Lightning protection down conductor connection structure and construction method in prefabricated buildings

Abstract

The present invention relates to the technical field of prefabricated building construction, and specifically discloses a lightning protection down conductor connection structure in a prefabricated building and a construction method thereof, comprising a first splint, a threaded rod fixedly provided on the first splint, a nut threadedly installed on the threaded rod, a second splint slidably installed on the threaded rod, a fixed card slot provided on the first splint, a movable card slot provided on the second splint to match the fixed card slot, a rubber material bellows provided in the fixed card slot, a connector installed between the bellows and the fixed card slot, a metal material blocking plate fixedly provided at both ends of the bellows, a rubber material elastic member provided between the two blocking plates, a cavity provided in the elastic member, and a conductive liquid filled in the bellows. The present invention cooperates with the bellows, the elastic member, the conductive liquid and the blocking plate, so that when the round steel down conductor vibrates, the blocking plate is tightly fitted with the end face of the corresponding round steel down conductor, so that the current transmission between the two adjacent round steel down conductors is not affected, the probability of lightning leakage is reduced, and safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated building construction, and specifically discloses a lightning protection down conductor connection structure in a prefabricated building and a construction method thereof. Background Art

[0002] With the rapid advancement of building industrialization, prefabricated buildings are gaining widespread application in engineering construction due to their significant advantages, including efficient construction, controlled quality, and environmental friendliness. As a crucial component of a building's lightning protection system, the lightning downconductor plays a crucial role in safely directing lightning current captured by the lightning receptors to the grounding device. In prefabricated buildings, due to the modular assembly of prefabricated components, the reliability and durability of the downconductor connection nodes directly determine the effectiveness of the entire lightning protection system.

[0003] In the highly corrosive coastal environment, the connection method for lightning protection down conductors in prefabricated buildings mostly adopts the form of mechanical clamps. Long-term monitoring data shows that the clamp connection is subject to the combined effects of wind vibration loads, salt spray corrosion and temperature difference stress, and its tightening force shows a clear annual attenuation trend. Especially during the passage of typhoons, the high-frequency vibration of the structure will cause micro-wear of the connection interface, resulting in a sharp increase in contact resistance, posing a serious safety hazard of lightning discharge. Summary of the Invention

[0004] In view of the above deficiencies in the prior art, the present invention provides a lightning protection down conductor connection structure in an assembled building and a construction method thereof, so as to solve the problem that in the prior art, mechanical clamps are used to connect the lightning protection down conductors. The clamp connection is subjected to the combined effects of wind vibration load, salt spray corrosion and temperature difference stress, and its fastening force shows an obvious annual attenuation trend. Especially during the passage of typhoons, the high-frequency vibration of the structure will cause micro-wear of the connection interface, resulting in a sharp increase in contact resistance, and there is a serious safety hazard of lightning discharge.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] The lightning protection down conductor connection structure in the prefabricated building comprises a first plywood, a threaded rod is fixedly installed horizontally on the side wall of the first plywood, a nut is threadedly installed on the threaded rod, a second plywood is slidably installed on the threaded rod, a fixed card slot is provided on the side wall of the first plywood, and a dynamic card slot cooperating with the fixed card slot is provided on the second plywood, a rubber bellows is provided in the fixed card slot, a connecting piece is jointly installed between the bellows and the side wall of the fixed card slot, a metal blocking plate is fixedly installed at both ends of the bellows, an elastic piece of rubber is provided between the two blocking plates, a cavity is provided in the elastic piece, and a conductive liquid is filled in the bellows;

[0007] A sealing ring is fixedly mounted on the top wall of the first clamping plate. The sealing ring is annular. The first clamping plate is provided with an anti-wear mechanism for reducing the wear of the sealing ring. The second clamping plate is provided with a fixing mechanism for fixing the sealing ring.

[0008] Furthermore, the anti-wear mechanism includes a cavity opened in the sealing ring, an air hole communicating with the cavity is opened on the inner side wall of the sealing ring, and an air supply mechanism for supplying air to the cavity is provided on the bellows.

[0009] Furthermore, the air supply mechanism includes an elastic airbag arranged in the cavity, the elastic airbag is made of elastic material, and the elastic coefficient of the elastic airbag is smaller than the elastic coefficient of the elastic member;

[0010] The input end and output end of the elastic airbag are respectively equipped with an air inlet valve and an exhaust valve;

[0011] An intake pipe and an exhaust pipe are fixedly embedded on the first splint in sequence, the bottom end of the intake pipe is located on the bottom wall surface of the first splint, the other end of the intake pipe is connected to the intake valve, the top end of the exhaust pipe is located on the top wall surface of the first splint, and the other end of the exhaust pipe is connected to the exhaust valve.

[0012] Furthermore, a transverse tube is fixedly mounted on the side wall of the elastic airbag. The transverse tube is made of metal and passes through the side wall of the corrugated tube. The transverse tube is fixedly connected to the corrugated tube. The intake valve and the exhaust valve are located in the transverse tube.

[0013] Furthermore, ammonia gas is contained in the cavity.

[0014] Furthermore, a partition is fixedly installed in the transverse tube, the side wall of the partition is fixedly connected to the side wall of the elastic airbag, and the intake valve and the exhaust valve pass through the partition.

[0015] Furthermore, the fixing mechanism includes an inserting plate fixedly mounted on the bottom wall of the sealing ring, and a plug hole cooperating with the inserting plate is formed on the top wall of the second clamping plate.

[0016] Furthermore, the longitudinal section of the sealing ring in the vertical direction is a right truncated cone.

[0017] Furthermore, a filter is fixedly mounted on the bottom wall of the first clamping plate, and the filter covers the end surface of the intake pipe.

[0018] Furthermore, the construction method of the lightning protection down conductor connection structure in the prefabricated building includes the following steps:

[0019] S1. First, fix the first clamping plate on the wall. Then, insert the adjacent ends of two adjacent round steel down conductors into the fixed clamping slots. Make sure the bottom end of the upper round steel down conductor fits against the sealing plate at the top of the corrugated pipe, and the top end of the lower round steel down conductor fits against the sealing plate at the bottom of the corrugated pipe. The corrugated pipe and the elastic member are squeezed.

[0020] S2. The second clamping plate is fixedly mounted on the surface of the first clamping plate, and the movable slot cover is arranged on the surface of the round steel down conductor;

[0021] S3. Press the sealing ring to insert the plug into the socket;

[0022] S4. When the round steel down conductor vibrates, the heat generated by friction is transferred to the elastic member, the temperature of the gas in the cavity increases, and under the action of air pressure, the elastic airbag is squeezed;

[0023] S5. The elastic airbag is exhausted through the exhaust valve to supply air to the cavity. The gas in the cavity is discharged through the air hole. The gas discharged from the air hole passes through the gap between the round steel down conductor and the sealing ring and is discharged to the outside.

[0024] The beneficial effects of the present invention are:

[0025] 1. The present invention cooperates with the bellows, elastic parts, conductive liquid and blocking plate. When the round steel down conductor vibrates, the blocking plate can be tightly fitted with the end face of the corresponding round steel down conductor, preventing the blocking plate from sliding on the end face of the corresponding round steel down conductor. This ensures that the current transmission between two adjacent round steel down conductors is not affected, reduces the probability of lightning leakage, and improves safety.

[0026] 2. The present invention cooperates with the sealing ring, elastic airbag, elastic part and cavity. When the contact surfaces of the round steel down conductor and the first and second splints vibrate and rub against each other, the heat generated by the friction will be transferred to the sealing plate, conductive liquid and elastic part in sequence in the form of heat exchange, so that the gas in the cavity expands due to the heat, the elastic airbag is squeezed, and the gas in the elastic airbag flows into the cavity through the exhaust valve and the exhaust pipe. At this time, the air pressure in the cavity increases, and the cavity is exhausted to the outside through the air hole. The gas discharged from the air hole passes through the gap between the fixed card slot, the movable card slot and the round steel down conductor, so that impurities that fall into the gap can be blown out, reducing the friction force on the round steel down conductor during the vibration process, and protecting the anti-corrosion coating on the surface of the round steel down conductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 This is a schematic structural diagram of the first clamping plate, threaded rod, nut, bellows, connector, sealing ring and inserting plate of the present invention;

[0029] Figure 3 It is a schematic cross-sectional view of part of the structure of the present invention;

[0030] Figure 4 for Figure 3 A schematic diagram of the structure at point A in the middle;

[0031] Figure 5 for Figure 3 A magnified schematic diagram of the structure at B in the middle;

[0032] Figure 6 for Figure 3 A magnified schematic diagram of the structure at C in the middle;

[0033] Figure 7 This is a schematic structural diagram of the second clamping plate, sealing ring, plug plate and plug hole of the present invention.

[0034] In the figure: 1. first splint; 2. threaded rod; 3. nut; 4. second splint; 5. bellows; 6. connector; 7. blocking plate; 8. elastic member; 9. cavity; 10. sealing ring; 11. cavity; 12. air hole; 13. elastic airbag; 14. inlet valve; 15. exhaust valve; 16. suction pipe; 17. cross pipe; 18. partition; 19. plug-in plate; 20. plug-in hole; 21. filter. DETAILED DESCRIPTION

[0035] The present invention will be described and explained in detail below with reference to the accompanying drawings.

[0036] Example 1

[0037] like Figure 1-7 As shown, the lightning protection down conductor connection structure in the prefabricated building includes a first plywood 1, a threaded rod 2 is horizontally fixedly installed on the side wall of the first plywood 1, a nut 3 is threadedly installed on the threaded rod 2, and a second plywood 4 is slidably installed on the threaded rod 2, a fixed card slot is provided on the side wall of the first plywood 1, and a dynamic card slot cooperating with the fixed card slot is provided on the second plywood 4, a rubber bellows 5 is provided in the fixed card slot, a connecting piece 6 is installed between the bellows 5 and the side wall of the fixed card slot, a metal blocking plate 7 is fixedly installed at both ends of the bellows 5, an elastic piece 8 of rubber material is provided between the two blocking plates 7, a cavity 9 is provided in the elastic piece 8, and a conductive liquid is filled in the bellows 5;

[0038] The second clamping plate 4 is located between the nut 3 and the first clamping plate 1, and a through hole is provided on the second clamping plate 4. The second clamping plate 4 is movably mounted on the threaded rod 2 through the through hole, and the ratio of the outer diameter of the nut 3 to the diameter of the through hole is 1.5:1. Therefore, when the nut 3 moves along the threaded rod 2, it can drive the second clamping plate 4 to move along the threaded rod 2; the fixed card groove passes through the top wall and the bottom wall of the first clamping plate 1. When the second clamping plate 4 is in contact with the side wall of the first clamping plate 1, the space formed by the combination of the fixed card groove and the movable card groove is cylindrical and matches the round steel down conductor. The conductive liquid is a sodium chloride solution. Therefore, the conductive liquid in the bellows 5 and the sealing plate 7 are combined to form a conductor.

[0039] A sealing ring 10 is fixedly mounted on the top wall of the first splint 1 . The sealing ring 10 is annular. The first splint 1 is provided with an anti-wear mechanism for reducing the wear of the sealing ring 10 . The second splint 4 is provided with a fixing mechanism for fixing the sealing ring 10 .

[0040] Through the above-mentioned setting, first use expansion bolts to firmly install the first clamping plate 1 on the surface of the building structure, and then place the adjacent ends of the two adjacent round steel down conductors in the fixed card groove, and make the round steel down conductor above the first clamping plate 1 pass through the sealing ring 10, and make the bottom end of the upper round steel down conductor fit with the sealing plate 7 at the top of the corrugated pipe 5, and make the top end of the lower round steel down conductor fit with the sealing plate 7 at the bottom end of the corrugated pipe 5, and the corrugated pipe 5 is squeezed, and at the same time the elastic part 8 is squeezed and the cavity 9 is compressed, and the space occupied by the elastic part 8 inside the corrugated pipe 5 is reduced, so the conductive liquid still fills the internal space of the corrugated pipe 5.

[0041] Since the blocking plate 7 is a metal structure with good electrical conductivity, the bellows 5 and the blocking plate 7 cooperate to connect two adjacent round steel down conductors.

[0042] The tube perforation on the second plywood 4 is sleeved on the outer surface of the threaded rod 2, and then the nut 3 is screwed to make the nut 3 push the second plywood 4 closer to the first plywood 1 until the first plywood 1 and the second plywood 4 are tightly fitted together; during the movement of the second plywood 4, the movable groove gradually covers the surface of the round steel down conductor and the corrugated pipe 5, so that the two adjacent round steel down conductors can be fixed through the first plywood 1 and the second plywood 4; at this time, under the action of the fixing mechanism, the bottom wall of the sealing ring 10 can be fixed together with the second plywood 4, thereby effectively preventing external dust from entering the gap between the first plywood 1, the second plywood 4 and the round steel down conductor.

[0043] Since the squeezed elastic part 8 has a tendency to recover, when the typhoon weather causes the round steel down conductor to vibrate, under the action of the elastic part 8, the sealing plate 7 can always fit tightly with the end face of the round steel down conductor, and the corrugated tube 5 made of elastic material can swing in any direction. Therefore, when the round steel down conductor vibrates, the sealing plate 7 can always fit tightly with the end face of the corresponding round steel down conductor, and the sealing plate 7 is difficult to slide on the end face of the corresponding round steel down conductor, preventing the occurrence of wear-induced resistance increase between the sealing plate 7 and the round steel down conductor; and under the action of the sealing ring 10, it can prevent external impurities from diffusing into the surface of the gap between the sealing plate 7 and the end face of the corresponding round steel down conductor, thereby preventing the sealing plate 7 and the end face of the corresponding round steel down conductor from wearing.

[0044] Therefore, with the mutual cooperation of the bellows 5, the elastic member 8, the conductive liquid and the sealing plate 7, when the round steel down conductor vibrates, the current transmission between two adjacent round steel down conductors is not affected, which plays a role in reducing the probability of lightning leakage and improving safety.

[0045] like Figure 3-5 As shown, the anti-wear mechanism includes a cavity 11 opened in the sealing ring 10, an air hole 12 communicating with the cavity 11 is opened on the inner wall of the sealing ring 10, and an air supply mechanism for supplying air to the cavity 11 is provided on the bellows 5.

[0046] The air supply mechanism includes an elastic airbag 13 disposed in the cavity 9. The elastic airbag 13 is made of elastic material, and the elastic coefficient of the elastic airbag 13 is smaller than the elastic coefficient of the elastic member 8.

[0047] The input end and output end of the elastic airbag 13 are respectively equipped with an intake valve 14 and an exhaust valve 15;

[0048] An intake pipe 16 and an exhaust pipe are fixedly embedded on the first splint 1 in sequence. The bottom end of the intake pipe 16 is located on the bottom wall surface of the first splint 1, and the other end of the intake pipe 16 is connected to the intake valve 14. The top end of the exhaust pipe is located on the top wall surface of the first splint 1, and the other end of the exhaust pipe is connected to the exhaust valve 15.

[0049] A transverse tube 17 is fixedly mounted on the side wall of the elastic airbag 13 . The transverse tube 17 is made of metal and passes through the side wall of the bellows 5 . The transverse tube 17 is fixedly connected to the bellows 5 . The intake valve 14 and the exhaust valve 15 are located in the transverse tube 17 .

[0050] Through the above arrangement, when the contact surfaces of the round steel down conductor and the first clamping plate 1 and the second clamping plate 4 vibrate and rub against each other, the heat generated by the friction will be transferred to the sealing plate 7, the conductive liquid, and the elastic part 8 in sequence in the form of heat exchange, thereby causing the gas in the cavity 9 to expand due to the heat. Since the elastic coefficient of the elastic airbag 13 is smaller than the elastic coefficient of the elastic part 8, when the gas in the cavity 9 expands due to the heat, the elastic airbag 13 will be squeezed. At this time, the gas in the elastic airbag 13 flows into the cavity 11 through the exhaust valve 15 and the exhaust pipe. At this time, the air pressure in the cavity 11 increases, and the cavity 11 is exhausted outward through the air hole 12. The gas discharged from the air hole 12 passes through the gap between the inner wall of the sealing ring 10 and the round steel down conductor, thereby blowing out impurities that fall into the gap and preventing impurities from entering the gap between the dynamic card slot, the fixed card slot and the round steel down conductor, reducing the friction force on the round steel down conductor during the vibration process, reducing the wear degree of the round steel down conductor, and playing a role in protecting the anti-corrosion coating on the outer surface of the round steel down conductor.

[0051] Furthermore, under the action of the transverse tube 17 , when the cavity 9 is in a high pressure state, the intake pipe 16 and the exhaust pipe can be prevented from being squeezed and deformed by the air pressure, thereby ensuring that the elastic airbag 13 can be exhausted normally.

[0052] like Figure 3 As shown, the cavity 9 is filled with ammonia gas.

[0053] Since ammonia has a large thermal expansion coefficient, when the temperature of the elastic member 8 rises, the ammonia in the cavity 9 expands, further increasing the air pressure in the cavity 9 and improving the recovery tendency of the elastic member 8, that is, increasing the pressure of the elastic member 8 on the sealing plate 7, thereby ensuring that the sealing plate 7 can maintain contact with the end face of the round steel down conductor.

[0054] like Figure 5 As shown, a partition 18 is fixedly installed in the transverse tube 17 , the side wall of the partition 18 is fixedly connected to the side wall of the elastic airbag 13 , and the intake valve 14 and the exhaust valve 15 pass through the partition 18 .

[0055] Since the elastic airbag 13 is squeezed by the high-pressure ammonia gas in the cavity 9 , the partition 18 can prevent the deformed elastic airbag 13 from entering the transverse tube 17 , thereby ensuring that the elastic airbag 13 can continue to work.

[0056] like Figure 7 As shown, the fixing mechanism includes an inserting plate 19 fixedly mounted on the bottom wall of the sealing ring 10 , and a plug hole 20 that cooperates with the inserting plate 19 is formed on the top wall of the second clamping plate 4 .

[0057] When the first splint 1 and the second splint 4 are fixed together, the sealing ring 10 is pressed toward the bottom wall of the sealing ring 10, so that the plug plate 19 can be pushed to be engaged in the insertion hole 20. The plug plate 19 is fixed in the insertion hole 20 by the friction between the outer wall of the plug plate 19 and the inner wall of the insertion hole 20, which plays the role of fixing the sealing ring 10 and ensuring that the bottom wall of the sealing ring 10 can fit tightly with the second splint 4, preventing impurities from passing through the gap between the sealing ring 10 and the second splint 4.

[0058] like Figure 2-3 As shown, the longitudinal section of the sealing ring 10 in the vertical direction is a right truncated cone.

[0059] Therefore, the outer wall of the sealing ring 10 is a downwardly inclined slope, which can enable impurities falling on the surface of the sealing ring 10 to slide down along the outer wall of the sealing ring 10 in time, preventing impurities from entering the gap between the round steel down conductor and the sealing ring 10, thereby reducing the probability of wear of the outer surface coating of the round steel down conductor.

[0060] like Figure 6 As shown, a filter screen 21 is fixedly mounted on the bottom wall of the first clamping plate 1 , and the filter screen 21 covers the end surface of the intake pipe 16 .

[0061] When the elastic airbag 13 inhales air through the air intake pipe 16 , the filter 21 can filter impurities in the airflow, preventing impurities in the air from being inhaled into the elastic airbag 13 , thereby ensuring that clean air is discharged from the air hole 12 .

[0062] The construction method of the lightning protection down conductor connection structure in the prefabricated building comprises the following steps:

[0063] S1. First, fix the first clamping plate 1 on the wall, then insert the adjacent ends of two adjacent round steel down conductors into the fixed card slots, so that the bottom end of the upper round steel down conductor fits with the blocking plate 7 at the top of the corrugated pipe 5, and the top end of the lower round steel down conductor fits with the blocking plate 7 at the bottom end of the corrugated pipe 5, and the corrugated pipe 5 and the elastic member 8 are squeezed;

[0064] S2. The second clamping plate 4 is fixedly mounted on the surface of the first clamping plate 1, and the movable slot cover is arranged on the surface of the round steel down conductor;

[0065] S3, press the sealing ring 10 to insert the plug plate 19 into the plug hole 20;

[0066] S4. When the round steel down conductor vibrates, the heat generated by friction is transferred to the elastic member 8, the temperature of the gas in the cavity 9 increases, and under the action of air pressure, the elastic airbag 13 is squeezed;

[0067] S5, the elastic airbag 13 is exhausted through the exhaust valve 15 to supply air to the cavity 11, and the gas in the cavity 11 is discharged through the air hole 12. The gas discharged from the air hole 12 passes through the gap between the round steel down conductor and the sealing ring 10 and is discharged to the outside.

Claims

1. A lightning protection down conductor connection structure in an assembled building, comprising a first clamping plate (1), a threaded rod (2) being fixedly mounted horizontally on the side wall of the first clamping plate (1), a nut (3) being threadedly mounted on the threaded rod (2), and a second clamping plate (4) being slidably mounted on the threaded rod (2), characterized in that: A fixed card slot is provided on the side wall of the first clamping plate (1), and a movable card slot cooperating with the fixed card slot is provided on the second clamping plate (4), a rubber bellows (5) is provided in the fixed card slot, a connecting piece (6) is installed between the bellows (5) and the side wall of the fixed card slot, a metal sealing plate (7) is fixedly installed at both ends of the bellows (5), a rubber elastic piece (8) is provided between the two sealing plates (7), a cavity (9) is provided in the elastic piece (8), and a conductive liquid is filled in the bellows (5); A sealing ring (10) is fixedly mounted on the top wall of the first clamping plate (1), and the sealing ring (10) is annular. The first clamping plate (1) is provided with an anti-wear mechanism for reducing the degree of wear of the sealing ring (10), and the second clamping plate (4) is provided with a fixing mechanism for fixing the sealing ring (10); The anti-wear mechanism comprises a cavity (11) provided in the sealing ring (10), an air hole (12) communicating with the cavity (11) is provided on the inner wall of the sealing ring (10), and an air supply mechanism for supplying air to the cavity (11) is provided on the bellows (5); The air supply mechanism comprises an elastic airbag (13) arranged in the cavity (9), the elastic airbag (13) is made of elastic material, and the elastic coefficient of the elastic airbag (13) is smaller than the elastic coefficient of the elastic member (8); An air inlet valve (14) and an air exhaust valve (15) are installed at the input end and the output end of the elastic airbag (13), respectively; An intake pipe (16) and an exhaust pipe are fixedly embedded in the first clamping plate (1) in sequence. The bottom end of the intake pipe (16) is located on the bottom wall surface of the first clamping plate (1), and the other end of the intake pipe (16) is connected to the intake valve (14). The top end of the exhaust pipe is located on the top wall surface of the first clamping plate (1), and the other end of the exhaust pipe is connected to the exhaust valve (15).

2. The lightning protection down conductor connection structure in the prefabricated building according to claim 1, characterized in that: A transverse tube (17) is fixedly mounted on the side wall of the elastic airbag (13). The transverse tube (17) is made of metal. The transverse tube (17) penetrates the side wall of the bellows (5). The transverse tube (17) is fixedly connected to the bellows (5). The intake valve (14) and the exhaust valve (15) are located in the transverse tube (17).

3. The lightning protection down conductor connection structure in the prefabricated building according to claim 1, characterized in that: The cavity (9) is filled with ammonia gas.

4. The lightning protection down conductor connection structure in the prefabricated building according to claim 2, characterized in that: A partition (18) is fixedly installed in the transverse tube (17), a side wall of the partition (18) is fixedly connected to a side wall of the elastic airbag (13), and the intake valve (14) and the exhaust valve (15) pass through the partition (18).

5. The lightning protection down conductor connection structure in the prefabricated building according to claim 2, characterized in that: The fixing mechanism comprises an inserting plate (19) fixedly mounted on the bottom wall of the sealing ring (10), and a plug hole (20) cooperating with the inserting plate (19) is provided on the top wall of the second clamping plate (4).

6. The lightning protection down conductor connection structure in an assembled building according to claim 1, characterized in that: The longitudinal cross-section of the sealing ring (10) in the vertical direction is a right truncated cone.

7. The lightning protection down conductor connection structure in an assembled building according to claim 1, characterized in that: A filter screen (21) is fixedly mounted on the bottom wall of the first clamping plate (1), and the filter screen (21) covers the end surface of the air intake pipe (16).

8. A construction method using the lightning protection down conductor connection structure in an assembled building according to claim 5, characterized in that: The steps include: S1. First, fix the first clamping plate (1) on the wall, and then insert the adjacent ends of two adjacent round steel down conductors into the fixed card slots, so that the bottom end of the upper round steel down conductor fits with the sealing plate (7) at the top of the corrugated pipe (5), and the top end of the lower round steel down conductor fits with the sealing plate (7) at the bottom end of the corrugated pipe (5), and the corrugated pipe (5) and the elastic member (8) are squeezed; S2, fixing the second clamping plate (4) on the surface of the first clamping plate (1), and making the movable slot cover be arranged on the surface of the round steel down conductor; S3, pressing the sealing ring (10) to insert the plug plate (19) into the plug hole (20); S4. When the round steel down conductor vibrates, the heat generated by friction is transferred to the elastic member (8), the temperature of the gas in the cavity (9) increases, and under the action of the gas pressure, the elastic airbag (13) is squeezed; S5. The elastic airbag (13) is exhausted through the exhaust valve (15) to supply air to the cavity (11). The gas in the cavity (11) is discharged through the air hole (12). The gas discharged from the air hole (12) passes through the gap between the round steel down conductor and the sealing ring (10) and is discharged to the outside.

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