Bogie-based brake testing apparatus

Abstract

The utility model discloses a bogie basis brake test equipment, including operation box, install the gas source master switch of operation box surface, the frequently used function test subassembly and the parking brake and flange lubrication function test subassembly, the frequently used function test subassembly includes the frequently used brake pressure regulating valve, the frequently used brake pressure gauge, the frequently used brake handle, the frequently used fast discharge handle, the frequently used slow discharge handle and the frequently used flow valve, the parking brake and flange lubrication function test subassembly includes the parking brake pressure regulating valve, the parking brake pressure gauge, the parking / WFA handle, the parking brake handle, the parking fast discharge handle, the parking slow discharge handle, the parking flow valve and the WFA handle, connect with the bogie use air pipe of operation box, simulate train air brake application mode and train overall brake loop, through the inflation and deflation of control application air pressure and to brake pipeline, thereby realize the function of brake unit test and brake pipeline air tightness test.

Description

Technical Field

[0001] This utility model relates to a basic braking test device, and more particularly to a basic braking test device for the bogie of a subway train, belonging to the field of rail transit vehicle technology. Background Technology

[0002] Firstly, the braking systems of existing subway train bogies generally employ a hybrid electro-pneumatic braking system. The air braking unit uses a purely mechanical structure. Its principle is that the force generated by air input is mechanically transmitted. When air pressure is applied to the brake cylinder, a wedge-shaped component moves downward, pushing the main shaft of the clearance adjuster forward, which in turn pushes the brake shoe, generating braking force on the train. However, this mechanical structure often faces problems such as air leakage, insufficient braking force, and inability to release the brakes. These problems can lead to insufficient braking force or brake failure in running trains, posing a serious threat to train safety and even causing operational delays. For example, leaks in the brake lines can cause increased braking distance and trains exceeding the standard stopping distance at stations. Insufficient braking force can also lead to low-speed train collisions and injuries.

[0003] Secondly, the maintenance of the bogie's braking system faces numerous challenges during later maintenance. Since the bogie cannot independently test the functionality of its braking unit, or the integrity of its braking force, braking lines, and airtightness, the bogie must first be installed on the vehicle, and then the braking system must be tested using the vehicle's overall circuit. If the test results are unsatisfactory, the entire bogie must be disassembled for thorough troubleshooting until all tests are passed. This process is not only cumbersome but also inefficient.

[0004] Furthermore, the current bogie basic braking test equipment on the market is expensive, and its interface is difficult to match with the existing bogie interface, which further increases the difficulty and cost of maintenance.

[0005] Therefore, there is an urgent need to design a new type of testing equipment for the bogie foundation braking of subway trains. Summary of the Invention

[0006] To address the aforementioned technical problems, this utility model provides a bogie basic braking test device, which reduces the time and material resources consumed by repeatedly disassembling and assembling the bogie after discovering faults through overall vehicle loop testing.

[0007] To achieve the above-mentioned technical objectives, this utility model provides a bogie basic braking test device, including an operation box, a main air source switch mounted on the surface of the operation box, a common function test component, and a parking brake and wheel flange lubrication function test component; and an external air source is connected to the common function test component and the parking brake and wheel flange lubrication function test component respectively through an air pipe and the main air source switch.

[0008] The commonly used functional test components include a commonly used brake pressure regulating valve, a commonly used brake pressure gauge, a commonly used brake handle, a commonly used fast discharge handle, a commonly used slow discharge handle, and a commonly used flow valve. Furthermore, the main air supply switch is connected in sequence via air pipes to the service brake pressure regulating valve, service brake handle, service quick release handle, service slow release handle, and service brake cylinders one and two of the bogie; the service brake pressure regulating valve is also connected via air pipes to the service brake pressure gauge; and the service slow release handle is also connected via air pipes to the service flow valve.

[0009] The parking brake and wheel flange lubrication function test assembly includes a parking brake pressure regulating valve, a parking brake pressure gauge, a parking / WFA handle, a parking brake handle, a parking fast discharge handle, a parking slow discharge handle, a parking flow valve, and a WFA handle. Furthermore, the main air supply switch is connected in sequence to the parking brake pressure regulating valve and the parking / WFA handle via air pipes; the parking / WFA handle is connected to the parking brake handle and the WFA handle via air pipes; the parking brake handle is connected in sequence to the parking quick-release handle, the parking slow-release handle, and the parking brake cylinder of the bogie via air pipes; the WFA handle is connected to the wheel flange lubricator of the bogie via air pipes; the parking brake pressure regulating valve is also connected to the parking brake pressure gauge via air pipes; and the parking slow-release handle is also connected to the parking flow valve via air pipes.

[0010] Furthermore, the bogie's service brake cylinder is equipped with a service brake air source interface.

[0011] Furthermore, the bogie's parking brake cylinder is equipped with a parking brake air source interface.

[0012] Furthermore, the wheel flange lubricator of the bogie is provided with a wheel flange lubrication air source interface.

[0013] Furthermore, the bottom of the control box is equipped with several wheels.

[0014] The working principle of this utility model is as follows: the control box is connected to the bogie using an air pipe to simulate the air brake application method and the overall braking circuit of the train. The control box controls the air pressure applied to the bogie and the inflation and deflation of the brake line, thereby realizing the functions of testing the braking unit of the bogie and the air tightness of the brake line.

[0015] Specifically, opening the service brake handle inflates the service brake cylinders one and two of the bogie braking unit, causing the air pressure to push the brake shoe holders into contact with the wheelsets, thus applying service braking force to the train. Closing the service brake handle stops air intake, at which point a sealing performance test can be performed. Conversely, closing the service brake handle and opening the service quick-release handle causes the service brake cylinders one and two to release air, thus reducing the service braking force on the train.

[0016] When the parking brake handle is opened, air pressure is generated in the parking brake cylinder of the bogie braking unit. The air pressure pushes the piston rod to overcome the spring force of the parking brake cylinder, causing the brake shoe to disengage from the wheelset and relieving the braking force on the train. When the parking brake handle is closed, air intake stops, and a sealing performance test can be performed at this time. When the parking brake handle is closed, the parking quick-release handle is opened, at which point the parking brake cylinder is vented, and the braking force on the train is applied.

[0017] Opening the WFA handle allows external air to flow to the bogie's flange lubricator, causing the flange lubricator to spray flange lubricating oil evenly. At this point, the flange lubrication function can be tested.

[0018] In summary, this utility model enables effective testing of the bogie's braking unit during bogie maintenance and has the following technical advantages: (1) This utility model can test multiple braking modes (common braking and parking braking), and is integrated into one unit. It is simple to operate and easy to use.

[0019] (2) Compared with the previous method of repeatedly disassembling and assembling the bogie after discovering the fault through the overall loop test of the vehicle, this utility model significantly reduces the time and material resources consumed.

[0020] (3) This utility model not only improves the quality and efficiency of maintenance work, but also effectively reduces the serious consequences that may be caused by braking system problems on the main line. It also prevents problems such as increased braking distance and excessive stopping distance of trains at stations caused by leakage of brake lines. Furthermore, it avoids situations such as low-speed train collisions and casualties caused by insufficient braking force in extreme cases. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the gas path of this utility model; In the diagram: 1. Control box, 2. Bogie, 21. Service brake cylinder one, 22. Service brake cylinder two, 23. Parking brake cylinder, 24. Wheel flange lubricator. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] It should be noted that this utility model is a basic braking test device specifically designed for the bogie 2 of a subway train. For example... Figure 1 As shown, the existing bogie 2 mainly consists of a frame, common brake cylinders 21 and 22, parking brake cylinder 23, and wheel flange lubricator 24. Furthermore, this invention tests the performance of the common brake cylinders 21 and 22, the parking brake cylinder 23, and the wheel flange lubricator 24.

[0024] like Figure 1 , Figure 2 As shown, this utility model includes an operation box 1, a main air supply switch mounted on the surface of the operation box 1, a common function testing component, and a parking brake and wheel flange lubrication function testing component. Furthermore, an external air source is connected to the air inlet of the main air supply switch via an air pipe, and the air outlet of the main air supply switch is connected to the common function testing component and the parking brake and wheel flange lubrication function testing component via air pipes, as detailed below.

[0025] The commonly used function test components include a commonly used brake pressure regulating valve, a commonly used brake pressure gauge, a commonly used brake handle, a commonly used fast discharge handle, a commonly used slow discharge handle, and a commonly used flow valve, all mounted on the surface of the control box 1.

[0026] Furthermore, the outlet of the main air supply switch is connected to the inlet of the service brake pressure regulating valve via an air pipe; the outlet of the service brake pressure regulating valve is connected to the inlet of the service brake handle via an air pipe; in addition, the outlet of the service brake pressure regulating valve is also connected to the service brake pressure gauge via an air pipe. The outlet of the service brake handle is connected to the service brake cylinders 21 and 22 of bogie 2 via an air pipe, and a service quick-release handle and a service slow-release handle are sequentially connected to the air pipe between the service brake handle and the service brake cylinders 21 and 22. Furthermore, the service slow-release handle is also connected to the service flow valve via an air pipe.

[0027] In specific implementation, the commonly used function testing component can perform commonly used function tests, and the process is as follows: First, the external air source is connected to the commonly used brake pressure regulating valve through the main air source switch. The air pressure of the air source is regulated to the commonly used brake working pressure through the commonly used brake pressure regulating valve, and the pressure value is displayed through the commonly used brake pressure gauge. Then, the regulated air source is connected to the commonly used brake handle. The supply and cut-off of the commonly used brake air source are realized by opening and closing the commonly used brake handle. Next, the gas after passing through the service brake handle is connected to the service brake cylinders 1 and 21 and 22 of bogie 2, and the following two air paths are used: First, a service quick exhaust handle is connected between the service brake handle and the service brake cylinders 1 and 21 and 22 to achieve rapid exhaust of the service brake cylinders 1 and 21 and 22 for testing the normal operation function of the service brake; Second, a combination of a service slow exhaust handle and a service flow valve is connected between the service brake handle and the service brake cylinders 1 and 21 and 22 to achieve slow exhaust of the service brake cylinders 1 and 21 and 22, thereby achieving flow-limited exhaust for monitoring critical point operation and smooth operation.

[0028] The parking brake and wheel flange lubrication function test assembly includes a parking brake pressure regulating valve, a parking brake pressure gauge, a parking / WFA (wheel flange lubricator 24) handle, a parking brake handle, a parking fast discharge handle, a parking slow discharge handle, a parking flow valve, and a WFA (wheel flange lubricator 24) handle, all mounted on the surface of the control box 1.

[0029] Furthermore, the air outlet of the main air supply switch is connected to the air inlet of the parking brake pressure regulating valve via an air pipe; the air outlet of the parking brake pressure regulating valve is connected to the air inlet of the parking / WFA handle via an air pipe; in addition, the air outlet of the parking brake pressure regulating valve is also connected to the parking brake pressure gauge via an air pipe. The air outlet of the parking / WFA handle is connected to the air inlets of the parking brake handle and the WFA handle via air pipes. The air outlet of the parking brake handle is connected to the parking brake cylinder 23 of the bogie 2 via an air pipe, and the parking quick-release handle and the parking slow-release handle are also connected sequentially on the air pipe between the parking brake handle and the parking brake cylinder 23; in addition, the parking slow-release handle is also connected to the parking flow valve via an air pipe. The air outlet of the WFA handle is connected to the wheel flange lubricator 24 of the bogie 2 via an air pipe.

[0030] In specific implementation, the parking brake and wheel flange lubrication function test component can perform parking and WFA function tests. The process is as follows: First, the external air source is connected to the parking brake pressure regulating valve through the main air source switch. The air pressure of the air source is adjusted to the working pressure of parking brake and wheel flange lubrication through the parking brake pressure regulating valve, and the pressure is displayed through the parking brake pressure gauge. Then, the pressure-regulated air source is connected to the parking / WFA handle and divided into two parts: one part of the air source is connected to the parking brake handle, and the supply and cut-off of the parking brake air source are realized by opening and closing the parking brake handle. Next, the gas passing through the parking brake handle is introduced into the parking brake cylinder 23 of the bogie 2, employing two air paths: First, a quick-release handle is connected between the parking brake handle and the parking brake cylinder 23, enabling rapid venting of the parking brake cylinder 23 for testing its normal operation; second, a combination of a slow-release handle and a parking flow valve is connected between the parking brake handle and the parking brake cylinder 23, enabling slow venting of the parking brake cylinder 23 for flow-limited venting to monitor critical point operation and operational smoothness. The remaining gas source leads to the WFA handle, and then through the WFA handle to the wheel flange lubricator 24 of the bogie 2, thus testing the wheel flange lubrication function.

[0031] As can be seen from the above technical solutions, this utility model integrates multiple functional tests into one unit, including not only common function test components but also parking brake and wheel flange lubrication function test components. It can be used to test various braking modes (common braking and parking brake) and wheel flange lubrication function, and is simple to operate and convenient to use. Furthermore, this utility model is equipped with two independent precision air pressure gauges, namely a common braking pressure gauge and a parking brake pressure gauge, which can be used to observe and calculate the real-time air pressure of the pipeline. This utility model also includes two independent pressure regulators, namely a common braking pressure regulating valve and a parking brake pressure regulating valve, which can be used for convenient air pressure adjustment.

[0032] In other embodiments, the service brake cylinders 1 and 21 and 22 of the bogie 2 are provided with service brake air source interfaces for connecting the service brake handle through an air pipe, and a service quick-release handle, as well as a combination of a service slow-release handle and a service flow valve are installed on the air pipe.

[0033] In other embodiments, the parking brake cylinder 23 of the bogie 2 is provided with a parking brake air source interface for connecting the parking brake handle through an air pipe, and a parking quick-release handle, as well as a combination of a parking slow-release handle and a parking flow valve are installed on the air pipe.

[0034] In other embodiments, the wheel flange lubricator 24 of the bogie 2 is provided with a wheel flange lubrication air source interface for connecting to the WFA handle via an air pipe.

[0035] In other embodiments, the bottom of the operating box 1 is equipped with several wheels for easy movement.

[0036] As can be seen from the above technical solution, this utility model simulates the air brake application method and the overall braking circuit of the train. By controlling the applied air pressure and the inflation and deflation of the brake lines, it enables the testing of the braking unit, the airtightness of the brake lines, and the function testing of the wheel flange lubricator 24 on the bogie 2. The details are as follows: (1) The working process of this utility model for common function testing is as follows: First, connect the external air source. The external air source is connected to the common brake pressure regulating valve through the external air source main switch. By adjusting the common brake pressure regulating valve, the air pressure of the external air source is adjusted to the pressure value displayed by the common brake pressure gauge as 4.3±0.2 bar (i.e., common brake working pressure).

[0037] Then, open the service brake handle. External air, after pressure adjustment, is supplied to service brake cylinders 21 and 22 of bogie 2. At this time, air pressure is generated in service brake cylinders 21 and 22 of bogie 2, pushing the service brake shoe holders to contact the wheelset, thus applying service braking force to bogie 2. Next, close the service brake handle and operate the service quick-release handle to bleed air. At this time, air begins to be released from service brake cylinders 21 and 22 of bogie 2, causing the service brake shoe holders to disengage from the wheelset, thereby relieving the service braking force on bogie 2. Afterwards, close the service quick-release handle and open and close the service brake handle once to allow service brake cylinders 21 and 22 of bogie 2 to accumulate air. Then, open the service slow-release handle and adjust the service flow regulating valve to slowly bleed air, causing the service brake shoes to slowly contract until all air in service brake cylinders 21 and 22 is released, and the brake shoes are fully released. At this point, close the service slow-release handle.

[0038] Finally, open the service brake handle again to allow the service brake cylinders 21 and 22 of bogie 2 to charge again. Once the pressure stabilizes, close the service brake handle and perform maintenance on the service brake lines. If the pressure drops by less than 0.2 bar after 5 minutes, it indicates that the service brake lines of bogie 2 have good sealing performance.

[0039] (2) The working process of the parking function test of this utility model is as follows: First, connect the external air source. The external air source is connected to the parking brake pressure regulating valve through the external air source main switch. Adjust the air pressure of the external air source to the pressure value displayed by the parking brake pressure gauge (6.5±0.2 bar, i.e. parking brake working pressure) by adjusting the parking brake pressure regulating valve.

[0040] Then, open the parking / WFA handle, and then open the parking brake handle. At this time, the parking brake cylinder 23 of bogie 2 is filled with air pressure. The air pressure pushes the piston rod to overcome the spring force of the parking brake cylinder 23, causing the parking brake shoe to disengage from the wheelset, thereby relieving the parking braking force on bogie 2. Next, close the parking brake handle and operate the parking quick release handle. At this time, the parking brake cylinder 23 of bogie 2 begins to depressurize, causing the spring in the parking brake cylinder 23 to push the parking brake shoe to contact the wheelset, thereby applying parking brake to bogie 2. After that, close the parking brake quick release handle and open and close the parking brake handle once to allow the parking brake cylinder 23 to fill with air. Then, open the parking slow release handle and adjust the parking flow regulating valve to slowly release air. At this time, the parking brake shoes begin to slowly apply braking force to the wheelset until all the air in the parking brake cylinder 23 is released and the parking brake shoes fully apply braking force to the wheelset. At this time, close the parking brake slow release handle.

[0041] Finally, open the parking brake handle again to allow the parking brake cylinder 23 of bogie 2 to charge again. Once the pressure stabilizes, close the parking brake handle and perform maintenance on the parking brake line. If the pressure drops by less than 0.2 bar after 5 minutes, it indicates that the parking brake line of bogie 2 has good sealing performance.

[0042] (3) The working process of WFA (wheel flange lubrication) function test of this utility model is as follows: First, connect the external air source. The external air source is connected to the parking brake pressure regulating valve through the external air source main switch. Adjust the air pressure of the external air source to the pressure value displayed by the parking brake pressure gauge (6.5±0.2 bar, i.e. wheel flange lubrication working pressure) by adjusting the parking brake pressure regulating valve.

[0043] Then, open the parking / WFA handle, and then open the WFA handle. The external air source is connected to the wheel flange lubricator 24 of the bogie 2, so that the wheel flange lubricator 24 starts to spray wheel flange lubricating oil evenly, thereby realizing the wheel flange lubrication function test.

[0044] In summary, this invention enables effective braking unit testing during bogie 2 maintenance, significantly reducing the time and material resources previously required for repeated disassembly and reassembly of bogie 2 after faults were detected through overall vehicle loop testing. This improvement not only enhances the quality and efficiency of maintenance work but also effectively reduces the potential serious consequences of braking system problems on the mainline.

[0045] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, based on the ideas of this utility model, modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the ideas and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A bogie foundation braking test device, characterized in that, It includes an operating box, a main air supply switch mounted on the surface of the operating box, a common function test assembly, and a parking brake and wheel flange lubrication function test assembly; and an external air source is connected to the common function test assembly and the parking brake and wheel flange lubrication function test assembly respectively through an air pipe and the main air supply switch. The commonly used functional test components include a commonly used brake pressure regulating valve, a commonly used brake pressure gauge, a commonly used brake handle, a commonly used fast discharge handle, a commonly used slow discharge handle, and a commonly used flow valve. Furthermore, the main air supply switch is connected in sequence via air pipes to the service brake pressure regulating valve, service brake handle, service quick release handle, service slow release handle, and service brake cylinders one and two of the bogie; the service brake pressure regulating valve is also connected via air pipes to the service brake pressure gauge; the service slow release handle is also connected via air pipes to the service flow valve. The parking brake and wheel flange lubrication function test assembly includes a parking brake pressure regulating valve, a parking brake pressure gauge, a parking / WFA handle, a parking brake handle, a parking fast discharge handle, a parking slow discharge handle, a parking flow valve, and a WFA handle. Furthermore, the main air supply switch is connected in sequence to the parking brake pressure regulating valve and the parking / WFA handle via air pipes; the parking / WFA handle is connected to the parking brake handle and the WFA handle via air pipes; the parking brake handle is connected in sequence to the parking quick-release handle, the parking slow-release handle, and the parking brake cylinder of the bogie via air pipes; the WFA handle is connected to the wheel flange lubricator of the bogie via air pipes; the parking brake pressure regulating valve is also connected to the parking brake pressure gauge via air pipes; and the parking slow-release handle is also connected to the parking flow valve via air pipes.

2. The bogie foundation braking test equipment according to claim 1, characterized in that, The bogie's service brake cylinder is equipped with a service brake air source interface.

3. The bogie foundation braking test equipment according to claim 1, characterized in that, The bogie's parking brake cylinder is equipped with a parking brake air source interface.

4. The bogie foundation braking test equipment according to claim 1, characterized in that, The bogie's rim lubricator is equipped with a rim lubrication air source interface.

5. A bogie foundation braking test device according to any one of claims 1-4, characterized in that, The bottom of the control box is equipped with several wheels.

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