CN103983538A - Working method of SF6 moisture and density measurement device of SF6 electrical equipment - Google Patents
Working method of SF6 moisture and density measurement device of SF6 electrical equipment Download PDFInfo
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- CN103983538A CN103983538A CN201410214138.1A CN201410214138A CN103983538A CN 103983538 A CN103983538 A CN 103983538A CN 201410214138 A CN201410214138 A CN 201410214138A CN 103983538 A CN103983538 A CN 103983538A
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- gas
- under test
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- exhausr port
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Abstract
The invention relates to a working method of an SF6 moisture and density measurement device of SF6 electrical equipment, wherein the SF6 moisture and density measurement device comprises a joint and a gas exchange chamber; the joint is used for being connected to an exhaust hole of measured equipment; the gas exchange chamber is communicated with the joint; the gas exchange chamber is applied to filling gas from the measured equipment back to the measured equipment. The working method of the SF6 moisture and density measurement device of the SF6 electrical equipment disclosed by the invention is as follows: when the SF6 moisture and density measurement device is not used, the integral body composed of the joint and the gas exchanger chamber is put into drying equipment or a drying agent to be stored; when the SF6 moisture and density measurement device is used, the joint is connected to the exhaust hole of the measured equipment; then, the exhaust hole is opened; gas of the measured equipment is fed into the gas exchanger chamber; after measuring, gas is filled back to the measured equipment; the exhaust hole is closed, and the joint is detached.
Description
The application divides an application, the application number of original application: 201210266155.0, the applying date: 2012-7-30, the micro-water content measuring device > of invention and created name < < >.
Technical field
The present invention relates to a kind of method of work of micro-water content measuring device, especially a kind of for SF
6in electrical equipment to SF
6the method of work of the measurement mechanism that the moisture of gas, density are measured.
Background technology
SF
6(sulfur hexafluoride) gas is widely used in the electrical equipment of high voltage, large capacity, high parameter because of its good insulating property and stable chemical constitution, the high-tension switch gear of normal operation, its SF
6moisture in gas should be lower than 300PPMV, as moisture exceeds standard, can cause switch insulation performance to reduce, cause high-voltage breakdown, due to the decline of insulating property, will near switch ends, produce shelf depreciation, the time has been grown and has easily caused connectivity flashover, directly affect the break performance of high-voltage switch gear, simultaneously SF
6the compound that gas produces after being decomposed by electric arc, can produce corrosive attack to metal object and insulating part, shortens thus the serviceable life of high-voltage switch gear.
Therefore in the use procedure of high-voltage switch gear, must be regularly or irregularly detect the moisture in gas, the measuring method adopting is at present degassing method, specifically on the gas supplementing opening of high-voltage switch gear, connects checkout equipment, then discharges SF
6therefore gas, because extraneous moisture is higher than tens times of measurement of moisture content of gas in switch, need to discharges some minutes and just can reach test balance, and has detected in the protection air chamber that rear discharged gas cannot fill back high-voltage switch gear.There are several defects in this method: first, the rated pressure requirement of impact protection air chamber, causes the frequent tonifying Qi of needs; Secondly, the SF higher to price
6gas causes serious waste; Again, the SF emitting
6can damage field personnel, atmosphere be caused to severe contamination simultaneously.
How providing a kind of wheel shaft and pulley easy to process, that be convenient to environmental-protection box to assemble, is the technical matters that this area will solve.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of simple in structure, safety and environmental protection and is suitable for tested gas to fill back SF
6in electrical equipment, for SF
6in electrical equipment to SF
6the method of work of the device that the moisture of gas, density are measured.
In order to address the above problem, a kind of measurement mechanism provided by the invention, it comprises for connecting the joint of the exhausr port of equipment under test, the gas switch room being communicated with this joint; This gas switch room is for filling back equipment under test by the gas from equipment under test.
Described gas switch room comprises and is suitable for holding the cavity from the gas of equipment under test, and when this gas is filled back to equipment under test, the volume of described cavity can be compressed to zero.
Described gas switch room comprises body, is provided with for this body being divided into the piston of the forward and backward air chamber of gas barrier in body; Described front air chamber is described cavity, and front air chamber is communicated with described joint; Described rear gas chamber is connected with a gas tank, and the air pressure size in this gas tank is the 90-99% of the air pressure in described equipment under test; The piston rod being connected with the rear end face of this piston extends the rear end face of described body, and this piston rod is connected for controlling the displacement drive mechanism driving of this piston rod axial displacement with one.
Pipeline between described joint and gas switch room is provided with the sensor for detection of the gas small water density in this pipeline.
In described joint, be provided with bidirectional non-return valve, this bidirectional non-return valve is suitable for opening when described joint connects the exhausr port of described equipment under test.
Described displacement drive mechanism comprises: body is fixed on the hollow shaft motor on the rear end face of described body, and the hollow rotating shaft of this hollow shaft motor forms nut, and the part of extending described body rear end face of described piston rod forms the screw mandrel coordinating with described nut.
The method of work of above-mentioned measurement mechanism, it comprises:
While not using, the integral body that described joint and gas switch room are formed puts into drying equipment or drying agent is preserved;
During use, after the integral body of described joint and gas switch room formation is taken out from drying equipment or drying agent, rapidly described joint is connected to the exhausr port of equipment under test, then open this exhausr port, the gas of equipment under test is sent into gas switch room, after measurement completes, described gas is filled back to described equipment under test; Close described exhausr port, dismantle described joint.
In the method for work of described measurement mechanism: when opening the exhausr port of equipment under test, when the gas of equipment under test is sent into gas switch room, described front air chamber air inlet, described rear gas chamber is by exhausr port exhaust; After micro-water-mass density measurement completes, described rear gas chamber is connected with a gas tank by exhausr port, and makes the gas in this gas tank be filled with described rear gas chamber; Then, start described displacement drive mechanism, make piston forward displacement, and the gas in described front air chamber is all filled back to described equipment under test.
The present invention has positive effect with respect to prior art: (1) micro-water content measuring device of the present invention is simple in structure, and the gas switch room of employing is applicable to that the gas from equipment under test is filled back to equipment under test and (generally refers to SF
6electrical equipment), in, therefore there is safety, environmental protection and economic feature.(2) tested gas is being filled back to SF
6in process in electrical equipment, adopt the gas in a gas tank to be filled with described rear gas chamber, adopt the displacement forward of displacement drive mechanism driven plunger simultaneously, in the time of can avoiding adopting separately displacement drive mechanism, drive hypodynamic problem; If adopt separately the air pressure driven plunger displacement forward in gas tank, the air pressure in one side gas tank is had relatively high expectations, and causes relevant cost higher; On the other hand, the speed of driven plunger displacement is wayward, and too fast displacement makes the impermeability that piston is cut apart forward and backward air chamber be difficult for ensureing.(3) adopt gas tank to inflate to described rear gas chamber, as long as guarantee that the micro-water of gas in gas tank, density, lower than micro-water-mass density requirement of equipment under test, just can effectively avoid gas switch room on micro-water of equipment under test, the impact of density.With respect to adopting the directly scheme to the inflation of described rear gas chamber of air pump, there is higher stability and reliability.
Accompanying drawing explanation
Fig. 1 is the structural drawing of micro-water content measuring device of embodiment 1;
Fig. 2 is the use structure graph of micro-water content measuring device of the present invention;
Fig. 3 is the modification structures figure of the micro-water content measuring device in Fig. 1;
Fig. 4 is the use structure graph of micro-water content measuring device of embodiment 2;
Fig. 5 is another use structure graph of micro-water content measuring device of embodiment 2;
Fig. 6 is the use structure graph of micro-water content measuring device of embodiment 3.
Embodiment
See Fig. 1 and 2, the water content measuring device that the present embodiment provides comprises: for connecting the joint 2 of the exhausr port of equipment under test 1, and the gas switch room 4 being communicated with this joint 2; In described joint 2, be provided with bidirectional non-return valve, this bidirectional non-return valve is suitable for opening when described joint 2 connects the exhausr port of described equipment under test 1.
Pipeline between described joint 2 and gas switch room 4 is provided with the sensor 3 for detection of the gas small water density in this pipeline, and this sensor 3 shows that for real-time the intelligent control panel of micro-water-mass density value of tested gas is connected with one.The interior caliber of described pipeline is not more than 1mm, so that the gas in described pipeline can reach test balance at short notice.
Described gas switch room 4 comprises body, is provided with the front air chamber 4-1 for this body being divided into gas barrier, the piston 5 of the 4-2 of rear gas chamber in body; Described front air chamber 4-1 is communicated with described joint 2; The described 4-2 of rear gas chamber is connected with a gas tank 8, and the air pressure size in this gas tank 8 is the 90-99% of the air pressure in described equipment under test 1; The piston rod 5-1 being connected with the rear end face of this piston 5 extends the rear end face of described body, and this piston rod 5-1 is connected for controlling the displacement drive mechanism driving of this piston rod 5-1 axial displacement with one.
As Fig. 1, described displacement drive mechanism comprises: body is fixed on the hollow shaft motor 6 on the rear end face of described body, the hollow rotating shaft 6-1 of this hollow shaft motor 6 forms nut, and the part of extending described body rear end face of described piston rod 5-1 forms the screw mandrel coordinating with described nut.The power end of this hollow shaft motor 6 is connected with the motor-drive circuit in described intelligent control panel.
The method of work of above-mentioned micro-water content measuring device, it comprises:
While not using, the integral body that described joint 2 and gas switch room 4 are formed puts into drying equipment or drying agent is preserved.
During use, after described joint 2 and the integral body of gas switch room 4 formations are taken out from drying equipment or drying agent, rapidly described joint 2 is connected to the exhausr port of equipment under test 1, then open this exhausr port, the gas of equipment under test 1 is sent into described front air chamber 4-1, and the described 4-2 of rear gas chamber is by exhausr port 4-3 exhaust; After micro-water-mass density measurement completes, the described 4-2 of rear gas chamber is connected with a gas tank 8 by exhausr port 4-3, and makes the gas in this gas tank 8 be filled with the described 4-2 of rear gas chamber; Then, start described displacement drive mechanism, make piston 5 displacement forward, and the gas in described front air chamber 4-1 is all filled back to described equipment under test 1.Close described exhausr port, dismantle described joint 2.
As a kind of variant of the present embodiment, the sidewall of the described joint 2 of vicinity of described front air chamber 4-1 is provided with the sensor 3 for detection of the gas small water density in this front air chamber 4-1.
Another kind of variant as the present embodiment, adopt an inner ring of bearing 9-1 and the rear end face of described body to be fixedly connected with, the nut coordinating with described screw mandrel is fixedly connected with the outer ring of a bearing 9-1, the outer ring of this bearing 9-1 is fixedly connected with the inner ring of a handwheel 9 simultaneously, and the outward flange of contiguous handwheel 9 is provided with for driving these handwheel 9 rotations, to control the telescopic handgrip 9-2 of described screw mandrel axial displacement.
Embodiment 2
As Fig. 4-5, on the basis of embodiment 1, the water content measuring device of the present embodiment has following modification:
Described gas switch room 4 comprises an air bag 4-4 who is connected with described joint 2, and this air bag 4-4 integral body is located in a high pressure gas holder 11, and high pressure gas holder 11 is connected with an air pump by interface 11-1.Pipeline between described joint 2 and air bag 4-4 entrance is provided with the sensor 3 for detection of the gas small water density in this pipeline.
Before starting working, after the integral body that described joint 2 and high pressure gas holder 11 are formed is taken out from drying equipment or drying agent, rapidly described joint 2 is connected to the exhausr port of equipment under test 1, the volume of air bag 4-4 is now zero, and the air pressure in high pressure gas holder 11 is less than the air pressure in air bag 4-4, as Fig. 4.
Open the exhausr port of this equipment under test 1, when the gas of equipment under test 1 is sent into air bag 4-4, air bag 4-4 volumetric expansion, as Fig. 5; After micro-water-mass density measurement completes, air pump is opened, and when the air pressure in high pressure gas holder 11 is greater than the air pressure in air bag 4-4, the gas in air bag 4-4 all fills back described equipment under test 1, and the volume of air bag 4-4 reverts to zero.
Embodiment 3
As Fig. 4-5, on the basis of embodiment 1, the water content measuring device of the present embodiment has following modification:
Described gas switch room 4 comprises the air bag 4-4 being connected with described joint 2 through an air pump 10, and the pipeline between described joint 2 and air pump 10 is provided with the sensor 3 for detection of the gas small water density in this pipeline.
Before starting working, after the integral body that described joint 2 and high pressure gas holder 11 are formed is taken out from drying equipment or drying agent, rapidly described joint 2 is connected to the exhausr port of equipment under test 1, the volume of air bag 4-4 is now zero.
Open the exhausr port of this equipment under test 1, when the gas of equipment under test 1 is sent into air bag 4-4, air bag 4-4 volumetric expansion, as Fig. 6; After micro-water-mass density measurement completes, air pump 10 is opened, and the gas in air bag 4-4 is all filled back to described equipment under test 1, and the volume of air bag 4-4 reverts to zero.
Obviously, above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And these belong to apparent variation that spirit of the present invention extended out or change still among protection scope of the present invention.
Claims (2)
1. a method of work for measurement mechanism, is characterized in that this measurement mechanism comprises: for connecting the joint (2) of the exhausr port of equipment under test (1), the gas switch room (4) being communicated with this joint (2); This gas switch room (4) is suitable for the gas from equipment under test (1) to fill back in equipment under test (1);
Described gas switch room (4) comprises body, is provided with for this body being divided into the piston (5) of the forward and backward air chamber (4-1,4-2) of gas barrier in body; Described front air chamber (4-1) is communicated with described joint (2);
Described rear gas chamber (4-2) is connected with a gas tank (8);
The piston rod (5-1) being connected with the rear end face of this piston (5) extends the rear end face of described body, and this piston rod (5-1) is connected for controlling the displacement drive mechanism driving of this piston rod (5-1) axial displacement with one;
Above-mentioned method of work comprises: the exhausr port that described joint (2) is connected to equipment under test (1), then open this exhausr port, the gas of equipment under test (1) is sent into gas switch room (4), after having measured, described gas is filled back to described equipment under test (1); Close described exhausr port, dismantle described joint (2).
2. the method for work of measurement mechanism according to claim 1, it is characterized in that: when opening the exhausr port of equipment under test (1), when the gas of equipment under test (1) is sent into gas switch room (4), described front air chamber (4-1) air inlet, described rear gas chamber (4-2) is by exhausr port (4-3) exhaust;
After micro-water-mass density measurement completes, described rear gas chamber (4-2) is connected with a gas tank (8) by exhausr port (4-3), and makes the gas in this gas tank (8) be filled with described rear gas chamber (4-2);
Then, start described displacement drive mechanism, make piston (5) displacement forward, and the gas in described front air chamber (4-1) is all filled back to described equipment under test (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410214138.1A CN103983538B (en) | 2012-07-30 | 2012-07-30 | SF 6the SF of electrical equipment 6the method of work of moisture, density measuring equipment |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410214138.1A CN103983538B (en) | 2012-07-30 | 2012-07-30 | SF 6the SF of electrical equipment 6the method of work of moisture, density measuring equipment |
| CN201210266155.0A CN102768166B (en) | 2012-07-30 | 2012-07-30 | Micro water density measuring device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210266155.0A Division CN102768166B (en) | 2012-07-30 | 2012-07-30 | Micro water density measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103983538A true CN103983538A (en) | 2014-08-13 |
| CN103983538B CN103983538B (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410214138.1A Active CN103983538B (en) | 2012-07-30 | 2012-07-30 | SF 6the SF of electrical equipment 6the method of work of moisture, density measuring equipment |
| CN201210266155.0A Active CN102768166B (en) | 2012-07-30 | 2012-07-30 | Micro water density measuring device |
| CN201410214542.9A Active CN103954530B (en) | 2012-07-30 | 2012-07-30 | For SF6In electrical equipment to SF6The moisture of gas, the device that density is measured |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210266155.0A Active CN102768166B (en) | 2012-07-30 | 2012-07-30 | Micro water density measuring device |
| CN201410214542.9A Active CN103954530B (en) | 2012-07-30 | 2012-07-30 | For SF6In electrical equipment to SF6The moisture of gas, the device that density is measured |
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| CN (3) | CN103983538B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252683A (en) * | 2013-05-07 | 2013-08-21 | 天津大学 | Five-freedom-degree parallel-serial numerically-controlled machine tool |
| CN104297430A (en) * | 2014-10-21 | 2015-01-21 | 上海乐研电气科技有限公司 | SF6 gas monitoring device, method and system of high-voltage electrical equipment |
| CN109297958B (en) * | 2018-11-13 | 2021-08-17 | 国网四川省电力公司成都供电公司 | Be used for real time monitoring SF6 power equipment insulating gas decomposition product colour development early warning device |
| CN109364702A (en) * | 2018-11-15 | 2019-02-22 | 广东电网有限责任公司 | A kind of mechanical electrical treatment device of SF6 equipment Moisture high UCL |
| CN109224788A (en) * | 2018-11-15 | 2019-01-18 | 广东电网有限责任公司 | A kind of SF6 equipment Moisture high UCL vapour-pressure type electrical treatment device |
| CN113551704B (en) * | 2021-07-09 | 2022-08-09 | 山西辉能科技有限公司 | Transmitter for online micro water density |
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- 2012-07-30 CN CN201410214542.9A patent/CN103954530B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102768166B (en) | 2014-04-16 |
| CN102768166A (en) | 2012-11-07 |
| CN103983538B (en) | 2016-03-23 |
| CN103954530A (en) | 2014-07-30 |
| CN103954530B (en) | 2016-05-04 |
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Address after: 225400 Jiangsu Province, Taixing City Industrial Park Xiangrong Road No. 18 Patentee after: Chang Xing Address before: 213000 Jiangsu City, Changzhou Province New District, Qinling Mountains Road, No. 7 (formerly 3-1) Changzhou City Electric Co., Ltd. Patentee before: Chang Xing |
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Address after: No.1 Workshop, private industrial park, Xuzhuang street, Gaogang District, Taizhou City, Jiangsu Province Patentee after: Chang Xing Address before: 225400 Jiangsu Province, Taixing City Industrial Park Xiangrong Road No. 18 Patentee before: Chang Xing |