A partial discharge monitoring device for power ring main unit

Abstract

The utility model discloses a kind of electric power looped network box partial discharge monitoring devices, belong to electric power system monitoring technical field, the device includes receiving end and monitoring end. Among them, receiving end and monitoring end are connected through signal source line, and several clamping plates are equipped on monitoring end, and clamping plate is connected with gyro wheel by support assembly. Support assembly includes first branch arm, second branch arm and third branch arm. First branch arm, second branch arm and third branch arm are mutually rotated, and rotating angle is locked by gear engagement component. The advantage of the utility model is: gyro wheel is adhered on the surface to be monitored and rolled. Monitoring end can be monitored to the surface to be monitored with stable distance and track, and then the stability of monitoring result is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of power system monitoring technology, specifically to a partial discharge monitoring device for a power ring network box. Background Technology

[0002] Power ring main units (RMUs) are core equipment in the power distribution network architecture, primarily responsible for power distribution, line switching, and fault isolation. Their operational status directly affects the continuity and security of power supply. Partial discharge, as a key early signal reflecting the deterioration of insulation performance within the RMU, is an important maintenance tool for preventing insulation breakdown and avoiding sudden outages. Therefore, partial discharge monitoring devices have become one of the core auxiliary equipment for the daily operation and maintenance of RMUs.

[0003] Existing partial discharge monitoring devices for power ring main units have significant technical limitations in practical applications. These devices are generally operated manually, making it difficult to maintain a constant distance from the monitored surface as the monitoring device moves. Furthermore, the movement trajectory is easily affected by external interference, resulting in a lack of a fixed and stable monitoring path. This leads to insufficient stability in signal acquisition during monitoring, resulting in inconsistent monitoring data across different time periods or locations. Consequently, the accuracy of partial discharge status assessment is affected, failing to meet the reliability requirements of refined operation and maintenance of power ring main units. Utility Model Content

[0004] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide a partial discharge monitoring device for power ring network boxes, thereby solving the problem that the monitoring distance and trajectory of existing partial discharge monitoring devices are unstable when monitoring power ring network boxes, thus affecting the reliability of the monitoring results.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a partial discharge monitoring device for a power ring network box, comprising: a receiving end and a monitoring end, wherein the receiving end and the monitoring end are connected by a signal source line, and the monitoring end is provided with a plurality of clamping plates, wherein the clamping plates are connected to rollers by a support arm assembly; wherein the support arm assembly includes a first support arm, a second support arm and a third support arm, wherein the first support arm and the second support arm, the second support arm and the third support arm rotate relative to each other, and the rotation angle is locked by a gear engagement assembly.

[0006] Optionally, the first support arm is fixed to the card plate, the second support arm includes a movable block rotatably connected to the first support arm, the movable block is sleeved on the screw and locked by a first locking part, the screw is fixed to the flipping block, and the flipping block is rotatably connected to the third support arm.

[0007] Optionally, the movable block is locked to the first support arm by a meshing assembly.

[0008] Optionally, the third arm includes a support plate rotatably connected to the flipping block, the support plate being fixed to the third magnetic part, and the third magnetic part being rotatably connected to the roller.

[0009] Optionally, the flipping block and the support plate are locked together by a meshing assembly.

[0010] Optionally, the roller includes a wheel body and a wheel frame that supports the rotation of the wheel body. A rotating shaft is fixed on the wheel frame, and the third magnetic part is sleeved on the rotating shaft and locked by the second locking part.

[0011] Optionally, a number of protrusions are fixed on the monitoring end, and a number of grooves are provided on the card plate, with the protrusions slidably connected in the grooves.

[0012] Optionally, a first magnetic part and a second magnetic part are fixed on the side of the card plate away from the monitoring end, and the movable block rotates relative to the first support arm and has at least the following states: a first state in which the first magnetic part and the third magnetic part are magnetically connected; and a second state in which the second magnetic part and the third magnetic part are magnetically connected.

[0013] Optionally, the meshing assembly includes a first meshing portion and a second meshing portion that mesh with each other, the sides of the first meshing portion and the second meshing portion that are far apart from each other are respectively fixed to a first fixed surface and a second fixed surface, and the first meshing portion and the second meshing portion are locked together by a third locking portion.

[0014] Optionally, it also includes a dust cover that covers the outside of the card plate.

[0015] The beneficial effects of this utility model are as follows: This invention features a card plate on the monitoring end, with rollers connected to the card plate via a support arm assembly. Once locked, the rollers can roll on the monitored surface of the power ring network box, allowing the monitoring end to perform partial discharge monitoring of the power ring network box at a constant distance and along a constant track. This avoids interference from manual handheld monitoring methods and improves the accuracy of the monitoring.

[0016] Meanwhile, the support arm assembly of this utility model includes a first support arm, a second support arm, and a third support arm. These three support arms can rotate relative to each other and are locked together by a meshing assembly, enabling the equipment to be flexibly adjusted according to the actual situation of the monitored surface, thereby expanding the application scenarios.

[0017] In addition, the second arm of this utility model includes a movable block and a screw. The movable block is sleeved on the screw and locked by the first locking part, which makes the distance between the screw and the movable block adjustable. This allows the distance from the monitoring end to the surface being tested to be adjusted according to different testing requirements, further expanding the application scenarios.

[0018] In summary, the equipment provided by this utility model can improve the stability of partial discharge monitoring of power ring network boxes, thereby improving the reliability of the monitoring process.

[0019] The beneficial effects of this utility model are as follows: This invention features a locking plate on the monitoring end, with a roller connected to the plate via a support arm assembly. After adjustment and locking, the roller can roll in close contact with the monitored surface of the power ring network box. This structural design ensures that the monitoring end maintains a preset constant distance from the monitored surface during mobile monitoring, forming a stable and fixed monitoring trajectory. This fundamentally avoids the problems of monitoring distance fluctuations and trajectory deviations caused by hand tremors, uneven force application, or operational deviations in traditional monitoring methods such as manual handheld operation. It significantly reduces the impact of external interference on partial discharge signal acquisition, thereby improving the consistency of monitoring data and the accuracy of monitoring results.

[0020] Meanwhile, the support arm assembly of this utility model consists of a first arm, a second arm, and a third arm, which can rotate flexibly and are securely locked at the rotation angle by a meshing assembly. The meshing assembly, with its interlocking structural characteristics, enables precise positioning and reliable fixation of the rotation angle, preventing angle shifts in the support arm due to equipment movement or minor external vibrations after adjustment. This design allows the device to flexibly adjust the support arm shape according to the actual structure of the monitored surface of the power ring main unit (such as a flat surface, a curved surface, or a surface with protruding attachments), ensuring that the rollers are always in close contact with the monitored surface. This effectively improves the device's adaptability to power ring main units of different specifications and structures, significantly expanding its practical application scenarios.

[0021] Furthermore, the second arm of this invention integrates a movable block and a screw structure. The movable block can slide along the screw axis and is fixed in position after sliding by the first locking part. This adjustable structure can precisely control the relative distance between the screw and the movable block, thereby flexibly adjusting the distance between the monitoring end and the monitored surface as needed. It can meet the requirements of partial discharge signal strength and resolution for close-range monitoring, and can also adapt to the slightly longer-range monitoring needs required due to differences in the insulation layer thickness of the ring network box surface, accessory obstruction, or specific monitoring standards. This further expands the applicability of the device under different monitoring conditions and enhances its practical value in complex operation and maintenance scenarios.

[0022] In summary, this utility model effectively solves the technical problems of unstable monitoring distance and trajectory and limited application scenarios of existing monitoring devices, and ultimately significantly improves the overall stability of partial discharge monitoring of power ring network boxes, providing more reliable hardware support for monitoring procedures and helping to ensure the accuracy and effectiveness of power ring network box operation and maintenance. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of a partial discharge monitoring device for a power ring network box according to the present invention.

[0025] Figure 2 This is a partial perspective view of a partial discharge monitoring device for a power ring network box according to the present invention.

[0026] Figure 3 This utility model relates to a partial discharge monitoring device for a power ring network box, which is subject to a partial explosion. Figure 1 .

[0027] Figure 4 This utility model relates to a partial discharge monitoring device for a power ring network box. Figure 3 Enlarged view of point A in the middle.

[0028] Figure 5 This utility model relates to a partial discharge monitoring device for a power ring network box, which is subject to a partial explosion. Figure 2 .

[0029] Figure 6 This utility model relates to a partial discharge monitoring device for a power ring network box. Figure 5 Enlarged view of section B in the middle.

[0030] Explanation of reference numerals in the attached figures: 1. Receiver; 11. Monitoring end; 12. Protruding strip; 2. Card plate; 21. Groove; 22. First magnetic part; 23. Second magnetic part; 3. First arm; 4. Second arm; 41. Screw; 42. Tilting block; 43. Movable block; 44. First locking part; 5. Third support arm; 51. Third magnetic part; 52. Rotating shaft; 53. Second locking part; 54. Support plate; 6. Rollers; 7. Engaging assembly; 71. First engagement part; 72. Second engagement part; 73. Third locking part. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] As mentioned earlier, existing partial discharge monitoring devices for power ring main units have significant technical limitations in practical applications. These devices are generally operated manually, making it difficult to maintain a constant distance from the monitored surface as the monitoring device moves. Furthermore, the movement trajectory is easily affected by external interference, resulting in an inability to establish a fixed and stable monitoring path. This leads to insufficient stability in signal acquisition during monitoring, resulting in inconsistent monitoring data across different time periods or locations. Consequently, this affects the accuracy of partial discharge status assessment and fails to meet the reliability requirements of refined operation and maintenance of power ring main units.

[0033] To address this issue, this utility model provides a monitoring device applied to the partial discharge monitoring process of a power ring network box. By constructing a stable support for the monitoring equipment, the aforementioned problems are solved. This utility model solves the problem in the following way.

[0034] Example 1: Please refer to the instruction manual appendix. Figures 1 to 6 As shown in the figure, this embodiment provides a partial discharge monitoring device for a power ring network box. The device includes a receiving end 1 and a monitoring end 11, which are connected by a signal source line. The monitoring end 11 includes a handle and a main body, on which a plurality of card plates 2 are evenly distributed around it.

[0035] like Figures 1 to 2 As shown, in this embodiment, each card plate 2 is equipped with an arm assembly. This arm assembly includes a first arm 3, a second arm 4, and a third arm 5. Figure 3As shown, the first arm 3 is fixed to the clamping plate 2, and includes an arm seat and a first arm plate extending from the arm seat. The second arm 4 includes a movable block 43, with first shafts at both ends of the movable block 43, which are rotatably connected to the first arm plate and locked by a gear assembly 7. The second arm 4 also includes a screw 41, which passes through the movable block 43, and each end of the movable block 43 has a first locking part 44 threaded onto the screw 41. In use, by turning the first locking part 44, the position between the movable block 43 and the screw 41 can be changed, thereby achieving adjustment.

[0036] like Figure 3 As shown, in this first embodiment, the screw 41 is fixed to the flipping block 42, and the two ends of the flipping block 42 are fixed with second shafts. The second shafts are rotatably connected to the support plate 54, which is fixed to the third magnetic part 51 (one of the components of the third support arm 5). The support plate 54 and the second shafts are also locked together by the meshing assembly 7. By operating the locking state of the meshing assembly 7, the rotation angle between the flipping block 42 and the third magnetic part 51 can be adjusted.

[0037] like Figure 3 As shown, in this first embodiment, a roller 6 is provided below the third magnetic part 51. The roller 6 includes a wheel body and a wheel frame that supports the rotation of the wheel body. A rotating shaft 52 is fixed on the wheel frame. The third magnetic part 51 is sleeved on the rotating shaft 52 and locked by the second locking part 53.

[0038] Therefore, in the specific implementation of this embodiment, the operator adjusts the angle between the first arm plate and the movable block 43 according to the requirements. After adjustment, the locking assembly 7 is used for locking. At the same time, the first locking part 44 is unscrewed, so that there is a space for movement between the movable block 43 and the screw 41. The operator adjusts the distance between the movable block 43 and the flipping block 42 according to this space. After adjustment, the first locking part 44 is tightened again to complete the fixation between the screw 41 and the flipping block 42. Then, following the locking method of the aforementioned locking assembly 7, the operator locks the support plate 54 and the flipping block 42 after adjusting the angle. Finally, the second locking part 53 is loosened, and the roller 6 is adjusted to the required angle before being tightened again. This completes the initial debugging of the support arm assembly. At this time, the operator can operate the monitoring terminal 11 to monitor the partial discharge of the power ring network box. During this process, the roller 6 rolls on the monitored surface of the power ring network box, always providing a constant distance and stable track support for the monitoring end 11, thereby ensuring the stability of data acquisition by the monitoring end 11.

[0039] Example 2: Based on the above embodiments, in order to provide a clearer and more complete explanation of the technical solutions therein, this utility model also provides an embodiment two. For example... Figures 5 to 6 As shown in this second embodiment, a plurality of protruding strips 12 are fixed on the main body of the monitoring end 11, and a plurality of grooves 21 are provided on the clamping plate 2, with a sealing bottom provided at the bottom of the grooves 21. During installation, the protruding strips 12 slide from the top of the grooves 21 into the grooves 21, and the installation is completed when they contact the sealing bottom of the grooves 21. At this time, the clamping plate 2 is connected to the monitoring end 11 under the influence of friction.

[0040] Example 3: Based on the above embodiments, in order to further clarify and completely explain the technical solutions therein, this utility model also provides Embodiment Three. For example... Figures 1 to 3 As shown, in this third embodiment, a first magnetic part 22 and a second magnetic part 23 are fixed on the side of the card plate 2 away from the monitoring end 11, respectively. The first magnetic part 22 faces upward (away from the monitored surface of the power ring network box), and the second magnetic part 23 faces downward (closer to the monitored surface of the power ring network box). The movable block 43 rotates relative to the first support arm 3 and has at least the following states: In the first state, the first magnetic part 22 and the third magnetic part 51 are magnetically connected. In this first state, the roller 6 is away from the monitored surface of the power ring network box, and the support arm assembly is stored to facilitate its storage. The device also includes a dust cover. In the first state, the dust cover covers the outside of the card plate 2, the support arm assembly, and the roller 6.

[0041] In the second state, the second magnetic part 23 and the third magnetic part 51 are magnetically connected. In this second state, the roller 6 is tightly attached to the monitored surface of the power ring network box, thereby providing constant distance and stable trajectory support for the monitoring process.

[0042] It should also be noted that the second magnetic part 23 has a first thickness, which needs to be greater than the sum of: the maximum moving distance of the movable block 43 on the screw 41, the thickness of the third magnetic part 51, and the displacement difference formed by the angle adjustment of the entire support arm assembly. This is to ensure that the third magnetic part 51 can be magnetically adsorbed onto the second magnetic part 23 in any state.

[0043] Fourth embodiment: Based on the above embodiments, in order to further clarify and completely explain the technical solutions therein, this utility model also provides Embodiment Three. For example... Figures 3 to 4 As shown, in this embodiment four, the meshing assembly 7 includes a first meshing part 71 and a second meshing part 72 that mesh with each other. The sides of the first meshing part 71 and the second meshing part 72 that are far apart from each other are fixed to the first fixing surface and the second fixing surface, respectively. The first meshing part 71 and the second meshing part 72 are locked together by a third locking part 73.

[0044] When the meshing assembly 7 is used to lock the first arm plate and the movable block 43, the first fixed surface is the contact surface between the first meshing part 71 and the first arm plate. Correspondingly, the second fixed surface is the contact surface between the second meshing part 72 and the movable block 43. At this time, the third locking part 73 is sleeved and threaded to the outside of the first shaft. Since the first arm plate has a certain deformation capacity, when the third locking part 73 is gradually tightened, the first arm plates on both sides move closer to each other under the action of extrusion force, driving the first meshing part 72 to gradually move closer to the second meshing part 71 until they are fully engaged. At this time, the angle between the first arm 3 and the movable block 43 is fixed.

[0045] When the meshing assembly 7 is used to lock the support plate 54 and the flipping block 42, the first fixing surface is the contact surface between the first meshing part 71 and the flipping block 42. Correspondingly, the second fixing surface is the contact surface between the second meshing part 72 and the support plate 54. At this time, the third locking part 73 is sleeved and threaded to the outside of the second shaft. Since the support plate 54 has a certain deformation capacity, when the third locking part 73 is gradually tightened, the support plates 54 on both sides move closer to each other under the action of extrusion force, driving the first meshing part 72 to gradually move closer to the second meshing part 71 until they are fully engaged. At this time, the angle between the support plate 54 and the flipping block 42 is fixed.

[0046] Therefore, in summary, compared with the prior art, this utility model and its embodiments have the following advantages, including but not limited to: This invention features a locking plate 2 on the monitoring end 11, with a roller 6 connected to the locking plate 2 via a support arm assembly. After adjustment and locking, the roller 6 can roll tightly against the monitored surface of the power ring network box. This structural design ensures that the monitoring end 11 maintains a preset constant distance from the monitored surface during mobile monitoring, forming a stable and fixed monitoring trajectory. This fundamentally avoids the problems of monitoring distance fluctuations and trajectory deviations caused by hand tremors, uneven force application, or operational deviations in traditional monitoring methods such as manual handheld operation. It significantly reduces the impact of external interference on partial discharge signal acquisition, thereby improving the consistency of monitoring data and the accuracy of monitoring results.

[0047] Meanwhile, the support arm assembly of this utility model consists of a first support arm 3, a second support arm 4, and a third support arm 5. These three arms can rotate flexibly, and the rotation angle is securely locked by a meshing assembly 7. The meshing assembly 7, with its interlocking structure, enables precise positioning and reliable fixing of the rotation angle, preventing angle shifts in the support arm due to equipment movement or minor external vibrations after adjustment. This design allows the device to flexibly adjust the support arm shape according to the actual structure of the monitored surface of the power ring main unit (such as a flat surface, an arc surface, or a surface with protruding attachments), ensuring that the roller 6 is always in close contact with the monitored surface. This effectively improves the device's adaptability to power ring main units of different specifications and structures, significantly expanding its practical application scenarios.

[0048] Furthermore, the second arm 4 of this invention integrates a movable block 43 and a screw 41. The movable block 43 can slide along the axial direction of the screw 41 and its position is fixed after sliding by the first locking part 44. This adjustable structure can precisely control the relative distance between the screw 41 and the movable block 43, thereby flexibly adjusting the distance between the monitoring end 11 and the monitored surface as needed. This not only meets the requirements of near-range monitoring for partial discharge signal strength and resolution, but also adapts to the slightly longer-range monitoring needs required due to differences in the insulation layer thickness of the ring network box surface, accessory obstruction, or specific monitoring standards. This further expands the applicability of the device under different monitoring conditions and enhances its practical value in complex operation and maintenance scenarios.

[0049] In summary, this utility model effectively solves the technical problems of unstable monitoring distance and trajectory and limited application scenarios of existing monitoring devices, and ultimately significantly improves the overall stability of partial discharge monitoring of power ring network boxes, providing more reliable hardware support for monitoring procedures and helping to ensure the accuracy and effectiveness of power ring network box operation and maintenance.

[0050] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A partial discharge monitoring device for a power ring network box, characterized in that, include: The receiver (1) and the monitoring end (11) are connected by a signal source line. The monitoring end (11) is provided with several card plates (2). The card plates (2) are connected to rollers (6) by a support arm assembly. The arm assembly includes a first arm (3), a second arm (4) and a third arm (5). The first arm (3) and the second arm (4), the second arm (4) and the third arm (5) rotate relative to each other and are locked at the rotation angle by a gear assembly (7).

2. The partial discharge monitoring device for a power ring network box as described in claim 1, characterized in that, The first support arm (3) is fixed on the card plate (2), and the second support arm (4) includes a movable block (43) rotatably connected to the first support arm (3). The movable block (43) is sleeved on the screw (41) and locked by the first locking part (44). The screw (41) is fixed on the flip block (42), and the flip block (42) and the third support arm (5) are rotatably connected.

3. The partial discharge monitoring device for a power ring network box as described in claim 2, characterized in that, The movable block (43) is locked to the first support arm (3) by a meshing assembly (7).

4. The partial discharge monitoring device for a power ring network box as described in claim 2, characterized in that, The third arm (5) includes a support plate (54) rotatably connected to the flipping block (42), the support plate (54) is fixed on the third magnetic part (51), and the third magnetic part (51) and the roller (6) are rotatably connected.

5. The partial discharge monitoring device for a power ring network box as described in claim 4, characterized in that, The flipping block (42) and the support plate (54) are locked together by a meshing assembly (7).

6. The partial discharge monitoring device for a power ring network box as described in claim 4, characterized in that, The roller (6) includes a wheel body and a wheel frame that supports the rotation of the wheel body. A rotating shaft (52) is fixed on the wheel frame. The third magnetic part (51) is sleeved on the rotating shaft (52) and locked by the second locking part (53).

7. The partial discharge monitoring device for a power ring network box as described in claim 1, characterized in that, The monitoring end (11) is fixed with several protrusions (12), and the card plate (2) is provided with several grooves (21). The protrusions (12) are slidably connected in the grooves (21).

8. The partial discharge monitoring device for a power ring network box as described in claim 4, characterized in that, The card plate (2) has a first magnetic part (22) and a second magnetic part (23) fixed on the side away from the monitoring end (11). The movable block (43) rotates relative to the first support arm (3) and has at least the following states: In the first state, the first magnetic part (22) and the third magnetic part (51) are magnetically connected; In the second state, the second magnetic part (23) and the third magnetic part (51) are magnetically connected.

9. The partial discharge monitoring device for a power ring network box as described in claim 1, characterized in that, The meshing assembly (7) includes a first meshing part (71) and a second meshing part (72) that mesh with each other. The sides of the first meshing part (71) and the second meshing part (72) that are far apart from each other are fixed to a first fixing surface and a second fixing surface, respectively. The first meshing part (71) and the second meshing part (72) are locked together by a third locking part (73).

10. A partial discharge monitoring device for a power ring network box as described in claim 1, characterized in that, It also includes a dust cover that covers the outside of the card plate (2).

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