Locomotive accessory testing device

Abstract

The invention relates to the technical field of locomotive accessory maintenance, in particular to a locomotive accessory testing device. Comprising an adjustable power supply circuit, a first test circuit, a second test circuit and a third test circuit, the adjustable power supply circuit is used for adjusting output voltage, and the first test circuit is connected with the adjustable power supply circuit and used for outputting analog signal voltage of a locomotive traction motor voltage sensor and a brake current sensor; the second test circuit is connected with the output end of the adjustable power supply circuit and is used for outputting linear loading current, and the third test circuit comprises a first relay and a second relay, is used for simulating two different electric pneumatic valve loads on a locomotive and is provided with a first display lamp and a second display lamp in one-to-one correspondence. According to the invention, the test circuits of three electrical accessories on a railway locomotive are integrated together, so that the problem that the electrical accessories cannot be completely tested for a long time is scientifically and effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of locomotive parts inspection and repair, in particular to a locomotive parts testing device. Background Art

[0002] The electric brake recorder, fault excitation regulator, and electronic controller are three types of electrical accessories on railway locomotives, and all three accessories need to be tested for performance after ground maintenance before they can be installed and used. Among them, the electric brake recorder is used for electrical braking on the locomotive to multiply the locomotive power generation voltage and current signals, drive the electromagnetic counter to operate, and record the accumulated power generation energy; the fault excitation regulator is an emergency excitation device after the main excitation device of the diesel locomotive fails. It can avoid loading shocks, reduce the load shocks of the diesel engine and main generator, and the traction shocks of the locomotive by linearly increasing the excitation current to the set value, so as to make the locomotive run smoothly; the electronic controller is used for the regeneration and drying control of the double-tower air dryer of the diesel and electric locomotives, and works alternately in time. It has a time accumulation function when the compressor is restarted after stopping, so as to avoid the serious imbalance of the drying and regeneration time of the two towers, which affects the air drying quality. However, the above three locomotive accessories do not have dedicated testing devices, and can only perform simple power-on operations. It is impossible to conduct a complete test on the accessories, which will have a great impact on the quality of accessory maintenance. Summary of the invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a locomotive accessories testing device to solve the problem in the prior art that a brake recorder, a fault excitation regulator and an electronic controller cannot be fully tested.

[0004] The present invention discloses a locomotive accessory testing device, comprising an adjustable power supply circuit, a first testing circuit, a second testing circuit and a third testing circuit; The adjustable power supply circuit is used to adjust the output voltage, and the output end of the adjustable power supply circuit is connected in parallel with a first DC voltmeter; The first test circuit is connected to the output end of the adjustable power supply circuit, so that after the first test circuit is connected to the electric brake recorder, the adjustable power supply circuit outputs the analog signal voltage of the locomotive traction motor voltage sensor and the brake current sensor; The second test circuit is connected to the output end of the adjustable power supply circuit, so that after the second test circuit is connected to the fault excitation regulator, the fault excitation regulator outputs a linear loading current, the output end of the second test circuit is connected in series with an excitation ammeter, and the second test circuit is electrically connected to a digital display relay; The third test circuit includes a first relay and a second relay, and the first relay and the second relay are used to simulate two different electric pneumatic valve loads on the locomotive, so that after the third test circuit is connected to the electronic controller, the first relay and the second relay respectively receive the control signal output by the electronic controller, the first relay is electrically connected to the first display light, and the second relay is electrically connected to the second display light.

[0005] Optionally, the locomotive accessories testing device also includes a working power supply circuit, which includes a DC110V power supply module, the input end of the DC110V power supply module is connected in series with a first power switch, and the first power switch is connected in series with a main power supply, the output end of the DC110V power supply module is electrically connected to the first test circuit and the third test circuit respectively, and the output end of the DC110V power supply module is connected in parallel with a second DC voltmeter.

[0006] Optionally, the adjustable power supply circuit includes a DC0-30V power supply module and a voltage adjustment potentiometer, the input end of the DC0-30V power supply module is connected in series with a second power switch, and the second power switch is connected in series with the main power supply, and the voltage adjustment potentiometer is connected to the adjustment end of the DC0-30V power supply module.

[0007] Optionally, the first test circuit includes a recorder plug, and the recorder plug includes pins 1-10; Pin 1 of the recorder plug is connected to the positive pole of the output end of the DC110V power module, and pin 10 of the recorder plug is connected to the negative pole of the output end of the DC110V power module; Pin 3 of the recorder plug is a one-bit motor current sensor signal voltage input pin, Pin 4 of the recorder plug is a one-bit motor voltage sensor signal voltage input pin, Pin 5 of the recorder plug is a four-bit motor current sensor signal voltage input pin, Pin 6 of the recorder plug is a four-bit motor current sensor signal voltage input pin, Pin 3, Pin 4, Pin 5, and Pin 6 of the recorder plug are all connected to the positive pole of the output end of the DC0-30V power module; Pin No. 7 of the recorder plug is a common negative terminal for voltage signals and current signals, and pin No. 7 of the recorder plug is connected to the negative pole of the output terminal of the DC0-30V power module.

[0008] Optionally, the second test circuit includes a fault excitation test switch and a load resistor, the input end of the fault excitation test switch is connected to the positive pole of the output end of the DC0-30V power supply module, the fault excitation test switch is used to connect the control part of the fault excitation regulator, and the output end of the fault excitation test switch is connected in series with a current limiting resistor, and the signal input end of the digital display relay is electrically connected to the fault excitation test switch; The input end of the load resistor is connected to the positive pole of the output end of the DC0-30V power supply module, and the output end of the load resistor is used to connect the output part of the fault excitation regulator, and the excitation ammeter is connected in series with the output end of the load resistor.

[0009] Optionally, the power input terminal of the digital display relay is connected to the power line between the first power switch and the DC110V power module, and the second test circuit also includes a common negative line between the fault excitation regulator control part and the output part, and the common negative line is electrically connected to the negative pole of the DC0-30V power module.

[0010] Optionally, the third test circuit further includes a power plug, an electric-pneumatic valve plug and a compressor working switch, and the power plug and the electric-pneumatic valve plug are both used to connect to an electric controller; The power plug includes pins 1-5, pin 1 of the power plug is connected to the positive pole of the output end of the DC110V power module, pin 2 of the power plug is connected to the negative pole of the output end of the DC110V power module, pin 3 of the power plug is a working signal pin, and pin 3 of the power plug is connected to the output end of the compressor working switch, and the input end of the compressor working switch is connected to pin 1 of the power plug; The electro-pneumatic valve plug includes pins 1-4, pin 1 of the electro-pneumatic valve plug is a positive pin of the first electro-pneumatic valve, pin 2 of the electro-pneumatic valve plug is a negative pin of the first electro-pneumatic valve, the positive input end of the first relay is connected to pin 1 of the electro-pneumatic valve plug, and the negative input end of the first relay is connected to pin 2 of the electro-pneumatic valve plug, pin 3 of the electro-pneumatic valve plug is a positive pin of the second electro-pneumatic valve, pin 4 of the electro-pneumatic valve plug is a negative pin of the second electro-pneumatic valve, the positive input end of the second relay is connected to pin 3 of the electro-pneumatic valve plug, and the negative input end of the second relay is connected to pin 4 of the electro-pneumatic valve plug; The first relay is provided with a first normally open contact, which is connected in series with the first display light; the second relay is provided with a second normally open contact, which is connected in series with the second display light; the negative ends of the first display light and the second display light are respectively connected to pin No. 2 of the power plug; and the input ends of the first normally open contact and the second normally open contact are respectively connected to pin No. 1 of the power plug.

[0011] Optionally, the third test circuit also includes a third relay and a third display light, pin No. 4 of the power plug is a positive drain pin, pin No. 5 of the power plug is a negative drain pin, the positive input end of the third relay is connected to pin No. 4 of the electric air valve plug, and the negative input end of the third relay is connected to pin No. 5 of the electric air valve plug, the third relay is provided with a third normally open contact, the third normally open contact is connected in series with the third display light, the negative end of the third display light is connected to pin No. 2 of the power plug, and the input end of the third normally open contact is connected to pin No. 1 of the power plug.

[0012] Optionally, the third test circuit further includes a heating plug, a fourth relay and a fourth display light, and the heating plug is used to connect to the electric controller; The heating plug includes pins 1-5, pin 1 of the heating plug is the heating positive pin, pin 2 of the heating plug is the heating negative pin, the positive input end of the fourth relay is connected to pin 1 of the heating plug, and the negative input end of the fourth relay is connected to pin 2 of the heating plug, the fourth relay is provided with a fourth normally open contact, the fourth normally open contact is connected in series with the fourth display light, the negative end of the fourth display light is connected to pin 2 of the power plug, and the input end of the fourth normally open contact is connected to pin 1 of the power plug.

[0013] Optionally, the third test circuit also includes a temperature-controlled potentiometer and a temperature-controlled cut-off switch, pin 3 of the heating plug is a positive voltage pin, pin 4 of the heating plug is a negative voltage pin, pin 5 of the heating plug is a temperature signal pin, one of the fixed pins of the temperature-controlled potentiometer is connected to pin 3 of the heating plug, another fixed pin of the temperature-controlled potentiometer is connected to pin 4 of the heating plug, the rotating pin of the temperature-controlled potentiometer is connected to the input end of the temperature-controlled cut-off switch, and the output end of the temperature-controlled cut-off switch is connected to pin 5 of the heating plug.

[0014] Compared with the prior art, the locomotive parts testing device provided by the embodiment of the present invention has the following beneficial effects: For the electric brake recorder test part, after the electric brake recorder is connected with the first test circuit, the adjustable power supply circuit outputs the analog signal voltage of the locomotive traction motor voltage sensor and the brake current sensor, and after the analog signal voltage is increased from 0V to the upper limit value, the electromagnetic counter on the electric brake recorder reads the jump rate of the analog signal voltage increase process to determine whether the function of the electric brake recorder is normal. For the faulty excitation regulator, after the faulty excitation regulator is connected with the second test circuit, the adjustable power supply circuit provides working power for the faulty excitation regulator, and the power transistor inside the faulty excitation regulator controls the linear loading current to increase from 0A to the maximum value. The value read by the excitation current meter and the digital display relay determines whether the function of the faulty excitation regulator is normal. For the electric controller, the first relay and the second relay are used to simulate two different electric air valve loads on the locomotive. The output signal of the electric controller after operation will be sent to the first relay or the second relay. The relay is powered on to light up the corresponding display light. The lighting state of the first display light and the second display light can be used to determine whether the function of the electric controller is normal. Thus, by integrating the test circuits of three electrical accessories on railway locomotives, the long-standing problem of being unable to conduct complete tests on them is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which: Figure 1 A schematic block diagram of the circuit connection structure of a locomotive parts testing device provided by an embodiment of the present invention; Figure 2 A circuit schematic diagram of a first test circuit and a second test circuit provided in an embodiment of the present invention; Figure 3 A circuit schematic diagram of a third test circuit provided in an embodiment of the present invention.

[0016] The reference numerals in the figures are: 1. Adjustable power supply circuit; 11. First DC voltmeter; 12. DC0-30V power module; 13. Voltage adjustment potentiometer; 14. Second power switch; 2. First test circuit; 21. Recorder plug; 3. Second test circuit; 31. Excitation current meter; 32. Digital display relay; 33. Fault excitation test switch; 34. Load resistor; 35. Current limiting resistor; 4. Third test circuit; 41. First relay; 411. First normally open contact; 42. Second relay; 421. Second normally open Contact; 43. First display light; 44. Second display light; 45. Third relay; 451. Third normally open contact; 46. Third display light; 47. Fourth relay; 471. Fourth normally open contact; 48. Fourth display light; 49. Temperature control potentiometer; 491. Temperature control cut-off switch; 5. Working power supply circuit; 51. DC110V power supply module; 52. First power switch; 53. Second DC voltmeter; 6. Power plug; 7. Electric air valve plug; 8. Compressor working switch; 9. Heating plug. DETAILED DESCRIPTION

[0017] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, the preferred embodiments of the present invention are described in detail.

[0018] The present invention discloses a locomotive parts testing device, such as Figure 1-Figure 3 As shown, it includes an adjustable power supply circuit 1, a first test circuit 2, a second test circuit 3 and a third test circuit 4. The adjustable power supply circuit 1 is used to adjust the output voltage, and the output end of the adjustable power supply circuit 1 is connected in parallel with a first DC voltmeter 11. The first test circuit 2 is connected to the output end of the adjustable power supply circuit 1, so that after the first test circuit 2 is connected to the electric brake recorder, the adjustable power supply circuit 1 outputs the analog signal voltage of the locomotive traction motor voltage sensor and the brake current sensor. The second test circuit 3 is connected to the output end of the adjustable power supply circuit 1, so that after the second test circuit 3 is connected to the fault excitation regulator, the adjustable power supply circuit 1 outputs a linear loading current. The output end of the second test circuit 3 is connected in series with an excitation ammeter 31, and the second test circuit 3 is electrically connected to a digital display relay 32. The third test circuit 4 includes a first relay 41 and a second relay 42, and the first relay 41 and the second relay 42 are used to simulate two different electric pneumatic valve loads on the locomotive, so that after the third test circuit 4 is connected to the electric controller, the first relay 41 and the second relay 42 respectively receive the control signals output by the electric controller. The first relay 41 is electrically connected to a first indicator light 43 , and the second relay 42 is electrically connected to a second indicator light 44 .

[0019] Through the setting of the above locomotive accessories test device, the tests of three kinds of electrical accessories on railway locomotives are explained respectively; (1) For the electric brake recorder test part, the locomotive accessory test device needs to provide the working power required by the electric brake recorder, and the adjustable power supply circuit 1 simulates the signal voltage of the locomotive traction motor voltage sensor and the brake current sensor, so that the analog signal voltage is continuously adjustable within 0 to 10V, and the analog signal voltage can be displayed on the first DC voltmeter 11. When the first test circuit 2 is connected to the electric brake recorder for testing, the adjustable power supply circuit 1 is adjusted so that the analog signal voltage output is 0, and the electromagnetic counter on the panel of the electric brake recorder stops. As the analog signal voltage is gradually increased by adjustment, the electromagnetic counter jumps at a faster rate until the output analog signal voltage reaches the maximum value, which is preferably 10V. The electromagnetic counter jumps at a rate of about 20 times / second, that is, the count value increases by 20. Then the analog signal voltage is gradually reduced, and the electromagnetic counter jumps at a lower rate, and when the analog signal voltage drops to 0V, the electromagnetic counter stops jumping. Through this test, it can be checked whether the action of the electromagnetic counter is controlled, whether there is any input jump phenomenon, and whether the digital accumulation function is normal, thereby achieving the purpose of testing the electric brake recorder. By default, the electric brake recorder can be judged to be functioning normally if the following two conditions are met: the output analog signal voltage is 0V, and the electromagnetic counter does not beat within 5 minutes; or the output analog signal voltage gradually increases, and the electromagnetic counter beats faster, until the output analog signal voltage increases to 10V, and the electromagnetic counter beats at a rate of about 20 times / second. Otherwise, the electric brake recorder is judged to be faulty and relevant fault inspections must be performed.

[0020] (2) For the fault excitation regulator test part, the output voltage of the adjustable power supply circuit 1 is adjusted to 20V before the test, which can be calibrated by the first DC voltmeter 11. Then turn off the adjustable power supply circuit 1, connect the wiring with the fault excitation regulator according to the terminal, turn on the adjustable power supply circuit 1, and the adjustable power supply circuit 1 provides working power for the fault excitation regulator, and the power transistor inside the fault excitation regulator controls the linear loading current to increase from 0A to the maximum value. At the same time, the digital display relay 32 is triggered to start timing, and the performance of the regulator can be confirmed by observing the display of the excitation current meter 31. If the excitation current meter 31 displays a linear increase from 0A (without jumps and at a uniform speed) to the maximum value (20÷8=2.5A) after the test of the fault excitation regulator begins, and the time of this process is read by the digital display relay 32 as 3 to 5 seconds, the fault excitation regulator is judged to be qualified. If the linear loading current is always 0A or the time for the linear loading current to change from 0A to the maximum value is not within the range of 3 to 5 seconds, the fault excitation regulator needs to be adjusted or repaired.

[0021] (3) For the electric controller test part, the locomotive accessory test device needs to provide the electric controller with working power and compressor working signal, and the output signal of the electric controller after operation will be sent to the inside of the test bench. Since the nature of the relay and the electric pneumatic valve load are similar, the first relay 41 and the second relay 42 are used to simulate two different electric pneumatic valve loads on the locomotive, which can ensure the reliability of the test. When the electric controller determines that the compressor starts to work, it outputs a working control signal to drive the first relay 41 or the second relay 42 to attract, and the first relay 41 or the second relay 42 attracts and connects to the power to light up the corresponding first display light 43 or the second display light 44. If the first display light 43 or the second display light 44 lights up alternately, and the light switching process is staggered in time, it can be judged that the switching function of the electric controller is normal. If any of the following phenomena occurs: the first display light 43 and the second display light 44 are on at the same time, the first display light 43 and the second display light 44 are not on at all, or only one display light is on and off alternately, it is judged that there is a fault in the electric controller and corresponding processing is required.

[0022] Therefore, the first test circuit 2, the second test circuit 3 and the third test circuit 4 are simple in design, low in manufacturing cost, easy to operate and use, and the test results are clear and understandable. The functional tests of the three major types of locomotive accessories, namely, electric brake recorder, fault excitation regulator and electronic controller, are scientifically and effectively realized. By integrating the test circuits of the three electrical accessories on the railway locomotive, the problem of being unable to conduct a complete test on them for a long time is effectively solved.

[0023] Furthermore, the locomotive accessory test device also includes a working power supply circuit 5, which includes a DC110V power supply module. The input end of the DC110V power supply module is connected in series with a first power switch 52, and the first power switch 52 is connected in series with the main power supply, the output end of the DC110V power supply module is electrically connected to the first test circuit 2 and the third test circuit 4 respectively, and the output end of the DC110V power supply module is connected in parallel with a second DC voltmeter 53.

[0024] Through the setting of the above locomotive accessories test device, the DC110V power module is used as a high-power module power supply. Through the setting of the first power switch 52, the DC110V power module can be controlled to provide or disconnect the common 110V working power supply for the first test circuit 2 and the third test circuit 4 without turning off the main power supply, and the output voltage of the DC110V power module is directly monitored by the second DC voltmeter 53, ensuring the stability and accuracy of the power supply voltage during the test process, so as to provide a stable and consistent voltage, which helps to ensure the accuracy and reliability of the test results. At the same time, the number of power modules can be reduced, reducing equipment costs and space requirements.

[0025] Furthermore, the adjustable power supply circuit 1 includes a DC0-30V power supply module and a voltage adjustment potentiometer 13. The input end of the DC0-30V power supply module is connected in series with a second power switch 14, and the second power switch 14 is connected in series with the main power supply, and the voltage adjustment potentiometer 13 is connected to the adjustment end of the DC0-30V power supply module.

[0026] Through the setting of the above locomotive accessory test device, using the setting of the DC0-30V power supply module and the voltage adjustment potentiometer 13, the output voltage of the DC0-30V power supply module can be adjusted between 0V and 30V through the voltage adjustment potentiometer 13, so as to provide flexible voltage selection for different types of tests. For example, for the electric brake recorder test part, the DC0-30V power supply module simulates the signal voltage of the locomotive traction motor voltage sensor and the brake current sensor, and makes the simulated signal voltage continuously adjustable within 0 to 10V; for the fault excitation regulator test part, before the test, the output voltage of the DC0-30V power supply module is adjusted to 20V, and then the adjustable power supply circuit 1 is turned off, and after the wiring terminals are connected to the fault excitation regulator, the adjustable power supply circuit 1 is turned on, and the DC0-30V power supply module provides working power for the fault excitation regulator. In addition, by setting the second power switch 14, the power output of the DC0-30V power module can be controlled without turning off the main power supply, and the output voltage of the DC0-30V power module can be directly monitored using the first DC voltmeter 11 to ensure the stability and accuracy of the power supply voltage during the test.

[0027] Further, the first test circuit 2 includes a recorder plug 21. The recorder plug 21 includes pins 1-10. Pin 1 of the recorder plug 21 is connected to the positive pole of the DC110V power module output terminal, and pin 10 of the recorder plug 21 is connected to the negative pole of the DC110V power module output terminal. Pin 3 of the recorder plug 21 is a one-bit motor current sensor signal voltage input pin, pin 4 of the recorder plug 21 is a one-bit motor voltage sensor signal voltage input pin, pin 5 of the recorder plug 21 is a four-bit motor current sensor signal voltage input pin, and pin 6 of the recorder plug 21 is a four-bit motor current sensor signal voltage input pin. Pins 3, 4, 5, and 6 of the recorder plug 21 are all connected to the positive pole of the DC0-30V power module output terminal. Pin 7 of the recorder plug 21 is a common negative terminal for the voltage signal and the current signal, and pin 7 of the recorder plug 21 is connected to the negative pole of the DC0-30V power module output terminal.

[0028] Through the setting of the above locomotive accessories test device, the recorder plug 21 is preferably a TL02K10TY type quick plug. And by using the above wiring method, the signal voltage of the four sensors can be replaced by an analog voltage, which reduces the complexity of the circuit, simplifies signal processing and transmission, and makes the analog signal voltage continuously adjustable within 0-10V, and the analog signal voltage can be displayed on the first DC voltmeter 11, providing greater flexibility for testing and simulation. At the beginning of the test, first adjust the voltage adjustment potentiometer 13 so that the analog signal voltage output by the DC0-30V power module is 0, and gradually increase the analog signal voltage with the adjustment until the output analog signal voltage reaches the maximum value, that is, the maximum value is 10V. In order to facilitate the fault test of the electric brake recorder.

[0029] Furthermore, the second test circuit 3 includes a fault excitation test switch 33 and a load resistor 34. The input end of the fault excitation test switch 33 is connected to the positive pole of the output end of the DC0-30V power module, the fault excitation test switch 33 is used to connect the control part of the fault excitation regulator, and the output end of the fault excitation test switch 33 is connected in series with a current limiting resistor 35, and the signal input end of the digital display relay 32 is electrically connected to the fault excitation test switch 33. The input end of the load resistor 34 is connected to the positive pole of the output end of the DC0-30V power module, and the output end of the load resistor 34 is used to connect the output part of the fault excitation regulator, and the excitation ammeter 31 is connected in series with the output end of the load resistor 34.

[0030] Furthermore, the power input terminal of the digital display relay 32 is connected to the power line between the first power switch 52 and the DC110V power module, and the second test circuit 3 also includes a common negative line of the fault excitation regulator control part and the output part, and the common negative line is electrically connected to the negative pole of the DC0-30V power module.

[0031] Through the setting of the above locomotive accessories test device, the common negative line is connected to the 63A line of the fault excitation regulator, which is the common negative line of the internal control circuit and output part of the fault excitation regulator. Before the test, adjust the voltage adjustment potentiometer 13 so that the supply voltage of the DC0-30V power module is 20V, which is displayed by the first DC voltmeter 11. Then turn off the main power supply and the second power switch 14. After connecting the wires according to the wiring terminal line number, turn on the main power supply and the second power switch 14, and finally close the fault excitation test switch 33. The current limiting resistor 35 is connected to the 69th line of the fault excitation regulator, so that the DC power output by the DC0-30V power module is sent from the 69th line to the control circuit part inside the fault excitation regulator through the current limiting resistor 35, which is equivalent to the fault excitation regulator receiving the loading signal. The current limiting resistor 35 is preferably 100Ω / 200W, which is used for current limiting of the power circuit of the control part of the fault excitation regulator to avoid burning.

[0032] The excitation ammeter 31 is connected to line 79 of the fault excitation regulator, which is the output part of the fault excitation regulator. When the fault excitation regulator receives the loading signal, it outputs a linear loading current through line 79. This linear loading current is the excitation current output by the fault excitation regulator. The specific current path is: DC0-30V power module output, through 8Ω / 60W load resistor 34, and then flows through the excitation ammeter 31, and enters the fault excitation regulator from line 79. The change of the current flowing through the load resistor 34 is controlled by the on-resistance of the power transistor inside the fault excitation regulator. The on-resistance change trend of the power transistor is: blocking → minimum, thereby controlling the linear loading current in the circuit to increase from 0A to the maximum value. When the fault excitation test switch 33 is closed, the digital display relay 32 is triggered to start timing. The performance of the regulator can be confirmed by observing the display of the excitation ammeter 31. For example, after the fault excitation test switch 33 is closed, the display value of the excitation ammeter 31 increases linearly (without jumps and at a uniform speed) from 0A to the maximum value (20÷8=2.5A), and the time read by the digital display relay 32 for this process is 3 to 5 seconds, and the fault excitation regulator is judged to be qualified. If the linear loading current is always 0A or the time for the linear loading current to change from 0A to the maximum value is not within the range of 3 to 5 seconds, the fault excitation regulator needs to be adjusted or repaired.

[0033] As mentioned above, since the current required by the digital display relay 32 is small, connecting the power input end of the digital display relay 32 to the power line between the first power switch 52 and the DC110V power module can avoid the digital display relay 32 being unable to work normally or even overloaded due to being directly connected to the DC110V power module.

[0034] Further, the third test circuit 4 also includes a power plug 6, an electro-pneumatic valve plug 7 and a compressor working switch 8, and the power plug 6 and the electro-pneumatic valve plug 7 are both used to connect the electric controller. The power plug 6 includes pins 1-5. Pin 1 of the power plug 6 is connected to the positive pole of the output end of the DC110V power module, pin 2 of the power plug 6 is connected to the negative pole of the output end of the DC110V power module, pin 3 of the power plug 6 is a working signal pin, and pin 3 of the power plug 6 is connected to the output end of the compressor working switch 8. The input end of the compressor working switch 8 is connected to pin 1 of the power plug 6. The electro-pneumatic valve plug 7 includes pins 1-4, pin 1 of the electro-pneumatic valve plug 7 is a positive pin of the electro-pneumatic valve, pin 2 of the electro-pneumatic valve plug 7 is a negative pin of the electro-pneumatic valve, the positive input end of the first relay 41 is connected to pin 1 of the electro-pneumatic valve plug 7, and the negative input end of the first relay 41 is connected to pin 2 of the electro-pneumatic valve plug 7. Pin No. 3 of the electric-pneumatic valve plug 7 is the positive pin of the second-tower electric-pneumatic valve, and pin No. 4 of the electric-pneumatic valve plug 7 is the negative pin of the second-tower electric-pneumatic valve. The positive input end of the second relay 42 is connected to pin No. 3 of the electric-pneumatic valve plug 7, and the negative input end of the second relay 42 is connected to pin No. 4 of the electric-pneumatic valve plug 7. The first relay 41 is provided with a first normally open contact 411, and the first normally open contact 411 is connected in series with the first display light 43. The second relay 42 is provided with a second normally open contact 421, and the second normally open contact 421 is connected in series with the second display light 44. The negative ends of the first display light 43 and the second display light 44 are respectively connected to pin No. 2 of the power plug 6, and the input ends of the first normally open contact 411 and the second normally open contact 421 are respectively connected to pin No. 1 of the power plug 6.

[0035] Through the setting of the above locomotive accessories test device, the DC110V power supply module provides working power to the electric controller, and the compressor working switch 8 provides the compressor working signal. When the compressor working switch 8 is closed and the provided compressor working signal is 110V+, it is input to the No. 3 pin of the electric air valve plug 7. At this time, the electric controller determines that the compressor starts to work, and outputs the working control signal of the first tower electric air valve or the second tower electric air valve to the electric air valve plug 7, and drives the first relay 41 or the second relay 42 to pull in. The first relay 41 or the second relay 42 is pulled in and connected to the power to close the corresponding first normally open contact 411 or the second normally open contact 421, thereby lighting the corresponding first display light 43 or the second display light 44. If the two display lights are lit alternately, and the light conversion process is staggered in time, it can be judged that the conversion function of the electric controller is normal; if the two display lights are lit at the same time, never lit, and only one is lit and extinguished alternately, it is judged that there is a fault in the electric controller and corresponding processing is required.

[0036] Further, the third test circuit 4 also includes a third relay 45 and a third display light 46. Pin No. 4 of the power plug 6 is a positive pin for sewage discharge, and Pin No. 5 of the power plug 6 is a negative pin for sewage discharge. The positive input terminal of the third relay 45 is connected to Pin No. 4 of the electric air valve plug 7, and the negative input terminal of the third relay 45 is connected to Pin No. 5 of the electric air valve plug 7. The third relay 45 is provided with a third normally open contact 451, and the third normally open contact 451 is connected in series with the third display light 46. The negative terminal of the third display light 46 is connected to Pin No. 2 of the power plug 6, and the input terminal of the third normally open contact 451 is connected to Pin No. 1 of the power plug 6.

[0037] Through the setting of the above locomotive accessories test device, the compressor working switch 8 is turned off to cut off the provided compressor working signal. At this time, the electronic controller sends out a sewage discharge signal for 1 second, and sends it in through pins 4 and 5 of the power plug 6, driving the third relay 45 to attract, and the third relay 45 attracts and connects electricity to close the corresponding third normally open contact 451, thereby lighting up the corresponding third display light 46. That is, the third display light 46 lights up for 1 second and then goes out. If the third display light 46 does not light up for 1 second or stays on when the compressor working signal is cut off, it is judged that the "sewage discharge" control function fails.

[0038] Further, the third test circuit 4 also includes a heating plug 9, a fourth relay 47 and a fourth display light 48, and the heating plug 9 is used to connect the electric controller. The heating plug 9 includes pins 1-5, the pin 1 of the heating plug 9 is the heating positive pin, the pin 2 of the heating plug 9 is the heating negative pin, the input end of the fourth relay 47 is connected to the pin 1 of the heating plug 9, and the output end of the fourth relay 47 is connected to the pin 2 of the heating plug 9. The fourth relay 47 is provided with a fourth normally open contact 471, and the fourth normally open contact 471 is connected in series with the fourth display light 48. The negative end of the fourth display light 48 is connected to the pin 2 of the power plug 6, and the input end of the fourth normally open contact 471 is connected to the pin 1 of the power plug 6.

[0039] Further, the third test circuit 4 also includes a temperature control potentiometer 49 and a temperature control cut-off switch 491. Pin No. 3 of the heating plug 9 is a voltage positive pin, Pin No. 4 of the heating plug 9 is a voltage negative pin, Pin No. 5 of the heating plug 9 is a temperature signal pin, one of the fixed pins of the temperature control potentiometer 49 is connected to Pin No. 3 of the heating plug 9, another fixed pin of the temperature control potentiometer 49 is connected to Pin No. 4 of the heating plug 9, the rotating pin of the temperature control potentiometer 49 is connected to the input end of the temperature control cut-off switch 491, and the output end of the temperature control cut-off switch 491 is connected to Pin No. 5 of the heating plug 9.

[0040] Through the setting of the above locomotive accessories test device, for the automatic heating control part, by adjusting the temperature control potentiometer 49, the change of the ambient temperature sensor signal voltage can be simulated to realize the manual control of the heating function and stop, so as to judge whether the heating function of the electric controller is normal. Pin 3 of the heating plug 9 is the 5V+ pin, pin 4 of the heating plug 9 is the 5V- pin, and pin 5 of the heating plug 9 is the temperature signal pin. When the temperature control cut-off switch 491 is set to the effective position (upward), the temperature signal is cut off, which is equivalent to the temperature signal input to the electric controller being 0, corresponding to the ambient temperature of 0°C, which is lower than the critical temperature (5°C) of the heating function of the electric controller. The electric controller outputs the heating control signal to the inside of the third test circuit 4 through pin 1 (110V+) of the heating plug 9 and pin 2 (110V-) of the heating plug 9, and drives the fourth relay 47 to pull in. The fourth relay 47 pulls in and connects electricity to close the corresponding fourth normally open contact 471, thereby lighting the corresponding fourth display light 48. When the temperature control cut-off switch 491 is set to the effective position (downward), the temperature control potentiometer 49 is adjusted to increase the temperature signal voltage, that is, greater than 50mV, and a multimeter can be used to measure between the 5th pin (signal +) and the 4th pin (signal -) of the heating plug 9. When the corresponding ambient temperature is higher than 5°C, the electric controller automatically turns off the heating function. At this time, the fourth relay 47 is released and the fourth display light 48 is off.

[0041] Preferably, the locomotive parts testing device also includes a test bench, and the adjustable power supply circuit 1, the first test circuit 2, the second test circuit 3 and the third test circuit 4 are all integrated inside the test bench, and each DC voltmeter, the excitation ammeter 31, each display light and each switch are all arranged on the control panel of the test bench and arranged in partitions.

[0042] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A locomotive parts testing device, characterized in that: The locomotive parts testing device comprises an adjustable power supply circuit, a first testing circuit, a second testing circuit and a third testing circuit; The adjustable power supply circuit is used to adjust the output voltage, and the output end of the adjustable power supply circuit is connected in parallel with a first DC voltmeter; The first test circuit is connected to the output end of the adjustable power supply circuit, so that after the first test circuit is connected to the electric brake recorder, the adjustable power supply circuit outputs the analog signal voltage of the locomotive traction motor voltage sensor and the brake current sensor; The second test circuit is connected to the output end of the adjustable power supply circuit, so that after the second test circuit is connected to the fault excitation regulator, the fault excitation regulator outputs a linear loading current, the output end of the second test circuit is connected in series with an excitation ammeter, and the second test circuit is electrically connected to a digital display relay; The third test circuit includes a first relay and a second relay, and the first relay and the second relay are used to simulate two different electric pneumatic valve loads on the locomotive, so that after the third test circuit is connected to the electronic controller, the first relay and the second relay respectively receive the control signal output by the electronic controller, the first relay is electrically connected to the first display light, and the second relay is electrically connected to the second display light.

2. The locomotive parts testing device according to claim 1, characterized in that: The locomotive accessories testing device also includes a working power supply circuit, which includes a DC110V power supply module. The input end of the DC110V power supply module is connected in series with a first power switch, and the first power switch is connected in series with a main power supply. The output end of the DC110V power supply module is electrically connected to the first test circuit and the third test circuit respectively, and the output end of the DC110V power supply module is connected in parallel with a second DC voltmeter.

3. The locomotive parts testing device according to claim 2, characterized in that: The adjustable power supply circuit includes a DC0-30V power supply module and a voltage adjustment potentiometer. The input end of the DC0-30V power supply module is connected in series with a second power switch, and the second power switch is connected in series with the main power supply. The voltage adjustment potentiometer is connected to the adjustment end of the DC0-30V power supply module.

4. The motorcycle parts testing device according to claim 3, characterized in that: The first test circuit includes a recorder plug, and the recorder plug includes pins 1-10; Pin 1 of the recorder plug is connected to the positive pole of the output end of the DC110V power module, and pin 10 of the recorder plug is connected to the negative pole of the output end of the DC110V power module; Pin 3 of the recorder plug is a one-bit motor current sensor signal voltage input pin, Pin 4 of the recorder plug is a one-bit motor voltage sensor signal voltage input pin, Pin 5 of the recorder plug is a four-bit motor current sensor signal voltage input pin, Pin 6 of the recorder plug is a four-bit motor current sensor signal voltage input pin, Pin 3, Pin 4, Pin 5, and Pin 6 of the recorder plug are all connected to the positive pole of the output end of the DC0-30V power module; Pin No. 7 of the recorder plug is a common negative terminal for voltage signals and current signals, and pin No. 7 of the recorder plug is connected to the negative pole of the output terminal of the DC0-30V power module.

5. The motorcycle parts testing device according to claim 3, characterized in that: The second test circuit comprises a fault excitation test switch and a load resistor, the input end of the fault excitation test switch is connected to the positive pole of the output end of the DC0-30V power supply module, the fault excitation test switch is used to connect the control part of the fault excitation regulator, and the output end of the fault excitation test switch is connected in series with a current limiting resistor, and the signal input end of the digital display relay is electrically connected to the fault excitation test switch; The input end of the load resistor is connected to the positive pole of the output end of the DC0-30V power supply module, and the output end of the load resistor is used to connect the output part of the fault excitation regulator, and the excitation ammeter is connected in series with the output end of the load resistor.

6. The motorcycle parts testing device according to claim 5, characterized in that: The power input end of the digital display relay is connected to the power line between the first power switch and the DC110V power module. The second test circuit also includes a common negative line between the fault excitation regulator control part and the output part, and the common negative line is electrically connected to the negative pole of the DC0-30V power module.

7. The motorcycle parts testing device according to claim 2, characterized in that: The third test circuit also includes a power plug, an electric air valve plug and a compressor working switch, and the power plug and the electric air valve plug are both used to connect to the electric controller; The power plug includes pins 1-5, pin 1 of the power plug is connected to the positive pole of the output end of the DC110V power module, pin 2 of the power plug is connected to the negative pole of the output end of the DC110V power module, pin 3 of the power plug is a working signal pin, and pin 3 of the power plug is connected to the output end of the compressor working switch, and the input end of the compressor working switch is connected to pin 1 of the power plug; The electro-pneumatic valve plug includes pins 1-4, pin 1 of the electro-pneumatic valve plug is a positive pin of the first electro-pneumatic valve, pin 2 of the electro-pneumatic valve plug is a negative pin of the first electro-pneumatic valve, the positive input end of the first relay is connected to pin 1 of the electro-pneumatic valve plug, and the negative input end of the first relay is connected to pin 2 of the electro-pneumatic valve plug, pin 3 of the electro-pneumatic valve plug is a positive pin of the second electro-pneumatic valve, pin 4 of the electro-pneumatic valve plug is a negative pin of the second electro-pneumatic valve, the positive input end of the second relay is connected to pin 3 of the electro-pneumatic valve plug, and the negative input end of the second relay is connected to pin 4 of the electro-pneumatic valve plug; The first relay is provided with a first normally open contact, which is connected in series with the first display light; the second relay is provided with a second normally open contact, which is connected in series with the second display light; the negative ends of the first display light and the second display light are respectively connected to pin No. 2 of the power plug; and the input ends of the first normally open contact and the second normally open contact are respectively connected to pin No. 1 of the power plug.

8. The motorcycle parts testing device according to claim 7, characterized in that: The third test circuit also includes a third relay and a third display light. Pin No. 4 of the power plug is a positive drain pin, and Pin No. 5 of the power plug is a negative drain pin. The positive input end of the third relay is connected to Pin No. 4 of the electric air valve plug, and the negative input end of the third relay is connected to Pin No. 5 of the electric air valve plug. The third relay is provided with a third normally open contact, and the third normally open contact is connected in series with the third display light. The negative end of the third display light is connected to Pin No. 2 of the power plug, and the input end of the third normally open contact is connected to Pin No. 1 of the power plug.

9. The motorcycle parts testing device according to claim 7, characterized in that: The third test circuit also includes a heating plug, a fourth relay and a fourth display light, wherein the heating plug is used to connect to the electric controller; The heating plug includes pins 1-5, pin 1 of the heating plug is the heating positive pin, pin 2 of the heating plug is the heating negative pin, the positive input end of the fourth relay is connected to pin 1 of the heating plug, and the negative input end of the fourth relay is connected to pin 2 of the heating plug, the fourth relay is provided with a fourth normally open contact, the fourth normally open contact is connected in series with the fourth display light, the negative end of the fourth display light is connected to pin 2 of the power plug, and the input end of the fourth normally open contact is connected to pin 1 of the power plug.

10. The motorcycle parts testing device according to claim 9, characterized in that: The third test circuit also includes a temperature-controlled potentiometer and a temperature-controlled cut-off switch, pin No. 3 of the heating plug is a positive voltage pin, pin No. 4 of the heating plug is a negative voltage pin, pin No. 5 of the heating plug is a temperature signal pin, one of the fixed pins of the temperature-controlled potentiometer is connected to pin No. 3 of the heating plug, the other fixed pin of the temperature-controlled potentiometer is connected to pin No. 4 of the heating plug, the rotating pin of the temperature-controlled potentiometer is connected to the input end of the temperature-controlled cut-off switch, and the output end of the temperature-controlled cut-off switch is connected to pin No. 5 of the heating plug.

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