CN110912015A - PT uses three-station isolating device in gas-insulated cubical switchboard - Google Patents
PT uses three-station isolating device in gas-insulated cubical switchboard Download PDFInfo
- Publication number
- CN110912015A CN110912015A CN201911385438.5A CN201911385438A CN110912015A CN 110912015 A CN110912015 A CN 110912015A CN 201911385438 A CN201911385438 A CN 201911385438A CN 110912015 A CN110912015 A CN 110912015A
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- Prior art keywords
- support
- loop bar
- connecting lever
- isolating device
- driving
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/026—Movable parts and contacts mounted thereon
-
- 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
- H02B13/075—Earthing arrangements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a three-station isolating device for PT in a gas insulated switchgear, which is provided with a grounding closing support arranged in a gas-filled compartment of the switchgear, wherein a static contact piece is arranged on the grounding closing support, and the three-station isolating device also comprises an isolating closing support matched with the grounding closing support, a transmission mechanism driving the isolating closing support and an operating mechanism controlling the transmission mechanism. According to the invention, the contact and separation of the movable contact piece and the static contact piece are realized through the independent operating mechanism arranged outside the inflatable compartment and the transmission mechanism arranged inside the air chamber, so that the voltage transformer (PT) can be switched rapidly under the condition that a main loop of the gas insulated switchgear is not powered off.
Description
Technical Field
The invention relates to a totally-enclosed gas-insulated high-voltage switch device, in particular to a three-station isolating device for PT in a gas-insulated switch cabinet.
Background
The totally-enclosed gas-insulated high-voltage switch equipment is a novel switch equipment used for 10-35 kV or higher voltage power transmission and distribution systems, has the characteristics of high reliability, no maintenance, small occupied area and the like, is mainly used for power transmission of companies and small and medium-sized generators, power distribution of industrial and mining enterprises and public institutions, power receiving and power transmission of electric power system substations, starting of large-scale high-voltage motors and the like, and is used for control protection and monitoring.
Along with the wide application of the gas insulation switch cabinet, the market demand is gradually increased, especially the market demand of the national grid is increased sharply, meanwhile, the industry competition is more and more fierce, and the requirements on the reliability, the overhaul convenience and the like of the gas insulation switch cabinet are also higher and higher. For a gas insulated high-voltage switch cabinet containing a voltage transformer (PT), when the PT needs to be replaced or maintained, the main loop is usually required to be operated after power failure, and power failure brings inconvenience to other equipment on site.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a three-station isolation device for PT in a gas insulated switchgear, which has the characteristics of high safety and reliability, convenience in manufacturing and installation and capability of conveniently and quickly switching a plug-in voltage transformer (PT).
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a PT closes a support with three stations isolating device in gas insulated switchgear, is equipped with the ground connection of installing in cubical switchboard inflation compartment and closes a support, and the ground connection is closed and is equipped with the static contact on the support, and its characteristics are: the device comprises an isolation and closing support matched with a grounding and closing support, a transmission mechanism for driving the isolation and closing support and an operating mechanism for controlling the transmission mechanism; the separation and separation position bracket comprises a connecting sleeve rod, and movable contacts which correspond to the static contacts of the grounding position-closing bracket one by one are arranged on the connecting sleeve rod; the transmission mechanism comprises a driving main shaft and a driven connecting lever, wherein the driven connecting lever rotates to realize the closing and separating actions of the movable contact piece and the static contact piece, the driving connecting lever is fixed at one end of the driving main shaft and is connected with the driven connecting lever through a pull rod, one end of the driven connecting lever, which is connected with the driven connecting lever, is fixedly connected with the connecting sleeve rod, the other end of the driven connecting lever, which is connected with the pull rod, is connected with the pull rod through a driven pin shaft, and the other end of the pull rod is connected with the driving connecting lever through; the operating mechanism comprises an operating support fixed outside the switch cabinet body, 3 magnetic blowing switches are mounted on the operating support, one end of the driving main shaft extends out of the switch cabinet body to the operating support, a cam sheet matched with the magnetic blowing switches is fixed on the driving main shaft outside the switch cabinet body, and a station locking mechanism for locking the cam sheet is arranged on the operating support.
Preferably, the number of the static contact pieces is 3, and the static contact pieces are arranged at equal intervals.
Preferably, the operation support is provided with an operation panel, and the operation panel is provided with indication labels corresponding to the 3 magnetic blow switches.
Preferably, the station locking mechanism is a lock rod, the lock rod comprises an outer loop bar and an inner loop bar, the outer loop bar is used for fixing the camera with the operating support, the inner loop bar is installed in the outer loop bar, and a return spring is arranged between the inner loop bar and the outer loop bar.
Preferably, the cam plate is provided with 3 locking grooves matched with the inner loop bar.
The invention has the advantages that: the device mainly realizes the contact and separation of the movable contact and the static contact through arranging an independent operating mechanism outside the inflatable compartment and a transmission mechanism inside the air chamber, and realizes the rapid switching of a voltage transformer (PT) under the condition that a main loop of the gas insulated switchgear is not powered off. The design is combined with the optimization and improvement of production practice according to the use requirements, the safety and reliability of the final product are high, the manufacture and installation are convenient, and the plug-in voltage transformer (PT) can be switched conveniently and quickly. Need not to have a power failure when PT need be changed or overhauld, only need to connect the position with three station isolating device operation, can open the back shroud safely and overhaul or change etc..
Drawings
The invention is described in further detail below with reference to the figures and the detailed description.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the separation and combination bracket;
FIG. 3 is a schematic structural diagram of a transmission mechanism;
FIG. 4 is a schematic structural view of an operating mechanism;
fig. 5 is a schematic structural diagram of the station locking mechanism.
Detailed Description
The invention discloses a three-station isolating device for PT in a gas insulated switchgear, which is provided with a grounding closing support 1 arranged in a gas-filled compartment of the switchgear, wherein a static contact piece 2 is arranged on the grounding closing support 1, and the three-station isolating device also comprises an isolating closing support matched with the grounding closing support, a transmission mechanism 5 for driving the isolating closing support and an operating mechanism 6 for controlling the transmission mechanism 5; the separation and separation position support comprises a connecting sleeve rod 4, and movable contacts 3 which correspond to the static contacts 2 of the grounding separation and separation position support one by one are arranged on the connecting sleeve rod 4; the transmission mechanism 5 comprises a driving main shaft 7 and a driven connecting lever 10 for driving the connecting sleeve rod to rotate to realize the closing and separating actions of the movable contact piece and the static contact piece, wherein one end of the driving main shaft is fixedly provided with the driving connecting lever 8, the driving connecting lever 8 is connected with the driven connecting lever 10 through a pull rod 9, one end of the driven connecting lever 10, which is connected with the connecting sleeve rod 4, is fixedly connected, the other end of the driven connecting lever 10, which is connected with the pull rod 9, is connected with the driven connecting lever 9 through a driven pin shaft, and the other end of the pull rod 9 is connected with the driving connecting lever 8; the operating mechanism 6 comprises an operating support fixed outside the switch cabinet body, 3 magnetic blowing switches 14 are installed on the operating support, one end of the driving spindle extends out of the switch cabinet body to the operating support, a cam sheet 13 matched with the magnetic blowing switches 14 is fixed on the driving spindle outside the switch cabinet body, and a station locking mechanism for locking the cam sheet is arranged on the operating support. The invention is arranged at the right lower part of a lower air chamber in a gas-insulated high-voltage switch cabinet and mainly comprises a grounding closing support, an isolating closing support, a transmission mechanism and an independent operating mechanism, wherein the grounding closing support, the isolating closing support and the transmission mechanism are arranged inside an inflatable compartment, and the independent operating mechanism is arranged outside the air chamber. The operating bracket is provided with a front plate 12 and a rear plate 15.
The static contact is equipped with 3, and equidistant setting. The grounding closed-position support is mainly composed of a supporting bent plate, a supporting bus, a grounding wire, a static contact piece and the like, wherein the supporting bent plate is fixed on a welding stud on a rear plate of the air chamber through a mounting hole on the supporting bent plate, the supporting bus and the static contact piece are sequentially mounted on the supporting bent plate, and the distance between the two contact pieces is slightly smaller than the thickness of the movable knife so as to ensure reliable contact between the movable knife and the contact piece. An operation panel is arranged on the operation support, and indication labels 17 corresponding to the 3 magnetic blow switches are arranged on the operation panel. The station locking mechanism is a lock rod 11, the lock rod 11 comprises an outer loop bar and an inner loop bar, the outer loop bar is used for fixing the camera with the operating support, the inner loop bar is installed in the outer loop bar, and a reset spring is arranged between the inner loop bar and the outer loop bar. The cam sheet is provided with 3 locking grooves matched with the inner loop bar. The mechanism is locked at the position of the opposite station through the matching of the lock rod and the locking groove, when the lock rod is pulled open and the mechanism is operated anticlockwise until the head of the lock rod slides into the next gap of the cam sheet, the mechanism is locked at the grounding closing position, in addition, a limiting bolt 16 is further arranged through an indicating label 17 so as to be convenient for observing the position of the device, and the limiting bolt is used for preventing misoperation (the grounding position is continuously closed to the ground or the connection position is continuously closed and isolated); similarly, when the lock rod is pulled open in the disengaged position and the mechanism is operated clockwise until the head of the lock rod slides into the next notch of the cam plate, the mechanism will lock in the disengaged position.
The transmission mechanism is a spatial four-pull-rod mechanism, can convert rotation motion of an XOY plane into rotation motion of an YOZ plane, and mainly comprises a driving main shaft, a driving crank arm, a pull rod, a driven crank arm and the like, clamping forks are arranged at two ends of the pull rod, one end of the driving crank arm is connected with the driving main shaft through an elastic pin for a shaft, the other end of the driving crank arm is connected with the clamping forks through a shaft pin, joint ball bearings are arranged in rotation positions of the driven crank arm and the driving crank arm, the driving crank arm assembly, the driven crank arm assembly and the clamping forks are connected through penetrating the joint ball bearings through the shaft pins, and the bearings can be flexibly rotated in installation spaces after installation is finished.
The three groups of isolation position supports are assembled together through the connecting sleeve rods, the connecting mode is threaded connection (epoxy glue is dripped into the threaded connection position after the assembly is finished), the connecting sleeve rods are made of vacuum rubber-impregnated sheets, and the vacuum rubber-impregnated sheets are good in insulating property and high in torsional strength. The movable contact spring is connected with the connecting sleeve rod through a square hole and a square shaft in an interference fit mode, the movable contact spring base plate penetrates through the screw rod through a round hole in the movable contact spring after the movable contact spring is connected with the connecting sleeve rod, then the movable contact spring is fastened through the disc spring and the thin nut, finally the movable contact spring base plate and the mounting hole in the supporting bus are fixed together through the hexagon socket head cap screw bolt, and the movable contact spring is guaranteed to be capable of rotating flexibly after assembly is completed.
A voltage transformer (PT) is installed in an insulating inner cone where an isolating contact support is located, when an isolating device is located at an isolating position, the PT and a main loop are in a disconnected state, if the isolating device needs to be subjected to joint grounding operation, an operation handle is used for driving a main shaft to rotate anticlockwise, driving a crank arm to swing anticlockwise, a pull rod to move upwards and a driven crank arm to swing clockwise, finally a movable contact piece is driven to swing clockwise to be in contact with a static contact piece on a grounding joint support installed in an air chamber, and the PT is communicated with the grounding loop at the moment, so that the joint grounding operation is realized; if the tapping ground operation is needed, the operation handle drives the main shaft to rotate clockwise, the main operation handle drives the driving main shaft to rotate clockwise, the driving crank arm swings clockwise, the pull rod moves downwards, the driven crank arm swings anticlockwise, finally the movable contact piece swings anticlockwise and is separated from the static contact piece arranged on the ground connection position combining support in the air chamber, and at the moment, the PT is disconnected with the ground connection loop, so that the ground connection operation is realized. The operation methods of the combined isolation (PT is communicated with the main loop) and the separated isolation (PT is disconnected with the main loop) are similar to the above. Before operation, the position where the indicator is located (leaving factory is a switch-on position, the lock rod is clamped in a notch of the cam sheet) is observed firstly, the operation handle is inserted, the lock rod is pulled out outwards, meanwhile, the operation direction shown by the operation indication label on the front plate of the mechanism is operated (the lock rod needs to be released in the operation process), the lock rod is automatically switched to a locking position after reaching an isolation position, obvious switching sound is generated, the cam sheet presses the magnetic blow switch, the isolation switch-on indicating lamp is lightened, the position where the indicator is located is the isolation position, and the switch-on operation method is similar to that in the prior art if needed.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (5)
1. The utility model provides a PT closes a support with three stations isolating device in gas insulated switchgear, is equipped with the ground connection of installing in cubical switchboard inflation compartment and closes a support, and the ground connection is closed and is equipped with static contact, its characterized in that on the support: the device comprises an isolation and closing support matched with a grounding and closing support, a transmission mechanism for driving the isolation and closing support and an operating mechanism for controlling the transmission mechanism;
the separation and separation position bracket comprises a connecting sleeve rod, and movable contacts which correspond to the static contacts of the grounding position-closing bracket one by one are arranged on the connecting sleeve rod;
the transmission mechanism comprises a driving main shaft and a driven connecting lever, wherein the driven connecting lever rotates to realize the closing and separating actions of the movable contact piece and the static contact piece, the driving connecting lever is fixed at one end of the driving main shaft and is connected with the driven connecting lever through a pull rod, one end of the driven connecting lever, which is connected with the driven connecting lever, is fixedly connected with the connecting sleeve rod, the other end of the driven connecting lever, which is connected with the pull rod, is connected with the pull rod through a driven pin shaft, and the other end of the pull rod is connected with the driving connecting lever through;
the operating mechanism comprises an operating support fixed outside the switch cabinet body, 3 magnetic blowing switches are mounted on the operating support, one end of the driving main shaft extends out of the switch cabinet body to the operating support, a cam sheet matched with the magnetic blowing switches is fixed on the driving main shaft outside the switch cabinet body, and a station locking mechanism for locking the cam sheet is arranged on the operating support.
2. The three-position isolating device for PT in the gas insulated switchgear of claim 1, wherein: the static contact is equipped with 3, and equidistant setting.
3. The three-position isolating device for PT in the gas insulated switchgear of claim 1, wherein: the operation support is provided with an operation panel, and the operation panel is provided with indication labels corresponding to the 3 magnetic blow switches.
4. The three-position isolating device for PT in the gas insulated switchgear of claim 1, wherein: the station locking mechanism is a lock rod, the lock rod comprises an outer loop bar and an inner loop bar, the outer loop bar is used for fixing the camera with the operating support, the inner loop bar is installed in the outer loop bar, and a reset spring is arranged between the inner loop bar and the outer loop bar.
5. The three-position isolating device for PT in the gas insulated switchgear of claim 4, wherein: the cam sheet is provided with 3 locking grooves matched with the inner loop bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911385438.5A CN110912015A (en) | 2019-12-28 | 2019-12-28 | PT uses three-station isolating device in gas-insulated cubical switchboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911385438.5A CN110912015A (en) | 2019-12-28 | 2019-12-28 | PT uses three-station isolating device in gas-insulated cubical switchboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110912015A true CN110912015A (en) | 2020-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911385438.5A Pending CN110912015A (en) | 2019-12-28 | 2019-12-28 | PT uses three-station isolating device in gas-insulated cubical switchboard |
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| CN (1) | CN110912015A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113643926A (en) * | 2021-09-06 | 2021-11-12 | 杭州玖熠信息科技有限公司 | Auxiliary grounding switch of environment-friendly gas insulation ring main unit |
-
2019
- 2019-12-28 CN CN201911385438.5A patent/CN110912015A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113643926A (en) * | 2021-09-06 | 2021-11-12 | 杭州玖熠信息科技有限公司 | Auxiliary grounding switch of environment-friendly gas insulation ring main unit |
| CN113643926B (en) * | 2021-09-06 | 2024-03-01 | 杭州玖熠信息科技有限公司 | Auxiliary grounding switch of environment-friendly gas-insulated ring main unit |
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