CN117594391A - High-speed switch structure for direct-current air circuit breaker - Google Patents
High-speed switch structure for direct-current air circuit breaker Download PDFInfo
- Publication number
- CN117594391A CN117594391A CN202311417727.5A CN202311417727A CN117594391A CN 117594391 A CN117594391 A CN 117594391A CN 202311417727 A CN202311417727 A CN 202311417727A CN 117594391 A CN117594391 A CN 117594391A
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- contact
- inclined plane
- circuit breaker
- air circuit
- current air
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- 230000003068 static effect Effects 0.000 claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims description 10
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The application provides a high-speed switch structure for a direct-current air circuit breaker, which comprises a moving contact and fixed contacts symmetrically arranged on two sides of the moving contact; the two sides of the moving contact are provided with a first inclined plane, the side surface of the fixed contact is provided with a second inclined plane which is in matched contact with the first inclined plane, and the first inclined plane and the second inclined plane are both conductive; one end of the first inclined plane is hinged to the movable contact, and an elastic piece is arranged between the first inclined plane and the side face of the movable contact; or one end of the second inclined plane is hinged on the static contact, and an elastic piece is arranged between the second inclined plane and the static contact. The high-speed switch structure can effectively solve the problems of reclosing and separating the moving contact, the moving contact and the fixed contact are connected in a matched mode by adopting a bolt, so that the contact is better when the high-speed switch is Guan Gezha, the contact resistance between the moving contact and the fixed contact is reduced, the current carrying capacity of the high-speed switch is further enhanced, the heating of the contact when the high-speed switch Guan Eding of the direct-current air circuit breaker is in through flow can be reduced, and the service life of the high-speed switch is effectively prolonged.
Description
Technical Field
The application belongs to the technical field of direct current air circuit breakers, and particularly relates to a high-speed switch structure for a direct current air circuit breaker.
Background
The existing direct current air circuit breaker mainly combines a high-speed mechanical switch with a thyristor semiconductor device, has the main advantages of large current carrying capacity, instantaneous turn-off and current limiting capacity, and has become a new main direction research of direct current of a power grid.
However, when the high-speed switch of the existing direct current air circuit breaker is disconnected, the moving contact moves upwards under the action of the repulsive force of the upper end, the upper end connector spring is compressed, and when the upper end connector spring is compressed to a certain degree, the moving contact bounces under the action of the spring and moves downwards; at this time, the fixed contact moves upwards in the free extension process of the lower spring, and in the process, the moving contact and the fixed contact may contact again, or the gap between the moving contact and the fixed contact is too small to be broken down, namely, the reclosing phenomenon of the high-speed Guan Dongjing contact may occur. In addition, when the high-speed switch of the existing direct current air circuit breaker is switched on, the moving contact moves downwards under the action of the repulsive force at the upper end, the spring below the fixed contact is compressed after the moving contact contacts the fixed contact, after the moving contact is compressed to a certain extent, the moving contact integrally bounces under the action of the spring and moves upwards, and the phenomenon that the moving contact is separated again possibly occurs in the process.
The problem of reclosing after the moving and fixed contact structures of the high-speed switch of the existing direct current air circuit breaker are closed and the problem of reclosing after the moving and fixed contacts are closed are solved, and although the assembly process of the high-speed switch is continuously optimized, the problem cannot be thoroughly solved.
Disclosure of Invention
The utility model aims at providing a high-speed switch structure for direct current air circuit breaker to solve the technical problem that "reclosing" and "heavy separating brake" easily appear in the high-speed switch of direct current air circuit breaker among the prior art.
In order to achieve the above purpose, the technical scheme adopted in the application is as follows: the high-speed switch structure for the direct-current air circuit breaker comprises a moving contact and fixed contacts symmetrically arranged on two sides of the moving contact; the two sides of the moving contact are provided with first inclined planes, the side surface of the fixed contact is provided with a second inclined plane which is in matched contact with the first inclined plane, and the first inclined plane and the second inclined plane are conductive;
one end of the first inclined plane is hinged to the movable contact, and an elastic piece is arranged between the first inclined plane and the side face of the movable contact; or one end of the second inclined plane is hinged to the static contact, and an elastic piece is arranged between the second inclined plane and the static contact.
Further, the fixed contact comprises a plurality of fixed contact units which are arranged side by side, and the fixed contact units are connected into a whole through a connecting rod; each static contact unit comprises a static contact body and a static contact spring piece obliquely hinged to one side of the static contact body, a spring is arranged between the static contact spring piece and the static contact body, and the static contact spring piece is provided with a second inclined plane.
Further, a plurality of fixed contact units are arranged at intervals.
Further, the interval between two adjacent fixed contact units is 1-2mm.
Further, the fixed contact body is provided with a hinged arc groove, and one end of the fixed contact spring plate is provided with an arc rod matched and hinged with the hinged arc groove.
Further, a spring mounting hole is formed in the side face of the fixed contact body.
Further, the first inclined plane and the second inclined plane are both provided with conductive sheets.
Further, the conductive sheet is a silver sheet.
Further, a weight-reducing groove is formed in the moving contact.
Further, a pull rod is connected to the moving contact, and the pull rod is used for being connected with a power mechanism.
Compared with the prior art, the application has the following technical effects:
according to the high-speed switch structure for the direct-current air circuit breaker, the moving contact and the fixed contact are contacted through the inclined plane, the elastic piece is arranged between the inclined plane and the moving contact or between the inclined plane and the fixed contact, when the moving contact moves downwards and is switched on with the fixed contact, after one movable inclined plane in contact between the moving contact and the fixed contact is subjected to extrusion force, compression can occur in the horizontal direction under the action of the elastic piece, even if the moving contact can rebound upwards to a certain extent in the vertical direction, the contact inclined plane of the moving contact and the contact inclined plane of the fixed contact still can keep in a close contact state, and the phenomenon of heavy switching-off is avoided.
In the same way, when the movable contact moves upwards and is separated from the fixed contact, even if the movable contact moves downwards to a certain extent in the vertical direction, one movable inclined plane contacted between the movable contact and the fixed contact is elongated in the horizontal direction instead of the vertical direction in the process, so that the reclosing phenomenon is avoided, and the problem of heavy strike through caused by the fact that the movable contact is contacted again or the gap between the movable contact and the fixed contact is too small can be avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the overall structure of a high-speed switch structure for a dc air circuit breaker according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of the stationary contact of FIG. 1;
FIG. 3 is a schematic top view of FIG. 2;
fig. 4 is a schematic structural view of the stationary contact unit in fig. 2;
fig. 5 is a schematic structural diagram of the moving contact in fig. 1.
Wherein, each reference sign in the figure:
1. the movable contact, 2, the fixed contact, 3, the spring, 4, the conducting strip, 5, the pull rod, 101, the weight-reducing groove, 201, the fixed contact unit, 2011, the fixed contact body, 2012, the fixed contact shrapnel, 20111, the arc-shaped groove, 20121 and the arc-shaped rod.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first," second, "" third, "" fourth, "and fifth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "first", "second", "third", "fourth", "fifth" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1 to 5, a high-speed switch structure for a dc air circuit breaker according to an embodiment of the present application will be described.
In one embodiment of the present application, a high-speed switch structure for a dc air circuit breaker of the embodiment of the present application includes a moving contact 1 and fixed contacts 2 symmetrically disposed on both sides of the moving contact; the left and right sides of the moving contact 1 are provided with first inclined planes, the side face of the fixed contact 2 is provided with a second inclined plane which is in fit contact with the first inclined plane, and the first inclined plane and the second inclined plane are conductive.
One end of the first inclined plane is hinged to the moving contact 1, and an elastic piece is arranged between the first inclined plane and the side surface of the moving contact 1 and can be a spring 3; or one end of the second inclined plane is hinged on the fixed contact 2, and an elastic element which can be a spring 3 is arranged between the second inclined plane and the fixed contact 2.
Only one of the first inclined plane and the second inclined plane can be compressed or extended in the horizontal direction under the action of the elastic element in the process of contacting the moving contact 1 and the fixed contact 2.
Fig. 1 shows one of the possible structures, namely, the left and right sides of the moving contact 1 are provided with fixed first inclined planes, the side surface of the fixed contact 2 is provided with a movable second inclined plane, one end of the second inclined plane is hinged on the fixed contact 2, a spring 3 is arranged between the second inclined plane and the fixed contact 2, one end of the spring 3 can be fixedly connected on the side surface of the fixed contact 2, and when the spring 3 is in a natural extension state, the other end of the spring is just abutted against the second inclined plane.
According to the high-speed switch structure for the direct-current air circuit breaker, when the switching-on operation is carried out, the moving contact 1 moves downwards under the action of the power mechanism, the power mechanism adopts the prior art, such as a permanent magnet mechanism, and the moving contact 1 is driven to move downwards by the electric action of a switching-on coil in the permanent magnet mechanism. A pull rod 5 can be connected to the movable contact 1, and the pull rod 5 is used for connecting a power mechanism. In addition, the structures such as the connection braid and the connection block connected with the fixed contact 2 are also the prior art, and not described in detail herein, and the embodiment of the present application focuses on the improvement of the structures of the moving contact 1 and the fixed contact 2.
When the moving contact 1 moves downwards to be in contact with the fixed contact 2, the first inclined surface of the moving contact 1 is in contact with the second inclined surface of the fixed contact 2 to conduct electricity until the closing process is completed. Because of the inclined plane contact between the moving contact 1 and the fixed contact 2 of the high-speed switch structure, a spring 3 is arranged between the second inclined plane and the fixed contact 2, and when the moving contact 1 moves downwards and is switched on with the fixed contact 2, the second inclined plane is compressed in the horizontal direction under the action of the spring 3 after receiving the extrusion force. At this time, even if the moving contact 1 can rebound upwards to a certain extent in the vertical direction, the contact inclined plane of the moving contact 1 and the fixed contact 2 still can keep a close contact state in the process, so that the phenomenon of heavy brake separation is effectively avoided.
Similarly, when the brake is opened, the moving contact 1 moves upwards under the action of the power mechanism, and the moving contact 1 can be driven to move upwards by the permanent magnet mechanism and the repulsive force coil. The movable contact 1 moves upwards to be gradually separated from the fixed contact 2 until the brake separating process is completed. Because of the inclined plane contact between the moving contact 1 and the fixed contact 2 of the high-speed switch structure, a spring 3 is arranged between the second inclined plane and the fixed contact 2, when the moving contact 1 moves upwards and is separated from the fixed contact 2, the second inclined plane is gradually disappeared by the extrusion force, and natural extension can occur in the horizontal direction under the action of the spring 3. At this time, even if the moving contact 1 can rebound downwards to a certain extent in the vertical direction, the second inclined plane extends in the horizontal direction instead of the vertical direction, so that the reclosing phenomenon can be effectively avoided, and the problem that the moving contact contacts contact again or strike through due to too small gap of the moving contact is avoided.
The high-speed switch structure for the direct-current air circuit breaker can effectively solve the problems of reclosing and reclosing of a moving contact, the moving contact 1 and the fixed contact 2 are connected in a matched mode by a bolt, contact is better when the moving contact is at a high speed of Guan Gezha, contact resistance between the moving contact and the fixed contact is reduced, current carrying capacity of the high-speed switch is further improved, heating of the contact when the direct-current air circuit breaker is at a high speed of Guan Eding is reduced, and service life of the high-speed switch is effectively prolonged.
The high-speed switch structure for the direct-current air circuit breaker avoids rebound after the moving contact and the fixed contact are contacted, and enables the high-speed switch to be switched on with load. And the high-speed switch moving and static contact structure of the embodiment of the application is simpler, does not influence the integral structure of the existing high-speed switch, and is easy to assemble.
Further, the stationary contact 2 in the embodiment of the present application includes a plurality of stationary contact units 201 disposed side by side, as shown in fig. 1 to 3, the plurality of stationary contact units 201 are connected into a whole by a connecting rod, the connecting rod structure is not shown in the figure, specifically, a threaded rod may be disposed as the connecting rod to connect the plurality of stationary contact units 201 disposed side by side into a whole; each static contact unit 201 comprises a static contact body 2011 and a static contact spring 2012 obliquely hinged to one side of the static contact body 2011, a spring 3 is arranged between the static contact spring 2012 and the static contact body 2011, and a second inclined plane is arranged on the static contact spring 2012. A spring mounting hole may be provided on a side surface of the stationary contact body 2011, and one end of the spring 3 is fixed in the spring mounting hole.
Like this, the whole inclined plane that just constitutes by the fixed contact shell fragment 2012 of a plurality of side by side of second inclined plane of fixed contact 2 of this application embodiment, compare in the second inclined plane of integral structure, when passing through the inclined plane contact between moving contact 1 and fixed contact 2, the fixed contact shell fragment 2012 of a plurality of fixed contact units 201 of setting side by side can be better laminating contact with the first inclined plane of moving contact 1, further reduce the contact resistance between moving contact, and then the current-carrying capacity of reinforcing high-speed switch, and can further reduce the contact and generate heat when direct current air circuit breaker high-speed Guan Eding through-flow, effectively prolong high-speed switch's life.
Further, a plurality of stationary contact units 201 are disposed at intervals. The interval between two adjacent stationary contact units 201 may be 1-2mm. The plurality of static contact units 201 are arranged at intervals, so that a deformation space can be reserved for the thermal expansion and the cold contraction of the static contact units 201 on one hand; on the other hand, the conductive layers on the surfaces of the elastic pieces 2012 of different fixed contacts can be prevented from being adhered into a whole after being melted at a high temperature, and the normal use of the fixed contact and the fixed contact is ensured.
The first inclined plane of the moving contact 1 and the second inclined plane of the fixed contact 2 are both provided with the conducting strip 4, and the conducting strip 4 can be connected to the first inclined plane and the second inclined plane through welding. The conductive sheet 4 may be a silver sheet with good conductivity. The surface of each stationary contact spring 2012 is provided with a conductive sheet 4 as a conductive layer.
Further, the stationary contact body 2011 is provided with a hinged arc groove 20111, and one end of the stationary contact spring 2012 is provided with an arc rod 20121 which is matched with the hinged arc groove 20111 for hinging, as shown in fig. 4. When the moving contact and the static contact are in contact, after the static contact elastic sheet 2012 receives the extrusion force, the arc-shaped rod 20121 rotates in the arc-shaped groove 20111, so that the static contact elastic sheet 2012 rotates around one end of the static contact elastic sheet and moves in the horizontal direction under the action of the spring 3.
Further, the moving contact 1 is provided with a weight-reducing groove 101, as shown in fig. 1 and 5. Since the moving contact 1 needs to move in the vertical direction, the weight of the moving contact 1 can be reduced by providing the weight-reducing groove 101 on the moving contact 1, and the power output of the power mechanism can be reduced.
The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not thereby to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. The high-speed switch structure for the direct-current air circuit breaker is characterized by comprising a moving contact and fixed contacts symmetrically arranged on two sides of the moving contact; the two sides of the moving contact are provided with first inclined planes, the side surface of the fixed contact is provided with a second inclined plane which is in matched contact with the first inclined plane, and the first inclined plane and the second inclined plane are conductive;
one end of the first inclined plane is hinged to the movable contact, and an elastic piece is arranged between the first inclined plane and the side face of the movable contact; or one end of the second inclined plane is hinged to the static contact, and an elastic piece is arranged between the second inclined plane and the static contact.
2. The high-speed switching structure for a direct current air circuit breaker according to claim 1, wherein the stationary contact comprises a plurality of stationary contact units arranged side by side, the plurality of stationary contact units being integrally connected by a connecting rod; each static contact unit comprises a static contact body and a static contact spring piece obliquely hinged to one side of the static contact body, a spring is arranged between the static contact spring piece and the static contact body, and the static contact spring piece is provided with a second inclined plane.
3. The high-speed switching structure for a direct current air circuit breaker according to claim 2, wherein a plurality of the stationary contact units are disposed at intervals.
4. A high-speed switching structure for a direct current air circuit breaker according to claim 3, wherein the interval between adjacent two of said stationary contact units is 1-2mm.
5. The high-speed switch structure for a direct current air circuit breaker according to claim 2, wherein the fixed contact body is provided with a hinged arc groove, and one end of the fixed contact spring is provided with an arc rod which is matched and hinged with the hinged arc groove.
6. The high-speed switching structure for a direct current air circuit breaker according to claim 2, wherein the side surface of the stationary contact body is provided with a spring mounting hole.
7. The high-speed switching structure for a direct current air circuit breaker according to claim 1, wherein the first inclined surface and the second inclined surface are each provided with a conductive sheet.
8. The high-speed switching structure for a direct current air circuit breaker according to claim 7, wherein the conductive sheet is a silver sheet.
9. The high-speed switching structure for a direct current air circuit breaker according to claim 1, wherein the moving contact is provided with a weight-reducing groove.
10. The high-speed switching structure for a direct current air circuit breaker according to claim 1, wherein the moving contact is connected with a pull rod for connecting a power mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311417727.5A CN117594391A (en) | 2023-10-26 | 2023-10-26 | High-speed switch structure for direct-current air circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311417727.5A CN117594391A (en) | 2023-10-26 | 2023-10-26 | High-speed switch structure for direct-current air circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117594391A true CN117594391A (en) | 2024-02-23 |
Family
ID=89908964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311417727.5A Pending CN117594391A (en) | 2023-10-26 | 2023-10-26 | High-speed switch structure for direct-current air circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117594391A (en) |
-
2023
- 2023-10-26 CN CN202311417727.5A patent/CN117594391A/en active Pending
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