Automatic air tightness detection device for air spring
By designing an automatic air tightness detection device for air springs, the problem of air spring leakage after bogie maintenance was solved, the reliability detection of air springs was achieved, and the production efficiency and safety of subway vehicles were improved.
Patent Information
- Application Number
- CN202422957355.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-12-02
AI Technical Summary
After the bogie was outsourced for maintenance, the air springs of the subway vehicles leaked due to inadequate quality control measures or improper transportation protection from the outsourced supplier, resulting in a large amount of rework.
An automatic air tightness detection device for air springs is designed, which includes a fixing frame, an air spring, an air inlet connection end, a connecting pipe, a pressure gauge, a two-position three-way valve, a pressure regulating valve, a one-way throttle valve, a shut-off valve and an air compressor. Through the combination of these components, the air tightness test of the air spring is realized to ensure that the compressed air circulates in one direction within the required range. The connecting pipes are tightly connected by sealing gaskets, clamps and fixing bolts.
It improves the production efficiency and safety of subway vehicle bogies, ensures the reliability and ease of operation of air spring air tightness testing, and reduces rework.
Smart Images
Figure CN223426193U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automatic air tightness detection of air springs, in particular to an automatic air tightness detection device for air springs. Background Art
[0002] The automatic air tightness detection device for air springs is an important device used to test the air tightness of air springs. The device uses an automated process to detect the air tightness of air springs under a certain pressure to ensure their safety and reliability during operation.
[0003] At present, after the bogie is outsourced for maintenance, due to the outsourced supplier's inadequate quality control measures or improper transportation protection, it is easy to cause air leakage in the air spring after the subway vehicle wheels fall off, resulting in a large amount of rework.
[0004] Therefore, we propose an automatic air tightness detection device for air springs to solve the above-mentioned problems. Utility Model Content
[0005] The purpose of the present invention is to provide an automatic air tightness detection device for air springs, so as to solve the problem proposed in the above-mentioned background technology that after the bogie is outsourced for maintenance, due to the inadequate quality control measures of the outsourced supplier or improper transportation protection, air leakage of the air springs after the wheels of the subway vehicle are dropped off, resulting in a large amount of rework.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic air tightness detection device for an air spring, comprising a fixing frame and an air spring arranged at the upper end of the fixing frame, the upper end of the air spring is provided with an air spring intake connection end for air intake, the air spring intake connection end is connected to a connecting pipeline, a two-position three-way valve, a pressure regulating valve, a one-way throttle valve and a shut-off valve are arranged on the connecting pipeline, the two-position three-way valve, the pressure regulating valve, the one-way throttle valve and the shut-off valve are sequentially distributed on the connecting pipeline, an end of the connecting pipeline away from the air spring intake connection end is connected to an air compressor, the air compressor is used to compress gas, and can provide sufficient compressed air for the air tightness test of the air spring, the shut-off valve The door is used to control the air compressor to fill the air spring with air, and controls the cut-off and opening of the air spring air tightness test passage respectively. The one-way throttle valve is used to provide one-way stable compressed air for the air spring air tightness test. The pressure regulating valve is used for flow regulation control. The two-position three-way valve is used to control the air path to change the flow direction, providing a safe channel for the discharge of compressed air after the air spring air tightness test. A pressure gauge for pressure measurement is also provided on the connecting pipeline. The air compressor serves as the air source to provide compressed air for the device, and the cut-off valve controls the pipeline to be open and closed. The one-way flow of air is ensured through the one-way throttle valve and the pressure regulating valve. The pressure value is within the required range of the air spring, and the actual pressure of the connecting pipeline is displayed on the pressure gauge.
[0007] Preferably, the fixing frame includes an upper frame and a lower cross bar arranged below the upper frame, and surrounding spring devices are arranged on the outer sides of the upper frame and the lower cross bar, and the upper frame and the lower cross bar are connected by the surrounding spring devices.
[0008] Preferably, the surrounding spring device includes a mounting hole and a mounting seat arranged on one side of the mounting hole. There are two groups of mounting seats, and a spring member is arranged between the two groups of mounting seats. A mounting bolt is provided on one side of the mounting seat. The mounting bolt passes through the mounting seat and is inserted into the mounting hole. The position of the spring member can be fixed so that the surrounding spring device is placed on the outside of the upper frame and the lower cross bar.
[0009] Preferably, the mounting holes are respectively opened on the side walls of the upper frame and the lower cross bar, and the mounting holes are used for cooperation with the mounting bolts.
[0010] Preferably, a sealing gasket is provided on the outer side of one end of the connecting pipe close to the air spring air intake connecting end, and the sealing gasket can be deformed when the connecting pipe is inserted into the air spring air intake connecting end.
[0011] Preferably, a clamp is provided on the outside of the air spring air intake connection end, and mounting blocks are respectively installed at both ends of the clamp. Fixing bolts are provided on the surface of the mounting block. One end of the connecting pipe is inserted into the air spring air intake connection end, sealed with a sealing gasket, and fixed with the help of the clamp, mounting block and fixing bolts.
[0012] Compared with the prior art, the beneficial effects of the present invention are:
[0013] 1. Through the setting of the fixing frame, air spring, air spring air intake connection end, connecting pipeline, pressure gauge, two-position three-way valve, pressure regulating valve, one-way throttle valve, shut-off valve and air compressor, the air compressor serves as the wind source to provide compressed air for the device, the shut-off valve controls the on-off of the pipeline, and the one-way throttle valve and pressure regulating valve ensure one-way air circulation. The pressure value is within the required range of the air spring, and the actual pressure of the connecting pipeline is displayed on the pressure gauge. The air intake tooling is connected to ensure that the air spring air intake port is sealed to obtain the required compressed air, thereby achieving the air tightness test function. It has the advantages of simple structure, easy operation, strong versatility, safety and reliability, and effectively improves the production efficiency and safety quality of subway vehicle frames and overhauls.
[0014] 2. Through the provided connecting pipe, sealing gasket, clamp, mounting block and fixing bolt, insert one end of the connecting pipe into the air spring intake connection end, and fix it with the clamp, mounting block and fixing bolt, and seal it with the sealing gasket to make the connection tight and the sealing good, which is convenient for detection and use. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;
[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the fixing frame of the present utility model;
[0017] Figure 3 This is the air circuit diagram of the air spring air tightness test device of the utility model;
[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the connecting pipeline of the present invention.
[0019] In the figure: 1. Fixing frame; 11. Upper frame; 12. Lower cross bar; 13. Spring device around; 131. Mounting hole; 132. Mounting seat; 133. Spring member; 134. Mounting bolt; 2. Air spring; 3. Air spring inlet connection end; 4. Connecting pipe; 41. Pressure gauge; 42. Sealing gasket; 43. Clamp; 44. Mounting block; 45. Fixing bolt; 5. Two-position three-way valve; 6. Pressure regulating valve; 7. One-way throttle valve; 8. Shut-off valve; 9. Air compressor. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.
[0021] Example 1: Please refer to Figure 1 、 Figure 2 and Figure 3, an automatic air tightness detection device for an air spring comprises a fixing frame 1 and an air spring 2 arranged at the upper end of the fixing frame 1, an upper end of the air spring 2 is provided with an air spring intake connection end 3 for air intake, the air spring intake connection end 3 is connected to a connecting pipe 4, the connecting pipe 4 is provided with a two-position three-way valve 5, a pressure regulating valve 6, a one-way throttle valve 7 and a shut-off valve 8, the two-position three-way valve 5, the pressure regulating valve 6, the one-way throttle valve 7 and the shut-off valve 8 are sequentially distributed on the connecting pipe 4, and an end of the connecting pipe 4 away from the air spring intake connection end 3 is connected to an air compressor 9, the air compressor 9 is used to compress gas and can provide sufficient compressed air for the air tightness test of the air spring 2, the shut-off valve 8 is used to control the air compressor 9 to charge the air passage of the air spring 2, respectively. Control the cutoff and opening of the air spring air tightness test passage. The one-way throttle valve 7 is used to provide one-way stable compressed air for the air spring air tightness test. The pressure regulating valve 6 is used for flow regulation control. The two-position three-way valve 5 is used to control the air path to change the flow direction, providing a safe channel for the compressed air to be discharged after the air spring air tightness test is completed. A pressure gauge 41 for pressure measurement is also provided on the connecting pipeline 4. The air compressor 9 provides compressed air for the device as a wind source. The cut-off valve 8 controls the pipeline to be open and close. The one-way flow of air is guaranteed through the one-way throttle valve 7 and the pressure regulating valve 6. The pressure value is within the required range of the air spring 2. The actual pressure of the connecting pipeline 4 is displayed on the pressure gauge 41. The air intake tooling is connected to ensure that the air spring inlet is sealed to obtain the required compressed air to achieve the air tightness test function.
[0022] The fixing frame 1 includes an upper frame 11 and a lower cross bar 12 arranged below the upper frame 11. Spring devices 13 are arranged on the outer sides of the upper frame 11 and the lower cross bar 12. The upper frame 11 and the lower cross bar 12 are connected by the spring devices 13. The fixing frame 1 is used to fix the bogie group air spring 2 and adjust the height change of the air spring 2 in the inflated and exhausted states to ensure the normal compressed air passage.
[0023] The surrounding spring device 13 includes a mounting hole 131 and a mounting seat 132 arranged on one side of the mounting hole 131. There are two groups of mounting seats 132. A spring member 133 is arranged between the two groups of mounting seats 132. A mounting bolt 134 is provided on one side of the mounting seat 132. The mounting bolt 134 passes through the mounting seat 132 and is inserted into the mounting hole 131. The position of the spring member 133 can be fixed so that the surrounding spring device 13 is placed on the outside of the upper frame 11 and the lower cross bar 12.
[0024] The mounting holes 131 are respectively formed on the side walls of the upper frame 11 and the lower crossbar 12 . The mounting holes 131 are used to cooperate with the mounting bolts 134 .
[0025] In this embodiment: the air compressor 9 serves as an air source to provide compressed air for the device, the shut-off valve 8 controls the on-off of the pipeline, and the one-way flow of air is ensured through the one-way throttle valve 7 and the pressure regulating valve 6. The pressure value is within the required range of the air spring 2. The actual pressure of the connecting pipeline 4 is displayed on the pressure gauge 41. The air intake tooling is connected to ensure that the air spring inlet is sealed to obtain the required compressed air, thereby achieving the air tightness test function. The spring device 13 around the fixed frame 1 can adapt to the change in the height of the air spring 2, ensuring that the compressed air passage is normal, and realizing the air tightness test of the bogie air spring 2. It has the advantages of simple structure, easy operation, strong versatility, safety and reliability, etc., effectively improving the production efficiency and safety quality of subway vehicle frames and overhauls.
[0026] Example 2: This example is an improvement made on the basis of Example 1. For details, please refer to Figure 4 A sealing gasket 42 is provided on the outer side of one end of the connecting pipe 4 close to the air spring air intake connecting end 3. When the connecting pipe 4 is inserted into the air spring air intake connecting end 3, the sealing gasket 42 can be deformed, so that the connection between the connecting pipe 4 and the air spring air intake connecting end 3 is tighter.
[0027] A clamp 43 is provided on the outside of the air spring intake connection end 3, and mounting blocks 44 are respectively installed at both ends of the clamp 43. Fixing bolts 45 are provided on the surface of the mounting block 44. One end of the connecting pipe 4 is inserted into the air spring intake connection end 3, sealed with a sealing gasket 42, and fixed with the help of the clamp 43, the mounting block 44 and the fixing bolts 45 to achieve a sealed connection and avoid air leakage during detection.
[0028] In this embodiment: one end of the connecting pipe 4 is inserted into the empty spring air intake connecting end 3, and is fixed with the help of a clamp 43, a mounting block 44 and a fixing bolt 45. When the connecting pipe 4 is inserted into the empty spring air intake connecting end 3, the sealing gasket 42 can be deformed, so that the connecting pipe 4 and the empty spring air intake connecting end 3 are connected more tightly, which can effectively play a sealing role, thereby achieving the purpose of sealing connection, avoiding detection, and facilitating use.
[0029] Working principle: The air compressor 9 serves as the wind source to provide compressed air for the device, and the shut-off valve 8 controls the on-off of the pipeline. The one-way flow of air is ensured through the one-way throttle valve 7 and the pressure regulating valve 6. The pressure value is within the required range of the air spring 2. The actual pressure of the connecting pipeline 4 is displayed on the pressure gauge 41. The air intake tooling is connected to ensure that the air spring air inlet is sealed to obtain the required compressed air, thereby achieving the air tightness test function. The spring device 13 around the fixing frame 1 can adapt to the change in the height of the air spring 2 to ensure that the compressed air passage is normal. One end of the connecting pipeline 4 is inserted into the air spring air intake connection end 3 and fixed with the help of the clamp 43, the mounting block 44 and the fixing bolt 45. When the connecting pipeline 4 is inserted into the air spring air intake connection end 3, the sealing gasket 42 can be deformed, so that the connecting pipeline 4 and the air spring air intake connection end 3 are connected more tightly, which can effectively play a sealing role.
[0030] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. An automatic air tightness detection device for an air spring, comprising a fixing frame (1) and an air spring (2) arranged at the upper end of the fixing frame (1), wherein the upper end of the air spring (2) is provided with an air spring air intake connection end (3) for air intake, characterized in that: The air spring air inlet connection end (3) is connected to a connection pipe (4), and a two-position three-way valve (5), a pressure regulating valve (6), a one-way throttle valve (7) and a shut-off valve (8) are provided on the connection pipe (4). The two-position three-way valve (5), the pressure regulating valve (6), the one-way throttle valve (7) and the shut-off valve (8) are sequentially distributed on the connection pipe (4). An end of the connection pipe (4) away from the air spring air inlet connection end (3) is connected to an air compressor (9). The air compressor (9) is used to compress gas and can be used for air tightness testing of the air spring (2). Provide sufficient compressed air, the shut-off valve (8) is used to control the air compressor (9) to charge the air spring (2) and control the shut-off and opening of the air spring air tightness test passage respectively. The one-way throttle valve (7) is used to provide one-way stable compressed air for the air spring air tightness test. The pressure regulating valve (6) is used for flow regulation control. The two-position three-way valve (5) is used to control the air path to change the flow direction and provide a safe channel for the compressed air to be discharged after the air spring air tightness test is completed. A pressure gauge (41) for pressure measurement is also provided on the connecting pipe (4).
2. The automatic air tightness detection device for an air spring according to claim 1, characterized in that: The fixing frame (1) comprises an upper frame (11) and a lower cross bar (12) arranged below the upper frame (11), and surrounding spring devices (13) are arranged on the outer sides of the upper frame (11) and the lower cross bar (12).
3. The automatic air tightness detection device for an air spring according to claim 2, characterized in that: The surrounding spring device (13) includes a mounting hole (131) and a mounting seat (132) arranged on one side of the mounting hole (131). Two groups of mounting seats (132) are provided. A spring member (133) is provided between the two groups of mounting seats (132). A mounting bolt (134) is provided on one side of the mounting seat (132).
4. The automatic air tightness detection device for an air spring according to claim 3, characterized in that: The mounting holes (131) are respectively formed on the side walls of the upper frame (11) and the lower crossbar (12).
5. The automatic air tightness detection device for an air spring according to claim 4, characterized in that: A sealing gasket (42) is provided on the outer side of one end of the connecting pipe (4) close to the air spring intake connection end (3).
6. The automatic air tightness detection device for an air spring according to claim 5, characterized in that: A clamp (43) is provided on the outside of the air spring air inlet connection end (3), mounting blocks (44) are respectively installed at both ends of the clamp (43), and fixing bolts (45) are provided on the surface of the mounting blocks (44).