Electrified railway main line high-voltage alternating current bipolar grounding device

Abstract

The application discloses electrified railway main line high-voltage alternating current bipolar grounding device, including control box, mounting seat, knife gap cabinet body, two static contact components, two dynamic contact components and drive assembly, electrified railway main line is provided with steel rail, column, contact network and positive feed line, steel rail is laid on the ground, column is fixed on the ground, contact network and positive feed line are fixedly installed on the column, control box is fixedly installed on the column, mounting seat is fixedly installed on the column, mounting seat both sides are respectively fixed with static contact component, knife gap cabinet body is fixedly installed on mounting seat, two dynamic contact components are respectively rotationally arranged on the outside of knife gap cabinet body, drive assembly is further fixedly arranged in the inside of knife gap cabinet body, drive assembly is electrically connected with control box, part of structure of drive assembly further extends outside of knife gap cabinet body and is respectively in transmission connection with two dynamic contact components, so as to drive two dynamic contact components to contact or separate corresponding static contact component. The technical scheme simplifies the installation process of the grounding device, and improves the construction efficiency.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a high-voltage AC double-pole grounding device for electrified railway mainlines. Background Technology

[0002] Before maintenance on rail transit, grounding is usually required to completely eliminate residual voltage and ensure the safety of workers. However, in some areas, the 27.5kV high-voltage AC lines of electrified railway mainlines still rely on manual connection of grounding wires. Due to the long mainline and harsh outdoor working environment, manual operation requires a significant amount of time to transport equipment and is impossible in extreme weather conditions such as rain and snow, resulting in a significant reduction in maintenance efficiency.

[0003] Existing technologies improve maintenance efficiency by upgrading and modifying grounding devices. This involves adding a control box below the grounding device, integrating the drive mechanism and control electronics within the box, and using a linkage to connect the drive mechanism to the moving contact of the grounding device above. However, this modification requires precise matching of the relative positions of the moving contact and the drive mechanism within the control box during construction to complete the linkage installation and transmission connection. This significantly increases the complexity of the project and severely impacts the upgrade and modification of the grounding device. Utility Model Content

[0004] The main purpose of this application is to provide a high-voltage AC bipolar grounding device for electrified railway main lines. It aims to improve the existing grounding devices, which require precise matching of the relative positions of the moving contact and the drive mechanism inside the control box to complete the linkage installation and transmission connection, thus reducing the complexity of the project.

[0005] To achieve the above objectives, this application proposes a high-voltage AC bipolar grounding device for electrified railway mainlines. The electrified railway mainline includes rails, posts, contact wires, and positive feeders. The rails are laid on the ground, the posts are fixed to the ground, and the contact wires and positive feeders are both fixedly installed on the posts. The high-voltage AC bipolar grounding device for electrified railway mainlines includes a control box, a mounting base, a switch cabinet, two stationary contact assemblies, two moving contact assemblies, and a drive assembly.

[0006] The control box is fixedly installed on the column, and the mounting base is fixedly installed on the column and located above the control box. The stationary contact assemblies are fixed on both sides of the mounting base. The two stationary contact assemblies are respectively used to connect to the contact wire and the positive feeder conductor. The switch cabinet is fixedly installed on the mounting base. Two moving contact assemblies are rotatably arranged on the outside of the switch cabinet. Both moving contact assemblies are used to connect to the rail conductor. The drive assembly is also fixedly installed inside the switch cabinet. The drive assembly is electrically connected to the control box.

[0007] Part of the drive assembly extends out of the switch cabinet and is connected to the two moving contact assemblies to drive the two moving contact assemblies to contact or separate from the corresponding stationary contact assemblies, so that the moving contacts of the two moving contact assemblies respectively perform opening and closing movements with the stationary contacts of the corresponding stationary contact assemblies.

[0008] In some embodiments of this application, the drive assembly includes a drive element and a transmission structure. The transmission structure is fixedly installed inside the knife switch cabinet. A portion of the transmission structure extends out of the outside of the knife switch cabinet and is connected to the two moving contact assemblies. The drive element is detachably and fixedly installed inside the knife switch cabinet and is also connected to the transmission structure.

[0009] In some embodiments of this application, the transmission structure includes two rotating shafts and two gears. Both rotating shafts are rotatably mounted on the knife switch cabinet and partially extend out of the outside of the knife switch cabinet to be transmittedly connected to the corresponding moving contact assembly. Any one of the rotating shafts is transmittedly connected to the driving component. The two gears are respectively mounted on the two rotating shafts and the two gears mesh with each other, so that the two moving contact assemblies rotate synchronously. The moving contact assembly has a closed position that is in contact with the stationary contact assembly and a closed position that is separated from it.

[0010] In some embodiments of this application, a controller and a position detection component are also included. The position detection component is fixedly installed and emits detection signals when the moving contact assembly rotates to the closed position and the open position.

[0011] The controller is electrically connected to the position detection component and the drive component. The controller is used to receive the detection signal emitted by the position detection component and to control the operation of the drive component.

[0012] In some embodiments of this application, a limiting component is also included, the limiting component including a balance wheel and a limiting member. The balance wheel is fixedly installed on the rotating shaft, and the balance wheel is also provided with two abutting surfaces spaced apart along the circumference of the rotating shaft. The limiting member is fixedly installed and abuts against the two abutting surfaces respectively to limit the angle of rotation of the rotating shaft.

[0013] In some embodiments of this application, the limiting member is threadedly connected to two bolts respectively. One bolt abuts against one of the abutting surfaces when the moving contact rotates to the closed position, and the other bolt abuts against another abutting surface when the moving contact rotates to the open position.

[0014] In some embodiments of this application, the knife switch cabinet is provided with two first clearance holes, and the two rotating shafts extend out of the knife switch cabinet through the corresponding first clearance holes. A sealing element is also fixedly provided at the first clearance hole. The sealing element is provided with a through hole communicating with the first clearance hole, and the rotating shaft also passes through the through hole.

[0015] In some embodiments of this application, each of the moving contact components includes a turntable and a crank. The turntable is rotatably disposed on the outside of the knife switch cabinet via the rotating shaft. The turntable is provided with a first arc-shaped hole, and the crank is provided with a second arc-shaped hole. Bolts for fixing the turntable and the crank are inserted into the first arc-shaped hole and the second arc-shaped hole.

[0016] In some embodiments of this application, a drive shaft is also included. The drive shaft is rotatably mounted inside the switch cabinet and partially extends out of the switch cabinet. The drive shaft is also connected to the transmission structure to drive the two moving contact assemblies to contact or separate from the corresponding stationary contact assemblies under the action of external force, so that the moving contacts of the two moving contact assemblies respectively perform opening and closing movements with the stationary contacts of the corresponding stationary contact assemblies.

[0017] In some embodiments of this application, the stationary contact includes two clamping plates, each of which is provided with a connecting section and a clamping section connected to each other. The two connecting sections are connected to each other, and a clamping space is formed between the two clamping sections. The clamping space is gradually increased from the side closer to the connecting section to the side farther away from the connecting section.

[0018] The electrified railway mainline high-voltage AC double-pole grounding device provided in this application integrates the drive component and the moving contact component on the switch cabinet through the above-described structural configuration. The drive component, controlled by the control box, drives the moving contact component to rotate and contact or separate from the stationary contact component. The specific installation position is determined during the production of this electrified railway mainline high-voltage AC double-pole grounding device. Compared with existing electrified railway mainline high-voltage AC double-pole grounding devices, when installing this electrified railway mainline high-voltage AC double-pole grounding device on site, there is no need to install connecting rods, and therefore no need to consider the relative positional relationship between the moving contact component and the control box, and thus no need to repeatedly adjust the position of the control box. In this way, the installation process of the electrified railway mainline high-voltage AC double-pole grounding device is simplified, making on-site installation and construction more convenient and faster, and improving construction efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the high-voltage AC bipolar grounding device for electrified railway mainline according to this application;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure of a high-voltage AC double-pole grounding device for the main line of a China's electrified railway.

[0022] Figure 3 for Figure 2 A schematic diagram of the structure of a high-voltage AC double-pole grounding device on the main line of a China's electrified railway when it is in the open position;

[0023] Figure 4 for Figure 3 A partial structural schematic diagram of a high-voltage AC bipolar grounding device for the main line of a China's electrified railway.

[0024] Figure 5 for Figure 4 Another perspective on the partial structure of the high-voltage AC double-pole grounding device on the main line of China's electrified railway;

[0025] Figure 6 for Figure 3 Schematic diagram of the moving contact assembly;

[0026] Figure 7 for Figure 3 Another perspective on the moving contact assembly;

[0027] Figure 8 for Figure 2 A schematic diagram of the main structure of the stationary contact assembly.

[0028] Explanation of icon numbers:

[0029] 1000, Electrified railway mainline; 200, Rail; 300, Post; 400, Contact wire; 500, Positive feeder; 100, Electrified railway mainline high-voltage AC double-pole grounding device; 10, Control box; 20, Mounting base; 30, Knife switch cabinet; 40, Stationary contact assembly; 41, Stationary contact; 411, Clamping plate; 4111, Connecting section; 4112, Clamping section; 412, Terminal block; 42, Insulator; 50, Moving contact assembly; 51, Moving contact; 52, Turntable; 521, First arc-shaped hole; 53, Crank; 531, Second arc-shaped hole; 60, Drive assembly; 61, Drive component; 62, Transmission structure; 621, Shaft; 622, Gear; 70, Position detection assembly; 80, Limit assembly; 81, Balance wheel; 82, Limit component; 821, Bolt; 90, Drive shaft.

[0030] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0034] This application provides an embodiment of a high-voltage AC double-pole grounding device 100 for electrified railway mainlines. This device is installed on an electrified railway mainline 1000. Before track maintenance on the electrified railway mainline 1000, the high-voltage AC double-pole grounding device 100 is used to ground the line to completely eliminate residual voltage and ensure the safety of personnel. The electrified railway mainline 1000 is equipped with rails 200, posts 300, overhead contact lines 400, and positive feeder lines 500. The rails 200 are laid on the ground, the posts 300 are fixed to the ground, and the overhead contact lines 400 and positive feeder lines 500 are both fixedly installed on the posts 300.

[0035] Please refer to the reference. Figures 1 to 8 The electrified railway mainline high-voltage AC double-pole grounding device 100 includes a control box 10, a mounting base 20, a switch cabinet 30, two stationary contact assemblies 40, two moving contact assemblies 50, and a drive assembly 60. The two stationary contact assemblies 40 are respectively used to connect to the aforementioned contact wire 400 and positive feeder 500 conductors. The two moving contact assemblies 50 are both used to connect to the rail 200 conductors. These conductors are conductive wires. When the electrified railway mainline high-voltage AC double-pole grounding device 100 performs grounding operations on the line, the residual voltage can flow to the rail 200 through the electrified railway mainline high-voltage AC double-pole grounding device 100 and the conductors.

[0036] The control box 10 is fixedly installed on the column 300. The control box 10 can be fixedly installed on the column 300 by means of clamps, fixing brackets, etc. The control box 10 integrates electronic components and can have modules such as signal receiving, signal transmitting, and control unit.

[0037] Mounting base 20 is fixedly installed on column 300 and located above control box 10. Static contact assembly 40 is fixed on both sides of mounting base 20. Knife switch cabinet 30 is fixedly installed on mounting base 20. Two moving contact assemblies 50 are rotatably installed on the outside of knife switch cabinet 30. Drive assembly 60 is also fixedly installed inside knife switch cabinet 30. Drive assembly 60 is electrically connected to control box 10.

[0038] Similarly, the mounting base 20 can be fixedly installed on the column 300 using clamps, fixing brackets, etc., so that the switch cabinet 30 and the control box 10 mounted on the mounting base 20 are positioned one above the other in the height direction of the column 300. This is intended to facilitate the electrical connection between the drive assembly 60 and the control box 10 via wires. The drive assembly 60 is electrically connected to the control box 10, and its main function is to receive control commands from the control box 10, such as closing commands, opening commands, and stop commands. In other embodiments, the drive assembly 60 and the control box 10 can be electrically connected in other ways, which will not be listed here.

[0039] The stationary contact assembly 40 includes an insulator 42 and a stationary contact 41. The insulator 42 is fixedly mounted on the outside of the mounting base 20 and extends outward. The stationary contact 41 is fixedly mounted on the side of the insulator 42 away from the mounting base 20. The stationary contact 41 can be fixed to the side of the insulator 42 away from the mounting base 20 via a plate, bolt structure, or similar means. This prevents the conductors connecting the stationary contact assembly 40 to the contact network 400 and the positive feeder 500 from getting too close to the switch cabinet 30, thus improving the safety of the high-voltage AC double-pole grounding device 100 for electrified railway mainlines.

[0040] There are several ways to rotatably mount the moving contact assembly 50 on the outside of the switch cabinet 30. For example, the drive assembly 60 includes a transmission structure 62, which includes a rotating shaft 621 that extends out of the outside of the switch cabinet 30. The moving contact assembly 50 is mounted on the rotating shaft 621. Another example is that a mounting post is protruding from the outer surface of the switch cabinet 30, and the moving contact assembly 50 is mounted on the mounting post through a bearing.

[0041] Part of the drive assembly 60 extends outward from the switch cabinet 30 and is connected to two moving contact assemblies 50 for transmission. This drives the two moving contact assemblies 50 to contact or separate from their corresponding stationary contact assemblies 40, allowing the moving contacts 51 of the two moving contact assemblies 50 to perform opening and closing movements with their corresponding stationary contacts 41 of the stationary contact assembly 40. The drive assembly 60 primarily provides power to the moving contact assemblies 50, driving them to slide. It is understood that the drive assembly 60 typically includes a motor; in some examples, it may also include a transmission structure 62 such as a gearbox.

[0042] The closing process of the high-voltage AC double-pole grounding device on the main line of the electrified railway is as follows:

[0043] When the drive assembly 60 receives the control command from the control box 10, it starts to drive the moving contact assembly 50 to rotate. Under the drive of the drive assembly 60, the moving contact assembly 50 moves in the direction of contacting the corresponding stationary contact assembly 40. After the moving contact assembly 50 rotates to a certain extent, the moving contact 51 on the moving contact assembly 50 contacts the stationary contact 41 of the corresponding stationary contact assembly 40, thus realizing the closing movement of the moving contact 51 and the corresponding stationary contact 41. At this time, the contact wire 400 and the positive feeder 500 are grounded through the conductor and the high-voltage AC double-pole grounding device 100 of the electrified railway main line, and the voltage remaining in the line can be eliminated through grounding.

[0044] The process of tripping the high-voltage AC double-pole grounding device on the main line of the electrified railway at 100°C is as follows:

[0045] During the closing process of the high-voltage AC double-pole grounding device 100 on the electrified railway mainline, the residual voltage is completely eliminated. The drive assembly 60 receives the control command from the control box 10 and restarts to drive the moving contact assembly 50 to rotate. Under the drive of the drive assembly 60, the moving contact assembly 50 moves in the direction of separation from the corresponding stationary contact assembly 40. After the moving contact assembly 50 rotates to a certain extent, the moving contact 51 on the moving contact assembly 50 separates from the stationary contact 41 of the corresponding stationary contact assembly 40, and the moving contact 51 and the corresponding stationary contact 41 maintain a certain safe distance, that is, the moving contact 51 and the corresponding stationary contact 41 are opened.

[0046] The electrified railway mainline high-voltage AC double-pole grounding device 100 provided in this application embodiment integrates the drive component 60 and the moving contact component 50 on the switch cabinet 30 through the above-described structural configuration. The drive component 60, under the control of the control box 10, drives the moving contact component 50 to rotate and contact or separate from the stationary contact component 40. The specific installation position of the electrified railway mainline high-voltage AC double-pole grounding device 100 is determined during the production of the device. When installing the electrified railway mainline high-voltage AC double-pole grounding device 100 on site, compared with the existing electrified railway mainline high-voltage AC double-pole grounding device 100, there is no need to install connecting rods, and therefore no need to consider the relative positional relationship between the moving contact component 50 and the control box 10, and thus no need to repeatedly adjust the position of the control box 10. In this way, the installation process of the electrified railway mainline high-voltage AC double-pole grounding device 100 is simplified, making on-site installation and construction more convenient and faster, and improving construction efficiency.

[0047] In some examples, such as Figure 3 and Figure 4 As shown, the drive assembly 60 includes a drive component 61 and a transmission structure 62. The transmission structure 62 is fixedly installed inside the knife switch cabinet 30. Part of the transmission structure 62 extends out of the outside of the knife switch cabinet 30 and is connected to two moving contact assemblies 50 respectively. The drive component 61 is detachably and fixedly installed inside the knife switch cabinet 30 and is also connected to the transmission structure 62.

[0048] This configuration allows the power source (drive component 61) of the drive assembly 60 and the transmission structure 62 for transmission to be separated from each other, enabling the drive assembly 60 to be modularly configured. This facilitates the maintenance of the high-voltage AC double-pole grounding device 100 for electrified railway mainlines. Furthermore, by placing the drive component 61 entirely inside the switch cabinet 30, it is also convenient to perform waterproof sealing treatment on the switch cabinet 30 when parts of the transmission structure 62 extend beyond it.

[0049] The transmission structure 62 includes two rotating shafts 621 and two gears 622. Both rotating shafts 621 are rotatably mounted on the knife switch cabinet 30 and partially extend out of the outside of the knife switch cabinet 30 to be connected to the corresponding moving contact assembly 50. Any one of the rotating shafts 621 is connected to the driving component 61. The two gears 622 are respectively mounted on the two rotating shafts 621 and mesh with each other, so that the two moving contact assemblies 50 rotate synchronously. The moving contact assembly 50 has a closed position that is in contact with the stationary contact assembly 40 and an open position that is separated from it.

[0050] It is understandable that when the driving component 61 drives a rotating shaft 621 to rotate, the two rotating shafts 621 will rotate synchronously under the action of the meshing of the two gears 622, and synchronously drive the corresponding moving contact assembly 50 to rotate synchronously. In this way, the moving contacts 51 of the two moving contact assemblies 50 can synchronously contact or separate from the stationary contacts 41 of the corresponding stationary contact assembly 40.

[0051] This configuration aims to utilize the meshing transmission characteristics of gear 622 to achieve higher synchronization of the rotation of the two moving contact assemblies 50, thereby improving the reliability of the high-voltage AC double-pole grounding device 100 for electrified railway mainlines. In other examples, the two moving contacts 51 can be connected to the drive assembly 60 via a transmission chain, transmission belt, etc.

[0052] Preferably, the gear 622 is a sector gear 622, which can not only reduce the weight of the electrified railway mainline high voltage AC double-pole grounding device 100, but also reduce the manufacturing cost of the electrified railway mainline high voltage AC double-pole grounding device 100.

[0053] In some examples, such as Figures 4 to 6 As shown, the high-voltage AC bipolar grounding device 100 for electrified railway mainline also includes a controller and a position detection component 70. The position detection component 70 is fixedly installed. The position detection component 70 sends a detection signal when the moving contact component 50 rotates to the closed position and the open position. The controller is electrically connected to the position detection component 70 and the drive component 61. The controller is used to receive the detection signal sent by the position detection component 70 and to control the operation of the drive component 61.

[0054] Based on the transmission principle between the aforementioned transmission structure 62 and the two moving contact assemblies 50, the position detection component 70 can determine whether the moving contact 51 has rotated to the closed or open position by detecting the rotation angle of the rotating shaft 621. The position component side assembly can also directly detect the rotation amplitude of the moving contact assembly 50 to determine whether the moving contact assembly 50 has rotated to the closed or open position. Figure 4In the example shown, the position detection component 70 determines whether the moving contact 51 has rotated to the closed or open position by detecting the angle of rotation of the shaft 621. Specifically, the detection component includes a magnetic blow switch, and a trigger element is fixedly mounted on the shaft 621. When the moving contact 51 rotates to the closed or open position, the trigger element on the shaft 621 triggers the magnetic blow switch. In other examples, the detection component includes an infrared detector. When the moving contact assembly 50 rotates to the closed or open position, the moving contact assembly 50 triggers the infrared detector.

[0055] With this configuration, the detection component sends a detection signal to the controller, causing the controller to stop the drive component 60 from working, thereby enabling the moving contact component 50 to move precisely to the target position. At the same time, it also prevents the drive component 60 from working continuously, which could lead to a stall and avoid overloading the drive component 60.

[0056] In some examples, such as Figures 5 to 7 As shown, the high-voltage AC bipolar grounding device 100 for electrified railway mainline also includes a limiting component 80. The limiting component 80 includes a balance wheel 81 and a limiting member 82. The balance wheel 81 is fixedly installed on the rotating shaft 621. The balance wheel 81 is also provided with two abutting surfaces at intervals along the circumference of the rotating shaft 621. The limiting member 82 is fixedly installed and abuts against the two abutting surfaces respectively to limit the rotation angle of the rotating shaft 621.

[0057] Understandably, the balance wheel 81 comes into contact with the contact surface under the drive of the rotating shaft 621. The balance wheel 81 cannot rotate due to the restriction of the contact surface. Since the balance wheel 81 is fixed on the rotating shaft 621, the rotating shaft 621 also cannot rotate due to the restriction of the contact between the balance wheel 81 and the contact surface. Similarly, the moving contact assembly 50 is fixed on the rotating shaft 621, so the moving contact assembly 50 also cannot rotate due to the restriction of the contact between the balance wheel 81 and the contact surface.

[0058] This configuration is intended to prevent the drive assembly 60 from driving the moving contact assembly 50 to rotate excessively, thereby damaging the moving contact assembly 50 or other components of the electrified railway mainline high-voltage AC bipolar grounding device 100.

[0059] It is understandable that the above-mentioned scheme, which includes a controller and a position detection component 70, as well as a limit component 80, for the high-voltage AC double-pole grounding device 100 on the electrified railway mainline, can be combined with each other. In some examples, such as... Figure 4 As shown, the position detection component 70 is correspondingly configured with a moving contact component 50 and a rotating shaft 621, and the limit component 80 is correspondingly configured with another moving contact component 50 and another rotating shaft 621.

[0060] In some examples, such as Figure 4As shown, the limiting member 82 is threadedly connected to two bolts 821. One bolt 821 abuts against a contact surface when the moving contact 51 rotates to the closed position, and the other bolt 821 abuts against another contact surface when the moving contact 51 rotates to the open position. This arrangement is intended to adjust the angle of the limiting shaft 621 by adjusting the engagement between the limiting member 82 and the balance wheel 81 through rotating the bolts 821.

[0061] In some examples, such as Figure 2 and Figure 3 As shown, the knife switch cabinet 30 is provided with two first clearance holes, and two rotating shafts 621 extend out of the knife switch cabinet 30 through the corresponding first clearance holes. A sealing element is also fixedly installed at the first clearance hole. The sealing element is provided with a through hole communicating with the first clearance hole, and the rotating shaft 621 is also provided with a through hole.

[0062] This design aims to improve the specific sealing performance of the switch cabinet 30, prevent rain, snow and dust from directly intruding into the interior of the switch cabinet 30, and avoid damage to the drive components 60 and other structures by foreign objects, which would affect normal operation.

[0063] Considering the assembly error and gap of the high-voltage AC bipolar grounding device 100 for electrified railway mainline, the moving contacts 51 of the two moving contact assemblies 50 may not be able to contact or separate from the corresponding stationary contacts 41 of the stationary contact assembly 40 at the same time.

[0064] In some examples, such as Figures 5 to 7 As shown, each moving contact assembly 50 includes a turntable 52 and a crank 53. The turntable 52 is rotatably mounted on the outside of the knife switch cabinet 30 via a rotating shaft 621. The turntable 52 is provided with a first arc-shaped hole 521, and the crank 53 is provided with a second arc-shaped hole 531. Bolts 821 for fixing the turntable 52 and the crank 53 are inserted into the first arc-shaped hole 521 and the second arc-shaped hole 531. The moving contact 51 is fixedly connected to the side of the crank 53 away from the turntable 52.

[0065] This configuration allows for adjustments to the moving contact assembly 50 by changing its installation position, i.e., changing the initial position of the moving contact assembly 50 relative to the stationary contact assembly 40. This compensates for assembly tolerances and clearances, enabling the moving contacts 51 of both moving contact assemblies 50 to simultaneously contact or separate from the corresponding stationary contacts 41 of the stationary contact assembly 40. Furthermore, the initial position of the moving contact assembly 50 can be changed by using two arc-shaped holes and bolts 821. This provides higher adjustment precision and eliminates the need to completely disassemble the crank 53; adjustment can be achieved simply by loosening the bolts 821.

[0066] In some examples, the moving contact 51 is detachably fixed to the side of the crank 53 away from the turntable 52. With this configuration, the stationary contact 41 can be connected by a wire. The crank 53 and the moving contact 51 can be made of different materials to reduce the manufacturing cost of the moving contact 51, and the moving contact 51 can be replaced.

[0067] In some examples, such as Figure 2 and Figure 3 As shown, the high-voltage AC double-pole grounding device 100 for electrified railway mainline also includes a drive shaft 90. The drive shaft 90 is rotatably installed inside the switch cabinet 30 and partially extends out of the switch cabinet 30. The drive shaft 90 is also connected to the transmission structure 62 to drive the two moving contact assemblies 50 to contact or separate from the corresponding stationary contact assembly 40 under the action of external force, so that the moving contacts 51 of the two moving contact assemblies 50 respectively perform opening and closing movements with the stationary contacts 41 of the corresponding stationary contact assembly 40.

[0068] With this configuration, in the event of failure of components such as the power source of the drive assembly 60 and the control box 10, workers can apply external force to the drive shaft 90 to drive the moving contact 51 to contact or separate from the stationary contact 41, thereby improving the reliability of the high-voltage AC double-pole grounding device 100 for electrified railway mainlines.

[0069] The knife switch cabinet 30 is provided with a second clearance hole. The drive shaft 90 extends out of the knife switch cabinet 30 through the second clearance hole. A sealing element is also fixedly installed at the second clearance hole. The sealing element has a through hole that communicates with the second clearance hole. The rotating shaft 621 also passes through the through hole.

[0070] In some examples, such as Figure 2 As shown, the high-voltage AC bipolar grounding device 100 for electrified railway mainline also includes a handle assembly, which includes a U-shaped fixing block, a hook ring, and a crank handle. The U-shaped fixing block is fixedly connected to the drive shaft 90, the hook ring passes through the through hole of the U-shaped fixing block, and the crank handle rests on the hook ring. Workers can drive the drive shaft 90 to rotate by cranking the handle.

[0071] In some examples, such as Figure 8 As shown, the stationary contact 41 includes two clamping plates 411. Each clamping plate 411 is provided with a connecting section 4111 and a clamping section 4112 that are connected to each other. The two connecting sections 4111 are connected to each other, and a clamping space is formed between the two clamping sections 4112. The clamping space is gradually increased from the side closer to the connecting section 4111 to the side farther away from the connecting section 4111.

[0072] It is understandable that the clamping space gradually increases from the side closer to the connecting section 4111 to the side farther away from the connecting section 4111, which means that the clamping space is widened, that is, the two clamping plates 411 have a flared opening structure.

[0073] With this configuration, when the stationary contact 41 and the moving contact 51 are in contact (i.e., when the circuit is closed), the stationary contact 41 serves as a guide for the air passage of the moving contact 51.

[0074] In some examples, a terminal block 412 is also sandwiched between the two clamping plates 411 to facilitate the connection of the stationary contact 41 to the circuit using a wire. In some examples, a spring may also be provided on the opposite side of the two clamping plates 411 to provide preload, so that the stationary contact 41 and the moving contact 51 fit tightly together. Furthermore, the clamping plates 411 may also be provided with slits.

[0075] In some embodiments, the control box 10 includes a battery, which controls the operation of the drive assembly 60 by supplying power to the drive assembly 60. In some examples, the control box 10 is also connected to the aforementioned position detection assembly 70 to collect closing and opening information of the high-voltage AC double-pole grounding device 100 on the electrified railway mainline.

[0076] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A high-voltage AC double-pole grounding device for an electrified railway mainline, wherein the electrified railway mainline is provided with rails, posts, contact wires, and positive feeders, the rails are laid on the ground, the posts are fixed to the ground, and the contact wires and positive feeders are both fixedly installed on the posts, characterized in that... The electrified railway mainline high-voltage AC bipolar grounding device includes a control box, mounting base, switch cabinet, two stationary contact assemblies, two moving contact assemblies, and a drive assembly; wherein... The control box is fixedly installed on the column, and the mounting base is fixedly installed on the column and located above the control box. The stationary contact assemblies are fixed on both sides of the mounting base. The two stationary contact assemblies are respectively used to connect to the contact wire and the positive feeder conductor. The switch cabinet is fixedly installed on the mounting base. Two moving contact assemblies are rotatably arranged on the outside of the switch cabinet. Both moving contact assemblies are used to connect to the rail conductor. The drive assembly is also fixedly installed inside the switch cabinet. The drive assembly is electrically connected to the control box. Part of the drive assembly extends out of the switch cabinet and is connected to the two moving contact assemblies to drive the two moving contact assemblies to contact or separate from the corresponding stationary contact assemblies, so that the moving contacts of the two moving contact assemblies respectively perform opening and closing movements with the stationary contacts of the corresponding stationary contact assemblies.

2. The high-voltage AC double-pole grounding device for electrified railway mainline as described in claim 1, characterized in that, The drive assembly includes a drive component and a transmission structure. The transmission structure is fixedly installed inside the switch cabinet. A portion of the transmission structure extends out of the switch cabinet and is connected to the two moving contact assemblies. The drive component is detachably and fixedly installed inside the switch cabinet and is also connected to the transmission structure.

3. The high-voltage AC double-pole grounding device for electrified railway mainline as described in claim 2, characterized in that, The transmission structure includes two rotating shafts and two gears. Both rotating shafts are rotatably mounted on the switch cabinet and partially extend out of the switch cabinet to be connected to the corresponding moving contact assembly. Any one of the rotating shafts is connected to the driving component. The two gears are respectively mounted on the two rotating shafts and mesh with each other, so that the two moving contact assemblies rotate synchronously. The moving contact assembly has a closed position that is in contact with the stationary contact assembly and a closed position that is separated from it.

4. The high-voltage AC double-pole grounding device for electrified railway mainline as described in claim 3, characterized in that, It also includes a controller and a position detection component, the position detection component being fixedly installed, the position detection component emitting detection signals when the moving contact assembly rotates to the closed position and the open position; The controller is electrically connected to the position detection component and the drive component. The controller is used to receive the detection signal emitted by the position detection component and to control the operation of the drive component.

5. The high-voltage AC double-pole grounding device for electrified railway mainline as described in claim 3, characterized in that, It also includes a limiting component, which includes a balance wheel and a limiting member. The balance wheel is fixedly installed on the rotating shaft, and the balance wheel is also provided with two abutting surfaces spaced apart along the circumference of the rotating shaft. The limiting member is fixedly installed and abuts against the two abutting surfaces respectively to limit the angle of rotation of the rotating shaft.

6. The high-voltage AC double-pole grounding device for electrified railway mainline as described in claim 5, characterized in that, The limiting member is threaded with two bolts respectively. One bolt abuts against one of the abutting surfaces when the moving contact rotates to the closed position, and the other bolt abuts against another abutting surface when the moving contact rotates to the open position.

7. The high-voltage AC double-pole grounding device for electrified railway mainline as described in claim 3, characterized in that, The knife switch cabinet is provided with two first clearance holes. The two rotating shafts extend out of the knife switch cabinet through the corresponding first clearance holes. A sealing element is also fixedly provided at the first clearance hole. The sealing element has a through hole communicating with the first clearance hole. The rotating shaft also passes through the through hole.

8. The high-voltage AC double-pole grounding device for electrified railway mainline as described in claim 3, characterized in that, Each of the moving contact assemblies includes a turntable and a crank. The turntable is rotatably disposed on the outside of the knife switch cabinet via the rotating shaft. The turntable is provided with a first arc-shaped hole, and the crank is provided with a second arc-shaped hole. Bolts for fixing the turntable and the crank are inserted into the first arc-shaped hole and the second arc-shaped hole.

9. The high-voltage AC double-pole grounding device for electrified railway mainline as described in claim 2, characterized in that, It also includes a drive shaft, which is rotatably mounted inside the switch cabinet and partially extends out of the switch cabinet. The drive shaft is also connected to the transmission structure to drive the two moving contact assemblies to contact or separate from the corresponding stationary contact assemblies under the action of external force, so that the moving contacts of the two moving contact assemblies respectively perform opening and closing movements with the stationary contacts of the corresponding stationary contact assemblies.

10. The high-voltage AC double-pole grounding device for electrified railway mainline as described in claim 1, characterized in that, The stationary contact includes two clamping plates, each of which has a connecting section and a clamping section that are connected to each other. The two connecting sections are connected to each other, and a clamping space is formed between the two clamping sections. The clamping space is gradually increased from the side closer to the connecting section to the side farther away from the connecting section.

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