CN2413373Y - Low-voltage vacuum quenching chamber - Google Patents
Low-voltage vacuum quenching chamber Download PDFInfo
- Publication number
- CN2413373Y CN2413373Y CN 99241572 CN99241572U CN2413373Y CN 2413373 Y CN2413373 Y CN 2413373Y CN 99241572 CN99241572 CN 99241572 CN 99241572 U CN99241572 U CN 99241572U CN 2413373 Y CN2413373 Y CN 2413373Y
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- China
- Prior art keywords
- contact
- moving
- conductive rod
- shell
- headstock
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to an electric switch, particularly vacuum arc-extinguishing chamber for breaking the vacuum breaker of low-voltage loop current. The aim is to solve the problem of larger temperature raise of the arc-extinguishing chamber. The switch tube comprises an outer shell 1, cylindrical moving contact seat 6 connected with the moving conducting rod, a disk-shaped moving contact disk 7 on the front end of the cylindrical moving contact seat 6, a static contact 11 which is provided with a static conducting rod 12 fixedly connected with the outer shell and a cylindrical static contact seat 13 and a disk-shaped static contact plate 14 which is arranged on the front end of the static contact 11 and is matched with the moving contact disk, wherein, a moving contact 4 in the outer shell is provided with a moving conducting rod 5 on the outer shell and a telescopic corrugated pipe 9 sheathed on the moving contacting rod 5; the utility model is used for low voltage circuit with 380V to 1140V.
Description
The utility model relates to electric switch, particularly cut-offs the vacuum interrupter that the vacuum circuit-breaker of low tension loop electric current is used.
Existing low-voltage (the low-voltage vacuum arc control device that the circuit of 380V～1140V) is used, as shown in Figure 1, usually by the shell of tubular be installed in the shell by moving contact and two contacts of fixed contact of matching thereof and form.One end of shell 1 is the ceramic end made from pottery 2, and the other end is the metal end made from metal 3.Shell is used for vacuum seal and insulation, makes and forms vacuum and insulation environment in the shell.Moving contact 4 is by the moving conductive rod 5 that is installed in shell one end, makes with oxygen-free copper; that link to each other with moving conductive rod, columnar and can produce the movable contact headstock 6 of longitudinal magnetic field; that movable contact headstock front end links to each other, discoidal, by the movable contact cephalic disc 7 of doing telescopic motion of proprietary material manufacturing; passive moving supporting seat 8 in the movable contact headstock; be sleeved on the bellows 9 of the bar portion of moving conductive rod 5, the protective cover 10 of bellows is formed.Fixed contact 11 is by the static conductive rod 12 that installs the shell other end, link to each other with static conductive rod, with the stationary contact headstock 13 proprietary material manufacturing, columnar, that can produce longitudinal magnetic field, that the contact base front end links to each other, discoidal, by the stationary contact cephalic disc 14 that proprietary material is made, passive quiet supporting seat 15 is formed in the contact base.The moving conductive rod of low-voltage vacuum arc control device links to each other with the drive system of vacuum circuit-breaker by screw connection structure, moving contact moves with respect to fixed contact under the effect of drive system, and the elastic deformation energy of bellows can do relative motion moving contact with respect to fixed contact, thereby finishes switch motion.
During the operation of low-voltage vacuum arc control device, moving contact moves between the two positions, first position is two positions that contact is in contact with one another, be called closing position again, in this position, electric current flows into from the moving conductive rod of the moving contact of vacuum interrupter, through movable contact headstock, movable contact cephalic disc, the stationary contact cephalic disc of fixed contact, stationary contact headstock, static conductive rod flow out, perhaps the static conductive rod from fixed contact flows into, through stationary contact headstock, stationary contact cephalic disc, the movable contact cephalic disc of moving contact, movable contact headstock, driven static conductive rod flow out, and connect circuit; Second position is that two contacts are separated from each other the position of necessarily opening distance, is called switching-off device again, and in this position, vacuum interrupter cut-offs the electric current that flows through two contacts, and circuit disconnects.
At closing position, when rated operational current passes through from two contacts of vacuum interrupter are lasting, owing to constitute the metal material of two contacts of sound certain resistivity is arranged all, thereby can under the function of current, produce heating.In constituting the metal material of dynamic/static contact, again with the resistivity maximum of the material that constitutes the dynamic/static contact dish, simultaneously again owing to can produce bigger contact resistance at the contact-making surface of dynamic/static contact dish, so the dynamic/static contact dish is the operating largest heat source of vacuum interrupter.As previously mentioned, because under the dynamic/static contact installation vacuum environment in the enclosure, therefore the heating of dynamic/static contact dish generation can only pass in heat conducting mode by dynamic/static contact seat, sound supporting seat, sound conducting rod, the transmission of this heat will certainly cause the rising of temperature of the junction of dynamic/static contact and external circuit again, and product standard is conditional to the rising of this temperature, promptly requires the lift-off value of temperature the smaller the better.
Under the common situation, belong to flexible connection because the moving conductive rod of vacuum interrupter is connected with external circuit, so the contact resistance of junction is bigger, thereby produces certain caloric value, this place's temperature is further increased; And in the first side of stationary contact, because static conductive rod belongs to fixedly connected with being connected of external circuit, thereby the contact resistance of junction is much smaller with respect to the moving contact side, and the caloric value of generation is also much smaller, can not cause this place's temperature obviously to increase.From the above analysis, the temperature rise value that the temperature rise level of vacuum interrupter under rated operational current mainly is limited by the moving contact side is the lift-off value of temperature, if the temperature rise value of moving contact side is more little, temperature rise under the rated operational current of vacuum interrupter is more little, and then the raising of the rated operational current of vacuum interrupter is big more; Vice versa.
In existing vacuum interrupter, because static conductive rod 12 and stationary contact headstock 13 are two entities independently, the syndeton that the two adopts axis hole interlocking to contact with end face, thereby to produce certain contact resistance in the junction; Moreover, because the joint face diameter of the axis hole of two entities interlocking is significantly smaller than the diameter of two entities again, contacts the contact imprecision of end face with two, thereby weakened the capacity of heat transmission of fixed contact side.Therefore, the temperature rise value of moving contact side is often high 10～15 degrees centigrade than the temperature rise value of fixed contact side under normal conditions.This structure is totally unfavorable at the temperature rise value under the rated operational current for reducing vacuum interrupter.
Given this, the low-voltage vacuum arc control device that provide a kind of temperature rise value under rated operational current less are provided the purpose of this utility model.
The utility model adopts static conductive rod and stationary contact headstock are made into one realize its purpose on the basis of existing vacuum interrupter.
Low-voltage vacuum arc control device of the present utility model (referring to Fig. 2), the shell (1) that comprises the tubular that can seal and insulate, and be contained in moving contact and the fixed contact that matches in the shell, moving contact (4) has moving conductive rod (5) that is contained on the shell and the telescopic bellows (9) of going up suit thereof, the columnar movable contact headstock (6) that links to each other with moving conductive rod and the discoidal movable contact cephalic disc (7) of front end thereof, fixed contact (11) has the static conductive rod (12) that is connected on the shell, the discoidal stationary contact cephalic disc (14) that matches with the movable contact cephalic disc of columnar stationary contact headstock (13) and front end thereof, above-mentioned static conductive rod and stationary contact headstock are overall structure.
The metal end (3) that above-mentioned shell (1) has ceramic end (2) and links to each other has the moving supporting seat (8) that joins with movable contact cephalic disc (7) in the said movable contact headstock (6), the quiet supporting seat (15) that joins with stationary contact cephalic disc (14) is arranged in the stationary contact headstock (13).
There is cover to cover on the outer protective cover (10) of bellows on the above-mentioned moving conductive rod (5).
Operation of the present utility model is identical with common vacuum interrupter.
Said structure of the present utility model makes it have following advantage and effect.
One, static conductive rod of the present utility model and stationary contact headstock all-in-one-piece structure can overcome the contact resistance that static conductive rod and stationary contact headstock produce in the junction, can not produce the connection heat.
Two, static conductive rod of the present utility model and stationary contact headstock all-in-one-piece structure, the capacity of heat transmission of raising fixed contact side by a relatively large margin.
Three, dynamic/static contact dish of the present utility model and contact-making surface thereof move to the fixed contact lateral deviation, and helping the heat that the two and contact-making surface thereof produce can derive from the fixed contact side, alleviate the heat load of moving contact side.
In sum, the utlity model has under rated operational current the advantage that the temperature lift-off value is less.
The utility model is applicable to that the low voltage circuit of 380V～1140V uses.
Below, with embodiment and accompanying drawing thereof the utility model is done step ground explanation again.
Brief description of drawings.
Fig. 1 is the structural representation of existing low-voltage vacuum arc control device.
Fig. 2 is the structural representation of a kind of low-voltage vacuum arc control device of the present utility model.
Embodiment 1
A kind of low-voltage vacuum arc control device of the present utility model, as shown in Figure 2, by shell, moving contact, stationary contact is first-class constitutes.
Above-mentioned shell 1, adopting the cylindrical outer casing of common low-voltage vacuum arc control device, an end of shell is the ceramic end made from pottery 2, and the other end is the metal end made from metal 3, and ceramic end and metal end are socketed into an integral body.Shell is used for vacuum seal, insulation, makes and forms vacuum environment in the shell.Ceramic end has insulating effect, and metal end has the effect of shielded arc.The fixed contact that is vacuum seal in the shell and moving contact is housed and matches with insulating with moving contact.
Above-mentioned moving contact 4 adopts the moving contact structure of common low-voltage vacuum arc control device, is installed in the ceramic end 2 of shell one end.The moving conductive rod 5 that adopts common structure can do the multidiameter shape made from oxygen-free copper in the pole socket 16 of end of ceramic end 2 that telescopic motion ground is installed in shell is arranged, and the inner of the enlarged diameter section of moving conductive rod is fixed with protective cover 10 with annular cover seat 17.In protective cover, have be sleeved on the moving conductive rod, a bellows 9 that two ends join with pole socket and cover seat respectively.Be fixed with the columnar movable contact headstock 6 that can produce longitudinal magnetic field at the reduced diameter section of moving conductive rod suit successively, the moving supporting seat 8 in the movable contact headstock tube chamber, the discoidal movable contact cephalic disc 7 of joining with movable contact headstock and moving supporting seat, making by proprietary material.Moving supporting seat works to support the movable contact cephalic disc.
Above-mentioned fixed contact 11 is installed in the metal end 3 of the shell other end.Have and adopt common structure to be packed in the static conductive rod 12 of metal end 3 ends, have with the static conductive rod one and be the integrally-built cylindrical shape stationary contact headstock 13 that can produce longitudinal magnetic field, be fixed with the quiet supporting seat 15 that places stationary contact headstock tube chamber at the center line of static conductive rod and stationary contact headstock suit successively, and link to each other, join with stationary contact headstock and quiet supporting seat, by the discoidal stationary contact cephalic disc 14 of common proprietary material manufacturing.Quiet supporting seat works to support the stationary contact cephalic disc.
Claims (3)
1, the low-voltage vacuum arc control device, the shell (1) that comprises the tubular that can seal and insulate, and be contained in moving contact and the fixed contact that matches in the shell, moving contact (4) has moving conductive rod (5) that is contained on the shell and the telescopic bellows (9) of going up suit thereof, the columnar movable contact headstock (6) that links to each other with moving conductive rod and the discoidal movable contact cephalic disc (7) of front end thereof, fixed contact (11) has the static conductive rod (12) that is connected on the shell, the discoidal stationary contact cephalic disc (14) that matches with the movable contact cephalic disc of columnar stationary contact headstock (13) and front end thereof is characterized in that static conductive rod and stationary contact headstock are overall structure.
2, low-voltage vacuum arc control device according to claim 1, it is characterized in that the metal end (3) that said shell (1) has ceramic end (2) and links to each other, the moving supporting seat (8) that joins with movable contact cephalic disc (7) is arranged in the said movable contact headstock (6), the quiet supporting seat (15) that joins with stationary contact cephalic disc (14) is arranged in the stationary contact headstock (13).
3, low-voltage vacuum arc control device according to claim 1 and 2 is characterized in that having on the said moving conductive rod (5) cover to cover on the outer protective cover (10) of bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99241572 CN2413373Y (en) | 1999-11-17 | 1999-11-17 | Low-voltage vacuum quenching chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99241572 CN2413373Y (en) | 1999-11-17 | 1999-11-17 | Low-voltage vacuum quenching chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2413373Y true CN2413373Y (en) | 2001-01-03 |
Family
ID=34028407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99241572 Expired - Lifetime CN2413373Y (en) | 1999-11-17 | 1999-11-17 | Low-voltage vacuum quenching chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2413373Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594280A (en) * | 2013-10-31 | 2014-02-19 | 西安交通大学 | Novel composite contact vacuum arc-extinguishing chamber and vacuum circuit breaker with same |
| CN105590802A (en) * | 2014-10-23 | 2016-05-18 | 苏州市吴中区欣鑫开关配件厂 | Connecting apparatus of high-voltage circuit breaker and making method thereof |
-
1999
- 1999-11-17 CN CN 99241572 patent/CN2413373Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594280A (en) * | 2013-10-31 | 2014-02-19 | 西安交通大学 | Novel composite contact vacuum arc-extinguishing chamber and vacuum circuit breaker with same |
| CN105590802A (en) * | 2014-10-23 | 2016-05-18 | 苏州市吴中区欣鑫开关配件厂 | Connecting apparatus of high-voltage circuit breaker and making method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |