Insulation sleeve sealing detection device for inflatable cabinet

Abstract

The present invention belongs to the technical field of insulating sleeve seal detection technology, specifically a device for detecting the seal of insulating sleeves for use in gas-filled cabinets. The device comprises a support frame, a test bench, an inflatable-type density measurement mechanism, and a discharge-type pressure measurement mechanism. The test bench is located on the upper wall of the support frame, the inflatable-type density measurement mechanism is located on the upper wall of the test bench, and the discharge-type pressure measurement mechanism is located outside the inflatable-type density measurement mechanism. The inflatable-type density measurement mechanism includes a sliding assembly and a clamping assembly. The present invention provides a device for detecting the seal of insulating sleeves for use in gas-filled cabinets that utilizes tip discharge to shorten the distance between the conductor and the tip to test for minor leaks on the surface of the insulating sleeve.

Description

Technical Field

[0001] The invention belongs to the technical field of insulating sleeve sealing detection, and in particular relates to an insulating sleeve sealing detection device for an inflatable cabinet. Background Art

[0002] Conductors within a gas cabinet generate an electric field when energized. If these conductors are directly exposed to the gas atmosphere (such as SF6 or N2), the electric field strength on the conductor surface may be unevenly distributed, with electric field concentrations easily occurring at points and burrs, leading to partial discharges and even insulation breakdown. Tubular insulating sleeves, placed over the conductors, isolate them from the surrounding gas, preventing direct contact between them and the gas, thus preventing electrical faults caused by electric field concentration.

[0003] The existing insulating sleeve sealing detection device for inflatable cabinets has the following problems:

[0004] When the existing insulating sleeve sealing detection device for an inflatable cabinet uses a positive pressure test method to test the sealing of the insulating sleeve, the positive pressure test mainly relies on the pressure decay rate to judge the leakage. The sensitivity of the test for small leaks is insufficient, resulting in missing potential hidden dangers, thereby reducing the test efficiency of the sealing of the insulating sleeve. Therefore, it cannot meet the existing use requirements of the insulating sleeve sealing detection device for an inflatable cabinet. Summary of the Invention

[0005] In view of the above situation, in order to overcome the defects of the existing technology, the present invention provides an insulating sleeve sealing detection device for an inflatable cabinet that can use tip discharge to test tiny leaks on the surface of the insulating sleeve by shortening the distance between the conductor and the tip.

[0006] The technical solution adopted in this scheme is as follows: The insulating sleeve sealing detection device for an inflatable cabinet proposed in this scheme includes a support frame, a test bench, an inflatable density measuring mechanism and a discharge type pressure measuring mechanism. The test bench is arranged on the upper wall of the support frame, the inflatable density measuring mechanism is arranged on the wall of the test bench, and the discharge type pressure measuring mechanism is arranged on the outside of the inflatable density measuring mechanism. The inflatable density measuring mechanism includes a sliding assembly and a clamping assembly. The sliding assembly is arranged on the wall of the test bench, and the clamping assembly is arranged on the side wall of the sliding assembly. The discharge type pressure measuring mechanism includes a tip release assembly, an outer drum assembly and a pressure measuring assembly. The tip release assembly is arranged on the outside of the sliding assembly, the outer drum assembly is arranged inside the sliding assembly, and the pressure measuring assembly is arranged at the end of the sliding assembly away from the tip release assembly.

[0007] As a further preferred embodiment of the present invention, the sliding adjustment component includes a sliding frame, an inflation channel, an inflation valve and a pressure sensor. The sliding frame is symmetrically arranged on the upper walls at both ends of the test bench, and the sliding frame is slidably connected to the test bench. The inflation channel is arranged on the inner wall of the sliding frame, and the inflation valve is connected to the upper wall of one end of the inflation channel. The pressure sensor is arranged on the inner wall of the inflation channel close to the inflation valve; the clamping component includes a threaded hole, a clamping bolt and a clamping arc plate. The threaded holes are symmetrically arranged on both sides of the sliding frame, the clamping bolt is arranged inside the threaded hole, the clamping bolt is threadedly connected to the threaded hole, and the clamping arc plate is rotatably arranged on the side of the clamping bolt close to the sliding frame, and the clamping arc plates are arranged relatively.

[0008] During use, the sliding frame slides back to back along the wall of the test bench, the distance between the inflation channels increases, the insulating sleeve to be tested is placed between the inflation channels, the sliding frame is pushed, and the sliding frame slides relatively along the wall of the test bench. The inflation channels are respectively inserted into the two ends of the insulating sleeve, and then the clamping bolt is rotated. The clamping bolt rotates along the threaded hole to drive the clamping arc plate close to the inflation channel. The clamping arc plate squeezes and fixes the insulating sleeve on the outside of the inflation channel, opens the inflation valve, and the operator fills air into the inflation channel through the inflation valve to perform a quantitative inflation test on the insulating sleeve. The pressure sensor monitors the air pressure filled into the insulating sleeve in real time through the detection end, thereby detecting whether there is leakage in the insulating sleeve.

[0009] Preferably, the tip discharge assembly includes a discharge frame, a discharge tip and an insulating cover, the discharge frame is arranged on the end of the sliding frame away from the inflation valve, multiple groups of the discharge tips are arranged on the inner wall of the discharge frame, and the insulating cover is arranged on the outer side of the discharge frame; the outer drum assembly includes a guide plate, a vent, a guide tube, a push plate, an insulating channel, a superelastic alloy strip, a mutual abutment plate, a soft magnetic strip and an electromagnetic column, the guide plate is slidably arranged on the inner wall of the inflation channel, multiple groups of the vent are arranged on the side wall of the guide plate, the guide tube passes through the sliding frame and is arranged on the side wall of the guide plate, the guide tube is slidably connected to the sliding frame, the push plate is arranged on the side of the guide tube away from the guide plate, and the insulating channel is arranged on the inner wall of the guide tube. Multiple groups of superelastic alloy strips are arranged on the side of the guide plate away from the guide tube, the mutual resistance plate is arranged on the side of the superelastic alloy strip away from the guide plate, the soft magnetic strip is arranged on the inner wall of the superelastic alloy strip, the electromagnetic column is arranged on the side wall of the mutual resistance plate inside the superelastic alloy strip, and the soft magnetic strip and the electromagnetic column are arranged opposite to each other; the pressure measuring assembly includes a conductive copper strip, a pressure measuring seat, a pressure measuring meter and a pressure measuring cable, the conductive copper strip is arranged on the side of the superelastic alloy strip away from the soft magnetic strip, the pressure measuring seat is arranged on the side of the sliding frame close to the inflation channel, the pressure measuring meter is arranged on the side of the pressure measuring seat away from the sliding frame, and the pressure measuring cable passes through the guide tube and is arranged between the pressure measuring end of the pressure measuring meter and the conductive copper strip.

[0010] When in use, the quantitative inflation test mainly relies on the pressure decay rate to judge the leakage, but it is not sensitive enough to small leaks. At this time, the push plate is pushed, and the push plate drives the guide plate to slide along the inner wall of the inflation channel through the guide tube. The guide plate drives the mutual resistance plate to move relative to each other through the superelastic alloy strip. As the length of the guide tube extending into the inflation channel increases, the mutual resistance plates fit together, and the electromagnetic column is energized to generate a magnetic field between the electromagnetic column and the soft magnetic strip. The electromagnetic column and the soft magnetic strip are set with the same poles. After the mutual resistance plates fit together, continue to push the guide tube. The guide tube squeezes the superelastic alloy strip to cause it to bend. Under the force of the magnetic field with the same poles as the electromagnetic column and the soft magnetic strip, the superelastic alloy strip is pressed against the guide tube. The superelastic alloy strip protrudes toward one side of the inner wall of the insulating sleeve, and the superelastic alloy strip drives the conductive copper strip close to the discharge tip. The distance between the discharge tip and the conductive copper strip is greater than the distance between the discharge tips, and the potential difference between the discharge tip and the conductive copper strip is large. When a tiny hole appears in the insulating sleeve, the discharge from the discharge tip can penetrate the tiny leakage hole and connect with the conductive copper strip inside the insulating sleeve. The pressure meter monitors the charged condition inside the conductive copper strip in real time through the pressure measuring cable. When the pressure data of the pressure meter changes, the discharge from the discharge tip is conducted into the conductive copper strip, and the insulating sleeve leaks.

[0011] Specifically, a controller is provided on the side wall of the support frame.

[0012] Wherein, the controller is electrically connected to the electromagnetic column and the pressure sensor respectively.

[0013] The beneficial effects achieved by adopting the above structure are as follows:

[0014] Compared with the existing technology, this solution adopts a combination of an inner guide wall structure and a tip discharge structure. Through the provision of an inflation-type density measurement mechanism and a discharge-type pressure measurement mechanism, the sliding adjustment component, the clamping component, the tip discharge component, the outer drum component and the pressure measurement component cooperate with each other to detect tiny leaks in the insulating sleeve. By utilizing the deformation of the superelastic alloy strip, under the continuous push and squeeze of the guide tube, the superelastic alloy strip can be bulged to drive the conductive copper strip close to the discharge tip, shortening the electrical connection distance, making it easier to generate electrical connection between the discharge tip and the conductive copper strip, and thus being able to detect tiny leaks in the insulating sleeve, thereby overcoming the insufficient sensitivity of the quantitative inflation test and improving the test efficiency of the sealing of the insulating sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0016] Figure 2 This is the main stereoscopic view of this scheme;

[0017] Figure 3 This is a schematic diagram of the internal structure of this scheme;

[0018] Figure 4 This is a schematic diagram of the structure of the outer drum assembly of this solution;

[0019] Figure 5 This is the main view of this scheme;

[0020] Figure 6 This is a side view of the scheme;

[0021] Figure 7 This is a top view of the scheme;

[0022] Figure 8 for Figure 7 AA section view;

[0023] Figure 9 for Figure 5 BB partial cross-sectional view;

[0024] Figure 10 for Figure 8 A magnified structural view of part I;

[0025] Figure 11 for Figure 2 A magnified structural view of Part II;

[0026] Figure 12 for Figure 9 A magnified structural view of part III.

[0027] Among them, 1. support frame, 2. test bench, 3. inflatable density measuring mechanism, 4. sliding adjustment assembly, 5. sliding frame, 6. inflation channel, 7. inflation valve, 8. clamping assembly, 9. threaded hole, 10. clamping bolt, 11. clamping arc plate, 12. discharge type pressure measuring mechanism, 13. tip release assembly, 14. discharge frame, 15. discharge tip, 16. insulation cover, 17. outer drum assembly, 18. guide plate, 19. vent, 20. guide tube, 21. push plate, 22. insulation channel, 23. superelastic alloy strip, 24. mutual abutment plate, 25. soft magnetic strip, 26. electromagnetic column, 27. pressure measuring assembly, 28. conductive copper strip, 29. pressure measuring seat, 30. pressure measuring meter, 31. pressure measuring cable, 32. controller, 33. pressure sensor.

[0028] The accompanying drawings are used to provide further understanding of the present solution and constitute a part of the specification. Together with the embodiments of the present solution, they are used to explain the present solution and do not constitute a limitation to the present solution. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of this solution will be clearly and completely described below in conjunction with the drawings in the embodiments of this solution. Obviously, the described embodiments are only part of the embodiments of this solution, not all of the embodiments; based on the embodiments in this solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this solution.

[0030] In the description of this solution, it should be understood that terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this solution.

[0031] like Figures 1-12 As shown, the insulating sleeve sealing detection device for an inflatable cabinet proposed in this scheme includes a support frame 1, a test bench 2, an inflatable density measuring mechanism 3 and a discharge type pressure measuring mechanism 12, the test bench 2 is arranged on the upper wall of the support frame 1, the inflatable density measuring mechanism 3 is arranged on the upper wall of the test bench 2, the discharge type pressure measuring mechanism 12 is arranged on the outside of the inflatable density measuring mechanism 3, the inflatable density measuring mechanism 3 includes a sliding component 4 and a clamping component 8, the sliding component 4 is arranged on the upper wall of the test bench 2, the clamping component 8 is arranged on the side wall of the sliding component 4, the discharge type pressure measuring mechanism 12 includes a tip release component 13, an outer drum component 17 and a pressure measuring component 27, the tip release component 13 is arranged on the outside of the sliding component 4, the outer drum component 17 is arranged inside the sliding component 4, and the pressure measuring component 27 is arranged at the end of the sliding component 4 away from the tip release component 13.

[0032] The sliding adjustment component 4 includes a sliding frame 5, an inflation channel 6, an inflation valve 7 and a pressure sensor 33. The sliding frame 5 is symmetrically arranged on the upper walls at both ends of the test bench 2. The sliding frame 5 is slidingly connected to the test bench 2. The inflation channel 6 is arranged on the inner wall of the sliding frame 5. The inflation valve 7 is connected to the upper wall of one end of the inflation channel 6. The pressure sensor 33 is arranged on the inner wall of the inflation channel 6 close to the inflation valve 7; the clamping component 8 includes a threaded hole 9, a clamping bolt 10 and a clamping arc plate 11. The threaded holes 9 are symmetrically arranged on both sides of the sliding frame 5. The clamping bolt 10 is arranged inside the threaded hole 9. The clamping bolt 10 is threadedly connected to the threaded hole 9. The clamping arc plate 11 is rotatably arranged on the side of the clamping bolt 10 close to the sliding frame 5, and the clamping arc plates 11 are relatively arranged.

[0033] The tip discharge assembly 13 includes a discharge frame 14, a discharge tip 15 and an insulating cover 16. The discharge frame 14 is arranged at the end of the sliding frame 5 away from the inflation valve 7. Multiple groups of the discharge tips 15 are arranged on the inner wall of the discharge frame 14, and the insulating cover 16 is arranged on the outside of the discharge frame 14; the outer drum assembly 17 includes a guide plate 18, a vent 19, a guide tube 20, a push plate 21, an insulating channel 22, a superelastic alloy strip 23, a mutual abutment plate 24, a soft magnetic strip 25 and an electromagnetic column 26. The guide plate 18 is slidably arranged on the inner wall of the inflation channel 6, multiple groups of the vent 19 are arranged on the side wall of the guide plate 18, the guide tube 20 passes through the sliding frame 5 and is arranged on the side wall of the guide plate 18, the guide tube 20 is slidably connected to the sliding frame 5, the push plate 21 is arranged on the side of the guide tube 20 away from the guide plate 18, and the insulating channel 22 is arranged on the inner wall of the guide tube 20 , multiple groups of superelastic alloy strips 23 are arranged on the side of the guide plate 18 away from the guide tube 20, the mutual abutment plate 24 is arranged on the side of the superelastic alloy strip 23 away from the guide plate 18, the soft magnetic strip 25 is arranged on the inner wall of the superelastic alloy strip 23, the electromagnetic column 26 is arranged on the side wall of the mutual abutment plate 24 inside the superelastic alloy strip 23, and the soft magnetic strip 25 and the electromagnetic column 26 are arranged opposite to each other; the pressure measuring assembly 27 includes a conductive copper strip 28, a pressure measuring seat 29, a pressure measuring meter 30 and a pressure measuring cable 31, the conductive copper strip 28 is arranged on the side of the superelastic alloy strip 23 away from the soft magnetic strip 25, the pressure measuring seat 29 is arranged on the side of the sliding frame 5 close to the inflation channel 6, the pressure measuring meter 30 is arranged on the side of the pressure measuring seat 29 away from the sliding frame 5, and the pressure measuring cable 31 passes through the guide tube 20 and is arranged between the pressure measuring end of the pressure measuring meter 30 and the conductive copper strip 28.

[0034] A controller 32 is provided on the side wall of the support frame 1 .

[0035] The controller 32 is electrically connected to the electromagnetic column 26 and the pressure sensor 33 respectively.

[0036] During specific use, manually pull the sliding frame 5, the sliding frame 5 slides back to back along the upper wall of the test bench 2, the distance between the inflation channels 6 increases, the insulating sleeve to be tested is placed between the inflation channels 6, and manually push the sliding frame 5, the sliding frame 5 slides relatively along the upper wall of the test bench 2, the inflation channels 6 are respectively inserted into the two ends of the insulating sleeve, and the insulating covers 16 fit each other. Then, the clamping bolt 10 is rotated, and the clamping bolt 10 rotates along the threaded hole 9 to drive the clamping arc plate 11 close to the inflation channel 6, and the clamping arc plate 11 squeezes and fixes the insulating sleeve on the outside of the inflation channel 6;

[0037] Open the inflation valve 7, and the operator fills air into the inflation channel 6 through the inflation valve 7 to perform a quantitative inflation test on the insulating sleeve. The controller 32 controls the pressure sensor 33 to start. The pressure sensor 33 monitors the air pressure filled into the insulating sleeve in real time through the detection end, thereby detecting whether there is a leakage in the insulating sleeve. The quantitative inflation test mainly relies on the pressure decay rate to judge the leakage, but the sensitivity to small leaks is insufficient. At this time, the push plate 21 is pushed. In the initial state, the mutual resistance plate 24 is placed beside the inflation channel 6. The push plate 21 drives the guide plate 18 to slide along the inner wall of the inflation channel 6 through the guide tube 20. The guide plate 18 drives the mutual resistance plate 24 to move relative to each other through the superelastic alloy strip 23. As the length of the guide tube 20 extending into the inflation channel 6 increases, the mutual resistance plates 24 fit together.

[0038] The controller 32 controls the electromagnetic column 26 to start. When the electromagnetic column 26 is energized, a magnetic field is generated between the electromagnetic column 26 and the soft magnetic strip 25. The electromagnetic column 26 and the soft magnetic strip 25 are arranged with the same polarity. After the mutual abutment plate 24 is attached, the guide tube 20 is continued to be pushed. The guide tube 20 squeezes the superelastic alloy strip 23, causing it to bend. Under the force of the magnetic field with the same polarity as the electromagnetic column 26 and the soft magnetic strip 25, the superelastic alloy strip 23 protrudes toward one side of the inner wall of the insulating sleeve. The superelastic alloy strip 23 drives the conductive copper strip 28 to approach the discharge tip 15. The distance between the discharge tip 15 and the conductive copper strip 28 is greater than the distance between the discharge tips 15. The discharge tips 15 are energized by an external power supply device. The voltage between the discharge tips 15 is the same, and the probability of discharge between them is small.

[0039] There is a large potential difference between the discharge tip 15 and the conductive copper strip 28. When a tiny hole appears in the insulating sleeve, the discharge from the discharge tip 15 can penetrate the tiny leakage hole and connect to the conductive copper strip 28 inside the insulating sleeve. The pressure meter 30 monitors the charged condition inside the conductive copper strip 28 in real time through the pressure measuring cable 31. When the pressure measurement data of the pressure measuring meter 30 changes, the discharge from the discharge tip 15 is conducted into the conductive copper strip 28, and there is a leakage in the insulating sleeve. Repeat the above operation for the next use.

[0040] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0041] The above description of the present solution and its implementation methods is non-limiting. The drawings show only one implementation method of the present solution, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present solution, designs a similar structure and embodiment without creatively designing, they shall fall within the scope of protection of the present solution.

Claims

1. An insulating sleeve sealing detection device for an inflatable cabinet includes a support frame and a test bench, and is characterized by: It also includes an inflatable density measuring mechanism and a discharge type pressure measuring mechanism, wherein the test bench is arranged on the upper wall of the support frame, the inflatable density measuring mechanism is arranged on the upper wall of the test bench, and the discharge type pressure measuring mechanism is arranged outside the inflatable density measuring mechanism; The inflatable density measuring mechanism includes a sliding component and a clamping component; The sliding assembly is arranged on the wall of the test bench, and the clamping assembly is arranged on the side wall of the sliding assembly; The discharge type pressure measuring mechanism comprises a tip discharge component, an outer drum component and a pressure measuring component; The tip-amplifying assembly is arranged outside the sliding assembly, the outer drum assembly is arranged inside the sliding assembly, and the pressure measuring assembly is arranged at one end of the sliding assembly away from the tip-amplifying assembly; The sliding adjustment assembly includes a sliding frame and an air charging channel; The sliding frames are symmetrically arranged on the upper walls at both ends of the test bench, the sliding frames are slidably connected to the test bench, and the inflation channel is arranged on the inner wall of the sliding frame; The outer drum assembly includes a guide plate, a vent, a guide tube, a push plate, an insulating channel, a superelastic alloy strip, a mutual abutment plate, a soft magnetic strip and an electromagnetic column; The guide plate is slidingly arranged on the inner wall of the inflation channel, multiple groups of the vents are arranged on the side wall of the guide plate, the guide tube passes through the sliding frame arranged on the side wall of the guide plate, the guide tube is slidably connected to the sliding frame, the push plate is arranged on the side of the guide tube away from the guide plate, the insulating channel is arranged on the inner wall of the guide tube, multiple groups of the superelastic alloy strips are arranged on the side of the guide plate away from the guide tube, the mutual resistance plate is arranged on the side of the superelastic alloy strip away from the guide plate, the soft magnetic strip is arranged on the inner wall of the superelastic alloy strip, the electromagnetic column is arranged on the side wall of the mutual resistance plate inside the superelastic alloy strip, and the soft magnetic strip and the electromagnetic column are arranged opposite to each other.

2. The insulating sleeve sealing detection device for an inflatable cabinet according to claim 1 is characterized in that: The sliding adjustment component further includes an inflation valve and a pressure sensor. The inflation valve is connected to an upper wall at one end of the inflation channel, and the pressure sensor is arranged on an inner wall at one end of the inflation channel close to the inflation valve.

3. The insulating sleeve sealing detection device for an inflatable cabinet according to claim 1, characterized in that: The clamping assembly includes a threaded hole, a clamping bolt and a clamping arc plate. The threaded holes are symmetrically arranged on both sides of the sliding frame. The clamping bolt is arranged inside the threaded hole. The clamping bolt is threadedly connected to the threaded hole. The clamping arc plate is rotatably arranged on the side of the clamping bolt close to the sliding frame, and the clamping arc plates are relatively arranged.

4. The insulating sleeve sealing detection device for an inflatable cabinet according to claim 2, characterized in that: The tip discharge assembly includes a discharge frame, a discharge tip and an insulating cover. The discharge frame is arranged on one end of the sliding frame away from the inflation valve. Multiple groups of the discharge tips are arranged on the inner wall of the discharge frame. The insulating cover is arranged on the outer side of the discharge frame.

5. The insulating sleeve sealing detection device for an inflatable cabinet according to claim 1, characterized in that: The pressure measuring assembly includes a conductive copper bar, a pressure measuring seat, a pressure measuring meter and a pressure measuring cable. The conductive copper bar is arranged on the side of the superelastic alloy bar away from the soft magnetic bar, the pressure measuring seat is arranged on the side of the sliding frame close to the inflation channel, the pressure measuring meter is arranged on the side of the pressure measuring seat away from the sliding frame, and the pressure measuring cable passes through the guide tube and is arranged between the pressure measuring end of the pressure measuring meter and the conductive copper bar.

6. The insulating sleeve sealing detection device for an inflatable cabinet according to claim 1, characterized in that: A controller is provided on the side wall of the support frame.

7. The insulating sleeve sealing detection device for an inflatable cabinet according to claim 6, characterized in that: The controller is electrically connected to the electromagnetic column and the pressure sensor respectively.

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