A kind of distributed feeder cable insulation parameter on-line acquisition device

Abstract

The utility model discloses an electrical monitoring technical field's a kind of distributed feeder cable insulation parameter on -line acquisition device, distribution is located at each key node of each feeder, and it include: mounting frame, be located below feeder and with the parallelism of feeder trend;Two groups of acquisition components, symmetrically located at the two sides of feeder;Mounting plate, slidingly located in the inner slide rail of mounting frame;Closure mechanism, fixedly located on mounting plate, for driving two groups of acquisition components mutually close, to enclose feeder and carry out acquisition;Linear module, fixedly located in the inner side of mounting frame.The device is distributed on the multiple feeder of distribution network, realizes the on-line monitoring of the insulation state of each feeder, through the cooperation of linear module and closure mechanism, so that acquisition component can be automatically positioned, automatically closed, automatically stored, without manual intervention, degree of automation is high, and operation and maintenance efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical monitoring technology, specifically to an online acquisition device for insulation parameters of distributed feeder cables. Background Technology

[0002] In power grids, feeder cables are a crucial link in power transmission, and their insulation condition directly affects the safety and reliability of the power supply system. If insulation aging in feeder cables is not detected early, it can lead to major power safety accidents. Generally, companies regularly conduct real-time online monitoring of feeder cable insulation parameters (such as leakage current, zero-sequence current, and temperature) to ensure the stable operation of the power distribution system.

[0003] Currently, common cable insulation monitoring methods mainly include fixed sensor monitoring and manual inspection, with zero-sequence current transformers and temperature sensors installed at key locations. However, traditional fixed monitoring devices have low automation levels, rely on manual intervention, and cannot achieve remote automatic start / stop or periodic inspection; moreover, they lack sufficient safety protection, with sensors exposed to the outdoor environment for extended periods, affecting measurement accuracy and equipment reliability.

[0004] To address these issues, a distributed feeder cable insulation parameter online acquisition device is provided. Utility Model Content

[0005] The purpose of this invention is to provide an online acquisition device for insulation parameters of distributed feeder cables, which solves the problem that existing insulation parameter acquisition devices generally require manual operation of the current transformer opening, closing, and movement, resulting in inconvenient operation and maintenance.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] A distributed online acquisition device for cable insulation parameters of feeders, distributed at various key nodes of each feeder, includes:

[0008] The mounting frame is located below the feeder and parallel to the feeder's direction;

[0009] Two sets of acquisition components are symmetrically arranged on both sides of the feeder;

[0010] The mounting plate is slidably disposed within the inner slide rail of the mounting frame;

[0011] A closing mechanism, fixedly mounted on the mounting plate, is used to drive the two sets of acquisition components to move closer together to enclose the feeder for acquisition.

[0012] A linear module is fixedly installed on the inner side of the mounting frame and is used to drive the mounting plate to move the acquisition component along the feed line for multi-point acquisition.

[0013] As a further optimization of this utility model, the acquisition component includes a mounting base and a current transformer and a temperature sensor fixedly mounted on the mounting base. The current transformers of the two sets of acquisition components are closed to form a complete ring transformer. A control box is also fixedly mounted on the inner side of the mounting frame. The current transformer and the temperature sensor are both electrically connected to the control box.

[0014] As a further optimization of this utility model, the closing mechanism includes a fixed seat fixedly mounted on the mounting plate, a movable rod extending through the fixed seat, a second wedge block fixedly mounted at one end of the movable rod, and a fixed cylinder fixedly mounted at the other end of the movable rod; the acquisition component is mounted on the fixed cylinder, a spring is sleeved on the movable rod between the second wedge block and the fixed seat, and a plurality of first wedge blocks are fixedly mounted on the mounting frame and evenly distributed along the feed line direction, the first wedge blocks being adapted to the second wedge blocks.

[0015] As a further optimization of this utility model, it also includes: a storage box, fixedly disposed at one end of the mounting frame, having a storage cavity inside that is adapted to the acquisition component; and a flipping mechanism for driving the acquisition component to flip into the storage cavity to achieve protective storage in non-monitoring state.

[0016] As a further optimization of this utility model, a support rod is fixedly provided at the bottom of the mounting base, and a rotating cylinder is fixedly provided at the bottom end of the support rod; a rotating shaft is coaxially fixed at the end of the fixed cylinder away from the movable rod, the rotating cylinder is rotatably sleeved on the outer circumference of the rotating shaft, and a first torsion spring is provided at the end of the rotating shaft.

[0017] As a further optimization of this utility model, the flipping mechanism includes a first gear coaxially fixed to the end of the rotating cylinder and a first rack fixed to the storage box, wherein the first gear meshes with the first rack.

[0018] As a further optimization of this utility model, the top of the storage box is hinged with a cover plate, and a second torsion spring is sleeved on the end of the hinge shaft of the cover plate; the middle of the hinge shaft is provided with an opening and closing mechanism for controlling the opening and closing of the cover plate, the opening and closing mechanism includes a second gear fixedly sleeved on the hinge shaft and a second rack meshing with the second gear, a sliding groove is opened in the vertical direction inside the storage box, the second rack is slidably disposed in the sliding groove, and a pressure plate for pushing the second rack is fixedly provided on the mounting base; both sides of the cover plate are provided with warning lights and speakers.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. This utility model achieves online monitoring of the insulation status of each feeder by distributing it across multiple feeders in the power distribution network. Through the cooperation of the linear module and the closing mechanism, the acquisition component can automatically position, close, and separate without manual intervention, resulting in a high degree of automation and greatly improved operation and maintenance efficiency.

[0021] 2. The storage box and flipping mechanism of this utility model enable the device to be protected and stored in a non-monitoring state, avoiding long-term exposure of the acquisition components and aging and damage, thus extending the equipment life. At the same time, the storage state can prevent the acquisition components from interfering with the normal operation of the feeder, ensuring the stability of the power distribution network. In addition, the cover plate integrates an early warning function, and the warning light and speaker can actively issue audible and visual warnings and mechanical vision warnings when the device is abnormal, improving on-site safety. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the mounting frame structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the acquisition component and closing mechanism of this utility model;

[0025] Figure 4 This is a schematic diagram of the storage box structure of this utility model.

[0026] In the picture:

[0027] 1. Mounting frame; 101. First wedge block; 102. Control box; 2. Data acquisition component; 201. Mounting base; 202. Current transformer; 203. Temperature sensor; 204. Pressure plate; 205. Support rod; 206. Rotating cylinder; 3. Mounting plate; 4. Linear module; 5. Closing mechanism; 501. Fixed base; 502. Movable rod; 503. Second wedge block; 504. Spring; 505. Fixed cylinder; 506. Rotating shaft; 507. First torsion spring; 6. Storage box; 601. Cover plate; 602. Second torsion spring; 603. Second gear; 604. Second rack; 605. Warning light; 606. Speaker; 7. Flipping mechanism; 701. First gear; 702. First rack. Detailed Implementation

[0028] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0029] Example 1

[0030] To address the inconvenience of maintenance caused by the need for manual operation of current transformers in existing insulation parameter acquisition devices, please refer to [link to relevant documentation]. Figures 1-3 This utility model provides a distributed feeder cable insulation parameter online acquisition device, which is distributed at various key nodes of each feeder (such as each outgoing line, each branch, and important joints), including:

[0031] Mounting frame 1 is located below the feeder and parallel to the feeder's direction;

[0032] Two sets of acquisition components 2 are symmetrically arranged on both sides of the feeder to collect the ground leakage current and surface temperature of the feeder in order to calculate the insulation resistance of the feeder. The acquisition components 2 include a mounting base 201 and a current transformer 202 and a temperature sensor 203 fixed on the mounting base 201. The current transformers 202 of the two sets of acquisition components 2 are closed to form a complete ring transformer. The temperature sensors 203 of the two sets of acquisition components 2 collect the surface temperature of different sides of the cable. The temperature sensors 203 are non-contact temperature probes. For example, an infrared temperature probe can be used. An abnormal temperature rise indicates problems such as cable insulation aging and overload. A control box 102 is also fixed inside the mounting frame 1. The current transformer 202 and the temperature sensor 203 are electrically connected to the control box 102. The control box 102 is also equipped with a communication module, such as a wireless LoRa module or a wired RS485 module.

[0033] Mounting plate 3 is slidably disposed in the inner slide rail of mounting frame 1, and the end of mounting plate 3 is provided with corresponding slider;

[0034] The closing mechanism 5 is fixedly mounted on the mounting plate 3 and is used to drive the two sets of acquisition components 2 to move closer together to enclose the feed line for acquisition. The closing mechanism 5 includes a fixed base 501 fixedly mounted on the mounting plate 3, a movable rod 502 passing through the fixed base 501, a second wedge block 503 fixedly mounted on one end of the movable rod 502, and a fixed cylinder 505 fixedly mounted on the other end of the movable rod 502. The acquisition components 2 are mounted on the fixed cylinder 505. A spring 504 is sleeved on the movable rod 502 between the second wedge block 503 and the fixed base 501. A plurality of first wedge blocks 101 are fixedly mounted on the mounting frame 1 and are evenly distributed along the feed line. The first wedge blocks 101 are adapted to the second wedge blocks 503.

[0035] The linear module 4 is fixedly installed inside the mounting frame 1 and is used to drive the mounting plate 3 to move the acquisition component 2 along the feed line for multi-point acquisition. The linear module 4 can specifically adopt a ball screw drive structure.

[0036] In use, after receiving the monitoring command, the control box 102 starts the linear module 4. The linear module 4 drives the mounting plate 3 to move along the slide rail of the mounting frame 1 towards the feeder monitoring point. The mounting plate 3 simultaneously drives the closing mechanism 5 and the acquisition component 2 to move. When the mounting plate 3 drives the second wedge block 503 to contact the first wedge block 101 on the mounting frame 1, the inclined surface of the first wedge block 101 presses against the second wedge block 503, overcoming the elastic force of the spring 504 and driving the movable rod 502 to move radially along the feeder. The movable rod 502 drives the two sets of acquisition components 2 to move closer to each other through the fixed cylinder 505 until the two sets of current transformers 20 2. The feeder is closed to form a complete loop. At this time, the current transformer 202 collects the zero-sequence current signal of the feeder, and the temperature sensor 203 collects the surface temperature signal of the feeder. The signal is transmitted to the control box 102, which can upload it to the background monitoring system through the communication module. After the current monitoring point is collected, the linear module 4 continues to drive the mounting plate 3 to move. The second wedge block 503 disengages from the first wedge block 101. The spring 504 resets and drives the movable rod 502 to separate the acquisition component 2. The mounting plate 3 drives the acquisition component 2 to move to the next monitoring point. The closing acquisition steps are repeated to realize multi-point acquisition along the feeder.

[0037] Example 2

[0038] Based on Example 1, in order to protect the acquisition component 2 in a non-monitoring state and extend the device lifespan, such as... Figure 1 , Figures 3-4 As shown, it also includes:

[0039] The storage box 6 is fixedly installed at one end of the mounting frame 1, and its interior has a storage cavity that is compatible with the collection component 2.

[0040] The flipping mechanism 7 is used to drive the acquisition component 2 to flip into the storage cavity, so as to achieve protective storage in the non-monitoring state and avoid long-term exposure of the acquisition component 2 to damage from external forces.

[0041] A support rod 205 is fixedly provided at the bottom of the mounting base 201, and a rotating cylinder 206 is fixedly provided at the bottom end of the support rod 205; a rotating shaft 506 is coaxially fixed at the end of the fixed cylinder 505 away from the movable rod 502, and the rotating cylinder 206 is rotatably sleeved on the outer circumference of the rotating shaft 506, and a first torsion spring 507 is provided at the end of the rotating shaft 506. The first torsion spring 507 is used to ensure that the acquisition component 2 is in the vertical direction when the flipping mechanism 7 is not in operation.

[0042] The flipping mechanism 7 includes a first gear 701 coaxially fixed to the end of the rotating cylinder 206 and a first rack 702 fixed to the storage box 6. The first gear 701 and the first rack 702 mesh with each other. When the mounting plate 3 moves the collection component 2 to the storage box 6, the first gear 701 meshes with the first rack 702, driving the rotating cylinder 206 to flip the collection component 2.

[0043] The top of the storage box 6 is hinged with a cover plate 601, and a second torsion spring 602 is sleeved on the end of the hinge shaft of the cover plate 601. The middle of the hinge shaft is provided with an opening and closing mechanism for controlling the opening and closing of the cover plate 601. The opening and closing mechanism includes a second gear 603 fixedly sleeved on the hinge shaft and a second rack 604 meshing with the second gear 603. A sliding groove is opened in the vertical direction inside the storage box 6, and the second rack 604 is slidably disposed in the sliding groove. A pressure plate 204 for pushing the second rack 604 is fixedly provided on the mounting base 201. Warning lights 605 and speakers 606 are provided on both sides of the cover plate 601. The warning lights 605 and speakers 606 are electrically connected to the control box 102. The surface of the cover plate 601 is also provided with physical warning signs, such as high voltage warning symbols and text made of reflective material.

[0044] After the data collection is completed, the linear module 4 drives the mounting plate 3 to move the data collection component 2 toward the storage box 6. When the first gear 701 meshes with the first rack 702, the first rack 702 drives the first gear 701 to rotate the rotating cylinder 206. The data collection component 2 flips around the rotating shaft 506 and enters the storage cavity. When the data collection component 2 is about to enter the storage cavity, the pressure plate 204 contacts the top of the second rack 604 and generates downward pressure as the data collection component 2 continues to flip, pushing the second rack 604 to slide downward. The second rack 604 drives the second gear 603 to rotate the hinge shaft of the cover plate 601, thereby driving the cover plate 601 to rotate around the hinge shaft from the vertically open state to the horizontally closed state.

[0045] Meanwhile, the torque generated by the second torsion spring 602 of the cover plate 601 allows the cover plate 601 to be in a vertically open state when the acquisition component 2 is acquiring data. This allows the warning lights 605 and speakers 606 on both sides of the cover plate 601 to be fully exposed to the external view. When the feeder has an insulation abnormality, the warning lights 605 and speakers 606 will emit an audible and visual warning to ensure that the fault area is within the effective warning range and to prevent personnel from accidentally approaching and causing safety risks.

[0046] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A distributed feeder cable insulation parameter online acquisition device, distributed at various key nodes of each feeder, characterized in that, include: The mounting frame (1) is located below the feeder and parallel to the feeder direction; Two sets of acquisition components (2) are symmetrically arranged on both sides of the feed line; The mounting plate (3) is slidably disposed in the inner slide rail of the mounting frame (1); The closing mechanism (5) is fixed on the mounting plate (3) and is used to drive the two sets of acquisition components (2) to move closer to each other to enclose the feeder for acquisition. The linear module (4) is fixedly installed on the inner side of the mounting frame (1) and is used to drive the mounting plate (3) to move the acquisition component (2) along the feed line to perform multi-point acquisition.

2. The distributed feeder cable insulation parameter online acquisition device according to claim 1, characterized in that, The acquisition component (2) includes a mounting base (201) and a current transformer (202) and a temperature sensor (203) fixed on the mounting base (201). The current transformers (202) of the two sets of acquisition components (2) are closed to form a complete ring transformer. A control box (102) is also fixedly installed on the inner side of the mounting frame (1), and the current transformer (202) and the temperature sensor (203) are both electrically connected to the control box (102).

3. The distributed feeder cable insulation parameter online acquisition device according to claim 2, characterized in that, The closing mechanism (5) includes a fixed seat (501) fixed on the mounting plate (3), a movable rod (502) passing through the fixed seat (501), a second wedge block (503) fixed at one end of the movable rod (502), and a fixed cylinder (505) fixed at the other end of the movable rod (502). The acquisition component (2) is mounted on the fixed cylinder (505). A spring (504) is sleeved on the movable rod (502) between the second wedge block (503) and the fixed seat (501). A plurality of first wedge blocks (101) are fixedly arranged along the feed line direction at equal intervals on the mounting frame (1). The first wedge block (101) is adapted to the second wedge block (503).

4. The distributed feeder cable insulation parameter online acquisition device according to claim 3, characterized in that, Also includes: The storage box (6) is fixedly installed at one end of the mounting frame (1), and its interior has a storage cavity adapted to the collection component (2); The flipping mechanism (7) is used to drive the acquisition component (2) to flip into the storage cavity to achieve protective storage in the non-monitoring state.

5. The distributed feeder cable insulation parameter online acquisition device according to claim 4, characterized in that, The bottom of the mounting base (201) is fixedly provided with a support rod (205), and the bottom end of the support rod (205) is fixedly provided with a rotating cylinder (206). The fixed cylinder (505) is coaxially fixed with a rotating shaft (506) at one end away from the movable rod (502). The rotating cylinder (206) is rotatably sleeved on the outer circumference of the rotating shaft (506), and a first torsion spring (507) is provided at the end of the rotating shaft (506).

6. The distributed feeder cable insulation parameter online acquisition device according to claim 5, characterized in that, The flipping mechanism (7) includes a first gear (701) coaxially fixed at the end of the rotating cylinder (206) and a first rack (702) fixed on the storage box (6), wherein the first gear (701) meshes with the first rack (702).

7. The distributed feeder cable insulation parameter online acquisition device according to claim 5, characterized in that, The top of the storage box (6) is hinged with a cover plate (601), and a second torsion spring (602) is sleeved on the end of the hinge shaft of the cover plate (601). The hinge shaft is provided with an opening and closing mechanism for controlling the opening and closing of the cover plate (601). The opening and closing mechanism includes a second gear (603) fixedly sleeved on the hinge shaft and a second rack (604) meshing with the second gear (603). The storage box (6) is provided with a sliding groove in the vertical direction. The second rack (604) is slidably disposed in the sliding groove. The mounting base (201) is fixedly provided with a pressure plate (204) for pushing the second rack (604). Warning lights (605) and loudspeakers (606) are provided on both sides of the cover plate (601).

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