阅读说明：本技术 一种gis或gil设备的金属粉尘吸附与积聚电荷的观测装置 (observing device for metal dust adsorption and accumulated charges of GIS or GIL equipment ) 是由 李庆民 梁瑞雪 王健 胡琦 王靖瑞 常亚楠 于 2019-09-23 设计创作，主要内容包括：本发明提供了一种用于气体绝缘金属封闭开关(GIS)或气体绝缘金属封闭输电线路(GIL)的观测装置,该装置可同时观测金属粉尘的动态吸附与气-固界面的积聚电荷,能够同时实现绝缘件表面电荷的快速、准确测量及粉尘吸附行为的观察,对于分析GIS/GIL中表面电荷积聚和金属粉尘吸附之间的交互作用规律,控制闪络故障具有重要意义。(the invention provides an observation device for a gas insulated metal enclosed switch (GIS) or a gas insulated metal enclosed transmission line (GIL), which can simultaneously observe the dynamic adsorption of metal dust and the accumulated charges of a gas-solid interface, can simultaneously realize the rapid and accurate measurement of the surface charges of an insulating part and the observation of dust adsorption behaviors, and has important significance for analyzing the interaction rule between the surface charge accumulation and the metal dust adsorption in the GIS/GIL and controlling flashover faults.)

1. The utility model provides a GIS or GIL equipment's metal dust adsorbs and gathers observation device of electric charge for GIS or GIL equipment surface metal dust adsorbs and gathers the integration observation of electric charge, its characterized in that: the device comprises a sealed pressure-resistant cavity 1, a coaxial cylindrical electrode test platform 2, a high-voltage bushing 3, a guide rail and probe mechanism 4, a rotation control mechanism 5, a guide rail slide block control center 6 and a data processing unit 7;

The pressure-resistant cavity 1 is L-shaped octahedral, an air charging and discharging tee 11 and an air pressure meter 12 are arranged on the upper wall surface of the pressure-resistant cavity 1, an observation window 13 is arranged on the rear wall surface of the pressure-resistant cavity 1, an observation window 14 is further arranged at the position of the front wall surface opposite to the observation window 13, an observation window 15 is arranged on the side wall of the pressure-resistant cavity 1, and the adsorption state of metal dust is shot by a camera through the observation window 15;

The coaxial cylindrical electrode test platform 2 is horizontally arranged in the pressure-resistant cavity 1 and comprises an L-shaped high-voltage electrode 21, a coaxial cylindrical electrode shell 22 at a fixed position, a basin-type insulator 23 and a movable coaxial cylindrical electrode shell 24; the high-voltage electrode 21, the coaxial cylindrical electrode shell 22 at the fixed position and the basin-type insulator 23 are connected with each other; the movable coaxial cylindrical electrode shell 24 is provided with brackets 2411, 2412, 2413 and 2414, the brackets 2411 and 2412 are installed on a sliding guide rail 2421, the brackets 2413 and 2414 are installed on a sliding guide rail 2422, and the sliding guide rails 2421 and 2422 are installed on the upper inner wall and the lower inner wall of the pressure-resistant cavity 1;

The guide rail and probe mechanism 4 comprises a guide rail axial guide rail 44, an inclined guide rail 45, a bracket and rotating mechanism 41 and a capacitance probe 46, wherein the capacitance probe 46 is arranged on the inclined guide rail 45 and is connected to the axial guide rail 44 through a bracket 43, one end of the bracket 42 is connected with the guide rail 44, and the middle part of the bracket is connected with the inner shaft rotating mechanism 41;

The rotation control mechanism 5 is connected with the inner shaft rotation mechanism 41, the guide rail sliding block control center 6 is connected with the data processing unit 7, and the high-voltage electrode 21 is connected with the high-voltage bushing 3;

The inner shaft rotating mechanism 41 of the guide rail and probe mechanism 4 can drive the capacitance probe 46 to rotate 360 degrees, the axial guide rail 44 can enable the capacitance probe 46 to move up and down, the inclined guide rail 45 can enable the capacitance probe 46 to move linearly along the surface of the basin-type insulator 23, and the capacitance probe 46 is used for detecting the accumulation state of charges.

2. The observation device for metal dust adsorption and accumulated charge of GIS or GIL equipment according to claim 1, wherein: the sealed pressure-resistant cavity 1 can bear the air pressure of 0.6MPa, and different air pressures are obtained by filling pure SF6 gas or mixed gas of SF6 and N2.

3. The observation device for metal dust adsorption and accumulated charge of GIS or GIL equipment according to claim 1, wherein: the coaxial cylindrical electrode platform test platform 2 comprises a coaxial cylindrical electrode shell 22 at a fixed position and a movable coaxial cylindrical electrode shell 24, and when the coaxial cylindrical electrode platform test platform is pressurized, the electrode shell 22 and the electrode shell 24 are closed, so that electric charges are accumulated on the surface of the insulator 23; during measurement, the movable coaxial cylindrical electrode shell 24 moves towards the high-voltage sleeve 3, and segmented observation of metal dust adsorption and charge accumulation dynamic processes is realized.

4. the observation device for metal dust adsorption and accumulated charge of GIS or GIL equipment according to claim 1, wherein: the axial guide rail 44 controls the capacitance probe 46 to be far away from the high-voltage electrode 21; during measurement, the axial guide rail 44 and the inclined guide rail 45 are controlled together to enable the probe 46 to reach a specified measurement position.

Technical Field

The invention belongs to the field of gas-solid interface electrical insulation, and particularly relates to the field of measurement of the movement behavior and surface charge of metal particles adsorbed on the surface of gas insulated metal enclosed switch (GIS) or gas insulated metal enclosed transmission line (GIL) equipment.

Background

The adsorption of metal particles and the charge accumulation on the surface of an insulator in gas insulated metal enclosed switch (GIS) or gas insulated metal enclosed transmission line (GIL) equipment are main influencing factors causing the flashover fault of the GIS/GIL equipment along the surface, and account for more than 50 percent of the total fault rate. Most of the adsorbed metal particles are micron-level or even nano-level metal dust, for example, when a basin-type insulator fails, the metal dust can be polarized and moved under the action of multiple fields such as an electro-magnetic-thermal-flow field and the like, and finally deposited on the surface of an insulator, so that the insulator flashover failure is caused. In the process of adsorbing the metal dust on the surface of the insulator, the accumulated charges on the surface of the insulator are changed continuously, the change of the charges on the surface of the insulator changes the movement direction of the dust, and the two influences mutually, so that in order to control the flashover fault, the interaction between the adsorption behavior of the metal dust and the accumulated charges on the gas-solid interface of the GIS or GIL equipment needs to be researched. However, most of the current experimental observation devices can only respectively observe the motion behavior of the metal particles or measure the surface charge, and cannot combine the two together, so that the research efficiency of the interaction between the dynamic adsorption of the particles and the gas-solid interface is limited.

the realization of simultaneous observation of the motion behavior of metal dust and measurement of surface charge is the basis for comprehensive research of the interaction, and the solution of the problems of simultaneous observation of the motion behavior of metal particles adsorbed on the surface of equipment and measurement of the charge accumulated on the surface is one of the urgent needs in the industry.

Disclosure of Invention

The invention provides an observation device for a gas insulated metal enclosed switch (GIS) or a gas insulated metal enclosed transmission line (GIL), which can simultaneously observe the dynamic adsorption of metal dust and the accumulated charges of a gas-solid interface. The device comprises a sealed pressure-resistant cavity 1, a coaxial cylindrical electrode test platform 2, a high-voltage bushing 3, a guide rail and probe mechanism 4, a rotation control mechanism 5, a guide rail slide block control center 6 and a data processing unit 7.

The pressure cavity 1 is L-shaped octahedral, an air inflation and deflation tee joint 11 and an air pressure gauge 12 are arranged on the upper wall surface of the pressure cavity, an observation window 13 is arranged on the rear wall surface of the pressure cavity 1, an observation window 14 is further arranged at the position of the front wall surface opposite to the observation window 13, and an observation window 15 is arranged on the side wall surface of the pressure cavity 1.

The coaxial cylindrical electrode test platform 2 is horizontally arranged in the pressure-resistant cavity 1 and comprises a high-voltage electrode 21, a coaxial cylindrical electrode shell 22 at a fixed position, a basin-type insulator 23 and a movable coaxial cylindrical electrode shell 24; the high-voltage electrode 21, the coaxial cylindrical electrode shell 22 at the fixed position and the basin-type insulator 23 are connected with each other; the movable coaxial cylindrical electrode shell 24 is provided with brackets 2411, 2412, 2413 and 2414, the brackets 2411 and 2412 are arranged on a sliding guide rail 2421, the brackets 2413 and 2414 are arranged on a sliding guide rail 2422, and the sliding guide rails 2421 and 2422 are arranged on the upper inner wall and the lower inner wall of the pressure-resistant cavity 1.

the guide rail and probe mechanism 4 comprises a guide rail axial guide rail 44, an inclined guide rail 45, a bracket and rotating mechanism 41 and a capacitance probe 46, wherein the capacitance probe 46 is arranged on the inclined guide rail 45 and is connected to the axial guide rail 44 through a bracket 43, one end of the bracket 42 is connected with the guide rail 44, and the middle of the bracket is connected with the inner shaft rotating mechanism 41.

The rotation control mechanism 5 is connected with the inner shaft rotation mechanism 41, the guide rail slide block control center 6 is connected with the data processing unit 7, and the high-voltage electrode 21 is connected with the high-voltage bushing 3.

The sealed pressure-resistant cavity 1 can bear the air pressure of 0.6MPa, and can meet the requirements of different air pressure test conditions such as filling pure SF6 or SF6/N2 mixed gas and the like.

the inner shaft rotating mechanism 41 of the guide rail and probe mechanism 4 can drive the capacitance probe 46 to rotate 360 degrees, the axial guide rail 44 can enable the probe 46 to move up and down, and the inclined guide rail 45 can enable the capacitance probe 46 to move linearly along the surface of the basin-type insulator 23.

The coaxial cylindrical electrode platform test platform 2 comprises a coaxial cylindrical electrode shell 22 and a movable coaxial cylindrical electrode shell 24 which are fixed in position, and when the coaxial cylindrical electrode platform test platform is pressurized, the electrode shell 22 and the electrode shell 24 are closed to enable the surface of the insulator 23 to accumulate electric charges; during measurement, the movable coaxial cylindrical electrode shell 24 moves towards the high-voltage sleeve 3, and segmented observation of metal dust adsorption and charge accumulation dynamic processes is realized.

The axial guide rail 44 controls the probe to be far away from the high-voltage electrode; during measurement, the axial guide rail 44 and the inclined guide rail 45 are controlled together to enable the probe 46 to reach a specified measurement position.

ADVANTAGEOUS EFFECTS OF INVENTION

The invention has the beneficial effects that: the observation device for the gas insulated metal enclosed switch (GIS) or the gas insulated metal enclosed transmission line (GIL) provided by the invention has the advantages of comprehensive functions, convenience in control, safety, reliability and the like, can simultaneously realize quick and accurate measurement of surface charges of an insulating part and observation of dust adsorption behaviors, and has important practical significance for analyzing an interaction rule between surface charge accumulation and metal dust adsorption in the GIS/GIL.

Drawings

FIG. 1 is a schematic view of the observation device according to the present invention;

FIG. 2 is a plan view showing the arrangement of front and rear glass windows of a pressure-resistant chamber of an observation device according to the present invention

FIG. 3 shows the adsorption state of aluminum dust at different pressures for 2min, which was photographed by a camera

FIG. 4 shows the adsorption state of aluminum dust at different pressures for 5min, which was photographed by a camera

FIG. 5 is a state of charge accumulation at 2min of detected adsorption

Fig. 6 is reference numerals of the charge accumulation state at 5min of detected adsorption:

1, a pressure-resistant cavity;

2 a coaxial cylindrical electrode test platform;

3 high-voltage bushing

4 guide rail and probe mechanism

5 rotation control mechanism

6 guide rail slide block control center

7 data processing unit

11 inflation and deflation tee joint

12 air pressure gauge

13. 14 observation window

21 high-voltage electrode

22-fixed-position coaxial cylindrical electrode shell

23 basin type insulator

24 movable coaxial cylinder electrode shell

2411. 2412, 2413 and 2414 support

2421. 2422A sliding guide rail

31 insert

32 high-voltage lead

41 support and rotating mechanism

42 support

43 support

44 axial guide rail

45 inclined plane guide rail

46 capacitance probe

71 electrometer module

72 data processing center

Detailed Description

the invention is further explained below with reference to the figures and examples.