Wiring terminal buckle for partial discharge experiment

Abstract

The invention discloses a wiring terminal buckle for a partial discharge experiment, and relates to the technical field of high voltage experiments, and the wiring terminal buckle comprises a bottom plate, the top surface of the bottom plate is provided with a capacitor, one side of the capacitor is provided with a low-voltage arm, the low-voltage arm is installed on the top surface of the bottom plate, the top of the capacitor is fixedly connected with a circular ring, and the side wall of the circular ring is detachably connected with a flexible conduit. The end, away from the circular ring, of the flexible conduit is fixedly connected with a buckle, a fastener is arranged on the buckle, the buckle is connected to a transformer connecting piece in a clamped mode, the transformer connecting piece is connected with an external voltage device, and the fastener makes contact with the transformer connecting piece. According to the invention, the capacitor, the low-voltage arm and the buckle structure are integrated to form a modular design, so that rapid mounting and dismounting are facilitated, and the mounting speed is increased; the direct clamping of the buckle and the transformer connecting piece is matched with the fastener, so that the stable electrical contact is ensured, the contact resistance is reduced, and the safety is improved.

Description

Technical Field

[0001] This invention relates to the field of high-voltage electrical experimental technology, and in particular to a terminal clip for partial discharge experiments. Background Technology

[0002] Partial discharge testing is an experiment to detect localized discharge phenomena in an insulating medium under the influence of a high electric field. This discharge phenomenon does not penetrate the entire insulating medium, but only occurs in certain areas, and may potentially damage the long-term stability of the equipment's insulation performance. Partial discharge testing evaluates discharge characteristics by measuring the weak electrical signals or accompanying phenomena generated during the discharge process.

[0003] In existing experimental equipment, the connection to the transformer is usually made of metal plates and bolts, which is cumbersome to install and prone to corona discharge, affecting the experimental results. Furthermore, the connection to the capacitor is not secure enough, cannot be disassembled, and is inconvenient to maintain.

[0004] Therefore, there is an urgent need for a terminal clip for partial discharge experiments to solve the problems existing in the above-mentioned prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a terminal clip for partial discharge experiments to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a terminal clip for partial discharge experiments, including a base plate, a capacitor mounted on the top surface of the base plate, a low-voltage arm provided on one side of the capacitor, the low-voltage arm being mounted on the top surface of the base plate, a ring fixedly connected to the top of the capacitor, a flexible tube detachably connected to the side wall of the ring, a clip fixedly connected to the end of the flexible tube away from the ring, a fastener provided on the clip, the clip engaging with a transformer connecting piece, the transformer connecting piece being connected to an external voltage transformer, and the fastener contacting the transformer connecting piece.

[0007] Optionally, the buckle includes a front plate, one end of a middle plate is fixedly connected to the top of the front plate, a rear plate is fixedly connected to the other end of the middle plate, the fastener is installed on the rear plate, and the rear plate is connected to the snakeskin tube.

[0008] Optionally, the two ends of the intermediate plate are provided with arcs.

[0009] Optionally, the fastener includes a lead screw that passes through the rear plate and is threaded to the rear plate, with a washer fixedly connected to one end of the lead screw, the washer contacting the transformer connecting piece, and an insulating head fixedly connected to the other end of the lead screw.

[0010] Optionally, a diagonal rod is fixedly connected to the bottom of the rear plate, and a connecting rod is fixedly connected to the bottom of the diagonal rod, with the bottom of the connecting rod fixedly connected to the snakeskin tube.

[0011] Optionally, a connector is fixedly connected to the side wall of the annulus, a ball is fixedly connected to the end of the connector, a connector is provided on the outside of the ball, a connecting block is fixedly connected to one side of the connector, and the connecting block is fixedly connected to the snakeskin tube.

[0012] Optionally, the connector includes a plurality of springs arranged circumferentially along the connecting block. One end of each spring is fixedly connected to the connecting block, and the other end of each spring is fixedly connected to an arc-shaped piece. The end of the arc-shaped piece away from the spring is fixedly connected to a connecting piece. The arc-shaped piece is adapted to the outer wall of the sphere, and the connecting piece contacts the outer wall of the connector.

[0013] Optionally, a nut is fitted on the outer side of the connector, and an external thread is provided on the side of the connecting piece away from the connector, the external thread being adapted to the nut.

[0014] Optionally, casters are installed at the four corners of the bottom surface of the base plate.

[0015] Optionally, a handrail is fixedly connected to one side of the base plate, and the handrail is U-shaped.

[0016] This invention discloses the following technical advantages: In use, one end of the flexible hose is quickly connected to the circular ring, and the other end's clip is engaged with the transformer connecting plate and secured with fasteners to prevent loosening during experiments. Experiments can be conducted immediately after connection, significantly improving installation speed and offering greater safety and reliability compared to bolt connections. This invention integrates a capacitor, low-voltage arm, and clip structure into a modular design, facilitating rapid installation and disassembly, thus increasing installation speed. The direct engagement of the clip with the transformer connecting plate, combined with fasteners, ensures stable electrical contact, reduces contact resistance, and improves safety. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure on the other side of the present invention;

[0020] Figure 3 For the present invention Figure 2 A magnified view of part A in the image;

[0021] Figure 4 This is a schematic diagram of the connection structure between the snakeskin tube and the ring of the present invention;

[0022] In the diagram: 1. Base plate; 2. Capacitor; 3. Snake-skin tubing; 4. Transformer connecting plate; 5. Front plate; 6. Ring; 7. Handrail; 8. Caster wheel; 9. Low-voltage arm; 10. Connecting rod; 11. Gasket; 12. Rear plate; 13. Middle plate; 14. Arc; 15. Connecting block; 16. Spring; 17. Arc-shaped piece; 18. Connecting piece; 19. External thread; 20. Sphere; 21. Connector; 22. Nut; 23. Lead screw; 24. Insulating head; 25. Diagonal rod. Detailed Implementation

[0023] The prior art discloses a partial discharge experimental connecting bolt structure, including a connecting bolt post and a corona shielding head. The surface of the corona shielding head is hemispherical. By setting the hemispherical shape of the corona shielding head, the corona phenomenon on the edge of the standard bolt head is avoided. The surface of the connecting bolt post is provided with connecting threads, and a second fastening nut is threaded onto the surface of the connecting threads. The second fastening nut is located below the surface of the first fastening nut. The surface of the second fastening nut is arc-shaped. By setting the arc-shaped second fastening nut, the first fastening nut can be tightened more securely, preventing the first fastening nut from loosening. A connecting head is fixedly connected to the top of the connecting bolt post, and a first connecting hole is opened on the surface of the connecting head. A connecting hole is opened at the bottom of the corona shielding head. The corona shielding head has a second connecting hole and a first fastening hole on its surface. The first connecting hole is threaded to the second connecting hole by a left fixing bolt and a right fixing bolt, respectively. Both the left and right fixing bolts have fastening grooves on their surfaces. These grooves allow for tightening and loosening of the bolts using a screwdriver. A plug is slidably connected inside the fastening groove to effectively prevent corona discharge. The inner wall of the first fastening hole is arc-shaped. The second connecting hole communicates with the connecting groove, which is slidably connected to the surface of the connector. The depth of the connecting groove is equal to the height of the connector to prevent relative displacement between the groove and the connector, which could affect the experimental results. The connecting threads are threaded onto the surfaces of the copper busbar flexible connector, the connecting test piece, and the first fastening nut. The surface of the first fastening nut has a second fastening hole. The presence of both holes effectively enhances the tightening effect on the corona shield and the first fastening nut. A rod can be inserted into the first and second holes to tighten or loosen the corona shield and the first fastening nut, respectively. The first fastening nut is cylindrical; its arc shape effectively secures the copper busbar flexible connector and the connecting test piece, preventing them from loosening. To address the issue of experimental voltage variations affecting experimental results, the lower surface of the corona shielding head is fixedly connected to a first anti-slip protrusion. The surface of the first anti-slip protrusion is fixedly connected to the upper surface of the copper busbar flexible connection. The lower surface of the copper busbar flexible connection is fixedly connected to a second anti-slip protrusion. The lower surface of the second anti-slip protrusion is fixedly connected to the upper surface of the connected test piece. By setting the first and second anti-slip protrusions, the possibility of relative displacement and slippage between the copper busbar flexible connection and the connected test piece can be effectively reduced, increasing the contact area and making the experimental voltage more stable. This effectively solves the problems of corona phenomenon and experimental voltage of the test piece.Working Principle: During the experiment, the connector is inserted into the connecting groove. The left and right fixing bolts are threaded into the first and second connecting holes using a screwdriver. The plug slides into the fastening groove. The copper busbar flexible connector and the connecting test piece are threaded into the connecting thread. The first fastening nut is threaded onto the connecting thread. The copper busbar flexible connector and the connecting test piece are then rotated and tightened. The second fastening nut tightens the first fastening nut by rotating it. A rod is inserted into the first fastening hole to thread the connecting bolt post onto the experimental device. By using a hemispherical corona shielding head, corona discharge on the bolt head edges of the standard part is avoided. The first fastening nut is cylindrical; its arc shape secures the copper busbar flexible connector and the connecting test piece, preventing voltage changes that could affect the experimental results if the connector loosens. By setting the depth of the connecting groove to the height of the connector, relative displacement between the groove and the connector can be avoided, thus preventing any impact on the experimental results.

[0024] The prior art discloses a transformer partial discharge experimental simulation device, including a housing, an adjustment and detection mechanism, and a simulation component. The adjustment and detection mechanism is located on the top wall of the housing, and the simulation component is located on the rear wall of the housing. The adjustment and detection mechanism includes an insulating frame, metal electrodes, support rods, a placement frame, a rubber frame, a discharge simulator, a rubber sleeve, a grounding wire, a movable frame, a high-frequency current sensor, and a pull rod. The cylindrical insulating frame extends vertically from the top wall of the housing and slides within the housing. Metal electrodes are fitted inside the insulating frame. Four support rods are vertically arranged at the bottom of the housing, and the placement frame is fixed to the top of the four support rods. A rubber frame is attached to the inner wall of the placement frame. The discharge simulator is placed inside a rubber frame. A grounding wire is installed at the bottom of the simulator, extending from the bottom wall of the enclosure. A movable frame is slidably connected to the bottom wall of the enclosure. A high-frequency current sensor is installed on one end of the movable frame, and a pull rod is connected to the other end of the movable frame, extending from the side wall of the enclosure. The simulation components include an extension frame, an exhaust trough, a ventilation fan, a resistance wire, a fixed frame, and a heat inlet trough. The extension frame is fixedly connected to the rear wall of the enclosure, and an exhaust trough is provided on the rear wall of the enclosure. The extension frame is fixedly connected to the exhaust trough and extends out of the rear wall of the enclosure. The ventilation fan is installed inside the extension frame. The fixed frame is located on the inner wall of the enclosure, and a resistance wire is installed inside the fixed frame. A baffle is hinged to the front of the enclosure, and an insulated handle is provided on one side of the baffle. Fixed plates are fixedly connected to both the baffle and one side of the enclosure. The internal threads of the fixed plates are connected to a second threaded post, which closes the baffle through the threads. Tempered glass is installed inside the baffle. A rubber sleeve is fitted on the outer wall of the discharge simulator. The dustproof plate is fixedly connected to the extension frame. Multiple heat inlet holes are formed in the fixed frame. Vertical sliding grooves are formed on both sides of the box wall. Multiple threaded holes are formed along the height of one side of each sliding groove. The two sliding grooves are positioned opposite each other. Two sliding rods are fixedly connected to the outer wall of the insulating frame. Each sliding rod extends from a sliding groove, and a connecting plate is provided at the end of each sliding rod. Bolts pass through the connecting plate and the threaded holes to fix the position of the insulating frame. A stabilizing groove is formed on the bottom wall of the box. A stabilizing block is slidably connected inside the stabilizing groove and fixed to the bottom of the moving frame. Two threaded holes are formed opposite each other on the placement frame. A first threaded post is screwed into each threaded hole. An insulating pad is provided at the end of the first threaded post, and the insulating pad fits tightly against the rubber sleeve. The discharge simulator is clamped by the two first threaded posts.In use, the discharge simulator simulates the working state of a transformer. It is fitted with a rubber sleeve and placed in a rubber frame, with the grounding wire passing through the frame and grounded. Rotating the first threaded post causes the insulating pads to press against both sides of the discharge simulator, clamping it and preventing movement during the experiment. Pulling the sliding rod adjusts the height of the insulating frame and the metal electrode, ensuring the discharge end of the metal electrode contacts the discharge simulator. Then, the bolts are screwed into the threaded holes to fix the sliding rod. The position of the moving frame and the high-frequency current sensor is adjusted using the pull rod, ensuring they contact the grounding wire. During the experiment, the baffle is closed, and the first... Two threaded posts are screwed into the fixing plate to secure the baffle. The experimental situation inside the frame is observed through tempered glass. The metal electrodes are energized, allowing current to enter the discharge simulator and be transmitted to the grounding wire. The rubber frame, rubber sleeve, and insulating pad prevent current leakage, ensuring current transmission only through the grounding wire. A high-frequency current sensor detects the current signal transmitted on the grounding wire and transmits it to an external receiving device. Operators can record and observe the transmitted current signal to determine the impact of partial discharge on the discharge simulator. Stabilizing slots and blocks increase the stability of the high-frequency current sensor during movement. The simulation components include an extension frame, exhaust duct, ventilation fan, dustproof plate, resistance wire, fixing frame, and heat inlet slot. The extension frame is fixedly connected to one side of the frame, the exhaust duct is located inside the frame, the ventilation fan is located on one side of the extension frame, multiple dustproof plates are fixedly connected to one side of the extension frame, the resistance wire is located on the inner wall of the frame, the fixing frame is fixedly connected to the inner wall of the frame, and multiple heat inlet slots are located inside the fixing frame. During the partial discharge experiment, the ventilation fan is turned on to blow outside air into the frame through the dustproof plate and exhaust trough, allowing the discharge simulator to simulate the working environment of a transformer. When the resistance wire is energized, the dissipated heat enters the frame through the heat inlet trough at the fixed frame, and the partial discharge of the discharge simulator at high temperature is observed. The discharge simulator simulates the working state of a transformer. It is placed in a rubber frame, with the grounding wire passing through the frame and grounded. Rotating the first threaded column clamps the insulating pad discharge simulator. By pulling the slide rod, the height of the insulating frame and the metal electrode can be adjusted so that the discharge end of the metal electrode contacts the discharge simulator. The position of the moving frame and the high-frequency current sensor can be adjusted by the pull rod so that they contact the grounding wire. During the experiment, the baffle is closed, the metal electrode is energized, and the current enters the discharge simulator and is transmitted to the grounding wire. The high-frequency current sensor can detect the current signal transmitted on the grounding wire and transmit it to the external receiving equipment. The staff can determine the impact of partial discharge on the discharge simulator by recording and observing the transmitted current signal. The ventilation fan is turned on, and the outside air is blown into the frame through the dustproof plate and exhaust trough, allowing the discharge simulator to simulate the working environment of a transformer. The resistance wire is energized, and the dissipated heat enters the frame through the heat inlet trough at the fixed frame. The partial discharge of the discharge simulator at high temperature is observed.

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Reference Figures 1-4 As shown, this embodiment provides a terminal clip for partial discharge experiments, including a base plate 1, a capacitor 2 mounted on the top surface of the base plate 1, a low-voltage arm 9 on one side of the capacitor 2, the low-voltage arm 9 mounted on the top surface of the base plate 1, a ring 6 fixedly connected to the top of the capacitor 2, a flexible tube 3 detachably connected to the side wall of the ring 6, a clip fixedly connected to the end of the flexible tube 3 away from the ring 6, a fastener provided on the clip, the clip snapping onto a transformer connecting piece 4, the transformer connecting piece 4 being connected to an external voltage transformer, and the fastener contacting the transformer connecting piece 4.

[0028] In use, one end of the flexible hose 3 is quickly connected to the ring 6, and the other end is snapped onto the transformer connecting piece 4 and secured with fasteners to prevent loosening during the experiment. Once connected, the experiment can begin, significantly improving installation speed and offering greater safety and reliability compared to bolt connections. This invention integrates the capacitor 2, low-voltage arm 9, and snap-fit ​​structure into a modular design, facilitating quick installation and disassembly. The direct snap-fit ​​between the snap-fit ​​and the transformer connecting piece 4, along with the fasteners, ensures stable electrical contact, reduces contact resistance, and improves signal transmission quality.

[0029] Further refining the design, the clip includes a front plate 5, with one end of a middle plate 13 fixedly connected to the top of the front plate 5. The other end of the middle plate 13 is fixedly connected to a rear plate 12. Fasteners are installed on the rear plate 12, which is connected to the flexible conduit 3. The clip's split structure facilitates processing and assembly, and can adapt to transformer connecting pieces 4 of different thicknesses by adjusting the dimensions of each plate. The middle plate 13 serves as a transition connector, distributing the clamping force and preventing localized stress concentration that could lead to deformation or damage.

[0030] Further refining the design, the intermediate plate 13 is provided with arcs 14 at both ends. The arcs 14 at both ends of the intermediate plate 13 can adapt to the rounded corners or irregular edges of the transformer connecting piece 4, improve the compatibility and fit of the buckle, reduce poor contact caused by shape mismatch, and the arcs 14 can prevent corona from affecting the experimental results.

[0031] Further refining the design, the fastener includes a lead screw 23 that penetrates and is threadedly connected to the rear plate 12. One end of the lead screw 23 is fixedly connected to a washer 11, which contacts the transformer connecting piece 4. The other end of the lead screw 23 is fixedly connected to an insulating head 24. The threaded connection between the lead screw 23 and the rear plate 12 allows for precise adjustment of the tightening force, preventing excessive tightness that could deform the connecting piece 18 or excessive looseness that could lead to poor contact. The washer 11 distributes the pressure of the lead screw 23 on the transformer connecting piece 4, protecting the surface coating or insulation layer of the transformer connecting piece 4. The insulating head 24 prevents electric shock to operators and also prevents short circuits between the lead screw 23 and external metal components.

[0032] Further refining the design, a diagonal brace 25 is fixedly connected to the bottom of the rear plate 12, and a connecting rod 10 is fixedly connected to the bottom of the diagonal brace 25. The bottom of the connecting rod 10 is fixedly connected to the flexible conduit 3. The diagonal brace 25 and the connecting rod 10 form a triangular support structure, which enhances the mechanical strength of the connection between the rear plate 12 and the flexible conduit 3, preventing the flexible conduit 3 from breaking due to repeated bending or pulling. The diagonal brace 25 can buffer vibration or impact, reducing interference to the capacitor 2 and the low-voltage arm 9. At the same time, the setting of the diagonal brace 25 can increase the distance between the flexible conduit 3 and the transformer, reducing the occurrence of safety accidents.

[0033] Further refining the design, a connector 21 is fixedly connected to the side wall of the ring 6, and a ball 20 is fixedly connected to the end of the connector 21. A connector is provided on the outside of the ball 20, and a connecting block 15 is fixedly connected to one side of the connector. The connecting block 15 is fixedly connected to the snake-shaped tube 3. The snake-shaped tube and the ring 6 are connected by the connector, which facilitates quick installation and disassembly, facilitates maintenance, and provides a good fixing effect, making it less prone to horizontal rotation.

[0034] Further refining the design, the connector includes several springs 16 arranged circumferentially along the connecting block 15. One end of each spring 16 is fixedly connected to the connecting block 15, and the other end of each spring 16 is fixedly connected to an arc-shaped piece 17. A connecting piece 18 is fixedly connected to the end of the arc-shaped piece 17 away from the springs 16. The arc-shaped piece 17 fits the outer wall of the sphere 20, and the connecting piece 18 contacts the outer wall of the connector head 21. The connector composed of the springs 16 and the arc-shaped piece 17 can elastically wrap around the sphere 20, achieving stepless angle adjustment while maintaining stable rotational resistance. The arc-shaped piece 17 fits the outer wall of the sphere 20, ensuring a fixed position after rotation and preventing angular displacement due to gravity or vibration.

[0035] Further refining the design, a nut 22 is fitted onto the outer side of the connector 21, and an external thread 19 is provided on the side of the connecting piece 18 away from the connector 21. The external thread 19 is adapted to the nut 22. The nut 22 and the external thread 19 of the connecting piece 18 cooperate to lock the relative position of the connector and the ball 20, preventing angular changes due to loosening after long-term use. The threaded connection structure is simple and reliable, facilitating quick on-site adjustment and fixation.

[0036] Further refining the design, casters 8 are installed at each of the four corners of the bottom surface of the base plate 1. The casters 8 allow the entire device to move freely, facilitating rapid transfer between different testing positions and reducing the labor intensity of manual handling. The base plate 1 bears weight evenly at its four corners, preventing excessive local pressure that could cause the equipment to tilt or be damaged.

[0037] Further refining the design, a handrail 7 is fixedly connected to one side of the base plate 1. The handrail 7 is U-shaped. The U-shaped handrail 7 provides an ergonomic operating handle, making it easy to push or move the device. The handrail 7 has high structural strength and can withstand the overall weight of the device, while avoiding occupying the top space of the base plate 1 and not affecting the layout of other components.

[0038] The beneficial effects of this invention are:

[0039] This invention, through modular design, flexible connection, adjustable fasteners, and movable structure, enables rapid installation, stable contact, multi-angle adaptation, and convenient movement of terminals in partial discharge experiments, significantly improving experimental efficiency and safety.

[0040] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to 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 of this invention.

[0041] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A terminal clip for partial discharge experiments, characterized in that: Includes a base plate (1), on the top surface of which a capacitor (2) is mounted, and a low-voltage arm (9) is provided on one side of the capacitor (2). The low-voltage arm (9) is mounted on the top surface of the base plate (1). A ring (6) is fixedly connected to the top of the capacitor (2). A snake-skin tube (3) is detachably connected to the side wall of the ring (6). A buckle is fixedly connected to the end of the snake-skin tube (3) away from the ring (6). A fastener is provided on the buckle. The buckle is snapped onto the transformer connecting piece (4). The transformer connecting piece (4) is connected to an external voltage transformer. The fastener is in contact with the transformer connecting piece (4).

2. The terminal clip for partial discharge experiments according to claim 1, characterized in that: The buckle includes a front plate (5), one end of a middle plate (13) is fixedly connected to the top of the front plate (5), and a rear plate (12) is fixedly connected to the other end of the middle plate (13). The fastener is installed on the rear plate (12), and the rear plate (12) is connected to the snakeskin tube (3).

3. The terminal clip for partial discharge experiments according to claim 2, characterized in that: The intermediate plate (13) has arcs (14) at both ends.

4. The terminal clip for partial discharge experiments according to claim 2, characterized in that: The fastener includes a lead screw (23) that passes through the rear plate (12) and is threaded to the rear plate (12). One end of the lead screw (23) is fixedly connected to a washer (11), which contacts the transformer connecting piece (4). The other end of the lead screw (23) is fixedly connected to an insulating head (24).

5. The terminal clip for partial discharge experiments according to claim 2, characterized in that: The bottom of the rear plate (12) is fixedly connected to a diagonal rod (25), and the bottom of the diagonal rod (25) is fixedly connected to a connecting rod (10). The bottom of the connecting rod (10) is fixedly connected to the snakeskin tube (3).

6. The terminal clip for partial discharge experiments according to claim 1, characterized in that: A connector (21) is fixedly connected to the side wall of the ring (6), and a ball (20) is fixedly connected to the end of the connector (21). A connector is provided on the outside of the ball (20), and a connecting block (15) is fixedly connected to one side of the connector. The connecting block (15) is fixedly connected to the snakeskin tube (3).

7. The terminal clip for partial discharge experiments according to claim 6, characterized in that: The connector includes a plurality of springs (16) arranged circumferentially along the connecting block (15). One end of the spring (16) is fixedly connected to the connecting block (15), and the other end of the spring (16) is fixedly connected to an arc-shaped piece (17). The end of the arc-shaped piece (17) away from the spring (16) is fixedly connected to a connecting piece (18). The arc-shaped piece (17) is adapted to the outer wall of the sphere (20), and the connecting piece (18) contacts the outer wall of the connector (21).

8. The terminal clip for partial discharge experiments according to claim 7, characterized in that: The connector (21) is fitted with a nut (22) on its outer side, and the connecting piece (18) is provided with an external thread (19) on the side away from the connector (21), and the external thread (19) is adapted to the nut (22).

9. The terminal clip for partial discharge experiments according to claim 1, characterized in that: The base plate (1) has casters (8) installed at the four corners of its bottom surface.

10. The terminal clip for partial discharge experiments according to claim 1, characterized in that: A handrail (7) is fixedly connected to one side of the base plate (1), and the handrail (7) is U-shaped.

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