An apparatus for power distribution network line fault location

Abstract

The application relates to the technical field of power grid fault detection, and discloses a device for power distribution network line fault positioning, which comprises an upper sensing and signal processing unit and a lower power supply unit, characterized in that: a heat dissipation groove is arranged on the lower power supply unit, a filter screen cylinder driven by a motor is arranged in the heat dissipation groove, and a cleaning brush in contact with the filter screen cylinder is arranged on at least one side of the heat dissipation groove; when working, the filter screen cylinder is driven to rotate by the motor, the filter screen cylinder is in contact with the cleaning brush, and dust attached to the filter screen cylinder is cleaned and removed by the cleaning brush; according to the application, the dust can be cleaned in time through the arrangement of the cleaning brush and the rotation of the filter screen cylinder, the filter screen clogging problem is effectively solved, and the heat dissipation effect is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of power grid fault detection technology, and in particular to a device for locating faults in distribution network lines. Background Technology

[0002] As a crucial component of the power system, the rapid and accurate location of line faults in the distribution network is essential for ensuring power supply reliability. Traveling wave fault location devices are widely used line fault detection equipment in distribution networks, typically divided into an upper sensing and signal processing unit and a lower power supply unit based on functional module differences. The upper sensing and signal processing unit is responsible for core tasks such as acquiring, conditioning, and locating traveling wave signals, while the lower power supply unit bears the critical responsibility of providing stable power to the entire device.

[0003] The lower power supply unit typically integrates multiple power modules, with common configurations including dual-redundant power supply components (solar power + lithium battery) and power management circuits to adapt to the complex and variable power supply environment outdoors. Since the power modules continuously generate heat during charging, discharging, and continuous power supply, especially in high-temperature outdoor environments, heat can accumulate rapidly. If this heat cannot be dissipated in time, it will severely affect power supply stability and even damage internal electronic components. Therefore, existing traveling wave fault location devices usually have heat dissipation holes on the housing of the lower power supply unit to achieve natural heat dissipation. Additionally, to prevent outdoor dust from entering the unit through these holes and contaminating or damaging electronic components, filters are generally installed at the heat dissipation holes.

[0004] However, the existing "heat dissipation holes + filter" heat dissipation and protection design has significant drawbacks: outdoor environments contain a lot of dust, sand, and other impurities. Over time, these impurities gradually accumulate on the filter, causing the filter holes to become clogged. Once the filter is clogged, the ventilation efficiency of the heat dissipation holes decreases significantly, and the heat generated by the lower power supply unit cannot be dissipated in time. This leads to an increase in internal temperature, which not only reduces the operational stability and lifespan of the power module but may also cause overall device failure. It also affects the accuracy and timeliness of fault location in the power distribution network, posing a threat to the safe and stable operation of the power distribution network.

[0005] Therefore, there is an urgent need for a device for locating faults in power distribution lines that can solve the problem of filter clogging and ensure heat dissipation. Summary of the Invention

[0006] The purpose of this invention is to provide a device for locating faults in power distribution lines. By using a cleaning brush and rotating a filter cylinder, dust can be removed in a timely manner, effectively solving the problem of filter clogging and ensuring heat dissipation.

[0007] The invention adopts the following technical solution: A device for locating faults in power distribution network lines includes an upper sensing and signal processing unit and a lower power supply unit. The lower power supply unit is characterized by a heat dissipation groove, within which a motor-driven filter cylinder is installed. At least one side of the heat dissipation groove is provided with a cleaning brush that contacts the filter cylinder. During operation, as the motor drives the filter cylinder to rotate, the filter cylinder contacts the cleaning brush, and dust adhering to it is cleaned and removed by the cleaning brush.

[0008] Preferably, the filter screen is provided on both symmetrical sides of the filter cylinder, and the remaining parts are sealed; wherein the width of the filter screen is not greater than the width of the heat dissipation groove.

[0009] Preferably, a desiccant is provided inside the filter cylinder.

[0010] Preferably, a receiving screen cylinder is rotatably disposed inside the filter screen cylinder, the outer diameter of the receiving screen cylinder matching the inner diameter of the filter screen cylinder, the receiving screen cylinder being divided into multiple sets of symmetrically arranged receiving cavities, and the desiccant being located in the receiving cavities; a hollow cylindrical receiving sleeve is formed in the middle of the receiving screen cylinder, the receiving sleeve being rotatably connected to a support shaft disposed inside the filter screen cylinder; through holes are provided at the upper and lower ends of the support shaft at positions corresponding to the filter screen; a drainage hole is provided between each set of two receiving cavities on the receiving sleeve; the receiving screen cylinder is driven by a power mechanism.

[0011] Preferably, the power mechanism is the motor that drives the filter cylinder to rotate; the receiving sleeve extends out from one end of the filter cylinder and is rotatably connected to the end of the filter cylinder, and a ratchet is coaxially fixed on it, and the end of the filter cylinder is elastically provided with ratchet teeth that mesh with the ratchet; the receiving sleeve is driven to rotate by the motor.

[0012] Preferably, a rotating shaft is fixedly provided at the end of the filter cylinder away from the ratchet, and a non-circular first positioning shaft is elastically provided inside the rotating shaft. A first positioning sleeve is rotatably provided inside the heat dissipation groove, and a first positioning groove matching the first positioning shaft is provided inside the first positioning sleeve. The motor is connected to a second positioning sleeve, and a second positioning groove is provided inside the second positioning sleeve. A second positioning shaft matching the second positioning groove is provided at the end of the receiving sleeve located outside the filter cylinder.

[0013] Preferably, one end of the filter screen cylinder is detachably provided with an end cap, and the rotating shaft is disposed on the end cap.

[0014] Preferably, the cleaning brushes are provided in two sets, symmetrically arranged on both sides of the heat dissipation groove.

[0015] Preferably, the heat dissipation groove is located at the bottom of the lower power supply unit.

[0016] Preferably, the arc length of the end of the receiving cavity away from the receiving sleeve is not less than the arc length corresponding to the filter screen.

[0017] Compared with existing technologies, the beneficial effects of this invention are as follows: By installing a motor-driven filter cylinder within the heat dissipation slot of the lower power supply unit, and pairing it with a contact-type cleaning brush, the filter cylinder rotates under the drive of the motor during operation, forming continuous frictional contact with the cleaning brush. This periodically cleans dust, sand, and other impurities adhering to the filter cylinder, fundamentally avoiding the defects of traditional fixed filters that easily accumulate dust and become clogged after long-term use, ensuring that the ventilation path of the heat dissipation slot remains unobstructed. With the filter cylinder kept clean and unobstructed, the heat generated by the power module in the lower power supply unit can be promptly dissipated through the heat dissipation slot, effectively controlling the internal operating temperature and preventing problems such as decreased stability and shortened lifespan of the power module due to high temperatures. This, in turn, ensures the continuous and stable operation of the power supply unit, providing reliable power support for the core functions of the entire fault location device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 A schematic diagram of the flipped structure; Figure 3 This is a schematic diagram of the structure of the filter cylinder of the present invention; Figure 4 This is a front view of the accommodating mesh tube of the present invention; Figure 5 This is the main image of the filter cylinder of the present invention; Figure 6 for Figure 2 A magnified view of A in the middle. Detailed Implementation

[0019] The invention will now be described clearly and completely with reference to the accompanying drawings and embodiments: like Figures 1 to 6As shown, the device for fault location in power distribution network lines according to the invention includes an upper sensing and signal processing unit 1 and a lower power supply unit 2. The lower power supply unit 2 is equipped with a heat dissipation trough 3, located at the bottom of the lower power supply unit 2 to prevent rainwater backflow during rainy weather. A motor-driven filter cylinder 4 is installed inside the heat dissipation trough 3. At least one side of the heat dissipation trough 3 is equipped with cleaning brushes 5 that contact the filter cylinder 4. Preferably, two sets of cleaning brushes 5 are symmetrically arranged on both sides of the heat dissipation trough 3. During operation, as the motor drives the filter cylinder 4 to rotate, the filter cylinder 4 contacts the cleaning brushes 5, and the dust adhering to it is cleaned and removed by the cleaning brushes 5. This ensures the unobstructed flow of the filter cylinder 4, allowing the heat generated by the power module in the lower power supply unit 2 to be dissipated in a timely manner through the heat dissipation trough 3. This effectively controls the internal operating temperature and avoids problems such as decreased stability and shortened lifespan of the power module due to high temperatures, thereby ensuring the continuous and stable operation of the power supply unit and providing reliable power support for the core functions of the entire fault location device. Meanwhile, the filter screen does not require frequent manual disassembly and cleaning, which greatly reduces the maintenance frequency and labor costs of outdoor equipment. The simple and reliable structural design is suitable for complex and dusty outdoor environments, extending the overall service life of the device.

[0020] Furthermore, filter screens 6 are provided on the symmetrical two sides of the filter cylinder 4, while the rest of the parts are sealed. This arrangement facilitates the rotation of the filter cylinder 4 by the motor when the external airflow is humid, rainy weather is detected, or the humidity inside the device is high. This causes the filter screens 6 to move away from the heat dissipation groove 3, thereby blocking the heat dissipation groove 3 and preventing external moisture from entering the device. At this time, a humidity sensor can be installed in the device as needed. The humidity sensor is connected to the processing module inside the device to control the motor to start and stop according to the humidity requirements. The width of the filter screen 6 is not greater than the width of the heat dissipation groove 3, preferably the same as the width of the heat dissipation groove 3, while the width of the heat dissipation groove 3 is not greater than one-quarter of the arc length of the surface of the filter cylinder 4. This ensures the heat dissipation effect while the heat dissipation groove 3 can be blocked by the sealing structure through the rotation of the filter cylinder 4.

[0021] Furthermore, a desiccant 7 is installed inside the filter cylinder 4. The desiccant 7 can be a molecular sieve desiccant, which has advantages such as good adsorption performance, stable chemical properties, and resistance to pulverization. The desiccant 7 can reduce the moisture content in the airflow entering through the filter cylinder 4, preventing it from entering the lower power supply unit 2 and causing short circuits or other adverse problems, thus ensuring its stable operation.

[0022] Preferably, a receiving mesh cylinder 8 is rotatably disposed inside the filter cylinder 4. The outer side of the receiving mesh cylinder 8 is an integral cylindrical mesh cylinder structure, and the outer diameter of the receiving mesh cylinder 8 matches the inner diameter of the filter cylinder 4. The receiving mesh cylinder 8 is divided into multiple sets of symmetrically arranged receiving cavities 9, and the desiccant 7 is located in the receiving cavities 9. A hollow cylindrical receiving sleeve 10 is formed in the middle of the receiving mesh cylinder 8. The receiving sleeve 10 is rotatably connected to the support shaft 11 fixedly disposed inside the filter cylinder 4, so that by periodically rotating the receiving mesh cylinder 8, different sets of receiving cavities 9 can be matched with the filter screen 6, thereby achieving the purpose of periodically replacing the desiccant 7, ensuring the drying effect, and reducing the need for frequent disassembly of the receiving cylinder for drying. The workload caused by replacing the desiccant 7 is reduced; through holes 12 are provided at the upper and lower ends of the support shaft 11 corresponding to the positions of the filter screen 6 to facilitate the smooth passage of airflow; a drainage hole 13 is provided between each group of two accommodating cavities 9 on the accommodating sleeve 10 so that when the accommodating screen cylinder 8 is rotated, the drainage hole 13 corresponds to the through hole 12 on the support shaft 11 to allow airflow; mesh plates are provided on the drainage hole 13 and the through hole 12 on the support shaft 11 to ensure the airflow while intercepting the desiccant 7, ensuring that the desiccant 7 does not fall out in the accommodating cavity 9; the accommodating cylinder is driven by a power mechanism, which can be achieved by adding an additional motor. Alternatively, the motor that drives the filter screen cylinder 4 in this application can be used to drive it, which can save manufacturing costs and installation space. In addition, in this embodiment, the arc length of the end of the accommodating cavity 9 away from the accommodating sleeve 10 is not less than the arc length corresponding to the filter screen 6 to ensure the heat dissipation area. Preferably, the arc length of the end of the accommodating cavity 9 away from the accommodating sleeve 10 matches the arc length of the filter screen 6.

[0023] Specifically, in this application, the power mechanism is a motor that drives the filter cylinder 4 to rotate; the receiving sleeve 10 extends from one end of the filter cylinder 4 and is rotatably connected to the end of the filter cylinder 4; a ratchet 14 is coaxially fixedly mounted on the portion of the receiving sleeve 10 outside the filter cylinder 4, and ratchet teeth 15 that mesh with the ratchet 14 are elastically provided at the end of the filter cylinder 4; the receiving sleeve 10 is driven to rotate by the motor. During operation, refer to... Figure 5 As shown, when the motor rotates in the forward direction, the receiving screen cylinder 8 and the filter screen cylinder 4 rotate synchronously under the limit of the ratchet 15. At this time, the filter screen cylinder 4 is adjusted, and the positional relationship between the receiving screen cylinder 8 and the filter screen cylinder 4 remains unchanged. When the motor rotates in the reverse direction, the receiving sleeve 10 drives the receiving screen cylinder 8 to rotate, thereby completing the switching of different receiving cavities 9 relative to the filter screen 6, so as to periodically replace the desiccant 7 corresponding to the filter screen 6, ensure the drying effect of the airflow, and extend the replacement frequency of the desiccant 7.

[0024] In addition, a rotating shaft 16 is fixedly installed at the end of the filter cylinder 4 away from the ratchet 14. A non-circular first positioning shaft 17 is elastically installed inside the rotating shaft 16 via a spring. A first positioning sleeve is rotatably installed inside the heat dissipation groove 3 via a bearing. A first positioning groove matching the first positioning shaft 17 is provided inside the first positioning sleeve. A second positioning sleeve is installed at the end of the heat dissipation groove 3 opposite to the first positioning sleeve. The motor is connected to the second positioning sleeve. A second positioning groove is provided inside the second positioning sleeve. A second positioning shaft 18 matching the second positioning groove is provided at the end of the receiving sleeve 10 located outside the filter cylinder 4. The non-circular first positioning shaft 17 elastically installed inside the rotating shaft 16 via a spring facilitates the installation and removal of the filter cylinder 4 in the heat dissipation groove 3. During installation, the end of the elastically installed first positioning shaft 17 is first inserted into the first positioning sleeve. As the filter cylinder 4 is pushed, the first positioning shaft 17 will be moved into the rotating shaft 16 under force, thereby providing space for the installation of the second positioning shaft 18.

[0025] The second positioning shaft 18 has the same structure as the first positioning shaft 17, both having a non-circular structure to prevent slippage between the first positioning shaft 17 and the first positioning sleeve, and between the second positioning shaft 18 and the second positioning sleeve during rotation. In this embodiment, the first and second positioning sleeves are not shown in the figures.

[0026] Furthermore, one end of the filter cylinder 4 is detachably equipped with an end cap 19. The end cap 19 can be connected to the filter cylinder 4 by thread or bolts, and the rotating shaft 16 is mounted on the end cap 19. The end cap 19 facilitates the removal of the filter cylinder 4 for replacement of the desiccant 7 inside. In this case, the support shaft is only faulty on one end of the filter cylinder, away from the end cap, to avoid affecting the removal of the end cap. Alternatively, a support groove can be provided on the inner wall of the end cap 19. When the end cap 19 is fixed to the filter cylinder with bolts, the support groove fits around the support shaft to provide support. The specific configuration can be flexibly matched according to actual needs.

[0027] This invention uses a motor to drive the filter cylinder 4 to rotate periodically. A cleaning brush 5, located within the heat dissipation groove 3, promptly removes dust adhering to the filter screen 6, ensuring airflow through the mesh and maximizing heat dissipation. A receiving mesh cylinder 8 is installed inside the filter cylinder 4, and this 8 is divided into multiple receiving cavities 9. This allows for the placement of a desiccant 7 within these cavities to dry the incoming airflow, preventing short circuits and other malfunctions within the device. The rotation of the filter cylinder 4 and the receiving mesh cylinder 8 can be controlled by the forward and reverse rotation of the motor, enabling the closure of the heat dissipation groove 3 or the switching of the desiccant 7. The invention is structurally convenient, easy to operate, and highly practical.

Claims

1. A device for fault location in power distribution network lines, comprising an upper sensing and signal processing unit and a lower power supply unit, characterized in that: The lower power supply unit is provided with a heat dissipation groove, and a motor-driven filter cylinder is provided in the heat dissipation groove. At least one side of the heat dissipation groove is provided with a cleaning brush that contacts the filter cylinder. During operation, as the motor drives the filter cylinder to rotate, the filter cylinder contacts the cleaning brush, and the dust attached to it is cleaned and removed by the cleaning brush.

2. The device for fault location in power distribution network lines according to claim 1, characterized in that: The filter cylinder has filter screens on its two symmetrical sides, and the rest of the parts are sealed; the width of the filter screen is not greater than the width of the heat dissipation groove.

3. The device for fault location in power distribution network lines according to claim 2, characterized in that: The filter cylinder contains a desiccant.

4. The device for fault location in power distribution network lines according to claim 3, characterized in that: The filter cylinder contains a rotatable receiving cylinder, the outer diameter of which matches the inner diameter of the filter cylinder. The receiving cylinder is divided into multiple sets of symmetrically arranged receiving cavities, and the desiccant is located within each receiving cavity. A hollow cylindrical receiving sleeve is formed in the middle of the receiving cylinder, and the receiving sleeve is rotatably connected to a support shaft disposed within the filter cylinder. Through holes are provided at the upper and lower ends of the support shaft at positions corresponding to the filter screen. A drainage hole is provided between each set of two receiving cavities on the receiving sleeve. The receiving cylinder is driven by a power mechanism.

5. The device for fault location in power distribution network lines according to claim 4, characterized in that: The power mechanism is the motor that drives the filter cylinder to rotate; the receiving sleeve extends out from one end of the filter cylinder and is rotatably connected to the end of the filter cylinder, and a ratchet is coaxially fixed on it, and the end of the filter cylinder is elastically provided with ratchet teeth that mesh with the ratchet; the receiving sleeve is driven to rotate by the motor.

6. The device for fault location in power distribution network lines according to claim 5, characterized in that: The filter cylinder has a fixed rotating shaft at one end away from the ratchet. A non-circular first positioning shaft is elastically provided inside the rotating shaft. A first positioning sleeve is rotatably provided inside the heat dissipation groove. A first positioning groove matching the first positioning shaft is provided inside the first positioning sleeve. The motor is connected to a second positioning sleeve. A second positioning groove is provided inside the second positioning sleeve. A second positioning shaft matching the second positioning groove is provided at one end of the receiving sleeve located outside the filter cylinder.

7. The device for fault location in power distribution network lines according to claim 6, characterized in that: The filter screen cylinder is detachably provided with an end cap at one end, and the rotating shaft is disposed on the end cap.

8. The device for fault location in power distribution network lines according to claim 1, characterized in that: The cleaning brushes are provided in two sets, symmetrically arranged on both sides of the heat dissipation groove.

9. The device for fault location in power distribution network lines according to claim 1, characterized in that: The heat dissipation slot is located at the bottom of the lower power supply unit.

10. The device for fault location in power distribution network lines according to claim 4, characterized in that: The arc length of the end of the receiving cavity away from the receiving sleeve is not less than the arc length corresponding to the filter screen.

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