CN107064792B - SF (sulfur hexafluoride)6Gas density relay calibrator - Google Patents
SF (sulfur hexafluoride)6Gas density relay calibrator Download PDFInfo
- Publication number
- CN107064792B CN107064792B CN201710402628.8A CN201710402628A CN107064792B CN 107064792 B CN107064792 B CN 107064792B CN 201710402628 A CN201710402628 A CN 201710402628A CN 107064792 B CN107064792 B CN 107064792B
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- China
- Prior art keywords
- microprocessor
- relay
- switch contact
- state detection
- contact state
- Prior art date
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- 229910018503 SF6 Inorganic materials 0.000 title 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title 1
- 229960000909 sulfur hexafluoride Drugs 0.000 title 1
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 238000005070 sampling Methods 0.000 claims description 19
- 238000004891 communication Methods 0.000 claims description 14
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052744 lithium Inorganic materials 0.000 claims description 6
- 210000003437 trachea Anatomy 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses an SF6 gas density relay calibrator which comprises a microprocessor, a relative pressure sensor connected with the microprocessor through signals, a temperature sensor connected with the microprocessor through signals, and a switch contact point state detection circuit connected with the microprocessor through signals, wherein the switch contact point state detection circuit is electrically connected with a contact point of the SF6 gas density relay. The calibrator can timely collect the density of gas according to the change of the contact state of the relay so as to ensure the calibration precision.
Description
Technical Field
The invention relates to a relay calibrator, in particular to an SF 6 gas density relay calibrator.
Background
SF6 electrical products are widely applied to the power departments and industrial and mining enterprises, and the rapid development of the power industry is promoted. How to ensure reliable and safe operation of SF6 electrical products has become one of the important tasks of the power sector. The SF6 gas density relay is one of key elements of an SF6 electrical switch, is used for detecting the change of SF6 gas density in an SF6 electrical equipment body, and the performance of the SF6 gas density relay directly influences the reliable and safe operation of the SF6 electrical equipment. The SF6 gas density relay installed on site often has inflexible action or poor contact after a period of time, and sometimes has poor temperature compensation performance, and the SF6 gas density relay is easy to malfunction when the ambient temperature changes. Therefore, the original electric power department formulates DL/T596-1996, electric power equipment preventive test procedure, and twenty-five key requirements for preventing major accidents of electric power production. The test protocol and requirements both specify: each SF6 electrical switch usage unit should periodically verify the SF6 gas density relay. From the practical operation condition, the periodic verification of the SF6 gas density relay on site is one of the necessary means for preventing and ensuring the safe and reliable operation of the power equipment.
In a sealed container, the SF6 gas pressure at a temperature may represent the SF6 gas density. In order to be able to unify, it is customary to use the relative pressure value of SF6 gas at 20 ℃ as a representative value of its corresponding density. Therefore, the SF6 gas density relays each have the pressure of SF6 gas at 20 ℃ as a scale value. During on-site verification, under different ambient temperatures, the measured pressure values are converted into standard pressure values corresponding to 20 ℃, so that the performance of the SF6 gas density relay is judged.
Disclosure of Invention
The invention mainly aims to provide an SF 6 gas density relay calibrator, which improves the prior art so as to ensure the calibrator to be more sensitive and ensure the calibration precision.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a SF6 gas density relay check gauge, includes microprocessor, the relative pressure sensor who is connected with microprocessor signal and the temperature sensor who is connected with microprocessor signal, relative pressure sensor passes through the trachea and is connected with SF6 gas density relay, its characterized in that still includes the switch contact state detection circuit who is connected with microprocessor signal, switch contact state detection circuit is connected with SF6 gas density relay's contact electricity.
Preferably, the system also comprises a storage module in signal connection with the microprocessor.
Preferably, the system further comprises a communication module in signal connection with the microprocessor.
Preferably, the communication module is a wireless communication module.
Preferably, an absolute pressure sensor is also included in signal communication with the microprocessor.
Preferably, the lithium battery is further included, and the lithium battery is used for supplying power to the whole calibrator.
Preferably, the device further comprises a shell, and the microprocessor, the opposite pressure sensor and the switch contact state detection circuit are arranged in the shell.
Preferably, a contact sampling port and a pressure sampling port are arranged on the shell, the outer end of the contact sampling port is connected with a contact of the relay, the inner end of the contact sampling port is connected with the switch contact state detection circuit, the outer end of the pressure sampling port is communicated with the relay through an air pipe, and the inner end of the pressure sampling port is communicated with the opposite pressure sensor through the air pipe.
Preferably, a multicore connector is arranged at the position of the switch contact, a plurality of cores in the multicore connector are connected with the processor through corresponding switch contact state detection circuits except the common terminal, and the outer ends of the cores are connected with different switch contacts of the relay.
Compared with the prior art, the invention has the following beneficial effects:
The check gauge is added with the switch contact state detection circuit on the basis of the prior art, and can timely judge whether the state of the relay is changed or not through the switch contact state detection circuit, and if the state is changed, the check gauge immediately locks the current density value, so that the check precision is ensured.
Drawings
FIG. 1 is a control schematic diagram according to a preferred embodiment of the present invention
FIG. 2 is an external structural view of a preferred embodiment according to the present invention
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
As shown in fig. 1, the check meter for the SF 6 gas density relay comprises a microprocessor 4, a relative pressure sensor 6 in signal connection with the microprocessor 4, and a temperature sensor 8 in signal connection with the microprocessor 4, wherein the relative pressure sensor 6 is connected with the SF 6 gas density relay through an air pipe and further can detect the relative pressure (relative to the atmospheric pressure) of the SF 6 gas passing through the SF6 gas density relay through the relative pressure sensor 6, the temperature sensor 8 is used for detecting the temperature in the atmosphere, the temperature in the atmosphere is approximately the same as the temperature of the SF 6 gas, the microprocessor 4 can acquire the pressure value and the temperature value in real time, and can convert the acquired relative pressure value at a certain temperature value into the relative pressure value of the SF 6 gas at 20 ℃ through a conversion module and display the relative pressure value through a liquid crystal screen 1, and then judge whether the density relay fails or not through comparing the pressure value of the check meter with the pressure value of the density relay. The conversion module is of prior art and will not be described in detail here.
The calibrator further comprises a storage module 3 in signal connection with the microprocessor 4, wherein the storage module 3 is used for storing the relative pressure value and the temperature value. The memory module 3 is of prior art and will not be described in detail here. The data stored in the memory module 3 can be searched by the corresponding operation, and the conventional density value can be searched.
In order to timely realize the checking instrument, the checking instrument further comprises a switch contact state detection circuit 5, the switch contact state detection circuit 5 is electrically connected with the switch contact of the relay, and when the switch contact state detection circuit 5 detects that the switch contact state of the relay changes, the checking instrument immediately locks the current density value and displays the current density value on the liquid crystal screen, and data are stored. That is, when the SF 6 leaks, the state of the switching contact of the relay changes, for example, from on to off or from off to on, and the microprocessor 4 immediately stores the detected SF 6 density value after detecting the change in the state of the contact by the switching contact state detection circuit 5. The principle of the switch contact state detection circuit 5 is prior art and will not be described in detail here.
The calibrator further comprises a communication module 2 in signal connection with the microprocessor 4, the communication module 2 is a wireless communication module, and the microprocessor 4 can send acquired data to the server through the wireless communication module 2, so that corresponding data can be conveniently acquired by accessing the server through the client. The communication module 2 is of a prior art, and will not be described in detail here.
The calibrator further comprises an absolute pressure sensor 7 in signal connection with the microprocessor 4, the pressure sensor can acquire atmospheric pressure through the absolute pressure sensor 7, and the environment around the relay can be judged through the atmospheric pressure so as to take corresponding measures to ensure the normal operation of the relay. And, the absolute pressure of SF 6 gas can be obtained by the sum of the relative pressure of SF 6 and the atmospheric pressure.
The calibrator further comprises a lithium battery 9, and the lithium battery 9 provides electric quantity for the microprocessor 4, the storage module 3, the communication module 2 and the like.
As shown in fig. 2, the calibrator further includes a housing 101, and the liquid crystal display 1, the communication module 2, the storage module 3, the microprocessor 4, the switch contact state detection circuit 5, the relative pressure sensor 6, the absolute pressure sensor 7, the temperature sensor 8, and the lithium battery 9 are disposed in the housing 101.
The top of casing 101 is provided with contact sampling mouth 102 and pressure sampling mouth 103 respectively, the inner of pressure sampling mouth 103 communicates with relative pressure sensor 6 through the trachea, the outer end of pressure sampling mouth 103 communicates with the relay through the trachea, the inner of contact sampling mouth 102 passes through the wire and links to each other with switch contact state detection circuit 5, the outer end of contact sampling mouth 102 passes through the wire and is connected with the contact of relay, and when the contact state changed, microprocessor 4 immediately converts the pressure value that relative pressure sensor 6 detected into the density value and saves.
The four-core aviation connector is arranged at the contact sampling port 102, one core of the four-core aviation connector is a public end, the outer ends of the other three cores are connected with different switch contacts on the relay, the inner ends of the four cores are respectively connected with the processor 4 through corresponding switch contact state detection circuits 5, when the states of different switch contacts on the relay change, the processor 4 immediately collects the pressure of SF 6 gas in the relay, and the collected pressure is compared with the pressure displayed by the relay to judge whether the relay fails.
The foregoing shows that the verification apparatus further comprises and describes the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. The utility model provides a SF 6 gas density relay check gauge, includes casing, microprocessor, the relative pressure sensor of being connected with microprocessor signal and the temperature sensor of being connected with microprocessor signal, relative pressure sensor passes through the trachea and is connected with SF 6 gas density relay, and characterized by still includes the switch contact state detection circuit of being connected with microprocessor signal, switch contact state detection circuit is connected with SF 6 gas density relay's contact electricity; when the switch contact state detection circuit detects that the switch contact state of the relay is changed, the calibrator immediately locks the current density value and stores the current density value;
the microprocessor, the opposite pressure sensor and the switch contact state detection circuit are arranged in the shell;
The shell is provided with a contact sampling port and a pressure sampling port, the outer end of the contact sampling port is connected with a contact of the relay, the inner end of the contact sampling port is connected with a switch contact state detection circuit, the outer end of the pressure sampling port is communicated with the relay through an air pipe, and the inner end of the pressure sampling port is communicated with a relative pressure sensor through an air pipe;
the system also comprises a storage module connected with the microprocessor through signals;
The communication module is connected with the microprocessor through signals;
the communication module is a wireless communication module;
The system also comprises an absolute pressure sensor in signal connection with the microprocessor;
the lithium battery is used for supplying power to the whole calibrator;
The multi-core connector is arranged at the position of the switch contact, a plurality of cores in the multi-core connector are connected with the public end, the inner ends of the other cores are respectively connected with the processor through corresponding switch contact state detection circuits, and the outer ends of the cores are connected with different switch contacts of the relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710402628.8A CN107064792B (en) | 2017-06-01 | 2017-06-01 | SF (sulfur hexafluoride)6Gas density relay calibrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710402628.8A CN107064792B (en) | 2017-06-01 | 2017-06-01 | SF (sulfur hexafluoride)6Gas density relay calibrator |
Publications (2)
| Publication Number | Publication Date |
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| CN107064792A CN107064792A (en) | 2017-08-18 |
| CN107064792B true CN107064792B (en) | 2024-08-06 |
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| CN201710402628.8A Active CN107064792B (en) | 2017-06-01 | 2017-06-01 | SF (sulfur hexafluoride)6Gas density relay calibrator |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110534377A (en) * | 2019-09-04 | 2019-12-03 | 上海乐研电气有限公司 | A kind of non-maintaining gas density relay |
| CN110411892B (en) * | 2019-09-04 | 2024-07-23 | 上海乐研电气有限公司 | Contact signal acquisition circuit for on-site on-line checking gas density relay |
| CN110542854B (en) * | 2019-09-04 | 2021-11-30 | 上海卓电电气有限公司 | Online calibration method of gas density relay |
| CN112798398A (en) * | 2020-12-30 | 2021-05-14 | 广西电网有限责任公司电力科学研究院 | Be used for GIS density relay gas pressure testing arrangement |
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| CN2281542Y (en) * | 1996-08-31 | 1998-05-13 | 重庆渝州大学科技开发总公司 | Miniature semiautomatic digital display instrument for determining dielectric strength of dielectric oil |
| CN202133757U (en) * | 2011-06-27 | 2012-02-01 | 常州爱特科技有限公司 | Automatic check meter for SF6 density relay |
| CN206945915U (en) * | 2017-06-01 | 2018-01-30 | 上海上芃电气有限公司 | A kind of SF6Gas density relay checking instrument |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2687689Y (en) * | 2003-12-26 | 2005-03-23 | 西南师范大学 | Portable signal generation calibrating instrument |
| CN201004042Y (en) * | 2007-01-09 | 2008-01-09 | 苏丽芳 | SF6 air density relay calibrator |
| CN201242498Y (en) * | 2008-06-23 | 2009-05-20 | 郑州赛奥电子有限公司 | Density relay tester |
| CN101937060B (en) * | 2010-09-09 | 2013-03-06 | 辽宁省电力有限公司抚顺供电公司 | Checking system and checking method for sulfur hexafluoride density relay |
| CN202511823U (en) * | 2012-04-20 | 2012-10-31 | 金惠玉 | Temperature and pressure synchronous tester |
| CN103913704A (en) * | 2013-01-07 | 2014-07-09 | 王金胜 | Full-automatic SF6 gas density relay calibration instrument capable of recycling gas |
| US9696248B2 (en) * | 2014-04-29 | 2017-07-04 | Solon Manufacturing Company | Gas insulated switchgear monitoring apparatus and method |
| CN205450209U (en) * | 2016-03-31 | 2016-08-10 | 北京康斯特仪表科技股份有限公司 | Detect device of pressure switch switching value |
| CN206161810U (en) * | 2016-11-11 | 2017-05-10 | 广东电网有限责任公司江门供电局 | Intelligent control box relay test appearance |
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| CN2281542Y (en) * | 1996-08-31 | 1998-05-13 | 重庆渝州大学科技开发总公司 | Miniature semiautomatic digital display instrument for determining dielectric strength of dielectric oil |
| CN202133757U (en) * | 2011-06-27 | 2012-02-01 | 常州爱特科技有限公司 | Automatic check meter for SF6 density relay |
| CN206945915U (en) * | 2017-06-01 | 2018-01-30 | 上海上芃电气有限公司 | A kind of SF6Gas density relay checking instrument |
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| Publication number | Publication date |
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| CN107064792A (en) | 2017-08-18 |
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