CN212934471U - Arc striking device of three-station load switch - Google Patents
Arc striking device of three-station load switch Download PDFInfo
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- CN212934471U CN212934471U CN202022275916.1U CN202022275916U CN212934471U CN 212934471 U CN212934471 U CN 212934471U CN 202022275916 U CN202022275916 U CN 202022275916U CN 212934471 U CN212934471 U CN 212934471U
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Abstract
The utility model discloses an arc striking device of a three-station load switch, which comprises a frame assembly, a moving contact arranged on the frame assembly, a static contact, a grounding contact, an arc isolating sleeve sleeved on the moving contact, and a first arc striking plate arranged on the side edge of one side of the static contact facing the moving contact, wherein the arc isolating sleeve and the first arc striking plate are arranged, when the moving contact is connected with or disconnected with the static contact, the arc isolating sleeve can firstly be in discharge contact with the first arc striking plate, so that electric arc is intensively generated between the arc isolating sleeve and the first arc striking plate, the moving contact and the static contact are prevented from being directly struck by electric arc, the arc isolating sleeve and the first arc striking plate play an arc striking role between the moving contact and the static contact, the electric arc generated between the moving contact and the static contact preferentially strikes the arc isolating sleeve and the first arc striking plate, thereby reducing the damage of the electric arc to the moving contact and the static contact, and avoiding the moving contact and the static contact from being struck by the electric arc, the service life of the load switch is prolonged, and the use is safe and reliable.
Description
Technical Field
The utility model relates to a load switch technical field, concretely relates to three station load switch's striking device.
Background
The three-position switch integrates the functions of an isolating switch and a grounding switch and is completed by a knife, so that mechanical locking can be realized, and the main loop is prevented from being electrified and being closed.
Chinese patent document CN203232840U discloses a three-position load switch, which includes a connecting block, a ground contact, and an upper fixed contact holder, where the upper fixed contact holder is provided with an upper fixed contact, one end of the connecting block is a lower fixed contact, the other end of the connecting block is a moving contact, a driving mechanism is connected to the connecting block, and the driving mechanism drives the moving contact of the connecting block to respectively contact with the ground contact or the upper fixed contact in different working states; the three-station load switch further comprises an upper static contact arc-extinguishing cover and an upper static contact arc-extinguishing cover fixing frame, wherein the upper static contact arc-extinguishing cover is installed on the upper static contact arc-extinguishing cover fixing frame, and the upper static contact arc-extinguishing cover fixing frame is connected with the upper static contact fixing frame.
The three-station load switch has the following problems that although the arc extinguishing cover of the upper static contact can extinguish the electric arc generated when the upper static contact is connected with or separated from the movable contact, the upper static contact and the movable contact are burnt when the electric arc is generated, and the movable contact and the upper static contact can be burnt out after long-term use, so that the load switch fails, and potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming load switch among the prior art's the electric arc that the static contact deciliter produced can the ignition move, the static contact, long-term the use leads to last static contact and movable contact to be burnt, makes load switch inefficacy, has the problem of potential safety hazard to provide one kind and can prevent electric arc ignition movable contact and static contact, improve load switch life, the high three-station load switch's of security arc starting device.
The utility model provides a three station load switch's arc 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 over, be provided with the striking structure between moving contact and static contact or the ground contact, the striking structure establishes including the cover the arc spacer on the moving contact is established with the setting the static contact is in towards the first striking piece on one side of moving contact the moving contact with the static contact joint or when dividing the branch, the arc spacer with discharge contact between the first striking piece.
In the arc striking device of the three-station load switch, the arc isolating sleeve is provided with an accommodating groove suitable for the moving contact to be inserted into, and the accommodating groove covers the end part and the outer side wall of the moving contact.
In the arc striking device of the three-station load switch, the accommodating groove is provided with a socket end extending to one end of the arc isolating sleeve and a closed end which is matched and abutted with one end of the moving contact inserted into the accommodating groove.
In the arc striking device of the three-station load switch, the moving contact comprises two moving contact plates which are oppositely arranged, one ends of the two moving contact plates are respectively sleeved with two arc isolating sleeves, and the two arc isolating sleeves are fixed on the outer walls of the two sides of the two moving contact plates through mounting structures.
In the arc striking device of the three-station load switch, the movable contact plate comprises a rotating end which is rotatably connected with the rack assembly and a contact end which clamps the static contact or the grounding contact, and the contact end is sleeved with a positioning notch corresponding to the arc isolation sleeve.
In the arc striking device of the three-station load switch, the mounting structure comprises a bolt penetrating between the two movable contact plates and the two arc isolating sleeves, a pressure spring sleeved on the bolt and abutted against the side surface of the arc isolating sleeve opposite to the movable contact plates, and a nut in threaded connection with the bolt, wherein the bolt extrudes the pressure spring when the nut is fastened.
In the arc striking device of the three-station load switch, the two movable contact plates and the two arc isolating sleeves are respectively and correspondingly provided with the mounting holes suitable for the bolts to pass through.
In the arc striking device of the three-station load switch, the first arc striking piece is a metal piece which is attached to and arranged on one side edge of the static contact.
In the arc striking device of the three-station load switch, the arc striking structure further comprises a second arc striking piece arranged on the grounding contact, and the second arc striking piece is a metal piece which is attached to the side edge of one side of the grounding contact, which is connected with the movable contact.
Compared with the prior art, the technical scheme of the utility model have the following advantage:
1. the utility model provides an arc striking device of three-station load switch, through set up the arc spacer on the movable contact, and in the static contact towards the first striking piece on one side of movable contact, when the movable contact is connected or divides the branch with the static contact, the arc spacer can first with first striking piece discharge contact, make electric arc concentrate to produce between arc spacer and the first striking piece, avoid electric arc direct firing the movable contact with the static contact, the benefit of this design lies in, arc spacer and the first striking play the striking effect between movable contact, static contact, make the electric arc that produces between movable contact and the static contact preferentially fire arc spacer and first striking piece to reduce the electric arc to the firing injury of movable contact and static contact, avoid the movable contact with the static contact is burnt by electric arc and is damaged, the service life of the load switch is prolonged, and the use is safe and reliable.
2. The utility model provides a three-station load switch's striking device, it is fit for to separate to be equipped with on the arc jacket moving contact male holding recess, through setting up the holding recess covers the tip and the lateral wall of moving contact make the electric arc of production can not burn the moving contact has improved the life 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 a front view of an arc striking device of a three-position load switch provided by the present invention;
fig. 2 is an exploded view of the movable contact shown in fig. 1;
description of reference numerals:
1-assembling a rack;
2-moving contact; 21-a movable touch plate; 22-a rotating end; 23-a contact end; 24-a positioning notch;
3, static contact;
4-a ground contact;
5-arc striking structure; 51-arc insulation sleeve; 52-first arc striking sheet; 53-accommodating grooves; 54-socket end; 55-closed end; 56-a second arc striking sheet;
6-mounting a structure; 61-bolt; 62-pressure spring; 63-a nut; 64-mounting holes;
7-arc extinguishing support; 71-arc chute pieces.
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 three station load switch's arc striking device as shown in fig. 1-2, 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, be provided with striking structure 5 between moving contact 2 and static contact 3 or the ground contact 4, striking structure 5 establishes including the cover the arc separation sleeve 51 on the moving contact 2, and set up static contact 3 is in towards the first striking piece 52 on the one side of moving contact 2 the moving contact 2 with when the static contact 3 joint or divide absolutely, arc separation sleeve 51 with discharge contact between the first striking piece 52.
The above-mentioned embodiment is a core technical solution of this embodiment, by sleeving the movable contact 2 with the arc isolating sleeve 51 and the first arc striking plate 52 on the side of the fixed contact 3 facing the movable contact 2, when the movable contact 2 is connected to or disconnected from the fixed contact 3, the arc isolating sleeve 51 will first make discharge contact with the first arc striking plate 52, so that the arc is concentrated between the arc isolating sleeve 51 and the first arc striking plate 52, and the movable contact 2 and the fixed contact 3 are prevented from being directly ignited by the arc, so that the design has the advantages that the arc isolating sleeve 51 and the first arc striking plate 52 play an arc striking role between the movable contact and the fixed contact, so that the arc generated between the movable contact 2 and the fixed contact 3 preferentially ignites the arc isolating sleeve 51 and the first arc striking plate 52, thereby reducing the damage of the arc to the movable contact 2 and the fixed contact 3, in this embodiment, the static contact 3 is provided with an arc extinguishing support 7 and a plurality of arc extinguishing grid pieces 71 arranged on the arc extinguishing support 7, and an arc generated when the moving contact 2 is connected with or disconnected from the static contact 3 can be quickly extinguished by the arc extinguishing grid pieces 71.
As a specific structure, the arc insulating sleeve 51 is provided with an accommodating groove 53 suitable for the insertion of the movable contact 2, and the accommodating groove 53 is arranged to cover the end portion and the outer side wall of the movable contact 2, so that the generated electric arc does not burn the movable contact 2, thereby prolonging the service life of the movable contact 2, and further, the accommodating groove 53 is provided with a socket end 54 extending to one end of the arc insulating sleeve 51 and a closed end 55 abutting against one end of the movable contact 2 inserted into the accommodating groove 53 in a matching manner, and the movable contact 2 is inserted into the accommodating groove 53 from the socket end 54 and abuts against the closed end 55, which means that the arc insulating sleeve 51 is installed in place, thereby realizing the rapid positioning and installation of the arc insulating sleeve 51.
As shown in fig. 2, the movable contact 2 includes two movable contact plates 21 arranged oppositely, one end of each of the two movable contact plates 21 is respectively sleeved with two arc isolating sleeves 51, so that the movable contact plate 21 and the static contact 3 or the grounding contact 4 can be protected by the arc isolating sleeves 51 when being disconnected or connected, and cannot be eroded by an arc, thereby enhancing the safety of the movable contact plate 21, and the two arc isolating sleeves 51 are fixed on the outer walls of two sides of the two movable contact plates 21 through a mounting structure 6 as a specific structural arrangement, the mounting structure 6 includes a bolt 61 penetrating between the two movable contact plates 21 and the two arc isolating sleeves 51, a compression spring 62 sleeved on the bolt 61 and abutting against the side of the arc isolating sleeve 51 facing away from the movable contact plate 21, and a nut 63 screwed on the bolt 61, the bolt 61 compresses the compression spring 62 when the nut 63 is fastened, the bolt 61 and the nut 63 are matched with each other to extrude the pressure spring 62, the movable contact plate 21 is in closer contact with the grounding contact 4 or the static contact 3 by utilizing the elasticity of the pressure spring 62, and meanwhile, the two arc isolating sleeves 51 are reliably and stably fastened on the side surfaces of the two movable contact plates 21, so that the matching and the fixation are reliable, and the installation stability is good.
As a specific structural arrangement, the movable contact plate 21 includes a rotating end 22 rotatably connected to the rack assembly 1, and a contact end 23 for clamping the static contact 3 or the ground contact 4, the contact end 23 is provided with a positioning notch 24 corresponding to the arc isolating sleeve 51, the arc isolating sleeve 51 is quickly mounted on the contact end 23 by setting the positioning notch 24, meanwhile, the two movable contact plates 21 and the two arc isolating sleeves 51 are respectively provided with mounting holes 64 suitable for the bolts 61 to pass through, when the arc isolating sleeve 51 is quickly mounted on the movable contact plate 21 through the positioning notch 24, the mounting holes 64 on the movable contact plate 21 and the mounting holes 64 on the arc isolating sleeve 51 are on the same straight line, so that the bolts 61 pass through the mounting holes and are conveniently matched and fastened with the nuts 63.
As shown in fig. 1, the first arc starting sheet 52 is a metal sheet attached to one side edge of the fixed contact 3, and the metal sheet is integrally formed or welded and fixed on the fixed contact 3.
As a specific structural arrangement, the arc ignition structure 5 further includes a second arc ignition sheet 56 disposed on the grounding contact 4, the second arc ignition sheet 56 is a metal sheet attached to one side edge of the grounding contact 4 joined to the moving contact 2, and by arranging the second arc ignition sheet 56 to cooperate with the arc isolating sleeve 51, when the moving contact 2 and the grounding contact 4 are in short circuit shutdown, the generated electric arc preferentially ignites the second arc ignition sheet 56 and the arc isolating sleeve 51, so as to reduce the ignition damage of the electric arc to the moving contact 2 and the grounding contact 4, improve the service life of the product, and ensure that the number of times of shutdown of the load switch in short circuit reaches more than 5 times of the specified requirements of the national power grid.
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 arc striking device of a three-station load switch comprises a frame assembly (1), a moving contact (2), a static contact (3) and a grounding 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 (5) is arranged between the moving contact (2) and the static contact (3) or the grounding contact (4), the arc striking structure (5) comprises an arc isolating sleeve (51) sleeved on the moving contact (2), and a first arc striking sheet (52) arranged on the side edge of one side of the static contact (3) facing the movable contact (2), when the moving contact (2) is jointed or disconnected with the static contact (3), the arc isolating sleeve (51) is in discharge contact with the first arc striking plate (52).
2. The arc striking device of the three-position load switch according to claim 1, wherein the arc isolation sleeve (51) is provided with a containing groove (53) suitable for the moving contact (2) to be inserted into, and the containing groove (53) covers the end part and the outer side wall of the moving contact (2).
3. The arc striking device of the three-position load switch according to claim 2, wherein the accommodating groove (53) is provided with a socket end (54) extending to one end of the arc isolating sleeve (51) and a closed end (55) which is matched and abutted with one end of the movable contact (2) inserted into the accommodating groove (53).
4. The arc striking device of the three-position load switch according to claim 1, wherein the moving contact (2) comprises two moving contact plates (21) which are arranged oppositely, one end of each of the two moving contact plates (21) is respectively sleeved with two arc isolating sleeves (51), and the two arc isolating sleeves (51) are fixed on the outer walls of the two sides of the two moving contact plates (21) through mounting structures (6).
5. The arc striking device of the three-position load switch according to claim 4, wherein the movable contact plate (21) comprises a rotating end (22) rotatably connected with the rack assembly (1) and a contact end (23) for clamping the static contact (3) or the grounding contact (4), and the contact end (23) is provided with a positioning notch (24) corresponding to the arc isolating sleeve (51).
6. The arc striking device of the three-position load switch according to claim 5, wherein the mounting structure (6) comprises a bolt (61) penetrating between the two movable contact plates (21) and the two arc spacers (51), a pressure spring (62) sleeved on the bolt (61) and abutted against the side surface of the arc spacers (51) facing away from the movable contact plates (21), and a nut (63) in threaded connection with the bolt (61), and the bolt (61) presses the pressure spring (62) when the nut (63) is fastened.
7. The arc striking device of the three-position load switch according to claim 6, wherein the two movable contact plates (21) and the two arc isolating sleeves (51) are respectively provided with a mounting hole (64) suitable for the bolt (61) to pass through.
8. The arc striking device of the three-position load switch according to any one of claims 1 to 7, wherein the first arc striking plate (52) is a metal plate which is attached to one side edge of the fixed contact (3).
9. The arc striking device of the three-position load switch according to claim 8, wherein the arc striking structure (5) further comprises a second arc striking piece (56) arranged on the grounding contact (4), and the second arc striking piece (56) is a metal piece attached to one side edge of the grounding contact (4) connected with the movable contact (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022275916.1U CN212934471U (en) | 2020-10-13 | 2020-10-13 | Arc striking device of three-station load switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022275916.1U CN212934471U (en) | 2020-10-13 | 2020-10-13 | Arc striking device of three-station load switch |
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| Publication Number | Publication Date |
|---|---|
| CN212934471U true CN212934471U (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022275916.1U Active CN212934471U (en) | 2020-10-13 | 2020-10-13 | Arc striking device of three-station load switch |
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| CN (1) | CN212934471U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114420477A (en) * | 2021-12-31 | 2022-04-29 | 深圳市泰永电气科技有限公司 | Rotating mechanism, change-over switch device and automatic change-over switch electric appliance |
-
2020
- 2020-10-13 CN CN202022275916.1U patent/CN212934471U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114420477A (en) * | 2021-12-31 | 2022-04-29 | 深圳市泰永电气科技有限公司 | Rotating mechanism, change-over switch device and automatic change-over switch electric appliance |
| CN114420477B (en) * | 2021-12-31 | 2024-04-05 | 深圳市泰永电气科技有限公司 | Rotary mechanism, change-over switch device and automatic change-over switch electric appliance |
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