CN202405655U - Safety isolation device for overhauling valve group of convertor station - Google Patents
Safety isolation device for overhauling valve group of convertor station Download PDFInfo
- Publication number
- CN202405655U CN202405655U CN2011204833482U CN201120483348U CN202405655U CN 202405655 U CN202405655 U CN 202405655U CN 2011204833482 U CN2011204833482 U CN 2011204833482U CN 201120483348 U CN201120483348 U CN 201120483348U CN 202405655 U CN202405655 U CN 202405655U
- Authority
- CN
- China
- Prior art keywords
- valve group
- switch
- isolation device
- computer
- safety isolation
- 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.)
- Expired - Fee Related
Links
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- Preventing Unauthorised Actuation Of Valves (AREA)
Abstract
The utility model relates to a safety isolation device for overhauling a valve group of a convertor station, belonging to a switch quantity signal on-off device for preventing misoperation of control protection devices of other operating valve groups. The safety isolation device comprises a computer and eight-path switch quantity input boards, wherein the computer is used for controlling the valve group to operate by means of station quantity signals of a knife switch; the eight-path switch quantity input boards are connected with the computer; one input return circuit of the eight-path switch quantity input boards is connected with a switch which is switched on by inserting an overhauling key; and a pair of normally open contacts are arranged in the insulation shell of the switch. The safety isolation device has the characteristics of simple structure, safety and practicality.
Description
Technical field
The utility model relates to when a valve group is overhauled in the signal of telecommunication on-off system, particularly electrical changing station, moves the switching value signal on-off system of the control protective device malfunction of valve group for avoiding other.
Background technology
The series connection of two valve groups of extra-high voltage direct-current transmission engineering is a utmost point, and the consideration of and operational mode change overlapping based on protection range has the mass data exchange between the valve group.When a valve group maintenance, its light CT sampled value, switch tool quantity of state are still delivered to the control protection system of operation valve group.If service work causes light CT to receive to disturb or the switch tool quantity of state changes, the control protection system of operation valve group may malfunction.Equally, when alternating current filter group overhauled, differential protection light CT possibly cause big poor protection malfunction when being disturbed.
The utility model content
The purpose of the utility model provides a kind of current conversion station valve group maintenance safety spacer assembly, to protect the power supply of on the service valve group, working and can not influence operation valve group.
The purpose of the utility model is achieved in that a kind of current conversion station valve group maintenance safety spacer assembly; Comprise computer through the operation of switch tool state quantity signal control valve group; The 8 way switch amounts input integrated circuit board that is connected with computer; Being connected with one in the input circuit of said 8 way switch amounts input integrated circuit board is inserted by the maintenance key and the switch of conducting is provided with a pair of normally opened contact in the insulation shell of this switch.
Be perfect operation equipment and the interregional safe quarantine measures of construction (maintenance), the utility model increases valve group maintenance key function, and the service valve group is placed " maintenance " state, the protection outlet of locking service valve group.
Its principle is: after dropping into the maintenance key; Two normally opened contacts in the switch insulation housing are by the key conducting, and the loop is connected, and Continuity signal is delivered to the relevant protection of protection main frame locking; Protect out of service automatically, thereby guaranteed on the service valve group, to work and can not influence operation valve group.
The beneficial effect of the utility model is:
1, on the existing equipment basis, do not do any big change, less to the influence of former valve group control protection system, improvement project is very little.
2, the maintenance key is by special messenger's keeping; During maintenance, will overhaul in the housing of key (conducting metal material) insertion switch, two normally opened contacts are communicated with; Continuity signal is delivered to protected main frame (being computer) and the relevant guard signal of locking, make by the automatic pass-out operation of protection equipment.
3, easy and simple to handle, safe and reliable.
Description of drawings
Fig. 1 is the utility model hardware principle block diagram.
Embodiment
Fig. 1 illustrates, this current conversion station valve group maintenance safety spacer assembly.Computer through the operation of switch tool state quantity signal control valve group; The 8 way switch amounts input integrated circuit board that is connected with computer; Being connected with one in the input circuit of 8 way switch amounts inputs integrated circuit board is inserted by the maintenance key and the K switch of conducting is provided with a pair of normally opened contact in the insulation shell of this K switch.Above-mentioned K switch can adopt existing lock structure, promptly is made up of lock core (like existing door latch structure) and two metals that separate (like copper) contact.When not inserting key, the dead bolt on the lock core does not contact with two contacts; After inserting key and angle of turn lock core, the dead bolt overlap joint forms on two contacts and conducts.
Claims (1)
1. current conversion station valve group maintenance safety spacer assembly; Comprise; Through the computer of switch tool state quantity signal control valve group operation, the 8 way switch amounts that are connected with computer input integrated circuit board is characterized in that; Being connected with one in the input circuit of said 8 way switch amounts input integrated circuit board is inserted by the maintenance key and the switch of conducting is provided with a pair of normally opened contact in the insulation shell of this switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204833482U CN202405655U (en) | 2011-11-29 | 2011-11-29 | Safety isolation device for overhauling valve group of convertor station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204833482U CN202405655U (en) | 2011-11-29 | 2011-11-29 | Safety isolation device for overhauling valve group of convertor station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202405655U true CN202405655U (en) | 2012-08-29 |
Family
ID=46703272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204833482U Expired - Fee Related CN202405655U (en) | 2011-11-29 | 2011-11-29 | Safety isolation device for overhauling valve group of convertor station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202405655U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281234A (en) * | 2014-07-10 | 2016-01-27 | 南京南瑞继保电气有限公司 | Direct current power transmission engineering valve group overhauling automation isolation realization method |
-
2011
- 2011-11-29 CN CN2011204833482U patent/CN202405655U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281234A (en) * | 2014-07-10 | 2016-01-27 | 南京南瑞继保电气有限公司 | Direct current power transmission engineering valve group overhauling automation isolation realization method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120829 Termination date: 20121129 |