Railway wagon single vehicle braking performance detection device, detection method and application thereof

Abstract

The application discloses a railway wagon single wagon brake performance detection device and a detection method and application thereof, and relates to the technical field of railway wagon brake performance detection devices.

Description

Technical Field

[0001] This invention belongs to the field of railway vehicle component testing technology, specifically relating to a testing device, testing method and application for the braking performance of a single railway freight car. Background Technology

[0002] The braking system is a critical system for the safe operation of railway freight cars. Before a vehicle is put into service, the braking system must undergo comprehensive testing and debugging to promptly eliminate faults and ensure the system reaches its optimal operating condition, guaranteeing its reliable performance. Current single-car braking performance testing devices are only suitable for testing the performance of single-tube braking systems conforming to national railway standards, and cannot be used for testing dual-tube braking systems conforming to AS standards. The railway freight car single-car braking performance testing device provided by this invention is specifically designed for testing the performance of single-car dual-tube braking systems with the WF5 valve as the core, conforming to AS standards. It is simple to manufacture, fully functional, easy to operate, safe, and reliable. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a railway freight car single-car braking performance testing device, its testing method, and its application. This device is suitable for testing the performance of a single car with a dual-tube braking system centered on a WF5 valve that conforms to AS standards. It has a simple structure, complete functions, is safe and reliable, and is easy to operate.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0005] A single-car braking performance testing device for railway freight cars includes a brake pipe system testing device and a main air duct system testing device connected in parallel. One end of the brake pipe system testing device is connected to a main air source, and the other end is connected to the brake pipe on the test car. One end of the main air duct system testing device is connected to the main air source, and the other end is connected to the main air duct on the test car.

[0006] Preferably, the main air source is equipped with a dust collection and filtration device on the main road leading to the brake pipe system detection device and the main air duct system detection device.

[0007] Preferably, the brake pipe system detection device includes a first branch, a first parallel three-branch located in the middle of the first branch, and a second parallel three-branch located at the end of the first branch. A pressure regulating valve is installed on the first branch. The first parallel three-branch is equipped with an inflation plug, a throttle valve, and a pressure gauge; the second parallel three-branch is equipped with an inflation plug; and the third parallel three-branch is equipped with a pressure regulating valve, an inflation check valve, and an inflation plug. The second parallel three-branch is equipped with an exhaust plug; the second parallel three-branch is equipped with an exhaust plug and a throttle valve; and the third parallel three-branch is equipped with a brake pipe connecting hose.

[0008] Preferably, the pressure regulating valve has a pressure regulating range of 0 to 550 kPa.

[0009] Preferably, the main duct system detection device includes a second branch, on which a pressure regulating valve, a throttle valve, an inflation plug, an exhaust plug, a pressure gauge, and a main duct connecting hose are connected in series along the inflation direction.

[0010] Preferably, the pressure regulating valve 2 has a pressure regulating range of 0 to 1100 kPa.

[0011] Application of a single-car braking performance testing device for railway freight cars in the testing of a dual-tube braking system based on WF5.

[0012] A testing method for a single-car braking performance testing device for railway freight cars includes:

[0013] Testing the rapid inflation and pressure holding function of the brake system: Compressed air from the main air source is filtered by a dust collection device and its pressure is adjusted to the required range by pressure regulating valve one. Inflation valve two is opened, and all other valves are closed. Compressed air is rapidly injected into the test vehicle through the brake pipe connecting hose, and the inflation pressure is measured by pressure gauge one. When inflation valve two is closed, the test vehicle is in a pressure holding state. The pressure drop of pressure gauge one is observed to detect any pressure holding leakage in the test vehicle. After the test vehicle applies the brakes, the rapid release function can be achieved by opening inflation valve two.

[0014] Testing of brake sensitivity, service braking, and vent valve stability in the brake system: Close all inflation valves, open vent valve two, and test brake sensitivity and service braking function according to relevant standards. After decompression, close vent valve two. The amount of decompression can be measured by observing the pressure drop of pressure gauge one. During the decompression test of brake sensitivity and service braking function, the vent valve does not operate, and the vent valve stability function can be tested simultaneously.

[0015] Testing the release sensitivity function of the brake system: Open the air inlet valve one, and compressed air is introduced into the test vehicle through the throttle valve one. The test vehicle must release within a specified time.

[0016] Testing the emergency braking and vent valve activation functions in the brake system: Open the exhaust valve, and the compressed air is quickly discharged to the atmosphere. The compressed air in the brake pipe drops rapidly to 0, and the test vehicle experiences emergency braking. At the same time, the vent valve is triggered to quickly discharge air and activate the vent valve.

[0017] Preferably, the testing of the air filling, pressure holding, and exhaust functions of the main air duct system is as follows: Open the air filling valve four and the exhaust valve three, and compressed air is filled into the main air duct system of the test vehicle through the main air duct connecting hose. After the air filling is sufficient, close the air filling valve four, and test the pressure holding performance of the main air duct system by observing the pressure drop of pressure gauge three; close the air filling valve four and open the exhaust valve three to remove the compressed air from the main air duct system.

[0018] Preferably, the test for cross-leakage between the brake pipe system and the main air duct system is as follows: the brake pipe system and the main air duct system of the test vehicle are independent of each other. The main air duct system only supplies air to the brake pipe system when the air pressure is insufficient. The two systems must not cross-leak when the pressure of either system drops to zero rapidly. After both systems are fully charged, the inflation valve four is closed and the exhaust valve three is opened to vent the compressed air from the main air duct system. After venting is completed, the exhaust valve three is closed, and the pressure gauge three is observed. The pressure of the gauge must not rise. The main air duct system is then recharged to a constant pressure. The exhaust valve one is opened to vent the compressed air from the brake pipe system, and the exhaust valve one is closed. The pressure gauge one is observed. The pressure of the gauge must not rise.

[0019] Compared with the prior art, the present invention has the following significant advantages:

[0020] This invention provides a testing device suitable for evaluating the performance of single-vehicle braking systems centered on the WF5 valve, conforming to AS standards. This testing device is simple and economical in structure, easy to manufacture, simple to install and debug, convenient to operate, safe and reliable, and well-suited for testing WF5-based dual-tube braking systems. The testing method is simple and effective, providing excellent verification of braking system performance. Attached Figure Description

[0021] Figure 1 This is a system block diagram of the railway freight car single-car braking performance testing device of the present invention;

[0022] Figure 2 This is a schematic diagram of the system structure connection of the railway freight car single-vehicle braking performance testing device of the present invention.

[0023] In the diagram: 1-Main air source; 2-Brake pipe system detection device; 21-First branch; 22-Pressure regulating valve one; 23-First parallel three-branch one; 231-Inflation plug one; 232-Throttle valve one; 233-Pressure gauge one; 24-First parallel three-branch two; 241-Inflation plug two; 25-First parallel three-branch three; 251-Pressure regulating valve three; 252-Inflation check valve; 253-Inflation plug three; 26-Second parallel three-branch one; 261-Exhaust plug Door 1; 27-Second parallel branch 3; 271-Exhaust plug door 2; 272-Throttle valve 2; 28-Second parallel branch 3; 281-Brake pipe connecting hose; 3-Main air duct system testing device; 31-Second branch; 311-Pressure regulating valve 2; 312-Throttle valve 3; 313-Inflation plug door 4; 314-Exhaust plug door 3; 315-Pressure gauge 3; 316-Main air duct connecting hose; 4-Main line; 41-Filter dust collection device; 5-Test vehicle. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of the present invention, preferred embodiments of the present invention are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting the present patent. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. For those skilled in the art, the omission of certain well-known structures and their descriptions in the drawings is understandable. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present patent.

[0025] The AS-compliant dual-pipe braking system, centered on the WF5 valve, is a compressed air-powered braking system that performs functions such as braking, emergency braking, release, pressure holding, staged braking, rapid release, and continuous air supply. The system consists of a main air duct system and a brake duct system. The brake duct system is the primary operating system, mainly responsible for braking, emergency braking, release, pressure holding, staged braking, and rapid release. The main air duct system is a supplementary system to the brake duct system, ensuring continuous air supply. This invention provides a railway freight car single-car braking performance testing device to test and adjust the functionality of this braking system, ensuring that vehicles equipped with this system are in optimal condition before being put into service.

[0026] like Figure 1As shown, this invention discloses a single-car braking performance testing device for railway freight cars, comprising a brake pipe system testing device 2 and a main air duct system testing device 3 connected in parallel. One end of the brake pipe system testing device 2 is connected to the main air source 1, and the other end is connected to the brake pipe on the test vehicle 5. One end of the main air duct system testing device 3 is connected to the main air source 1, and the other end is connected to the main air duct on the test vehicle 5. The brake pipe system testing device 2 is the main testing device connected to the brake pipe on the vehicle, primarily used to test the brake pipe system's rapid air filling, pressure holding, braking sensitivity, release sensitivity, emergency braking, vent valve stability, vent valve activation performance, and ROT (Return on Threat) function. The main air duct system testing device 3 is connected to the main air duct on the vehicle, primarily used to test the main air duct system's air filling, pressure holding, and venting functions. The parallel connection of the brake pipe system testing device 2 and the main air duct system testing device 3 works together to primarily test the cross-leakage function between the two systems.

[0027] The brake pipe system testing device 2 and the main air duct system testing device 3 are connected in parallel. In order to purify the compressed air entering the two devices, the main air source 1 is equipped with a filter dust collection device 41 on the main road 4 leading to the brake pipe system testing device 2 and the main air duct system testing device 3.

[0028] The brake pipe system and main air duct system of the test vehicle 5 have different pressure settings. The brake pipe system test device 2 and the main air duct system test device 3 are each equipped with a pressure regulating valve 22 and a pressure regulating valve 311. The pressure regulating range of the pressure regulating valve 22 in the brake pipe system test device 2 is 0 to 550 kPa, and the pressure regulating range of the pressure regulating valve 311 in the main air duct system test device 3 is 0 to 1100 kPa.

[0029] like Figure 2As shown, the brake pipe system detection device 2 adjusts the pressure to the required range through the pressure regulating valve 22 and then divides the air circuit into three parallel pipelines: slow charging, fast charging, and ROT. After being connected in parallel, they merge back into three parallel pipelines: fast discharge, slow discharge, and air charging pipeline. During operation, the detection objectives are achieved by opening and closing the plug valve. The specific structure and connection method are as follows: The brake pipe system detection device 2 includes a first branch 21, a first parallel three-branch located in the middle of the first branch 21, and a second parallel three-branch located at the end of the first branch 21. A pressure regulating valve 22 is installed on the first branch 21. The first parallel three-branch 23 is equipped with an inflation plug 231, a throttle valve 232, and a pressure gauge 233. The first parallel three-branch 24 is equipped with an inflation plug 241. The first parallel three-branch 25 is equipped with a pressure regulating valve 251, an inflation check valve 252, and an inflation plug 253. The second parallel three-branch 26 is equipped with an exhaust plug 261. The second parallel three-branch 27 is equipped with an exhaust plug 271 and a throttle valve 272. The second parallel three-branch 28 is equipped with a brake pipe connecting hose 281. The brake pipe connecting hose 281 has an FP3 connector, which is the same as the brake pipe system hose connector of the test vehicle 5. The slow charging line includes an inflation plug 231, a throttle valve 232, and a pressure gauge 233; the fast charging line includes an inflation plug 241; the ROT function line includes a pressure regulating valve 251, an inflation check valve 252, and an inflation plug 253; the fast exhaust line includes an exhaust plug 261; and the slow exhaust line includes an exhaust plug 271 and a throttle valve 272.

[0030] like Figure 2 As shown, the main air duct system testing device 3 includes a second branch 31. Along the inflation direction, the second branch 31 is connected in series with a pressure regulating valve 311, a throttle valve 312, an inflation plug 313, an exhaust plug 314, a pressure gauge 315, and a main air duct connecting hose 316. The connector type of the main air duct connecting hose 316 is FP5, which is the same as the connector of the main air duct system hose of the test vehicle 5.

[0031] Based on the above structure, the present invention provides a testing method for a railway freight car single-car braking performance testing device, comprising:

[0032] Testing of the rapid inflation and pressure holding function in the brake system: Compressed air from the main air source 1 is filtered by the dust collection device 41 and adjusted to the required range by the pressure regulating valve 22. The inflation valve 241 is opened and all other valves are closed. Compressed air is rapidly injected into the test vehicle 5 through the brake pipe connecting hose 281. The inflation pressure is measured by the pressure gauge 233. When the inflation valve 241 is closed, the test vehicle 5 is in a pressure holding state. The pressure drop of the pressure gauge 233 is observed to detect the pressure holding leakage of the test vehicle 5. After the test vehicle 5 is braked, the rapid release function can be achieved by opening the inflation valve 241.

[0033] Testing of brake sensitivity, service braking, and vent valve stability in the brake system: The decompression rate of brake sensitivity and service braking must meet relevant standards and be achieved through a slow-release pipeline. At this decompression rate, the vent valve must not actuate, thus allowing for simultaneous testing of vent valve stability. A throttle valve 272 is installed on the slow-release pipeline, with an orifice diameter that meets relevant standards and is adjustable to accommodate different vehicle requirements. The specific testing process is as follows: Close all inflation valves, open exhaust valve 271, and decompress according to relevant standards to test brake sensitivity and service braking functionality. After decompression, close exhaust valve 271. The decompression amount can be measured by observing the pressure drop on pressure gauge 233. During the decompression testing of brake sensitivity and service braking, the vent valve does not actuate, allowing for simultaneous testing of vent valve stability.

[0034] Testing the brake release sensitivity function in the brake system: The inflation rate of the release sensitivity must meet the relevant standard requirements, achieved through the inflation and deflation lines. A throttle valve 232 is installed on the slow deflation line, with an adjustable orifice diameter that meets the relevant standard requirements to accommodate vehicles with different needs. The specific testing process is as follows: Open the inflation valve 231, and compressed air is injected into the test vehicle 5 through the throttle valve 232. The test vehicle 5 must release within a specified time.

[0035] Testing of emergency braking and vent valve activation functions in the brake system: Both emergency braking and vent valve activation require a high decompression rate, therefore the quick exhaust line only includes exhaust plug valve 261. The specific testing process is as follows: Open exhaust plug valve 261, compressed air is quickly discharged to the atmosphere, the compressed air in the brake line drops rapidly to 0, the test vehicle 5 experiences emergency braking, and at the same time triggers the vent valve to quickly exhaust air and activate the vent valve.

[0036] Testing of the air filling, pressure holding, and exhaust functions in the main air duct system: The pressure setting of the main air duct system differs from that of the brake pipe system, therefore a separate pressure regulating valve must be installed to adjust the pressure to the rated pressure. The main air duct system is a continuously inflated system, and the test vehicle 5 is always in an inflated state during operation. Its inflation rate must meet the relevant standard requirements. A throttle valve 312 is installed to control the inflation rate within the standard range. The specific testing process is as follows: Open the inflation plug 4 313 and the exhaust plug 3 314. Compressed air is injected into the main air duct system of the test vehicle 5 through the main air duct connecting hose 316. After sufficient inflation, close the inflation plug 4 313. The pressure holding performance of the main air duct system is tested by observing the pressure drop of pressure gauge 315. Close the inflation plug 4 313 and open the exhaust plug 3 314 to expel the compressed air from the main air duct system.

[0037] Testing for cross-leakage between the brake pipe system and the main air duct system: The brake pipe system and the main air duct system of the test vehicle 5 are independent of each other. The main air duct system only supplies air to the brake pipe system when the air pressure is insufficient. The two systems must not cross-leak when the pressure of either system drops to zero rapidly. After both systems are fully charged, close the inflation valve 4 313 and open the exhaust valve 3 314 to vent the compressed air from the main air duct system. After venting, close the exhaust valve 3 314 and observe the pressure gauge 3 315. The pressure should not rise. Recharge the main air duct system to the set pressure, open the exhaust valve 1 261 to vent the compressed air from the brake pipe system, and close the exhaust valve 1 261. Observe the pressure gauge 1 233. The pressure should not rise.

[0038] The testing device and method of this invention require only a main air source to complete the test, making it suitable for the harsh operating environment of railway freight cars. Each pressure regulating valve corresponds one-to-one with the system requirements, meeting Aurizon's corporate standards. Each throttling valve also corresponds one-to-one with the system requirements, and its throttling orifice diameter is adjustable, adapting to the testing needs of freight cars with various throttling orifice diameters.

[0039] Based on the description and accompanying drawings of this invention, those skilled in the art can easily manufacture or use the railway freight car single-car braking performance testing device, its testing method, and its application, and can achieve the positive effects described in this invention.

[0040] Unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A device for testing the braking performance of a single railway freight car, characterized in that, It includes a parallel brake pipe system testing device (2) and a main air duct system testing device (3). One end of the brake pipe system testing device (2) is connected to the main air source (1), and the other end is connected to the brake pipe on the test vehicle (5). One end of the main air duct system testing device (3) is connected to the main air source (1), and the other end is connected to the main air duct on the test vehicle (5). The brake pipe system detection device (2) includes a first branch (21), a first parallel three-branch located in the middle of the first branch (21), and a second parallel three-branch located at the end of the first branch (21). A pressure regulating valve (22) is provided on the first branch (21). The first parallel three-branch (23) is equipped with an inflation plug (231), a throttle valve (232), and a pressure gauge (233). The second parallel three-branch (24) is also equipped with an inflation plug (231), a throttle valve (232), and a pressure gauge (233). The first parallel three-branch three (25) is equipped with an inflation plug valve 2 (241), an inflation check valve 3 (251), an inflation plug valve 2 (252), and an inflation plug valve 3 (253); the second parallel three-branch one (26) is equipped with an exhaust plug valve 1 (261), the second parallel three-branch two (27) is equipped with an exhaust plug valve 2 (271) and a throttle valve 2 (272), and the second parallel three-branch three (28) is equipped with a brake pipe connecting hose (281); The main air duct system detection device (3) includes a second branch (31), on which a pressure regulating valve (311), a throttle valve (312), an inflation plug (313), an exhaust plug (314), a pressure gauge (315), and a main air duct connecting hose (316) are connected in series along the inflation direction.

2. The railway freight car single-car braking performance testing device according to claim 1, characterized in that: The main air source (1) is equipped with a dust collection device (41) on the main road (4) leading to the brake pipe system detection device (2) and the main air duct system detection device (3).

3. The railway freight car single-car braking performance testing device according to claim 1, characterized in that: The pressure regulating valve (22) has a pressure regulating range of 0 to 550 kPa.

4. The railway freight car single-car braking performance testing device according to claim 1, characterized in that: The pressure regulating valve 2 (311) has a pressure regulating range of 0 to 1100 kPa.

5. The application of a railway freight car single-car braking performance testing device as described in any one of claims 1-4 in the testing of a dual-tube braking system based on WF5.

6. A testing method for a railway freight car single-car braking performance testing device as described in any one of claims 1-4, characterized in that, include: Test of the rapid inflation and pressure holding function in the brake pipe system: The compressed air from the main air source (1) is filtered by the dust collection device (41), and the pressure is adjusted to the required range by the pressure regulating valve (22). The inflation plug (241) is opened and all other plugs are closed. The compressed air is rapidly inflated into the test vehicle (5) through the brake pipe connecting hose (281). The inflation pressure is measured by the pressure gauge (233). When the inflation plug (241) is closed, the test vehicle (5) is in a pressure holding state. The pressure drop of the pressure gauge (233) is observed to detect the pressure holding leakage of the test vehicle (5). After the test vehicle (5) applies the brakes, the rapid release function can be achieved by opening the inflation plug (241). Testing of brake sensitivity, service braking, and vent valve stability in the brake system: Close all inflation valves, open vent valve two (271), and test brake sensitivity and service braking function according to relevant standards. After decompression, close vent valve two (271). The amount of decompression can be measured by observing the pressure drop of pressure gauge one (233). During the decompression test of brake sensitivity and service braking function, the vent valve does not operate, and the vent valve stability function can be tested at the same time. Test of the release sensitivity function in the brake system: Open the air valve (231), and compressed air is injected into the test vehicle (5) through the throttle valve (232). The test vehicle (5) must release within a specified time. Test of emergency braking and vent valve activation function in brake pipe system: Open exhaust plug valve 1 (261), compressed air is quickly discharged to the atmosphere, compressed air in brake pipe drops to 0 quickly, test vehicle (5) generates emergency braking, and at the same time triggers vent valve to quickly discharge air and activate vent valve.

7. The testing method of the railway freight car single-car braking performance testing device according to claim 6, characterized in that, include: Testing of the air filling, pressure holding, and exhaust functions in the main air duct system: Open the air filling plug four (313) and the exhaust plug three (314), and compressed air is filled into the main air duct system of the test vehicle (5) through the main air duct connecting hose (316). After the air filling is sufficient, close the air filling plug four (313), and test the pressure holding performance of the main air duct system by observing the pressure drop of pressure gauge three (315); close the air filling plug four (313) and open the exhaust plug three (314) to remove the compressed air from the main air duct system.

8. The testing method of the railway freight car single-car braking performance testing device according to claim 6, characterized in that, include: Test of cross-leakage function between brake pipe system and main air pipe system: The brake pipe system and main air pipe system of the test vehicle (5) are independent of each other. The main air pipe system only supplements air to the brake pipe system when the air pressure of the brake pipe system is insufficient. When the pressure of either system drops to zero quickly, the two systems cannot cross-leak. After the two systems are fully charged, close the charging plug valve four (313), open the exhaust plug valve three (314), and empty the compressed air of the main air pipe system. After the exhaust is completed, close the exhaust plug valve three (314) and observe the pressure gauge three (315). Its pressure should not rise. Recharge the main air pipe system to the constant pressure, open the exhaust plug valve one (261), empty the compressed air of the brake pipe system, and close the exhaust plug valve one (261). Observe the pressure gauge one (233). Its pressure should not rise.

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