Lighting unit test board for railway signals

Abstract

The utility model relates to a lighting unit test board for a railway signal lamp, which comprises a test board body provided with a lighting unit placing station and a test circuit, the test circuit comprises a power supply circuit connected with a primary wire side of the lighting unit, a load test circuit connected with a secondary wire side of the lighting unit, a conversion test circuit connected with a main wire side and an auxiliary wire side of the lighting unit, and a timer circuit connected with an alarm terminal of the lighting unit. And a main loop of the load test circuit and the conversion test circuit is provided with a test mode selection relay switch. All the test circuits are integrated in the test bench, and all the test circuits are combined through the mode selection relay switch, so that the test working efficiency of the lighting unit can be greatly improved, and manual labor is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of railway equipment detection, and relates to the testing technology of the lighting unit for railway signal, in particular to a lighting unit test board. BACKGROUND

[0002] The railway signal lighting unit is a device specially used for railway signal equipment, and its main functions include lighting of the signal machine, filament conversion and filament positioning alarm. The device is connected in series with the main filament of the signal bulb through the relay coil, and when the main filament is broken, the auxiliary filament is lit to complete the circuit conversion, ensuring the uninterrupted display of the signal lamp and the safety of train operation. Specifically, the application field of the railway signal lighting unit is very wide, including but not limited to the high column and low column signal machines in the station and the trackside signal machine, etc. These devices play a crucial role in railway transportation, guiding the train to move forward by lighting different colored lights, ensuring the safety and efficiency of train operation. Therefore, the detection of the lighting unit plays an important role in the safety of railway operation.

[0003] In the prior art, the detection of the lighting unit is mainly electrical property detection and comparative test of the to-be-tested lighting unit, and the electrical property detection includes no-load current test, no-load voltage test, load property test, conversion property test, conversion time test and voltage difference test of the main and auxiliary filament output ends. During the test process, the voltage source and the current source need to be switched multiple times, such as 220V alternating voltage, 10V-14V direct voltage, primary side current, secondary side load current, etc. The prior art needs to manually connect and disconnect the power supply during switching, which is very inconvenient, resulting in low efficiency of the test process and failing to meet the work needs. UTILITY MODEL CONTENTS

[0004] The utility model discloses a lighting unit test board for railway signal lamp, which integrates all power supply devices in a test board to realize the switching of different power supplies by means of the relay switch control, thereby efficiently completing the test work.

[0005] The utility model discloses the technical scheme is a kind of lighting unit test board for railway signal lamp, including the test board body with the test circuit being set with lighting unit placement station, the test circuit includes the power supply circuit for connecting lighting unit primary silk side, connects the load test circuit of lighting unit secondary silk side, connects the conversion test circuit of lighting unit main and auxiliary silk side, and the timer circuit being connected with the alarm wiring end of lighting unit,

[0006] The power supply circuit comprises a general switch connected to 220V AC, a voltage regulator, a first ammeter connected to the power supply circuit, a first switch connected in series with the first ammeter, a current-limiting resistor, a surge current test switch and an oscilloscope connected in parallel with the current-limiting resistor, and a first voltmeter connected to the output of the voltage regulator,

[0007] The load test circuit comprises a secondary voltage test gear switch connected to the secondary filament side of the lighting unit, a variable load, a second ammeter and a second switch connected in series, and a second voltmeter connected in parallel to the variable load,

[0008] The conversion test circuit comprises a third ammeter and a third switch connected to the main filament of the lighting unit, an analog signal lamp connected to the output of the lighting unit, a voltage switching switch connected to the main and auxiliary filament of the lighting unit, and a third voltmeter connected in parallel between the main and auxiliary filament and the common terminal,

[0009] A test mode selection relay switch is arranged on the main circuit of the load test circuit and the conversion test circuit.

[0010] The timer circuit comprises a timer connected between 220V AC and the alarm connection terminal of the lighting unit, and peripheral matching resistors and an indicator lamp circuit.

[0011] A voltage stabilizer is further arranged between the voltage regulator and 220V AC.

[0012] All the ammeters and voltmeters are connected in parallel with a backup interface.

[0013] The beneficial effects of the utility model are that all the test circuits are integrated in the test bench, and all the test circuits are combined through the mode selection relay switch, so that the test efficiency of the lighting unit is greatly improved, the labor is saved, and the personal safety of the detection personnel is protected. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is the test bench circuit principle diagram of the utility model.

[0015] Figure 2 is the characteristic test equivalent circuit test principle diagram under the no-load mode.

[0016] Figure 3 is the characteristic test equivalent circuit test principle diagram under the load mode.

[0017] Figure 4 is the conversion characteristic test equivalent circuit test principle diagram.

[0018] Figure 5 is the main and auxiliary filament output voltage difference test equivalent circuit test principle diagram.

[0019] Figure 6 is the starting impulse current test equivalent circuit test schematic diagram.

[0020] In the drawing, WY represents a voltage stabilizer, Q represents a total switch, TY represents a voltage regulator, SBQ represents an oscilloscope, DD represents a lighting unit, DP represents an analog signal lamp, JS represents a timer, A1 represents a first ammeter, A2 represents a second ammeter, A3 represents a third ammeter, V1 represents a first voltmeter, V2 represents a second voltmeter, V3 represents a third voltmeter, RL represents a variable load, K5 represents a first switch, K2 represents a second switch, K7 represents a third switch, K6 represents an impulse current test switch, K1 represents a secondary voltage test gear switch, K3 represents a test mode selection relay switch, K4-1 and K4-2 represent double control switches, K8 represents a voltage switching switch, R1 and R2 represent resistors, and LED represents an indicator lamp. DETAILED DESCRIPTION

[0021] Referring to Figure 1 The utility model discloses a lighting unit test board for railway signal lamp, including setting up the test board body of lighting unit DD placement station and test circuit, test circuit includes the power supply circuit for connecting lighting unit DD primary silk side, the load test circuit of connecting lighting unit DD secondary silk side, the conversion test electric of connecting lighting unit DD main vice silk side and the timer circuit of connecting lighting unit DD alarm wiring end,

[0022] The power supply circuit includes a total switch Q connected to 220V alternating current, a voltage regulator TY, a first ammeter A1 connected to the power supply circuit, a first switch K5 connected in series with the first ammeter A1, a current-limiting resistor R2, an impulse current test switch K6 and an oscilloscope SBQ connected in parallel with the current-limiting resistor R2, and a first voltmeter V1 connected to the output end of the voltage regulator TY,

[0023] The load test circuit includes a secondary voltage test gear switch K1 connected to the secondary silk side of the lighting unit DD, a variable load RL, a second ammeter A2 and a second switch K2 connected in series, and a second voltmeter V2 connected in parallel across the variable load RL,

[0024] The conversion test circuit includes a third ammeter A3 and a third switch K7 connected to the main lamp filament of the lighting unit DD, an analog signal lamp DP connected to the output end of the lighting unit DD, a voltage switching switch K8 connected to the main and auxiliary lamp filament end of the lighting unit DD, and a third voltmeter V3 connected in parallel between the main and auxiliary lamp filament end and the common end,

[0025] The main circuit of the load test circuit and the conversion test circuit is provided with a test mode selection relay switch K3.

[0026] The timer circuit comprises a timer JS connected between 220V AC and a connection point lamp unit DD alarm wiring end, and peripheral supporting resistance and indicator lamp circuit.

[0027] A voltage stabilizer WY is further arranged between the voltage regulator TY and 220V AC to ensure stable input voltage.

[0028] All ammeters and voltmeters are connected in parallel with spare interfaces.

[0029] The specific testing process of the testing table is as follows:

[0030] When the no-load characteristic test is performed, the test mode selection relay switch K3 is selected to the no-load test position K3-2, and the equivalent diagram is as shown in Figure 2 , the first switch K5 is closed, the secondary voltage test position switch K1 is adjusted to the no-load position, the voltage regulator TY is adjusted to keep the reading of the first voltmeter V1 at 220V, the current value of the first ammeter A1 at this time is read, and whether the no-load current meets the test standard is observed; the voltage regulator TY is adjusted to keep the reading of the first voltmeter V1 at 220V, the secondary voltage test position switch K1 is adjusted to the 13V, 14V and 16V positions respectively, and the readings on the second voltmeter V2 are read respectively, and whether the voltage under no-load meets the test standard is observed.

[0031] The test mode selection relay switch K3 is selected to the load test position K3-1, and the equivalent diagram is as shown in Figure 3 , the first switch K5 and the second switch K2 are closed, the voltage regulator TY is adjusted to keep the reading of the first voltmeter V1 at 220V, the secondary voltage test position switch K1 is adjusted to the 13V, 14V and 16V positions respectively, and the readings on the second voltmeter V2 are read respectively, and whether the voltage under load meets the test standard is observed.

[0032] When the conversion characteristic test is performed, the test mode selection relay switch K3 is selected to the main lamp filament switching position 3-4 and the auxiliary lamp filament switching position 3-3 at the same time, the secondary voltage test position switch K1 is adjusted to the no-load position, and the equivalent diagram is as shown in Figure 4 , the double-control switch K4-1 is closed, the third switch K7 is closed, the voltage regulator TY is adjusted to keep the reading of the first voltmeter V1 at 220V, the voltage regulator TY is reversely adjusted to gradually reduce the reading of the third ammeter A3, the reading of the third ammeter A3 when the indicator lamp LED is extinguished is the release value, and the reading is further reduced to zero, then the voltage regulator TY is forwardly adjusted to gradually increase the reading of the third ammeter A3, the reading of the third ammeter A3 when the indicator lamp LED is bright is the working value, and whether the release value and the working value meet the test standard is observed.

[0033] When the conversion time test is performed, the first voltmeter V1 is adjusted to read 220V, and the double control switch K4-1 and K4-2 are simultaneously turned off. The value of the chronograph JS is read to see if it meets the test standard.

[0034] The voltage difference test of the main and auxiliary filament output terminals is performed. The test mode selection relay switch K3 is selected to simultaneously select the main filament switching gear 3-4 and the auxiliary filament switching gear 3-3. The secondary voltage test gear switch K1 is adjusted to T. Referring to Figure 5 , the third switch K7 and the double control switch K4-1 are closed. The voltage switching switch K8 is adjusted to Z gear. The second voltmeter V2 is adjusted to read 12V. The third voltmeter V3 is recorded to read the voltage value of the main filament output. The voltage switching switch K8 is adjusted to F gear. The third voltmeter V3 is recorded to read the voltage value of the auxiliary filament output.

[0035] When the starting current impact test is performed, the first voltmeter V1 is adjusted to read 220V. The impact current test switch K6 is closed and opened at intervals. The oscilloscope SBQ is used to capture the impact wave with a pulse width of 2-5ms. The peak voltage of the impact wave is tested. The starting current is calculated and compared with the rated current of the primary coil to see if it meets the test standard. The test is repeated for 5 times at intervals of not less than 30s.

[0036] In addition, when the measured point lamp unit is placed in the environmental box, it can still be connected to the test bench through the cable to realize different environmental temperature tests.

[0037] The above test process only needs to change the mode of the test mode selection relay switch K3 and manually adjust the closing or opening of some switches to complete the entire test process. Compared with the previous manual back-and-forth replacement of ammeters, voltmeters, and various DC power supplies, the test work efficiency is greatly improved, and the personal safety of the detection personnel is protected.

Claims

1. A test board for a railway signal light unit, comprising a test board body provided with a light unit (DD) placement station and a test circuit, characterized in that: The test circuit comprises a power supply circuit connected to the primary filament side of the lighting unit (DD), a load test circuit connected to the secondary filament side of the lighting unit (DD), a conversion test circuit connected to the main and auxiliary filament side of the lighting unit (DD), and a timer circuit connected to the alarm terminal of the lighting unit (DD), The power supply circuit comprises a main switch (Q) connected to 220V AC, a voltage regulator (TY), a first ammeter (A1) connected to the power supply circuit, a first switch (K5) connected in series with the first ammeter (A1), a current-limiting resistor (R2), an impulse current test switch (K6) and an oscilloscope (SBQ) connected in parallel with the current-limiting resistor (R2), and a first voltmeter (V1) connected to the output of the voltage regulator (TY), The load test circuit comprises a secondary voltage test switch (K1) connected to the secondary filament side of the lighting unit (DD), a variable load (RL), a second ammeter (A2) and a second switch (K2) connected in series, and a second voltmeter (V2) connected in parallel across the variable load (RL), The conversion test circuit comprises a third ammeter (A3) and a third switch (K7) connected to the main filament of the lighting unit (DD), a simulation signal lamp (DP) connected to the output of the lighting unit (DD), a voltage switch (K8) connected to the main and auxiliary filament side of the lighting unit (DD), and a third voltmeter (V3) connected in parallel between the main and auxiliary filament side and the common terminal, A test mode selection relay switch (K3) is provided on the main circuit of the load test circuit and the conversion test circuit.

2. The test board for a point lamp unit for a railway signal according to claim 1, characterized by: The timer circuit comprises a timer (JS) connected between 220V AC and the alarm terminal of the lighting unit (DD), and peripheral supporting resistors and an indicator circuit.

3. The test board for a point lamp unit of a railway signal according to claim 1, characterized in that: A voltage stabilizer (WY) is further provided between the voltage regulator (TY) and 220V AC.

4. The test board for a point lamp unit of a railway signal according to claim 1, characterized in that: All ammeters and voltmeters are connected in parallel with a backup interface.

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