CN210925850U - Isolating switch with arc striking device - Google Patents
Isolating switch with arc striking device Download PDFInfo
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- CN210925850U CN210925850U CN201922276896.7U CN201922276896U CN210925850U CN 210925850 U CN210925850 U CN 210925850U CN 201922276896 U CN201922276896 U CN 201922276896U CN 210925850 U CN210925850 U CN 210925850U
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Abstract
The application discloses isolator with arc striking device is applicable to flexible direct current transmission system, including moving contact, static contact and arc striking device, the arc striking device includes: the first arc striking piece is arranged on the moving contact and is arranged in a protruding mode relative to the moving contact, and the protruding direction of the first arc striking piece is the direction close to the fixed contact; and the second arc striking piece is arranged on the static contact in a protruding way relative to the static contact, and the protruding direction of the second arc striking piece is the direction close to the first arc striking piece, so that the distance between the first arc striking piece and the second arc striking piece is smaller than the distance between the movable contact and the static contact when the movable contact and the static contact are not in contact. The isolating switch with the arc striking device can be suitable for a flexible direct-current power transmission system, can also avoid the ablation of an electric arc to a contact, and prolongs the service life of the isolating switch.
Description
Technical Field
The utility model relates to an electrical equipment technical field, in particular to isolator with striking device.
Background
With the development of the technology and the increase of the application demand, the direct current transmission technology gradually develops towards the direction of multi-terminal and networking, and flexible direct current transmission becomes a brand new transmission mode. The condition that an isolating switch needs to be used exists in a flexible direct current transmission system, however, the existing isolating switch is generally only suitable for an alternating current transmission system, the existing isolating switch cannot be used in the flexible direct current transmission system, and the problem that an electric arc ablates a contact exists, so that the service life of the isolating switch is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a isolator with striking device, it can be applicable to flexible direct current transmission system to can also avoid the ablation of electric arc to the contact, prolonged isolator's life.
In order to achieve the above object, the utility model provides a following technical scheme:
an isolator with an arc striking device is suitable for a flexible direct current transmission system and comprises a moving contact, a fixed contact and the arc striking device, wherein the arc striking device comprises:
the first arc striking piece is arranged on the movable contact and is arranged in a protruding mode relative to the movable contact, and the protruding direction of the first arc striking piece is the direction close to the fixed contact;
and the second arc striking piece is arranged on the fixed contact in a protruding mode relative to the fixed contact, and the protruding direction of the second arc striking piece is the direction close to the first arc striking piece, so that the distance between the first arc striking piece and the second arc striking piece is smaller than the distance between the movable contact and the fixed contact in the state that the movable contact and the fixed contact are not in contact.
Preferably, in the isolating switch with the arc striking device, a horizontal center line of the moving contact coincides with a horizontal center line of the static contact, and on a horizontal plane, the first arc striking piece and the second arc striking piece are both arranged obliquely relative to the horizontal center line, and the first arc striking piece and the second arc striking piece are located on the same side of the horizontal center line.
Preferably, the isolating switch with the arc striking device further comprises a third arc striking piece, the third arc striking piece is arranged at the arc striking end of the second arc striking piece, and the arc striking end is the end, close to the first arc striking piece, of the second arc striking piece.
Preferably, in the isolating switch with the arc striking device, the other end of the second arc striking piece is connected to the top or the bottom of the static contact, and the second arc striking piece is a bending rod bent towards the first arc striking piece.
Preferably, in the disconnecting switch with an arc striking device, the third arc striking member is a ball.
Preferably, in the disconnecting switch with an arc ignition device, the first arc ignition member is a plate-shaped member.
Preferably, in the disconnecting switch with the arc striking device, an acute angle between the first arc striking member and the horizontal center line is smaller than 90, and an acute angle between the second arc striking member and the horizontal center line is smaller than 90.
Preferably, in the disconnecting switch with the arc striking device, an acute angle between the first arc striking part and the horizontal center line is 45 degrees, and an acute angle between the second arc striking part and the horizontal center line is 10 degrees.
Preferably, in the isolating switch with the arc ignition device, the first arc ignition part, the second arc ignition part and the third arc ignition part are made of copper-tungsten alloy or chromium-zirconium-copper.
The utility model provides an isolator with arc ignition device, through at the moving contact, set up first striking spare and second striking spare on the stationary contact respectively, and make first striking spare and second striking spare bulge for moving contact and static contact respectively, with under the state that moving contact and static contact do not contact, can make the interval between first striking spare and the second striking spare be less than the interval between moving contact and the static contact, thereby when isolator combined floodgate, make the insulating clearance between moving contact and static contact be greater than the breakdown clearance of striking device, guarantee that the striking device reaches the breakdown distance earlier than the main contact (this main contact is the general name of moving contact and static contact), make electric arc only produce between the first striking spare and the second striking spare of striking device, make isolator can close index current (I ═ 2.5e-t/0.03sin (180 pi ×) kA) and can protect again the main contact not ablated, it can be applicable to the isolator, can enough be applicable to flexible direct current transmission system again, can avoid the life-span of isolator to main contact again, the life-service life of isolator has been prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a front view of a moving contact, a fixed contact, a first arc striking member, a second arc striking member, and a third arc striking member in an isolating switch according to an embodiment of the present invention;
fig. 2 is a top view of fig. 1.
In fig. 1 and 2:
1-moving contact, 2-static contact, 3-first arc striking component, 4-second arc striking component, 5-third arc striking component and 6-horizontal central line.
Detailed Description
The utility model provides a isolator with striking device, it can be applicable to flexible direct current transmission system to can also avoid electric arc to the ablation of contact, prolonged isolator's life.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 and fig. 2, the embodiment of the utility model provides an isolator with arc ignition device, it is applicable to flexible direct current transmission system to mainly include moving contact 1, static contact 2 (this moving contact 1 and static contact 2 are moving contact 1, static contact 2 among the prior art) and arc ignition device, wherein, the arc ignition device includes again: the first arc striking component 3 is arranged on the movable contact 1, the first arc striking component 3 is arranged in a protruding mode relative to the movable contact 1, and the protruding direction of the first arc striking component 3 is the direction close to the fixed contact 2, namely the first arc striking component 3 protrudes towards the direction where the fixed contact 2 is located; the second arc striking part 4 is arranged on the static contact 2, the second arc striking part 4 is also arranged in a protruding mode relative to the static contact 2, the protruding direction of the second arc striking part 4 is the direction close to the first arc striking part 3, namely the second arc striking part 4 protrudes towards the direction where the first arc striking part 3 is located, and the distance between the first arc striking part 3 and the second arc striking part 4 can be smaller than the distance between the moving contact 1 and the static contact 2 in the non-contact state (namely the non-closing state of the isolating switch) of the moving contact 1 and the static contact 2 through the mutual close arrangement of the first arc striking part 3 and the second arc striking part 4.
In the process of closing the isolating switch, the moving contact 1 moves horizontally towards the direction of the static contact 2, the first arc striking part 3 on the moving contact 1 approaches to the second arc striking part 4 on the static contact 2, when the distance between the first arc striking part 3 and the second arc striking part 4 reaches the breakdown distance, the distance between the moving contact 1 and the static contact 2 is still larger than the breakdown distance, namely the distance between the first arc striking part 3 and the second arc striking part 4 is smaller than the distance between other parts of the isolating switch, the arc striking device breaks down before the main contact, and at the moment, electric arcs generated by current and voltage are applied to the first arc striking part 3 and the second arc striking part 4, so that the generation of electric arcs between the moving contact 1 and the static contact 2 is avoided, and the main contact is protected. Then, with the continuous closing of the isolating switch, the current is rapidly attenuated to zero, and the electric arc is extinguished.
In this embodiment, as shown in fig. 2, it is preferable that the horizontal center line 6 of the moving contact 1 coincides with the horizontal center line 6 of the static contact 2, and on a horizontal plane, both the first arc ignition member 3 and the second arc ignition member 4 are disposed obliquely with respect to the horizontal center line 6, and the first arc ignition member 3 and the second arc ignition member 4 are located on the same side of the horizontal center line 6. The first arc striking piece 3 and the second arc striking piece 4 are obliquely arranged relative to the main contact, so that the influence on the normal work of the main contact due to the additional arrangement of the arc striking device can be reduced as much as possible, and the interference of the arc striking device on the main contact is avoided. The first arc striking part 3 and the second arc striking part 4 are inclined to the same side relative to the horizontal center line 6, so that the distance between the first arc striking part 3 and the second arc striking part 4 is smaller than the distance between the movable contact 1 and the fixed contact 2, and an electric arc is generated between the first arc striking part 3 and the second arc striking part 4. Furthermore, in the absence of interference problems, the first arc ignition element 3 and the second arc ignition element 4 may not be inclined with respect to the horizontal center line 6, but may coincide with the horizontal center line 6.
Further, the disconnector provided in this embodiment preferably further comprises a third arc-striking member 5, as shown in fig. 1 and 2, wherein the third arc-striking member 5 is disposed at an arc-striking end of the second arc-striking member 4, the arc-striking end being an end of the second arc-striking member 4 close to the first arc-striking member 3. The third arc striking part 5 is additionally arranged on the basis of the first arc striking part 3 and the second arc striking part 4, so that electric arcs can be better ensured to be generated on an arc striking device, and the main contact can be better ensured to be ablated.
Preferably, the other end of the second arc-striking member 4 is connected to the top or bottom of the stationary contact 2, and the second arc-striking member 4 is a bent rod bent toward the first arc-striking member 3, as shown in fig. 1 and 2. In this embodiment, in order to avoid the second arc initiation piece 4 from affecting the normal operation of the static contact 2, the second arc initiation piece 4 needs to be connected to the top or the bottom of the static contact 2, and in this embodiment, it is preferably arranged on the top of the static contact 2 as shown in fig. 1 and 2. In order to further reduce the distance between the first arc-striking part 3 and the second arc-striking part 4, the second arc-striking part 4 is a rod-shaped part and is bent towards the direction of the first arc-striking part 3 (relative to the static contact 2, the position of the first arc-striking part 3 is located in the middle of the static contact 2, as shown in fig. 1, the bend is bent from the top or the bottom of the static contact 2 towards the middle thereof, as shown in fig. 1), so that the arc-striking end of the second arc-striking part 4 is closer to the first arc-striking part 3, and thus the generation of an arc between the first arc-striking part 3 and the second arc-striking part 4 is more reliably ensured.
As shown in fig. 1 and 2, the third arc ignition element 5 is preferably a ball. The third arc striking part 5 is preferably a spherical part because the spherical structure can reduce the field intensity of the electric arc, accelerate the disappearance of the electric arc and better protect the main contact. In addition, the first arc ignition member 3 of the present embodiment is preferably a plate-like member, as shown in fig. 1 and 2, to better ensure the generation of the arc on the arc ignition device.
On the basis of the included angles between the first arc striking piece 3 and the horizontal center line 6 and between the second arc striking piece 4 and the horizontal center line 6, the acute included angle α between the first arc striking piece 3 and the horizontal center line 6 is preferably smaller than 90, and similarly, the acute included angle β between the second arc striking piece 4 and the horizontal center line 6 is also smaller than 90, as shown in fig. 1 and fig. 2.
By adopting the structure and the arrangement positions of the first arc striking part 3, the second arc striking part 4 and the third arc striking part 5 relative to the moving contact 1 and the static contact 2, the isolating switch provided by the embodiment can be suitable for the use of a flexible direct-current power transmission system.
In addition, in this embodiment, the first arc ignition member 3, the second arc ignition member 4 and the third arc ignition member 5 are preferably made of copper-tungsten alloy or chromium-zirconium-copper. This material has not only good conductivity but also good ablation resistance, and can maintain operation for a longer period of time, and the isolator has a longer life, so it is preferable in this embodiment.
In the present specification, the structures of the respective portions are described in a progressive manner, the structure of each portion is mainly described as different from the existing structure, and the whole and partial structures of the disconnecting switch can be obtained by combining the structures of the portions.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. An isolator with an arc striking device is suitable for a flexible direct current transmission system and is characterized by comprising a moving contact, a static contact and the arc striking device, wherein the arc striking device comprises:
the first arc striking piece is arranged on the movable contact and is arranged in a protruding mode relative to the movable contact, and the protruding direction of the first arc striking piece is the direction close to the fixed contact;
and the second arc striking piece is arranged on the fixed contact in a protruding mode relative to the fixed contact, and the protruding direction of the second arc striking piece is the direction close to the first arc striking piece, so that the distance between the first arc striking piece and the second arc striking piece is smaller than the distance between the movable contact and the fixed contact in the state that the movable contact and the fixed contact are not in contact.
2. The disconnecting switch with the arc striking device according to claim 1, wherein a horizontal center line of the movable contact coincides with a horizontal center line of the stationary contact, and in a horizontal plane, the first arc striking member and the second arc striking member are both disposed obliquely with respect to the horizontal center line, and the first arc striking member and the second arc striking member are located on the same side of the horizontal center line.
3. The disconnector with arc ignition device according to claim 1, further comprising a third arc ignition member disposed at an arc ignition end of the second arc ignition member, the arc ignition end being an end of the second arc ignition member close to the first arc ignition member.
4. The isolating switch with the arc ignition device as claimed in claim 3, wherein the other end of the second arc ignition member is connected to the top or bottom of the stationary contact, and the second arc ignition member is a bent rod bent toward the first arc ignition member.
5. The disconnector with ignition device of claim 3, wherein the third ignition member is a ball.
6. The disconnector with ignition device of claim 3, characterized in that the first ignition member is a plate-like member.
7. The disconnector with ignition device of claim 2, wherein the acute angle between the first ignition element and the horizontal center line is less than 90, and the acute angle between the second ignition element and the horizontal center line is less than 90.
8. The disconnector with ignition device of claim 7, wherein the acute angle between the first ignition part and the horizontal center line is 45 degrees, and the acute angle between the second ignition part and the horizontal center line is 10 degrees.
9. The disconnector with arc ignition device of claim 3, wherein the first arc ignition member, the second arc ignition member and the third arc ignition member are made of copper-tungsten alloy or chromium-zirconium-copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922276896.7U CN210925850U (en) | 2019-12-17 | 2019-12-17 | Isolating switch with arc striking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922276896.7U CN210925850U (en) | 2019-12-17 | 2019-12-17 | Isolating switch with arc striking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210925850U true CN210925850U (en) | 2020-07-03 |
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ID=71368915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922276896.7U Active CN210925850U (en) | 2019-12-17 | 2019-12-17 | Isolating switch with arc striking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210925850U (en) |
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2019
- 2019-12-17 CN CN201922276896.7U patent/CN210925850U/en active Active
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