A lightning protection and grounding device for a seismic isolation bearing and its installation method

Abstract

The present application relates to a lightning protection grounding device for a seismic isolation bearing and an installation method thereof. The grounding device includes a grounding box, a steel plate, a connecting piece, and a wire. The grounding box is used to be preset in a pier. The steel plates are respectively arranged in the pier, and one end of the steel plate is connected to the lightning protection wire in the pier, and the other end of the steel plate extends into the grounding box. A box cover is detachably connected to one side of the grounding box away from the pier. The end of the wire passes through the box cover and is connected to one end of the steel plate located in the grounding box through the connecting piece. One end of the wire is connected to the steel plate in the upper pier, and the other end is connected to the steel plate in the lower pier. A buffer section is formed by winding the middle part of the wire. The installation method is as follows: first, the steel plate and the grounding box are embedded in the pier; then, the end of the wire passes through the box cover and is fixed to the end of the steel plate through the connecting piece; after completing the grounding connection between the upper pier and the lower pier, the installation of the grounding device can be completed. The present application has the effect of improving the grounding service life of the seismic isolation bearing.

Description

Technical Field

[0001] The present application relates to the technical field of lightning protection and grounding, and in particular to a seismic isolation bearing lightning protection and grounding device and an installation method thereof. Background Art

[0002] As a basic construction technology, seismic isolation technology mostly uses flexible rubber bearings. Flexible rubber bearings are set in the seismic isolation layer to separate the upper and lower buildings. After the building is affected by an earthquake, the upper and lower piers can be staggered, and the upper pier is in translation, which avoids the damage to the upper building after the earthquake. At present, great progress has been made in reducing the destructive power of earthquakes and disaster prevention and mitigation. Seismic isolation bearings are set between the upper and lower piers to avoid the energy input of the earthquake to the building. Since the seismic isolation bearing divides the grounding electrode in the building structure column into upper and lower parts, compared with buildings that do not use seismic isolation bearing technology, a grounding device needs to be installed separately to connect the grounding electrode. Therefore, compared with the grounding construction of traditional buildings, a grounding device that can be quickly installed and is simple to construct is urgently needed in building seismic isolation construction.

[0003] At present, the installation of seismic isolation bearing grounding is completed by pre-embedded steel plates in the upper and lower piers and welding galvanized round steel. This method is a rigid connection, which is easy to cause tearing and damage of the grounding welding point and breakage of the galvanized round steel in an earthquake. It is difficult to find the position of the pre-embedded steel plate after concrete pouring, and the welding quality when the galvanized round steel is connected to the steel plate affects the grounding conductivity. Summary of the invention

[0004] In order to increase the service life of the grounding of the seismic isolation bearing, the present application provides a seismic isolation bearing lightning protection grounding device and an installation method thereof.

[0005] In the first aspect, the present application provides a seismic isolation support lightning protection grounding device, which adopts the following technical solution:

[0006] A seismic isolation bearing lightning protection grounding device comprises a grounding box, a steel plate, a connector and a conductor, wherein the grounding box is used to be preset in a pier, the steel plates are respectively arranged in the piers, and one end of the steel plate is connected to the lightning protection wire in the pier, and the other end of the steel plate extends into the grounding box, and a box cover is detachably connected to the side of the grounding box away from the pier, the end of the conductor passes through the box cover and is connected to one end of the steel plate located in the grounding box through the connector, one end of the conductor is connected to the steel plate located in the upper pier, and the other end is connected to the steel plate located in the lower pier, and the middle part of the conductor is wound to form a buffer section.

[0007] By adopting the above technical scheme, when the seismic isolation bearing is grounded, a grounding box is set up so that when the connection between the wires connecting the upper and lower piers and the steel plate is located in the grounding box, the grounding is protected by the embedded protection of the grounding box to ensure that the grounding is not damaged by external forces, and its flatness and wall rate are guaranteed. The grounding box is closed by setting a box cover, which not only facilitates the installation and maintenance of the grounding, but also after the grounding box is closed, the connection inside the grounding box is sealed and protected to prevent rainwater from entering the connection and corroding the connection, thereby playing a good protective role and thus improving the service life of the wiring device; by winding a buffer section around the middle of the wire, when an earthquake occurs and the upper and lower piers are relatively displaced, the buffer section in the middle of the wire can play a good buffering effect to prevent the wire from being pulled and broken, thereby further improving the service life of the wiring device.

[0008] Optionally, a through hole is provided on the box cover, a hollow elbow is provided in the through hole, and the upper and lower hollow elbows are arranged opposite to each other at one end outside the grounding box. The wire passes through the hollow elbow and enters the grounding box. A locking piece is provided at one end of the hollow elbow outside the grounding box, and the locking piece is used to fix the wire.

[0009] By adopting the above technical solution, a hollow elbow is arranged on the box cover, and the wire enters the grounding box through the hollow elbow. The hollow elbow protects the wire entering the grounding box, so as to avoid the wear of the wire at the connection of the box cover, which may cause the wire to break and affect the service life; and after the wire is locked and fixed by the locking piece, not only the connection between the wire and the hollow elbow can be sealed and fixed, but also after the wire is fixed, it can avoid pulling the connection between the wire and the steel plate when the upper and lower piers are displaced during an earthquake, thereby protecting the connection between the wire and the steel plate from damage by external forces.

[0010] Optionally, the locking member includes a cap and a rubber tube, one end of the rubber tube is provided with an annular groove along the circumferential direction, the middle part of the cap is provided with a fixing hole, the rubber tube is clamped in the fixing hole through the annular groove, the end of the rubber tube located in the cap is truncated cone-shaped, and the outer diameter gradually increases from the end far away from the annular groove to the end close to the annular groove, the inner diameter of the hollow elbow is smaller than the maximum outer diameter of the truncated cone end of the rubber tube and larger than the minimum outer diameter of the truncated cone end of the rubber tube, and the cap is threadedly connected to the end of the hollow elbow.

[0011] By adopting the above technical solution, during the grounding installation process, a cap and a rubber tube are set, and after the wire is passed through the rubber tube and inserted into the hollow elbow and the connection is completed, the cap is threadedly connected to the hollow elbow. During the threaded connection process, since the inner diameter of the hollow elbow is smaller than the maximum value of the outer diameter of the truncated cone end of the rubber tube and larger than the minimum value of the outer diameter of the truncated cone end of the rubber tube, when the cap thread is tightened, the end of the hollow elbow squeezes the side wall of the rubber tube, and then the wire is squeezed and fixed in the rubber tube, thereby achieving a fixing effect on the wire and achieving a good sealing effect.

[0012] Optionally, a chamfered surface is provided around the inner side of the end of the hollow elbow connecting with the cap.

[0013] By adopting the above technical solution, a chamfered surface is provided on the inner side of the end of the hollow elbow and the connecting end of the cap. When fixing the guide, by tightening the cap and the hollow elbow thread, the feeding of the hollow elbow end on the side wall of the rubber tube can be facilitated, thereby avoiding damage to the side wall of the rubber tube caused by the hollow elbow end during installation, thereby affecting the fixing effect of the wire.

[0014] Optionally, a side wall of one end of the rubber tube located inside the cap is provided with a contraction seam along the axial direction, and a plurality of the contraction seams are distributed along the circumference of the rubber tube.

[0015] By adopting the above technical solution and setting a shrinkage seam, when the guide is fixed and the cap is tightened, when the end of the hollow elbow squeezes the side wall of the rubber tube, the shrinkage seam can more easily fix the wire, making installation more convenient.

[0016] Optionally, the connecting member includes a wire nose, a bolt and a nut, the wire nose is arranged at the end of the wire, a connecting hole is arranged at the end of the steel plate, and the bolt passes through the wire nose and the connecting hole in sequence and is fixed by the nut.

[0017] By adopting the above technical solution, when the grounding device is installed, the wire nose is connected to the conductor to improve the connection stability between the conductor and the steel plate. The wire nose is fixed in the connection hole of the steel plate by bolts and nuts, which facilitates the maintenance of the grounding device and replacement of the conductor.

[0018] Optionally, the connecting member further includes a spring washer and a flat washer, the spring washer is arranged between the wire nose and the bolt cap, and the flat washer is arranged between the steel plate and the nut.

[0019] By adopting the above technical solution, by arranging spring washers and flat washers, not only the stability of the connecting piece connecting the wire and the steel plate can be improved; and because the bolt and nut may be stripped when they are matched during natural disasters such as earthquakes, the spring washers can be arranged to achieve a good buffering effect, thereby improving the stability of the bolt and nut fixation, thereby improving the stability of the grounding device.

[0020] Optionally, a plurality of connection blocks are provided along the circumference of the connection between the box cover and the grounding box, the connection blocks are fixed by fixing bolts, and a sealing gasket is provided on the connection surface between the box cover and the grounding box.

[0021] By adopting the above technical solution, by setting the connection blocks and fixing the surrounding sides with fixing bolts, when the grounding device is repaired, since the wire passes through the middle of the box cover, the box cover and the grounding box are connected and fixed by multiple groups of connection blocks set on the surrounding sides, the box cover can be easily disassembled, thereby facilitating maintenance; and by setting the sealing gasket, the sealing between the box cover and the grounding box is further improved, thereby protecting the connection structure in the grounding box, preventing rainwater from entering the grounding box and causing erosion and damage, thereby improving the service life of the grounding device.

[0022] In a second aspect, the present application provides a method for installing a seismic isolation bearing lightning protection grounding device, which adopts the following technical solution:

[0023] A method for installing a seismic isolation bearing lightning protection grounding device comprises the following steps:

[0024] S1: Pre-embed the steel plate and grounding box in the pier;

[0025] S2: Wind the middle part of the wire to bend it to form a buffer section, and then pass the end of the wire through the box cover and fix it to the end of the steel plate through a connector;

[0026] S3: Then fix the box cover on the grounding box, and fix the wire and the box cover;

[0027] S4: Repeat the above steps to complete the grounding connection between the upper pier and the lower pier to complete the installation of the grounding device.

[0028] By adopting the above technical solution, by pre-setting the grounding box and the steel plate, it is convenient to find their positions after concrete pouring during installation, and the installation method is simple and easy to operate, which can effectively improve the installation and maintenance efficiency.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. By setting up a grounding device including a grounding box, a steel plate, a connector and a wire, the grounding is ensured not to be damaged by external forces, and its flatness and wall-out rate are ensured. By setting up a box cover to seal the grounding box, it is not only convenient for the installation and maintenance of the grounding, but also the buffer section in the middle of the wire can play a good buffering effect, avoiding the wire from being pulled and broken, and further improving the service life of the wiring device;

[0031] 2. By setting a hollow elbow and a locking piece, the hollow elbow protects the wire entering the grounding box to prevent the wire from being worn by the connection of the box cover, causing the wire to break and affecting the service life. After the wire is fixed by the locking piece, not only can the connection between the wire and the hollow elbow be sealed and fixed, but also the connection between the wire and the steel plate can be prevented from being pulled and damaged when the upper and lower piers are displaced during an earthquake;

[0032] 3. Installation: First, the grounding box and the steel plate are pre-buried, which makes it easy to find their positions after concrete pouring. The installation method is simple and easy to operate, which can effectively improve the installation and maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a seismic isolation bearing lightning protection grounding device according to an embodiment of the present application.

[0034] Figure 2 It is a three-dimensional cross-sectional view of a seismic isolation bearing lightning protection grounding device according to an embodiment of the present application.

[0035] Figure 3 yes Figure 2 Enlarged schematic diagram of part A.

[0036] Figure 4 It is a schematic diagram of the structure in which the middle part of the conductor is wound to form a buffer section in an embodiment of the present application.

[0037] Figure 5 It is a schematic diagram of the structure of the locking member in the embodiment of the present application.

[0038] Explanation of the reference numerals: 1. grounding box; 11. box cover; 111. perforation; 12. hollow elbow; 121. chamfered surface; 13. locking piece; 131. cover cap; 132. rubber tube; 133. ring groove; 134. fixing hole; 135. shrinkage joint; 14. connecting block; 2. steel plate; 21. connecting hole; 3. connecting piece; 31. wire nose; 32. bolt; 33. nut; 34. spring washer; 35. flat washer; 4. conductor; 41. buffer section. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-5 This application is described in further detail.

[0040] The present application embodiment discloses a seismic isolation support lightning protection grounding device. Figure 1 , Figure 2 and Figure 3 The seismic isolation bearing lightning protection grounding device includes a grounding box 1, a steel plate 2, a connector 3 and a wire 4. The grounding box 1 is used to be preset in the pier. Each pier is pre-buried with a grounding box 1 diagonally. The grounding box 1 is a JDG steel wire box; the steel plates 2 are respectively pre-buried in the piers. The steel plates 2 are 30x3cm galvanized flat steels, and one end of the steel plate 2 is welded to the lightning protection wire in the pier, and the other end of the steel plate 2 extends into the grounding box 1. One end of the wire 4 is connected to the steel plate 2 located in the upper pier, and the other end is connected to the steel plate 2 located in the lower pier. The wire 4 is 25mm 2 The copper core soft wire, the middle part of the conductor 4 is wound to form a buffer section 41, and the winding method of the buffer section 41 in the middle of the conductor 4 is as follows Figure 4 Any winding method among a, b, and c.

[0041] Reference Figure 2 and Figure 3 The grounding box 1 is detachably connected to a box cover 11 on one side away from the pier. A plurality of groups of connecting blocks 14 are integrally connected to the connection between the box cover 11 and the grounding box 1 along the circumferential side. In this embodiment, there are four groups, and they are evenly distributed along the axial direction of the box cover 11. The connecting blocks 14 are fixed by fixing bolts 32. When the box cover 11 and the grounding box 1 are connected and fixed by the plurality of groups of connecting blocks 14 arranged on the circumferential side, the box cover 11 can be conveniently disassembled, thereby facilitating maintenance; a sealing gasket is provided on the connecting surface between the box cover 11 and the grounding box 1 to further improve the sealing between the box cover 11 and the grounding box 1, thereby protecting the connecting structure in the grounding box 1 and preventing rainwater from entering the grounding box 1 and causing erosion and damage. The end of the wire 4 passes through the box cover 11 and is connected to one end of the steel plate 2 located in the grounding box 1 through the connector 3. A through hole 111 is opened on the box cover 11. A hollow elbow 12 is fixed in the through hole 111 through a lock nut. The hollow elbow 12 is a 90° right-angle elbow. The upper and lower hollow elbows 12 are arranged opposite to each other at one end outside the grounding box 1. The guide passes through the hollow elbow 12 and enters the grounding box 1. The hollow elbow 12 protects the wire 4 entering the grounding box 1 to prevent the wire 4 from being worn at the connection of the box cover 11, causing the wire 4 to break, which affects the service life.

[0042] Reference Figure 3 and Figure 5The end of the hollow elbow 12 located outside the grounding box 1 is provided with a locking piece 13, and the locking piece 13 is used to fix the wire 4. The locking piece 13 includes a cap 131 and a rubber tube 132. An annular groove 133 is opened at one end of the rubber tube 132 along the circumferential direction, and a fixing hole 134 is opened in the middle of the cap 131. The rubber tube 132 is clamped in the fixing hole 134 through the annular groove 133. The end of the rubber tube 132 located in the cap 131 is truncated, and the outer diameter gradually increases from the end away from the annular groove 133 to the end close to the annular groove 133. The inner diameter of the hollow elbow 12 is smaller than the maximum outer diameter of the truncated cone end of the rubber tube 132 and larger than the maximum outer diameter of the truncated cone end of the rubber tube 132. The outer diameter of the end is the minimum value, and the cap 131 is threadedly connected with the end of the hollow elbow 12; after the wire 4 passes through the rubber tube 132 and into the hollow elbow 12, it is threadedly connected with the hollow elbow 12 through the cap 131. When the cap 131 is screwed, the end of the hollow elbow 12 squeezes the side wall of the rubber tube 132, and then the wire 4 is squeezed and fixed in the rubber tube 132 to achieve the fixation of the wire 4; a chamfered surface 121 is provided around the inner side of the end of the connection end of the hollow elbow 12 and the cap 131 to facilitate the feeding of the end of the hollow elbow 12 on the side wall of the rubber tube 132 and avoid the end of the hollow elbow 12 from damaging the side wall of the rubber tube 132. A contraction seam 135 is opened axially on the side wall of one end of the rubber tube 132 located in the cap 131, and there are multiple contraction seams 135 distributed circumferentially along the rubber tube 132, which is more convenient for fixing the wire 4 and makes installation more convenient.

[0043] Reference Figure 2 and Figure 3 The connector 3 includes a wire nose 31, a bolt 32 and a nut 33. The wire nose 31 is fixed to the end of the wire 4. The end of the steel plate 2 is provided with a connection hole 21. The bolt 32 passes through the wire nose 31 and the connection hole 21 in sequence and is fixed by the nut 33. The wire nose 31 is fixed in the connection hole 21 of the steel plate 2 by the bolt 32 and the nut 33, which facilitates the maintenance of the grounding device and the replacement of the wire 4. The connector 3 also includes a spring washer 34 and a flat washer 35. The spring washer 34 is located between the wire nose 31 and the bolt cap of the bolt 32, and the flat washer 35 is located between the steel plate 2 and the nut 33, which can improve the stability of the connector 3 connecting the wire 4 and the steel plate 2, and because the stability of the bolt 32 and the nut 33 is improved during natural disasters such as earthquakes, the stability of the grounding device is improved.

[0044] The implementation principle of a seismic isolation bearing lightning protection grounding device in an embodiment of the present application is as follows: when the seismic isolation bearing is grounded, the wire 4 connecting the upper and lower piers is connected to the steel plate 2 through the connecting piece 3 and is located in the grounding box 1, ensuring that the grounding is not damaged by external forces, and the grounding box 1 is closed by the box cover 11, which not only facilitates the installation and maintenance of the grounding, but also after the grounding box 1 is closed, the connection inside the grounding box 1 is sealed and protected. During the installation process, the wire 4 enters the grounding box 1 through the hollow elbow 12, and the wire 4 is locked and fixed by the locking piece 13, which can avoid pulling the connection between the wire 4 and the steel plate 2 when the upper and lower piers are displaced during an earthquake, thereby protecting the connection between the wire 4 and the steel plate 2 from external force damage, thereby effectively improving the service life of the grounding device.

[0045] The present application also discloses a method for installing a seismic isolation support lightning protection grounding device, referring to Figure 1 and Figure 4 , using the above-mentioned isolation support lightning protection grounding device, including the following steps:

[0046] S1: pre-embed the steel plate 2 and the grounding box 1 in the pier; the outermost side and top surface of the grounding box 1 are 15-20 cm away from the edge and top surface of the lower pier forming surface, 15 cm in this embodiment, and the outermost side and bottom surface of the grounding box 1 are also 15-20 cm away from the edge and bottom surface of the upper pier forming surface, 15 cm in this embodiment;

[0047] S2: Wind the middle part of the wire 4 to bend it to form a buffer section 41, and then pass the end of the wire 4 through the hollow elbow 12 into the grounding box 1 and fix it to the end of the steel plate 2 through the connector 3;

[0048] S3: Then, the box cover 11 is fixed on the grounding box 1, and the wire 4 is fixed to the box cover 11 by the locking member 13;

[0049] S4: Repeat the above steps to complete the grounding connection between the upper pier and the lower pier to complete the installation of the grounding device.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A lightning protection grounding device for a seismic isolation bearing, characterized in that: It includes a grounding box (1), a steel plate (2), a connecting piece (3) and a wire (4). The grounding box (1) is used to be preset in the pier. The steel plates (2) are respectively arranged in the pier, and one end of the steel plate (2) is connected to the lightning protection wire in the pier. The other end of the steel plate (2) extends into the grounding box (1). A box cover (11) is detachably connected to one side of the grounding box (1) away from the pier. The end of the wire (4) passes through the box cover (11) and is connected to one end of the steel plate (2) located in the grounding box (1) through the connecting piece (3). One end of the wire (4) is connected to the steel plate (2) in the upper pier, and the other end is connected to the steel plate (2) in the lower pier. A buffer section (41) is formed by winding the middle part of the wire (4); A perforation (111) is provided on the box cover (11), and a hollow elbow (12) is provided in the perforation (111). The ends of the upper and lower hollow elbows (12) located outside the grounding box (1) are arranged opposite to each other. The wire (4) passes through the hollow elbow (12) and enters the grounding box (1). A locking piece (13) is provided at one end of the hollow elbow (12) located outside the grounding box (1), and the locking piece (13) is used to fix the wire (4); The locking piece (13) includes a cap (131) and a rubber cylinder (132). One end of the rubber cylinder (132) is provided with an annular groove (133) along the circumferential direction. A fixing hole (134) is provided in the middle of the cap (131). The rubber cylinder (132) is clamped in the fixing hole (134) through the annular groove (133). One end of the rubber cylinder (132) located inside the cap (131) is frustum-shaped, and the outer diameter gradually increases from the end far away from the annular groove (133) to the end close to the annular groove (133). The inner diameter of the hollow elbow (12) is smaller than the maximum outer diameter of the frustum-shaped end of the rubber cylinder (132) and larger than the minimum outer diameter of the frustum-shaped end of the rubber cylinder (132). The cap (131) is threadedly connected to the end of the hollow elbow (12).

2. A lightning protection grounding device for a seismic isolation bearing according to claim 1, characterized in that: A chamfered surface (121) is provided on the inner side of the end of the connection between the hollow elbow (12) and the cap (131).

3. A lightning protection grounding device for a seismic isolation bearing according to claim 1, characterized in that: A shrinkage joint (135) is axially provided on the side wall of one end of the rubber cylinder (132) located inside the cap (131), and a plurality of shrinkage joints (135) are distributed along the circumferential direction of the rubber cylinder (132).

4. A lightning protection grounding device for a seismic isolation bearing according to claim 1, characterized in that: The connecting piece (3) includes a wire nose (31), a bolt (32) and a nut (33). The wire nose (31) is arranged at the end of the wire (4). A connecting hole (21) is provided at the end of the steel plate (2). The bolt (32) passes through the wire nose (31) and the connecting hole (21) in sequence and is fixed by the nut (33).

5. An anti-seismic bearing lightning protection grounding device according to claim 4, characterized in that: The connecting member (3) further includes a spring washer (34) and a flat washer (35). The spring washer (34) is arranged between the wire nose (31) and the bolt head of the bolt (32), and the flat washer (35) is arranged between the steel plate (2) and the nut (33).

6. An anti-seismic bearing lightning protection grounding device according to claim 1, characterized in that: A plurality of groups of connecting blocks (14) are arranged along the circumferential side at the connection between the box cover (11) and the grounding box (1). The connecting blocks (14) are fixed by fixing bolts (32), and a sealing gasket is arranged on the connection surface between the box cover (11) and the grounding box (1).

7. An installation method of an anti-seismic bearing lightning protection grounding device, characterized in that: An anti-seismic bearing lightning protection grounding device according to any one of claims 1-6 is adopted, and the method includes the following steps: S1: Embed the steel plate (2) and the grounding box (1) in the pier; S2: Wind the middle part of the wire (4) so that it bends to form a buffer section (41), and then pass the end of the wire (4) through the box cover (11) and fix it to the end of the steel plate (2) through the connecting member (3); S3: Then fix the box cover (11) on the grounding box (1), and fix the wire (4) to the box cover (11); S4: Repeat the above steps to complete the grounding connection between the upper pier and the lower pier, and the installation of the grounding device can be completed.

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