CN110752103A - Two-position switch for gas-insulated metal-enclosed switchgear - Google Patents
Two-position switch for gas-insulated metal-enclosed switchgear Download PDFInfo
- Publication number
- CN110752103A CN110752103A CN201810824326.4A CN201810824326A CN110752103A CN 110752103 A CN110752103 A CN 110752103A CN 201810824326 A CN201810824326 A CN 201810824326A CN 110752103 A CN110752103 A CN 110752103A
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- China
- Prior art keywords
- gas
- operating mechanism
- insulated metal
- enclosed switchgear
- position switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003068 static effect Effects 0.000 claims abstract description 32
- 238000007789 sealing Methods 0.000 claims description 11
- 239000007769 metal material Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0356—Mounting of monitoring devices, e.g. current transformers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
- H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses a two-station switch for gas-insulated metal-enclosed switchgear, and belongs to the technical field of medium-voltage gas-insulated metal-enclosed switchgear. The invention comprises a gas tank, a moving contact, a static contact, an insulating main shaft and an operating mechanism, wherein the moving contact and the static contact are arranged in the gas tank, the insulating main shaft is rotatably arranged in the gas tank, the moving contact is fixed on the insulating main shaft, the static contact comprises a static contact connected with a main loop and a static contact connected with a grounding loop, the insulating main shaft rotates under the driving of the operating mechanism, and the moving contact is connected with the static contact connected with the main loop or the static contact connected with the grounding loop. The invention is provided with a two-position switch in the medium-pressure gas-insulated metal-enclosed switchgear, which is connected with a main loop or a grounding loop. The voltage main transformer connected with the main loop is prevented from being dismounted when an insulation test is performed in the conventional connection mode; when the voltage transformer is replaced and maintained, the main circuit needs to be powered off.
Description
Technical Field
The invention belongs to the technical field of medium-voltage gas-insulated metal-enclosed switchgear, and particularly relates to a two-position switch for gas-insulated metal-enclosed switchgear.
Background
An external voltage transformer is generally used in the existing medium-voltage gas-insulated metal-enclosed switchgear, the voltage transformer and a main loop are fixedly connected, and the voltage transformer and the main loop need to be isolated when a main loop insulation test (power frequency withstand voltage) is performed. In addition, when the voltage transformer is replaced or maintained, the main circuit needs to be closed, and particularly when the voltage transformer is installed on the incoming line cabinet, the incoming line cabinet is stopped, so that the whole substation is closed.
The use of the gas-insulated two-station switch for the voltage transformer can thoroughly solve the problems, the two-station switch only needs to be switched from the connection position to the connection position when the insulation test of a main loop is required and the voltage transformer is updated or maintained, and the voltage transformer is safer to replace and maintain after being connected to the connection position.
Disclosure of Invention
The invention aims to provide a two-position switch for gas-insulated metal-enclosed switchgear, which is convenient to operate.
Specifically, the invention is realized by adopting the following technical scheme: the movable contact and the static contact are arranged in the gas tank, the insulating main shaft is rotatably arranged in the gas tank, the movable contact is fixed on the insulating main shaft, the static contact comprises a static contact connected with a main loop and a static contact connected with a grounding loop, the insulating main shaft rotates under the driving of the operating mechanism, and the movable contact is connected with the static contact connected with the main loop or connected with the static contact connected with the grounding loop.
Further, the static contact comprises a pressure equalizing seat and a spring piece; the pressure equalizing seat is provided with a groove, the two ends of the spring piece are folded inwards respectively and then are integrally C-shaped, and the spring piece is embedded in the groove of the pressure equalizing seat.
Further, a voltage transformer is arranged outside the air box, and the moving contact is connected with the voltage transformer.
Further, the insulating main shaft is provided with two or more moving contacts, and correspondingly, two or more groups of static contacts are arranged.
Further, the operating mechanism is a rotary operating mechanism and comprises a rotating shaft, a first gear and a second gear, wherein the first gear and the second gear are meshed with each other, the first gear is fixed on the insulating main shaft, the second gear is fixed at one end of the rotating shaft, the other end of the rotating shaft penetrates out of the air box, the rotating shaft is driven by an external driving force to rotate, and the movable contact is connected with a static contact connected with the main loop or a static contact connected with the grounding loop.
Further, the first gear and the second gear are both bevel gears.
Furthermore, the operating mechanism is a knife switch type operating mechanism and comprises a pull rod, a connecting rod and a push-pull handle, one end of the pull rod is fixed on the insulating main shaft, the other end of the pull rod is hinged with one end of the connecting rod, the other end of the connecting rod penetrates out of the air box, and the connecting rod is pushed and pulled under the driving of an external driving force to enable the movable contact to be connected with a static contact connected with the main circuit or connected with a static contact connected with the grounding circuit.
Furthermore, a sealing flange is arranged on the air box,
when the operating mechanism is a rotary operating mechanism, the other end of the rotating shaft penetrates through the air box through the sealing flange and extends to the outside;
when the operating mechanism is a knife switch type operating mechanism, the other end of the connecting rod passes through the air box through the sealing flange and extends to the outside.
Furthermore, the end part of the rotating shaft is also provided with an operating handle,
when the operating mechanism is a rotary operating mechanism, the operating handle is a rotary handle, and the rotary handle drives the rotating shaft to rotate.
When the operating mechanism is a disconnecting link type operating mechanism, the operating handle is a push-pull handle, and the connecting rod is driven to push and pull through the push-pull handle.
Further, the air box is made of metal materials, and insulating gas is filled in the air box.
The invention has the following beneficial effects: the invention is provided with a two-position switch in the medium-pressure gas-insulated metal-enclosed switchgear, which is connected with a main loop or a grounding loop. The voltage main transformer connected with the main loop is prevented from being dismounted when an insulation test is performed in the conventional connection mode; when the voltage transformer is replaced and maintained, the main circuit needs to be powered off. The invention is simple, safe and convenient to operate.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural diagram of the connection of the present invention with a voltage transformer.
Fig. 3 is a schematic view of the working state of the rotary operating mechanism of the present invention.
FIG. 4 is a schematic diagram of the operation of the primary circuit in the case of a rotary actuator according to the present invention.
FIG. 5 is a schematic diagram of the working state of the grounding circuit for the rotary operating mechanism of the present invention.
FIG. 6 is a schematic view of the working state of the connecting main circuit in the case of the gate type operating mechanism of the present invention.
Fig. 7 is a schematic diagram of the working state of the grounding circuit when the door-lock type operating mechanism is adopted in the invention.
Fig. 8 is a schematic structural diagram of a static contact according to the present invention.
Reference numerals in the drawings: 11-moving contact, 121-voltage equalizing seat, 122-spring piece, 13-insulating main shaft, 141-second gear, 142-rotating shaft, 143-rotating handle, 144-first gear, 151-pull rod, 152-connecting rod, 153-push-pull handle, 16-support, 2-air box, 3-sealing flange and 4-voltage transformer.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Example 1:
an embodiment of the present invention is a two-position switch for a gas insulated metal-enclosed switchgear, and as shown in fig. 1, the two-position switch includes a gas tank 2, a moving contact 11, a stationary contact, an insulated main shaft 13, and an operating mechanism. The moving contact 11 and the static contact 2 are arranged in the gas tank 2, and the moving contact 11 is fixed on the insulating main shaft 13 and rotates synchronously with the insulating main shaft 13. The insulating main shaft 13 is made of an insulating material, the insulating main shaft 13 is rotatably mounted on the air box 2 through a support 16, two or more moving contacts 11 are arranged on the insulating main shaft 13 (three moving contacts are illustrated in the embodiment), and two or more groups of static contacts are correspondingly arranged (three groups are illustrated in the embodiment).
The static contact may adopt a structure as shown in fig. 8, and includes a voltage-equalizing seat 121 and a spring leaf 122; the pressure equalizing seat 121 is provided with a groove, the two ends of the spring piece 122 are folded inwards respectively to form a C shape, and the spring piece 122 is embedded in the groove of the pressure equalizing seat 121. The static contacts comprise a static contact connected with a main loop and a static contact connected with a grounding loop, the insulating main shaft 13 rotates under the driving of the operating mechanism, and the movable contact 11 is connected with the static contact connected with the main loop or the static contact connected with the grounding loop.
The air box 2 is made of metal material, and the air box 2 is filled with insulating gas, wherein the insulating gas can be SF6, N2, CO2, dry air and the like. As shown in fig. 2, a voltage transformer 4 is arranged outside the air box 2, and the moving contact 11 is connected with the voltage transformer 4 through a flexible conductor.
The present invention is not limited to the structure of the operating mechanism, and the present embodiment will be described in detail with reference to a rotary operating mechanism as an example. As shown in fig. 3, 4 and 5, the operating mechanism is a rotary operating mechanism, and includes a rotating shaft 142, and a first gear 144 and a second gear 141 that are engaged with each other, the first gear 144 is fixed on the insulating main shaft 13, the second gear 141 is fixed at one end of the rotating shaft 142, the other end of the rotating shaft 142 penetrates out of the air tank 2, and the rotating shaft 142 rotates under the driving of an external driving force, so that the moving contact 11 is connected to a stationary contact connected to a main circuit, or connected to a stationary contact connected to a ground circuit. In a preferred embodiment of the present invention, the first gear 144 and the second gear 141 are both bevel gears. The air box 2 is provided with a sealing flange 3, and the other end of the rotating shaft 142 passes through the air box 2 through the sealing flange 3 and extends to the outside. An operating handle is further arranged at the end of the rotating shaft 142, the operating handle is a rotating handle 143, and the rotating shaft 142 is driven to rotate through the rotating handle 143.
Example 2:
the other embodiment of the invention has basically the same working principle as the embodiment 1, and comprises the air box 2, the movable contact 11, the fixed contact and the insulated main shaft 13 which are basically the same as the embodiment 1, and the difference is mainly an operating mechanism.
The present invention is not limited to the structure of the operating mechanism, and the present embodiment will be described in detail by taking a knife switch type operating mechanism as an example. As shown in fig. 6 and 7, the knife switch type operating mechanism includes a pull rod 151, a connecting rod 152 and a push-pull handle 153, one end of the pull rod 151 is fixed on the insulating main shaft 13, the other end is hinged to one end of the connecting rod 152, the other end of the connecting rod 152) penetrates out of the air box 2, the connecting rod 152 is pushed and pulled under the driving of an external driving force, and the moving contact 11 is connected with a fixed contact connected with a main circuit or connected with a fixed contact connected with a grounding circuit. The air box 2 is provided with a sealing flange 3, and the other end of the connecting rod 152 passes through the air box 2 through the sealing flange 3 and extends to the outside. An operating handle is further arranged at the end of the rotating shaft 142, the operating handle is a push-pull handle 153, and the connecting rod 152 is driven to push and pull through the push-pull handle 153.
Although the present invention has been described in terms of the preferred embodiment, it is not intended that the invention be limited to the embodiment. Any equivalent changes or modifications made without departing from the spirit and scope of the present invention also belong to the protection scope of the present invention. The scope of the invention should therefore be determined with reference to the appended claims.
Claims (10)
1. A two-position switch for gas-insulated metal-enclosed switchgear, characterized in that: the gas tank comprises a gas tank (2), a moving contact (11), a fixed contact, an insulating main shaft (13) and an operating mechanism, wherein the moving contact (11) and the fixed contact (12) are arranged in the gas tank (2), the insulating main shaft (13) is rotatably arranged in the gas tank (2), the moving contact (11) is fixed on the insulating main shaft (13), the fixed contact comprises a fixed contact connected with a main loop and a fixed contact connected with a grounding loop, the insulating main shaft (13) rotates under the driving of the operating mechanism, and the moving contact (11) is connected with the fixed contact connected with the main loop or connected with the fixed contact connected with the grounding loop.
2. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: the static contact comprises a pressure equalizing seat (121) and a spring piece (122); the pressure equalizing seat (121) is provided with a groove, the two ends of the spring piece (122) are folded inwards respectively and then are integrally C-shaped, and the spring piece (122) is embedded in the groove of the pressure equalizing seat (121).
3. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: a voltage transformer (4) is arranged outside the air box (2), and the moving contact (11) is connected with the voltage transformer (4).
4. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: two or more moving contacts (11) are arranged on the insulating main shaft (13), and two or more groups of static contacts are correspondingly arranged.
5. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: the operating mechanism is a rotary operating mechanism and comprises a rotating shaft (142), a first gear (144) and a second gear (141) which are meshed with each other, the first gear (144) is fixed on the insulating main shaft (13), the second gear (141) is fixed at one end of the rotating shaft (142), the other end of the rotating shaft (142) penetrates out of the air box (2), the rotating shaft (142) rotates under the driving of an external driving force, and the movable contact (11) is connected with a fixed contact connected with a main loop or a fixed contact connected with a grounding loop.
6. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 5, characterized in that: the first gear (144) and the second gear (141) are both bevel gears.
7. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: the operating mechanism is a disconnecting link type operating mechanism and comprises a pull rod (151), a connecting rod (152) and a push-pull handle (153), one end of the pull rod (151) is fixed on the insulating main shaft (13), the other end of the pull rod is hinged with one end of the connecting rod (152), the other end of the connecting rod (152) penetrates out of the air box (2), the connecting rod (152) is pushed and pulled under the driving of external driving force, and the movable contact (11) is connected with a static contact connected with a main loop or connected with a static contact connected with a grounding loop.
8. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 5 or 7, characterized in that: a sealing flange (3) is arranged on the air box (2),
when the operating mechanism is a rotary operating mechanism, the other end of the rotating shaft (142) penetrates through the air box (2) through the sealing flange (3) and extends to the outside;
when the operating mechanism is a knife switch type operating mechanism, the other end of the connecting rod (152) penetrates through the air box (2) through the sealing flange (3) and extends to the outside.
9. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 5 or 7, characterized in that: the end part of the rotating shaft (142) is also provided with an operating handle,
when the operating mechanism is a rotary operating mechanism, the operating handle is a rotating handle (143), and the rotating shaft (142) is driven to rotate through the rotating handle (143).
When the operating mechanism is a disconnecting link type operating mechanism, the operating handle is a push-pull handle (153), and the connecting rod (152) is driven to push and pull through the push-pull handle (153).
10. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: the air box (2) is made of metal materials, and insulating gas is filled in the air box (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810824326.4A CN110752103A (en) | 2018-07-24 | 2018-07-24 | Two-position switch for gas-insulated metal-enclosed switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810824326.4A CN110752103A (en) | 2018-07-24 | 2018-07-24 | Two-position switch for gas-insulated metal-enclosed switchgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110752103A true CN110752103A (en) | 2020-02-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810824326.4A Pending CN110752103A (en) | 2018-07-24 | 2018-07-24 | Two-position switch for gas-insulated metal-enclosed switchgear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110752103A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201576606U (en) * | 2009-12-28 | 2010-09-08 | 包红旗 | Rotary isolation/ground switch |
| CN203038815U (en) * | 2013-01-28 | 2013-07-03 | 深圳市金博联电力技术有限公司 | Isolation grounding switch for solid insulation switch cabinet |
| CN203644637U (en) * | 2013-11-12 | 2014-06-11 | 天津威乐斯机电有限公司 | Isolation switch having an added auxiliary switch |
| CN204029657U (en) * | 2014-09-16 | 2014-12-17 | 浙江欧迪森电气有限公司 | Operating mechanism of dual-power switch |
| CN204927170U (en) * | 2015-07-10 | 2015-12-30 | 江阴市云峰电器设备有限公司 | Admittedly seal formula vacuum load switch - fuse combined electrical apparatus |
| CN205509454U (en) * | 2016-03-04 | 2016-08-24 | 长园电力技术有限公司 | Can switch grounding box of ground connection mode with electricity |
| CN106601538A (en) * | 2016-12-19 | 2017-04-26 | 平高集团有限公司 | Direct current bypass switch |
| CN208690122U (en) * | 2018-07-24 | 2019-04-02 | 江苏大全长江电器股份有限公司 | Two position switch for Cubicle Gas-Insulated Switchgear |
-
2018
- 2018-07-24 CN CN201810824326.4A patent/CN110752103A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201576606U (en) * | 2009-12-28 | 2010-09-08 | 包红旗 | Rotary isolation/ground switch |
| CN203038815U (en) * | 2013-01-28 | 2013-07-03 | 深圳市金博联电力技术有限公司 | Isolation grounding switch for solid insulation switch cabinet |
| CN203644637U (en) * | 2013-11-12 | 2014-06-11 | 天津威乐斯机电有限公司 | Isolation switch having an added auxiliary switch |
| CN204029657U (en) * | 2014-09-16 | 2014-12-17 | 浙江欧迪森电气有限公司 | Operating mechanism of dual-power switch |
| CN204927170U (en) * | 2015-07-10 | 2015-12-30 | 江阴市云峰电器设备有限公司 | Admittedly seal formula vacuum load switch - fuse combined electrical apparatus |
| CN205509454U (en) * | 2016-03-04 | 2016-08-24 | 长园电力技术有限公司 | Can switch grounding box of ground connection mode with electricity |
| CN106601538A (en) * | 2016-12-19 | 2017-04-26 | 平高集团有限公司 | Direct current bypass switch |
| CN208690122U (en) * | 2018-07-24 | 2019-04-02 | 江苏大全长江电器股份有限公司 | Two position switch for Cubicle Gas-Insulated Switchgear |
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