extends substantially from a location close to the shielding plate 8 to the end of the first end cap 2 remote from the ceramic tube 1. The setting of convex shoulder 22 can increase the accommodation space of contact group to increase the electric clearance, strengthen the utility model discloses a pressure resistance.
In this embodiment, the connection portion of the first end cap 2 and the ceramic tube 1 is a thin-walled segment 23, and the thin-walled segment 23 extends from the connection portion (i.e., the annular step) of the first end cap 2 and the shielding plate 8 to the end of the first end cap 2 contacting the ceramic tube 1. The thin-walled segment 23 can reduce the welding stress between the first end cap 2 and the ceramic tube 1.
In this embodiment, the movable conducting rod 6 is sleeved with a shielding cover 9 having an opening facing the second end cap 3, and the movable conducting rod 6 is further sleeved with a corrugated pipe 10 located between the shielding cover 9 and the second end cap 3.
In this embodiment, the second end cap 3 includes a sealing ring 31, a guiding sleeve 33, and a fixing ring 32, the sealing ring 31 is fixed at the corresponding end of the ceramic tube 1, the guiding sleeve 33 is fixed on the sealing ring 31 through the fixing ring 32, and the movable conducting rod 6 passes through the guiding sleeve 33.
The utility model discloses a vacuum interrupter of circuit breaker, it adopts shielding plate 8 to replace prior art's shield cover to keep apart ceramic tube 1 and contact group, not only does not influence the arc effect that keeps off, still has the structure very simple, easily shaping, and the material still less, effect such as the cost is lower.
The above embodiments are only used to further explain the vacuum interrupter of the circuit breaker of the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification made by the technical entity of the present invention to the above embodiments all fall into the protection scope of the technical solution of the present invention.
Claims (7)
1. A vacuum arc extinguish chamber of a circuit breaker comprises a ceramic tube, a first end cover, a second end cover, a movable conducting rod and a static conducting rod, wherein the first end cover and the second end cover are fixedly connected to two ends of the ceramic tube respectively; one end of the movable conducting rod is provided with a movable contact, and the other end of the movable conducting rod penetrates through the second end cover; one end of the static conducting rod is provided with a static contact, and the other end of the static conducting rod penetrates through the first end cover; the moving contact is correspondingly matched with the static contact to form a contact group, and the contact group is positioned in the first end cover; the method is characterized in that: the first end cover is internally provided with a shielding plate for isolating the ceramic tube from the contact group, and the middle part of the shielding plate is provided with a yielding through hole for the movable conducting rod to pass through.
2. Vacuum interrupter for a circuit breaker according to claim 1, characterized in that: the inner wall of the first end cover is provided with an annular step, the periphery of the shielding plate is contacted and leaned against the annular step, and the shielding plate and the annular step are welded and fixed.
3. Vacuum interrupter for a circuit breaker according to claim 1, characterized in that: the first end cover is provided with a convex shoulder on the periphery, and the contact group is positioned in the range of the convex shoulder.
4. Vacuum interrupter for a circuit breaker according to claim 1, characterized in that: the first end cover is connected with the ceramic tube through a thin-wall section.
5. Vacuum interrupter for a circuit breaker according to claim 1, characterized in that: the movable conducting rod is sleeved with a shielding cover with an opening facing the second end cover, and the movable conducting rod is further sleeved with a corrugated pipe located between the shielding cover and the second end cover.
6. Vacuum interrupter for a circuit breaker according to claim 1, characterized in that: the second end cover comprises a sealing ring, a guide sleeve and a fixing ring, the sealing ring is fixed at one end corresponding to the ceramic tube, the guide sleeve is fixed on the sealing ring through the fixing ring, and the movable conducting rod penetrates through the guide sleeve.
7. Vacuum interrupter for a circuit breaker according to claim 1, characterized in that: the shielding plate is made of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921291643.0U CN210091979U (en) | 2019-08-09 | 2019-08-09 | Vacuum arc-extinguishing chamber of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921291643.0U CN210091979U (en) | 2019-08-09 | 2019-08-09 | Vacuum arc-extinguishing chamber of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210091979U true CN210091979U (en) | 2020-02-18 |
Family
ID=69485902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921291643.0U Active CN210091979U (en) | 2019-08-09 | 2019-08-09 | Vacuum arc-extinguishing chamber of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210091979U (en) |
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2019
- 2019-08-09 CN CN201921291643.0U patent/CN210091979U/en active Active
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