Portable checking and discharging electric rod for metro overhead line system

Abstract

The invention 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] The present application belongs to the technical field of urban rail transit power supply contact network, and in particular, relates to a portable discharge test rod for subway contact network. Background Art

[0002] In recent years, the construction of urban rail transit subways in major cities across the country has begun to take shape. Its role in alleviating urban traffic congestion and facilitating travel has been crucial, and it has played a significant role in promoting urban economic development.

[0003] At present, in the operation mode of urban rail transit subways, trains tend to depart early and arrive late, which leaves less and less time for effective maintenance of lines and equipment after parking and isolation of the contact network section. At present, when the subway power supply contact network is undergoing maintenance after power outage and isolation, some lines often have high residual voltage, even up to 1000V or more. This high residual voltage may be caused by bad weather or the aging of the power supply system itself. This phenomenon is often more common, especially for subway projects with earlier construction time, and has become a "pain point" for maintenance operations.

[0004] When faced with the above-mentioned situation where the overhead line has a high residual voltage during the power outage maintenance and maintenance work must be carried out, the current treatment method is to either leave it still and wait for the residual voltage to decrease by hanging multiple traditional testers, or directly hang the grounding device to force the voltage to decrease to the ground, which is prone to unsafe phenomena. The above treatment methods before maintenance work under this special working condition will undoubtedly prolong the overall maintenance work time for the maintenance work that races against time, which is not conducive to improving the maintenance work efficiency. At the same time, the safety of personnel and equipment cannot be guaranteed during the operation, and there are major safety hazards. Summary of the invention

[0005] The present application provides a portable discharge test rod for subway contact network, which is used to solve the problems of low working efficiency of the prior art in which a static treatment method is used to wait for the residual pressure to decrease when there is a high residual pressure in the subway contact network during power outage maintenance work, and the major safety hazards of directly hanging a grounding device to forcibly reduce the voltage.

[0006] The present application provides a portable discharge test rod for a subway overhead contact network, comprising a discharge test rod mechanism, an operating rod and a grounding mechanism; One end of the discharge-testing connecting rod mechanism is connected to the front end of the operating rod, a connecting mechanism detachably connected to the grounding mechanism is provided between the discharge-testing connecting rod mechanism and the operating rod, and the operating rod is connected to the discharge-testing connecting rod mechanism through the connecting mechanism; The discharge test rod mechanism includes a conductive hanging rod, an insulating rod and a measuring terminal; the conductive hanging rod is connected to the upper end of the insulating rod and is used to be hung with 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 coaxially arranged with the insulating rod through the connecting mechanism, the operating rod is a telescopic operating rod, and the measuring terminal is installed in the rear section area of ​​the insulating rod, the measuring terminal is electrically connected to the conductive hanging rod through the connecting wire in the insulating rod, the measuring terminal can be used to detect the residual pressure of the contact network after power failure, and the measuring terminal is also electrically connected to the grounding mechanism.

[0007] In an optional embodiment, the connecting mechanism includes a conductive connecting column, an insulating sleeve and a grounding plug, one end of the insulating sleeve is threadedly connected to the operating rod, the conductive connecting column is fixedly arranged in the insulating sleeve, the grounding plug is laterally inserted into the side of the insulating sleeve and is plugged together with the conductive connecting column, the connecting mechanism and the grounding plug are detachably connected, a conductive connecting cylinder for connecting to the conductive connecting column is fixedly arranged inside the lower end of the insulating rod, a threaded connecting hole is provided inside the conductive connecting cylinder at one end connected to the conductive connecting column, the conductive connecting cylinder is threadedly connected to the conductive connecting column, and the conductive connecting cylinder is electrically connected to the measuring terminal through a connecting wire in the insulating rod.

[0008] 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 plugged into the grounding plug, 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.

[0009] In an optional embodiment, the operating rod is made of glass fiber reinforced plastic tube (GFRP) material, and the maximum stretching length of the operating rod is 4 meters, and the minimum contraction length is 1.2 meters.

[0010] In an optional embodiment, the measuring terminal includes a shell, a built-in circuit board I, a power indicator light, an alarm indicator light, a battery charging port, a power switch and a battery power supply unit I; the shell adopted by the measuring terminal is a square plastic shell box, the built-in circuit board I and the battery power supply unit I are both installed in the shell, the power switch, the alarm indicator light and the battery charging port are arranged at the bottom outside the shell, a power display area is arranged on the upper panel of the shell, the power indicator light is arranged at the power display area, the built-in circuit board I is electrically connected with the alarm indicator light, the power switch, the battery charging port and the power indicator light, a single-chip computer I, a wireless communication unit, an electrical test unit and a discharge unit are arranged on the built-in circuit board I, the wireless communication unit, the electrical test unit and the discharge unit are respectively connected to the single-chip computer I, the electrical test unit is used to detect the residual voltage value of the contact network and transmit the detected residual voltage data to the single-chip computer I, the discharge unit can perform discharge under the control of the single-chip computer I, and the measuring terminal sends electrical test information to an external device through the wireless communication unit.

[0011] In an optional implementation, the insulating rod is a hollow tube structure, the insulating rod is made of fiberglass, and the conductive hanging rod is an integrated structure made of aluminum.

[0012] In an optional embodiment, the ground wire clamp is a plastic-coated alligator wire clamp made of copper, which is used to clamp the rail; the ground wire is a plastic-coated copper wire with a copper wire specification of 2.5mm²; the ground wire plug is a copper tinned conductive plug at the end connected to the ground plug.

[0013] In an optional embodiment, the insulating rod includes an insulating rod I and an insulating rod II, and the insulating rod I and the insulating rod II are connected by a conductive connecting rod, the insulating rod I is connected to the insulating rod I, and the insulating rod II is used to connect to the operating rod, the conductive connecting rod is a columnar structure with a large middle and small ends, and the two ends of the conductive connecting rod are respectively connected to the insulating rod I and the insulating rod II, and a protective tube for preventing the conductive part of the conductive connecting rod from leaking out is also provided at the connection between the insulating rod I and the insulating rod II, and the protective tube is made of insulating material, 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, and the measuring terminal is installed on the insulating rod II.

[0014] In an optional embodiment, a mounting sleeve for mounting the measuring terminal is passed through the insulating rod II, a plane end is provided on the side of the mounting sleeve, and the measuring terminal is fixedly mounted on the plane end on the side of the mounting sleeve by screws.

[0015] In an optional implementation, a handheld terminal is further included, and the handheld terminal is connected to the measurement terminal in a wireless communication manner; The handheld terminal includes a terminal box body, a built-in circuit board II, a display screen, an execution button, a battery charging interface and a battery power supply unit II; the terminal box body used by the handheld terminal is a plastic shell box body, the built-in circuit board II and the battery power supply unit II are both installed in the terminal box body, the upper panel of the terminal box body is provided with the display screen and the execution button, the display screen is used to display the power test information of the measuring terminal, the bottom end of the terminal box body is provided with the battery charging interface, the built-in circuit board II is electrically connected to the display screen, the execution button and the battery charging interface, the built-in circuit board II is provided with a single-chip microcomputer II and a wireless communication unit II, the wireless communication unit II is connected to the single-chip microcomputer II, the handheld terminal receives the power test information sent by the measuring terminal through the wireless communication unit II and displays the information through the display screen, the execution button includes a power button and a discharge execution button, when the discharge execution button of the execution button is pressed and turned on, the single-chip microcomputer II sends a discharge instruction to the measuring terminal through the wireless communication unit II.

[0016] Compared with the prior art, this application has the following beneficial effects: 1. The present application provides a portable discharge test rod for subway overhead contact network provided in this embodiment. By setting a connecting mechanism between the discharge test rod mechanism and the operating rod, a detachable connection of the grounding mechanism can be realized, which is convenient for rapid assembly and disassembly at different work sites. The connecting mechanism organically combines the discharge test rod mechanism, the operating rod and the grounding mechanism into one, and forms a complete discharge test circuit. Compared with the traditional fixed or complex on-site connection method, this structure can quickly build a discharge circuit, effectively reduce the preparation and disassembly time before the operation, and improve the overall operation efficiency.

[0017] 2. The operating rod used in this application is a telescopic operating rod, so that when in use, the operating rod can be extended so that it can reach a farther contact network line hanging position in the extended state, and it is easy to carry and transport after being retracted. In this way, maintenance personnel do not need to carry bulky or too long fixed rods when performing hanging operations, and can flexibly adjust the length according to the working space, making it easier to approach contact networks at different heights, shortening the time for on-site operation preparation, and facilitating the carrying and storage of tools.

[0018] 3. In this application, the insulating rod is connected to the conductive hanging rod to form an insulating isolation structure. The measuring terminal is installed in the rear end area of ​​the insulating rod and connected to the conductive hanging rod through a wire, which can detect the residual pressure state of the contact network after power failure in real time. The entire process of electrical testing 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 for on-site workers, but also ensures the safety of equipment, and objectively improves the safety factor of the overall maintenance work and the reliability of on-site operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the structure of a portable discharge test rod for a subway overhead contact network provided in one embodiment of the present application; Figure 2 A schematic diagram of the structure of a discharge test connecting rod mechanism provided in one embodiment of the present application; Figure 3 A schematic diagram of the structure of a connection mechanism provided in one embodiment of the present application; Figure 4 An exploded schematic diagram of a connection mechanism provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of a grounding mechanism provided in one embodiment of the present application; Figure 6 A schematic diagram of the structure of a conductive connecting rod provided in one embodiment of the present application; Figure 7 A schematic diagram of the structure of a mounting sleeve provided in one embodiment of the present application; Figure 8 A schematic diagram of the structure of a conductive connecting tube provided in one embodiment of the present application; Fig. 9 A schematic diagram of the structure of a portable discharge test rod for a subway overhead contact network provided in another embodiment of the present application; Fig.10 A schematic diagram of the structure of a portable discharge test rod for a subway overhead contact network provided in yet another embodiment of the present application; Fig.11 A schematic diagram of a handheld terminal on an operating rod provided in an embodiment of the present application; Fig.12 A schematic diagram of a portable discharge test rod for a subway overhead contact network provided in an embodiment of the present application when being used to hang on the overhead contact network; Fig.13 An overall schematic diagram of a measurement terminal provided in an embodiment of the present application; Fig.14 An overall schematic diagram of a handheld terminal provided in one embodiment of the present application; Fig.15 A schematic diagram of the composition of a built-in circuit board I provided in one embodiment of the present application; Fig.16 A schematic diagram of the composition of a built-in circuit board II provided in one embodiment of the present application.

[0021] Description of reference numerals: 100-testing and discharging connecting rod mechanism; 110-conductive hanging rod; 120-insulating rod; 1201-conductive connecting tube; 121-insulating rod Ⅰ; 122-insulating rod Ⅱ; 123-conductive connecting rod; 124-protective tube; 130-measuring terminal; 131-installation sheath; 1301-housing; 1302-built-in circuit board Ⅰ; 13021-single chip microcomputer Ⅰ; 13022-wireless communication unit Ⅰ; 13023-testing unit; 13024-discharging unit; 1303-power indicator light; 1304-power switch; 1305-alarm Indicator light; 1306-battery charging port; 200-operating lever; 210-fixing sleeve; 300-grounding mechanism; 310-grounding plug; 320-grounding wire; 330-grounding clamp; 400-connecting mechanism; 410-conductive connecting column; 420-insulating sheath; 430-grounding plug; 500-handheld terminal; 510-washer; 501-terminal box; 502-built-in circuit board II; 5021-single-chip microcomputer II; 5022-wireless communication unit II; 503-battery charging interface; 504-display screen; 505-execution button. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0023] See also Figure 1-Figure 16 The embodiment of the present application provides a portable discharge test rod for a subway overhead contact network, including a discharge test rod mechanism 100, an operating rod 200 and a grounding mechanism 300.

[0024] One end of the test discharge link mechanism 100 is connected to the front end of the operating rod 200, and a connecting mechanism 400 for detachably connecting the grounding mechanism 300 is provided between the test discharge link mechanism 100 and the operating rod 200, and the operating rod 200 is connected to the test discharge link mechanism 100 through the connecting mechanism 400; The discharge test rod mechanism 100 includes a conductive hanging rod 110, an insulating rod 120 and a measuring terminal 130; the conductive hanging rod 110 is connected to the upper end of the insulating rod 120, and is used to be hung with the subway contact network after power failure; the lower end of the insulating rod 120 is connected to a connecting mechanism 400 and is detachably connected to an operating rod 200 coaxially arranged with the insulating rod 120 through the connecting mechanism 400, and the operating rod 200 is a telescopic operating rod, and the measuring terminal 130 is installed in the rear section area of ​​the insulating rod 120, and the measuring terminal 130 is electrically connected to the conductive hanging rod 110 through the connecting wire in the insulating rod 120, and the measuring terminal 130 can be used to detect the residual pressure of the contact network after power failure, and the measuring terminal 130 is also electrically connected to the grounding mechanism 300.

[0025] The portable test and discharge rod for subway overhead contact network provided in this embodiment can realize the detachable connection of the grounding mechanism 300 by setting the connection mechanism 400 between the test and discharge connecting rod mechanism 100 and the operating rod 200, so as to facilitate the rapid assembly and disassembly at different work sites. The connection mechanism 400 organically combines the test and discharge connecting rod mechanism 100, the operating rod 200 and the grounding mechanism 300 into one, and forms a complete test and discharge circuit. Compared with the traditional fixed or complex on-site connection method, this structure can quickly build a discharge circuit, effectively reduce the preparation and disassembly time before the operation, and improve the overall operation efficiency.

[0026] At the same time, the operating rod 200 used in this embodiment is a telescopic operating rod, so that when in use, the operating rod 200 can be extended so that the operating rod 200 can reach a farther contact network line hanging position in the extended state, and it is easy to carry and transport after being retracted. In this way, maintenance personnel do not need to carry bulky or too long fixed rods when performing hanging operations, and can flexibly adjust the length according to the working space, making it easier to approach contact networks at different heights, shortening the time for on-site operation preparation, and facilitating the carrying and storage of tools.

[0027] In addition, in this embodiment, the insulating rod 120 is connected to the conductive hanging rod 110 to form an insulating isolation structure, and the measuring terminal 130 is installed in the rear end area of ​​the insulating rod 120 and connected to the conductive hanging rod 110 through a wire, so that the residual pressure state of the contact network after power failure can be detected in real time. The entire process of electrical testing 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 for on-site workers, but also ensures the safety of equipment, and objectively improves the safety factor of the overall maintenance work and the reliability of on-site operations.

[0028] In some embodiments, Figure 2-Figure 4 As shown, the connection mechanism 400 includes a conductive connection column 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 connection column 410 is fixedly arranged in the insulating sleeve 420. The grounding plug 430 is laterally plugged into the side of the insulating sleeve 420 and plugged into the conductive connection column 410. The connection mechanism 400 and the grounding plug 430 are detachably connected. A conductive connection cylinder 1201 for connecting to the conductive connection column 410 is fixedly arranged inside the lower end of the insulating rod 120. Figure 8 A schematic structural diagram of a usable conductive connecting tube 1201 is shown. A threaded connection hole is provided inside the end of the conductive connecting tube 1201 connected to the conductive connecting column 410. The conductive connecting tube 1201 is threadedly connected to the conductive connecting column 410. The conductive connecting tube 1201 is electrically connected to the measuring terminal 130 via a connecting wire in the insulating rod 120.

[0029] In the above embodiment, the connection mechanism 400 of the present application adopts a threaded connection between the insulating sheath 420 and the operating rod 200, and a conductive connection column 410 is provided inside the insulating sheath 420. This structural form not only makes the connection part more firm and reliable, but also effectively reduces the possibility of loosening of the connection. When the operator assembles the discharge test rod on site, the connection of the operating rod 200 can be completed by a simple rotation action, and the operation difficulty is significantly reduced. Therefore, the on-site staff can quickly assemble and disassemble the equipment, shorten the preparation time, and simplify the subsequent maintenance and parts replacement process.

[0030] In addition, the conductive connection column 410 is embedded in the insulating sheath 420, and the grounding plug 430 arranged on the side is horizontally plugged and connected to the conductive connection column 410. This horizontal layout, on the one hand, realizes effective insulation protection of the conductive connection column 410, and reduces the risk of accidental electric shock caused by leakage of electrical parts; on the other hand, it also makes the plug-in connection between the grounding plug 430 and the connection column more reliable, forming a stable electrical connection circuit, improving the safety of the discharge test process, and reducing the risk of operators accidentally touching the conductive parts.

[0031] In addition, a conductive connection tube 1201 is installed inside the insulating rod 120, and the conductive connection tube 1201 is connected to the conductive connection column 410 by a threaded connection, and is further connected to the measurement terminal 130 by an internal connecting wire. This design makes the electrical connection stable and reliable, and the on-site operation and assembly are more convenient and quick. This stable electrical connection method enables the measurement terminal 130 to more accurately collect the residual pressure data of the contact network. On-site personnel do not need to directly contact the live parts at close range, which improves the detection accuracy, reduces the risk of electric shock to personnel, and improves the efficiency and reliability of on-site operations.

[0032] In some embodiments, 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 plugged 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.

[0033] In this embodiment, three components, namely, a grounding plug 310, a grounding wire 320, and a grounding clamp 330, are provided in the grounding mechanism 300. The grounding plug 310 is a plug-in structure, and can be connected to the grounding plug 430 in a plug-in manner. This design allows the grounding wire to be quickly assembled or disassembled, reduces the inconvenience of connecting the traditional fixed grounding structure when used on site, and is also convenient for carrying and replacement.

[0034] At the same time, the grounding wire 320 of this embodiment adopts plasticized copper wire with a specification of 2.5mm², which can provide good conductivity and good insulation characteristics. The grounding wire 320 is moderately long and flexible, which is convenient for maintenance personnel to flexibly lay the grounding line, reduces the difficulty of on-site operation caused by insufficient or excessive length of rigid wire in the past, and reduces the use risk caused by the fragility of the wire, thereby improving the convenience of on-site maintenance operations.

[0035] From the connection relationship point of view, the ground wire clamp 330 adopts a plastic-coated alligator wire clamp made of copper material, which has a strong clamping force and reliable conductive performance. It can quickly and firmly connect the subway rail or the negative pole to provide effective conduction for the discharge circuit. In this embodiment, through the plug-in connection between the ground wire plug 310 and the ground plug 430, the overall electrical connection relationship can be installed or disassembled in a relatively short time, thereby reducing the probability of wiring misoperation. Doing so can greatly reduce the risks caused by loose connections or poor contact, and further improve the safety of the on-site discharge test process.

[0036] In some embodiments, the operating rod 200 is made of glass fiber reinforced plastic tube (GFRP) material, and the maximum stretching length of the operating rod 200 is 4 meters, and the minimum contraction length is 1.2 meters.

[0037] The operating rod 200 of this embodiment is made of GFRP material. GFRP material has the characteristics of high insulation strength and lightness, which can reduce the risk of electric shock caused by the conduction of the rod during operation, and also reduce the physical burden during maintenance. From the perspective of structural design, the operating rod 200 is designed as a telescopic structure with a maximum stretching length of 4 meters and a minimum contraction length of 1.2 meters, which can meet the length requirements of different maintenance scenarios. When performing maintenance at high altitudes, the operating rod can be stretched to achieve long-distance operation, and after the operation is completed, it can be quickly retracted for carrying and storage. Compared with fixed-length rods, this telescopic structure helps to improve the flexibility of maintenance operations, save work preparation time, and improve on-site work efficiency to a certain extent.

[0038] In addition, the operating rod 200 is connected to the discharge test rod mechanism 100 through the connecting mechanism 400, which can form a relatively stable overall structure. The good insulation performance of the fiberglass material combined with the stability of the connecting mechanism 400 can reduce the safety hazards caused by conduction or loose connection during on-site assembly. At the same time, the design of a length of 1.2 meters in the retracted state makes the whole more compact, which is convenient for operators to quickly complete assembly and disassembly, and also improves the convenience of on-site operations to a certain extent.

[0039] In some embodiments, Fig.13 As shown, the measuring terminal 130 includes a shell 1301, a built-in circuit board Ⅰ1302, a power indicator light 1303, an alarm indicator light 1305, a battery charging port 1306, a power switch 1304 and a battery power supply unit Ⅰ; the shell 1301 used by the measuring terminal 130 is a square plastic shell box, which is the core area of ​​the voltage measurement. The measuring terminal 130 is provided with a mounting hole on the back of the shell 1301 for installation. The built-in circuit board Ⅰ1302 and the battery power supply unit Ⅰ are both installed in the shell 1301, and the power switch 1304, the alarm indicator light 1305 and the battery charging port 1306 are provided at the bottom outside the shell 1301. A power display area is provided on the upper panel of the shell 1301, and the power indicator light 1303 is provided at the power display area. The built-in circuit board Ⅰ1302 is electrically connected with the alarm indicator light 1305, the power switch 1304, the battery charging port 1306 and the power indicator light 1303, as shown in FIG. Fig.15As shown, a single-chip microcomputer Ⅰ13021, a wireless communication unit Ⅰ13022, an electrical testing unit 13023 and a discharge unit 13024 are arranged on the built-in circuit board Ⅰ1302. The wireless communication unit Ⅰ13022, the electrical testing unit 13023 and the discharge unit 13024 are respectively connected to the single-chip microcomputer Ⅰ13021. The electrical testing unit 13023 is used to detect the residual voltage value of the contact network and transmit the detected residual voltage data to the single-chip microcomputer Ⅰ13021. The discharge unit 13024 can perform discharge under the control of the single-chip microcomputer Ⅰ13021. The measuring terminal 130 sends the electrical testing information to the external device through the wireless communication unit Ⅰ13022.

[0040] In the above embodiment, the measuring terminal 130 uses a plastic square box as the outer shell. The plastic shell has good insulation properties and can reduce the possibility of voltage or current leakage to a certain extent. At the same time, the outer structure of the square box helps to stably install and fix the circuit board and other electronic components, reducing the probability of the circuit board being damaged by external force impact, thereby improving the durability and reliability of the measuring terminal 130 during use. At the same time, the battery power supply unit I provides power support for the continuous and stable power supply of the measuring terminal 130. The bottom of the outer shell 1301 is provided with a power switch 1304 and an alarm indicator light 1305, which is convenient for the staff to intuitively operate and observe, and is more convenient to use. The power indicator light 1303 is arranged in the power display area of ​​the upper panel of the outer shell 1301, and is electrically connected to the built-in circuit board I 1302, which can intuitively display the real-time power status of the battery power supply unit I inside the measuring terminal 130, thereby helping the staff to grasp the power supply status of the equipment in a timely manner. In addition, the alarm indicator light 1305 is arranged at the bottom area outside the shell 1301, which is used to provide real-time alarm prompts for the detected residual pressure status of the contact network, further reducing the possibility of accidents caused by operators ignoring or misjudging the residual pressure status.

[0041] In this embodiment, a circuit board is configured inside the measuring terminal 130, and the single-chip microcomputer Ⅰ13021, the wireless communication unit Ⅰ13022, the electric test unit 13023 and the discharge unit 13024 are integrated on the circuit board, making the overall structure more compact, so that the volume and weight of the measuring terminal 130 are relatively small, which is convenient for on-site maintenance personnel to hold or perform related operations, reducing the burden of use, and also improving portability and operation efficiency to a certain extent. At the same time, in this embodiment, electronic modules such as the single-chip microcomputer Ⅰ13021, the electric test unit 13023 and the discharge unit 13024 are integrated on the built-in circuit board Ⅰ1302. Among them, the electric test unit 13023 can accurately detect the residual pressure data of the contact network in real time and transmit it to the single-chip microcomputer Ⅰ13021 for data processing, and the discharge unit 13024 realizes the discharge action according to the instructions of the single-chip microcomputer Ⅰ13021. This integrated structure enables the measuring terminal 130 to better realize the integrated operation of electric test and discharge, and the operation process is smoother, which helps to improve the safety, reliability and operation efficiency of on-site operations.

[0042] In addition, the built-in wireless communication unit of the measuring terminal 130 can communicate wirelessly with the handheld terminal 500, avoiding the cumbersome wiring between the discharge test rod and the handheld terminal. This not only reduces the risk of misoperation caused by wiring, but also improves the safety of operators to a certain extent. At the same time, the wireless connection method eliminates the process of on-site wiring, shortens the preparation time, and makes the operation simpler and more efficient.

[0043] In practical applications, in order to improve the discharge effect, the measuring terminal 130 can selectively adopt a two-stage discharge mode, that is, the entire discharge process is divided into two stages (stage I and stage II) according to the residual voltage of the contact network line. The stage I discharge and the stage II discharge each have independent control circuits, which can be operated separately and have an interlocking relationship with each other. Only when specific conditions are met will they switch from one stage to another. Stage I discharge is aimed at the situation where the residual voltage is high (for example, a residual voltage of several hundred volts or even more than 1000 volts), while stage II discharge is aimed at the fine discharge after the residual voltage is reduced to a lower range. Specifically, when the measuring terminal detects that the residual voltage is high, the system preferentially starts the stage I discharge, and quickly discharges the high residual voltage to a lower level through a large current loop or a corresponding discharge resistor. Secondly, when the stage I discharge ends, the measuring terminal monitors the residual voltage level in real time. If the residual voltage drops to a predetermined lower voltage range, the stage II discharge is started again. The stage II discharge generally discharges the residual voltage to a safer level through a more sophisticated discharge circuit or resistor network for low voltage. This segmented design can avoid the risk of equipment damage or on-site accidents that may be caused by continuous high-current discharge.

[0044] Optionally, in some embodiments, the discharge unit 13024 includes a section I discharge module and a section II discharge module; the section I discharge module and the section II discharge module are independently configured, and a mutually interlocked control logic is provided between the two: when the measuring terminal 130 detects that the residual voltage of the contact network is higher than a preset threshold, the section I discharge module is started to perform high-voltage rapid discharge; when the measuring terminal 130 detects that the residual voltage of the contact network drops below a preset threshold, the section II discharge module is started to perform low-voltage fine discharge.

[0045] The design of the segmented discharge function using the above-mentioned discharge unit 13024 can avoid the risk of equipment damage or on-site accidents that may be caused by continuous use of large current discharge. The operation logic between the stage I discharge module and the stage II discharge module is interlocked, that is, the stage II discharge can only be started when the residual voltage drops below the safety threshold set by the stage I discharge, and when in a high residual voltage state, the system will automatically lock the stage II discharge to avoid damage or safety problems caused by misoperation. Therefore, the design of this "mutual locking" mechanism can better prevent misoperation or conflict between stage I and stage II discharge, and further reduce safety hazards during on-site operation. The realization of this two-stage discharge enables both the rapid discharge of high residual voltage and the precise discharge of residual low voltage in the test discharge operation, thereby helping to improve the safety and efficiency of the entire test discharge process.

[0046] In order to use the test discharge more safely, in specific applications, the discharge operation should be performed when the line is normally powered off, and the discharge operation should not be performed when the line is abnormal (i.e., normal voltage (power is not off) or there is a large leakage in the line (the leakage current is greater than the safety value)).

[0047] Optionally, in some embodiments, the single chip computer Ⅰ13021 is preset with a voltage threshold and a current threshold; when the contact network voltage detected by the electrical testing unit 13023 is higher than the voltage threshold, the single chip computer Ⅰ13021 controls the discharge channel of the discharge unit 13024 to be locked; when the discharge current of the discharge unit 13024 exceeds the preset safety current threshold, the single chip computer Ⅰ13021 also controls the discharge unit 13024 to stop the discharge action.

[0048] Further, optionally, the electric test unit 13023 is configured with a voltage monitoring module and a current monitoring module. The voltage detection module is used to monitor the voltage of the overhead contact line in real time. The single chip microcomputer Ⅰ13021 is further configured as follows: when it is detected that the overhead contact line voltage is higher than the voltage threshold, the single chip microcomputer Ⅰ13021 controls the discharge channel of the discharge unit 13024 to be closed; the current monitoring module is used to monitor the discharge current in real time. When the discharge current exceeds 20mA, the single chip microcomputer Ⅰ13021 also controls the discharge channel of the discharge unit 13024 to be closed. In addition, in order to facilitate the judgment of normal voltage (power is not cut off) to avoid misoperation discharge, the single chip microcomputer Ⅰ13021 also needs to be configured as follows: if the voltage does not change within 3s after discharge, the single chip microcomputer Ⅰ13021 controls the discharge channel of the discharge unit 13024 to be closed.

[0049] 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 integrated structure made of aluminum.

[0050] The insulating rod 120 of this embodiment adopts a hollow tube structure design, which significantly reduces the overall weight of the rod body and reduces the physical burden of on-site workers when carrying and operating. At the same time, this hollow structure can also better arrange the internal connecting wires, so that the wires are not directly exposed to the external environment, reduce the possibility of the wires being worn or damaged, and improve the safety and durability of the overall structure.

[0051] In addition, the insulating rod 120 is made of fiberglass, which has good insulation and corrosion resistance. This material is not only not easy to conduct electricity, but also has relatively stable and long-lasting insulation performance, which can effectively reduce the possibility of high-voltage current being conducted through the rod, thereby significantly reducing the risk of electric shock to operators. In the actual operation process, the safety of operators holding the discharge test rod is also improved.

[0052] In addition, the conductive hook rod 110 is made of aluminum material into an integrated structure. Aluminum has excellent conductivity and high mechanical strength, which is convenient for quickly and stably forming effective contact with the contact network line, and better introducing the residual voltage of the contact network into the measurement terminal 130. In addition, the integrated aluminum structure also has high mechanical strength and rigidity, which can reduce deformation or damage during hooking, help improve the stability of voltage signal transmission and the accuracy of electrical test data, and further reduce the frequency of daily maintenance and equipment damage.

[0053] In some embodiments, the ground wire clamp 330 is a plastic-coated alligator wire clamp made of copper, which is used to clamp the rail; the ground wire 320 is a plastic-coated copper wire with a copper wire specification of 2.5 mm²; the ground wire plug 310 is a copper tinned conductive plug at the end connected to the ground plug 430.

[0054] The grounding clamp 330 of this embodiment is a plastic-coated alligator wire clamp made of copper, which can provide a relatively stable electrical connection when clamping the rail. The copper material itself has good electrical conductivity and can quickly guide the residual current in the line to the rail. The alligator clip structure has strong firmness when clamping the rail and is not easy to fall off. It can also reduce the risk of interruption of the discharge circuit or electrical accidents caused by loose connection to a certain extent, thereby enhancing the safety and reliability of the overall discharge operation.

[0055] The grounding wire 320 uses plasticized copper wire with a specification of 2.5mm², which can effectively conduct a large current during the discharge process, while avoiding the situation where the wire is too thin and causes heating or burning. Its outer plastic coating structure provides higher insulation and protection properties for the wire, reducing the risk of damage to the wire when it is affected by friction or other adverse environmental factors, thereby further improving the safety and service life of the grounding wire.

[0056] The grounding plug 310 adopts a copper tinned conductive plug structure, which can form a relatively stable electrical connection after being inserted into the grounding plug 430. The copper tinned surface is smooth and corrosion-resistant, and is not easy to oxidize or rust during long-term use, thereby maintaining good conductivity of the plug-in connection part to a certain extent. This quick plug-in design simplifies the connection steps of on-site operations, improves operating efficiency, and reduces the probability of misoperation and the possibility of failure in the grounding connection link.

[0057] In some embodiments, Figure 2 As shown, the insulating rod 120 includes an insulating rod I 121 and an insulating rod II 122, the insulating rod I 121 and the insulating rod II 122 are connected by a conductive connecting rod 123, the insulating rod I 121 is connected to the insulating rod I 121, and the insulating rod II 122 is used to connect with the operating rod 200, as shown in FIG. Figure 6 As shown, the conductive connecting rod 123 is a columnar structure with a large middle and small ends. The two ends of the conductive connecting rod 123 are respectively connected to the insulating rod I 121 and the insulating rod II 122. The connection between the insulating rod I 121 and the insulating rod II 122 is also provided with a protective tube 124 for preventing the conductive part of the conductive connecting rod 123 from leaking out. The protective tube 124 is made of insulating material. The measuring terminal 130 is electrically connected to the conductive connecting rod 123 through a 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.

[0058] The insulating rod 120 in this embodiment adopts a two-stage design, which is divided into an insulating rod I 121 and an insulating rod II 122, and is connected by a conductive connecting rod 123. This segmented structure can reduce the difficulty of manufacturing, transporting and storing the rod body to a certain extent, and facilitates rapid assembly on site. Compared with the traditional single long rod structure, this design makes the discharge test rod more compact after disassembly, more convenient to carry, and more flexible in operation.

[0059] The conductive connecting rod 123 adopts a columnar structure with a large middle and small ends. This design allows the conductive connecting rod to maintain a moderate contact area when connected with the insulating rod I 121 and the insulating rod II 122, reducing the possibility of looseness or shaking at the connection. In addition, the columnar structure not only provides a conductive function but also has a certain mechanical support capability, which helps to maintain the stability of the rod body after connection, thereby improving the safety and reliability of the overall connection part.

[0060] At the connection between the insulating rod I 121 and the insulating rod II 122, a protective tube 124 made of insulating material is additionally provided to reduce the risk of the conductive connecting rod 123 being exposed. This can prevent operators from touching live parts during maintenance to a certain extent, thereby further reducing the operating risk. At the same time, the measuring terminal 130 is installed on the insulating rod II 122 and connected to the conductive connecting rod 123 through a wire, and then connected to the conductive hanging rod 110 through the conductive connecting rod 123 and the connecting wire, so that the measuring terminal 130 can obtain the residual pressure data of the contact network more accurately, thereby improving the reliability and accuracy of the transmission of the electrical test data.

[0061] In some embodiments, Figure 2 and Figure 7 As shown, the insulating rod II 122 is connected with a mounting sheath 131 for mounting a measuring terminal 130. Figure 7 As shown, a plane end is provided on the side of the mounting sleeve 131 , and the measuring terminal 130 is fixedly mounted on the plane end on the side of the mounting sleeve 131 by means of screws.

[0062] In this embodiment, an installation sleeve 131 is added to the insulating rod II 122 for installing the measuring terminal 130. The installation sleeve 131 surrounds and penetrates the outer side 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 force or vibration on the measuring terminal 130, and avoid displacement or loosening of the measuring terminal during operation.

[0063] A plane end is specially reserved on the side of the installation sheath 131 to provide a relatively stable and suitable area fixing base. The measurement terminal 130 is fixed to the plane end by screws, which further enhances the stability of the installation connection. Compared with the traditional binding or buckle method, screw fixing has better performance in strength and precision, and is also more convenient for later maintenance and disassembly.

[0064] In addition, in this embodiment, by installing the sheath 131 and the structure of the flat end, the measuring terminal 130 can be relatively firmly set on the insulating rod II 122, and form a relatively reliable electrical connection with the internal wire. This method can reduce the poor contact or data error caused by the loose installation of the measuring terminal 130, help improve the reliability and accuracy of the detection data, and also strengthen the safety of the discharge test process to a certain extent.

[0065] In some embodiments, Fig. 9 and Fig.10 As shown, the portable discharge test rod for subway overhead line also includes a handheld terminal 500, and the handheld terminal 500 is connected to the measuring terminal 130 in a wireless communication manner.

[0066] like Fig.14 As shown, the handheld terminal 500 includes a terminal box body 501, a built-in circuit board II 502, a display screen 504, an execution button 505, a battery charging interface 503 and a battery power supply unit II; the terminal box body 501 used by the handheld terminal 500 is a plastic shell box body, the built-in circuit board II 502 and the battery power supply unit II are both installed in the terminal box body 501, and a display screen 504 and an execution button 505 are arranged on the upper panel of the terminal box body 501. The display screen 504 is used to display the power test information of the measuring terminal 130. The bottom end of the terminal box body 501 is provided with a battery charging interface 503, and the built-in circuit board II 502 is electrically connected to the display screen 504, the execution button 505, and the battery charging interface 503, as shown in FIG. Fig.16 As shown, a single-chip microcomputer II 5021 and a wireless communication unit II 5022 are arranged on the built-in circuit board II 502, and the wireless communication unit II 5022 is connected to the single-chip microcomputer II 5021. The handheld terminal 500 receives the power test information sent by the measuring terminal 130 through the wireless communication unit II 5022 and displays the information through the display screen 504. The execution button 505 includes a power button and a discharge execution button. When the discharge execution button of the execution button 505 is pressed and turned on, the single-chip microcomputer II 5021 sends a discharge instruction to the measuring terminal 130 through the wireless communication unit II 5022. As an independent operating unit, the handheld terminal 500 can be selectively not installed on the operating rod 200.

[0067] The newly added handheld terminal 500 in this embodiment is interconnected with the measuring terminal 130 through wireless communication. The handheld terminal 500 is composed of a terminal box 501, a built-in circuit board II 502, a battery power supply unit II, a display screen 504, an execution button 505 and a battery charging interface 503, wherein the terminal box 501 provides overall support and protection, and each component is reasonably arranged on the terminal box 501. The display screen 504 is arranged on the upper panel of the terminal box 501, which is convenient for intuitively presenting the electrical inspection information detected by the measuring terminal 130 in real time, helping the on-site staff to grasp the residual pressure status of the subway contact network in time, avoiding the staff from close contact with the electrical inspection equipment that may be energized, and reducing the safety risk of on-site operations.

[0068] The terminal box 501 has a built-in circuit board II 502 and a battery power supply unit II arranged inside. The built-in circuit board II 502 integrates a single-chip microcomputer II 5021 and a wireless communication unit II 5022, and wirelessly exchanges data with the measurement terminal 130 through the wireless communication unit II 5022. This wireless communication method reduces the complexity of on-site wiring and eliminates the cumbersome wire connection steps in traditional equipment, making the equipment more flexible to carry and more convenient to use on-site. The built-in battery power supply unit II provides power for the stable power supply of the handheld terminal 500, further improving the battery life of the handheld terminal 500, and is suitable for long-term maintenance operations.

[0069] At the same time, the upper panel of the terminal box body 501 is designed with a display screen 504 and an execution button 505. The display screen 504 can display the test information fed back by the measuring terminal 130 in real time and intuitively, so as to help the staff to understand the line status in a timely and clear manner, so as to reduce the possibility of human misjudgment, and thus improve the safety and effectiveness of the operation. The execution button 505 is electrically connected to the built-in circuit board II 502. When the on-site staff presses the discharge button, the single-chip microcomputer II 5021 can send a discharge instruction to the measuring terminal 130 through the wireless communication unit II 5022, and control the measuring terminal 130 to perform the discharge action, so that the entire test discharge operation process is smoother and more efficient, thereby reducing the possibility of operational errors.

[0070] Additionally, optionally, Fig.10 As shown, the handheld terminal 500 is detachably mounted on the operating rod 200. Fig.11 As shown, a fixing sleeve 210 with a magnetic attraction for supporting and adsorbing the handheld terminal 500 is mounted on the lower section of the operating rod 200, and a magnet is embedded in the side of the fixing sleeve 210. Accordingly, a washer 510 is provided on the back of the handheld terminal 500 for adsorbing on the side of the fixing sleeve 210 with the magnet, so as to adsorb and place the handheld terminal 500 when the operation is idle.

[0071] The technical solution of this embodiment adds a handheld terminal 500, and establishes a communication connection with the measuring terminal 130 in a wireless manner. The use of the handheld terminal 500 enables maintenance personnel to read the residual pressure data of the contact network detected by the measuring terminal 130 in real time at a long distance without approaching the test and discharge device that may be energized, thereby reducing the risk of electric shock to operators to a certain extent. This wireless layout breaks through the previous limitation of needing to directly view the display data of the measuring terminal, allowing operators to complete monitoring work in a relatively safe range.

[0072] In addition, the handheld terminal 500 transmits and interacts with the measuring terminal 130 through wireless communication, reducing the cumbersome on-site wiring between the two ends. Wireless connection not only simplifies on-site preparation work, but also reduces the complexity of the overall connection and saves the time required for the operation to a certain extent. At the same time, since there is no constraint of traditional physical wires, it can avoid unstable data transmission or equipment damage caused by cable wear or on-site misoperation.

[0073] At the same time, the wireless communication method between the handheld terminal 500 and the measuring terminal 130 can receive and display the residual voltage information returned by the measuring terminal 130 in real time and reliably during the maintenance operation. The staff can judge the line status more accurately and perform the power test and discharge operation in time. This communication method effectively improves the accuracy of on-site operation judgment and reduces the probability of human judgment errors, thereby further enhancing the safety and reliability of the operation process.

[0074] The following is a specific method for using the portable discharge test rod for subway overhead contact network provided in this embodiment: First, the on-site staff connects and assembles the conductive hook rod 110 and the operating rod 200. According to the on-site operation requirements, the operating rod 200 can be stretched to an appropriate length so as to be firmly hooked to the overhead contact line that needs to be tested for discharge.

[0075] Next, the operator inserts the grounding plug 310 of the grounding mechanism 300 into the connection mechanism of the discharge test rod, 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 on the rail or the negative pole of the subway system, making the grounding connection more secure and forming a fully functional grounding loop to a certain extent.

[0076] Then, the staff holds the lower end of the operating rod 200, such as Fig.12 As shown, the conductive hooking rod 110 is smoothly hooked to the subway contact network that has been powered off. After the hooking is completed, the measurement terminal 130 will detect the residual pressure condition of the contact network through the conductive hooking rod 110, and transmit the measurement data to the handheld terminal 500 in a timely manner by wireless communication.

[0077] At this time, the staff browses the received residual pressure data through the handheld terminal 500 at a relatively safe distance to determine whether the overhead contact network still has a high residual pressure. If the measurement terminal 130 shows that the overhead contact network still has a high residual pressure, the operator can continue to use the grounding mechanism 300 to discharge according to the actual situation, so that the residual pressure of the overhead contact network flows into the rail or the negative electrode through the conductive hanging rod 110, the connecting mechanism 400, and the grounding wire 320 in sequence, completing a safe and effective discharge process.

[0078] After the discharge is completed and the handheld terminal 500 shows that the residual voltage of the contact network line has dropped to the safe range, the operator can remove the discharge test rod after the grounding device is hung: first release the connection between the conductive hook rod 110 and the contact network, and then remove the ground wire clamp 330 from the rail or the negative pole. Finally, retract the telescopic operating rod 200 to the shortest state and disassemble the components of the discharge test rod in turn, and keep them for the next maintenance or operation.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A portable discharge test rod for subway contact network, characterized in that: It includes a test discharge connecting rod mechanism, an operating rod and a grounding mechanism; One end of the discharge-testing connecting rod mechanism is connected to the front end of the operating rod, a connecting mechanism detachably connected to the grounding mechanism is provided between the discharge-testing connecting rod mechanism and the operating rod, and the operating rod is connected to the discharge-testing connecting rod mechanism through the connecting mechanism; The discharge test rod mechanism includes a conductive hanging rod, an insulating rod and a measuring terminal; the conductive hanging rod is connected to the upper end of the insulating rod and is used to be hung with 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 coaxially arranged with the insulating rod through the connecting mechanism, the operating rod is a telescopic operating rod, and the measuring terminal is installed in the rear section area of ​​the insulating rod, the measuring terminal is electrically connected to the conductive hanging rod through the connecting wire in the insulating rod, the measuring terminal can be used to detect the residual pressure of the contact network after power failure, and the measuring terminal is also electrically connected to the grounding mechanism.

2. The portable discharge test rod for subway overhead contact network according to claim 1 is characterized in that: The connecting mechanism includes a conductive connecting column, an insulating sleeve and a grounding plug. One end of the insulating sleeve is threadedly connected to the operating rod, the conductive connecting column is fixedly arranged in the insulating sleeve, the grounding plug is laterally inserted into the side of the insulating sleeve and is inserted together with the conductive connecting column, the connecting mechanism and the grounding plug are detachably connected, a conductive connecting cylinder for connecting to the conductive connecting column is fixedly arranged inside the lower end of the insulating rod, a threaded connecting hole is arranged inside the conductive connecting cylinder at one end connected to the conductive connecting column, the conductive connecting cylinder is threadedly connected to the conductive connecting column, and the conductive connecting cylinder is electrically connected to the measuring terminal through a connecting wire in the insulating rod.

3. The portable discharge test rod for subway overhead contact network according to claim 2 is characterized in that: The grounding mechanism comprises a grounding plug, a grounding wire and a grounding clamp, one end of the grounding plug is detachably plugged into the grounding plug tube, 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 discharge test rod for subway overhead contact network according to claim 1 is characterized in that: The operating rod is made of glass fiber reinforced plastic tube GFRP material, and the maximum stretching length of the operating rod is 4 meters, and the minimum contraction length is 1.2 meters.

5. The portable discharge test rod for subway overhead contact network according to claim 1 is characterized in that: The measuring terminal comprises a shell, a built-in circuit board I, a power indicator light, an alarm indicator light, a battery charging port, a power switch and a battery power supply unit I; the shell adopted by the measuring terminal is a square plastic shell box, the built-in circuit board I and the battery power supply unit I are both installed in the shell, the bottom end outside the shell is provided with the power switch, the alarm indicator light and the battery charging port, the upper panel of the shell is provided with a power display area, the power indicator light is provided at the power display area, the built-in circuit board I is electrically connected with the alarm indicator light, the power switch, the battery charging port and the power indicator light, the built-in circuit board I is provided with a single-chip microcomputer I, a wireless communication unit, an electrical testing unit and a discharge unit, the wireless communication unit, the electrical testing unit and the discharge unit are respectively connected with the single-chip microcomputer I, the electrical testing unit is used to detect the residual voltage value of the contact network and transmit the detected residual voltage data to the single-chip microcomputer I, the discharge unit can perform discharge under the control of the single-chip microcomputer I, and the measuring terminal sends electrical testing information to an external device through the wireless communication unit.

6. The portable discharge test rod for subway overhead contact network according to claim 1 is characterized in that: The insulating rod is a hollow tube structure, the material of the insulating rod is glass fiber reinforced plastic, and the conductive hanging rod is an integrated structure made of aluminum material.

7. The portable discharge test rod for subway overhead contact network according to claim 3 is characterized in that: The ground wire clamp is a plastic-coated alligator wire clamp made of copper, which is used to clamp the rail; the ground wire is a plastic-coated copper wire with a copper wire specification of 2.5mm²; the end of the ground wire plug connected to the ground plug is a copper tinned conductive plug.

8. The portable discharge test rod for subway overhead contact network according to claim 1 is characterized in that: The insulating rod includes an insulating rod I and an insulating rod II, and the insulating rod I and the insulating rod II are connected by a conductive connecting rod. The insulating rod I is connected to the insulating rod I, and the insulating rod II is used to connect with the operating rod. The conductive connecting rod is a columnar structure with a large middle and small ends. The two ends of the conductive connecting rod are respectively connected to the insulating rod I and the insulating rod II. A protective tube is provided at the connection between the insulating rod I and the insulating rod II to prevent the conductive part of the conductive connecting rod from leaking out. The protective tube is made of insulating material. 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 discharge test rod for subway overhead contact network according to claim 8, characterized in that: The insulating rod II is connected with an installation sleeve for installing the measuring terminal. The side of the installation sleeve is provided with a plane end. The measuring terminal is fixedly installed on the plane end of the side of the installation sleeve by screws.

10. The portable discharge test rod for subway overhead contact network according to claim 5, characterized in that: It also includes a handheld terminal, which is connected to the measurement terminal in a wireless communication manner; The handheld terminal includes a terminal box body, a built-in circuit board II, a display screen, an execution button, a battery charging interface and a battery power supply unit II; the terminal box body used by the handheld terminal is a plastic shell box body, the built-in circuit board II and the battery power supply unit II are both installed in the terminal box body, the upper panel of the terminal box body is provided with the display screen and the execution button, the display screen is used to display the power test information of the measuring terminal, the bottom of the terminal box body is provided with the battery charging interface, the built-in circuit board II is electrically connected to the display screen, the execution button, and the battery charging interface, the built-in circuit board II is provided with a single-chip microcomputer II and a wireless communication unit II, the wireless communication unit II is connected to the single-chip microcomputer II, the handheld terminal receives the power test information sent by the measuring terminal through the wireless communication unit II and displays the information through the display screen, the execution button includes a power button and a discharge execution button, when the discharge execution button of the execution button is pressed and turned on, the single-chip microcomputer II sends a discharge instruction to the measuring terminal through the wireless communication unit II.

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