A composite electrical testing grounding device and contact network electrical testing grounding control system

Abstract

This invention discloses a composite voltage detection and grounding device and a contact network voltage detection and grounding control system. The device includes a mounting bracket, a driving device, and a voltage detection and grounding rod assembly. The voltage detection and grounding rod assembly includes a first insulating rod, a grounding switch, a detector, and a metal rod. The driving device is connected to the rear end of the first insulating rod and is used to drive the first insulating rod to swing. The grounding switch and the detector are both located at the front end of the first insulating rod. In its free state, the front end of the metal rod is located on the open side of the grounding switch, and the open side and the metal rod are arranged side by side along the extension direction of the contact network. The system is based on the device. Using the device and system provided by this solution not only facilitates the intelligent and automated realization of voltage detection and grounding, but also enables the voltage detection and grounding equipment to be integrated, allowing voltage detection and grounding to be completed during continuous operation. Furthermore, compared with existing technologies, it has the characteristics of more reliable and safer voltage detection and grounding.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, and in particular to a composite voltage detection and grounding device and a contact network voltage detection and grounding control system. Background Technology

[0002] In the field of rail transit, electrified railway contact networks are installed in places such as locomotive depots, EMU depots (stations) and rolling stock depots, passenger depots and subway depots. Before carrying out work such as roof preparation, maintenance and equipment maintenance, it is necessary to perform operations such as disconnecting the disconnecting switch, checking for voltage, releasing residual voltage and grounding.

[0003] Currently, after the overhead contact line is de-energized, voltage testing is performed manually using voltage detectors. Before testing, the voltage detector pole needs to be manually checked for energization once. After the overhead contact line is disconnected and the power is cut off, the operator lifts the voltage detector pole along the track and uses the metal head of the voltage detector pole to touch and press against the overhead contact line three times to check for energization. If there is no audible or visual alarm, it means there is no power (if there is an audible or visual alarm, it means there is still power, but the voltage level cannot be determined, and the ground crew needs to raise the pantograph to check the voltage).

[0004] This traditional method of voltage testing relies entirely on manual labor, resulting in high labor intensity and low work efficiency. It greatly restricts the development of electric bus maintenance and repair towards mechanization, automation, and intelligent control. The requirement for three voltage tests is due to concerns about human error causing missed tests, which poses certain safety hazards and is detrimental to safe production.

[0005] Grounding devices are protective devices that ensure the safety of maintenance work areas for electric locomotives, EMUs, urban rail trains, and other trains by safely grounding the overhead contact line in those areas. Specifically, after the disconnecting switch is opened and power is cut off, the maintenance work area on the roof can be reliably grounded after voltage testing and residual voltage release, ensuring that the maintenance work area is de-energized and protecting the personal safety of personnel.

[0006] Further optimization of the overhead contact line technology described above is undoubtedly of great significance to the innovation of rail transit technology. Summary of the Invention

[0007] To address the aforementioned technical issue of further optimizing the overhead contact line technology, which is undoubtedly of great significance to the innovation of rail transit technology, this invention provides a composite voltage detection and grounding device and an overhead contact line voltage detection and grounding control system. The device and system provided by this solution not only facilitate the realization of intelligent and automated voltage detection and grounding, but also enable the voltage detection and grounding equipment to be integrated and to complete the voltage detection and grounding process continuously.

[0008] The present invention provides a composite voltage testing and grounding device and a contact network voltage testing and grounding control system to solve the problem through the following technical points: A composite voltage testing and grounding device includes a mounting bracket, a driving device fixed on the mounting bracket, and a voltage testing and grounding rod assembly connected to the output end of the driving device;

[0009] The voltage detection grounding rod assembly includes a first insulating rod, a grounding knife fixed on the first insulating rod, a detector rotatably connected to the first insulating rod and used for voltage detection, and a metal rod serving as the metal head of the detector.

[0010] The driving device is connected to the rear end of the first insulating rod and is used to drive the first insulating rod to swing, forming that the rotatable shaft and the shaft that forms the swing are parallel to each other;

[0011] The grounding switch and detector are both located at the front end of the first insulating rod. When the metal rod is in a free state, the front end of the metal rod is located on the opening side of the grounding switch, and the opening side and the metal rod are arranged side by side along the extension direction of the contact wire.

[0012] Regarding contact wire voltage testing, although electrically driven grounding devices exist that can drive the grounding rod to maintain contact or separation from the contact wire, current technology involves installing a limit switch mechanism on the hook. The limit switch signal controls the rotation of the drive mechanism to achieve contact or separation between the hook and the contact wire. If the limit switch malfunctions and falsely sends a signal when the hook is close to the contact wire, the rotation stops, resulting in a loose connection (failed grounding). This is difficult for dispatchers to detect even through cameras, posing a significant threat to the safety of workers.

[0013] Meanwhile, in existing technologies, the corresponding voltage detection components and grounding components are independent of each other. If, after using the voltage detection component to perform voltage detection on the contact network, the voltage on the contact network is 0 or less than 5KV, then a grounding operation is performed; otherwise, a discharge process is required before grounding can proceed. The existing voltage detection method also dictates that the voltage detection component is separated from the contact network after grounding is completed. Therefore, the existing operating mode and the corresponding component settings mean that existing technology cannot perform real-time voltage detection on the contact network after grounding is completed.

[0014] To address the above issues, this solution provides a specific composite voltage detection and grounding device. In its specific structural design, the mounting bracket serves as the device frame, and the driving device drives the voltage detection and grounding rod assembly to swing. The voltage detection and grounding rod assembly includes a grounding blade and a detector. In practical application, a grounding wire is connected to the grounding blade to ground the contact network after connection. The detector is used for voltage detection of the contact network, such as voltage detection or voltage level detection. Furthermore, the grounding blade and detector are both located at the front end of the first insulating rod. In its free state, the front end of the metal rod is located on the open side of the grounding blade, with the open side and the metal rod arranged side-by-side along the extension direction of the contact network. Thus, when the voltage detection and grounding rod assembly swings towards the open side of the grounding blade under the action of the driving device, the metal rod first contacts the contact network. At this time, the detector can complete the voltage detection operation of the contact network. When the voltage detection result meets the grounding conditions, the voltage detection and grounding rod assembly swings further, at which point the metal rod rotates relative to the first insulating rod, allowing the contact network to be embedded into the grounding blade from the open side, thereby completing the grounding of the contact network. During the swinging process of the voltage detection and grounding rod assembly, which completes the voltage detection and grounding process, the metal rod always maintains contact with the contact network, so that the grounding switch and detector can perform their respective voltage detection and grounding functions.

[0015] As described in the above workflow, this device uses a single drive unit and simultaneously mounts a detector and a grounding switch on the voltage detection and grounding rod assembly. By defining the connection relationship of the metal rods on the detector and the positional relationship between the metal rods and the grounding switch, the contact network can be tested for voltage and then grounded within a continuous swing direction. This solution provides an integrated voltage detection and grounding solution. Based on existing technology, the automatic control of the drive unit and the automatic judgment of the voltage detection results can be easily achieved by those skilled in the art. Therefore, this method not only replaces traditional manual voltage detection operations, realizing automated and intelligent voltage detection and grounding of the contact network, but also avoids dangerous accidents and improves efficiency. High efficiency of contact wire voltage detection and grounding; Regarding contact wire voltage detection, as the contact wire penetrates the grounding switch, the metal rod can rotate, ensuring that the contact wire not only does not restrict the further swinging of the voltage detection and grounding rod assembly, but also that the metal rod remains in contact with the contact wire during its swinging relative to the first insulating rod. Therefore, this scheme effectively avoids the occurrence of incomplete voltage detection connections; Regarding contact wire voltage detection, since the metal rod remains in contact with the contact wire during its swinging relative to the first insulating rod, the detector can still perform contact wire voltage detection even after the grounding switch has completed its engagement with the contact wire. This allows the detector to continue providing real-time contact wire voltage detection protection during the contact wire grounding process.

[0016] In practical application, this scheme is preferably configured such that the detector, which is rotatably connected to the first insulating rod, is rotatably connected via a hinge shaft. An elastic component, such as a torsion spring, is provided between the detector and the first insulating rod. In its free state, the torsion spring constrains the metal rod, ensuring it is positioned in front of the opening. This allows the metal rod to contact the contact network before the grounding switch during the swinging process of the voltage testing grounding rod assembly. As the voltage testing grounding rod assembly further swings to connect the grounding switch to the contact network, the elastic component undergoes elastic deformation, storing energy through this deformation to maintain reliable contact between the metal rod and the contact network.

[0017] As those skilled in the art would understand, the continuous operation process described above refers to the unidirectional swinging process of the voltage testing and grounding rod assembly until the grounding switch engages with the contact network: after successful voltage testing, it swings further to complete the contact network grounding; therefore, it does not mean that the swinging of the voltage testing and grounding ring assembly is continuous. It is preferable to use an intermittent swinging method, such as swinging further to complete grounding after successful voltage testing.

[0018] As a further technical solution for the composite voltage detection and grounding device described above:

[0019] As a technical solution to facilitate a reliable and insulated connection between the detector and the first insulating rod, the following configuration is provided: the voltage detection grounding rod assembly further includes a connecting block and a second insulating rod. The connecting block is fixed to the first insulating rod, the rear end of the second insulating rod is rotatably connected to the connecting block, and the rear end of the detector is fixedly connected to the front end of the second insulating rod. In this solution, the second insulating rod serves as insulation between the detector and the first insulating rod, such as for isolating the detector from the grounding wire. The connecting block can be made of metal to achieve a reliable connection between the two insulating rods.

[0020] Regarding the grounding of the overhead contact system, currently, workers must wear safety belts when working on the roof of electric buses. The fixed end of the safety belt is attached to the contact network. Under external forces, the contact network can move up, down, left, and right, causing instability in its connection with the hook and thus affecting grounding performance. However, existing technology only considers up and down movement: a damper is installed at the end of the grounding rod, and the output torque of the damper keeps the hook in contact with the contact network. If the damper fails, it is not visible and there is no signal output, resulting in an unstable connection between the contact network and the hook. To address the above problems, this solution is configured such that the grounding knife includes a copper busbar for forming the boundary of the contact network clamping gap;

[0021] It also includes a driving component for moving the copper busbar to change the width of the clamping gap. This solution utilizes the driving component to move the copper busbar and change the width of the clamping gap to clamp the contact wire. This effectively avoids the problem of contact wire grounding failure due to human error or other factors causing the contact wire to swing.

[0022] As a technical solution with a simple driving form and simple structure, and which can protect the contact network through elastic buffering during the clamping process, the grounding knife is configured as follows: the grounding knife also includes a grounding knife body, and the grounding knife also includes a push rod, a compression spring, a connecting flange, a miniature cylinder, a quick connector and an insulating air pipe. The miniature cylinder serves as the driving component, the quick connector serves as the air source pipe interface of the miniature cylinder, and the insulating air pipe serves as the air source pipe.

[0023] The push rod and the compression spring are connected in series to form an intermediate connecting member, and the push rod is connected to the piston rod of the miniature cylinder through the intermediate connecting member;

[0024] The miniature cylinder is connected to the grounding switch body via the connecting flange. In practical application, the use of an insulated gas pipe for the gas supply is designed to prevent electric shock accidents. The quick-connect coupling facilitates the connection and disconnection of the corresponding components. The method of obtaining a power source for the copper busbar is convenient for the miniature cylinder's drive mechanism: compressed gas in a compressed gas cylinder can provide the driving force for the miniature cylinder. The specific operation process of this solution is as follows: controlling the gas supply state of the miniature cylinder through the insulated gas pipe allows the miniature cylinder to extend and retract. The copper busbar moves in tandem with this extension and retraction. When the copper busbar contacts the contact wire, compression deformation is generated by the compression spring, ensuring reliable contact between the copper busbar and the contact wire while preventing damage to the contact wire.

[0025] In existing technologies, during the voltage detection and grounding processes, taking the grounding process as an example, as mentioned above, limit switch malfunctions may lead to intermittent connections. To more accurately determine the position of the contact wire relative to the grounding switch, a technical solution is provided that includes a torque detection device. This torque detection device detects the torque of the driving device when it drives the voltage detection and grounding rod assembly to swing. In this solution, the torque increases after a metal rod with a matching torsion spring contacts the contact wire, and the torque increases after the contact wire is embedded in the grounding switch from the open side to the bottom side of the opening contacts the contact wire. This torque feedback provides information on the voltage detection and grounding contact status of the contact wire, thereby obtaining a more reliable contact relationship with the contact wire. Those skilled in the art will recognize that the torque detection can be based on a torque sensor or by monitoring the current of a servo motor, such as the one used as a power source on the driving device.

[0026] To prevent damage to the contact network caused by excessive swinging of the grounding rod assembly, the system includes a limiting device to constrain the grounding rod assembly from swinging to the contact network's stopping point. In practical applications, the limiting device is configured as a position limiting device located on the swing trajectory of the grounding rod assembly, thereby limiting further swinging of the grounding rod assembly.

[0027] To enable availability detection before use and charging of the detector during idle periods, thereby optimizing the intelligence and automation level of this device, it is configured to include: a column fixed on the mounting bracket and a detection device and a charging device connected to the top of the column;

[0028] When the grounding rod assembly rotates away from the contact network under the action of the driving device, the detector can rotate to cooperate with the detection device and the charging device.

[0029] In the aforementioned cooperative state, the detection device is used to detect whether the detector can work normally, and the charging device is used to charge the detector. Based on the existing detector design, to facilitate automation and intelligence, the detector is preferably configured to have wireless charging and wireless transmission of voltage detection results. Therefore, the charging device preferably uses a wireless charging module. Regarding the detection device, for example, a third insulating rod is connected to the column, and a detection block is connected to the third insulating rod. The detection block is a conductor and has an external power supply. Before the detector is officially used for contact network voltage detection, the detector is energized through contact between the metal rod and the detection block. By comparing the voltage detection result of the detector at this time with the known parameters of the external power supply, it can be determined whether the detector can work normally.

[0030] Existing drive devices generally include a motor and a reducer. Although the reducer has a certain self-locking function, from the perspective of safety redundancy of the contact network and this device, it is set to also include a locking device fixed on the mounting bracket. The locking device is used to lock the voltage testing grounding rod assembly on the mounting bracket when the device is in standby or idle.

[0031] As a technical solution that can change the extension length of the first insulating rod relative to the mounting bracket to adapt to specific applications, the voltage testing grounding rod assembly is configured as follows: the voltage testing grounding rod assembly further includes a transition rod, the transition rod is connected in series with the first insulating rod and serves as the rear end of the voltage testing grounding rod assembly, the voltage testing grounding rod assembly is connected to the driving device through the transition rod, and the connection position of the driving device on the transition rod is adjustable along the axial direction of the transition rod. The above adjustability is used to realize the extension length of the voltage testing grounding rod assembly relative to the driving device.

[0032] To facilitate automation, intelligence, or improve the level of automation and intelligence, this solution also discloses a contact network voltage detection and grounding control system, including the composite voltage detection and grounding device as described in any of the above, and further including:

[0033] Voltage detection unit: Connected to the detector, used for detecting voltage value or voltage level on the contact wire;

[0034] Detection unit: used for detecting the resistance value and energized status of the grounding wire on the grounding switch;

[0035] Control unit: Used to enable human-machine interaction with the composite voltage detection and grounding device.

[0036] The present invention has the following beneficial effects:

[0037] (1) The present invention can perform a good or bad test on the detector used as an electroscope, making the electroscope test results more reliable;

[0038] (2) The present invention can charge the detector used as an electroscope, which facilitates the realization of intelligence or automation of the device or system or improves the level of intelligence or automation.

[0039] (3) The present invention can perform contact-type voltage detection and identify whether the contact is in place and accurate.

[0040] (4) The grounding reliability of the present invention is very high. A pressure block device including copper busbar and driving component is added to the grounding knife. The action of the copper busbar is controlled by a micro cylinder, and the contact wire is pressed against the copper busbar and the grounding knife body by the compression spring, thereby ensuring the close cooperation between the contact wire and the two, and ensuring the reliability of grounding.

[0041] (5) The detector and grounding switch cooperation relationship and the detector and grounding switch driving mode provided by the present invention facilitate the realization of intelligence and automation or improve the level of intelligence and automation, and facilitate the solution of problems such as voltage detection safety and grounding safety and improve voltage detection and grounding efficiency.

[0042] (6) The device or system structure provided by the present invention not only realizes the integration or completeness of equipment, but also facilitates real-time voltage detection during the grounding process of the contact network.

[0043] (7) The device or system provided by the present invention has the characteristics of more reliable and safer completion of voltage detection and grounding compared with the prior art. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of a composite voltage detection and grounding device in cooperation with a contact network in a specific embodiment.

[0045] Figure 2 This is a schematic diagram of the grounding state of a specific embodiment of a composite voltage detection and grounding device in conjunction with a contact network;

[0046] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0047] Figure 4 for Figure 2 A magnified view of a section at point B in the middle;

[0048] Figure 5for Figure 2 A magnified view of a section at point C;

[0049] Figure 6 A front view of a specific embodiment of a composite voltage detection and grounding device in conjunction with a contact network, showing the grounding state.

[0050] Figure 7 This is a schematic diagram of a specific state of a composite voltage detection and grounding device during the process of the voltage detection and grounding rod assembly detaching from the contact network and rotating to cooperate with the detection device and the charging device.

[0051] Figure 8 This is a schematic diagram of a specific standby state embodiment of a composite voltage detection and grounding device, showing the voltage detection and grounding rod assembly detached from the contact network and rotated to a specific state after cooperating with the detection device and charging device.

[0052] Figure 9 for Figure 8 A magnified view of a section at point D;

[0053] Figure 10 In a specific standby state embodiment of a composite voltage detection and grounding device, the voltage detection and grounding rod assembly is detached from the contact network and rotated to a specific state after cooperating with the detection device and the charging device;

[0054] Figure 11 This is a schematic diagram of the composite voltage testing and grounding rod structure in a specific embodiment of a composite voltage testing and grounding device;

[0055] Figure 12 for Figure 11 Enlarged view of a section at point E in the middle;

[0056] Figure 13 A schematic diagram of the pressure block device structure in a specific embodiment of a composite voltage detection and grounding device;

[0057] Figure 14 This is a schematic diagram of the structure of the assembly formed by the driving device and the mounting bracket in a specific embodiment of a composite voltage detection and grounding device.

[0058] The reference numerals in the diagram are, in order: 1. Mounting bracket; 2. Locking device; 3. Grounding rod assembly; 4. Detection device; 5. Charging device; 6. Column; 7. Drive device; 8. Limiting device; 99. Contact wire; 21. Locking cylinder; 22. Locking block; 23. Proximity sensor; 81. Connecting seat; 82. Limiting sensor; 31. Transition rod; 32. First insulating rod; 33. Grounding wire; 34. Connecting block; 35. Second insulating rod; 36. Detector. 37. Metal rod; 38. Pressing device; 39. Grounding knife; 41. Detection block; 42. Third insulating rod; 43. Connecting flange seat; 71. Servo motor; 72. Worm gear reducer; 73. Clamping device; 74. Diaphragm coupling; 75. Bearing seat; 76. Mounting seat; 79. Handwheel; 381. Copper busbar; 382. Push rod; 383. Compression spring; 384. Connecting flange; 385. Miniature cylinder; 386. Quick connector; 387. Insulating air pipe. Detailed Implementation

[0059] The present invention will be further described in detail below with reference to the embodiments, but the structure of the present invention is not limited to the following embodiments.

[0060] Example 1:

[0061] like Figures 1 to 14 As shown, a composite voltage testing and grounding device includes a mounting bracket 1, a driving device 7 fixed on the mounting bracket 1, and a voltage testing and grounding rod assembly 3 connected to the output end of the driving device 7.

[0062] The voltage detection grounding rod assembly 3 includes a first insulating rod 32, a grounding knife 39 fixed on the first insulating rod 32, a detector 36 rotatably connected to the first insulating rod 32 and used for voltage detection, and a metal rod 37 serving as the metal head of the detector 36.

[0063] The driving device 7 is connected to the rear end of the first insulating rod 32 and is used to drive the first insulating rod 32 to swing, forming that the rotatable shaft and the shaft that forms the swing are parallel to each other;

[0064] The grounding knife 39 and the detector 36 are both located at the front end of the first insulating rod 32. In the free state, the front end of the metal rod 37 is located on the opening side of the grounding knife 39. The opening side and the metal rod 37 are arranged side by side along the extension direction of the contact wire 99.

[0065] Regarding the voltage testing of the overhead contact line 99, although electrically driven grounding devices exist that can drive the grounding rod to maintain contact or separation from the contact line 99, current technology involves installing a limit switch mechanism on the hook. The drive mechanism's rotation is controlled by the limit switch signal to achieve contact or separation between the hook and the contact line 99. If the limit switch malfunctions and falsely sends a signal when the hook approaches the contact line 99, the rotation stops, resulting in a loose connection (failed grounding). This is difficult for dispatchers to detect even through cameras, posing a significant threat to the safety of workers.

[0066] Meanwhile, in existing technologies, the voltage detection component and the grounding component are independent components. For example, if the voltage on the contact wire 99 is 0 or less than 5KV after the voltage detection component is used, a grounding operation is performed; otherwise, a discharge process is required before grounding. The existing voltage detection method also dictates that the voltage detection component is separated from the contact wire 99 after grounding. Therefore, the existing operating mode and component settings mean that existing technology cannot perform real-time voltage detection on the contact wire 99 after grounding.

[0067] To address the above issues, this solution provides a specific composite voltage detection and grounding device. In the specific structural design, the mounting bracket 1 serves as the device frame, and the driving device 7 is used to drive the voltage detection and grounding rod assembly 3 to swing. The voltage detection and grounding rod assembly 3 includes a grounding blade 39 and a detector 36. In practical application, a grounding wire 33 is connected to the grounding blade 39 to achieve grounding of the contact network 99 after the grounding blade 39 is connected to the contact network 99. The detector 36 is used for voltage detection of the contact network 99, such as for voltage detection or voltage level detection. Simultaneously, the grounding knife 39 and detector 36 are both located at the front end of the first insulating rod 32. In its free state, the front end of the metal rod 37 is located on the open side of the grounding knife 39. The open side and the metal rod 37 are arranged side-by-side along the extension direction of the contact network 99. Thus, when the voltage-detecting grounding rod assembly 3 swings towards the open side of the grounding knife 39 under the action of the driving device 7, the metal rod 37 first contacts the contact network 99. At this time, the detector 36 can complete the voltage detection operation of the contact network 99. When the voltage detection result meets the grounding conditions, the voltage-detecting grounding rod assembly 3 swings further. At this time, the metal rod 37 rotates relative to the first insulating rod 32, allowing the contact network 99 to be embedded into the grounding knife 39 from the open side, thereby completing the grounding of the contact network 99. During the swinging process of the voltage-detecting grounding rod assembly 3 from voltage detection to grounding, the metal rod 37 always maintains contact with the contact network 99, ultimately ensuring that the cooperation between the grounding knife 39 and detector 36 and the contact network 99 allows each to perform its corresponding voltage detection and grounding functions.

[0068] As described in the above workflow, this device uses a single drive unit 7 and simultaneously mounts a detector 36 and a grounding knife 39 on the voltage detection and grounding rod assembly 3. By defining the connection relationship of the metal rod 37 on the detector 36 and the positional relationship between the metal rod 37 and the grounding knife 39, the contact network 99 can be tested for voltage and then grounded within a continuous swing direction. This solution provides an integrated voltage detection and grounding solution. Based on existing technology, the automatic control of the drive unit 7 and the automatic judgment of the voltage detection results can be easily achieved by those skilled in the art. Therefore, this method not only replaces traditional manual voltage detection operations, realizing the automation and intelligence of contact network 99 voltage detection and grounding, but also avoids dangerous accidents and improves the efficiency of contact network 99 voltage detection and grounding work. Regarding the efficiency of contact wire 99 voltage detection, as the contact wire 99 penetrates the grounding switch 39, the metal rod 37 can rotate, ensuring that the contact wire 99 not only does not restrict the further swinging of the voltage detection grounding rod assembly 3, but also that the metal rod 37 remains in contact with the contact wire 99 during its swinging relative to the first insulating rod 32. Therefore, this scheme can effectively avoid the occurrence of incomplete voltage detection. Regarding the contact wire 99 voltage detection, since the metal rod 37 remains in contact with the contact wire 99 during its swinging relative to the first insulating rod 32, the detector 36 can still perform contact wire 99 voltage detection even after the grounding switch 39 has completed its cooperation with the contact wire 99. This allows the detector 36 to continue providing real-time contact wire 99 voltage detection protection during the grounding process of the contact wire 99.

[0069] In practical application, this scheme is preferably configured such that the detector 36, which is rotatably connected to the first insulating rod 32, is rotatably connected via a hinge shaft. An elastic component, such as a torsion spring, is provided between the detector 36 and the first insulating rod 32. In its free state, the torsion spring constrains the metal rod 37, ensuring that the metal rod 37 is positioned in front of the opening side. This allows the metal rod 37 to contact the contact network 99 before the grounding knife 39 during the swinging process of the voltage testing grounding rod assembly 3. Then, during the further swinging of the voltage testing grounding rod assembly 3 to connect the grounding knife 39 to the contact network 99, the elastic component undergoes elastic deformation, storing energy through this deformation to maintain a reliable contact relationship between the metal rod 37 and the contact network 99.

[0070] As those skilled in the art would understand, the continuous operation process described above refers to the unidirectional swinging process of the voltage testing and grounding rod assembly 3 swinging until the grounding knife 39 engages with the contact wire 99: after successful voltage testing, it swings further to complete the grounding of the contact wire 99. Therefore, it does not mean that the swinging of the voltage testing and grounding ring assembly is continuous. It is preferable to adopt an intermittent swinging method, such as swinging further to complete the grounding after the voltage testing is passed.

[0071] Example 2:

[0072] like Figures 1 to 14As shown, this embodiment further defines the features of Embodiment 1: As a technical solution to facilitate a reliable and insulated connection between the detector 36 and the first insulating rod 32, the following configuration is provided: the voltage detection grounding rod assembly 3 further includes a connecting block 34 and a second insulating rod 35. The connecting block 34 is fixed to the first insulating rod 32, the rear end of the second insulating rod 35 is rotatably connected to the connecting block 34, and the rear end of the detector 36 is fixedly connected to the front end of the second insulating rod 35. In this solution, the second insulating rod 35 serves as insulation between the detector 36 and the first insulating rod 32, such as for isolating the detector 36 from the grounding wire 33. The connecting block 34 can be made of metal to achieve a reliable connection between the two insulating rods.

[0073] Regarding the grounding of the overhead contact line 99, currently, workers must wear safety belts when working on the roof of electric buses. The fixed end of the safety belt is attached to the overhead contact line 99. Under external force, the overhead contact line 99 can move up, down, left, and right, causing unstable connection with the hook and thus affecting grounding performance. However, existing technology only considers up and down movement: a damper is installed at the end of the grounding rod, and the output torque of the damper keeps the hook in contact with the overhead contact line 99. If the damper fails, it is not visible and there is no signal output, resulting in unstable connection between the overhead contact line 99 and the hook. To address the above problems, this solution is configured such that the grounding knife 39 includes a copper busbar 381 for forming the boundary of the clamping gap of the overhead contact line 99;

[0074] It also includes a driving component for moving the copper busbar 381 to change the width of the clamping gap. Using this solution, the driving component moves the copper busbar 381 to change the width of the clamping gap, thus achieving the purpose of clamping the contact wire 99. This effectively avoids the problem of contact wire 99 grounding failure due to human factors or other factors swinging.

[0075] As a technical solution with a simple driving form and simple structure, and which can protect the contact wire 99 through elastic buffering during the clamping process, the grounding knife 39 is configured as follows: the grounding knife 39 also includes a grounding knife body, a push rod 382, ​​a compression spring 383, a connecting flange 384, a miniature cylinder 385, a quick connector 386, and an insulating air pipe 387. The miniature cylinder 385 serves as the driving component, the quick connector 386 serves as the air source pipe interface of the miniature cylinder 385, and the insulating air pipe 387 serves as the air source pipe.

[0076] The push rod 382 and the compression spring 383 are connected in series to form an intermediate connecting member, and the push rod 382 is connected to the piston rod of the micro cylinder 385 through the intermediate connecting member;

[0077] The miniature cylinder 385 is connected to the grounding switch body via the connecting flange 384. In practical application, the use of an insulated air pipe 387 for the air supply pipe aims to prevent electric shock accidents. The quick connector 386 facilitates the connection and disconnection of corresponding components. The driving mechanism for the miniature cylinder 385 allows for easy access to the power source of the copper busbar 381: compressed gas in a compressed gas cylinder can provide driving force for the miniature cylinder 385. The specific operation process of this solution is as follows: controlling the air supply state of the miniature cylinder 385 via the insulated air pipe 387 enables the miniature cylinder 385 to extend and retract. The copper busbar 381 moves in tandem with this extension and retraction. When the copper busbar 381 contacts the contact wire 99, compression deformation is generated by the compression spring 383, ensuring reliable contact between the copper busbar 381 and the contact wire 99 while preventing damage to the contact wire 99.

[0078] In existing technologies, during the voltage detection and grounding processes, taking the grounding process as an example, as mentioned above, there may be cases where a limit switch malfunction leads to a loose connection. To provide a more accurate determination of the relative positioning of the contact wire 99 to the grounding switch 39, a technical solution is provided that includes a torque detection device 4. This torque detection device 4 is used to detect the torque magnitude when the drive device 7 drives the voltage detection and grounding rod assembly 3 to swing. In this solution, the torque increases after the metal rod 37 with a matching torsion spring contacts the contact wire 99, and the torque increases after the contact wire 99 is embedded in the grounding switch 39 from the open side, with the bottom side of the opening contacting the contact wire 99. This torque feedback provides information on the voltage detection and grounding contact status of the contact wire 99, thereby obtaining a more reliable contact relationship with the contact wire 99. Those skilled in the art can understand that the above torque detection can be based on a torque sensor or by monitoring the current of a servo motor 71, which serves as a power source on the drive device 7.

[0079] To prevent damage to the contact network 99 caused by excessive swinging of the grounding rod assembly 3, a limiting device 8 is included to constrain the swinging stop position of the grounding rod assembly 3 towards the contact network 99. In practical application, the limiting device 8 is configured as a position limiting device located on the swinging trajectory of the grounding rod assembly 3, thereby limiting further swinging of the grounding rod assembly 3.

[0080] To achieve availability detection of detector 36 before use and charging of detector 36 in idle state, so as to optimize the intelligence and automation level of this device, it is configured as follows: it also includes a column 6 fixed on the mounting bracket 1 and a detection device 4 and a charging device 5 connected to the top of the column 6.

[0081] When the grounding rod assembly 3 rotates away from the contact wire 99 under the action of the drive device 7, the detector 36 can rotate to cooperate with the detection device 4 and the charging device 5.

[0082] In the aforementioned cooperative state, the detection device 4 is used to detect whether the detector 36 can work normally, and the charging device 5 is used to charge the detector 36. Based on the existing detector 36 design, to facilitate automation and intelligence, the detector 36 is preferably configured as a detector 36 with wireless charging function and wireless transmission function of voltage detection results. Thus, the charging device 5 preferably adopts a wireless charging module. Regarding the detection device 4, if a third insulating rod 42 is connected to the column 6, and a detection block 41 is connected to the third insulating rod 42, the detection block 41 is a conductor and has an external power supply. Before the detector 36 is officially used for voltage detection of the contact network 99, the detector 36 is energized by contacting the detection block 41 through the metal rod 37. By comparing the voltage detection result of the detector 36 at this time with the known external power supply parameters, it can be determined whether the detector 36 can work normally.

[0083] The existing drive device 7 generally includes a motor and a reducer. Although the reducer has a certain self-locking function, from the perspective of the safety redundancy of the contact network 99 and this device, it is set to also include a locking device 2 fixed on the mounting bracket 1. The locking device 2 is used to lock the voltage testing grounding rod assembly 3 on the mounting bracket 1 when the device is in standby or idle.

[0084] As a technical solution that can change the extension length of the first insulating rod 32 relative to the mounting bracket 1 according to actual application, the voltage testing grounding rod assembly 3 is configured as follows: the voltage testing grounding rod assembly 3 further includes a transition rod 31, the transition rod 31 is connected in series with the first insulating rod 32 and serves as the rear end of the voltage testing grounding rod assembly 3, the voltage testing grounding rod assembly 3 is connected to the driving device 7 through the transition rod 31, and the connection position of the driving device 7 on the transition rod 31 is adjustable along the axial direction of the transition rod 31. The above adjustability is used to realize the extension length of the voltage testing grounding rod assembly 3 relative to the driving device 7.

[0085] Example 3:

[0086] This embodiment further limits the scope of any technical solution provided in any of the above embodiments, such as... Figures 1 to 14 As shown, to facilitate automation, intelligence, or improve the level of automation and intelligence, this embodiment also discloses a contact network 99 voltage detection and grounding control system, including the composite voltage detection and grounding device as described in any of the above, and further including:

[0087] Voltage detection unit: connected to detector 36, used for detecting voltage value or voltage level on contact wire 99;

[0088] Detection unit: used for detecting the resistance value and energized status of the grounding wire 33 on the grounding switch 39;

[0089] Control unit: Used to enable human-machine interaction with the composite voltage detection and grounding device.

[0090] Example 4:

[0091] This embodiment, based on the above embodiments, provides a more detailed and specific implementation plan: a composite voltage detection and grounding device is provided to solve the problems of existing manual operation of voltage detection poles for detection and voltage testing, such as the hook and contact wire 99 being loosely connected, the connection between contact wire 99 and hook being unstable, and the lack of safety protection devices in the drive mechanism.

[0092] Another objective of this solution is to provide a 99-level contact network voltage detection and grounding control system to address the technical problems of existing voltage detection technologies, such as the need for pantograph raising for voltage level detection, the need for manual feedback of voltage detection results, low automation of voltage detection and grounding, and untimely and inaccurate results.

[0093] The composite voltage testing and grounding device consists of a mounting bracket 1, a locking protection device, a composite voltage testing and grounding rod, a testing device 4, a wireless charging device 5, a mounting column 6, a drive device 7, and a limit device 8. It can safely and accurately complete the automatic voltage testing and automatic grounding of the contact network, and provide real-time feedback and display of the results. It is a highly automated and intelligent operating device and system.

[0094] The composite voltage testing grounding rod, capable of rotating around the output shaft of the reducer, includes:

[0095] The transition rod 31 has one end connected to the output shaft of the reducer via the clamping device 73, and the other end connected to the insulating rod 1;

[0096] Insulating rod one, one end is connected to transition rod 31, and the other end is equipped with a voltage detection and grounding device;

[0097] Connecting block 34 is set between the voltage testing device and the insulating rod 1, and serves to connect and fix it.

[0098] Insulating rod two is installed on connecting block 34 to ensure high-voltage insulation between connecting block 34 and detector 36;

[0099] Detector 36, installed on insulating rod two, can sense the voltage level and feed it back to the control system in real time via wireless signal, and can also issue an audible and visual alarm.

[0100] Metal rod 37 is set on detector 36, which connects contact wire 99 and detector 36, and drives the voltage detection device to rotate around connecting block 34.

[0101] Grounding switch 39 is connected to insulating rod 1 via connecting flange 384 and hung on contact wire 99;

[0102] The pressure block device 38 is installed on the connecting flange 384. The push rod 382 is pulled by the micro cylinder 385, which causes the compression spring 383 to retract. When the grounding knife 39 is connected to the contact wire 99, the servo motor 71 detects the change in torque and stops. The micro cylinder 385 pushes the push rod 382, ​​the compression spring 383 returns to its original state, and pushes the copper busbar 381 toward the contact wire 99, so that the contact wire 99 and the grounding knife 39 are tightly connected.

[0103] The grounding copper wire connects one end to the grounding knife 39 and the other end to the earth, ensuring safe connection between the contact network 99 and the earth.

[0104] A locking protection device can lock and protect the composite voltage testing and grounding rod in the standby state of the equipment, including:

[0105] The proximity sensor 23, located on the side of the locking block 22, can sense the composite grounding rod and send a stop signal.

[0106] The ultra-thin cylinder is connected to the locking block 22 and can drive the locking block 22 to move forward and backward.

[0107] Locking block 22, one end is connected to an ultra-thin cylinder, and the other end can lock and release the composite voltage testing grounding rod.

[0108] The detection device 4 can detect the quality of the detector 36, including:

[0109] The detection block 41 is installed at one end of the insulating rod 3 and connected to the power supply through a wire. Before the detector 36 is used, the metal rod 37 is turned on to apply voltage to the detector 36 and detect whether the detector 36 is good or bad.

[0110] The third insulating rod is installed between the detection block 41 and the connecting flange 384 seat 43 to provide insulation and isolation.

[0111] Connecting flange 384 seat 43, one end is connected to insulating rod three, and the other end is connected to mounting column 6.

[0112] The wireless charging device 5 can wirelessly charge the battery of the detector 36, ensuring that the detector 36 has sufficient power.

[0113] Drive device 7, capable of rotating the composite voltage testing grounding rod, includes:

[0114] The servo motor 71 is connected to the input end of the worm gear reducer 72 to provide power for rotation;

[0115] The worm gear reducer 72 has one input end connected to the servo motor 71, the other input end connected to the coupling, and the output end connected to the clamping device 73.

[0116] The clamping device 73 is connected to the output end of the reducer and can clamp the transition rod 31;

[0117] A diaphragm coupling 74 is connected at one end to the input end of the reducer and at the other end to a handwheel 79.

[0118] Bearing housing 75 is connected to the coupling shaft and serves to support rotation.

[0119] Mounting base 76 is connected to mounting bracket 1 and can connect to reducer and bearing housing 75;

[0120] Handwheel 79 can be connected to the coupling shaft for emergency use in case of motor failure.

[0121] Limit device 8 can prevent over-limit alarms caused by the grounding switch 39 not being connected to the contact wire 99, including:

[0122] Limit sensor 82, installed on connector 81, can sense when the composite voltage detection grounding rod exceeds the limit and send a stop and over-limit signal;

[0123] Connector 81, with column 6 installed at one end and limit sensor 82 installed at the other end.

[0124] The overhead contact line 99 voltage detection and grounding control system includes the composite voltage detection and grounding device as described above, and also includes:

[0125] The voltage detection unit includes a receiver that can receive voltage values ​​or voltage levels.

[0126] The detection unit, including a voltage sensor, a current sensor, and a relay, is used to detect the resistance value and energized state of the grounding copper wire to ensure reliable grounding.

[0127] The control cabinet, including voltage testing operation buttons, grounding operation buttons, HIM screen, control cabinet, etc., is used for personnel to operate and control the composite voltage testing and grounding device;

[0128] Monitoring software, including application software, is used for online real-time monitoring and anomaly alarms, historical data querying, and interaction with other systems.

[0129] Before using the composite voltage detection and grounding device, the contact network 99 needs to be de-energized. First, the operator submits a power-off request. After the maintenance dispatch confirms that the pantograph of the EMU has been lowered, all personnel have been evacuated, the isolating switch monitoring is normal, and the monitoring software shows that the status of each module of the equipment is normal, the operator confirms that the status of the on-site equipment is normal before approving the power-off request. The operator performs the power-off through the on-site control cabinet of the safety interlock monitoring system. After the dispatcher approves, the operator presses the "warning" button to broadcast three warnings. After the warning broadcast in the depot is completed, the on-site dispatcher requests the opening instruction from the maintenance dispatcher. After receiving the request from the on-site dispatcher and checking and confirming, the maintenance dispatcher issues the "open" instruction signal for that track. After the operator and the on-site dispatcher confirm that the "openable indicator light" is on, the operator presses the "open" button (for more than 3 seconds). The operator and the on-site dispatcher jointly confirm that the "no power" light on the isolating switch control cabinet is on, the "no power" display board shows "no power", and the isolating switch disconnector is in the open position.

[0130] The operation of the composite voltage testing and grounding device is as follows: the operator controls the power supply of the detection device 4 through the control cabinet to test whether the detector 36 is normal. If it is normal, the operator controls the composite voltage testing and grounding rod to perform automatic voltage testing. If the contact network 99 shows that there is electricity, and the voltage is greater than 5KV, it is necessary to discharge the device as appropriate. If the voltage is not greater than 5KV or there is no electricity, the automatic grounding operation is performed normally. After the automatic grounding rod is grounded, the voltage testing device shows no electricity, the control system displays "no electricity" and "pole hanging". After safety reset, the manual grounding rod hanging operation is performed.

[0131] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific embodiments of the present invention are limited to these descriptions. For those skilled in the art, other embodiments derived without departing from the technical solution of the present invention should be included within the scope of protection of the present invention.

Claims

1. A composite voltage detection and grounding device, characterized in that, It includes a mounting bracket (1), a drive device (7) fixed on the mounting bracket (1), and a voltage testing grounding rod assembly (3) connected to the output end of the drive device (7). The voltage detection grounding rod assembly (3) includes a first insulating rod (32), a grounding knife fixed on the first insulating rod (32), a detector (36) rotatably connected to the first insulating rod (32) and used for voltage detection, and a metal rod (37) serving as the metal head of the detector (36). The driving device (7) is connected to the rear end of the first insulating rod (32) and is used to drive the first insulating rod (32) to swing, forming the rotatable connection shaft and the swinging shaft are parallel to each other; The grounding knife and detector (36) are both located at the front end of the first insulating rod (32). In the free state, the front end of the metal rod (37) is located on the opening side of the grounding knife. The opening side and the metal rod (37) are arranged side by side along the extension direction of the contact wire (99). The voltage detection and grounding rod assembly (3) also includes a connecting block (34) and a second insulating rod (35). The connecting block (34) is fixed on the first insulating rod (32). The rear end of the second insulating rod (35) is rotatably connected to the connecting block (34). The rear end of the detector (36) is fixedly connected to the front end of the second insulating rod (35) so that the metal rod of the detector and the contact wire are always in contact during voltage detection and grounding functions.

2. The composite voltage detection and grounding device according to claim 1, characterized in that, The grounding switch includes a copper busbar (381) for forming the boundary of the contact wire (99) clamping gap; It also includes a drive for moving the copper busbar (381) to change the width of the clamping gap.

3. A composite voltage detection and grounding device according to claim 2, characterized in that, The grounding switch also includes a grounding switch body, and the grounding switch also includes a push rod (382), a compression spring (383), a connecting flange (384), a miniature cylinder (385), a quick connector (386), and an insulating air pipe (387). The miniature cylinder (385) serves as the driving component, the quick connector (386) serves as the air source pipe interface of the miniature cylinder (385), and the insulating air pipe (387) serves as the air source pipe. The push rod (382) and the compression spring (383) are connected in series to form an intermediate connecting member, and the push rod (382) is connected to the piston rod of the micro cylinder (385) through the intermediate connecting member; The miniature cylinder (385) is connected to the grounding switch body via the connecting flange (384).

4. A composite voltage detection and grounding device according to claim 1, characterized in that, It also includes a torque detection device, which is used to detect the magnitude of the torque of the drive device (7) when driving the grounding rod assembly (3) to swing.

5. A composite voltage detection and grounding device according to claim 1, characterized in that, It also includes a limiting device (8) for constraining the swing stop position of the grounding rod assembly (3) toward the contact wire (99).

6. A composite voltage detection and grounding device according to claim 1, characterized in that, It also includes a column (6) fixed on the mounting bracket (1) and a detection device (4) and a charging device (5) connected to the top of the column (6). When the grounding rod assembly (3) rotates away from the contact network (99) under the action of the driving device (7), the detector (36) can rotate to cooperate with the detection device (4) and the charging device (5); In the aforementioned cooperative state, the detection device (4) is used to detect whether the detector (36) can work normally, and the charging device (5) is used to charge the detector (36).

7. A composite voltage detection and grounding device according to claim 1, characterized in that, It also includes a locking device (2) fixed on the mounting bracket (1), which is used to lock the grounding rod assembly (3) on the mounting bracket (1) when the device is in standby or idle.

8. A composite voltage detection and grounding device according to claim 1, characterized in that, The voltage testing grounding rod assembly (3) also includes a transition rod (31), which is connected in series with the first insulating rod (32) and serves as the rear end of the voltage testing grounding rod assembly (3). The voltage testing grounding rod assembly (3) is connected to the driving device (7) through the transition rod (31), and the connection position of the driving device (7) on the transition rod (31) is adjustable along the axial direction of the transition rod (31). The above adjustment is used to realize the extension length of the voltage testing grounding rod assembly (3) relative to the driving device (7).

9. A contact network voltage detection and grounding control system, characterized in that, The composite voltage detection and grounding device as described in any one of claims 1 to 8 further includes: Voltage detection unit: connected to detector (36) for detecting voltage value or voltage level on contact wire (99); Detection unit: used for detecting the resistance value and energized status of the grounding wire (33) on the grounding switch; Control unit: Used to enable human-machine interaction with the composite voltage detection and grounding device.

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