Improved lightning protection grounding structure for a substation

Abstract

The utility model relates to lightning protection grounding technical field, and disclose an improved lightning protection grounding structure of transformer substation, including vertical connection stake, pressure joint and grounding conductive plate, the top fixed mounting of vertical connection stake has ear seat of grounding pressure line. The improved lightning protection grounding structure of transformer substation, through the cooperation of pressure joint and grounding conductive plate, expand the horizontal direction coverage area of grounding, improve the grounding effect, the grounding cone is inserted to the depth of soil layer through the bottom simultaneously, further improve the depth of grounding, thereby improved the effect of grounding, improved the security of grounding, the grounding cone is inserted to the hole in the ground in the process of carrying out ramming down, after ramming, first pull out the grounding cone upwards, then pour the resistance reduction material into the hole in the ground, then reinsert the grounding cone into the hole, fill the contact gap between the grounding cone and soil through the resistance reduction material, prevent the loose soil from affecting the grounding effect.

Description

Technical Field

[0001] This utility model relates to the field of lightning protection grounding technology, specifically an improved lightning protection grounding structure for substations. Background Technology

[0002] A substation is a place where voltage is changed. To transmit electricity generated by a power plant to a distant location, the voltage must be increased to high voltage, and then reduced as needed near the user. This voltage adjustment process is performed by substations. The main equipment in a substation is switches and transformers. Depending on their size, smaller ones are called substations. Substations are larger than substations. Substations are generally step-down substations with voltage levels below 110kV; substations include both step-up and step-down substations of various voltage levels. Lightning protection is particularly important for substations. Lightning protection refers to the protection technology that prevents damage to the building or its internal equipment caused by direct lightning strikes or electromagnetic pulses from lightning through an integrated system of interception, diversion, and finally grounding. General lightning protection grounding devices simply involve driving piles into the ground, resulting in a small grounding coverage area, poor grounding effect, and the buried portion is easily eroded and rusted by rainwater, affecting conductivity and also impacting the grounding effect. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides an improved substation lightning protection grounding structure, which solves the problem of poor grounding effect.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: an improved substation lightning protection grounding structure, comprising a vertical connecting pile, a crimping device, and a grounding conductive plate. A grounding clamp lug is fixedly installed at the top of the vertical connecting pile, and the bottom of the vertical connecting pile is fixedly installed with the top of the crimping device. The grounding conductive plate is fixedly connected and fixed by the crimping device, and a grounding cone is fixedly installed at the bottom of the crimping device.

[0007] Preferably, the grounding conductive plate is laid in a grid pattern.

[0008] Preferably, a waterproof cover is movably fitted onto the outer wall of the vertical connecting pile, and a reinforcing rib is fixedly installed on the top of the waterproof cover.

[0009] Preferably, the crimping device includes a bottom drag fastener, a connecting top fastener, a plug hole, a fixing top fastener, and a welding opening. The bottom drag fastener is installed at the bottom of the overlapping position of the two grounding conductive plates. The grounding cone is fixedly installed to the bottom of the bottom drag fastener. The plug hole is opened at the top of the connecting top fastener. The connecting top fastener is snapped above the bottom drag fastener at the center position. The top of the vertical connecting pile extends into the interior of the connecting top fastener through the plug hole. The bottom end of the vertical connecting pile contacts the top of the grounding conductive plate. Then, the vertical connecting pile, the connecting top fastener, the bottom drag fastener, and the grounding conductive plate are welded and fixed using a thermite. The fixing top fastener is snapped above the bottom drag fastener located at the perimeter. Thermite is added to the interior through the welding opening to weld the overlapping position of the grounding conductive plates.

[0010] Preferably, a wire mesh is laid at the bottom of the grounding conductive plate, the grounding cone passes through the wire mesh, and the pressing device and the grounding conductive plate are pressed on top of the wire mesh.

[0011] Preferably, the radius of the waterproof cover is greater than the distance between the corner crimping device and the bottom end of the vertical connecting pile.

[0012] Preferably, the diameter of the top end of the grounding cone is larger than the diameter of the bottom end.

[0013] Compared with the prior art, this utility model provides an improved lightning protection grounding structure for substations, which has the following beneficial effects:

[0014] 1. This improved substation lightning protection grounding structure expands the horizontal coverage area of ​​the grounding and improves the grounding effect through the cooperation of the crimping device and the grounding conductive plate. At the same time, the grounding cone at the bottom penetrates deep into the soil layer to further increase the grounding depth, thereby improving the grounding effect and grounding safety.

[0015] 2. In this improved substation lightning protection grounding structure, during the process of driving the grounding cone downwards into the ground, after the driving is completed, the grounding cone is first pulled upwards, and then resistance-reducing material is poured into the hole in the ground. Then the grounding cone is reinserted into the hole. The resistance-reducing material fills the contact gap between the grounding cone and the soil, preventing the soil from becoming loose and affecting the grounding effect.

[0016] 3. This improved substation lightning protection grounding structure, by installing a waterproof cover above the grounding conductive plate and grounding cone, allows rainwater to flow outward along the top of the waterproof cover during rain, preventing direct contact between the rainwater and the grounding conductive plate and grounding cone. This reduces corrosion of the grounding conductive plate and grounding cone, thereby improving the service life and grounding effect of the grounding structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the top structure of the crimping device of this utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure between the bottom drag fastener and the connecting top fastener of this utility model;

[0020] Figure 4 This is a schematic diagram of the bottom drag fastener and the fixed top fastener of this utility model.

[0021] Among them: 1. Vertical connecting pile; 2. Grounding wire clamp; 3. Crimping device; 31. Bottom drag fastener; 32. Top connecting fastener; 33. Insertion hole; 34. Fixed top fastener; 35. Welding opening; 4. Grounding conductive plate; 5. Grounding cone; 6. Waterproof cover; 61. Reinforcing rib; 7. Steel wire mesh. Detailed Implementation

[0022] 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 protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides an improved lightning protection grounding structure for substations, including a vertical connecting pile 1, a crimping device 3, and a grounding conductive plate 4. A grounding clamping lug 2 is fixedly installed at the top of the vertical connecting pile 1, and the bottom end of the vertical connecting pile 1 is fixedly installed with the top of the crimping device 3. The grounding conductive plate 4 is fixedly connected and fixed by the crimping device 3, and a grounding cone 5 is fixedly installed at the bottom of the crimping device 3.

[0024] Furthermore, the grounding conductive plates 4 are laid in a grid pattern, which expands the grounding coverage area. At the same time, a grounding cone 5 is set at the bottom of each grounding conductive plate 4 that is cross-connected to extend downwards for grounding, which improves the grounding effect.

[0025] Furthermore, a waterproof cover 6 is movably fitted onto the outer wall of the vertical connecting pile 1, and a reinforcing rib 61 is fixedly installed on the top of the waterproof cover 6. The reinforcing rib 61 strengthens the waterproof cover 6 and prevents it from deforming or being damaged.

[0026] Furthermore, the crimping device 3 includes a bottom drag fastener 31, a connecting top fastener 32, a plug hole 33, a fixing top fastener 34, and a welding opening 35. The bottom drag fastener 31 is installed at the bottom of the overlapping position of the two grounding conductive plates 4. The grounding cone 5 is fixedly installed to the bottom of the bottom drag fastener 31. The plug hole 33 is opened at the top of the connecting top fastener 32. The connecting top fastener 32 is snapped above the bottom drag fastener 31 at the center position. The top of the vertical connecting pile 1 extends into the connecting top fastener through the plug hole 33. Inside the fixture 32, the bottom end of the vertical connecting pile 1 contacts the top of the grounding conductive plate 4. Then, the vertical connecting pile 1, the connecting top fastener 32, the bottom drag fastener 31 and the grounding conductive plate 4 are welded and fixed by thermite. The bottom drag fastener 31 located around the perimeter is clamped above the fixing top fastener 34. Thermite is added to the interior through the welding opening 35 to weld the overlapping position of the grounding conductive plate 4. The grounding conductive plate 4 is connected and welded by the cooperation of the pressing device 3 and thermite.

[0027] Furthermore, a wire mesh 7 is laid at the bottom of the grounding conductive plate 4, the grounding cone 5 passes through the wire mesh 7, and the pressing device 3 and the grounding conductive plate 4 are pressed on top of the wire mesh 7. The wire mesh 7 provides auxiliary conductivity, further increasing the contact area with the soil and improving the grounding effect.

[0028] Furthermore, the radius of the waterproof cover 6 is greater than the distance between the corner crimping device 3 and the bottom of the vertical connecting pile 1. The waterproof cover 6 blocks the rainwater that seeps downward from above. Under the obstruction of the waterproof cover 6, the rainwater flows outward, preventing the rainwater from directly contacting the grounding conductive plate 4 and grounding cone 5 below. This reduces the corrosion of the grounding conductive plate 4 and grounding cone 5, improves their service life, and allows the grounding conductive plate 4 and grounding cone 5 to maintain a better conductivity, thereby improving the grounding effect.

[0029] Furthermore, the diameter of the top end of the grounding cone 5 is larger than that of the bottom end. When the grounding cone 5 is inserted into the soil, it will push the soil on the outside of the grounding cone 5 to move outward, thereby compacting the soil. This makes the contact between the grounding cone 5 and the soil more consistent after it is inserted into the soil, thus improving the grounding effect.

[0030] During installation: First, dig a square pit for burying the grounding conductive plate 4. After digging, insert the grounding cone 5 into the bottom soil in a grid pattern. After the grounding cone 5 is inserted into the soil, pull it out. This creates multiple holes at the bottom of the pit. Then, add resistance-reducing material into the pit and let it enter the holes. After that, reinsert the grounding cone 5 into the holes. The resistance-reducing material fills the contact gap between the grounding cone 5 and the soil, preventing the soil from becoming loose and affecting the grounding effect. Then, lay the grounding conductive plate 4 at the bottom of the pit and clip it onto the bottom support fastener 31. Then, clip the connecting top fastener 32 and the fixing top fastener 34 onto the corresponding bottom support fastener 31. Insert the vertical connecting stake 1 into the insertion hole 33. The inside of the device contacts the top of the grounding conductive plate 4, and then the pressing device 3 is welded using aluminothermic welding equipment. Aluminothermic agent is injected into the inside of the connecting top fastener 32 and the fixing top fastener 34. The high temperature of the aluminothermic agent welds the vertical connecting pile 1 and the grounding conductive plate 4 together. At the same time, the aluminothermic agent welds the pressed grounding conductive plate 4. After the welding is completed, the waterproof cover 6 is pushed upward along the outside of the vertical connecting pile 1. Then, a 20cm thick layer of soil is placed on top of the grounding conductive plate 4 and compacted. Then, the waterproof cover 6 is placed on top of the compacted soil. Then, soil is covered on top of the waterproof cover 6 and compacted. Finally, the grounding wire is connected to the grounding pressure ear 2 to complete the grounding installation.

[0031] When it rains: Rainwater seeps downwards through the ground. When the rainwater seeps to the top of the waterproof cover 6, it is blocked by the waterproof cover 6 and flows outwards along the waterproof cover 6. The rainwater will continue to seep downwards only after it flows outwards to the outside of the waterproof cover 6. This prevents the grounding conductive plate 4 and the grounding cone 5 below the waterproof cover 6 from directly contacting the rainwater and being eroded by the rainwater. This prevents the grounding conductive plate 4 and the grounding cone 5 from rusting. By reducing rainwater erosion, the grounding effect can be improved.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An improved lightning protection grounding structure for substations, comprising vertical connecting piles (1), a crimping device (3), and a grounding conductive plate (4), characterized in that: The top of the vertical connecting pile (1) is fixedly installed with a grounding pressure ear (2), the bottom of the vertical connecting pile (1) is fixedly installed with the top of the crimping device (3), the grounding conductive plate (4) is fixedly connected by the crimping device (3), and the bottom of the crimping device (3) is fixedly installed with a grounding cone (5).

2. The improved substation lightning protection grounding structure according to claim 1, characterized in that: The grounding conductive plate (4) is laid in a grid pattern.

3. The improved substation lightning protection grounding structure according to claim 1, characterized in that: The outer wall of the vertical connecting pile (1) is movably fitted with a waterproof cover (6), and a reinforcing rib (61) is fixedly installed on the top of the waterproof cover (6).

4. The improved substation lightning protection grounding structure according to claim 1, characterized in that: The crimping device (3) includes a bottom drag fastener (31), a connecting top fastener (32), a plug hole (33), a fixing top fastener (34), and a welding opening (35). The bottom drag fastener (31) is installed at the bottom of the overlapping position of the two grounding conductive plates (4). The grounding cone (5) is fixedly installed to the bottom of the bottom drag fastener (31). The plug hole (33) is opened at the top of the connecting top fastener (32). The connecting top fastener (32) is locked above the bottom drag fastener (31) at the center position. The vertical connection... The top of the pile (1) extends into the top fastener (32) through the insertion hole (33). The bottom of the vertical connecting pile (1) contacts the top of the grounding conductive plate (4). Then, the vertical connecting pile (1), the top fastener (32), the bottom drag fastener (31) and the grounding conductive plate (4) are welded and fixed by thermite. The bottom drag fastener (31) located around the perimeter is clamped with the top fastener (34). Thermite is added to the inside through the welding opening (35) to weld the overlapping position of the grounding conductive plate (4).

5. An improved substation lightning protection grounding structure according to claim 1, characterized in that: The bottom of the grounding conductive plate (4) is covered with a wire mesh (7), the grounding cone (5) passes through the wire mesh (7), and the pressing device (3) and the grounding conductive plate (4) are pressed on top of the wire mesh (7).

6. An improved substation lightning protection grounding structure according to claim 3, characterized in that: The radius of the waterproof cover (6) is greater than the distance between the corner crimping device (3) and the bottom of the vertical connecting pile (1).

7. An improved substation lightning protection grounding structure according to claim 1, characterized in that: The diameter of the top end of the grounding cone (5) is greater than the diameter of the bottom end.

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