Air leakage detector for air pipe joint of electric locomotive

Abstract

An air leakage detector for an air pipe joint of an electric locomotive relates to the field of railway locomotive detection equipment and comprises a detector main body, an operating rod assembly, a clamping assembly and an observation assembly, the operating rod assembly comprises an extension rod and a driving rod, the driving rod is slidably installed in the extension rod, a limiting groove is formed in the side wall, away from the handheld end, of the extension rod in a penetrating mode, and a limiting connecting part is arranged at the end, away from the handheld end, of the driving rod; the tail of the clamping assembly is connected with the limiting connecting part, the head of the clamping assembly is used for wrapping and clamping the air pipe connector, and the tail of the clamping assembly is driven by the sliding driving rod to slide back and forth along the limiting groove, so that the head of the clamping assembly is opened and closed in the sliding process to clamp the air pipe connector. The observation component is rotationally connected with the front end outer surface of the extension rod; the detector body is installed on the side of the operating rod assembly and comprises a sound wave frequency probe and a sound wave vibration probe. The air leakage detection device can accurately detect the air leakage phenomenon of a pipeline system, efficiently identify hidden air leakage positions, facilitate timely treatment and ensure driving safety.

Description

Technical Field

[0001] This utility model relates to the field of railway locomotive testing equipment, and in particular to a leak detector for air duct joints of electric locomotives. Background Technology

[0002] The air duct joints of electric locomotives and their tractors are critical components ensuring the proper functioning of the entire train's braking system. Air duct joint leakage detectors can accurately detect any gas leaks at the joints. During train operation, the locomotive uses the air ducts to transmit compressed air throughout the train for braking.

[0003] If air leaks in the ductwork joints inside the locomotive or between cars, it can lead to insufficient pressure in the train's braking system, affecting braking performance. Current technology relies on manual methods such as listening and touching to determine leaks, which can easily result in inaccurate findings. Furthermore, DC electric locomotives have floors on both sides of the machinery compartment, beneath which lies a complex piping system, meaning some potential leaks are located in hard-to-reach areas. Traditional inspection methods struggle to cover all suspicious areas, especially those hidden from view. Failure to promptly detect and repair these hidden leaks can cause a continuous drop in braking system pressure, potentially leading to locomotive or train brake failure, increasing maintenance costs, and seriously threatening operational safety. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an air leakage detector for air duct joints of electric locomotives, which can accurately detect air leakage in the pipeline system and efficiently identify and judge hidden air leakage points, so as to facilitate timely handling by operators, reduce the risk of failure, and ensure driving safety.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a leakage detector for duct joints of electric locomotives, comprising a detector body, an operating lever assembly, a clamping assembly, and an observation assembly; the operating lever assembly includes an extension rod and a drive rod, the drive rod being slidably installed inside the extension rod, a limiting groove being formed through the side wall of the extension rod away from the handheld end, and a limiting connecting component being provided at the end of the drive rod away from the handheld end; the tail of the clamping assembly is connected to the limiting connecting component, and the head of the clamping assembly is used to wrap and clamp the duct joint, and the tail of the clamping assembly is driven to slide back and forth along the limiting groove by the sliding drive rod, so that the head of the clamping assembly gradually opens or closes during the sliding process to clamp the duct joint; the observation assembly is rotatably connected to the outer surface of the front end of the extension rod for observing the detection position; the detector body is installed on the side of the operating lever assembly and includes an acoustic frequency probe located on the top of the detector body and an acoustic vibration probe located at the front end of the extension rod.

[0006] As a preferred embodiment, the clamping assembly includes two driven plates and two clamping heads. One end of the driven plate is rotatably sleeved on the limiting connecting member, and the other end and the tail of the clamping head are intersected and overlapped in a rhomboid shape and connected by a connecting rivet. A limiting pin passes through the intersection of the tails of the clamping heads, and the limiting pin also passes through the extension rod. The clamping assembly can rotate around the central axis of the limiting pin.

[0007] As a preferred embodiment, the limiting connection component includes a connecting bolt and two limiting connecting blocks. One side of the two limiting connecting blocks is fixed to both sides of the end of the drive rod, and the other side is slidably disposed in the limiting groove. The connecting bolt is fixed between the two limiting connecting blocks, and one end of the driven piece is rotatably sleeved on the connecting bolt. A comb body is provided on the surface of the limiting connecting block facing the same direction as the detector body, and the comb body is in the shape of a circular hole.

[0008] As a preferred embodiment, a flexible shielding sheet is fixed to the inner surface of the clamping head.

[0009] As a preferred embodiment, the extension rod includes a cylinder and a first handle disposed at one end of the rod, and the drive rod includes a rod and a second handle disposed at one end of the rod. The first handle has symmetrically formed positioning grooves along the axial direction of the cylinder to restrict the movement of the second handle along the axial direction.

[0010] As a preferred embodiment, the end of the limiting groove away from the second handle of the drive rod has a circular placement groove, and the front end of the limiting groove is provided with a fixing member for installing the observation component. The fixing member is a hollow hemispherical shape.

[0011] As a preferred embodiment, the observation assembly includes an observation mirror and a connector. One end of the connector is a spherical structure that can be rotated at multiple angles within the fixing member, and the other end is fixedly connected to the observation mirror.

[0012] As a preferred embodiment, the operating lever assembly is provided with a receiving device on its side, and the main body of the detector is detachably installed inside the receiving device.

[0013] As a preferred embodiment, the main body of the detector includes a detector housing, an acoustic frequency probe, an acoustic vibration probe, a detection button, and a sensitivity adjustment knob. The sensitivity adjustment knob and multiple detection buttons are located on the front of the detector housing. The acoustic frequency probe is fixed to the top of the detector housing. The acoustic vibration probe is located in a placement slot and is connected to one side of the detector housing via a wire, with the wire passing through the comb body.

[0014] As a preferred embodiment, an earphone is installed on the side of the detector housing away from the acoustic vibration probe.

[0015] Based on the above technical solution, the beneficial effects of this utility model are:

[0016] 1. Compared with the prior art, this utility model can improve detection accuracy and working environment safety: by using a clamping assembly to fix the acoustic vibration probe and setting a flexible shielding sheet inside the clamping head to directly wrap the electric locomotive air duct joint, this method effectively isolates unnecessary acoustic vibrations from the external environment, reduces external interference, and ensures that the acoustic vibration probe can accurately capture real air leakage fluctuations. This not only improves detection accuracy but also provides a quiet working environment for the testing personnel, avoids misjudgments caused by external interference, and reduces the risk of hearing damage to the testing personnel.

[0017] 2. Enhanced structural stability and operational flexibility: Combining the operating lever assembly and clamping assembly, the drive lever can slide within the extension rod. The limiting connection component and limiting groove ensure the stability and balance of the overall structure, preventing misoperation or data deviation caused by external vibration or collision. Furthermore, the operating lever assembly is equipped with an adjustable-angle observation component, allowing inspectors to flexibly adjust the angle of the operating lever assembly according to different inspection positions to obtain the optimal viewing angle. It is suitable for the complex duct joint inspection needs of various work types such as locomotive maintenance and train inspection, accurately identifying hidden air leaks, significantly improving inspection efficiency and applicability, and ensuring the stability and balance of the overall structure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a structural schematic diagram of the present invention from another angle;

[0020] Figure 3 This is a schematic diagram of the clamping assembly and drive rod in this utility model;

[0021] Figure 4 This is a schematic diagram of the extension rod and observation mirror in this utility model;

[0022] Figure 5 This is a schematic diagram of the extension rod and the other side of the observation mirror in this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the connecting bolt, comb body and limiting connecting block in this utility model.

[0024] The following components are labeled in the diagram: 1. Main body of the detector; 2. Operating lever assembly; 3. Clamping assembly; 4. Limiting pin; 5. Extension rod; 6. Drive rod; 7. Fixing component; 8. Limiting groove; 9. Driven piece; 10. Clamping head; 11. Connecting rivet; 12. Connecting bolt; 13. Limiting connecting block; 14. Comb body; 15. Detector housing; 16. Acoustic frequency probe; 17. Acoustic vibration probe; 18. Detection button; 19. Sensitivity adjustment knob; 20. Wire; 21. Observation mirror; 22. Connector; 23. Flexible shielding sheet; 24. Receiving device; 25. Placement slot; 26. Earphone. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0027] It should also be noted that, unless otherwise stated, "multiple" means two or more; the terms "upper," "lower," "left," "right," "front end," "rear end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Changes or adjustments to the relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0028] like Figures 1 to 6 As shown, an air leakage detector for air duct joints of electric locomotives includes a detector body 1, an operating lever assembly 2, a clamping assembly 3, and an observation assembly.

[0029] The operating lever assembly 2 includes an extension rod 5 and a drive rod 6. The drive rod 6 is slidably installed inside the extension rod 5. A limiting groove 8 is formed through the side wall of the extension rod 5 away from the hand-held end. A limiting connection component is provided at the end of the drive rod 6 away from the hand-held end.

[0030] The tail of the clamping component 3 is connected to the limiting connection component, and the head of the clamping component 3 is used to wrap and clamp the air duct connector. The tail of the clamping component 3 is driven to slide back and forth along the limiting groove 8 by the sliding drive rod 6, so that the head of the clamping component 3 gradually opens or closes during the sliding process to clamp the air duct connector.

[0031] The clamping assembly 3 includes two driven plates 9 and two clamping heads 10. One end of the driven plate 9 is rotatably sleeved on the limiting connection component, and the other end and the tail of the clamping head 10 are intersected and overlapped in a rhomboid shape and connected by a connecting rivet 11. A limiting pin 4 passes through the overlapping part of the tail of the clamping head 10. The limiting pin 4 also passes through the extension rod 5, and the clamping assembly 3 can rotate around the central axis of the limiting pin 4 to adapt to the clamping requirements of duct joints of different angles and sizes.

[0032] In this embodiment, the limiting connection component includes a connecting bolt 12 and two limiting connecting blocks 13. One side of the two limiting connecting blocks 13 is fixed to both sides of the end of the drive rod 6, and the other side is slidably disposed in the limiting groove 8. The connecting bolt 12 is fixed between the two limiting connecting blocks 13, and one end of the driven piece 9 is rotatably sleeved on the connecting bolt 12. A comb body 14 is provided on the side surface of the limiting connecting block 13 that is in the same direction as the detector body 1. The comb body 14 is in the shape of a round hole.

[0033] Specifically, when the drive rod 6 slides toward the hand-held end, the limiting connecting component on the drive rod 6 slides in the limiting groove 8 toward the hand-held end, causing the driven piece 9 of the clamping assembly 3 and the tail of the clamping head 10 to move closer to each other, that is, the included angle between the driven piece 9 and the tail of the clamping head 10 gradually decreases, and the head of the clamping head 10 gradually opens. When the drive rod 6 slides in the opposite direction toward the hand-held end, the limiting connecting component on the drive rod 6 slides in the limiting groove 8 in the opposite direction toward the hand-held end, causing the driven piece 9 of the clamping assembly 3 and the tail of the clamping head 10 to move away from each other, that is, the included angle between the driven piece 9 and the tail of the clamping head 10 gradually increases, and the head of the clamping head 10 gradually closes.

[0034] A flexible shielding sheet 23 is fixed to the inner surface of the clamping head 10 to tightly wrap the electric locomotive duct joint, ensuring accurate detection by the acoustic vibration probe 17 during the testing process. This structure can effectively suppress unnecessary acoustic interference generated when the testing personnel adjust the position, making the identification of air leakage fluctuation signals more focused and accurate.

[0035] Specifically, the extension rod 5 includes a cylindrical body and a first handle disposed at one end of the rod body, and the drive rod 6 includes a rod body and a second handle disposed at one end of the rod body. The first handle has symmetrically arranged positioning grooves along the axis of the cylindrical body to restrict the movement of the second handle along the axis. In this embodiment, the first handle is a triangular handle, and the second handle is a cylindrical handle. Two positioning grooves are symmetrically arranged on the two sides of the triangular handle along the axis of the cylindrical body, and the two ends of the cylindrical handle pass through the two positioning grooves and are slidably limited within the positioning grooves.

[0036] In this embodiment, the cross-sectional radius of the drive rod 6 is smaller than the cross-sectional radius of the extension rod 5, ensuring that the drive rod 6 slides back and forth on the extension rod 5; the opening shape of the limiting groove 8 is a square with rounded corners, and the opening shape of the positioning groove is an ellipse.

[0037] The limiting groove 8 has a circular placement groove 25 at one end away from the second handle of the drive rod 6. The front end of the limiting groove 8 is provided with a fixing member 7 for installing the observation component. The fixing member 7 is a hollow hemispherical shape.

[0038] The observation component is rotatably connected to the outer surface of the front end of the extension rod 5 for observing and detecting the position. The observation component includes an observation mirror 21 and a connecting body 22. One end of the connecting body 22 is a spherical structure that can be rotatably disposed within the fixing member 7 at multiple angles, and the other end is fixedly connected to the observation mirror 21.

[0039] The main body 1 of the detector is mounted on the side of the operating lever assembly 2. Specifically, the side of the operating lever assembly 2 is provided with a receiving device 24, and the main body 1 of the detector is detachably installed inside the receiving device 24.

[0040] The main body 1 of the detector includes a detector housing 15, an acoustic frequency probe 16, an acoustic vibration probe 17, a detection button 18, a sensitivity adjustment knob 19, and a wire 20. The sensitivity adjustment knob 19 and multiple detection buttons 18 are located on the front of the detector housing 15. The acoustic frequency probe 16 is fixed to the top of the detector housing 15. The acoustic vibration probe 17 is located in the placement groove 25 at the front end of the extension rod 5 and is connected to one side of the detector housing 15 via the wire 20. The wire 20 passes through a comb body 14, which constrains the path of the wire 20 and prevents it from tangling with the operating rod assembly 2. Specifically, the diameter of the circular hole in the comb body 14 is larger than the outer diameter of the wire 20 to ensure smooth sliding of the wire. Specifically, the placement groove 25 is circular, and the radius of the placement groove 25 is larger than the radius of the acoustic frequency probe 16.

[0041] An earphone 26 is installed on the side of the detector housing 15 away from the acoustic vibration probe 17.

[0042] When using this invention to inspect locomotive air duct joints, the specific working principle is as follows:

[0043] First, the inspector installs the main body 1 of the detector into the housing 24. Then, one end of the wire 20 is connected to the acoustic vibration probe 17, and the other end is connected to the main body 1 of the detector. After passing the acoustic vibration probe 17 and the wire 20 through the comb body 14, the acoustic vibration probe 17 is placed in the placement slot 25. Next, depending on the different detection positions and environments, the inspector adjusts the angle of the connecting body 22 connected to the observation mirror 21. Since the connecting body 22 is spherical and has one end that can rotate at multiple angles within the hollow fixing part 7, the direction of the observation mirror 21 can be flexibly adjusted for better observation of the detection area. Afterward, the two clamping heads 10, along with the flexible shielding sheets 23 on their inner surfaces, are brought closer to the detection area. By pulling the drive rod 6 inside the extension rod 5, the drive rod 6 drives the two driven pieces 9 and the two clamping heads 10 to move closer together, so that the two clamping heads 10 use the flexible shielding sheets 23 to wrap and cover the detection area, forming a relatively closed detection environment and reducing external interference.

[0044] After completing the above preparations, activate the multiple detection buttons 18 on the detector housing 15 and adjust the sensitivity adjustment knob 19 to set appropriate detection parameters. Simultaneously, the inspector wears headphones 26 and uses the acoustic frequency probe 16 and acoustic vibration probe 17 to inspect the duct joint. The acoustic frequency probe 16 detects the acoustic frequency at the duct joint, and the acoustic vibration probe 17 detects the vibration. The detected signals are transmitted to the detector body 1 via wire 20 for analysis and processing. The inspector can hear the feedback of the detection signals through the headphones 26, thus determining whether there is air leakage at the duct joint. Through the interlocking and coordination of the above-mentioned components, the air leakage detection instrument completes the inspection of the locomotive duct joint.

[0045] It should be noted that the above embodiments are only used to illustrate the present utility model, but the present utility model is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A kind of electric locomotive air pipe joint air leakage detector, it is characterized by: Including detection instrument main part (1), operating lever assembly (2), clamping assembly (3) and observation assembly; The operating lever assembly (2) includes an extension rod (5) and a drive rod (6), the drive rod (6) is slidably installed inside the extension rod (5), a limiting groove (8) is formed through the side wall of the extension rod (5) away from the handheld end, and a limiting connecting component is arranged at the end of the drive rod (6) away from the handheld end. The tail of the clamping assembly (3) is connected with the limiting connecting component, the head of the clamping assembly (3) is used for wrapping and clamping the air pipe joint, the tail of the clamping assembly (3) is driven to slide along the limiting groove (8) by the sliding drive rod (6), so that the head of the clamping assembly (3) is gradually opened or closed during the sliding process, so as to clamp the air pipe joint. The observation assembly is rotatably connected with the outer surface of the front end of the extension rod (5) and is used for observing the detection position. The detection instrument main part (1) is installed on the side of the operating lever assembly (2) and includes a sound wave frequency probe (16) arranged on the top of the detection instrument main part (1) and a sound wave vibration probe (17) arranged on the front end of the extension rod (5).

2. The air leakage detector for the air pipe joint of an electric locomotive according to claim 1, characterized in that: The clamping assembly (3) includes two driven sheets (9) and two clamping heads (10), one end of the driven sheet (9) is rotatably sleeved on the limiting connecting component, the other end and the tail of the clamping head (10) are cross-stacked in a rhombus shape and are connected by a connecting rivet (11), the tail of the clamping head (10) is cross-stacked and penetrates a limiting pin (4), the limiting pin (4) penetrates the extension rod (5) at the same time, and the clamping assembly (3) can rotate around the central axis of the limiting pin (4).

3. The air leakage detector for the air pipe joint of an electric locomotive according to claim 2, characterized in that: The limiting connecting component includes a connecting bolt (12) and two limiting connecting blocks (13), one side of the two limiting connecting blocks (13) is fixed on both sides of the end of the drive rod (6), and the other side is slidably arranged in the limiting groove (8); the connecting bolt (12) is fixed between the two limiting connecting blocks (13), and one end of the driven sheet (9) is rotatably sleeved on the connecting bolt (12); the side surface of the limiting connecting block (13) in the same direction as the detection instrument main part (1) is provided with a wire combing body (14), and the wire combing body (14) is in a circular hole shape.

4. The air leakage detector for the air pipe joint of an electric locomotive according to claim 2, characterized in that: The inner surface of the clamping head (10) is fixed with a flexible shielding sheet (23).

5. The air leakage detector for the air pipe joint of an electric locomotive according to claim 1, characterized in that: The extension rod (5) includes a barrel and a first handle arranged at one end of the rod body, the drive rod (6) includes a rod body and a second handle arranged at one end of the rod body, and the first handle is symmetrically opened along the axis direction of the barrel to form a positioning groove for limiting the movement of the second handle along the axis direction.

6. The air leakage detector for the air pipe joint of an electric locomotive according to claim 1, characterized in that: The end of the limiting groove (8) away from the second handle of the drive rod (6) is provided with a circular placement groove (25), and the front end of the limiting groove (8) is provided with a fixing piece (7) for installing the observation assembly, and the fixing piece (7) is a hollow hemispherical shape.

7. The air leakage detector for a pipe joint of an electric locomotive according to claim 6, characterized in that: The observation assembly includes an observation mirror (21) and a connecting body (22), one end of the connecting body (22) is a spherical structure, the spherical structure is rotatably arranged in the fixing piece (7) at multiple angles, and the other end is fixedly connected with the observation mirror (21).

8. The air leakage detector for the air pipe joint of an electric locomotive according to claim 3, characterized in that: The operation lever assembly (2) is provided with a containing device (24), and the detector main body (1) is detachably installed in the containing device (24).

9. The air leakage detector for a pipe joint of an electric locomotive according to claim 8, characterized in that: The detector main body (1) comprises a detector shell (15), a sound wave frequency probe (16), a sound wave vibration probe (17), a detection button (18) and a sensitivity adjusting knob (19). The sensitivity adjusting knob (19) and the plurality of detection buttons (18) are arranged on the front face of the detector shell (15), the sound wave frequency probe (16) is fixed on the top of the detector shell (15), the sound wave vibration probe (17) is arranged in a placing groove (25) and connected with one side of the detector shell (15) through a wire (20), and the wire (20) passes through the comb wire body (14).

10. The air leakage detector for a pipe joint of an electric locomotive according to claim 9, characterized in that: An earphone (26) is installed on the side of the detector shell (15) away from the sound wave vibration probe (17).

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