Detection device for air pressure brake system of self-propelled mixing iron car

Abstract

The application discloses a detection device for a wind pressure brake system of a self-propelled iron mixing vehicle, wherein a vehicle-mounted air compressor driving control unit of the device adopts an air switch, a thermal relay, a relay, a pressure switch, a normally closed stop button and a normally open start button to drive and control the vehicle-mounted air compressor to perform operation detection; an element detection unit adopts a power switch, an AC / DC power supply, an adjustable AC / DC power supply, a first test switch, a second test switch, an electromagnetic valve connector and a proportional valve connector to detect electromagnetic valves and proportional valves in the system; and a wind pressure brake detection unit adopts an air cylinder, a pressure regulating valve, an air flow detector, an air pressure sensor and a plurality of hand-controlled two-position three-way valves to detect the vehicle-mounted air compressor and unit brakes respectively. The device realizes overall function detection and segmented item-by-item detection of the wind pressure brake system, improves fault judgment accuracy and maintenance efficiency, and can perform independent offline detection and on-site online fault repair processing without the power unit of the original equipment.

Description

Technical Field

[0001] This invention relates to the field of metallurgical equipment technology, and in particular to a testing device for the air pressure braking system of a self-propelled mixed-rail vehicle. Background Technology

[0002] With the application and development of smart manufacturing and smart logistics technologies, and the increasing demand for higher labor efficiency, the original locomotive-traction hybrid railcars are being converted into self-propelled vehicles. A new type of self-propelled electric drive running gear replaces the original traditional hybrid railcar running gear, which is a newly developed type of automated intelligent transportation equipment.

[0003] Traditional molten iron cars lack a separate service braking system and have no braking capability. Braking is passively achieved by the locomotive's traction and braking actions, resulting in a stop. To address this, a pneumatic braking system is installed on self-propelled molten iron cars, enabling active braking. This pneumatic braking system is a core and crucial component for the safe operation of new self-propelled electric molten iron cars. Therefore, a suitable detection device is essential for inspecting and troubleshooting the airflow path of this braking system, allowing for rapid fault diagnosis and ensuring smooth molten iron flow. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a testing device for the wind pressure braking system of a self-propelled hybrid train. This device realizes the overall functional testing of the wind pressure braking system as well as segmented item-by-item testing, improves the accuracy of fault diagnosis and maintenance efficiency, and can be separated from the original equipment's power unit for independent offline testing and on-site online fault repair.

[0005] To solve the above-mentioned technical problems, the present invention provides a detection device for the wind pressure braking system of a self-propelled mixed-rail vehicle, which includes an on-board air compressor drive control unit, a component detection unit, and a wind pressure braking detection unit.

[0006] The vehicle-mounted air compressor drive control unit includes an air switch, a thermal relay, a relay, a pressure switch, a normally closed stop button, and a normally open start button. The upper end of the air switch is connected to an external power supply, and the lower end is connected in sequence to the thermal relay contact, the relay contact, and the air compressor motor. The thermal relay coil, the normally closed stop button, the normally open start button, the pressure switch, and the relay coil are connected in series to the external control power supply.

[0007] The component detection unit includes a power switch, an AC / DC power supply, an adjustable AC / DC power supply, a first test switch, a second test switch, a solenoid valve connector, and a proportional valve connector. The upper end of the power switch is connected to an external control power supply, and the lower end is connected to the input terminals of the AC / DC power supply and the adjustable AC / DC power supply, respectively. The output terminal of the AC / DC power supply is connected to the solenoid valve connector via the first test switch, and the output terminal of the adjustable AC / DC power supply is connected to the proportional valve connector via the second test switch.

[0008] The wind pressure braking detection unit includes a shuttle valve, a first shut-off valve, a check valve, an air tank, a second shut-off valve, a pressure regulating valve, a first pressure gauge, an air flow meter, an air pressure sensor, and several manually controlled two-position three-way valves. The input end of the shuttle valve is connected to a vehicle-mounted air compressor or an external air source, and the output end is connected to the input end of the air tank via the first shut-off valve and the check valve. The output end of the air tank is connected to the input end of the pressure regulating valve via the second shut-off valve. The output end of the pressure regulating valve is connected to the input ends of several manually controlled two-position three-way valves via the air flow meter. The first pressure gauge and the air pressure sensor are respectively located at the input end and the output end of the air flow meter.

[0009] Furthermore, the external power supply is a three-phase 380V power supply, and the external control power supply is a single-phase 220V power supply connected to the external power supply.

[0010] Furthermore, the AC / DC power supply is a 220V AC to 24V DC power supply, and the adjustable AC / DC power supply is a voltage-adjustable 220V AC to 24V DC power supply.

[0011] Furthermore, the air storage tank of the wind pressure braking detection unit is equipped with a drain outlet, a safety valve, and a second pressure gauge.

[0012] Because the present invention employs the aforementioned technical solution in the testing device for the pneumatic braking system of a self-propelled hybrid train, the device comprises an on-board air compressor drive control unit, a component testing unit, and a pneumatic braking testing unit for the pneumatic braking system. The on-board air compressor drive control unit uses an air switch, thermal relay, relay, pressure switch, normally closed stop button, and normally open start button to drive and control the on-board air compressor for operational testing. The component testing unit uses a power switch, AC / DC power supply, adjustable AC / DC power supply, a first test switch, a second test switch, a solenoid valve connector, and a proportional valve connector to test the solenoid valves and proportional valves in the system. The pneumatic braking testing unit uses an air tank, pressure regulating valve, air flow meter, air pressure sensor, and several manually controlled two-position three-way valves to test the on-board air compressor and unit brakes respectively. This device achieves overall functional testing and segmented item-by-item testing of the pneumatic braking system, improving the accuracy of fault diagnosis and maintenance efficiency. It can be used independently of the original equipment's power unit for offline testing and on-site online fault repair. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0014] Figure 1 This is a schematic diagram of the vehicle-mounted air compressor drive control unit in this testing device;

[0015] Figure 2 This is a schematic diagram of the component detection unit in this detection device;

[0016] Figure 3 This is a schematic diagram of the wind pressure braking detection unit in this testing device;

[0017] Figure 4 This is a schematic diagram of the electrical control and testing section of this testing device;

[0018] Figure 5 This is a block diagram illustrating the principle of the wind pressure braking detection section of this testing device. Detailed Implementation

[0019] Implementation, for example Figure 1 , Figure 2 and Figure 3 As shown, the detection device for the wind pressure braking system of a self-propelled mixed-rail vehicle of the present invention includes an on-board air compressor drive control unit 1, a component detection unit 2, and a wind pressure braking detection unit 3 for the wind pressure braking system.

[0020] The vehicle-mounted air compressor drive control unit 1 includes an air switch 11, a thermal relay 12, a relay 13, a pressure switch 14, a normally closed stop button 15, and a normally open start button 16. The upper end of the air switch 11 is connected to an external power supply, and the lower end is connected in sequence to the contact 121 of the thermal relay 12, the contact 131 of the relay 13, and the air compressor motor M. The coil of the thermal relay 12, the normally closed stop button 15, the normally open start button 16, the pressure switch 14, and the coil of the relay 13 are connected in series to the external control power supply.

[0021] The component detection unit 2 includes a power switch 21, an AC / DC power supply 22, an adjustable AC / DC power supply 23, a first test switch 24, a second test switch 25, a solenoid valve connector 26, and a proportional valve connector 27. The upper end of the power switch 21 is connected to an external control power supply, and the lower end is connected to the input terminals of the AC / DC power supply 22 and the adjustable AC / DC power supply 23, respectively. The output terminal of the AC / DC power supply 22 is connected to the solenoid valve connector 26 via the first test switch 24, and the output terminal of the adjustable AC / DC power supply 23 is connected to the proportional valve connector 27 via the second test switch 25.

[0022] The wind pressure braking detection unit 3 includes a shuttle valve 31, a first shut-off valve 32, a one-way valve 33, an air tank 34, a second shut-off valve 35, a pressure regulating valve 36, a first pressure gauge 37, an air flow meter 38, an air pressure sensor 39, and several manually controlled two-position three-way valves 40. The input end of the shuttle valve 31 is connected to the vehicle-mounted air compressor A or an external air source B, and the output end is connected to the input end of the air tank 34 via the first shut-off valve 32 and the one-way valve 33. The output end of the air tank 34 is connected to the input end of the pressure regulating valve 36 via the second shut-off valve 35. The output end of the pressure regulating valve 36 is connected to the input ends of several manually controlled two-position three-way valves 40 via the air flow meter 38. The first pressure gauge 37 and the air pressure sensor 39 are respectively located at the input end and the output end of the air flow meter 38.

[0023] Preferably, the external power supply is a three-phase 380V power supply, and the external control power supply is a single-phase 220V power supply connected to the external power supply.

[0024] Preferably, the AC / DC power supply 22 is an AC 220V to DC 24V power supply, and the adjustable AC / DC power supply 23 is an AC 220V to DC 24V power supply with adjustable voltage.

[0025] Preferably, the air storage tank 34 of the wind pressure braking detection unit 3 is equipped with a drain outlet 341, a safety valve 342, and a second pressure gauge 343. The drain outlet, safety valve, and second pressure gauge are used to ensure the safety of the air storage tank during the operation of the device and to avoid safety accidents.

[0026] like Figure 4 As shown, this device can independently control the air compressor during offline performance testing without relying on the original vehicle's electrical drive control system. It utilizes the device's on-board air compressor drive control unit to independently drive the air compressor, enabling it to operate, stop, and implement pressure feedback and thermal protection shutdown according to the test intent. When connected to an external 380V power supply, the on-board air compressor drive control unit drives the air compressor motor. When the air compressor's charging pressure reaches the pressure switch's set value of 0.8 MPa, the normally closed contact of the pressure switch opens, the relay coil is de-energized, and the air compressor motor stops running, achieving pressure feedback protection. When the air compressor motor's operating temperature reaches the thermal relay's set value of 105°C, the thermal relay contacts open, and the air compressor motor stops running, achieving overheat protection.

[0027] The component detection unit of this device can be used to determine the working performance of solenoid valves and proportional valves in the wind pressure braking system. When connected to an external control power supply of 220V, the current reaches the AC / DC power supply through the power switch. When the first test switch (normally open) is pressed, the output current of the AC / DC power supply is transmitted to the solenoid valve electrical component under test through the solenoid valve connector, thereby realizing the determination of the working performance of the solenoid valve.

[0028] To determine the performance of a proportional valve, connect an external 220V control power supply. The current passes through the power switch to the adjustable AC / DC power supply. Press the second test switch (normally open), and the adjustable power supply is transmitted to the electrical components of the proportional valve under test through the proportional valve connector to determine the performance of the proportional valve.

[0029] like Figure 5 As shown, during the air compressor performance test, the air pressure braking test unit of this device is connected to the air supply port of the vehicle-mounted air compressor. At the same time, the air compressor motor drive control part is connected to the vehicle-mounted air compressor drive control unit of this device and controls the vehicle-mounted air compressor motor to run. The air compressor starts to supply air to the air pressure braking test unit. The compressed air passes through the shuttle valve, the first shut-off valve, and the check valve to the air tank. The compressed air output from the air tank reaches the second shut-off valve, the pressure regulating valve, the first pressure gauge, the air flow meter, and the air pressure sensor. The air supply performance of the vehicle-mounted air compressor is judged by the pressure gauge, the air flow meter, and the air pressure sensor. The pressure regulating valve is set to 0.8 MPa. The pressure value of the first pressure gauge should reach 0.8 MPa within 20 seconds. At the same time, compressed air passes through the air flow detector to the air pressure sensor (set to 0.8 MPa). At this time, the pressure switch of the vehicle air compressor drive control unit will activate, cutting off the air compressor drive circuit and stopping the air compressor. At this time, the air compressor's air supply performance is considered normal. If the air compressor runs for more than 20 seconds and the pressure value cannot reach 0.8 MPa, and the pressure no longer rises, the air compressor's air supply performance is considered poor.

[0030] When testing the parking unit brake of the wind pressure braking system, an external air source or a vehicle-mounted air compressor is connected to the shuttle valve (an external air source is used when available, and a vehicle-mounted air compressor can also be used to supply air to the wind pressure brake testing unit when no external air source is available). Compressed air passes through the shuttle valve, the first shut-off valve, and the check valve to the air tank. The output of the air tank passes through the second shut-off valve, the pressure regulating valve (set value 0.8 MPa), the air flow meter, and the manual two-position three-way valve to the parking unit brake to test the braking performance of the parking unit brake. The pressure regulating valve is set to 0.8 MPa (simulating the forced driving mode of a mixed-rail car). An air flow meter and a manual two-position three-way valve are connected to the parking unit brake. When the manual two-position three-way valve is opened, compressed air enters the parking chamber of the parking unit brake. At this time, the air flow meter reading is observed. If the reading remains zero after two seconds, it indicates that the parking chamber of the parking unit brake has good sealing performance. When the manual two-position three-way valve is switched, compressed air enters the driving chamber of the parking unit brake. At this time, the air flow meter reading is observed. If the reading remains zero after two seconds, it indicates that the driving chamber of the parking unit brake has good sealing performance. Conversely, if the reading cannot be zero, it indicates that the driving chamber of the parking unit brake has poor sealing performance.

[0031] The pressure regulating valve is set to 0.3 MPa (simulating the weak braking mode of a mixed-rail vehicle), and the same testing method is used to determine the sealing performance and hidden air leakage of the parking unit brake.

[0032] The wind pressure brake detection unit of this device can also detect other pneumatic components. That is, the pressure value is set by the pressure regulating valve, and the air pressure required for the detection of other pneumatic components is provided by the manually controlled two-position three-way valve. The value of the air flow meter is observed to determine its performance.

[0033] The specific applications of this testing device are as follows:

[0034] When a fault occurs where the air pressure fails to reach the standard pressure value within a specified time, this testing device is connected to the vehicle-mounted air compressor to test and determine its air supply performance. If the air compressor's air supply performance is normal, the system can be pressure-holding tested through the air pressure brake testing unit of this testing device. An air flow meter can detect air leaks caused by poor system sealing, allowing for repairs. If necessary, an external air source can be used to supplement the air supply, reducing wear and tear on the vehicle-mounted air compressor.

[0035] When braking occurs and the air pressure drops rapidly, causing the air compressor to be unable to keep up with the air supply, this testing device can be connected to the input interface of the parking unit brake. With the assistance of an external air source, each parking unit brake can be tested directly and individually. The pressure regulating valve of this device simulates various braking modes of a mixed-rail vehicle. Through air charging and pressurization tests under various braking modes, the braking performance and sealing performance of the parking unit brake can be quickly determined, and air leakage faults caused during braking can be detected and repaired.

[0036] When a braking or disengagement malfunction occurs, this testing device is connected to the solenoid valve and proportional valve interfaces of the system. The two control circuits of this device control the solenoid valve and proportional valve respectively. If the malfunction does not occur, the fault lies in the vehicle's brake control unit, and the fault needs to be checked in the vehicle's brake control unit. If the fault persists, the corresponding solenoid valve or proportional valve needs to be replaced.

[0037] When a discrepancy occurs between the air pressure information displayed on the vehicle's integrated information display screen and the air pressure values ​​shown on the pressure gauge and regulating valve, connect this testing device to the vehicle's main air reservoir and control air circuit output interface. Read the current air pressure value through the regulating valve and pressure gauge in the device, and compare it with the vehicle's regulating valve and pressure gauge. If the pressure values ​​are inconsistent, replace the regulating valve or pressure gauge. If the pressure values ​​are consistent, check and replace the corresponding pressure sensor.

[0038] Using this testing device, all components in the wind pressure braking system can be tested separately. It provides a means of troubleshooting and troubleshooting recurring and difficult faults, avoiding the decrease in efficiency caused by repeated work due to incorrect judgments when multiple components deteriorate at the same time or the fault symptoms are not obvious, thus affecting the normal production and operation of vehicles.

Claims

1. A detection device for the air pressure braking system of a self-propelled hybrid train, characterized in that: This device includes an on-board air compressor drive control unit, a component detection unit, and an air pressure brake detection unit for the wind pressure braking system. The vehicle-mounted air compressor drive control unit includes an air switch, a thermal relay, a relay, a pressure switch, a normally closed stop button, and a normally open start button. The upper end of the air switch is connected to an external power supply, and the lower end is connected in sequence to the thermal relay contact, the relay contact, and the air compressor motor. The thermal relay coil, the normally closed stop button, the normally open start button, the pressure switch, and the relay coil are connected in series to the external control power supply. The component detection unit includes a power switch, an AC / DC power supply, an adjustable AC / DC power supply, a first test switch, a second test switch, a solenoid valve connector, and a proportional valve connector. The upper end of the power switch is connected to an external control power supply, and the lower end is connected to the input terminals of the AC / DC power supply and the adjustable AC / DC power supply, respectively. The output terminal of the AC / DC power supply is connected to the solenoid valve connector via the first test switch, and the output terminal of the adjustable AC / DC power supply is connected to the proportional valve connector via the second test switch. The wind pressure braking detection unit includes a shuttle valve, a first shut-off valve, a check valve, an air tank, a second shut-off valve, a pressure regulating valve, a first pressure gauge, an air flow meter, an air pressure sensor, and several manually controlled two-position three-way valves. The input end of the shuttle valve is connected to a vehicle-mounted air compressor or an external air source, and the output end is connected to the input end of the air tank via the first shut-off valve and the check valve. The output end of the air tank is connected to the input end of the pressure regulating valve via the second shut-off valve. The output end of the pressure regulating valve is connected to the input ends of several manually controlled two-position three-way valves via the air flow meter. The first pressure gauge and the air pressure sensor are respectively located at the input end and the output end of the air flow meter.

2. The detection device for the air pressure braking system of a self-propelled hybrid train according to claim 1, characterized in that: The external power supply is a three-phase 380V power supply, and the external control power supply is a single-phase 220V power supply connected to the external power supply.

3. The detection device for the air pressure braking system of a self-propelled hybrid train according to claim 1, characterized in that: The AC / DC power supply is a 220V AC to 24V DC power supply, and the adjustable AC / DC power supply is a 220V AC to 24V DC power supply with adjustable voltage.

4. The detection device for the air pressure braking system of a self-propelled hybrid train according to claim 1, characterized in that: The air storage tank of the wind pressure brake detection unit is equipped with a drain outlet, a safety valve, and a second pressure gauge.

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