CN202678127U - Electric conduction system of switch device, low-voltage plastic-shell circuit breaker and thermal overload relay - Google Patents
Electric conduction system of switch device, low-voltage plastic-shell circuit breaker and thermal overload relay Download PDFInfo
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- CN202678127U CN202678127U CN 201220171163 CN201220171163U CN202678127U CN 202678127 U CN202678127 U CN 202678127U CN 201220171163 CN201220171163 CN 201220171163 CN 201220171163 U CN201220171163 U CN 201220171163U CN 202678127 U CN202678127 U CN 202678127U
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- moving contact
- circuit breaker
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- fixed
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses an electric conduction system of a switch device, a low-voltage plastic-shell circuit breaker and a thermal overload relay. The electric conduction system of the switch device comprises a shell, at least one static contact, a moving contact and an arc extinguishing system, wherein the static contact, the moving contact and the arc extinguishing system are all arranged on the shell. The electric conduction system is characterized in that the static contact comprises a rotatable contact support which is arranged on the shell in a pivoting manner, and the contact support is provided with a guide slot for accommodating electric arc ions on the surface moving around a rotation shaft of the contact support. By means of arranging the guide slot on the surface of the contact support to accommodate the diffusing electric arc ions, the problem that solid metal formed after the electric arc ions are coagulated blocks the rotation of the contact support is prevented, the influence of the electric arc ions to the breaking of the contacts is eliminated, and the reliability, breaking number of times and service life of a product are increased.
Description
Technical field
The utility model relates to the low tension switch technical field, in particular, relates to a kind of conducting system, low-pressure plastic shell circuit breaker and thermal overload relay of low tension switch device.
Background technology
Electric arc is a kind of physical phenomenon that device for switching is in operation and often runs into, and voltage reaches burning voltage when between the contact, and electric current also reaches arcing current, and the contact gap will produce electric arc.Low tension switch device such as circuit breaker and relay, when its contact separates in the short circuit current situation, current concentrated in the corresponding contact zone that diminishes gradually, so that contact point, surface temperature raise rapidly, molten bridge appears in the time of releasing, when electric current flows with conduction plasma column form, under electrodynamic effect, these liquid metal particles spread, most of can the absorption by arc control device, part electric arc then is diffused into the contact of moving contact and supports, the disjunction of follow-up low tension switch device is exerted an influence.Take moulded case circuit breaker as example, it is made of moving contact, fixed contact, arc quenching system, operating mechanism, electromagnetic system and shell usually, on moving contact, usually has molded contact support, the contact support is pivoted on the housing by rotating shaft, and its attended operation mechanism makes moving contact and fixed contact realize disconnecting and closed.Condensation of materials when being diffused in liquid metal particle in the contact support and running into low temperature has produced the solid metallic that condenses.If the processing that this part solid metallic is untimely, in follow-up rotating shaft rotation process, will increase the frictional force of contact support and housing, so that the situation of stagnant card appears in rotating shaft, thereby increased the time of mechanism action, increase contact wear and to the scaling loss of arc control device, can have a strong impact on next time contact disjunction generation, and finally cause disjunction to be lost efficacy.
The utility model content
Technical problem to be solved in the utility model provide a kind of can make dynamic and static contact repeatedly reliably, conducting system, low-pressure plastic shell circuit breaker and the thermal overload relay of the switching device that separates fast.
The purpose of this utility model is achieved through the following technical solutions:
A kind of conducting system of switching device, comprise housing, at least one fixed contact, a moving contact, arc quenching system, described fixed contact, moving contact and arc quenching system are installed on the housing, described moving contact comprises rotating contact support, and the contact support is pivoted on the housing, and described contact is supported in outer wall surface around its rotating shaft campaign and is provided with and holds the electro-ionic guide groove of electric arc.
Preferably, described housing is provided with the electro-ionic storage tank of storage electric arc in position corresponding to described moving contact closed trajectory.In the time of the switching device closure, part electric arc electron ion in the guide groove can drop along the closing direction of moving contact, arrange storage tank in position corresponding to moving contact closed trajectory this moment, just can catch this partial ionization, locate with the slit that the electron ion of avoiding solidifying is fallen between contact support and the housing again, cause the situation of the card that stagnates, further promoted the reliability of switch.
A kind of low-pressure plastic shell circuit breaker comprises the conducting system of above-mentioned a kind of switching device.
Preferably, described low-pressure plastic shell circuit breaker also comprises operating mechanism, described conducting system comprises two fixed contacts and a moving contact, described moving contact comprises that rotating contact support and two ends have the tactile bridge of the moving contact of following respectively two fixed contacts cooperations, described tactile bridge is fixed on described contact and supports, described operating mechanism and contact Supporting connectivity band moving contact support operation realize disconnection and the closure of moving contact and fixed contact.
Preferably, it is hollow cylindric that described contact support is, its cylindrical outer wall is provided with two ports splitting, described tactile bridge runs through two ports, and the inside of contact support is provided with two groups of springs, and an end of two ports is provided with a spring fixed axis, one end of described every group of spring is fixed on the spring fixed axis, the other end extends to the another one passage port, connects with tactile bridging tactile bridge is installed in the contact support, and described guide groove is arranged on the described outer wall.
Preferably, the width of described guide groove is greater than the thickness that touches bridge.So that guide groove can receive the electron ion that is diffused into the contact support surface fully.
Preferably, be rotating shaft in the middle of the outer wall both sides end face that described contact is supported, be provided with connecting shaft on the rotating shaft side, described connecting shaft is connected with described operating mechanism by connecting rod.
A kind of thermal overload relay comprises the conducting system of above-mentioned a kind of switching device.
The utility model is by arranging guide groove in the contact support surface, when at the moving contact short circuit breaking, partial ionization moves along contact disjunction direction, can drop in the guide groove of contact support surface, even if this moment, electron ion was condensed in contact support cooling, owing to being recessed in the guide groove, can not affect the motion that contact is supported, eliminated the impact that these electric arc electron ion produce the contact disjunction, as long as channel depths and volume can hold abundant electron ion, even if repeatedly behind the short circuit breaking, can guarantee that still the contact support rotates smoothly, make, fixed contact is repeatedly reliable, fast separately.Preferably be provided with reliability, disjunction number of times and the life-span that storage tank then can further improve product in position corresponding to housing.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment moving contact closure state;
Fig. 2 is the structural representation of the utility model embodiment moving contact disjunction state;
Fig. 3 is the structural representation of the utility model embodiment moving contact;
Fig. 4 is that Fig. 3 is along the schematic diagram of A-A section;
Fig. 5 is the utility model embodiment housing schematic diagram;
Wherein: 11, operating mechanism; 12, housing; 13, connecting rod; 14, arc control device; 15, fixed contact; 16, fixed contact; 17, moving contact; 19, touch bridge; 25, handle; 26, storage tank; 27, electron ion; 30, guide groove; 31, spring fixed axis; 32, spring; 33, connecting shaft; 34, contact support; 101, moving contact; 102, conducting system.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and preferred embodiment.
A kind of switching device, such as low-pressure plastic shell circuit breaker and thermal overload relay, comprise housing, at least one fixed contact, a moving contact, arc quenching system, described fixed contact, moving contact and arc quenching system are installed on the housing, it is characterized in that, described moving contact comprises rotating contact support, and the contact support is pivoted on the housing, and described contact is supported in outer wall surface around its rotating shaft campaign and is provided with and holds the electro-ionic guide groove of electric arc.The below further sets forth design of the present utility model take low-pressure plastic shell circuit breaker as example:
As shown in Figure 1 and Figure 2, low-pressure plastic shell circuit breaker is made of conducting system 102, operating mechanism 11, handle 25, connecting rod 13, electromagnetic trip system (not shown).Connecting rod 13 is used for connecting conducting system 102 and operating mechanism 11, and handle 25 is connected with operating mechanism 11.Can pull operating mechanism 11 by handle 25; and then moving contact 101 motions of passing through connecting rod 13 drive conducting systems 102 realize that low-pressure plastic shell circuit breakers close a floodgate, separating brake; the electromagnetic trip system can automatic disconnection circuit breaker, protective circuit and equipment thereof when circuit has fault (for example overload, short circuit).
Described conducting system 102 is by comprising the housing 12 with storage tank 26, and 101, two of moving contacts have the fixed contact 15 of fixed contact 16, and arc control device 14 consist of.Fixed contact 15 and moving contact 101 are located in the housing 12, the body of two fixed contacts 15 extends to outside the housing 12 and is connected with outer electrode, its fixed contact 16 is the diagonal angle and distributes in housing 12 inside, accordingly, moving contact 101 comprises that two 17, two moving contacts 17 of moving contact that cooperate with two fixed contacts 16 respectively are arranged at tactile bridge 19 two ends.Fixed contact 16, moving contact 17 can cover on the surface the low materials of conductivity such as silver, gold.Touching bridge 19 is fixed in the contact support 34, two moving contacts 17 that rotarily drive by contact support 34 move, realize separating brake, the closing operation of circuit breaker, be provided with arc control device 14 in the position of closing on described moving contact 101 movement locus, be used for receiving dynamic/static contact and separate the electric arc that produces.
Described moving contact 101 is by comprising the tactile bridge 19 with moving contact 17, have the contact support 34 of holding electron ion guide groove 30, spring 32, spring fixed axis 31 formations as shown in Figure 3-4.It is hollow cylindric that contact support 34 is, its cylindrical outer wall is provided with two ports splitting, outer wall is divided into symmetrical two parts, two symmetrical outer wall surface are respectively arranged with and can hold the electro-ionic guide groove 30 of electric arc between two ports, and the thickness that the Width of guide groove 30 touches bridge 19 is large, so that guide groove 30 can receive the electron ion that is diffused into the contact support surface fully.Described tactile bridge 19 runs through two ports, two moving contacts 17 extend out from two ports respectively, the inside of contact support 34 is provided with two groups of springs 32, one end of two openings respectively is provided with a spring fixed axis 31, every group of spring 32 1 ends are fixed on contact by spring fixed axis 31 and support on 34, the other end extends to the another one passage port, is connected with spring holddown groove on the tactile bridge 19 will touch bridge 19 and be installed in contact and support on 34.Be rotating shaft in the middle of the outer wall both sides end face of contact support 34, be provided with connecting shaft 33 on the rotating shaft side, described connecting shaft 33 is connected with an end of connecting rod 13, and the other end of described connecting rod 13 is connected with operating mechanism 11.Described handle 25 can be pulled operating mechanism 11, and then passes through connecting rod 13 band moving contacts and support 34 rotations, realizes closure and the disconnection of moving contact 17 and fixed contact 16.
Be illustrated in figure 5 as housing 12 schematic diagrames, contact support 34 is fixed on the housing 12, and described housing 12 is provided with the electro-ionic storage tank 26 of storage in position corresponding to described moving contact 101 closed trajectories.
When low-pressure plastic shell circuit breaker is subject to heavy current impact, touch bridge 19 and under electrodynamic action, scold out, produce electric arc, most electric arc electron ion is blown in the arc control device 14, is extinguished by arc control device.But few electric arc electron ion 27 (referring to Fig. 2) can be supported towards contact 34 direction motion, except being blocked enclosure interior by housing of dispersing, the electron ion 27 of normal direction motion will be adsorbed on contact and support 34 surface, because the surface of contact support 34 is provided with guide groove 30, this guide groove 30 just in time can hold these electron ion 27.When low-pressure plastic shell circuit breaker closes a floodgate again, electron ion 27 on the guide groove 30 can fall into storage tank 26 with the rotation of contact support 34, thereby eliminated the impact that these electron ion 27 produce the contact disjunction, friction when having avoided contact support 34 to rotate with housing 12, reliability, disjunction number of times and the life-span of having improved product.
Above content is in conjunction with the low-pressure plastic shell circuit breaker further detailed description of the utility model, and the utility model also can be used for other switching devices such as thermal overload relay, and concrete principle is approximate, does not repeat them here.For the utility model person of ordinary skill in the field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (8)
1. the conducting system of a switching device, comprise housing, at least one fixed contact, a moving contact, arc quenching system, described fixed contact, moving contact and arc quenching system are installed on the housing, it is characterized in that, described moving contact comprises rotating contact support, the contact support is pivoted on the housing, and described contact is supported in outer wall surface around its rotating shaft campaign and is provided with and holds the electro-ionic guide groove of electric arc.
2. the conducting system of a kind of switching device as claimed in claim 1 is characterized in that, described housing is provided with the electro-ionic storage tank of storage electric arc in position corresponding to described moving contact closed trajectory.
3. a low-pressure plastic shell circuit breaker is characterized in that, comprises the conducting system of a kind of switching device as claimed in claim 1 or 2.
4. a kind of low-pressure plastic shell circuit breaker as claimed in claim 3, it is characterized in that, also comprise operating mechanism, described conducting system comprises two fixed contacts and a moving contact, described moving contact comprises that rotating contact support and two ends have the tactile bridge of the moving contact of following respectively two fixed contacts cooperations, described tactile bridge is fixed on described contact and supports, described operating mechanism and contact Supporting connectivity band moving contact support operation realize disconnection and the closure of moving contact and fixed contact.
5. a kind of low-pressure plastic shell circuit breaker as claimed in claim 4, it is characterized in that, it is hollow cylindric that described contact support is, its cylindrical outer wall is provided with two ports splitting, described tactile bridge runs through two ports, the inside of contact support is provided with two groups of springs, one end of two ports is provided with a spring fixed axis, one end of described every group of spring is fixed on the spring fixed axis, the other end extends to the another one passage port, connect with tactile bridging and tactile bridge to be installed in contact to support, described guide groove is arranged on the described outer wall.
6. a kind of low-pressure plastic shell circuit breaker as claimed in claim 4 is characterized in that, the width of described guide groove is greater than the thickness that touches bridge.
7. a kind of low-pressure plastic shell circuit breaker as claimed in claim 5 is characterized in that, is rotating shaft in the middle of the outer wall both sides end face that described contact is supported, is provided with connecting shaft on the rotating shaft side, and described connecting shaft is connected with described operating mechanism by connecting rod.
8. a thermal overload relay is characterized in that, comprises the conducting system of a kind of switching device as claimed in claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220171163 CN202678127U (en) | 2012-04-19 | 2012-04-19 | Electric conduction system of switch device, low-voltage plastic-shell circuit breaker and thermal overload relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220171163 CN202678127U (en) | 2012-04-19 | 2012-04-19 | Electric conduction system of switch device, low-voltage plastic-shell circuit breaker and thermal overload relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202678127U true CN202678127U (en) | 2013-01-16 |
Family
ID=47499012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220171163 Withdrawn - After Issue CN202678127U (en) | 2012-04-19 | 2012-04-19 | Electric conduction system of switch device, low-voltage plastic-shell circuit breaker and thermal overload relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202678127U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623199A (en) * | 2012-04-19 | 2012-08-01 | 上海诺雅克电气有限公司 | Electric conduction system of switch device, low-voltage plastic-shell circuit breaker and thermal overload relay |
| CN108987138A (en) * | 2017-06-01 | 2018-12-11 | 泰科电子(深圳)有限公司 | Electrical contact system |
-
2012
- 2012-04-19 CN CN 201220171163 patent/CN202678127U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623199A (en) * | 2012-04-19 | 2012-08-01 | 上海诺雅克电气有限公司 | Electric conduction system of switch device, low-voltage plastic-shell circuit breaker and thermal overload relay |
| CN102623199B (en) * | 2012-04-19 | 2015-03-18 | 上海诺雅克电气有限公司 | Electric conduction system of switch device, low-voltage plastic-shell circuit breaker and thermal overload relay |
| CN108987138A (en) * | 2017-06-01 | 2018-12-11 | 泰科电子(深圳)有限公司 | Electrical contact system |
| CN108987138B (en) * | 2017-06-01 | 2024-02-02 | 泰科电子(深圳)有限公司 | Electrical contact system |
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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: 20130116 Effective date of abandoning: 20150318 |
|
| RGAV | Abandon patent right to avoid regrant |