Urban rail transit power supply rail expansion joint

Abstract

The utility model discloses an expansion joint for a power supply rail of urban rail transit. The device comprises a power supply rail, a bearing structure and a connecting structure, the power supply rail is fixed on the outer wall of the concrete rail through bolts; the bearing structure is arranged at one end of the power supply rail and comprises a bearing seat connected to the concrete outer wall through a bolt and a sliding groove formed in the bearing seat. An existing product is improved, a sliding groove and sliding tooth vertical sliding type structure is adopted, the sliding teeth are connected with the bottom beam in a matched mode, the spring is connected in a hung mode, the connecting plate can be always subjected to downward pulling force, and under the influence of rainwater, dust and other pollutants, the connecting plate can be prevented from falling off. The sliding teeth which are blocked in sliding can smoothly and relatively move along with the cold contraction of the power supply rail under the tension of the spring, so that the connecting plate and the power supply rail are always in a seamless and complete current receiving surface state, the probability of abnormal sound and shaking of a train on the rail is reduced, and the stable effect of seamless connection of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints, in particular to an expansion joint for a power supply rail of an urban rail transit. Background Art

[0002] The contact rail is set on both sides of the train track and is used to supply power to the train. Due to the consideration of conductivity and manufacturing cost factors, the contact rail is made of aluminum alloy. The train is equipped with a current collector. During the operation of the train, the current collector contacts the surface of the contact rail and slides along its surface. A contact rail expansion joint is installed between the two contact rails. Changes in ambient temperature or heat generated by current during operation will cause changes in the temperature of the contact rail, causing the contact rail to expand and contract; on the one hand, the contact rail expansion joint allows a certain amount of expansion and contraction to meet the thermal expansion and contraction requirements of the contact rail; on the other hand, the contact rail expansion joint provides a connection between the two contact rails to form a complete current collecting surface, allowing the current collector to pass smoothly to meet the power supply needs of the train.

[0003] The seamless power supply rail expansion joint currently used in the market adopts a trapezoidal connecting plate located in the middle of the connection point of the electric rail. When the electric rail is subjected to thermal expansion and contraction, the electric rail will squeeze or relax the trapezoidal connecting plate, so that the original horizontal gap expansion and contraction amount is changed to a vertical expansion and contraction amount. The gaps on the rails fit together and approach a seamless power supply rail. However, in actual use in an outdoor environment, pollutants such as rain and dust will affect the mechanical structure of the vertical movement of the trapezoidal connecting plate, and the ability of the trapezoidal connecting plate to move relative to the thermal expansion and contraction of the electric rail will be reduced. There will be a problem of a large gap between the trapezoidal connecting plate and the electric rail, causing abnormal noise and shaking when the train moves on the track. Utility Model Content

[0004] The purpose of the utility model is to provide an expansion joint for a power supply rail of urban rail transit to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an urban rail transit power supply rail expansion joint, comprising: a power supply rail, a bearing structure and a connecting structure; the power supply rail is fixed to the outer wall of the concrete rail by bolts; the bearing structure is provided at one end of the power supply rail, the bearing structure comprises a bearing seat connected to the concrete outer wall by bolts, a sliding groove provided inside the bearing seat, a bottom beam welded to the bottom end of the bearing seat and a first hanging ring welded to the upper surface of one end of the bottom beam; the connecting structure is provided on the sliding groove, the connecting structure comprises a sliding tooth slidably connected to the inside of the sliding groove, a connecting plate welded to one side of the sliding tooth and a second hanging ring welded to the bottom end of the sliding tooth, and a spring is hung between the first hanging ring and the second hanging ring.

[0006] By adopting the above technical scheme, through the improvement of the existing products, a vertical sliding structure of sliding grooves and sliding teeth is adopted, and a spring is hung on the connection between the sliding teeth and the bottom beam, so that the connecting plate will always be subjected to downward pulling force. Under the influence of pollutants such as rain and dust, the sliding teeth whose sliding is blocked can move relatively smoothly with the shrinkage of the power supply rail under the pulling force of the spring, so as to ensure that there is always no gap and a complete current receiving surface between the connecting plate and the power supply rail, reduce the probability of abnormal noise and shaking of the train on the track, and improve the stability effect of the device for seamless connection.

[0007] Preferably, a threaded hole is provided on the top of the bearing seat and is threadedly connected with a bolt, and the top of the sliding groove is connected with a top plate by the bolt.

[0008] By adopting the above technical solution, the top-open sliding groove is sealed with bolts and a top plate to limit the internal sliding teeth to ensure movement in the sliding groove, thereby improving the smoothness and stability of the vertical movement of the connecting plate.

[0009] Preferably, the bottom beams are provided in three groups evenly distributed at the bottom of the bearing seat, the three groups of bottom beams are all welded with first hanging rings, and the three groups of first hanging rings are all hung with springs.

[0010] By adopting the above technical solution, under the action of the three groups of first hanging rings, second hanging rings and springs, the sliding teeth can be pulled with strong force so that the connecting plate can always be pressed downward on the inclined surface at one end of the power supply rail, ensuring that the connection point is kept in a seamless state and the integrity of the current collecting surface, improving the smoothness and current stability of the train current collector moving to the connection point, and also helping the auxiliary connecting plate to move downward when the power supply rail shrinks.

[0011] Preferably, a threaded hole is provided on one side of the connection plate and is threadedly connected with a bolt, and a conductive plate is connected to one side of the connection plate by the bolt, and the inner side of the conductive plate is in contact with the outer wall of the power supply rail.

[0012] By adopting the above technical solution, dynamic electrical continuity can be achieved between the connecting plate and the power supply rail by using a conductive plate, ensuring that the connecting plate and the power supply rail can continue to be electrically connected to transmit current when a short gap current is accidentally disconnected, thereby ensuring stable output of current under different unexpected conditions to form a complete current receiving surface.

[0013] Preferably, the sliding groove and the sliding teeth are provided with two sets of relative sliding connections, and the length of the sliding teeth is smaller than the length of the sliding groove.

[0014] By adopting the above technical solution, two sets of sliding grooves and sliding teeth are used for sliding connection. When the connecting plate is subjected to a large expansion thrust, the connecting plate can be stably and smoothly moved vertically in the sliding groove along with the sliding teeth, thereby ensuring the formation of a seamless power supply rail.

[0015] Preferably, the connecting plate is made of high-strength aluminum alloy, which is the same material as the power supply rail, and the conductive plate is made of copper plate.

[0016] By adopting the above technical solution, by making the connecting plate into the same high-strength aluminum alloy material as the power supply rail, a seamless track surface can be formed, which can minimize the impact sound when the current collector passes by, and can also conduct electricity under contact to form a complete current collecting surface. At the same time, copper plates are used to make conductive plates, and their good conductivity and contact properties can conduct electricity well during vertical dynamic movement.

[0017] Preferably, the connecting plate is an inverted trapezoidal structure, the inclined surfaces on both sides of the connecting plate are tightly fitted with the inclined surface at one end of the power supply rail, and the surface of the connecting plate and the surface of the power supply rail are in the same plane.

[0018] By adopting the above technical solution and designing an inverted trapezoidal structure for the connecting plate, the connecting plate can fit tightly against the inclined surface of the power supply rail without deformation of the power supply rail, so as to form a seamless current-receiving surface to reduce the impact sound; when the power supply rail expands due to heat and squeezes the connecting plate, the connecting plate will move vertically upward, and when it contracts due to cold, the connecting plate will move vertically downward, so that the connecting plate and the power supply rail are always in tight fit, so as to ensure a low-noise and stable-speed moving state during the movement of the train.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] (1) By improving the existing products, a vertical sliding structure of sliding grooves and sliding teeth is adopted, and a spring is connected to the sliding teeth and the bottom beam, so that the connecting plate is always subjected to downward tension. Under the influence of pollutants such as rain and dust, the sliding teeth whose sliding is blocked can move relatively smoothly with the cold shrinkage of the power supply rail under the tension of the spring, so as to ensure that there is always no gap and a complete current receiving surface between the connecting plate and the power supply rail, reduce the probability of abnormal noise and shaking of the train on the track, and improve the stability of the device with seamless connection;

[0021] (2) Under the action of the three sets of first hanging rings, second hanging rings and springs, the sliding teeth can exert a strong pulling force, so that the connecting plate can always be pressed downward on the inclined surface at one end of the power supply rail, thereby ensuring that the connection point is kept free of gaps and the integrity of the current collecting surface, improving the smoothness and current stability of the train current collector moving to the connection point, and also facilitating the auxiliary connecting plate to move downward when the power supply rail shrinks;

[0022] (3) By using a conductive plate, dynamic electrical continuity can be achieved between the connection plate and the power supply rail, ensuring that the connection plate and the power supply rail can continue to be electrically connected and transmit current even if a short gap current is accidentally disconnected, thereby ensuring stable current output under different accidental conditions to form a complete current receiving surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the device of the utility model;

[0025] Figure 2 It is an exploded view of the overall structure of the device of the utility model;

[0026] Figure 3 It is an exploded diagram of the bearing structure and the connection structure of the utility model;

[0027] Figure 4 This is a rear view of the connection structure of the utility model;

[0028] Figure 5 It is a back view of the overall structure of the device of the utility model.

[0029] In the figure: 1. power supply rail; 2. bearing structure; 201. bearing seat; 202. sliding groove; 203. top plate; 204. bottom beam; 205. first hanging ring; 3. connecting structure; 301. connecting plate; 302. sliding teeth; 303. conductive plate; 304. second hanging ring; 4. spring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The following is combined with Figure 1-5 The utility model is described in further detail.

[0032] Embodiment 1

[0033] See also Figures 1 to 5The utility model provides an embodiment: an urban rail transit power supply rail expansion joint, comprising: a power supply rail 1, a bearing structure 2 and a connecting structure 3, the power supply rail 1 is fixed to the outer wall of the concrete track by bolts, the track for the train to run is a bridge formed by concrete pouring, the power supply rail 1 is fixed to the outer walls on both sides of the concrete by bolts for power supply, the bearing structure 2 is provided with one end of the power supply rail 1, the bearing structure 2 comprises a bearing seat 201 connected to the outer wall of the concrete by bolts, a sliding groove 202 opened inside the bearing seat 201, a bottom beam 204 welded to the bottom end of the bearing seat 201 and a first hanging ring 205 welded to the upper surface of one end of the bottom beam 204, the connecting structure 3 is provided on the sliding groove 202, and the connecting structure 3 comprises a sliding tooth 30 slidably connected to the inside of the sliding groove 202 2. A connecting plate 301 welded on one side of the sliding tooth 302 and a second hanging ring 304 welded on the bottom end of the sliding tooth 302, a spring 4 is hung between the first hanging ring 205 and the second hanging ring 304, and an improvement on the existing product adopts a vertical sliding structure of the sliding groove 202 and the sliding tooth 302, and the spring 4 is hung on the connection between the sliding tooth 302 and the bottom beam 204, so that the connecting plate 301 will always be subjected to a downward pulling force. Under the influence of pollutants such as rain and dust, the sliding tooth 302 whose sliding is blocked can move relatively smoothly with the cold shrinkage of the power supply rail 1 under the pulling force of the spring 4, so as to ensure that there is always a gap-free and complete current-receiving surface between the connecting plate 301 and the power supply rail 1, thereby reducing the probability of abnormal noise and shaking of the train on the track and improving the stability of the device with a gap-free connection.

[0034] Embodiment 2

[0035] See also Figures 1 to 5, a threaded hole is provided on the top of the bearing seat 201 and a bolt is threadedly connected thereto, and a top plate 203 is connected to the top of the sliding groove 202 by bolts. The sliding groove 202 with an opening at the top is sealed with bolts and the top plate 203 to limit the internal sliding teeth 302, so as to ensure that the sliding groove 202 can be moved, thereby improving the smoothness and stability of the vertical movement of the connecting plate 301. The bottom beam 204 is provided with three groups evenly distributed at the bottom of the bearing seat 201, and the three groups of bottom beams 204 are all welded with first hanging rings 205, and the three groups of first hanging rings 205 are all hung with springs 4. Under the action of the three groups of first hanging rings 205, the second hanging rings 304 and the springs 4, a strong pulling force can be applied to the sliding teeth 302, so that the connecting plate 301 can always be pressed downward to supply On the inclined surface at one end of the power rail 1, the connection point is kept in a seamless state and the integrity of the current collecting surface is ensured, the smoothness and current stability of the train current collector moving to the connection point are improved, and it is also helpful for the auxiliary connecting plate 301 to move downward when the power rail 1 shrinks. A threaded hole is opened on one side of the connecting plate 301 and a bolt is threadedly connected. One side of the connecting plate 301 is connected to a conductive plate 303 by bolts, and the inner side of the conductive plate 303 is in contact with the outer wall of the power rail 1. By using the conductive plate 303, dynamic electrical continuity can be achieved between the connecting plate 301 and the power rail 1, ensuring that the connecting plate 301 and the power rail 1 can continue to be electrically connected to transmit current in the event of a short gap current disconnection, so as to ensure the stable output of current under different accidental conditions to form a complete current collecting surface.

[0036] Embodiment 3

[0037] See also Figures 1 to 5The sliding groove 202 and the sliding teeth 302 are provided with two sets of relative sliding connections, and the length of the sliding teeth 302 is less than the length of the sliding groove 202. By using two sets of sliding grooves 202 and sliding teeth 302 for sliding connection, when the connecting plate 301 is subjected to a large expansion thrust, the connecting plate 301 can be stably and smoothly moved vertically in the sliding groove 202 along with the sliding teeth 302, thereby ensuring the formation of a seamless power supply rail 1. The connecting plate 301 is made of the same high-strength aluminum alloy material as the power supply rail 1. By making the connecting plate 301 the same high-strength aluminum alloy material as the power supply rail 1, a seamless track surface can be formed, so that the impact sound can be reduced to the greatest extent when the current collector passes by, and it can also conduct electricity under contact to form a complete current collecting surface. The material of the conductive plate 303 is made of copper plate. Conductive plate 303 is manufactured, and its good conductivity and contact properties can conduct electricity well during vertical dynamic movement. Connecting plate 301 is an inverted trapezoidal structure. The inclined surfaces on both sides of connecting plate 301 are tightly fitted with the inclined surface of one end of power supply rail 1, and the surface of connecting plate 301 and the surface of power supply rail 1 are in the same plane. By designing the connecting plate 301 with an inverted trapezoidal structure, connecting plate 301 can be tightly fitted with the inclined surface of power supply rail 1 without deformation of power supply rail 1, so that a seamless current receiving surface is formed to reduce the impact sound. When power supply rail 1 is heated and expanded to squeeze connecting plate 301, connecting plate 301 will move vertically upward, and after being cooled and contracted, connecting plate 301 will move vertically downward, so that connecting plate 301 is always tightly fitted with power supply rail 1 to ensure a low-noise and stable-speed moving state during the movement of the train.

[0038] Working principle: When in use, due to the large thermal expansion and contraction parameters of the aluminum alloy power supply rail 1, the length of the connection point at one end of the power supply rail 1 increases when it expands due to heat. Under the action of the inclined surface of the trapezoidal connecting plate 301, the connecting plate 301 and the sliding tooth 302 are forced to move vertically in the sliding groove 202 to compensate for the gap of the power supply rail 1 due to thermal expansion, ensuring that a complete seamless current-receiving surface is formed between the connection points. At the same time, the length is reduced after cold expansion and contraction. The sliding tooth 302 and the connecting plate 301 can be moved downward by their own gravity to ensure the integrity of the seamless current-receiving surface. During long-term use, the sliding resistance of the sliding groove 202 and the sliding tooth 302 will be affected by environmental pollutants. The three sets of springs 4 mounted at the bottom can be used to always provide a strong pulling force on the sliding tooth 302 to ensure that the sliding tooth 302 can normally move the connecting plate 301 with the thermal expansion and contraction of the power supply rail 1.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention.

Claims

1. An expansion joint for power supply rails of urban rail transit, characterized in that: include: A power supply rail (1), wherein the power supply rail (1) is fixed to the outer wall of the concrete track by bolts; A bearing structure (2), wherein the bearing structure (2) is provided at one end of the power supply rail (1), and the bearing structure (2) comprises a bearing seat (201) connected to the concrete outer wall by bolts, a sliding groove (202) provided inside the bearing seat (201), a bottom beam (204) welded to the bottom end of the bearing seat (201), and a first hanging ring (205) welded to the upper surface of one end of the bottom beam (204); A connecting structure (3), the connecting structure (3) being arranged on the sliding groove (202), the connecting structure (3) comprising a sliding tooth (302) slidably connected inside the sliding groove (202), a connecting plate (301) welded to one side of the sliding tooth (302), and a second hanging ring (304) welded to the bottom end of the sliding tooth (302), a spring (4) being hung between the first hanging ring (205) and the second hanging ring (304).

2. The urban rail transit power supply rail expansion joint according to claim 1, characterized in that: A threaded hole is provided on the top of the bearing seat (201) and is threadedly connected with a bolt, and a top plate (203) is connected to the top of the sliding groove (202) by means of a bolt.

3. The urban rail transit power supply rail expansion joint according to claim 1, characterized in that: The bottom beam (204) is provided with three groups evenly distributed at the bottom of the bearing seat (201), the three groups of bottom beams (204) are all welded with first hanging rings (205), and the three groups of first hanging rings (205) are all hung with springs (4).

4. The urban rail transit power supply rail expansion joint according to claim 1, characterized in that: One side of the connection plate (301) is provided with a threaded hole threadedly connected with a bolt, and one side of the connection plate (301) is connected to a conductive plate (303) by the bolt, and the inner side of the conductive plate (303) is in contact with the outer wall of the power supply rail (1).

5. The urban rail transit power supply rail expansion joint according to claim 1, characterized in that: The sliding groove (202) and the sliding tooth (302) are provided with two sets of relative sliding connections, and the length of the sliding tooth (302) is smaller than the length of the sliding groove (202).

6. The urban rail transit power supply rail expansion joint according to claim 4, characterized in that: The connecting plate (301) is made of a high-strength aluminum alloy material that is the same as the power supply rail (1), and the conductive plate (303) is made of a copper plate.

7. The urban rail transit power supply rail expansion joint according to claim 1, characterized in that: The connecting plate (301) is an inverted trapezoidal structure, the inclined surfaces on both sides of the connecting plate (301) are tightly fitted with the inclined surface at one end of the power supply rail (1), and the surface of the connecting plate (301) and the surface of the power supply rail (1) are in the same plane.

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