Steel bridge and concrete bridge connection section contact net additional line installation device

Abstract

The utility model discloses a steel bridge and concrete bridge connecting section contact net additional line installation device which comprises a supporting rod, a clamping ring, a pin shaft and a pulley. The clamping ring is U-shaped, the closed end of the clamping ring is fixed to the outer wall of the supporting rod, and through holes which are correspondingly communicated are formed in the two side walls, opposite to a U-shaped cavity, of the clamping ring. The pin shaft is arranged in the through hole in a penetrating manner; the pulley is rotationally connected to the pin shaft and is arranged in the U-shaped cavity of the clamping ring; and a gap through which an additional line penetrates is formed between the wheel surface of the pulley and the inner wall of the clamping ring. A traditional additional line support fixed installation mode is changed into a flexible suspension installation mode, the pulleys are suspended through the clamping rings, the length of the steel bridge can be changed during thermal expansion and cold contraction, the additional line can slide along the pulleys along with the length change of the steel bridge, the overhead line system additional line has enough fixed mobility, and the overhead line system additional line is convenient to install. And clamping abrasion and fatigue fracture of the overhead line system additional line caused by extra tension or extrusion on the overhead line system additional line due to temperature change are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to railway electrification technical field more specifically relates to a steel bridge and concrete bridge connecting section contact net additional line installation device. BACKGROUND

[0002] In modern transportation infrastructure construction, steel bridge is widely applied because of its high strength, large stiffness, strong spanning capacity, light weight, convenient transportation and installation, fast installation speed, easy repair and replacement, suitable for industrialized manufacturing and the like.

[0003] However, the combination part of the steel bridge and the concrete bridge is a key node, and the combination part of the steel bridge and the concrete bridge is particularly significant in thermal expansion and contraction due to the difference in material properties. This phenomenon not only directly affects the stability and durability of the railway line structure, but also directly generates additional stress on the contact net additional conductor, thereby affecting the normal operation and safety of the train.

[0004] There is a significant difference in the thermal expansion coefficient between the steel bridge and the concrete approach bridge. The thermal expansion coefficient of steel is relatively large, while the thermal expansion coefficient of concrete is relatively small, resulting in different thermal expansion and contraction behaviors of them under environmental temperature changes. The thermal expansion coefficient of steel is much larger than that of concrete, so when the temperature changes, the steel bridge part will produce greater deformation or relative displacement than the concrete approach bridge part.

[0005] The contact net additional conductor, as an important part of the rail transit system, is responsible for providing power for the train. These conductors are fixed to the bridge structure H-shaped pillar, so when the temperature rises, the steel bridge part elongates, causing the conductor sag to increase and the tension to decrease; on the contrary, when the temperature decreases, the steel bridge part shortens, the conductor sag decreases and the tension increases. The frequent changes in tension and sag make the contact net additional conductor subject to additional tension or extrusion, accelerating the wear of the conductor. Under the long-term effect, the conductor may be damaged by fatigue or even broken, seriously affecting the stability and safety of the train power supply system and the normal operation of the train.

[0006] Therefore, how to provide a device that can effectively protect the contact net additional line and prevent the conductor from being worn by the tension or extrusion caused by the change in the conductor sag under the influence of thermal expansion and contraction is a problem that needs to be solved by those skilled in the art. INVENTION CONTENTS

[0007] Therefore, the utility model provides a steel bridge and concrete bridge connecting section contact net additional line installation device, changes the traditional support fixed installation mode to adopt the flexible suspension installation mode, changes the original pre-stranded type suspension clamp to the suspension pulley, these connecting pieces can absorb the displacement and stress caused by thermal expansion and contraction to a certain extent, and reduce the direct influence on the conductor.

[0008] In order to achieve the above object, the utility model adopts the following technical scheme:

[0009] A steel bridge and concrete bridge connecting section contact net additional line installation device, including support rod, clamping ring, pin shaft and pulley,

[0010] The clamping ring is U-shaped, and the closed end is fixed to the outer wall of the support rod, and the clamping ring is provided with through holes corresponding to the two side walls of the U-shaped cavity; the pin shaft is arranged in the through hole; the pulley is rotatably connected to the pin shaft and placed in the U-shaped cavity of the clamping ring; the pulley has a gap between the wheel surface and the inner wall of the clamping ring for arranging the additional line.

[0011] The utility model discloses the beneficial effect of the technical scheme is, in the railway contact net additional line construction, the additional line is arranged in the gap between the pulley and the clamping ring U-shaped cavity, and the additional line can be carried by the pulley, and after the additional line is erected, a certain sag is reserved, when the temperature rises, the steel bridge is elongated, the line sag increases, and the tension decreases, and the line slides to the middle of the span through the pulley, when the temperature decreases, the steel bridge is shortened, the wire sag decreases, and the tension increases, and the line slides to the sliding direction, the utility model discloses can make the contact net additional wire have enough fixed activity, avoid the contact net additional line and be extruded and produce the card limit wear and tear, fatigue fracture because of the temperature change line.

[0012] Preferably, the through hole is arranged in the middle of the side wall of the pulley, and the pin shaft penetrates the through hole and the through hole in sequence to limit the pulley in the U-shaped cavity of the clamping ring. The connection between the pulley and the clamping ring is completed by the pin shaft, which is simple and reliable to install, and the pulley can rotate along the pin shaft.

[0013] Preferably, the support rod is a rectangular tube, one end of which is welded with a steel plate, and the support rod can be fixed perpendicularly to the vertical rod through the steel plate; the other end of the rectangular tube is welded with a sealing plate, and the clamping ring is arranged at one end of the rectangular tube opposite to the sealing plate. The support rod is selected as a rectangular tube, which is convenient to obtain and low in cost, and the rectangular tube has a certain flexibility, meeting the length change requirement of the steel bridge due to thermal expansion and contraction; the support rod can be fixed to the vertical rod to form a stable shoulder frame through the steel plate.

[0014] Preferably, a plurality of triangular stiffening plates are welded between the panel of the steel plate and the outer wall of the rectangular tube. The stiffening plates can improve the strength of the connecting node between the support rod and the vertical rod, and ensure the stability of the connection.

[0015] Preferably, the pulley has a groove on its surface, and the additional wire can be threaded through the groove. By accommodating the additional wire in the groove, when the steel bridge changes length due to thermal expansion and contraction, the additional wire can slide along the groove, causing the pulley to rotate. This gives the additional wire a certain degree of mobility and prevents wear on the wire caused by tension or compression due to changes in wire sag under the influence of thermal expansion and contraction.

[0016] Preferably, the clamping ring is formed by bending a steel plate as a whole.

[0017] Preferably, the length of the support rod is no more than 1m.

[0018] Preferably, the additional lines on both sides of the pulley are covered with protective lines. This ensures that the additional lines do not wear out due to friction with the pulley as they move along it.

[0019] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a contact wire installation device for the connection section between a steel bridge and a concrete bridge. It changes the traditional fixed installation method of the contact wire support to a flexible suspension installation method. Through the clamping ring suspension pulley, the length of the steel bridge will change when it expands and contracts with heat. The contact wire can slide along the pulley with the change of the length of the steel bridge, so that the contact wire has sufficient fixed mobility and avoids the contact wire from being subjected to additional tension or compression due to temperature changes, which can cause jamming wear and fatigue fracture. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 Formal drawing of the installation device provided by this utility model;

[0022] Figure 2 for Figure 1 AA side view in the middle;

[0023] Figure 3 for Figure 1 BB side view in the middle;

[0024] Figure 4 Front view of the connection between the mounting device and the shoulder frame provided by this utility model;

[0025] Figure 5 for Figure 4 CC side view in the image.

[0026] wherein,

[0027] 1 - support pole; 2 - clamping ring; 3 - pin shaft; 4 - pulley; 5 - steel plate; 6 - stiffener plate; 7 - sealing plate; 8 - anchoring hole; 9 - vertical pole; 10 - groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] The utility model embodiment discloses a kind of steel bridge and concrete bridge connecting section contact net additional line installation device, it can be used for the installation of contact net PW line and lightning conductor, including support pole 1, clamping ring 2, pin shaft 3 and pulley 4;

[0030] Clamping ring 2 is U-shaped, its closed end is fixed in the outer wall of support pole 1, and the two side walls of the U-shaped cavity of clamping ring 2 are provided with through holes corresponding to the communication; pin shaft 3 is arranged in the through hole; pulley 4 is rotatably connected to pin shaft 3 and placed in the U-shaped cavity of clamping ring 2; there is a gap between the wheel surface of pulley 4 and the inner wall of clamping ring 2 for arranging additional lines.

[0031] The traditional contact net additional line is erected by pre-stranded type suspension clamp, and in this way, the additional line is fixed and cannot slide, and will relax under heat and tighten under cold, and the displacement and stress caused by thermal expansion and cold contraction of the additional line cannot be absorbed; in the embodiment, Figure 1 and 2 As shown in the drawings, a pulley is rotatably connected in the clamping ring, and the wheel surface of the ring wheel and the inner cavity of the clamping ring are arranged with additional lines, and under the action of thermal expansion and cold contraction, the pulley will rotate and then slide along the line direction, and the displacement and stress caused by thermal expansion and cold contraction are absorbed by the sliding of the additional lines, reducing the direct impact of steel bridge thermal expansion and cold contraction on the additional lines.

[0032] In order to further optimize the above technical solutions, a through hole is formed in the middle of the side wall of pulley 4, and pin shaft 3 penetrates through the through hole and the through hole in sequence to limit pulley 4 in the U-shaped cavity of clamping ring 2. The pin shaft is an open pin, and after the pin shaft is butt-jointed with the clamping ring and the pulley, the fastening can be completed by the nut and the open pin, which is simple and convenient to install.

[0033] In order to further optimize the above technical solutions, the support pole 1 is a rectangular tube, one end of which is welded with a steel plate 5, and the support pole 1 can be fixed perpendicularly with the vertical pole 9 through the steel plate 5; the other end of the rectangular tube is welded with a sealing plate 7, and the clamping ring 2 is arranged at one end of the rectangular tube opposite to the sealing plate 7.

[0034] As shown in Figure 4 and 5 The support rod is selected as a rectangular tube, which is light in weight but has sufficient bearing capacity, and is low in cost. One end of the rectangular tube is fixed with the column, and the column is also selected as a rectangular tube. The rectangular tube and the column form a shoulder frame. In the actual construction process, four positioning points are selected at both ends of the combination part of the steel bridge and the concrete approach bridge, and four columns are installed. By setting four groups of wheel changing, the additional line can slide between the combination part of the steel bridge and the concrete bridge, so as to prevent the abrasion of the line caused by the tension or extrusion of the line caused by the change of the line sag under the influence of thermal expansion and cold contraction.

[0035] At the same time, a regular monitoring and maintenance mechanism is established to regularly inspect and maintain the combination part of the steel bridge and the concrete approach bridge and the additional line of the catenary. The deformation and damage caused by thermal expansion and cold contraction are found and treated in time to ensure the long-term stable operation of the bridge structure and the catenary system.

[0036] In order to further optimize the above technical scheme, ensure the long-term stability of the connecting node between the support column and the column, and improve the connecting rigidity, a plurality of triangular stiffening plates 6 are welded between the panel of the steel plate 5 and the outer wall of the rectangular tube.

[0037] In order to further optimize the above technical scheme, ensure the stability of the additional line installation and the movement caused by the thermal expansion and cold contraction of the steel bridge, a groove 10 is opened on the wheel surface of the pulley 4, and the additional line can be arranged in the groove 10.

[0038] In this embodiment, the clamp ring 2 is formed by bending a steel plate as a whole. The support rod and the clamp ring, the outer periphery of the pulley are galvanized for corrosion protection, so as to ensure the service life.

[0039] In order to further optimize the above technical scheme, ensure that the support rod meets the installation requirements of the catenary, the length of the support rod 1 is not more than 1m.

[0040] In order to further optimize the above technical scheme, ensure that the additional line will not be abraded and broken due to friction between the additional line and the pulley when the additional line moves frequently along the pulley, the additional line on both sides of the relative pulley 4 is coated with a wire protection strip.

[0041] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts of each embodiment can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the related parts can be referred to the method part.

[0042] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for installing additional contact wires in the connection section between a steel bridge and a concrete bridge, characterized in that, It includes a support rod (1), a clamping ring (2), a pin (3), and a pulley (4); The clamping ring (2) is U-shaped, and its closed end is fixed to the outer wall of the support rod (1). The clamping ring (2) has corresponding through holes on both sides of its U-shaped cavity. The pin (3) passes through the through hole. The pulley (4) is rotatably connected to the pin (3) and placed in the U-shaped cavity of the clamping ring (2). There is a gap between the wheel surface of the pulley (4) and the inner wall of the clamping ring (2) for passing through additional wires.

2. The additional contact wire installation device for the connection section between a steel bridge and a concrete bridge according to claim 1, characterized in that, The pulley (4) has a through hole in the middle of its side wall. The pin (3) passes through the through hole and the through hole in sequence to restrict the pulley (4) in the U-shaped cavity of the clamping ring (2).

3. The device for installing additional contact wires in the connection section between a steel bridge and a concrete bridge according to claim 1, characterized in that, The support rod (1) is a rectangular tube with a steel plate (5) welded to one end of the tube. The support rod (1) can be vertically fixed to the upright (9) through the steel plate (5). A sealing plate (7) is welded to the other end of the rectangular tube. The clamping ring (2) is located at one end of the rectangular tube opposite to the sealing plate (7).

4. The additional contact wire installation device for the connection section between a steel bridge and a concrete bridge according to claim 3, characterized in that, Multiple triangular stiffening plates (6) are welded between the face of the steel plate (5) and the outer wall of the rectangular tube.

5. The additional contact wire installation device for the connection section between a steel bridge and a concrete bridge according to claim 1, characterized in that, The pulley (4) has a groove (10) on its surface, and the additional line can be threaded through the groove (10).

6. The additional contact wire installation device for the connection section between a steel bridge and a concrete bridge according to claim 1, characterized in that, The clamping ring (2) is formed by bending a steel plate as a whole.

7. The device for installing additional contact wires in the connection section between a steel bridge and a concrete bridge according to claim 1, characterized in that, The length of the support rod (1) is no more than 1m.

8. The additional contact wire installation device for the connection section between a steel bridge and a concrete bridge according to any one of claims 1 to 7, characterized in that, The additional lines on both sides of the pulley (4) are covered with protective lines.

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