CN220341105U - Grounding static contact structure and grounding switch - Google Patents
Grounding static contact structure and grounding switch Download PDFInfo
- Publication number
- CN220341105U CN220341105U CN202322037581.3U CN202322037581U CN220341105U CN 220341105 U CN220341105 U CN 220341105U CN 202322037581 U CN202322037581 U CN 202322037581U CN 220341105 U CN220341105 U CN 220341105U
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- Prior art keywords
- grounding
- arc
- static contact
- grounding static
- contact structure
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- 230000003068 static effect Effects 0.000 title claims abstract description 55
- 239000012212 insulator Substances 0.000 claims description 5
- 238000010891 electric arc Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- Elimination Of Static Electricity (AREA)
Abstract
The utility model discloses a grounding fixed contact structure and a grounding switch, wherein the grounding fixed contact structure comprises a grounding fixed contact fixed on a bracket and an arc suction sheet, wherein the arc suction sheet is positioned on the side surface of the grounding fixed contact, and the highest point of the arc suction sheet is higher than the highest point of the grounding fixed contact; the utility model has the advantage that the connection part of the grounding closing anti-stop contact knife and the grounding static contact is burnt.
Description
Technical Field
The utility model particularly relates to a grounding static contact structure and a grounding switch.
Background
The scheme of the existing inflatable ring main unit and the scheme of the breaker cabinet adopt a scheme of combining a vacuum arc extinguishing chamber with a disconnecting switch, wherein the disconnecting switch is positioned below the breaker; the load switch scheme adopts a three-station load switch and has three working positions of closing, opening and grounding. Two main cabinet type earthing switches are all located in the lower part of the inflatable ring main unit, when the switch is used as an incoming line cabinet, if a line side fails, the circuit breaker cannot cut off the failure (namely, the mechanical and electrical locking fails), and under the special condition, the earthing switch is required to be closed for protecting the safety of self equipment and subordinate equipment, and simply speaking, the earthing switch is closed under the electrified condition. At this time, the movable contact knife can be electrified to switch on and ground, when the movable contact knife is close to the ground static contact, the movable contact knife head can generate an electric arc with the ground static contact due to the voltage difference between two ends, if the switching-on and switching-off capability of the ground switch can not meet the requirement, the air-filled ring main unit can be caused to be in short circuit, heat is accumulated in short time, explosion is caused by extreme conditions, and serious consequences are caused.
Disclosure of Invention
The utility model mainly solves the technical problem of providing a grounding static contact structure and a grounding switch.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a ground connection stationary contact structure and earthing switch, wherein, including fixing ground connection stationary contact and the arc-absorbing piece on the support, the arc-absorbing piece is located the side of ground connection stationary contact, and the highest point of arc-absorbing piece is higher than the highest point of ground connection stationary contact.
By adopting the structure, when the closing operation is carried out by forced electrified grounding, the movable contact blade moves towards the grounding static contact, an arc is formed with the arc-absorbing sheet, and the arc is absorbed by the arc-absorbing sheet, so that the grounding static contact can be effectively prevented from being burnt out by the arc.
The number of the arc-absorbing sheets is two, the two arc-absorbing sheets are respectively positioned at two sides of the grounding static contact, and the two arc-absorbing sheets are symmetrically arranged.
Through the arrangement of two arc sucking sheets, the efficiency of sucking electric arcs is improved.
Wherein, two arc sucking sheets are respectively positioned on two sides of the long side face of the grounding static contact.
The arc-absorbing sheet is positioned on the long side face of the grounding static contact, so that the matching area between the arc-absorbing sheet and the movable contact blade is increased, and the efficiency of absorbing electric arcs is improved.
The arc suction piece comprises an arc suction part, a connecting part and a fixing part, wherein the arc suction part is connected with the fixing part through the connecting part, and the fixing part is connected with the bracket.
Through the setting of fixed part, formed fixed effect, secondly, lengthened the flow through distance of electric arc through connecting portion, better realization striking and arc extinguishing effect.
The grounding static contact further comprises a base, and the fixing part is fixed on the base.
Through the setting of base, increased the fixed strength of ground connection static contact, simultaneously, when the installation, the arc absorbing piece, base, support three form an organic whole fixedly, improve fixed strength.
Wherein, be equipped with the blotter on the support, the blotter is located the below of ground connection static contact.
The buffer cushion is arranged to form a buffer effect, so that the movable contact knife is prevented from directly propping against the bracket when rotating.
Wherein, the buffer pad is rectangular shape and horizontal transversely fixed on the support.
The buffer cushion is arranged, so that the length is increased, the contact area is increased, and the movable contact knife is ensured not to be propped against the bracket.
The grounding switch comprises the grounding static contact structure and the movable contact knife fixed on the frame, wherein the movable contact knife and the frame are arranged in a relative rotation mode, and the grounding static contact is positioned on the rotation track of the movable contact knife
By adopting the structure, in the rotating process of the movable contact knife, an electric arc can be generated between the outer side of the movable contact knife and the arc-absorbing sheet, so that the electric arc can not burn the connecting part of the movable contact knife and the grounding static contact, and the normal use of the closing structure is ensured.
The movable contact knife is connected with the frame through the insulator.
Through the setting of insulator for the movable contact sword is better with the frame connection.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present utility model;
FIG. 2 is a side view of embodiment 1 of the present utility model;
FIG. 3 is an enlarged view of part A of FIG. 2;
FIG. 4 is an enlarged view of a part of embodiment 1 of the present utility model;
fig. 5 is a schematic structural view of an arc suction sheet in embodiment 1 of the present utility model;
fig. 6 is a schematic structural view of embodiment 2 of the present utility model.
Detailed Description
Example 1:
referring to fig. 1-5, a grounding static contact structure comprises a grounding static contact 2 fixed on a bracket 1 and an arc absorbing sheet 3.
The bracket 1 comprises a transverse plate 11 and a longitudinal plate 12, wherein the transverse plate 11 is in a horizontal transverse direction, namely in an X-axis direction, the longitudinal plate 12 is in a vertical direction, namely in a Z-axis direction, and the transverse plate 11 is vertically connected with the longitudinal plate 12.
The support 1 is fixed with the grounding static contacts 2, the number of the grounding static contacts 2 is selected according to practical situations, in this embodiment, the number of the grounding static contacts 2 is three, each grounding static contact 2 corresponds to one phase line, and the structures of the grounding static contacts 2 are identical, so in this embodiment, only one grounding static contact 2 is used as an example for description.
The ground fixed contact 2 is fixed on the vertical plate 12 and extends towards the Y-axis direction, where the ground fixed contact 2 may be a strip shape and directly connected and fixed with the vertical plate 12. In this embodiment, the ground static contact 2 includes a base 21, the base 21 and the ground static contact 2 form a T-shaped structure, the base 21 is fixedly connected to the vertical plate 12, the connection mode is a bolt connection, then the ground static contact 2 extends toward the Y-axis direction, and the size of the base 21 is selectively adjusted according to practical situations.
The arc-absorbing sheets 3 are located on the side face of the grounding static contact 2, and the number of the arc-absorbing sheets 3 can be one, two or more. In this embodiment, the number of the arc-absorbing pieces 3 is described by taking two as an example, the two arc-absorbing pieces 3 are located on two sides of the grounding static contact 2, and the two arc-absorbing pieces 3 are symmetrically arranged. The arc-absorbing sheets 3 are specifically located on two sides of the long side face of the grounding static contact 2, so that the cooperation between the movable contact knife and the grounding static contact 2 is not interfered in the actual use process.
The arc-absorbing sheet 3 can be directly connected and fixed with the bracket 1, then extends towards one side of the grounding static contact 2, and can also be connected and fixed with the base 21. In the present embodiment, the arc absorbing sheet 3 is described as being fixedly connected to the base 21, and those skilled in the art can also think of how the arc absorbing sheet 3 is fixedly connected to the bracket 1 according to the description.
The arc suction piece 3 includes an arc suction portion 31, a connecting portion 32, and a fixing portion 33, and the arc suction portion 31 is connected to the fixing portion 33 via the connecting portion 32. The arc-absorbing part 31 is located on one side of the long side surface of the grounding static contact 2, and the arc-absorbing part 31 can be arranged in parallel with the long side surface or can be obliquely arranged. In this embodiment, the arc suction portions 31 of the two arc suction pieces 3 form an out splayed structure, i.e. extend obliquely outwards toward two sides of the grounding static contact 2. Here, the highest point of the arc suction portion 31 is larger than the highest point of the ground fixed contact 2, that is, the highest point of the arc suction portion 31 in the Z-axis direction is larger than the highest point of the ground fixed contact 2 in the Z-axis direction.
In the process of matching the movable contact blade with the grounding fixed contact 2, the outer side surface of the movable contact blade can be attached to the arc-absorbing part 31, a certain gap can be formed between the movable contact blade and the arc-absorbing part 31, but in the position design of the arc-absorbing part 31, the maintenance is needed, in the process of live operation, the voltage difference can break through air, so that the outer surface of the movable contact blade and the arc-absorbing part 31 form an electric arc, and the outer surface of the movable contact blade and the arc-absorbing part 31 can be directly attached to each other to generate the electric arc in advance.
The connecting portion 32 is located in the X-axis direction, one end of the connecting portion 32 is connected to the arc suction portion 31, the other end is connected to the fixing portion 33, and the fixing portion 33 is located in the Z-axis direction, so that the connecting portion 32 and the fixing portion 33 are vertically connected.
The fixing portion 33 is fixedly connected with the base 21, that is, bolts penetrate through the fixing portion 33 and the base 21 to be fixedly connected with the bracket 1. The number of bolts can be adjusted according to actual requirements.
In this embodiment, the arc absorbing sheet 3 is made of a conductive material, which may be copper or other conductive materials. The arc-absorbing sheet 3 is formed by bending and integrating after stamping, and the processing is more convenient. During actual installation, the arc-absorbing sheet 3, the base 21 and the bracket 1 are integrally installed, so that the installation strength is improved.
The support 1 is provided with a cushion pad 13, the cushion pad 13 is of a strip-shaped structure, the cushion pad 13 is horizontally and transversely fixed on the transverse plate 11, namely, the cushion pad is fixed in the X-axis direction, and the cushion pad 13 is positioned below the grounding static contact 2. The buffer cushion 13 is arranged to form a buffer effect, so that the movable contact knife is prevented from directly propping against the bracket 1 when rotating. The cushion pad 13 and the bracket 1 can be fixed by bolts or glue.
By adopting the structure, when the closing operation is carried out by forcedly carrying out the electrified grounding, the movable contact blade moves towards the grounding static contact 2, and firstly forms an electric arc with the arc-absorbing sheet 3, and the electric arc is absorbed by the arc-absorbing sheet 3, so that the grounding static contact 2 can be effectively prevented from being burnt out by the electric arc.
Example 2:
referring to fig. 6, a grounding switch includes a grounding static contact structure and a movable contact blade 5 fixed on a frame 4.
The structure of the grounding static contact 2 is described in detail in the embodiment 1, so in this embodiment.
The frame 4 is of a hollow square structure, and the bracket 1 is also a part of the frame 4.
The number of the movable contact knives 5 is also three, corresponding to three-phase electricity. In this embodiment, the three movable contact blades 5 are all rotated uniformly, specifically, are rotated relatively to the frame 4, and the rotating structure of the movable contact blades 5 is the prior art, so that the description is omitted in this embodiment. The lower end of the movable contact knife 5 is connected with the frame 4 through an insulator 6. Through the arrangement of the insulator 6, the movable contact knife 5 is better connected with the frame 4.
Claims (9)
1. The utility model provides a ground connection static contact structure which characterized in that: the arc-absorbing piece is positioned on the side face of the grounding fixed contact, and the highest point of the arc-absorbing piece is higher than the highest point of the grounding fixed contact.
2. A grounding static contact structure as defined in claim 1, wherein: the number of the arc-absorbing sheets is two, the two arc-absorbing sheets are respectively positioned at two sides of the grounding static contact, and the two arc-absorbing sheets are symmetrically arranged.
3. A grounding static contact structure as defined in claim 2, wherein: the two arc-absorbing sheets are respectively positioned on two sides of the long side face of the grounding static contact.
4. A grounding static contact structure as defined in claim 1, wherein: the arc suction piece comprises an arc suction part, a connecting part and a fixing part, wherein the arc suction part is connected with the fixing part through the connecting part, and the fixing part is connected with the bracket.
5. The grounding static contact structure as claimed in claim 4, wherein: the grounding static contact further comprises a base, and the fixing part is fixed on the base.
6. A grounding static contact structure as defined in claim 1, wherein: the support is provided with a buffer cushion which is positioned below the grounding static contact.
7. The grounding static contact structure as defined in claim 6, wherein: the cushion pad is long-strip-shaped and horizontally and transversely fixed on the bracket.
8. A grounding switch, characterized in that: the grounding static contact structure comprises the grounding static contact structure as claimed in any one of claims 1-7 and a movable contact knife fixed on a frame, wherein the movable contact knife and the frame are arranged in a relative rotation manner, and the grounding static contact is positioned on the rotation track of the movable contact knife.
9. A grounding switch as in claim 8 wherein: the movable contact knife is connected with the frame through the insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322037581.3U CN220341105U (en) | 2023-07-31 | 2023-07-31 | Grounding static contact structure and grounding switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322037581.3U CN220341105U (en) | 2023-07-31 | 2023-07-31 | Grounding static contact structure and grounding switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220341105U true CN220341105U (en) | 2024-01-12 |
Family
ID=89442521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322037581.3U Active CN220341105U (en) | 2023-07-31 | 2023-07-31 | Grounding static contact structure and grounding switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220341105U (en) |
-
2023
- 2023-07-31 CN CN202322037581.3U patent/CN220341105U/en active Active
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