Brake teaching system for locomotives

Abstract

The present application relates to the brake teaching system of locomotive, belong to the technical field of teaching and training. Including locomotive simulation driving device, air source system, brake cabinet and brake, brake cabinet includes controller and brake air circuit, controller connects locomotive simulation driving device, controller is used to receive the brake command sent by locomotive simulation driving device;The inlet of brake air circuit is used to communicate air source system, the outlet of brake air circuit is used to communicate the brake cylinder of brake, and flow regulating device is arranged on brake air circuit;Brake includes brake cylinder and brake clamp mechanism, and brake cylinder drive connection brake clamp mechanism. The brake teaching system of the present application is simple in structure, on the basis of saving system cost, can accurately simulate the brake process and brake failure process of brake cylinder, improve the fault judgment and processing capacity of students, so as to realize the simulation of locomotive brake failure, so that students can determine the fault reason according to the training content, to achieve the purpose of training students.

Description

Technical Field

[0001] The invention relates to a locomotive braking teaching system and belongs to the technical field of teaching and training. Background Art

[0002] In traditional technology, for the emergency response and skills training of railway harmonious electric railway locomotives and vehicle crew members and maintenance personnel, various railway bureaus, colleges and universities, and locomotive depots generally lack systematic and intuitive training facilities and equipment. They basically rely on traditional train-following or on-site maintenance for learning and training, and there are no systematic training methods and modern training facilities and equipment. The shortcoming is that the training opportunities for relevant personnel (mainly trainees) are very limited. They can only receive corresponding training and learning when the equipment is under maintenance. Moreover, on-site training can only be carried out according to the actual situation on site, and cannot be carried out according to specific training needs. As a result, the trainees' fault judgment and handling capabilities are not high after they become railway locomotive and vehicle crew members and maintenance personnel.

[0003] At present, although there are some brake training systems, these training systems completely simulate the locomotive's braking system, especially the simulation of the brake cabinet, which contains various modules, solenoid valves, mechanical valves, and corresponding mechanisms. This makes the structure of the training system too complicated, greatly increasing the training cost. Summary of the Invention

[0004] The object of the present invention is to provide a locomotive braking teaching system for solving the problem that the existing training system completely simulates the real structure of the locomotive, resulting in high costs.

[0005] The locomotive braking teaching system of the present invention adopts the following technical solutions:

[0006] It includes a locomotive simulation driving device, a wind source system, a brake cabinet and brakes, including:

[0007] The brake cabinet includes a controller and a brake air circuit, the controller is connected to the locomotive driving simulation device, and the controller is used to receive a brake command sent by the locomotive driving simulation device;

[0008] The inlet of the brake air circuit is used to connect to the air supply system, the outlet of the brake air circuit is used to connect to the brake cylinder of the brake, and a flow regulating device is provided on the brake air circuit;

[0009] The brake comprises a brake cylinder and a brake caliper mechanism, and the brake cylinder drives and connects the brake caliper mechanism.

[0010] The beneficial effects of the above technical solution are:

[0011] The teaching principle implemented in the present invention is as follows: First, brake training is performed. A locomotive driving simulator issues a brake command to the controller of a simulated brake cabinet. The controller controls the flow control device in the brake air circuit, ensuring that the simulated air supply system can properly supply air to the connected brake cylinders. The simulated brake cylinders receive air and brake normally. Next, brake release training is performed. The locomotive driving simulator issues a brake release command to the controller of the simulated brake cabinet. The controller controls the flow control device in the brake air circuit, preventing the simulated air supply system from properly connecting to the brake cylinders. This deprives the simulated brake cylinders of air, leading to brake release. Compared to existing teaching systems that fully simulate locomotive braking systems, the present invention's braking teaching system is simpler in structure, reduces system costs, and accurately simulates the braking process of the brake cylinders and the process of brake failure, thereby improving trainees' fault diagnosis and handling capabilities. This simulates locomotive braking failures, enabling trainees to determine the cause of the failure based on the training content, thereby achieving the purpose of training.

[0012] In order to realize the braking simulation of the service brake cylinder and the parking brake cylinder, further, the brake air circuit includes a service brake air circuit and a parking brake air circuit, the brake cylinder includes a service brake cylinder and a parking brake cylinder, the service brake air circuit is connected to the service brake cylinder, and the parking brake air circuit is connected to the parking brake cylinder.

[0013] In order to realize the simulation of the brake cabinet sending air control signals to the simulated locomotive, the brake cabinet further includes an air supply path, the inlet of the air supply path is used to connect to the air supply system, and the outlet of the air supply path is used to connect to the air supply valve of the simulated locomotive.

[0014] In order to simulate the brake failure, the flow regulating device further includes a solenoid valve and a coil control circuit of the solenoid valve. The air inlet of the solenoid valve is used to connect to the air cylinder of the locomotive air source system through the air path; the first air outlet of the solenoid valve is used for exhaust, and the second air outlet of the solenoid valve is used to connect to the brake cylinder through the brake cylinder pipe; the coil control circuit of the solenoid valve is used to control the air inlet of the solenoid valve to connect the first air outlet and the second air outlet.

[0015] In order to realize the gating control of the solenoid valve, further, a power supply, a controllable switch and the coil of the solenoid valve are connected in series in the coil control circuit of the solenoid valve, and the controller controls the connection of the controllable switch.

[0016] In order to realize the control of the controllable switch, further, the controllable switch is a contact switch of a relay, and the controller controls the connection of the controllable switch through a relay control circuit, wherein the relay control circuit is serially connected with a coil of a relay.

[0017] In order to realize the control of the relay, the relay control circuit further includes an optocoupler, the primary side of the optocoupler is connected to the controller, and the secondary side of the optocoupler is connected to the coil of the relay.

[0018] In order to detect the braking operation, the locomotive simulation driving device is further provided with a brake handle, the brake handle is provided with a micro-motion sensor, and the controller detects and connects the micro-motion sensor.

[0019] In order to display the braking information, the locomotive driving simulation device is further provided with a display, and the display is connected to the controller.

[0020] In order to realize power supply for each device in the braking teaching system, the braking teaching system also includes an electrical cabinet, which is connected to the locomotive simulation driving device, wind source system, brake cabinet and brake to provide power supply for each device and is used to simulate the locomotive low-voltage electrical cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a braking teaching system for a locomotive according to the present invention;

[0022] Figure 2 is a schematic diagram of a locomotive driving simulation device of the present invention;

[0023] Figure 3-1 Schematic diagram of the braking of the service brake cylinder of the present invention;

[0024] Figure 3-2 Schematic diagram of the parking brake cylinder of the present invention;

[0025] Figure 4 It is a display diagram of the brake release state of the brake indicator and the bounce stop indicator of the present invention;

[0026] Figure 5 It is a display diagram of the braking state of the brake indicator and the bounce indicator of the present invention;

[0027] Figure 6 This is a schematic diagram of the connection relationship of the solenoid valve of the present invention;

[0028] Figure 7 This is a coil control circuit diagram of a solenoid valve of the present invention;

[0029] Figure 8 This is another coil control circuit diagram of a solenoid valve of the present invention.

[0030] The numbers in the figure are explained as follows:

[0031] Z09, solenoid valve; MR, locomotive air supply system; A1, second air outlet; A2, air inlet; A3, first air outlet; EX, external atmosphere; Z10, valve; Z11, brake cylinder pipe; Z111, spring brake cylinder pipe; Z12, brake cylinder; Z121, parking brake cylinder; Z13, brake caliper; Z14, wheelset; VCC, power supply; K1, controllable switch; VAL0, coil; D1, voltage regulator; RL, relay; OPLA, optocoupler; R1, R2, resistors; GND, power ground. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0033] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0034] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0035] This embodiment provides a braking teaching system for a locomotive, such as Figure 1 As shown, it includes a locomotive simulation driving device, a simulated air source system, a simulated brake cabinet (CCBII brake cabinet), a simulated bogie (including a simulated brake), a simulated double-pipe air supply system and a simulated locomotive head. Each part is described below.

[0036] The simulated brake cabinet is the main part, which includes a controller (not shown in the figure), two brake air circuits and other air supply circuits. The controller is connected to the locomotive simulation driving device through a network cable to receive relevant commands sent by the locomotive simulation driving device.

[0037] The brake air circuit consists of two parts: a service brake circuit and a parking brake circuit (not shown). The service brake circuit connects to the service brake cylinder of the simulated brake via a brake cylinder pipe, while the parking brake circuit connects to the parking brake cylinder of the simulated brake via a parking pipe, enabling both types of braking simulation. The inlets of the two brake air circuits connect to the air supply system, while the outlets connect to the brake cylinder of the simulated brake. Each brake air circuit is equipped with a flow control device to control the air flow in each circuit.

[0038] The simulated bogie includes a wheelset Z14 (with brake discs installed), a traction motor, a unit brake with a spring brake, and brake shoes installed on the unit brake. The unit brake includes a service brake cylinder Z12 (such as Figure 3-1 As shown), parking brake cylinder Z121 (as shown Figure 3-2 The simulated bogie is used to simulate the locomotive's traction motion. The traction brake applied from the driver's console enables the wheelset to rotate and adjust its speed. The simulated bogie's unit brake controls the wheelset's stopping based on the output air circuit status of the simulated brake cabinet.

[0039] In this embodiment, the simulated bogie is equipped with a brake indicator and a spring stop indicator, which display the corresponding status according to the current brake cylinder (service brake cylinder) and spring brake cylinder (parking brake cylinder). Figure 4 , when the brake indicators I and II are green, the braking state is relieved; Figure 5 When the brake indicators I and II are red, the braking action is applied.

[0040] The locomotive driving simulator is provided with a brake handle and a display, wherein the brake handle is provided with a micro-motion sensor, and the controller detects and connects to the micro-motion sensor. The locomotive driving simulator is also provided with a display, and the display is connected to the controller.

[0041] The simulated driving console is equipped with a brake module (i.e., EBV electronic brake valve, implemented through the brake handle), a backup brake valve, a display module, a parking brake application button, and a parking brake release button, such as Figure 2As shown, the brake module is connected to a controller for operating the brake module and sending a brake signal to the controller, causing the simulated brake to be controlled accordingly. The backup brake valve, parking brake apply button, and parking brake release button all simulate components found on a real locomotive operator's console. The backup brake valve serves as a backup valve to replace the EBV electronic brake valve, the parking brake apply button outputs a parking brake apply command to the controller, and the parking brake release button outputs a parking brake release command to the controller. The controller is connected to a dual-pulse solenoid valve, which includes an action solenoid valve, a control air circuit for the action solenoid valve, a release solenoid valve, and a control air circuit for the release solenoid valve. Among them, one end of the control air circuit of the action solenoid valve is used to connect to the parking brake cylinder in the simulated brake cabinet, and the other end is used to connect to the external atmosphere; one end of the controller circuit of the relief solenoid valve is used to connect to the parking brake cylinder in the brake cabinet, and the other end is used to connect to the parking pipe (parking brake cylinder pipe), which is arranged at the bottom of the simulated brake cabinet, and the parking pipe is used to connect to the parking brake cylinder Z121 through a high-pressure hose (i.e., spring brake cylinder pipe Z111).

[0042] The display module includes an LCDM display, a total air / train pipe air pressure gauge and a brake cylinder air pressure gauge (used to display the pressure of brake cylinder I / II), wherein the brake cylinder air pressure gauge is connected to a pressure sensor, which is arranged in the brake cylinder for detecting the pressure of the brake cylinder; the LCDM display is used to provide braking information display, such as the pressure display of the total air duct / train pipe and brake cylinder, and can also set braking parameters, such as pressure setting.

[0043] In this embodiment, the simulated brake cabinet further includes two air supply paths, the inlets of the two air supply paths are used to connect to the simulated air source system, and the outlets of the two air supply paths are used to connect to the air supply valve of the simulated vehicle head. Figure 1 As shown, one of the air supply paths is connected to the main air duct valve of the simulated locomotive through an averaging pipe (installed at the bottom of the simulated brake cabinet), and the other air supply path is connected to the train pipe of the simulated locomotive through a train pipe (installed at the bottom of the simulated brake cabinet). The averaging pipe is used when two locomotives are reconnected. By connecting the averaging pipes, this locomotive can control the brake cylinder pressure of the auxiliary locomotive, so that the two locomotives can brake or release at the same time. The train pipe is used to connect the entire train to control the braking and release of the entire train.

[0044] The simulated dual-pipe air supply system includes a first air supply line and a second air supply line. The first air supply line has a smaller and adjustable air volume, while the second air supply line has a larger but unadjustable air volume. These lines are used to transmit air from the simulated air source system to the simulated locomotive. The simulated locomotive includes a train duct valve, an averaging duct valve, and a main duct valve. The main duct valve connects the simulated dual-pipe air supply system and controls whether air is discharged.

[0045] In this embodiment, the simulated air source system is implemented by an air compressor to save equipment costs. As another implementation method, an air compressor can also be connected to an air cylinder through a connecting pipe, and the air cylinder provides the air source for the simulated brake cabinet and the simulated dual-pipe air supply system. The function of the air compressor is to generate compressed gas. The start and stop pressure points can be set. When the pressure is lower than the minimum pressure, the compressor starts working. When it is higher than the set maximum pressure, the compressor stops working. It works in this reciprocating cycle. The air cylinder partially stores compressed air to avoid frequent starting and stopping of the compressor. The air cylinder supplies compressed air to the CCBII brake cabinet.

[0046] Figure 1 The braking teaching system also includes a simulated locomotive low-voltage electrical cabinet, which supplies power to the various electrical equipment in the locomotive simulation driving device, simulated air source system, simulated brake cabinet, simulated locomotive head, double-tube air supply system and simulated bogie.

[0047] In this embodiment, the two flow regulating devices have the same structure. The following takes the flow regulating device provided on the service brake air path as an example to illustrate its specific implementation. Figure 6 As shown, it includes a solenoid valve Z09 and a coil control circuit of the solenoid valve Z09, as shown in FIG. Figure 1 As shown, the solenoid valve Z09's air inlet A2 is connected to the air cylinder of the locomotive's air supply system MR via an air path. The solenoid valve's first air outlet A3 is used for exhaust. The solenoid valve's second air outlet A1 is connected to the locomotive's bogie's brake cylinder Z12 via a brake cylinder pipe Z11. Brake cylinder pipe Z11 is equipped with a valve Z10 for discharging air from brake cylinder Z12. The solenoid valve Z09's coil control circuit controls the valve's air inlet A2 to connect to the first air outlet A3 and the second air outlet A1, enabling braking simulation and brake failure simulation.

[0048] Based on the above-mentioned braking teaching system, the teaching and training contents implemented are as follows:

[0049] (1) Brake operation training

[0050] Operate the EBV electronic brake valve so that the handle of the EBV electronic brake valve is in the braking position. The driving console sends a brake application instruction (i.e., brake signal) to the simulated brake cabinet. The controller controls the coil control circuit of the solenoid valve Z09 to be turned on, so that the coil VAL0 of the solenoid valve Z09 is energized, thereby controlling the air inlet A2 of the solenoid valve Z09 to connect to the second air outlet A1, forming an air path, so that the air source in the air cylinder of the air source system MR is inflated to the service brake cylinder Z12 of the bogie, simulating the brake caliper Z13 of the bogie to clamp the wheelset Z14 for braking.

[0051] Operate the EBV electronic brake valve to the operating position. The driving console sends a brake release command to the simulated brake cabinet. The controller does not send a control signal to the coil control circuit, so that the coil VAL0 of the solenoid valve Z09 is not energized, thereby connecting the air inlet A2 of the solenoid valve Z09 to the first air outlet A3, and exhausting the air source to the external atmosphere EX; open the valve Z10, and when the brake cylinder Z12 is exhausted, the brake caliper Z13 is released. When the brake pad of the brake caliper Z13 and the wheelset Z14 restore the clearance state, the wheelset Z14 can rotate, such as Figure 3-1 shown.

[0052] When the parking brake apply button is pressed, the driver's console sends a parking brake apply command to the controller of the simulated brake cabinet. When the parking brake release button is pressed, the driver's console sends a parking brake release command to the controller of the simulated brake cabinet. Specifically, when the brake cabinet controller receives the parking brake apply command, it controls the action solenoid valve on the dual-pulse solenoid valve to be energized, causing the air in the parking brake cylinder in the simulated brake cabinet to be evacuated through the action solenoid valve, causing the brake caliper to actuate and apply the parking brake. When the brake cabinet controller receives the parking brake release command, it controls the release solenoid valve on the dual-pulse solenoid valve to be energized, causing compressed air to enter the parking brake cylinder through the release solenoid valve, releasing the caliper and releasing the parking brake.

[0053] (2) Brake failure training

[0054] Simulated phenomenon: The brake cylinder pressure cannot be established, resulting in the locomotive being unable to brake.

[0055] Fault setting: operate the EBV electronic brake valve so that the handle of the EBV electronic brake valve is in the braking position. The driving platform sends a brake application instruction to the controller of the simulated brake cabinet. According to the instruction, the controller combines the current training mode (i.e. brake failure fault training) to control the air inlet A2 and the first air outlet A3 of the solenoid valve Z09 to be connected, thereby controlling the air cylinder of the locomotive air source system MR to exhaust through the first air outlet A3, so that the air cylinder cannot be normally connected to the brake cylinder Z12 of the locomotive bogie. The brake cylinder Z12 cannot obtain the air source discharged by the air cylinder, so that the brake cylinder Z12 of the bogie does not brake, and the brake caliper Z13 cannot clamp the wheelset Z14, resulting in brake failure, thereby realizing the brake failure fault simulation of the locomotive.

[0056] Fault analysis: The trainee observed the display module on the console (i.e., the brake cylinder air pressure gauge) and found that the pressure in the brake cylinder was abnormal. The trainee checked and confirmed that valve Z10 was open and the pipeline between the simulated brake cabinet and the brake cylinder was intact without leakage. The trainee determined that the brake cylinder control module (also known as the BCCP module) of the simulated brake cabinet was faulty. After virtually replacing the BCCP module in the 3D software, the trainee tested again and restored the normal braking function. The fault was successfully repaired. The above-mentioned 3D software is installed in the control chip of the auxiliary touch screen, which is used to operate the three-dimensional virtual display computer. Figure 1 The visual splicing display screen in the training hall is used for troubleshooting. It virtually displays the various components of the brake cabinet, allowing trainees to click on them to perform virtual replacement operations.

[0057] The display screen displays the functions realized by the system in a three-dimensional scene effect, restoring various line scenes, stations, and showing the operation status of locomotives. It can also conduct training and drills of various driving operations, as well as training and assessment of theoretical knowledge through multimedia training.

[0058] The above is the simulated training process of the flow regulating device on the service brake air circuit. For the flow regulating device on the parking brake air circuit, during the brake operation training, the control of the selected air circuit in the solenoid valve is just the opposite, that is, the brake training of the flow regulating device on the service brake air circuit is to brake during inflation control and to release the brake during exhaust control, while the brake training of the flow regulating device on the parking brake air circuit is to brake during exhaust control and to release the brake during inflation control. The specific control process will not be described in detail.

[0059] For the parking brake failure fault simulation, it is necessary to control the air inlet and the second air outlet of the solenoid valve to be connected, thereby controlling the air cylinder of the locomotive air source system to be connected to the parking brake cylinder Z121 of the bogie. The parking brake cylinder Z121 obtains the air source provided by the air cylinder and is inflated, so that the parking brake cylinder Z121 does not perform the parking brake, realizing the parking brake failure fault simulation, so that the trainees can determine the cause of the fault based on this phenomenon and conduct fault analysis to achieve the purpose of training the trainees.

[0060] In this embodiment, the coil control circuit of the solenoid valve Z09 is as follows: Figure 7 As shown, the control circuit is provided with a power supply VCC, a controllable switch K1 and a coil VAL0 of a solenoid valve Z09 in series. The controllable switch K1 ( Figure 7 The control terminal of the transistor (in the figure) is connected to the controller, which generates a control signal (e.g., a high-level signal) from the controller to conduct the coil control circuit, thereby energizing the coil VAL0 of the solenoid valve Z09 and connecting the air inlet A2 and the second air outlet A1 of the solenoid valve Z09. When the controller generates a low-level signal, the coil control circuit is disconnected, connecting the air inlet A2 and the first air outlet A3 of the solenoid valve Z09.

[0061] As another embodiment, the coil control circuit of the solenoid valve Z09 is as follows: Figure 8 As shown, the controllable switch is the contact switch of relay RL. The controller controls the controllable switch (i.e., the contact switch of the relay) through the relay control circuit. The relay control circuit includes an optocoupler OPLA. The primary side of the optocoupler OPLA is connected to the controller (not shown in the figure). Resistor R1 (with a resistance of 1K) is connected to one end of the primary side, and the other end of the primary side is connected to the controller. The primary side is connected in parallel with a resistor R2 (with a resistance of 2K). The secondary side of the optocoupler OPLA is connected to the coil of relay RL. The relay coil is connected in parallel with a voltage regulator diode D1 to provide voltage stabilization. The control principle of the coil control circuit is that the controller provides a control signal (low-level signal OA0) to turn on the primary side of the optocoupler OPLA, triggering the secondary side of the optocoupler OPLA to turn on, thereby achieving the purpose of controlling the coil of relay RL.

[0062] In this embodiment, the brake training system also includes a micro-motion sensor located at valve Z10. The controller detects the micro-motion sensor and transmits the sensor's signal to the controller to detect valve on / off. In this embodiment, the micro-motion sensor is a travel switch. Compressed air can only enter the brake cylinder when Z10 is in the open position. Trainees can be trained on the correct operation of this device. If the valve is not in the open position, the software display will indicate this.

[0063] Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. For example, the controller in this embodiment can be located in either the simulated brake cabinet or the driver's console, depending on the specific circumstances. Furthermore, the number of controllers can vary, from one controller to multiple controllers. For example, different controllers can be provided for different functions, and the controllers can be communicatively connected when needed.

[0064] For example, in this embodiment, the brake cylinder pressure anomaly is detected by the brake cylinder air pressure gauge. As another embodiment, the brake cylinder pressure anomaly can also be detected by the display anomaly on the display.

[0065] Therefore, based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present invention.

[0066] It should be noted that in the specific application of this embodiment, two sets of electromagnetic valves and coil control circuits are set according to the different brake cylinders included in the bogie. Figure 3-2 When the service brake cylinder and parking brake cylinder are shown, two sets of solenoid valves and coil control circuits with the same structure are used to control them respectively; when the bogie only includes Figure 3-1 The service brake cylinder shown does not include a parking brake cylinder, and only a set of solenoid valves and coil control circuits are required for control.

Claims

1. A locomotive braking teaching system, characterized in that: It includes a locomotive simulation driving device, a simulation air source system, a simulation brake cabinet and a simulation brake, among which: The simulated brake cabinet includes a controller and a brake air circuit. The controller is connected to the locomotive simulation driving device and is used to receive a brake command sent by the locomotive simulation driving device. The brake command includes a brake application instruction. The inlet of the brake air circuit is used to connect to the simulated air source system, and the outlet of the brake air circuit is used to connect to the brake cylinder of the simulated brake, the brake air circuit includes a service brake air circuit, the brake cylinder includes a service brake cylinder, and the service brake air circuit is connected to the service brake cylinder; a solenoid valve and a coil control circuit of the solenoid valve are provided on the brake air circuit; the controller is used to control the coil control circuit of the solenoid valve on the service brake air circuit to be turned on under the brake application instruction and brake operation training mode, so that the coil of the solenoid valve is energized, thereby controlling the air inlet of the solenoid valve to be connected to the second air outlet, so that the air source in the air cylinder of the air source system is inflated to the service brake cylinder; the controller is also used to control the air inlet of the solenoid valve on the service brake air circuit to be connected to the first air outlet under the brake application instruction and brake failure fault training mode, so that the air cylinder of the air source system is exhausted through the first air outlet and cannot be normally connected to the service brake cylinder; The simulated brake comprises a brake cylinder and a brake caliper mechanism, and the brake cylinder drives and connects the brake caliper mechanism.

2. The locomotive braking teaching system according to claim 1, characterized in that: The brake air circuit also includes a parking brake air circuit, and the brake cylinder also includes a parking brake cylinder, and the parking brake air circuit is connected to the parking brake cylinder; the braking command also includes a parking brake application instruction; the solenoid valve provided on the parking brake air circuit is a double-pulse solenoid valve, including an action solenoid valve, a control air circuit of the action solenoid valve, a relief solenoid valve, and a control air circuit of the relief solenoid valve; one end of the control air circuit of the action solenoid valve is used to connect to the parking brake cylinder in the simulated brake cabinet, and the other end is used to connect to the external atmosphere; one end of the control air circuit of the relief solenoid valve is used to connect to the parking brake cylinder in the simulated brake cabinet, and the other end is used to connect to the parking brake cylinder; The controller is also used to control the action solenoid valve to be energized in the parking brake application instruction and brake operation training mode, so that the air in the parking brake cylinder is discharged through the action solenoid valve; and to control the release solenoid valve to be energized in the parking brake application instruction and brake failure fault training mode, so that the air in the parking brake cylinder enters the parking brake cylinder through the release solenoid valve.

3. The locomotive braking teaching system according to claim 1 or 2, characterized in that: The simulated brake cabinet also includes an air supply path, the inlet of the air supply path is used to connect to the simulated air source system, and the outlet of the air supply path is used to connect to the air supply valve of the simulated vehicle head.

4. The locomotive braking teaching system according to claim 1, characterized in that: A power supply, a controllable switch and the coil of the solenoid valve are connected in series in the coil control circuit of the solenoid valve, and the controller controls the connection of the controllable switch.

5. The locomotive braking teaching system according to claim 4, characterized in that: The controllable switch is a contact switch of a relay, and the controller controls the connection of the controllable switch through a relay control circuit, wherein a coil of a relay is connected in series in the relay control circuit.

6. The locomotive braking teaching system according to claim 5, characterized in that: The relay control circuit includes an optocoupler, a primary side of the optocoupler is connected to the controller, and a secondary side of the optocoupler is connected to the coil of the relay.

7. The locomotive braking teaching system according to claim 1, characterized in that: The locomotive driving simulation device is provided with a brake handle, the brake handle is provided with a micro-motion sensor, and the controller detects and connects to the micro-motion sensor.

8. The locomotive braking teaching system according to claim 7, characterized in that: The locomotive driving simulation device is also provided with a display, which is connected to the controller.

9. The locomotive brake teaching system according to claim 1, 2, 7 or 8, characterized in that: The brake teaching system further comprises a simulation electrical cabinet, which is connected to the locomotive simulation driving device, the air source system, the brake cabinet and the brake for power supply.

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