A device for detecting internal defects in subway catenary nodes

Abstract

This utility model belongs to the technical field of rail transit inspection equipment, and discloses a device for detecting internal defects in subway contact network nodes. It includes a controller and an upper fixed frame, with a lower fixed frame rotatably connected to the upper fixed frame. The controller has a display screen and is connected to a connecting cable, which is connected to an ultrasonic testing probe. The ultrasonic testing probe is connected to two coupling fluid holding devices, each connected to a sliding plate. A sliding groove is formed on the inner side of the upper fixed frame, and the sliding plate is slidably connected to the inner wall of the groove. Each coupling fluid holding device has a liquid-holding cavity and several bead holes. The liquid-holding cavity and the bead holes are connected to a delivery pipe, which connects them. A ball bearing is movably connected to the inner wall of each bead hole. The coupling fluid holding device is connected to an inlet, which communicates with the liquid-holding cavity. This solution solves the problems of inconvenient operation at heights and the need for manual application of coupling fluid, and has the advantages of convenient detection, safety, reliability, and high efficiency.

Description

Technical Field

[0001] This utility model relates to the field of rail transit inspection equipment technology, and in particular to a device for detecting internal defects in subway catenary nodes. Background Technology

[0002] The subway overhead contact system is a crucial power supply facility for subway trains, typically erected above or beside the tracks. It transmits power to the train through contact with the pantograph. It mainly consists of contact suspension, support devices, and positioning devices. The contact suspension includes the contact wire and catenary, directly supplying power to the train; the support and positioning devices are used to fix the position of the contact wire, ensuring stable contact with the pantograph. The safe operation of the overhead contact system directly affects the normal operation of the subway and requires regular inspection and maintenance to prevent power supply failures due to component aging or wear, ensuring the safe and reliable operation of trains.

[0003] Subway overhead contact line nodes are subjected to electrical loads, mechanical vibrations, and environmental factors over long periods, making them prone to hidden defects such as cracks, corrosion, and poor contact. These defects can lead to serious faults such as contact line breaks and power outages, directly threatening train operation safety and efficiency. Timely detection of internal defects in these nodes can identify potential hazards in advance, prevent defects from escalating and causing accidents, ensure the stability and reliability of the contact line power supply, and guarantee the continuous, safe, and efficient operation of subway trains.

[0004] The overhead contact line nodes in subway systems are located at high elevations, requiring inspection personnel to use inspection vehicles or ladders to reach the work sites. Due to the high-altitude working environment, inspection personnel not only face challenges such as limited space and operational difficulties, making it hard to accurately control the inspection equipment, but also need to manually apply coupling fluid during the inspection process to ensure accuracy. This cumbersome procedure, especially at height, further increases the difficulty and safety risks, impacting inspection efficiency and potentially leading to falls, equipment damage, and other dangerous situations due to operational errors. This poses a dual threat to the personal safety of inspection personnel and the stable operation of the overhead contact line equipment. Utility Model Content

[0005] The present invention aims to provide a device for detecting internal defects in subway catenary nodes, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A device for detecting internal defects in subway catenary nodes includes a controller and an upper fixed frame. The upper fixed frame is rotatably connected to a lower fixed frame. The controller is equipped with a display screen and connected to a connecting cable. The connecting cable is connected to an ultrasonic testing probe. The ultrasonic testing probe is connected to two coupling fluid holding devices. Each coupling fluid holding device is connected to a sliding plate. The upper fixed frame has a sliding cavity, and the side wall of the sliding cavity has a sliding groove. The sliding plate is slidably connected to the inner wall of the sliding groove.

[0008] The coupling fluid holding device is provided with a liquid holding chamber and several bead holes. The liquid holding chamber and the bead holes are connected to a delivery tube. The liquid holding chamber and the bead holes are connected through the delivery tube. The inner wall of the bead holes is movably connected with ball bearings. The coupling fluid holding device is connected to a liquid inlet, which is connected to the liquid holding chamber.

[0009] Preferably, the infusion tube has a raised portion.

[0010] Preferably, the size of the bead opening is smaller than the diameter of the ball.

[0011] Preferably, the coupling fluid holding device is connected to a pressure-equalizing hole, which communicates with the liquid holding chamber, and the pressure-equalizing hole and the liquid inlet are respectively connected to caps.

[0012] Preferably, the upper fixing frame and the lower fixing frame are each connected to a magnet.

[0013] Preferably, the controller is connected to a fixing clip.

[0014] The beneficial effects of this technical solution compared to existing technologies are as follows:

[0015] (1) This testing device realizes the testing function of subway contact network nodes through the combination of a controller, an upper fixed frame, a lower fixed frame, an ultrasonic testing probe, and a coupling fluid holding device. The upper fixed frame and the lower fixed frame are rotatably connected, which facilitates the quick clamping of the subway contact network node to be tested. The coupling fluid holding device is slidably connected to the upper fixed frame through a sliding plate, which can flexibly adjust the position so that the ultrasonic testing probe can fully contact the contact network node and improve the testing accuracy. At the same time, when the ultrasonic testing probe is moved, the ball bearing of the coupling fluid holding device can carry out the coupling fluid, so that the coupling fluid can be applied to the testing area without the need for manual application by the testing personnel, which reduces the safety risk and improves the testing efficiency.

[0016] (2) The raised part of the infusion tube can effectively change the flow direction of the coupling fluid. When the ultrasonic testing probe comes into contact with the contact network node, it promotes the coupling fluid to flow more smoothly to the testing area, ensures the uniform application of the coupling fluid, enhances the effect of ultrasonic testing, and further improves the accuracy of detecting internal defects in the contact network node. At the same time, when the ultrasonic testing probe is in a stationary state, the coupling fluid can be effectively prevented from flowing out under the combined action of the internal and external atmospheric pressure and the raised part of the infusion tube.

[0017] (3) The bead opening is smaller than the ball diameter, so that the ball can move stably in the bead hole and will not easily fall off. During the test, the ball can effectively control the outflow of coupling fluid, avoid excessive outflow of coupling fluid and waste, and at the same time ensure that the coupling fluid is applied appropriately and evenly to the surface of the contact network node, thus ensuring the accuracy and stability of ultrasonic testing.

[0018] (4) The pressure equalization hole connected to the coupling fluid holding device can balance the air pressure in the holding chamber and ensure that the coupling fluid can flow out smoothly; while the caps connected to the pressure equalization hole and the liquid inlet can effectively prevent the coupling fluid from evaporating, leaking and external impurities from entering the holding chamber when not in use, thus ensuring the quality and cleanliness of the coupling fluid, thereby ensuring the normal progress of the detection work and the reliability of the detection results.

[0019] (5) The magnets connected to the upper and lower fixing frames can quickly and stably attract the detection device to the vicinity of the contact network node by using magnetic force when the detection device is close to the contact network node of the subway. This facilitates the installation and fixing of the detection device, reduces the shaking of the device during the detection process, improves the stability of the detection operation and the accuracy of the detection results, and at the same time reduces the difficulty and workload of manually fixing the device.

[0020] (6) The fixing clip connected to the controller can fix the controller in a suitable position, such as on the clothing of the inspector, so that the inspector can operate the controller stably in different environments and operating postures, avoid the controller from shaking or falling and affecting the inspection work, and improve the convenience of the inspector's operation and the smoothness of the inspection work. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 A three-dimensional structural diagram of the coupling fluid holding device provided by this utility model;

[0023] Figure 3 Longitudinal sectional view of the coupling fluid holding device provided by this utility model;

[0024] Reference numerals: 1. Controller; 2. Upper mounting bracket; 3. Lower mounting bracket; 4. Ultrasonic detection probe; 5. Coupling fluid container; 6. Inlet; 7. Pressure equalization hole; 8. Connecting wire; 9. Sliding cavity; 10. Slide groove; 11. Cap; 12. Liquid holding cavity; 13. Magnet; 14. Sliding plate; 15. Bead hole; 16. Ball bearing; 17. Infusion tube; 18. Raised part; 19. Display screen. Detailed Implementation

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

[0026] like Figures 1 to 3 The device shown is a defect detection device for internal defects in subway catenary nodes, including a controller 1 and an upper fixing frame 2, as shown. Figure 1 As shown, a lower fixed frame 3 is rotatably connected to the lower part of the upper fixed frame 2. The controller 1 is equipped with a display screen 19. A connecting cable 8 is connected to the top of the controller 1. The other end of the connecting cable 8 is connected to an ultrasonic detection probe 4. A coupling fluid holding device 5 is connected to each side of the ultrasonic detection probe 4. A sliding plate 14 is connected to each side of the coupling fluid holding device 5. A sliding cavity 9 is opened in the middle of the upper fixed frame 2. A sliding groove 10 is opened on the side wall of the sliding cavity 9. The sliding plate 14 is slidably connected to the inner wall of the sliding groove 10. The ultrasonic detection probe 4 can slide inside the sliding cavity 9 through the coupling fluid holding devices 5 on both sides.

[0027] After the inspector fixes the controller 1 in a convenient position using the clamp, they rotate the upper fixing frame 2 and the lower fixing frame 3, using the attraction of the magnet 13 to quickly fix the device around the contact wire node. The ultrasonic testing probe 4 is controlled by the controller 1 to slide along the sliding cavity 9 to the testing position. During the movement of the ultrasonic testing probe 4, the coupling fluid holding device 5 slides synchronously and comes into contact with the surface of the contact wire node.

[0028] like Figure 3 As shown, the coupling fluid holding device 5 has a liquid holding chamber 12 at the top and an arc shape at the bottom that matches the contact wire node. The arc-shaped part of the coupling fluid holding device 5 has a bead hole 15. The bead hole 15 and the liquid holding chamber 12 are connected to a delivery pipe 17. The liquid holding chamber 12 and the bead hole 15 are connected through the delivery pipe 17. A ball bearing 16 is movably connected to the inner wall of the bead hole 15. The top of the coupling fluid holding device 5 is connected to an inlet 6, which is connected to the liquid holding chamber 12.

[0029] The coupling fluid pre-injected into the liquid-containing chamber 12 is replenished through the inlet 6, and the pressure equalization hole 7 balances the air pressure inside the chamber to ensure smooth fluid flow. When the arc-shaped part of the coupling fluid holding device 5 contacts the surface of the contact wire node, the ball bearing 16 rolls under the contact pressure. The coupling fluid in the liquid-containing chamber 12 flows to the bead hole 15 through the infusion pipe 17 and is evenly coated on the surface of the contact wire node during the rolling of the ball bearing 16, providing good coupling conditions for ultrasonic testing.

[0030] like Figure 3 As shown, the infusion tube 17 has a raised section 18 in the middle.

[0031] The raised section 18 alters the flow path of the coupling fluid, causing it to flow more concentratedly towards the detection area under the influence of gravity and the inertia of the moving device, thus improving the utilization efficiency and uniformity of the coupling fluid application. Simultaneously, when the ultrasonic probe is stationary, the combined effect of internal and external atmospheric pressure and the raised section of the infusion tube effectively prevents the coupling fluid from flowing out.

[0032] like Figure 3 As shown, the opening size of the bead hole 15 is smaller than the diameter of the ball 16.

[0033] This structure prevents the ball 16 from falling off while controlling the outflow of coupling fluid, ensuring that the fluid is only carried out when the ball 16 comes into contact with the contact mesh surface, thus avoiding waste and ensuring accurate application.

[0034] like Figure 3 As shown, the coupling fluid holding device 5 is connected to a pressure-flattening hole 7, which is connected to the liquid holding chamber 12. The pressure-flattening hole 7 and the liquid inlet 6 are respectively threaded with caps 11.

[0035] Opening cap 11 allows for the addition of coupling fluid or equipment maintenance; closing it prevents liquid leakage and the entry of impurities. The pressure equalization port 7 balances internal and external air pressure during device operation, ensuring the coupling fluid flows out naturally under gravity.

[0036] like Figure 1 As shown, magnets 13 are connected to the upper fixed frame 2 and the lower fixed frame 3 on opposite sides of each other.

[0037] The device can be quickly fixed to the metal structure around the contact wire node by the adsorption of magnet 13, without the need for long-term manual support, thus improving the safety and convenience of high-altitude operations.

[0038] The back of the controller 1 is connected to a fixing clip.

[0039] The fixing clip can fix the controller 1 to the work clothes or testing vehicle of the testing personnel, so that the operator can observe the data feedback of the display screen 19 at any time during the movement, while freeing up their hands to perform other operations.

[0040] The specific implementation process is as follows:

[0041] During the actual testing process, the staff first uses the fixing clip on the back of the controller 1 to fix it to their work clothes or testing vehicle for easy operation. Then, the staff rotates the upper fixing frame 2 and the lower fixing frame 3, and uses the magnet 13 connecting the two to attract the testing device to a suitable position around the subway contact network node, completing the initial fixation of the equipment.

[0042] Next, the staff controlled the ultrasonic testing probe 4 through the controller 1. The ultrasonic testing probe 4 drove the coupling fluid holding devices 5 on both sides to slide along the sliding cavity 9 and the sliding groove 10 of the upper fixed frame 2 until the ultrasonic testing probe 4 moved to the contact network node that needed to be tested. At this time, the lower part of the coupling fluid holding device 5 was in contact with the surface of the contact network node.

[0043] Because the lower part of the coupling fluid holding device 5 is an arc shape that matches the contact network node, during the bonding process, the rolling balls 16 in the bead holes 15 of the arc-shaped part begin to roll under the contact pressure. Under the action of the pressure balancing hole 7, the coupling fluid in the holding chamber 12 flows to the bead holes 15 through the infusion pipe 17 with the raised part 18, and is evenly coated on the surface of the contact network node as the rolling balls 16 roll.

[0044] Finally, the ultrasonic testing probe 4 starts working, emitting ultrasonic waves into the inside of the contact wire node, receiving the reflected signals and transmitting them to the controller 1. The staff observes and analyzes the data through the display screen 19 to determine whether there are any defects inside the contact wire node, thus completing the entire testing process.

[0045] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A subway catenary node internal defect detection device, characterized in that: The device includes a controller (1) and an upper fixed frame (2). The upper fixed frame (2) is rotatably connected to a lower fixed frame (3). The controller (1) is equipped with a display screen (19). The controller (1) is connected to a connecting line (8). The connecting line (8) is connected to an ultrasonic detection probe (4). The ultrasonic detection probe (4) is connected to a coupling fluid holding device (5). There are two coupling fluid holding devices (5). The coupling fluid holding device (5) is connected to a sliding plate (14). The upper fixed frame (2) has a sliding cavity (9). The side wall of the sliding cavity (9) has a sliding groove (10). The sliding plate (14) is slidably connected to the inner wall of the sliding groove (10). The coupling fluid holding device (5) is provided with a liquid holding chamber (12) and a number of bead holes (15). The liquid holding chamber (12) and the bead holes (15) are connected together by an infusion tube (17). The liquid holding chamber (12) and the bead holes (15) are connected through the infusion tube (17). A ball bearing (16) is movably connected to the inner wall of the bead hole (15). The coupling fluid holding device (5) is connected to an inlet (6). The inlet (6) is connected to the liquid holding chamber (12).

2. The device for detecting internal defects of a metro catenary node according to claim 1, characterized in that: The infusion tube (17) is provided with a raised part (18).

3. The device for detecting internal defects of a metro catenary node according to claim 1, characterized in that: The opening size of the bead hole (15) is smaller than the diameter of the ball (16).

4. The device for detecting internal defects of a metro catenary node according to claim 1, characterized in that: The coupling fluid holding device (5) is connected to a pressure-equalizing hole (7), which is connected to the liquid holding chamber (12). The pressure-equalizing hole (7) and the liquid inlet (6) are respectively connected to caps (11).

5. The device for detecting internal defects of a metro catenary node according to claim 1, characterized in that: The upper fixing frame (2) and the lower fixing frame (3) are respectively connected to magnets (13).

6. The device for detecting internal defects of a metro catenary node according to claim 1, characterized in that: The controller (1) is connected to a fixing clip.

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