Device and method for measuring the effect of sulfur hexafluoride decomposition products on the resistance of carbon ceramic resistors

Abstract

This invention discloses a measuring device for the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramic resistors, mainly solving the problem of the lack of related devices for measuring the effect of sulfur hexafluoride gas decomposition products on the resistance value of carbon ceramic resistors under the influence of high-energy electric arcs. The measuring device includes a tank assembly, a carbon ceramic resistor mounting assembly, N first measuring terminals, and M second measuring terminals. M layers of carbon ceramic resistor sheets are placed on the ceramic resistor mounting assembly, with N sheets in each layer. The N carbon ceramic resistor sheets in each layer are arranged correspondingly in the vertical direction and connected to the N first measuring terminals. The N carbon ceramic resistor sheets in each layer are arranged side-by-side and connected to each other, and are also connected to the M second measuring terminals. This invention can separately measure the resistance changes of carbon ceramic resistor sheets with different resistance values ​​under the influence of sulfur hexafluoride decomposition products, with high measurement efficiency.

Description

Technical Field

[0001] This invention relates to a measuring device and method, specifically to a measuring device and method for measuring the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramic resistors. Background Technology

[0002] With the development of modern industry, carbon ceramic resistors, with their core advantages such as high pulse resistance, non-inductive properties, high temperature resistance, and high stability, have become the preferred resistors for high voltage / high power / strong pulse / extreme environment scenarios, and are irreplaceable in fields such as ultra-high voltage, new energy vehicles, industrial power supplies, medical, and military industries.

[0003] When carbon ceramic resistors are used in ultra-high voltage switching circuits, they are often operated in a sealed sulfur hexafluoride (SF6) gas environment to improve insulation levels, extinguish arcs, dissipate heat, and protect the resistor body. However, frequent switching under high current conditions can cause the SF6 gas to be subjected to the intense effects of high-energy electric arcs, leading to thermal decomposition, chemical recombination, and performance degradation of the SF6, which in turn adversely affects the resistance value of the carbon ceramic resistor.

[0004] However, there is currently no known device for measuring the effect of the decomposition products of sulfur hexafluoride gas on the resistance of carbon ceramic resistors after being subjected to a high-energy electric arc. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that there is currently no device for measuring the effect of sulfur hexafluoride decomposition products on the resistance of carbon ceramic resistors after being subjected to a high-energy electric arc, and to provide a device and method for measuring the effect of sulfur hexafluoride decomposition products on the resistance of carbon ceramic resistors.

[0006] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0007] A measuring device for the effect of sulfur hexafluoride decomposition products on the resistance of carbon ceramic resistors, characterized by:

[0008] It includes a tank assembly, a discharge gap assembly, a carbon ceramic resistor mounting assembly, N first measuring terminals and M second measuring terminals; wherein, N≥2 and M≥2;

[0009] The upper end of the tank assembly is provided with an external power supply terminal, and its inner end is placed inside the tank assembly.

[0010] The outer end of the external power supply inlet terminal is used for electrical connection with an external power supply.

[0011] The discharge gap assembly is located inside the upper part of the tank assembly and is electrically connected to the inner end of the external power supply terminal.

[0012] The tank assembly has a gas port on its side wall for connecting to an external vacuuming device or sulfur hexafluoride gas source, so as to fill the experimental environment with sulfur hexafluoride gas after vacuuming.

[0013] The carbon ceramic resistor mounting assembly is installed inside the lower end of the tank assembly, and has M layers of mounting space on it; the M layers of mounting space are respectively used to place N×M carbon ceramic resistor pieces to be measured, and the number of carbon ceramic resistor pieces to be measured in each layer of mounting space is N.

[0014] In each layer of the installation space, N carbon ceramic resistance sheets to be measured are arranged in the vertical direction, thus forming N groups of M carbon ceramic resistance sheets to be measured arranged in the vertical direction. The lower ends of the M carbon ceramic resistance sheets to be measured in each group are connected and then electrically connected to N first measurement terminals.

[0015] N carbon ceramic resistance sheets to be measured are arranged side by side in the same layer of the installation space to form M groups of N carbon ceramic resistance sheets to be measured arranged side by side in the same layer of the installation space. The upper ends of the M groups of N carbon ceramic resistance sheets to be measured arranged side by side in the same layer of the installation space are connected and then electrically connected to M second measurement terminals respectively.

[0016] The inner ends of the N first measuring terminals and the M second measuring terminals are respectively installed at the lower end of the tank assembly, and their outer ends are located outside the tank assembly; the N first measuring terminals and the M second measuring terminals are used to electrically connect to the positive and negative terminals of an external resistance measuring device during measurement.

[0017] Furthermore, the carbon ceramic resistor mounting assembly includes a resistor bracket, M insulating plates, and N insulating pull rods;

[0018] The lower end of the resistor support is installed inside the lower end of the tank assembly;

[0019] M insulating plates are arranged sequentially above the resistor support in a vertical direction, with a gap between adjacent insulating plates. The lower surface of the bottom insulating plate is mounted on the upper surface of the upper end of the resistor support.

[0020] The space between two adjacent insulating plates and above the top insulating plate is the mounting space for placing the carbon ceramic resistance sheet to be measured.

[0021] N insulating rods are respectively inserted vertically through the upper ends of N carbon ceramic resistors to be measured, M insulating plates, and resistor supports in each installation space;

[0022] The upper and lower ends of the N insulating rods are respectively equipped with elastic fixing components, which are used to press and fix the carbon ceramic resistance sheet to be measured.

[0023] Furthermore, it is also equipped with M parallel conductive components and N first connecting components;

[0024] M parallel conductive elements are used to connect the upper ends of N carbon ceramic resistance sheets to be measured in the M-layer mounting space, and are also electrically connected to M second measuring terminals through second connecting elements.

[0025] The N first connectors are used to connect the lower ends of the M carbon ceramic resistance sheets to be measured, which are arranged in the N groups along the vertical direction, and are also electrically connected to the N first measurement terminals.

[0026] Furthermore, the parallel conductive components are parallel conductive plates; the lower surfaces of M parallel conductive plates respectively abut against the upper surfaces of N carbon ceramic resistance sheets to be measured within the corresponding installation space; the elastic fixing component abuts against the upper surface of the uppermost parallel conductive plate; the upper surfaces of the remaining parallel conductive plates abut against the lower surface of the corresponding insulating plate.

[0027] The upper surfaces of the M insulating plates are respectively provided with N connecting conductors, and the N connecting conductors respectively abut against the lower surfaces of the N carbon ceramic resistor sheets to be measured in the corresponding installation space.

[0028] N of the first connectors are connected to the lower ends of M carbon ceramic resistance sheets to be measured, which are respectively arranged in the vertical direction, through N connecting conductors.

[0029] N insulating rods are respectively inserted vertically through the N carbon ceramic resistors to be measured and N connecting conductors, M insulating plates and M parallel conductive plates in each layer of the installation space, as well as the upper end of the resistor support.

[0030] Both the first connector and the second connector are connecting bars or connecting lines;

[0031] Alternatively, the parallel conductive components are parallel conductive lines; M of the parallel conductive lines are respectively connected to the upper surfaces of N carbon ceramic resistance sheets to be measured in the corresponding installation space;

[0032] The upper surfaces of the M insulating plates are respectively provided with N connecting conductors, and the N connecting conductors respectively abut against the lower surfaces of the N carbon ceramic resistor sheets to be measured in the corresponding installation space.

[0033] N of the first connectors are connected to the lower ends of M carbon ceramic resistance sheets to be measured, which are respectively arranged in the vertical direction, through N connecting conductors.

[0034] N insulating rods are respectively inserted vertically through the N carbon ceramic resistance sheets to be measured and N connecting conductors, M insulating plates and the upper end of the resistor support in each layer of the installation space.

[0035] Both the first connector and the second connector are connecting strips or connecting lines.

[0036] Furthermore, the elastic fixing component includes a crimping member, an elastic gasket, a guide sleeve, and a fixing pin;

[0037] The crimping member and the elastic gasket are sequentially sleeved on the upper end of the insulating tie rod in the vertical direction, and the guide sleeve is sleeved on the outer peripheral surface of the elastic gasket and the lower part of the outer peripheral surface of the crimping member.

[0038] The guide sleeve located at the upper end of the insulating rod abuts against the upper surface of the uppermost parallel conductive parts, and the guide sleeve located at the lower end of the insulating rod abuts against the lower surface of the upper end of the resistor support.

[0039] The fixing pin passes through the outer peripheral surface of the crimping member and the insulating tie rod to fix the crimping member and the insulating tie rod together.

[0040] Furthermore, the discharge gap assembly includes two discharge electrodes and two discharge supports;

[0041] The two discharge electrodes are respectively mounted on the upper part of the inside of the tank assembly via two discharge brackets;

[0042] The two discharge electrodes are arranged opposite each other, with a gap between them;

[0043] The external power supply input terminal includes an input terminal and an output terminal;

[0044] The inlet terminal and outlet terminal are respectively installed on the upper end of the tank assembly, and their inner ends are electrically connected to the two discharge brackets respectively.

[0045] Furthermore, the discharge electrode, discharge support, lead-in terminal, and lead-out terminal are all made of graphite, copper, brass, stainless steel, or titanium.

[0046] Both discharge electrodes are hemispherical structures, with their spherical surfaces facing each other.

[0047] Furthermore, a pressure gauge and a pressure-controlled solenoid valve are installed at the air inlet via an air filling pipe;

[0048] The pressure-controlled solenoid valve is used to automatically close when the pressure inside the tank assembly reaches a set pressure value.

[0049] Furthermore, the tank assembly includes a tank body, an upper insulating cover, a lower insulating cover, and a tank body support;

[0050] The upper and lower end faces of the tank are respectively provided with openings;

[0051] The upper and lower insulating covers are respectively installed at the upper and lower openings of the tank body, and a sealing structure is provided at the installation points;

[0052] The external power supply input terminal is located on the end face of the upper insulating cover, and the discharge gap assembly is located on the inner end face of the upper insulating cover.

[0053] The air inlet is located on the side wall of the tank;

[0054] The lower end of the carbon ceramic resistor mounting assembly is mounted on the inner end face of the lower insulating cover.

[0055] N first measuring terminals and M second measuring terminals are respectively installed on the lower end face of the lower insulating cover;

[0056] The tank support is installed on the outer end face of the lower insulating cover.

[0057] Meanwhile, the present invention also provides a method for measuring the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramics. Based on the aforementioned measuring device for the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramics, its special feature is that it includes the following steps:

[0058] Step 1: Install the N×M carbon ceramic resistors to be measured onto the carbon ceramic resistor mounting assembly;

[0059] Step 2: Connect an external vacuum device through the air port to evacuate the tank assembly to a vacuum state; then connect an external sulfur hexafluoride gas source through the air port to fill the tank assembly with sulfur hexafluoride gas at the pressure required for the experimental environment.

[0060] Step 3: Connect an external power supply via the external power supply terminal;

[0061] Step 4: Turn on the power supply and discharge through the discharge gap assembly to decompose the sulfur hexafluoride gas. Turn off the power supply after the set discharge cycle is reached.

[0062] Step 5: After a preset set time, connect the positive and negative terminals of an external resistance measuring device to the corresponding first and second measuring terminals respectively, and measure the resistance values ​​of N×M carbon ceramic resistors in sequence using the resistance measuring device.

[0063] Step 6: Repeat steps 4 and 5 until the set measurement task is completed.

[0064] Compared with the prior art, the present invention has the following beneficial technical effects:

[0065] This invention constructs N groups of M carbon ceramic resistors to be measured, each arranged vertically in a corresponding manner within the mounting space of each layer. The lower ends of these M vertically aligned resistors are connected and electrically connected to N first measuring terminals. Simultaneously, N carbon ceramic resistors to be measured are arranged side-by-side within the same mounting space, forming M groups of N parallel carbon ceramic resistors. The upper ends of these M groups are connected and electrically connected to M second measuring terminals. During the electrolysis of sulfur hexafluoride gas within the tank assembly, the influence of sulfur hexafluoride decomposition products on the resistance values ​​of carbon ceramic resistors with different resistance values ​​can be measured under long-term and identical measurement conditions. This enables fundamental research on the actual operating conditions of carbon ceramic resistors, filling a gap in the domestic market for such devices. Attached Figure Description

[0066] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0067] Figure 2 This is a schematic diagram of the tank assembly in an embodiment of the present invention, wherein (a) is the front view, (b) is the left view, and (c) is the FF sectional view of (a);

[0068] Figure 3 This is a schematic diagram of the structure of the discharge gap assembly in an embodiment of the present invention, wherein (a) is a front view, (b) is a top view, and (c) is an isometric view;

[0069] Figure 4 This is a schematic diagram of the structure of the carbon ceramic resistor assembly in an embodiment of the present invention, wherein (a) is the front view, (b) is the EE sectional view of (a), (c) is the first-view axonometric view, and (d) is the second-view axonometric view.

[0070] Figure 5 This is a schematic diagram showing the connection between the resistor and the first and second measuring terminals in an embodiment of the present invention;

[0071] Figure 6 This is a cross-sectional view of the elastic fixing component in an embodiment of the present invention.

[0072] The annotations in the attached figures are explained as follows:

[0073] 01-Carbon ceramic resistor sheet;

[0074] 1-Tank assembly, 11-Tank, 12-Upper insulating cover, 13-Lower insulating cover, 14-Tank support;

[0075] 2-Discharge gap assembly, 21-Discharge electrode, 22-Discharge support;

[0076] 3-Carbon ceramic resistor mounting assembly, 31-Resistor bracket, 32-Insulating plate, 33-Insulating pull rod, 34-First connector, 35-Parallel conductive parts, 36-Second connector, 37-Connecting conductor;

[0077] 4-First measuring terminal, 5-Second measuring terminal, 6-External power supply terminal, 7-Air port;

[0078] 8-Elastic fixing component, 81-Crimping component, 82-Elastic gasket, 83-Guide sleeve, 84-Fixing pin;

[0079] 9-Pressure gauge. Detailed Implementation

[0080] To make the objectives, advantages, and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0081] See Figures 1-6 This embodiment provides a measuring device for the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramic resistors, including a tank assembly 1, a discharge gap assembly 2, a carbon ceramic resistor mounting assembly 3, N first measuring terminals 4 and M second measuring terminals 5.

[0082] See Figure 2 Specifically, the aforementioned tank assembly 1 includes a tank 11, an upper insulating cover 12, a lower insulating cover 13, and a tank support 14.

[0083] The tank body 11 has a cylindrical structure with openings on its upper and lower end faces. The upper insulating cover 12 and the lower insulating cover 13 are both circular cover plates adapted to fit the openings. They are respectively installed at the upper and lower openings of the tank body 11, and a sealing structure is provided at the installation points to ensure the sealing performance of the tank body 11. This sealing structure can be a sealing ring structure or other sealing structures, as long as it meets the sealing requirements.

[0084] The upper end of the tank support 14 is installed on the outer end face of the lower insulating cover 13, and the lower end is placed on the test platform. The test platform can be a desktop, the ground, the instrument surface, etc., depending on the test environment.

[0085] See Figure 1 An external power supply terminal 6 is provided on the end face of the upper insulating cover 12, and its inner end is placed inside the tank body 11.

[0086] In this embodiment, the external power supply terminal 6 includes an input terminal and an output terminal; the input terminal and the output terminal are made of graphite, copper, brass, stainless steel, or titanium. In this embodiment, graphite is preferred for both. The graphite input terminal and the graphite output terminal are respectively installed on the upper end of the tank assembly 1, and a sealing structure is provided at the installation location to ensure the sealing performance of the inside of the tank assembly 1. The inner ends of the graphite input terminal and the graphite output terminal are respectively placed inside the tank 11, and the outer ends are used for electrical connection with the external power supply to introduce the power required for measurement.

[0087] See Figure 3 The discharge gap assembly 2 includes two discharge electrodes 21 and two discharge supports 22. The materials of the discharge electrodes 21 and the discharge supports 22 are graphite, copper, brass, stainless steel or titanium. In this embodiment, the materials of the discharge electrodes 21 and the discharge supports 22 are preferably graphite.

[0088] Both graphite electrodes are hemispherical structures, with their spherical surfaces facing each other and having a gap. The two graphite electrodes are respectively mounted on the inner end face of the upper insulating cover 12 via two graphite supports, and the two graphite supports are electrically connected to the inner ends of the graphite inlet terminal and the graphite outlet terminal, respectively.

[0089] A gas port 7 is provided on the side wall of the tank 11. This gas port 7 is used to connect to external vacuum equipment and sulfur hexafluoride gas source to achieve the filling of sulfur hexafluoride gas required for the experimental environment after vacuuming. At the same time, a pressure gauge 9 and a pressure-controlled solenoid valve (not shown in the figure) are installed at the gas port 7 through a gas filling pipe. The pressure gauge 9 can detect and display the gas pressure inside the tank 11, and the pressure-controlled solenoid valve can automatically close the gas port 7 when the pressure inside the tank 11 reaches the set pressure value.

[0090] See Figure 4 and Figure 5 The carbon ceramic resistor assembly 3 includes a resistor support 31, M insulating plates 32, and N insulating pull rods 33; M≥2, N≥2. In this embodiment, N=M=4 is used as an example for illustration.

[0091] The resistance value of each carbon ceramic resistor 01 can be specifically designed according to actual measurement needs to meet the required resistance measurement requirements.

[0092] The lower end of the resistor support 31 is mounted on the inner end face of the lower insulating cover 13. Four insulating plates 32 are arranged sequentially above the resistor support 31 in the vertical direction, with a gap between adjacent insulating plates 32. The lower surface of the lower insulating plate 32 is mounted on the upper surface of the upper end of the resistor support 31. The gap between adjacent insulating plates 32 and the space above the uppermost insulating plate 32 form an installation space for placing the carbon ceramic resistance sheet 01 to be measured. Each installation space contains four carbon ceramic resistance sheets 01 to be measured, which are evenly distributed along the circumference and are arranged correspondingly in the vertical direction.

[0093] Four carbon ceramic resistance elements to be measured, placed in the same installation space, are arranged side by side and connected to each other through parallel conductive elements 35. The four parallel conductive elements 35 are electrically connected to four second measuring terminals 6 through second connectors 36.

[0094] Four conductive bodies 37 are respectively provided on the upper surface of the four insulating plates 32, and the four conductive bodies 37 abut against the lower surface of the corresponding carbon ceramic resistance sheet 01 to be measured; four first connectors 34 are also provided, which are used to connect the four carbon ceramic resistance sheets 01 to be measured in the vertical direction through the four conductive bodies 37, and the four first connectors 34 are electrically connected to the four first measuring terminals 4 respectively.

[0095] In this embodiment, the parallel conductive elements 35 are parallel conductive plates; the upper surfaces of the remaining parallel conductive plates, except for the topmost layer, abut against the lower surface of the corresponding insulating plate 32.

[0096] Of course, in other embodiments, the aforementioned parallel conductive elements 35 can also be parallel conductive lines, as long as they can achieve electrical connection.

[0097] The aforementioned second connector 36 is a connector bar or connector wire; the first connector 3 is also a connector bar or connector wire. In this embodiment, the first connector 34 and the second connector 36 are both connector bars for illustrative purposes.

[0098] N insulating rods 33 extend vertically through each of the four carbon ceramic resistance sheets 01 to be measured, four connecting conductors, four insulating plates 32, and four parallel conductive plates in each layer. Elastic fixing components 8 are installed at the upper and lower ends of the four insulating rods 33, respectively, and these components abut against the upper surface of the topmost parallel conductive plate and the lower surface of the upper end of the resistor support 31.

[0099] See Figure 1 and Figure 6 Specifically, the elastic fixing component 8 includes a crimping member 81, an elastic gasket 82, a guide sleeve 83, and a fixing pin 84.

[0100] The crimping member 81 and the elastic gasket 82 are sequentially sleeved on the upper end of the insulating pull rod 33 in the vertical direction. The guide sleeve 83 is sleeved on the outer peripheral surface of the elastic gasket 82 and the lower part of the outer peripheral surface of the crimping member 81. The guide sleeve 83 located at the upper end of the insulating pull rod 33 abuts against the upper surface of the uppermost parallel conductive plate, and the guide sleeve 83 located at the lower end of the insulating pull rod 33 abuts against the lower surface of the upper end of the resistor support 31. The fixing pin 84 passes through the upper part of the outer peripheral surface of the crimping member 81 and the insulating pull rod 33 to fix the crimping member 81 and the insulating pull rod 33 together.

[0101] Four first measuring terminals 4 and four second measuring terminals 5 are respectively mounted on the lower insulating cover 13, and the four first measuring terminals 4 and four second measuring terminals 5 are evenly distributed circumferentially along the same virtual circle, with their outer ends outside the lower insulating cover 13. Any one of the first measuring terminals 4 and any one of the second measuring terminals 5 is used for electrical connection with the positive and negative terminals of an external resistance measuring device, respectively.

[0102] When using it, please follow these steps:

[0103] Step 1: Install the 4×4 carbon ceramic resistor pieces 01 to be measured onto the carbon ceramic resistor mounting assembly 3;

[0104] Step 2: Connect an external vacuum device through air port 7 to evacuate the tank assembly 1 to a vacuum state; then connect an external sulfur hexafluoride gas source through air port 7 to fill the tank assembly 1 with the sulfur hexafluoride gas required for the experimental environment. During this process, when the gas pressure inside the tank assembly reaches the set value, the pressure-controlled solenoid valve will automatically close air port 7.

[0105] Step 3: Connect an external power supply to terminal 6 via an external power supply.

[0106] Step 4: Turn on the power supply and discharge through the two discharge electrodes 21 to decompose the sulfur hexafluoride gas. Turn off the power supply after the set discharge cycle is reached.

[0107] Step 5: After a preset settling time, connect the corresponding first measuring terminal 4 and second measuring terminal 5 to the positive and negative terminals of an external resistance measuring device, respectively. Measure the resistance values ​​of N×M carbon ceramic resistors 01 sequentially using the resistance measuring device. For example, when measuring the resistance value of the topmost leftmost carbon ceramic resistor 01, connect the first measuring terminal 4 and second measuring terminal 5 corresponding to that carbon ceramic resistor 01 to the positive and negative terminals of the external resistance measuring device, respectively. To improve measurement accuracy, an LCR bridge can be used to measure the resistance value of that carbon ceramic resistor 01. Similarly, the resistance values ​​of the remaining carbon ceramic resistors 01 can be measured using the same method.

[0108] Step 6: Repeat steps 4 and 5 until the set measurement task is completed.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

Claims

1. A measuring device for the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramic resistors, characterized in that: It includes a tank assembly (1), a discharge gap assembly (2), a carbon ceramic resistor mounting assembly (3), N first measuring terminals (4) and M second measuring terminals (5); wherein, N≥2 and M≥2; The upper end of the tank assembly (1) is provided with an external power supply terminal (6), and its inner end is placed inside the tank assembly (1). The outer end of the external power supply input terminal (6) is used for electrical connection with an external power supply. The discharge gap assembly (2) is located inside the upper part of the tank assembly (1) and is electrically connected to the inner end of the external power supply terminal (6); The tank assembly (1) is provided with a gas port (7) on its side wall for connecting to an external vacuuming device or sulfur hexafluoride gas source, so as to fill the experimental environment with sulfur hexafluoride gas after vacuuming. The carbon ceramic resistor mounting assembly (3) is installed inside the lower end of the tank assembly (1), and has M layers of mounting space. The M layers of mounting space are used to place N×M carbon ceramic resistor pieces (01) to be measured, and the number of carbon ceramic resistor pieces (01) to be measured in each layer of mounting space is N. N carbon ceramic resistors (01) to be measured in each layer of the installation space are arranged in the vertical direction, thus forming N groups of M carbon ceramic resistors (01) to be measured arranged in the vertical direction. The lower ends of each group of M carbon ceramic resistors (01) to be measured are connected to N first measurement terminals (4). N carbon ceramic resistance sheets (01) to be measured are arranged side by side in the same layer of the installation space, thereby forming M groups of N carbon ceramic resistance sheets (01) to be measured arranged side by side in the same layer of the installation space. The upper ends of the M groups of N carbon ceramic resistance sheets (01) to be measured are connected to M second measurement terminals (5) respectively. The inner ends of N first measuring terminals (4) and M second measuring terminals (5) are respectively installed at the lower end of the tank assembly (1), and their outer ends are placed outside the tank assembly (1); the N first measuring terminals (4) and M second measuring terminals (5) are respectively used to electrically connect to the positive and negative terminals of an external resistance measuring device during measurement.

2. The measuring device for the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramics according to claim 1, characterized in that: The carbon ceramic resistor mounting assembly (3) includes a resistor bracket (31), M insulating plates (32) and N insulating rods (33); The lower end of the resistor support (31) is installed inside the lower end of the tank assembly (1); M insulating plates (32) are arranged sequentially above the resistor support (31) in the vertical direction, and there is a gap between two adjacent insulating plates (32). The lower surface of the lowermost insulating plate (32) is installed on the upper surface of the upper end of the resistor support (31). The space between two adjacent insulating plates (32) and above the uppermost insulating plate (32) is the mounting space for placing the carbon ceramic resistance sheet (01) to be measured; N insulating rods (33) are respectively inserted vertically through the upper ends of N carbon ceramic resistor sheets (01) to be measured, M insulating plates (32) and resistor brackets (31) in each installation space; The upper and lower ends of the N insulating pull rods (33) are respectively equipped with elastic fixing components (8), which are used to press and fix the carbon ceramic resistance sheet (01) to be measured.

3. The measuring device for the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramics according to claim 2, characterized in that: It is also equipped with M parallel conductive parts (35) and N first connecting parts (34); The M parallel conductive elements (35) are used to connect the upper ends of the N carbon ceramic resistance sheets (01) to be measured in the M-layer mounting space, and are electrically connected to the M second measuring terminals (5) through the second connector (36). The N first connectors (34) are used to connect the lower ends of the M carbon ceramic resistance sheets (01) to be measured, which are arranged in the vertical direction, and are also electrically connected to the N first measurement terminals (4).

4. The measuring device for the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramics according to claim 3, characterized in that: The parallel conductive components (35) are parallel conductive plates; the lower surfaces of the M parallel conductive plates respectively abut against the upper surfaces of the N carbon ceramic resistance sheets (01) to be measured in the corresponding installation space; the elastic fixing component (8) abuts against the upper surface of the uppermost parallel conductive plate; the upper surfaces of the remaining parallel conductive plates abut against the lower surface of the corresponding insulating plate (32); The upper surfaces of the M insulating plates (32) are respectively provided with N connecting conductors (37), and the N connecting conductors (37) respectively abut against the lower surfaces of the N carbon ceramic resistor sheets (01) to be measured in the corresponding installation space; N first connectors (34) are connected to the lower ends of M carbon ceramic resistor sheets (01) to be measured, which are respectively arranged in the up-down direction, through N connecting conductors (37); N insulating rods (33) pass through the upper ends of N carbon ceramic resistor sheets (01) to be measured and N connecting conductors (37), M insulating plates (32) and M parallel conductive plates and resistor brackets (31) in the installation space of each layer in the vertical direction. Both the first connector (34) and the second connector (36) are connecting bars or connecting lines; Alternatively, the parallel conductive elements (35) are parallel conductive lines; M of the parallel conductive lines are respectively connected to the upper surfaces of N carbon ceramic resistors (01) to be measured in the corresponding installation space; The upper surfaces of the M insulating plates (32) are respectively provided with N connecting conductors (37), and the N connecting conductors (37) respectively abut against the lower surfaces of the N carbon ceramic resistor sheets (01) to be measured in the corresponding installation space; N first connectors (34) are connected to the lower ends of M carbon ceramic resistor sheets (01) to be measured, which are respectively arranged in the up-down direction, through N connecting conductors (37); N insulating rods (33) pass through the upper ends of the N carbon ceramic resistance sheets (01) to be measured, N connecting conductors (37), M insulating plates (32), and resistor brackets (31) respectively in the vertical direction in each layer of the installation space. Both the first connector (34) and the second connector (36) are connecting strips or connecting lines.

5. The measuring device for the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramics according to claim 3 or 4, characterized in that: The elastic fixing component (8) includes a crimping member (81), an elastic gasket (82), a guide sleeve (83), and a fixing pin (84); The crimping member (81) and the elastic gasket (82) are sequentially sleeved on the upper end of the insulating pull rod (33) in the vertical direction, and the guide sleeve (83) is sleeved on the outer peripheral surface of the elastic gasket (82) and the lower part of the outer peripheral surface of the crimping member (81). The guide sleeve (83) located at the upper end of the insulating pull rod (33) abuts against the upper surface of the uppermost parallel conductive element (35), and the guide sleeve (83) located at the lower end of the insulating pull rod (33) abuts against the lower surface of the upper end of the resistor support (31). The fixing pin (84) passes through the outer peripheral surface of the crimping member (81) and the insulating tie rod (33) to fix the crimping member (81) and the insulating tie rod (33) together.

6. The measuring device for the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramics according to claim 1, characterized in that: The discharge gap assembly (2) includes two discharge electrodes (21) and two discharge supports (22); The two discharge electrodes (21) are respectively mounted on the upper part of the inside of the tank assembly (1) via two discharge brackets (22); The two discharge electrodes (21) are arranged opposite each other, with a gap between them; The external power supply input terminal (6) includes an input terminal and an output terminal; The inlet terminal and outlet terminal are respectively installed on the upper end of the tank assembly (1), and their inner ends are electrically connected to the two discharge brackets (22).

7. The measuring device for the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramics according to claim 6, characterized in that: The materials of the discharge electrode (21), discharge bracket (22), lead-in terminal and lead-out terminal are all graphite, copper, brass, stainless steel or titanium. Both discharge electrodes (21) are hemispherical structures, with their spherical surfaces facing each other.

8. The measuring device for the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramics according to claim 1, characterized in that: A pressure gauge (9) and a pressure-controlled solenoid valve are installed at the air inlet (7) via an air filling pipe; The pressure-controlled solenoid valve is used to automatically close when the pressure inside the tank assembly (1) reaches a set pressure value.

9. The measuring device for the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramics according to claim 1, characterized in that: The tank assembly (1) includes a tank (11), an upper insulating cover (12), a lower insulating cover (13), and a tank support (14); The upper and lower end faces of the tank (11) are respectively provided with openings; The upper insulating cover (12) and the lower insulating cover (13) are respectively installed at the upper and lower openings of the tank body (11), and a sealing structure is provided at the installation location; The external power supply input terminal (6) is disposed on the end face of the upper insulating cover (12), and the discharge gap assembly (2) is disposed on the inner end face of the upper insulating cover (12); The air inlet (7) is located on the side wall of the tank body (11); The lower end of the carbon ceramic resistor mounting assembly (3) is mounted on the inner end face of the lower insulating cover (13); N first measuring terminals (4) and M second measuring terminals (5) are respectively installed on the lower end face of the lower insulating cover (13); The tank support (14) is installed on the outer end face of the lower insulating cover (13).

10. A method for measuring the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramics, based on the measuring device for the effect of sulfur hexafluoride decomposition products on the resistance value of carbon ceramics as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Install the N×M carbon ceramic resistor pieces (01) to be measured onto the carbon ceramic resistor mounting assembly (3); Step 2: Connect an external vacuum device through the air port (7) to evacuate the tank assembly (1) to a vacuum state; then connect an external sulfur hexafluoride gas source through the air port (7) to fill the tank assembly (1) with sulfur hexafluoride gas at the pressure required for the experimental environment. Step 3: Connect an external power supply to the external power supply terminal (6); Step 4: Start the power supply and discharge through the discharge gap assembly (2) to decompose the sulfur hexafluoride gas. When the set discharge cycle is reached, turn off the power supply. Step 5: After a preset time of rest, connect the positive and negative terminals of the external resistance measuring device through the corresponding first measuring terminal (4) and second measuring terminal (5) respectively, and measure the resistance data of N×M carbon ceramic resistors (01) in sequence through the resistance measuring device. Step 6: Repeat steps 4 and 5 until the set measurement task is completed.

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