CN-122017389-A - Gas corrosion aging experimental device and method

Abstract

The invention discloses a gas corrosion aging experiment device and method, comprising a sealing box, a reaction kettle and a support, wherein a thermal management system, a heating system and a cooling system are arranged in the sealing box, a plurality of reaction kettles are arranged in the sealing box, the reaction kettle comprises a reaction kettle cavity, the top of the reaction kettle cavity is connected with a sealing cover, the bottom of the reaction kettle cavity is provided with an air inlet hole, the top of the reaction kettle cavity is provided with an air outlet hole, the support is arranged in the reaction kettle cavity, and the support carries a resistor sheet to be tested. The three-in-one coupling aging simulation of the resistor disc under the special gas environment is realized.

Inventors

• ZHANG CHI
• Feng Enhao
• LI BINBIN
• ZHOU JIANGHONG

Assignees

• 中国西电集团有限公司

Dates

Publication Date

20260512

Application Date

20251229

Claims (10)

1. 1. The gas corrosion aging experimental device is characterized by comprising a sealing box, a reaction kettle (1) and a bracket; The heat-insulating type electric resistance meter is characterized in that a heat management system, a heating system and a cooling system are arranged in a sealing box, a plurality of reaction kettles (1) are arranged in the sealing box, each reaction kettles (1) comprises a reaction kettle cavity (1), a sealing cover (4) is connected to the top of each reaction kettle cavity (1), an air inlet hole (3) is formed in the bottom of each reaction kettle cavity (1), an air outlet hole (2) is formed in the top of each reaction kettle cavity (1), and a support is arranged in each reaction kettle cavity (1) and carries resistance sheets to be tested.
2. 2. The gas corrosion aging experimental device according to claim 1, wherein polytetrafluoroethylene coatings are coated on the inner wall of the reaction kettle cavity (1) and the inner surface of the sealing cover (4), electrode extension holes (5) are formed in the sealing cover (4), and the electrode extension holes (5) are located at the edge of the sealing cover (4).
3. 3. The gas corrosion aging experimental device according to claim 1, wherein the gas inlet hole (3) is provided with a gas inlet connecting piece (7), at least six gas inlet plugs (8) are integrated in the gas inlet connecting piece (7), the gas outlet hole (2) is internally provided with a gas outlet plug (6), and the cross section area of the gas outlet channel is 0.8 to 1.4 times of the total cross section area of all channels in the gas inlet area.
4. 4. The gas corrosion aging test apparatus according to claim 1, wherein the support comprises a vertical structure and a horizontal structure, the vertical structure comprises a main shaft, an auxiliary rod and a sliding collar, the electrode passes through an electrode extension hole (5) to be connected with the top of the main shaft, and the horizontal structure is a tray.
5. 5. The gas corrosion aging test apparatus according to claim 4, wherein the sliding collar is slidably connected to the main shaft, the tray is formed by a plurality of support plates arranged in an annular shape, the inner ends of the support plates are hinged to the main shaft, one end of the auxiliary rod is hinged to the sliding collar, the other end of the auxiliary rod is hinged to the corresponding support plate, and the tray has a horizontal unfolded state and a vertical folded state on the main shaft.
6. 6. The gas corrosion aging test apparatus according to claim 5, wherein the sliding collar is provided with a spring pin, and the spindle is provided with a positioning groove at a position corresponding to the sliding collar.
7. 7. The gas corrosion aging test apparatus according to claim 6, wherein the number of the trays is plural and the trays are arranged in a group, the trays positioned below in each group are horizontally unfolded from bottom to top, the trays positioned above are horizontally unfolded from top to bottom, the height of the gap between the two trays in the same group is consistent with the thickness of the resistor disc to be tested, and the trays are provided with positioning grooves.
8. 8. The gas corrosion aging test device according to claim 5, wherein the support is made of copper, the outer side of the support is coated with corrosion-resistant paint in a full-coverage mode, the surface area of the tray is not larger than one half of the sectional area of the reaction kettle cavity (1), the support plates are arranged at intervals, and the contact area of the tray and the resistor to be tested is not larger than one half of the surface area of the end face of the resistor to be tested.
9. 9. A gas etching aging test method based on the test apparatus according to any one of claims 1 to 8, comprising the steps of: Placing a bracket into a reaction kettle cavity (1), placing a resistor disc to be tested on the bracket, connecting the top of the bracket with an external power supply through an electrode extension hole (5), and mounting a sealing cover (4) on the top of the reaction kettle cavity (1); Etching gas enters from the bottom of the reaction kettle cavity (1) through the air inlet hole (3) and is discharged from the top through the air outlet hole (2); and starting a thermal management system, heating according to a set heating rate through a heating system, reading the temperature in real time through a temperature monitoring sensor, and regulating the ambient temperature in the reaction kettle cavity (1) through a cooling system.
10. 10. The gas corrosion aging test method according to claim 9, wherein after the corrosive gas environment and the temperature environment reach steady state, an external high-voltage power supply is connected into the bracket through an electrode extension hole (5) to apply high-voltage pulse or current to the resistor to be tested, and the other end of the external electrode is connected to the detection loop to collect the resistance data of the resistor to be tested.

Description

Gas corrosion aging experimental device and method Technical Field The invention belongs to the field of high-voltage switch equipment detection, and relates to a gas corrosion aging experiment device and method. Background Switching resistors are commonly used circuit protection devices in high-voltage switching devices. The resistor sheet in the closing resistor is in SF 6 gas atmosphere for a long time, and long-term corrosion influence can exist, so that the resistance value of the resistor sheet is reduced. And when the device is disconnected, partial discharge phenomenon exists in microcosmic due to the influence of overvoltage, and a large amount of heat is generated at the same time, so that the original chemical reaction speed can be accelerated. Conventional gas corrosion detection equipment generally utilizes several gases to accelerate corrosion of materials or products in an environment with certain temperature and relative humidity, and simulates the long-time aging result of the materials in the actual environment. However, due to the specificity of the working content of the resistor and the independence of the working environment, aging acceleration simulation conforming to the actual situation cannot be realized for the resistor of the high-voltage switching-off equipment. Patent CN119044043a proposes a high-temperature high-concentration hydrogen chloride corrosion test device and test method, heating and raising temperature in a tube furnace, continuously introducing high-concentration hydrogen chloride gas through a gas cylinder, keeping the gas concentration in the tube furnace constant, adding a post-treatment device to reduce environmental pollution, and preventing personnel from poisoning. However, the inside of the tube furnace is limited by space and cavity heating modes, interference of factors such as resistance value detection and intermittent high-voltage discharge of the resistor sheet cannot be realized, and an aging mode of the resistor sheet in the actual use process cannot be accurately simulated. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides a gas corrosion aging experimental device and a method, which realize the electro-thermal-chemical trinity coupling aging simulation of a resistor in a special gas environment. In order to achieve the purpose, the invention is realized by adopting the following technical scheme: a gas corrosion aging experimental device comprises a sealing box, a reaction kettle and a bracket; The heat-insulating type electric resistance meter comprises a sealed box, wherein a heat management system, a heating system and a cooling system are arranged in the sealed box, a plurality of reaction kettles are arranged in the sealed box, the reaction kettles comprise reaction kettle cavities, sealing covers are connected to the tops of the reaction kettle cavities, air inlets are formed in the bottoms of the reaction kettle cavities, air outlets are formed in the tops of the reaction kettle cavities, and a support is arranged in the reaction kettle cavities and carries resistance sheets to be measured. Optionally, polytetrafluoroethylene coating is coated on the inner wall of the reaction kettle cavity and the inner surface of the sealing cover, and electrode extension holes are formed in the sealing cover and located at the edge of the sealing cover. Optionally, an air inlet connecting piece is arranged on the air inlet, at least six air inlet plugs are integrated in the air inlet connecting piece, an air outlet plug is arranged in the air outlet, and the cross section area of the air outlet channel is 0.8 to 1.4 times of the total cross section area of all channels in the air inlet area. Optionally, the support comprises a vertical structure and a horizontal structure, wherein the vertical structure comprises a main shaft, an auxiliary rod and a sliding collar, the electrode penetrates through the electrode extension hole to be connected with the top of the main shaft, and the horizontal structure is a tray. The sliding lantern ring is connected to the main shaft in a sliding mode, the tray is formed by annularly arranging a plurality of supporting plates, the inner ends of the supporting plates are hinged to the main shaft, one end of the auxiliary rod is hinged to the sliding lantern ring, the other end of the auxiliary rod is hinged to the corresponding supporting plate, and the tray is in a horizontal unfolding state and a vertical folding state on the main shaft. Optionally, a spring pin is arranged on the sliding collar, and a positioning groove is arranged at the position of the main shaft corresponding to the sliding collar. The number of the trays is multiple, the trays are in a group, the trays positioned below in each group are horizontally unfolded from bottom to top, the trays positioned above are horizontally unfolded from top to bottom, the heights of the gaps between the two trays in the