KR20230150667A - Structure of support braket for Rigid Conductor System - Google Patents

Abstract

The present invention relates to a support bracket structure for a rigid traction line, in which the support bracket structure comprises: a support pipe; a support insulator connected to both sides of the support pipe; a support fixed to a tunnel wall; and a bracket support pipe connecting the support and the support insulator. Accordingly, durability such as bending and torsional strength of a bracket can be improved to stably support the rigid traction line in a direct current (DC) traction line. In addition, since the support bracket structure is simple, there is an advantage that maintenance and construction are easy compared to the existing support bracket. In addition, since an R-bar method can be applied not only in an alternating current section but also in a direct current section, there is an advantage that the support bracket structure can be used in a high-speed traction line of 160 km/h or higher. In addition, a support bracket structure capable of adjusting an inclination is applied, so that it is possible to prevent lateral wear due to a cant in a curved section.

Description

Structure of support braket for Rigid Conductor System}

The present invention relates to a bracket structure for firmly supporting a rigid tram line. More specifically, a support bracket structure for a rigid tram line R-bar to stably support a rigid tram line when operating a direct current (DC) tram line in a tunnel. It's about.

In general, the catenary type of the tram line can be divided into the processing type, the third rail type, and the rigid type. The above processing formula is applied to general ground sections by using a catenary wire, but it has the disadvantage of being difficult to apply to a tunnel section because the catenary line, a catenary line, and an auxiliary catenary line must be catenaryed together, so the required catenary height is high.

In other words, in order to apply an overhead tram line to a tunnel section, the cross-sectional area of the tunnel must be significantly increased, resulting in excessive construction costs. In addition, daily inspection and maintenance are not easy due to the narrow space, and when the tram line wears out, the tram line is damaged. Of course, it has the disadvantage of having to replace the steering wire as well.

Meanwhile, the third rail type is a method of supplying power by installing a feed rail on the road surface or on the side. It has the advantage of being installed in a narrow space such as a tunnel, but the feed rail is placed on the ground. Due to the high risk of electric shock, it is only applied to certain special sections.

The rigid body type integrates the catenary into a rigid body and installs it using a separate structure such as a bracket. Since it does not require a clamshell wire, it is applied to sections where it is difficult to install a clamshell wire, such as a tunnel.

Figure 1 is a diagram showing the structure of an existing rigid catenary bracket (1).

Referring to Figure 1, this rigid body type consists of a support (2) installed inside the tunnel and a bracket (1) provided on the support. A support bracket consisting of an insulator and metal fittings provided on the support is installed.

However, since the rigid body type lacks flexibility compared to the overhead catenary, if an error exceeding the limit occurs in its installation, excessive load is repeatedly applied to the vehicle's pantograph or support structure, which may cause damage. There is.

In addition, supports and support brackets for T-bars are manufactured through welding, and in this case, there is a problem in that stress corrosion cracks occur due to residual stress present in the welded area, making durability vulnerable.

In addition, the rigid catenary bracket used in high-speed rail operation is repeatedly subject to load and vibration. During welding, part of the base material is joined in a molten state by high-temperature heat, so the tissue characteristics change differently between the welded area and the base material. There is a problem of vulnerability to repetitively applied loads and vibrations.

Korean Patent Publication No. 10-2011-0012328 (published on February 9, 2011) Korean Patent Publication No. 10-2018-0029670 (published on March 21, 2018)

The present invention is intended to solve the above-mentioned problems, and provides a rigid catenary support bracket structure that can improve durability such as bending and torsional strength of the bracket to stably support a rigid catenary in a DC (direct current) catenary line. It has a purpose.

In addition, the purpose is to prevent uneven wear of the tram line by applying a rigid tram line support bracket structure that can adjust the inclination.

However, the object of the present invention is not limited to the object mentioned above, and other object not mentioned will be clearly understood by those skilled in the art from the description below.

For this purpose, the present invention is a rigid tram line comprising a support pipe, a support insulator connected to both sides of the support pipe, a support fixed to the tunnel wall, and a bracket support pipe connecting the support and the support insulator. Provides a support bracket structure.

In addition, the support insulator may include a rod forming a support frame, and an insulating housing made of silicone formed by injection molding along the outer peripheral surface of the rod.

Additionally, the rod is preferably made of FRP.

In addition, the right end of the rod may be inserted into the first hollow part of the support pipe, fitted into it, and pressed together, and the left end of the rod may be inserted into the second hollow part of the bracket support pipe, fitted into it, and pressed together.

Additionally, the second hollow portion of the bracket support pipe may be divided in two by forming an internal partition.

In addition, the support is in the form of a support bolt, and the through bolt penetrates and couples the connection bracket, and the through bolt is combined with a washer and a nut to be integrally fixed to the bracket support pipe.

Additionally, an insertion hole through which the through bolt is coupled to the bracket support pipe may be formed, and the insertion hole may have an oval cross-section.

Additionally, a spherical washer may be formed on the contact surface when the insertion hole of the bracket support pipe is coupled with the through bolt.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, terms or words used in this specification and claims should not be interpreted in their usual, dictionary meaning, and the inventor may appropriately define the concept of the term in order to explain his or her invention in the best way. It should be interpreted with meaning and concept consistent with the technical idea of the present invention based on the principle that it is.

The present invention makes it possible to improve durability, such as bending and torsional strength, of the bracket to stably support a rigid catenary in a DC (direct current) catenary line through a rigid catenary support bracket structure.

In addition, the support bracket structure is simple, so it has the advantage of being easier to maintain and construct compared to existing support brackets.

In addition, the R-bar method can be applied not only to AC sections but also to DC sections, so it has the advantage of being able to be used on high-speed tram lines exceeding 160 km/h.

In addition, moisture infiltration can be prevented through the intermediate separator, thereby preventing power outages, and the addition of support insulators increases the insulation distance to improve electrical performance.

In addition, by applying a support bracket structure that allows tilt adjustment, it is possible to prevent uneven wear caused by cant in curved sections.

Figure 1 is a diagram showing the existing rigid catenary bracket structure,
Figure 2 is a diagram showing the structure of a rigid catenary bracket 100 according to a preferred embodiment of the present invention, Figure 3 is a diagram showing the structure of the bracket 100 of Figure 2 applied to a catenary line,
Figures 4 (a) and (b) are diagrams showing the manufacturing process before and after assembly of the rigid catenary bracket 100 of Figure 2, respectively.
Figures 5 (a) and (b) are diagrams showing the support insulator 120 and the support pipe 110 in the rigid catenary bracket 100 of Figure 2 in more detail, respectively.
Figures 6 (a) and (b) are diagrams showing the bracket support pipe 130 and support 140 in the rigid catenary bracket 100 of Figure 2 in more detail, respectively.
Figure 7 is a view showing another type of bracket support pipe 230 in the rigid catenary bracket structure according to an embodiment of the present invention.
Figures 8 to 11 are diagrams showing a rigid catenary bracket to which a tilt adjustment structure is applied according to another embodiment of the present invention.

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

Although first, second, etc. are used to describe various components, these components are of course not limited by these terms. These terms are merely used to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may also be a second component within the technical spirit of the present invention.

Like reference numerals refer to like elements throughout the specification.

The size and thickness of each component shown in the drawings are shown for convenience of explanation, and the present invention is not necessarily limited to the size and thickness of the components shown.

In addition, the terms described below are terms defined in consideration of functions in the present invention, and may vary depending on the intention or custom of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

In addition, the examples below do not limit the scope of the present invention, but are merely illustrative of the elements presented in the claims of the present invention, and are included in the technical idea throughout the specification of the present invention and constitute the scope of the claims. Embodiments that include elements that can be replaced as equivalents may be included in the scope of the present invention.

Figure 2 is a diagram showing the structure of a rigid catenary bracket 100 according to a preferred embodiment of the present invention, and Figure 3 is a diagram showing the structure of the bracket 100 of Figure 2 applied to a catenary line.

2 and 3, in an electric railway, a track containing a tram line that supplies electricity to an electric vehicle is called a tram line, and a support bracket 100 is installed on the ceiling of a tunnel or underground part, and the support bracket 100 A rigid catenary (30) is fixed to the lower part of the electric vehicle to supply electricity to the electric vehicle. At this time, the rigid catenary mechanically contacts the pantograph (20) and transmits electrical energy to the railroad car (10). In addition, the rigid tram line 30 is a combination of a tram line and a rigid support portion supporting the tram line, and the tram line and the rigid support portion supporting the tram line may be formed as one piece. In addition, the rigid catenary (30) is shortened to Rigid Bar and is expressed as R-bar, and the rigid catenary whose cross-sectional shape is similar to a T is specifically called T-bar. Although the R-bar is widely used because it has superior constructability and current collection performance compared to the T-bar, in Korea, the T-bar is applied to the DC section and the R-bar is applied to the AC section.

In addition, a clamp 40 is connected to supply electricity to the rigid catenary 30, and the clamp 40 is configured as a groove/protrusion combination on both sides of the upper part of the rigid catenary 30 or is coupled with a bolt and nut. It is composed of a structure in which the clamp 40 is connected to the rigid catenary 30.

The rigid catenary bracket 100 according to the present invention includes a support pipe 110 as a support frame, support insulators 120 connected to both sides of the support pipe 110, and a support fixed to the tunnel wall 50 ( 140) and a bracket support pipe 130 connecting the support 140 and the support insulator 120.

Hereinafter, the detailed structure of the rigid catenary bracket 100 according to the present invention will be described in more detail with reference to FIGS. 4 to 6.

Figures 4 (a) and (b) are diagrams showing the manufacturing process before and after assembly of the rigid catenary bracket 100 of Figure 2, respectively, and Figures 5 (a) and (b) are diagrams showing the rigid catenary bracket 100 of Figure 2, respectively. A drawing showing the support insulator 120 and the support pipe 110 at 100 in more detail, (a) and (b) of FIGS. 6 respectively show the bracket support pipe 130 and the rigid catenary bracket 100 of FIG. 2. This is a drawing showing the support 140 in more detail.

Referring to FIG. 5(b), the support pipe 110 is in the form of a tube with a hollow portion, and the material may be steel, aluminum, or aluminum alloy. The support pipe is preferably made of aluminum alloy, which is lightweight and resistant to corrosion.

Additionally, the FRP rod of the support insulator 120 may be inserted into the hollow part of the support pipe 110.

Referring to FIG. 5(a), the support insulator 120 includes an FRP rod 121 forming a support framework, and an insulating housing 122 made of silicone formed by injection molding along the outer peripheral surface of the FRP rod 121. can do. At this time, the FRP rod 121 is used by cutting it into a required length by forming it into a rod shape through a known drawing process. Additionally, the insulating housing 122 can be formed by integrally molding a circular insulating shade onto a rod molded to a certain thickness on the outer peripheral surface of the FRP rod 121 by injection molding. In addition, a plurality of attached insulator shades are formed with the same size, and instead of reducing the size of the insulator shades, the number of installations is increased whenever possible and arranged in an appropriate number to form insulation.

In this way, when Teflon (fluoropolymer), which has excellent heat resistance, chemical resistance, non-adhesion, low friction coefficient, and flame retardancy, is applied as the outer covering of the FRP rod 121 other than the insulator shade portion, the surface is smooth and pollutants are reduced. Even though it is attached and adhered, it can be easily removed for cleaning.

In addition, in the present invention, Teflon and rubber insulators can be attached with a high-performance adhesive by surface treatment (etching, primer treatment, etc.) of the Teflon at the area (groove area) where the insulator shade is attached, thereby maintaining the advantages of Teflon while maintaining the Teflon surface. It is possible to solve the problem of not being able to easily attach insulator shades such as rubber.

Therefore, according to the present invention, when contaminants in the tunnel accumulate in the bracket insulator portion, the contaminants can be easily removed during cleaning due to the non-adhesiveness and low friction coefficient unique to Teflon.

Next, the bracket support pipe 130 is connected to one side of the support insulator 120, and the support pipe 110 is connected to the other side. At this time, with the bracket support pipe 130 and the support pipe 110 assembled on both sides of the FRP rod 121, they can be manufactured by pressing them with a pressing tool such as a die or fixing the assembled state by adhering with an adhesive. there is.

Referring to FIGS. 6B and 3, a rigid tram line (30) made of a rigid body that fixes the tram line and the tram line in contact with the pantograph-type tram current collector (20), and 2 on both sides installed on the tunnel wall (50) or the ground. Two supports 140 are provided. At this time, the R-bar method may be applied to the rigid tramline 30, which is made of a tramline and a rigid body that fixes the tramline. In addition, a clamp 40 connecting the rigid catenary 30 and the support brackets provided on the first and second supports 140 may be further formed.

At this time, the support 140 is in the form of a support bolt and is provided with a through bolt 141 that penetrates and couples the first and second insertion holes 132a and 132b of the bracket support pipe 130, and the through bolt 141 ) is combined with the nut 143 and integrally fixed to the bracket support pipe 130. At this time, the through bolt 141 is inserted through the first and second support pipe holes 132a and 132b and fastened and fixed by tightening the nut 143, and a washer 142 is inserted between the nuts 143. ) can be combined to protect the contact surface or prevent the nut from loosening to increase fixing force.

Additionally, the support pipe 110 and the support insulator 120 may be formed integrally. For example, a polymer insulator is formed by injection molding an insulating housing 122 of silicone rubber onto a FRP (Fiber Reinforced Plastics) rod 121. Next, one side of the manufactured polymer support insulator 120 is inserted into the support pipe 110 and then pressed. Next, the other side of the polymer support insulator 120 is inserted into the bracket support pipe 130 and then pressed.

At this time, one side of the FRP rod 121 into which the O-ring (not shown) is inserted is inserted into the support pipe 110 and connected to each other, and the other side is inserted into the bracket support pipe 130 and connected to each other. That is, the right end of the FRP rod 121 is inserted into the hollow part of the support pipe 110, fitted, and pressed together, and the left end of the FRP rod 121 is inserted into the hollow part of the bracket support pipe 130, fitted, and pressed together. are combined.

At this time, sealant is applied to the joint interface to be pressed and joined. This sealing can prevent moisture or foreign substances from penetrating into the joint interface.

Additionally, referring to FIG. 6A, the bracket support pipe 130 may form a structure in which the middle of the bracket support pipe 130 is closed by forming a partition wall 131 in the hollow portion of the support pipe. That is, the hollow part of the support pipe is separated into two hollow parts through the internal partition, the hollow part on one side is coupled to the FRF rod 121, and the hollow part on the other side has first and second insertion holes 132a and 132b formed above and below in a straight line. The through bolt 141 of the support 140 is inserted and the washer 142 and nut 143 are fastened to the through bolt 141. At this time, moisture penetration can be prevented through the internal partition wall structure of the hollow part.

Additionally, the connection between the support pipe 110 and the support insulator 120 may be manufactured using an investment casting method so that each can be formed as a single piece.

In this way, precision casting is produced using investment casting or lost wax casting. In this way, there is an effect of improving the welded connection structure by being manufactured using precision casting. Accordingly, when manufactured through existing welding, it is possible to compensate for the disadvantage of weakening durability due to stress corrosion cracking caused by residual stress existing in the weld zone.

In addition, it can have durability against repetitive loads and vibrations applied to the rigid catenary bracket.

In addition, since no deposited metal is generated during the welding operation, the weight of the bracket 100 is reduced and the supporting load is reduced, so that the bracket 100 can be stably fixed to the support 140.

Next, the bolts of the support 140 are inserted into the first and second insertion holes 132a and 132b of the bracket support pipe 130 and assembled. At this time, the first and second insertion holes 132a and 132b have a circular structure into which the through bolt 141 is inserted.

Figure 7 is a diagram showing another type of bracket support pipe 230 in the rigid catenary bracket structure according to an embodiment of the present invention.

Referring to FIG. 7, the bracket support pipe 230 can also be configured in the form of a clevis metal fitting.

Figures 8 to 11 are diagrams showing a rigid catenary bracket to which a tilt adjustment structure is applied according to another embodiment of the present invention.

Referring to FIGS. 8A to 11, the rigid catenary bracket according to another embodiment of the present invention is different from the rigid catenary bracket structure of FIGS. 2 to 7 described above in that the inclination adjustment structure is applied, and the existing structure is Since they are the same, the explanation will focus on this tilt adjustment structure.

Referring to Figures 8 and 9, Figures 8a and 9a show the structure of the rigid catenary bracket 100 described above, and the first and second insertion holes 132a and 132b of the bracket support pipe 130 are circular. It has a structure, and through bolts 141 are inserted into the first and second insertion holes 132a and 132b. At this time, the bracket support pipe 130 is divided into two hollow parts through the internal partition 131, the hollow part on one side is coupled to the FRF rod 121, and the hollow part on the other side has first and second insertion holes formed at the top and bottom in a straight line. The through bolt 141 of the support 140 is inserted into (132a, 132b) and fastened to the through bolt 141 by tightening the washer 142 and the nut 143.

On the other hand, Figures 8b and 9b are diagrams showing a rigid catenary bracket structure to which a tilt adjustment structure is applied.

First, referring to FIG. 8B, the first and second tilt adjustment holes 332a and 332b of the second bracket support pipe 330 have an oval cross-section and are similar to those of the rigid catenary bracket 100 of FIG. 8A. It is different from having a circular cross section.

In addition, referring to Figure 9b, a through bolt 141 is inserted into the first and second tilt adjustment holes 332a and 332b of the second bracket support pipe 330, and a spherical washer 342 and nut 143 It is fastened to the through bolt (141) through tightening. At this time, compared to the rigid catenary bracket structure 100 of FIG. 9A, when the contact surface is inclined, the through bolt 141 moves in the first and second inclination adjustment holes 332a and 332b, and the inclination adjustment washer 342 is used. It is applied to ensure that the movement of the bolt remains stable or smooth in inclined places. Here, the slope adjustment washer 342 can be implemented in the form of a spherical washer.

In addition, the through bolt 141 has a directional structure when moving in the elliptical cross section of the first and second tilt adjustment holes 332a and 332b. In other words, it should only move in the major axis direction (left and right directions) of the elliptical cross section and not move in the minor axis direction (up and down directions). For this purpose, the directional structure forms a guide jaw or guide groove with a predetermined depth along the outer peripheral surface of the long axis (left and right) direction of the elliptical cross section. At this time, the predetermined depth is preferably the same length as the through bolt 141 or less.

The rigid catenary bracket with the tilt adjustment structure applied accordingly has the advantage of enlarging the size of the insertion hole in the horizontal direction compared to the existing circular cross section by implementing the cross-section of the first and second insertion holes of the bracket support pipe into an oval shape, so that the bolt can be used in an inclined place. When moving, it is possible to expand the moving distance or space.

In addition, compared to the existing flat washer on the contact surface of the nut 143 coupled with the through bolt 14 inserted into the insertion hole of the bracket support pipe 330, the movement of the bolt at an angle through the spherical washer 342 keeps it stable or smooth.

In this way, tilt adjustment is possible through a tilt adjustment structure that combines the oval-shaped insertion holes (332a, 332b) and a spherical washer (342) on the contact surface. When the tilt is severe, unlike the existing bracket structure, the tilt section is Movement and movement during bolt assembly can be facilitated. In other words, when applied to a slanted place unlike a regular washer by enlarging the hole size and using a spherical washer, it is attached according to the state of movement and adjusts the incline, thereby preventing a reduction in uneven wear on the tram line.

Figures 10 and 11 are diagrams explaining the effect of improving catenary wear of a rigid catenary bracket with an inclination adjustment structure compared to the existing rigid catenary bracket structure.

Figures 10a and 11a are diagrams showing the contact form of the curved section when using the existing rigid catenary bracket structure. It can be seen that uneven wear and abnormal wear of the catenary due to cant occurs in the curved section due to the lack of slope adjustment.

On the other hand, referring to Figures 10b and 11b, there is no significant difference in general sections or when the slope is not severe, but in sections with a severe slope, if a bracket capable of adjusting the slope is applied, expansion wear of the tram line is prevented and normal wear of the tram line is prevented. It can be promoted.

In the above, the present invention has been described in detail through specific examples, but this is for the purpose of explaining the present invention in detail, and the present invention is not limited thereto, and will be understood by those skilled in the art within the technical spirit of the present invention. It is clear that modification or improvement is possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

100: support bracket
110: support pipe
120: Jijiaeja
130, 330: Bracket support pipe
131: Internal bulkhead
132a, 132b, 332a, 332b: Insertion hole
140: Support
141: Through bolt
142: Washer
143: nut
342: Spherical washer

Claims (7)

In the rigid tram line support bracket structure,
a support pipe,
A support insulator connected to both sides of the support pipe,
A support fixed to the tunnel wall,
A rigid tram line support bracket structure including a bracket support pipe connecting the support and the support insulator. According to paragraph 1,
The support insulator includes a rod forming a support framework, and an insulating housing made of silicone formed by injection molding along an outer peripheral surface of the rod,
A rigid tram line support bracket structure in which the right end of the rod is inserted into the first hollow part of the support pipe, is fitted, and press-coupled, and the left end of the rod is inserted into the second hollow part of the bracket support pipe, is fitted, and press-coupled. . According to paragraph 2,
The rod is a rigid tram line support bracket structure made of FRP material. According to paragraph 2,
A rigid tram line support bracket structure forming an internal partition in the second hollow portion of the bracket support pipe. According to paragraph 1,
The support is in the form of a support bolt, and a rigid tramway support bracket structure in which a through bolt penetrates and couples the connection bracket, and the through bolt is coupled with a washer and a nut to be integrally fixed to the bracket support pipe. According to clause 5,
A rigid body forming an insertion hole into which the through bolt is coupled to the bracket support pipe, the insertion hole has a cross-section of an oval shape, and the through bolt forms a structure having directionality for movement only in the long axis direction of the oval cross-section. Tram track support bracket structure. According to clause 6,
A rigid tram line support bracket structure that forms a spherical washer on a contact surface when coupled with the through bolt in the insertion hole of the bracket support pipe.