A high-voltage switch insulating rod insulation testing device

Abstract

The utility model belongs to the field of insulating rod test, disclose a kind of high voltage switch insulating rod insulation test device, the installation seat with multiple sets of adjusting plug is arranged respectively in switch casing high voltage side and low voltage side by this device, make insulating rod be inserted and form independent test loop between corresponding plug;High / low voltage side shielding can simulate the actual working condition of insulating rod, sealing cover plate is connected with protective sleeve and can shield external interference, and each low voltage side adjusting plug is separately connected signal line and passes out protective sleeve.Using this device breaks through the limitation of traditional device without signal channel and shunt structure, makes distributed pulse current method detection possible: multi-channel parallel test significantly improves detection efficiency, independent signal acquisition avoids crosstalk to improve the detection accuracy of partial discharge, shielding and protection design ensure signal transmission stability, overall solve the key problem that detection efficiency and precision are limited.

Description

Technical Field

[0001] This utility model belongs to the field of high voltage switch technology, specifically to the field of insulating rod testing, and particularly to an insulation testing device for high voltage switch insulating rods. Background Technology

[0002] In the field of high-voltage switchgear, the insulating rod of a high-voltage switchgear serves as a core transmission component, possessing the dual functions of transmitting operating force and providing high-voltage electrical isolation. Its insulation performance directly affects the reliability of equipment operation. Currently, the mainstream technology for testing the insulation performance of insulating rods in the industry adopts the pulse current method. This method, with its advantages of simple measurement circuit, low equipment cost, and high quantitative accuracy of discharge quantity, is widely used in factory testing and laboratory certification of insulating rods, providing crucial technical support for the insulation performance testing of insulating rods.

[0003] Existing pulse current detection techniques have significant limitations, specifically: they can only acquire the overall discharge quantity and cannot pinpoint the location of the discharge source; and they are limited by narrow frequency band detection, resulting in insufficient sensitivity for weak discharges and high-frequency discharges (such as surface discharges). Therefore, to overcome these technical bottlenecks, those skilled in the art have proposed the distributed pulse current method. This method, through synchronous acquisition and cross-correlation processing of signals from multiple sensor nodes, effectively suppresses interference currents while locating the discharge source, significantly improving the signal-to-noise ratio and micro-discharge sensitivity in partial discharge detection. However, existing insulating rod insulation testing devices lack the design of signal transmission channels and shunt structures for both inside and outside the gas chamber, making it impossible to meet the experimental conditions for distributed pulse current detection, thus limiting the limitations of this method.

[0004] It is evident that the existing insulation testing device for insulating rods lacks the design of signal transmission channels and current shunting structures for both the interior and exterior of the chamber, which prevents the application of the distributed pulse current method for detection. This affects the multi-channel parallel testing of insulating rods, resulting in low detection efficiency and accuracy. Utility Model Content

[0005] This invention provides an insulation testing device for high-voltage switch insulating rods. Using this testing device, multi-channel parallel testing is achieved, which simultaneously improves detection efficiency and partial discharge detection accuracy.

[0006] To achieve the above objectives, the present invention adopts the following technical content:

[0007] An insulation testing device for a high-voltage switch insulating rod includes: a high-voltage side mounting base and a low-voltage side mounting base;

[0008] The high-voltage side mounting base is fixed to the high-voltage side of the high-voltage switch housing;

[0009] The low-voltage side mounting base is fixed to the low-voltage side of the high-voltage switch housing;

[0010] The high-voltage side mounting base is provided with multiple high-voltage side adjustment plugs around its circumference.

[0011] The low-voltage side mounting base is provided with multiple low-voltage side adjustment plugs around its circumference, and the number of low-voltage side adjustment plugs corresponds to the number of high-voltage side adjustment plugs.

[0012] The insulating rod is inserted between a set of matching high-voltage side regulating plugs and low-voltage side regulating plugs;

[0013] One side of the high-voltage side mounting base is provided with a high-voltage side shield, and the other side is connected to the basin-type insulator of the shell.

[0014] One side of the low-pressure side mounting base is provided with a low-pressure side shield, and the other side is connected to the sealing cover plate of the housing.

[0015] Each insulating rod passes through the low-voltage side shield and is connected to the low-voltage side regulating plug;

[0016] A protective sleeve is provided on the outside of the sealing cover plate;

[0017] Each of the low-voltage side regulating plugs is connected to a signal line, and each signal line is led out from the protective sleeve.

[0018] Furthermore, the high-voltage side mounting base is connected to the basin insulator of the housing by bolts.

[0019] Furthermore, the high-voltage side mounting base has multiple high-voltage side through holes evenly spaced around its circumference, and each high-voltage side adjustment plug is inserted into each high-voltage side through hole by interference fit; the low-voltage side mounting base has multiple low-voltage side through holes evenly spaced around its circumference, and each low-voltage side adjustment plug is fixed into each low-voltage side through hole by bolts.

[0020] Furthermore,

[0021] The high-voltage side regulating plug includes a transition shaft, a spring retaining ring, and a bearing;

[0022] The outer ring of the bearing is engaged with the high-pressure side through hole of the high-pressure side mounting base by an interference fit.

[0023] The transition shaft is clamped to the inner ring of the bearing by an interference fit.

[0024] The spring retaining ring is engaged in the retaining ring groove of the high-voltage side mounting base to limit the axial displacement of the transition shaft.

[0025] Furthermore, the insulating rod is connected to the high-voltage side regulating plug using a flat key; the insulating rod is also connected to the low-voltage side regulating plug using a flat key.

[0026] Furthermore, a sealing terminal plate is fixed inside the protective sleeve, and the sealing terminal plate and the sealing cover plate form a signal channel; the end of the low-voltage side adjustment plug is integrated with a standard connector that plugs into the sealing terminal plate; the sealing terminal plate is connected to the signal line to realize the connection between the low-voltage side adjustment plug and the signal line.

[0027] Furthermore, a cable channel is provided at the bottom of the protective sleeve; the signal line passes through the cable channel and is connected to the partial discharge detector.

[0028] Furthermore, one end of the protective sleeve is connected to the sealing cover plate, and the other end is connected to the protective sleeve cover plate.

[0029] Furthermore, the low-voltage side shield is fixed to the sealing cover plate by bolts; the high-voltage side shield is fixed to the basin insulator by bolts.

[0030] Furthermore, the low-voltage side mounting base is made of insulating material to form a dielectric barrier; the dielectric barrier is used to isolate signal interference between multiple insulating rods.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] This invention provides an insulation testing device for high-voltage switch insulating rods. The device features mounting bases with multiple sets of adjusting plugs on both the high-voltage and low-voltage sides of the switch housing, allowing the insulating rods to be inserted into corresponding plugs to form independent test circuits. Shielding on both sides simulates the actual working conditions of the insulating rods, and a protective sleeve externally connected to the sealing cover shields against interference. Each low-voltage side adjusting plug is individually connected to a signal line that extends through the protective sleeve. The high / low-voltage side plug array constructs a distributed physical channel, establishing a dedicated signal path for each insulating rod. The low-voltage side insulating mounting base separates the insulating rod signal, and the independent signal line design enables multi-channel signal splitting transmission. The protective sleeve ensures line reliability. This device overcomes the limitations of traditional devices lacking signal channels and splitting structures, making distributed pulse current method detection possible: multi-channel parallel testing significantly improves detection efficiency, independent signal acquisition avoids crosstalk to improve partial discharge detection accuracy, and the shielding and protection design ensures signal transmission stability. Overall, it solves the key problems of limited detection efficiency and accuracy.

[0033] Preferably, in this invention, the high-voltage side mounting base is connected to the basin-type insulator of the housing by bolts. This design enhances installation stability, ensures reliable fixation of the high-voltage side components during testing, and prevents loosening of the connection due to mechanical vibration or displacement. Simultaneously, the bolted connection facilitates maintenance and adjustment, improving the overall stability and durability of the device structure, thereby enhancing the accuracy and repeatability of test data.

[0034] Preferably, in this invention, the high-voltage and low-voltage mounting bases have uniformly spaced through holes around their circumferences, and the high-voltage side adjusting plug is inserted into the through holes of the high-voltage side mounting base via an interference fit. This interference fit design provides a tight mechanical connection, effectively preventing the plug from loosening or falling off under high-voltage conditions, ensuring the reliability and continuity of electrical contact. The uniformly spaced through hole layout also optimizes space utilization, simplifies the assembly process, and improves the overall rigidity and testing stability of the device.

[0035] Preferably, in this invention, the high-voltage side adjusting plug includes a transition shaft, a spring retaining ring, and a bearing. The outer ring of the bearing is interference-fitted into the through hole of the mounting seat, the inner ring is interference-fitted into the transition shaft, and the spring retaining ring restricts axial displacement. This standardized design simplifies manufacturing and maintenance; the bearing allows for fine-tuning rotation to compensate for assembly tolerances; the spring retaining ring prevents displacement, ensuring accurate alignment and long-term reliability of the plug under dynamic loads, thereby reducing wear and improving testing accuracy.

[0036] Preferably, in this invention, the insulating rod and the adjusting plug are connected by a flat key. The flat key design provides axial installation allowance for the insulating rod during installation, compensating for assembly deviations and manufacturing errors. This connection method also simplifies disassembly and replacement, enhances the modularity of the device, facilitates rapid installation and maintenance, and improves testing efficiency.

[0037] Preferably, in this invention, a sealed terminal plate is provided inside the protective sleeve, forming a signal channel with the sealed cover plate, and is connected to the low-voltage side regulating plug and signal line through a standard connector. This structure achieves sealed and standardized signal transmission, effectively preventing gas leakage and electromagnetic interference; the sealed terminal plate simplifies the wiring process, ensuring reliable signal transmission inside and outside the gas chamber, thereby improving the accuracy of partial discharge detection.

[0038] Preferably, in this invention, a cable channel is provided at the bottom of the protective sleeve, allowing the signal line to pass directly through and connect to the partial discharge detector. This design optimizes the external wiring path, avoids the risk of wire tangling or exposure; the cable channel facilitates centralized management and protection of the signal line, reduces the complexity of test setup, ensures convenient and reliable connection of external equipment, and improves overall test efficiency.

[0039] Preferably, in this invention, a sealing cover is connected to one end of the protective sleeve, and a protective sleeve cover is provided at the other end. The cover design provides an additional protective barrier to prevent dust, moisture, or physical damage from affecting the internal components; at the same time, it facilitates opening, maintenance, and inspection of signal lines, enhancing the protection and operability of the device and extending its service life.

[0040] Preferably, in this invention, the low-voltage side mounting base is made of insulating material. The insulating material provides excellent electrical isolation, effectively isolating partial discharge signals between multiple insulating rods, ensuring the accuracy and reliability of partial discharge signal acquisition. Attached Figure Description

[0041] Figure 1 A schematic diagram of the distributed pulse current method provided for an embodiment of the utility model;

[0042] Figure 2 A schematic diagram of the structure of an insulation testing device for a high-voltage switch insulating rod provided for an embodiment of the utility model;

[0043] Figure 3 A schematic diagram of the high-voltage side regulating plug structure provided for an embodiment of the utility model; wherein, (a) is a three-dimensional view; and (b) is a cross-sectional view;

[0044] Figure 4 This is a schematic diagram of the low-voltage side assembly of a high-voltage switch insulating rod insulation test device provided for an embodiment of the utility model.

[0045] Figure label:

[0046] 1. Basin-type insulator; 2. High-voltage side shield; 3. Insulating rod; 4. Low-voltage side shield; 5. Low-voltage side adjusting plug; 6. Protective sleeve; 7. Sealed terminal block; 8. Protective sleeve cover plate; 9. Signal line; 10. Low-voltage side mounting base; 11. Sealed cover plate; 12. Housing; 13. High-voltage side adjusting plug; 14. High-voltage side mounting base; 15. Transition shaft; 16. Spring retaining ring; 17. Bearing. Detailed Implementation

[0047] To make the technical problem solved by this utility model, the technical solution, and the beneficial effects clearer, the following specific embodiments provide a further detailed description of this utility model. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present 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 present invention without inventive effort are within the scope of protection of the present invention.

[0050] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0051] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] The technical terms involved in this utility model are explained as follows:

[0054] High-voltage switchgear: mainly used for switching devices related to power generation, transmission, distribution and power conversion, as well as combinations thereof with control, measurement, protection and regulation equipment, for closing or disconnecting one or more circuits.

[0055] Distributed pulse current method: a condition monitoring technology for electrical equipment, particularly for locating partial discharges and identifying insulation defects in high-voltage equipment. Its core lies in simultaneously measuring transient pulse current signals at multiple points, combined with signal processing, to achieve spatial localization and feature analysis of the pulse source. Compared to traditional single-point methods, it can effectively divert external noise current, significantly improving the detection signal-to-noise ratio and sensitivity.

[0056] As described in the background section, the insulating rod of a high-voltage switch, as a core transmission component, simultaneously performs the dual functions of transmitting operating force and providing high-voltage electrical isolation. Its insulation performance directly determines the reliability of the equipment operation. Current mainstream detection technology employs the pulse current method, which boasts advantages such as a simple measurement circuit, low equipment cost, and high quantitative accuracy of discharge quantity, and is widely used in factory testing and laboratory certification. However, this method also has certain limitations, such as: it can only acquire the overall discharge quantity and cannot pinpoint the location of the discharge source; it is limited by narrow-band detection, resulting in insufficient sensitivity for weak discharges and high-frequency discharges (such as surface discharges). To overcome these technical bottlenecks, a distributed pulse current method is proposed. Through synchronous acquisition by multiple sensor nodes and cross-correlation processing of signals, it effectively suppresses interference currents while locating the discharge source, significantly improving the signal-to-noise ratio and micro-discharge sensitivity in partial discharge detection. However, existing detection devices lack the design of signal transmission channels and shunt structures for both inside and outside the gas chamber, thus hindering the application of the distributed pulse current method.

[0057] For example, the distributed pulse current method, such as Figure 1 As shown, Figure 1 In this diagram, TZ represents a column-type voltage regulator, T represents a test transformer, Zs represents isolation impedance, Ck represents a coupling capacitor, Zk represents a measuring impedance, CT represents pipeline capacitance, CX1~CX3 represent insulation component capacitance, and ZX1~ZX3 represent measuring impedance. The specific principle is as follows: Multiple insulating components are connected in series with measuring impedances and grounded. During the test, the current flowing through the insulating component passes through the measuring impedance connected in series with it. The voltage across the measuring impedance is used for partial discharge detection. If a defect exists in one insulating component, the partial discharge measurement signal will be greater than that of other insulating components, thus indicating partial discharge in the insulating component. Simultaneously, the pulse current method distributed testing can shunt external noise current to each test circuit. Since the insulation component capacitance is relatively small, the noise current shunt to the insulating component is low, which can improve the sensitivity of the partial discharge test. For the insulating rod testing device, the detection signals of different insulating rods need to be isolated and led out of the gas chamber before being connected to the above-mentioned measuring circuit to achieve distributed pulse current method detection of the insulating rods.

[0058] To address the aforementioned issues, this embodiment provides an insulation testing device for high-voltage switchgear insulating rods. Specifically, it innovatively designs an insulating rod insulation testing device with a distributed pulse current method architecture, applying this device to the insulation testing of high-voltage switchgear insulating rods. Compared to existing insulating rod insulation testing devices, it achieves multi-channel parallel testing, improving detection efficiency while ensuring partial discharge detection accuracy. By changing different plugs and shielding, it can be adapted to various high-voltage switchgear insulating rods for insulation testing.

[0059] like Figure 2As shown, this embodiment provides an insulation testing device for a high-voltage switch insulating rod, including a high-voltage side mounting base 14 and a low-voltage side mounting base 10. The high-voltage side mounting base 14 is fixed to the high-voltage side basin insulator 1 of the high-voltage switch housing 12 by bolts, while the low-voltage side mounting base 10 is fixed to the low-voltage side of the housing 12. The high-voltage side mounting base 14 is circumferentially provided with a plurality of high-voltage side through holes for interference fitting of high-voltage side adjusting plugs 13, and the low-voltage side mounting base 10 is circumferentially provided with a corresponding number of low-voltage side through holes. The low-voltage side through holes are used to adjust the low-voltage side by bolt fixing. The plug 5 is fixed; each high-voltage side regulating plug 13 consists of a transition shaft 15, a spring retaining ring 16, and a bearing 17. The outer ring of the bearing 17 is interference-fitted into the high-voltage side through hole, the transition shaft 15 is interference-fitted into the inner ring of the bearing 17, and the spring retaining ring 16 is inserted into the retaining ring groove of the high-voltage side mounting base 14 to constrain the axial movement of the transition shaft 15; the insulating rod 3 is connected between a pair of mating high-voltage side regulating plugs 13 and low-voltage side regulating plugs 5 by a flat key; a high-voltage side shield 2 is provided on one side of the high-voltage side mounting base 14, and the other side is connected to the basin-type insulator of the housing 12. 1. The high-voltage side shield 2 is bolted to the basin-type insulator 1; one side of the low-voltage side mounting base 10 is connected to the housing 12 and the sealing cover plate 11, and the other side is provided with the low-voltage side shield 4, which is bolted to the sealing cover plate 11 and sleeved on the outside of the low-voltage side mounting base 10; the insulating rod 3 passes through the corresponding through hole on the low-voltage side shield 4 and is connected to the low-voltage side adjusting plug 5; the low-voltage side mounting base 10 provides a dielectric barrier to isolate the partial discharge signal between multiple insulating rods; a protective sleeve 6 is installed on the outside of the sealing cover plate 11, and its interior is fixed and sealed. Terminal block 7 and sealing cover plate 11 together form a signal channel. The brazed wire end of low voltage side adjustment plug 5 integrates a standard connector. The standard connector is inserted into sealing terminal block 7 to achieve electrical connection. Signal line 9 is connected to sealing terminal block 7 and then led out to partial discharge detector through the cable channel at the bottom of protective sleeve 6. Protective sleeve cover plate 8 is also connected to the end of protective sleeve 6. High voltage side mounting base 14 is made of aluminum alloy. Low voltage side mounting base 10 is made of insulating material to form a dielectric barrier. The formed dielectric barrier is used to isolate signal interference between multiple insulating rods 3.

[0060] Therefore, this embodiment features interchangeable adjustment plugs (low-voltage side adjustment plug 5 and high-voltage side adjustment plug 13) for connecting to the insulating rods 3 of different high-voltage switches. The adjustment plugs achieve quick connection to different insulating rods 3 via interfaces such as flat keys, splines, and bolts. While ensuring effective connection, it allows for axial and radial displacement adjustment of the insulating rod 3, eliminating assembly deviations and manufacturing errors, and improving installation adaptability.

[0061] This embodiment designs a distributed pulse current method architecture for the test device, which mainly consists of a low-voltage side adjusting plug with a lead wire (low-voltage side adjusting plug 5), a low-voltage side mounting base 10, and a low-voltage side sealed terminal plate 7. Specifically: the low-voltage side adjusting plug 5 integrates a standard connector at its end, allowing for quick blind insertion with the sealed terminal plate 7; the low-voltage side mounting base 10 is made of insulating material, isolating partial discharge signal interference between multiple rods through a dielectric barrier, enabling accurate identification of defective rods; the low-voltage side sealed terminal plate 7 is installed on the sealing cover plate 11 through a protective sleeve 6 to form a signal channel. While achieving signal communication between the inside and outside of the gas chamber, it also maintains the dielectric barrier between the multiple insulating rods 3, ensuring independent transmission of detection signals. Through the cooperation of these three components, the detection signals of multiple insulating rods 3 are isolated and led out of the gas chamber.

[0062] This embodiment features a protective sleeve 6 for the sealed terminal board 7, which is an integrally enclosed protective sleeve 6 installed on the outside of the sealed terminal board 7 and the signal line 9. The protective sleeve 6 has a pre-set cable channel, which can shield external interference current while protecting signal transmission, effectively improving the measurement signal-to-noise ratio.

[0063] For example, this embodiment also provides an assembly process for an insulation testing device for a high-voltage switch insulating rod, as detailed below:

[0064] like Figure 2 All parts are installed based on the housing 12. On the high-voltage side of the housing 12: first, the high-voltage side shield 2 and the high-voltage side mounting base 14 are bolted to the basin-type insulator 1. At the same time, the matching adjusting plug 13 is installed on the high-voltage side mounting base 14 by interference fit. Then, the basin-type insulator 1 is bolted to the housing 12. Figure 4 As shown, on the low-voltage side of the housing 12: first, the low-voltage side shield 4 and the low-voltage side insulation mounting base 10 are bolted to the sealing cover plate 11, and then the sealing cover plate 11 is bolted to the housing 12 to complete the preliminary assembly. When the insulation test is conducted, the insulation rod 3 will be installed.

[0065] When conducting insulation tests:

[0066] a) Complete the overall assembly of the insulation testing device:

[0067] First, insert the tested insulating rod 3 from the low-voltage side. One end of the insulating rod 3 is keyed to the high-voltage side regulating plug 13, and the other end is keyed to the low-voltage side regulating plug 5 with a lead wire. The regulating plug 5 is then bolted to the low-voltage side insulating mounting base 10. Next, the sealing terminal plate 7 is bolted to the flange of the protective sleeve 6, and the lead wire (standard connector) of the low-voltage side regulating plug 5 is inserted into the sealing terminal plate 7. Then, the protective sleeve 6 is bolted to the sealing cover plate 11 to complete the gas chamber seal. Finally, the signal line 9 is led out from the protective sleeve 6 and bolted to the protective sleeve cover plate 8 to complete the overall assembly of the fixture.

[0068] b) Connect the insulation testing device to the test circuit:

[0069] First, connect the basin-type insulator 1 of the test device to the high-voltage test equipment, connect the signal line 9 to the partial discharge detector, and finally reliably ground the housing 12 to carry out the insulation test. Specifically, the basin-type insulator 1 is connected to the high-voltage side mounting base 14, which is connected to one end of the insulating rod 3 via the high-voltage side adjusting plug 13. The other end of the insulating rod 3 is connected to the standard connector of the low-voltage side adjusting plug 5, which is connected to the signal line 9 of the sealed terminal plate 7 via the standard connector. The signal line 9 is then connected to the partial discharge detector, achieving overall electrical connection for the insulation test.

[0070] For example, such as Figure 3 As shown in Figures (a) and (b), this embodiment provides a high-voltage side adjustment plug 13 for use on the insulating rod of a disconnecting switch. This adjustment plug consists of a transition shaft 15, a spring retaining ring 16, and a bearing 17. During installation, the outer ring of the bearing 17 is first inserted into the high-voltage side mounting base 14 via an interference fit. Then, the transition shaft 15 is inserted into the inner ring of the bearing 17 via an interference fit. Subsequently, the spring retaining ring 16 is inserted into the retaining ring groove of the high-voltage side mounting base 14 to achieve axial limiting of the transition shaft 15. Finally, the insulating rod under test 3 is connected to the transition shaft 15 via a flat key. This ensures a stable connection between the high-voltage side mounting base 14 and the insulating rod under test 3 while maintaining a certain degree of freedom for the insulating rod under test 3 during installation. Manual adjustment can eliminate assembly and manufacturing errors, achieving stable and convenient installation of the insulating rod.

[0071] For the insulating rod 3 of different high-voltage switches, the adjusting plug can have various docking forms, all of which can be composed of moving parts, allowing for a certain degree of freedom during the installation of the insulating rod.

[0072] Therefore, this utility model provides an insulation testing device for high-voltage switch insulating rods, which has the following advantages compared to existing testing devices:

[0073] This test setup, through its innovative distributed architecture (including a low-voltage side connector with wires, an insulating mounting base, and a sealed terminal block), successfully and independently extracts signals from multiple insulating rods into the gas chamber, thereby effectively improving the overall performance and application efficiency of partial discharge detection. In terms of performance, the distributed architecture effectively diverts external noise current, and the insulating mounting base completely eliminates crosstalk between rods. Combined with the shielding effect of the protective sleeve against external electromagnetic interference, these three elements synergistically optimize signal quality, resulting in a significant improvement in the signal-to-noise ratio, sensitivity, and accuracy of partial discharge detection. Regarding efficiency, this architecture can extract signals from all insulating rods at once, supporting parallel and synchronous testing with a multi-channel partial discharge detector, eliminating the need to test each insulating rod individually, which greatly shortens the overall testing time. In terms of ease of operation, the replaceable adjustment plug design allows for rapid adaptation to different models of insulating rods, and the moving parts simplify the installation and adjustment process. For subsequent tests on similar insulating rods, typically only the insulating rod itself needs to be replaced by opening the cover, eliminating the need to repeatedly disassemble and reassemble the entire adjustment plug and shielding components, significantly improving testing efficiency. Furthermore, this testing device is highly economical. Its core components (plug, mounting base, terminal block, and sleeve) are simple and reliable in design, and manufacturing costs are controllable. Simultaneously, multi-channel parallel testing significantly reduces the average testing time for a single insulating rod, improving overall production efficiency. Finally, this device is extremely versatile. By changing the adjusting plug and shielding components, it can be adapted to insulating rods used in different models and types of high-voltage switches (such as circuit breakers and disconnectors). This not only expands the device's applicability but also facilitates standardized management and use of the testing process, reducing equipment maintenance and replacement costs.

[0074] The above embodiments are merely one of the implementation methods to achieve the technical solution of this utility model. The scope of protection claimed by this utility model is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model.

Claims

1. An insulation testing device for a high-voltage switch insulating rod, characterized in that, include: High-voltage side mounting bracket (14) and low-voltage side mounting bracket (10); The high-voltage side mounting base (14) is fixed to the high-voltage side of the housing (12) of the high-voltage switch; The low-voltage side mounting base (10) is fixed to the low-voltage side of the housing (12) of the high-voltage switch; The high-voltage side mounting base (14) is provided with multiple high-voltage side adjustment plugs (13) in the circumferential direction. The low-voltage side mounting base (10) is provided with a plurality of low-voltage side adjustment plugs (5) in the circumferential direction, and the number of low-voltage side adjustment plugs (5) corresponds to the number of high-voltage side adjustment plugs (13); The insulating rod (3) is inserted between a set of matching high-voltage side regulating plugs (13) and low-voltage side regulating plugs (5); One side of the high-voltage side mounting base (14) is provided with a high-voltage side shield (2), and the other side is connected to the basin insulator (1) of the housing (12). The low-pressure side mounting base (10) is provided with a low-pressure side shield (4) on one side and is connected to the sealing cover plate (11) of the housing (12) on the other side. Each insulating rod (3) passes through the low-voltage side shield (4) and is connected to the low-voltage side regulating plug (5); The sealing cover (11) is provided with a protective sleeve (6) on the outside; Each of the low-voltage side regulating plugs (5) is connected to a signal line (9), and each signal line (9) is led out from the protective sleeve (6).

2. The high-voltage switch insulating rod insulation test device according to claim 1, characterized in that, The high-voltage side mounting base (14) is connected to the basin insulator (1) of the housing (12) by bolts.

3. The high-voltage switch insulating rod insulation test device according to claim 1, characterized in that, The high-voltage side mounting base (14) has multiple high-voltage side through holes evenly opened around its circumference, and each high-voltage side adjustment plug (13) is inserted into each high-voltage side through hole by interference fit; the low-voltage side mounting base (10) has multiple low-voltage side through holes evenly opened around its circumference, and each low-voltage side adjustment plug (5) is fixed into each low-voltage side through hole by bolts.

4. The high-voltage switch insulating rod insulation test device according to claim 3, characterized in that, The high-voltage side regulating plug (13) includes a transition shaft (15), a spring retaining ring (16), and a bearing (17). The outer ring of the bearing (17) is clamped to the high-pressure side through hole of the high-pressure side mounting seat (14) by an interference fit; The transition shaft (15) is clamped to the inner ring of the bearing (17) by an interference fit; The spring retaining ring (16) is engaged in the retaining ring groove of the high-voltage side mounting base (14) to limit the axial displacement of the transition shaft (15).

5. The high-voltage switch insulating rod insulation test device according to claim 1, characterized in that, The insulating rod (3) is connected to the high-voltage side regulating plug (13) by a flat key; the insulating rod (3) is connected to the low-voltage side regulating plug (5) by a flat key.

6. The high-voltage switch insulating rod insulation test device according to claim 1, characterized in that, The protective sleeve (6) has a sealing terminal plate (7) fixed inside, and the sealing terminal plate (7) and the sealing cover plate (11) form a signal channel; the end of the low-voltage side adjustment plug (5) is integrated with a standard plug-in component that is plugged into the sealing terminal plate (7); the sealing terminal plate (7) is connected to the signal line (9) to realize the connection between the low-voltage side adjustment plug (5) and the signal line (9).

7. The high-voltage switch insulating rod insulation test device according to claim 1, characterized in that, The protective sleeve (6) has a cable channel at its bottom; the signal line (9) passes through the cable channel and is connected to the partial discharge detector.

8. The high-voltage switch insulating rod insulation test device according to claim 1, characterized in that, One end of the protective sleeve (6) is connected to the sealing cover plate (11), and the other end is connected to the protective sleeve cover plate (8).

9. The high-voltage switch insulating rod insulation test device according to claim 1, characterized in that, The low-voltage side shield (4) is fixed to the sealing cover plate (11) by bolts; the high-voltage side shield (2) is fixed to the basin insulator (1) by bolts.

10. The high-voltage switch insulating rod insulation test device according to claim 1, characterized in that, The low-voltage side mounting base (10) is made of insulating material to form a dielectric barrier; the dielectric barrier is used to isolate signal interference between multiple insulating rods (3).

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