A modular lightning protection grounding assembly suitable for cold regions

Abstract

The application relates to a modular lightning protection grounding assembly suitable for cold regions, and relates to the technical field of lightning protection grounding devices.The modular lightning protection grounding assembly suitable for cold regions comprises a vertical grounding module, a horizontal grounding module, a connecting module, a resistance reduction module and a monitoring module; the vertical grounding module comprises at least two copper-clad steel grounding poles, the copper-clad steel grounding poles are connected through threads, the top end of the copper-clad steel grounding pole is provided with a conical guide head, the copper-clad steel grounding pole is externally sleeved with a steel sleeve, and the steel sleeve is provided with a hanging ring; the horizontal grounding module is a graphite flexible grounding body, the graphite flexible grounding body is connected with the vertical grounding module through the connecting module; the resistance reduction module comprises composite resistance reduction filler and a graphite reinforcing layer, the composite resistance reduction filler is filled around the vertical grounding module and the horizontal grounding module, and the graphite reinforcing layer is wrapped outside the copper-clad steel grounding pole; the monitoring module comprises a temperature sensor, a grounding resistance monitoring module and a steam heating device, and the temperature sensor and the grounding resistance monitoring module are arranged near the vertical grounding module.

Description

Technical Field

[0001] This application relates to the field of lightning protection grounding devices, and in particular to a modular lightning protection grounding assembly suitable for cold regions. Background Technology

[0002] In cold regions, traditional lightning protection grounding components face numerous challenges due to the presence of seasonal and permanent permafrost. Freeze-thaw cycles and thawing settlement of the permafrost can cause deformation and breakage of the grounding electrode, affecting grounding performance. Simultaneously, the low temperatures in cold regions increase soil resistivity, leading to unstable grounding resistance and difficulty in meeting lightning protection requirements. Furthermore, traditional grounding electrodes are difficult to install and maintain in cold regions, are susceptible to corrosion, and have a short service life. In existing technologies, grounding electrodes mostly use a single material and structure, which is difficult to adapt to the complex geological and climatic conditions in cold regions. Utility Model Content

[0003] This application provides a modular lightning protection grounding assembly suitable for cold regions, which solves the problems of unstable grounding performance and inconvenient installation and maintenance of existing lightning protection grounding assemblies for cold regions.

[0004] This application provides a modular lightning protection grounding assembly suitable for cold regions, including a vertical grounding module, a horizontal grounding module, a connection module, a resistance reduction module, and a monitoring module. The vertical grounding module includes at least two copper-clad steel grounding electrodes, which are connected by threads. The top of each copper-clad steel grounding electrode has a conical guide head, and a steel sleeve is fitted over it, with a hanging ring on the sleeve. The horizontal grounding module is a graphite flexible grounding body, which is connected to the vertical grounding module through the connection module. The resistance reduction module includes a composite resistance-reducing filler and a graphite reinforcement layer. The composite resistance-reducing filler is filled around the vertical and horizontal grounding modules, and the graphite reinforcement layer is wrapped around the copper-clad steel grounding electrode. The monitoring module includes a temperature sensor, a grounding resistance monitoring module, and a steam heating device. The temperature sensor and the grounding resistance monitoring module are located near the vertical grounding module, and the steam heating device is correspondingly installed with respect to the vertical grounding module.

[0005] In some embodiments of this application, the diameter of the copper-clad steel grounding electrode is 30mm and the length of a single section is ≤2m.

[0006] In some embodiments of this application, the connection module includes a brass terminal bolt and a pin, which are interference-fitted and welded together.

[0007] In some embodiments of this application, the composite drag-reducing filler is a TEREC+ ionic drag-reducing agent, which contains ethylene glycol antifreeze and polyacrylamide dispersant.

[0008] In some embodiments of this application, the graphite reinforcement layer is expanded graphite.

[0009] In some embodiments of this application, the graphite flexible grounding electrode has a cross-section of 250 mm² and is laid in a serpentine pattern.

[0010] In some embodiments of this application, an anti-corrosion module is also included. The anti-corrosion module includes a magnesium alloy sacrificial anode and a polyethylene sheath. The magnesium alloy sacrificial anode is disposed around the grounding grid, and the polyethylene sheath is 3mm thick and is wrapped around the outside of the grounding body.

[0011] In some embodiments of this application, the monitoring module uploads data via NB-IoT, and one monitoring node is configured for every five modules.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This utility model adopts a modular design. The vertical grounding module is composed of multiple copper-clad steel grounding electrodes connected by threads, which facilitates transportation, installation and maintenance. The length can be adjusted according to actual needs to adapt to different depths of frozen soil. The vertical grounding module has a conical guide head at the top, which can reduce the resistance to penetrating frozen soil and facilitate installation; the external steel sleeve and hanging ring facilitate the removal and replacement of the grounding electrode. The horizontal grounding module uses a flexible graphite grounding electrode, which is laid in a serpentine pattern to adapt to soil deformation caused by freeze-thaw cycles, while reducing the amount of excavation in rocky areas. The resistance reduction module uses a composite resistance reduction filler and a graphite reinforcement layer. The composite resistance reduction filler contains ethylene glycol antifreeze, which can still maintain liquid permeability at low temperatures. The graphite reinforcement layer adsorbs soil moisture through capillary action. The two work together to effectively reduce the grounding resistance and ensure the stability of the grounding resistance. The monitoring module can monitor the grounding resistance and soil temperature in real time. When an abnormality occurs, the steam heating device will start in time to melt the surrounding frozen soil, restore the grounding performance, and ensure the reliable operation of the grounding system. The anti-corrosion module uses a magnesium alloy sacrificial anode and a polyethylene sheath, which effectively improves the corrosion resistance of the grounding components, extends their service life, and adapts to harsh environments such as cold regions with saline permafrost. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0014] Figure 1 This is a schematic diagram of a modular lightning protection grounding assembly suitable for cold regions, provided as an embodiment of this application.

[0015] Reference numerals: 1-Vertical grounding module; 11-Copper-clad steel grounding electrode; 12-Conical guide head; 13-Steel sleeve; 14-Hanging ring; 15-Anti-theft chain; 2-Horizontal grounding module; 21-Connection module; 3-Resistance reduction module; 31-Graphite reinforcement layer; 4-Monitoring module; 41-Temperature sensor. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0018] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0020] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0021] A modular lightning protection grounding assembly suitable for cold regions includes a vertical grounding module, a horizontal grounding module, a connection module, a resistance reduction module, and a monitoring module.

[0022] The vertical grounding module includes at least two copper-clad steel grounding electrodes, which are connected by threads. The top of the copper-clad steel grounding electrode is provided with a conical guide head, and a steel sleeve is provided on the outside. The steel sleeve is provided with a hanging ring. The horizontal grounding module is a graphite flexible grounding body, which is connected to the vertical grounding module through a connecting module. The resistance reduction module includes a composite resistance reduction filler and a graphite reinforcement layer. The composite resistance reduction filler is filled around the vertical grounding module and the horizontal grounding module, and the graphite reinforcement layer is wrapped around the copper-clad steel grounding electrode. The monitoring module includes a temperature sensor, a grounding resistance monitoring module, and a steam heating device. The temperature sensor and the grounding resistance monitoring module are located near the vertical grounding module, and the steam heating device is set up corresponding to the vertical grounding module. Furthermore, the diameter of the copper-clad steel grounding electrode is 30mm, and the length of a single section is ≤2m. Furthermore, the connecting module includes brass wiring bolts and pins, which are interference-fitted and welded together. Furthermore, the composite drag-reducing filler is a TEREC+ ionic drag-reducing agent, which contains ethylene glycol antifreeze components and polyacrylamide dispersant, with a freezing point of -60℃ and a resistivity of 0.1-0.3Ω·m. Furthermore, the graphite reinforcement layer is expanded graphite with an equivalent surface area of ​​50-200 m² / g. Furthermore, the graphite flexible grounding electrode has a cross-section of 250mm² and is laid in a serpentine pattern. Furthermore, it also includes an anti-corrosion module, which includes a magnesium alloy sacrificial anode and a polyethylene sheath. The magnesium alloy sacrificial anode is located around the grounding grid, and the polyethylene sheath is 3mm thick and is wrapped around the outside of the grounding body. Furthermore, the steam heating device has a power of 5kW and a response time of <10min. Furthermore, the monitoring module uploads data via NB-IoT, with one monitoring node configured for every five modules. Furthermore, an anti-theft chain is attached to the steel sleeve.

[0023] This application provides a modular lightning protection grounding assembly suitable for cold regions. Please refer to... Figure 1 It includes a vertical grounding module 1, a horizontal grounding module 2, a connection module 21, a resistance reduction module 3, and a monitoring module 4.

[0024] The vertical grounding module 1 consists of three copper-clad steel grounding electrodes 11. The copper-clad steel grounding electrodes 11 are made of a copper-clad steel composite material, which combines the corrosion resistance of copper with the mechanical strength of steel, and can withstand frost heave stress at -50℃. They are cylindrical in shape, with a diameter of 30mm and a single section length of 2m. The sections are connected by threads to form a vertical grounding structure with a total length of 6m, capable of penetrating a 2.1m layer of frozen soil.

[0025] A conical guide head 12 is provided at the top of the copper-clad steel grounding electrode 11. The conical guide head 12 is conical in shape and made of high-strength alloy material. Its function is to reduce the resistance to penetrating frozen soil and facilitate the installation of the vertical grounding module 1. A steel sleeve 13 is fitted over the copper-clad steel grounding electrode 11. The steel sleeve 13 is a cylindrical tubular structure made of high-quality carbon structural steel. It is installed on the outside of the copper-clad steel grounding electrode 11 by means of a sleeve connection, and plays a protective role for the copper-clad steel grounding electrode 11.

[0026] The steel sleeve 13 is equipped with a hanging ring 14. The hanging ring 14 is a ring-shaped structure made of the same material as the steel sleeve 13 and is fixed to the steel sleeve 13 by welding, facilitating the removal and replacement of the grounding electrode. An anti-theft chain 15 is also connected to the steel sleeve 13. The anti-theft chain 15 is a metal chain structure, with one end fixed to the steel sleeve 13 by welding or bolting, and the other end fixed to a fixed object on the ground, serving an anti-theft function.

[0027] The horizontal grounding module 2 is a flexible graphite grounding electrode made of graphite composite material, possessing good conductivity and flexibility. It has a cross-section of 250 mm² and is laid in a serpentine pattern. This serpentine laying method allows it to adapt to soil deformation caused by freeze-thaw cycles, while reducing excavation in rocky areas. The horizontal grounding module 2 is connected to the vertical grounding module 1 via a connecting module 21. Its position extends laterally from the side of the vertical grounding module 1, distributed horizontally at a certain depth below the ground surface.

[0028] The connection module 21 includes brass connecting bolts and pins, both made of brass, which has good conductivity and corrosion resistance. The brass connecting bolts and pins are connected by an interference fit and welded fixation method to ensure a firm connection and conductivity. One end of the connection module 21 is connected to the copper-clad steel grounding electrode 11 in the vertical grounding module 1, and the other end is connected to the graphite flexible grounding body in the horizontal grounding module 2. The mechanical connection and electrical conduction between the two are achieved through bolt tightening and pin positioning. Its function is to connect the horizontal grounding module 2 and the vertical grounding module 1 into a unified grounding network, enabling effective current conduction.

[0029] The resistance-reducing module 3 includes a composite resistance-reducing filler and a graphite reinforcement layer 31. The composite resistance-reducing filler is a TEREC+ ionic resistance-reducing agent, containing ethylene glycol antifreeze and polyacrylamide dispersant, with a freezing point of -60℃ and a resistivity of 0.1-0.3 Ω·m. The composite resistance-reducing filler is used to fill the soil voids around the vertical grounding module 1 and the area below and around the horizontal grounding module 2, forming a low-resistance region through full contact with the grounding modules, thereby reducing the grounding resistance.

[0030] The graphite reinforcement layer 31 is made of expanded graphite with an equivalent surface area of ​​50-200 m² / g. It is layered and wrapped around the outside of the copper-clad steel grounding electrode 11, and is tightly bonded to the copper-clad steel grounding electrode 11. The expanded graphite adsorbs soil moisture through capillary action and can still maintain a soil conductivity >0.01 S / m at -20℃. Together with the composite resistance-reducing filler, it effectively reduces the grounding resistance and ensures its stability.

[0031] The monitoring module 4 includes a temperature sensor 41, a grounding resistance monitoring module 4, and a steam heating device. The steam heating device is a 5kW device with a response time of <10min. Its installation position corresponds to that of the vertical grounding module 1, that is, it is located in the soil directly above or to the side of the vertical grounding module 1, maintaining a certain distance from the vertical grounding module 1 but capable of heating the surrounding soil. When abnormal grounding resistance or excessively low temperature is detected, the steam heating device is activated, generating steam to melt the surrounding frozen soil and restore grounding performance.

[0032] The anti-corrosion module consists of a magnesium alloy sacrificial anode and a polyethylene sheath. The magnesium alloy sacrificial anode is a block-shaped structure made of magnesium alloy, with an open-circuit potential of -1.5V. It is located around the grounding grid, specifically in the soil surrounding the grounding network composed of vertical grounding module 1 and horizontal grounding module 2. Through electrochemical action, it sacrifices itself to protect the grounding electrode and reduce the metal corrosion rate. The polyethylene sheath is 3mm thick and made of polyethylene, possessing good insulation and corrosion resistance. It wraps around the grounding electrode (including vertical grounding module 1 and horizontal grounding module 2) to isolate it from the surrounding soil. In saline-alkali frozen soil areas, it can withstand Cl... - Corrosion at concentrations >5000 mg / L serves as insulation and corrosion protection.

[0033] The temperature sensor 41 and the grounding resistance monitoring module 4 are located near the vertical grounding module 1. Here, "near" means that the temperature sensor 41 and the grounding resistance monitoring module 4 are installed within a range of 30-50cm around the vertical grounding module 1.

[0034] In terms of their condition, they are usually buried in the soil at the same depth or slightly shallower than the vertical grounding module 1, and there is no direct mechanical connection between them and the vertical grounding module 1, but they are in the soil environment around it.

[0035] This setup ensures that the sensor and monitoring module 4 accurately collect soil temperature and grounding resistance data related to the vertical grounding module 1, as excessive distance can lead to data distortion and fail to accurately reflect the working environment of the vertical grounding module 1. It also avoids direct contact with the vertical grounding module 1, which could affect its structural stability and current conduction. Furthermore, it facilitates installation and maintenance, ensuring real-time and accurate monitoring and providing a reliable basis for starting the steam heating device.

[0036] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0037] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A modular lightning protection grounding assembly suitable for cold regions, characterized in that, It includes a vertical grounding module, a horizontal grounding module, a connection module, a resistance reduction module, and a monitoring module; The vertical grounding module includes at least two copper-clad steel grounding electrodes, each copper-clad steel grounding electrode is connected by threads, the top of the copper-clad steel grounding electrode is provided with a conical guide head, and a steel sleeve is provided on the outside, with a hanging ring on the steel sleeve. The horizontal grounding module is a graphite flexible grounding body, and the graphite flexible grounding body is connected to the vertical grounding module through a connecting module; The resistance reduction module includes a composite resistance reduction filler and a graphite reinforcement layer. The composite resistance reduction filler is filled around the vertical grounding module and the horizontal grounding module, and the graphite reinforcement layer is wrapped around the copper-clad steel grounding electrode. The monitoring module includes a temperature sensor, a grounding resistance monitoring module, and a steam heating device. The temperature sensor and the grounding resistance monitoring module are located near the vertical grounding module, and the steam heating device is set up corresponding to the vertical grounding module.

2. A modular lightning protection grounding assembly suitable for cold regions according to claim 1, characterized in that, The copper-clad steel grounding electrode has a diameter of 30mm and a single section length of ≤2m.

3. A modular lightning protection grounding assembly suitable for cold regions according to claim 1, characterized in that, The connection module includes a brass terminal bolt and a pin, wherein the brass terminal bolt and the pin are interference-fitted and welded together.

4. A modular lightning protection grounding assembly suitable for cold regions according to claim 1, characterized in that, The composite drag-reducing filler is a TEREC+ ionic drag-reducing agent, which contains ethylene glycol antifreeze and polyacrylamide dispersant.

5. A modular lightning protection grounding assembly suitable for cold regions according to claim 1, characterized in that, The graphite reinforcement layer is expanded graphite.

6. A modular lightning protection grounding assembly suitable for cold regions according to any one of claims 1 to 5, characterized in that, The graphite flexible grounding electrode has a cross-section of 250 mm² and is laid in a serpentine pattern.

7. A modular lightning protection grounding assembly suitable for cold regions according to any one of claims 1 to 5, characterized in that, It also includes an anti-corrosion module, which consists of a magnesium alloy sacrificial anode and a polyethylene sheath. The magnesium alloy sacrificial anode is located around the grounding grid, and the polyethylene sheath is 3mm thick and is wrapped around the outside of the grounding body.

8. A modular lightning protection grounding assembly suitable for cold regions according to claim 1, characterized in that, The monitoring module uploads data via NB-IoT, with one monitoring node configured for every five modules.

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