A mobile test bench for bogie braking system

Abstract

The invention discloses a mobile test bench for a bogie brake system, which relates to the technical field of bogie testing. The test bench can be flexibly moved by installing various components in a mobile box, so that the test can be carried out under working conditions where it is inconvenient to move the bogie. Through the logical combination of various valves, pressure reducing valves and air-controlled reversing valves in the air circuit system, it is possible to realize different rail vehicle bogie brake clamp action tests, parking brake control tests and bogie pipeline air tightness tests. The invention has a wide range of applications and ensures that the test process is closer to the actual working state of the bogie, so as to meet the test of different rail vehicle bogie brake systems. The invention has good stability and is easy to operate, and damage to the bogie air circuit interface caused by frequent disassembly of the air circuit during the test process and tedious and repeated disassembly and assembly of the pipeline are avoided, so that the test efficiency can be effectively improved, the test accuracy can be ensured, and the inspection of the performance indicators of the bogie brake system can be fully met.

Description

Technical Field

[0001] The present invention relates to the technical field of bogie testing, in particular to a mobile test bench for a bogie braking system. Background Art

[0002] Newly built or overhauled bogie brake systems must undergo appropriate testing before being put into use and can only be connected to the vehicle body after they have been confirmed to be qualified. Existing bogie brake system test rigs, due to the parking cylinder pressure of the brake caliper with a parking function being higher than the brake cylinder pressure, require frequent adjustments to the air source pressure and disassembly of the test rig piping according to the test content. Furthermore, the internal piping layout of the rig is cluttered, the test pressure is unstable, and the operation process is cumbersome. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a mobile test bench for bogie braking system, which has a wide range of applications, good stability, and is easy to operate, and can effectively improve test efficiency and ensure test accuracy.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a mobile test bench for a bogie braking system, comprising a mobile box, an air circuit system and a valve plate group, wherein the air circuit system and the valve plate group are both installed in the mobile box, the valve plate group comprising a first pressure reducing valve, a second pressure reducing valve, a first air-controlled reversing valve and a second air-controlled reversing valve, the air circuit system comprising an air intake valve, a main air circuit, an air cylinder, a first branch air circuit, a second branch air circuit, a third branch air circuit, a fourth branch air circuit, a first valve, a second valve, a third valve, a fourth valve, a first pressure gauge, a second pressure gauge, a third pressure gauge, a first quick-plug interface, a second quick-plug interface and a third quick-plug interface, the air intake valve, the air cylinder and the first pressure gauge are sequentially arranged on the main air circuit, the first branch air circuit, the second branch air circuit, the third branch air circuit and the fourth branch air circuit are all connected to the main air circuit, the first valve is provided on the first branch air circuit, the second valve is provided on the second branch air circuit, the third valve is provided on the third branch air circuit in sequence, The first air-controlled reversing valve and the second pressure gauge are respectively connected to the first quick-plug interface and the second quick-plug interface at one end of the third branch air circuit away from the main air circuit, and the first quick-plug interface and the second quick-plug interface are respectively used to connect with the two brake cylinder air circuit interfaces of the bogie, and the second branch air circuit is connected to the control end of the second air-controlled reversing valve at one end away from the main air circuit. The fourth air circuit is sequentially provided with the fourth gate valve, the second pressure reducing valve and the third pressure gauge, and the two ends of the first air-controlled reversing valve are respectively connected to the third branch air circuit and the fourth branch air circuit, and the end of the first branch air circuit away from the main air circuit is connected to the control end of the first air-controlled reversing valve. The first air-controlled reversing valve is arranged on the outside of the second pressure gauge and the third pressure gauge, and the end of the fourth branch air circuit away from the main air circuit is connected to the third quick-plug interface, and the third quick-plug interface is used to connect with the parking cylinder air circuit interface of the bogie.

[0006] Preferably, the gas path system further includes two filters, and the two filters are respectively arranged on the first branch gas path and the second branch gas path.

[0007] Preferably, the mobile box includes a box body, a hand push rod, two cabinet doors, two first slide grooves, two second slide grooves and multiple casters. The box body is a front-end open structure, and one cabinet door is hinged on both sides of the front end of the box body. The multiple casters are installed at the bottom of the box body, the hand push rod is arranged on one side of the upper part of the box body, and the two first slide grooves and the two second slide grooves are fixed above the bottom surface of the box body.

[0008] Preferably, it further comprises two air cylinder supports and two fixing assemblies, wherein one of the air cylinder supports is fixed on one of the first sliding grooves, and the two fixing assemblies are used to fix the air cylinder on the two air cylinder supports.

[0009] Preferably, a first oblong hole for installation is provided at each end of the air cylinder bracket, and the air cylinder bracket is fixed to the first sliding groove by a first fastener.

[0010] Preferably, it also includes a valve plate bracket, which is fixed on the two second slide grooves. The valve plate group also includes a valve plate, which is installed in the valve plate bracket. The first pressure reducing valve, the second pressure reducing valve, the first air-controlled reversing valve and the second air-controlled reversing valve are all installed on one side of the valve plate.

[0011] Preferably, four second oblong holes for installation are provided at the bottom of the valve plate bracket, and the valve plate bracket is fixed to the second sliding groove by a second fastener.

[0012] Preferably, the first plug door, the second plug door, the third plug door, the fourth plug door, the first pressure gauge, the second pressure gauge and the third pressure gauge are arranged above the top surface of the box body.

[0013] Preferably, the air intake valve is arranged on one side of the outside of the box body, and the first quick-plug interface, the second quick-plug interface and the third quick-plug interface are arranged on the other side of the outside of the box body.

[0014] Compared with the prior art, the present invention has achieved the following technical effects:

[0015] The mobile test bench for the bogie brake system provided by the present invention includes a mobile box, an air circuit system and a valve plate group. By installing the air circuit system and the valve plate group in the mobile box, the test bench can be flexibly moved, which can meet the requirements of conducting tests under working conditions where it is inconvenient to move the bogie. By setting pressure reducing valves and air-controlled reversing valves with different pressure values, the test is closer to the actual bogie brake caliper unit action test; by setting a digital pressure gauge, the pressure value of each test air circuit can be easily observed to ensure the accuracy of different air circuit test pressures; by setting a number of quick-plug air circuit outlets corresponding to the bogie air circuit interface, targeted connection is achieved to avoid damage to the bogie air circuit interface caused by frequent disassembly of the air circuit during the test process and tedious and repeated disassembly and assembly of the pipeline, thus saving work time and improving work efficiency; by the logical combination of each valve, pressure reducing valve and reversing valve, it is possible to realize different rail vehicle bogie brake caliper action tests, parking brake control tests and bogie pipeline air tightness tests, with a wide range of applications. It can be seen that the mobile test bench for the bogie braking system in the present invention can meet the requirements of different rail vehicle bogie braking system tests, has a wide range of uses, good stability, and is easy to operate. It can effectively improve test efficiency, ensure test accuracy, and fully meet the inspection of bogie braking system performance indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A perspective view of the mobile test bench for the bogie braking system provided by the present invention;

[0018] Figure 2 This is a front view of the mobile test bench for the bogie braking system provided by the present invention;

[0019] Figure 3 It is a three-dimensional diagram of the mobile box of the present invention;

[0020] Figure 4 It is a three-dimensional diagram of the gas path system of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the air cylinder bracket in the present invention;

[0022] Figure 6 It is a structural schematic diagram of the valve plate bracket in the present invention;

[0023] Figure 7 is a three-dimensional diagram of the valve plate assembly of the present invention;

[0024] Figure 8 It is a gas path principle diagram of the gas path system in the present invention.

[0025] Explanation of reference numerals: 1. Mobile box; 101. Box body; 102. Push rod; 103. Casters; 104. First slide; 105. Second slide; 106. Cabinet door; 2. Air system; 201. Air inlet valve; 202. Air cylinder; 203. First valve; 204. Second valve; 205. Third valve; 206. Fourth valve; 207. First pressure gauge; 208. Second pressure gauge; 209. Third pressure gauge; 210. First quick-connect connector; 211. Second quick-connect connector Interface; 212, third quick-connect interface; 213, filter; 214, main air line; 215, first branch air line; 216, second branch air line; 217, third branch air line; 218, fourth branch air line; 3, air cylinder strap; 4, air cylinder bracket; 401, first oblong hole; 5, valve plate group; 501, first pressure reducing valve; 502, second pressure reducing valve; 503, first air-controlled reversing valve; 504, second air-controlled reversing valve; 505, valve plate; 6, valve plate bracket; 601, second oblong hole. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The purpose of the present invention is to provide a mobile test bench for a bogie braking system, which has a wide range of uses, good stability, and is easy to operate, and can effectively improve test efficiency and ensure test accuracy.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1-8As shown, this embodiment provides a mobile test bench for a bogie brake system, comprising a mobile box 1, an air circuit system 2 and a valve plate group 5. The air circuit system 2 and the valve plate group 5 are both installed in the mobile box 1. The valve plate group 5 comprises a first pressure reducing valve 501, a second pressure reducing valve 502, a first air-controlled reversing valve 503 and a second air-controlled reversing valve 504. The air circuit system 2 comprises an air inlet valve 201, a main air circuit 214, an air cylinder 202, a first branch air circuit 215, a second branch air circuit 216, a third branch air circuit 217, a fourth branch air circuit 218, a first valve 203, a second valve 204, The third valve 205, the fourth valve 206, the first pressure gauge 207, the second pressure gauge 208, the third pressure gauge 209, the first quick-plug interface 210, the second quick-plug interface 211 and the third quick-plug interface 212, the air inlet valve 201, the air cylinder 202 and the first pressure gauge 207 are sequentially arranged on the main air path 214, the first branch air path 215, the second branch air path 216, the third branch air path 217 and the fourth branch air path 218 are all connected to the main air path 214, the first valve 203 is arranged on the first branch air path 215, the second valve 203 is arranged on the second branch air path 216 The third branch air path 217 is provided with a third valve 205, a first pressure reducing valve 501, a second air-controlled reversing valve 504 and a second pressure gauge 208 in sequence. The end of the third branch air path 217 away from the main air path 214 is connected to the first quick-connect interface 210 and the second quick-connect interface 211 respectively. The first quick-connect interface 210 and the second quick-connect interface 211 are used to connect to the two brake cylinder air path interfaces of the bogie respectively. The end of the second branch air path 216 away from the main air path 214 is connected to the control end of the second air-controlled reversing valve 504. The fourth air path is provided with a fourth The valve 206, the second pressure reducing valve 502, and the third pressure gauge 209 are connected to the ends of the first air-controlled reversing valve 503, respectively, and are connected to the third branch air path 217 and the fourth branch air path 218. The end of the first branch air path 215, away from the main air path 214, is connected to the control end of the first air-controlled reversing valve 503. The first air-controlled reversing valve 503 is located outside the second pressure gauge 208 and the third pressure gauge 209. The end of the fourth branch air path 218, away from the main air path 214, is connected to the third quick-connect port 212, which is used to connect to the parking cylinder air path port of the bogie. Specifically, the intake valve 201, the first valve 203, the second valve 204, the third valve 205, and the fourth valve 206 are all stop-off valves, which can exhaust air from one side when closed.

[0030] like Figure 3As shown, the mobile box 1 includes a box body 101, a push rod 102, two cabinet doors 106, two first chutes 104, two second chutes 105, and multiple casters 103. The box body 101 is a front-end open structure, with a cabinet door 106 hinged on both sides of the front end of the box body 101. Multiple casters 103 are installed at the bottom of the box body 101, the push rod 102 is set on one side of the upper part of the box body 101, and the two first chutes 104 and two second chutes 105 are fixed above the bottom surface of the box body 101. By providing the casters 103 and the push rod 102, the flexible movement of the box body 101 can be achieved, which can meet the requirements of testing under working conditions where it is inconvenient to move the bogie.

[0031] In this specific embodiment, the box body 101 is a plate welded structure, the push rod 102 is welded to one end of the box body 101 in the length direction, the caster 103 is connected to the mounting hole at the bottom of the box body 101 through a connecting bolt, the first slide groove 104 and the second slide groove 105 are welded to the bottom surface of the box body 101, the first slide groove 104 and the second slide groove 105 are both C-shaped grooves, and the two cabinet doors 106 are hinged to the box body 101 through hinges. The cabinet door 106 is located on one side of the width direction of the box body 101, and the cabinet door 106 is used to block the influence of external dust on the internal air path system 2.

[0032] To facilitate observation of the pressure values ​​in each air path, the first valve 203, the second valve 204, the third valve 205, the fourth valve 206, the first pressure gauge 207, the second pressure gauge 208, and the third pressure gauge 209 are located above the top surface of the housing 101. To facilitate connection to an external high-pressure air source, the air inlet valve 201 is located on one side of the exterior of the housing 101. To facilitate connection to the bogie air path interface, the first quick-connect port 210, the second quick-connect port 211, and the third quick-connect port 212 are located on the other side of the exterior of the housing 101.

[0033] The air circuit system 2 is connected via multiple pipe joints. Specifically, the connecting pipes of the various components in the air circuit system 2 are made of stainless steel, and the pipe joints are sealed with ferrule-type joints. A first mounting hole is provided on one side of the housing 101. An air intake valve 201 is secured to this first mounting hole via a pipe joint. The air intake valve 201 is used to open and close the main air circuit 214. The top surface of the housing 101 is provided with multiple second mounting holes. A first valve 203, a second valve 204, a third valve 205, and a fourth valve 206 are secured to these second mounting holes on the top of the housing 101 via pipe joints. The first valve 203 controls the pneumatic signal for the first air-controlled reversing valve 503, the second valve 204 controls the pneumatic signal for the second air-controlled reversing valve 504, the third valve 205 controls the opening and closing of the test air circuit to the bogie brake cylinder, and the fourth valve 206 controls the opening and closing of the test air circuit to the bogie parking cylinder. The top surface of the housing 101 is also provided with three third mounting holes. A first pressure gauge 207, a second pressure gauge 208, and a third pressure gauge 209 are secured to these third mounting holes on the top of the housing 101 via pipe joints. The first pressure gauge 207 is used to display the total air pressure, the second pressure gauge 208 is used to display the pressure in the bogie brake cylinder test air circuit, and the third pressure gauge 209 is used to display the pressure in the bogie parking cylinder test air circuit. Three fourth mounting holes are provided on the other side of the housing 101. A first quick-connect port 210, a second quick-connect port 211, and a third quick-connect port 212 are secured to these fourth mounting holes via pipe joints. The first and second quick-connect ports 210 and 211 are respectively connected to the two brake cylinder air circuit ports of the bogie via hoses and a joint body. The third quick-connect port 212 is connected to the bogie parking cylinder air circuit port via a hose and a joint body.

[0034] The air circuit system 2 also includes two filters 213, which are respectively arranged on the first branch air circuit 215 and the second branch air circuit 216. One filter 213 is connected to the first branch air circuit 215 via a pipe joint, and the other filter 213 is connected to the second branch air circuit 216 via a pipe joint. The filters 213 are used to filter the valve body control air circuit.

[0035] This embodiment also includes two air cylinder brackets 4 and two fixing components. One air cylinder bracket 4 is fixed to a first slide groove 104. The two fixing components are used to fix the air cylinder 202 to the two air cylinder brackets 4. Specifically, the fixing components include an air cylinder strap 3 and a fastener, and the air cylinder 202 is fixed to the air cylinder bracket 4 through the air cylinder strap 3 and the fastener.

[0036] like Figure 5As shown, each end of the air cylinder bracket 4 is provided with a first oblong hole 401 for mounting. The air cylinder bracket 4 is secured to the first chute 104 via a first fastener. To ensure more stable placement of the air cylinder 202, the central portion of the air cylinder bracket 4 is formed into an inner concave surface that matches the structure of the air cylinder 202. Specifically, the first fasteners are bolts and threaded slider fasteners, and the air cylinder bracket 4 is a sheet metal structure.

[0037] This embodiment also includes a valve plate bracket 6, which is fixed on the two second slide grooves 105. The valve plate assembly 5 also includes a valve plate 505, which is installed in the valve plate bracket 6. Specifically, the valve plate 505 is fixedly connected to the side of the valve plate bracket 6 by bolt fasteners. Figure 7 As shown, the valve plate 505 is used to fix the valve body and communicate the air path. An air path communication hole is opened inside the valve plate 505. The first pressure reducing valve 501, the second pressure reducing valve 502, the first air-controlled reversing valve 503 and the second air-controlled reversing valve 504 are all installed on one side of the valve plate 505. Specifically, a plurality of mounting threaded holes are provided on the valve plate 505. The first pressure reducing valve 501 is provided with a mounting through hole, which is fixed to the mounting threaded hole on the valve plate 505 by bolts, and is used for pressure regulation of the bogie brake cylinder test air circuit; the second pressure reducing valve 502 is provided with a mounting through hole, which is fixed to the mounting threaded hole on the valve plate 505 by bolts, and is used for pressure regulation of the bogie parking cylinder test air circuit; the second air-controlled reversing valve 504 is provided with a mounting through hole, which is fixed to the mounting threaded hole on the valve plate 505 by bolts, and is used for charging and exhausting the bogie brake cylinder test air circuit; the first air-controlled reversing valve 503 is provided with a mounting through hole, which is fixed to the mounting threaded hole on the valve plate 505 by bolts, and is used for air tightness testing of the bogie brake cylinder and parking cylinder installation air circuits.

[0038] like Figure 6 As shown, the bottom of the valve plate bracket 6 is provided with four second oblong holes 601 for installation, and the valve plate bracket 6 is fixed to the second slide groove 105 by second fasteners. Specifically, the second fasteners are bolts and threaded slider fasteners, and the valve plate bracket 6 is a sheet metal structure.

[0039] During use, the operator can use the push rod 102 to rotate the mobile box 1 through the casters 103 to move it, thereby pushing the mobile test bench of the bogie brake system to the bogie test area where the test is required. The air intake valve 201 is connected to the external high-pressure air source, and the external air source pressure can be observed through the first pressure gauge 207. The first quick-plug interface 210 and the second quick-plug interface 211 are respectively connected to the two brake cylinder air circuit interfaces of the bogie through a hose and a connector body, and the third quick-plug interface 212 is connected to the bogie parking cylinder air circuit interface through a hose and a connector body.

[0040] When the brake caliper action test is carried out: on the test bench, the first valve 203, the second valve 204, the third valve 205 and the fourth valve 206 are all closed. The fourth valve 206 is opened to allow the compressed air decompressed by the second pressure reducing valve 502 to enter the parking cylinder of the bogie clamp unit from the third quick-connect interface 212 through the connecting hose, so that the parking cylinder is in a relieved state. The pressure value of the air circuit to the parking cylinder can be observed through the third pressure gauge 209. The third valve 205 is opened to allow the compressed air decompressed by the first pressure reducing valve 501 to enter the parking cylinder of the bogie clamp unit from the first quick-connect interface 210 and the second quick-connect interface 211 through the connecting hose. The cylinder and the brake caliper unit perform a clamping action. The pressure value of the air circuit to the brake cylinder can be observed through the second pressure gauge 208. Then the second gate 204 is opened, the second air-controlled reversing valve 504 is actuated, and the compressed air in the brake cylinder of the bogie caliper unit is discharged from the exhaust port of the second air-controlled reversing valve 504. The bogie caliper unit performs a relieving action. The second gate 204 is closed, and the second air-controlled reversing valve 504 is reset under the action of the spring. The third gate 205 is continued to be opened to make the brake caliper unit perform a clamping action. Repeat the above operating steps to make the brake caliper unit repeatedly brake and relieve until the clearance between the brake caliper unit and the brake disc meets the requirements.

[0041] When conducting the parking clamp action test: when the bogie clamp unit is in the relieved state and the first gate 203, second gate 204, third gate 205 and fourth gate 206 of the test bench are all closed, open the fourth gate 206 to allow the compressed air decompressed by the second pressure reducing valve 502 to enter the bogie clamp unit parking cylinder through the third quick-connect interface 212 and the connecting hose. The brake caliper unit is in the relieved state. The air circuit pressure value to the parking cylinder can be observed through the third pressure gauge 209. Then close the fourth gate 206. The compressed air in the parking cylinder of the bogie clamp unit is discharged from the exhaust port of the fourth gate 206. The bogie with parking cylinder clamp unit performs a clamping action. Continue to open the third gate 205 to make the brake caliper unit perform a relieved action. Repeat the above steps to observe whether the action of the parking brake caliper unit is normal.

[0042] When conducting an air tightness test on the bogie brake line: on the test bench, the first valve 203, the second valve 204, the third valve 205, and the fourth valve 206 are all in the closed condition. Open the first valve 203, the first air-controlled reversing valve 503 is actuated, and the fourth valve 206 is opened. Compressed air of the same pressure enters the bogie brake line connected to the parking cylinder through the third quick-connect interface 212 on one side, and enters the bogie brake line connected to the brake cylinder through the second pressure reducing valve 502 via the first air-controlled reversing valve 503 through the first quick-connect interface 210 and the second quick-connect interface 211 on the other side. The air line pressure value can be observed through the third pressure gauge 209. Close the air inlet valve 201, maintain the pressure for 10 minutes, and observe whether the pressure value of the third pressure gauge 209 meets the air tightness requirements.

[0043] It can be seen that in this embodiment, by installing the air circuit system 2 and the valve plate group 5 in the mobile box 1, the test bench can be flexibly moved, which can meet the requirements of conducting tests under operating conditions where it is inconvenient to move the bogie. By setting pressure reducing valves and air-controlled reversing valves with different pressure values, the test is closer to the actual bogie brake caliper unit action test; by setting a digital pressure gauge, the pressure value of each test air circuit can be easily observed to ensure the accuracy of different air circuit test pressures; by setting a number of quick-plug air circuit outlets corresponding to the bogie air circuit interface, targeted connection is made to avoid damage to the bogie air circuit interface caused by frequent disassembly of the air circuit during the test process and tedious and repeated disassembly and assembly of the pipeline, saving operation time and improving operation efficiency; through the logical combination of various gates, pressure reducing valves and reversing valves, it is possible to realize different rail vehicle bogie brake caliper action tests, parking brake control tests and bogie pipeline air tightness tests, with a wide range of applications. It can be seen that the mobile test bench for the bogie braking system in this embodiment can meet the requirements of different rail vehicle bogie braking system tests, has a wide range of uses, good stability, and is easy to operate. It can effectively improve test efficiency, ensure test accuracy, and fully meet the inspection of bogie braking system performance indicators.

[0044] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A mobile test bench for bogie braking system, characterized in that: It includes a mobile box, an air circuit system and a valve plate group, the air circuit system and the valve plate group are both installed in the mobile box, the valve plate group includes a first pressure reducing valve, a second pressure reducing valve, a first air-controlled reversing valve and a second air-controlled reversing valve, the air circuit system includes an air intake valve, a main air circuit, an air cylinder, a first branch air circuit, a second branch air circuit, a third branch air circuit, a fourth branch air circuit, a first valve, a second valve, a third valve, a fourth valve, a first pressure gauge, a second pressure gauge, a third pressure gauge, a first quick-plug interface, a second quick-plug interface and a third quick-plug interface, the air intake valve, the air cylinder and the first pressure gauge are sequentially arranged on the main air circuit, the first branch air circuit, the second branch air circuit, the third branch air circuit and the fourth branch air circuit are all connected to the main air circuit, the first valve is arranged on the first branch air circuit, the second valve is arranged on the second branch air circuit, the third valve, the first pressure reducing valve, the first pressure gauge, the second pressure gauge, the third pressure gauge, the first quick-plug interface, the second quick-plug interface and the third quick-plug interface are sequentially arranged on the third branch air circuit The second air-controlled reversing valve and the second pressure gauge, the end of the third branch air circuit away from the main air circuit is respectively connected with the first quick-plug interface and the second quick-plug interface, the first quick-plug interface and the second quick-plug interface are respectively used to connect with the two brake cylinder air circuit interfaces of the bogie, the end of the second branch air circuit away from the main air circuit is connected with the control end of the second air-controlled reversing valve, the fourth branch air circuit is sequentially provided with the fourth valve, the second pressure reducing valve and the third pressure gauge, the two ends of the first air-controlled reversing valve are respectively connected with the third branch air circuit and the fourth branch air circuit, the end of the first branch air circuit away from the main air circuit is connected with the control end of the first air-controlled reversing valve, the first air-controlled reversing valve is arranged on the outside of the second pressure gauge and the third pressure gauge, the end of the fourth branch air circuit away from the main air circuit is connected with the third quick-plug interface, and the third quick-plug interface is used to connect with the parking cylinder air circuit interface of the bogie.

2. The mobile test bench for bogie brake system according to claim 1, characterized in that: The gas circuit system further includes two filters, which are respectively arranged on the first branch gas circuit and the second branch gas circuit.

3. The mobile test bench for bogie brake system according to claim 1, characterized in that: The mobile box includes a box body, a push rod, two cabinet doors, two first slide grooves, two second slide grooves and multiple casters. The box body is a front-end open structure, and one cabinet door is hinged on both sides of the front end of the box body. The multiple casters are installed on the bottom of the box body, the push rod is arranged on one side of the upper part of the box body, and the two first slide grooves and the two second slide grooves are fixed above the bottom surface of the box body.

4. The mobile test bench for bogie brake system according to claim 3, characterized in that: It also includes two air cylinder brackets and two fixing components, one of the air cylinder brackets is fixed on one of the first sliding grooves, and the two fixing components are used to fix the air cylinder on the two air cylinder brackets.

5. The mobile test bench for bogie brake system according to claim 4, characterized in that: A first oblong hole for installation is respectively arranged at both ends of the air cylinder bracket, and the air cylinder bracket is fixed to the first sliding groove by a first fastener.

6. The mobile test bench for bogie brake system according to claim 3, characterized in that: It also includes a valve plate bracket, which is fixed on the two second slide grooves. The valve plate group also includes a valve plate, which is installed in the valve plate bracket. The first pressure reducing valve, the second pressure reducing valve, the first air-controlled reversing valve and the second air-controlled reversing valve are all installed on one side of the valve plate.

7. The mobile test bench for bogie brake system according to claim 6, characterized in that: The bottom of the valve plate bracket is provided with four second oblong holes for installation, and the valve plate bracket is fixed to the second slide groove by a second fastener.

8. The mobile test bench for bogie brake system according to claim 3, characterized in that: The first plug door, the second plug door, the third plug door, the fourth plug door, the first pressure gauge, the second pressure gauge and the third pressure gauge are arranged above the top surface of the box body.

9. The mobile test bench for bogie brake system according to claim 3, characterized in that: The air intake valve is arranged on one side of the exterior of the box body, and the first quick-plug interface, the second quick-plug interface and the third quick-plug interface are arranged on the other side of the exterior of the box body.

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