Pole-mounted switch partial discharge performance testing device

Abstract

The invention discloses a pole-mounted switch partial discharge performance testing device, and relates to the technical field of pole-mounted switch testing, and the device comprises an isolation sleeve which is driven by an electric push rod to move towards an electrode plate of a pole-mounted switch, is disposed on the electrode plate in a sleeving manner, and is in plugging cooperation with a slot where the electrode plate is located, so as to form a sealed testing cavity isolated from the outside; the dull polish assembly is arranged at the sleeve opening of the isolation sleeve and comprises a dull polish disc which is rotationally arranged, and the grinding width of the dull polish disc covers the width of the electrode plate; and the rotor blades are uniformly distributed on the rotating shaft of the grinding disc in the circumferential direction. According to the invention, through the arrangement of the frosted assembly, the elastic telescopic pipe and the electric connection assembly, the electrode plate is automatically cleaned before connection and then is automatically connected, so that poor contact caused by dust on the surface of the electrode plate during connection is effectively avoided, and the safety and stability during testing are further improved; therefore, the accuracy of test results is improved.

Description

Technical Field

[0001] This invention relates to the field of pole-mounted switch testing technology, specifically to a pole-mounted switch partial discharge performance testing device. Background Technology

[0002] Pole-mounted switches are switching devices installed on utility poles to control the connection and disconnection of power grid lines. Because pole-mounted switches are directly exposed to the high-altitude environment, they require regular partial discharge testing to ensure the insulation safety of the distribution network and prevent equipment failure. Due to their location in a high-voltage environment, partial discharge performance testing requires maintenance personnel to climb and manually connect the test lines, which carries a high risk. With technological advancements, automated climbing devices have been installed to automate the connection process, ensuring the safety of maintenance personnel and reducing their workload.

[0003] However, since the electrode plates of the pole-mounted switch are external, and the electrode plates are exposed to the environment for a long time, dust and some solid impurities are easily accumulated on their surface, which causes contamination and oxidation of the electrode plate surface. This can easily lead to poor contact during electrical connection, thus affecting the accuracy of the test results. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a device for testing the partial discharge performance of pole-mounted switches.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A partial discharge performance testing device for a pole-mounted switch includes:

[0007] An isolation sleeve, driven by an electric push rod, moves toward the electrode plate of the column switch and is fitted onto the electrode plate and inserted into the slot where the electrode plate is located to form a sealed test chamber isolated from the outside.

[0008] A frosted assembly disposed at the opening of the isolation sleeve includes:

[0009] The rotating abrasive disc has a grinding width that covers the width of the electrode plate;

[0010] Rotor blades are evenly distributed circumferentially on the rotating shaft of the grinding disc;

[0011] The spherical shell fitted outside the rotor blades is inclined toward the surface of the electrode plate when the airflow direction is toward the outlet airflow. When the airflow enters the spherical shell, it pushes the rotor blades to drive the grinding disc to rotate.

[0012] An electrical connection assembly symmetrically arranged within a sealed test chamber includes:

[0013] The telescopic airbag and the electrode plate fixed to the telescopic end of the telescopic airbag, wherein the telescopic airbag is inflated and elongated to drive the electrode plate to fit together with the electrode plate.

[0014] An elastic telescopic tube, which extends and retracts within the isolation sleeve along the central axis, is connected to the spherical shell and the telescopic airbag, respectively.

[0015] As the isolation sleeve moves toward the electrode plate, it first compresses the elastic telescopic tube, forcing airflow into the spherical shell. When the isolation sleeve moves to the preset position, it triggers the reversing component to switch the air path, so that the elastic telescopic tube connects with the telescopic airbag to inflate the inside of the telescopic airbag.

[0016] Preferably, the elastic telescopic tube and the spherical shell are connected by an acceleration tube, which is a tapering pipe along the airflow direction.

[0017] Preferably, a compressed air box is symmetrically arranged inside the isolation sleeve. A suction hood is provided on the side of the compressed air box near the electrode plate, and an exhaust channel is opened on the other side of the box wall. A one-way valve is provided at the air inlet of the suction hood and in the exhaust channel.

[0018] Preferably, a reciprocating plate is movably disposed inside the compressed air box, and the reciprocating plate moves back and forth to adjust the air pressure inside the compressed air box to increase or decrease.

[0019] Preferably, the reciprocating plate moves away from the elastic telescopic tube, and the air pressure inside the compressed air box is in a negative pressure state. Air is drawn inward through the suction hood, and the gas containing dust is drawn into the compressed air box.

[0020] Preferably, the reciprocating plate moves toward the elastic telescopic tube, compressing the air pressure inside the compressed air box. The one-way valve at the air inlet of the suction hood allows air to enter but not exit. The dusty gas that enters the compressed air box is discharged from the sealed test chamber through the exhaust channel.

[0021] Preferably, reciprocating wheels are rotatably arranged on the spherical shells on both sides of the abrasive assembly, and the reciprocating wheels are arranged in a position corresponding to the compressed air box.

[0022] Preferably, a fixing rod is fixedly provided on the reciprocating plate, and a hinge rod is hinged between one end of the fixing rod and the edge of the reciprocating wheel.

[0023] Preferably, the reversing assembly includes a reversing plate and a trigger plate that is drivenly connected to the reversing plate. The reversing plate has a through hole, and the through hole in the initial state of the reversing plate is connected to the air passage between the spherical shell and the elastic telescopic tube.

[0024] Preferably, when the movable end of the elastic telescopic tube moves relative to the isolation sleeve to a preset position, the movable end of the elastic telescopic tube pushes against the trigger plate to drive the reversing plate to move, so that the through hole is connected to the air passage between the telescopic airbag and the elastic telescopic tube.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] This invention, through the provision of a frosting assembly, an elastic telescopic tube, and an electrical connection assembly, allows the isolation sleeve to move to the electrode plate position, causing the electrode plate to move relative to the isolation sleeve. During this process, before the electrode plate enters the isolation sleeve, its end contacts a contact plate fixedly installed at the moving end of the elastic telescopic tube, pushing against the contact plate and moving synchronously. This causes the elastic telescopic tube to elastically compress and deform, thereby adjusting the air pressure inside the elastic telescopic tube. A first air passage connecting the elastic telescopic tube and the spherical shell pumps the gas from the elastic telescopic tube into the spherical shell. The airflow entering the spherical shell drives the rotor blades inside to rotate, thereby rotating the shaft and causing the frosting disc located at the opening of the isolation sleeve to rotate. When the electrode plate moves relative to the isolation sleeve, the rotating frosting disc polishes the surface of the electrode plate, removing the oxide layer, dust, and some solid impurities. The airflow entering the spherical shell enters the confluence cavity opened in the isolation sleeve wall through a second air passage, and is then guided by a third air passage and ejected towards the flat slit on the surface of the electrode plate through the third air passage. The slit-shaped air outlet forms an inclined air curtain that blows air onto the surface of the electrode plate, thus blowing dust from the polished electrode plate surface toward the isolation sleeve opening for discharge. This achieves automatic cleaning of the electrode plate surface during the automatic insertion process. When the electrode plate moves relative to the contact plate to a preset position, the reversing component is triggered to close the first air passage connecting the elastic telescopic tube and the spherical shell, and switch the air passage to open the fourth air passage connecting the elastic telescopic tube and the telescopic air bladder. This allows air to be injected into the telescopic air bladder through the fourth air passage, causing the telescopic air bladder to inflate and deform, thereby driving the electrode sheet to adhere to the electrode plate and achieve electrical connection. This enables the connection between the test control device and the high-voltage end of the column switch. Thus, the electrode plate is automatically cleaned before connection, effectively avoiding poor contact caused by dust on the electrode plate surface during electrical connection, further improving the safety and stability of the test, and further improving the accuracy of the test results. Moreover, no additional drive source is needed to drive the grinding disc to rotate, further simplifying the structure and saving manufacturing costs. Attached Figure Description

[0027] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0028] Figure 1 This is a top-view three-dimensional structural diagram of the device of the present invention after it has been positioned and fixed.

[0029] Figure 2 This is a bottom-view three-dimensional structural diagram of the device of the present invention after it has been positioned and fixed.

[0030] Figure 3 This is a top-view three-dimensional structural diagram of the present invention;

[0031] Figure 4 This is a bottom-view three-dimensional structural diagram of the present invention;

[0032] Figure 5 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0033] Figure 6 For the present invention Figure 5 Enlarged view of point A;

[0034] Figure 7 For the present invention Figure 6 Enlarged view of point B;

[0035] Figure 8 For the present invention Figure 6 Enlarged view of point C;

[0036] Figure 9 This is a schematic diagram of the cross-sectional structure of the present invention;

[0037] Figure 10 For the present invention Figure 9 Enlarged diagram of point D;

[0038] Figure 11 For the present invention Figure 10 Enlarged diagram of point E.

[0039] The diagram shows the following components: 1. Climbing column ring; 2. Positioning frame; 3. Moving plate; 4. Isolation sleeve; 5. Elastic plate; 6. Reciprocating wheel; 7. Support rod; 8. Manifold; 9. Acceleration tube; 10. Telescopic airbag; 11. Electrode plate; 12. Connecting plate; 13. Reversing plate; 14. Elastic telescopic tube; 15. Trigger plate; 16. Contact plate; 17. Trigger rod; 18. Frosting disc; 19. Spherical shell; 20. Rotor blade; 21. Compressed air box; 22. Intake hood; 23. Reciprocating plate; 24. Fixing rod; 25. Hinge rod; 26. Exhaust channel. Detailed Implementation

[0040] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0041] like Figure 1-11 As shown, a partial discharge performance testing device for a pole-mounted switch includes:

[0042] The isolation sleeve 4 is driven by the electric push rod to move towards the electrode plate of the column switch, and is sleeved on the electrode plate and inserted into the slot where the electrode plate is located to form a sealed test cavity isolated from the outside.

[0043] A frosted assembly installed at the four openings of the isolation sleeve includes:

[0044] The rotating abrasive disc 18 has a grinding width that covers the width of the electrode plate.

[0045] Rotor blades 20 are circumferentially distributed on the rotating shaft of the grinding disc 18;

[0046] The spherical shell 19, which is fitted outside the rotor blades 20, is inclined toward the surface of the electrode plate when the airflow direction is directed toward the surface of the electrode plate. When the airflow enters the spherical shell 19, it pushes the rotor blades 20 to drive the grinding disc 18 to rotate.

[0047] An electrical connection assembly symmetrically arranged within a sealed test chamber includes:

[0048] The telescopic airbag 10 and the electrode plate 11 fixed to the telescopic end of the telescopic airbag 10 are included. The telescopic airbag 10 is inflated and elongated to deform, so as to drive the electrode plate 11 to fit into the electrode plate.

[0049] An elastic telescopic tube 14, which is installed in the isolation sleeve 4 along the central axis, is connected to the spherical shell 19 and the telescopic airbag 10 respectively.

[0050] As the isolation sleeve 4 moves toward the electrode plate, it first compresses the elastic telescopic tube 14, forcing the airflow into the spherical shell 19. When the isolation sleeve 4 moves to the preset position, it triggers the reversing component to switch the air path, so that the elastic telescopic tube 14 is connected to the telescopic airbag 10 to inflate the telescopic airbag 10.

[0051] Specifically, partial discharge is an early signal of the deterioration of the insulation material of equipment. Although the discharge amount is small, it will continue to accelerate the insulation damage, which may eventually lead to switch breakdown, tripping, or even power outages in the distribution network. Therefore, after the pole-mounted switch is put into use, it is necessary to conduct regular partial discharge performance tests to ensure the insulation safety of the distribution network and prevent equipment failures. However, since the pole-mounted switch is located in a high-altitude and high-voltage environment, maintenance personnel need to climb to make electrical connections to the test equipment during partial discharge testing, which cannot guarantee the absolute safety of maintenance personnel. Moreover, the existing devices generally achieve electrical connections by clamping the electrode plates with electrode clips, which are prone to falling under external force and shaking due to the influence of the external environment, resulting in unstable connections and affecting the accuracy of the test results. The climbing ring 1, secured to the column by two semi-circular clamps and bolts, allows the climbing wheels, arranged in an array and protruding from the inner ring wall, to fit against the column surface. The climbing ring 1's built-in drive source propels the climbing wheels, moving the entire device along the column towards the column-mounted switch. Before upward movement, the positioning frame 2, rotating at the top of the climbing ring 1, is initially aligned with the bottom of the control box of the column-mounted switch, ensuring the control box's projection falls within the positioning frame 2. The climbing wheels then drive the positioning frame 2 upward. When the positioning frame 2 reaches the bottom of the control box, the bottom sides of the control box first contact the elastic plates 5 elastically arranged on the inner walls of the positioning frame 2. The elastic plates 5 include inclined and vertical portions; the bottom sides of the control box first contact the inclined portions. As the positioning frame 2 continues upward, the bottom of the control box moves along the elastic plates 5... The inclined parts slide relative to each other, and at the same time, an outward squeezing force is generated on the inclined parts. Because the elastic sheet 5 is elastic, the inclined parts will deform slightly outward, and the reaction force generated will push the control box towards the center of the positioning frame 2. Since the position of the control box is fixed, the positioning frame 2 will rotate relative to the control box, thereby realizing the automatic centering correction of the positioning frame 2 relative to the control box.

[0052] Furthermore, when the positioning frame 2 moves to the preset docking height, that is, when the inner wall of the bottom of the positioning frame 2 contacts the bottom of the control box, the control box completely disengages from the inclined part of the elastic sheet 5 and instead fits tightly against the vertical part of the elastic sheet 5. At this time, the elastic clamping force of the vertical part will clamp the control box from both sides, thereby further positioning and fixing the positioning frame 2, completing the precise docking of the control box and the positioning frame 2, so that the grounding wire set at the bottom of the positioning frame 2 contacts the bottom of the control box, thereby realizing the connection between the test control device and the grounding terminal of the pole switch. At the same time, the isolation sleeve 4 set on the positioning frame 2 corresponds to the slot position opened on the pole switch. By driving the electric push rod fixedly set on the positioning frame 2, the moving plate 3 fixedly set at the output end of the electric push rod moves towards the pole switch, thereby driving the support rod 7 arrayed on the moving plate 3 to move synchronously, thereby driving the fixed The isolation sleeve 4, installed at the top of the support rod 7, moves synchronously, thereby driving the isolation sleeve 4 to move towards the electrode plate of the pole-mounted switch. It is then fitted onto the electrode plate and inserted into the slot where the electrode plate is located to form a sealed test chamber isolated from the outside. This enables the electrical connection between the test control device and the high-voltage end of the pole-mounted switch. The pole-mounted switch is then partially discharged through the ground test control device, achieving automatic positioning and docking. This eliminates the need for maintenance personnel to perform high-altitude operations or manually connect the device, completely eliminating the dangers of high-altitude and high-voltage operations and effectively improving the safety performance of the device. Furthermore, the sealed test chamber formed by the insertion and cooperation of the isolation sleeve 4 and the slot effectively isolates the influence of the external environment, improves the stability of the connection, and thus improves the accuracy of the test results.

[0053] Furthermore, since the electrode plates of the pole-mounted switch are external, and due to long-term exposure to the environment, dust and solid impurities easily accumulate on their surface, leading to contamination and oxidation. This can cause poor contact during electrical connection, affecting the accuracy of test results. Through the frosted assembly, when the isolation sleeve 4 moves to the electrode plate position and the electrode plate moves relative to it within the isolation sleeve 4, the end of the electrode plate contacts the contact plate 16 fixedly installed at the moving end of the elastic telescopic tube 14 before entering the isolation sleeve 4, and pushes against the contact plate 16 to move synchronously. This causes the elastic telescopic tube 14 to elastically compress and deform, thereby adjusting the air pressure inside the elastic telescopic tube 14. The airflow is then pumped into the spherical shell 19 through the first air passage connecting the elastic telescopic tube 14 and the spherical shell 19. The airflow entering the spherical shell 19 pushes the rotor blades 20 installed within the spherical shell 19 to rotate, thereby rotating the shaft and driving the rotor blades 20 located within the isolation sleeve 19 to rotate. The abrasive disc 18 at the opening of the sleeve 4 rotates, so that when the electrode plate moves into the isolation sleeve 4, the abrasive disc 18 rotates to polish the surface of the electrode plate, thereby removing the oxide layer, dust and some solid impurities on the surface of the electrode plate. The airflow entering the spherical shell 19 enters the confluence cavity 8 opened in the sleeve wall of the isolation sleeve 4 through the second air passage and is drawn through the third air passage and sprayed out towards the flat air outlet slit on the surface of the electrode plate. The flat air outlet slit forms an inclined air curtain that blows the surface of the electrode plate, thereby blowing the dust on the polished surface of the electrode plate toward the opening of the isolation sleeve 4 for discharge. In this way, the surface of the electrode plate is automatically cleaned during the automatic insertion process.

[0054] Furthermore, when the electrode plate moves relative to the contact plate 16 to a preset position, the reversing component is triggered to close the first air passage connecting the elastic telescopic tube 14 and the spherical shell 19, and switch the air passage to open the fourth air passage connecting the elastic telescopic tube 14 and the telescopic airbag 10. This allows air to be pumped into the telescopic airbag 10 through the fourth air passage, causing the telescopic airbag 10 to inflate and deform, thereby driving the electrode sheet 11 to fit against the electrode plate to achieve electrical connection. This enables the connection between the test control device and the high-voltage end of the column switch. This allows for automatic cleaning of the electrode plate before connection, effectively preventing dust on the electrode plate surface from causing poor contact during electrical connection, further improving the safety and stability of the test, and further improving the accuracy of the test results. Moreover, it eliminates the need for an additional drive source to drive the grinding disc 18 to rotate, further simplifying the structure and saving manufacturing costs.

[0055] The elastic telescopic tube 14 and the spherical shell 19 are connected by an acceleration tube 9, which is a tapering tube along the airflow direction.

[0056] Specifically, the first air path includes an acceleration tube 9, whose cross-sectional area gradually decreases from the air inlet to the air outlet, following the principle that the flow velocity is small where the cross-section is large and large where the cross-section is small. The elastic telescopic tube 14 compresses and adjusts the internal air pressure to increase the pressure, and enters the acceleration tube 9. After being accelerated by the acceleration tube 9, a high-speed and stable airflow is formed, thereby driving the rotor blades 20 to rotate stably, thereby driving the grinding disc 18 to stably grind the surface of the electrode plate.

[0057] A compressed air box 21 is symmetrically arranged inside the isolation sleeve 4. A suction hood 22 is provided on the side of the compressed air box 21 near the electrode plate, and an exhaust channel 26 is provided on the other side of the box wall. A one-way valve is provided at the air inlet of the suction hood 22 and in the exhaust channel 26.

[0058] Specifically, the compressed air box 21 is set on both sides of the electrode plate, the air intake of the suction hood 22 faces the electrode plate, and the one-way valve is a duckbill valve. The one-way valve set at the air intake of the suction hood 22 only allows airflow to enter the compressed air box 21 through the air intake of the suction hood 22, and does not allow airflow to be discharged into the isolation sleeve 4 through the air intake of the suction hood 22. The one-way valve set on the exhaust channel 26 only allows the gas in the compressed air box 21 to be discharged through the exhaust channel 26, and does not allow air outside the isolation sleeve 4 to enter the compressed air box 21 through the exhaust channel 26.

[0059] A reciprocating plate 23 is installed inside the compressed air box 21. The reciprocating plate 23 moves back and forth to adjust the air pressure inside the compressed air box 21 to increase or decrease.

[0060] Specifically, the reciprocating plate 23 divides the internal cavity of the compressed air box 21. The reciprocating plate 23 moves back and forth in the compressed air box 21 and adjusts the air pressure inside the first cavity located on the side of the reciprocating plate 23 near the elastic telescopic tube 14.

[0061] The reciprocating plate 23 moves away from the elastic telescopic tube 14, and the air pressure inside the compressed air box 21 is in a negative pressure state. Air is drawn in through the suction hood 22, and the gas containing dust is drawn into the compressed air box 21.

[0062] Specifically, when the reciprocating plate 23 moves away from the elastic telescopic tube 14, the volume of the first cavity increases, and the inside is in a negative pressure state. Thus, the gas containing dust in the isolation sleeve 4 is drawn into the first cavity and accumulated through the suction hood 22. After the isolation sleeve 4 is inserted into the slot, a test sealed cavity is formed inside. The gas containing dust cannot be discharged through the isolation sleeve 4. The gas containing dust in the sealed test cavity is drawn into the first cavity and accumulated through the suction hood 22. Before the sealed test cavity is formed, the isolation sleeve 4 can effectively discharge more dust into the isolation sleeve 4, thereby avoiding the connection between the electrode plate and the electrode sheet 11 caused by the dust remaining in the isolation sleeve 4, further avoiding poor contact caused by dust, and thus improving the accuracy of the measurement results.

[0063] The reciprocating plate 23 moves toward the elastic telescopic tube 14, compressing the air pressure inside the compressed air box 21. The one-way valve at the air inlet of the suction hood 22 allows air to enter but not exit. The dusty gas that enters the compressed air box 21 is discharged from the sealed test chamber through the exhaust channel 26.

[0064] Specifically, when the reciprocating plate 23 moves toward the elastic telescopic tube 14, the volume of the first cavity decreases and the internal air pressure is compressed, thereby expelling the dust accumulated in the first cavity along with the airflow through the exhaust channel 26, thus cleaning the dust in the sealed test cavity.

[0065] The two spherical shells 19 on both sides of the abrasive assembly are equipped with reciprocating wheels 6, which are positioned corresponding to the compressed air box 21.

[0066] A fixing rod 24 is fixedly installed on the reciprocating plate 23, and a hinge rod 25 is hinged between one end of the fixing rod 24 and the edge of the reciprocating wheel 6.

[0067] Specifically, during the compression process of the elastic telescopic tube 14, before the reversing component is triggered, the gas inside the elastic telescopic tube 14 is accelerated into the spherical shell 19 through the acceleration tube 9, driving the reciprocating wheel 6 to rotate synchronously. This causes the fixed rod 24 to be pulled by the hinge rod 25, which in turn drives the reciprocating plate 23 to move back and forth inside the compressed air box 21. This eliminates the need for an additional drive source to drive the reciprocating plate 23 to move back and forth, further simplifying the structure and saving manufacturing costs.

[0068] The reversing assembly includes a reversing plate 13 and a trigger plate 15 that is drivenly connected to the reversing plate 13. The reversing plate 13 has a through hole, and the through hole of the reversing plate 13 in the initial state is connected to the air passage between the spherical shell 19 and the elastic telescopic tube 14.

[0069] When the movable end of the elastic telescopic tube 14 moves relative to the isolation sleeve 4 to the preset position, the movable end of the elastic telescopic tube 14 pushes against the trigger plate 15 to drive the reversing plate 13 to move, so that the through hole is connected to the air passage between the telescopic airbag 10 and the elastic telescopic tube 14.

[0070] Specifically, when the moving end of the elastic telescopic tube 14 moves relative to the isolation sleeve 4 to a preset position, the trigger rod 17 fixedly installed on the contact plate 16 at the moving end of the elastic telescopic tube 14 contacts the trigger plate 15. As the isolation sleeve 4 moves, the electrode plate continues to push the contact plate 16 to move, thereby causing the trigger rod 17 to push the trigger plate 15 to elastically compress the second spring. This causes the connecting plate 12 to move synchronously through the connecting rod fixedly installed on the trigger plate 15, thereby causing the through hole opened on the connecting plate 12 to be misaligned with the first air passage, so as to block the first air passage and connect the through hole located in the middle with the second air passage. This allows the telescopic airbag 10 and the elastic telescopic tube 14 to be connected, so that the telescopic airbag 10 extends and deforms, causing the electrode plate 11 to contact and connect with the electrode plate.

[0071] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A partial discharge performance testing device for pole-mounted switches, characterized by, include: include: An isolation sleeve, driven by an electric push rod, moves toward the electrode plate of the column switch and is fitted onto the electrode plate and inserted into the slot where the electrode plate is located to form a sealed test chamber isolated from the outside. A frosted assembly disposed at the opening of the isolation sleeve includes: The rotating abrasive disc has a grinding width that covers the width of the electrode plate; Rotor blades are evenly distributed circumferentially on the rotating shaft of the grinding disc; The spherical shell fitted outside the rotor blades is inclined toward the surface of the electrode plate when the airflow direction is toward the outlet airflow. When the airflow enters the spherical shell, it pushes the rotor blades to drive the grinding disc to rotate. An electrical connection assembly symmetrically arranged within a sealed test chamber includes: The telescopic airbag and the electrode plate fixed to the telescopic end of the telescopic airbag, wherein the telescopic airbag is inflated and elongated to drive the electrode plate to fit together with the electrode plate. An elastic telescopic tube, which extends and retracts within the isolation sleeve along the central axis, is connected to the spherical shell and the telescopic airbag, respectively. As the isolation sleeve moves toward the electrode plate, it first compresses the elastic telescopic tube, forcing airflow into the spherical shell. When the isolation sleeve moves to the preset position, it triggers the reversing component to switch the air path, so that the elastic telescopic tube connects with the telescopic airbag to inflate the inside of the telescopic airbag.

2. The partial discharge performance test device for pole-mounted switch according to claim 1, characterized in that: The elastic telescopic tube and the spherical shell are connected by an acceleration tube, which is a tapering pipe along the airflow direction.

3. The partial discharge performance test device for pole-mounted switch according to claim 1, characterized in that: The isolation sleeve is symmetrically equipped with compressed air boxes. The compressed air box is equipped with an air intake hood on the side near the electrode plate, and an exhaust channel is opened on the other side of the box wall. One-way valves are provided at the air inlet of the air intake hood and in the exhaust channel.

4. The partial discharge performance test device for pole-mounted switch according to claim 3, characterized in that: A reciprocating plate is movable inside the compressed air box, and the reciprocating plate moves back and forth to adjust the air pressure inside the compressed air box to increase or decrease.

5. The partial discharge performance test device for pole-mounted switch according to claim 4, characterized in that: The reciprocating plate moves away from the elastic telescopic tube, and the air pressure inside the compressed air box is in a negative pressure state. Air is drawn in through the suction hood, and the gas containing dust is drawn into the compressed air box.

6. The partial discharge performance test device for pole-mounted switch according to claim 5, characterized in that: The reciprocating plate moves toward the elastic telescopic tube, compressing the air pressure inside the compressed air box. The one-way valve at the air inlet of the suction hood allows air to enter but not exit. The dusty gas that enters the compressed air box is discharged from the sealed test chamber through the exhaust channel.

7. The partial discharge performance test device for pole-mounted switch according to claim 6, characterized in that: The two spherical shells on both sides of the abrasive assembly are equipped with reciprocating wheels that are rotatably arranged, and the reciprocating wheels are positioned corresponding to the compressed air box.

8. The partial discharge performance test device for pole-mounted switch according to claim 7, characterized in that: A fixing rod is fixedly installed on the reciprocating plate, and a hinge rod is hinged between one end of the fixing rod and the edge of the reciprocating wheel.

9. The partial discharge performance test device for pole-mounted switch according to claim 4, characterized in that: The reversing assembly includes a reversing plate and a trigger plate that is drivenly connected to the reversing plate. The reversing plate has a through hole, and the through hole in the initial state of the reversing plate is connected to the air passage between the spherical shell and the elastic telescopic tube.

10. The partial discharge performance test device for pole-mounted switch according to claim 9, characterized in that: When the movable end of the elastic telescopic tube moves relative to the isolation sleeve to a preset position, the movable end of the elastic telescopic tube pushes against the trigger plate to drive the reversing plate to move, so that the through hole is connected to the air passage between the telescopic airbag and the elastic telescopic tube.

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