A circuit breaker device for traction power supply systems of electrified railways

Abstract

This invention relates to a circuit breaker device for an electrified railway traction power supply system. The circuit breaker body and current transformer are both mounted on a moving vehicle body. The operating mechanism and operating linkage mechanism of the circuit breaker are both housed in a mounting box. A flexible connection is provided between the insulating tie rod and the vacuum interrupter, connecting it to the current transformer. The operating linkage mechanism has a main crank arm and a driven crank arm on its mounting shaft. The main crank arm is driven to rotate by the operating mechanism. The driven crank arm, intermediate connecting rod, intermediate crank arm, and lifting drive arm are sequentially hinged. The first hinge shaft between the intermediate connecting rod and the intermediate crank arm is connected to a fixed shaft located within the mounting box via a tripping spring. The mounting box contains a mounting plate and a buffer. The upper end of the lifting drive arm has a lifting sliding shaft that engages with a lifting guide groove on the mounting plate. The buffer is located below the lifting drive arm. This invention is flexibly adaptable to various operating environments while ensuring reliable mechanism operation.

Description

Technical Field

[0001] This invention relates to the field of power equipment, and more specifically to a circuit breaker device for an electrified railway traction power supply system. Background Technology

[0002] The traction power supply system of electrified railways is usually quite complex and generally requires multiple circuit breakers. For example, patent CN202121323U discloses an external power supply system for an electrified railway traction substation, which is equipped with circuit breakers on the side of newly built lines, and also requires sectional circuit breakers between two busbars.

[0003] In electrified railway traction power supply systems, circuit breakers and current transformers are typically installed separately or assembled with the current transformer on an external bracket. When connected to the electrified railway traction power supply system, installation is generally inconvenient, requiring hoisting or other methods. For example, patent CN202454504U discloses a single-pole combined circuit breaker for railway traction power supply systems. The main body of the circuit breaker consists of an upper insulating cylinder, a lower insulating cylinder, and an operating mechanism. While this device reduces space requirements and has lower environmental requirements, making it suitable for use in narrow environments such as tunnels, mountain edges, and turnout groups, it is inconvenient to install and move flexibly when connected to the traction winding of the main transformer in the traction substation.

[0004] In addition, due to factors such as the external operating environment, improving the operational reliability and service life of circuit breaker mechanisms in electrified railway traction power supply systems is also an important issue that needs to be considered. However, most circuit breakers in the existing technology are used indoors, and their operating mechanisms usually directly drive the insulating pull rod through the crank arm to achieve the opening and closing operation of the vacuum arc-extinguishing chamber. This structure often cannot meet the reliability requirements of circuit breakers used in outdoor electrified railway traction power supply systems. Summary of the Invention

[0005] The purpose of this invention is to provide a circuit breaker device for traction power supply systems of electrified railways, which can be flexibly applied to various operating environments while ensuring the reliability of the mechanism's operation and service life.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A circuit breaker device for an electrified railway traction power supply system includes a moving car body, a circuit breaker body, and a current transformer, wherein both the circuit breaker body and the current transformer are mounted on the moving car body. The circuit breaker body includes an operating mechanism, an operating linkage mechanism, an insulating tie rod, and a vacuum interrupter connected in sequence. The operating mechanism and the operating linkage mechanism are both housed in a mounting box. A flexible connection is provided between the insulating tie rod and the vacuum interrupter to connect to the current transformer. Furthermore, the upper end of the vacuum interrupter is electrically connected to the incoming line, and the upper end of the current transformer is electrically connected to the outgoing line. The operating linkage mechanism includes a mounting shaft, The system comprises an intermediate connecting rod, an intermediate crank arm, and a lifting drive arm. A main crank arm and a driven crank arm are mounted on the mounting shaft. The main crank arm is driven to rotate by an operating mechanism. The driven crank arm, intermediate connecting rod, intermediate crank arm, and lifting drive arm are sequentially hinged. An insulating pull rod is driven to lift via the lifting drive arm. A first hinge shaft between the intermediate connecting rod and the intermediate crank arm is connected to a fixed shaft located within the mounting housing via a stop spring. The mounting housing contains a mounting plate and a buffer. The upper end of the lifting drive arm has a lifting sliding shaft that engages with a lifting guide groove located on the mounting plate. The buffer is located on the lower side of the lifting drive arm.

[0008] The mobile vehicle body is equipped with an insulating frame, which is located on the upper side of the mounting box. The insulating tie rod and the vacuum interrupter are both located in the insulating frame.

[0009] The insulating frame includes an upper conductive plate and a lower conductive plate. An upper insulating support column and a vacuum interrupter are provided between the upper and lower conductive plates. A lower insulating support column and an insulating tie rod are provided between the lower conductive plate and the mounting box. The upper end of the stationary conductive rod of the vacuum interrupter is electrically connected to the upper conductive plate, and the lower end of the moving conductive rod of the vacuum interrupter is connected to the insulating tie rod. The lower end of the moving conductive rod is provided with the flexible connection.

[0010] The lower end of the moving conductive rod is provided with a conductive clamp, and one side of the conductive clamp is fixedly connected to the flexible connection. The lower end of the conductive clamp is connected to the spring pressure block. The upper end of the insulating pull rod is provided with a spring receiving cavity, and a spring is provided in the spring receiving cavity. The spring pressure block is located in the spring receiving cavity and abuts against the spring. The upper end of the spring receiving cavity is provided with an insulating limiting block to prevent the spring pressure block from disengaging.

[0011] One end of the intermediate connecting rod is rotatably connected to the driven crank arm via a crank arm hinge, and the other end is rotatably connected to one end of the intermediate crank arm via a first hinge. The intermediate crank arm rotates around the central pivot, and the end of the intermediate crank arm away from the first hinge is rotatably connected to the lower end of the lifting drive arm via a second hinge.

[0012] One end of the spring is provided with a first hook that is attached to the first hinge shaft, and the other end is provided with a second hook that is attached to the spring connecting piece. The end of the spring connecting piece away from the spring is provided with a threaded connection part. The fixed shaft is provided with an adjusting bolt, and the adjusting bolt is threadedly connected to the threaded connection part.

[0013] Both ends of the lifting shaft are provided with pulleys, and the pulleys respectively cooperate with the lifting guide grooves on the corresponding side mounting plate; the lifting shaft is provided with a lifting connecting rod, the lower end of the insulating pull rod is provided with a lower connecting rod, and the lifting connecting rod is fixedly connected to the lower connecting rod; the lower end of the lifting drive arm is provided with a buffer pressure roller that cooperates with the buffer.

[0014] The mobile vehicle body is equipped with a vehicle body operating mechanism, which includes an operating handle, a linkage locking assembly, a drive rod, a connecting crank arm, and a limiting crank arm connected in sequence. The upper end of the drive rod is driven to move by the operating handle, and the drive rod transmits torque through the linkage locking assembly. The mobile vehicle body is equipped with a limiting shaft, and the connecting crank arm and the limiting crank arm are driven to rotate around the limiting shaft by the lower end of the drive rod. The electrified railway traction power supply system is equipped with a travel rail, and the travel rail is equipped with a first limiting roller and a second limiting roller through which the limiting crank arm passes.

[0015] The linkage locking assembly includes a handle crank arm, a first mounting base, a second mounting base, a first connecting plate, a drive crank arm, and a second connecting plate. The handle crank arm is located at the lower end of the operating handle. Both the first and second mounting bases are fixed to the mobile vehicle body. The first mounting base has a first rotating shaft, and the second mounting base has a second rotating shaft. The handle crank arm rotates around the first rotating shaft, and the drive crank arm rotates around the second rotating shaft. The handle crank arm is connected to the drive crank arm through the first connecting plate, and the drive crank arm is connected to the drive lever through the second connecting plate. The first mounting base has a first locking hole through which the locking pin passes.

[0016] The first mounting base is provided with a plurality of first locking holes for adjusting the angle of the handle crank arm, the drive crank arm is provided with a plurality of adjustment mounting holes, and the second connecting plate is fixed to any one of the adjustment mounting holes by bolts.

[0017] The advantages and positive effects of this invention are as follows:

[0018] 1. This invention sets up the circuit breaker body and current transformer on a mobile vehicle body, which can be flexibly applied to various operating environments. At the same time, the operating mechanism controls the raising and lowering of the insulating rod through the operating linkage mechanism to realize the opening and closing action of the vacuum interrupter. The operating linkage mechanism uses the driven crank arm, intermediate link, intermediate crank arm and lifting drive arm to convert the rotational motion of the main crank arm into the raising and lowering motion of the insulating rod. This can ensure that the vacuum interrupter, as the core component of the circuit breaker body, can achieve precise, low-loss and highly consistent opening and closing operation, thereby ensuring the operational reliability and service life of the entire circuit breaker body.

[0019] 2. In the operating linkage mechanism of the present invention, the first hinge shaft between the intermediate connecting rod and the intermediate crank arm is connected to the fixed shaft in the mounting box through the opening spring. The energy released by the opening spring can act on the intermediate crank arm, thereby pulling down the insulating rod through the lifting drive arm to realize the opening action of the vacuum interrupter. In addition, since the opening spring acts directly on the intermediate crank arm, its energy is almost directly used for the downward action of the moving conductive rod of the vacuum interrupter. This can provide a higher initial acceleration, thereby making the opening process of the vacuum interrupter faster, which is beneficial to shorten the opening time. At the same time, it also reduces the key connection load of the mounting shaft with the main crank arm and the driven crank arm, so that its main function is only focused on closing and position holding, thereby improving the mechanical life and reliability of the mechanism.

[0020] 3. In the operating linkage mechanism of the present invention, one end of the opening spring is connected to the fixed shaft inside the housing through the opening spring connector. The front end of the opening spring connector is provided with a threaded connection part, and the fixed shaft is provided with an adjusting bolt. The adjusting bolt is threadedly connected to the threaded connection part. Tightening the adjusting bolt can precisely adjust the preload of the opening spring, which can ensure that the energy provided by the opening spring can ensure the opening action of the vacuum interrupter.

[0021] 4. Unlike traditional methods that use a buffer design at the mounting shaft where the main crank arm and driven crank arm are located, this invention provides a buffer below the lifting drive arm. This effectively absorbs the remaining kinetic energy and impact force at the end of the vacuum interrupter's opening, ensuring a smooth, non-jumping stop and thus protecting the entire operating mechanism and the vacuum interrupter's reliable opening. Furthermore, this invention directly buffers the intermediate crank arm and lifting drive arm during the movement process, rather than addressing the issue at the mounting shaft. This significantly reduces the mechanical stress of the entire operating mechanism, thereby improving its reliability and lifespan.

[0022] 5. In the operating linkage mechanism of the present invention, the upper end of the lifting drive arm is provided with a lifting slide shaft, and both ends of the lifting slide shaft are provided with pulleys that cooperate with the lifting guide slide grooves on the corresponding side mounting plates to slide. The above structure can ensure that the upper end of the lifting drive arm can be lifted vertically, thereby ensuring that the insulating pull rod can be lifted vertically. At the same time, the cooperation between the pulleys and the lifting guide slide grooves can also reduce the moving resistance of the lifting drive arm and ensure its smooth movement.

[0023] 6. The present invention integrates the operating mechanism and the operating linkage mechanism into the mounting box on the moving car body. At the same time, the present invention provides an insulating frame on the upper side of the mounting box, and integrates the vacuum interrupter and the insulating tie rod into the insulating frame. The current transformer is located on one side of the insulating frame. The entire structure is compact and occupies relatively little space. It also facilitates the connection of the incoming and outgoing ends to the electrified railway traction power supply system.

[0024] 7. The insulating frame of the present invention includes an upper conductive plate, an upper insulating support column, a lower conductive plate and a lower insulating support column arranged sequentially from top to bottom. Its assembly method is clear in layers and orderly connected, which can meet the installation and opening and closing operation requirements of the vacuum interrupter and the insulating tie rod, and also facilitates disassembly, maintenance and repair.

[0025] 8. The mobile car body of the present invention is provided with a car body operating mechanism to achieve reliable locking, thereby ensuring a reliable connection with the electrified railway traction power supply system. The limiting crank arm in the car body operating mechanism can ensure reliable locking with the travel track, and the linkage locking component in the car body operating mechanism can ensure reliable locking of the operating handle. This can effectively prevent the mobile car body from being disconnected from the electrified railway traction power supply system due to movement or other reasons.

[0026] 9. In the vehicle body operating mechanism of the present invention, the handle crank arm and the drive crank arm in the linkage locking assembly can be adjusted in angle according to actual needs. This allows for linkage adjustment of the angle of the final limit crank arm, ensuring that the limit crank arm is locked between the first limit roller and the second limit roller on the travel track, and that the limit crank arm moves and is limited by the movement of the second limit roller after it is lifted. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 for Figure 1 The left view of the present invention,

[0029] Figure 3 for Figure 1 A schematic diagram of the circuit breaker body.

[0030] Figure 4 for Figure 3 Enlarged view of point A in the image.

[0031] Figure 5 for Figure 3 Enlarged view of point B in the image.

[0032] Figure 6 for Figure 5 Top view of the central control linkage mechanism.

[0033] Figure 7 for Figure 6 KK view in

[0034] Figure 8 for Figure 5 Enlarged schematic diagram of the lifting guide slide.

[0035] Figure 9 for Figure 1 A schematic diagram of the CRRC gymnastics mechanism.

[0036] Figure 10 for Figure 9 Enlarged view of point C in the image.

[0037] Figure 11 for Figure 9 A schematic diagram of the open state of the CRRC gymnastics mechanism.

[0038] Among them, 1 is a vacuum interrupter, 101 is a moving conductive rod, 102 is a conductive clamp, and 103 is a spring block; 2 is an insulating frame, 201 is an upper conductive plate, 202 is an upper insulating support column, 203 is a lower conductive plate, 204 is a lower insulating support column, and 205 is an insulating bracket; 3 is an insulating pull rod, 301 is a spring, 302 is a lower connecting rod, and 303 is an insulating limit block; 4 is an operating linkage mechanism, 401 is a main crank arm, 402 is a mounting shaft, and 40... 3 is the driven crank arm, 404 is the intermediate connecting rod, 405 is the intermediate crank arm, 406 is the lifting drive arm, 4061 is the lifting slide shaft, 4062 is the pulley, 4063 is the buffer pressure roller, 407 is the opening spring, 408 is the opening spring connector, 4081 is the threaded connection, 409 is the fixed shaft, 4091 is the adjusting bolt, 410 is the buffer, 411 is the first hinge shaft, 412 is the intermediate rotating shaft, 413 is the second hinge shaft, and 414 is the lifting connecting rod. 415 is the mounting plate; 4151 is the lifting guide slide; 5 is the operating mechanism; 6 is the current transformer; 7 is the moving vehicle body; 8 is the vehicle body operating mechanism; 801 is the operating handle; 802 is the handle crank arm; 8021 is the first connecting shaft; 803 is the first mounting base; 8031 ​​is the first rotating shaft; 8032 is the first locking hole; 804 is the second mounting base; 8041 is the second rotating shaft; 805 is the first connecting plate; 806 is the drive crank arm; 80 61 is the second connecting shaft, 8062 is the adjusting mounting hole, 807 is the second connecting plate, 808 is the drive tie rod, 8081 is the upper hinge shaft, 8082 is the lower hinge shaft, 809 is the connecting crank arm, 810 is the limiting rotating shaft, 811 is the limiting crank arm, 812 is the travel track, 8121 is the first limiting roller, 8122 is the second limiting roller; 9 is the supporting insulator; 10 is the inlet end; 11 is the insulating support column; 12 is the outlet end; 13 is the flexible connection.

[0039] Specific implementation party

[0040] The invention will now be described in further detail with reference to the accompanying drawings.

[0041] like Figures 1-2 As shown, the present invention includes a mobile vehicle body 7, a circuit breaker body, and a current transformer 6, wherein both the circuit breaker body and the current transformer 6 are mounted on the mobile vehicle body 7; as Figures 3-8 As shown, the circuit breaker body includes an operating mechanism 5, an operating linkage mechanism 4, an insulating pull rod 3, and a vacuum interrupter 1 connected in sequence. The operating mechanism 5 and the operating linkage mechanism 4 are both housed in a mounting box. A flexible connection 13 connects the insulating pull rod 3 and the vacuum interrupter 1 to a current transformer 6. Additionally, as shown... Figure 1 As shown, the upper end of the vacuum interrupter 1 is electrically connected to the incoming terminal 10, and the upper end of the current transformer 6 is electrically connected to the outgoing terminal 12; Figures 5-8As shown, the operating linkage mechanism 4 includes a mounting shaft 402, an intermediate connecting rod 404, an intermediate crank arm 405, and a lifting drive arm 406. The mounting shaft 402 is equipped with a main crank arm 401 and a driven crank arm 403. The main crank arm 401 is driven to rotate by the operating mechanism 5, thereby causing the mounting shaft 402 and the driven crank arm 403 to rotate together. The driven crank arm 403, the intermediate connecting rod 404, the intermediate crank arm 405, and the lifting drive arm 406 are sequentially hinged. Figures 5-6 As shown, the first hinge pin 411 between the intermediate connecting rod 404 and the intermediate crank arm 405 is connected to the fixed shaft 409 located in the mounting housing via a stop spring 407; as Figure 5 and Figures 7-8 As shown, the mounting housing contains a mounting plate 415 and a buffer 410. The upper end of the lifting drive arm 406 is slidably connected to the mounting plate 415, and the buffer 410 is located on the lower side of the lifting drive arm 406. In this embodiment, the buffer 410 is an oil buffer, which is a commercially available product.

[0042] like Figure 1 and Figure 3 As shown, in this embodiment, the mobile vehicle body 7 is provided with an insulating frame 2, and the insulating frame 2 is located on the upper side of the mounting box. The insulating pull rod 3 and the vacuum interrupter 1 are both located in the insulating frame 2. Additionally, as shown... Figure 1 As shown, the mobile vehicle body 7 is equipped with a supporting insulator 9 connected to the upper end of the insulating frame 2. The supporting insulator 9 mainly serves to strengthen and ensure the stability of the insulating frame 2. The current transformer 6 is equipped with an insulating support column 11 on its upper side. The electrical connection plate between the upper end of the vacuum interrupter 1 and the air inlet 10 is supported by the insulating support column 11. Figure 2 As shown, the mobile vehicle body 7 has a panel on one side, and the panel can be equipped with corresponding operation buttons (such as trip button, close button) and indicator lights (such as trip indicator light, close indicator light, energy storage indicator light, etc.) as needed.

[0043] like Figure 1 and Figures 3-4As shown, in this embodiment, the insulating frame 2 includes an upper conductive plate 201 and a lower conductive plate 203. An upper insulating support column 202 and a vacuum interrupter 1 are provided between the upper conductive plate 201 and the lower conductive plate 203. The vacuum interrupter 1 is located between each of the upper insulating support columns 202. A lower insulating support column 204 and an insulating tie rod 3 are provided between the lower conductive plate 203 and the mounting box. The insulating tie rod 3 is located between each of the lower insulating support columns 204. The upper end of the stationary conductive rod of the vacuum interrupter 1 is electrically connected to the upper conductive plate 201. The lower end of the moving conductive rod 101 of the vacuum interrupter 1 is connected to the insulating tie rod 3. The lower end of the moving conductive rod 101 is provided with the flexible connection 13. Additionally, as shown... Figure 3 As shown, an insulating support 205 is provided on one side of the lower conductive plate 203, and the flexible connection 13 extends from the insulating support 205 to the outside of the insulating frame 2. The vacuum interrupter 1 is a technology known in the art, for example, see patents such as CN204577322U.

[0044] like Figure 4 As shown, in this embodiment, the lower end of the moving conductive rod 101 is provided with a conductive clamp 102, and one side of the conductive clamp 102 is fixedly connected to the flexible connection 13. The lower end of the conductive clamp 102 is connected to the spring pressure block 103 by bolts. The upper end of the insulating pull rod 3 is provided with a spring receiving cavity, and a spring 301 is provided in the spring receiving cavity. The spring pressure block 103 is located in the spring receiving cavity and abuts against the spring 301. The upper end of the spring receiving cavity is provided with an insulating limiting block 303 to prevent the spring pressure block 103 from disengaging. In this embodiment, the spring 301 is an overtravel spring, which can ensure reliable closing of the vacuum interrupter.

[0045] like Figure 5 As shown, in this embodiment, the operating mechanism 5 is a spring-operated mechanism, which is existing technology; for example, see the mechanism in patents such as CN202585163U. Furthermore, in this embodiment, both the main crank arm 401 and the driven crank arm 403 are mounted on a single crank arm bushing, which is mounted on the mounting shaft 402, and the crank arm bushing and the mounting shaft 402 are in a spline fit.

[0046] like Figure 5 As shown, in this embodiment, one end of the intermediate connecting rod 404 is rotatably connected to the driven crank arm 403 via a crank arm hinge, and the other end is rotatably connected to one end of the intermediate crank arm 405 via a first hinge 411. The intermediate crank arm 405 rotates around the central pivot 412, and the other end of the intermediate crank arm 405 is rotatably connected to the lower end of the lifting drive arm 406 via a second hinge 413. Figure 7As shown, the mounting box is provided with two mounting plates 415 inside, and the two ends of the intermediate rotating shaft 412 and the two ends of the second hinge shaft 413 are respectively mounted on the mounting plates 415 on the corresponding sides.

[0047] like Figures 5-6 As shown, the first hinge shaft 411 is connected to the fixed shaft 409 fixed in the mounting box through the opening spring 407. The opening spring 407 is used to provide power for opening the vacuum interrupter 1. When the vacuum interrupter 1 is closed (i.e., the moving conductive rod 101 rises and contacts the stationary conductive rod), the opening spring 407 is in a stretched state. When the vacuum interrupter 1 is opened, the operating mechanism 5 does not work, the main crank arm 401 automatically resets, and the energy released by the opening spring 407 directly acts on the intermediate crank arm 405, which causes the intermediate crank arm 405 to rotate and drive the lifting drive arm 406 to descend, thereby pulling down the insulating pull rod 3 to separate the moving conductive rod 101 of the vacuum interrupter 1 from the stationary conductive rod. In the above process, since the energy released by the opening spring 407 acts directly on the intermediate crank arm 405, its energy is also equivalent to being directly used in the downward action of the moving conductive rod 101 of the vacuum interrupter 1. This can provide a higher initial acceleration, thereby making the opening process of the vacuum interrupter 1 faster, which is beneficial to shorten the opening time. At the same time, it also reduces the load borne by the key connection of the mounting shaft 402, so that its function is mainly focused on the closing and position holding of the vacuum interrupter 1, thereby greatly improving the mechanical life and reliability of the entire operating mechanism.

[0048] like Figures 5-6 As shown, in this embodiment, one end of the opening spring 407 is hooked to the first hinge shaft 411 via a first hook, and the other end is hooked to the opening spring connector 408 via a second hook. The opening spring connector 408 has a threaded connection part 4081 at the end away from the opening spring 407. The fixed shaft 409 is provided with an adjusting bolt 4091, and the adjusting bolt 4091 is threadedly connected to the threaded connection part 4081. Tightening the adjusting bolt 4091 can precisely adjust the preload of the opening spring 407 to ensure that the energy provided by the opening spring 407 can complete the opening action of the vacuum interrupter 1.

[0049] like Figures 5-8As shown, in this embodiment, the mounting plate 415 is provided with a lifting guide groove 4151, the upper end of the lifting drive arm 406 is provided with a lifting shaft 4061, and both ends of the lifting shaft 4061 are provided with pulleys 4062. The pulleys 4062 respectively cooperate with the lifting guide grooves 4151 on the corresponding side of the mounting plate 415. The above structure can ensure that the upper end of the lifting drive arm 406 can be lifted vertically, thereby ensuring that the insulating pull rod 3 is pulled vertically. At the same time, the cooperation between the pulleys 4062 and the lifting guide grooves 4151 can also reduce the moving resistance and ensure that the lifting drive arm 406 moves smoothly.

[0050] like Figure 7 As shown, in this embodiment, the lifting slide shaft 4061 is provided with a lifting connecting rod 414, the lower end of the insulating pull rod 3 is provided with a lower connecting rod 302, and the lifting connecting rod 414 is fixedly connected to the lower connecting rod 302.

[0051] like Figure 5 and Figure 7 As shown, in this embodiment, the lower end of the lifting drive arm 406 is provided with a buffer pressure roller 4063. During opening, the lifting drive arm 406 is driven to fall by the intermediate crank arm 405, and the buffer pressure roller 4063 contacts the buffer 410 for buffering. The buffer 410 can effectively absorb the remaining kinetic energy and impact force at the end of the opening through liquid damping, ensuring that the mechanism stops smoothly without bouncing, thereby protecting the entire operating mechanism and achieving reliable opening of the vacuum interrupter 1. In addition, this invention differs from the buffer design of the spline connection in the mounting shaft 402 in the prior art. This invention directly applies the buffer 410 to the lifting drive arm 406 and the intermediate crank arm 405 during the movement process, aiming to optimize mechanical characteristics from the process, rather than just solving the problem at the end of the mechanism. This can significantly reduce the mechanical stress of the entire operating mechanism, thereby improving the reliability and service life of the mechanism.

[0052] like Figure 1 As shown, in order to ensure a reliable connection between the present invention and the electrified railway traction power supply system, the present invention is provided with a car body operating mechanism 8 on the moving car body 7.

[0053] like Figures 9-11As shown, in this embodiment, the vehicle body operating mechanism 8 includes an operating handle 801, a linkage locking assembly, a drive rod 808, a connecting crank arm 809, and a limiting crank arm 811 connected in sequence. The operating handle 801 drives the upper end of the drive rod 808 to move via the linkage locking assembly. A limiting pivot 810 between the connecting crank arm 809 and the limiting crank arm 811 is located on the moving vehicle body 7, and the lower end of the drive rod 808 drives the connecting crank arm 809 and the limiting crank arm 811 to rotate around the limiting pivot 810. A travel rail 812 is provided at a suitable location in the electrified railway traction power supply system, and a first limiting roller 8121 and a second limiting roller 8122 are provided on the travel rail 812. When the invention is working, as... Figure 9 As shown, the limiting crank arm 811 rotates downward and inserts between the first limiting roller 8121 and the second limiting roller 8122, thereby achieving the limiting lock of the moving car body 7. At the same time, the linkage locking component achieves the limiting lock of the operating handle 801. This ensures a reliable connection between the present invention and the electrified railway traction power supply system, and prevents the connection from becoming detached due to the movement of the moving car body 7.

[0054] like Figures 9-11 As shown, in this embodiment, the linkage locking assembly includes a handle crank arm 802, a first mounting base 803, a second mounting base 804, a first connecting plate 805, a drive crank arm 806, and a second connecting plate 807. The handle crank arm 802 is located at the lower end of the operating handle 801. Both the first mounting base 803 and the second mounting base 804 are fixed to the moving vehicle body 7. The first mounting base 803 has a first rotating shaft 8031, and the second mounting base 804 has a second rotating shaft 8041. The handle crank arm 802 rotates around the first rotating shaft. When 8031 ​​rotates, the drive crank arm 806 rotates around the second rotating shaft 8041, and the handle crank arm 802 is connected to the drive crank arm 806 through the first connecting plate 805. The drive crank arm 806 is connected to the drive pull rod 808 through the second connecting plate 807. The first mounting base 803 is provided with a first locking hole 8032, and the handle crank arm 802 is provided with a second locking hole. The locking pin passes through the first locking hole 8032 and is inserted into the second locking hole, thereby locking the handle crank arm 802.

[0055] like Figure 10As shown, in this embodiment, the first mounting base 803 is provided with a plurality of first locking holes 8032 for adjusting the angle of the handle crank arm 802, wherein the locking pin passes through any one of the first locking holes 8032 and is inserted into the second locking hole; the drive crank arm 806 is provided with a plurality of adjusting mounting holes 8062, and the second connecting plate 807 is fixed to any one of the adjusting mounting holes 8062 by bolts, and each adjusting mounting hole 8062 can be used to adjust the angle of the drive crank arm 806. By adjusting the angle of the handle crank arm 802 and the angle of the drive crank arm 806, the present invention can adjust the angle of the final limiting crank arm 811 in conjunction with the angle of the first limiting roller 8121 and the second limiting roller 8122, ensuring that it can be inserted between the first limiting roller 8121 and the second limiting roller 8122, and simultaneously... Figure 11 As shown, when the moving vehicle body 7 inputs the travel track 12, the limiting crank arm 811 can also ensure contact and limiting with the second limiting roller 8122.

[0056] like Figure 10 As shown, in this embodiment, the shapes of the handle crank arm 802 and the drive crank arm 806 are designed according to needs. One end of the handle crank arm 802 is hinged to one end of the first connecting plate 805 via a first connecting shaft 8021, and one end of the drive crank arm 806 is hinged to the other end of the first connecting plate 805 via a second connecting shaft 8061. Additionally, as shown... Figure 9 As shown, the upper end of the drive rod 808 is hinged to the end of the second connecting plate 807 away from the drive crank arm 806 via the upper hinge shaft 8081, and the lower end of the drive rod 808 is hinged to the connecting crank arm 809 via the lower hinge shaft 8082.

[0057] The working principle of this invention is as follows:

[0058] The invention includes two types of opening and closing actions during operation: the operating mechanism 5 opens and closes, and the vacuum interrupter chamber 1 opens and closes.

[0059] During the closing process of the operating mechanism 5 (spring operating mechanism, a technology known in the art), the mounting shaft 402 in the operating linkage mechanism 4 acts as the core fulcrum. The energy released by the closing spring in the operating mechanism 5 drives the main crank arm 401 to rotate, thereby causing the driven crank arm 403, intermediate connecting rod 404, intermediate crank arm 405, and lifting drive arm 406 to move sequentially. The upper end of the lifting drive arm 406 forms a vertical upward linear motion, causing the insulating pull rod 3 to rise, thus enabling the moving conductive rod 101 in the vacuum interrupter 1 to rise and contact the stationary conductive rod for closing. For example... Figure 4As shown, the upper end of the insulating pull rod 3 is provided with a spring 301. After the moving conductive rod 101 rises and contacts the stationary conductive rod, the lifting drive arm 406 will continue to rise a certain distance, so that the spring pressure block 103 at the lower end of the moving conductive rod 101 moves relative to compress the spring 301, thereby applying a certain pressure upward to the spring 301 to ensure that the vacuum interrupter 1 closes securely. Additionally, as shown... Figures 5-6 As shown, when the vacuum interrupter 1 is closed, the opening spring 407 is stretched by the first hinge shaft 411 between the intermediate connecting rod 404 and the intermediate crank arm 405.

[0060] When the operating mechanism 5 trips, it does not affect the main crank arm 401, which automatically resets. At this time, the tripping spring 407 pulls the first hinge shaft 411, causing the intermediate crank arm 405, the lifting drive arm 406, and the insulating rod 3 to move together. The insulating rod 3 is driven to descend by the lifting drive arm 406, causing the moving conductive rod 101 of the vacuum interrupter 1 to descend and separate from the stationary conductive rod, thus achieving the tripping action of the vacuum interrupter 1. At the end of the tripping process, the lower end of the lifting drive arm 406 touches the buffer 410 for cushioning, ensuring a smooth, non-jumping stop and protecting the entire mechanism, allowing the vacuum interrupter 1 to reliably close.

[0061] Furthermore, when this invention is connected to an electrified railway traction power supply system, the operator first moves the mobile car body 7 to a suitable position, and then... Figures 9-11 As shown, the operator must first pull out the locking pin to unlock the handle crank arm 802 and the operating handle 801, and then rotate the operating handle 801 downwards to make the handle crank arm 802 rotate around the first rotating shaft 8031. At the same time, the handle crank arm 802 drives the first connecting plate 805, the driving crank arm 806, the second connecting plate 807, the driving pull rod 808, the connecting crank arm 809, and the limiting crank arm 811 to move in sequence. At this time, as shown... Figure 11 As shown, the limiting crank arm 811 is in the raised state. Then, the operator uses the locking pin to relock the handle crank arm 802, thereby locking the positions of various components of the linkage locking assembly, the drive rod 808, the connecting crank arm 809, the limiting crank arm 811, etc. Then, the operator can push the moving vehicle 7 into the travel track 812, as shown. Figure 11 As shown, the operation continues until the end of the limit crank arm 811 contacts the second limit roller 8122. Then, the operator pulls out the locking pin again to unlock the handle crank arm 802 and the operating handle 801, and lifts the operating handle 801 upwards. At this time, as shown... Figure 9As shown, the limiting crank arm 811 is inserted between the first limiting roller 8121 and the second limiting roller 8122 to lock the position of the mobile vehicle body 7. Then, the operator re-inserts the locking pin into the handle crank arm 802 to lock the entire linkage locking assembly, thereby ensuring that the entire mobile vehicle body 7 is securely locked.

[0062] like Figure 1 As shown, after the mobile car body 7 is input, the input terminal 10 on the mobile car body 7 is connected to the traction winding of the main transformer of the traction substation, and the output terminal on the mobile car body 7 is connected to the contact network along the railway line through the power supply line.

Claims

1. A circuit breaker arrangement for an electrified railway traction power supply system, characterized by: The circuit breaker includes a mobile vehicle body (7), a circuit breaker body, and a current transformer (6), wherein the circuit breaker body and the current transformer (6) are both mounted on the mobile vehicle body (7); the circuit breaker body includes an operating mechanism (5), an operating linkage mechanism (4), an insulating tie rod (3), and a vacuum interrupter (1) connected in sequence, wherein the operating mechanism (5) and the operating linkage mechanism (4) are both mounted in a mounting box, and a flexible connection (13) is provided between the insulating tie rod (3) and the vacuum interrupter (1) to connect with the current transformer (6), and the upper end of the vacuum interrupter (1) is electrically connected to the incoming line end (10), and the upper end of the current transformer (6) is electrically connected to the outgoing line end (12); the operating linkage mechanism (4) includes a mounting shaft (402), an intermediate link (404), an intermediate crank arm (405), and a lifting drive arm (406), wherein the mounting shaft (402) is provided with a main The main crank arm (401) and the driven crank arm (403) are driven to rotate by the operating mechanism (5). The driven crank arm (403), the intermediate connecting rod (404), the intermediate crank arm (405) and the lifting drive arm (406) are hinged in sequence. The insulating pull rod (3) is driven to lift by the lifting drive arm (406). The first hinge shaft (411) between the intermediate connecting rod (404) and the intermediate crank arm (405) is connected to the fixed shaft (409) in the mounting box through the opening spring (407). The mounting box is provided with a mounting plate (415) and a buffer (410). The upper end of the lifting drive arm (406) is provided with a lifting slide shaft (4061) that cooperates with the lifting guide slide groove (4151) on the mounting plate (415). The buffer (410) is located on the lower side of the lifting drive arm (406). One end of the intermediate connecting rod (404) is rotatably connected to the driven crank arm (403) via a crank arm hinge, and the other end is rotatably connected to one end of the intermediate crank arm (405) via a first hinge (411). The intermediate crank arm (405) rotates around the intermediate pivot (412) in the middle. The end of the intermediate crank arm (405) away from the first hinge (411) is rotatably connected to the lower end of the lifting drive arm (406) via a second hinge (413). The spring (407) has a first hook at one end that is attached to the first hinge (411), and a second hook at the other end that is attached to the spring hanger (408). The spring hanger (408) has a threaded connection (4081) at the end away from the spring (407). The fixed shaft (409) has an adjusting bolt (4091) and the adjusting bolt (4091) is threadedly connected to the threaded connection (4081). Both ends of the lifting shaft (4061) are provided with pulleys (4062), and the pulleys (4062) respectively cooperate with the lifting guide grooves (4151) on the corresponding side mounting plate (415); the lifting shaft (4061) is provided with a lifting connecting rod (414), the lower end of the insulating pull rod (3) is provided with a lower connecting rod (302), and the lifting connecting rod (414) is fixedly connected with the lower connecting rod (302); the lower end of the lifting drive arm (406) is provided with a buffer pressure roller (4063) that cooperates with the buffer (410).

2. The circuit breaker arrangement for an electrified railway traction power supply system according to claim 1, characterized in that: The mobile vehicle body (7) is provided with an insulating frame (2), and the insulating frame (2) is located on the upper side of the mounting box. The insulating tie rod (3) and the vacuum interrupter (1) are both located in the insulating frame (2).

3. The circuit breaker arrangement for an electrified railway traction power supply system according to claim 2, characterized in that: The insulating frame (2) includes an upper conductive plate (201) and a lower conductive plate (203). An upper insulating support column (202) and a vacuum interrupter (1) are provided between the upper conductive plate (201) and the lower conductive plate (203). A lower insulating support column (204) and an insulating tie rod (3) are provided between the lower conductive plate (203) and the mounting box. The upper end of the static conductive rod of the vacuum interrupter (1) is electrically connected to the upper conductive plate (201). The lower end of the moving conductive rod (101) of the vacuum interrupter (1) is connected to the insulating tie rod (3). The lower end of the moving conductive rod (101) is provided with the flexible connection (13).

4. The circuit breaker arrangement for an electrified railway traction power supply system according to claim 3, characterized in that: The lower end of the moving conductive rod (101) is provided with a conductive clamp (102), and one side of the conductive clamp (102) is fixedly connected to the flexible connection (13). The lower end of the conductive clamp (102) is connected to the spring pressure block (103). The upper end of the insulating pull rod (3) is provided with a spring receiving cavity, and a spring (301) is provided in the spring receiving cavity. The spring pressure block (103) is located in the spring receiving cavity and abuts against the spring (301). The upper end of the spring receiving cavity is provided with an insulating limiting block (303) to prevent the spring pressure block (103) from detaching.

5. The circuit breaker device for an electrified railway traction power supply system according to claim 1, characterized in that: The mobile car body (7) is provided with a car body operating mechanism (8). The car body operating mechanism (8) includes an operating handle (801), a linkage locking component, a drive rod (808), a connecting crank arm (809), and a limiting crank arm (811) connected in sequence. The upper end of the drive rod (808) is driven to move by the operating handle (801), and the drive rod (808) transmits torque through the linkage locking component. The mobile car body (7) is provided with a limiting shaft (810), and the connecting crank arm (809) and the limiting crank arm (811) are driven to rotate around the limiting shaft (810) by the lower end of the drive rod (808). The electrified railway traction power supply system is provided with a travel rail (812), and the travel rail (812) is provided with a first limiting roller (8121) and a second limiting roller (8122) for the limiting crank arm (811) to pass through.

6. The circuit breaker device for an electrified railway traction power supply system according to claim 5, characterized in that: The linkage locking assembly includes a handle crank arm (802), a first mounting base (803), a second mounting base (804), a first connecting plate (805), a drive crank arm (806), and a second connecting plate (807). The handle crank arm (802) is located at the lower end of the operating handle (801). The first mounting base (803) and the second mounting base (804) are both fixed to the moving vehicle body (7). The first mounting base (803) is provided with a first rotating shaft (8031), and the second mounting base (804) is provided with a first rotating shaft (8031). A second rotating shaft (8041) is provided, the handle crank arm (802) rotates around the first rotating shaft (8031), the drive crank arm (806) rotates around the second rotating shaft (8041), and the handle crank arm (802) is connected to the drive crank arm (806) through a first connecting plate (805), and the drive crank arm (806) is connected to the drive pull rod (808) through a second connecting plate (807); the first mounting base (803) is provided with a first locking hole (8032) through which the locking pin passes.

7. The circuit breaker device for an electrified railway traction power supply system according to claim 6, characterized in that: The first mounting base (803) is provided with a plurality of first locking holes (8032) for adjusting the angle of the handle crank arm (802), the drive crank arm (806) is provided with a plurality of adjustment mounting holes (8062), and the second connecting plate (807) is fixed to any one of the adjustment mounting holes (8062) by bolts.

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