KR20200091168A - Lightning protection structure of cable-stayed bridges - Google Patents

Abstract

The present invention relates to a cable-stayed bridge capable of supporting a truss or a girder with a stay cable inclined from a main tower. More specifically, a three-line lightning induction line, which is made of a cable having high strength with stainless strands, is installed at a distance above the uppermost stay cable of a cable-stayed bridge, while the lightning induction line is stably installed, having a predetermined distance and predetermined tension through spread fixing units placed adjacently to a girder and a main tower and a plurality of distance maintaining units placed between the spread fixing units at equidistant intervals. Therefore, lightning arising around a stay cable of a cable-stayed bridge is quickly and efficiently induced through the high-strength cable with stainless strands to prevent the stay cable from having a deterioration in strength or the rupture or disconnection of a strand due to lightning. In regard to the lightning induction line, three lines are uniformly placed in an inverted triangle shape through the spread fixing units and the gap maintaining units, thereby the lightning being capable of efficiently inducing through a wide area above the uppermost stay cable.

Description

Lightning protection structure of cable-stayed bridges

The present invention relates to a cable-stayed bridge (하도록張橋) to support the girder or truss with an inclined cable-stayed cable from the main tower, and more specifically, to install a three-wire equally arranged lightning induction wire on the upper side of the cable-stayed cable at the top of the cable-stayed bridge Accordingly, it is related to the cable lightning protection structure of the cable-stayed bridge that prevents the cable strength of the cable-stayed bridge from being deteriorated due to a lightning strike or a part of the strand being broken or disconnected by the three-wire lightning induction wire.

Generally, a cable-stayed bridge is a bridge structure that uses a cable-stayed cable as a main member, so that a cable-stayed cable from a main tower built on a bridge or foundation in the middle of a bridge can firmly support a girder or truss. will be.

Such cable-stayed bridges have the form of supporting the girder or truss with a slanted cable, which is used for shorter spans than suspension bridges. Korea's representative cable-stayed bridges include Seohae Bridge, Samcheonpo Bridge, Jindo Bridge, Incheon Bridge, and Mokpo Bridge.

However, the above-mentioned cable-stayed bridge has a disadvantage that it is always exposed from a lightning strike because a large number of cable-stayed cables are fixedly installed in an inclined form from the top of a very high pylon to the girder. The cable was fired due to a natural lightning strike on the cable, and the wire strength was lowered due to the ignition of the cable and the heat from the fire. Rupture occurred.

In addition, in 2005, the Rion-Antirion Bridge in Greece caused a fire due to a lightning strike, resulting in a cable disconnection accident. As a result, related experts came to conduct many studies and reviews on the causes and countermeasures of lightning damage.

Subsequently, the support cable of the cable-stayed bridge as described in Patent No. 10-1605511 is essentially a lightning inflow path depending on the location of the thundercloud, in order to solve the problems such as disconnection of the cable of the cable due to the lightning. Steel wires (pianos) that enable the current path formed by the lightning to flow into the ground and be formed by only one support cable to be a variety of current paths, and that constitute the support cable responsible for the mechanical action of the support cable Cable, etc.) To minimize the current flowing through the cable-stayed bridge, a lightning protection device for the cable-stayed bridge to protect the cable of the cable-stayed bridge from lightning has been devised and registered.

In addition, as in the registered patent No. 10-1657214, the charge amount of thunderclouds that may occur in the vicinity of the bridge spaced apart from the main tower equipped with a lightning rod is detected through the steel structure of the bridge, and the detected signal is transmitted wirelessly to detect it. A bridge equipped with a thundercloud detection and warning system capable of preventing an accident due to a lightning strike by issuing an alarm through a disaster control station according to the strength of a signal, and a connection portion electrically connected to a lower portion of the top plate of the bridge, and the connection portion It is an electrically connected charge detection unit that detects the amount of thundercloud charges generated above the bridge through the steel structure of the top plate and the cable, amplifies and digitally converts the detected signal, and then transmits it to the disaster control station through the wireless transmission unit. Thunderstorm detection and alarm system that can effectively trigger a lightning hazard warning according to the strength of the detection signal, and prevents human and disaster accidents caused by lightning strikes over bridges separated from the main tower This equipped bridge has been created and registered.

However, the above-described lightning protection means for the cable stayed on the cable-stayed bridge does not effectively induce a lightning strike into the protection line, which affects the tension so as not to affect the tensile strength of the cable and the support of the girder by the cable. The existing induction cable, which is designed in consideration of the weight that is not given, is very thin and significantly spaced from the cable, compared to the cable, so it has a problem that it cannot induce lightning fast and safely.

In addition, in the case of a system that detects and alerts thunderclouds, there is no clear interpretation of the correlation between thunderclouds and lightning, so malfunctions are very frequent, and it is simply a means of warning the occurrence of lightning strikes. It is not to prevent or reduce disconnection or deterioration of strength.

Korea Registered Patent 10-1605511 (Registration on March 16, 2016) Republic of Korea Registered Patent 10-1657214 (Registration on September 7, 2016)

The present invention is to improve the problems as described above, to install a three-wire lightning lead wire made of a high-strength cable by a stainless steel strand spaced apart from the upper end of the cable-stayed cable, but the above lightning guide wires are each connected to the main tower and the girder. As the diffusion fixtures arranged adjacently and a plurality of spacing holders arranged at equal intervals between these diffusion fixtures are configured to achieve a stable installation with a predetermined distance and a predetermined tension,

It is possible to efficiently induce lightning that occurred in the vicinity of the cable of the cable due to the lightning induction wire of 3 wires spread at regular intervals, and it is possible to prevent the lightning around the cable-stayed bridge from affecting the cable of the cable, thereby reducing the strength of the cable of the cable. Or, it is an object of the present invention to provide a lightning protection structure for a cable-stayed bridge cable having a characteristic that can prevent a safety accident due to a break or disconnection.

The present invention for achieving the object as described above, by using the main column and girder of the cable-stayed bridge on the upper side of the cable-stayed top cable, to form a three-wire lightning lead wire made of high-strength cable by a stainless steel strand,

The upper end of the lightning lead wire is fixedly installed by the main tower anchor, and the lower end of the lightning lead wire is fixed by the girder anchor, and the turn induction buckles adjacent to the main tower anchor and the girder anchor are respectively formed to form a turnbuckle. Is done.

The present invention is to be able to quickly and efficiently induce lightning occurring around the cable-stayed cable of the cable-stayed bridge with a high-strength cable made of stainless steel strands, thereby preventing the cable-stayed cable from being deteriorated in strength due to a lightning strike or strand break or disconnection. The lightning-inducing wire of is effective in inducing lightning through a large area on the upper side of the cable at the top of the cable, as the three wires are evenly arranged in the shape of an inverted triangle through the spreading fixture and the gap maintaining area.

1 is a schematic view of a cable-stayed bridge to which a lightning protection structure according to the present invention is applied
2 is a schematic diagram of a lightning protection structure according to the present invention
Figure 3 is an enlarged view of the upper part of the protection line of the lightning protection structure according to the present invention
Figure 4 is an enlarged view of the lower part of the protection line of the lightning protection structure according to the present invention
5 is an overall view of the diffusion fixture of the lightning protection structure according to the present invention
Figure 6 is an overall view of the distance maintenance of the lightning protection structure according to the present invention
Figure 7 is another embodiment of the distance maintenance of the lightning protection structure according to the present invention
8 is an explanatory view of the operation of FIG. 7;
Figure 9 is another embodiment of the spacing maintenance of the lightning protection structure according to the present invention
Figure 10 is another embodiment of the spacing maintenance of the lightning protection structure according to the present invention

Additional objects, features and advantages of the invention may be more clearly understood from the following detailed description and accompanying drawings.

Prior to the detailed description of the present invention, the present invention is capable of various changes, and may have various embodiments. The examples described below and illustrated in the drawings are intended to limit the present invention to specific embodiments. No, it should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

Also, when an element is referred to as being “connected” or “connected” to another component, it may be directly connected to or connected to the other component, but other components may exist in the middle. It should be understood that. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.

Subsequently, the terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, the terms "include" or "have" are intended to indicate that there are features, numbers, steps, operations, components, parts or combinations thereof described in the specification, and one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

In addition, terms such as "... unit", "... unit", "... module" described in the specification mean a unit that processes at least one function or operation, which is hardware or software or hardware and It can be implemented with a combination of software.

In addition, in the description with reference to the accompanying drawings, the same reference numerals are assigned to the same components regardless of reference numerals, and redundant descriptions thereof will be omitted. In the description of the present invention, when it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view of a cable-stayed bridge to which a lightning protection structure according to the present invention is applied, FIG. 2 is a schematic view of a lightning protection structure according to the present invention, and FIG. 3 is an enlarged view of an upper part of a protection line of a lightning protection structure according to the present invention , FIG. 4 is an enlarged view of a lower portion of a protection line of a lightning protection structure according to the present invention, FIG. 5 is an overall view of a diffusion fixture of a lightning protection structure according to the present invention, and FIG. 6 is an interval of a lightning protection structure according to the present invention This is the overall view of the retainer.

The lightning protection structure for the cable stayed on the cable stayed bridge according to the present invention as shown in the figure is the cable stayed at the top of the large number of cable stayed at the top of the large number of cable stayed at the top of the cable tower (102) and the girder (103) or truss. ) Is installed spaced apart from the upper side, the lightning protection structure should also be independently installed for each uppermost cable 101 according to the construction type of the cable, which is usually installed downwardly from one main tower to both sides.

The lightning protection structure is made of three strands of lightning induction wires 10 and 10', wherein the lightning induction wires 10 and 10' are made of high-strength cables made of stainless steel strands, and are made of stainless steel. It prevents corrosion from the same time and secures a physical strength of a certain level or more and overcomes weaknesses such as bending and disconnection by the strand structure, and the above lightning induction wires 10 and 10' are applied to the tension of the cable 101. It should be installed so as to maintain a tensile state that does not affect it.

The tip of the lightning induction wire 10, 10' is fixed to the end of the upper end of the main tower 102 using the main tower fixing tool 20, and the lower end of the lightning induction wire 10, 10' is girder. The lower end is fixed to the upper part of the girder 103 using the fixing device 30, and the main tower fixing device 20 and the girder fixing device 30 have a shape of an existing bracket made by cutting and welding a metal plate. , Each end of the lightning induction wires 10 and 10' is fixed in an inclined form so that the above lightning induction wires 10 and 10' can be installed with an inclination angle that matches the inclination angle of the cable 101. It would be ideal to do so.

In addition, the turnbuckle 40 and 40' are formed by connecting turnbuckles 40 and 40' at each end of the lightning induction wires 10 and 10' adjacent to the main tower anchorage 20 and the girder anchorage 30. ) To give a certain level of tension to the lightning induction wire 10, 10', and periodically check the tension of the lightning induction wire 10, 10' to turn the buckle 40 As the (40') is rotated, it must be managed to maintain a stable installation state without sagging or sagging of the lightning induction wires 10 and 10'.

Subsequently, the lightning induction wires 10 and 10' consist of three strands, two of the three strands being arranged side by side on the upper side, and the other one strand is disposed on the lower side between the two strands, in cross section. It should be arranged to have the shape of an inverted triangle.

This is designed to have a large area or an induction area by the two-wire lightning guide wires located at the upper side in consideration of the direction in which lightning generated from thunderclouds is directed toward the cable-stayed cable 101, so that the above lightning can be effectively induced. The lightning induction line of the lower 1 line serves to induce such a lightning strike again when the lightning induces the lightning induction line of the upper 2 lines to approach the cable 101.

Subsequently, as a means for equally arranging the three-wire lightning induction wires 10 and 10' as an inverted triangular shape, the diffusion fixture 50 located at both ends of the lightning induction wires 10 and 10' ( 50') and the spreading fixtures 50, 50' are arranged at equal intervals between the spreading fixtures 60 and 60', and the spreading fixtures 50 and 50' are the main towers. The lightning guide wires 10 and 10' are proximate to each end portion of the lightning guide wires 10 and 10', the ends of which are fixed to the anchoring fixtures 20 and the girder anchors 30, and are accurately formed in an inverted triangle shape. It acts as a compulsory physics means to be evenly arranged.

That is, the diffusion fixing fixtures 50 and 50' have fixed arms 51 and 51' in three directions, and end portions of the fixed arms 51 and 51' are formed by fastening bolts and fastening nuts. It is a combination of the fixed clamps 52 and 52' that are closed or opened.

Accordingly, the diffusion fasteners 50 and 50' are fastened to the ends of the lightning induction wires 10 and 10', and the fixed arms 51 and 51' are arranged in a "Y" shape. In this case, the lightning induction wires 10 and 10' are closely attached to each of the fixing arms 51 and 51' to be firmly coupled and fixed through the fixing clamps 52 and 52'.

At this time, through the fixing clamps 52 and 52', three lightning strike leads 10 and 10' are firmly coupled and fixed to the fixing arms 51 and 51' so that the lightning strike leads ( 10) (10') is arranged at regular intervals with each other, and at the same time, due to the coupling to the "Y" shaped fixing arms 51, 51', two lightning strike leads 10, 10' ), and the remaining 1 line can be arranged below the guide line of these 2 lines.

In addition, the diffusion fixture 50 (50') as described above forcibly spreads the lightning lead wires 10, 10' while serving to have directionality at the same time with a certain distance, while these diffusion fixtures 50 (( 50'), the spacer 60, 60' coupled between the lightning guide lines 10 and 10' ensures that they are continuously maintained at regular intervals and at the same time caused by the interference of wind or the like. (10) (10') The purpose is to solve the sagging, mutual interference or gap imbalance.

The above-described gap holders 60 and 60' are also formed with protruding support arms 61 and 61' in three directions. The support arms 61 and 61' are hinge shafts 66. The shaft is fixed from the gap holders 60 and 60' by the hinge shaft 66, and has a structure that can be rotated as an axial point. In the gap holders 60 and 60', Support arm (61) (61') Since the arm receiving groove (65) (65') is formed in three directions to insert the lower end of the arm receiving groove (65) (65'), the support arm (61) inside When the lower end of the 61' is inserted into the shaft holding the hinge shaft 66 and the spacer 60, 60' and the supporting arms 61, 61' are axially coupled, the supporting arms 61 ) (61') is a state that can be rotated left and right only within the inner width range of the arm receiving grooves 65 and 65'.

Opening clamps 62 and 62' are respectively formed at the ends of the supporting arms 61 and 61' so that the hinged pressure plate 63 is closed or rotated open or closed by the rotating shaft 64. It is.

Accordingly, by opening the pressure plate 63, the support arms 61 and 61' of the gap holders 60 and 60' are arranged to have a "Y" shape, and then the respective opening and closing clamps 62, ( After inserting the lightning induction wires 10 and 10' in the installation state to 62'), the above-described spacing holders 60 and 60' are secured by close fixation of the pressing plate 63 by the rotating shaft 64. It is easy to install.

Therefore, considering the gap between the diffusion fixing fixtures 50 and 50' fixed to both ends of the lightning induction wires 10 and 10', the above-described spacing guiding holes 60 and 60' are lightning strike leads. (10) (10') The above-described lightning-inducing wires 10 and 10' are installed at regular intervals over the entire distance, as well as sloshing or sagging due to the influence of wind. It is possible to maintain a stable installation state over the entire section without any part.

In addition, since the support arms 61 and 61' of the space holders 60 and 60' as described above can be rotated even when they have a predetermined angle in the inner width range of the arm receiving grooves 65 and 65', the above When strong wind acts on the lightning induction wires 10 and 10', the support arms 61 and 61' naturally rotate according to the shaking of the lightning induction wires 10 and 10', and the coupling between each other is high. It is configured so that excessive stress or load is not applied to the government.

Particularly, in the present invention, the support arms 61 and 61' are rotated to some extent, and at the same time, when the forcibly rotating force to the support arms 61 and 61' is lost, means for returning to the original position When the lightning induction wire 10, 10' is shaken by wind or the like as the additional configuration, the above support arms 61, 61' are also shaken together with the lightning induction wire 10, 10'. (10) (10') It is to suppress the excessive shaking, and at the same time, the distance between the lightning-inducing wires 10 and 10' to be shaken is maintained to a certain degree, and the lightning-inducing wires 10 and 10 above When the shaking to') disappears, the three-wire lightning lead wires 10 and 10' can maintain the installation state of an inverted triangular shape at equal intervals as in the original installation state due to the return means.

Thus, on one side of the gap retainer (60, 60'), one side of the arm receiving groove (65) (65') is formed by combining the arm cover (80) so that it can be separated open or closed, but the hinge shaft ( 66, the lower end of the supporting arms (61, 61') are inserted into the elastic body (70, 70') separately provided as shown in FIG.

That is, the elastic body (70, 70') is made of a soft elastic material, such as rubber, after being inserted into the hinge shaft 66 so as to be in close contact with each of the lower sides of the support arms (61, 61'), the When the arm cover 80 is coupled and fixed, the elastic bodies 70 and 70' support arms 61 and 61' within the arm receiving grooves 65 and 65' due to the pressing force of the arm cover 80. ) And the assembly in a tightly adhered state.

At this time, the inner surfaces of the arm receiving grooves 65 and 65', the lower side surfaces of the supporting arms 61 and 61', and the inner surfaces of the arm cover 80 are formed with resistance grooves 67 and 67 in the same shape, respectively. ') is formed radially with the hinge axis 66 as an axial point, and on both sides of the elastic body 70 and 70', the resistance protrusions 71 and 71 are formed in correspondence with the resistance grooves 67 and 67'. As the 71') is radially formed, the mutual resistance grooves 67, 67' and the resistance protrusions 71, 71' are interlocked, and the support arms 61, () from the gap holders 60, 60' 61') as well as the elastic bodies 70 and 70' also have a non-rotating state.

However, when the lightning induction wires 10 and 10' are shaken by the wind, the fixing arms 51 and 51' are also shaken together. Due to the shaking, the elastic bodies 70 and 70 ') is caused by twisting due to the rotational force of the supporting arms 61, 61' against the gap holders 60, 60' in the restrained state of the ends by the resistance protrusions 71, 71' at both ends. Due to the torsion of the elastic body (70, 70'), the support arms (61, 61') are shown in FIG. 8 within the allowable range of twist of the elastic body (70, 70'). Likewise, it can be rotated at a predetermined angle.

In addition, when the shaking of the support arms 61, 61' due to wind or the like stops, the elastic bodies 70, 70' of the torsional state are returned to the original shape, and the support arms 61, 61' of the rotating state By returning to the correct position, it is possible to maintain the uniform arrangement of the lightning induction wires 10 and 10', and in the case of severe interference such as wind, the support arms 61 and 61' above are the lightning induction wires. (10) (10') is to flow to some extent, and when the resistance is removed, it quickly returns to the original installation state to maintain a stable installation state.

Subsequently, as another embodiment of the rotation and return means of the support arms 61 and 61', the tension spring 90 having one end fixed to the gap holders 60 and 60' as shown in FIG. The other ends of the 90') are fixedly formed on both sides of the support arms 61, 61', but the tension springs 90, 90' are formed on both sides of one support arm 61, 61'. As it is configured to be fixed in a symmetrical shape, the support arms 61 and 61' have a structure that can be rotated left and right by the tension springs 90 and 90' on both sides, and at the same time, when artificial rotational force is lost, As can be returned to the position of the support arms (61) (61') in the state in which the tension springs (90) (90') as described above are coupled according to the shaking of the lightning guide wires (10) (10') While rotating at a predetermined angle to suppress the shaking of the lightning induction wires 10 and 10', as well as when the shaking of the lightning induction wires 10 and 10' disappears, the support arms 61 and 61' It is to quickly return to the original position so that the lightning induction wires 10 and 10' can be arranged at regular intervals.

Subsequently, as another embodiment of the present invention, as shown in FIG. 10, the fixing arms 51, 51' of the diffusion fixtures 50, 50' and the supporting arms of the gap holders 60, 60' As it is configured so that each individual length can be adjusted for (61'), a lightning induction wire is provided in accordance with various site conditions and construction standards such as the size of a cable-stayed bridge or the cable's thickness or length to realize a lightning protection structure. 10) (10') is to be able to change the placement interval.

That is, the pocket portion 51a is formed on one side by dividing and forming the fixing arms 51 and 51' of the diffusion fixtures 50 and 50', and the pocket portion is formed on the other side by forming the fitting portion 51b. According to the insertion amount of the fitting portion 51b with respect to (51a), the position of the variable and fixed clamps 52, 52' relative to the length of the fixed arms 51, 51' is variable, and the pocket portion 51a Lightning guide wire (10) (10) by adjusting the length of the fixing arms (51, 51') for the entire diffusion fixture (50) (50') by fixing the fitting portion (51b) inserted in) to the bolt and nut The interval between') can be set freely.

In addition, the above-described gap holders 60 and 60' are also formed by dividing the supporting arms 61 and 61' to form a pocket portion 61a on one side and a fitting portion 61b on the other side. According to the insertion amount of the fitting portion 61b with respect to the pocket portion 61a, the position of the variable and the opening and closing clamps 62 and 62' with respect to the length of the supporting arms 61 and 61' is variable, and the pocket portion Lightning guide wire (10) through adjustment of the length of the supporting arms (61, 61) against the entire gap holder (60) (60') by fixing the fitting portion (61b) inserted in (61a) to the bolt and nut )(10').

As described above, the lightning protection structure for the cable-stayed bridge according to the present invention effectively prevents the strength drop or disconnection of the cable-stayed cable by effectively inducing a lightning strike occurring in a thundercloud with a relatively simple installation. It can prevent safety accidents caused by lightning strikes.

The configuration described in the embodiments and drawings described above are only the most preferred embodiment of the present invention and do not represent all the technical spirit of the present invention, and various equivalents and modifications that can replace them It should be understood that there may be examples.

10,10': Lightning induction line
20: main tower anchorage
30: girder anchorage
40,40': Turnbuckle
50,50': Diffusion fixture 51,51': Fixed arm
52,52': Fixed clamp
60,60': Spacing area 61,61': Support arm
62,62': Opening and closing clamp 63: Pressure plate
64: rotating shaft 65,65': arm receiving groove
66: hinge shaft 67,67': resistance groove
70,70': Elastic body 71,71': Resistance protrusion
80: arm cover
90,90': Tension spring
100: cable-stayed bridge 101: cable-stayed cable
102: tower 103: girder

Claims (10)

A three-wire lightning lead wire (10) (10') made of high-strength cable made of stainless steel strands using the main tower (102) and girder (103) of the cable-stayed bridge (100) on the upper side of the cable-stayed cable (101) on the top of the cable-stayed bridge (100) ) Apart,
The upper end of the lightning lead wires 10 and 10' of the three wires is fixedly installed by the main tower anchor 20, and the lower end of the lightning lead wires 10 and 10' is attached to the girder anchor 30. It is fixed to be installed by, and the turn induction pipes 10 and 10' adjacent to the main tower anchor 20 and the girder anchor 30 are formed with turnbuckles 40 and 40', respectively, to induce lightning strike of the three wires. Lightning protection structure for a cable-stayed bridge cable, characterized in that the lines (10) (10') are configured to be evenly disposed on the top of the top cable (101) in a tension state by rotation of the turnbuckles (40, 40').
According to claim 1,
Lightning strike on the cable-stayed bridge cable, characterized in that the two of the three lightning induction wires 10 and 10' are arranged to have an inverted triangular arrangement structure in which two lines are located at the top and one line is located at the center and bottom of these two lines. Protection structure.
According to claim 1,
According to the inclination angle of the top cable (101), fix the lightning lead wire (10) (10') of the three wires using the main tower anchorage (20) and the girder anchorage (30),
The lightning guide wires 10 and 10' adjacent to the main tower anchor 20 and the girder anchor 30 are combined with diffusion anchors 50 and 50' having three-way fixing arms 51 and 51'. Lightning guiding line (10) (10') is configured to be forcibly and evenly arranged, and between the diffusion fixtures (50, 50'), a three-way support arm (61) (61') with a space for holding the gap (60) ) (60') is formed at regular intervals to form a lightning protection structure for the cable-stayed bridge cable, characterized in that the lightning conductors (10) (10') of the evenly arranged are maintained at regular intervals.
According to claim 3,
On each end of the fixing arms (51, 51') of the diffusion fixture (50, 50'), the fixed clamps (52, 52') having fastening bolts and fastening nuts are coupled to the cable-stayed cable. Against lightning protection structure.
According to claim 3,
At each end of the support arms (61, 61') of the gap holder (60, 60'), one side hinged to the end of the support arms (61, 61'), the pressure plate (63) is rotated on the rotating shaft ( Lightning protection structure for cable-stayed bridge cables characterized in that the opening and closing clamps 62 and 62' which are closely coupled by 64) are formed.
The method of claim 5,
A gap receiving groove (60) (60') is formed with a three-way arm receiving groove (65) (65') to insert the lower end of each support arm (61, 61'), but the support arm (61) (61') is to support the hinge shaft (66) as an axis to support the arm (61) (61') to rotate as it is coupled to the arm receiving groove (63) (63') using the hinge shaft (66). Lightning protection structure for cable-stayed bridge cables, characterized by configuration.
The method of claim 6,
Inside the arm receiving grooves 65 and 65', elastic bodies 70 and 70', which are brought into close contact with both sides of the supporting arms 61 and 61', are inserted,
The elastic body (70, 70') is a lightning strike for a cable-stayed cable characterized in that it is configured to be securely fixed between the inner surface of the arm receiving groove (65, 65') and the outer surface of the supporting arms (61, 61'). Protection structure.
The method of claim 7,
An arm cover 80 for opening the arm accommodating grooves 65 and 65' is formed on one side of the gap holders 60 and 60',
Resistive grooves 67 formed radially around the hinge shaft 66 on the inner surfaces of the arm receiving grooves 65 and 65', on both sides of the supporting arms 61 and 61', and on the inner surfaces of the arm cover 80, respectively ) (67'), and on both sides of the elastic body (70, 70'), the resistance protrusions (71, 71') corresponding to the resistance grooves (67, 67') are protruded to form these resistances. Lightning protection structure for the cable-stayed bridge cable, characterized in that the grooves (67) (67') and the resistance protrusions (71, 71') are configured to be closely coupled to each other in a locked state.
The method of claim 6,
The tension springs 90 and 90' having one end fixed to the gap holders 60 and 60' are fixedly coupled to both sides of each of the supporting arms 61 and 61', so that the tension spring 90 ) (90'), the support arm (61) (61') is a lightning protection structure for the cable-stayed bridge cable, characterized in that the hinge shaft 66 is configured to revolve around the axis.
According to claim 3,
The fixing arms 51, 51' of the diffusion fixtures 50, 50' and the supporting arms 61, 61' of the gap holders 60, 60' are fitted with the pockets 51a, 61a. The fixing arms 51 and 51' according to the insertion and fixing positions of the fitting portions 51b and 61b with respect to the pocket portions 51a and 61a by dividing and forming the portions 51b and 61b correspondingly to each other ) And the support arms (61, 61') is a lightning protection structure for a cable-stayed cable, characterized in that the length is configured to vary.

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