Line type insulation monitoring device

Abstract

This utility model discloses a line-type insulation monitoring device in the field of insulation monitoring technology, including a housing of the monitoring device, a cover plate on the top of the housing, a display screen embedded in the front of the housing, an insulation monitoring module installed on the inner side of the housing by bolts, fixing strips fixedly connected to both sides of the housing and both sides of the cover plate, a mounting bracket fitted on the outside of the fixing strips, and multiple sets of mounting parts evenly arranged on one side of the mounting bracket, the cover plate is U-shaped, and sealing strips are glued to the edges of the cover plate to increase the sealing of the splicing and snapping between the cover plate and the housing, and to prevent humid air from entering the housing and affecting the equipment, the mounting bracket has a U-shaped cross section, and the mounting bracket snaps onto the outside of the two fixing strips, using the mounting parts to snap and fix the housing and the cover plate.

Description

Technical Field

[0001] This utility model relates to the field of insulation monitoring, specifically a line-type insulation monitoring device. Background Technology

[0002] In the safety operation and maintenance system of power systems, line insulation monitoring devices, as key equipment for real-time monitoring of line insulation status, need to operate stably in complex environments such as substations, distribution rooms, and mines for extended periods. The housing 1 of these devices not only protects internal electronic components (such as signal injection modules and insulation status analysis modules 7) from dust, moisture, and external impacts, but its ease of installation and disassembly also directly affects the efficiency of daily maintenance.

[0003] Currently, insulation monitoring devices are not accurate in monitoring lines. The housing 1 of line-type insulation monitoring devices is generally fixed to the mounting surface (such as the inner wall of the distribution box or the bracket) with bolts. This traditional fixing method has obvious defects: on the one hand, the disassembly and assembly process requires the use of tools such as screwdrivers, and the operation steps are cumbersome. Especially when it is necessary to inspect the anti-interference processing module, communication module, etc. inside the device, it prolongs the maintenance time and reduces the fault response efficiency. On the other hand, after repeated disassembly and assembly, the housing 1 is easy to loosen, and may even fall off under the slight vibration generated by the operation of the equipment. This not only affects the protective performance of the housing 1, but may also cause the monitoring data to be distorted due to poor contact of internal components.

[0004] In addition, in special environments such as mines and metallurgical plants where there is vibration and dust, dust and moisture can easily seep into the gaps of bolted connections, accelerating the aging of internal electronic components. When it is necessary to temporarily disassemble the device for offline calibration (such as the accuracy calibration of the insulation status analysis module 7), the cumbersome bolt disassembly and assembly operations will increase the difficulty of operation and make it difficult to meet the needs of rapid maintenance. Therefore, it is necessary to design a line-type insulation monitoring device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a line insulation monitoring device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a line-type insulation monitoring device, comprising a housing of the monitoring device, a cover plate on the top of the housing, a display screen embedded in the front side of the housing, an insulation monitoring module installed inside the housing by bolts, fixing strips fixedly connected to both sides of the housing and both sides of the cover plate, a mounting frame fitted on the outside of the fixing strips, and multiple sets of mounting components evenly arranged on one side of the mounting frame, the mounting components being used to remove and install the cover plate to inspect the components inside the housing.

[0007] Preferably, the insulation monitoring module includes a signal acquisition module fixedly installed at the bottom of the housing, an analysis module installed on one side of the signal acquisition module, a positioning module installed on one side of the analysis module, and a human-machine interaction module installed on the other side of the positioning module.

[0008] Preferably, the mounting component includes two sets of movable cavities evenly arranged inside the mounting frame. A bidirectional screw runs through the inner side of each movable cavity. Two connecting plates are fitted on the outer side of the bidirectional screw. A locking block is fixedly connected to one side of each connecting plate. A plurality of locking slots are evenly arranged on one side of the fixing strip. Each set of movable cavities includes a plurality of locking blocks, and the locking blocks correspond one-to-one with the locking slots.

[0009] Preferably, a plurality of evenly arranged fixing rods are fixedly installed inside the movable cavity, and the fixing rods pass through the connecting plate and are slidably connected to it.

[0010] Preferably, a spring is fitted on the outer side of the fixing rod, and the two ends of the spring are fixedly connected to the movable cavity and the connecting plate, respectively.

[0011] Preferably, the mounting bracket has limit strips fixedly connected to both sides inside, and limit grooves are formed on both sides of the fixed strips, with the limit strips and limit grooves being slidably connected.

[0012] Preferably, one of the fixing strips has a positioning portion extending downward from its bottom, the positioning portion being embedded in the top of the other fixing strip.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The cover plate is U-shaped, and sealing strips are glued to the edges of the cover plate to increase the sealing of the splicing buckle between the cover plate and the housing, and to prevent humid air from entering the housing and affecting the equipment. The mounting bracket has a U-shaped cross section, and the mounting bracket is snapped on the outside of the two fixing strips. The housing and cover plate are fixed by the mounting bracket.

[0015] 2. The signal acquisition module is responsible for injecting specific detection signals into the line and collecting feedback data. It integrates a high-precision A / D converter (sampling rate ≥1kHz) and a zero-sequence current transformer to collect leakage current and insulation resistance feedback signals in the line in real time, providing raw data for subsequent analysis. The analysis module calculates the collected resistance and current signals to generate insulation resistance values ​​in real time (measurement range 1K-5MΩ, accuracy ±10%), and judges the insulation status of the line by combining preset thresholds (e.g., triggering an early warning when the insulation resistance is below 500KΩ). The analysis model predicts the trend of insulation performance degradation through continuous monitoring data and provides early warning. The module identifies and locates latent faults, enabling precise fault location. Combining zero-sequence current transformer and feeder branch switching information, it calculates the fault distance using the "current difference method." When an insulation fault is detected, it triggers the switching status of each branch monitoring unit, eliminating non-faulty branches and narrowing the fault range. The human-machine interface module visualizes the monitoring status and provides fault alerts. It displays insulation resistance values ​​and line status in real time on screen 3; it issues warnings via audible and visual alarms during faults; and it supports RS485 interface integration with the backend system, outputting switching alarm signals for rapid response by maintenance personnel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a breakdown diagram of the overall structure of this utility model;

[0018] Figure 3 This is a left-side sectional perspective view of the overall structure of this utility model;

[0019] Figure 4 The overall structure of this utility model Figure 3 Enlarged view of point A in the middle.

[0020] In the diagram: 1. Housing; 2. Cover plate; 3. Display screen; 4. Fixing strip; 5. Mounting bracket; 6. Signal acquisition module; 7. Analysis module; 8. Positioning module; 9. Human-machine interaction module; 10. Movable cavity; 11. Bidirectional screw; 12. Connecting plate; 13. Locking block; 14. Locking groove; 15. Fixing rod; 16. Spring; 17. Limiting strip; 18. Limiting groove; 19. Positioning part. Detailed Implementation

[0021] 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.

[0022] Example 1

[0023] Please refer to Figure 1-4 As shown, this utility model provides a line insulation monitoring device, including a housing 1 of the monitoring device, a cover plate 2 on the top of the housing 1, a display screen 3 embedded on the front side of the housing 1, an insulation monitoring module installed on the inner side of the housing 1 by bolts, fixing strips 4 are fixedly connected to both sides of the housing 1 and both sides of the cover plate 2, a mounting bracket 5 is fitted on the outer side of the fixing strips 4, and multiple sets of mounting parts are evenly arranged on one side of the mounting bracket 5. The mounting parts are used to remove and install the cover plate 2 to inspect the components inside the housing 1.

[0024] As should be added, the cover plate 2 is U-shaped, and sealing strips are glued to the edges of the cover plate 2 to increase the sealing of the splicing and snapping of the cover plate 2 and the housing 1, so as to prevent humid air from entering the housing 1 and affecting the equipment. The mounting bracket 5 has a U-shaped cross section and is snapped on the outside of the two fixing strips 4. The mounting bracket is used to snap and fix the housing 1 and the cover plate 2.

[0025] Specifically, the insulation monitoring module includes a signal acquisition module 6 fixedly installed at the bottom of the housing 1, an analysis module 7 installed on one side of the signal acquisition module 6, a positioning module 8 installed on one side of the analysis module 7, and a human-machine interaction module 9 installed on the other side of the positioning module 8.

[0026] The signal acquisition module 6 is responsible for injecting specific detection signals into the line and collecting feedback data. It integrates a high-precision A / D converter (sampling rate ≥ 1kHz) and a zero-sequence current transformer to collect leakage current and insulation resistance feedback signals in the line in real time, providing raw data for subsequent analysis. The analysis module 7 calculates the collected resistance and current signals to generate insulation resistance values ​​in real time (measurement range 1K-5MΩ, accuracy ±10%), and judges the insulation status of the line by combining preset thresholds (such as triggering an early warning when the insulation resistance is lower than 500KΩ). The analysis model predicts the trend of insulation performance degradation through continuous monitoring data. The pre-detection and location module 8 is designed to accurately locate hidden faults. By combining the zero-sequence current transformer and feeder branch switch information, it calculates the fault distance using the "current difference method." When an insulation fault is detected, it links the switch status of each branch monitoring unit to exclude non-faulty branches and narrow down the fault range. The human-machine interaction module 9 visualizes the monitoring status and provides fault alerts. It displays the insulation resistance value and line status in real time on the display screen 3 and issues warnings via an audible and visual alarm when a fault occurs. It also supports RS485 interface for connection with the backend system, outputting switch alarm signals for quick response by maintenance personnel.

[0027] More specifically, the mounting component includes two sets of movable cavities 10 evenly arranged inside the mounting frame 5. A bidirectional screw 11 passes through the inner side of the movable cavity 10. Two connecting plates 12 are fitted on the outer side of the bidirectional screw 11. A locking block 13 is fixedly connected to one side of the connecting plate 12. A plurality of locking slots 14 are evenly arranged on one side of the fixing strip 4. Each set of movable cavities 10 includes multiple locking blocks 13 and locking slots 14 in a one-to-one correspondence. A plurality of fixing rods 15 are evenly arranged and fixedly installed inside the movable cavity 10. The fixing rods 15 pass through the connecting plate 12 and are slidably connected to it. A spring 16 is fitted on the outer side of the fixing rod 15. The two ends of the spring 16 are fixedly connected to the movable cavity 10 and the connecting plate 12 respectively. A positioning part 19 extends downward from the bottom of one of the fixing strips 4 and is embedded in the top of the other fixing strip 4.

[0028] As should be added, when the cover plate 2 is spliced ​​with the shell 1, the two fixing strips 4 are spliced ​​together. The positioning part 19 at the bottom of the upper fixing strip 4 is embedded into the top of the lower fixing strip 4 for limiting and fixing. Then, the mounting bracket 5 is placed on the outside of the two fixing strips 4 and slid. Then, the bidirectional screw 11 is rotated so that the bidirectional screw 11 drives the locking block 13 on one side of the connecting plate 12 to be inserted into or disengaged from the locking groove 14. The fixing rod 15 can guide the connecting plate 12, and the spring 16 on the outside of the fixing rod 15 can squeeze and push the connecting plate 12, thereby improving the stability of the splicing and installation of the cover plate 2 and the shell 1.

[0029] Furthermore, limiting strips 17 are fixedly connected to both sides of the inside of the mounting bracket 5, and limiting grooves 18 are opened on both sides of the fixing strip 4. The limiting strips 17 and the limiting grooves 18 are slidably connected. The cross sections of the limiting strips 17 and the limiting grooves 18 are both "convex". When the mounting bracket 5 slides on the outside of the two fixing strips 4, the limiting strips 17 are embedded in the limiting grooves 18 to slide, which increases the stability of the mounting bracket 5 and the fixing strips 4 splicing and installation.

[0030] Working principle: First, cover plate 2 is placed downwards on top of housing 1, and two fixing strips 4 are spliced ​​together. At the same time, the positioning part 19 at the bottom of the upper fixing strip 4 is embedded into the top of the lower fixing strip 4 for limiting and fixing. Then, mounting bracket 5 is clipped on the outside of the two fixing strips 4 and slides. At the same time, limiting strip 17 slides in limiting groove 18. Then, the bidirectional screw 11 is rotated, so that the bidirectional screw 11 drives the locking block 13 on one side of the connecting plate 12 to be embedded in the locking groove 14. The fixing rod 15 can guide the connecting plate 12, and the spring 16 on the outside of the fixing rod 15 squeezes and pushes the connecting plate 12.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A line insulation monitoring device, comprising a housing (1) of the monitoring device, characterized in that: The top of the housing (1) is covered with a cover plate (2), and a display screen (3) is embedded in the front side of the housing (1). An insulating monitoring module is installed inside the housing (1) by bolts. Fixing strips (4) are fixedly connected to both sides of the housing (1) and both sides of the cover plate (2). A mounting bracket (5) is fitted on the outside of the fixing strip (4). Multiple sets of mounting parts are evenly arranged on one side of the mounting bracket (5). The mounting parts are used to remove and install the cover plate (2) to inspect the components inside the housing (1).

2. The line insulation monitoring device according to claim 1, characterized in that: The insulation monitoring module includes a signal acquisition module (6) fixedly installed at the bottom of the housing (1), an analysis module (7) is installed on one side of the signal acquisition module (6), a positioning module (8) is installed on one side of the analysis module (7), and a human-machine interaction module (9) is installed on the other side of the positioning module (8).

3. The line insulation monitoring device according to claim 2, characterized in that: The mounting component includes two sets of movable cavities (10) evenly arranged inside the mounting frame (5). A bidirectional screw (11) runs through the inner side of each movable cavity (10). Two connecting plates (12) are fitted on the outer side of the bidirectional screw (11). A locking block (13) is fixedly connected to one side of the connecting plate (12). A plurality of locking slots (14) are evenly arranged on one side of the fixing strip (4). Each set of movable cavities (10) includes a plurality of locking blocks (13) and locking slots (14) correspond one-to-one.

4. The line insulation monitoring device according to claim 3, characterized in that: The movable cavity (10) is fixedly installed with a plurality of uniformly arranged fixing rods (15), which pass through the connecting plate (12) and are slidably connected to it.

5. The line insulation monitoring device according to claim 4, characterized in that: A spring (16) is fitted on the outside of the fixed rod (15), and the two ends of the spring (16) are fixedly connected to the movable cavity (10) and the connecting plate (12) respectively.

6. The line insulation monitoring device according to claim 5, characterized in that: The mounting bracket (5) has a limiting strip (17) fixedly connected to both sides inside. The fixing strip (4) has a limiting groove (18) on both sides. The limiting strip (17) and the limiting groove (18) are slidably connected.

7. The line insulation monitoring device according to claim 3, characterized in that: One of the fixing strips (4) has a positioning part (19) extending downward from its bottom, and the positioning part (19) is embedded in the top of the other fixing strip (4).

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