Track insulation measuring instrument debugging tool

Abstract

The utility model provides a debugging tool for a track insulation measuring instrument, which relates to the technical field of track traffic safety detection and comprises an insulating shell and a band switch, and a plurality of resistors with different resistance values are welded on the band switch and are used for realizing quick access of different resistance values by shifting gears; the signal binding post, the voltage binding post, the current binding post and the steel rail binding post are used for realizing electrical connection with a track insulation measuring instrument and measured equipment, the band switch forms a switchable impedance module through a multi-resistance resistor fixed by welding, and a corresponding resistor is triggered to be connected into a measuring loop when a gear is rotated; the signal binding post, the voltage binding post, the current binding post and the steel rail binding post serve as electrical interfaces and are communicated with a signal source, a measuring circuit and a tested track respectively, and a complete testing link containing excitation signal input and voltage and current acquisition is constructed. The insulating shell seals the elements and connecting lines, internal and external electrical interaction is blocked through the insulation characteristic of materials, and operation safety is ensured.

Description

Technical Field

[0001] This utility model relates to the field of rail transit safety testing technology, and in particular to a debugging fixture for a rail insulation measuring instrument. Background Technology

[0002] Track insulation measuring instruments are crucial equipment for ensuring the safe operation of rail transit. They are used to test the insulation performance of tracks and ensure the normal operation of track circuits. Track insulation measuring instrument debugging fixtures are auxiliary equipment used to debug and calibrate the measuring instruments. Technological improvements in these fixtures are essential for enhancing the accuracy and reliability of track insulation measuring instruments. In this field, the track insulation measuring instrument debugging fixture is resistance-welded to a band switch. By adjusting the band switch, multiple points are tested. This technique aims to improve testing efficiency and accuracy, meeting the actual needs of track safety testing.

[0003] During the testing process of the track insulation measuring instrument, when testing multiple test points of the equipment, the traditional testing method uses alligator clips to clamp the through-hole resistor and then manually changes the resistance value for testing. This frequent manual replacement of the test resistor value not only consumes a lot of time and manpower, but is also prone to affecting the test results due to human error, resulting in low overall efficiency and difficulty in meeting the needs of high-efficiency testing.

[0004] Therefore, this utility model proposes a debugging fixture for a track insulation measuring instrument. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a debugging fixture for a track insulation measuring instrument.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a track insulation measuring instrument debugging fixture, including an insulating shell;

[0007] A band switch has multiple resistors with different resistance values ​​soldered on it, which is used to quickly connect different resistance values ​​by switching the band.

[0008] Signal terminals, voltage terminals, current terminals, and rail terminals are used to achieve electrical connections with the rail insulation measuring instrument and the equipment under test.

[0009] The insulating outer shell encloses the internal circuitry, which includes the band switch, resistor, and terminal connection lines.

[0010] Furthermore, the multiple resistors with different resistance values ​​are fixedly connected to the band switch by welding to form a stable circuit structure, avoiding poor contact caused by frequent plugging and unplugging.

[0011] The beneficial effect of adopting the above-mentioned further solution is that multiple resistors with different resistance values ​​are fixedly connected to the band switch by welding. The welding process makes the resistors and the range contacts of the band switch form a permanent electrical connection. When the band switch is rotated to change the range, the corresponding resistor is connected to the measurement circuit through the fixed solder point, without the need for manual insertion and removal of the resistor components.

[0012] Furthermore, the signal terminal is connected to the signal source output terminal, the voltage terminal is connected to the voltage measurement circuit, the current terminal is connected to the current measurement circuit, the rail terminals are connected to the corresponding polarity of the rail, and the band switch is connected to the resistor and measurement circuit through wires.

[0013] The beneficial effects of adopting the above-mentioned further scheme are as follows: the signal terminal is connected to an external signal source to input the excitation signal into the debugging fixture; the voltage terminal and the current terminal are connected in parallel and series with the measurement circuit respectively to collect the voltage across the resistor and the loop current signal in real time; the rail terminal is connected to the rail circuit through polarity correspondence to construct a complete test circuit; the band switch connects the selected resistor to the circuit through wires to form a switchable standard impedance branch; each terminal forms a closed loop with the internal circuit through wires to realize the coordinated operation of signal transmission, parameter measurement and resistance switching.

[0014] Furthermore, the insulating shell is made of high-quality insulating material, and the internal circuitry is wrapped with multiple layers of insulation to form a double insulation structure, thereby isolating the internal circuitry from the external environment and preventing leakage.

[0015] The beneficial effects of adopting the above-mentioned further solutions are as follows: the insulating shell is injection molded with epoxy resin and other high-molecular insulating materials to form a physical isolation barrier, blocking the direct contact between the external conductive medium and the internal circuit; the internal circuit is wrapped in multiple layers with silicone rubber insulating sleeves, polytetrafluoroethylene insulating tape, etc., to provide full coverage protection for easily leaking parts such as solder joints and wire joints. The double insulation structure completely isolates the internal live parts from the external environment through the dual mechanism of "shell blocking + circuit isolation". Even if a single insulation layer is damaged, the other layer can still maintain its insulation performance.

[0016] Furthermore, the resistance value of the band switch includes at least one of 5Ω, 10Ω, 20Ω, 50Ω, 100Ω, 120Ω, 150Ω, and 200Ω, and the resistance value of at least one of the ranges can be selected from 50Ω to 100Ω.

[0017] The beneficial effects of adopting the above-mentioned further solution are as follows: the band switch integrates multiple sets of range contacts, each set of contacts corresponds to a fixed resistance resistor or is connected to an adjustable resistor module. When the band switch is rotated to switch ranges, the corresponding resistor is connected to the measurement circuit through the sliding contact of the fixed solder point or the adjustable resistor to form a standard impedance loop. Among them, the 50Ω to 100Ω range can be continuously or stepwise adjusted through a potentiometer or resistor array to meet the requirements of fine testing.

[0018] Furthermore, the connection line uses wires of appropriate specifications, which are used to transmit test signals, voltage signals, and current signals to ensure that the signals are accurately transmitted to the measurement system.

[0019] The beneficial effects of adopting the above-mentioned further solutions are as follows: matching wire specifications according to signal type: using shielded coaxial cables for test signals to suppress electromagnetic interference; using high-impedance twisted-pair cables for voltage signal transmission to reduce line voltage drop; using large cross-sectional area wires for current signals to reduce resistance loss; and fixing the two ends of the wires to components such as terminals and band switches by welding or crimping terminals to form a low-impedance transmission path to ensure signal integrity.

[0020] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0021] In this invention, a band switch forms a switchable impedance module by welding and fixing multi-value resistors. When the switch is rotated, the corresponding resistor is triggered to connect to the measurement circuit. The signal terminal, voltage terminal, current terminal, and rail terminal serve as electrical interfaces, respectively connecting the signal source, the measurement circuit, and the track under test, thus constructing a complete test link that includes excitation signal input and voltage and current acquisition. The insulating shell encloses the above components and connecting lines, blocking internal and external electrical interaction through the insulation properties of the material, ensuring operational safety. The three parts work together to achieve fully automated testing from resistance switching and signal transmission to safety protection. Attached Figure Description

[0022] Figure 1 This is a front view of a debugging fixture for a track insulation measuring instrument according to this utility model;

[0023] Figure 2 This is a test diagram of a debugging fixture for a track insulation measuring instrument according to the present invention;

[0024] Figure 3 This is a schematic diagram of the bottom structure of a debugging fixture for a track insulation measuring instrument according to the present invention;

[0025] Figure 4 This is a wiring diagram of the debugging fixture for a track insulation measuring instrument according to this utility model.

[0026] Figure label:

[0027] 1. Insulating housing; 2. Ammeter terminal; 3. Signal terminal; 4. Voltmeter terminal; 5. Rail terminal; 6. Band switch. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figure 1-4 As shown, this utility model provides a technical solution: a track insulation measuring instrument debugging fixture, including an insulating shell 1;

[0030] Band switch 6 has multiple resistors with different resistance values ​​soldered on it, which are used to quickly connect different resistance values ​​by switching the range.

[0031] Signal terminal 3, voltage terminal 4, current terminal 2, and rail terminal 5 are used to achieve electrical connection with the rail insulation measuring instrument and the equipment under test;

[0032] The insulating housing 1 encloses the internal circuitry, which includes a band switch 6, resistors, and terminal connections. The band switch 6 forms a switchable impedance module by welding and fixing multi-value resistors. Rotating the switch triggers the corresponding resistor to connect to the measurement circuit. The signal terminal 3, voltage terminal 4, current terminal 2, and rail terminal 5 serve as electrical interfaces, connecting the signal source, measurement circuit, and the track under test, respectively, thus constructing a complete test link that includes excitation signal input and voltage and current acquisition. The insulating housing 1 encloses the above components and connecting lines, using the insulation properties of the material to block internal and external electrical interactions, ensuring operational safety. The three parts work together to achieve fully automated testing from resistance switching and signal transmission to safety protection.

[0033] Multiple resistors with different resistance values ​​are fixedly connected to the band switch 6 by welding to form a stable circuit structure, avoiding poor contact caused by frequent plugging and unplugging. The welding process makes the resistors and the range contacts of the band switch 6 form a permanent electrical connection. When the band switch 6 is rotated to switch ranges, the corresponding resistor is connected to the measurement circuit through the fixed solder joint, without the need for manual plugging and unplugging of the resistor components.

[0034] Signal terminal 3 is connected to the signal source output, voltage terminal 4 is connected to the voltage measurement circuit, current terminal 2 is connected to the current measurement circuit, rail terminals 5 are connected to the corresponding polarity of the rail, band switch 6 is connected to the resistor and measurement circuit via wires, signal terminal 3 is connected to an external signal source to input the excitation signal into the debugging fixture; voltage terminal 4 and current terminal 2 are connected in parallel and series with the measurement circuit respectively to collect the voltage across the resistor and the loop current signal in real time; rail terminals 5 are connected to the rail circuit with corresponding polarity to construct a complete test loop; band switch 6 connects the selected resistor to the circuit via wires to form a switchable standard impedance branch, and each terminal forms a closed loop with the internal circuit through wires to realize the coordinated operation of signal transmission, parameter measurement and resistance switching.

[0035] The insulating outer shell 1 is made of high-quality insulating material, and the internal circuit is wrapped with multiple layers of insulation to form a double insulation structure to isolate the internal circuit from the external environment and prevent leakage. The insulating outer shell 1 is injection molded with epoxy resin and other high-molecular insulating materials to form a physical isolation barrier to block direct contact between the external conductive medium and the internal circuit. The internal circuit is wrapped with multiple layers of silicone rubber insulating sleeves, polytetrafluoroethylene insulating tape, etc. to provide full coverage protection for easily leaking parts such as solder joints and wire joints. The double insulation structure completely isolates the internal live parts from the external environment through the dual mechanism of "outer shell blocking + circuit isolation". Even if one insulation layer is damaged, the other layer can still maintain its insulation performance.

[0036] The band switch 6 has a resistance value of at least one of 5Ω, 10Ω, 20Ω, 50Ω, 100Ω, 120Ω, 150Ω, and 200Ω, and the resistance value of at least one range can be selected within the range of 50Ω to 100Ω. The band switch 6 integrates multiple sets of range contacts, each set of contacts corresponding to a fixed resistance value of 5Ω, 10Ω, etc., or connected to an adjustable resistor module with a range of 50Ω to 100Ω. When the band switch 6 is rotated to switch ranges, the corresponding resistor is connected to the measurement circuit through the fixed solder joint or the sliding contact of the adjustable resistor to form a standard impedance loop. The 50Ω to 100Ω range can be continuously or steppedly adjusted through a potentiometer or resistor array to meet the requirements of fine testing.

[0037] The connection lines use appropriately sized wires to transmit test signals, voltage signals, and current signals, ensuring accurate signal transmission to the measurement system. The wire specifications are matched according to the signal type: test signals use shielded coaxial cables to suppress electromagnetic interference; voltage signals use high-impedance twisted-pair cables to reduce line voltage drop; current signals use large cross-sectional area wires to reduce resistance loss. The two ends of the wires are fixedly connected to the terminals, band switches, and other components by welding or crimping terminals to form a low-impedance transmission path and ensure signal integrity.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A debugging fixture for a track insulation measuring instrument, comprising an insulating housing (1), characterized in that... ； It also includes a band switch (6), on which multiple resistors of different resistance values ​​are welded, which are used to achieve rapid access of different resistance values ​​by switching gears; Signal terminal (3), voltmeter terminal (4), ammeter terminal (2) and rail terminal (5) are used to realize the electrical connection with the track insulation measuring instrument and the equipment under test; The insulating shell (1) encloses the internal circuit, which includes the band switch (6), resistors, and connection lines of terminals.

2. The debugging fixture for a track insulation measuring instrument according to claim 1, characterized in that: The multiple resistors with different resistance values ​​are fixedly connected to the band switch (6) by welding to form a stable circuit structure, avoiding poor contact caused by frequent plugging and unplugging.

3. The debugging fixture for a track insulation measuring instrument according to claim 1, characterized in that: The signal terminal (3) is connected to the signal source output terminal, the voltmeter terminal (4) is connected to the voltage measurement circuit, the ammeter terminal (2) is connected to the current measurement circuit, the rail terminal (5) is connected to the corresponding polarity of the rail, and the band switch (6) is connected to the resistor and measurement circuit through a wire.

4. The debugging fixture for a track insulation measuring instrument according to claim 1, characterized in that: The insulating shell (1) is made of high-quality insulating material, and the internal circuit is wrapped with multiple layers of insulation to form a double insulation structure to isolate the internal circuit from the external environment and prevent leakage.

5. The debugging fixture for a track insulation measuring instrument according to claim 1, characterized in that: The connection lines use conductors of appropriate specifications, which are used to transmit test signals, voltage signals, and current signals to ensure that the signals are accurately transmitted to the measurement system.

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