A lightning protection device and air termination for a building

Abstract

The utility model belongs to the lightning protection technical field of building, specifically related to a building lightning protection device and lightning receptor, through setting up a plurality of lightning receptor receiving charge in the cloud layer of different position of building top in the top wall of building, reduce the probability of building suffering from lightning stroke, through setting up mounting seat and wire clamp plate clamping lightning strip and fixing mounting on the top wall, the convenient lightning strip and lightning receptor's dress draw, single lightning receptor loosening still can fix lightning strip on the top wall with the rest lightning receptor, through clamping and fixing lightning strip between fastening screw rod and lightning rod, also can make lightning strip hook and press connection on the top wall with lightning receptor, improve the installation reliability of lightning receptor and lightning strip. Lightning receptor realizes the reception of thunder and lightning through setting lightning rod, through setting up by fastening nut and fastening screw rod cooperation control's resistance to tight wire clamp plate, makes wire clamp plate and mounting seat up and down cooperation clamping lightning strip, improves the connection reliability of whole lightning receptor and lightning strip.

Description

Technical Field

[0001] This utility model belongs to the field of building lightning protection technology, specifically relating to a building lightning protection device and lightning arrester. Background Technology

[0002] Lightning protection for buildings has always been an indispensable part of construction. The traditional method involves installing lightning rods on the roof of the building. These rods, taking advantage of their height, conduct electrical charges from the clouds to the ground, thus preventing the building from being struck by lightning. Galvanized steel lightning rods are low-cost, high-strength, and widely used. They are typically fixed to the highest point of the building's wall using bolts or welding. However, because lightning rods are constantly exposed to the elements, they are prone to corrosion and can easily detach from the building's exterior, posing a risk of falling debris and injuring people or damaging property. While lightning rods have a simple structure, modern buildings often use reinforced concrete structures, and some buildings have complex internal structures, making it difficult for lightning rods alone to provide comprehensive protection, leading to potential protection failures. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a building lightning protection device and a lightning rod, improve the connection reliability of the lightning rod and the lightning protection belt, and securely fix the two to the top of the building.

[0004] The technical solution adopted by this utility model to solve the technical problem is: a lightning protection device for buildings, including a lightning protection strip, an air receiver, a down conductor base, and a down conductor installed on the top wall of a building; the length direction of the lightning protection strip is arranged along the length direction of the projection of the top wall onto the horizontal plane; multiple air receivers and down conductor bases are provided and distributed along the length direction of the lightning protection strip, and multiple air receivers and down conductor bases are connected in series through the same lightning protection strip; the down conductor base is located at the corner of the top wall of the building;

[0005] The lightning arrester includes a mounting base fixedly mounted on a top wall, a lightning rod vertically mounted on the top surface of the mounting base, a fastening screw vertically mounted on the top surface of the mounting base, a fastening nut threaded onto the fastening screw, and a clamping plate located between the fastening nut and the mounting base; the clamping plate has a guide hole, the fastening screw passes through the guide hole and the two are clearance-fitted; the fastening nut abuts against the clamping plate, causing the mounting base and the clamping plate to cooperate in clamping the lightning protection strip; the lightning protection strip is located between the fastening screw and the lightning rod;

[0006] The lightning protection strip and the down conductor are connected through the down conductor base, and the lower end of the down conductor is grounded.

[0007] Furthermore, both the lightning protection strip and the down conductor are made of copper stranded wire, and both the lightning arrester and the down conductor base are made of copper.

[0008] Furthermore, the clamping plate is provided with inclined pressure plates on the side walls on both sides of the lightning protection strip. The inclined pressure plates are arranged inclined upward from the end away from the guide hole to the end closer to the guide hole.

[0009] Furthermore, the mounting base is also provided with a limiting plate, which is located between the lightning rod and the fastening screw. The limiting plate is arranged inclined upward from the side away from the lightning rod to the side closer to the lightning rod.

[0010] Furthermore, the down conductor seat includes a fixed seat fixedly mounted on the top wall, a limiting rod vertically mounted on the top surface of the fixed seat, and a threaded seat fixed to the upper end of the limiting rod. The threaded seat has a threaded hole parallel to the limiting rod. The limiting rod is located on the side of the threaded hole near the inner corner line of the top wall and inside the lightning protection strip. A crimping screw is threaded into the threaded hole, and the crimping screw and the fixed seat cooperate to clamp the lightning protection strip and the down conductor.

[0011] Furthermore, both the mounting base and the fixing base are provided with multiple anchoring through holes, and the anchoring bolts pass through the anchoring through holes to anchor the mounting base and the fixing base to the top wall; the top of the mounting base is provided with a connecting screw, and the lower end of the lightning rod is coaxially connected with an adapter nut, which is sleeved on the outside of the connecting screw and threadedly connected to it.

[0012] Furthermore, multiple limiting rods are provided, and the multiple limiting rods are evenly distributed along the circumference of the crimping screw, with two adjacent limiting rods arranged at intervals; the upper ends of the lightning protection strip and the down conductor are both located between two adjacent limiting rods.

[0013] Furthermore, an auxiliary lightning rod integrally formed with the upper end of the crimping screw is provided.

[0014] A lightning arrester for use in any of the above-described building lightning protection devices includes a mounting base, a lightning rod vertically disposed on the top surface of the mounting base, a fastening screw vertically disposed on the top surface of the mounting base, a fastening nut threadedly connected to the fastening screw, and a clamping plate located between the fastening nut and the mounting base; the clamping plate is provided with a guide through hole, and the fastening screw passes through the guide through hole with a clearance fit between the two.

[0015] Furthermore, inclined pressure plates are provided on both the side wall of the clamping plate near the lightning rod and the side wall away from the lightning rod, and the inclined pressure plates are arranged inclined upward from the end away from the guide through hole to the end near the guide through hole;

[0016] The mounting base is also provided with a limiting plate, which is located between the lightning rod and the fastening screw. The limiting plate is arranged inclined upward from the side away from the lightning rod to the side closer to the lightning rod.

[0017] Compared with existing technologies, the advantages of this utility model are: it provides a building lightning protection device where, when lightning strikes above a building, the lightning rod directly receives the charge from the clouds and conducts it to the lightning protection strip, which then leads it to the ground via a down conductor, preventing the entire building from being struck by lightning. By installing multiple lightning rods connected in series on the top wall of the building, multiple lightning rods are installed to receive the charge from clouds at different locations on the top of the building, providing comprehensive protection and further reducing the probability of the building being struck by lightning. The lightning rods are fixed to the top wall by mounting bases and clamping plates on the lightning rods, facilitating the installation and removal of the lightning protection strips and lightning rods. Even if a single lightning rod becomes loose, the remaining lightning rods will still hold the lightning protection strip to the top wall. Simultaneously, by clamping the lightning protection strip between the fastening screw and the lightning rod, the lightning protection strip can hook and press the lightning rod onto the top wall, preventing it from falling from a height and causing harm, thereby improving the installation reliability and safety of the lightning rods and lightning protection strips.

[0018] A lightning arrester is provided for use in the lightning protection device of the aforementioned building. It receives lightning by setting up a lightning rod and clamps the lightning protection strip by setting up a clamping plate controlled by a fastening nut and a fastening screw, thereby improving the connection reliability of the entire lightning arrester and lightning protection strip. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the lightning protection device for buildings in this utility model;

[0020] Figure 2 yes Figure 1 Enlarged structural diagram of section A in the middle;

[0021] Figure 3 yes Figure 1 Enlarged structural diagram of section B in the middle;

[0022] Figure 4 This is a schematic diagram of the structure of one embodiment of the lightning arrester of this utility model;

[0023] Figure 5 This is a cross-sectional view of the lightning arrester in this utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the lead-out connector in this utility model;

[0025] Reference numerals in the attached diagram: 1-Lightning protection strip; 2-Lightning arrester; 21-Mounting base; 211-Anchoring through hole; 212-Connecting screw; 213-Limiting plate; 22-Lightning rod; 221-Adapter nut; 23-Fastening screw; 24-Fastening nut; 25-Wire clamping plate; 251-Guide through hole; 252-Inclined pressure plate; 3-Down conductor seat; 31-Fixing base; 32-Limiting rod; 33-Threaded seat; 331-Threaded hole; 34-Crimping screw; 341-Auxiliary lightning rod; 4-Down conductor; 9-Top wall. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] As attached Figure 1-6 As shown, a lightning protection device for a building includes a lightning rod 1, an air receiver 2, a down conductor base 3, and a down conductor 4, all installed on the top wall 9 of the building. The lightning rod 1 is arranged along the length of the projection of the top wall 9 onto a horizontal plane. Multiple air receivers 2 and down conductor bases 3 are provided and distributed along the length of the lightning rod 1, and multiple air receivers 2 and down conductor bases 3 are connected in series through the same lightning rod 1. The down conductor base 3 is located at a corner of the top wall 9 of the building. The air receiver 2 includes a mounting base 21 fixedly installed on the top wall 9, a lightning rod 22 vertically installed on the top surface of the mounting base 21, and a lightning conductor 4 vertically installed on the top wall 9. The mounting base 21 has a fastening screw 23 on its top surface, a fastening nut 24 threaded onto the fastening screw 23, and a clamping plate 25 located between the fastening nut 24 and the mounting base 21. The clamping plate 25 has a guide hole 251 through which the fastening screw 23 passes, with a clearance fit between them. The fastening nut 24 abuts against the clamping plate 25, causing the mounting base 21 and the clamping plate 25 to clamp the lightning protection strip 1. The lightning protection strip 1 is located between the fastening screw 23 and the lightning rod 22. The lightning protection strip 1 and the down conductor 4 are connected through a down conductor seat 3, and the lower end of the down conductor 4 is grounded. It is required that there be at least two down conductor seats 3 and two down conductors 4.

[0028] The lightning rod 22 of the lightning arrester 2 protrudes upward from the top surface of the entire building. It is used to directly conduct the charge in the cloud to the entire lightning arrester 2. The lightning arrester 2 conducts the received charge to the lightning protection strip 1. The charge on the lightning protection strip 1 is introduced into the ground through the down conductor 4, thereby preventing the entire building from being struck by lightning. This invention provides comprehensive protection for a building by installing multiple lightning rods 2, connected in series by the same lightning protection strip 1, on the top surface of the building's top wall 9. These lightning rods receive charges from clouds at different locations on the building's top, further reducing the probability of lightning strikes. The lightning rods 1 are secured to the top wall 9 by mounting bases 21 and clamping plates 25 on the lightning rods 2, facilitating the installation and removal of the lightning rods 1 and lightning rods 2. Even if one lightning rod 2 becomes loose, the others will still hold the lightning rod 1 in place. Furthermore, by clamping the lightning rod 1 between the fastening screw 23 and the lightning rod 22, the lightning rod 1 can hook and press the lightning rods onto the top wall 9, preventing them from falling from heights and causing damage. This improves the reliability and safety of the installation of the lightning rods 2 and the lightning protection strip 1.

[0029] The lightning protection strip 1 connects multiple air receivers 2 in series. While horizontally hooking and clamping the air receivers 2, the mounting bases 21 on the air receivers 2 are also pressed against the top wall 9 to prevent the air receivers 2 from loosening and falling, thus improving their installation stability. During installation, the lightning protection strip 1 must be flat, and the lightning protection strip 1 between two adjacent air receivers 2, and between the air receiver 2 and the down conductor base 3, should be in a tensioned state as much as possible to ensure that it tightly presses the mounting bases 1 on the air receivers 2 against the top wall 9. The down conductor 4 is connected to the lightning protection strip 1 and is used to transfer the charge on the lightning protection strip 1 to the ground, achieving grounding conductivity. The lightning protection strip 1 and the down conductor 4 can be made of galvanized steel bars, stainless steel bars, or steel stranded ropes, etc. The air receivers 2 and the down conductor base 3 are generally made of stainless steel. Preferably, the lightning protection strip 1 and the down conductor 4 are both copper stranded wires, and the air receivers 2 and the down conductor base 3 are both made of copper. Copper has high electrical conductivity, effectively conducting lightning current while resisting corrosion from the atmosphere and soil, resulting in high reliability. Furthermore, grounding terminals are generally made of copper, and using copper in the above structure facilitates fusion welding with the grounding terminal. The lightning protection strip 1 and down conductor 4 can also be made of copper-clad steel, saving costs.

[0030] The lightning arrester 2 receives lightning and conducts it to the lightning protection strip 1. The down conductor holder 3 connects the lightning protection strip 1 and the down conductor 4 and fixes the down conductor 4 to it. To further ensure building safety, preferably, multiple lightning arresters 2 are distributed along the length of the lightning protection strip 1, and the number of lightning arresters 2 is greater than the number of the top wall 9 of the building; the number of down conductor holders 3 is the same as the number of inner corners of the top wall 9. The top wall 9 described in this application is generally the parapet wall at the top of the building, and its inner corners are generally more than four.

[0031] The mounting base 21 on the lightning arrester 2 is used to fix the entire lightning arrester 2 to the top wall 1. It can be connected to the top wall 1 by concrete pouring. Preferably, both the mounting base 21 and the fixing base 31 are provided with multiple anchoring through holes 211. Anchoring bolts pass through the anchoring through holes 211 to anchor the mounting base 21 to the top wall 9. The lightning arrester 2 is detachably connected to the top wall, which is convenient for installation, disassembly, maintenance, and recycling.

[0032] The lightning rod 22 on the lightning arrester 2 is used to directly contact lightning and conduct the charge to the lightning arrester 2. The lightning rod 22 can be installed on the side close to the exterior wall of the building or on the side away from the exterior wall of the building. The lightning rod 22 and the mounting base 21 can be connected by welding, bolting, or interference fit. Preferably, the top of the mounting base 21 is provided with a connecting screw 212 vertically, and the lower end of the lightning rod 22 is coaxially connected with an adapter nut 221, which is threaded onto the connecting screw 212. The structure is simple, easy to assemble and disassemble, and allows the lightning rod 22 to be easily removed from the bottom of the lightning arrester 2 for separate transportation. The connecting screw 212 is generally welded to the mounting base 21, and the adapter nut 221 is welded to the lightning rod 22.

[0033] The fastening screw 23 on the lightning arrester 2 is generally welded to the mounting base 21. It is used to position the clamping plate 25 in the horizontal direction and to guide the vertical movement of the clamping plate 25. In addition, the fastening screw 23 also cooperates with the lightning rod 22 to achieve horizontal radial limitation of the lightning protection strip 1. The fastening nut 24 is used to limit the vertical movement of the clamping plate 25, making its distance from the top surface of the mounting base 1 adjustable, and also facilitating the installation and removal of the clamping plate 25. The clamping plate 25 is used to cooperate with the mounting plate to clamp and fix the lightning protection strip 1 to the top wall 9. Preferably, the side walls of the clamping plate 25 on both sides of the lightning protection strip 1 are provided with inclined pressure plates 252, and the inclined pressure plates 252 are arranged inclined upward from the end away from the guide through hole 251 to the end closer to the guide through hole 251. The inclined pressure plate 252 is used to block the lightning protection strip 1 in the horizontal direction, so as to prevent the lightning protection strip 1 from coming off horizontally and radially, which would cause the clamping plate 25 to fail, and improve the connection reliability of the lightning arrester 2 and the lightning protection strip 1.

[0034] As a further preferred embodiment, the mounting base 21 is also provided with a limiting plate 213, which is located between the lightning rod 22 and the fastening screw 23. The limiting plate 213 is arranged inclined upwards from the side closer to the fastening screw 23 to the side farther away from the fastening screw 23. It is required that the limiting plate 213 and the inclined pressure plate 252 are arranged axially offset within the lightning protection strip 1 to avoid vertical interference between them, which would affect the mutual clamping of the clamping plate 25 and the mounting base 21 to clamp the lightning protection strip, thereby further improving the connection reliability of the lightning arrester 2 and the lightning protection strip 1.

[0035] The down conductor holder 3 has various structural forms. Preferably, the down conductor holder 3 includes a fixed base 31 fixedly mounted on the top wall 9, a limiting rod 32 vertically mounted on the top surface of the fixed base 31, and a threaded seat 33 fixed to the upper end of the limiting rod 32. The threaded seat 33 has a threaded hole 331 parallel to the limiting rod 32. The limiting rod 32 is located on the side of the threaded hole 331 near the inner corner line of the top wall 9 and inside the lightning protection strip 1. A crimping screw 34 is threaded into the threaded hole 331. The crimping screw 34 and the fixed base 31 cooperate to clamp the lightning protection strip 1 and the down conductor 4, and the lightning protection strip 1 and the down conductor 4 are connected. The lightning protection strip 1 and the down conductor 4 can be installed and removed by rotating the crimping screw 34. The lightning protection strip 1 and the down conductor 4 are clamped and connected by the clamping cooperation of the crimping screw 34 and the fixed base 31. The lightning protection strip 1 and the down conductor 4 can be connected horizontally or pressed together vertically.

[0036] The fixing seat 31 is used to install the entire down conductor seat 3 onto the wall 9. It generally has multiple anchoring through holes 211, through which anchoring bolts pass to anchor the fixing seat 31 to the top wall 9. The limiting rod 32 is used not only to install the threaded seat 33 but also to provide outward support, limiting the lightning protection strip 1 at corners and ensuring that the lightning protection strip 1 is supported upwards by the wall. One or multiple limiting rods 32 can be provided. Preferably, multiple limiting rods 32 are provided, evenly distributed along the circumference of the crimping screw 34, with adjacent limiting rods 32 spaced apart. The upper ends of the lightning protection strip 1 and the down conductor 4 are located between two adjacent limiting rods 32. This horizontal radial limitation of the lightning protection strip 1 and the down conductor 4 improves the connection stability.

[0037] The threaded seat 33 is used for installing the crimping screw 34, which is used to crimp the lightning protection strip 1 and the down conductor 4 onto the down conductor seat 3. As a further preferred embodiment, the upper end of the crimping screw 34 is provided with an auxiliary lightning rod 341 integrally formed therewith. This allows the down conductor seat 3 to also function as a lightning arrester, improving the reliability of the entire lightning protection device and further enhancing the lightning protection effect of the building. Therefore, the lightning protection device for buildings of this utility model can use a down conductor seat 3 with an auxiliary lightning rod 341 structure to replace the aforementioned lightning arrester 2.

[0038] A lightning arrester for use in any of the aforementioned building lightning protection devices includes a mounting base 21, a lightning rod 22 vertically disposed on the top surface of the mounting base 21, a fastening screw 23 vertically disposed on the top surface of the mounting base 21, a fastening nut 24 threadedly connected to the fastening screw 23, and a clamping plate 25 located between the fastening nut 24 and the mounting base 21. The clamping plate 25 has a guide hole 251, through which the fastening screw 23 passes with a clearance fit. When using this lightning arrester structure, the mounting base 21 is generally anchored to the top of the building by bolts. The fastening nut 24 is adjusted so that the gap between the mounting base 21 and the clamping plate 25 allows the lightning protection strip 1 to pass through. Then, the fastening nut 24 is adjusted downwards to press against the clamping plate 25. The clamping plate 25 and the mounting base 21 clamp the lightning protection strip 1, improving the connection reliability of the entire lightning arrester and the lightning protection strip 1. It is generally recommended to place the lightning arrester 1 between the lightning rod 22 and the fastening screw 23 so that the lightning rod 22 and the fastening screw 23 cooperate with each other to prevent the lightning protection strip 1 from coming off along its horizontal radial direction.

[0039] Preferably, the mounting base 21 is further provided with a limiting plate 213, which is located between the lightning rod 22 and the fastening screw 23. The limiting plate 213 is arranged inclined upward from the side away from the lightning rod 22 to the side closer to the lightning rod 22. The clamping plate 25 is provided with inclined pressure plates 252 on both the side wall near the lightning rod 22 and the side wall away from the lightning rod 22. The inclined pressure plates 252 are arranged inclined upward from the end away from the guide hole 251 to the end closer to the guide hole 251. The inclined pressure plates 252 and the limiting plate 213 are staggered in the horizontal and vertical directions determined by the horizontal direction from the lightning rod 22 to the fastening screw 23. In use, the limiting plate 213 and the fastening stud 23 cooperate to position the lightning protection strip 1 between the limiting plate 213 and the fastening stud 23. The clamping plate 25 and the fastening stud 23 cooperate to position the lightning protection strip 1 between the clamping plate 25 and the fastening stud 23, further realizing the horizontal radial limitation of the lightning protection strip 1 and improving its installation reliability with the entire lightning arrester.

[0040] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A lightning protection device for buildings, characterized in that, It includes a lightning protection strip (1), a lightning rod (2), a down conductor base (3), and a down conductor (4) installed on the top wall (9) of the building; the lightning protection strip (1) is arranged along the length of the top wall (9) projected onto the horizontal plane; multiple lightning rods (2) and down conductor bases (3) are provided and distributed along the length of the lightning protection strip (1), and multiple lightning rods (2) and down conductor bases (3) are connected in series through the same lightning protection strip (1); the down conductor base (3) is located at the corner of the top wall (9) of the building; The lightning arrester (2) includes a mounting base (21) fixedly mounted on the top wall (9), a lightning rod (22) vertically mounted on the top surface of the mounting base (21), a fastening screw (23) vertically mounted on the top surface of the mounting base (21), a fastening nut (24) threadedly connected to the fastening screw (23), and a clamping plate (25) located between the fastening nut (24) and the mounting base (21); the clamping plate (25) is provided with a guide hole (251), the fastening screw (23) passes through the guide hole (251) and the two are in clearance fit; the fastening nut (24) abuts against the clamping plate (25) so that the mounting base (21) and the clamping plate (25) cooperate to clamp the lightning protection strip (1); the lightning protection strip (1) is located between the fastening screw (23) and the lightning rod (22); The lightning protection strip (1) and the down conductor (4) are connected through the down conductor base (3), and the lower end of the down conductor (4) is grounded.

2. The building lightning protection device according to claim 1, characterized in that, The lightning protection strip (1) and the down conductor (4) are both copper stranded wires, and the lightning arrester (2) and the down conductor base (3) are both made of copper.

3. The building lightning protection device according to claim 1, characterized in that, The clamping plate (25) is provided with inclined pressure plates (252) on both sides of the lightning protection strip (1). The inclined pressure plates (252) are arranged inclined upward from the end away from the guide through hole (251) to the end close to the guide through hole (251).

4. The building lightning protection device according to claim 3, characterized in that, The mounting base (21) is also provided with a limiting plate (213), which is located between the lightning rod (22) and the fastening screw (23). The limiting plate (213) is arranged inclined upward from the side away from the lightning rod (22) to the side closer to the lightning rod (22).

5. The building lightning protection device according to any one of claims 1-4, characterized in that, The down conductor seat (3) includes a fixed seat (31) fixedly mounted on the top wall (9), a limiting rod (32) vertically mounted on the top surface of the fixed seat (31), and a threaded seat (33) fixed on the upper end of the limiting rod (32). The threaded seat (33) is provided with a threaded hole (331) parallel to the limiting rod (32). The limiting rod (32) is located on the side of the threaded hole (331) near the inner corner line of the top wall (9) and inside the lightning protection strip (1). A crimping screw (34) is threaded into the threaded hole (331). The crimping screw (34) and the fixed seat (31) cooperate to clamp the lightning protection strip (1) and the down conductor (4).

6. The building lightning protection device according to claim 5, characterized in that, Both the mounting base (21) and the fixing base (31) are provided with multiple anchoring through holes (211). Anchoring bolts pass through the anchoring through holes (211) to anchor the mounting base (21) and the fixing base (31) to the top wall (9). The top of the mounting base (21) is provided with a connecting screw (212). The lower end of the lightning rod (22) is coaxially connected with an adapter nut (221). The adapter nut (221) is sleeved on the outside of the connecting screw (212) and threadedly connected to it.

7. The building lightning protection device according to claim 5, characterized in that, The limiting rod (32) is provided in multiple parts, and the multiple limiting rods (32) are evenly distributed along the circumference of the crimping screw (34), with two adjacent limiting rods (32) arranged at intervals; the upper ends of the lightning protection strip (1) and the down conductor (4) are both located between two adjacent limiting rods (32).

8. The building lightning protection device according to claim 7, characterized in that, The upper end of the crimping screw (34) is provided with an auxiliary lightning rod (341) integrally formed therewith.

9. A lightning arrester for use in a building lightning protection device as described in any one of claims 1-8, characterized in that, It includes a mounting base (21), a lightning rod (22) vertically disposed on the top surface of the mounting base (21), a fastening screw (23) vertically disposed on the top surface of the mounting base (21), a fastening nut (24) threadedly connected to the fastening screw (23), and a clamping plate (25) located between the fastening nut (24) and the mounting base (21); the clamping plate (25) is provided with a guide through hole (251), the fastening screw (23) passes through the guide through hole (251) and the two are clearance-fitted.

10. The lightning arrester on the building lightning protection device according to claim 9, characterized in that, The clamping plate (25) is provided with inclined pressure plates (252) on both the side wall near the lightning rod (22) and the side wall away from the lightning rod (22). The inclined pressure plates (252) are arranged inclined upward from the end away from the guide through hole (251) to the end near the guide through hole (251). The mounting base (21) is also provided with a limiting plate (213), which is located between the lightning rod (22) and the fastening screw (23). The limiting plate (213) is arranged inclined upward from the side away from the lightning rod (22) to the side closer to the lightning rod (22).

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