Research test system applied to circuit breaker environment-friendly gas

Abstract

The invention relates to a research test system applied to environment-friendly gas of a circuit breaker, which comprises a circuit breaker main body, the circuit breaker main body comprises a shell and an internal element arranged in the shell, an insulation cavity for mounting the internal element is arranged in the shell, one side of the shell is connected with a crank arm box, and the crank arm box is connected with the circuit breaker main body. The other side of the shell is connected with a test shell, and a temperature sensing device is also arranged in the insulating cavity of the shell; the test shell is internally provided with a test cavity communicated with the insulation cavity of the shell, a heating device is installed in the test cavity, and a temperature monitoring device is further arranged on the side, away from the shell, of the test shell. And metal pieces, insulating pieces and grease used in the circuit breaker can be quickly, efficiently and comprehensively researched, so that the reliability of product operation is improved.

Description

Technical Field

[0001] This invention relates to the field of circuit breakers, and in particular to a research and testing system for environmentally friendly gases used in circuit breakers. Background Technology

[0002] A reliable power supply is the cornerstone of modern society. In power transmission and distribution systems, substations are key nodes for controlling and protecting the power grid. For decades, SF6 has been the dominant technology in high-voltage equipment. SF6 possesses unparalleled insulation and arc-extinguishing properties; however, its high global warming potential (GWP) is a significant drawback. Even with state-of-the-art sealing systems and mature gas handling procedures, SF6 emissions remain a major source of the carbon footprint of high-voltage equipment. The concentration of SF6 in the Earth's atmosphere continues to rise annually, and global SF6 emissions account for a few thousandths of all carbon dioxide equivalent emissions.

[0003] Therefore, the need to research SF6 alternative technologies to significantly reduce the carbon footprint of products while retaining the reliability, scalability, and compactness of SF6 technology is becoming increasingly urgent. As research and exploration continue, C4-FN gas is gradually gaining acceptance. As one of the alternative gases to SF6, C4-FN's main advantages include: environmental friendliness: a GWP of only 350–700, a gas density of 30%–60% of SF6, and a 99% reduction in CO2 equivalent; high dielectric strength: equipment size is comparable to SF6 solutions, avoiding excessive material usage; and excellent arc-extinguishing performance: compatible with mature arc-extinguishing technologies.

[0004] Because different media of gas have varying degrees of impact on the internal metal parts, insulating parts, and greases of circuit breakers, it is necessary to study and analyze the effects of different media of gas on them. However, currently, traditional laboratories, due to limitations such as laboratory conditions, can only conduct single, independent studies. They cannot simultaneously verify metal parts, non-metal parts, and greases, nor can they simulate real circuit breaker operating conditions. The research is too singular and one-sided. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a research and testing system for environmentally friendly gases used in circuit breakers, which can quickly and efficiently conduct comprehensive research on the metal parts, insulating parts and greases used inside circuit breakers.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is: a research and testing system for environmentally friendly gases applied to circuit breakers, the innovation of which lies in: including A circuit breaker body, the circuit breaker body including a housing and internal components built into the housing, an insulating cavity for installing the internal components inside the housing, a crank arm box connected to one side of the housing and a test housing connected to the other side, and a temperature sensing device installed in the insulating cavity of the housing. The test housing has a test cavity that is connected to an insulating cavity of the outer shell. A heating device is installed in the test cavity, and a temperature monitoring device is also installed on the side of the test housing away from the outer shell.

[0007] Furthermore, the test housing is fixed to the outer shell by means of a flange.

[0008] Furthermore, the connection between the temperature monitoring device and the test housing is as follows: an opening is made on the side of the test housing away from the outside, and a sealing plate is connected to the opening to seal it. The sealing plate is fixed to the test housing by bolts, and the temperature monitoring device is directly installed on the sealing plate.

[0009] Furthermore, the temperature sensing device is a temperature detector, the temperature monitoring device is a temperature monitor, and the heating device is an electric heating rod.

[0010] Furthermore, the experimental methods for studying the experimental system include the following steps: S1: First, before the circuit breaker is assembled, take pictures of each component of the circuit breaker and record the appearance of the target parts. S2: Then assemble the circuit breaker. After installing the moving contact module and stationary contact module of the circuit breaker, before installing the bushing of the circuit breaker, use a ohmmeter to measure the resistance value of other areas except the main circuit of the circuit breaker. Mark the measurement points with a marker during the measurement process so that the measurement points after the test are in the same position as those before the test. S3: The heating device starts working to heat the inner cavity of the circuit breaker body, simulating the state of the circuit breaker when it is working, and confirms the temperature of each internal component in the inner cavity of the circuit breaker body through the temperature monitoring device. S4: After the heating device reaches the pre-set detection time, use a resistance meter again to check the internal resistance change and the differences in the component samples to complete the test.

[0011] The advantages of this invention are: the research and testing system of this invention can quickly and efficiently conduct comprehensive research on the metal parts, insulating parts and greases used inside the circuit breaker, thereby improving the reliability of product operation.

[0012] Based on the above-mentioned research and testing system, the advantage of the test method of the present invention compared with the original method is that by simulating the overall operating environment of the circuit breaker, it is possible to comprehensively and systematically study different gases and temperatures inside the circuit breaker, as well as the metal parts, non-metal parts, and grease inside the circuit breaker. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the research and testing system for environmentally friendly gases applied to circuit breakers according to the present invention. Detailed Implementation

[0014] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0015] like Figure 1 The system shown is a research and testing system for environmentally friendly gases used in circuit breakers, including... A circuit breaker body includes a housing 1 and internal components built into the housing 1. The housing 1 has an insulating cavity for installing the internal components. A crank arm box 12 is connected to one side of the housing 1, and a test housing 2 is connected to the other side of the housing 1. A temperature sensing device is also installed in the insulating cavity of the housing 1.

[0016] A moving contact module, a stationary contact module, and an insulating pull rod are installed in the insulating cavity of the outer casing 1. The insulating pull rod is connected to the crank arm box 12 and, driven by the crank arm box 12, moves the moving contact module closer to or away from the stationary contact module. A sleeve is also provided on the outside of the outer casing 1, and an umbrella skirt structure is provided on the outer wall of the sleeve.

[0017] The test housing 2 has a test cavity that is connected to the insulating cavity of the outer shell 1. A heating device is installed in the test cavity. A temperature monitoring device 23 is also provided on the side of the test housing 2 away from the outer shell 1.

[0018] The test housing 2 is fixed to the outer shell 1 by means of a flange. The flange connection between the test housing 2 and the outer shell 1 facilitates the installation of the test housing 2 and makes it easy to remove the test housing 2 from the outer shell 1 after the test is completed.

[0019] The connection between the temperature monitoring device 23 and the test housing 2 is as follows: an opening is made on the side of the test housing 2 away from the outside, and a sealing plate 22 is connected to this opening to seal it. The sealing plate 22 is fixed to the test housing 2 by bolts, and the temperature monitoring device 23 is directly mounted on the sealing plate 22. The connection between the temperature monitoring device 23 and the test housing 2 is achieved by the sealing plate 22, which allows for easy disassembly and replacement of the temperature monitoring device 23 without having to disassemble the entire test housing 2, which is very convenient.

[0020] In this embodiment, the temperature sensing device is a temperature detector, the temperature monitoring device 23 is a temperature monitor, and the heating device 21 is an electric heating rod.

[0021] The experimental methods of the above-mentioned research and experimental system include the following steps: S1: First, before the circuit breaker is assembled, take pictures of each component of the circuit breaker and record the appearance of the target parts.

[0022] S2: Then assemble the circuit breaker. After installing the moving contact module and stationary contact module of the circuit breaker, before installing the bushing of the circuit breaker, use a ohmmeter to measure the resistance value of other areas except the main circuit of the circuit breaker. During the measurement, mark the measurement points with a marker to make it easy to measure the same points as before the test.

[0023] S3: The heating device starts working, heating the inner cavity of the circuit breaker body to simulate the state when the circuit breaker is working, and confirming the temperature of each internal component in the inner cavity of the circuit breaker body through the temperature monitoring device.

[0024] S4: After the heating device reaches the pre-set detection time, use a resistance meter again to check the internal resistance change and the differences in the component samples to complete the test.

[0025] The research and testing system of this invention can quickly and efficiently conduct comprehensive research on the metal parts, insulating parts, and greases used inside circuit breakers, thereby improving the reliability of product operation.

[0026] Based on the above-mentioned research and testing system, the advantage of the test method of the present invention compared with the original method is that by simulating the overall operating environment of the circuit breaker, it is possible to comprehensively and systematically study different gases and temperatures inside the circuit breaker, as well as the metal parts, non-metal parts, and grease inside the circuit breaker.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A research and test system for environmental friendly gases applied to circuit breakers, characterized in that it comprises: The circuit breaker body comprises a shell and internal elements built in the shell, and has an insulating cavity in which the internal elements are installed, one side of the shell is connected with a crank box, the other side is connected with a test shell, and a temperature sensing device is installed in the insulating cavity of the shell. The test shell has a test cavity connected with the insulating cavity of the shell, a heating device is installed in the test cavity, and a temperature monitoring device is arranged on the side of the test shell away from the shell. The test shell is fixed with the shell through the cooperation of flanges.

2. The system for research and test of environmentally friendly gases for circuit breakers according to claim 1, characterized in that it comprises: The connection between the temperature monitoring device and the test shell is that an opening is further formed on the side of the test shell away from the shell, a sealing plate is connected to the opening to seal the opening, the sealing plate is fixed with the test shell through the cooperation of bolts, and the temperature monitoring device is directly installed on the sealing plate.

3. The system for research and test of environmentally friendly gases for circuit breakers according to claim 1, characterized in that it comprises: The temperature sensing device uses a temperature sensing detector, the temperature monitoring device uses a temperature monitoring instrument, and the heating device uses an electric heating rod.

4. The system for research and test of environmentally friendly gases for circuit breakers according to claim 1, characterized in that it comprises: The test method of the research test system comprises the following steps:

5. The system for research and test of environmentally friendly gases for circuit breakers according to claim 1, characterized in that it comprises: S1: first, before the test, when the circuit breaker is not assembled, the parts of the circuit breaker are photographed, and the appearance of the target part is recorded; S2: then, the circuit breaker is assembled, and after the moving contact module and the static contact module of the circuit breaker are installed, the resistance values of other areas except the main circuit of the circuit breaker are measured by using a resistance meter before the bushing of the circuit breaker is installed, and marks are made on the measurement points by using a marker pen during the measurement process, so that the points are in the same position after the test and before the test; S3: the heating device starts to work, the inner cavity of the circuit breaker body is heated, the state of the circuit breaker during work is simulated, and the temperature of each internal element in the inner cavity of the circuit breaker body is confirmed by the temperature monitoring device; S4: after the heating device reaches the preset detection time, the resistance change of the internal resistance and the difference change of each part sample are checked again by using the resistance meter, and the test is completed. ​

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