Emergency two-section valve shrinkage plugging fastening test device

Abstract

The utility model provides an emergency two-section valve shrinkage plug fastening test device, which relates to the technical field of railway vehicle braking, is used for verifying the fastening performance of threaded connection between a shrinkage plug of an emergency two-section valve and a shrinkage cavity of the emergency two-section valve, and comprises at least one simulation body, a simulation channel for the operation of the emergency two-section valve is arranged in the simulation body; the upper part and the lower part of the side wall of the simulation body are respectively provided with a two-way air interface communicated with the passage of the emergency two-section valve; the vibration device is arranged on the simulation body; the operating valve is connected with the two ventilation ports and the first gas source, the operating valve can control gas to enter from one of the two ventilation ports and to be exhausted from the other ventilation port, and when the gas is exhausted from the other ventilation port, the gas is exhausted into the atmosphere through the exhaust hole of the operating valve. And the test verification of the shrinkage and plugging fastening torque of the emergency two-section valve is effectively ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway vehicle braking, and more specifically relates to an emergency two-stage valve shrinkage and plugging fastening test device. Background Art

[0002] The air brake device of railway vehicles is mainly composed of brake cylinder, 120 valve, auxiliary air cylinder, acceleration and deceleration air cylinder, automatic adjustment device for empty and loaded vehicles, brake pipe, etc. The interior of 120 valve is mainly composed of action part, deceleration part, acceleration relief valve, emergency two-stage valve, etc. The main function of emergency two-stage valve is to realize the two-stage pressure rise of brake cylinder, first fast and then slow, when the vehicle brakes. When the vehicle is relieved, it serves as a passage for the brake cylinder to communicate with the atmosphere to realize brake cylinder relief.

[0003] The 120 valve is divided into two types, 10 inches and 14 inches, according to the matching brake cylinder model. Compared with the 14-inch 120 valve, the 10-inch 120 valve mainly has a reduction hole installed on the valve body of the emergency second-stage valve and between the two vents of the emergency second-stage valve. When the improved 14-inch 120 valve is developed and produced, each reduction plug is optimized and improved from the original independent structure to an integrated conversion reduction plug. Therefore, when inspecting the emergency second-stage valve of the 120 valve, there are two structures: the independent reduction plug of the existing 120 valve and the integrated conversion reduction plug of the improved 120 valve.

[0004] like Figure 1 As shown, the emergency two-stage valve includes a valve body 2, a spring 21, an O-ring 22, a shrinkage hole and a shrinkage plug 1 threadedly connected to the shrinkage hole. When the emergency two-stage valve is assembled inside the 120 valve 24, a brake cylinder filling and exhaust passage, two ventilation interfaces 5 connected to the brake cylinder and the air source respectively, and a vehicle pipe passage 23 above the valve body 2 are formed around the valve body 2.

[0005] During vehicle use, with the vibration and brake relief, part of the plugging of the two types of 120 valve emergency two-stage valves will fall off or loosen. In order to further improve the reliability of the tightening of the emergency two-stage valve, the existing technology of the emergency two-stage valve is analyzed and the tightening torque of the emergency two-stage valve is calculated and determined.

[0006] In order to verify the scientific, reasonable and reliable calculation process of the calculated emergency two-stage valve plugging tightening torque and the results, a 120-valve test bench is currently used for testing. However, the test content includes auxiliary air cylinder inflation, manual click test procedures, brake cylinder relief, etc. The test time is relatively long, and frequent brake relief is prone to damage the test bench equipment, affecting the production rhythm of the process. Utility Model Content

[0007] The purpose of the utility model is to provide an emergency two-stage valve shrinkage and plugging fastening test device in view of the deficiencies in the existing technology, so as to solve the problem proposed in the above background technology that a 120 valve test bench is currently used for testing in order to verify the rationality of the calculation of the emergency two-stage valve shrinkage and plugging fastening torque obtained by analyzing the existing technology of the emergency two-stage valve, but the test time of the 120 valve test bench is relatively long, and the test bench equipment is easily damaged during frequent tests, thereby affecting the production rhythm of the process.

[0008] In order to achieve the above-mentioned purpose, the utility model provides an emergency two-stage valve shrinkage plugging and fastening test device, which is used to verify the tightness of the shrinkage plug of the emergency two-stage valve and the shrinkage hole thread connection of the emergency two-stage valve. The test device includes:

[0009] At least one simulation body, wherein the simulation body is provided with a simulation channel for the operation of the emergency two-stage valve, and the upper and lower parts of the side walls of the simulation body are respectively provided with two ventilation interfaces connected with the passage of the emergency two-stage valve;

[0010] A vibration device, wherein the vibration device is arranged on the simulation body;

[0011] A control valve is connected to the two ventilation interfaces and the first gas source. The control valve can control the gas to enter from one of the two ventilation interfaces and be discharged from the other one. When the gas is discharged from the other ventilation interface, it is discharged into the atmosphere through the exhaust hole of the control valve.

[0012] Preferably, the simulation body comprises:

[0013] A cylinder, wherein a breathing hole is provided at the top of the cylinder and a cylinder mouth is provided at the bottom of the cylinder;

[0014] A lower cover is threadedly connected to the barrel mouth.

[0015] Preferably, the vibration device comprises:

[0016] at least one pneumatic vibrator connected to a second air source;

[0017] A pressure regulating valve is arranged between the pneumatic vibrator and the second air source.

[0018] Preferably, the emergency two-stage valve shrinkage and plugging fastening test device further comprises:

[0019] A seat plate, wherein the simulation body is arranged on the seat plate;

[0020] A plurality of spring damping seats are distributed and connected to the bottom of the seat plate.

[0021] Preferably, the emergency two-stage valve shrinkage and plugging fastening test device also includes at least one fixed plate, which is in an inverted L-shape, and the bottom of the fixed plate is connected to the top of the seat plate, and the top and bottom of each of the simulation bodies are respectively against the top plate surface of the fixed plate and the top of the seat plate.

[0022] Preferably, the lower cover comprises:

[0023] Cover body;

[0024] A stud, the bottom end of which is connected to the cover body, the stud is threadedly connected to the inner side of the barrel mouth, the top end of which can abut against the bottom end of the emergency two-stage valve and can abut the emergency two-stage valve to different braking positions.

[0025] Preferably, the emergency two-stage valve shrinkage and plugging tightening test device also includes two pressure gauges and two valves, one of the pressure gauges and one of the valves are arranged between the pneumatic vibrator and the second air source, and the other pressure gauge and the other valve are arranged between the control valve and the first air source.

[0026] Preferably, the pneumatic vibrator is a GT13 type pneumatic turbine vibrator.

[0027] Preferably, the first gas source and the second gas source are both 500 KPa compressed air output gas sources.

[0028] Preferably, the number of the simulation body and the number of the pneumatic vibrators are both plural, the multiple simulation bodies are connected in parallel, and the multiple pneumatic vibrators are connected in series.

[0029] The utility model provides an emergency two-stage valve shrinkage and plugging fastening test device, which has the following beneficial effects:

[0030] The test device determines the important dimensions of the simulation body according to the physical surveying and mapping of the emergency two-stage valve and related drawings, and is designed according to the operating conditions of the emergency two-stage valve. The vehicle vibration process is simulated by a vibration device, compressed air is provided by the first air source, and the vibration frequency and test pressure and other data are determined. The test device is scientifically and reasonably designed and can effectively simulate the operating conditions of the emergency two-stage valve.

[0031] The test device adopts a fixed first air source pressure input, which can quickly realize emergency two-stage valve braking and relief effects without waiting for the auxiliary air cylinder to be charged and the brake cylinder to be relieved. It also adopts a mechanical control valve to implement the braking relief action, which causes less damage to the test equipment.

[0032] The test device has a stable and reliable structure and is easy to operate, which effectively ensures the shrinkage and tightening torque test verification of the emergency two-stage valve.

[0033] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0035] Figure 1 A cross-sectional structural schematic diagram of an emergency two-stage valve in the prior art is shown.

[0036] Figure 2 A schematic diagram of the main structure of an emergency two-stage valve shrinkage and plugging fastening test device according to an embodiment of the utility model is shown.

[0037] Figure 3 A schematic top view of the structure of an emergency two-stage valve shrinkage and plugging fastening test device according to an embodiment of the utility model is shown.

[0038] Figure 4 The schematic diagram shows the structure of an emergency two-stage valve shrinkage and plugging fastening test device according to an embodiment of the utility model when the valve body is in the common braking position.

[0039] Figure 5 The schematic diagram shows the structure of an emergency two-stage valve shrinkage and plugging fastening test device according to an embodiment of the utility model when the valve body is in the emergency braking position.

[0040] Description of reference numerals:

[0041] 1. Shrink plug; 2. Valve body; 3. Simulation body; 4. Simulation channel; 5. Ventilation interface; 6. Control valve; 7. First air source; 8. Cylinder; 9. Breathing hole; 10. Lower cover; 11. Pneumatic vibrator; 12. Second air source; 13. Pressure regulating valve; 14. Seat plate; 15. Spring damping seat; 16. Fixing plate; 17. Cover body; 18. Stud; 19. Pressure gauge; 20. Valves; 21. Spring; 22. O-ring; 23. Vehicle pipe passage; 24. 120 valve. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0043] like Figure 2 and Figure 3 As shown, the utility model provides an emergency two-stage valve shrink plugging and fastening test device, which is used to verify the tightness of the shrink plug 1 of the emergency two-stage valve and the shrinkage hole thread connection of the emergency two-stage valve. The test device includes:

[0044] At least one simulation body 3, in which a simulation channel 4 for the operation of the emergency two-stage valve is provided, and two ventilation interfaces 5 communicating with the passage of the emergency two-stage valve are respectively provided at the upper and lower parts of the side wall of the simulation body;

[0045] A vibration device, the vibration device is arranged on the simulation body 3;

[0046] The control valve 6 is connected to the two ventilation interfaces 5 and the first gas source 7. The control valve 6 can control the gas to enter from one of the two ventilation interfaces 5 and be discharged from the other one. When the gas is discharged from the other ventilation interface 5, it is discharged into the atmosphere through the exhaust hole of the control valve 6.

[0047] Specifically, in order to verify the rationality of the calculation of the emergency two-stage valve shrinkage and tightening torque obtained by analyzing the existing technology of the emergency two-stage valve, a 120 valve test bench is currently used for testing. However, the test time of the 120 valve test bench is relatively long, and the test bench equipment is easily damaged during frequent tests, affecting the production rhythm of the process. The utility model provides an emergency two-stage valve shrinkage and tightening test device.

[0048] The test device simulates the emergency two-stage valve shrinkage and plugging stress conditions for test verification. The test device determines the important dimensions of the simulation body 3 according to the physical surveying and mapping of the emergency two-stage valve and related drawings. The simulation channel 4 designed in the simulation body 3 mainly includes the valve body operation channel and the spring mounting seat of the emergency two-stage valve. The vehicle vibration process is simulated by a vibration device, compressed air is provided by the first air source 7, and data such as vibration frequency and test pressure can be obtained. The test device is scientifically and reasonably designed and can effectively simulate the operating conditions of the emergency two-stage valve.

[0049] The test device adopts a fixed first air source 7 pressure input. When the control valve 6 is placed in the "open" position, the lower ventilation interface 5 of the side wall of the simulation body 3 takes in air, and the upper ventilation interface 5 of the side wall is connected to the atmosphere through the emergency two-stage valve and the control valve 6; when the control valve 6 is placed in the "closed" position, the upper ventilation interface 5 of the side wall of the simulation body 3 takes in air, and the lower ventilation interface 5 of the side wall is connected to the atmosphere through the emergency two-stage valve and the control valve 6, which can quickly realize the emergency two-stage valve braking and relief effect without waiting for the auxiliary air cylinder to charge and the brake cylinder to release time, and the mechanical control valve 6 is used to implement the braking relief action, which causes less damage to the test equipment.

[0050] The test device has a stable and reliable structure and is easy to operate, which effectively ensures the shrinkage and tightening torque test verification of the emergency two-stage valve.

[0051] Preferably, the simulation body 3 comprises:

[0052] A cylinder 8, a breathing hole 9 is provided at the top of the cylinder 8, and a cylinder mouth is provided at the bottom of the cylinder 8;

[0053] The lower cover 10 is threadedly connected to the barrel mouth.

[0054] Specifically, during the assembly process of the cylinder 8, the spring of the emergency two-stage valve, the valve body (including the O-ring and coated with silicone oil), the lower cover O-ring and the lower cover 10 are sequentially installed in the cylinder 8.

[0055] The assembly performance of the cylinder 8 is verified by using compressed air to fill the ventilation interface 5 at the lower part of the side wall of the cylinder 8 in turn, and checking whether compressed air flows out of the ventilation interface 5 at the upper part of the side wall, and whether there is any leakage from the breathing hole 9 at the top; using compressed air to fill the ventilation interface 5 at the upper part of the side wall of the cylinder 8 in turn, and checking whether compressed air flows out of the ventilation interface 5 at the lower part of the side wall, and whether there is any leakage from the breathing hole 9 at the top.

[0056] The breathing hole 9 is used to simulate the vehicle pipe passage 23 above the emergency two-stage valve. After the spring of the emergency two-stage valve in the cylinder 8 is assembled with the valve body 2, the spring is in a compressed state.

[0057] Preferably, the vibration device comprises:

[0058] At least one pneumatic vibrator 11, the pneumatic vibrator 11 is connected to a second air source 12;

[0059] The pressure regulating valve 13 is arranged between the pneumatic vibrator 11 and the second air source 12 .

[0060] Specifically, the pneumatic vibrator 11 is a GT13 pneumatic turbine vibrator. In combination with the vibration frequency of the vehicle and the on-site test conditions, the input air pressure of the second air source 12 is adjusted to 200 KPa and the output frequency to 26 VPM during the test.

[0061] Preferably, the emergency two-stage valve shrinkage and plugging fastening test device also includes:

[0062] A seat plate 14, on which the simulation body 3 is arranged;

[0063] A plurality of spring damping seats 15 are distributed and connected to the bottom of the seat plate 14 .

[0064] Preferably, the emergency two-stage valve shrinkage and plugging fastening test device also includes at least one fixed plate 16, which is in an inverted L-shape, and the bottom of the fixed plate 16 is connected to the top of the seat plate 14, and the top and bottom of each simulation body 3 are respectively against the top plate surface of the fixed plate 16 and the top of the seat plate 14.

[0065] Specifically, the bottom of the fixing plate 16 is welded to the top of the base plate 14 . When there are multiple fixing plates, each pneumatic vibrator 11 is disposed on the top plate surfaces of at least two fixing plates 16 .

[0066] like Figure 4 and Figure 5 As shown, preferably, the lower cover includes:

[0067] Cover 17;

[0068] Stud 18, the bottom end of stud 18 is connected to cover body 17, stud 18 is connected to the inner thread of the barrel mouth, the top end of stud 18 can be pressed against the bottom end of the emergency two-stage valve, and the emergency two-stage valve can be pressed against different braking positions.

[0069] Specifically, by adjusting the cover body 17, two types of the normal braking position and the emergency braking position of the emergency two-stage valve can be simulated.

[0070] Preferably, the emergency two-stage valve shrinkage and plugging tightening test device also includes two pressure gauges 19 and two valves 20, wherein one pressure gauge 19 and one valve 20 are arranged between the pneumatic vibrator 11 and the second air source 12, and the other pressure gauge 19 and the other valve 20 are arranged between the control valve 6 and the first air source 7.

[0071] Preferably, the first gas source 7 and the second gas source 12 are both 500 KPa compressed air output gas sources.

[0072] Preferably, the number of the simulation bodies 3 and the number of the pneumatic vibrators 11 are both multiple, the multiple simulation bodies 3 are connected in parallel, and the multiple pneumatic vibrators 11 are connected in series.

[0073] Specifically, the system formed by the vibration of the vibration device and the system formed by the air filling of the control valve 6 are both independent of each other and can work together.

[0074] In summary, when the emergency two-stage valve shrinkage plugging and tightening test device of the utility model is implemented, the emergency two-stage valve that is tightened with the calculated tightening torque, the emergency two-stage valve that is tightened with a tightening torque smaller than the calculated tightening torque, and the emergency two-stage valve with the shrinkage plug screwed into four buckles are selected as samples, and the air filling test, the vibration test, and the air filling + vibration test methods are respectively used for 100, 200, and 300 cycles respectively. After the test, check whether the shrinkage plug has fallen off or loosened, and verify the calculation process of the calculated emergency two-stage valve shrinkage plugging tightening torque and the scientific, reasonable and reliable results;

[0075] The test device adopts a fixed first air source 7 pressure input. When the control valve 6 is placed in the "open" position, the lower ventilation interface 5 of the side wall of the cylinder 8 takes in air, and the upper ventilation interface 5 of the side wall is connected to the atmosphere through the emergency two-stage valve and the control valve 6; when the control valve 6 is placed in the "closed" position, the upper ventilation interface 5 of the side wall of the cylinder 8 takes in air, and the lower ventilation interface 5 of the side wall is connected to the atmosphere through the emergency two-stage valve and the control valve 6, which can quickly realize the emergency two-stage valve braking and relief effect without waiting for the auxiliary air cylinder to charge and the brake cylinder to release time, and the mechanical control valve 6 is used to implement the braking relief action, which causes less damage to the test equipment.

[0076] The various embodiments of the utility model have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An emergency two-stage valve shrink plugging and fastening test device, used to verify the tightness of the shrink plug of the emergency two-stage valve and the shrinkage hole thread connection of the emergency two-stage valve, characterized in that: The test device includes: At least one simulation body, wherein the simulation body is provided with a simulation channel for the operation of the emergency two-stage valve, and the upper and lower parts of the side walls of the simulation body are respectively provided with two ventilation interfaces connected with the passage of the emergency two-stage valve; A vibration device, wherein the vibration device is arranged on the simulation body; A control valve is connected to the two ventilation interfaces and the first gas source. The control valve can control the gas to enter from one of the two ventilation interfaces and be discharged from the other one. When the gas is discharged from the other ventilation interface, it is discharged into the atmosphere through the exhaust hole of the control valve.

2. The emergency two-stage valve shrinkage and plugging fastening test device according to claim 1 is characterized in that: The simulation body comprises: A cylinder, wherein a breathing hole is provided at the top of the cylinder and a cylinder mouth is provided at the bottom of the cylinder; A lower cover is threadedly connected to the barrel mouth.

3. The emergency two-stage valve shrinkage and plugging fastening test device according to claim 1 is characterized in that: The vibration device comprises: at least one pneumatic vibrator connected to a second air source; A pressure regulating valve is arranged between the pneumatic vibrator and the second air source.

4. The emergency two-stage valve shrinkage and plugging fastening test device according to claim 1 is characterized in that: The emergency two-stage valve shrinkage and plugging fastening test device also includes: A seat plate, wherein the simulation body is arranged on the seat plate; A plurality of spring damping seats are distributed and connected to the bottom of the seat plate.

5. The emergency two-stage valve shrinkage and plugging fastening test device according to claim 4 is characterized in that: The emergency two-stage valve shrinkage and plugging fastening test device also includes at least one fixed plate, which is in an inverted L-shape, and the bottom of the fixed plate is connected to the top of the seat plate. The top and bottom of each simulation body are respectively against the top plate surface of the fixed plate and the top of the seat plate.

6. The emergency two-stage valve shrinkage and plugging fastening test device according to claim 2 is characterized in that: The lower cover comprises: Cover body; A stud, the bottom end of which is connected to the cover body, the stud is threadedly connected to the inner side of the barrel mouth, the top end of which can abut against the bottom end of the emergency two-stage valve and can abut the emergency two-stage valve to different braking positions.

7. The emergency two-stage valve shrinkage and plugging fastening test device according to claim 3 is characterized in that: The emergency two-stage valve shrinkage and plugging fastening test device also includes two pressure gauges and two valves, one of the pressure gauges and one of the valves are arranged between the pneumatic vibrator and the second air source, and the other pressure gauge and the other valve are arranged between the control valve and the first air source.

8. The emergency two-stage valve shrinkage and plugging fastening test device according to claim 3 is characterized in that: The pneumatic vibrator is a GT13 pneumatic turbine vibrator.

9. The emergency two-stage valve shrinkage and plugging fastening test device according to claim 3 is characterized in that: The first gas source and the second gas source are both 500KPa compressed air output gas sources.

10. The emergency two-stage valve shrinkage and plugging fastening test device according to claim 3, characterized in that: The number of the simulation body and the number of the pneumatic vibrators are both multiple, the multiple simulation bodies are connected in parallel, and the multiple pneumatic vibrators are connected in series.

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