CN202453470U - Checking instrument for SF6 gas density relay - Google Patents
Checking instrument for SF6 gas density relay Download PDFInfo
- Publication number
- CN202453470U CN202453470U CN2012200443580U CN201220044358U CN202453470U CN 202453470 U CN202453470 U CN 202453470U CN 2012200443580 U CN2012200443580 U CN 2012200443580U CN 201220044358 U CN201220044358 U CN 201220044358U CN 202453470 U CN202453470 U CN 202453470U
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- control board
- master control
- circuit
- gas density
- density relay
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Abstract
The utility model belongs to a checking instrument for an SF6 gas density relay. The checking instrument for the SF6 gas density relay is characterized by comprising a shell and a detection circuit arranged in the shell, wherein the detection circuit mainly comprises a master control board, a motor control circuit, an analogue-to-digital converter (ADC) level conversion circuit, a human-computer interaction display screen and a panel interface; the motor control circuit, the panel interface, the ADC level conversion circuit and the human-computer interaction display screen are connected with the master control board respectively; the master control board is a core unit, and is used for the whole process of dispatching apparatuses for measurement and response to human-computer interaction operation; and the motor control circuit is connected with a direct current cylinder motor; the ADC level conversion circuit is connected with a temperature sensor and a pressure sensor respectively. The checking instrument has the advantages that the SF6 gas density relay can be automatically checked without disassembly, and the checking instrument is conveniently and quickly used, is environment-friendly and free of emission, and can be used for checking a normal temperature pressure gauge and a density meter at any environmental temperature.
Description
Technical field
The utility model belongs to the instrument accessory that the method for electricity consumption is measured, and especially belongs to the SF6 gas density relay checking instrument.
Background technology
Along with the progress of science, the SF6 electric product has been widely used in power department, industrial and mining enterprises, has promoted the fast development of electric power enterprise, how to guarantee that the reliable and secure operation of SF6 electric product has become one of vital task of power department.Utilize traditional pneumatic generating means verification SF6 gas density relay to exist following drawback: need gas density relay be pulled down during measurement and carry out verification; Cause gas leakage during dismounting easily; Influence the loss of gas purity and SF6 gas, can not guarantee the degree of accuracy of verification; Measuring process is loaded down with trivial details, needs continuous artificial gas circuit to regulate operation, also possibly introduce the error that human factor causes; Tail gas directly discharges in the checking procedure, pollutes environment; To under the particular environment temperature, warning and the block action force value to various SF6 gas density relays measure; Pairing normal pressure value was not directly perceived when the data after the measurement needed the manual conversion to become 20 ℃; Data sheet after the measurement needs manual work to fill in, inefficiency, also easy error.
Summary of the invention
The utility model purpose is to overcome above-mentioned shortcoming, provides a kind of and need not to dismantle, intelligent full-automatic verification, do not have the SF6 gas density relay checking instrument of discharging environment-friendly type.
The technical scheme that the utility model adopted is a kind of SF6 gas density relay checking instrument; Its main points are; It comprises housing and is contained in the testing circuit in the housing; Described testing circuit mainly is made up of master control board, circuit for controlling motor, ADC level shifting circuit, man-machine interactive display screen, panel interface; Circuit for controlling motor, panel interface, ADC level shifting circuit and man-machine interactive display screen are connected with master control board respectively, and master control board is a core cell, are responsible for the overall process of scheduling apparatus measures and the response that man-machine interactive is operated; Circuit for controlling motor is connected with direct current cylinder motor, and the ADC level shifting circuit is connected with pressure transducer with temperature sensor respectively.
The utility model directly is connected verification through panel interface and SF6 gas density relay to carry out; Whole checking procedure is operated through the man-machine interactive display screen; Realize intelligent full-automatic verification, avoided the error that produces owing to human factor, emission-free discharging; Through temperature sensor and on-the-spot detected temperatures of pressure transducer and pressure; Program through inner setting directly converts, pairing normal pressure value when the data after measuring directly are converted into 20 ℃, not only intuitively but also objective.
Can export better in order to detect data, the utility model also can increase various data-interfaces as: testing circuit also comprises USB interface, and USB interface is connected with master control board, and usb circuit mainly adopts CH376 file management control chip; Testing circuit also comprises the RS232 interface, and the RS232 interface is connected with master control board; Testing circuit also comprises printer, and printer is connected with master control board, but the field print test data.
The C8051F020 Series of MCU is adopted in master control board (1), like C8051F020, C8051F021 or C8051F022 etc.
Circuit for controlling motor mainly is made up of two relays, is used to control direct current cylinder motor positive and inverse, accomplishes boosting and reduced pressure operation in the density checking procedure.
The ADC level shifting circuit mainly is made up of precision resistance dividing potential drop and capacitor filter; Be used for converting the 24V current signal of measuring process sensor measurement output to master control board discernible 0-2.5V voltage signal, supply the built-in ADC converter sampling of master control board.
Adopt ModBus RTU serial communication protocol to carry out exchanges data between man-machine interactive display screen and the master control board, master control board cycle detection display screen state, and real-time response user operation.
The advantage of the utility model is to need not to dismantle the just verification automatically of SF6 gas density relay, has avoided loss and the human factor of SF6 gas and the error that produces, uses more convenient, quick; Environmental protection does not have discharging, and adopting modulus mixed type monocycle high-speed microprocessor is core; Has high precision, high stability, the characteristics of high reliability; Adopt touch-screen, complete Chinese actions menu, friendly interface, simple and convenient; Instrument shows current pressure, pressure and environment temperature corresponding 20 ℃ the time simultaneously during measurement, has solved the difficult problem of SF6 density monitor field-checking, and can carry out verification to normal temperature tensimeter and density meter under the environment temperature arbitrarily.
Description of drawings
Fig. 1 is the theory diagram of the utility model testing circuit
Fig. 2 is the theory diagram of the utility model embodiment 2 testing circuits
Wherein: 1 master control board, 2 circuit for controlling motor, 3 ADC level shifting circuits, 4 man-machine interactive display screens, 5 USB interfaces, 6 printers, 7 direct current cylinder motors, 8 temperature sensors, 9 pressure transducers, 10 RS232 interfaces, 11 panel interfaces.
Embodiment
Below in conjunction with view the utility model is carried out detailed description, following embodiment can make the professional and technical personnel more understand the utility model, but does not limit the utility model in any form.
As shown in Figure 1; A kind of SF6 gas density relay checking instrument, it comprises housing and is contained in the testing circuit in the housing that described testing circuit mainly is made up of master control board 1, circuit for controlling motor 2, ADC level shifting circuit 3, man-machine interactive display screen 4, panel interface 11; Panel interface 11 is the measurement interface input end on this instrument panel; For user's testing data sets up bridge between surveying instrument, circuit for controlling motor 2, panel interface 11, ADC level shifting circuit 3 and man-machine interactive display screen 4 are connected with master control board 1 respectively, and master control board 1 is a core cell; Adopt the C8051F020 Series of MCU; Like C8051F020, C8051F021 or C8051F022 etc., be responsible for the overall process of scheduling apparatus measures and the response that man-machine interactive is operated, adopt ModBus RTU serial communication protocol to carry out exchanges data between man-machine interactive display screen 4 and the C8051F020; C8051F020 cycle detection display screen state, and real-time response user operation.
Circuit for controlling motor 2 is connected with direct current cylinder motor 7, and circuit for controlling motor 2 mainly is made up of two relays, is used to control 3 rotatings of direct current cylinder motor, accomplishes boosting and reduced pressure operation in the density checking procedure.
ADC level shifting circuit 3 is connected with pressure transducer 9 with temperature sensor 8 respectively; ADC level shifting circuit 3 mainly is made up of precision resistance dividing potential drop and capacitor filter; Be used for converting the 24V current signal that measuring process is measured output with temperature sensor 5 and pressure transducer 6 to C8051F020 discernible 0-2.5V voltage signal, supply the built-in ADC converter sampling of C8051F020.Wherein, what temperature sensor and pressure transducer read all is actual values, but measured force value pairing normal pressure value also need be converted into 20 ℃ in addition in inside the time, with for reference, it is identical with prior art that all the other do not state part.
As shown in Figure 2, be the embodiment 2 of the utility model, a kind of SF6 gas density relay checking instrument; On the basis of the foregoing description 1; Increased various data-interfaces that are connected with master control board 1 like USB interface 5, RS232 interface 10, printer 6, printer 6 is a minitype thermal printer, the USB interface 5 main CH376 file management control chips that adopt; Make things convenient for C8051F020 read-write USB flash disk equipment; Cooperate minitype thermal printer 9, can be user real time and print the in-site measurement report, or measurement data is exported to the USB memory device.The RS232 interface links to each other with the PC host computer, cooperates the supporting special-purpose PC software of general China can the AH9688 measurement data be uploaded to PC and preserves and can generate automatically the measurement data report, supplies the user to print and consults.
Claims (9)
1. SF6 gas density relay checking instrument; It is characterized in that; It comprises housing and is contained in the testing circuit in the housing; Described testing circuit mainly is made up of master control board (1), circuit for controlling motor (2), ADC level shifting circuit (3), man-machine interactive display screen (4), panel interface (11); Circuit for controlling motor (2), panel interface (11), ADC level shifting circuit (3) and man-machine interactive display screen (4) are connected with master control board (1) respectively, and master control board (1) is a core cell, are responsible for the overall process of scheduling apparatus measures and the response that man-machine interactive is operated; Circuit for controlling motor (2) is connected with direct current cylinder motor (7), and ADC level shifting circuit (3) is connected with pressure transducer (9) with temperature sensor (8) respectively.
2. a kind of SF6 gas density relay checking instrument according to claim 1 is characterized in that testing circuit also comprises USB interface (5), and USB interface (5) is connected with master control board (1).
3. a kind of SF6 gas density relay checking instrument according to claim 1 is characterized in that testing circuit also comprises RS232 interface (10), and RS232 interface (10) is connected with master control board (1).
4. a kind of SF6 gas density relay checking instrument according to claim 1 is characterized in that testing circuit also comprises printer (6), and printer (6) is connected with master control board (1).
5. a kind of SF6 gas density relay checking instrument according to claim 1 is characterized in that, the C8051F020 Series of MCU is adopted in master control board (1).
6. a kind of SF6 gas density relay checking instrument according to claim 1; It is characterized in that; Circuit for controlling motor (2) mainly is made up of two relays, is used to control direct current cylinder motor (7) rotating, accomplishes boosting and reduced pressure operation in the density checking procedure.
7. a kind of SF6 gas density relay checking instrument according to claim 1; It is characterized in that; Described ADC level shifting circuit (3) mainly is made up of precision resistance dividing potential drop and capacitor filter; Be used for converting the 24V current signal of measuring process sensor measurement output to master control board (1) discernible 0-2.5V voltage signal, supply the built-in ADC converter sampling of master control board (1).
8. a kind of SF6 gas density relay checking instrument according to claim 1; It is characterized in that; Adopt ModBus RTU serial communication protocol to carry out exchanges data between man-machine interactive display screen (4) and the master control board (1); Master control board (1) cycle detection display screen state, and real-time response user operation.
9. a kind of SF6 gas density relay checking instrument according to claim 2 is characterized in that, USB interface (5) circuit mainly adopts CH376 file management control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200443580U CN202453470U (en) | 2012-02-13 | 2012-02-13 | Checking instrument for SF6 gas density relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200443580U CN202453470U (en) | 2012-02-13 | 2012-02-13 | Checking instrument for SF6 gas density relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202453470U true CN202453470U (en) | 2012-09-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200443580U Expired - Fee Related CN202453470U (en) | 2012-02-13 | 2012-02-13 | Checking instrument for SF6 gas density relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202453470U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964815A (en) * | 2015-07-01 | 2015-10-07 | 许继（厦门）智能电力设备股份有限公司 | SF6 density relay pressure contact detecting device |
| CN109342938A (en) * | 2018-11-29 | 2019-02-15 | 国网四川省电力公司检修公司 | A kind of SF6 density monitor calibration equipment based on secondary singal |
| CN109521360A (en) * | 2018-12-28 | 2019-03-26 | 广东电网有限责任公司 | Relay contact signal detection apparatus and system |
| CN110361648A (en) * | 2019-07-23 | 2019-10-22 | 国网上海市电力公司 | A kind of sulfur hexafluoride gas density relay method of calibration and system |
| CN110411892A (en) * | 2019-09-04 | 2019-11-05 | 上海乐研电气有限公司 | A kind of contact point signal Acquisition Circuit of scene on-line testing gas density relay |
| CN110542852A (en) * | 2019-09-04 | 2019-12-06 | 上海乐研电气有限公司 | transformation method of gas density relay |
-
2012
- 2012-02-13 CN CN2012200443580U patent/CN202453470U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964815A (en) * | 2015-07-01 | 2015-10-07 | 许继（厦门）智能电力设备股份有限公司 | SF6 density relay pressure contact detecting device |
| CN109342938A (en) * | 2018-11-29 | 2019-02-15 | 国网四川省电力公司检修公司 | A kind of SF6 density monitor calibration equipment based on secondary singal |
| CN109342938B (en) * | 2018-11-29 | 2024-03-15 | 国网四川省电力公司检修公司 | SF6 density relay calibration device based on secondary signal |
| CN109521360A (en) * | 2018-12-28 | 2019-03-26 | 广东电网有限责任公司 | Relay contact signal detection apparatus and system |
| CN110361648A (en) * | 2019-07-23 | 2019-10-22 | 国网上海市电力公司 | A kind of sulfur hexafluoride gas density relay method of calibration and system |
| CN110411892A (en) * | 2019-09-04 | 2019-11-05 | 上海乐研电气有限公司 | A kind of contact point signal Acquisition Circuit of scene on-line testing gas density relay |
| CN110542852A (en) * | 2019-09-04 | 2019-12-06 | 上海乐研电气有限公司 | transformation method of gas density relay |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20150213 |
|
| EXPY | Termination of patent right or utility model |