Simulation practical training device for railway maintenance mechanical braking system

Abstract

The utility model discloses a railway maintenance machinery brake system simulation practical training device, which belongs to the technical field of teaching equipment and comprises a display cabinet, a YZ-1 brake system, a YZ-1G brake system and a main air reservoir are arranged on the display cabinet, an air inlet end and an air exhaust end are arranged on the main air reservoir, the air inlet end of the main air reservoir is connected with an air compressor, and the air exhaust end of the main air reservoir is connected with an air outlet of the air compressor. The air exhaust end of the main air cylinder supplies air to the YZ-1 braking system and the YZ-1G braking system through a three-way connector, and a switching assembly is arranged on a connecting pipeline of the YZ-1 braking system and the YZ-1G braking system. Practical training teaching of a YZ-1 braking system and a YZ-1G braking system can be realized on one set of simulation practical training equipment, sharing of a common part is realized by the two sets of braking systems, the utilization rate of teaching equipment is improved, virtual-real combined teaching is beneficial to mastering of a large-scale road maintenance machinery braking technology, and the teaching efficiency is improved. And the YZ-1 braking system and the YZ-1G braking system are parts on a real vehicle, so that the real accuracy of simulation practical training is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of teaching equipment, and in particular relates to a simulation training device for a railway track maintenance machinery braking system. Background Art

[0002] Large-scale railway maintenance machinery is a large-scale equipment that uses the railway "window" time to repair and maintain the railway line. It is required that the large-scale railway maintenance machinery can safely reach the construction line within the specified time and successfully complete the construction task. The key equipment to ensure safe driving and vehicle construction is the brake installed on each vehicle.

[0003] Most of the vehicles produced before 2010 for large-scale railway maintenance machinery use the YZ-1 brake machine, and most of the vehicles produced after 2010 use the upgraded YZ-1G brake machine. Correct braking operation and rapid troubleshooting are crucial to the safe operation of large-scale maintenance machinery and to improve the operation and maintenance efficiency.

[0004] The training of brake system of large road maintenance machinery should first learn the structure and function of each component of the brake machine and be familiar with its working principle. On the one hand, it is difficult to organize and the cost is too high to conduct practical training on large road maintenance machinery. Some components are blocked by other components of large road maintenance machinery, and the driver's cab is small, which leads to poor teaching effect.

[0005] Therefore, it is urgent to design a simulation training device for railway maintenance machinery braking system to solve the above-mentioned problems. Utility Model Content

[0006] The purpose of the utility model is to provide a simulation training device for a railway track maintenance machinery braking system, which has the advantages of improving the utilization rate of teaching equipment, and the combination of virtual and real teaching is conducive to the mastery of the braking technology of large-scale track maintenance machinery, thereby solving the problems mentioned in the background technology.

[0007] In order to achieve the above-mentioned purpose, the specific technical scheme of a simulation training device for a railway maintenance machinery braking system of the utility model is as follows:

[0008] A simulation training device for a railway track maintenance machinery brake system comprises a display cabinet, on which a YZ-1 brake system, a YZ-1G brake system, a main air cylinder and a common component are arranged, the main air cylinder is provided with an air inlet end and an air outlet end, the air inlet end of the main air cylinder is connected to an air compressor, the air outlet end of the main air cylinder supplies air to the YZ-1 brake system and the YZ-1G brake system through a three-way joint, a switching component is arranged on the connecting pipelines of the YZ-1 and YZ-1G brake systems, the common component is connected to the YZ-1 brake system and the YZ-1G brake system through a common pipeline, and the common components are connected to each other through a common pipeline;

[0009] The switching component is provided with a first state, a second state and a third state;

[0010] When the switching component is in the first state, the common component is connected to the YZ-1 brake system, and the common component is not connected to the YZ-1G brake system;

[0011] When the switching component is in the second state, the common component is connected to the YZ-1G brake system, and the common component is not connected to the YZ-1 brake system;

[0012] When the switching component is in the third state, the common component is not connected to the YZ-1 brake system and the YZ-1G brake system.

[0013] Furthermore, the common pipeline includes a main air duct, a train pipe, a balancing pipe, an action pipe, a working air cylinder pipe, a single slow-release pipe and a brake cylinder pipe. The common pipeline is respectively connected to a first branch pipe and a second branch pipe. The first branch pipe is connected to the YZ-1 brake system, and the second branch pipe is connected to the YZ-1G brake system.

[0014] Further, the switching component includes a first cut-off plug door switch and a second cut-off plug door switch, the first cut-off plug door switch is arranged on the first branch pipe, and the first cut-off plug door switch is opened and closed to control whether the common component is connected to the YZ-1 brake system, and the second cut-off plug door switch is arranged on the second branch pipe, and the first cut-off plug door switch is opened and closed to control whether the common component is connected to the YZ-1G brake system;

[0015] When the switching component is in the first state, the first cut-off plug switch is in the connected state, so that the common component is connected to the YZ-1 brake system, and the second cut-off plug switch is in the closed state, so that the common component is not connected to the YZ-1G brake system;

[0016] When the switching component is in the second state, the first cut-off plug switch is in the closed state, so that the common component is not connected to the YZ-1 brake system, and the second cut-off plug switch is in the connected state, so that the common component is connected to the YZ-1G brake system;

[0017] When the switching component is in the third state, the first cut-off plug switch and the second cut-off plug switch are both in the closed state, so that the common component is not connected to the YZ-1 brake system and the YZ-1G brake system.

[0018] Further, the switching component includes a first solenoid valve and a second solenoid valve, the first solenoid valve is arranged on the first branch pipe, and the first solenoid valve is opened and closed to control whether the common component is connected to the YZ-1 brake system, and the second solenoid valve is arranged on the second branch pipe, and the second solenoid valve is opened and closed to control whether the common component is connected to the YZ-1G brake system;

[0019] When the switching component is in the first state, the first solenoid valve is in the open state, so that the common component is connected to the YZ-1 brake system, and the second solenoid valve is in the closed state, so that the common component is not connected to the YZ-1G brake system;

[0020] When the switching component is in the second state, the first solenoid valve is in a closed state, so that the common component is not connected to the YZ-1 brake system, and the second solenoid valve is in an open state, so that the common component is connected to the YZ-1G brake system;

[0021] When the switching component is in the third state, the first solenoid valve and the second solenoid valve are both in the closed state, so that the common component is not connected to the YZ-1 brake system and the YZ-1G brake system.

[0022] Furthermore, the common components include a brake cylinder, which is arranged on the cabinet and is connected to the YZ-1 brake system and the YZ-1G brake system respectively through a switching component.

[0023] Furthermore, the common components include an automatic brake valve, which is arranged on the cabinet and connected to the main air duct, the balancing pipe and the single relief pipe. The automatic brake valve is provided with a relief position, a braking position, a pressure holding position and an operating position. The automatic brake valve is located in different positions to control the braking, pressure holding and relief effects of the brake cylinder.

[0024] Furthermore, the common components also include a separate brake valve, which is arranged on the cabinet and connected to the main air duct and the action pipe. The separate brake valve is provided with a relief position, a neutral position and a braking position, and the braking and relief effects of the brake cylinder are controlled by the automatic brake valve being located in different positions.

[0025] Furthermore, the common components also include an emergency brake valve. An emergency brake valve is provided on the cabinet. The emergency brake valve controls the air-controlled exhaust valve connected to the train pipe. The air-controlled exhaust valve is opened and closed to control whether the brake cylinder performs emergency braking.

[0026] Furthermore, the YZ-1 braking system and the YZ-1G braking system are both equipped with multiple air pressure transmitters, which are electrically connected to the virtual teaching and training system so that the pressure changes in each connecting pipeline of the braking system can be fed back to the virtual teaching and training system in real time, and the braking system schematic diagram in the virtual teaching and training system can change dynamically in real time.

[0027] Furthermore, a display board is fixedly connected to the top surface of the display cabinet, the YZ-1 brake system is located on the display board, the YZ-1G brake system is located on the top surface of the display cabinet, and the main air cylinder is located at the bottom of the display cabinet.

[0028] The utility model has the following advantages: practical training of the YZ-1 brake system and the YZ-1G brake system can be realized on a set of simulation training equipment, the two brake systems share common parts, and the utilization rate of the teaching equipment is improved. The teaching combining virtual and real is conducive to the mastery of the braking technology of large road maintenance machinery, and the YZ-1 brake system and the YZ-1G brake system are both parts on the real vehicle, so as to ensure the authenticity and accuracy of the simulation training. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The overall structure of the simulation training device of the utility model is shown in FIG. Figure 1 ;

[0030] Figure 2 The overall structure of the simulation training device of the utility model is shown in FIG. Figure 2 ;

[0031] Explanation of the markings in the figure: 1. Display cabinet; 11. Display board; 2. YZ-1 brake system; 3. YZ-1G brake system; 4. Main air cylinder; 41. Working air cylinder; 42. Brake cylinder; 43. Automatic brake valve; 44. Individual brake valve; 45. Large gate pressure regulating valve; 46. Auxiliary brake button; 47. Emergency brake valve; 48. Small gate pressure regulating valve; 5. Double-needle pressure gauge; 51. Single-needle pressure gauge. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0033] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0034] Please refer to the attached Figure 1 To Attachment Figure 2 The utility model describes a simulation training device for a railway track maintenance machinery braking system.

[0035] At present, the training of brake system of large road maintenance machinery must first learn the structure and function of each component of the brake machine and be familiar with its working principle. On the one hand, it is difficult to organize and the cost is too high to conduct practical training on large road maintenance machinery. Some components are blocked by other components of large road maintenance machinery, and the driver's cab is small, which leads to poor teaching effect.

[0036] The simulation training device comprises a display cabinet 1, on which a YZ-1 brake system 2, a YZ-1G brake system 3 and a main air cylinder 4 are arranged. The main air cylinder 4 is used to store compressed air to provide a power source for braking.

[0037] The YZ-1 brake system 2 includes a double-chamber air cylinder, a safety valve, a distribution valve, an electric pneumatic valve, a relay valve, an emergency air release valve, and connecting pipes between various components.

[0038] The YZ-1G brake system 3 includes a balancing air cylinder, a relay valve, a distribution valve, an emergency valve, a two-way valve, and connecting pipes between various components.

[0039] Both the YZ-1 brake system 2 and the YZ-1G brake system 3 are components on the actual vehicle, and the operating braking mode of the YZ-1 brake system 2 and the YZ-1G brake system 3 is also the operating braking mode of the actual vehicle, to ensure that during simulation training, the operating braking is the same as that of the actual vehicle.

[0040] Preferably, the YZ-1 braking system 2 and the YZ-1G braking system 3 are each provided with a plurality of air pressure transmitters, and the pressure transmitters are electrically connected to the virtual teaching and training system so as to be able to feed back the pressure changes in each connecting pipeline of the braking system to the virtual teaching and training system in real time, and the braking system schematic diagram in the virtual teaching and training system can be dynamically changed in real time; in other embodiments of the utility model, the indicator light strip installed on the pipeline can be made to emit light or not emit light according to the signal of the pressure transmitter, and the color of the emitted light can display different colors according to different brake pipelines for simulation training.

[0041] Preferably, the virtual teaching and training system includes a display screen for audio, video, animation and dynamic schematic display. Regarding the size of the display screen, the appropriate size can be selected according to actual usage requirements; the virtual teaching and training system also includes a computer host, a data input and output control box, YZ-1 and YZ-1G brake simulation teaching software, etc.; the virtual teaching and training system uses multimedia courseware, and uses three-dimensional views, exploded views, enlarged views, etc. to explain the important knowledge points of the YZ-1 brake system 2 and the YZ-1G brake system 3.

[0042] The main air cylinder 4 is provided with an air inlet end and an air outlet end. The air inlet end of the main air cylinder 4 is connected to the air compressor. The air outlet end of the main air cylinder supplies air to the YZ-1 brake system and the YZ-1G brake system through a three-way joint. A switching component is provided on the connecting pipelines of the YZ-1 and YZ-1G brake systems. The common components are connected to the YZ-1 brake system and the YZ-1G brake system through common pipelines, and the common components are connected to each other through common pipelines.

[0043] The switching component is provided with a first state, a second state and a third state;

[0044] When the switching component is in the first state, the common component is connected to the YZ-1 brake system 2, and the common component is not connected to the YZ-1G brake system 3, so that the brake principle diagram of the YZ-1 brake system 2 is displayed on the virtual teaching and training system through multiple air pressure transmitters on the YZ-1 brake system 2, and can be dynamically changed in real time;

[0045] When the switching component is in the second state, the common component is connected to the YZ-1G brake system 3, and the common component is not connected to the YZ-1 brake system 2, so that the brake principle diagram of the YZ-1G brake system 3 is displayed on the virtual teaching and training system through multiple air pressure transmitters on the YZ-1G brake system 3, and can be dynamically changed in real time;

[0046] When the switching component is in the third state, the common component is not connected to the YZ-1 brake system 2 and the YZ-1G brake system 3.

[0047] Preferably, a dryer and a filter are provided between the air compressor and the main air cylinder 4 .

[0048] The common pipelines include main air duct, train pipe, equalizing pipe, action pipe, working air cylinder pipe, single slow pipe and brake cylinder pipe, and these pipelines are respectively connected with the first branch pipe and the second branch pipe. The first branch pipe is connected to the YZ-1 braking system 2, and the second branch pipe is connected to the YZ-1G braking system 3.

[0049] Regarding the selection of the switching component, the first cut-off plug door switch and the second cut-off plug door switch are preferably used. The first cut-off plug door switch is arranged on the first branch pipe, and the first cut-off plug door switch is opened and closed to control whether the common component is connected to the YZ-1 brake system 2. The second cut-off plug door switch is arranged on the second branch pipe, and the second cut-off plug door switch is opened and closed to control whether the common component is connected to the YZ-1G brake system 3.

[0050] When the switching component is in the first state, the first cut-off plug switch is in the connected state, so that the common component is connected to the YZ-1 brake system 2, and the second cut-off plug switch is in the closed state, so that the common component is not connected to the YZ-1G brake system 3;

[0051] When the switching component is in the second state, the first cut-off plug switch is in the closed state, so that the common component is not connected to the YZ-1 brake system 2, and the second cut-off plug switch is in the connected state, so that the common component is connected to the YZ-1G brake system 3;

[0052] When the switching component is in the third state, the first cut-off plug switch and the second cut-off plug switch are both in the closed state, so that the common component is not connected to the YZ-1 brake system 2 and the YZ-1G brake system 3.

[0053] Preferably, the first cut-off plug gate switch and the second cut-off plug gate switch have different colors to facilitate distinguishing the first cut-off plug gate switch and the second cut-off plug gate switch. At the same time, there are multiple first cut-off plug gate switches and second cut-off plug gate switches, which can be located at the connection points of each pipeline in the common pipeline.

[0054] Regarding the selection of the switching component, in other embodiments, the switching component includes a first solenoid valve and a second solenoid valve, the first solenoid valve is arranged on the first branch pipe, and the first solenoid valve is opened and closed to control whether the common component is connected to the YZ-1 brake system 2, and the second solenoid valve is arranged on the second branch pipe, and the second solenoid valve is opened and closed to control whether the common component is connected to the YZ-1G brake system 3;

[0055] When the switching component is in the first state, the first solenoid valve is in the open state, so that the common component is connected to the YZ-1 brake system 2, and the second solenoid valve switch is in the closed state, so that the common component is not connected to the YZ-1G brake system 3;

[0056] When the switching component is in the second state, the first solenoid valve is in a closed state, so that the common component is not connected to the YZ-1 brake system 2, and the second solenoid valve is in an open state, so that the common component is connected to the YZ-1G brake system 3;

[0057] When the switching component is in the third state, the first solenoid valve and the second solenoid valve are both in the closed state, so that the common component is not connected to the YZ-1 brake system 2 and the YZ-1G brake system 3.

[0058] Preferably, the first solenoid valve and the second solenoid valve are both two-position two-way solenoid valves, and the first solenoid valve and the second solenoid valve are electrically connected to the virtual teaching and training system, and can be controlled by the virtual teaching and training system to achieve one-key conversion in the YZ-1 braking system 2 and the YZ-1G braking system 3, and the number of the first solenoid valve and the second solenoid valve are both multiple, which can be located at the connection points of each pipeline in the common pipeline.

[0059] This simulation training device also includes a fault setting module, which is electrically connected to the virtual teaching and training system to realize the software setting and troubleshooting of common faults of the YZ-1 brake system 2 or the YZ-1G brake system 3, and combined with the evaluation software module, the trainees' brake operation and fault handling capabilities can be evaluated.

[0060] Preferably, the fault setting module uses a solenoid valve to control alone or in combination to achieve the setting and elimination of common faults of the brake machine. In other embodiments of the utility model, multiple manual valves are used to replace the solenoid valve to manually achieve the setting and elimination of faults.

[0061] The common components include a brake cylinder, which is arranged on a cabinet and is connected to the YZ-1 brake system and the YZ-1G brake system respectively through a switching component.

[0062] The common components also include a large gate pressure regulating valve 45, a small gate pressure regulating valve 48, a double-needle pressure gauge 5, a single-needle pressure gauge 51, a working air cylinder 41, etc.; by setting the large gate pressure regulating valve 45, the train pipe pressure can be adjusted; by setting the small gate pressure regulating valve 48, the brake cylinder pressure can be adjusted; the double-needle pressure gauge 5 and the single-needle pressure gauge 51 can display the pressure in the main pipeline of this simulation training device.

[0063] The common components also include an automatic brake valve 43, which is arranged on the cabinet. The automatic brake valve 43 is connected to the main air duct, the balancing pipe and the single slow-release pipe. The automatic brake valve 43 is provided with a relief position, a braking position, a pressure-maintaining position and an operating position. The automatic brake valve 43 is located in different positions to control the braking, pressure-maintaining and relief effects of the brake cylinder 42; the automatic brake valve 43 is used to simulate braking of the entire train.

[0064] The common components also include a separate brake valve 44, which is arranged on the cabinet. The separate brake valve 44 is connected to the main air duct and the action pipe. The separate brake valve 44 is provided with a relief position, a neutral position and a braking position. The automatic brake valve 43 is located in different positions to control the braking and relief effects of the brake cylinder 42. The separate brake valve 44 is used to simulate braking of a separate large road maintenance machinery vehicle.

[0065] The common components also include an emergency brake valve 47, which is arranged on the cabinet. The emergency brake valve 47 controls the air-controlled exhaust valve connected to the train pipe. By opening and closing the air-controlled exhaust valve, it controls whether the brake cylinder 42 produces an emergency braking effect. In an emergency, emergency braking can be performed through the emergency brake valve 47.

[0066] The common components also include an auxiliary brake button 46 , which is disposed on the cabinet. The auxiliary brake button 46 is electrically connected to the brake solenoid valve, so that the brake cylinder 42 can be braked by pressing the auxiliary brake button 46 to activate the brake solenoid valve.

[0067] Furthermore, a display board 11 is fixedly connected to the top surface of the display cabinet 1, the YZ-1 brake system 2 is located on the display board 11, the YZ-1G brake system 3 is located on the top surface of the display cabinet 1, the main air cylinder 4, the working air cylinder 41 and the brake cylinder 42 are located at the bottom of the display cabinet 1, the large gate pressure regulating valve 45, the small gate pressure regulating valve 48, the double-needle pressure gauge 5, the single-needle pressure gauge 51, the automatic brake valve 43, the separate brake valve 44, the emergency brake valve 47, etc. are arranged on the side end of the display cabinet 1 for easy display and viewing by students.

[0068] Preferably, a safety pressure relief solenoid valve is provided at the exhaust end of the main air cylinder 4, so that after the simulation equipment is used for teaching, the power supply is turned off and the pressurized air of the main air cylinder 4 is discharged to the atmosphere, thereby safely releasing the pressure and ensuring the safe use of the equipment.

[0069] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A simulation training device for a railway maintenance machinery braking system, characterized in that: It comprises a display cabinet, on which a YZ-1 brake system, a YZ-1G brake system, a main air cylinder and common components are arranged, an air inlet end and an air exhaust end are arranged on the main air cylinder, the air inlet end of the main air cylinder is connected to an air compressor, the air exhaust end of the main air cylinder supplies air to the YZ-1 brake system and the YZ-1G brake system through a three-way joint, a switching component is arranged on the connecting pipelines of the YZ-1 and YZ-1G brake systems, the common components are connected to the YZ-1 brake system and the YZ-1G brake system through a common pipeline, and the common components are connected to each other through a common pipeline; The switching component is provided with a first state, a second state and a third state; When the switching component is in the first state, the common component is connected to the YZ-1 brake system, and the common component is not connected to the YZ-1G brake system; When the switching component is in the second state, the common component is connected to the YZ-1G brake system, and the common component is not connected to the YZ-1 brake system; When the switching component is in the third state, the common component is not connected to the YZ-1 brake system and the YZ-1G brake system.

2. The simulation training device for the railway maintenance machinery braking system according to claim 1 is characterized in that: The common pipelines include main air duct, train pipe, equalizing pipe, action pipe, working air cylinder pipe, single slow pipe and brake cylinder pipe. The common pipelines are respectively connected with the first branch pipe and the second branch pipe. The first branch pipe is connected to the YZ-1 brake system, and the second branch pipe is connected to the YZ-1G brake system.

3. The simulation training device for the railway maintenance machinery braking system according to claim 2 is characterized in that: The switching component includes a first cut-off plug door switch and a second cut-off plug door switch. The first cut-off plug door switch is arranged on the first branch pipe. The first cut-off plug door switch is opened and closed to control whether the common component is connected to the YZ-1 brake system. The second cut-off plug door switch is arranged on the second branch pipe. The first cut-off plug door switch is opened and closed to control whether the common component is connected to the YZ-1G brake system. When the switching component is in the first state, the first cut-off plug switch is in the connected state, so that the common component is connected to the YZ-1 brake system, and the second cut-off plug switch is in the closed state, so that the common component is not connected to the YZ-1G brake system; When the switching component is in the second state, the first cut-off plug switch is in the closed state, so that the common component is not connected to the YZ-1 brake system, and the second cut-off plug switch is in the connected state, so that the common component is connected to the YZ-1G brake system; When the switching component is in the third state, the first cut-off plug switch and the second cut-off plug switch are both in the closed state, so that the common component is not connected to the YZ-1 brake system and the YZ-1G brake system.

4. The simulation training device for the railway maintenance machinery braking system according to claim 2 is characterized in that: The switching component includes a first solenoid valve and a second solenoid valve. The first solenoid valve is arranged on the first branch pipe. The first solenoid valve is opened and closed to control whether the common component is connected to the YZ-1 brake system. The second solenoid valve is arranged on the second branch pipe. The second solenoid valve is opened and closed to control whether the common component is connected to the YZ-1G brake system. When the switching component is in the first state, the first solenoid valve is in the open state, so that the common component is connected to the YZ-1 brake system, and the second solenoid valve is in the closed state, so that the common component is not connected to the YZ-1G brake system; When the switching component is in the second state, the first solenoid valve is in a closed state, so that the common component is not connected to the YZ-1 brake system, and the second solenoid valve is in an open state, so that the common component is connected to the YZ-1G brake system; When the switching component is in the third state, the first solenoid valve and the second solenoid valve are both in the closed state, so that the common component is not connected to the YZ-1 brake system and the YZ-1G brake system.

5. The simulation training device for the railway maintenance machinery braking system according to claim 1 is characterized in that: The common components include a brake cylinder, which is arranged on a cabinet and is connected to the YZ-1 brake system and the YZ-1G brake system respectively through a switching component.

6. The simulation training device for the railway maintenance machinery braking system according to claim 5 is characterized in that: Common components also include an automatic brake valve, which is installed on the cabinet and connected to the main air duct, the balancing pipe and the single relief pipe. The automatic brake valve is provided with a relief position, a braking position, a pressure holding position and an operating position. The automatic brake valve is located in different positions to control the braking, pressure holding and relief effects of the brake cylinder.

7. The simulation training device for the railway maintenance machinery braking system according to claim 5 is characterized in that: The common components also include a separate brake valve, which is arranged on the cabinet and connected to the main air duct and the action pipe. The separate brake valve is provided with a relief position, a neutral position and a braking position. The automatic brake valve is located in different positions to control the braking and relief effects of the brake cylinder.

8. The railway maintenance machinery braking system simulation training device according to claim 5 is characterized in that: Common components also include an emergency brake valve, which is installed on the cabinet. The emergency brake valve controls the air-controlled exhaust valve connected to the train pipe, and controls whether the brake cylinder is emergency-applied by opening and closing the air-controlled exhaust valve.

9. The railway maintenance machinery braking system simulation training device according to claim 1 is characterized in that: Both the YZ-1 braking system and the YZ-1G braking system are equipped with multiple air pressure transmitters. The pressure transmitters are electrically connected to the virtual teaching and training system so that the pressure changes in each connecting pipeline of the braking system can be fed back to the virtual teaching and training system in real time, and the braking system schematic diagram in the virtual teaching and training system can change dynamically in real time.

10. The railway maintenance machinery braking system simulation training device according to claim 1 is characterized in that: A display board is fixedly connected to the top surface of the display cabinet, the YZ-1 brake system is located on the display board, the YZ-1G brake system is located on the top surface of the display cabinet, and the main air cylinder is located at the bottom of the display cabinet.

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