CN110335777B - Isolating switch with switching bus for converting current - Google Patents
Isolating switch with switching bus for converting current Download PDFInfo
- Publication number
- CN110335777B CN110335777B CN201910615205.3A CN201910615205A CN110335777B CN 110335777 B CN110335777 B CN 110335777B CN 201910615205 A CN201910615205 A CN 201910615205A CN 110335777 B CN110335777 B CN 110335777B
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- CN
- China
- Prior art keywords
- contact
- static
- striking block
- arc striking
- moving
- Prior art date
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- 230000003068 static effect Effects 0.000 claims abstract description 63
- 230000003139 buffering effect Effects 0.000 claims abstract description 6
- 239000004020 conductor Substances 0.000 claims description 13
- 238000002679 ablation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000010891 electric arc Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses an isolating switch with an opening and closing bus for converting current, which comprises a shell, a moving contact and a fixed contact, wherein the moving contact is connected with the fixed contact; the fixed contact is fixed in the shell, one end of the moving contact is hinged in the shell, the other end of the moving contact is clamped with the fixed contact, and the moving contact and the fixed contact are in two states of clamping and separating; the movable contact is provided with a movable arc striking block; the static contact is provided with a static arc striking block with a buffering function. Because the side face of the moving contact is provided with the moving arc striking block, the static contact is provided with the static arc striking block with a buffering function, when the switch is separated, the conductive surface of the moving contact is contacted with the conductive contact finger of the static contact to form a main conductive loop, and the bus switching current arc burns and extinguishes at the arc corners of the moving arc striking block of the moving contact and the static arc striking block of the static contact, the moving contact and the conductive contact finger cannot generate electric arcs due to separation, and the arc is prevented from ablating the conductive contact finger, so that the service life of the invention is long.
Description
Technical Field
The invention relates to the field of electric, in particular to an isolating switch with an open-close bus for converting current.
Background
The isolating switch is the most used one in high-voltage switch electric appliances, and as the name implies, the isolating switch has a relatively simple working principle and structure. The isolating switch mainly comprises a moving contact and a fixed contact, the other end of the moving contact is clamped with the fixed contact, the moving contact and the fixed contact are in clamping connection and separation, a large amount of electric arcs can be generated when the moving contact and the fixed contact are contacted in use, and the electric arcs ablate conductive contact fingers to influence the service life of the isolating switch.
Disclosure of Invention
The invention aims to provide an isolating switch with an open-close bus for converting current.
In order to achieve the above object, the technical solution of the present invention is:
The invention relates to an isolating switch with an opening and closing bus for converting current, which comprises a shell, a moving contact and a fixed contact, wherein the moving contact is connected with the fixed contact; the fixed contact is fixed in the shell, one end of the moving contact is hinged in the shell, the other end of the moving contact is clamped with the fixed contact, and the moving contact and the fixed contact are in two states of clamping and separating; the movable contact is provided with a movable arc striking block; the static contact is provided with a static arc striking block with a buffering function.
The movable contact comprises a movable contact rod and a movable arc striking block; the movable arc striking block is fixedly arranged at the contact end part of the movable contact rod through a screw.
The static contact comprises a static contact rod, a static arc striking block, a positioning sleeve, a fixing screw, a spring, a main conductor and an arc conductor; the static contact rod is provided with a U-shaped open slot, main conductors are respectively arranged on two side walls of the U-shaped open slot, the U-shaped open slot can clamp a moving contact in, a notch is respectively arranged on two side walls of the U-shaped open slot, and a static striking block is movably arranged in the notch of the static contact rod and is contacted with the arc conductors on the notch wall; one end of the positioning sleeve is fixed on the notch of the static contact rod, the other end of the positioning sleeve is hung in the stepped hole of the static striking block through the hanging table, the fixing screw penetrates through the notch wall of the static contact rod and is in threaded connection with the stepped middle hole of the positioning sleeve to fix the positioning sleeve on the static contact rod, the spring is sleeved in the stepped middle hole of the positioning sleeve, two ends of the spring respectively prop against the stepped surface of the stepped middle hole of the positioning sleeve and the static striking block, and a buffer gap is formed between the static striking block and the notch of the static contact rod.
The dynamic arc striking block and the static arc striking block are made of ablation resistant materials.
After the scheme is adopted, as the movable arc striking block is arranged on the side face of the movable contact, the static contact is provided with the static arc striking block with a buffering function, and when the switch is separated, the conductive surface of the movable contact is contacted with the conductive contact finger of the static contact to form a main conductive loop; when the isolating switch is just in time-sharing, the moving contact of the isolating switch and the conductive contact finger in the static contact are just in a separated state, and at the moment, the bus conversion current path is changed into: the bus switching current arc burns and extinguishes at the arc angles of the moving arc striking block of the moving contact and the static arc striking block of the static contact, and the electric arc is not generated between the moving contact and the conductive contact finger due to separation, so that the service life of the bus switching current arc welding device is long.
The invention will be further described with reference to the drawings and the specific examples.
Drawings
FIG. 1 is a schematic diagram of the structure of an isolating switch of the present invention;
FIG. 2 is a cross-sectional view taken along line C-C of FIG. 1;
FIG. 3 is a front view of the moving contact of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is a front view of a stationary contact of the present invention;
FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;
FIG. 7 is a schematic diagram of the invention in the as-separated state;
FIG. 8 is a cross-sectional view taken along line D-D of FIG. 7;
FIG. 9 is a schematic diagram of the disconnecting switch of the present invention in a disconnected state;
fig. 10 is a cross-sectional view of fig. 9 taken along line C-C.
Detailed Description
As shown in fig. 1 and 2, the invention relates to an isolating switch with an open-close bus for converting current, which comprises a shell 1, a moving contact 2 and a fixed contact 3.
The fixed contact 3 is fixed in the shell 1, one end of the moving contact 2 is hinged in the shell 1, the other end of the moving contact 2 is clamped with the fixed contact 3, and the moving contact 2 and the fixed contact 3 are in two states of clamping and separating.
The movable contact 2 is provided with a movable arc striking block 4; the static contact 3 is provided with a static arc striking block 5 with a buffering function.
As shown in fig. 3 and 4, the movable contact 2 comprises a movable contact rod 21 and a movable arc striking block 22; the movable arc striking block 22 is fixedly arranged at the contact end part of the movable contact rod 21 through a screw.
As shown in fig. 5 and 6, the fixed contact 3 comprises a fixed contact rod 31, a fixed arc striking block 32, a positioning sleeve 33, a fixing screw 34, a spring 35, a main conductor 36 and an arc conductor 37; the fixed contact rod 31 is provided with a U-shaped open slot 311, the two side walls of the U-shaped open slot 311 are respectively provided with a main conductor 36, the U-shaped open slot 311 can clamp the movable contact 2 in, the two side walls of the U-shaped open slot 311 are respectively provided with a notch 312, and the fixed arc striking block 32 is movably arranged in the notch 312 of the fixed contact rod 31 and is contacted with the arc conductor 37 on the wall of the notch 312; one end of the positioning sleeve 33 is fixed on the notch 312 of the fixed contact rod 31, the other end of the positioning sleeve 33 is hung in the stepped hole 321 of the static striking block 32 through the hanging table 331, the fixing screw 34 passes through the wall of the notch 312 of the fixed contact rod 31 and the stepped middle hole 332 of the positioning sleeve 33 to screw the positioning sleeve to fix the positioning sleeve on the fixed contact rod 31, the spring 35 is sleeved in the stepped middle hole 332 of the positioning sleeve 33, two ends of the spring 35 respectively prop against the stepped surface of the stepped middle hole 332 of the positioning sleeve 33 and the static striking block 32, and a buffer gap is formed between the static striking block 32 and the notch 312 of the fixed contact rod 31. Since the static contact 3 of the present invention is provided with the static arc striking block 32 with a compression amount, the compression and restoring force thereof is provided by the internal spring 35.
In an embodiment, the dynamic striking block 22 and the static striking block 32 are made of an ablation resistant material.
The working principle of the invention is as follows:
1. As shown in fig. 1 and 2, in the opening state, the static striking block 32 ejects a distance h of 1mm in the direction shown in fig. 6 due to the elastic force of the spring 35; when contacting the moving contact 2, the static arc striking block 32 of the static contact 3 is pressed into the contact, and the moving contact 2 and the static contact 3 form pressure contact.
2. As shown in fig. 7 and 8, in the closing state of the isolating switch, the conductive surface (the moving arc striking block 22) of the moving contact 2 is contacted with the conductive contact finger (the static arc striking block 32) of the static contact 3 to form a main conductive loop;
3. As shown in fig. 9 and 10, when the disconnecting switch is in the time-sharing state, the conductive contact fingers in the moving contact 2 and the fixed contact 3 of the disconnecting switch are in the disengaging state, and the bus switching current path is changed into: dynamic striking block 22 → static striking block 32 → conductor. The moving contact 2 and the conductive contact finger (static arc striking block 32) cannot generate electric arc due to separation, so that the electric arc is prevented from ablating the conductive contact finger.
4. The moving contact 2 continues to move, the moving arc striking block 22 is separated from the static arc striking block 32, an electric arc is generated, the electric arc burns between arc angles of the moving arc striking block 22 and the static arc striking block 32, and when the current passes zero, the electric arc is extinguished.
The foregoing description is only illustrative of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, i.e., the equivalent changes and modifications to the invention as described in the claims and specification should be considered as falling within the scope of the invention.
Claims (2)
1. An isolating switch with an open-close bus for converting current comprises a shell, a moving contact and a fixed contact; the fixed contact is fixed in the shell, one end of the moving contact is hinged in the shell, the other end of the moving contact is clamped with the fixed contact, and the moving contact and the fixed contact are in two states of clamping and separating; the method is characterized in that: the movable contact is provided with a movable arc striking block; the static contact is provided with a static arc striking block with a buffering function; the static contact comprises a static contact rod, a static arc striking block, a positioning sleeve, a fixing screw, a spring, a main conductor and an arc conductor; the static contact rod is provided with a U-shaped open slot, main conductors are respectively arranged on two side walls of the U-shaped open slot, the U-shaped open slot can clamp a moving contact in, a notch is respectively arranged on two side walls of the U-shaped open slot, and a static striking block is movably arranged in the notch of the static contact rod and is contacted with the arc conductors on the notch wall; one end of the positioning sleeve is fixed on the notch of the static contact rod, the other end of the positioning sleeve is hung in the stepped hole of the static arc striking block through the hanging table, the fixing screw penetrates through the notch wall of the static contact rod and is in threaded connection with the stepped middle hole of the positioning sleeve to fix the positioning sleeve on the static contact rod, the spring is sleeved in the stepped middle hole of the positioning sleeve, two ends of the spring respectively prop against the stepped surface of the stepped middle hole of the positioning sleeve and the static arc striking block, and a buffer gap is formed between the static arc striking block and the notch of the static contact rod; the movable contact comprises a movable contact rod and a movable arc striking block; the movable arc striking block is fixedly arranged at the contact end part of the movable contact rod through a screw.
2. The isolating switch with switching bus switching current according to claim 1, wherein: the dynamic arc striking block and the static arc striking block are made of ablation resistant materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910615205.3A CN110335777B (en) | 2019-07-09 | 2019-07-09 | Isolating switch with switching bus for converting current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910615205.3A CN110335777B (en) | 2019-07-09 | 2019-07-09 | Isolating switch with switching bus for converting current |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110335777A CN110335777A (en) | 2019-10-15 |
| CN110335777B true CN110335777B (en) | 2024-04-30 |
Family
ID=68144463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910615205.3A Active CN110335777B (en) | 2019-07-09 | 2019-07-09 | Isolating switch with switching bus for converting current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110335777B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114429879B (en) * | 2021-12-16 | 2024-03-22 | 河南平高电气股份有限公司 | Isolation static contact and three-station isolation grounding switch |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3586804A (en) * | 1967-12-12 | 1971-06-22 | Siemens Ag | Disconnect switch |
| CN201348971Y (en) * | 2009-01-12 | 2009-11-18 | 上海华通开关厂有限公司 | Open-close busbar current conversion device for improved isolating switch |
| WO2015197785A1 (en) * | 2014-06-26 | 2015-12-30 | Siemens Aktiengesellschaft | Static arc-striking contact assembly and grounding switch thereof |
| WO2017152667A1 (en) * | 2016-03-08 | 2017-09-14 | 国家电网公司 | Isolation and grounding switch mechanism, switchgear, and guide contact base thereof |
| CN207038384U (en) * | 2017-06-16 | 2018-02-23 | 浙江金莱勒电气有限公司 | A kind of extinguishing arc structure of load-break switch |
| WO2018082384A1 (en) * | 2016-11-02 | 2018-05-11 | 乐清市也为电气有限公司 | Movable and stationary contact device for disconnect switch |
| CN109346368A (en) * | 2018-11-28 | 2019-02-15 | 许继（厦门）智能电力设备股份有限公司 | A kind of structure of contact terminal of guillotine type disconnecting switch |
| CN210110627U (en) * | 2019-07-09 | 2020-02-21 | 许继（厦门）智能电力设备股份有限公司 | Isolating switch with switching bus conversion current |
-
2019
- 2019-07-09 CN CN201910615205.3A patent/CN110335777B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3586804A (en) * | 1967-12-12 | 1971-06-22 | Siemens Ag | Disconnect switch |
| CN201348971Y (en) * | 2009-01-12 | 2009-11-18 | 上海华通开关厂有限公司 | Open-close busbar current conversion device for improved isolating switch |
| WO2015197785A1 (en) * | 2014-06-26 | 2015-12-30 | Siemens Aktiengesellschaft | Static arc-striking contact assembly and grounding switch thereof |
| WO2017152667A1 (en) * | 2016-03-08 | 2017-09-14 | 国家电网公司 | Isolation and grounding switch mechanism, switchgear, and guide contact base thereof |
| WO2018082384A1 (en) * | 2016-11-02 | 2018-05-11 | 乐清市也为电气有限公司 | Movable and stationary contact device for disconnect switch |
| CN207038384U (en) * | 2017-06-16 | 2018-02-23 | 浙江金莱勒电气有限公司 | A kind of extinguishing arc structure of load-break switch |
| CN109346368A (en) * | 2018-11-28 | 2019-02-15 | 许继（厦门）智能电力设备股份有限公司 | A kind of structure of contact terminal of guillotine type disconnecting switch |
| CN210110627U (en) * | 2019-07-09 | 2020-02-21 | 许继（厦门）智能电力设备股份有限公司 | Isolating switch with switching bus conversion current |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110335777A (en) | 2019-10-15 |
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