CN212934470U - Grounding arc striking device of isolating switch - Google Patents
Grounding arc striking device of isolating switch Download PDFInfo
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- CN212934470U CN212934470U CN202022275644.5U CN202022275644U CN212934470U CN 212934470 U CN212934470 U CN 212934470U CN 202022275644 U CN202022275644 U CN 202022275644U CN 212934470 U CN212934470 U CN 212934470U
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Abstract
The utility model discloses a grounding arc striking device of an isolating switch, which comprises a frame assembly, a moving contact, a static contact, a grounding contact, a conducting ring and an arc striking rod, wherein the moving contact, the static contact and the grounding contact are arranged on the frame assembly, the conducting ring is fixed on two sides of the moving contact, the arc striking rod is arranged on two sides of the grounding contact, under the condition of short circuit closing of the isolating switch, when the moving contact rotates to be close to the grounding contact, the conducting ring can firstly be in discharge contact with the arc striking rod, so that electric arcs are intensively generated between the conducting ring and the arc striking rod, the direct burning of the electric arcs on the moving contact and the grounding contact is avoided, the advantage of the design is that the electric arcs generated when the moving contact and the grounding contact are closed by short circuit preferentially burn the conducting ring and the arc striking rod, the burning damage of the electric arcs on the moving contact and the grounding contact is reduced, the service life, the regulation requirement of national power grid is met.
Description
Technical Field
The utility model relates to an isolator technical field, concretely relates to isolator's ground connection striking device.
Background
The isolating switch is generally a high-voltage isolating switch, is the electrical appliance which is used most in high-voltage switching electrical appliances, has a simple working principle and structure, but has high requirements on working reliability due to large usage amount, and has great influence on design, establishment and safe operation of a substation and a power plant. The national power grid now requires that the number of times of short circuit closing of the disconnecting switch at least reaches more than 5 times, but when the switch of the existing disconnecting switch is in short circuit, a moving contact and a grounding contact can generate high-temperature electric arc in the process of jointing, the electric arc can burn the moving contact and the grounding contact, the moving contact and the grounding contact can be burnt out in serious conditions, the circuit cannot be grounded safely, and potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming isolator among the prior art and producing high temperature electric arc and can firing moving contact and ground contact when the short circuit closes, influences product life, has the problem of potential safety hazard to provide one kind and can avoid electric arc directly to fire moving contact and ground contact, the security is good, isolator's ground connection arc ignition device that product life is high.
The utility model provides an isolator's ground connection striking device, be in including frame assembly with the setting moving contact, static contact and ground contact on the frame assembly, the moving contact can the static contact with rotate between the ground contact and switch, the moving contact with be equipped with the striking structure between the ground contact, the striking structure is including fixing the conducting ring of moving contact both sides is in with the setting the striking stick of ground contact both sides, when having short-circuit current the moving contact is to being close to when ground contact rotated, the conducting ring is in the moving contact with before the ground contact joint with the striking stick discharge contact.
In the grounding arc-striking device of the isolating switch, the arc-striking rod and the conducting ring are arranged in a staggered manner, and when the moving contact is connected with the grounding contact, the conducting ring is connected to one side of the arc-striking rod in an attaching manner.
In the grounding arc-striking device of the isolating switch, the conducting ring is fixed on the side walls of the two sides of the moving contact through a bolt structure.
In the grounding arc-striking device of the isolating switch, the bolt structure comprises two disc springs respectively arranged at one ends of the two conducting rings, which are opposite to the moving contact, bolts penetrating through two sides of the moving contact and connected between the two conducting rings and the two disc springs in a penetrating manner, and nuts connected to the bolts in a threaded manner and used for extruding the disc springs.
In the above-mentioned earthing arc-striking device for the isolating switch, the conducting ring is in a cylindrical structure, an accommodating groove capable of accommodating the disc spring and the nut is formed in the conducting ring, and the bolt penetrates into the accommodating groove along the axial direction of the conducting ring.
In the above-mentioned grounding arc-striking device for the isolating switch, a through hole communicated with the accommodating groove is formed at the other end of the conducting ring.
In the above-mentioned earthing arc-striking device for the isolating switch, one end of the conducting ring close to the arc-striking rod is provided with a layer of arc-resisting material.
In the above-mentioned grounding arc-striking device for the isolating switch, the arc-striking rod is a metal rod, and the arc-striking rod and the grounding contact are fixed on the rack assembly through a mounting plate.
In the grounding arc-striking device of the isolating switch, the moving contact is of a clamping plate structure and comprises a rotating end and a contact end, wherein the rotating end is rotatably connected with the rack assembly, the contact end clamps the static contact or the grounding contact, and the conducting rings are arranged on the side walls of two sides of the contact end.
Compared with the prior art, the technical scheme of the utility model have the following advantage:
1. the grounding arc striking device of the isolating switch provided by the utility model is characterized in that the conducting rings are arranged on the two sides of the moving contact, and the arc striking rods are arranged on the two sides of the grounding contact correspondingly, when the isolating switch is closed in a short circuit, when the movable contact rotates to be close to the grounding contact, the conducting ring is firstly in discharge contact with the arc striking rod, so that electric arcs are intensively generated between the conducting ring and the arc striking rod, the moving contact and the grounding contact are prevented from being directly burnt by the electric arcs, the design has the advantages that the electric arc generated by the moving contact and the grounding contact when the short circuit is closed preferentially burns the conducting ring and the arc striking rod, reduces the burning damage of the electric arc to the moving contact and the grounding contact, prolongs the service life of the product, the number of times of closing and closing the short circuit of the isolating switch can be improved to more than 5 times, and the specified requirements of a national power grid are met.
2. The utility model provides an isolator's ground connection striking device, through set up on the conducting ring the holding recess makes the bolt the nut with the dish spring all holding is in the holding recess, avoid bolted construction receives electric arc erosion, guarantees bolted construction ability safety and stability will the conducting ring fastening is in the both sides of moving contact.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below.
Fig. 1 is an installation schematic diagram of a grounding arc striking device of an isolating switch provided by the present invention;
fig. 2 is a top view of the grounding arc-striking device of the isolating switch provided by the present invention;
fig. 3 is an exploded view of the movable contact shown in fig. 2;
description of reference numerals:
1-assembling a rack;
2-moving contact; 21-a conductive ring; 22-arc resistant material; 23-a rotating end; 24-a contact end; 25-accommodating grooves;
3, static contact;
4-a ground contact; 41-arc striking rod; 42-a mounting plate;
5-bolt structure; 51-disc spring; 52-bolt; 53-nut.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example 1
The present embodiment is described in detail below with reference to the accompanying drawings:
the utility model provides a disconnector's ground connection striking device as shown in fig. 1-3, be in including frame assembly 1 with the setting moving contact 2, static contact 3 and ground contact 4 on the frame assembly 1, moving contact 2 can static contact 3 with rotate between the ground contact 4 and switch, moving contact 2 with be equipped with the striking structure between the ground contact 4, the striking structure is including fixing the conducting ring 21 of moving contact 2 both sides is in with the setting the striking stick 41 of ground contact 4 both sides, when having short-circuit current the moving contact 2 is to being close to when ground contact 4 rotates, conducting ring 21 is in moving contact 2 with before the ground contact 4 joint with striking stick 41 discharge contact.
The above embodiment is the core technical solution of this embodiment, by disposing the conducting rings 21 on two sides of the moving contact 2 and disposing the arc striking rods 41 on two sides of the grounding contact 4 correspondingly, under the condition of short circuit closing of the isolating switch, when the moving contact 2 rotates toward the position close to the grounding contact 4, the conducting rings 21 will first make discharge contact with the arc striking rods 41, so that the arc is concentrated between the conducting rings 21 and the arc striking rods 41, and the arc is prevented from directly burning the moving contact 2 and the grounding contact 4, so that the advantage of the design is that the arc generated when the moving contact 2 and the grounding contact 4 are closed in short circuit preferentially burns the conducting rings 21 and the arc striking rods 41, thereby reducing the burning damage of the arc to the moving contact 2 and the grounding contact 4, improving the service life of the product, and ensuring that the number of short circuit closing of the isolating switch is increased to more than 5 times, the regulation requirement of national power grid is met.
As a specific structure, the arc striking rod 41 and the conductive ring 21 are arranged in a staggered manner, and when the movable contact 2 is engaged with the ground contact 4, the conductive ring 21 is attached to one side of the arc striking rod 41. In the short circuit closing process of the movable contact 2 and the grounding contact 4, when the conductive ring 21 and the arc striking rod 41 reach a certain distance, an electric arc is generated until the side walls of the conductive ring 21 and the arc striking rod 41 are attached to each other, short circuit current is conducted and grounded from the movable contact 2 through the arc striking rod 41, and finally the movable contact 2 and the grounding contact 4 are connected to each other.
As shown in fig. 3, the conductive rings 21 are fixed on the sidewalls of the two sides of the movable contact 2 by a bolt structure 5, and the bolt structure 5 further includes two disc springs 51 respectively disposed at one ends of the two conductive rings 21 facing away from the movable contact 2, a bolt 52 penetrating through two sides of the movable contact 2 and penetrating between the two conductive rings 21 and the two disc springs 51, and a nut 53 screwed on the bolt 52 and pressing the disc spring 51, the disc spring 51 is pressed by the bolt 52 and the nut 53 in cooperation with each other, and the movable contact 2 is more tightly contacted with the grounding contact 4 or the stationary contact 3 by the elastic force of the disc spring 51.
The specific structural arrangement of the conductive ring 21 will be described in detail with reference to fig. 2 and 3:
the conductive ring 21 is a cylindrical structure, and has a receiving groove 25 for receiving the disc spring 51 and the nut 53, the bolt 52 is inserted into the receiving groove 25 along the axial direction of the conductive ring 21, this arrangement, with the bolt 52, the nut 53 and the disc spring 51 all fitted in the receiving recess 25, prevents the bolt structure 5 from being eroded by the arc, meanwhile, the other end of the conductive ring 21 is provided with a through hole communicated with the accommodating groove 25, the bolt 52 can pass through the through hole to be matched and fastened with the nut 53, so that the conductive ring 21 and the movable contact 2 can be quickly installed and positioned, the fastened bolt 52 and nut 53 apply extrusion force to the disc spring 51, therefore, the two conducting rings 21 are reliably and stably fastened on the two sides of the moving contact 2, and are reliably matched and fixed, and the installation stability is good.
As shown in fig. 3, one end of the conductive ring 21 close to the arc striking rod 41 is provided with a layer of arc-resistant material 22, the arc-resistant material is an arc burning-resistant material, the conductive ring 21 and the arc generated between the arc striking rod 41 will burn the arc-resistant material 22 first, so that the high-temperature-resistant and arc-resistant performance of the conductive ring 21 is improved, and the service life of the conductive ring 21 is prolonged.
As a concrete structure setting, the striking stick 41 is the metal rod, its with the ground contact 4 passes through mounting panel 42 to be fixed on the frame assembly 1, be equipped with the screw hole on the mounting panel 42, the one end tip of striking stick 41 is equipped with the screw thread, the direct threaded connection of striking stick 41 in on the mounting panel 42, simple to operate is swift.
As shown in fig. 3, the movable contact 2 is a clamping plate structure, and includes a rotating end 23 rotatably connected to the frame assembly 1, and a contact end 24 for clamping the fixed contact 3 or the ground contact 4, the conductive ring 21 is disposed on the side walls of the two sides of the contact end 24, the contact end 24 can be in close contact with the fixed contact 3 or the ground contact 4 under the squeezing action of the disc spring 51, and meanwhile, when the movable contact 2 is in a short circuit, the conductive ring 21 and the arc striking rod 41 are in discharge contact, so that the contact end 24 is prevented from being burned by an electric arc, and the safety of the isolating switch is improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (9)
1. An earthing arc-striking device of an isolating switch comprises a frame assembly (1), a moving contact (2), a static contact (3) and an earthing contact (4) which are arranged on the frame assembly (1), the moving contact (2) can be switched between the fixed contact (3) and the grounding contact (4) in a rotating way, the method is characterized in that: an arc striking structure is arranged between the moving contact (2) and the grounding contact (4), the arc striking structure comprises conductive rings (21) fixed on two sides of the moving contact (2) and arc striking rods (41) arranged on two sides of the grounding contact (4), when the moving contact (2) with short-circuit current rotates to be close to the grounding contact (4), the conductive ring (21) is in discharge contact with the arc ignition bar (41) before the movable contact (2) is joined with the grounding contact (4).
2. The grounding arc-striking device of the isolating switch according to claim 1, characterized in that the arc-striking rod (41) and the conductive ring (21) are arranged in a staggered manner, and when the movable contact (2) is jointed with the grounding contact (4), the conductive ring (21) is jointed and connected to one side of the arc-striking rod (41).
3. The grounding arc-striking device of the isolating switch of claim 2, characterized in that the conductive ring (21) is fixed on the two side walls of the moving contact (2) through a bolt structure (5).
4. The grounding arc-striking device of the isolating switch according to claim 3, characterized in that the bolt structure (5) comprises two disc springs (51) respectively arranged at one ends of the two conductive rings (21) opposite to the movable contact (2), a bolt (52) penetrating through two sides of the movable contact (2) and penetrating between the two conductive rings (21) and the two disc springs (51), and a nut (53) screwed on the bolt (52) and pressing the disc springs (51).
5. The grounding arc-striking device of the isolating switch according to claim 4, characterized in that the conductive ring (21) is a cylinder structure, and is provided with a receiving groove (25) capable of receiving the disc spring (51) and the nut (53), and the bolt (52) penetrates into the receiving groove (25) along the axial direction of the conductive ring (21).
6. The grounding arc-striking device of the isolating switch of claim 5, characterized in that the other end of the conductive ring (21) is provided with a through hole communicated with the accommodating groove (25).
7. The grounding arc-striking device of the isolating switch according to any one of the claims 1 to 6, characterized in that one end of the conductive ring (21) close to the arc-striking rod (41) is provided with a layer of arc-resistant material (22).
8. The grounding arc-striking device of the isolating switch according to claim 7, characterized in that the arc-striking rod (41) is a metal rod which is fixed on the rack assembly (1) together with the grounding contact (4) through a mounting plate (42).
9. The grounding arc-striking device of the isolating switch according to claim 1, characterized in that the moving contact (2) is of a clamping plate structure and comprises a rotating end (23) which is rotatably connected with the rack assembly (1) and a contact end (24) which clamps the static contact (3) or the grounding contact (4), and the conducting rings (21) are arranged on the side walls of the two sides of the contact end (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022275644.5U CN212934470U (en) | 2020-10-13 | 2020-10-13 | Grounding arc striking device of isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022275644.5U CN212934470U (en) | 2020-10-13 | 2020-10-13 | Grounding arc striking device of isolating switch |
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| Publication Number | Publication Date |
|---|---|
| CN212934470U true CN212934470U (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022275644.5U Active CN212934470U (en) | 2020-10-13 | 2020-10-13 | Grounding arc striking device of isolating switch |
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| Country | Link |
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| CN (1) | CN212934470U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097004A (en) * | 2021-05-12 | 2021-07-09 | 国网河北省电力有限公司晋州市供电分公司 | Residual electricity discharging device of high-voltage isolating switch |
| CN117059428A (en) * | 2023-08-24 | 2023-11-14 | 北京清畅电力技术股份有限公司 | High-voltage load switch adopting magnetic blowing combined type arc extinguishing |
-
2020
- 2020-10-13 CN CN202022275644.5U patent/CN212934470U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097004A (en) * | 2021-05-12 | 2021-07-09 | 国网河北省电力有限公司晋州市供电分公司 | Residual electricity discharging device of high-voltage isolating switch |
| CN117059428A (en) * | 2023-08-24 | 2023-11-14 | 北京清畅电力技术股份有限公司 | High-voltage load switch adopting magnetic blowing combined type arc extinguishing |
| CN117059428B (en) * | 2023-08-24 | 2024-03-19 | 北京清畅电力技术股份有限公司 | High-voltage load switch adopting magnetic blow-out combined type arc extinction |
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