CN109672137B - A fire-resistant steel angle steel tower internal leading type lightning conductor grounding structure for living area and few thunder district environment - Google Patents
A fire-resistant steel angle steel tower internal leading type lightning conductor grounding structure for living area and few thunder district environment Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 90
- 239000010959 steel Substances 0.000 title claims abstract description 90
- 239000004020 conductor Substances 0.000 title claims abstract description 74
- 230000009970 fire resistant effect Effects 0.000 title description 2
- 229910000870 Weathering steel Inorganic materials 0.000 claims abstract description 29
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 37
- 229910052742 iron Inorganic materials 0.000 claims description 17
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- 239000010410 layer Substances 0.000 description 4
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
- E04H12/10—Truss-like structures
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/24—Cross arms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
- H02G13/40—Connection to earth
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
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- Suspension Of Electric Lines Or Cables (AREA)
Abstract
The invention relates to an internal-leading lightning conductor grounding structure of a weathering steel angle steel tower for residential areas and environments of few lightning areas, which solves the defect that lightning protection design is not performed on the weathering steel angle steel tower in comparison with the prior art. According to the invention, the drainage wire A, the drainage wire B, the drainage wire C and the drainage wire D are all led down into the tower body from the top of the lightning wire cross arm and respectively connected with the grounding body through the tower foot grounding assembly after penetrating through the tower body, the drainage wire A and the drainage wire B are arranged along the tower body on the same side as the lightning wire A in the tower body, the drainage wire C and the drainage wire D are arranged along the tower body on the same side as the lightning wire B in the tower body, and the drainage wire A, the drainage wire B, the drainage wire C and the drainage wire D are all installed on the tower body through the insulating fixing hardware assembly. According to the invention, the drainage line is arranged between the tower top lightning conductor and the tower leg grounding drainage conductor of the weather-proof angle steel tower, so that the lightning counterattack fault probability of the weather-proof angle steel tower caused by overlarge self impedance is reduced.
Description
Technical Field
The invention relates to the technical field of weather-proof angle steel towers, in particular to a weather-proof angle steel tower internal leading type lightning conductor grounding structure for residential areas and environments of less lightning areas.
Background
The environment-friendly weather-resistant steel is low alloy steel between common steel and stainless steel, and a small amount of alloy elements are added into the steel to form a protective layer on the surface of a metal matrix, so that the corrosion is slowed down to the depth of the material, and the corrosion resistance of the steel is improved. Along with the continuous development of the power industry and the steel industry, the environmental protection consciousness is enhanced, the use of environmental protection type weathering steel materials for the tower structure has become a trend, the environmental problems caused by corrosion prevention of common iron towers are solved, the steel for the iron towers is saved, the corrosion prevention process is omitted, and the maintenance burden is lightened.
For traditional line towers, after lightning strikes are encountered by the lightning conductor or tower, lightning current is directed along the tower body to the ground. Because the resistance of the tower body of the traditional galvanized steel tower is small, the tower top potential formed by lightning current after the line is in lightning is mainly influenced by the grounding resistance. But adopts the shaft tower of resistant steel material, receives the influence of resistant steel surface corrosion layer, and the clearance impedance of resistant angle steel concatenation department is big, and body impedance is showing and is being higher than galvanized steel shaft tower, when lightning conductor or shaft tower meet the thunderbolt and do not form effective thunderbolt passageway, under the same ground resistance condition, the top of a tower potential that the lightning current formed on resistant steel shaft tower is obviously higher than galvanized steel shaft tower for the probability that the insulator takes place thunderbolt counterattack flashover on the resistant steel shaft tower is showing and is increasing, and thunderbolt fault risk is great.
At present, research on the weathering-resistant steel towers of the power transmission lines at home and abroad mainly focuses on the aspects of mechanical properties, welding properties, weather resistance and the like, and research on lightning protection performance of the weathering-resistant steel towers is not seen. In the prior art, lightning protection design for a pole tower is mainly as follows:
(1) The lightning protection measures commonly used for the power transmission line are that lightning conductors are erected, grounding wires are arranged and the like, but the problems of high impedance of the weather-resistant angle steel tower after erection are not effectively improved, and the lightning protection measures can be only used as lightning protection means of the conventional galvanized angle steel tower.
(2) Although some technologies use insulating composite materials as towers of tower heads, by setting lightning drainage wires, for example: a hollow tubular tower body structure is utilized, and a lightning drainage wire is vertically arranged along the inner side of the tower body; or a section of metal cross arm along the direction of the lead is respectively led out from the center of the ground wire cross arm at the top end of the composite tower head and the center of the metal tower body below the composite tower head, and a lightning drainage wire is vertically arranged at the tail end of the metal cross arm. However, the hollow tubular tower body structure cannot be formed by the weathering steel tower, the weathering steel material (weathering steel is also a metal material) is adopted in the weathering steel angle steel tower, the entire tower shows a high resistance state, and the design of a down lead by utilizing the metal tower body cannot be realized unlike the situation that the upper end of the composite tower adopts a composite material and the lower end adopts a metal material.
Meanwhile, due to the characteristics of weather-resistant steel materials, a pole tower form of an angle steel tower (lattice form) is adopted in practical application, and for a complex tower body structure of the angle steel tower, no engineering construction example of the weather-resistant steel angle steel tower is adopted in China, and relevant engineering application experience is lacked. Particularly, the angle steel tower made of weather-resistant steel, which is applied to residential areas, cannot be used for lead design like the prior art due to the lattice structure form of the angle steel tower, and the research of the prior art is difficult to provide effective guidance for the lightning protection design of the weather-resistant steel pole tower.
Therefore, how to develop a lightning protection scheme for weathering steel angle steel towers has become an urgent technical problem to be solved.
Disclosure of Invention
The invention aims to solve the defect that the lightning protection design is not carried out on a weathering steel angle steel tower in the prior art, and provides an internal leading type lightning conductor grounding structure of the weathering steel angle steel tower for the living area and the lightning-free area environment so as to solve the problems.
In order to achieve the above object, the technical scheme of the present invention is as follows:
the weathering steel angle steel tower internally-guided lightning conductor grounding structure for residential areas and environments of few thunder areas comprises a weathering steel angle steel tower, wherein the weathering steel angle steel tower comprises a tower body, a lightning conductor cross arm, an upper wire cross arm, a middle wire cross arm and a lower wire cross arm are arranged on the tower body from top to bottom, two lightning conductors are arranged on the lightning conductor cross arm,
The lightning protection device comprises lightning conductor A, lightning conductor B, lightning conductor C, lightning conductor B, a grounding assembly and a grounding assembly, wherein the number of the lightning conductor A and the lightning conductor B is 4, the lightning conductor A and the lightning conductor B are respectively arranged on the inlet side and the outlet side of the lightning conductor A through parallel groove clamps, the lightning conductor C and the lightning conductor D are respectively arranged on the inlet side and the outlet side of the lightning conductor B through parallel groove clamps, the lightning conductor A, the lightning conductor B, the lightning conductor C and the lightning conductor D are all led down into a tower body from the top of a lightning conductor cross arm and are respectively connected with the grounding assembly through the tower foot after penetrating through the tower body, the lightning conductor A and the lightning conductor B are arranged along the tower body on the same side as the lightning conductor A in the tower body, and the lightning conductor C and the lightning conductor D are respectively arranged on the tower body through the insulating fixing hardware assembly;
The drainage wire A, the drainage wire B, the drainage wire C and the drainage wire D are all installed on the frame of the tower body diaphragm through insulating fixed hardware components, and the combination position of the drainage wire A and the drainage wire B installed on the tower body diaphragm corresponds to the combination position of the drainage wire C and the drainage wire D installed on the tower body diaphragm in a mirror image mode.
The tower foot grounding assembly comprises flat iron, the flat iron is installed on the tower foot of the weathering steel angle steel tower through a tower foot firm fitting, the drainage wire A is connected to one end of the flat iron through a grounding terminal, and the other end of the flat iron is connected with the grounding body through a grounding lead.
The insulation fixing fitting assembly comprises a support, a wire seat at the rear end of the support is made of galvanized steel, a weather-resistant steel stop block is fixedly arranged at the front part of the support, a part of the support between the weather-resistant steel stop block and the wire seat is made of an insulation composite material, a wire clamp is arranged on the wire seat in a threaded manner, a drainage wire A is pressed on the wire seat by the wire clamp, the front end of the support, which is positioned on the weather-resistant steel stop block, is of a threaded structure, and the front end of the support is inserted on a tower body and is in threaded installation.
The distance between two adjacent insulating fixed hardware fitting components which are positioned at the same longitudinal position of the tower body is 2-3m.
The tower body diaphragm is a fork-shaped diaphragm or a cross-shaped diaphragm.
The tower leg firm hardware fitting comprises a pressing plate and a fixing plate, wherein the pressing plate and the fixing plate are L-shaped, the pressing plate and the fixing plate are installed in an overlapping mode, and an insulating pad is installed between the pressing plate and the fixing plate.
Advantageous effects
Compared with the prior art, the grounding structure of the weathering steel angle steel tower internal-leading lightning conductor for the living area and the low-lightning area environment has the advantages that the lightning conductor is arranged between the tower top lightning conductor of the weathering steel angle steel tower and the tower leg grounding down conductor, so that the lightning counterattack fault probability of the weathering steel angle steel tower caused by overlarge self impedance is reduced.
According to the invention, through insulating design of the fixed hardware assembly, the drainage wire and the angle steel tower made of weather-resistant steel material form insulating material physical isolation, so that corrosion caused by primary cell reaction is avoided; through the special installation design of drainage lines at the tower body diaphragm for 4 drainage lines are effectively fixed on the angle steel tower body of lattice form under the prerequisite that satisfies relevant electrical specification.
According to the invention, through the design that the drainage wire is led down from the tower body to the grounding body, the isolation protection range of the root of the tower body is reduced, the difficulty of artificial damage is increased, and the special requirements of small occupied area and difficult facility protection of the tower body in the residential area are met; meanwhile, according to the skin effect of the current, the lightning protection effect of the design that the drainage wire is led down from the tower body is relatively poor, and the lightning protection device is suitable for the requirements of areas (less thunder areas) with fewer average thunderstorm days; but the drainage wire is designed to be downwards led, so that the drainage wire is different from a climbing ladder of a transmission line tower in position, and is more convenient to overhaul; therefore, the invention is more suitable for implementation and application in living areas with crowd gathering and in environments with less thunder.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
Fig. 2 is a schematic structural view of a lightning conductor cross arm and an upper conductor cross arm in the present invention;
FIG. 3 is a schematic view of the structure of the middle and lower wire cross arms of the present invention;
FIG. 4 is a schematic view of a fork-type diaphragm according to the present invention;
FIG. 5 is a schematic view of a cross-shaped diaphragm according to the present invention;
FIG. 6 is a schematic view of a tower grounding assembly according to the present invention;
Fig. 7 is a schematic structural diagram of an insulating fixing fitting assembly according to the present invention;
fig. 8 is a schematic structural diagram of a tower leg firm fitting according to the present invention;
Wherein, 1-weather-resistant steel angle steel tower, 2-tower body, 3-lightning conductor cross arm, 4-upper conductor cross arm, 5-middle conductor cross arm, 6-lower conductor cross arm, 7-lightning conductor, 9-tower foot grounding component, 10-insulating fixed fitting component, 11-drainage wire A, 12-drainage wire B, 13-drainage wire C, 14-drainage wire D, 15-tower body cross arm, 16-frame, 17-parallel groove clamp, 18-lightning conductor A, 19-lightning conductor B, 20-grounding body, 21-band iron, 22-tower foot firm fitting, 23-grounding terminal, 24-grounding lead, 25-pressing plate, 26-fixing plate, 27-insulating pad, 31-pillar, 32-wire seat, 33-weather-resistant steel stop block and 34-clamp.
Detailed Description
For a further understanding and appreciation of the structural features and advantages achieved by the present invention, the following description is provided in connection with the accompanying drawings, which are presently preferred embodiments and are incorporated in the accompanying drawings, in which:
As shown in figure 1, the invention relates to a grounding structure of an internal lead lightning conductor of a weathering steel angle steel tower for residential areas and environments with few lightning areas, which comprises a weathering steel angle steel tower 1. As shown in fig. 2 and 3, the weathering steel angle steel tower 1 includes a tower body 2, a lightning conductor cross arm 3, an upper wire cross arm 4, a middle wire cross arm 5 and a lower wire cross arm 6 are installed on the tower body 2 from top to bottom, two lightning conductors 7 are installed on the lightning conductor cross arm 3, and the two lightning conductors 7 are a lightning conductor a18 and a lightning conductor B19 respectively.
The two lightning conductors 7 are connected to ground by means of a current-carrying wire design. According to basic principles such as overvoltage protection, insulation coordination, electromagnetic field distribution and the like, calculation is carried out on lightning electromagnetic fields, tower body voltage and current distribution in the tower space under the condition of different numbers of drainage lines, and the arrangement of the drainage lines is proved to be capable of effectively controlling and reducing the potential and insulation bearing voltage of the weathering steel tower; in addition, considering the conditions of pole tower distribution inductance, current skin effect, engineering construction cost and the like, the more the number of drainage lines arranged along the transmission line iron tower is, the more the lightning protection effect is obvious, but the engineering cost is gradually increased, so under the general condition, the lightning protection effect and the engineering cost are comprehensively considered, and when the number of the drainage lines exceeds four, the lightning protection effect basically tends to be constant value and the engineering cost is continuously increased in proportion by combining the basic principle of optimization, so that the number of the drainage lines is 4.
As shown in fig. 2, the drainage wire a11 and the drainage wire B12 are respectively installed on the incoming line side and the outgoing line side of the lightning conductor a18 through parallel groove clamps 17, and the incoming line side and the outgoing line side of the lightning conductor a18 are two sides of the lightning conductor a18 for the weathering steel angle steel tower 1. In the prior art, a base-by-base grounding mode is generally adopted for the traditional 110kV power transmission line ground wire and the OPGW. And for the weathering steel angle steel tower 1, the drainage lines are connected to the two sides of the lightning conductor A18, firstly, the connection design of 4 drainage lines is matched, and secondly, the connection mode of the ground wire and the optical cable is unified, so that the construction is convenient. And similarly, the drainage wire C13 and the drainage wire D14 are respectively arranged on the wire inlet side and the wire outlet side of the lightning wire B19 through parallel groove clamps.
For traditional circuit towers, after lightning conductor or tower are struck by lightning, lightning current is led to the ground along the tower body of the tower, and because the resistance of the galvanized steel tower body is small, the tower top potential formed by lightning current after the circuit is struck by lightning is mainly influenced by the ground resistance. The weather-resistant steel is low alloy steel between common steel and stainless steel, a good conductor is arranged in the weather-resistant steel, and the corrosion layer outside the weather-resistant steel is high in impedance, so that the high-impedance state is formed at the joint of the two weather-resistant steel, and the angle steel towers are assembled together by splicing a plurality of weather-resistant angle steel, so that the tower body impedance of the weather-resistant angle steel towers is obviously higher than that of galvanized steel towers, and after lightning wires or towers are struck by lightning, under the condition of the same ground resistance, the tower top potential formed by lightning current on the weather-resistant steel towers is obviously higher than that of the galvanized steel towers, so that the probability of lightning counterattack flashover of insulators on the weather-resistant steel towers is obviously increased, and the lightning fault risk is larger. Therefore, the drainage wire A11, the drainage wire B12, the drainage wire C13 and the drainage wire D14 are all led down into the tower body 2 from the top of the lightning conductor cross arm 3 and respectively connected with the grounding body 20 through the tower foot grounding assembly 9 after penetrating the tower body 2.
The drainage line A11 and the drainage line B12 are arranged along the tower body on the same side as the lightning conductor A18 in the tower body 2, namely the drainage line A11 and the drainage line B12 are close to one side of the lightning conductor A18; the drainage wire C13 and the drainage wire D14 are arranged along the tower body on the same side of the tower body 2 as the lightning conductor B19, namely the drainage wire C13 and the drainage wire D14 are close to the same side of the lightning conductor B19. The distance between two adjacent insulating fixing fitting assemblies 10 positioned at the same longitudinal position of the tower body is 2-3m. If the drainage wire is arranged along the outer side of the tower body, the drainage wire can collide with the position of the ladder stand arranged along the main material of the tower body, and the maintenance of the tower on the transportation and inspection personnel is not facilitated. Meanwhile, if drainage lines are arranged along the outer side of the tower body at the periphery of urban villages and towns or roads, the coverage protection range area is larger when the drainage lines are led to underground conductive lines, and the drainage lines are in conflict with the principle that the occupied area of urban and rural electricity is as small as possible. However, according to the skin effect of lightning current transmission, the closer to the outer side the drainage wire is arranged, the better the lightning current protection effect is, so that the lightning current protection device is more suitable for implementation and application in a lightning-free area through a tower internal guiding mode.
Different from the anticorrosive measure of traditional galvanized angle steel tower, resistant angle steel forms dense corrosion layer through the initial stage at the surface in order to reach the effect that prevents inside further corruption, on the one hand, if galvanized steel contacts with resistant steel of waiting and easily takes place the galvanic effect for the corruption of galvanized steel, on the other hand, resistant steel surface corrosion layer is liable to ponding and is accelerated corrosion process. To prevent this, the drain wire a11, the drain wire B12, the drain wire C13, and the drain wire D14 are all mounted on the tower body 2 by the insulating fixing clamp assembly 10.
As shown in fig. 7, the insulating fixing fitting assembly 10 includes a support column 31, a wire seat 32 at the rear end of the support column 31 is made of galvanized steel, and a weather-resistant steel stop block 33 is fixedly arranged at the front part of the support column 31, where the weather-resistant steel stop block 33 is used to be conveniently fixed on the weather-resistant steel angle steel tower 1 when being installed on the weather-resistant steel angle steel tower 1. The part of the strut 31 between the weather-resistant steel stop block 33 and the wire seat 32 is made of an insulating composite material, and the insulating composite material between the weather-resistant steel stop block 33 and the wire seat 32 achieves an insulating isolation effect. The wire clamp 34 is threadedly mounted on the wire mount 32 and the wire clamp 34 presses the drain wire a11 against the wire mount 32, forming a fixed mount for the drain wire. The front end of the strut 31, which is positioned on the weather-resistant steel stop block 33, is of a threaded structure, and the front end of the strut 31 is inserted on the tower body 2 and is in threaded installation, so that the installation of the insulating fixing fitting assembly 10 on the tower body 2 is realized.
Because the cross section of the angle steel tower is in a lattice mode, and the drainage wire A11, the drainage wire B12, the drainage wire C13 and the drainage wire D14 are all led down from the top of the lightning wire cross arm 3 and from the inside, how the four drainage wires are effectively fixed on the tower body is a difficult technical detail. According to the basic principle of skin effect, when the drainage lines are arranged along the inner side of the tower body, the interval between the drainage lines should be increased as much as possible so as to increase the lightning protection effect; meanwhile, based on the corrosion effect of the primary battery, the drainage wire should be prevented from being in direct contact with the weathering steel as much as possible.
Based on the above, the drainage wire A11, the drainage wire B12, the drainage wire C13 and the drainage wire D14 are all installed on the frame 16 of the tower transverse diaphragm 15 through the insulating fixing fitting assembly 10, and the combination position of the drainage wire A11 and the drainage wire B12 installed on the tower transverse diaphragm 15 and the combination position of the drainage wire C13 and the drainage wire D14 installed on the tower transverse diaphragm 15 are in mirror symmetry. Taking the tower diaphragm 15 as a fork diaphragm as an example, as shown in fig. 4, the insulating fixing fitting assembly 10 provided with the drainage wire a11, the drainage wire B12, the drainage wire C13 or the drainage wire D14 is fixed on the frame 16, so that the distance between the drainage wire a11 and the drainage wire C13, and the distance between the drainage wire B12 and the drainage wire D14 are maximized, thereby meeting the related requirements of current. Also, taking the tower spreader 15 as an example, as shown in fig. 5, the distance between the opposing insulating holder assemblies 10 is maximized. Taking the grid type cross arm as an example, the structure is more complex, and a plurality of drainage wires are arranged on the frame of the grid type cross arm through the insulating fixing hardware assembly, so that larger spacing between the drainage wires can be ensured.
As shown in fig. 6, the tower foot grounding assembly 9 comprises a flat iron 21, and the flat iron 21 is mounted on the tower foot of the weathering steel angle tower 1 through a tower foot firm fitting 22. The tower foot firm fitting 22 may be a conventional fixing fitting, but in order to ensure insulation, as shown in fig. 8, the tower foot firm fitting 22 may include a pressing plate 25 and a fixing plate 26, the pressing plate 25 and the fixing plate 26 are L-shaped, the pressing plate 25 and the fixing plate 26 are mounted in an overlapping manner, an insulation pad 27 is mounted between the pressing plate 25 and the fixing plate 26, and an insulation effect is achieved through the insulation pad 27. The drain wire a11 is connected to one end of the flat iron 21 through a ground terminal 23, and the other end of the flat iron 21 is connected to the ground body 20 through a ground lead 24.
Here, the ground wire of the power transmission line is provided with two directions along the outside or inside of the tower body, that is, in the prior art, the ground body 20 may be provided on the outside or inside of the tower body, and only the transitional part is required to be adopted in a conventional manner to avoid corrosion caused by direct contact between the ground wire and the tower body. Here, taking the grounding body 20 disposed outside the tower body as an example, in order to avoid corrosion caused by direct contact between the grounding wire and the tower body, the structure shown in fig. 6 is adopted, when the grounding body is disposed outside the tower body, the flat iron 21 is disposed outside the tower body, the upper end is connected with the drainage wire (the drainage wire is converted from inside to outside by using a conventional hardware fitting), and the lower end is connected with the grounding lead 24 to the grounding body 20.
When in actual use, when lightning conductor A18 or lightning conductor B19 encounters a lightning strike, according to different lightning strike positions and electrical trends, drainage wire A11, drainage wire B12, drainage wire C13 or drainage wire D14 lead electric shock down from the inside of tower body 2 to grounding body 20 for lightning-protection grounding, so that the line safety is ensured.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. A lead-in lightning conductor grounding structure in weathering steel angle steel tower for living area and few thunder district environment, including weathering steel angle steel tower (1), weathering steel angle steel tower (1) include tower body (2), and lightning conductor cross arm (3), go up wire cross arm (4), well wire cross arm (5) and wire cross arm (6) down are installed to tower body (2) top-down, install two lightning conductors (7), its characterized in that on lightning conductor cross arm (3):
The lightning protection device comprises lightning protection wires, and is characterized by further comprising 4 drainage wires, wherein the number of the drainage wires A (11) and the drainage wires B (12) is 4, the drainage wires A (11) and the drainage wires B (12) are respectively arranged on the inlet wire side and the outlet wire side of the lightning wire A (18) through parallel groove clamps (17), the drainage wires C (13) and the drainage wires D (14) are respectively arranged on the inlet wire side and the outlet wire side of the lightning wire B (19) through the parallel groove clamps (17), the drainage wires A (11), the drainage wires B (12), the drainage wires C (13) and the drainage wires D (14) are all led down from the top of the lightning wire cross arm (3) into the tower body (2) and are respectively connected with the grounding body (20) through a tower foot grounding assembly (9) after penetrating through the tower body (2), the drainage wires A (11) and the drainage wires B (12) are arranged along the tower body on the same side as the lightning wire A (18), the drainage wires C (13) and the drainage wires D (14) are respectively arranged along the tower body on the same side of the tower body (2), and the drainage wires A (11), the drainage wires C (12) and the drainage wires D (14) are fixedly arranged on the same side of the tower body (10) through the grounding assembly.
The drainage wire A (11), the drainage wire B (12), the drainage wire C (13) and the drainage wire D (14) are all installed on a frame (16) of the tower body diaphragm (15) through the insulating fixing hardware assembly (10), and the combination position of the drainage wire A (11) and the drainage wire B (12) installed on the tower body diaphragm (15) corresponds to the combination position of the drainage wire C (13) and the drainage wire D (14) installed on the tower body diaphragm (15) in a mirror image mode;
The tower foot grounding assembly (9) comprises flat iron (21), wherein the flat iron (21) is arranged on a tower foot of the weathering steel angle steel tower (1) through a tower foot firm fitting (22), the drainage wire A (11) is connected to one end of the flat iron (21) through a grounding terminal (23), and the other end of the flat iron (21) is connected with the grounding body (20) through a grounding lead (24); the insulation fixing fitting assembly (10) comprises a support column (31), a wire seat (32) at the rear end of the support column (31) is made of galvanized steel, a weather-resistant steel stop block (33) is fixedly arranged at the front part of the support column (31), a part of the support column (31) located between the weather-resistant steel stop block (33) and the wire seat (32) is made of an insulation composite material, a wire clamp (34) is arranged on the wire seat (32) in a threaded manner, a drainage wire A (11) is pressed on the wire seat (32) by the wire clamp (34), the front end of the support column (31) located on the weather-resistant steel stop block (33) is of a threaded structure, and the front end of the support column (31) is inserted on a tower body (2) and is in threaded installation; the distance between two adjacent insulating fixed hardware fitting assemblies (10) which are positioned at the same longitudinal position of the tower body is 2-3 m; the tower body diaphragm (15) is a fork-shaped diaphragm or a cross-shaped diaphragm; the tower leg firm fitting (22) comprises a pressing plate (25) and a fixing plate (26), wherein the pressing plate (25) and the fixing plate (26) are L-shaped, the pressing plate (25) and the fixing plate (26) are installed in an overlapping mode, and an insulating pad (27) is arranged between the pressing plate (25) and the fixing plate (26).
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| CN201910024971.2A CN109672137B (en) | 2019-01-11 | 2019-01-11 | A fire-resistant steel angle steel tower internal leading type lightning conductor grounding structure for living area and few thunder district environment |
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| CN201910024971.2A CN109672137B (en) | 2019-01-11 | 2019-01-11 | A fire-resistant steel angle steel tower internal leading type lightning conductor grounding structure for living area and few thunder district environment |
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| CN109672137B true CN109672137B (en) | 2024-05-14 |
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