CN205789720U - It is applied to low pressure, the switching device of medium-pressure or high pressure short circuit arc extinguishing - Google Patents
It is applied to low pressure, the switching device of medium-pressure or high pressure short circuit arc extinguishing Download PDFInfo
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- CN205789720U CN205789720U CN201620393737.9U CN201620393737U CN205789720U CN 205789720 U CN205789720 U CN 205789720U CN 201620393737 U CN201620393737 U CN 201620393737U CN 205789720 U CN205789720 U CN 205789720U
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Abstract
This utility model relates to being applied to low pressure, the switching device of medium-pressure or high pressure short circuit arc extinguishing, including housing, housing cavity two ends are respectively arranged with static contact, cylinder, piston it is provided with in cylinder, the bottom of cylinder is provided with gas generator, the front end of described piston is provided with moving contact, cylinder, piston and moving contact electrical connection, housing cavity is vacuum chamber near the side of static contact, described static contact front end is provided with anti-rebound buckle, described moving contact front end is provided with the guide and limit groove corresponding with anti-rebound buckle, described anti-rebound buckle front end and guide and limit groove have angle β, angle β scope is 5 ° to 15 °, it is provided with locating ring on described moving contact, guide and limit groove is formed between locating ring and moving contact, when moving contact squeezes into static contact, anti-rebound buckle is inserted in guide and limit groove.The beneficial effects of the utility model are that the reliability of locking is higher.
Description
Technical field
This utility model relates to a kind of switching device, is especially applicable to the short switch device in the shorting system of low pressure, middle pressure, high voltage short circuit arc extinguishing.
Background technology
Low pressure, medium and high pressure switchgear assemblies have distribution energy stream and guarantee the task of safety operation.In the case of the internal fault (fault electric arc) that probability is the least, it is also necessary to ensure that equipment safety and personal safety.Due to its temperature, the fault electric arc occurred in switchgear assemblies produces gas pressure drastically within the time period of several milliseconds and rises, and this may cause switchgear assemblies to be destroyed by blast.Therefore, the pressure that dissipates as quickly as possible is taken steps to.Additionally, it is desirable to arc fault is limited in relevant range, and operator must not be jeopardized.
By suitable design, such as, segment (compartmentalization) by the inside of switch panel, can greatly limit the generation of electric arc.For this purpose, each switch panel of switchgear assemblies has pressure release opening or pressure relief channels, and gas can exit into peripheral region by described opening or passage.Therefore, it can mainly by reducing the impact of arc duration fault restriction electric arc.
This can realize by means of suitable sensor, and light, temperature or pressure are reacted by these sensors, and discharges the circuit-breaker of upstream, usually feeding switch.This causes the arc duration (fault electric arc burnt in certain other insulating gas in gas atmo or subdivided portions (i.e. marker space (encapsulation)) or in solid (boundary region)) of 40 milliseconds to 80 milliseconds.This has the shortcoming that maximum machine load just occurs after about 10 milliseconds and only thermic load is reduced.This makes the firmest and expensive structure of switchgear assemblies, encapsulation or the design of solid insulation system necessitate.
Even if in order to overcome internal fault (fault electric arc) when pressure rises, it is desirable to a kind of switching equipment (switching device)-so-called shorting system of switching in several milliseconds.Exclusively, three-phase shortcircuit equipment, such as in air or SF6 switching these known to equipment.Under any circumstance, switching rate and isolating power reduce due to high surge current when repeating switching.By comparison, when using vacuum interrupter chamber (vacuum interrupter chamber), along with handover operation quantity increases, these electrical characteristics are kept approximately constant.
DE 199 21 173 A1 discloses a kind of based on " switching vacuum interrupter chamber " or the shorting system of the principle of " triggered vaccum gap ", and it comprises vacuum interrupter chamber in each is independent mutually or between phase.
DE 199 16 329 A1 discloses a kind of short-circuit device for fault arc protection device; for have gas generator and short-circuit plunger in the device being distributed electrical power; short-circuit plunger is directly driven by gas generator; for attaching the track to connect the electrical connection of rail; expect that it is compact for connecting rail; there is good piston guide, and be adapted in use to gas generator.This is achieved, because short-circuit plunger is directed and is maintained in connection rail, and because gas generator is embedded in holding part, described holding part has initial volume, is made up of insulant, and is attached directly to connect rail.
DE 197 468 15 A1 discloses similar for having the fault arc protection device in the device being distributed electrical power of gas generator; wherein; the short-circuit plunger driven by gas generator performs optimal moving suddenly; and simultaneously by fixing for transport; unrelated with fabrication tolerance, there is the further object reliably installing gas generator.
CN 101796604 B discloses a kind of short switch device, optimization further to short-circuiting means, and moving contact is squeezed into static contact by gas generator and realized short circuit, inserts in vacuum chamber by barrier film by static contact, it is to avoid breakdown between moving contact and static contact by it.The conical structure that the position, end of moving contact and static contact is complementary, after moving contact squeezes into static contact, by conical structure self-lock mechanism, prevents moving contact resilience.And in order to prevent moving contact from squeezing into the moment of static contact because releasing produces electric spark thus punctures vacuum area, it is optimized by CN 102138194A again, two regions of no pressure separated are set, arranged by the serial at least two separate vacuum district, even if lighting moment in gas generator, vacuum also keeps working.
The moving contact of above-mentioned patent and static contact all use cone complementary structure, although can prevent static contact resilience by its construction features, if but the active force of moving contact is the biggest, it is possible to resilience, resilience once occurs, and whole short-circuiting means just lost efficacy, and the loss caused is the most serious.
Utility model content
The problem existed for prior art, this utility model provides a kind of new application in low pressure, the switching device of medium-pressure or high pressure short circuit arc extinguishing, can effectively prevent short-circuit component resilience, cause short-circuit failure, improves device reliability.
The technical solution adopted in the utility model is:
It is applied to low pressure, the switching device of medium-pressure or high pressure short circuit arc extinguishing, including housing, housing cavity two ends are respectively arranged with static contact, cylinder, piston it is provided with in cylinder, the bottom of cylinder is provided with gas generator, the front end of described piston is provided with moving contact, cylinder, piston and moving contact electrical connection, housing cavity is vacuum chamber near the side of static contact, described static contact front end is provided with anti-rebound buckle, described moving contact front end is provided with the guide and limit groove corresponding with anti-rebound buckle, described anti-rebound buckle front end and guide and limit groove have angle β, angle β scope is 5 ° to 15 °, it is provided with locating ring on described moving contact, guide and limit groove is formed between locating ring and moving contact, when moving contact squeezes into static contact, anti-rebound buckle is inserted in guide and limit groove.
By such scheme, described anti-rebound buckle front end is parallel with moving contact axis, and described angle β is preferably 10 °.
By such scheme, described anti-rebound buckle includes that button, button front end are provided with the skewed slot of the lateral surface formation deformed region of discount, the button of described buckle and discount, and skewed slot bottom roundings processes, and skewed slot angle α scope is 60 ° to 120 °.
By such scheme, described angle α is preferably 90 °.
By such scheme, described static contact end is provided with cone shaped opening, and moving contact front end is provided with and the outer cone of cone shaped opening respective complementary.
By such scheme, described static contact end is provided with spherical opening, and moving contact front end is provided with and the bulb of spherical slit complementary.
By such scheme, described static contact end is provided with cylinder open, moving contact front end is provided with the stigma complementary with cylinder open, and the stigma end of static contact open end and moving contact all carries out chamfering or fillet processes, and is provided with conductive contact and refers in the cylinder open of described static contact.
By such scheme, described housing cavity is additionally provided with accumulation of energy and accelerates shear plate, and described shear plate is provided with shearing annular groove, and described locating ring is step, and locating ring step surface is close to by shear plate, and the external diameter of described locating ring no more than shears diameter of ring groove.
By upper such scheme, the hardness of described anti-rebound buckle is less than the hardness of locating ring.
By such scheme, described static contact is additionally provided with reinforcement version, strengthens version and be close to housing cavity side.
It should be noted that anti-rebound buckle front end can also be not parallel with moving contact axis, but can not be parallel with guide and limit groove, as long as anti-rebound buckle front end forms an angle with guide and limit groove, all constitute equivalent with this patent, drop into this patent protection domain.
The beneficial effects of the utility model are:
1, owing to being provided with anti-rebound buckle and guide and limit groove, and guide and limit groove forms an angle with anti-rebound buckle front end, when moving contact is driven into static contact, anti-rebound buckle on static contact is inserted in guide and limit groove under force, owing to guiding the hardness hardness less than locating ring of buckle, the discount of anti-rebound buckle deforms, it is close in gathering sill, owing to the spacing of gathering sill and gathering sill form an angle with moving contact axis, and then effectively prevent moving contact resilience from departing from static contact, thus further increase the reliability of switching device；
2, it is inserted in guide and limit groove by anti-rebound buckle due to this patent, and then prevent moving contact resilience, considerably increase moving contact and enter the shape range of choice of contact, moving contact and static contact can be complementary cones, can also be the spherical of complementation, all right complementary cylinder, considerably increases design space；
3, due to button and the skewed slot of discount lateral surface formation deformed region of anti-rebound buckle, it is simple to discount deforms relative to button, is easily inserted in guide and limit groove, carries out fillet process, prevent discount to be broken off bottom skewed slot；
4, owing to being provided with accumulation of energy acceleration shear plate at housing cavity, and locating ring is step, locating ring step surface is close to by shear plate, and on locating ring, it is provided with shearing annular groove, in there is the initial very short time of blast in gas generator, the pressure of cylinder is relatively small, prevention due to shear plate, piston can move, and then substantially increase the pressure of cylinder when piston is rushed out, ensure that piston has the biggest instantaneous acceleration, it is achieved that moving contact squeezes into static contact (within 2ms) within the extremely short time, and then realize short circuit, eliminate electric arc；
5, one end of described corrugated tube is connected with housing cavity wall by accumulation of energy acceleration shear plate, the other end of corrugated tube and the connection of moving contact, and then ensure that having moved static contact neighboring area can form region of no pressure, prevents under extreme field regime breakdown, improves device reliability；Even if gas generator is exploded, its gas produced also will not enter region of no pressure；
6, this utility model patent structure is reliable, and structure choice space is relatively large, applied range；
7, referring to owing to being provided with conductive contact on static contact, when moving contact is driven into static contact, this contact finger is fully contacted with moving contact, it is ensured that moving contact sufficiently makes electrical contact with static contact, further increases the reliability of equipment.
Accompanying drawing explanation
Fig. 1 is the structure diagram of this utility model switching device；
Fig. 2 is the structure diagram under this utility model switching device closure state；
Fig. 3 is the partial enlarged drawing in Fig. 1 at A；
Fig. 4 is the partial enlarged drawing in Fig. 1 at B；
Fig. 5 is the static contact of this utility model switching device and moving contact is the local structural graph of complementary spherical；
Fig. 6 is the static contact of this utility model switching device and moving contact is the local structural graph of complementary cylindrical.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not limited to this utility model.
Fig. 1 to Fig. 6 particularly illustrates the construction features of this patent, illustrates this utility model embodiment below in conjunction with Fig. 1 to Fig. 6.
Embodiment 1
nullIt is applied to low pressure、The switching device of medium-pressure or high pressure short circuit arc extinguishing，Including housing 2，Housing 2 inner chamber two ends are respectively arranged with static contact 1、Cylinder 12，Piston 11 it is provided with in cylinder 12，The bottom of cylinder 12 is provided with gas generator 14，The front end of described piston 11 is provided with moving contact 6，Piston 11、Cylinder 12 and moving contact 4 electrically connect，Dynamic fingertip 13 it is additionally provided with on piston，Ensure that piston 11 fully electrically connects with cylinder 12 in moving process，O 10 it is additionally provided with between piston and moving contact，The accumulation of energy arranged in one end of corrugated tube 9 and inner walls accelerates that shear plate 8 is airtight to be linked，The other end of corrugated tube 9 is airtight with the rear end of moving contact 6 to be linked，And then to realize static contact neighboring area be vacuum chamber，Described static contact 1 end is provided with anti-rebound buckle 5，Described moving contact 6 front end is provided with the guide and limit groove corresponding with anti-rebound buckle，Described anti-rebound buckle 5 front end is arranged in parallel relative to moving contact axis，Described guide and limit groove and moving contact axis have angle β，Angle β scope is 5 ° to 15 °，The present embodiment is preferably 10 °，It is provided with locating ring 7 on described moving contact 6，Guide and limit groove is formed between locating ring 7 and moving contact 6，When moving contact 6 is driven in static contact 1，Anti-rebound buckle is inserted in guide and limit groove，Anti-rebound buckle hardness is less than locating ring India，Anti-rebound buckle deforms during being inserted into guide and limit groove.
Described anti-rebound buckle 5 includes button 501, button 501 front end is provided with discount 502, the button 501 of described buckle 5 forms the skewed slot of deformed region with lateral surface 501A, 502A of discount 502, skewed slot angle α scope is 60 ° to 120 °, the present embodiment is preferably 90 degree, and the side 501A of button and the 502A junction, side of discount use fillet to process.
Described static contact 1 end is provided with cone shaped opening, and moving contact 6 front end is provided with and the outer cone of cone shaped opening respective complementary.
Described housing 2 inner chamber is additionally provided with accumulation of energy and accelerates shear plate 8, and described shear plate 8 is provided with shearing annular groove 801, and described locating ring 7 is in step, and locating ring 7 step surface is close to by shear plate 8, and the external diameter of described locating ring 7 is not more than shears annular groove 801 diameter.Housing 2 inner chamber is positioned on static contact 1 and is additionally provided with reinforcing plate 3, and reinforcing plate 3 is close to housing cavity side, it is ensured that when moving contact squeezes into static contact, and static contact is relatively small to the shock pressure of housing.
Embodiment 2
Difference with embodiment 1 is, described static contact 1 end is provided with spherical opening, and moving contact 6 front end is provided with and the bulb of spherical slit complementary, and described β angle is preferably 5 °, and described α angle is preferably 60 °.
Embodiment 2
Difference with embodiment 1 is, described static contact 1 end is provided with cylinder open, moving contact 6 front end is provided with the stigma complementary with cylinder open, the stigma end of static contact open end and moving contact all carries out chamfered, conduction static contact finger it is provided with in the cylinder open of described static contact, described β angle is preferably 15 °, and described α angle is preferably 120 °.
Claims (10)
1. it is applied to low pressure, the switching device of medium-pressure or high pressure short circuit arc extinguishing, including housing, housing cavity two ends are respectively arranged with static contact, cylinder, piston it is provided with in cylinder, the bottom of cylinder is provided with gas generator, the front end of described piston is provided with moving contact, cylinder, piston and moving contact electrical connection, housing cavity is vacuum chamber near the side of static contact, it is characterized in that: described static contact front end is provided with anti-rebound buckle, described moving contact front end is provided with the guide and limit groove corresponding with anti-rebound buckle, described anti-rebound buckle front end and guide and limit groove have angle β, angle β scope is 5 ° to 15 °, it is provided with locating ring on described moving contact, guide and limit groove is formed between locating ring and moving contact, when moving contact squeezes into static contact, anti-rebound buckle is inserted in guide and limit groove.
Switching device the most according to claim 1, it is characterised in that: described static contact front end is parallel with moving contact axis, and described angle β is preferably 10 °.
Switching device the most according to claim 1 and 2, it is characterized in that: described anti-rebound buckle includes that button, button front end are provided with the skewed slot of the lateral surface formation deformed region of discount, the button of described buckle and discount, skewed slot bottom roundings processes, and skewed slot angle α scope is 60 ° to 120 °.
Switching device the most according to claim 3, it is characterised in that: described angle α is preferably 90 °.
Switching device the most according to claim 1 and 2, it is characterised in that: described static contact end is provided with cone shaped opening, and moving contact front end is provided with and the outer cone of cone shaped opening respective complementary.
Switching device the most according to claim 1 and 2, it is characterised in that: described static contact end is provided with spherical opening, and moving contact front end is provided with and the bulb of spherical slit complementary.
Switching device the most according to claim 1 and 2, it is characterized in that: described static contact end is provided with cylinder open, moving contact front end is provided with the stigma complementary with cylinder open, the stigma end of static contact open end and moving contact all carries out chamfering or fillet processes, and is provided with conductive contact and refers in the cylinder open of described static contact.
Switching device the most according to claim 1 and 2, it is characterized in that: described housing cavity is additionally provided with accumulation of energy and accelerates shear plate, shearing annular groove it is provided with on described shear plate, described locating ring is step, locating ring step surface is close to by shear plate, and the external diameter of described locating ring no more than shears diameter of ring groove.
Switching device the most according to claim 1 and 2, it is characterised in that: the hardness of described anti-rebound buckle is less than the hardness of locating ring.
Switching device the most according to claim 1 and 2, it is characterised in that: it is additionally provided with reinforcement version on described static contact, strengthens version and be close to housing cavity side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620393737.9U CN205789720U (en) | 2016-05-04 | 2016-05-04 | It is applied to low pressure, the switching device of medium-pressure or high pressure short circuit arc extinguishing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620393737.9U CN205789720U (en) | 2016-05-04 | 2016-05-04 | It is applied to low pressure, the switching device of medium-pressure or high pressure short circuit arc extinguishing |
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| Publication Number | Publication Date |
|---|---|
| CN205789720U true CN205789720U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620393737.9U Withdrawn - After Issue CN205789720U (en) | 2016-05-04 | 2016-05-04 | It is applied to low pressure, the switching device of medium-pressure or high pressure short circuit arc extinguishing |
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| Country | Link |
|---|---|
| CN (1) | CN205789720U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105869953A (en) * | 2016-05-04 | 2016-08-17 | 中国船舶重工集团公司第七研究所 | Switching device applied to low voltage, medium voltage and high voltage short circuit arc extinction |
| CN108493017A (en) * | 2018-05-21 | 2018-09-04 | 江苏泓光轨道设备有限公司 | Railway switch machine change-over switch group |
-
2016
- 2016-05-04 CN CN201620393737.9U patent/CN205789720U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105869953A (en) * | 2016-05-04 | 2016-08-17 | 中国船舶重工集团公司第七研究所 | Switching device applied to low voltage, medium voltage and high voltage short circuit arc extinction |
| CN108493017A (en) * | 2018-05-21 | 2018-09-04 | 江苏泓光轨道设备有限公司 | Railway switch machine change-over switch group |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161207 Effective date of abandoning: 20181023 |
|
| AV01 | Patent right actively abandoned |