Split wall-mounted intelligent grounding box

Abstract

The utility model discloses a split wall-mounted intelligent grounding box, and aims to provide a split wall-mounted intelligent grounding box which is high in operation safety and convenient to operate and maintain. The device comprises a first box body and a second box body, a signal cable is connected between the first box body and the second box body, the first box body is internally provided with a primary high-voltage grounding system, the second box body is internally provided with a secondary intelligent monitoring system, the first box body is provided with a cable through hole, and the second box body is provided with a secondary intelligent monitoring system. A grounding cable is connected in the cable through hole, and the grounding cable is connected with the primary high-voltage grounding system. The grounding box is applied to the technical field of grounding boxes.

Description

Technical Field

[0001] This utility model relates to a grounding box, and more particularly to a split-type wall-mounted intelligent grounding box. Background Technology

[0002] High-voltage cables with voltage levels of 110kV and above mainly use single-core cables with metallic sheaths. During normal operation, the magnetic lines of force generated by the alternating current in the metallic sheath and the cable core become cross-linked, resulting in a high induced voltage at both ends. Therefore, appropriate grounding measures are required to limit the induced voltage within a safe voltage range. Grounding boxes are primary devices for handling the grounding of the cable's metallic sheath, including various types such as direct grounding boxes, protective grounding boxes, and cross-connected grounding boxes. Based on traditional grounding boxes, intelligent grounding boxes, by deploying online monitoring units and intelligent sensors, add a secondary intelligent monitoring system. This system can sense operational information such as the composite current of the high-voltage cable, the grounding current of the metallic sheath, the induced voltage of the metallic sheath, and the temperature of the cable joints. This provides effective reference for diagnosing and assessing the health status of the cable body, cable accessories, and grounding boxes, and provides a basis for the safe operation and intelligent maintenance of cable lines. The primary high-voltage grounding system of the intelligent grounding box includes cable metal sheath grounding wire, return cable, copper busbar, overvoltage protector, primary current transformer, etc.; the secondary intelligent monitoring system includes online monitoring unit, intelligent sensor, photovoltaic power generation module, battery and battery charging and discharging management module, communication module, etc. Compared with the primary high-voltage grounding system, the secondary intelligent monitoring system requires more on-site debugging and daily operation and maintenance. Therefore, the operation and maintenance of the intelligent grounding box requires opening the box door for daily operation and maintenance.

[0003] Wall-mounted intelligent grounding boxes are primarily installed in cable terminal towers and cable tunnels. Existing products typically combine the primary high-voltage grounding system and the secondary intelligent monitoring system within a single enclosure. This design has significant drawbacks. Firstly, since the cable's metallic sheath is an integral part of the high-voltage power cable, during a power cable fault, the cable's metallic sheath, grounding copper busbar, and overvoltage protection components in the primary high-voltage grounding system all experience high voltage or high current. If personnel are not adequately protected and accidentally touch the primary high-voltage grounding system, it can easily lead to electric shock, and in severe cases, personal injury. Secondly, when wall-mounted grounding boxes are installed on cable terminal towers, their high installation position and integrated design necessitate a power outage request and climbing the tower to open the enclosure for maintenance. Power outages compromise power supply reliability and pose significant safety risks. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a split wall-mounted intelligent grounding box with high operational safety and easy operation and maintenance.

[0005] The technical solution adopted by this utility model is as follows: This utility model includes a first box and a second box, and a signal cable is connected between the first box and the second box. A primary high-voltage grounding system is provided in the first box, and a secondary intelligent monitoring system is provided in the second box. A cable through hole is opened on the first box, and a grounding cable is connected in the cable through hole. The grounding cable is connected to the primary high-voltage grounding system.

[0006] Furthermore, the grounding cable includes an N-phase grounding wire and three phase cables, namely an A-phase grounding cable, a B-phase grounding cable, and a C-phase grounding cable. The N-phase grounding wire is connected to the first enclosure through the side end of the first enclosure, and the three phase cables are all connected to the first enclosure through the bottom of the first enclosure.

[0007] Furthermore, the primary high-voltage grounding system includes an insulating plate, on which cable clamp assemblies and grounding copper busbar assemblies are provided in the same number as the phase cables. The cable clamp assembly includes a movable external clamp, a current transformer, and a fixed internal clamp arranged sequentially along the length of the phase cable. The grounding copper busbar assembly includes a cross-connecting copper busbar, an overvoltage protector copper busbar, and a grounding copper busbar. One end of the overvoltage protector copper busbar is connected to the fixed internal clamp, and the other end is provided with an overvoltage protector. The overvoltage protector is connected to the grounding copper busbar, and a voltage sensor is provided on the overvoltage protector copper busbar. One end of the cross-connecting copper busbar is connected to the fixed internal clamp, and the other end is provided on the corresponding movable external clamp.

[0008] Furthermore, the primary high-voltage grounding system also includes an N-phase grounding wire connector. The N-phase grounding wire is connected to the side of the first housing through the N-phase grounding wire connector. The N-phase grounding wire connector includes an insulating body, in which a sleeve conductive rod is fitted. One end of the sleeve conductive rod has a first connection hole, and the other end has a second connection hole. The first connection hole and the second connection hole are respectively connected to the N-phase grounding wire and the grounding copper busbar. The insulating body has a large-diameter end and a small-diameter end. The small-diameter end is connected to the cable through hole located at the side of the first housing and is connected to the grounding copper busbar. The large-diameter end is connected to the N-phase grounding wire.

[0009] Furthermore, a sealing ring is fitted onto the small-diameter end, and the sealing ring abuts against the large-diameter end. An annular protrusion is provided on the conductive rod of the sleeve, and the annular protrusion cooperates with the insulating body.

[0010] Furthermore, the insulating plate is connected to the first housing by fixing bolts, and a safe distance is provided between the insulating plate and the first housing.

[0011] Furthermore, the movable outer clamp includes an upper outer clamp and a lower outer clamp, and a locking bolt is connected between the upper outer clamp and the lower outer clamp.

[0012] Furthermore, the overvoltage protector copper busbar has a U-shaped opening, and the overvoltage protector copper busbar is connected to the fixed inner clamp through the U-shaped opening. A fastening bolt is connected to the U-shaped opening.

[0013] Furthermore, the secondary intelligent monitoring system includes an online monitoring host, a storage battery, a power management module, and multiple intelligent sensors. The power management module is connected to a solar panel. The online monitoring host and the storage battery are both connected to the power management module. The intelligent sensors and the communication module are both connected to the online monitoring host.

[0014] Furthermore, the first housing is provided with a first housing cover, and a waterproof rubber gasket is provided between the first housing and the first housing cover, and the waterproof rubber gasket is provided with a waterproof groove; the second housing is provided with an antenna interface, and a mushroom-shaped antenna is connected to the antenna interface; the two ends of the signal cable are connected to the first housing and the second housing via aviation plugs.

[0015] The beneficial effects of this utility model are:

[0016] In contrast to the shortcomings of existing technologies, this invention utilizes a separate first and second enclosure design. The primary high-voltage grounding system and the secondary intelligent monitoring system are respectively installed in the first and second enclosures, and the secondary analog signals from the first enclosure are connected to the second enclosure for monitoring via signal cables. Therefore, this separate design allows the first enclosure to be installed near the cable termination, while the second enclosure can be installed in a lower, easily accessible location for maintenance personnel. Maintenance of the secondary intelligent monitoring system located in the second enclosure does not involve the primary high-voltage grounding system in the first enclosure, eliminating the need for power outages and avoiding the safety hazards of accidental contact with the high-voltage components of the primary high-voltage grounding system. Furthermore, the installation is more flexible and convenient, giving this invention the advantages of high operational safety and ease of maintenance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the planar structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the planar structure of the first box body of this utility model. Figure 1 ;

[0020] Figure 3 This is a schematic diagram of the planar structure of the first box body of this utility model. Figure 2 ;

[0021] Figure 4 This is a three-dimensional structural diagram of the primary high-voltage grounding system of this utility model;

[0022] Figure 5 yes Figure 2 A magnified view of part A;

[0023] Figure 6 This is a cross-sectional schematic diagram of the N-phase grounding wire connector of this utility model;

[0024] Figure 7 This is a schematic diagram of the connection relationship of the secondary intelligent monitoring system of this utility model.

[0025] The attached figures are labeled as follows:

[0026] 1. First enclosure; 2. Second enclosure; 3. Signal cable; 4. Insulation board; 5. Primary high-voltage grounding system; 6. Secondary intelligent monitoring system; 7. Grounding cable; 8. N-phase grounding wire; 9. Phase cable; 10. Movable external clamp; 11. Fixed internal clamp; 12. Cross-connecting copper busbar; 13. Overvoltage protector copper busbar; 14. Current transformer; 15. Grounding copper busbar; 16. Overvoltage protector; 17. N-phase grounding wire connector; 18. Insulating body; 19. Bushing conductive rod; 20. First connecting hole; 21. Second connecting hole; 22. Large diameter end; 23. Small diameter end; 24. Voltage sensor; 25. Sealing ring; 26. Annular protrusion; 27. U-shaped opening; 28. Online monitoring host; 29. ​​Battery; 30. Power management module; 31. Intelligent sensor; 32. Communication module; 34. Aviation plug.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] 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 scope of protection of the present utility model.

[0029] It should be noted that all directional indicators in this utility model embodiment, such as up, down, left, right, front, back, clockwise, counterclockwise, etc., are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0030] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0031] like Figures 1 to 3 As shown, in this embodiment, the present invention includes a first housing 1 and a second housing 2, with a signal cable 3 connecting the first housing 1 and the second housing 2. A primary high-voltage grounding system 5 is installed in the first housing 1, and a secondary intelligent monitoring system 6 is installed in the second housing 2. A cable perforation is provided on the first housing 1, through which a grounding cable 7 is connected, and the grounding cable 7 is connected to the primary high-voltage grounding system 5. The first housing 1 is welded from 304 stainless steel sheet, and the welds are polished, resulting in a housing without sharp burrs or protrusions, thus reducing the level of partial discharge.

[0032] In contrast to the shortcomings of existing technologies, this invention utilizes a separate design with a first enclosure 1 and a second enclosure 2. The primary high-voltage grounding system 5 and the secondary intelligent monitoring system 6 are respectively installed in the first enclosure 1 and the second enclosure 2. The secondary analog signals from the first enclosure 1 are connected to the second enclosure 2 for monitoring via a signal cable 3. Therefore, with this separate design, the first enclosure 1 can be installed near the cable terminal, and the second enclosure 2 can be installed in a lower, easily accessible location for maintenance personnel. Maintenance of the secondary intelligent monitoring system 6 located in the second enclosure 2 does not involve the primary high-voltage grounding system 5 located in the first enclosure 1, eliminating the need for power outages and avoiding the safety hazards caused by accidental contact with the high-voltage portion of the primary high-voltage grounding system 5. Furthermore, the installation is more flexible and convenient, giving this invention the advantages of high operational safety and ease of maintenance.

[0033] In some embodiments, the grounding cable 7 includes an N-phase grounding wire 8 and three phase cables 9, which are respectively an A-phase grounding cable, a B-phase grounding cable, and a C-phase grounding cable. The N-phase grounding wire 8 is connected to the first housing 1 through the side end of the first housing 1, and the three phase cables 9 are all connected to the first housing 1 through the bottom of the first housing 1. Specifically, there are four cable perforations, three of which are located at the bottom of the first housing 1 and are used sequentially for the A-phase grounding cable, B-phase grounding cable, and C-phase grounding cable to connect to the first housing 1. After the grounding cables 7 are connected, they are sealed with cable sealant to maintain the sealing performance of the housing and prevent moisture and water immersion. The other cable perforation is located at the side end of the first housing 1 and is used to connect the N-phase grounding wire 8. Specifically, by connecting the N-phase grounding wire 8 to the first enclosure 1 through the side end of the first enclosure 1 and connecting the three phase cables 9 to the first enclosure 1 through the bottom of the first enclosure 1, the space inside the first enclosure 1 can be maximized while ensuring the electrical insulation performance of the primary high-voltage grounding system 5, thereby reducing the size of the enclosure and lowering costs.

[0034] like Figures 4 to 5As shown, in some embodiments, the primary high-voltage grounding system 5 includes an insulating plate 4. The insulating plate 4 is provided with cable clamp assemblies and grounding copper busbar assemblies in the same number as the phase cables 9. The cable clamp assembly includes a movable outer clamp 10, a current transformer 14, and a fixed inner clamp 11 arranged sequentially along the length of the phase cable 9. The grounding copper busbar assembly includes a cross-connecting copper busbar 12, an overvoltage protector copper busbar 13, and a grounding copper busbar 15. One end of the overvoltage protector copper busbar 13 is connected to the fixed inner clamp 11, and the other end is provided with an overvoltage protector 16. The overvoltage protector 16 is connected to the grounding copper busbar 15. A voltage sensor 24 is provided on the overvoltage protector copper busbar 13. One end of the cross-connecting copper busbar 12 is connected to the fixed inner clamp 11, and the other end is provided on the corresponding movable outer clamp 10. The inner clamp 11 is made of copper and fixed to the insulating plate 4. Its clamp openings are used to fix the inner cores of the A-phase, B-phase, and C-phase grounding cables. A locking bolt is installed above the inner clamp 11, perpendicular to the inner core of the grounding cable 7, to fix and tighten the cable core. Furthermore, the voltage sensor 24 is encapsulated in epoxy resin and fixed to the copper busbar 13 of the overvoltage protector. Internally, it uses the capacitive voltage division principle to collect the induced voltage of the cable sheath. Since the current transformer 14 is encapsulated in epoxy resin and is relatively thick, it does not directly contact the cable core and therefore does not have electrical insulation issues. Thus, the current transformer 14 is mounted on another insulating plate. By adjusting the distance between this insulating plate and the bottom of the first housing 1, the center of the aperture of the current transformer 14 and the center of the clamp aperture can be aligned on the same center line. The secondary cables of the voltage sensor 24 and the current transformer 14 are connected to the secondary intelligent monitoring system 6 through cable trays.

[0035] It should be noted that after the three-phase grounding cable 7 (phase A, phase B, and phase C) is connected to the first enclosure 1 through the cable perforation located at the bottom of the first enclosure 1, the outer armor layer of the cable is first stripped, the remaining cable outer core is passed through the movable outer clamp 10 and fixed, then passed through the current transformer 14, and then the cable insulation shielding layer is stripped, and the cable inner core is passed through the fixed inner clamp 11 and fixed. The center of the aperture of the movable outer clamp 10, the center of the aperture of the current transformer 14, and the center of the aperture of the fixed inner clamp 11 are kept on the same center line to facilitate the wiring of the grounding cable 7 and ensure the accuracy of grounding current measurement.

[0036] It should also be noted that the three cross-connecting copper busbars 12 connect the fixed inner clamp 11 to the corresponding movable outer clamp 10 in the order of A-phase-B-phase, B-phase-C-phase, and C-phase-A-phase, forming a cross-connecting wiring configuration. In addition, the overvoltage protector copper busbar 13 is located between the overvoltage protector 16 and the fixed inner clamp 11. The overvoltage protector copper busbar 13 and the overvoltage protector 16 are connected and fixed by fixing bolts, and the other end is in contact with the fixed inner clamp 11.

[0037] like Figure 6 As shown, in some embodiments, the primary high-voltage grounding system 5 further includes an N-phase grounding wire connector 17. The N-phase grounding wire 8 is connected to the side of the first housing 1 through the N-phase grounding wire connector 17. The N-phase grounding wire connector 17 includes an insulating body 18, in which a sleeve conductive rod 19 is fitted. One end of the sleeve conductive rod 19 has a first connecting hole 20, and the other end has a second connecting hole 21. The first connecting hole 20 and the second connecting hole 21 are respectively connected to the N-phase grounding wire 8. The ground wire 8 is connected to the grounding copper busbar 15. The insulating body 18 has a large-diameter end 22 and a small-diameter end 23. The small-diameter end 23 is connected to the cable through hole located at the side end of the first housing 1 and is connected to the grounding copper busbar 15. The large-diameter end 22 is connected to the N-phase grounding wire 8. A sealing ring 25 is sleeved on the small-diameter end 23, and the sealing ring 25 abuts against the large-diameter end 22. An annular protrusion 26 is provided on the sleeve conductive rod 19, and the annular protrusion 26 cooperates with the insulating body 18. The grounding copper busbar 15 is connected and fixed to the overvoltage protectors 16 of the A-phase grounding cable, B-phase grounding cable and C-phase grounding cable by bolts. One end of the grounding copper busbar 15 is bent at 90 degrees and has a hole, which is connected to the N-phase grounding wire connector 17 by bolts.

[0038] Specifically, the insulating body 18 is mushroom-shaped and includes the insulating body 18, the bushing conductive rod 19, and the sealing ring 25. The insulating body 18 is made of epoxy resin and is used to encapsulate the bushing conductive rod 19, ensuring that the insulation performance between the metal part of the first housing 1 and the conductor meets the technical requirements. The insulating body 18 has a total length of 94mm, a large diameter end 22 with a diameter of 74mm, and a small diameter end 23 with a diameter of 40mm. The head of the large diameter end 22 has a rounded corner with a radius of 20mm. The bushing conductive rod 19 encapsulated inside the insulating body 18 connects the grounding copper busbar 15 to the N-phase grounding wire 8. It is made of brass, which can carry load current for a long time and has good thermal stability, while also being able to withstand instantaneous overheating during a short circuit. The bushing conductive rod 19 is 96mm long and 25mm in diameter. Both ends are provided with two sets of 3mm high annular protrusions 26 to form a bayonet structure, which can enhance the axial tensile force between the insulating body 18 and the bushing conductive rod 19. The bushing conductive rod 19 has a depth of 25mm at both ends, and is fitted with the first connection hole 20 and the second connection hole 21 of an M18 stud, facilitating the connection of the N-phase grounding wire 8 and the grounding copper busbar 15. The matching sealing ring 25 is 3mm thick, with an outer diameter of 70mm and an inner diameter of 42mm, preventing external moisture from entering the grounding box and ensuring its airtightness. During installation, the bushing conductive rod 19 passes through the sealing ring 25 and then through the cable through hole located on the side of the first housing 1, and is connected to the grounding copper busbar 15 by bolts. The fixing bolt passes through the grounding copper busbar 15 and connects to the bushing conductive rod 19. The fixing insert on the left side of the bushing conductive rod 19 is used to connect the inner core wire of the N-phase grounding wire 8.

[0039] In some embodiments, the insulating plate 4 is connected to the first housing 1 by fixing bolts, and a safety distance is provided between the insulating plate 4 and the first housing 1. The safety distance is at least 50mm. Specifically, the insulating plate 4 is fixed to the first housing 1 by a combination of fixing bolts, and the safety distance between the insulating plate 4 and the first housing 1 conforms to the electrical insulation safety distance, ensuring that the primary high-voltage grounding system 5, which is directly connected to the grounding cable 7, maintains electrical insulation between itself and the first housing 1.

[0040] In some embodiments, the movable outer clamp 10 includes an upper outer clamp and a lower outer clamp, and a locking bolt connects the upper outer clamp and the lower outer clamp. Specifically, by adjusting the stroke of the locking bolt, the diameter of the through hole of the movable outer clamp 10 can be adjusted to allow the grounding cable 7 to pass through.

[0041] In some embodiments, the overvoltage protector copper busbar 13 has a U-shaped opening 27, and the overvoltage protector copper busbar 13 is connected to the fixed inner clamp 11 through the U-shaped opening 27. A fastening bolt is connected to the U-shaped opening 27. Specifically, due to the design of the U-shaped opening 27, simply loosening the fastening bolt and rotating the overvoltage protector copper busbar 13 is sufficient to disconnect the overvoltage protector 16 from the grounding cable 7; it is not necessary to directly remove both ends of the overvoltage protector copper busbar 13, so that the overvoltage protector 16 can be disconnected during high-voltage electrical insulation tests on the cable.

[0042] like Figure 7 As shown, in some embodiments, the secondary intelligent monitoring system 6 includes an online monitoring host 28, a battery 29, a power management module 30, and multiple intelligent sensors 31. The power management module 30 is connected to a solar panel. The online monitoring host 28 and the battery 29 are both connected to the power management module 30. The intelligent sensors 31 and the communication module 32 are both connected to the online monitoring host 28. The power management module 30 is used for power conversion, voltage stabilization, protection, and charging / discharging management of the battery 29. Its input is the voltage signal output from the solar panel, and its two outputs are the online monitoring host 28 and the battery 29, respectively. The online monitoring host 28 adopts an integrated edge-end design, possessing not only basic online monitoring functions for cable sheath circulation but also a cable joint temperature measurement interface and a cable terminal liquid level monitoring interface, allowing direct monitoring of the cable joint temperature and cable terminal liquid level.

[0043] It should be noted that, in terms of intelligence, the intelligent grounding box of this utility model is designed for both cable terminal towers and cable tunnels. The online monitoring host 28 not only has basic cable sheath circulation current monitoring and sheath induced voltage monitoring, but also has a cable joint temperature measurement interface and a cable terminal liquid level monitoring interface. Furthermore, the online monitoring host 28 adopts an integrated edge-end design, possessing edge computing capabilities. Through the RS485 interface, it can be connected to nearby intelligent monitoring terminals and intelligent sensors 31, such as partial discharge monitoring, temperature and humidity monitoring, water level monitoring, cable anti-theft and cutting monitoring, and gas concentration monitoring. This provides strong functional expandability, a significant cost advantage, and allows for advanced application analysis of multi-dimensional monitoring data, thus improving the product's intelligence level.

[0044] The split-type wall-mounted intelligent grounding box has been optimized in terms of size, power supply, and protection level for application scenarios such as outdoor terminals, cable tunnels, and manholes. By deploying intelligent sensors 31, it can comprehensively perceive the status data of high-voltage cable composite current (load current superimposed on sheath grounding current), metal sheath grounding current, metal sheath induced voltage, and cable joint temperature. It provides effective reference for diagnosing and evaluating the health status of the cable body, cable accessories, and grounding box, and provides a basis for the safe operation and intelligent maintenance of cable lines.

[0045] In some embodiments, the first housing 1 is provided with a first cover, and a waterproof rubber gasket is provided between the first housing 1 and the first cover, with a waterproof groove on the waterproof rubber gasket; the second housing 2 has an antenna interface, and a mushroom-shaped antenna is connected to the antenna interface; the two ends of the signal cable 3 are connected to the first housing 1 and the second housing 2 via an aviation plug 34. Specifically, pull rings are provided on the left and right side walls of the first housing 1 and the first cover to facilitate the handling and hoisting of the housing during on-site installation; the waterproof rubber gasket and waterproof groove are provided between the first housing 1 and the first cover, and the first housing 1 and the first cover are fixedly connected by evenly distributed bolts to ensure the waterproof, dustproof and sealing performance of the housing; in addition, the secondary cables of the current transformer 14 and the voltage sensor 24 located in the first housing 1 are led out to the second housing 2 via the aviation plug 34;

[0046] The second enclosure 2 is also welded from 304 stainless steel. Two openings are designed at the top of the enclosure to install mushroom-shaped antennas. The antennas are sealed to the enclosure with adhesive to prevent water leakage. The mushroom-shaped antennas are used for 4G and Bluetooth wireless communication. The coaxial RF cable of the antenna is directly introduced into the enclosure and connected to the online monitoring host 28. Two rows of openings are designed at the bottom of the enclosure; the number of openings can be increased or decreased according to project needs. Aviation connectors 34 are installed in the openings and connected to analog signal interfaces such as grounding current, grounding voltage, main cable and partial discharge signals, connector temperature sensor signals, and liquid level sensor signals, as well as the solar panel power interface. The grounding current and grounding voltage signals originate from the current transformer 14 and voltage sensor 24 of the first enclosure 1. The second enclosure 2 is connected to the first enclosure 1 via signal cable 3. The solar panel can be installed independently, and then the power output signal is connected to the second enclosure 2 to power the online monitoring host 28.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A split-type wall-mounted intelligent grounding box, characterized in that: It includes a first enclosure (1) and a second enclosure (2), with a signal cable (3) connecting the first enclosure (1) and the second enclosure (2). A primary high-voltage grounding system (5) is installed in the first enclosure (1), and a secondary intelligent monitoring system (6) is installed in the second enclosure (2). A cable through hole is opened on the first enclosure (1), and a grounding cable (7) is connected in the cable through hole. The grounding cable (7) is connected to the primary high-voltage grounding system (5).

2. The split-type wall-mounted intelligent grounding box according to claim 1, characterized in that: The grounding cable (7) includes an N-phase grounding wire (8) and three phase cables (9). The three phase cables (9) are A-phase grounding cable, B-phase grounding cable and C-phase grounding cable, respectively. The N-phase grounding wire (8) is connected to the first box (1) through the side end of the first box (1). The three phase cables (9) are all connected to the first box (1) through the bottom of the first box (1).

3. A split-type wall-mounted intelligent grounding box according to claim 2, characterized in that: The primary high-voltage grounding system (5) includes an insulating plate (4). The insulating plate (4) is provided with cable clamp assemblies and grounding copper busbar assemblies in the same number as the phase cables (9). The cable clamp assembly includes a movable outer clamp (10), a current transformer (14), and a fixed inner clamp (11) arranged sequentially along the length of the phase cables (9). The grounding copper busbar assembly includes a cross-connecting copper busbar (12), an overvoltage protector copper busbar (13), and a grounding copper busbar (15). One end of the overvoltage protector copper busbar (13) is connected to the fixed inner clamp (11), and the other end is provided with an overvoltage protector (16). The overvoltage protector (16) is connected to the grounding copper busbar (15). A voltage sensor (24) is provided on the overvoltage protector copper busbar (13). One end of the cross-connecting copper busbar (12) is connected to the fixed inner clamp (11), and the other end is provided on the corresponding movable outer clamp (10).

4. A split-type wall-mounted intelligent grounding box according to claim 3, characterized in that: The primary high-voltage grounding system (5) further includes an N-phase grounding wire connector (17). The N-phase grounding wire (8) is connected to the side of the first housing (1) through the N-phase grounding wire connector (17). The N-phase grounding wire connector (17) includes an insulating body (18). A sleeve conductive rod (19) is provided in the insulating body (18). One end of the sleeve conductive rod (19) has a first connection hole (20), and the other end has a second connection hole (21). The first connection hole (20) and the second connection hole (21) are respectively connected to the N-phase grounding wire (8) and the grounding copper busbar (15). The insulating body (18) has a large-diameter end (22) and a small-diameter end (23). The small-diameter end (23) is connected to the cable through hole located at the side of the first housing (1) and is connected to the grounding copper busbar (15). The large-diameter end (22) is connected to the N-phase grounding wire (8).

5. A split-type wall-mounted intelligent grounding box according to claim 4, characterized in that: A sealing ring (25) is fitted onto the small diameter end (23), and the sealing ring (25) abuts against the large diameter end (22). An annular protrusion (26) is provided on the sleeve conductive rod (19), and the annular protrusion (26) cooperates with the insulating body (18).

6. A split-type wall-mounted intelligent grounding box according to claim 3, characterized in that: The insulating plate (4) is connected to the first housing (1) by fixing bolts, and a safety distance is provided between the insulating plate (4) and the first housing (1).

7. A split-type wall-mounted intelligent grounding box according to claim 3, characterized in that: The movable outer clamp (10) includes an upper outer clamp and a lower outer clamp, and a locking bolt is connected between the upper outer clamp and the lower outer clamp.

8. A split-type wall-mounted intelligent grounding box according to claim 3, characterized in that: The overvoltage protector copper busbar (13) has a U-shaped opening (27), and the overvoltage protector copper busbar (13) is connected to the fixed inner clamp (11) through the U-shaped opening (27). A fastening bolt is connected to the U-shaped opening (27).

9. A split-type wall-mounted intelligent grounding box according to claim 1, characterized in that: The secondary intelligent monitoring system (6) includes an online monitoring host (28), a storage battery (29), a power management module (30), and multiple intelligent sensors (31). The power management module (30) is connected to a solar panel. The online monitoring host (28) and the storage battery (29) are both connected to the power management module (30). The intelligent sensors (31) and the communication module (32) are both connected to the online monitoring host (28).

10. A split-type wall-mounted intelligent grounding box according to claim 1, characterized in that: The first box (1) is provided with a first box cover, and a waterproof rubber pad is provided between the first box (1) and the first box cover. The waterproof rubber pad is provided with a waterproof groove. The second box (2) is provided with an antenna interface, and a mushroom-shaped antenna is connected to the antenna interface. The two ends of the signal cable (3) are connected to the first box (1) and the second box (2) through an aviation plug (34).

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