Single truck tester with brake cylinder quick-charging and quick-discharging functions and test method thereof

Abstract

The invention belongs to the technical field of single-vehicle testers, and particularly relates to a truck single-vehicle tester with a brake cylinder quick-charging and quick-discharging function and a test method of the truck single-vehicle tester. According to the technical scheme, the truck single-vehicle tester with the brake cylinder quick-charging and quick-discharging functions comprises a main blast pipe, the tail end of the main blast pipe is connected with a brake pipe, the other end of the brake pipe is connected with a tested vehicle or a functional air cylinder, the tested vehicle is connected with the brake cylinder, the main blast pipe is connected with a quick air pipe, and the other end of the quick air pipe is connected with the brake cylinder; the main air pipe is connected with a main air ball valve and a brake inflation valve group, the brake inflation valve group is connected with a brake pipe, and the brake pipe is connected with a brake exhaust valve group; the quick air pipe is connected with a brake cylinder inflation electromagnetic valve and further connected with a brake cylinder exhaust electromagnetic valve through a pipeline. The invention provides a single truck tester with a brake cylinder quick-charging and quick-discharging function and a test method of the single truck tester.

Description

Technical Field

[0001] The present invention belongs to the technical field of bicycle testers, and particularly relates to a freight car single bicycle tester with a function of fast charging and fast discharging of a brake cylinder and a test method thereof. Background Art

[0002] At present, when newly manufactured, repaired temporarily, repaired in sections, and repaired in factories, railway freight cars will all use a single bicycle tester to conduct single bicycle performance tests on the vehicle brake according to the "Test Method for Single Bicycles with a Constant Pressure of 600 kPa for Railway Freight Cars (Trial)". The test items include nine major items: ball passing test, leakage test, braking and release sensitivity test, 120 / 120-1 type brake accelerator release valve test, 120 / 120-1 type brake semi-automatic release valve main valve release test, emergency braking test, and 120 / 120-1 type brake semi-automatic release valve brake cylinder release test, common braking stability and empty / loaded vehicle automatic adjustment device empty position test, empty / loaded vehicle automatic adjustment device semi-heavy vehicle and heavy vehicle position performance test, brake adjuster performance test. The performance of the vehicle brake is comprehensively detected, and the vehicle can be delivered for use only after passing the test.

[0003] As Figure 2 shown, existing single bicycle testers usually adopt microcomputer control and can automatically conduct performance tests on vehicles according to the test method. The main components include: pressure reducing valve, solenoid valve, hose connector, brake pipe sensor, brake cylinder sensor, function air cylinder and other components. The solenoid valves are all used to inflate or exhaust the brake pipe, control the pressure change of the brake pipe, and use the pressure values collected by the brake pipe sensor and the brake cylinder sensor to realize the performance detection of the vehicle brake.

[0004] Currently, domestic freight car single bicycle testers usually externally connect a hose connector with an inner diameter of 1.5 m to 2 m in length, and adjust the test air pressure to the rated pressure (600 kPa). During the brake cylinder inflation test, the first-position solenoid valve is used to inflate. After the auxiliary air cylinder is filled to the rated pressure, the fourth-position, fifth-position or sixth-position solenoid valve is opened to perform brake pipe pressure reduction, so that the brake of the vehicle is actuated. When conducting the brake adjuster performance test, it is necessary to first inflate the brake pipe to the rated pressure and then reduce the pressure by 200 kPa. This operation process needs to be repeated 6 to 8 times, resulting in a long charging and discharging time and being not conducive to improving the test efficiency. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a freight car single bicycle tester with a function of fast charging and fast discharging of a brake cylinder and a test method thereof.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A single-car tester for freight cars with the function of fast charging and fast discharging of brake cylinders. The main air pipe has its end connected to the brake pipe, and the other end of the brake pipe is connected to the vehicle under test or the function air cylinder. The vehicle under test is connected to the brake cylinder. A fast air pipe is connected to the main air pipe, and the other end of the fast air pipe is connected to the brake cylinder.

[0008] A main air valve and a brake charging valve group are connected to the main air pipe. The brake charging valve group is connected to the brake pipe, and a brake exhaust valve group is connected to the brake pipe. A brake cylinder charging solenoid valve is connected to the fast air pipe, and a brake cylinder exhaust solenoid valve is also connected to the fast air pipe through a pipeline.

[0009] The single-car tester of the present invention that can achieve fast charging and fast discharging of the brake cylinder can conduct single-car performance tests on newly manufactured or overhauled freight cars in accordance with the "Single-Car Test Method (Trial) for Railway Freight Cars with a Constant Pressure of 600 kPa", without affecting the existing single-car test function. By adding brake cylinder charging and exhaust solenoid valves on the existing basis, the brake cylinder pressure can be quickly charged to the specified pressure or quickly emptied through a direct connection method, without repeatedly charging and exhausting the brake pipe and auxiliary air cylinder, thereby shortening the test process and improving the operation efficiency.

[0010] The present invention realizes the fast charging and discharging function of the brake cylinder by adding brake cylinder charging and exhaust solenoid valves, improves the efficiency of the brake adjuster performance test, and thus improves the single-car test efficiency. The present invention is provided with a brake cylinder charging solenoid valve, which realizes the fast charging function of the brake cylinder, shortens the single-car test time, and improves the vehicle delivery efficiency; it is provided with a brake cylinder exhaust solenoid valve, which realizes the fast exhaust function of the brake cylinder, shortens the single-car test time, and improves the vehicle delivery efficiency.

[0011] As a preferred solution of the present invention, a filter two-piece and a main air precision pressure reducing valve are also connected to the main air pipe, and the main air valve, the filter two-piece, the main air precision pressure reducing valve, and the brake charging valve group are arranged in sequence.

[0012] As a preferred solution of the present invention, the inlet of the fast air pipe is connected to a section of the main air pipe between the filter two-piece and the main air precision pressure reducing valve, and a brake precision pressure reducing valve is connected to the fast air pipe.

[0013] As a preferred solution of the present invention, pressure gauges are connected to the outlets of the brake charging valve group and the filter two-piece.

[0014] As a preferred solution of the present invention, the brake charging valve group includes a first charging solenoid valve and a second charging solenoid valve arranged in parallel.

[0015] As a preferred solution of the present invention, the brake exhaust valve group includes a sensitivity solenoid valve, a stability solenoid valve, an emergency solenoid valve, a 120 stability solenoid valve, and a 120 emergency solenoid valve connected in sequence to the brake pipe.

[0016] As a preferred embodiment of the present invention, throttle valves are connected to the sensitivity solenoid valve, stability solenoid valve, emergency solenoid valve, 120 stability solenoid valve, and 120 emergency solenoid valve.

[0017] As a preferred embodiment of the present invention, a hose connector is further connected to the brake pipe, and the hose connector is connected to the vehicle under test or the function air cylinder.

[0018] As a preferred embodiment of the present invention, a brake pipe sensor is further connected to the brake pipe, and a brake cylinder sensor is connected to the brake cylinder.

[0019] A test method for a single-car tester of a freight car with a function of quickly charging and discharging the brake cylinder includes the following steps:

[0020] S1: When a performance test of the brake adjuster of the vehicle under test is required, first open the first inflation solenoid valve to charge the air to the rated pressure and then close it. Open the brake exhaust valve group to first reduce the pressure of the brake pipe by 50 kPa and then close it, so that the brake is in the pressure-holding state.

[0021] S2: Open the brake cylinder inflation solenoid valve to quickly charge the brake cylinder, so that the pressure of the brake cylinder is quickly inflated to the specified pressure.

[0022] S3: When the brake of the vehicle under test is released and the control valve discharges the pressure of the brake cylinder to the atmosphere for release, open the brake cylinder exhaust solenoid valve to accelerate the discharge of the pressure of the brake cylinder to the atmosphere, thereby shortening the exhaust time of the brake cylinder.

[0023] The beneficial effects of the present invention are as follows:

[0024] The single-car tester of the present invention that can achieve quick charging and discharging of the brake cylinder can perform a single-car performance test on newly manufactured or repaired freight cars in accordance with the "Trial Method for Single-Car Test of Freight Cars with a Rated Pressure of 600 kPa for Railway Freight Cars", without affecting the existing single-car test function. By adding inflation and exhaust solenoid valves for the brake cylinder on the existing basis, the pressure of the brake cylinder can be quickly inflated to the specified pressure or quickly emptied through a direct connection method, without repeatedly inflating and exhausting the brake pipe and auxiliary air cylinder, thereby shortening the test process and improving the operation efficiency. Description of the Drawings

[0025] Figure 1 is the schematic diagram of the single-car tester of the present invention;

[0026] Figure 2 is the schematic diagram of the existing single-car tester.

[0027] In the figure: 1 - main air duct; 2 - brake pipe; 3 - vehicle under test; 4 - quick air duct; 11 - main air ball valve; 12 - brake charging valve group; 13 - filter combination unit; 14 - main air precision pressure reducing valve; 15 - pressure gauge; 21 - brake exhaust valve group; 22 - hose connector; 23 - brake pipe sensor; 31 - brake cylinder; 41 - brake cylinder charging solenoid valve; 42 - brake cylinder exhaust solenoid valve; 43 - brake precision pressure reducing valve; 121 - first charging solenoid valve; 122 - second charging solenoid valve; 211 - sensitivity solenoid valve; 212 - stability solenoid valve; 213 - emergency solenoid valve; 214 - 120 stability solenoid valve; 215 - 120 emergency solenoid valve; 311 - brake cylinder sensor. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0030] As Figure 1 shown, for the single - vehicle tester for freight cars with the function of fast charging and fast discharging of the brake cylinder in this embodiment, the main air duct 1 is provided. The end of the main air duct 1 is connected to the brake pipe 2, and the other end of the brake pipe 2 is connected to the vehicle under test 3 or the function air cylinder. The vehicle under test 3 is connected to the brake cylinder 31, and a brake cylinder sensor 311 is connected to the brake cylinder 31. The quick air duct 4 is connected to the main air duct 1. The other end of the quick air duct 4 is connected to the brake cylinder 31. A brake cylinder charging solenoid valve 41 is connected to the quick air duct 4, and a throttle valve is connected to the outlet of the brake cylinder charging solenoid valve 41. The quick air duct 4 is also connected to the brake cylinder exhaust solenoid valve 42 through a pipeline.

[0031] The main air duct 1 is successively connected with a main air ball valve 11, a filter combination unit 13, a main air precision pressure reducing valve 14 and a brake charging valve group 12. The brake charging valve group 12 is connected to the brake pipe 2. The inlet of the quick air duct 4 is connected to a section between the filter combination unit 13 and the main air precision pressure reducing valve 14 on the main air duct 1, and a brake precision pressure reducing valve 43 is connected to the quick air duct 4.

[0032] Among them, the brake charging valve group 12 includes a first charging solenoid valve 121 and a second charging solenoid valve 122 arranged in parallel. A throttle valve is connected to the outlet of the second charging solenoid valve 122. The outlets of the brake charging valve group 12 and the filter and union 13 are both connected to a pressure gauge 15.

[0033] A brake exhaust valve group 21, a hose connector 22, and a brake pipe 2 sensor are connected to the brake pipe 2. The hose connector 22 is connected to the test vehicle 3 or the function air cylinder.

[0034] Among them, the brake exhaust valve group 21 includes a sensitivity solenoid valve 211, a stability solenoid valve 212, an emergency solenoid valve 213, a 120 stability solenoid valve 214, and a 120 emergency solenoid valve 215 that are sequentially connected to the brake pipe 2. Throttle valves are connected to the sensitivity solenoid valve 211, the stability solenoid valve 212, the emergency solenoid valve 213, the 120 stability solenoid valve 214, and the 120 emergency solenoid valve 215, and the outlets of the throttle valves communicate with the atmosphere.

[0035] The air source of the brake cylinder 31 can come from the main air or the brake pipe 2. The main air ball valve 11 is used to control the on-off of the air source gas path. The filter and union 13 filters the compressed air provided by the air source. The main air precision pressure reducing valve 14 and the brake precision pressure reducing valve 43 are used to control the test fixed pressure, usually 600 kPa. The first charging solenoid valve 121 and the second charging solenoid valve 122 control the charging of the brake pipe 2. The first charging solenoid valve 121 is a fast charging solenoid valve, and the second charging solenoid valve 122 is a slow charging solenoid valve. The sensitivity solenoid valve 211, the stability solenoid valve 212, and the emergency solenoid valve 213 control the exhaust of the brake pipe 2. When the 120 stability solenoid valve 214 and the 120 emergency solenoid valve 215 perform the 120-type brake stability test and emergency brake test, they control the exhaust of the brake pipe 2.

[0036] The brake cylinder charging solenoid valve 41 controls the rapid charging of the auxiliary air cylinder. The brake cylinder exhaust solenoid valve 42 controls the rapid exhaust of the auxiliary air cylinder. The brake pipe 2 sensor detects the pressure value of the brake pipe 2. The brake cylinder 31 sensor detects the pressure value of the brake cylinder 31. The throttle valve is used to adjust the charging and exhaust time of each solenoid valve to meet the standard requirements. The function air cylinder is used for the function test of the single vehicle tester. The hose connector 22 is used to connect the single vehicle tester to the function air cylinder or the test vehicle 3. The quick air pipe 4 is used to connect the single vehicle tester to the auxiliary air cylinder of the vehicle brake.

[0037] The single - vehicle tester capable of achieving fast charging and fast discharging of the brake cylinder 31 in the present invention can conduct single - vehicle performance tests on newly manufactured or repaired freight vehicles in accordance with the "Trial Method for Single - Vehicle Tests of Railway Freight Cars with a Fixed Pressure of 600 kPa". It will not affect the existing single - vehicle test function. On the existing basis, an air - charging solenoid valve and an exhaust solenoid valve for the brake cylinder 31 are added. Through a direct - connection method, the pressure of the brake cylinder 31 can be quickly charged to the specified pressure or quickly emptied, without repeatedly charging and discharging the brake pipe 2 and the auxiliary air cylinder, thereby shortening the test process and improving the operation efficiency.

[0038] In the present invention, by adding an air - charging solenoid valve and an exhaust solenoid valve for the brake cylinder 31, the fast charging and discharging function of the brake cylinder 31 is achieved, improving the efficiency of the brake adjuster performance test, and thus improving the single - vehicle test efficiency. The present invention is provided with an air - charging solenoid valve 41 for the brake cylinder, achieving the fast air - charging function of the brake cylinder 31, shortening the single - vehicle test time, and improving the vehicle delivery efficiency; it is provided with an exhaust solenoid valve 42 for the brake cylinder, achieving the fast exhaust function of the brake cylinder 31, shortening the single - vehicle test time, and improving the vehicle delivery efficiency.

[0039] The test method of the freight vehicle single - vehicle tester with the function of fast charging and fast discharging of the brake cylinder in this embodiment includes the following steps:

[0040] S1: When the performance test of the brake adjuster of the vehicle to be tested 3 is required, first open the first air - charging solenoid valve 121 to charge the air to the fixed pressure and then close it. Open the brake exhaust valve group 21 to first reduce the pressure of the brake pipe 2 by 50 kPa and then close it, so that the brake is in the pressure - holding state;

[0041] S2: Open the air - charging solenoid valve 41 for the brake cylinder to conduct fast charging of the brake cylinder 31, so that the pressure of the brake cylinder 31 is quickly charged to the specified pressure;

[0042] S3: When the brake of the vehicle to be tested 3 is released and the control valve discharges the pressure of the brake cylinder 31 to the atmosphere for release, open the exhaust solenoid valve 42 for the brake cylinder to accelerate the discharge of the pressure of the brake cylinder 31 to the atmosphere, thereby shortening the exhaust time of the brake cylinder 31.

[0043] Working principle:

[0044] The vehicle brake mainly consists of components such as the 120-type control valve, empty and load automatic adjustment device, brake adjuster, and brake cylinder 31. Among them, the 120-type control valve determines the state of the vehicle brake. The 120-type control valve connects four pipelines: the brake pipe 2, auxiliary air cylinder, acceleration and retardation air cylinder, and brake cylinder 31. When the pressure of the brake pipe 2 rises, the 120-type control valve is in the charging and releasing position. At this time, the brake pipe 2 is connected to the auxiliary air cylinder and the acceleration and retardation air cylinder through the internal structure of the control valve, and the pressures of the two gradually increase until the pressures of the three are basically the same. At the same time, the brake cylinder 31 communicates with the atmosphere through the internal passage of the control valve, discharging the pressure of the brake cylinder 31 to the atmosphere to achieve the releasing function of the vehicle brake. When the pressure of the brake pipe 2 is charged to the rated pressure and then starts to decompress for braking, the pressure of the brake pipe 2 is discharged to the atmosphere, the passage between the brake cylinder 31 and the atmosphere is disconnected, the auxiliary air cylinder fills the brake cylinder 31 with air, the pressure of the brake cylinder 31 rises, and the vehicle brake realizes the braking function. After the brake pipe 2 stops exhausting, the pressures of the brake pipe 2 and the auxiliary air cylinder are balanced, the passage between the auxiliary air cylinder and the brake cylinder 31 is disconnected, and the passage between the brake cylinder 31 and the atmosphere is also disconnected. The pressure of the brake cylinder 31 remains unchanged, and the vehicle brake enters the pressure-holding state.

[0045] The single vehicle tester developed in this project mainly controls the pressure of the brake cylinder 31 by adding a control passage for the brake cylinder 31. According to the operating principle of the 120-type control valve, if the brake cylinder 31 is directly filled with air, the 120 control valve must be in the pressure-holding state. When a performance test of the brake adjuster is required, the single vehicle tester first opens the first charging solenoid valve 121 to charge the air to the rated pressure and then closes it. Then it opens the sensitivity solenoid valve 211 to decompress the brake pipe 2 by 50 kPa first and then closes it, so that the brake is in the pressure-holding state. At this time, the brake cylinder charging solenoid valve 41 is opened to quickly charge the brake cylinder 31, enabling the pressure of the brake cylinder 31 to be quickly charged to the specified pressure; when the vehicle brake is released and the control valve discharges the pressure of the brake cylinder 31 to the atmosphere for release, the brake cylinder exhaust solenoid valve 42 is opened to accelerate the discharge of the pressure of the brake cylinder 31 to the atmosphere, thereby shortening the exhaust time of the brake cylinder 31. By adding the charging and exhaust solenoid valves for the brake cylinder 31, repeated charging and exhausting of the brake pipe 2 and the auxiliary air cylinder are avoided, thereby shortening the test process and improving the operation efficiency.

[0046] The present invention is not limited to the above optional embodiments. Anyone can obtain other various forms of products under the inspiration of the present invention. However, no matter what changes are made in its shape or structure, as long as the technical solutions fall within the scope defined by the claims of the present invention, they all fall within the protection scope of the present invention.

Claims

1. A single-car tester for freight cars with the function of fast charging and fast discharging of the brake cylinder, characterized in that: The main air pipe (1), the end of the main air pipe (1) is connected to the brake pipe (2), the other end of the brake pipe (2) is connected to the vehicle under test (3) or the functional air cylinder, the vehicle under test (3) is connected to the brake cylinder (31), a quick air pipe (4) is connected to the main air pipe (1), and the other end of the quick air pipe (4) is connected to the brake cylinder (31); A main air valve (11) and a brake charging valve group (12) are connected to the main air pipe (1), the brake charging valve group (12) is connected to the brake pipe (2), and a brake exhaust valve group (21) is connected to the brake pipe (2); a brake cylinder charging solenoid valve (41) is connected to the quick air pipe (4), and a brake cylinder exhaust solenoid valve (42) is also connected to the quick air pipe (4) through a pipeline.

2. The single-vehicle tester for freight cars with the function of fast charging and fast discharging of brake cylinders according to claim 1, characterized in that: A filter combination (13) and a main air precision pressure reducing valve (14) are also connected to the main air pipe (1), and the main air valve (11), the filter combination (13), the main air precision pressure reducing valve (14) and the brake charging valve group (12) are arranged in sequence.

3. The single vehicle tester for freight cars with the function of fast charging and fast discharging of the brake cylinder according to claim 2, characterized in that: The inlet of the quick air pipe (4) is connected to a section between the filter combination (13) and the main air precision pressure reducing valve (14) on the main air pipe (1), and a brake precision pressure reducing valve (43) is connected to the quick air pipe (4).

4. A single-car tester for freight cars with a fast charging and fast discharging function for brake cylinders, characterized in that: Pressure gauges (15) are connected to the outlets of the brake charging valve group (12) and the filter combination (13).

5. The single vehicle tester for freight cars with the function of fast charging and fast discharging of brake cylinders according to claim 1, wherein: The brake charging valve group (12) includes a first charging solenoid valve (121) and a second charging solenoid valve (122) arranged in parallel.

6. The single-vehicle tester for freight cars with the function of fast charging and fast discharging of brake cylinders according to claim 1, characterized in that: The brake exhaust valve group (21) includes a sensitivity solenoid valve (211), a stability solenoid valve (212), an emergency solenoid valve (213), a 120 stability solenoid valve (214) and a 120 emergency solenoid valve (215) connected to the brake pipe (2) in sequence.

7. A single-vehicle tester for freight cars with a fast charging and fast discharging function of the brake cylinder, characterized in that: Throttle valves are connected to the sensitivity solenoid valve (211), the stability solenoid valve (212), the emergency solenoid valve (213), the 120 stability solenoid valve (214) and the 120 emergency solenoid valve (215).

8. A single vehicle tester for freight cars with a fast charging and fast discharging function for brake cylinders, characterized in that: A hose connector (22) is also connected to the brake pipe (2), and the hose connector (22) is connected to the vehicle under test (3) or the functional air cylinder.

9. The single car tester for freight cars with the function of fast charging and fast discharging of brake cylinders according to claim 1, characterized in that: A brake pipe (2) sensor is also connected to the brake pipe (2), and a brake cylinder (31) sensor is connected to the brake cylinder (31).

10. A test method for a single-car tester of freight cars with the function of fast charging and fast discharging of brake cylinders, using a single-car tester of freight cars with the function of fast charging and fast discharging of brake cylinders as described in claim 5, characterized in that: Including the following steps: S1: When a performance test of the brake adjuster of the vehicle under test (3) is required, first open the first charging solenoid valve (121) to charge air to the rated pressure and then close it. Open the brake exhaust valve group (21) to reduce the pressure of the brake pipe (2) by 50 kPa first and then close it, so that the brake is in the pressure holding state; S2: Open the brake cylinder charging solenoid valve (41) to perform fast charging on the brake cylinder (31), so that the pressure of the brake cylinder (31) is quickly charged to the specified pressure; S3: When the brake of the vehicle under test (3) is released and the control valve discharges the pressure of the brake cylinder (31) to the atmosphere for release, open the brake cylinder exhaust solenoid valve (42) to accelerate the discharge of the pressure of the brake cylinder (31) to the atmosphere, so as to shorten the exhaust time of the brake cylinder (31).

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