Portable checking and discharging electric rod for metro overhead line system

Abstract

The utility model provides a portable checking and discharging electric rod for a subway overhead line system. The portable checking and discharging electric rod comprises a checking and discharging electric connecting rod mechanism, an operating rod and a grounding mechanism. One end of the checking and discharging electric connecting rod mechanism is connected with the front end of the operating rod, a connecting mechanism detachably connected with the grounding mechanism is arranged between the checking and discharging electric connecting rod mechanism and the operating rod, and the operating rod is connected with the checking and discharging electric connecting rod mechanism through the connecting mechanism; the checking discharge electric connecting rod mechanism comprises a conductive hanging rod, an insulating rod and a measuring terminal; the conductive hitching rod is connected to the upper end of the insulating rod and is used for hitching a subway overhead line system after power failure; the lower end of the insulating rod is connected with a connecting mechanism and is detachably connected with an operating rod through the connecting mechanism, the operating rod and the insulating rod are coaxially arranged, the measuring terminal is electrically connected with the conductive hanging rod through a connecting wire in the insulating rod, the measuring terminal can be used for detecting the residual voltage of the overhead line system after power failure, and the measuring terminal is further electrically connected with a grounding mechanism. On-site rapid assembly and disassembly are facilitated, the preparation time before operation is shortened, and the operation efficiency is improved.

Description

Technical Field

[0001] This application belongs to the field of urban rail transit power supply contact network technology, and particularly relates to a portable discharge tester for subway contact networks. Background Technology

[0002] In recent years, the construction of urban rail transit subways in major cities across the country has taken shape, and they have played a significant role in alleviating urban traffic congestion and facilitating travel, and have played a major role in promoting urban economic development.

[0003] Currently, in urban rail transit subway operations, trains tend to depart earlier and return later. This results in less effective maintenance time for lines and equipment after power outages in the overhead contact system sections following train shutdowns. At present, during maintenance work on the subway power supply overhead contact system after power outages, some lines often exhibit high residual voltage, sometimes exceeding 1000V. This high residual voltage is caused by severe weather or aging of the power supply system itself. This phenomenon is particularly prevalent in older subway projects, becoming a significant challenge for maintenance work.

[0004] When maintenance work must be carried out during power outages due to high residual voltage in the overhead contact line, current methods either involve leaving the line stationary by suspending multiple traditional voltage detectors to allow the residual voltage to decrease, or directly connecting a grounding device to forcibly reduce the voltage to ground. These methods are prone to safety hazards. In such critical situations, these pre-work procedures undoubtedly prolong the overall maintenance time, hindering efficiency and compromising the safety of personnel and equipment, posing significant safety risks. Utility Model Content

[0005] This application provides a portable discharge tester for subway overhead contact lines, which solves the problems of low work efficiency and significant safety hazards caused by using static treatment to wait for the residual voltage to decrease when there is a high residual voltage in the subway overhead contact line during power outage maintenance operations, as well as the problem of forcibly reducing the voltage by directly connecting a grounding device.

[0006] This application provides a portable discharge tester for subway overhead contact lines, including a discharge tester linkage mechanism, an operating rod, and a grounding mechanism;

[0007] One end of the discharge detection linkage mechanism is connected to the front end of the operating rod. A detachable connection mechanism for the grounding mechanism is provided between the discharge detection linkage mechanism and the operating rod. The operating rod is connected to the discharge detection linkage mechanism through the connection mechanism.

[0008] The discharge detection linkage mechanism includes a conductive hook rod, an insulating rod, and a measuring terminal. The conductive hook rod is connected to the upper end of the insulating rod and is used to hook onto the subway contact network after power failure. The lower end of the insulating rod is connected to the connecting mechanism and is detachably connected to the operating rod arranged coaxially with the insulating rod. The operating rod is a telescopic operating rod. The measuring terminal is installed in the rear section of the insulating rod and is electrically connected to the conductive hook rod through a connecting wire inside the insulating rod. The measuring terminal can be used to detect the residual voltage of the contact network after power failure and is also electrically connected to the grounding mechanism.

[0009] In an optional embodiment, the connection mechanism includes a conductive connecting post, an insulating sleeve, and a grounding plug. One end of the insulating sleeve is threadedly connected to the operating rod. The conductive connecting post is fixedly disposed inside the insulating sleeve. The grounding plug is laterally inserted into the side of the insulating sleeve and is inserted together with the conductive connecting post. The connection mechanism is detachably connected to the grounding plug. A conductive connecting cylinder for connecting to the conductive connecting post is fixedly disposed inside the lower end of the insulating rod. The conductive connecting cylinder has a threaded connection hole inside the end connected to the conductive connecting post. The conductive connecting cylinder is threadedly connected to the conductive connecting post. The conductive connecting cylinder is electrically connected to the measuring terminal through a connecting wire inside the insulating rod.

[0010] In an optional embodiment, the grounding mechanism includes a grounding plug, a grounding wire, and a grounding clamp. One end of the grounding plug is detachably inserted into the grounding socket, one end of the grounding wire is connected to the grounding plug, and the other end of the grounding wire is connected to the grounding clamp.

[0011] In an optional embodiment, the operating rod is made of fiberglass reinforced plastic (GFRP) tubing, and the maximum extended length of the operating rod is 4 meters, and the minimum retracted length is 1.2 meters.

[0012] In one optional embodiment, the measuring terminal uses a plastic square box shell, and a circuit board is installed inside the measuring terminal, the circuit board integrating a wireless communication unit.

[0013] In one optional embodiment, the insulating rod is a hollow tube structure, the insulating rod is made of fiberglass, and the conductive hanging rod is an integral structure made of aluminum.

[0014] In one optional embodiment, the grounding clamp is a copper-coated alligator clamp used to clamp the rail; the grounding wire is a plastic-coated copper wire with a specification of 2.5mm²; and the end of the grounding plug that connects to the grounding plug is a tin-plated copper conductive plug.

[0015] In an optional embodiment, the insulating rod includes insulating rod I and insulating rod II, which are connected by a conductive connecting rod. Insulating rod I is connected to insulating rod II, and insulating rod II is used to connect to the operating rod. The conductive connecting rod is a columnar structure that is larger in the middle and smaller at both ends. The two ends of the conductive connecting rod are respectively connected to insulating rod I and insulating rod II. A protective sleeve made of insulating material is also provided at the connection between insulating rod I and insulating rod II to prevent the conductive part of the conductive connecting rod from being exposed. The measuring terminal is electrically connected to the conductive connecting rod through a connecting wire, and then electrically connected to the conductive hanging rod through the conductive connecting rod and the connecting wire. The measuring terminal is installed on the insulating rod II.

[0016] In an optional embodiment, a mounting sleeve for mounting the measuring terminal is threaded through the insulating rod II, and a flat end is provided on the side of the mounting sleeve. The measuring terminal is fixedly mounted on the flat end of the side of the mounting sleeve by screws.

[0017] In an optional implementation, a handheld terminal is also included, which is wirelessly connected to the measurement terminal.

[0018] Compared with the prior art, this application has the following beneficial effects:

[0019] 1. This application provides a portable discharge tester for subway overhead contact lines, as described in this embodiment. By setting a connecting mechanism between the discharge tester linkage mechanism and the operating rod, a detachable connection of the grounding mechanism can be achieved, facilitating rapid assembly and disassembly at different work sites. The connecting mechanism organically combines the discharge tester linkage mechanism, the operating rod, and the grounding mechanism into one unit, forming a complete discharge circuit. Compared to traditional fixed or complex on-site connection methods, this structure can quickly establish a discharge circuit, effectively reducing preparation and disassembly time before operation and improving overall work efficiency.

[0020] 2. The operating rod used in this application is a telescopic operating rod. This allows the operating rod to reach a greater distance from the contact wire connection point when extended, and to be easily carried and transported when retracted. As a result, maintenance personnel do not need to carry heavy or excessively long fixed rods when performing connection work; the length can be flexibly adjusted according to the working space, making it easier to access contact wires at different heights, shortening on-site preparation time, and facilitating the carrying and storage of tools.

[0021] 3. In this application, the insulating rod is connected to the conductive connecting rod to form an insulating isolation structure. The measuring terminal is installed at the rear end of the insulating rod and connected to the conductive connecting rod via a wire, enabling real-time detection of the residual voltage state of the contact network after power failure. The entire process of voltage detection and discharge is directly detected and fed back by the measuring terminal, avoiding direct contact between personnel and live parts. This not only reduces the risk of electric shock to on-site workers but also ensures equipment safety, objectively improving the overall safety factor of maintenance work and the reliability of on-site operations. Attached Figure Description

[0022] 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the structure of a portable electric discharge tester for subway overhead contact lines provided in an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the structure of a discharge detection linkage mechanism provided in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the structure of a connection mechanism provided in one embodiment of this application;

[0026] Figure 4 An exploded view of a connection mechanism provided in an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the grounding mechanism provided in one embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the structure of a conductive link provided in an embodiment of this application;

[0029] Figure 7 This is a schematic diagram of the structure of an installation sleeve provided in one embodiment of this application;

[0030] Figure 8 This is a schematic diagram of the structure of a conductive connecting cylinder provided in an embodiment of this application;

[0031] Figure 9 A schematic diagram of the structure of a portable electric discharge tester for subway overhead contact lines provided in another embodiment of this application;

[0032] Figure 10 A schematic diagram of the structure of a portable electric discharge tester for subway overhead contact lines provided in another embodiment of this application;

[0033] Figure 11 A schematic diagram of a handheld terminal on a joystick provided in an embodiment of this application;

[0034] Figure 12 This is a schematic diagram of a portable electric discharge tester for subway overhead contact lines provided in an embodiment of this application, when it is attached to the overhead contact line.

[0035] Explanation of reference numerals in the attached figures:

[0036] 100-Discharge testing linkage mechanism; 110-Conductive hanging rod; 120-Insulating rod; 1201-Conductive connecting cylinder; 121-Insulating rod I; 122-Insulating rod II; 123-Conductive connecting rod; 124-Protective cylinder; 130-Measuring terminal; 131-Mounting sleeve; 200-Operating rod; 210-Fixing sleeve; 300-Grounding mechanism; 310-Grounding plug; 320-Grounding wire; 330-Grounding clamp; 400-Connecting mechanism; 410-Conductive connecting post; 420-Insulating sleeve; 430-Grounding plug; 500-Handheld terminal; 510-Putting pad. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0038] Please see Figures 1-12 This application provides a portable discharge tester for subway overhead contact lines, including a discharge tester linkage mechanism 100, an operating rod 200, and a grounding mechanism 300.

[0039] One end of the discharge detection linkage mechanism 100 is connected to the front end of the operating rod 200. A connecting mechanism 400 for detachable grounding mechanism 300 is provided between the discharge detection linkage mechanism 100 and the operating rod 200. The operating rod 200 is connected to the discharge detection linkage mechanism 100 through the connecting mechanism 400.

[0040] The discharge detection linkage mechanism 100 includes a conductive hook rod 110, an insulating rod 120, and a measuring terminal 130. The conductive hook rod 110 is connected to the upper end of the insulating rod 120 and is used to hook onto the subway contact network after power failure. The lower end of the insulating rod 120 is connected to a connecting mechanism 400, and an operating rod 200 arranged coaxially with the insulating rod 120 is detachably connected through the connecting mechanism 400. The operating rod 200 is a telescopic operating rod. The measuring terminal 130 is installed in the rear section of the insulating rod 120. The measuring terminal 130 is electrically connected to the conductive hook rod 110 through a connecting wire inside the insulating rod 120. The measuring terminal 130 can be used to detect the residual voltage of the contact network after power failure. The measuring terminal 130 is also electrically connected to the grounding mechanism 300.

[0041] The portable discharge tester for subway overhead contact lines provided in this embodiment allows for the detachable connection of the grounding mechanism 300 by setting a connecting mechanism 400 between the discharge tester linkage mechanism 100 and the operating rod 200, facilitating rapid assembly and disassembly at different work sites. The connecting mechanism 400 organically integrates the discharge tester linkage mechanism 100, the operating rod 200, and the grounding mechanism 300 into a single unit, forming a complete discharge circuit. Compared to traditional fixed or complex on-site connection methods, this structure enables rapid establishment of the discharge circuit, effectively reducing preparation and disassembly time before operation and improving overall work efficiency.

[0042] Meanwhile, the operating rod 200 used in this embodiment is a telescopic operating rod. This allows the operating rod 200 to be extended to reach a distant contact wire splicing position when extended, and retracted for easy carrying and transportation. As a result, maintenance personnel do not need to carry heavy or excessively long fixed rods when performing splicing operations. The length can be flexibly adjusted according to the working space, making it easier to access contact wires at different heights, shortening on-site preparation time, and facilitating the carrying and storage of tools.

[0043] Furthermore, in this embodiment, the insulating rod 120 is connected to the conductive connecting rod 110 to form an insulating isolation structure. The measuring terminal 130 is installed at the rear end of the insulating rod 120 and connected to the conductive connecting rod 110 via a wire, enabling real-time detection of the residual voltage state of the contact network after power failure. The entire process of voltage detection and discharge is directly detected and fed back by the measuring terminal 130, avoiding direct contact between personnel and live parts. This not only reduces the risk of electric shock to on-site workers but also ensures equipment safety, objectively improving the safety factor of the overall maintenance work and the reliability of on-site operations.

[0044] In some embodiments, such as Figures 2-4As shown, the connection mechanism 400 includes a conductive connecting post 410, an insulating sleeve 420, and a grounding plug 430. One end of the insulating sleeve 420 is threadedly connected to the operating rod 200. The conductive connecting post 410 is fixedly installed inside the insulating sleeve 420. The grounding plug 430 is laterally inserted into the side of the insulating sleeve 420 and is inserted together with the conductive connecting post 410. The connection mechanism 400 is detachably connected to the grounding plug 430. A conductive connecting tube 1201 for connecting to the conductive connecting post 410 is fixedly installed inside the lower end of the insulating rod 120. Figure 8 A schematic diagram of a usable conductive connecting cylinder 1201 is shown. The conductive connecting cylinder 1201 has a threaded connection hole inside at one end that is connected to the conductive connecting post 410. The conductive connecting cylinder 1201 is threadedly connected to the conductive connecting post 410. The conductive connecting cylinder 1201 is electrically connected to the measuring terminal 130 through the connecting wire inside the insulating rod 120.

[0045] In the above embodiments, the connection mechanism 400 of this application adopts a threaded connection between the insulating sleeve 420 and the operating rod 200, and a conductive connecting post 410 is provided inside the insulating sleeve 420. This structure not only makes the connection more robust and reliable, but also effectively reduces the possibility of loosening at the connection. When assembling the discharge test rod on site, operators only need to complete the connection of the operating rod 200 with a simple rotation action, significantly reducing the difficulty of operation. On-site personnel can therefore quickly assemble and disassemble the equipment, shortening the preparation time and simplifying the subsequent maintenance and parts replacement process.

[0046] Furthermore, the conductive connecting post 410 is embedded within the insulating sleeve 420, and the grounding plug 430 located on the side is laterally plugged into the conductive connecting post 410. This lateral arrangement effectively insulates the conductive connecting post 410, reducing the risk of accidental electric shock caused by exposed electrical parts. On the other hand, it also makes the plug-in connection between the grounding plug 430 and the connecting post more secure, forming a stable electrical connection circuit, improving the safety of the discharge testing process, and reducing the risk to operators from accidentally touching conductive parts.

[0047] In addition, a conductive connecting cylinder 1201 is installed inside the insulating rod 120. The conductive connecting cylinder 1201 is connected to the conductive connecting post 410 via a threaded connection, and further connected to the measuring terminal 130 via an internal connecting wire. This design makes the electrical connection stable and reliable, and makes on-site operation and assembly more convenient and quick. This stable electrical connection method enables the measuring terminal 130 to collect the residual voltage data of the contact network more accurately. On-site personnel do not need to directly contact live parts at close range, which improves the detection accuracy, reduces the risk of electric shock, and also improves the efficiency and reliability of on-site operations.

[0048] In some embodiments, such as Figure 1 and Figure 5 As shown, the grounding mechanism 300 includes a grounding plug 310, a grounding wire 320, and a grounding clamp 330. One end of the grounding plug 310 is detachably inserted into the grounding plug 430. One end of the grounding wire 320 is connected to the grounding plug 310, and the other end of the grounding wire 320 is connected to the grounding clamp 330.

[0049] This embodiment includes three components in the grounding mechanism 300: a grounding plug 310, a grounding wire 320, and a grounding clamp 330. The grounding plug 310 is a plug-in structure that can be plugged into and disconnected from the grounding socket 430. This design allows for quick assembly or disassembly of the grounding wire, reducing the inconvenience of connecting traditional fixed grounding structures in the field, and also facilitating transport and replacement.

[0050] Meanwhile, the grounding wire 320 in this embodiment uses plastic-coated copper wire with a specification of 2.5mm², which provides both good conductivity and excellent insulation. The grounding wire 320 is of moderate length and highly flexible, facilitating flexible laying of the grounding line by maintenance personnel. This reduces the on-site operational difficulties that might have been caused by insufficient or excessive length of rigid wires in the past, and also reduces the risks associated with wire damage, thereby improving the convenience of on-site maintenance operations.

[0051] From a connection perspective, the grounding clamp 330 uses a plastic-coated alligator clamp made of copper, which has strong clamping force and reliable conductivity, allowing for quick and secure connection to the subway rail or negative terminal, providing effective conductivity for the discharge circuit. In this embodiment, the plug-and-play connection between the grounding plug 310 and the grounding socket 430 allows for quick installation or removal of the overall electrical connection, reducing the likelihood of wiring errors. This significantly reduces the risks caused by loose connections or poor contact, further improving the safety of the on-site discharge testing process.

[0052] In some embodiments, the operating lever 200 is made of fiberglass reinforced plastic (GFRP) material, and the maximum extended length of the operating lever 200 is 4 meters, and the minimum retracted length is 1.2 meters.

[0053] The operating lever 200 in this embodiment is made of fiberglass reinforced plastic (GFRP) tubing. GFRP tubing possesses high insulation strength and is lightweight, reducing the risk of electric shock due to the lever's conductivity during operation and minimizing physical strain during maintenance. Structurally, the operating lever 200 is designed as a telescopic structure, with a maximum extended length of 4 meters and a minimum retracted length of 1.2 meters, adapting to the length requirements of different maintenance scenarios. For maintenance at heights, the lever can be extended for remote operation; after completion, it can be quickly retracted for carrying and storage. Compared to fixed-length levers, this telescopic structure enhances the flexibility of maintenance operations, saves preparation time, and improves on-site work efficiency to a certain extent.

[0054] Furthermore, the operating rod 200 and the discharge detection linkage mechanism 100 are connected via the connecting mechanism 400, forming a relatively stable overall structure. The excellent insulation properties of the fiberglass material, combined with the stability of the connecting mechanism 400, reduce safety hazards caused by conductivity or weak connections during on-site assembly. Meanwhile, the 1.2-meter length in the retracted state makes the overall design more compact, facilitating quick assembly and disassembly by operators and improving the convenience of on-site operations.

[0055] In some embodiments, the measuring terminal 130 uses a plastic-cased square box as its outer shell, which is the core area for voltage measurement. The measuring terminal 130 has a circuit board inside, which integrates a wireless communication unit. Mounting holes are provided on the back of the measuring terminal 130 for installation. Optionally, the panel of the measuring terminal 130 includes a power display area, a power switch, an audible and visual alarm light, and a battery charging port. In practical applications, the internal circuit board structure of the measuring terminal 130 mainly consists of a microcontroller and supporting auxiliary electronic components. In specific design and use, the circuit board can be equipped with a voltage detection unit, a discharge unit, a control unit, a battery power supply unit, an operation unit, a display unit, and an audible and visual unit, depending on the specific requirements of the application. Since the focus of this application is not on the functional design of the circuit board, the various functional units of the circuit board will not be described in detail in this embodiment.

[0056] In the above embodiments, the measuring terminal 130 uses a plastic rectangular box as its outer shell. The plastic shell has good insulation properties, which can reduce the possibility of voltage or current leakage to a certain extent. At the same time, the rectangular box shape helps to stably install and fix the circuit board and other electronic components, reducing the probability of the circuit board being damaged by external impact, thereby improving the durability and reliability of the measuring terminal 130 during use.

[0057] Meanwhile, in this embodiment, a circuit board is configured inside the measurement terminal 130, and the wireless communication unit is directly integrated on the circuit board, making the overall structure more compact. This makes the measurement terminal 130 relatively small in size and weight, making it convenient for on-site maintenance personnel to hold or perform related operations, reducing the burden of use, and also improving portability and operational efficiency to a certain extent.

[0058] Furthermore, the built-in wireless communication unit of the measurement terminal 130 can wirelessly communicate with the handheld terminal 500, eliminating the need for cumbersome wiring between the test strip and the handheld terminal. This not only reduces the risk of misoperation due to wiring but also improves operator safety to some extent. At the same time, the wireless connection eliminates the need for on-site wiring, shortens preparation time, and makes operation simpler and more efficient.

[0059] In some embodiments, the insulating rod 120 is a hollow tube structure, the insulating rod 120 is made of fiberglass, and the conductive hanging rod 110 is an integral structure made of aluminum.

[0060] The insulating rod 120 in this embodiment adopts a hollow tube structure design. This design significantly reduces the overall weight of the rod, alleviating the physical burden on on-site personnel during carrying and operation. Simultaneously, this hollow structure allows for better arrangement of internal connecting wires, preventing them from being directly exposed to the external environment, reducing the possibility of wire wear or damage, and improving the overall structural safety and durability.

[0061] Furthermore, the insulating rod 120 is made of fiberglass, a material known for its excellent insulation and corrosion resistance. This material is not only non-conductive but also provides relatively stable and durable insulation, effectively reducing the possibility of high-voltage current being conducted through the rod and thus significantly lowering the risk of electric shock to workers. In actual operation, the safety of workers holding the electric shock tester is also enhanced.

[0062] In addition, the conductive mounting rod 110 is made of aluminum in a one-piece structure. Aluminum has excellent conductivity and high mechanical strength, which facilitates quick and stable effective contact with the contact wire, and effectively guides the residual voltage of the contact wire into the measuring terminal 130. Furthermore, the one-piece aluminum structure also has high mechanical strength and rigidity, which can reduce deformation or damage during mounting, help improve the stability of voltage signal transmission and the accuracy of voltage detection data, and further reduce the frequency of daily maintenance and equipment damage.

[0063] In some embodiments, the grounding clamp 330 is a copper-coated alligator clamp used to clamp the rail; the grounding wire 320 is a plastic-coated copper wire with a specification of 2.5mm²; and the grounding plug 310 is a tin-plated copper conductive plug at the end that connects to the grounding plug 430.

[0064] In this embodiment, the grounding clamp 330 is a copper-coated alligator clamp, which provides a relatively stable electrical connection when clamping the rail. Copper itself has good conductivity, which can quickly guide residual current in the line to the rail. The alligator clamp structure has strong grip on the rail and is not easy to fall off. It can also reduce the risk of discharge circuit interruption or electrical accident caused by loose connection to a certain extent, thereby enhancing the safety and reliability of the overall discharge operation.

[0065] The 320 grounding wire uses plastic-coated copper wire with a specification of 2.5mm², which can effectively conduct large currents during discharge while avoiding overheating or burning caused by excessively thin wires. Its outer plastic coating provides the wire with higher insulation and protection properties, reducing the risk of damage to the wire when subjected to friction or other adverse environmental factors, thereby further improving the safety and service life of the grounding wire.

[0066] The grounding plug 310 uses a tin-plated copper conductive plug structure, which forms a relatively stable electrical connection after being inserted into the grounding socket 430. The tin-plated copper surface is smooth and corrosion-resistant, and is not prone to oxidation or rust during long-term use, thus maintaining good conductivity at the plug-in connection to a certain extent. This quick-plug design simplifies the connection steps in the field, improves operational efficiency, reduces the probability of misoperation, and reduces the possibility of grounding connection failures.

[0067] In some embodiments, such as Figure 2 As shown, the insulating rod 120 includes insulating rod I 121 and insulating rod II 122, which are connected by a conductive connecting rod 123. Insulating rod I 121 is connected to insulating rod II 122, and insulating rod II 122 is used to connect to the operating rod 200, as shown. Figure 6 As shown, the conductive connecting rod 123 is a columnar structure that is larger in the middle and smaller at both ends. The two ends of the conductive connecting rod 123 are connected to the insulating rod I 121 and the insulating rod II 122 respectively. A protective cylinder 124 is also provided at the connection between the insulating rod I 121 and the insulating rod II 122 to prevent the conductive part of the conductive connecting rod 123 from being exposed. The protective cylinder 124 is made of insulating material. The measuring terminal 130 is electrically connected to the conductive connecting rod 123 through the connecting wire, and then electrically connected to the conductive hanging rod 110 through the conductive connecting rod 123 and the connecting wire. The measuring terminal 130 is installed on the insulating rod II 122.

[0068] In this embodiment, the insulating rod 120 adopts a two-section design, consisting of insulating rod I 121 and insulating rod II 122, which are connected by a conductive connecting rod 123. This segmented structure can reduce the difficulty of manufacturing, transporting, and storing the rod to a certain extent, and facilitates rapid on-site assembly. Compared with the traditional single long rod structure, this design makes the discharge test rod more compact in size after disassembly, more convenient to carry, and more flexible in operation.

[0069] The conductive connecting rod 123 adopts a columnar structure that is larger in the middle and smaller at both ends. This design ensures a suitable contact area when the conductive connecting rod is connected to the insulating rod I 121 and the insulating rod II 122, reducing the possibility of loosening or shaking at the connection point. In addition, this columnar structure provides a certain degree of mechanical support while providing conductivity, which helps maintain the stability of the rod body after connection, thereby improving the safety and reliability of the overall connection.

[0070] At the connection between insulating rod I 121 and insulating rod II 122, an additional protective sleeve 124 made of insulating material is installed to reduce the risk of the conductive connecting rod 123 being exposed. This can, to some extent, prevent operators from touching live parts during maintenance, thereby further reducing operational risks. Meanwhile, the measuring terminal 130 is installed on insulating rod II 122 and connected to the conductive connecting rod 123 via a wire. It is then connected to the conductive hanging rod 110 via the conductive connecting rod 123 and connecting wires, enabling the measuring terminal 130 to more accurately obtain the residual voltage data of the contact network, improving the reliability and accuracy of voltage detection data transmission.

[0071] In some embodiments, such as Figure 2 and Figure 7 As shown, an installation sleeve 131 for mounting the measuring terminal 130 is threaded through the insulating rod II 122, as... Figure 7 As shown, the side of the mounting sleeve 131 is provided with a flat end, and the measuring terminal 130 is fixedly mounted on the flat end of the side of the mounting sleeve 131 by screws.

[0072] In this embodiment, a mounting sleeve 131 is added to the insulating rod II 122 for mounting the measuring terminal 130. The mounting sleeve 131 surrounds and passes through the outside of the insulating rod II 122, which not only makes the connection between the measuring terminal 130 and the insulating rod II 122 more stable, but also effectively reduces the risk of wear or loosening caused by direct contact between the two, thereby improving the installation firmness of the measuring terminal 130 to a certain extent. It can also reduce the impact of external forces or vibrations on the measuring terminal 130, and avoid displacement or loosening of the measuring terminal during operation.

[0073] The mounting sleeve 131 has a specially designed flat end on its side to provide a relatively stable and appropriately sized mounting base. The measuring terminal 130 is fixed to this flat end with screws, further enhancing the stability of the installation connection. Compared to traditional binding or clip methods, screw fixing offers superior strength and accuracy, and is also easier for later maintenance and disassembly.

[0074] Furthermore, through the structural combination of the mounting sleeve 131 and the flat end, the measuring terminal 130 can be stably mounted on the insulating rod II 122, forming a relatively reliable electrical connection with the internal wires. This method can reduce the possibility of poor contact or data errors when the measuring terminal 130 is not securely installed, which helps to improve the reliability and accuracy of the detection data and also enhances the safety of the discharge detection process to a certain extent.

[0075] In some embodiments, such as Figure 9 and Figure 10 As shown, the portable electric shock tester for the subway contact network also includes a handheld terminal 500, which wirelessly communicates with the measuring terminal 130. Optionally, the handheld terminal 500 has a plastic casing containing a circuit board with an integrated wireless communication unit. The circuit board structure mainly consists of a microcontroller and supporting auxiliary electronic components. In practical applications, the circuit board of the handheld terminal 500 can be configured with a control unit, a battery power supply unit, an operation unit, and a display unit according to actual usage requirements for better use. Optionally, the panel of the handheld terminal 500 is equipped with a power display area, a voltage display area, a current display area, an execution status display area, an execution button area, a power switch, and a battery charging port for convenient observation and operation. The handheld terminal 500, as an independent operating unit, can optionally not be mounted on the operating lever 200.

[0076] Alternatively, such as Figure 10 As shown, the handheld terminal 500 is detachably mounted on the operating lever 200, and as... Figure 11 As shown, a magnetically attached fixing sleeve 210 is fitted on the lower part of the operating lever 200 to support the magnetically attached handheld terminal 500. A magnet is embedded in the side of the fixing sleeve 210. Correspondingly, a pad 510 is provided on the back of the handheld terminal 500 for adsorbing onto the side of the fixing sleeve 210 with the magnet, so that the handheld terminal 500 can be placed magnetically when the operation is not in use.

[0077] In this embodiment, a handheld terminal 500 is added, which establishes a wireless communication connection with the measuring terminal 130. The use of the handheld terminal 500 allows maintenance personnel to read the residual contact network voltage data detected by the measuring terminal 130 in real time from a distance, without needing to approach potentially energized discharge testing devices, thus reducing the risk of electric shock to operators to some extent. This wireless layout overcomes the previous limitation of needing to directly view the data displayed on the measuring terminal, allowing operators to complete monitoring work within a relatively safe range.

[0078] In addition, the handheld terminal 500 transmits and interacts with the measurement terminal 130 via wireless communication, reducing cumbersome on-site wiring between the two ends. Wireless connectivity not only simplifies on-site preparation but also reduces the overall connection complexity and saves time to some extent. Furthermore, the absence of traditional physical wires avoids data transmission instability or equipment damage caused by cable wear or on-site misoperation.

[0079] Meanwhile, the wireless communication between the handheld terminal 500 and the measuring terminal 130 enables real-time and reliable reception and display of residual voltage information returned by the measuring terminal 130 during maintenance work. This allows staff to more accurately determine the line status and promptly perform voltage testing and discharge operations. This communication method effectively improves the accuracy of on-site judgment, reduces the probability of human error, and further enhances the safety and reliability of the work process.

[0080] The following is a detailed method for using the portable electric discharge tester for subway overhead contact lines provided in this embodiment:

[0081] First, the on-site personnel connected and assembled the conductive mounting rod 110 with the operating rod 200. Depending on the on-site operational requirements, the operating rod 200 can be extended to an appropriate length for secure attachment to the contact network line requiring discharge testing.

[0082] Next, the operator inserts the grounding plug 310 of the grounding mechanism 300 into the connection mechanism of the discharge tester, specifically into the grounding plug 430 in the connection mechanism 400, to achieve a quick connection of the grounding line. Subsequently, the grounding clamp 330 at the other end of the grounding wire 320 is fixedly clamped to the rail or the negative terminal of the subway system, making the grounding connection more secure and forming a complete grounding loop to a certain extent.

[0083] Then, the staff member holds the lower part of the operating lever 200, such as... Figure 12 As shown, the conductive mounting rod 110 is smoothly attached to the de-energized subway contact network. After the attachment is completed, the measuring terminal 130 will detect the residual pressure of the contact network through the conductive mounting rod 110 and transmit the measurement data to the handheld terminal 500 in a timely manner via wireless communication.

[0084] At this point, the staff, from a relatively safe distance, uses a handheld terminal 500 to view the received residual voltage data and determine whether there is still a high residual voltage in the contact network. If the measuring terminal 130 shows that there is still a high residual voltage in the contact network, the operator can continue to discharge using the grounding mechanism 300, allowing the residual voltage of the contact network to flow sequentially through the conductive connecting rod 110, the connecting mechanism 400, and the grounding wire 320 into the rail or the negative terminal, completing a safe and effective discharge process.

[0085] After the discharge is complete and the handheld terminal 500 displays that the residual voltage of the contact network line has dropped to a safe range, the operator can remove the discharge tester after connecting the grounding device: first, disconnect the conductive connecting rod 110 from the contact network, then remove the grounding clamp 330 from the rail or negative terminal. Finally, retract the telescopic operating rod 200 to its shortest position and disassemble each component of the discharge tester in sequence, tidying it up for future maintenance or operation.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A portable electric discharge tester for subway overhead contact lines, characterized in that, This includes a discharge detection linkage mechanism, an operating lever, and a grounding mechanism; One end of the discharge detection linkage mechanism is connected to the front end of the operating rod. A detachable connection mechanism for the grounding mechanism is provided between the discharge detection linkage mechanism and the operating rod. The operating rod is connected to the discharge detection linkage mechanism through the connection mechanism. The discharge detection linkage mechanism includes a conductive hook rod, an insulating rod, and a measuring terminal. The conductive hook rod is connected to the upper end of the insulating rod and is used to hook onto the subway contact network after power failure. The lower end of the insulating rod is connected to the connecting mechanism and is detachably connected to the operating rod arranged coaxially with the insulating rod. The operating rod is a telescopic operating rod. The measuring terminal is installed in the rear section of the insulating rod and is electrically connected to the conductive hook rod through a connecting wire inside the insulating rod. The measuring terminal can be used to detect the residual voltage of the contact network after power failure and is also electrically connected to the grounding mechanism.

2. The portable electric shock tester for subway overhead contact lines according to claim 1, characterized in that, The connection mechanism includes a conductive connecting post, an insulating sleeve, and a grounding plug. One end of the insulating sleeve is threaded to the operating rod. The conductive connecting post is fixedly installed inside the insulating sleeve. The grounding plug is laterally inserted into the side of the insulating sleeve and connected to the conductive connecting post. The connection mechanism is detachably connected to the grounding plug. A conductive connecting cylinder for connecting to the conductive connecting post is fixedly installed inside the lower end of the insulating rod. The conductive connecting cylinder has a threaded connection hole inside the end connected to the conductive connecting post. The conductive connecting cylinder is threaded to the conductive connecting post. The conductive connecting cylinder is electrically connected to the measuring terminal through a connecting wire inside the insulating rod.

3. The portable electric discharge tester for subway overhead contact lines according to claim 2, characterized in that, The grounding mechanism includes a grounding plug, a grounding wire, and a grounding clamp. One end of the grounding plug is detachably inserted into the grounding socket. One end of the grounding wire is connected to the grounding plug, and the other end of the grounding wire is connected to the grounding clamp.

4. The portable electric shock tester for subway overhead contact lines according to claim 1, characterized in that, The operating rod is made of GFRP (fiberglass reinforced plastic) tubing, and its maximum extended length is 4 meters, while its minimum retracted length is 1.2 meters.

5. The portable electric discharge tester for subway overhead contact lines according to claim 1, characterized in that, The measuring terminal uses a plastic square box shell, and a circuit board is installed inside the measuring terminal. The circuit board integrates a wireless communication unit.

6. The portable electric discharge tester for subway overhead contact lines according to claim 1, characterized in that, The insulating rod is a hollow tube structure made of fiberglass, and the conductive hanging rod is an integral structure made of aluminum.

7. The portable electric discharge tester for subway overhead contact lines according to claim 3, characterized in that, The grounding clamp is a plastic-coated alligator clamp made of copper, used to clamp the rail; the grounding wire is a plastic-coated copper wire with a specification of 2.5mm²; the end of the grounding plug that connects to the grounding plug is a tin-plated copper conductive plug.

8. The portable electric discharge tester for subway overhead contact lines according to claim 1, characterized in that, The insulating rod includes insulating rod I and insulating rod II, which are connected by a conductive connecting rod. Insulating rod I is connected to insulating rod II, and insulating rod II is used to connect to the operating rod. The conductive connecting rod is a columnar structure that is larger in the middle and smaller at both ends. The two ends of the conductive connecting rod are connected to insulating rod I and insulating rod II respectively. A protective cylinder made of insulating material is also provided at the connection between insulating rod I and insulating rod II to prevent the conductive part of the conductive connecting rod from being exposed. The measuring terminal is electrically connected to the conductive connecting rod through a connecting wire, and then electrically connected to the conductive hanging rod through the conductive connecting rod and the connecting wire. The measuring terminal is installed on the insulating rod II.

9. The portable electric shock tester for subway overhead contact lines according to claim 8, characterized in that, An installation sleeve for mounting the measuring terminal is threaded through the insulating rod II. The side of the installation sleeve is provided with a flat end, and the measuring terminal is fixedly mounted on the flat end of the side of the installation sleeve by screws.

10. The portable electric discharge tester for subway overhead contact lines according to claim 1 or 5, characterized in that, It also includes a handheld terminal, which is wirelessly connected to the measurement terminal.

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