A porcelain insulator insulation performance detection device and detection method

Abstract

This invention discloses a device and method for testing the insulation performance of porcelain insulators. The device includes an outer insulating shell forming a closed chamber and an oil immersion tank fixedly disposed inside the lower part of the outer insulating shell. The top of the outer insulating shell has a V-shaped opening. A lifting assembly is installed inside the outer insulating shell and located behind the oil immersion tank. A flip-type fixture is mounted on the drive end of the lifting assembly. A long-axis reversing driver is positioned above the oil immersion tank to drive the flip-type fixture to rotate the porcelain insulator around a horizontal axis, changing its orientation. This invention utilizes the lifting assembly to detach the flip-type fixture containing the porcelain insulator from the insulating oil. A pump assembly and a multi-pipe air blowing assembly use high-pressure airflow to gradually blow the insulating oil away from the insulator and electrode clamps. During the blowing process, the long-axis reversing driver causes the insulator to change its orientation, thereby compressing the natural oil draining time, which might otherwise take tens of minutes, and shortening the testing cycle for a single workpiece.

Description

Technical Field

[0001] This invention relates to the field of insulator breakdown voltage detection technology, specifically to a device and method for testing the insulation performance of porcelain insulators. Background Technology

[0002] The oil immersion breakdown voltage test of disc suspension porcelain insulators is a destructive test used to assess whether there are manufacturing defects (such as pores, cracks or impurities) inside. The principle is to completely immerse the test sample in insulating oil to isolate the air medium on the surface of the insulator, prevent surface flashover under high voltage, and thus force the current to pass through the inside of the insulator, so as to truly reflect its internal insulation strength. This test requires a power frequency high-voltage tester, an oil tank made of insulating material, insulating oil meeting specific breakdown voltage and resistivity requirements, and reliable high and low voltage test conductors and connection clamps. In operation, the iron cap at the top and the steel foot at the bottom of the porcelain insulator are used directly as two electrodes. The high-voltage lead is securely connected to the iron cap, while the steel foot is connected to the grounding terminal of the test circuit. Current flows from the iron cap, penetrating the cement adhesive and the interior of the porcelain component. The operator operates the power frequency high-voltage tester from a safe distance. After closing the circuit, the voltage will start from zero and rise evenly and steadily at a rate of approximately 3kV per second or faster until breakdown occurs. At the moment of breakdown, the current... The voltage will increase sharply, and the protection device will cut off the power supply. The voltage value recorded at this time is the power frequency breakdown voltage of the insulator. During the above test, the staff needs to use a gantry crane to slowly lift the assembled insulator with the high and low voltage electrodes connected and place it steadily into the oil tank. When the test is over and the insulator is broken down, the insulating oil has a certain viscosity and surface tension. A large amount of oil will adhere to the porcelain surface, iron cap, steel foot, as well as the clamps and electrode wires used for connection. It needs to undergo a considerable period of standing and draining oil. During this period, the gantry crane needs to continuously suspend the workpiece, and the staff cannot carry out the next disassembly or installation work, which affects the overall testing efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a device and method for testing the insulation performance of porcelain insulators. The porcelain insulator workpiece to be tested for breakdown voltage is fixed by a flip-type fixture, with the high-voltage and low-voltage electrode clamps on the telescopic ends of two spring balancers connected to the iron cap and steel foot of the insulator, respectively. Then, a long-axis reversing drive causes the flip-type fixture and porcelain insulator to flip downwards, and a lifting assembly completely immerses the insulator, high-voltage electrode clamps, and low-voltage electrode clamps in an oil immersion tank. After an external power frequency high-voltage tester completes the breakdown voltage test using the high and low-voltage electrode clamps, the lifting assembly removes the flip-type fixture containing the porcelain insulator from the insulating oil. A pump assembly and a multi-pipe air blowing assembly then use high-pressure airflow to gradually blow the insulating oil away from the insulator and electrode clamps. During this blowing process, the long-axis reversing drive causes the insulator to change face, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a porcelain insulator insulation performance testing device, comprising an outer insulating shell constituting a closed chamber and an oil immersion tank fixedly disposed inside the lower part of the outer insulating shell, wherein the top of the outer insulating shell is provided with a V-shaped opening; The lifting assembly is installed inside the outer insulating shell and located behind the oil immersion tank. The driving end of the lifting assembly is equipped with a flip-type fixture. A long-shaft commutator is provided above the oil immersion tank to drive the flip-type fixture to rotate the porcelain insulator around the horizontal axis to change its posture. The long-shaft commutator is connected to the driving end of the lifting assembly. Two spring balancers are fixed at the highest point of the top of the outer insulating shell. Each spring balancer has a retractable suspension rope. A high-voltage electrode clamp and a low-voltage electrode clamp are respectively installed at the lower end of the suspension rope of each spring balancer. The high-voltage electrode clamp and the low-voltage electrode clamp are electrically connected to an external power frequency high-voltage tester through wires. An air pump assembly is located outside the outer insulating shell. A multi-pipe air blowing assembly is installed diagonally above the oil immersion tank away from the long-shaft commutator. The air inlet of the multi-pipe air blowing assembly is connected to the air outlet of the air pump assembly. The control box is mounted on one side of the outer wall of the outer insulating shell and is electrically connected to the lifting assembly, the long-shaft reversing drive, and the air pump assembly.

[0005] Preferably, upright arms are fixed on both the left and right sides of the top of the outer insulating shell, and the spring balancer is installed on the outer wall of the upright arm near the V-shaped opening. An oil inlet valve and an oil outlet valve are installed at intervals along the vertical direction on one side of the outer wall of the oil immersion tank.

[0006] Preferably, the lifting assembly includes an inner frame fixed to the outer wall of the back of the immersion tank, a servo motor mounted on the top of the inner frame, a lead screw fixed to the lower end of the output shaft of the servo motor via a coupling, and side frames slidably mounted on the left and right inner walls of the inner frame in a vertical direction. At least one crossbar is fixed between the two side frames, a middle seat is fixed on the crossbar, and a nut pair coaxial with the lead screw is fixed on the outer wall of the middle seat on the side away from the immersion tank.

[0007] Preferably, the outer wall of the side frame is rotatably mounted with rollers that contact the inner gantry, and the side frame is also provided with a notch for avoiding the oil immersion tank.

[0008] Preferably, the flip-type tooling includes a short shaft rotatably mounted at a lower position on the side frame, a U-shaped long frame fixed between the opposite ends of the two short shafts, and a U-shaped bracket with feet fixedly mounted on the U-shaped long frame. The top of the U-shaped bracket with feet is fixed with four rubber columns, and the upper ends of the four rubber columns are jointly fixed with a top plate. A hollow chuck is installed at the center of the top of the top plate.

[0009] Preferably, the long-shaft commutator driver includes a servo motor, a shaft box, a long bevel gear shaft, and a driven bevel gear; Servo motor 2 is mounted on the outer wall of one of the side frames at the highest point via a motor mount. The axle box is fixed on the outer wall of the side frame on one side of servo motor 2. The long shaft of the bevel gear is rotatably mounted on the top of the axle box via ball bearings. The upper end of the long shaft of the bevel gear is connected to the lower end of the output shaft of servo motor 2 via a coupling. The driven bevel gear is fixed on one of the short shafts and meshes with the lower end of the long shaft of the bevel gear.

[0010] Preferably, the air pump assembly includes an air pump disposed outside the outer insulating shell, an exhaust pipe installed on the air outlet of the air pump, and a solenoid valve installed at the end of the exhaust pipe. The end of the solenoid valve away from the exhaust pipe is equipped with a tee pipe for connecting to a multi-pipe air blowing assembly.

[0011] Preferably, the outer wall of the outer insulating shell on one side of the control box is a sloping panel, and the multi-pipe air blowing assembly is set on the back of the sloping panel and faces the flip-type tooling at the high point.

[0012] Preferably, the multi-pipe air blowing assembly includes an aluminum alloy frame installed on the back of the slope panel, two C-shaped side pipes installed on the inner wall of one side of the aluminum alloy frame, and a main blowing pipe, a valve control group, a middle blowing pipe, and an auxiliary blowing pipe installed on the outer wall of the aluminum alloy frame away from the slope panel. The beginning and end ends of the main blowing pipe, the valve control group, the middle blowing pipe, and the auxiliary blowing pipe are connected in sequence. One end of the main blowing pipe and the C-shaped side pipe are connected, and the other end of the C-shaped side pipe is connected to a T-connector. A connecting pipe is installed between two adjacent valve control groups.

[0013] The present invention also provides a method for testing the insulation performance of porcelain insulators, using the testing device described above, comprising the following steps: S101: The disc-shaped suspension porcelain insulator to be tested is taken out from the temporary storage area and placed in the predetermined fixed position of the flip-type fixture and locked. After the workpiece is fixed, the operator holds the high voltage electrode clamp and the low voltage electrode clamp. Using the tension characteristics of the spring balancer, the high voltage electrode clamp is clamped to the iron cap of the insulator, and the low voltage electrode clamp is clamped to the steel foot of the insulator. The constant tension provided by the spring balancer ensures that the electrode clamps maintain reliable contact, while allowing the electrodes to have a certain follow-up margin in the vertical direction. S102: After clamping and electrode connection are completed, the control box sends a command to the long-shaft commutator. The long-shaft commutator drives the flip-type fixture to flip down, so that the clamped insulator rotates to a vertically downward position. The lifting assembly carries the long-shaft commutator, the flip-type fixture, and the fixed insulator, high-voltage electrode clamp, low-voltage electrode clamp, and connecting wire, and descends vertically and smoothly until the insulator and the high-voltage electrode clamp and low-voltage electrode clamp connected to the iron cap and steel foot are slowly and completely immersed in the insulating oil in the oil tank. S103: After the test sample is completely submerged, the wires connected to the high-voltage electrode clamp and the low-voltage electrode clamp form a closed loop with the external power frequency high voltage tester. The external power frequency high voltage tester applies high voltage to the insulator according to the set voltage increase rate and test procedure until breakdown occurs or the specified time is reached. After the test is completed, the power frequency high voltage tester automatically cuts off the high voltage and records the results. The control box commands the lifting component to reverse the action, so that the flip-type fixture carrying the insulator and electrode clamp is smoothly lifted from the oil. S104: After the insulator is completely removed from the oil surface, the air pump assembly starts to work, which generates high-pressure airflow. The airflow is directed to the insulator and electrode clamp that have just been lifted out of the oil through the multi-pipe air blowing assembly. During the blowing process, the long-shaft reversing drive is activated again, driving the flip-type fixture to slowly rotate or change the angle of the insulator. This allows the high-pressure airflow to blow onto the surface of each skirt of the insulator, the base of the steel foot, and the connection between the iron cap and the electrode clamp, quickly blowing away most of the insulating oil adhering to them and causing it to drip back into the immersion tank. After the set blowing time, the residual oil on the surface of the insulator is significantly reduced. S105: With the assistance of the spring balancer, remove the high-voltage electrode clamp and low-voltage electrode clamp from the iron cap and steel foot of the insulator to reset them. Then unlock the flip-type fixture, remove the insulator that has completed the test from the fixture, and transfer it to the designated storage area.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The porcelain insulator insulation performance testing device and testing method are equipped with a structure that includes a lifting assembly, a long-shaft reversing drive, a flip-type fixture, a spring balancer, a pump assembly, and a multi-pipe blowing assembly, etc. The high-voltage electrode clamp and the low-voltage electrode clamp on the telescopic ends of the two spring balancers are respectively connected to the iron cap and steel foot of the insulator. Then, the long-shaft reversing drive causes the flip-type fixture and the porcelain insulator to flip down, and the lifting assembly causes the insulator and the high-voltage electrode clamp and the low-voltage electrode clamp to be completely immersed in the oil immersion tank. After the external power frequency high voltage tester completes the breakdown voltage test through the high and low voltage electrode clamps, the lifting assembly causes the flip-type fixture containing the porcelain insulator to be removed from the insulating oil, and the pump assembly and the multi-pipe blowing assembly use high-pressure airflow to gradually blow the insulating oil away from the insulator and the electrode clamp. During the blowing process, the long-shaft reversing drive causes the insulator to change sides, thereby compressing the natural oil draining time that may originally take tens of minutes and shortening the testing cycle of a single workpiece. The system incorporates a pump assembly and a multi-pipe blowing assembly. High-pressure airflow is used to actively purge the insulators, electrode clamps, and connection points that have just been removed from the oil surface. The high-pressure airflow quickly breaks down the adhesion boundary layer between the oil and the solid surface, forcibly blowing away the oil film, drips, and residual oil accumulated in the deep grooves. The oil is then blown back into the immersion tank. During the purging process, a long-shaft reversing drive drives a flip-type fixture to rotate the insulator, allowing the high-pressure airflow to cover the entire surface of the insulator from multiple angles without any blind spots, especially the underside of the skirt and the base of the steel foot, which are the most difficult to drain during traditional natural oil drainage. Secondly, the high-voltage electrode clamp and the low-voltage electrode clamp are connected to the iron cap and steel foot of the insulator through the telescopic end of the spring balancer. When the lifting assembly drives the entire fixture to descend to immerse in oil or rise to detach, even if there are slight position changes or vibrations, the spring balancer can absorb these relative displacements through telescopic expansion and contraction, ensuring that the electrode clamp always maintains a constant and reliable contact pressure with the metal accessories, avoiding loosening or damage caused by rigid connection, thereby ensuring that the voltage applied by the high-voltage tester can be stably conducted to the test sample through the electrodes. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a side view of the structure of the present invention; Figure 4 yes Figure 1 Sectional view at point AA; Figure 5 yes Figure 1 A three-dimensional structural cross-sectional view of point AA; Figure 6This is a schematic diagram of the three-dimensional cross-sectional structure of the outer insulating shell of the present invention. Figure 1 ; Figure 7 This is a three-dimensional structural diagram of the lifting component of the present invention; Figure 8 This is a three-dimensional structural diagram of the long-shaft commutator driver of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the flip-type tooling of the present invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram at point A in the middle; Figure 11 This is a schematic diagram of the three-dimensional cross-sectional structure of the outer insulating shell of the present invention. Figure 2 ; Figure 12 This is a three-dimensional structural diagram of the air pump assembly of the present invention; Figure 13 This is a three-dimensional structural diagram of the multi-tube blowing pipe assembly of the present invention.

[0016] In the diagram: 1. Outer insulating shell; 101. Sloping panel; 102. V-shaped opening; 103. Vertical arm; 2. Oil immersion tank; 3. Inner gantry; 4. Lifting assembly; 401. Servo motor one; 402. Lead screw; 403. Side frame; 4031. Roller; 4032. Notch; 404. Crossbar; 405. Center seat; 406. Nut pair; 5. Long-shaft reversing drive; 501. Servo motor two; 502. Axle box; 503. Long shaft of bevel gear; 504. Driven bevel gear; 6. Flip-type fixture; 601. Short shaft; 602. 603. U-shaped long frame; 604. U-shaped frame with legs; 605. Rubber column; 606. Top plate; 607. Hollow chuck; 7. Spring balancer; 8. High-voltage electrode clamp; 9. Low-voltage electrode clamp; 10. Multi-pipe air blowing assembly; 1001. C-shaped side pipe; 1002. Main jet pipe; 1003. Pipe valve control assembly; 1004. Middle jet pipe; 1005. Auxiliary jet pipe; 1006. Connecting pipe; 11. Air pump assembly; 1101. Air pump; 1102. Exhaust pipe; 1103. Solenoid valve; 1104. T-connector; 12. Control box. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] Example 1, by Figures 1 to 6The present invention includes an outer insulating shell 1 forming a closed chamber and an oil immersion tank 2 fixedly disposed inside the lower part of the outer insulating shell 1. The top of the outer insulating shell 1 is provided with a V-shaped opening 102. Lifting assembly 4 is installed inside the outer insulating shell 1 and located behind the oil immersion tank 2. The driving end of the lifting assembly 4 is equipped with a flip-type fixture 6. A long-shaft commutator 5 is provided above the oil immersion tank 2 to drive the flip-type fixture 6 to rotate the porcelain insulator around the horizontal axis to change its posture. The long-shaft commutator 5 is connected to the driving end of the lifting assembly 4. Two spring balancers 7 are fixed at the highest point of the top of the outer insulating shell 1. Each spring balancer 7 has a retractable suspension rope. The lower end of the suspension rope of each spring balancer 7 is respectively equipped with a high voltage electrode clamp 8 and a low voltage electrode clamp 9. The high voltage electrode clamp 8 and the low voltage electrode clamp 9 are electrically connected to the external power frequency high voltage tester through wires. The air pump assembly 11 is located outside the outer insulating shell 1. The oil immersion tank 2 is installed diagonally above the long shaft reversing drive 5. The air inlet of the multi-pipe air blowing assembly 10 is connected to the air outlet of the air pump assembly 11. The control box 12 is installed on one side of the outer wall of the outer insulating shell 1 and is electrically connected to the lifting assembly 4, the long shaft reversing drive 5, and the air pump assembly 11. The top left and right sides of the outer insulating shell 1 are fixed with upright arms 103. The spring balancer 7 is installed on the outer wall of the upright arm 103 near the V-shaped opening 102. The oil inlet valve and the oil outlet valve are installed at intervals along the vertical direction on the outer wall of the oil immersion tank 2. The outer insulating shell 1 physically separates the live parts from the area where the operators are located through its insulating material and relatively closed structure. When high voltage testing is carried out inside, the outer insulating shell 1 can prevent personnel from accidentally contacting the live parts. During the purging stage, it can effectively contain oil mist and prevent it from polluting the workshop environment. The oil immersion tank 2 stores a sufficient amount of insulating oil to prevent high voltage from flashing along the surface of the insulator, thereby forcing the current to penetrate from the inside and truly reflecting the internal defects of the insulator. The V-shaped opening 102 allows workers to clamp insulators and connect electrodes to the flip-type fixture 6, which is located at a high position. The boom 103 is used for the spring balancer 7 to be positioned at a high point. When the lifting assembly 4 drives the entire tooling to move up and down, there will inevitably be a height difference due to the mechanical movement. If the high voltage electrode clamp 8 and the low voltage electrode clamp 9 are rigidly connected, they are easily pulled loose or damaged. However, the spring balancer 7 has a constant force spring inside. When the long shaft reversing drive 5 and the flip tooling 6 move up and down, the telescopic end of the spring balancer 7 will automatically extend or shorten to compensate for the displacement difference. The high-voltage electrode clamp 8 is directly connected to the high-voltage output terminal of the external power frequency high-voltage tester via the cable it is connected to. When the test is started, the high-voltage current flows out from the tester, reaches the high-voltage electrode clamp 8 via the high-voltage cable, and is then injected into the iron cap of the insulator through the clamping point. During this process, the low-voltage electrode clamp 9 is connected to the grounding terminal of the test circuit via the cable.

[0019] This embodiment of a method for testing the insulation performance of porcelain insulators, using the aforementioned testing device, includes the following steps: S101: The disc-shaped suspension porcelain insulator to be tested is taken out from the temporary storage area and placed in the predetermined fixed position of the flip-type fixture 6 and locked. After the workpiece is fixed, the operator holds the high voltage electrode clamp 8 and the low voltage electrode clamp 9. Using the tensile characteristics of the spring balancer 7, the high voltage electrode clamp 8 is clamped to the iron cap of the insulator, and the low voltage electrode clamp 9 is clamped to the steel foot of the insulator. The constant tension provided by the spring balancer 7 ensures that the electrode clamps maintain reliable contact, while allowing the electrode to have a certain follow-up margin in the vertical direction. S102: After clamping and electrode connection are completed, the control box 12 sends a command to the long shaft reversing drive 5. The long shaft reversing drive 5 drives the flip-type fixture 6 to flip down, so that the clamped insulator rotates to a vertically downward position. The lifting assembly 4 carries the long shaft reversing drive 5, the flip-type fixture 6, and the fixed insulator, high voltage electrode clamp 8, low voltage electrode clamp 9 and connecting wire, and descends vertically and smoothly until the insulator and the high voltage electrode clamp 8 and low voltage electrode clamp 9 connected to the iron cap and steel foot are slowly and completely immersed in the insulating oil in the oil tank 2. S103: After the test sample is completely submerged, the wires connected to the high-voltage electrode clamp 8 and the low-voltage electrode clamp 9 form a closed loop with the external power frequency high voltage tester. The external power frequency high voltage tester applies high voltage to the insulator according to the set voltage increase rate and test procedure until breakdown occurs or the specified time is reached. After the test is completed, the power frequency high voltage tester automatically cuts off the high voltage and records the results. The control box 12 instructs the lifting component 4 to reverse the action, so that the flip-type fixture 6 carrying the insulator and electrode clamp is smoothly lifted from the oil. S104: After the insulator is completely removed from the oil surface, the air pump assembly 11 starts to work, which generates high-pressure airflow. The airflow is directed to the insulator and electrode clamp that have just been lifted from the oil through the multi-pipe air blowing assembly 10. During the blowing process, the long shaft reversing drive 5 is activated again, driving the flip-type tooling 6 to slowly rotate or change the angle of the insulator, so that the high-pressure airflow blows onto the surface of each skirt of the insulator, the root of the steel foot, and the connection between the iron cap and the electrode clamp, quickly blowing away most of the insulating oil attached to it and causing it to drip back into the immersion tank 2. After the set blowing time, the residual oil on the surface of the insulator is significantly reduced. S105: With the assistance of the spring balancer 7, remove the high-voltage electrode clamp 8 and the low-voltage electrode clamp 9 from the iron cap and steel foot of the insulator to reset them. Then unlock the flip-type fixture 6, remove the insulator that has completed the test from the fixture, and transfer it to the designated storage area.

[0020] Example 2, based on Example 1, is... Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the lifting assembly 4 includes an inner frame 3 fixed to the outer wall of the back of the oil immersion tank 2, a servo motor 401 mounted on the top of the inner frame 3, a lead screw 402 fixed to the lower end of the output shaft of the servo motor 401 by a coupling, and side frames 403 slidably mounted on the left and right inner walls of the inner frame 3 in the vertical direction. At least one crossbar 404 is fixed between the two side frames 403. A middle seat 405 is fixed on the crossbar 404, and a nut pair 406 coaxial with the lead screw 402 is fixed on the outer wall of the middle seat 405 away from the oil immersion tank 2. Rollers 4031 are rotatably mounted on the outer wall of the side frame 403 to contact the inner gantry 3. The side frame 403 and the inner wall of the inner gantry 3 are slidably engaged by the rollers 4031 to reduce friction during the lifting process and improve lifting stability. The side frame 403 is also provided with a notch 4032 to avoid the oil immersion tank 2. The notch 4032 is used to reduce the movement interference between the side frame 403 and the oil immersion tank 2, so that the side frame 403, the long shaft reversing drive 5, and the flip-type tooling 6 can obtain more sinking space. Taking the lifting assembly 4 driving the long shaft reversing drive 5, the flip-type fixture 6 and the insulator to be immersed in the oil immersion tank 2 as an example, the servo motor 401 drives the lead screw 402 to rotate, and the lead screw 402 drives the nut assembly 406, the middle seat 405, the crossbar 404 and the side frame 403 to descend through the nut assembly 406 until the flip-type fixture 6 and the clamped insulator are submerged in the insulating oil. By descending slowly and at a uniform speed, the shaking and uneven speed that may occur in manual hoisting are avoided, and air bubbles are effectively prevented from being trapped under the insulator skirt due to too fast immersion, ensuring that the test sample is fully and seamlessly wrapped by the oil medium. The flip-type fixture 6 includes a short shaft 601 rotatably mounted at a lower position on the side frame 403, a U-shaped long frame 602 fixed between the opposite ends of the two short shafts 601, and a loop-shaped bracket 603 fixedly mounted on the U-shaped long frame 602. Four rubber posts 604 are fixed to the top of the loop-shaped bracket 603, and a top plate 605 is fixed to the upper end of the four rubber posts 604. A hollow chuck 606 is installed at the center of the top of the top of the top plate 605. The steel feet of the insulator workpiece to be tested face down and are fixed by the hollow chuck 606. At this time, the hollow chuck 606 applies a clamping force to the steel feet of the insulator workpiece. The long-shaft commutator 5 includes a servo motor 501, a shaft box 502, a long bevel gear shaft 503, and a driven bevel gear 504; Servo motor 2 501 is mounted on the high point of the outer wall of one of the side frames 403 via a motor mount, which can prevent servo motor 2 501 from being immersed in oil. The axle box 502 is fixed on the outer wall of the side frame 403 on one side of the servo motor 2 501. The long shaft of the bevel gear 503 is rotatably mounted on the top of the axle box 502 through ball bearings. The upper end of the long shaft of the bevel gear 503 is connected to the lower end of the output shaft of the servo motor 2 501 through a coupling. The driven bevel gear 504 is fixed on one of the short shafts 601 and meshes with the lower end of the long shaft of the bevel gear 503. When the long-shaft reversing drive 5 drives the flip-type tooling 6 to move, the output shaft of the servo motor 501 transmits rotational torque to one of the short shafts 601 through the long bevel gear 503 and the driven bevel gear 504. As a result, the U-shaped long frame 602, the loop-shaped bracket 603 and the clamped insulator workpiece rotate and change surfaces around the short shaft 601. The long-shaft reversing drive 5 facilitates the connection of electrodes by the staff and provides more immersion space. At the same time, when the sample is raised from the oil, the long-shaft reversing drive 5 drives the flip-type fixture 6 to rotate the insulator. In conjunction with the multi-pipe air blowing assembly 10, the high-pressure airflow blows to the surface of each skirt and dead corner of the insulator, realizing multi-angle blowing.

[0021] Example 3, based on Example 2, by Figure 11 , Figure 12 and Figure 13 The air pump assembly 11 includes an air pump 1101 disposed outside the outer insulating shell 1, an exhaust pipe 1102 installed on the air outlet of the air pump 1101, and a solenoid valve 1103 installed at the end of the exhaust pipe 1102. A three-way pipe 1104 for connecting to the multi-pipe air blowing assembly 10 is installed at the end of the solenoid valve 1103 away from the exhaust pipe 1102. After the air pump 1101 is working, the solenoid valve 1103 is in the normally open state. The high-pressure airflow generated by the air pump 1101 enters the multi-pipe air blowing assembly 10 through the exhaust pipe 1102, the solenoid valve 1103 and the three-way pipe 1104 in sequence, thereby providing air with sufficient pressure and flow. The outer wall of the outer insulating shell 1 on one side of the control box 12 is a slope panel 101. The multi-pipe air blowing assembly 10 is set on the back of the slope panel 101 and faces the flip-type tooling 6 at the high point. The multi-pipe air blowing assembly 10 includes an aluminum alloy frame installed on the back of the slope panel 101, two C-shaped side pipes 1001 installed on the inner wall of one side of the aluminum alloy frame, and a main blowing pipe 1002, a pipe valve control group 1003, a middle blowing pipe 1004, and an auxiliary blowing pipe 1005 installed on the outer wall of the aluminum alloy frame away from the slope panel 101. The beginning and end ends of the main blowing pipe 1002, the pipe valve control group 1003, the middle blowing pipe 1004, and the auxiliary blowing pipe 1005 are connected in sequence. One end of the main blowing pipe 1002 and the C-shaped side pipe 1001 are connected, and the other end of the C-shaped side pipe 1001 is connected to the three-way pipe 1104. A connecting pipe 1006 is installed between two adjacent pipe valve control groups 1003. High-pressure air is diverted through the three-way pipe 1104 to two C-shaped side pipes 1001, and is sprayed sequentially through the main jet pipe 1002, the middle jet pipe 1004, and the auxiliary jet pipe 1005 onto the flip-type tooling 6 and the insulator workpiece. This replaces passive gravity oil draining with purging, shortening the time required for the sample to be removed from the oil until there is basically no oil dripping on the surface. It should be noted that the connecting pipe 1006 is used to connect the two pipe valve control groups 1003 to realize airflow conduction, and the air pump 1101 mentioned above can also be replaced by an air compressor.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A porcelain insulator insulation performance detection device, comprising an outer insulation shell (1) forming a closed chamber and an oil immersion tank (2) fixedly arranged at a lower position inside the outer insulation shell (1), and a V-shaped opening portion (102) is arranged at the top end of the outer insulation shell (1), characterized in that: a lifting assembly (4) is installed in the outer insulation shell (1) and located behind the oil immersion tank (2), and a drive end of the lifting assembly (4) is provided with a turnover tool (6), an elongated shaft reversing driver (5) is arranged above the oil immersion tank (2) and used to drive the turnover tool (6) to rotate the porcelain insulator around a horizontal axis to change the posture of the porcelain insulator, and the elongated shaft reversing driver (5) is connected with the drive end of the lifting assembly (4); two spring balancers (7) are fixedly arranged at high points of the top end of the outer insulation shell (1), each spring balancer (7) has an extendable hanging rope, a high-voltage electrode clamp (8) and a low-voltage electrode clamp (9) are respectively arranged at the lower end of each spring balancer (7), and the high-voltage electrode clamp (8) and the low-voltage electrode clamp (9) are electrically connected with an external power frequency high-voltage tester through wires; a pump air assembly (11) is arranged outside the outer insulation shell (1), a multi-union blowing pipe group (10) is arranged obliquely above the oil immersion tank (2) away from the elongated shaft reversing driver (5), and an air inlet end of the multi-union blowing pipe group (10) is in communication with an air outlet of the pump air assembly (11); and a control box (12) is arranged on one side outer wall of the outer insulation shell (1) and electrically connected with the lifting assembly (4), the elongated shaft reversing driver (5) and the pump air assembly (11). Left and right sides of the top end of the outer insulation shell (1) are fixedly provided with vertical arms (103), the spring balancer (7) is arranged on one side outer wall of the vertical arm (103) close to the V-shaped opening portion (102), and an oil inlet valve and an oil discharge valve are arranged on one side outer wall of the oil immersion tank (2) in a vertically spaced manner. The lifting assembly (4) comprises an inner gantry (3) fixed on the back outer wall of the oil immersion tank (2), a servo motor one (401) arranged at the top end of the inner gantry (3), a screw rod (402) fixed at the lower end of the output shaft of the servo motor one (401) through a shaft coupling, and side frames (403) arranged on left and right inner walls of the inner gantry (3) in a vertically sliding manner, at least one cross rod (404) is fixed between the two side frames (403), a middle seat (405) is fixed on the cross rod (404), and a nut pair (406) coaxial with the screw rod (402) is fixed on one side outer wall of the middle seat (405) away from the oil immersion tank (2). Rollers (4031) in contact with the inner gantry (3) are rotatably arranged on the outer wall of the side frame (403), and notches (4032) for avoiding the oil immersion tank (2) are arranged on the side frame (403). ​ 2. The porcelain insulator insulating performance detection device according to claim 1, characterized in that: ​ 3. The device for detecting the insulation performance of a porcelain insulator according to claim 1, characterized in that: ​ 4. The device for detecting the insulation performance of a porcelain insulator according to claim 3, characterized in that: ​ 5. The device for detecting the insulation performance of a porcelain insulator according to claim 3, characterized in that: The turnover tool (6) comprises a short shaft (601) rotatably installed at a lower position of the side frame (403), a U-shaped long frame (602) fixed between opposite ends of the two short shafts (601), and a meandering strip foot frame (603) fixedly installed on the U-shaped long frame (602), wherein the top end of the meandering strip foot frame (603) is fixed with four rubber columns (604), and the upper ends of the four rubber columns (604) are jointly fixed with a top disc (605), and the center position of the top end of the top disc (605) is installed with a hollow chuck (606).

6. The device for detecting the insulation performance of a porcelain insulator according to claim 5, characterized in that: The long shaft reversing driver (5) comprises a servo motor two (501), a shaft box (502), a bevel gear long shaft (503), and a driven bevel gear (504); The servo motor two (501) is installed on one side of the outer wall of one of the side frames (403) through a motor base at a high point position, the shaft box (502) is fixed to the outer wall of the side frame (403) on one side of the servo motor two (501), the bevel gear long shaft (503) is rotatably installed at the top end of the shaft box (502) through a ball bearing, and the upper end of the bevel gear long shaft (503) is connected to the lower end of the output shaft of the servo motor two (501) through a shaft coupling, and the driven bevel gear (504) is fixed to one of the short shafts (601) and meshes with the lower end of the bevel gear long shaft (503).

7. The device for detecting the insulation performance of a porcelain insulator according to claim 1, characterized in that: The pump assembly (11) comprises a gas pump (1101) arranged outside the outer insulation shell (1), an exhaust pipe (1102) installed at the gas outlet of the gas pump (1101), and an electromagnetic valve (1103) installed at the end of the exhaust pipe (1102), wherein the electromagnetic valve (1103) is installed with a three-way pipe (1104) for connecting the multi-connection pipe blowing pipe group (10) at the end away from the exhaust pipe (1102).

8. The device for detecting the insulation performance of a porcelain insulator according to claim 7, characterized in that: The outer wall of the control box (12) on one side of the outer insulation shell (1) is a slope panel (101), and the multi-connection pipe blowing pipe group (10) is arranged on the back of the slope panel (101) and faces the turnover tool (6) at a high point position.

9. The device for detecting the insulation performance of a porcelain insulator according to claim 8, characterized in that: The multi-connection pipe blowing pipe group (10) comprises an aluminum alloy frame installed on the back of the slope panel (101), two C-shaped side pipes (1001) installed on the inner wall of one side of the aluminum alloy frame, and a main blowing pipe (1002), a pipe valve control group (1003), a middle blowing pipe (1004), and a secondary blowing pipe (1005) installed on the outer wall of the aluminum alloy frame away from the slope panel (101), wherein the first and last ends of the main blowing pipe (1002), the pipe valve control group (1003), the middle blowing pipe (1004), and the secondary blowing pipe (1005) are connected in sequence, one end of the main blowing pipe (1002) and the C-shaped side pipe (1001) are connected, the other end of the C-shaped side pipe (1001) is connected with the three-way pipe (1104), and a communication pipe (1006) is installed between adjacent two pipe valve control groups (1003).

10. A method for detecting the insulation performance of a porcelain insulator, using the detection device according to any one of claims 1-9, characterized in that: The method comprises the following steps: S101: The disc-shaped suspension porcelain insulator to be tested is taken out from the temporary storage area and placed in the predetermined fixed position of the flip-type fixture (6) and locked. After the workpiece is fixed, the operator holds the high voltage electrode clamp (8) and the low voltage electrode clamp (9). Using the tensile characteristics of the spring balancer (7), the high voltage electrode clamp (8) is clamped onto the iron cap of the insulator, and the low voltage electrode clamp (9) is clamped onto the steel foot of the insulator. The constant tension provided by the spring balancer (7) ensures that the electrode clamps maintain reliable contact, while allowing the electrode to have a certain follow-up margin in the vertical direction. S102: After clamping and electrode connection are completed, the control box (12) sends a command to the long shaft reversing drive (5). The long shaft reversing drive (5) drives the flip-type fixture (6) to flip down, so that the clamped insulator rotates to a vertically downward position. The lifting assembly (4) carries the long shaft reversing drive (5), the flip-type fixture (6), and the fixed insulator, high voltage electrode clamp (8), low voltage electrode clamp (9) and connecting wire, and descends vertically and smoothly until the insulator and the high voltage electrode clamp (8) and low voltage electrode clamp (9) connected to the iron cap and steel foot are slowly and completely immersed in the insulating oil in the oil tank (2). S103: After the test sample is completely submerged, the wires connected to the high voltage electrode clamp (8) and the low voltage electrode clamp (9) form a closed loop with the external power frequency high voltage tester. The external power frequency high voltage tester applies high voltage to the insulator according to the set voltage increase rate and test procedure until breakdown occurs or the specified time is reached. After the test is completed, the power frequency high voltage tester automatically cuts off the high voltage and records the results. The control box (12) instructs the lifting assembly (4) to reverse the action and smoothly lift the flip-type fixture (6) carrying the insulator and electrode clamp from the oil. S104: When the insulator is completely removed from the oil surface, the air pump assembly (11) starts to work and generates high-pressure airflow. The airflow is directed to the insulator and electrode clamp that have just been lifted from the oil through the multi-pipe air blowing assembly (10). During the blowing process, the long shaft reversing drive (5) is activated again, driving the flip-type tooling (6) to slowly rotate or change the angle of the insulator, so that the high-pressure airflow blows to the surface of each skirt of the insulator, the root of the steel foot and the connection between the iron cap and the electrode clamp, and quickly blows away most of the insulating oil attached to it, so that it drips back into the immersion tank (2). After the set blowing time, the residual oil on the surface of the insulator is significantly reduced. S105: With the assistance of the spring balancer (7), remove the high voltage electrode clamp (8) and the low voltage electrode clamp (9) from the iron cap and steel foot of the insulator to reset them. Then unlock the flip-type fixture (6), remove the insulator that has completed the test from the fixture, and transfer it to the designated storage area.

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