A device for testing the motion characteristics of a particle

Abstract

This invention relates to a particle motion characteristic testing device. The device includes a mounting cylinder for connection to a high-voltage bushing to apply an equivalent voltage (equivalent to the voltage inside the GIS equipment cylinder) to the testing device. A scaled-down cylinder assembly, proportionally reduced to the GIS equipment cylinder, is mounted inside the mounting cylinder. The scaled-down cylinder assembly includes a scaled-down cylinder, a scaled-down conductive rod for connection to a high-voltage conductor, and a space between the conductive rod and the cylinder wall for placing particles. A scaled-down insulator is also located inside the scaled-down cylinder, and a mounting base is positioned between the insulator and the cylinder for mounting a particle trap. An observation port is provided on the scaled-down cylinder, and an observation window corresponding to the observation port is provided on the mounting cylinder. This invention effectively solves the problem of increased costs associated with using GIS equipment as a particle motion characteristic testing device in the prior art, and allows for proactive research to determine the optimal particle trapping design for new products.

Description

Technical Field

[0001] This invention belongs to the technical field of metal particle motion characteristic testing devices, specifically relating to a particle motion characteristic testing device that can reduce testing costs. Background Technology

[0002] GIS equipment has been widely used worldwide since the 1960s and 70s, especially in ultra-high voltage power transmission and large-scale offshore wind power transmission, where it holds immense promise. During transportation, assembly, and operation, GIS equipment inevitably generates metal particles. Common metal particles include linear, spherical, flake-like, and metallic dust, and even particles of the same form can vary in size. Statistics show that most internal failures of GIS equipment are caused by metal particles. During operation, these particles adhere not only to the convex but also the concave sides of insulators, causing flashover on both surfaces and resulting in penetrating burns. This reduces the insulation level of the GIS equipment and significantly lowers its reliability. Therefore, studying the motion characteristics of metal particles is crucial.

[0003] To address the aforementioned issues, Chinese utility model patent CN208314119U, with an authorization announcement date of January 1, 2019, discloses an experimental device for studying the motion characteristics of metal particles. While this device facilitates the study of metal particle motion characteristics, it cannot accurately reflect the motion characteristics, discharge, and adsorption of metal particles within GIS equipment. Therefore, existing technologies typically conduct metal particle motion characteristic tests within GIS equipment, using the GIS equipment as the testing device. During testing, a high-voltage bushing provides power, and a particle trap is installed within the GIS equipment to test the capture effect on metal particles.

[0004] However, using GIS equipment directly as a testing device for particle motion characteristics requires more components, making the testing device complex and increasing manufacturing costs. In addition, due to the large internal space of GIS equipment, more metal particles are needed to ensure the normal conduct of particle motion characteristic testing, further increasing testing costs. Summary of the Invention

[0005] The purpose of this invention is to provide a particle motion characteristic testing device to solve the problem that the use of GIS equipment as a particle motion characteristic testing device in the prior art leads to increased testing costs and increased manufacturing costs of the testing device.

[0006] To achieve the above objectives, the particle motion characteristic testing device of the present invention adopts the following technical solution:

[0007] A particle motion characteristic testing device includes a mounting cylinder for direct or indirect connection to a high-voltage bushing to apply an equivalent voltage to the device, which is equivalent to the voltage inside the GIS equipment cylinder. A scaled-down cylinder assembly, proportionally reduced to the GIS equipment cylinder, is fixedly mounted inside the mounting cylinder. The scaled-down cylinder assembly includes a scaled-down cylinder coaxially arranged with the mounting cylinder, and a scaled-down conductive rod coaxially arranged within the scaled-down cylinder. The scaled-down conductive rod is used for direct or indirect conductive connection to a high-voltage conductor inside the high-voltage bushing. A space between the scaled-down conductive rod and the cylinder wall of the scaled-down cylinder is used to place particles. A scaled-down insulator for supporting the scaled-down conductive rod is provided inside the scaled-down cylinder. A mounting base is provided between the scaled-down insulator and the scaled-down cylinder for mounting a particle trap inside the scaled-down cylinder. An observation port is provided on the scaled-down cylinder, and an observation window corresponding to the observation port is provided on the mounting cylinder.

[0008] The beneficial effects of the above technical solution are as follows: In the particle motion characteristic testing device of the present invention, a scaled-down cylinder assembly is fixedly installed inside the mounting cylinder. The scaled-down cylinder assembly is proportionally smaller than the GIS equipment cylinder. Since the voltage applied to the testing device is equivalent to the voltage applied to the GIS equipment cylinder, the particle motion characteristic test in the testing device can accurately reflect the actual motion characteristics of the particles in the GIS equipment cylinder, as well as the discharge and adsorption conditions. This is beneficial for the rational design of the particle capture structure in the GIS equipment cylinder, reducing insulation problems caused by particles, ensuring the reliability of the GIS equipment, and also enabling the early research and determination of the optimal particle capture design scheme for new products. In addition, compared with the GIS equipment, since the scaled-down cylinder assembly only needs to ensure the normal testing of particle motion characteristics, it does not need to be manufactured as a complete GIS equipment. Therefore, the structure of the GIS equipment is simplified, the number of parts used is reduced, and the manufacturing cost is lowered. Compared with the GIS equipment cylinder, since the scaled-down cylinder assembly is proportionally smaller, the material used for manufacturing parts can be reduced, thereby further reducing the manufacturing cost. In addition, since the space inside the scaled-down cylinder is smaller, fewer particles are needed for testing, thus also reducing the testing cost.

[0009] Furthermore, at least two scaled-down cylinders are provided, and the scaled-down insulator includes an intermediate scaled-down insulator connected between each scaled-down cylinder. Each intermediate scaled-down insulator has a mounting seat on both sides of its axial direction. The observation port includes an opening on the cylinder wall of the scaled-down cylinder, and the observation window includes a cylinder wall observation window on the cylinder wall of the mounting cylinder that corresponds to the opening.

[0010] The beneficial effects of the above technical solution are as follows: setting at least two scaled-down cylinders, and since mounting seats are provided on both sides of the axial direction of the intermediate scaled-down insulator connected between each scaled-down cylinder, multiple sets of tests can be performed simultaneously, which is beneficial to improving test efficiency. It is also beneficial to provide more reliable data for the rational design of the particle capture structure, which in turn is more conducive to the rational design of the particle capture structure. Through the openings set on the scaled-down cylinders and the observation windows on the cylinder walls of the mounting cylinders, it is convenient to observe the movement trajectory of particles in the scaled-down cylinders as well as the discharge and adsorption conditions.

[0011] Furthermore, each of the scaled-down cylinders has an end scaled-down cylinder located at one end in the axial direction. The end scaled-down cylinder has a first end disposed away from the intermediate scaled-down insulator. The scaled-down insulator also includes an end scaled-down insulator installed at the first end. The mounting seat is provided between the end scaled-down insulator and the first end.

[0012] The beneficial effects of the above technical solution are as follows: by installing an end-scaled insulator at the first end of the end-scaled cylinder, the space and structure of the end-scaled cylinder can be fully utilized, further increasing the number of test groups that can be tested simultaneously, which is conducive to further improving test efficiency and providing more test data.

[0013] Furthermore, the opening is radially corresponding to the mounting base, and the size of the opening is larger than the size of the particulate trap, so as to form a mounting port for installing and removing the particulate trap.

[0014] The beneficial effects of the above technical solution are: the opening facilitates the installation and disassembly of the particulate trap inside the scaled-down cylinder, which helps to improve work efficiency.

[0015] Furthermore, the scaled-down conductive rod is used to be disposed on the radial inner side of the particle trap, and the axial dimension of the scaled-down conductive rod is larger than the axial dimension of the particle trap.

[0016] The beneficial effect of the above technical solution is that the axial dimension of the scaled conductive rod is set to be larger than the axial dimension of the particle trap, so that the particle trap can be installed directly in the radial direction, thus avoiding the inconvenience caused by the inability to install it in the radial direction.

[0017] Furthermore, the mounting cylinder has a first connecting end for placement near the high-pressure bushing and a second connecting end for placement away from the high-pressure bushing. A cap is installed at the port of the second connecting end. The scaled-down cylinder near the cap has a second end for connection with the cap. The cap is provided with a side observation window corresponding to the port of the second end.

[0018] The beneficial effect of the above technical solution is that by setting a side observation window on the cover that corresponds to the port of the second end of the scaled-down cylinder, the movement trajectory of the particles inside the scaled-down cylinder can be observed more three-dimensionally based on the observation window on the cylinder wall and the side observation window, and thus the movement characteristics of the particles can be accurately obtained.

[0019] Furthermore, a particle motion trajectory capturing instrument is installed outside the mounting cylinder at the side observation window, and the particle motion trajectory capturing instrument is used to record the motion trajectory of the particles.

[0020] The beneficial effects of the above technical solution are as follows: by setting up a particle motion trajectory capture instrument, it is not necessary to observe the movement of particles at all times, which facilitates the recording of particle motion trajectories and helps to improve the accuracy of test results.

[0021] Furthermore, the mounting cylinder has a first connecting end for placement near the high-voltage bushing and a second connecting end for placement away from the high-voltage bushing. The first connecting end is connected to a transition cylinder for connection with the high-voltage bushing. A transition conductive rod is provided inside the transition cylinder. One end of the transition conductive rod is used for conductive connection with the high-voltage conductor inside the high-voltage bushing, and the other end is directly or indirectly conductively connected to the scaled-down conductive rod.

[0022] The beneficial effect of the above technical solution is that the transition conductive rod inside the transition cylinder can realize the connection conversion between the high-voltage conductor and the scaled conductive rod inside the high-voltage sleeve, which facilitates the conductive connection between the high-voltage conductor and the scaled conductive rod.

[0023] Furthermore, the mounting cylinder and the transition cylinder are rotatably fitted together.

[0024] The beneficial effect of the above technical solution is that, when observing the movement trajectory of particles, the rotational cooperation between the mounting cylinder and the transition cylinder allows the movement trajectory of particles to be observed from different angles, expanding the observation range and thus further ensuring the accurate testing of particle motion characteristics.

[0025] Furthermore, a lighting device is installed inside the scaled-down cylinder.

[0026] The beneficial effects of the above technical solution are that it allows for a clearer observation of the particle's trajectory and the particle's capture status, further facilitating the use of the testing device. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the particle characteristic testing device in this invention;

[0028] Figure 2 yes Figure 1 Side view;

[0029] Figure 3 This is a schematic diagram of the assembly of the scaled-down cylindrical component in the particle characteristic testing device of the present invention within the mounting cylinder.

[0030] Figure 4 This is an assembly diagram of the particle trap in the particle characteristic testing device of the present invention on the convex side of the intermediate scaled insulator;

[0031] Figure 5 This is an assembly diagram of the particle trap in the particle characteristic testing device of the present invention on the concave side of the intermediate scaled insulator;

[0032] Figure 6 This is a schematic diagram of the particle trap in the particle characteristic testing device of the present invention;

[0033] Figure 7 yes Figure 6 Side view;

[0034] Figure 8 This is a diagram showing the positional relationship between the particle trap and the second scaled-down cylinder wall in the particle characteristic testing device of the present invention.

[0035] In the diagram: 10, First support; 20, Second support; 30, Mounting cylinder; 31, First observation window; 32, Second observation window; 40, Cover; 50, Side observation window; 60, First scaled-down cylinder; 61, First opening; 70, Second scaled-down cylinder; 71, Second opening; 80, First scaled-down conductive rod; 90, Second scaled-down conductive rod; 100, Intermediate scaled-down insulator; 110, End scaled-down insulator; 120, Intermediate conductive rod; 130, Transition cylinder; 140, Transition conductive rod; 150, High-voltage bushing; 160, First insulator; 170, Second insulator; 180, Particle trapping assembly; 181, Mounting base; 182, Particle trap; 183, Annular protrusion; 184, Grid opening; 185, Grid baffle; 186, Notch. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] It should be noted that, in specific embodiments of the present invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the use of phrases such as "comprising a…" to define an element does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] In the description of this invention, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the body, or it can be separately arranged from the body and connected to the body. This connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0041] The present invention will be further described in detail below with reference to the embodiments.

[0042] Example 1 of the particle motion characteristic testing device of the present invention:

[0043] In this embodiment, the particle motion characteristic testing device (hereinafter referred to as the "testing device") is suitable for DC GIS and is used to test the motion characteristics of metal particles. The testing device is connected to a high-voltage bushing 150, and a high-voltage conductor is provided inside the high-voltage bushing 150 to apply an equivalent voltage to the testing device that is equivalent to the voltage inside the DC GIS equipment cylinder. Specifically, in this embodiment, the testing device is designed based on DC 550 GIS, that is, the equivalent voltage is 550V.

[0044] like Figure 1 and Figure 2 As shown, the testing device includes a horizontally arranged mounting cylinder 30. The mounting cylinder 30 has a first connecting end located near the high-voltage bushing 150 and a second connecting end located away from the high-voltage bushing 150. A cap 40 is bolted to the port of the second connecting end, effectively sealing the port. A transition cylinder 130 is bolted between the first connecting end and the high-voltage bushing 150, meaning the mounting cylinder 30 is indirectly connected to the high-voltage bushing 150 via the transition cylinder 130. The transition cylinder 130 and the mounting cylinder 30 extend in the same direction. A first insulator 160 connects the transition cylinder 130 to the mounting cylinder 30, and a second insulator 170 connects the transition cylinder 130 to the high-voltage bushing 150. The first insulator 160 and the second insulator 170 separate the interior of the transition cylinder 130 from the interior of the mounting cylinder 30 and the high-voltage bushing 150, respectively. During the use of the testing device, SF6 insulating gas needs to be filled into the transition cylinder 130.

[0045] like Figure 1 As shown, a transition conductive rod 140 is provided inside the transition cylinder 130 and is arranged coaxially therewith. The two ends of the transition conductive rod 140 are respectively installed on the first insulator 160 and the second insulator 170, and the transition conductive rod 140 is electrically connected to the high voltage conductor inside the high voltage bushing 150.

[0046] like Figure 1 and Figure 3 As shown, a scaled-down cylinder assembly is fixedly installed inside the mounting cylinder 30. The scaled-down cylinder assembly is composed of the internal structure of the DC GIS equipment cylinder, which is scaled down according to the original structure. That is, the scaled-down cylinder assembly is a scaled-down prototype of the original DC GIS equipment cylinder. The specific size parameters and test pressure parameters of the scaled-down prototype need to be determined by electric field simulation based on the voltage level of the GIS equipment.

[0047] like Figure 1 and Figure 3As shown, the scaled-down cylinder assembly includes two scaled-down cylinders. With the direction of the second connecting end of the mounting cylinder 30 defined as the left direction and the direction of the first connecting end of the mounting cylinder 30 defined as the right direction, the two scaled-down cylinders are a first scaled-down cylinder 60 and a second scaled-down cylinder 70 arranged sequentially from left to right. Both the first scaled-down cylinder 60 and the second scaled-down cylinder 70 are coaxially arranged with the mounting cylinder 30. In this configuration, the first scaled-down cylinder 60 constitutes the end scaled-down cylinder located at the left end, and the second scaled-down cylinder 70 constitutes the end scaled-down cylinder located at the right end. The right end of the second scaled-down cylinder 70 is the first end of the two scaled-down cylinders, and the left end of the first scaled-down cylinder 60 is the second end of the two scaled-down cylinders. The first scaled-down cylinder 60 and the second scaled-down cylinder 70 are connected by bolts, and an intermediate scaled-down insulator 100 is also bolted between them. The left end of the first scaled cylinder 60 is fixed to the cover 40 by bolts, that is, the second end is fixed to the cover 40. The right end of the second scaled cylinder 70 is connected to the end scaled insulator 110 by bolts, that is, the first end is connected to the end scaled insulator 110, and the end scaled insulator 110 is fixed to the cylinder wall of the mounting cylinder 30 by multiple bolts threaded on its circumferential side. The right end of the second scaled cylinder 70 is supported in the mounting cylinder 30 by the end scaled insulator 110.

[0048] like Figure 1 and Figure 3 As shown, a first scaled-down conductive rod 80 is installed coaxially within a first scaled-down cylindrical body 60, and a second scaled-down conductive rod 90 is installed coaxially within a second scaled-down cylindrical body 70. The right end of the first scaled-down conductive rod 80 is mounted on an intermediate scaled-down insulator 100, and its left end is suspended. The left end of the second scaled-down conductive rod 90 is mounted on an intermediate scaled-down insulator 100, and its right end is mounted on an end scaled-down insulator 110. The first and second scaled-down conductive rods 80 are electrically connected. Furthermore, the space between the scaled-down conductive rod and the corresponding scaled-down cylindrical body can be used to place metal particles; specifically, the metal particles are placed between the bottom of the scaled-down conductive rod and the corresponding scaled-down cylindrical body.

[0049] The mounting cylinder 30 is equipped with an intermediate conductive rod 120 located outside the scaled-down cylinder. The intermediate conductive rod 120 is located between the end scaled-down insulator 110 and the first insulator 160. The left end of the intermediate conductive rod 120 is installed on the end scaled-down insulator 110, and the right end of the intermediate conductive rod 120 is installed on the first insulator 160. The intermediate conductive rod 120 is electrically connected to the second conductive rod and the transition conductive rod 140 respectively. In this way, the second scaled-down conductive rod 90 can be indirectly electrically connected to the high-voltage conductor in the high-voltage bushing 150 through the intermediate conductive rod 120 and the transition conductive rod 140.

[0050] like Figure 3 , Figure 4 as well as Figure 5 As shown, both the intermediate scaled-down insulator 100 and the end scaled-down insulator 110 are basin-type insulators. The axial sides of the intermediate scaled-down insulator 100 and the end scaled-down insulator 110 are convex and concave, respectively. Specifically, the convex side of the intermediate scaled-down insulator 100 is located inside the first scaled-down cylindrical body 60, and the concave side is located inside the second scaled-down cylindrical body 70. The convex side of the end scaled-down insulator 110 is located inside the second scaled-down cylindrical body 70, and the concave side is located outside the second scaled-down cylindrical body 70. Mounting seats 181 are bolted to both axial sides of the intermediate scaled-down insulator 100 and the first and second scaled-down cylindrical bodies 60, respectively. Mounting seats 181 are also bolted to the right end of the second scaled-down cylindrical body 70 and the end scaled-down insulator 110. Each mounting seat 181 has a particle trap 182 inserted into its corresponding scaled-down cylindrical body. The mounting seats 181 and the particle traps 182 constitute a particle trapping assembly 180.

[0051] like Figure 4 and Figure 5 As shown, the particle trap 182 is cylindrical and coaxially arranged with the scaled-down cylindrical body. The particle trap 182 is sleeved on the circumferential outside of the corresponding scaled-down conductive rod, meaning the scaled-down conductive rod is located radially inside the corresponding particle trap 182. The axial dimension of each scaled-down conductive rod is larger than the axial dimension of the particle trap 182. One axial end of the particle trap 182 has a radially outwardly protruding annular protrusion 183, which facilitates the insertion and installation between the particle trap 182 and the corresponding mounting base 181. The particle trap 182 has a grid structure located at its lower part, including grid openings 184 and grid baffles 185. The grid openings 184 allow metal particles to enter the particle trap 182, completing the capture of the metal particles. Additionally, as... Figure 6 and Figure 7 As shown, relative to the concentric circle where the particulate trap 182 is located, the grid opening 184 has an opening angle Q1 relative to the center of the concentric circle, the grid baffle 185 has a baffle angle Q2 relative to the center of the concentric circle, the opening width of the grid opening 184 in the axial direction is L1, the width of the grid baffle 185 in the axial direction is L2, and the length of the entire particulate trap 182 in the axial direction is L3. The radial width of the other part of the particulate trap 182 located on the axial side of the annular protrusion 183 is 2mm and remains unchanged, that is, the thickness of the shell of the particulate trap 182 is 2mm.

[0052] like Figure 8As shown, there is a certain distance H between the bottom of each particle trap 182 and the inner wall of the corresponding scaled-down cylinder. This distance H is the trap height of the particle trap 182. In order to make the particle trap 182 have a better trapping effect, the specific value of the distance H needs to be determined according to the opening angle Q1, the baffle angle Q2, the opening width L1, the baffle width L2, and the axial length L3 of the particle trap 182. For example:

[0053] When L1 = 3mm, L2 = 3mm, Q1 = 30°, Q2 = 5°, and L3 = 60mm, H is set to 2mm, 4mm, 6mm, 8mm, and 10mm.

[0054] When L2 = 3mm, Q1 = 30°, Q2 = 5°, L3 = 60mm, and H = 6mm, L1 is set to 3mm, 4.5mm, and 6mm.

[0055] When L1 = 3mm, L2 = 3mm, Q1 = 30°, Q2 = 5°, and H = 6mm, L3 is set to 25mm, 40mm, 60mm, and 80mm.

[0056] Different parameters correspond to different grid structures. It should be noted that the specific parameters of the grid structure are not limited to the specifications mentioned above. The specific values ​​can be redefined according to actual usage requirements.

[0057] like Figure 1 and Figure 3 As shown, to facilitate observation of the movement characteristics, discharge, and adsorption of metal particles within the first scaled-down cylinder 60 and the second scaled-down cylinder 70, the upper part of the first scaled-down cylinder 60 has an axially extending first opening 61, and the upper part of the second scaled-down cylinder 70 has an axially extending second opening 71. The mounting cylinder 30 is provided with observation windows on its wall, including a first observation window 31 corresponding to the first opening 61 and a second observation window 32 corresponding to the second opening 71. The dimensions of both the first opening 61 and the second opening 71 are larger than the size of the particle trap, thus allowing the particle trap 182 to be installed and removed within the corresponding scaled-down cylinder. The first opening 61 and the second opening 71 form an installation port for the particle trap 182 to be installed and removed.

[0058] like Figure 1 and Figure 3As shown, the cover 40 is provided with a side observation window 50 corresponding axially to the left end port of the first scaled-down cylinder 60, and a particle motion trajectory capture device located outside the mounting cylinder 30 is installed at the side observation window 50. This allows for the recording of the motion trajectory of metal particles within the first scaled-down cylinder 60, which is more conducive to the study of the motion characteristics of metal particles. Both the first scaled-down cylinder 60 and the second scaled-down cylinder 70 are equipped with light strips. These light strips increase the light source within the scaled-down cylinders, making it easier to observe the motion trajectory of metal particles and the discharge and adsorption processes. Figure 7 As shown, in order to avoid the metal particle trap 182 from obstructing the viewing angle, the metal particle trap 182 is provided with a notch 186 corresponding to the corresponding opening.

[0059] To increase the observation angle, the mounting cylinder 30 and the transition cylinder 130 are connected by adjusting bolts, allowing the mounting cylinder 30 to rotate relative to the transition cylinder 130. Since both have 24 bolt holes on their connecting flanges, the minimum angle the mounting cylinder 30 can rotate at one time is 15°. Figure 2 This is a diagram showing the state of the installed cylinder 30 with a rotation angle of 60°.

[0060] like Figure 1 and Figure 2 As shown, a first support 10 is provided below the left end of the mounting cylinder 30, and a second support 20 is also provided below the high-pressure bushing 150. The first support 10 and the second support 20 can keep the test device horizontally installed to avoid the side-mounted device from being oblique and affecting the test results, and can also lift the test device off the ground.

[0061] The working principle of the particle motion characteristic testing device in this invention is as follows:

[0062] When testing different metal particles, different metal particles are placed near the convex side, concave side and convex side of the middle scaled insulator 100 and the end scaled insulator 110 respectively. SF6 gas is filled into the test device, and then a voltage is applied to the test device. The voltage is slowly increased until it is equivalent to the field strength of the DC 320GIS in actual operation. The motion characteristics of the particles and the discharge and adsorption during this period are observed and recorded.

[0063] When testing the capture effect of different particle traps, the first step is to place the same type of metal particles near the convex side, concave side, and convex side of the intermediate scaled-down insulator 100 and the end scaled-down insulator 110 respectively without installing the particle trap 182 in the test device. SF6 gas is then introduced into the test device, and a voltage is applied and slowly increased until it is equivalent to the field strength of the 320GIS in actual operation. The movement characteristics, discharge, and adsorption of the particles during this period are observed and recorded. The second step involves installing different particle traps 182 on the concave and convex sides of the intermediate scaled-down insulator 100 and the convex side of the end scaled-down insulator 110 respectively. SF6 gas is then introduced into the test device, and a voltage is applied and slowly increased until it is equivalent to the field strength of the 320GIS in actual operation. The movement characteristics, discharge, and adsorption of the particles during this period are observed and recorded, and compared with the test results without installing the particle trap 182, in order to select the particle trap 182 with better capture effect.

[0064] It should be noted that the particle motion characteristic testing device of this invention can also be used in AC GIS, and can also be used to test the motion characteristics of dust inside the GIS equipment cylinder. Furthermore, the particle motion characteristic testing device of this invention can also be designed based on DC GIS / GIL at other voltage levels. However, if the voltage level is changed for related research, electric field simulation needs to be performed based on the scaled-down prototype size to redetermine the actual pressurization parameters.

[0065] In the particle motion characteristic testing device of the present invention, a scaled-down cylinder assembly is fixedly installed inside the mounting cylinder. The scaled-down cylinder assembly is proportionally smaller than the GIS equipment cylinder. Since the voltage applied to the testing device is equivalent to the voltage applied to the GIS equipment cylinder, the particle motion characteristic test within the testing device can accurately reflect the actual motion characteristics, discharge, and adsorption of particles within the GIS equipment cylinder. This facilitates the rational design of the particle capture structure within the GIS equipment cylinder, reduces insulation problems caused by particles, ensures the reliability of the GIS equipment, and allows for proactive research to determine the optimal particle capture design for new products. Furthermore, compared to the GIS equipment, the scaled-down cylinder assembly only needs to ensure normal testing of particle motion characteristics and does not need to be manufactured as a complete GIS equipment. This simplifies the structure of the GIS equipment, reduces the number of parts used, and lowers manufacturing costs. Compared to the GIS equipment cylinder, the scaled-down cylinder assembly is proportionally smaller, thus reducing the material used for manufacturing parts and further reducing manufacturing costs. Additionally, due to the smaller space within the scaled-down cylinder, the axial dimension of the scaled-down conductive rod required for testing is larger than the axial dimension of the particle catcher, resulting in fewer particles and further reducing testing costs.

[0066] Example 2 of the particle motion characteristic testing device of the present invention:

[0067] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, there are two scaled-down cylinders, namely a first scaled-down cylinder 60 and a second scaled-down cylinder 70, with an intermediate scaled-down insulator 100 connecting the first scaled-down cylinder 60 and the second scaled-down cylinder 70. An end scaled-down insulator 110 is installed at the end of the second scaled-down cylinder 70 away from the intermediate scaled-down insulator 100. In this embodiment, there is only one scaled-down cylinder, with end scaled-down insulators 110 at both ends. In this case, the cylinder wall of the scaled-down cylinder has an opening, and the cylinder wall of the mounting cylinder 30 has an observation window corresponding to the opening. In this case, there is no need to set a side observation window 50. In other embodiments, there is only one scaled-down cylinder, with an end scaled-down insulator 110 installed at the end of the scaled-down cylinder away from the cover 40, and the end closer to the cover 40 connected to the cover 40. The port of this end corresponds axially with the side observation window 50 on the cover 40. In this case, there is no need to set an opening on the cylinder wall of the scaled-down cylinder.

[0068] Example 3 of the particle motion characteristic testing device of the present invention:

[0069] The difference between this embodiment and Embodiment 1 is that Embodiment 1 has two scaled-down cylinders, while this embodiment has three. In other embodiments, there may be four, five, or more scaled-down cylinders, as long as the number of scaled-down cylinders meets the testing requirements.

[0070] Example 4 of the particle motion characteristic testing device of the present invention:

[0071] The difference between this embodiment and Embodiment 1 is that, in Embodiment 1, an intermediate scaled insulator 100 is connected between the first scaled cylindrical body 60 and the second scaled cylindrical body 70, and an end scaled insulator 110 is installed at the end of the second scaled cylindrical body 70 away from the intermediate scaled insulator 100. In this embodiment, however, the intermediate scaled insulator 100 is only connected between the first scaled cylindrical body 60 and the second scaled cylindrical body 70.

[0072] Example 5 of the particle motion characteristic testing device of the present invention:

[0073] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, a particle motion trajectory capturing instrument corresponding to the side observation window 50 is installed outside the mounting cylinder 30, and the particle motion trajectory capturing instrument is used to record the motion trajectory of metal particles. In this embodiment, the motion trajectory of metal particles is observed and recorded manually.

[0074] Example 6 of the particle motion characteristic testing device of the present invention:

[0075] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the mounting cylinder 30 and the transition cylinder 130 are rotatably coupled, allowing for multi-angle observation of the movement trajectory of the metal particles through the rotation of the mounting cylinder 30. In this embodiment, however, the movement trajectory of the metal particles is observed within a specific angular range through an observation window.

[0076] Example 7 of the particle motion characteristic testing device of the present invention:

[0077] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the mounting cylinder 30 is indirectly connected to the high-voltage bushing 150 via the transition cylinder 130. In this case, the scaled-down conductive rod is indirectly connected to the high-voltage conductor inside the high-voltage bushing 150. In this embodiment, however, the mounting cylinder 30 is directly connected to the high-voltage bushing 150, and the scaled-down conductive rod is also directly connected to the high-voltage conductor inside the high-voltage bushing 150. In other embodiments, the mounting cylinder 30 is directly connected to the high-voltage bushing 150, and the scaled-down conductive rod is indirectly connected to the high-voltage conductor inside the high-voltage bushing 150.

[0078] Example 8 of the particle motion characteristic testing device of the present invention:

[0079] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the scaled-down conductive rod is indirectly connected to the transition power-off rod 140 via the intermediate conductive rod 120. In this embodiment, however, the scaled-down conductive rod is directly connected to the transition power-off rod 140.

[0080] Example 9 of the particle motion characteristic testing device of the present invention:

[0081] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the particulate trap 182 is plugged into the mounting base. In this embodiment, the particulate trap 182 is fixedly mounted on the mounting base with bolts.

[0082] Example 10 of the particle motion characteristic testing device of the present invention:

[0083] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the size of the opening is larger than the size of the particulate trap, and the particulate trap 182 is installed and removed from the scaled-down cylinder through the opening. In other embodiments, when the size of the opening is smaller than the size of the particulate trap 182, or when no opening is provided on the scaled-down cylinder, the particulate trap 182 can be installed and removed through the port at the axial end of the scaled-down cylinder. In this case, the axial length of the scaled-down cylinder cannot be too long.

[0084] Example 11 of the particle motion characteristic testing device of the present invention:

[0085] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the axial dimension of the scaled-down conductive rod is larger than the axial dimension of the particle trap 182. In this case, the particle trap 182 can be installed radially through the opening on the scaled-down cylinder. In this embodiment, however, the axial dimension of the scaled-down conductive rod is smaller than the axial dimension of the particle trap 182. In this case, the particle trap 182 can only be installed axially through the port at the axial end of the scaled-down cylinder.

[0086] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A device for testing the motion characteristics of particles, characterized in that, The device includes a mounting cylinder (30) for direct or indirect connection to a high-voltage bushing (150) to apply an equivalent voltage to the GIS equipment cylinder. A scaled-down cylinder assembly, proportionally reduced to the GIS equipment cylinder, is fixedly installed inside the mounting cylinder (30). The scaled-down cylinder assembly includes a scaled-down cylinder coaxially arranged with the mounting cylinder (30) and a scaled-down conductive rod coaxially arranged within the scaled-down cylinder. The scaled-down conductive rod is used for direct or indirect conduction with the high-voltage conductor inside the high-voltage bushing (150). The cylindrical wall of the scaled-down conductive rod and the scaled-down cylindrical body are connected and used to place particles; the scaled-down cylindrical body is provided with a scaled-down insulator for supporting the scaled-down conductive rod, and a mounting seat (181) is provided between the scaled-down insulator and the scaled-down cylindrical body. The mounting seat (181) is used to install a particle trap (182) in the scaled-down cylindrical body. The scaled-down cylindrical body is provided with an observation port, and the mounting cylinder (30) is provided with an observation window corresponding to the observation port. The size parameters and test pressure parameters of the scaled-down cylindrical body assembly are configured so that its internal electric field is equivalent to the electric field inside the GIS equipment cylinder.

2. The particle motion characteristic testing device according to claim 1, characterized in that, The scaled-down cylinder is provided with at least two, and the scaled-down insulator includes an intermediate scaled-down insulator (100) connected between each scaled-down cylinder. Each intermediate scaled-down insulator (100) has a mounting seat (181) on both sides of its axial direction. The observation port includes an opening provided on the cylinder wall of the scaled-down cylinder, and the observation window includes a cylinder wall observation window provided on the cylinder wall of the mounting cylinder (30) and corresponding to the opening.

3. The particle motion characteristic testing device according to claim 2, characterized in that, Each of the scaled-down cylinders has an end scaled-down cylinder located at one end in the axial direction. The end scaled-down cylinder has a first end located away from the intermediate scaled-down insulator (100). The scaled-down insulator also includes an end scaled-down insulator (110) installed at the first end. The mounting seat (181) is provided between the end scaled-down insulator (110) and the first end.

4. The particle motion characteristic testing device according to claim 2 or 3, characterized in that, The opening is radially corresponding to the mounting base (181), and the size of the opening is larger than the size of the particle trap (182) to form a mounting port for installing and removing the particle trap (182).

5. The particle motion characteristic testing device according to claim 4, characterized in that, The scaled-down conductive rod is used to be disposed on the radial inner side of the particle trap (182), and the axial dimension of the scaled-down conductive rod is larger than the axial dimension of the particle trap (182).

6. The particle motion characteristic testing device according to claim 2 or 3, characterized in that, The mounting cylinder (30) has a first connecting end for placement near the high-pressure bushing (150) and a second connecting end for placement away from the high-pressure bushing (150). A cap (40) is installed at the port of the second connecting end. The scaled-down cylinder near the cap (40) has a second end for connection with the cap (40). The cap (40) is provided with a side observation window (50) corresponding to the port of the second end.

7. The particle motion characteristic testing device according to claim 6, characterized in that, A particle motion trajectory capturing instrument is installed outside the mounting cylinder (30) at the side observation window (50), and the particle motion trajectory capturing instrument is used to record the motion trajectory of particles.

8. The particle motion characteristic testing device according to any one of claims 1 to 3, characterized in that, The mounting cylinder (30) has a first connecting end for placement near the high-voltage bushing (150) and a second connecting end for placement away from the high-voltage bushing (150). The first connecting end is connected to a transition cylinder (130) for connection with the high-voltage bushing (150). A transition conductive rod (140) is provided inside the transition cylinder (130). One end of the transition conductive rod (140) is used for conductive connection with the high-voltage conductor inside the high-voltage bushing (150), and the other end is directly or indirectly conductively connected to the scaled-down conductive rod.

9. The particle motion characteristic testing device according to claim 8, characterized in that, The mounting cylinder (30) and the transition cylinder (130) are rotated together.

10. The particle motion characteristic testing device according to any one of claims 1 to 3, characterized in that, The scaled-down cylinder is equipped with lighting equipment.

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