A power distribution network grounding protection device

Abstract

This invention relates to the field of power grid grounding equipment technology, and discloses a distribution network grounding protection device, including a base, a grounding rod inserted through the base, a conductor hole on the grounding rod communicating with a receiving cavity within the grounding rod; symmetrical mounting grooves communicating with the receiving cavity are provided on both sides of the grounding rod, and metal spring pieces are disposed in the mounting grooves; a locking screw is threaded onto the base; during operation, as the locking screw continuously screws into the base, it pushes the metal spring pieces to clamp and fix the grounding conductor, and simultaneously the locking screw enters the mounting groove to position the grounding rod; this invention can achieve positioning and installation of the grounding rod, ensuring its stability, while also facilitating removal and installation, improving the convenience of inspection and maintenance.

Description

Technical Field

[0001] This invention relates to the field of power grid grounding equipment technology, and in particular to a distribution network grounding protection device. Background Technology

[0002] In the operation of a power system, the distribution network, as a key power distribution network connecting the generation end and the user end, is directly related to the reliability of power supply and the safety of electricity use. Grounding protection devices, as a core component of the distribution network's safety protection system, primarily prevent electric shock accidents, suppress equipment overvoltage, and ensure the normal operation of electrical equipment by diverting fault current to the ground. They are an indispensable and crucial technical measure for the safe operation of the distribution network.

[0003] Currently, the grounding devices used in power distribution networks are mostly installed by directly burying the grounding rod in the soil or fixing it to a preset position by simple insertion. These traditional structures generally have design flaws: firstly, they lack a dedicated positioning and connection structure, and there is no reliable positioning constraint between the grounding rod and surrounding components. This makes the grounding device prone to positional displacement due to soil settlement, external disturbances, and other factors during long-term use, affecting grounding conductivity; secondly, due to the lack of a positioning structure, the grounding device needs to be pulled out entirely from the ground during regular maintenance or fault repair of the power distribution network. This is not only laborious but also prone to damaging the grounding rod itself, conductor connections, or the compacted structure of the surrounding soil due to the lack of a clear removal reference, thus increasing the difficulty of subsequent reinstallation, reducing maintenance efficiency, and failing to meet the actual needs of efficient operation and maintenance of power distribution networks.

[0004] Therefore, there is an urgent need for a power distribution network grounding protection device that can locate and install the grounding rod while facilitating its removal and placement. Summary of the Invention

[0005] The purpose of this invention is to provide a power distribution network grounding protection device that can not only position and install the grounding rod to ensure its stability, but also facilitate its removal and installation, thereby improving the convenience of inspection and maintenance.

[0006] The present invention adopts the following technical solution: A power distribution network grounding protection device includes a base, on which a grounding rod is inserted. The grounding rod has a conductor hole that communicates with a cavity within the grounding rod. Two symmetrical mounting grooves communicating with the cavity are formed on both sides of the grounding rod. Metal spring pieces are placed within the mounting grooves. A locking screw is threaded onto the base. During operation, as the locking screw is continuously screwed into the base, it pushes the metal spring pieces to clamp and fix the grounding conductor, while simultaneously the locking screw enters the mounting groove to position the grounding rod.

[0007] Preferably, the base includes a base plate, on which a protective sleeve is coaxially disposed, and a through hole is formed in the protective sleeve and the base plate for the grounding rod to pass through; the locking screw is disposed on the protective sleeve.

[0008] Preferably, the protective sleeve is threadedly connected to the base plate.

[0009] Preferably, the base plate is provided with a plurality of downwardly extending anchoring ribs along its circumference.

[0010] Preferably, the wire hole is formed on the top side of the grounding rod.

[0011] Preferably, a rubber sealing ring is provided at the wire hole.

[0012] Preferably, each of the protective sleeves has a threaded hole through its sidewall, and the locking screw is threaded into the threaded hole. The locking screw consists of a threaded sleeve at one end and a push rod at the rear. An adjusting sleeve is elastically and rotatably provided inside the threaded sleeve. The adjusting sleeve has an adjusting groove extending inward from its end along its axis. An adjusting rod is provided at the rear of the adjusting sleeve. An adjusting hole for the adjusting rod to pass through is provided at the bottom of the threaded sleeve. The adjusting hole and the adjusting rod are non-circular structures.

[0013] Preferably, the inner wall of the threaded sleeve is provided with limit blocks protruding radially on both sides, and the adjusting sleeve is provided with stops symmetrically, with the stops located outside the limit blocks in the initial state.

[0014] Preferably, the mounting groove is divided into upper and lower parts by a partition, and the bottom of the metal spring is provided with a clamping part. The end of the clamping part located inside the accommodating cavity is an arc-shaped clamping plate structure, and the end located outside the accommodating cavity extends into the partition space at the bottom of the mounting groove. The push rod corresponds to the space at the bottom of the mounting groove.

[0015] Preferably, a frustum-shaped flow guide is coaxially provided at the lower part of the protective sleeve, and after the protective sleeve is connected to the base plate, the protective sleeve and the base plate are in close contact.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a threaded locking screw on the base, which, together with the mounting groove structure on both sides of the grounding rod, allows the end of the locking screw to simultaneously enter the mounting groove to form a positioning constraint when it is screwed into the base. This not only positions the grounding rod but also pushes the metal spring piece into the accommodating cavity to complete the positioning and clamping of the grounding wire inserted into the accommodating cavity. It can simultaneously achieve the positioning and fixing of the grounding wire and the grounding rod. When it is necessary to remove the grounding rod for inspection and maintenance, it is only necessary to rotate the locking screw in the opposite direction to control its outward movement. The structure is simple and the operation is convenient.

[0017] In addition, by pre-burying the base underground and using the grounding rod to establish a connection with the earth, the base serves as a stable support foundation, increasing the contact area with the ground surface, which greatly ensures the stability of the grounding rod, reduces interference from adverse external factors, ensures the stability of the contact depth and conduction path between the grounding rod and the earth, avoids the attenuation of grounding performance due to offset, and provides a reliable guarantee for the safe operation of the power distribution network. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of this application; Figure 2 This is a cross-sectional view of the protective sleeve according to an embodiment of this application; Figure 3 This is a cross-sectional view of the grounding rod according to an embodiment of this application; Figure 4 This is a partial cross-sectional view of the locking screw according to an embodiment of this application. Detailed Implementation

[0019] The present invention will now be described clearly and completely with reference to the accompanying drawings and embodiments: like Figures 1 to 4 As shown, the power distribution network grounding protection device of the present invention includes a base 1, which is pre-buried underground during use to provide a stable support foundation for the grounding rod 2. The grounding rod 2 is inserted through the base 1, and a wire hole 3 is opened on the grounding rod 2. An end cap 4 with an increased diameter is provided at the top of the grounding rod 2. The wire hole 3 is preferably located on the side wall of the grounding rod 2 below the end cap 4. The end cap 4 can provide a certain degree of protection for the wire hole 3 to prevent external dirt or water from entering the accommodating cavity 6. In addition, a rubber sealing ring 5 is provided at the wire hole 3. The through hole of the rubber sealing ring 5 matches the diameter of the grounding wire to achieve a tight connection between the grounding wire and the rubber sealing ring 5. The setting of the rubber sealing ring 5 can seal the wire hole 3 and improve the dustproof and waterproof effect.

[0020] The wire hole 3 is connected to the accommodating cavity 6 inside the grounding rod 2; symmetrical mounting grooves 7 are provided on both sides of the grounding rod 2, which are connected to the accommodating cavity 6. Each mounting groove 7 is provided with a metal spring 8. One end of the metal spring 8 is fixedly connected to the top wall of the mounting groove 7, and the other end is freely located in the space below the mounting groove 7. Under the action of external force, the free end of the metal spring 8 can move towards the center of the accommodating cavity 6; a locking screw 9 is threaded on the base 1; during operation, as the locking screw 9 is continuously screwed into the base 1, it pushes the metal spring 8 to complete the clamping and fixing of the grounding wire. At the same time, the locking screw 9 enters the mounting groove 7 to complete the positioning of the grounding rod 2, ensuring the stability of the grounding wire and the grounding rod 2.

[0021] Furthermore, in this invention, the base 1 includes a base plate 1-1 with a circular cross-section. A protective sleeve 1-2 is coaxially disposed on the base plate 1-1. A through hole for the grounding rod 2 to pass through is formed on both the protective sleeve 1-2 and the base plate 1-1. A locking screw 9 is disposed on the protective sleeve 1-2. Preferably, the protective sleeve 1-2 is threadedly connected to the base plate 1-1, that is, the base plate 1-1 is provided with a threaded hole, and a connecting screw sleeve 1-3 is coaxially disposed at the bottom of the protective sleeve 1-2. The connection between the protective sleeve 1-2 and the base plate 1-1 is achieved by connecting the connecting screw sleeve 1-3 to the threaded hole. Furthermore, a frustum-shaped flow guide 1-4 is coaxially arranged at the lower part of the protective sleeve 1-2. After the protective sleeve 1-2 is connected to the base plate 1-1, the protective sleeve 1-2 and the base plate 1-1 are tightly abutted. The flow guide 1-4 can protect the connection gap between the protective sleeve 1-2 and the base plate 1-1, preventing the connection gap from being exposed to the outside environment and corroded by adverse environmental factors for a long time, which would lead to a lot of dust in the connection gap and make it difficult to separate the protective sleeve 1-2 from the base plate 1-1. In addition, multiple downward-extending anchor bars 10 are arranged along the circumference of the base plate 1-1. The anchor bars 10 are generally L-shaped, which is beneficial to the stability of the base plate 1-1 when it is fixed by concrete pouring.

[0022] Furthermore, the protective sleeve 1-2 has a threaded hole through its side wall, and the locking screw 9 is threaded into the threaded hole. In the initial state, the end of the locking screw 9 is located in the threaded hole to form a concealed structure, avoiding protrusion and preventing unauthorized rotation that could damage the entire structure and affect the position of the grounding rod 2. Preferably, the locking screw 9 consists of a threaded sleeve 9-1 at the end and a push rod 9-2 at the rear. The diameter of the push rod 9-2 is preferably smaller than the diameter of the threaded sleeve 9-1. The push rod 9-2 is used to move into the mounting groove 7 as the threaded sleeve 9-1 moves in the threaded hole to push the metal spring 8. A spring 9-3 is provided at the end away from the opening. An adjusting sleeve 9-4 is rotatably connected to the end of the spring 9-3 near the opening. The adjusting sleeve 9-4 extends inward from its end along its axis and has an adjusting groove. The adjusting groove is usually polygonal so that a tool can be inserted into it to rotate, thereby completing the movement of the locking screw 9. An adjusting rod 9-5 is provided at the rear of the adjusting sleeve 9-4. An adjusting hole 9-6 is provided at the bottom of the threaded sleeve 9-1 for the adjusting rod 9-5 to pass through. The adjusting hole 9-6 and the adjusting rod 9-5 are non-circular structures, preferably cuboid or prism structures, to prevent slippage when the adjusting rod 9-5 is inserted into the adjusting hole 9-6 and rotates. When it is necessary to control the displacement of the locking screw 9 within the threaded hole, an operating tool needs to be inserted into the adjusting groove, pressing against the adjusting sleeve 9-4 and moving it into the threaded sleeve 9-1. At this time, the spring 9-3 is compressed, and the adjusting rod 9-5 enters the adjusting hole 9-6. Then, rotating the operating tool will drive the threaded sleeve 9-1 to rotate, completing the displacement of the entire locking screw 9. This design provides a certain degree of protection, breaking with conventional adjustment methods and preventing unauthorized personnel from damaging the device. Adjustment can be made simply by inserting a tool into the adjusting groove, thus improving the safety of the device.

[0023] Furthermore, limit blocks 9-7 are symmetrically protruding radially on both sides of the inner wall of the threaded sleeve 9-1, and stop blocks 9-8 are symmetrically arranged on the adjusting sleeve 9-4. In the initial state, the stop blocks 9-8 are located outside the limit blocks 9-7. At this time, the adjusting sleeve 9-4 cannot be directly pressed to compress the spring 9-3. When the threaded sleeve 9-1 needs to be rotated, since the spring 9-3 and the adjusting sleeve 9-4 are rotatably connected, the adjusting sleeve 9-4 needs to be rotated first to make the stop blocks 9-8 and the limit blocks 9-7 misaligned. Then, the adjusting sleeve 9-4 can be pushed to move along the axial direction of the threaded sleeve 9-1, which further improves the protective performance of the locking screw 9.

[0024] Furthermore, in this invention, the mounting groove 7 is divided into upper and lower parts by a partition 11. A clamping part 12 is provided at the bottom of the metal spring piece 8. One end of the clamping part 12 inside the accommodating cavity 6 is an arc-shaped clamping plate structure to match the cylindrical structure of the grounding wire, improving the tightness of their contact. The other end of the clamping part 12 outside the accommodating cavity 6 is a cuboid or cylindrical structure, extending into the lower partition space of the mounting groove 7. The push rod 9-2 corresponds to the lower space of the mounting groove 7, so that as the threaded sleeve 9-1 moves, the push rod 9-2 moves, thereby pushing the clamping part 12 and the metal spring piece towards the center of the accommodating cavity 6. In addition, the partition 11 inside the mounting groove 7 divides the mounting groove 7 into upper and lower spaces, also providing a limiting space for the push rod 9-2, preventing the mounting groove 7 from being too high and causing the grounding rod 2 to have excess space to move upwards along the mounting groove 7 after installation, thus preventing unstable connection between the grounding rod 2 and the base 1.

[0025] When using this invention, the base plate 1-1 is first pre-embedded at the designated position as a stable support foundation for the grounding rod 2. Then, the protective sleeve 1-2 is installed, and the grounding rod 2 is passed through the protective sleeve 1-2 and the base plate 1-1 in sequence. After that, the grounding wire is inserted through the wire hole 3 and conveyed downward along the height direction of the accommodating cavity 6 to the metal spring 8. Finally, the locking screw 9 is adjusted to move towards the grounding rod 2, pushing the metal spring 8 towards the middle of the accommodating cavity 6 to complete the fixed clamping of the grounding wire. At the same time, as the push rod 9-2 in the locking screw 9 enters the mounting groove 7, the positioning of the grounding rod 2 is completed simultaneously. When the grounding rod 2 needs to be removed, the locking screw 9 is rotated in the opposite direction. The structure is simple, the operation is convenient, and the practicality is strong.

Claims

1. A power distribution network grounding protection device, characterized in that: The device includes a base, on which a grounding rod is inserted. The grounding rod has a wire hole that communicates with a cavity within the grounding rod. Symmetrical mounting grooves communicating with the cavity are located on both sides of the grounding rod. Metal spring pieces are placed within these mounting grooves. A locking screw is threaded onto the base. During operation, as the locking screw is continuously screwed into the base, it pushes the metal spring pieces to clamp and fix the grounding wire. Simultaneously, the locking screw enters the mounting groove to position the grounding rod.

2. The power distribution network grounding protection device according to claim 1, characterized in that: The base includes a base plate, on which a protective sleeve is coaxially arranged. A through hole is formed in the protective sleeve and the base plate for the grounding rod to pass through. The locking screw is arranged on the protective sleeve.

3. The power distribution network grounding protection device according to claim 2, characterized in that: The protective sleeve is threadedly connected to the base plate.

4. The power distribution network grounding protection device according to any one of claims 2 or 3, characterized in that: The base plate is provided with multiple downward-extending anchor bars along its circumference.

5. The power distribution network grounding protection device according to claim 1, characterized in that: The wire hole is located on the top side of the grounding rod.

6. The power distribution network grounding protection device according to claim 5, characterized in that: A rubber sealing ring is provided at the wire hole.

7. The power distribution network grounding protection device according to claim 2, characterized in that: Each of the protective sleeves has a threaded hole through its sidewall, and the locking screw is threaded into the threaded hole. The locking screw consists of a threaded sleeve at one end and a push rod at the rear. An adjusting sleeve is elastically and rotatably provided inside the threaded sleeve. The adjusting sleeve has an adjusting groove extending inward from its end along its axis. An adjusting rod is provided at the rear of the adjusting sleeve. An adjusting hole for the adjusting rod to pass through is provided at the bottom of the threaded sleeve. The adjusting hole and the adjusting rod are non-circular.

8. The power distribution network grounding protection device according to claim 7, characterized in that: The inner wall of the threaded sleeve is provided with limit blocks symmetrically protruding radially on both sides, and the adjusting sleeve is provided with stops symmetrically. In the initial state, the stops are located outside the limit blocks.

9. The power distribution network grounding protection device according to any one of claims 7 or 8, characterized in that: The mounting slot is divided into upper and lower parts by a partition. The bottom of the metal spring is provided with a clamping part. One end of the clamping part inside the accommodating cavity is an arc-shaped clamping plate structure, and the other end outside the accommodating cavity extends into the partition space at the bottom of the mounting slot. The push rod corresponds to the space at the bottom of the mounting slot.

10. The power distribution network grounding protection device according to claim 3, characterized in that: The lower part of the protective sleeve is coaxially provided with a frustum-shaped flow guide. After the protective sleeve is connected to the base plate, the protective sleeve and the base plate are in close contact.

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