An indicator for power distribution network fault location

Abstract

The present application relates to the technical field of power distribution network fault indication, and discloses an indicator for power distribution network fault positioning, which comprises overhead cables, an indicator mechanism installed on the overhead cables close to the tower line section, a front end blocking mechanism installed at the front end of the indicator mechanism, a rear end blocking mechanism installed at the rear end of the indicator mechanism, and a shielding mechanism arranged outside the front end blocking mechanism and the rear end blocking mechanism. The shielding mechanism comprises a shielding outer cylinder, a top glass plate fixedly installed in the notch at the top of the shielding outer cylinder, and a bottom glass plate fixedly installed in the notch at the bottom of the shielding outer cylinder. The outer surfaces of the top glass plate and the bottom glass plate are respectively attached to corresponding brushes, which are used for self-adaptive cleaning of the light transmission part. The fully-closed shielding structure provides protection for the indicator mechanism against electromagnetic, high temperature, high humidity and rainwater scouring, and cooperates with the bottom air inlet and exhaust to realize temperature control and heat dissipation in the sealed cavity, thereby effectively improving the safety, service life and alarm accuracy of the fault positioning indicator.

Description

Technical Field

[0001] This invention relates to the field of power distribution network fault indication technology, specifically to an indicator for locating power distribution network faults. Background Technology

[0002] A power distribution network fault location indicator is a power monitoring device installed at overhead lines and cable branches in a power distribution network. It can detect sudden changes in current and voltage in the line in real time. When a short circuit or grounding fault occurs in the line, it can directly issue a fault alarm through visual methods such as flipping signs and lighting up lights, helping maintenance personnel to quickly locate the fault section.

[0003] The fault location indicators of the distribution network installed in different regions have certain drawbacks during actual operation. When the segmented and zoned power grid is close to the urban area, the fault location indicator is easily affected by electromagnetic interference, which affects its accuracy. When the power grid is located in a harsh environment, the fault location indicator is exposed and easily affected by high temperature, high humidity and heavy rainfall. In severe cases, it may further damage its internal units, thus affecting the service life of the fault location indicator and causing false alarms to occur frequently.

[0004] In view of this, an indicator for fault location in power distribution networks was designed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an indicator for fault location in power distribution networks, which has high safety, service life and accuracy.

[0006] To achieve the above objectives, the present invention provides an indicator for fault location in a power distribution network, including an overhead cable, an indicator mechanism installed on the overhead cable near the tower section, a front sealing mechanism installed at the front end of the indicator mechanism, a rear sealing mechanism installed at the rear end of the indicator mechanism, and a shielding mechanism disposed outside the front sealing mechanism and the rear sealing mechanism.

[0007] The shielding mechanism includes a shielding outer cylinder that is fixedly installed outside the first stud by a nut, and the shielding outer cylinder is inserted into the outside of the two first shielding pads and the two second shielding pads. A top glass plate is fixedly installed in the slot at the top of the shielding outer cylinder, and a bottom glass plate is fixedly installed in the slot at the bottom of the shielding outer cylinder.

[0008] The outer surface of the top glass plate is adapted to be attached to the brush plate inside the top brush tool, and the outer surface of the bottom glass plate is adapted to be attached to the brush plate inside the bottom brush tool.

[0009] Preferably, a third stud and a base are fixedly installed on the outer wall of the shielding outer cylinder near the rear sealing mechanism. A rod is inserted into the base, and a pressure block is movably installed on the outside of the rod. An elliptical groove is provided in the middle of the pressure block. The pressure block is fixed to the third stud by a nut so as to straighten and tighten the two sets of guide rods and the outer frame.

[0010] Preferably, an air intake hood is fixedly installed inside the pipe section at the bottom of the shielding outer cylinder, a filter element is installed inside the air intake hood, a waterproof cover is installed at the bottom of the air intake hood, and two symmetrically distributed second filter screens are installed in two holes on the outer wall of the waterproof cover, and a desiccant filter element is inserted into the inside of the waterproof cover.

[0011] A control module is fixedly installed at the bottom of the inner cavity of the outer shielding cylinder. A motor is fixedly installed inside the control module. The motor is equipped with fan blades, and the rotor rod segment inside the motor is adapted to be inserted into the hole in the middle of the filter element.

[0012] Preferably, the indicator mechanism includes a bottom housing and a top housing clamped to the outside of the overhead cable. The bottom housing has a wiring hole at its bottom and an indicator light is fixedly installed at its bottom. The top housing has three rectangular pre-installed holes, and photovoltaic modules are fixedly installed in the rectangular pre-installed holes.

[0013] Preferably, the front-end sealing mechanism includes two first positioning shells fixedly installed at the front end of the bottom shell and the top shell by multiple bolts, and the outer wall of the first positioning shell is provided with evenly distributed corrugated slots. After closing, the two first positioning shells are engaged with the outside of the first hexagonal end. The inner wall of the first hexagonal end is provided with multiple evenly distributed arc-shaped protrusions, and the two first positioning shells are provided with a first protective tube.

[0014] Two symmetrically distributed first shielding pads are installed in the annular groove of the inner pipe section of the first hexagonal end, and the two first shielding pads are fixed by two first combination bolts after closing. A first stud is provided on the outer side of the first shielding pad.

[0015] The flange at the outer end of the first protective tube is fixedly installed on the stud on the outer side of the first hexagonal end by a nut.

[0016] Preferably, the rear sealing mechanism includes two second positioning shells fixedly installed at the rear ends of the bottom shell and the top shell by multiple bolts. The second positioning shells have the same structure as the first positioning shells. After closing, the two second positioning shells are snapped with second hexagonal ends on the outside. The second hexagonal ends have the same structure as the first hexagonal ends. The two second positioning shells are provided with second protective tubes inside.

[0017] Two symmetrically distributed second shielding pads are installed in the annular groove of the inner pipe section of the second hexagonal end, and the two second shielding pads are fixed by two second combination bolts. Limiting holes are opened in the second shielding pads, and after closing, a light shield is fixedly installed on the inner side of the two second shielding pads.

[0018] The flange at the outer end of the second protective tube is fixedly installed on the stud on the outer side of the second hexagonal end by a nut.

[0019] Preferably, a U-shaped groove is provided on the top of the inner side of the second shielding pad, and an exhaust hood is fixedly installed in the U-shaped groove. An inclined first filter screen is fixedly installed inside the exhaust hood.

[0020] Preferably, two second studs are symmetrically distributed at the top and bottom of the outer side of the second shielding pad, and a top pad is installed on one of the second studs. Two guide rods are fixedly installed inside the top pad, and an outer frame is movably installed at the outer end of the guide rod. A top brush is fixedly installed at the other end of the outer frame.

[0021] Preferably, the rear sealing mechanism further includes a bottom pad installed on another second stud, wherein two crossbars are fixedly installed inside the bottom pad, and bottom brushes are fixedly installed at the outer ends of the two crossbars; the bottom pad and the top pad have the same structure.

[0022] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows:

[0023] 1. This invention provides electromagnetic, high-temperature, and rain protection to the fault location of the existing power distribution network fault location indicator by setting a fully enclosed shielding structure on the outside. This ensures the safety of the fully enclosed power distribution network fault location indicator in urban or harsh environments, effectively improves its service life, enhances its alarm accuracy, and reduces the frequent false alarms of traditional exposed power distribution network fault location indicators.

[0024] 2. This invention improves the fault location indicator's resistance to electromagnetic and environmental interference factors by setting an air intake at the bottom of the fully enclosed structure and using the power distribution network control terminal to control the temperature inside the sealed cavity where the fault location indicator is located in real time. At the same time, it ensures that the fault location indicator maintains high operating efficiency according to changes in season and climate.

[0025] 3. This invention provides two brushes outside two light-transmitting areas reserved within a fully enclosed shielding structure. This fully enclosed shielding structure not only enhances the protection of the power distribution network fault location indicator but also facilitates rapid opening and closing. During the regular opening and closing process, the two brushes adaptively clean the two light-transmitting areas, thereby improving the device's high light transmittance and enabling maintenance personnel to effectively observe the fault area. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is a schematic diagram illustrating the usage state of the product provided in one embodiment of the present invention;

[0028] Figure 2 for Figure 1 A 3D schematic diagram of the product shown;

[0029] Figure 3 for Figure 2 A diagram showing the view from below;

[0030] Figure 4 for Figure 1 An exploded view of the product shown.

[0031] Figure 5 for Figure 1 A schematic diagram of the shielding mechanism in the product shown;

[0032] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0033] Figure 7 for Figure 1 A cross-sectional view of the air intake hood in the product shown.

[0034] Figure 8 for Figure 1 A schematic diagram of the structure of the product shown.

[0035] Figure 9 for Figure 1 A schematic diagram of the front-end sealing mechanism in the product shown;

[0036] Figure 10 for Figure 1 A schematic diagram of the back-end sealing mechanism in the product shown;

[0037] Figure 11 For the present invention Figure 10 Enlarged view of point B in the middle;

[0038] Figure 12 For the present invention Figure 10 An explosion diagram.

[0039] Figures 1 to 12 The accompanying figure labels are as follows:

[0040] 100. Overhead cables;

[0041] 200, Indicator mechanism; 210, Bottom housing; 2101, Wiring hole; 2102, Indicator light; 220, Top housing; 230, Photovoltaic module;

[0042] 300. Front-end sealing mechanism; 310. First protective tube; 320. First hexagonal end; 330. First shielding pad; 3301. First stud; 340. First combination bolt; 350. First positioning shell;

[0043] 400. Rear end sealing mechanism; 410. Second protective tube; 420. Second hexagonal end; 430. Second shielding pad; 4301. Second stud; 4302. Limiting hole; 4303. Light shield; 440. Second combination bolt; 450. Second positioning shell; 460. Exhaust hood; 4601. First filter screen; 470. Top pad; 4701. Guide rod; 4702. Outer frame; 4703. Top brush; 480. Bottom pad; 4801. Crossbar; 4802. Bottom brush;

[0044] 500, Shielding mechanism; 510, Shielding outer cylinder; 5101, Third stud; 5102, Base; 5103, Insert rod; 5104, Pressure block; 520, Top glass plate; 530, Bottom glass plate; 540, Air inlet cover; 5401, Filter element; 550, Waterproof cover; 5501, Second filter screen; 5502, Dehumidifying filter element; 560, Control module; 5601, Motor; 5602, Fan blade. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] The following describes, with reference to the accompanying drawings, an indicator for fault location in a power distribution network provided by some embodiments of the present invention.

[0047] Combination Figures 1 to 12As shown, the present invention provides an indicator for fault location in a power distribution network, comprising an overhead cable 100, an indicator mechanism 200 installed on the overhead cable 100 near the tower section, a front sealing mechanism 300 installed at the front end of the indicator mechanism 200, a rear sealing mechanism 400 installed at the rear end of the indicator mechanism 200, and a shielding mechanism 500 disposed outside the front sealing mechanism 300 and the rear sealing mechanism 400. The front sealing mechanism 300 and the rear sealing mechanism 400 are used to provide a support carrier for the shielding mechanism 500, and the supported shielding mechanism 500 is used to provide protection for the indicator mechanism 200 against electromagnetic interference, high temperature, high humidity and rain erosion. The indicator mechanism 200, which is in a fully enclosed shielding cavity, has improved resistance and can also achieve real-time temperature control and heat dissipation in the sealed cavity, which facilitates the indicator mechanism 200 to always be in high operating efficiency.

[0048] Specifically, the overhead cable 100 is installed between two adjacent towers, and the indicator mechanism 200 is installed on the section of the overhead cable 100 near the tower area according to actual needs. The front sealing mechanism 300 uses the indicator mechanism 200 as a sliding platform for lateral extension and retraction, which facilitates the stability of the shielding mechanism 500's free extension. The rear sealing mechanism 400, in conjunction with the indicator mechanism 200 and in a static state, cleans the surface of the shielding mechanism 500 while also achieving real-time temperature control within the sealed cavity where the indicator mechanism 200 is located.

[0049] The indicator mechanism 200 includes a bottom housing 210 and a top housing 220 that are clamped to the outside of the overhead cable 100. The bottom housing 210 has a wiring hole 2101 at its bottom and an indicator light 2102 is fixedly installed at its bottom. The top housing 220 has three rectangular pre-installed holes and a photovoltaic module 230 is fixedly installed in each rectangular pre-installed hole.

[0050] Preferably, the bottom housing 210 is equipped with a signal acquisition unit, a core processing unit, a fault indication unit, and a communication transmission unit, all of which are powered by independent energy storage modules. The three evenly distributed photovoltaic modules 230 convert light energy into electrical energy, which can charge and replenish the energy storage modules in real time. The vertically downward indicator light 2102 can flash or provide a constant alarm directly below the overhead cable 100 when the power is on.

[0051] The front-end sealing mechanism 300 includes two first positioning shells 350 fixedly installed at the front end of the bottom shell 210 and the top shell 220 by multiple bolts. The outer wall of the first positioning shell 350 is provided with evenly distributed corrugated grooves. After closing, the two first positioning shells 350 are engaged with the outside of the first hexagonal end 320. The inner wall of the first hexagonal end 320 is provided with multiple evenly distributed arc-shaped protrusions. The two first positioning shells 350 are provided with a first protective tube 310.

[0052] Two symmetrically distributed first shielding pads 330 are installed in the annular groove of the inner pipe section of the first hexagonal end 320. After closing, the two first shielding pads 330 are fixed by two first combination bolts 340. A first stud 3301 is provided on the outer side of the first shielding pad 330.

[0053] The flange at the outer end of the first protective tube 310 is fixedly installed on the stud on the outer side of the first hexagonal end 320 by a nut.

[0054] Preferably, the first protective tube 310 is movably installed in the semi-circular groove in the middle of the inner side of the bottom housing 210, which facilitates the enhancement of the overall stability of the outward lateral movement of the first hexagonal end 320, the two first shielding pads 330, and the shielding mechanism 500.

[0055] The surfaces of the two first shielding pads 330 and the inner walls of the two first combined bolts 340 are coated with shielding and insulating layers to enhance the shielding and protection of electromagnetic interference from the indicator mechanism 200 toward the tower.

[0056] Combination Figure 4 , Figure 10 as well as Figure 12 As shown, based on the above embodiment, the rear sealing mechanism 400 includes two second positioning shells 450 fixedly installed at the rear ends of the bottom shell 210 and the top shell 220 by multiple bolts. The second positioning shells 450 and the first positioning shell 350 have the same structure. After closing, the two second positioning shells 450 are snapped with second hexagonal ends 420. The second hexagonal ends 420 have the same structure as the first hexagonal ends 320. The two second positioning shells 450 are provided with second protective tubes 410.

[0057] Two symmetrically distributed second shielding pads 430 are installed in the annular groove of the inner pipe section of the second hexagonal end 420, and the two second shielding pads 430 are fixed by two second combination bolts 440. Limiting holes 4302 are opened in the second shielding pads 430. After closing, a light shield 4303 is fixedly installed on the inner side of the two second shielding pads 430.

[0058] Preferably, the second protective tube 410 is inserted into the interior of the two second positioning shells 450, which facilitates the enhancement of the overall stability and structural strength of the second hexagonal end 420 and the two second shielding pads 430 after assembly. The surfaces of the two second shielding pads 430 and the inner walls of the two second positioning shells 450 are coated with shielding and insulating layers.

[0059] The light shield 4303 has a U-shaped structure and is adapted to be inserted into the outside of the indicator light 2102. This facilitates the effective focusing effect on the flashing or constantly lit indicator light 2102, and improves the brightness of the light passing through the shielding mechanism 500 and shining outward, making it easier for maintenance personnel to observe quickly. The post at the rear end of the bottom housing 210 is adapted to be inserted into the two limiting holes 4302.

[0060] The flange at the outer end of the second protective tube 410 is fixedly installed on the stud on the outer side of the second hexagonal end 420 by a nut;

[0061] The top of the inner side of the second shielding pad 430 is provided with a U-shaped groove, and an exhaust hood 460 is fixedly installed in the U-shaped groove. An inclined first filter screen 4601 is fixedly installed inside the exhaust hood 460.

[0062] Two symmetrically distributed second studs 4301 are provided on the top and bottom of the outer side of the second shielding pad 430. A top pad 470 is installed on one of the second studs 4301, and a bottom pad 480 is installed on the other second stud 4301. Two guide rods 4701 are fixedly installed inside the top pad 470. An outer frame 4702 is movably installed on the outer end of the guide rod 4701, and a top brush 4703 is fixedly installed on the other end of the outer frame 4702.

[0063] Two crossbars 4801 are fixedly installed inside the bottom pad 480, and bottom brushes 4802 are fixedly installed on the outer ends of the two crossbars 4801.

[0064] The bottom pad 480 and the top pad 470 have the same structure.

[0065] Preferably, the guide rod 4701 has a T-shaped structure, and the outer frame 4702 has a groove on the rod section facing the top pad 470. A shaft is inserted into the groove, and the shaft is movably installed in the through hole at the outer end of the guide rod 4701. The guide rod 4701, the outer frame 4702 and the crossbar 4801 are all made of insulating material.

[0066] The top brush 4703 and the bottom brush 4802 both have an arc-shaped structure. The top brush 4703 is composed of a semi-circular outer shell and a brush blade, while the bottom brush 4802 is composed of an arc-shaped outer shell and a brush blade.

[0067] Specifically, after the shielding mechanism 500 detaches from the two second shielding pads 430, the top brush 4703 and the bottom brush 4802 can perform adaptive cleaning on the two light-transmitting parts reserved inside the shielding mechanism 500.

[0068] Combination Figures 5 to 10As shown, in the above embodiment, the shielding mechanism 500 includes a shielding outer cylinder 510 fixedly installed outside the first stud 3301 by a nut, and the shielding outer cylinder 510 is inserted into the outside of the two first shielding pads 330 and the two second shielding pads 430. A top glass plate 520 is fixedly installed in the slot at the top of the shielding outer cylinder 510, and a bottom glass plate 530 is fixedly installed in the slot at the bottom of the shielding outer cylinder 510.

[0069] The outer surface of the top glass plate 520 is adapted to be attached to the brush plate inside the top brush 4703, and the outer surface of the bottom glass plate 530 is adapted to be attached to the brush plate inside the bottom brush 4802.

[0070] A third stud 5101 and a base 5102 are fixedly installed on the outer wall of the shielding outer cylinder 510 near the rear sealing mechanism 400. A rod 5103 is inserted into the base 5102. A pressure block 5104 is movably installed on the outside of the rod 5103. An elliptical groove is opened in the middle of the pressure block 5104. The pressure block 5104 is fixed to the third stud 5101 by a nut, which facilitates the straightening and pressing of the two sets of guide rods 4701 and the outer frame 4702.

[0071] Preferably, the surface of the shielding outer cylinder 510 is coated with a shielding layer and an insulating layer, and the inner wall of the shielding outer cylinder 510 facing the port of the first shielding pad 330 is provided with a raised ring pad, and the two first studs 3301 are fixedly installed in the two holes in the raised ring pad by two nuts.

[0072] Specifically, when the shielding outer cylinder 510, together with the two first shielding pads 330, moves laterally outward from the indicator mechanism 200 until the indicator mechanism 200 is exposed, the top brush 4703 and the bottom brush 4802 can adapt to scrape dirt from the outer surfaces of the top glass plate 520 and the bottom glass plate 530, which facilitates adaptive cleaning of the top glass plate 520 and the bottom glass plate 530, ensuring that the top glass plate 520 and the bottom glass plate 530 maintain high light transmittance at all times;

[0073] When the top housing 220 needs to be flipped open, the nut on the third stud 5101 is removed, and the pressure block 5104 is flipped outward with the insertion rod 5103 as the axis using an insulating rod. This allows the outer frame 4702 and the top brush 4703 to be flipped to the rear sealing mechanism 400, ensuring that the indicator mechanism 200 is unobstructed in the open state, which is convenient for electricians to maintain and repair.

[0074] An air intake hood 540 is fixedly installed inside the pipe section at the bottom of the shielding outer cylinder 510. A filter element 5401 is installed inside the air intake hood 540. A waterproof cover 550 is installed at the bottom of the air intake hood 540. Two second filter screens 5501 are symmetrically distributed in two holes on the outer wall of the waterproof cover 550. A desiccant filter element 5502 is inserted inside the waterproof cover 550.

[0075] A control module 560 is fixedly installed at the bottom of the inner cavity of the shielding outer cylinder 510. A motor 5601 is fixedly installed inside the control module 560. A fan blade 5602 is installed on the motor 5601, and the rotor rod segment inside the motor 5601 is adapted to be inserted into the hole in the middle of the filter element 5401.

[0076] Preferably, the extended wire at the rear end of the control module 560 passes through the wiring hole 2101, and the end of the extended wire is connected to the energy storage module inside the bottom housing 210, and the start and stop of the motor 5601 are controlled in real time via the power distribution network control terminal through wireless communication.

[0077] When the motor 5601 runs and drives the fan blades 5602 to rotate at high speed, ambient air is drawn into the inner cavity of the waterproof cover 550. The airflow filtered by the second filter 5501 and the dehumidifying filter element 5502 can control the temperature and dissipate heat of the indicator mechanism 200 in the sealed cavity in real time.

[0078] The working principle and usage process of the present invention: When erecting the overhead cable 100, the indicator mechanism 200 of the sleeve structure and the shielding mechanism 500 are assembled on the line segment of the overhead cable 100 close to the tower, until the front end sealing mechanism 300 faces the tower and the rear end sealing mechanism 400 is away from the tower.

[0079] When in use, the indicator mechanism 200, which is sealed by the front sealing mechanism 300, the rear sealing mechanism 400 and the shielding mechanism 500, can operate safely in the sealed cavity. The external shielding reduces the impact of factors such as the electromagnetic environment of the urban power distribution network, high temperature, high humidity and heavy rainfall on the operation of the indicator mechanism 200. In the independent shielding environment, the accuracy of power monitoring by the indicator mechanism 200 can be further improved.

[0080] Meanwhile, the indicator light 2102 located at the bottom of the bottom housing 210 is protected by the light shield 4303. The light generated by the flashing or constant illumination of the indicator light 2102 can be effectively focused and shine through the bottom glass plate 530 onto the area directly below the overhead cable 100, making it convenient for electricians to observe in real time on the ground or around the tower.

[0081] When the power distribution network is installed in a harsh environment, in order to ensure the safe operation of the sealed and shielded indicator mechanism 200 under high load conditions, the electricity converted by the photovoltaic module 230 powers the internal signal acquisition unit, core processing unit, fault indication unit, and communication transmission unit of the indicator mechanism 200. Simultaneously, the extended wire at the end of the control module 560 is connected to the energy storage module inside the bottom casing 210 through the wiring hole 2101. Therefore, it can also power the control module 560 and the motor 5601, and both are controlled through the power distribution network control terminal. When the motor 5601 is started through the power distribution network control terminal... The fan blades 5602, driven and rotating at high speed, actively draw air from the harsh environment into the inner cavity of the waterproof cover 550. The air is pre-filtered by the second filter 5501, and the air after being dehumidified by the dehumidifying filter element 5502 enters the sealed cavity through the air intake cover 540. Finally, the temperature-controlled airflow blown in a specific direction can flow continuously along the outer surface of the indicator mechanism 200. Finally, the hot air in the sealed cavity can be continuously released to the outside through the exhaust cover 460 and the first filter 4601, which helps to ensure the efficient operation of the indicator mechanism 200 in the sealed cavity and reduces the disadvantage of urban electromagnetic interference to the indicator mechanism 200.

[0082] To facilitate the electrician's inspection or maintenance of each unit within the indicator mechanism 200, the electrician can use an insulating hook to pull the first hexagonal end 320 and the first protective tube 310 outward from the two first combination bolts 340. The first hexagonal end 320, which is snapped onto the outside of the two first positioning shells 350, will be pulled and will be in a non-contact state with the overhead cable 100. The first protective tube 310 is located in the middle hole inside the bottom shell 210, which helps to enhance the centering stability of the outward lateral movement front sealing mechanism 300 and the shielding mechanism 500.

[0083] As the shielding outer cylinder 510, top glass plate 520 and bottom glass plate 530 move laterally outward from the outside of the indicator mechanism 200, the two horizontally placed crossbars 4801 provide support for the bottom brush 4802 while ensuring that the bottom brush 4802 cleans the outer surface of the bottom glass plate 530. Similarly, the two sets of guide rods 4701 and the outer frame 4702, which are pressed by the pressure block 5104, can ensure that the top brush 4703 effectively cleans the outer surface of the top glass plate 520, so as to realize the adaptive cleaning treatment of the light-transmitting area reserved by the outer shield of the device.

[0084] Until the indicator mechanism 200 is in an exposed state, an electrician can use a special tool to open the closed ports of the bottom housing 210 and the top housing 220 until the openings of the bottom housing 210 and the top housing 220 are... Figure 8 The exposed and open indicator mechanism 200 allows electricians to easily inspect or maintain its internal units.

[0085] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0086] The foregoing has provided a detailed description of the indicator for fault location in power distribution networks provided by this invention. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. An indicator for fault location in a power distribution network, comprising an overhead cable (100), characterized in that, It also includes an indicator mechanism (200) installed on the overhead cable (100) near the tower line segment, a front end blocking mechanism (300) installed at the front end of the indicator mechanism (200), a rear end blocking mechanism (400) installed at the rear end of the indicator mechanism (200), and a shielding mechanism (500) disposed outside the front end blocking mechanism (300) and the rear end blocking mechanism (400). The shielding mechanism (500) includes a shielding outer cylinder (510) fixedly installed outside the first stud (3301) by a nut, and the shielding outer cylinder (510) is inserted into the outside of the two first shielding pads (330) and the two second shielding pads (430). A top glass plate (520) is fixedly installed in the slot at the top of the shielding outer cylinder (510), and a bottom glass plate (530) is fixedly installed in the slot at the bottom of the shielding outer cylinder (510). The outer surface of the top glass plate (520) is adapted to be attached to the brush plate inside the top brush (4703), and the outer surface of the bottom glass plate (530) is adapted to be attached to the brush plate inside the bottom brush (4802).

2. The indicator for fault location in a power distribution network according to claim 1, characterized in that, The outer wall of the shielding cylinder (510) near the rear sealing mechanism (400) is fixedly installed with a third stud (5101) and a base (5102). A rod (5103) is inserted into the base (5102). A pressure block (5104) is movably installed on the outside of the rod (5103). An elliptical groove is opened in the middle of the pressure block (5104). The pressure block (5104) is fixed on the third stud (5101) by a nut so as to straighten and press the two sets of guide rods (4701) and the outer frame (4702).

3. The indicator for fault location in a power distribution network according to claim 2, characterized in that, An air intake hood (540) is fixedly installed inside the pipe section at the bottom of the shielding outer cylinder (510). A filter element (5401) is installed inside the air intake hood (540). A waterproof cover (550) is installed at the bottom end of the air intake hood (540). Two second filter screens (5501) are symmetrically distributed in two holes on the outer wall of the waterproof cover (550). A desiccant filter element (5502) is inserted inside the waterproof cover (550). A control module (560) is fixedly installed at the bottom of the inner cavity of the shielding outer cylinder (510). A motor (5601) is fixedly installed inside the control module (560). A fan blade (5602) is installed on the motor (5601), and the rotor rod segment inside the motor (5601) is adapted to be inserted into the hole in the middle of the filter element (5401).

4. The indicator for fault location in a power distribution network according to claim 1, characterized in that, The indicator mechanism (200) includes a bottom housing (210) and a top housing (220) clamped outside the overhead cable (100). The bottom housing (210) has a wiring hole (2101) at its bottom and an indicator light (2102) is fixedly installed at its bottom. The top housing (220) has three rectangular pre-installed holes and a photovoltaic module (230) is fixedly installed in the rectangular pre-installed holes.

5. The indicator for fault location in a power distribution network according to claim 4, characterized in that, The front-end sealing mechanism (300) includes two first positioning shells (350) fixedly installed at the front end of the bottom shell (210) and the top shell (220) by multiple bolts. The outer wall of the first positioning shell (350) is provided with evenly distributed corrugated slots. After closing, the two first positioning shells (350) are engaged with the outside of the first hexagonal end (320). The inner wall of the first hexagonal end (320) is provided with multiple evenly distributed arc-shaped protrusions. The two first positioning shells (350) are provided with a first protective tube (310). Two first shielding pads (330) are symmetrically distributed in the annular groove of the inner pipe section of the first hexagonal end (320), and after closing, the two first shielding pads (330) are fixed by two first combination bolts (340), and a first stud (3301) is provided on the outside of the first shielding pad (330). The flange at the outer end of the first protective tube (310) is fixedly installed on the stud on the outer side of the first hexagonal end (320) by a nut.

6. The indicator for fault location in a power distribution network according to claim 5, characterized in that, The rear sealing mechanism (400) includes two second positioning shells (450) fixedly installed at the rear ends of the bottom shell (210) and the top shell (220) by multiple bolts. The second positioning shells (450) and the first positioning shells (350) have the same structure. After closing, the two second positioning shells (450) are snapped with second hexagonal ends (420). The second hexagonal ends (420) have the same structure as the first hexagonal ends (320). The two second positioning shells (450) are provided with second protective tubes (410). Two symmetrically distributed second shielding pads (430) are installed in the annular groove of the inner pipe section of the second hexagonal end (420), and the two second shielding pads (430) are fixed by two second combination bolts (440). Limiting holes (4302) are opened in the second shielding pads (430). After closing, a light shield (4303) is fixedly installed on the inner side of the two second shielding pads (430). The flange at the outer end of the second protective tube (410) is fixedly installed on the stud on the outside of the second hexagonal end (420) by a nut.

7. The indicator for fault location in a power distribution network according to claim 6, characterized in that, The top of the inner side of the second shielding pad (430) is provided with a U-shaped groove, and an exhaust hood (460) is fixedly installed in the U-shaped groove. An inclined first filter screen (4601) is fixedly installed inside the exhaust hood (460).

8. The indicator for fault location in a power distribution network according to claim 6, characterized in that, The top and bottom of the outer side of the second shielding pad (430) are provided with two symmetrically distributed second studs (4301), and a top pad (470) is installed on one of the second studs (4301). Two guide rods (4701) are fixedly installed inside the top pad (470). An outer frame (4702) is movably installed on the outer end of the guide rod (4701), and a top brush (4703) is fixedly installed on the other end of the outer frame (4702).

9. The indicator for fault location in a power distribution network according to claim 8, characterized in that, The rear sealing mechanism (400) also includes a bottom pad (480) mounted on another second stud (4301). Two crossbars (4801) are fixedly installed inside the bottom pad (480), and bottom brushes (4802) are fixedly installed at the outer ends of the two crossbars (4801). The bottom pad (480) and the top pad (470) have the same structure.

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