A power supply wire tower for an electrified railway overhead contact system

Abstract

The application relates to the field of power equipment, in particular to a power supply wire tower for an electrified railway contact network, a lifting seat is vertically slidably arranged on a tower body, a fixing seat is fixedly arranged on the lifting seat, a positioning pin is transversely slidably arranged on the fixing seat, a positioning plate matched with the positioning pin is fixedly arranged on the tower body, a protruding spherical surface is arranged on one end of the positioning pin close to the positioning plate, an arc-shaped slot for clamping one end of the positioning pin is arranged on the positioning plate, a plurality of arc-shaped slots are vertically and uniformly spaced, a first spring for pushing the positioning pin into the arc-shaped slot is arranged on the fixing seat, and a locking mechanism for preventing the positioning pin from being separated from the arc-shaped slot is further arranged on the fixing seat; after the lifting seat and the cantilever are adjusted to a required height and the positioning pin is clamped into an arc-shaped slot of a corresponding height, the electromagnet is powered off, the movable column is blocked at one end far away from the positioning pin by the stopper, and the positioning pin and the movable column cannot be smoothly moved outward to a direction far away from the arc-shaped slot.

Description

Technical Field

[0001] This invention relates to the field of power equipment, and more specifically to a power supply tower for the overhead contact system of electrified railways. Background Technology

[0002] The overhead contact line towers of electrified railways are an important component of the electrified railway power supply system. The design and installation of these towers require precise calculations and planning. Parameters such as height, spacing, and structural strength must be optimized according to the specific conditions of the railway line to ensure the reliability and safety of the power supply.

[0003] To ensure the long-term stable operation of the transmission towers, regular inspections and maintenance are necessary. Inspections include visual checks for rust, deformation, and other defects; structural strength tests are also conducted to ensure the towers can withstand the load of the power supply lines. The railway overhead contact line is a power transmission line erected along the railway line to supply power to electric locomotives. The current for train operation is transmitted through the contact line above the locomotive. If the contact line loses power, or if there is poor contact between the train's pantograph and the contact line, the train's power supply will be affected.

[0004] In the prior art, utility model patent application number CN202122430750.0 discloses a railway catenary support adjustment tool, including a support frame, which is detachably connected to the top of a steel column; a pantograph support is connected to the side of the steel column; three wire wheel assemblies are provided on the support frame, and the three wire wheel assemblies are arranged in a triangular pattern; and wire ropes for connecting the pantograph support are provided on the three wire wheel assemblies.

[0005] The aforementioned railway catenary support adjustment tool, by connecting an electric or manual hoist to one end of a wire rope, can efficiently adjust the height of the pantograph support. However, the height of the pantograph support is maintained solely by the wire rope, which is prone to tensile deformation under long-term stress. This can cause changes in the height of the pantograph support, and in severe cases, the wire rope may even break, leading to the pantograph support falling and causing an accident. Improvements are needed in this area. Summary of the Invention

[0006] The purpose of this invention is to provide a power supply tower for the overhead contact system of electrified railways, which can effectively lock the height of the cantilever to solve the defects mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A power supply tower for an electrified railway overhead contact system includes a vertically arranged tower body. A lifting seat is vertically slidably mounted on the tower body. The lifting seat is raised and lowered by a steel wire rope. A cantilever for suspending power transmission lines is fixedly mounted on one side of the lifting seat. A fixed seat is fixedly mounted on the lifting seat. A positioning pin is horizontally slidably mounted on the fixed seat. A positioning plate matching the positioning pin is fixedly mounted on the tower body. One end of the positioning pin faces the positioning plate. The end of the positioning pin near the positioning plate has a protruding spherical surface. The positioning plate has an arc-shaped groove for the positioning pin to engage. Multiple arc-shaped grooves are vertically evenly spaced. The fixed seat has a first spring for pushing the positioning pin into the arc-shaped groove. The fixed seat also has a locking mechanism for preventing the positioning pin from disengaging from the arc-shaped groove.

[0008] As a further improvement, the fixing base is provided with a first mounting cavity. A through hole is provided on one side wall of the first mounting cavity, which penetrates the outer wall of the fixing base laterally. The positioning pin is movably installed in the through hole. One end of the positioning pin extends out of the first mounting cavity and is provided with the spherical surface. The other end of the positioning pin is fixedly installed with a baffle located in the first mounting cavity. The first spring is provided between the side of the baffle away from the positioning pin and the inner wall of the first mounting cavity.

[0009] As a further improvement, the locking mechanism includes a movable column fixedly installed on the side of the baffle away from the positioning pin. The movable column is coaxially arranged with the positioning pin. A sliding cavity for the movable column to enter is provided on one side wall of the first mounting cavity. A second mounting cavity is provided in the fixed seat located on the side of the sliding cavity. A metal plate is slidably installed in the second mounting cavity along the radial direction of the movable column. A stop block is fixedly installed on the side of the metal plate near the sliding cavity. A communication port for the stop block to enter is provided on the side wall of the sliding cavity. A second spring is provided between the metal plate and the inner wall of the second mounting cavity for extending one end of the stop block into the sliding cavity. When one end of the positioning pin is engaged in the arc-shaped groove, the thrust of the second spring causes one end of the stop block to extend into the sliding cavity, and the stop block prevents the movable column from moving away from the arc-shaped groove.

[0010] As a further improvement, a guide rod extending radially along the movable column is fixedly installed inside the second mounting cavity, and the metal plate is slidably mounted on the guide rod.

[0011] As a further improvement, an electromagnet for attracting the metal plate is fixedly installed on the inner wall of the second mounting cavity, and the electromagnet is located on the side of the metal plate away from the stop block.

[0012] As a further improvement, vertically extending guide rails are fixedly installed on opposite sides of the tower body, and guide wheels matching the guide rails are installed on the lifting seat.

[0013] As a further improvement, the outer circumferential surface of the guide wheel is provided with a V-shaped groove, and the guide rail matches the V-shaped groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. When it is necessary to adjust the height of the lifting seat and the cantilever, the electromagnet is energized. The electromagnet attracts the metal plate and moves it upward. The metal plate drives the stop block to move upward and out of the sliding cavity. When the lifting seat is raised or lowered, the positioning pin can move outward smoothly and get out of the arc groove, which makes it very convenient to adjust the height of the power transmission line. 2. After adjusting the lifting seat and cantilever to the required height and engaging the positioning pin in the corresponding arc groove, de-energize the electromagnet. Then, the second spring pushes the metal plate downwards, and the metal plate drives the stop block downwards into the sliding cavity. The stop block blocks the end of the movable column away from the positioning pin, preventing the positioning pin and movable column from moving smoothly outwards and away from the arc groove. This restricts the vertical movement of the lifting seat and makes the height of the lifting seat and cantilever more stable. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of the AA section; Figure 3 This is a schematic diagram of the structure of the fixing base according to an embodiment of the present invention; Figure 4 This is a top view schematic diagram of the lifting seat according to an embodiment of the present invention; Figure 5 yes Figure 4 A magnified view of part I.

[0017] In the diagram: 1-Tower body; 2-Base; 4-Column; 5-Horizontal bar; 6-Diagonal bar; 7-Lifting seat; 8-Wire rope; 9-Bracket; 10-First guide wheel; 11-Second guide wheel; 12-Connecting plate; 13-Wire rope winder; 14-Cantilever; 15-Fixed seat; 16-First mounting cavity; 17-Through hole; 18-Positioning pin; 19-Positioning plate; 20-Spherical surface; 21-Arc groove; 22-Baffle; 23-First spring; 24-Moving column; 25-Sliding cavity; 26-Second mounting cavity; 27-Metal plate; 28-Guide rod; 29-Stop block; 30-Connecting port; 31-Second spring; 32-Electromagnet; 33-Guide rail; 34-Guide wheel; 35-V-groove. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1 to 5 As shown, a power supply tower for an electrified railway contact network includes a vertically arranged tower body 1. The tower body 1 includes a base 2. Four vertically extending columns 4 are welded to the top of the base 2. The four columns 4 are arranged in a rectangular array. Horizontal bars 5 are welded between two front-to-back columns 4 and between two left-to-right columns 4. Multiple horizontal bars 5 are evenly spaced vertically. Diagonal bars 6 arranged in an X-shape are also welded between two adjacent horizontal bars 5 to improve the stability of the tower body 1.

[0020] like Figure 1 and Figure 4As shown, a lifting seat 7 is vertically slidably installed on the tower body 1. The lifting seat 7 is a square tube sleeved on the outside of the tower body 1. The lifting seat 7 is pulled up and down by a steel wire rope 8. A cantilever 14 for suspending power transmission lines is fixed to one side of the lifting seat 7 by bolts or welded on. A bracket 9 is fixed to the top of the tower body 1 by bolts or welded on. A first guide wheel 10 and a second guide wheel 11 are rotatably installed on the bracket 9. The first guide wheel 10 extends out of the side of the tower body 1, and the second guide wheel 11 is located directly above the tower body 1. A connecting plate 12 located directly below the first guide wheel 10 is fixedly installed on one side of the lifting seat 7. One end of the steel wire rope 8 is fixedly connected to the connecting plate 12. The end of the steel wire rope 8 away from the connecting plate 12 passes around the top of the first guide wheel 10 and the second guide wheel 11 in sequence and extends downward to connect to the steel wire rope winder 13. The steel wire rope winder 13 is installed on the base 2 by bolts. The wire rope 8 is wound up by the wire rope reel 13, thereby driving the lifting seat 7 to rise, or the wire rope 8 is released by the wire rope reel 13, and the lifting seat 7 descends under its own weight. In turn, the lifting seat 7 drives the cantilever 14 to rise or fall, thereby adjusting the height of the power transmission line.

[0021] like Figure 2 and Figure 3 As shown, the upper left and right sides of the lifting seat 7 are respectively fixed with bolts to the fixing seats 15. The fixing seats 15 are provided with first mounting cavities 16. The side walls of the two first mounting cavities 16 that are close to each other are respectively provided with through holes 17 that penetrate the outer wall of the corresponding fixing seats 15 laterally. A cylindrical positioning pin 18 is slidably installed in the through hole 17. The left and right sides of the tower body 1 are respectively welded with positioning plates 19 that match the positioning pins 18. The positioning plates 19 are located inside the lifting seat 7. One end of the positioning pin 18 is directly opposite the corresponding positioning plate 19. The end of the positioning pin 18 that is close to the positioning plate 19 extends out of the outside of the first mounting cavity 16 and is provided with a protruding spherical surface 20. The positioning plate 19 is provided with an arc-shaped groove 21 for the end of the corresponding positioning pin 18 with the spherical surface 20 to be inserted. Multiple arc-shaped grooves 21 are provided vertically evenly spaced.

[0022] One end of the positioning pin 18 located in the first mounting cavity 16 is integrally formed with a baffle 22. The baffle 22 can prevent the positioning pin 18 from completely disengaging from the first mounting cavity 16. A first spring 23 is provided between the side of the baffle 22 away from the positioning pin 18 and the inner wall of the first mounting cavity 16 for pushing the positioning pin 18 into the arc-shaped groove 21.

[0023] When the wire rope 8 pulls the lifting seat 7 up and down, the lifting seat 7 drives the fixed seat 15 and the positioning pin 18 to move up and down synchronously. When the lifting seat 7 moves the positioning pin 18 to align with an arc-shaped groove 21, the first spring 23 pushes the positioning pin 18 inward and causes the end of the positioning pin 18 with the spherical surface 20 to be engaged in the corresponding arc-shaped groove 21. When the lifting seat 7 continues to raise or lower the positioning pin 18, the inner wall of the arc-shaped groove 21 acts on the spherical surface 20 at the end of the positioning pin 18, which can cause the positioning pin 18 to move outward and disengage from the arc-shaped groove 21. Thus, without the obstruction of the stop block 29, the lifting seat 7 can be raised or lowered smoothly under the traction of the wire rope 8.

[0024] like Figure 3 As shown, the fixed base 15 is provided with a locking mechanism to prevent the positioning pin 18 from disengaging from the arc-shaped groove 21. The locking mechanism includes a movable column 24 integrally formed on the side of the baffle 22 away from the positioning pin 18. The movable column 24 is coaxially arranged with the positioning pin 18. The first mounting cavity 16 has a sliding cavity 25 on the side wall away from the through hole 17 for the movable column 24 to enter. The fixed base 15 above the sliding cavity 25 has a second mounting cavity 26. A metal plate 27 is slidably installed up and down along the radial direction of the movable column 24 in the second mounting cavity 26. Two guide rods 28 arranged opposite each other are fixedly installed in the second mounting cavity 26. 28 extends vertically along the radial direction of the movable column 24. The metal plate 27 is slidably mounted on the two guide rods 28. A stop block 29 is welded to the bottom of the metal plate 27. The top of the sliding cavity 25 is provided with a communication port 30 for the stop block 29 to enter. A second spring 31 is sleeved on the guide rod 28 between the top of the metal plate 27 and the top wall of the second mounting cavity 26 to allow the lower end of the stop block 29 to extend into the sliding cavity 25. When one end of the positioning pin 18 is engaged in the arc groove 21, the thrust of the second spring 31 causes the lower end of the stop block 29 to extend into the sliding cavity 25. The stop block 29 prevents the movable column 24 from moving away from the arc groove 21.

[0025] An electromagnet 32 ​​for attracting metal plate 27 is fixedly installed on the top wall of the second mounting cavity 26 by bolts. The electromagnet 32 ​​is located on the side of metal plate 27 away from the stop block 29.

[0026] Specifically, when the height of the lifting seat 7 and the cantilever 14 needs to be adjusted, the electromagnet 32 ​​is energized, and the electromagnet 32 ​​attracts the metal plate 27 to move upward. The metal plate 27 drives the stop 29 to move upward out of the sliding cavity 25. Without the blocking effect of the stop 29, the positioning pin 18 can move outward smoothly and disengage from the arc groove 21 when the lifting seat 7 is raised or lowered. Alternatively, after the lifting seat 7 and the cantilever 14 are adjusted to the required height and the positioning pin 18 is engaged in the arc groove 21 at the corresponding height, the electromagnet 32 ​​is de-energized. Then, the second spring 31 pushes the metal plate 27 downward. The metal plate 27 drives the stop 29 downward into the sliding cavity 25. The stop 29 blocks the end of the movable column 24 away from the positioning pin 18, so that the positioning pin 18 and the movable column 24 cannot move smoothly outward away from the arc groove 21, thereby restricting the up and down movement of the lifting seat 7 and making the height of the lifting seat 7 and the cantilever 14 more stable.

[0027] Vertically extending guide rails 33 are bolted to the left side of the two left columns 4 and the right side of the two right columns 4. Guide wheels 34, matching the guide rails 33, are installed on the inner sides of the left and right side walls of the lifting seat 7. The guide wheels 34 are rotatably mounted on guide wheel supports, which are bolted to the lifting seat 7. The cooperation between the guide wheels 34 and the guide rails 33 reduces the resistance to the vertical movement of the lifting seat 7.

[0028] In this embodiment, the outer circumferential surface of the guide wheel 34 is provided with a V-shaped groove 35, and the guide rail 33 is a V-shaped guide rail. The guide rail 33 matches the V-shaped groove 35, thereby improving the stability of the combination between the guide wheel 34 and the guide rail 33.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power supply tower for an electrified railway overhead contact system, characterized in that: The system includes a vertically oriented tower body, on which a lifting seat is slidably mounted vertically. The lifting seat is raised and lowered by a steel wire rope. A cantilever for suspending power transmission lines is fixedly mounted on one side of the lifting seat. A fixed seat is fixedly mounted on the lifting seat, and a positioning pin is slidably mounted laterally on the fixed seat. A positioning plate matching the positioning pin is fixedly mounted on the tower body. One end of the positioning pin faces the positioning plate. The end of the positioning pin near the positioning plate has a protruding spherical surface. The positioning plate has an arc-shaped groove for the positioning pin to engage. Multiple arc-shaped grooves are evenly spaced vertically. The fixed seat has a first spring for pushing the positioning pin into the arc-shaped groove. The fixed seat also has a locking mechanism for preventing the positioning pin from disengaging from the arc-shaped groove. The fixed base is provided with a first mounting cavity. A through hole is provided on one side wall of the first mounting cavity, which penetrates the outer wall of the fixed base laterally. The positioning pin is movably installed in the through hole. One end of the positioning pin extends out of the first mounting cavity and is provided with the spherical surface. The other end of the positioning pin is fixedly installed with a baffle located in the first mounting cavity. The first spring is provided between the side of the baffle away from the positioning pin and the inner wall of the first mounting cavity. The locking mechanism includes a movable column fixedly installed on the side of the baffle away from the positioning pin. The movable column is coaxially arranged with the positioning pin. A sliding cavity is provided on one side wall of the first mounting cavity for the movable column to enter. A second mounting cavity is provided in a fixed seat located on the side of the sliding cavity. A metal plate is slidably installed in the second mounting cavity along the radial direction of the movable column. A stop block is fixedly installed on the side of the metal plate near the sliding cavity. A communication port is provided on the side wall of the sliding cavity for the stop block to enter. A second spring is provided between the metal plate and the inner wall of the second mounting cavity for allowing one end of the stop block to extend into the sliding cavity. When one end of the positioning pin is engaged in the arc-shaped groove, the thrust of the second spring causes one end of the stop block to extend into the sliding cavity, and the stop block prevents the movable column from moving away from the arc-shaped groove. An electromagnet for attracting the metal plate is fixedly installed on the inner wall of the second mounting cavity. The electromagnet is located on the side of the metal plate away from the stop block.

2. A power supply tower for an electrified railway contact network as described in claim 1, characterized in that: A guide rod extending radially along the movable column is fixedly installed inside the second mounting cavity, and the metal plate is slidably mounted on the guide rod.

3. A power supply tower for an electrified railway contact network as described in claim 1, characterized in that: Vertically extending guide rails are fixedly installed on opposite sides of the tower body, and guide wheels matching the guide rails are installed on the lifting seat.

4. A power supply tower for an electrified railway contact network as described in claim 3, characterized in that: The outer circumference of the guide wheel is surrounded by a V-shaped groove, and the guide rail matches the V-shaped groove.

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