A switchgear with an on-line partial discharge monitoring structure and its monitoring method

Abstract

The present invention discloses a switch cabinet with an on-line partial discharge monitoring structure and a monitoring method thereof, which relates to the technical field of switch cabinet monitoring, and includes a main body, a partition board, a plurality of busbars, a plurality of temperature monitoring components, a plurality of gas monitoring components and a plurality of buzzer alarms. The upper part of the main body is fixedly connected to the partition board. The temperature monitoring component includes a first housing, the lower end of the first housing is fixedly connected to the upper end of the partition board, the inner cavity of the first housing is filled with a thermal expansion medium, and a heat conducting wire is fixedly connected to the middle of the first housing. In the present invention, when the pressure in the inner cavity of the first housing is greater than the gravity of the second piston, it can push the second piston to move towards the side away from the first housing, thereby pushing the second piston to apply a force to the key switch installed at the upper end of the second connecting plate, and can control the corresponding buzzer alarm to operate and emit a buzzer alarm, so as to remind the staff that the busbar at this position has a continuous partial discharge phenomenon.

Description

Technical Field

[0001] The present invention relates to the technical field of switchgear monitoring, and particularly relates to a switchgear with an on-line partial discharge monitoring structure and a monitoring method thereof. Background Art

[0002] Partial discharge refers to a non-penetrating discharge phenomenon that occurs in some areas of the insulation system of electrical equipment due to uneven electric field distribution or defects inside the insulating material. Although this phenomenon is small in scale, its long-term existence will gradually erode the insulating material, accelerate equipment aging, and may even cause insulation breakdown, posing a serious threat to the safe and stable operation of the power system. In the power system, as a key power distribution device, the internal structure design of the switchgear is crucial. Among them, the busbar chamber is usually carefully arranged at the upper part of the back of the switchgear for installing and supporting high-voltage busbars. As the "main artery" for power transmission, the operating state of the busbar is directly related to the stability and efficiency of the entire power system. However, during the operation of the busbar, due to factors such as uneven electric field intensity distribution, accumulation of busbar surface dirt, aging of insulating materials, or manufacturing defects, partial discharge phenomena may be triggered.

[0003] Busbar partial discharge will not only lead to a decline in insulation performance, but may also cause arc discharge, causing serious damage to the busbar and the surrounding equipment. More seriously, the heat and electromagnetic radiation generated by partial discharge may also accelerate equipment aging, shorten the service life of the equipment, and even trigger serious accidents such as fires or explosions. Therefore, it is crucial to monitor and warn of busbar partial discharge in real time.

[0004] The existing switchgear partial discharge detection technology is that the staff uses a hand-held switchgear partial discharge detector to detect the ultrasonic discharge signal of the switchgear according to the established standard operation procedure. There are obvious deficiencies during the test: when the test point is relatively high, the tester needs to carry an insulating ladder, and working at heights not only increases the risk of work but also has low detection efficiency.

[0005] In the prior art, a Chinese patent for a convenient-to-use partial discharge monitoring device for switchgear (publication number: CN115166447B) is proposed to solve the above-mentioned existing technical problems. The technical solution disclosed in this patent document is as follows: "It includes a mobile trolley, a storage battery, a wire winding mechanism, a walking detection mechanism, a PLC controller, and a display. A box body is provided on the mobile trolley, and a storage battery, a wire winding mechanism, and a PLC controller are provided inside the box body. The storage battery, the wire winding mechanism, and the display are all electrically connected to the PLC controller. The walking detection mechanism is electrically connected to the PLC controller through a wire wound on the wire winding mechanism. The wire winding mechanism includes an automatic wire winder and a wire feeding device. The wire feeding device is used to pull out the wire wound on the automatic wire winder and convey the pulled-out wire back to the automatic wire winder. The walking detection mechanism includes two walking mechanisms, a sliding driving mechanism, and a discharge detection sensor". In this solution, support mechanisms are provided on both walking mechanisms, a sliding driving mechanism is provided between the two walking mechanisms, a discharge detection sensor is provided on the sliding driving mechanism, a walking belt is provided on the walking driving mechanism, and magnets are embedded in the walking belt at intervals. By driving the discharge detection sensor to move along the height direction of the switchgear through the walking mechanism, the risk of operators falling can be avoided, and the detection efficiency can be improved; through the cooperation of the automatic wire winder (31) and the wire feeding device for wire releasing and wire retracting, manual operation is not required, the manual workload is reduced, it is convenient to use, and the wire dragging on the ground can be avoided. However, this method still relies on manual inspection. However, this monitoring method has limitations. Specifically, the busbar chamber is usually arranged at the upper part of the back of the switchgear, and this position is relatively hidden, which brings challenges to the monitoring work. More complicated is that during the normal operation of the switchgear, the temperature in the busbar chamber often rises accordingly, and this temperature change is extremely likely to interfere with the monitoring results, resulting in frequent false alarms. Therefore, when partial discharge actually occurs, it is often difficult for manual inspection to quickly and accurately locate the specific discharge point. This situation not only affects the monitoring efficiency but also brings inconvenience to the timely maintenance and fault troubleshooting of the equipment. Summary of the Invention

[0006] The purpose of the present invention is to provide a switchgear with a partial discharge on-line monitoring structure and its monitoring method to solve the problem that during the normal operation of the switchgear, the temperature in the busbar chamber often rises accordingly, and this temperature change is extremely likely to interfere with the monitoring results, resulting in frequent false alarms, so that when partial discharge actually occurs, it is often difficult for manual inspection to quickly and accurately locate the specific discharge point.

[0007] To solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A switchgear cabinet with an on-line partial discharge monitoring structure, comprising a main body, a partition board, a plurality of busbars, a plurality of temperature monitoring components, a gas monitoring component and a plurality of buzzer alarms. The upper part of the main body is fixedly connected to the partition board; the temperature monitoring component includes a first housing. The lower end of the first housing is fixedly connected to the upper end of the partition board. The inner cavity of the first housing is filled with a thermal expansion medium. A heat conducting wire is fixedly connected to the middle of the first housing. A heat conducting sheet is fixedly connected to the side of the heat conducting wire close to the busbar, and the heat conducting sheet is in close contact with the outer surface of the adjacent busbar.

[0009] A first gas branch pipe is fixedly connected to the side of the first housing away from the busbar, and the inner cavity of the first gas branch pipe is communicated with the inner cavity of the first housing. A first piston is slidably connected to the inner cavity of the first gas branch pipe. A sealing plate is fixedly connected to the middle of the inner cavity of the first gas branch pipe. The first piston is slidably connected to the sealing plate. A liquid is filled in the side of the inner cavity of the first gas branch pipe away from the first housing. A second gas branch pipe is fixedly connected to one side of the upper part of the first housing, and the inner cavity of the second gas branch pipe is communicated with the inner cavity of the first housing. A second piston is slidably connected to the middle of the second gas branch pipe. A second connecting plate is fixedly connected to the side of the upper end of the first housing close to the second gas branch pipe.

[0010] A plurality of buzzer alarms are fixedly connected to one side of the upper part of the main body. A collecting component is arranged on one side of the upper part of the main body for storing waste gas. A driving component is arranged on one side of the upper part of the main body for providing power when the gas monitoring component extracts gas. The gas monitoring component close to the partition board is fixedly connected to the partition board, and the gas monitoring component far from the partition board is fixedly connected to the upper part of the main body.

[0011] By adopting the above technical solution, a thermal expansion medium is filled in the inner cavity of the first housing. The thermal expansion medium can be anhydrous methanol liquid or anhydrous acetone liquid. When continuous partial discharge occurs in the busbar, electrical energy is released in the form of heat, resulting in a rapid increase in the temperature of the busbar in a short time. Then, the heat conducting sheet is used to transfer the heat energy to the heat conducting wire, and the heat conducting wire is used to transfer the heat to the inner cavity of the first housing, quickly heating the thermal expansion medium filled in the inner cavity of the first housing, causing the thermal expansion medium to expand rapidly, resulting in an increase in the pressure in the inner cavity of the first housing. Then, under the action of the pressure, the first piston will be pushed to move towards the side away from the busbar. However, since the small holes opened on the first piston are relatively small, the liquid filled in the inner cavity of the first gas branch pipe cannot flow through the small holes quickly, resulting in a slow movement speed of the first piston. The continuous heating of the thermal expansion medium in the inner cavity of the first housing causes the pressure in the inner cavity of the first housing to increase continuously. Then, when the pressure in the inner cavity of the first housing is greater than the gravity of the second piston, the second piston can be pushed to move towards the side away from the first housing, thereby pushing the second piston to exert a force on the key switch installed at the upper end of the second connecting plate, and controlling the corresponding buzzer alarm to operate and emit a beeping alarm, so as to remind the staff that continuous partial discharge occurs in the busbar at this position.

[0012] A further improvement of the technical solution of the present invention lies in that: the gas monitoring component includes a second housing. In the middle of the second housing, a detection tube is fixedly connected. The detection tube penetrates through the side of the adjacent baffle away from the busbar and extends to the side of the baffle close to the busbar. On the side of the second housing close to the busbar, an ozone detection sensor is fixedly connected. And the detection end of the ozone detection sensor sequentially penetrates through the end face of the second housing and the outer surface of the detection tube and extends into the inner cavity of the detection tube. On the side of the detection tube away from the busbar, an air delivery pipe one is fixedly connected. The side of the air delivery pipe one away from the busbar penetrates through the inner cavity of the second housing and extends to the outer surface of the second housing. A piston three is slidably connected in the inner cavity of the detection tube. On the side of the detection tube close to the busbar, a mounting block is fixedly connected. In the middle of the mounting block, a one-way valve one is fixedly connected.

[0013] A further improvement of the technical solution of the present invention lies in that: several ultraviolet lamps are fixedly connected in the inner cavity of the second housing. The detection tube is made of transparent glass material.

[0014] A further improvement of the technical solution of the present invention lies in that: an air delivery and separation tube is fixedly connected to one side of the second housing. And the side of the air delivery and separation tube close to the detection tube sequentially penetrates through the end face of the second housing and the outer surface of the detection tube and extends into the inner cavity of the detection tube. A one-way valve two is fixedly connected to the side of the inner cavity of the air delivery and separation tube close to the detection tube.

[0015] A further improvement of the technical solution of the present invention lies in that: several semi-closed components are arranged at the upper end of the main body. The semi-closed components include two support plates one and two baffles. The lower ends of the two support plates one are fixedly connected to the upper end of the partition board. Both of the two support plates one are symmetrically and fixedly connected with guide rods. Spring one is wound and connected to the outer surface of each guide rod. In the inner cavities of both of the two support plates one, sliders are symmetrically and slidably connected. The guide rods on the same side are slidably connected with the sliders. The side of spring one close to the slider on the same side is fixedly connected with the slider. The side of spring one away from the slider on the same side is fixedly connected with the inner wall of the support plate one. The upper ends of the baffles are fixedly connected to the lower ends of the adjacent two sliders. There is a certain gap between the upper parts of the two baffles and the busbar. The side of the heat conducting wire close to the busbar is slidably connected with the adjacent baffle.

[0016] A further improvement of the technical solution of the present invention lies in that: the driving component includes an air pump and two pneumatic integrated valves. The air pump is fixedly connected to the main body. The pneumatic integrated valves are fixedly connected to the main body. The output end of the air pump is fixedly connected with an air delivery pipe three. The air inlet holes of the two pneumatic integrated valves are jointly fixedly connected with a shunt pipe. The shunt pipe is fixedly connected with the air delivery pipe three. The air outlet holes of the pneumatic integrated valves are all fixedly connected with air delivery pipes four. The output ends of the air delivery pipes four are fixedly connected with the input ends of the adjacent air delivery pipe one.

[0017] A further improvement of the technical solution of the present invention lies in that: the collection component includes a third connecting plate, a number of second springs and a number of storage tubes. The third connecting plate is fixedly connected to the main body. A number of second air pipes are fixedly connected to the middle of the third connecting plate. Second support plates are symmetrically and fixedly connected to the upper end of the third connecting plate. Clamping plates are fixedly connected to one side of the second springs close to the storage tubes. The other sides of the second springs far from the storage tubes are fixedly connected to the adjacent second support plates. The input ends of the second air pipes are fixedly connected to the output ends of the adjacent separation pipes.

[0018] A further improvement of the technical solution of the present invention lies in that: the heat conducting sheet is set in a U shape, and the heat conducting wire is arranged in a spiral shape in the inner cavity of the first shell.

[0019] The present invention also provides a method for monitoring partial discharge of a switch, including the following steps:

[0020] S1. Push the slider to slide towards the busbar by the elastic force of the first spring, drive the shielding plate to slide towards the busbar, and form a semi-closed space;

[0021] S2. Rapidly heat up the thermal expansion medium in the inner cavity of the first shell to evaporate it, and then push the second piston to slide towards the second connecting plate in the inner cavity of the second branch pipe;

[0022] S3. The air pump operates to extract the gas in the inner cavity of the third air pipe, then drive the gas in the inner cavity of the fourth air pipe to flow, then drive the gas in the inner cavities of the first air pipe and the detection pipe to flow, drive the third piston to move towards the side away from the busbar, and drive the detection pipe to extract the gas in the inner cavity of the semi-closed component;

[0023] S4. By operating the ultraviolet lamp, accelerate the conversion of nitric oxide and nitrogen dioxide in the inner cavity of the detection pipe into ozone, then detect it with an ozone detection sensor. At the same time, transmit the detection data to the data center for comparison to determine whether the busbar at this position has continuous partial discharge;

[0024] S5. By operating the air pump, use the air pump to transport gas into the inner cavity of the third air pipe, push the gas in the inner cavity of the fourth air pipe and the gas in the inner cavity of the first air pipe to flow into the inner cavity of the detection pipe, push the third piston to slide towards the busbar, and push the exhausted gas detected in the inner cavity of the detection pipe into the inner cavity of the separation pipe, and transport the exhausted gas to the inner cavity of the storage tube through the second air pipe;

[0025] Due to the adoption of the above technical solution, the technical progress achieved by the present invention compared with the prior art is:

[0026] 1. The present invention provides a switchgear cabinet with an on-line partial discharge monitoring structure and its monitoring method. When continuous partial discharge occurs in the busbar, electrical energy is released in the form of heat, causing the temperature of the busbar to rise rapidly within a short period of time. Then, the heat energy is transferred to the heat-conducting wire by the heat-conducting sheet, and the heat is transported to the inner cavity of the first housing by the heat-conducting wire, rapidly heating the thermal expansion medium filled in the inner cavity of the first housing, causing the thermal expansion medium to expand rapidly, resulting in an increase in pressure in the inner cavity of the first housing. Then, under the action of the pressure, the first piston is pushed to move towards the side away from the busbar. However, since the small holes opened on the first piston are relatively small, the liquid filled in the inner cavity of the first gas pipe cannot flow through the small holes quickly for commutation, resulting in a slow movement speed of the first piston. The continuous heating of the thermal expansion medium in the inner cavity of the first housing causes the pressure in the inner cavity of the first housing to increase continuously. Then, when the pressure in the inner cavity of the first housing is greater than the gravity of the second piston, the second piston can be pushed to move towards the side away from the first housing, thereby pushing the second piston to apply a force to the key switch installed at the upper end of the second connecting plate, and the corresponding buzzer alarm can be controlled to operate and emit a buzzer alarm, so as to remind the staff that continuous partial discharge occurs in the busbar at this position.

[0027] 2. The present invention provides a switchgear cabinet with an on-line partial discharge monitoring structure and its monitoring method. When partial discharge occurs in the busbar, in addition to rapidly increasing the temperature within a short period of time, ozone and nitrogen oxides are also generated. By forming a semi-closed space below the busbar, ozone and nitrogen oxides can be accumulated in this semi-closed space, preventing the short-term outward diffusion of ozone and nitrogen oxides, resulting in a decrease in the concentration of ozone and nitrogen oxides generated at the position where partial discharge occurs in the busbar, thus affecting the sampling detection results of the gas monitoring component and improving the detection accuracy.

[0028] 3. The present invention provides a switchgear cabinet with an on-line partial discharge monitoring structure and its monitoring method. By fixedly connecting a number of ultraviolet lamps in the inner cavity of the second housing, the gas in the inner cavity of the detection tube can be irradiated by the ultraviolet rays generated during the operation of the ultraviolet lamps. Nitric oxide and nitrogen dioxide will be accelerated to convert into ozone under the irradiation of ultraviolet rays, and then the concentration of ozone in the inner cavity of the detection tube can be enhanced. Then, the ozone in the inner cavity of the detection tube can be monitored by the ozone detection sensor, and the monitoring result can be transmitted to the data center at the same time. Then, the data transmitted by the ozone detection sensors at different heights at the same position are compared by the data center, and then it is judged whether continuous partial discharge occurs in the busbar at this position. By comparing the different data at the detection location and then making a comparison, the accuracy of the detection result can be further improved.

[0029] 4. The present invention provides a switch cabinet with a partial discharge on-line monitoring structure and its monitoring method. The detection tube is made of transparent glass material, so that the ultraviolet rays generated during the operation of the ultraviolet lamp can irradiate the gas in the inner cavity of the detection tube, which can improve the irradiation efficiency, and can increase the speed at which nitric oxide and nitrogen dioxide are converted into ozone under the irradiation of ultraviolet rays, and then shorten the waiting time required for detection and improve the response speed of on-line monitoring of the device.

[0030] 5. The present invention provides a switch cabinet with a partial discharge on-line monitoring structure and its monitoring method. By setting the heat conducting sheet in a U shape, the contact area between the heat conducting sheet and the busbar can be enhanced. Then, when partial discharge occurs in the busbar, the generated temperature can be quickly transferred to the heat conducting sheet, and then the heat conducting sheet is used to convey the temperature to the heat conducting wire. By setting the heat conducting wire in a spiral shape, the contact area between the heat conducting wire and the thermal expansion medium can be increased, so that the thermal expansion medium can absorb heat more quickly, and then it can be quickly heated and expanded, thereby improving its response sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] Figure 1 Schematic diagram of the overall structure of the present invention Figure 1 ;

[0033] Figure 2 Schematic diagram of the overall structure of the present invention Figure 2 ;

[0034] Figure 3 Schematic diagram of the overall structure of the present invention Figure 3 ;

[0035] Figure 4 Schematic diagram of the partial structure of the present invention Figure 1 ;

[0036] Figure 5 Schematic diagram of the partial structure of the present invention Figure 2 ;

[0037] Figure 6 Schematic diagram of the temperature monitoring component of the present invention Figure 1 ;

[0038] Figure 7 Schematic diagram of the temperature monitoring component of the present invention Figure 2 ;

[0039] Figure 8 Schematic diagram of the gas monitoring component of the present invention Figure 1 ;

[0040] Figure 9 Schematic diagram of the gas monitoring component of the present inventionFigure 2 ;

[0041] Figure 10 Schematic diagram of the gas monitoring component of the present invention Figure 3 ;

[0042] Figure 11 Schematic diagram of the drive component of the present invention Figure 1 ;

[0043] Figure 12 Schematic diagram of the drive component of the present invention Figure 2 ;

[0044] Figure 13 Schematic diagram of the collection component of the present invention Figure 1 ;

[0045] Figure 14 Schematic diagram of the collection component of the present invention Figure 2 ;

[0046] Figure 15 Schematic diagram of the semi - enclosed component of the present invention;

[0047] Figure 16 Enlarged schematic diagram of part A of the semi - enclosed component of the present invention.

[0048] In the figure: 1. Main body; 11. Partition board; 2. Bus bar; 3. Temperature monitoring component; 31. Outer shell one; 32. Heat conducting wire; 33. Heat conducting sheet; 34. Branch gas pipe one; 35. Piston one; 36. Sealing plate; 37. Branch gas pipe two; 38. Piston two; 39. Connecting plate two; 4. Semi - enclosed component; 41. Support plate one; 42. Guide rod; 43. Slide block; 44. Spring one; 45. Shutter; 5. Gas monitoring component; 51. Outer shell two; 52. Ozone detection sensor; 53. Transfer pipe; 54. Detection pipe; 541. Mounting block; 542. Check valve one; 55. Gas transmission pipe one; 56. Piston three; 57. Check valve two; 58. Ultraviolet lamp; 6. Collection component; 61. Connecting plate three; 62. Gas transmission pipe two; 63. Support plate two; 64. Spring two; 65. Clamp; 66. Storage pipe; 7. Buzzer alarm; 8. Drive component; 81. Air pump; 82. Gas transmission pipe three; 83. Shunt pipe; 84. Pneumatic integrated valve; 85. Gas transmission pipe four. Detailed implementation manners

[0049] The present invention will be further described in detail below in conjunction with embodiments:

[0050] Embodiment 1

[0051] As Figures 1 - 7As shown in the figure, the present invention provides a switch cabinet with an on-line partial discharge monitoring structure, including a main body 1, a partition 11, a plurality of busbars 2, a plurality of temperature monitoring components 3, a gas monitoring component 5 and a plurality of buzzer alarms 7. The upper part of the main body 1 is fixedly connected to the partition 11; the temperature monitoring component 3 includes an outer shell 31. The lower end of the outer shell 31 is fixedly connected to the upper end of the partition 11. The inner cavity of the outer shell 31 is filled with a thermal expansion medium. A heat conduction wire 32 is fixedly connected to the middle of the outer shell 31. A heat conduction sheet 33 is fixedly connected to the side of the heat conduction wire 32 close to the busbar 2. The heat conduction sheet 33 is in close contact with the outer surface of the adjacent busbar 2;

[0052] A first gas branch pipe 34 is fixedly connected to the side of the outer shell 31 far from the busbar 2, and the inner cavity of the first gas branch pipe 34 is communicated with the inner cavity of the outer shell 31. A first piston 35 is slidably connected to the inner cavity of the first gas branch pipe 34. A sealing plate 36 is fixedly connected to the middle of the inner cavity of the first gas branch pipe 34. The first piston 35 is slidably connected to the sealing plate 36. A liquid is filled in the side of the inner cavity of the first gas branch pipe 34 far from the outer shell 31. A second gas branch pipe 37 is fixedly connected to one side of the upper part of the outer shell 31, and the inner cavity of the second gas branch pipe 37 is communicated with the inner cavity of the outer shell 31. A second piston 38 is slidably connected to the middle of the second gas branch pipe 37. A second connecting plate 39 is fixedly connected to one side of the upper end of the outer shell 31 close to the second gas branch pipe 37;

[0053] A plurality of buzzer alarms 7 are fixedly connected to one side of the upper part of the main body 1. A collection component 6 is arranged on one side of the upper part of the main body 1. The collection component 6 is used for storing waste gas. A driving component 8 is arranged on one side of the upper part of the main body 1. The driving component 8 is used to provide power when the gas monitoring component 5 extracts gas. The gas monitoring component 5 close to the partition 11 is fixedly connected to the partition 11, and the gas monitoring component 5 far from the partition 11 is fixedly connected to the upper part of the main body 1.

[0054] In this embodiment, by filling a thermal expansion medium in the inner cavity of the outer shell, the inner cavity of the heat conduction sheet is in close contact with the outer surface of the busbar, and the side of the heat conduction wire close to the heat conduction sheet is fixedly connected to the heat conduction sheet. When the components inside the switch cabinet operate normally, the temperature inside the cabinet will gradually rise. Then, the heat energy is transferred to the heat conduction wire by the heat conduction sheet, and then the heat is transported to the inner cavity of the outer shell by the heat conduction wire to heat the thermal expansion medium filled in the inner cavity of the outer shell. Then, the thermal expansion medium in the inner cavity of the outer shell will gradually heat up and then gradually expand due to heat. Since the components inside the switch cabinet operate normally, the temperature rise rate inside the cabinet is slow, resulting in a slow expansion rate of the thermal expansion medium. Since small holes are opened in the first piston, the liquid filled in the inner cavity of the first gas branch pipe can flow through the two small holes, so when slowly pushing the first piston to move, the resistance received by the first piston is less than the gravity of the second piston, so that the first piston can be driven to move;

[0055] When a continuous partial discharge occurs in the busbar, electrical energy is released in the form of heat, causing the temperature of the busbar to rise rapidly within a short period of time. Then, the heat is transferred to the heat-conducting wire by the heat-conducting sheet, and the heat is transported to the inner cavity of the first housing by the heat-conducting wire, rapidly heating the thermal expansion medium filled in the inner cavity of the first housing, causing the thermal expansion medium to expand rapidly. Since the small holes opened in the first piston are relatively small, the liquid filled in the inner cavity of the first gas pipe cannot flow through the small holes quickly for commutation. Then, the resistance of the liquid on the first piston is greater than the gravity of the second piston. Since the first piston cannot move rapidly towards the side away from the first housing, the thermal expansion medium will move towards the second piston, and then be able to push the second piston towards the side away from the first housing, thereby being able to push the second piston to exert a force on the key switch installed at the upper end of the second connecting plate, being able to control the corresponding buzzer alarm to operate and emit a buzzer alarm, so as to be able to remind the staff that a continuous partial discharge phenomenon occurs in the busbar at this position.

[0056] Embodiment 2

[0057] As Figure 6 、 Figure 7 、 Figure 15 and Figure 16 shown, on the basis of Embodiment 1, the present invention provides a technical solution: Preferably, a plurality of semi-closed components 4 are arranged at the upper end of the main body 1. The semi-closed component 4 includes two first support plates 41 and two shielding plates 45. The lower ends of the two first support plates 41 are fixedly connected to the upper end of the partition plate 11. The two first support plates 41 are symmetrically and fixedly connected with guide rods 42. Spring coils 44 are wound around the outer surfaces of the guide rods 42. In the inner cavities of the two first support plates 41, sliding blocks 43 are symmetrically slidably connected. The guide rods 42 on the same side are slidably connected with the sliding blocks 43. The side of the spring coil 44 on the same side close to the sliding block 43 is fixedly connected to the sliding block 43, and the side of the spring coil 44 on the same side away from the sliding block 43 is fixedly connected to the inner wall of the first support plate 41. The upper ends of the shielding plates 45 are fixedly connected to the lower ends of the adjacent two sliding blocks 43. There is a certain gap between the upper parts of the two shielding plates 45 and the busbar 2. The side of the heat-conducting wire 32 close to the busbar 2 is slidably connected with the adjacent shielding plate 45;

[0058] The heat-conducting sheet 33 is arranged in a U shape, and the heat-conducting wire 32 is arranged in a spiral shape in the inner cavity of the first housing 31.

[0059] In this embodiment, the elastic force of the first spring 44 can push the slider 43 to slide in the inner cavity of the first support plate 41, and then drive the shutter 45 to slide towards the direction of the busbar 2. Thus, a semi-closed space can be formed by the cooperation of the first support plate 41 and the shutter 45. When the busbar 2 discharges continuously, the surface temperature of the busbar 2 accelerates to rise in a short time, and at the same time, ozone and nitrogen oxides are generated. By using the busbar 2 to form a semi-closed space, the speed of the high temperature, ozone and nitrogen oxides generated during the continuous partial discharge of the busbar 2 from spreading out can be slowed down;

[0060] By making the heat conduction sheet 33 closely fit with the surface of the busbar 2, the heat conduction sheet 33 can transfer heat energy to the heat conduction wire 32. Then, the heat conduction wire 32 is used to transport the heat to the inner cavity of the first housing 31, and the heat expansion medium filled in the inner cavity of the first housing 31 is quickly heated, so that its temperature can rise rapidly and then expand rapidly. Since the small holes opened on the first piston 35 are relatively small, the liquid filled in the inner cavity of the first gas distribution pipe 34 cannot flow through the small holes quickly for commutation. Then, the resistance of the liquid on the first piston 35 is greater than the gravity of the second piston 38. Since the first piston 35 cannot move quickly towards the side away from the first housing 31, the heat expansion medium will move towards the direction of the second piston 38, and then can push the second piston 38 to move towards the side away from the first housing 31. Thus, the second piston 38 can be pushed to apply a force to the key switch installed at the upper end of the second connecting plate 39, and the corresponding buzzer alarm 7 can be controlled to operate and emit a buzzer alarm, so as to remind the staff that the busbar 2 at this position has a continuous partial discharge phenomenon.

[0061] Embodiment 3

[0062] As Figures 8 - 12 shown, on the basis of Embodiment 2, the present invention provides a technical solution: Preferably, the driving assembly 8 includes an air pump 81 and two pneumatic integrated valves 84. The air pump 81 is fixedly connected to the main body 1, the pneumatic integrated valves 84 are fixedly connected to the main body 1. The output end of the air pump 81 is fixedly connected with a third air delivery pipe 82. The air inlets of the two pneumatic integrated valves 84 are commonly fixedly connected with a shunt pipe 83. The shunt pipe 83 is fixedly connected with the third air delivery pipe 82. The air outlets of the pneumatic integrated valves 84 are all fixedly connected with fourth air delivery pipes 85. The output ends of the fourth air delivery pipes 85 are fixedly connected with the input ends of the adjacent first air delivery pipes 55;

[0063] The gas monitoring component 5 includes a second housing 51. In the middle of the second housing 51, a detection tube 54 is fixedly connected. The detection tube 54 penetrates through the side of the adjacent baffle 45 away from the busbar 2 and extends to the side of the baffle 45 close to the busbar 2. On the side of the second housing 51 close to the busbar 2, an ozone detection sensor 52 is fixedly connected, and the detection end of the ozone detection sensor 52 sequentially penetrates through the end face of the second housing 51 and the outer surface of the detection tube 54 and extends into the inner cavity of the detection tube 54. On the side of the detection tube 54 away from the busbar 2, an air delivery pipe 55 is fixedly connected. The side of the air delivery pipe 55 away from the busbar 2 penetrates through the inner cavity of the second housing 51 and extends to the outer surface of the second housing 51. A piston 56 is slidably connected in the inner cavity of the detection tube 54. On the side of the detection tube 54 close to the busbar 2, a mounting block 541 is fixedly connected. In the middle of the mounting block 541, a one-way valve 542 is fixedly connected;

[0064] A plurality of ultraviolet lamps 58 are fixedly connected in the inner cavity of the second housing 51. The detection tube 54 is made of transparent glass material;

[0065] An air delivery tube 53 is fixedly connected to one side of the second housing 51. The side of the air delivery tube 53 close to the detection tube 54 sequentially penetrates through the end face of the second housing 51 and the outer surface of the detection tube 54 and extends into the inner cavity of the detection tube 54. A one-way valve 57 is fixedly connected to the side of the inner cavity of the air delivery tube 53 close to the detection tube 54.

[0066] In this embodiment, at the same time, the air pump 81 is operated. Then, the air pump 81 is used to extract the gas in the inner cavity of the air delivery pipe 83, and then it can drive the gas in the inner cavity of the air delivery pipe 85 to flow into the inner cavity of the air delivery pipe 83. At the same time, it will drive the gas in the inner cavities of the detection tube 54 and the air delivery pipe 55 to flow into the inner cavity of the air delivery pipe 85, so as to drive the piston 56 to slide in the inner cavity of the detection tube 54, and then drive the detection tube 54 to extract the gas in the inner cavity of the semi-closed component 4, and can extract the ozone, nitrogen oxides and other gases in the semi-closed space into the inner cavity of the detection tube 54. The detection tube 54 located above the main body 1 will extract the air above the busbar chamber into the inner cavity. By fixedly connecting a plurality of ultraviolet lamps 58 in the inner cavity of the second housing 51, the gas in the inner cavity of the detection tube 54 can be irradiated by the ultraviolet rays generated when the ultraviolet lamps 58 are operating. Nitric oxide and nitrogen dioxide will be accelerated to convert into ozone under the irradiation of ultraviolet rays, and then the concentration of ozone in the inner cavity of the detection tube 54 can be enhanced. Then, the ozone in the inner cavity of the detection tube 54 can be monitored by the ozone detection sensor 52, and at the same time, the monitoring result can be transmitted to the data center. Then, the data transmitted by the ozone detection sensors 52 at different heights at the same position are compared by the data center, and then it is judged whether the busbar 2 at this position has continuous partial discharge.

[0067] Embodiment 4

[0068] Such as Figure 13 And Figure 14As shown, on the basis of Embodiment 3, the present invention provides a technical solution: Preferably, the collection component 6 includes a third connecting plate 61, a number of second springs 64 and a number of storage tubes 66. The third connecting plate 61 is fixedly connected to the main body 1. A number of second air delivery tubes 62 are fixedly connected to the middle of the third connecting plate 61. Second support plates 63 are symmetrically and fixedly connected to the upper end of the third connecting plate 61. Clamping plates 65 are fixedly connected to one side of the second springs 64 close to the storage tubes 66. The other sides of the second springs 64 away from the storage tubes 66 are fixedly connected to the adjacent second support plates 63. The input ends of the second air delivery tubes 62 are fixedly connected to the output ends of the adjacent separation tubes 53.

[0069] In this embodiment, then by operating the air pump 81, the air pump 81 conveys gas into the inner cavity of the third air delivery tube 82, and then can push the gas in the inner cavity of the fourth air delivery tube 85 and the gas in the inner cavity of the first air delivery tube 55 into the inner cavity of the detection tube 54, and then apply a force to the third piston 56, so as to be able to push the third piston 56 to slide in the direction of the bus bar 2, and can convey the waste gas in the inner cavity of the detection tube 54 into the inner cavity of the separation tube 53. Since the upper separation tube 53 is not connected to the second air delivery tube 62, the waste gas located in the upper part is directly discharged back into the bus bar chamber. The lower separation tube 53 is connected to the second air delivery tube 62, so that these waste gases will be conveyed into the inner cavity of the storage tube 66 through the second air delivery tube 62, avoiding the pollution of these waste gases to the surrounding environment. Then the staff can replace the storage tube 66 and process the collected waste gas.

[0070] A method for monitoring partial discharge of a switch cabinet includes the following steps:

[0071] S1. Push the slider 43 to slide in the direction of the bus bar 2 through the elastic force of the first spring 44, drive the shutter 45 to slide in the direction of the bus bar 2, and form a semi-closed space;

[0072] The bus bar 2 discharges continuously, the surface temperature of the bus bar 2 rises rapidly in a short time, and at the same time ozone and nitrogen oxides are generated. Then, the elastic force of the first spring 44 can be used to push the slider 43 to slide in the inner cavity of the first support plate 41, and then drive the shutter 45 to slide in the direction of the bus bar 2, so that a semi-closed space can be formed by the cooperation of the first support plate 41 and the shutter 45, and then the high temperature generated during the continuous partial discharge of the bus bar 2 and the diffusion speed of ozone and nitrogen oxides to the outside can be slowed down.

[0073] S2. Rapidly heat up the thermal expansion medium in the inner cavity of the first housing 31 to evaporate it, and then push the second piston 38 to slide in the inner cavity of the second gas distribution tube 37 in the direction of the second connecting plate 39;

[0074] By means of the cooperation between the heat-conducting sheet 33 and the heat-conducting wire 32, the high temperature generated by the continuous partial discharge of the busbar 2 can be transferred to the inner cavity of the first housing 31. Then, the heat expansion medium in the inner cavity of the first housing 31 is rapidly heated up and vaporized into a gas. Then, the anhydrous methanol gas will flow into the inner cavity of the second gas distribution pipe 37. Next, under the action of the anhydrous methanol gas, the second piston 38 can be pushed to move towards the connecting plate 39. Then, the second piston 38 can apply a force to the switch button at the upper end of the connecting plate 39 to control the operation of the buzzer alarm 7, reminding the staff that continuous partial discharge occurs at this position of the busbar 2.

[0075] S3. The air pump 81 operates to extract the gas in the inner cavity of the third gas transmission pipe 82, and then drives the gas in the inner cavity of the fourth gas transmission pipe 85 to flow. Then, it drives the gas in the inner cavities of the first gas transmission pipe 55 and the detection pipe 54 to flow, driving the third piston 56 to move towards the side away from the busbar 2, and driving the detection pipe 54 to extract the gas in the inner cavity of the semi-closed component 4;

[0076] By operating the air pump 81, the gas in the inner cavity of the third gas transmission pipe 82 is extracted by the air pump 81. Then, the gas in the inner cavity of the fourth gas transmission pipe 85 can be driven to flow into the inner cavity of the third gas transmission pipe 82. At the same time, the gas in the inner cavities of the detection pipe 54 and the first gas transmission pipe 55 will be driven to flow into the inner cavity of the fourth gas transmission pipe 85, so that the third piston 56 can be driven to slide in the inner cavity of the detection pipe 54, and then the detection pipe 54 can be driven to extract the gas in the inner cavity of the semi-closed component 4.

[0077] S4. By operating the ultraviolet lamp 58, the conversion of nitric oxide and nitrogen dioxide in the inner cavity of the detection pipe 54 into ozone is accelerated. Then, the ozone detection sensor 52 is used to detect it. At the same time, the detection data is transmitted to the data center for comparison to determine whether continuous partial discharge occurs at this position of the busbar 2;

[0078] By operating the ultraviolet lamp 58, ultraviolet rays can be generated. Then, through the irradiation of the ultraviolet rays, the conversion of nitric oxide and nitrogen dioxide in the inner cavity of the detection pipe 54 into ozone can be accelerated, so as to increase the ozone in the inner cavity of the detection pipe 54. Then, it is convenient for the ozone detection sensor 52 to detect the ozone in the inner cavity of the detection pipe 54. Then, the monitoring result is transmitted to the data center. Then, the data transmitted by the ozone detection sensors 52 at different heights at the same position are compared by the data center, and then it is judged whether continuous partial discharge occurs at this position of the busbar 2.

[0079] S5. By operating the air pump 81, the air pump 81 is used to deliver gas into the inner cavity of the third gas pipeline 82, and the gas in the inner cavity of the fourth gas pipeline 85 and the gas in the inner cavity of the first gas pipeline 55 are pushed to flow into the inner cavity of the detection tube 54, and the piston three 56 is pushed to slide towards the generatrix 2, and the exhaust gas detected in the inner cavity of the detection tube 54 is pushed into the inner cavity of the separation tube 53, and the exhaust gas is delivered into the inner cavity of the storage tube 66 through the second gas pipeline 62;

[0080] By operating the air pump 81, gas can be delivered into the inner cavity of the third gas pipeline 82, and then the gas in the inner cavity of the fourth gas pipeline 85 and the gas in the inner cavity of the first gas pipeline 55 can be pushed into the inner cavity of the detection tube 54, and then a force is applied to the piston three 56, so that the piston three 56 can be pushed to slide towards the direction of the generatrix 2, and the exhaust gas in the inner cavity of the detection tube 54 can be delivered into the inner cavity of the separation tube 53. Since the upper separation tube 53 is not connected to the second gas pipeline 62, the upper exhaust gas is directly discharged back into the bus bar chamber, and the lower separation tube 53 is connected to the second gas pipeline 62, so these exhaust gases will be delivered into the inner cavity of the storage tube 66 through the second gas pipeline 62, avoiding pollution to the surrounding environment caused by these exhaust gases.

[0081] The working principle of the switch cabinet with a partial discharge on-line monitoring structure and its monitoring method will be specifically described below.

[0082] As Figures 1 - 16 shown, the elastic force of the first spring 44 can be used to push the slider 43 to slide in the inner cavity of the first support plate 41, and then drive the shielding plate 45 to slide towards the generatrix 2, so that a semi-closed space can be formed by the cooperation of the first support plate 41 and the shielding plate 45. When the bus bar 2 discharges continuously, the surface temperature of the bus bar 2 accelerates to rise in a short time, and at the same time, ozone and nitrogen oxides are generated. By using the bus bar 2 to form a semi-closed space, the high temperature generated during the continuous partial discharge of the bus bar 2 and the diffusion speed of ozone and nitrogen oxides to the outside can be slowed down;

[0083] By closely fitting the heat-conducting fin 33 to the surface of the bus bar 2, the heat-conducting fin 33 can transfer thermal energy to the heat-conducting wire 32, and then the heat-conducting wire 32 is used to transport the heat into the inner cavity of the first housing 31, quickly heating the thermal expansion medium filled in the inner cavity of the first housing 31, so that its temperature can rise rapidly and then expand rapidly. Since the small holes formed in the piston 35 are relatively small, the liquid filled in the inner cavity of the first gas distribution pipe 34 cannot quickly flow through the small holes for commutation. Then, the resistance of the liquid to the piston 35 is greater than the gravity of the piston 38. Since the piston 35 cannot quickly move towards the side away from the first housing 31, the thermal expansion medium will move towards the piston 38, and then can push the piston 38 to move towards the side away from the first housing 31, so as to push the piston 38 to apply a force to the key switch installed at the upper end of the second connecting plate 39, and can control the corresponding buzzer alarm 7 to operate and emit a buzzer alarm, so as to remind the staff that the bus bar 2 at this position has a continuous partial discharge phenomenon;

[0084] At the same time, operate the air pump 81, and then use the air pump 81 to extract the gas in the inner cavity of the third air delivery pipe 82, and then the gas in the inner cavity of the fourth air delivery pipe 85 can be driven to flow into the inner cavity of the third air delivery pipe 82. At the same time, the gas in the detection pipe 54 and the first air delivery pipe 55 can be driven to flow into the inner cavity of the fourth air delivery pipe 85, so as to drive the piston 56 to slide in the inner cavity of the detection pipe 54, and then drive the detection pipe 54 to extract the gas in the inner cavity of the semi-closed component 4, and the ozone, nitrogen oxides and other gases in the semi-closed space can be extracted into the inner cavity of the detection pipe 54. The detection pipe 54 located above the main body 1 will extract the air above the bus bar chamber into the inner cavity. By fixedly connecting a plurality of ultraviolet lamps 58 in the inner cavity of the second housing 51, the gas in the inner cavity of the detection pipe 54 can be irradiated by the ultraviolet rays generated when the ultraviolet lamps 58 operate. Nitric oxide and nitrogen dioxide will be accelerated to convert into ozone under the irradiation of ultraviolet rays, and then the concentration of ozone in the inner cavity of the detection pipe 54 can be enhanced. Then, the ozone in the inner cavity of the detection pipe 54 can be monitored by the ozone detection sensor 52, and at the same time, the monitoring result can be transmitted to the data center. Then, the data transmitted by the ozone detection sensors 52 at different heights at the same position are compared by the data center, and then it is judged whether the bus bar 2 at this position has a continuous partial discharge;

[0085] Next, by operating the air pump 81, the air pump 81 conveys gas into the inner cavity of the third gas transmission pipe 82. Then, the gas in the inner cavity of the fourth gas transmission pipe 85 and the gas in the inner cavity of the first gas transmission pipe 55 can be pushed into the inner cavity of the detection pipe 54. Then, a force is applied to the third piston 56, so that the third piston 56 can be pushed to slide in the direction of the generatrix 2, and the waste gas in the inner cavity of the detection pipe 54 can be conveyed into the inner cavity of the discharge pipe 53. Since the upper discharge pipe 53 is not connected to the second gas transmission pipe 62, the upper waste gas is directly discharged back into the generatrix chamber. The lower discharge pipe 53 is connected to the second gas transmission pipe 62, so that these waste gases will be conveyed into the inner cavity of the storage pipe 66 through the second gas transmission pipe 62, avoiding pollution to the surrounding environment. Then, the staff can replace the storage pipe 66 and treat the collected waste gas.

[0086] The above has generally described the present invention in detail. However, based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the art. Therefore, the modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A switch cabinet with a partial discharge online monitoring structure, comprising a main body (1), a partition (11), a plurality of busbars (2), a plurality of temperature monitoring components (3), a gas monitoring component (5) and a plurality of buzzer alarms (7), wherein the upper portion of the main body (1) is fixedly connected to the partition (11); characterized in that: The temperature monitoring assembly (3) comprises a shell one (31), the lower end of the shell one (31) is fixedly connected to the upper end of the partition (11), the inner cavity of the shell one (31) is filled with a heat expansion medium, a heat conductive wire (32) is fixedly connected to the middle of the shell one (31), a heat conductive sheet (33) is fixedly connected to the side of the heat conductive wire (32) close to the busbar (2), and the heat conductive sheet (33) is tightly fitted to the outer surface of the adjacent busbar (2); A gas distribution pipe 1 (34) is fixedly connected to a side of the shell 1 (31) away from the busbar (2), and the inner cavity of the gas distribution pipe 1 (34) is communicated with the inner cavity of the shell 1 (31); a piston 1 (35) is slidably connected to the inner cavity of the gas distribution pipe 1 (34); a sealing plate (36) is fixedly connected to the middle of the inner cavity of the gas distribution pipe 1 (34); the piston 1 (35) is slidably connected to the sealing plate (36); a side of the inner cavity of the gas distribution pipe 1 (34) away from the shell 1 (31) is filled with liquid; a gas distribution pipe 2 (37) is fixedly connected to a side of the upper part of the shell 1 (31), and the inner cavity of the gas distribution pipe 2 (37) is communicated with the inner cavity of the shell 1 (31); a piston 2 (38) is slidably connected to the middle of the gas distribution pipe 2 (37); and a connecting plate 2 (39) is fixedly connected to a side of the upper end of the shell 1 (31) close to the gas distribution pipe 2 (37); One side of the upper portion of the main body (1) is fixedly connected to a plurality of buzzer alarms (7); one side of the upper portion of the main body (1) is provided with a collecting assembly (6), the collecting assembly (6) being used to store waste gas; one side of the upper portion of the main body (1) is provided with a driving assembly (8), the driving assembly (8) being used to provide power for the gas monitoring assembly (5) to extract gas; the gas monitoring assembly (5) on the side close to the partition (11) is fixedly connected to the partition (11), and the gas monitoring assembly (5) on the side away from the partition (11) is fixedly connected to the upper portion of the main body (1).

2. A switch cabinet with a partial discharge online monitoring structure according to claim 1, characterized in that: The gas monitoring assembly (5) comprises a second housing (51), a detection tube (54) being fixedly connected to the middle of the second housing (51), the detection tube (54) penetrating a side of an adjacent shield plate (45) away from the busbar (2) and extending to a side of the shield plate (45) close to the busbar (2), an ozone detection sensor (52) being fixedly connected to a side of the second housing (51) close to the busbar (2), and a detection end of the ozone detection sensor (52) extending through an end surface of the second housing (51) and an outer surface of the detection tube (54) in sequence. To the inner cavity of the detection tube (54), the side of the detection tube (54) away from the busbar (2) is fixedly connected to the gas supply pipe 1 (55), the side of the gas supply pipe 1 (55) away from the busbar (2) passes through the inner cavity of the shell 2 (51) and extends to the outer surface of the shell 2 (51), the inner cavity of the detection tube (54) is slidably connected to the piston 3 (56), the side of the detection tube (54) close to the busbar (2) is fixedly connected to the mounting block (541), and the middle part of the mounting block (541) is fixedly connected to the one-way valve 1 (542).

3. The switch cabinet with partial discharge online monitoring structure according to claim 2 is characterized in that: A plurality of ultraviolet lamps (58) are fixedly connected to the inner cavity of the second shell (51), and the detection tube (54) is made of a transparent glass material.

4. The switch cabinet with partial discharge online monitoring structure according to claim 3 is characterized in that: A discharge pipe (53) is fixedly connected to one side of the second shell (51), and a side of the discharge pipe (53) close to the detection pipe (54) sequentially penetrates the end surface of the second shell (51) and the outer surface of the detection pipe (54) and extends to the inner cavity of the detection pipe (54), and a second check valve (57) is fixedly connected to the inner cavity of the discharge pipe (53) close to the detection pipe (54).

5. The switch cabinet with partial discharge online monitoring structure according to claim 1 is characterized in that: A plurality of semi-enclosed components (4) are arranged at the upper end of the main body (1), and the semi-enclosed components (4) include two support plates (41) and two shielding plates (45). The lower ends of the two support plates (41) are fixedly connected to the upper end of the partition (11). The two support plates (41) are symmetrically fixedly connected to guide rods (42). The outer surfaces of the guide rods (42) are wound with springs (44). The inner cavities of the two support plates (41) are symmetrically slidably connected to sliders (43). The guide rods (42) on the same side are fixedly connected to the guide rods (42). The slider (43) is slidably connected, the side of the spring (44) on the same side close to the slider (43) is fixedly connected to the slider (43), the side of the spring (44) on the same side away from the slider (43) is fixedly connected to the inner wall of the support plate (41), the upper end of the shield plate (45) is fixedly connected to the lower ends of two adjacent sliders (43), a certain gap exists between the upper parts of the two shield plates (45) and the busbar (2), and the side of the heat conductive wire (32) close to the busbar (2) is slidably connected to the adjacent shield plate (45).

6. The switch cabinet with partial discharge online monitoring structure according to claim 1, characterized in that: The driving assembly (8) comprises an air pump (81) and two pneumatic integrated valves (84), wherein the air pump (81) is fixedly connected to the main body (1), and the pneumatic integrated valve (84) is fixedly connected to the main body (1). The output end of the air pump (81) is fixedly connected to a third air supply pipe (82), the air inlets of the two pneumatic integrated valves (84) are commonly fixedly connected to a shunt pipe (83), the shunt pipe (83) is fixedly connected to the third air supply pipe (82), and the air outlets of the pneumatic integrated valves (84) are both fixedly connected to a fourth air supply pipe (85), and the output end of the fourth air supply pipe (85) is fixedly connected to the input end of the adjacent first air supply pipe (55).

7. The switch cabinet with partial discharge online monitoring structure according to claim 1, characterized in that: The collecting assembly (6) comprises a connecting plate three (61), a plurality of springs two (64) and a plurality of storage tubes (66); the connecting plate three (61) is fixedly connected to the main body (1); a plurality of gas transmission tubes two (62) are fixedly connected to the middle of the connecting plate three (61); a support plate two (63) is symmetrically fixedly connected to the upper end of the connecting plate three (61); a clamping plate (65) is fixedly connected to the side of the spring two (64) close to the storage tube (66); a side of the spring two (64) away from the storage tube (66) is fixedly connected to the adjacent support plate two (63); and an input end of the gas transmission tube two (62) is fixedly connected to an output end of an adjacent separation tube (53).

8. The switch cabinet with partial discharge online monitoring structure according to claim 1, characterized in that: The heat conducting sheet (33) is arranged in a U shape, and the heat conducting wire (32) is arranged in a spiral shape in the inner cavity of the housing 1 (31).

9. A method for monitoring partial discharge in a switch cabinet, applicable to a switch cabinet with a partial discharge online monitoring structure as claimed in any one of claims 7 to 8, characterized in that: The following steps are involved: S1, the slider (43) is pushed to slide in the direction of the busbar (2) by the elastic force of the spring 1 (44), thereby driving the shielding plate (45) to slide in the direction of the busbar (2), thereby forming a semi-enclosed space; S2, by rapidly heating the heat expansion medium in the inner cavity of the shell 1 (31) to evaporate it, and then push the piston 2 (38) to slide in the inner cavity of the gas distribution pipe 2 (37) toward the connecting plate 2 (39); S3, the air pump (81) is operated to extract gas from the inner cavity of the gas delivery pipe three (82), and then drives the gas in the inner cavity of the gas delivery pipe four (85) to flow, and then drives the gas in the inner cavities of the gas delivery pipe one (55) and the detection pipe (54) to flow, drives the piston three (56) to move in a direction away from the busbar (2), and drives the detection pipe (54) to extract gas from the inner cavity of the semi-enclosed component (4); S4, by operating the ultraviolet lamp (58), accelerating the conversion of nitric oxide and nitrogen dioxide in the inner cavity of the detection tube (54) into ozone, and then using the ozone detection sensor (52) to detect it, and at the same time, transmitting the detection data to the data center for comparison to determine whether continuous partial discharge occurs at the busbar (2) at the location; S5. By operating the air pump (81), the air pump (81) is used to deliver gas to the inner cavity of the gas delivery pipe three (82), so as to push the gas in the inner cavity of the gas delivery pipe four (85) and the gas in the inner cavity of the gas delivery pipe one (55) to flow toward the inner cavity of the detection pipe (54), and push the piston three (56) to slide in the direction of the busbar (2), so as to push the waste gas detected in the inner cavity of the detection pipe (54) into the inner cavity of the separation pipe (53), and deliver the waste gas to the inner cavity of the storage pipe (66) through the gas delivery pipe two (62).

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