A hand-held measuring device for calibrating the action value of a gas pressure switch of a motor train unit

Abstract

The utility model discloses a kind of EMU air pressure switch action value calibration hand-held measuring equipment, it is related to rail transit detection technical field.Handheld measuring equipment main body outside is provided with air pressure switch action detector and air pressure detection sensor, the detection end of air pressure detection sensor is provided with interference reduction mechanism, air pressure switch action detector outside is provided with fixed mechanism.Interference reduction mechanism is provided with interference reduction sponge, interference of air flow noise in high air pressure pipeline to air pressure detection sensor is reduced by interference reduction sponge setting;While abutting spring is provided between limiting ring and movable ring, by the buffering effect of movable ring and abutting spring, sponge layer can be self-adapting air flow pressure fluctuation, while reducing noise interference, high pressure air flow is avoided to cause damage to interference reduction sponge layer.Meanwhile, angle transmission adjusting mechanism is used to facilitate the adjustment of air pressure switch action detector, and further ensure that the device can meet the detection needs of different positions.

Description

Technical Field

[0001] This utility model relates to the field of rail transit testing technology, and in particular to a handheld measuring device for calibrating the action value of a high-speed train's air pressure switch. Background Technology

[0002] As a core control component of the EMU braking system, the air pressure switch undertakes critical functions such as monitoring total air pressure, triggering braking commands, and automatically opening and closing the brake hood. The accuracy of its action value directly affects the operational safety and reliability of the EMU. If the action value deviates, it may lead to serious consequences such as braking delay, false triggering, or failure of mechanical interlocks. Therefore, regular calibration is a necessary part of maintenance work.

[0003] However, traditional testing methods often suffer from large fluctuations and poor stability in sensor data acquisition due to airflow noise interference in high-pressure pipelines when measuring the actuation value of pneumatic switches, affecting the accuracy of calibration results. This problem not only increases the workload of maintenance personnel but also may create safety hazards due to measurement errors. Therefore, this application proposes a handheld measuring device for calibrating the actuation value of pneumatic switches in high-speed trains to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a handheld measuring device for calibrating the action value of a pneumatic switch on a high-speed train, which solves the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a handheld measuring device for calibrating the actuation value of a high-speed train's air pressure switch, comprising a main body of the handheld measuring device, an air pressure switch actuation detector and an air pressure detection sensor disposed on the outside of the main body of the handheld measuring device, both the air pressure switch actuation detector and the air pressure detection sensor being connected to the main body of the handheld measuring device via a data connection cable, an interference reduction mechanism disposed at the detection end of the air pressure detection sensor, a fixing mechanism disposed on the outside of the air pressure switch actuation detector, and a display screen and operation buttons disposed on the main body of the handheld measuring device;

[0006] The interference reduction mechanism includes an internally threaded connecting pipe, which is connected to the detection end of the air pressure sensor. An externally threaded connecting pipe is fixedly connected to the end of the internally threaded connecting pipe away from the air pressure sensor. Several interference reduction sponge layers are provided on the inner side of the externally threaded connecting pipe.

[0007] Preferably, two limiting rings are fixedly connected to the inner wall of the external threaded connecting pipe. A movable ring and several limiting slide rods are provided between the two limiting rings. The outer ends of several anti-interference sponge layers are fixedly connected to the inner wall of the movable ring. The two ends of the limiting slide rods are fixedly connected to the adjacent side walls of the two limiting rings respectively. The limiting slide rods pass through the movable ring and are slidably connected to the movable ring. Two abutting springs are sleeved on the limiting slide rods. The adjacent ends of the two abutting springs abut against the upper and lower ends of the movable ring respectively. The ends of the two abutting springs that are far apart from each other abut against the adjacent side walls of the two limiting rings respectively.

[0008] Preferably, the fixing mechanism includes a connecting cylinder, an outer protective frame is fixedly connected to the lower end of the connecting cylinder, a connecting suction cup is provided inside the outer protective frame, a connecting threaded rod is fixedly connected to the upper end of the connecting suction cup, the upper end of the connecting threaded rod passes through the upper side wall of the connecting cylinder and extends to the top of the connecting cylinder, an adjusting threaded knob is provided above the connecting cylinder, an internal threaded connecting groove is provided at the lower end of the adjusting threaded knob, the upper end of the connecting threaded rod extends into the internal threaded connecting groove and is threadedly connected to the internal threaded connecting groove, a connecting frame is fixedly connected to the outer side wall of the connecting cylinder, the connecting frame is L-shaped, an angle adjustment mechanism is provided on the connecting frame, and the connecting frame is connected to the air pressure switch action detector through the angle adjustment mechanism.

[0009] Preferably, the angle adjustment mechanism includes a connecting frame, the left end of the connecting frame is rotatably connected to the right side wall of the connecting frame via a damping shaft, the upper end of the pneumatic switch action detector extends to the inner side of the connecting frame, and the front and rear side walls of the pneumatic switch action detector are respectively rotatably connected to the front and rear side inner walls of the connecting frame via damping.

[0010] Preferably, the connecting threaded rod has two limiting grooves on its side wall, the connecting cylinder has two limiting grooves on its inner side wall, a limiting plate is provided inside the connecting cylinder, the connecting threaded rod passes through the limiting plate and is slidably connected to the limiting plate through the limiting grooves, and the outer end of the limiting plate is slidably connected to the connecting cylinder through the limiting grooves.

[0011] Preferably, a protective cover is provided on the front end of the handheld measuring device body, the operation button is located inside the protective cover, and an elastic restraint strap is provided on the rear end of the handheld measuring device body.

[0012] Compared with related technologies, the handheld measuring device for calibrating the actuation value of a high-speed train pneumatic switch provided by this utility model has the following advantages:

[0013] 1. This utility model provides a handheld measuring device for calibrating the action value of a high-speed train air pressure switch. In this device, an interference reduction mechanism is set at the detection end of the air pressure detection sensor, and an interference reduction sponge is set in the interference reduction mechanism. The interference reduction sponge reduces the interference of airflow noise in the high-pressure pipeline on the air pressure detection sensor. At the same time, a retaining spring is set between the limiting ring and the moving ring. Through the buffering effect of the moving ring and the retaining spring, the sponge layer can adapt to the airflow pressure fluctuations. While reducing noise interference, it also avoids damage to the interference reduction sponge layer caused by high-pressure airflow, thereby ensuring the service life of the device.

[0014] 2. This utility model provides a handheld measuring device for calibrating the action value of a pneumatic switch in a high-speed train. In this device, a fixing mechanism is provided on the outside of the pneumatic switch action detector, and an angle adjustment mechanism is provided between the fixing mechanism and the pneumatic switch action detector. During use, the suction cup in the fixing mechanism is used to fix the position between the angle adjustment mechanism and the pneumatic switch action detector. At the same time, the angle adjustment mechanism is used to facilitate the adjustment of the pneumatic switch action detector, thereby ensuring that the device can meet the detection requirements of different positions. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the interference reduction mechanism of this utility model;

[0017] Figure 3 This is a three-dimensional cross-sectional view of the interference reduction mechanism of this utility model;

[0018] Figure 4 This is a three-dimensional cross-sectional view of the external threaded connecting pipe of this utility model;

[0019] Figure 5 This is a three-dimensional structural diagram of the fixing mechanism of this utility model;

[0020] Figure 6 This is a cross-sectional three-dimensional structural diagram of the fixing mechanism of this utility model;

[0021] Figure 7 This is a three-dimensional structural diagram of the connecting suction cup of this utility model;

[0022] Figure 8 This is a schematic diagram showing the rear structure of the main body of the handheld measuring device of this utility model.

[0023] In the diagram: 1. Handheld measuring device body; 2. Display screen; 3. Operation buttons; 4. Protective cover; 5. Air pressure sensor; 6. Air pressure switch action detector; 7. Fixing mechanism; 8. Interference reduction mechanism; 9. Internal threaded connecting pipe; 10. External threaded connecting pipe; 11. Interference reduction sponge layer; 12. Limiting ring; 13. Movable ring; 14. Limiting slide rod; 15. Abutment spring; 16. Elastic restraint strap; 17. Connecting cylinder; 18. Outer protective frame; 19. Limiting plate; 20. Limiting slide groove one; 21. Connecting threaded rod; 22. Adjusting threaded knob; 23. Internal threaded connecting groove; 24. Connecting suction cup; 25. Limiting slide groove two; 26. Connecting frame; 27. Connecting frame. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-8 This utility model provides a technical solution: a handheld measuring device for calibrating the action value of a high-speed train air pressure switch, including a handheld measuring device body 1, an air pressure switch action detector 6 and an air pressure detection sensor 5 are provided on the outside of the handheld measuring device body 1, the air pressure switch action detector 6 and the air pressure detection sensor 5 are both connected to the handheld measuring device body 1 through a data connection cable, the detection end of the air pressure detection sensor 5 is provided with an interference reduction mechanism 8, the outside of the air pressure switch action detector 6 is provided with a fixing mechanism 7, the handheld measuring device body 1 is provided with a display screen 2 and an operation button 3, the front end of the handheld measuring device body 1 is provided with a protective cover 4, the operation button 3 is located inside the protective cover 4, and the rear end of the handheld measuring device body 1 is provided with an elastic restraint strap 16;

[0026] The interference reduction mechanism 8 includes an internal threaded connecting pipe 9, which is connected to the detection end of the air pressure detection sensor 5. An external threaded connecting pipe 10 is fixedly connected to the end of the internal threaded connecting pipe 9 away from the air pressure detection sensor 5. Several interference reduction sponge layers 11 are provided on the inner side of the external threaded connecting pipe 10. The interference reduction sponge layers 11 are used to reduce the interference of airflow noise in the high-pressure pipeline on the air pressure detection sensor 5.

[0027] Two limiting rings 12 are fixedly connected to the inner wall of the external threaded connecting pipe 10. A movable ring 13 and several limiting slide rods 14 are arranged between the two limiting rings 12. The outer ends of several anti-interference sponge layers 11 are fixedly connected to the inner wall of the movable ring 13. The two ends of the limiting slide rods 14 are fixedly connected to the adjacent side walls of the two limiting rings 12 respectively. The limiting slide rods 14 pass through the movable ring 13 and slide in a sliding connection with the movable ring 13. Two abutting springs 15 are sleeved on the limiting slide rods 14. The adjacent ends of the two abutting springs 15 abut against the upper and lower ends of the movable ring 13 respectively. The ends of the two abutting springs 15 that are far apart from each other abut against the adjacent side walls of the two limiting rings 12 respectively. Through the buffering effect of the movable ring 13 and the abutting springs 15, the anti-interference sponge layer 11 can adapt to the airflow pressure fluctuations. While reducing noise interference, it also avoids damage to the anti-interference sponge layer 11 caused by high-pressure airflow, thereby ensuring the service life of the device.

[0028] The fixing mechanism 7 includes a connecting cylinder 17. An outer protective frame 18 is fixedly connected to the lower end of the connecting cylinder 17. A connecting suction cup 24 is provided inside the outer protective frame 18. A connecting threaded rod 21 is fixedly connected to the upper end of the connecting suction cup 24. The upper end of the connecting threaded rod 21 penetrates the upper side wall of the connecting cylinder 17 and extends above the connecting cylinder 17. An adjusting threaded knob 22 is provided above the connecting cylinder 17. An internal threaded connecting groove 23 is formed at the lower end of the adjusting threaded knob 22. The upper end of the connecting threaded rod 21 extends into the internal threaded connecting groove 23 and is threadedly connected to the internal threaded connecting groove 23. A connecting frame 26 is fixedly connected to the outer side wall of the connecting cylinder 17. The connecting frame 26 is L-shaped and has an angle adjustment mechanism. The connection is made through an angle adjustment mechanism and a pneumatic switch action detector 6. Two limiting grooves 25 are provided on the side wall of the connecting threaded rod 21, and two limiting grooves 20 are provided on the inner side wall of the connecting cylinder 17. A limiting plate 19 is provided inside the connecting cylinder 17. The connecting threaded rod 21 passes through the limiting plate 19 and is slidably connected to the limiting plate 19 through the limiting grooves 25. The outer end of the limiting plate 19 is slidably connected to the connecting cylinder 17 through the limiting grooves 20. When in use, press the connecting suction cup 24 to fix the connecting suction cup 24 on the outer side wall of the equipment, and rotate the connecting cylinder 17. The connecting threaded rod 21 drives the middle position of the connecting suction cup 24 to move upward, thereby ensuring the connection between the connecting suction cup 24 and the outer side wall of the equipment.

[0029] The angle adjustment mechanism includes a connecting frame 27. The left end of the connecting frame 27 is rotatably connected to the right side wall of the connecting frame 26 via a damping shaft. The upper end of the pneumatic switch action detector 6 extends to the inside of the connecting frame 27, and the front and rear side walls of the pneumatic switch action detector 6 are respectively rotatably connected to the front and rear side inner walls of the connecting frame 27 via damping. The angle adjustment mechanism is achieved by setting the connecting frame 27, thereby ensuring that the device can meet the detection requirements of different positions.

[0030] Working principle: In use, the interference reduction mechanism 8 is connected to the air pressure detection sensor 5. During connection, the detection end of the air pressure detection sensor 5 is connected to the internal threaded connecting pipe 9 in the interference reduction mechanism 8, and the external threaded connecting pipe 10 connects the air pressure detection sensor 5 and the interference reduction mechanism 8 to the air pressure pipeline to be tested. An interference reduction sponge is provided in the interference reduction mechanism 8. The interference reduction sponge layer 11 reduces the interference of airflow noise in the high-pressure pipeline on the air pressure detection sensor 5. At the same time, a retaining spring 15 is provided between the limiting ring 12 and the movable ring 13. The buffering effect of the movable ring 13 and the retaining spring 15 is used to achieve the desired effect. This allows the anti-interference sponge layer 11 to adapt to airflow pressure fluctuations, reducing noise interference while preventing damage to the anti-interference sponge layer 11 from high-pressure airflow, thus ensuring the service life of the device. At the same time, pressing the connecting suction cup 24 fixes the connecting suction cup 24 to the outer wall of the device, and rotating the connecting cylinder 17 moves the middle position of the connecting suction cup 24 upward through the connecting threaded rod 21, thus ensuring the connection between the connecting suction cup 24 and the outer wall of the device. The angle adjustment mechanism is achieved by setting the connecting frame 27, thereby realizing the angle adjustment of the air pressure switch action detector 6, thus ensuring that the device can meet the detection requirements of different positions.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hand-held measuring device for calibrating the action value of a pneumatic switch of a motor train unit, comprising a hand-held measuring device body (1), characterized in that: The handheld measuring device body (1) is provided with a pneumatic switch action detector (6) and a pneumatic detection sensor (5) on the outside. The pneumatic switch action detector (6) and the pneumatic detection sensor (5) are both connected to the handheld measuring device body (1) through a data connection cable. The detection end of the pneumatic detection sensor (5) is provided with an interference reduction mechanism (8). The pneumatic switch action detector (6) is provided with a fixing mechanism (7) on the outside. The handheld measuring device body (1) is provided with a display screen (2) and operation buttons (3). The interference reduction mechanism (8) includes an internal threaded connecting pipe (9), which is connected to the detection end of the air pressure detection sensor (5). An external threaded connecting pipe (10) is fixedly connected to one end of the internal threaded connecting pipe (9) away from the air pressure detection sensor (5). Several interference reduction sponge layers (11) are provided on the inner side of the external threaded connecting pipe (10).

2. The hand-held measuring device for calibrating the action value of the air pressure switch of a motor train unit according to claim 1, characterized in that: Two limiting rings (12) are fixedly connected to the inner wall of the external threaded connecting pipe (10). A movable ring (13) and several limiting slide rods (14) are provided between the two limiting rings (12). The outer ends of several anti-interference sponge layers (11) are fixedly connected to the inner wall of the movable ring (13). The two ends of the limiting slide rods (14) are fixedly connected to the adjacent side walls of the two limiting rings (12). The limiting slide rods (14) pass through the movable ring (13) and are slidably connected to the movable ring (13). Two abutting springs (15) are sleeved on the limiting slide rods (14). The adjacent ends of the two abutting springs (15) abut against the upper and lower ends of the movable ring (13) respectively. The ends of the two abutting springs (15) that are far apart from each other abut against the adjacent side walls of the two limiting rings (12) respectively.

3. The hand-held measuring device for calibrating the action value of the air pressure switch of a motor train unit according to claim 1, characterized in that: The fixing mechanism (7) includes a connecting cylinder (17), with an outer protective frame (18) fixedly connected to the lower end of the connecting cylinder (17). A connecting suction cup (24) is provided inside the outer protective frame (18), and a connecting threaded rod (21) is fixedly connected to the upper end of the connecting suction cup (24). The upper end of the connecting threaded rod (21) penetrates the upper side wall of the connecting cylinder (17) and extends above the connecting cylinder (17). An adjusting threaded knob (22) is provided above the connecting cylinder (17). The lower end of the adjusting screw knob (22) is provided with an internal threaded connection groove (23). The upper end of the connecting screw rod (21) extends into the internal threaded connection groove (23) and is threadedly connected to the internal threaded connection groove (23). A connecting frame (26) is fixedly connected to the outer wall of the connecting cylinder (17). The connecting frame (26) is L-shaped and is provided with an angle adjustment mechanism. The connecting frame (26) is connected to the air pressure switch action detector (6) through the angle adjustment mechanism.

4. A handheld measuring device for calibrating the actuation value of a high-speed train pneumatic switch according to claim 3, characterized in that: The angle adjustment mechanism includes a connecting frame (27), the left end of the connecting frame (27) is rotatably connected to the right side wall of the connecting frame (26) through a damping shaft, the upper end of the pneumatic switch action detector (6) extends to the inside of the connecting frame (27), and the front and rear side walls of the pneumatic switch action detector (6) are respectively rotatably connected to the front and rear side inner walls of the connecting frame (27) through damping.

5. A handheld measuring device for calibrating the actuation value of a high-speed train pneumatic switch according to claim 3, characterized in that: Two limiting grooves (25) are provided on the side wall of the connecting threaded rod (21), and two limiting grooves (20) are provided on the inner side wall of the connecting cylinder (17). A limiting plate (19) is provided inside the connecting cylinder (17). The connecting threaded rod (21) passes through the limiting plate (19) and is slidably connected to the limiting plate (19) through the limiting grooves (25). The outer end of the limiting plate (19) is slidably connected to the connecting cylinder (17) through the limiting grooves (20).

6. The handheld measuring device for calibrating the actuation value of a pneumatic switch in a high-speed train according to claim 1, characterized in that: The handheld measuring device body (1) is provided with a protective cover (4) at the front end, the operation button (3) is located inside the protective cover (4), and the handheld measuring device body (1) is provided with an elastic restraint strap (16) at the rear end.

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