Intelligent detection tool

Abstract

The utility model discloses an intelligent detection tool which comprises a detection line, a working line and a PLC module, the working line is provided with a first relay and a three-phase electrical parameter comprehensive tester, and three-phase alternating current is connected with a fan heater through the first relay; the detection circuit is provided with a divider resistor, a second relay and a second power supply, the second power supply is connected with a UV of the warm air blower through the second relay, the PLC module is connected with the first relay and the second relay, the PLC module detects voltage changes on the two sides of the divider resistor through a circuit, and the PLC module is connected with the detection sensor. The detection sensor is correspondingly arranged at an air outlet of the fan heater, and the PLC module is connected with a temperature controller of the fan heater through a feedback circuit; according to the utility model, when the motor train unit fan heater maintenance test is carried out, the operation program is optimized, the current / voltage sensor and the temperature sensor are used to acquire data, the data is strict and reliable, and the comprehensive detection of multiple parts of the fan heater is realized.

Description

Technical Field

[0001] This utility model relates to the field of high-speed train inspection technology, specifically to an intelligent inspection tooling. Background Technology

[0002] The main working principle of the heater in high-speed trains is as follows: When the heater receives three-phase power, the fan operates, and the heating element is simultaneously energized. The airflow generated by the fan, heated by the heating element, is discharged through the outlet at the bottom of the heater. A temperature sensor is installed at the outlet; when the discharged warm air temperature reaches 35℃, the sensor sends a trigger signal, which is transmitted to the control cabinet via the temperature controller feedback interface. At this point, the power supply to the heater is cut off, keeping the airflow temperature at the outlet below 35℃. If the fan malfunctions and stops operating, the heater will automatically shut off. The heating element continues to heat the air in the heater. As the hot air expands due to heat, its density decreases, and it begins to rise. The temperature sensor below cannot detect the temperature signal change and therefore cannot provide a normal feedback signal. When the air temperature reaches 90°C, the primary temperature control protection B1 above the heating element disconnects (B1 reconnects when the air temperature drops to 60°C), thus breaking the circuit and stopping the heating element. When the primary temperature control protection B1 malfunctions and fails to disconnect automatically, the temperature continues to rise to 140°C, causing the fuse of the secondary temperature control protection B2 to blow, breaking the circuit and stopping the heating element.

[0003] Currently, after the heaters on high-speed trains are disassembled, they need to be functionally tested. The existing testing method is as follows: power is supplied to the heater, and as the heater rods continuously heat up, the two probes of a multimeter are connected to the two pins of the temperature controller feedback interface. The test is conducted to see if the circuit changes from an open state to a closed state as the temperature rises. If a closed loop is formed, it indicates that the temperature sensor and the temperature controller feedback function are normal. However, when using a multimeter to monitor the temperature controller feedback, it can only determine whether the temperature controller changes from an open state to a closed state, but it cannot know the air temperature at the air outlet when the state changes. Therefore, it cannot be guaranteed whether the temperature controller is responding at 35°C, and it is impossible to confirm whether the temperature sensor is functioning properly.

[0004] In view of the above-mentioned defects, the creator of this utility model has finally obtained this utility model after a long period of research and practice. Utility Model Content

[0005] To address the aforementioned technical deficiencies, this utility model provides an intelligent testing fixture, comprising a testing circuit, a working circuit, and a PLC module. The working circuit includes a first relay and a three-phase electrical parameter comprehensive tester. Three-phase AC power is connected to the heater via the first relay. The three-phase electrical parameter comprehensive tester is used to detect the voltage and current data of the working circuit. The testing circuit includes a voltage divider resistor, a second relay, and a second power supply. The second power supply is connected to the UV phase of the heater via the second relay. The first power supply is connected to the PLC module for power supply. The PLC module is connected to both the first and second relays, and detects voltage changes across the voltage divider resistor via a circuit. The PLC module is also connected to a detection sensor, which is correspondingly positioned at the air outlet of the heater. The PLC module is connected to the temperature controller of the heater via a feedback circuit.

[0006] Preferably, the intelligent detection fixture also includes an operation panel, which is connected to the PLC module for data transfer.

[0007] Preferably, the intelligent detection fixture is also equipped with a main switch, which is connected to the PLC module and the operation panel.

[0008] Preferably, the working circuit is also equipped with a leakage current protection device, and the three-phase AC power is connected to the first relay through the leakage current protection device.

[0009] Preferably, the intelligent testing fixture further includes a fixture housing, the main switch, the operation panel and the three-phase electrical parameter comprehensive tester are all installed on the outer wall of the fixture housing, and the PLC module, the first power supply, the first relay, the second relay, the second power supply and the leakage protection device are all installed inside the fixture housing.

[0010] Preferably, the tooling housing includes a box body and a cover plate. The box body and the cover plate are rotatably connected on one side by a hinge and detachably connected on the other side by a locking assembly. The main switch, the operation panel, the three-phase electrical parameter comprehensive tester, and the PLC module are all fixedly mounted on the cover plate. The first power supply, the first relay, the second relay, the second power supply, and the leakage protection device are all fixedly mounted inside the box body.

[0011] Preferably, the side of the box is provided with a wiring hole for passing through connecting pipelines.

[0012] Preferably, the intelligent detection fixture also includes a heat insulation cover, which is correspondingly positioned at the air outlet of the heater.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: when conducting maintenance tests on the heating fan of a high-speed train using this utility model, the operation procedure is optimized, and data is collected using current / voltage sensors and temperature sensors. The data is rigorous and reliable, enabling comprehensive testing of multiple components of the heating fan. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural view of the intelligent detection tooling;

[0015] Figure 2 This is a front view of the structure of the intelligent detection tooling;

[0016] Figure 3 This is a top view of the structure of the intelligent detection tooling;

[0017] Figure 4 This is a schematic diagram of the circuit connection of the intelligent detection tooling;

[0018] Figure 5 This is a schematic diagram of the circuit connection of the heater.

[0019] The numbers in the image represent:

[0020] 1-Tooling housing; 2-Main switch; 3-Operation panel; 4-Three-phase electrical parameter comprehensive tester; 5-PLC module; 6-First power supply; 7-Leakage protection device; 8-First relay; 9-Second relay; 10-Second power supply; 11-Wiring hole; 12-Warm air blower; 13-Voltage divider resistor; 14-Detection sensor; 15-Feedback circuit; 16-Temperature control first-level protection switch; 17-Fan unit; 18-Heating wire; 19-Current limiting resistor. Detailed Implementation

[0021] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.

[0022] Example 1

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, Figure 1 This is a three-dimensional structural view of the intelligent detection tooling; Figure 2 This is a front view of the structure of the intelligent detection tooling; Figure 3 This is a top view of the structure of the intelligent detection tooling.

[0024] The intelligent detection fixture of this utility model includes a detection circuit, a working circuit, and a PLC module 5. The working circuit is equipped with a first relay 8 and a three-phase electrical parameter comprehensive tester 4. Three-phase AC power is connected to a heater 12 via the first relay 8 to supply power to the heater 12. The three-phase electrical parameter comprehensive tester 4 is used to detect the three-phase voltage and current data of the working circuit, enabling real-time monitoring of the voltage input to the heater 12 and the current of each phase. When the temperature control first-level protection B1 changes from the on state to the off state, the changes in three-phase current and voltage can be accurately obtained. The detection circuit is equipped with a voltage divider resistor 13 and a second... A relay 9 and a second power supply 10 are connected to the UV of the heater 12 via the second relay 9 to provide power for the heater 12. A first power supply 6 is connected to the PLC module 5 to provide power. The PLC module 5 is connected to both the first relay 8 and the second relay 9, and the PLC module 5 detects the voltage change across the voltage divider resistor 13 via a circuit. The PLC module 5 is connected to a detection sensor 14, which is correspondingly located at the air outlet of the heater 12. The PLC module 5 is connected to the temperature controller of the heater 12 via a feedback circuit 15.

[0025] The intelligent testing fixture also includes an operation panel 3, which is connected to the PLC module 5. The operation panel 3 is a human-machine interface (HMI) that displays temperature change curves, outlet temperature, B1 connection / disconnection status, and outlet temperature sensor feedback values. It also allows setting the heating time and includes start-up and emergency stop buttons for protection. After preparation, operators can use the operation panel 3 to complete testing and recording, while simultaneously observing the temperature changes of the heater 12 in real time to ensure the accuracy of the test.

[0026] The intelligent detection fixture is also equipped with a main switch 2, which is connected to the PLC module 5 and the operation panel 3 to control the opening and closing of the entire utility model.

[0027] The working circuit is also equipped with a leakage current protection device 7. The three-phase AC power is connected to the first relay 8 through the leakage current protection device 7 to realize leakage current protection.

[0028] The intelligent testing fixture also includes a fixture housing 1. The main switch 2, the operation panel 3, and the three-phase electrical parameter comprehensive tester 4 are all installed on the outer wall of the fixture housing 1. The PLC module 5, the first power supply 6, the first relay 8, the second relay 9, the second power supply 10, and the leakage protection device 7 are all installed inside the fixture housing 1 to enable external observation and operation by the operator and internal protection of the circuit.

[0029] Generally, the tooling housing 1 includes a box body and a cover plate. The box body and the cover plate are rotatably connected on one side by a hinge, and detachably connected on the other side by a locking assembly. The main switch 2, the operation panel 3, the three-phase electrical parameter comprehensive tester 4, and the PLC module 5 are all fixedly mounted on the cover plate. The first power supply 6, the first relay 8, the second relay 9, the second power supply 10, and the leakage protection device 7 are all fixedly mounted inside the box body to facilitate pipeline connection and maintenance installation of this utility model.

[0030] The side of the box is provided with wiring holes, through which the connecting lines of each component are run to assist in wiring.

[0031] Preferably, the intelligent testing fixture also includes a heat insulation cover, which is correspondingly set at the air outlet of the heater 12 to quickly increase the air outlet temperature of the heater 12 and shorten the testing cycle.

[0032] When conducting maintenance tests on the EMU heater 12 using this utility model, the operating procedures are optimized, and current / voltage sensors and temperature sensors are used to collect data. The data is rigorous and reliable, enabling comprehensive testing of multiple components of the heater 12.

[0033] Example 2

[0034] The main switch 2 is mounted on the surface of the fixture housing 1. Above the main switch 2, the operation panel 3 is mounted on the surface of the fixture housing 1. The operation panel 3 is a human-machine interface (HMI) that displays temperature change curves, outlet temperature, the on / off status of B1, and the feedback value from the outlet temperature sensor. It also allows setting the heating time and includes start-up test and emergency stop buttons for protection. After preparation, operators can use the operation panel 3 to complete tests and record data, while simultaneously observing the temperature changes of the heater 12 in real time to ensure the accuracy of the test. A three-phase electrical parameter comprehensive tester 4 is mounted on the surface of the fixture housing 1, located to one side of the main switch 2. The three-phase electrical parameter comprehensive tester 4 can display the UVW three-phase voltage and current data in real time, enabling real-time monitoring of the voltage and current of each phase input to the heater 12. When the temperature control protection B1 changes from on to off, the changes in three-phase current and voltage can be accurately obtained.

[0035] The PLC module 5 is installed inside the tooling box 1 above the three-phase electrical parameter comprehensive tester 4. The first power supply 6 is also installed inside the tooling box 1. The leakage protection device 7 is installed inside the tooling box 1 on one side of the first power supply 6. The first relay 8, the second relay 9 and the second power supply 10 are installed inside the tooling box 1 below the first power supply 6.

[0036] like Figure 4 and Figure 5 As shown, Figure 4 This is a schematic diagram of the circuit connection of the intelligent detection tooling; Figure 5 This is a schematic diagram of the circuit connection of the heater.

[0037] The specific working principle of this utility model is as follows: First, place the detection sensor 14 near the temperature sensor of the heater 12, install the heat preservation cover on the front of the heater 12 and fix it in place, then connect this utility model to the heater 12, turn on the power switch, start the operation panel 3 and the three-phase electrical parameter comprehensive tester 4, and set the heating time to 250s.

[0038] When the test is clicked, the fan of the heater 12 starts to rotate. The detection sensor 14 monitors the air temperature at the air outlet and displays the monitored data in real time on the air outlet temperature column of the operation panel 3. When the temperature reaches above 35°C and remains there for a period of time, the temperature sensor of the heater 12 is triggered. The PLC module 5 obtains the feedback signal from the temperature controller through the feedback circuit 15. At this time, the feedback value column on the operation panel 3 displays the temperature value of the detection sensor 14 when the temperature sensor is triggered, thereby determining whether the temperature controller of the heater 12 is triggered and cut off at 35°C, and detecting whether the temperature sensor is working properly.

[0039] From the start of the test, B1, i.e., the temperature control level 1 protection switch 16, is always displayed as "on". As the temperature continues to rise, the upper right corner of the operation panel 3 switches from "B1 on" to "B1 off", indicating that B1 is working normally. The three-phase AC power is connected to the leakage protection device 7 and controls the first relay 8 to supply power to the fan section 17 of the heater 12. The UV phase supplies power to the heating wire 18. The three-phase electrical parameter comprehensive tester 4 is connected in series in the working circuit to act as a voltmeter and ammeter to display the voltage and current changes in the circuit in real time.

[0040] The PLC module 5 controls the first relay 8. When the test option is clicked on the human-machine interface, the PLC module 5 energizes the coil of the first relay 8. The PLC module 5 internally sets two trigger values ​​for the first relay 8 to disconnect: one is when the temperature value of the detection sensor 14 reaches 80℃, and the other is when the test duration has ended. When one of these trigger values ​​is met, the control coil disconnects the first relay 8, stopping the power supply to the heater 12. At this time, the PLC module 5 controls the second relay 9 to close, the detection circuit is connected, and the heater 12 starts working. At this time, the heating wire 18 is connected in parallel with the current-limiting resistor 19, and is powered by the... The second power supply 10 converts AC 220V to DC 24V to power the detection circuit. A 500Ω voltage divider resistor 13 is connected in series in the detection circuit. The PLC module 5 monitors the voltage across the voltage divider resistor 13. At this time, although the heater 12 stops working, the residual heat of the heating wire 18 will continue to heat the air until the air temperature reaches above 90°C, causing the temperature control first-level protection switch 16 of the heater 12 to open. At this time, the resistance value in the detection circuit changes, which causes the current in the circuit to change, and thus the voltage of the series-connected voltage divider resistor 13 changes. After the PLC module 5 detects the data change, the display on the human-machine interface changes from B1 on to B1 off.

[0041] Specifically, when the air temperature at the outlet reaches 90 degrees Celsius, the first relay 8 is immediately disconnected. The second relay 9 is then connected to test the voltage. Due to the lag in sensitivity between the mechanical temperature protection switch and the PLC electronic temperature sensor, the temperature control primary protection switch B1 is not yet disconnected, and the resistance between the U and V terminals is 122 ohms. The PLC module 5 measures a voltage of 9.64V on the voltage divider resistor 13. After approximately several tens of seconds, the temperature control primary protection switch 16 disconnects, and the resistance between the U and V terminals becomes 1000 ohms. At this point, the voltage measured by the PLC module 5 changes from 9.64V to 4V. After a period of time, once the heater 12 has cooled down, the temperature control primary protection switch 16 automatically closes, and the voltage measured by the PLC module 5 on the voltage divider resistor 13 changes back from 4V to 9.64V. The change in voltage on the voltage divider resistor 13 indicates whether the temperature control primary protection switch 16 is functioning correctly.

[0042] The above description is merely a preferred embodiment of the present utility model and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present utility model, all of which will fall within the protection scope of the present utility model.

Claims

1. An intelligent inspection fixture, characterized in that, The device includes a detection circuit, a working circuit, and a PLC module. The working circuit is equipped with a first relay and a three-phase electrical parameter comprehensive tester. Three-phase AC power is connected to the heater via the first relay. The three-phase electrical parameter comprehensive tester is used to detect the voltage and current data of the working circuit. The detection circuit is equipped with a voltage divider resistor, a second relay, and a second power supply. The second power supply is connected to the UV phase of the heater via the second relay. The first power supply is connected to the PLC module for power supply. The PLC module is connected to both the first and second relays. The PLC module detects the voltage change across the voltage divider resistor via a circuit. The PLC module is connected to a detection sensor, which is correspondingly located at the air outlet of the heater. The PLC module is connected to the temperature controller of the heater via a feedback circuit.

2. The intelligent detection fixture as described in claim 1, characterized in that, The intelligent testing fixture also includes an operation panel, which is connected to the PLC module for data transfer.

3. The intelligent detection fixture as described in claim 2, characterized in that, The intelligent detection fixture is also equipped with a main switch, which is connected to the PLC module and the operation panel.

4. The intelligent detection fixture as described in claim 3, characterized in that, The working circuit is also equipped with a leakage current protection device, and the three-phase AC power is connected to the first relay through the leakage current protection device.

5. The intelligent detection fixture as described in claim 4, characterized in that, The intelligent testing fixture also includes a fixture housing. The main switch, the operation panel, and the three-phase electrical parameter comprehensive tester are all located on the outer wall of the fixture housing. The PLC module, the first power supply, the first relay, the second relay, the second power supply, and the leakage protection device are all located inside the fixture housing.

6. The intelligent detection fixture as described in claim 5, characterized in that, The tooling housing includes a box body and a cover plate. The box body and the cover plate are rotatably connected on one side by a hinge and detachably connected on the other side by a locking assembly. The main switch, the operation panel, the three-phase electrical parameter comprehensive tester and the PLC module are all fixedly mounted on the cover plate. The first power supply, the first relay, the second relay, the second power supply and the leakage protection device are all fixedly mounted inside the box body.

7. The intelligent detection fixture as described in claim 6, characterized in that, The side of the box is provided with wiring holes for connecting pipelines.

8. The intelligent detection fixture as described in claim 1, characterized in that, The intelligent detection fixture also includes a heat insulation cover, which is correspondingly installed at the air outlet of the heater.

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