Cold tackle ladder for overhead line system
By combining lidar and cameras, the smoothness of the contact wire is detected, solving the problem that existing technologies cannot effectively detect the smoothness of the contact wire. This enables accurate detection of the contact wire flatness, improving the accuracy of the detection and the stability of the equipment.
Patent Information
- Application Number
- CN202522584083.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-05
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-12-05
AI Technical Summary
Existing detection devices cannot effectively detect the smoothness of the contact wire, which causes impact force when the pantograph comes into contact with the contact wire, leading to pantograph-catenary faults.
The flatness of the contact wire is detected by using a lidar to measure the pull-out value and guide height, combined with a camera to monitor track wear, friction detection of the contact wire by a detection component, recording of frictional force changes by a pressure sensor, and adjusting the detection height by adjusting the component.
It enables precise detection of contact wire flatness, avoids pantograph impact caused by uneven contact wire, and improves detection accuracy and equipment stability.
Smart Images
Figure CN223781394U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of railway construction technology, and in particular to a cold sliding ladder for overhead contact lines. Background Technology
[0002] The contact wire in railway construction is a key component of electrified railways and plays a vital role. The main function of the contact wire is to provide continuous and stable electrical energy to electric locomotives or EMUs. When the train is running, the pantograph on top of the train makes close contact with the contact wire and slides to transmit electrical energy from the contact network to the inside of the train, driving the train to move.
[0003] In railway construction, detection devices are needed to inspect the contact wire. Existing detection devices typically measure the height of the contact wire using laser ranging. However, laser ranging cannot detect the smoothness of the contact wire. If the contact wire has local hard bends, wavy undulations, or continuous defects due to uneven material, the laser can only capture individual points in the defective area and cannot identify the overall shape of the contact wire. This can cause the pantograph to generate impact force due to the unevenness of the contact wire when it passes by, leading to pantograph-catenary faults. Utility Model Content
[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:
[0006] A cold-rolling ladder for overhead contact lines includes a support frame, a ladder frame fixed to the top of the support frame, a camera mounted on one side of the support frame via a column, a lidar mounted on the top of the column, an equipment box and a tool box fixed to the inner wall of the support frame, a support frame fixed to the top of the ladder frame, a detection component mounted on the top of the support frame, two support columns fixed to the top of the support frame, a fixing column fixed between the two support columns, an adjustment component for adjusting the detection height mounted on the top of the fixing column, a mounting plate mounted on the top of the adjustment component, a pressure sensor fixed to the top of the mounting plate, and a pulley mounted on the top of the pressure sensor.
[0007] The detection assembly includes a support rod disposed on the top of the support frame, a fixing frame fixed to the top of the support rod, and a detection plate for friction detection with the contact wire disposed on the top of the fixing frame;
[0008] The adjustment assembly includes a drive motor fixed to the top of the fixed column, and a gear is fixed to the output end of the drive motor. The outer side of the gear is meshed with a toothed plate that drives the mounting plate to rise.
[0009] In a preferred embodiment of the contact wire cold sliding ladder of this utility model, a support platform is installed at each of the four corners of the bracket, a movable wheel is installed inside the support platform, and a track is rolled to the bottom of the movable wheel.
[0010] As a preferred embodiment of the contact wire cold sliding ladder of this utility model, the ladder frame is fixed with fixing plates on both sides, and a support leg is fixed to one side of the fixing plate by bolts.
[0011] In a preferred embodiment of the contact wire cold sliding ladder of this utility model, the inner wall of the support leg is threaded with a threaded rod, and the outer side of the threaded rod is fitted with a corrugated pipe. A wheel is fixed to the top of the threaded rod, and a support block is fixed to the bottom of the threaded rod.
[0012] In a preferred embodiment of the contact wire cold sliding ladder of this utility model, a slider is slidably connected to the inner wall of the support column, a sliding rod is fixed to the top of the slider, and the top of the sliding rod is fixed to the bottom of the support rod. A spring is sleeved on the outer side of the sliding rod, and the spring is fixed between the support column and the support rod.
[0013] In a preferred embodiment of the contact wire cold sliding ladder of this utility model, a protective shell is fixed to the top of the fixed column, a guide plate is fixed to the outer side of the toothed plate, and the outer side of the guide plate is slidably connected to the inner wall of the protective shell.
[0014] As a preferred embodiment of the contact wire cold sliding ladder of this utility model, four sets of mounting seats are fixed on the outer side of the support frame, and lighting lamps are provided at the bottom of the mounting seats.
[0015] In summary, this utility model has the following beneficial effects: by emitting short-pulse laser beams through lidar, the pull-out value and guide height of the contact wire can be measured; the camera can monitor the wear of the track and record the process; by driving the motor to drive the gears and toothed plates, the mounting plate is raised; the pulley pushes the support rod, allowing the detection plate to contact the contact wire; by recording data through frictional changes and pressure sensors, the flatness defects of the contact wire can be reflected; and the height of the detection component can be adjusted, making it convenient to detect contact wires at different heights. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0017] Figure 1 This is a structural diagram of a cold-rolled sliding ladder for overhead contact lines.
[0018] Figure 2 This is a schematic diagram of the support structure in this utility model.
[0019] Figure 3 This is a schematic diagram of the support frame in this utility model.
[0020] Figure 4 This is a schematic diagram of the support structure in this utility model.
[0021] Figure 5 This is a schematic diagram of the structure of the fixed column in this utility model.
[0022] The following are the labeling elements in the diagram: 1. Bracket; 2. Ladder; 3. Camera; 4. LiDAR; 5. Equipment box; 6. Toolbox; 7. Support frame; 8. Detection component; 81. Support rod; 82. Fixing frame; 83. Detection plate; 9. Support column; 10. Fixing column; 11. Adjustment component; 111. Drive motor; 112. Gear; 113. Gear plate; 12. Mounting plate; 13. Pressure sensor; 14. Support platform; 15. Casters; 16. Track; 17. Fixing plate; 18. Support leg; 19. Threaded rod; 20. Rotary wheel; 21. Support block; 22. Slider; 23. Slide rod; 24. Spring; 25. Protective shell; 26. Guide plate; 27. Mounting base; 28. Lighting lamp. Detailed Implementation
[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.
[0026] Example 1:
[0027] Reference Figures 1-5 This is the first embodiment of the present invention. This embodiment provides a cold sliding ladder for contact wires, including a support 1, a ladder frame 2 fixed to the top of the support 1, a camera 3 mounted on one side of the support 1 via a column, a lidar 4 mounted on the top of the column, an equipment box 5 and a tool box 6 fixed to the inner wall of the support 1, a support frame 7 fixed to the top of the ladder frame 2, a detection component 8 provided on the top of the support frame 7, two pillars 9 fixed to the top of the support frame 7, a fixing column 10 fixed between the two pillars 9, an adjustment component 11 for adjusting the detection height provided on the top of the fixing column 10, a mounting plate 12 provided on the top of the adjustment component 11, a pressure sensor 13 fixed to the top of the mounting plate 12, and a pulley mounted on the top of the pressure sensor 13.
[0028] The bracket 1 serves as the basic support structure for the entire cold slide ladder, ensuring the stable operation of the equipment on the track 16. The camera 3 is existing technology and can monitor wear, cracks, and foreign object intrusion on the track 16, while recording the detection process for easy archiving and analysis. The lidar 4 emits a short-pulse laser beam that propagates in a straight line to the target object. The laser beam is reflected after encountering the target, and the reflected light is captured by a photodetector and converted into an electrical signal. This is existing technology and will not be elaborated here. The lidar 4 can measure the pull-out value and guide height of the contact line. The contact line appears as a linear structure in the point cloud, and the normal vector and curvature of the local neighborhood can be calculated through principal component analysis (PCA) to identify linear features.
[0029] Pull-out value calculation:
[0030] The lidar 4 scans the position of the contact line on the horizontal plane and measures the distance of the contact line from the center line of the track 16 in the horizontal direction (formula: pull-out value = horizontal coordinate of the contact line - horizontal coordinate of the center line of the track 16). The lidar 4 scans the area of the track 16 to generate three-dimensional point cloud data. The edge points on both sides of the track 16 are filtered by a preset width threshold of the track 16, and the midpoint coordinates of the edge points on both sides are calculated as the horizontal coordinates of the center line of the track 16.
[0031] Guide height calculation:
[0032] Measure the vertical distance from the contact line to the rail surface (formula: guide height = vertical coordinate of contact line - vertical coordinate of rail surface), perform plane fitting on the point cloud of region 16 of the track (RANSAC algorithm), extract the plane equation of the rail surface, and calculate the vertical distance from the projection point of the contact line to the rail surface as the guide height value.
[0033] Equipment box 5 is used to store electrical equipment, and toolbox 6 is used to store maintenance tools and spare parts, which facilitates equipment maintenance and adjustment during the testing process. The detection component 8 is used to detect the flatness of the contact wire. The adjustment component 11 can move the mounting plate 12 and pressure sensor 13, so that the pulley on the pressure sensor 13 pushes the support rod 81 to move, which can adjust the height of the detection component 8, making it convenient to detect contact wires at different heights.
[0034] The detection assembly 8 includes a support rod 81 disposed on the top of the support frame 7, a fixing frame 82 fixed on the top of the support rod 81, and a detection plate 83 for friction detection with the contact wire disposed on the top of the fixing frame 82.
[0035] The support rod 81 can be raised and lowered by adjusting component 11, so that the detection plate 83 comes into contact with the contact line. The detection plate 83 and the contact line make frictional contact, and the friction between the detection plate 83 and the contact line changes, which causes the pressure value of the pressure sensor 13 to change, thereby reflecting the smoothness, height and offset data of the contact line. The detection plate 83 is made of carbon fiber composite material.
[0036] It should be noted that the pressure sensor 13 converts the physical pressure signal into a measurable electrical signal, which is existing technology and will not be elaborated here. When the cold slide moves along the track 16, the detection plate 83 comes into contact with the contact line, and the contact line applies vertical pressure to the detection plate 83. This pressure is transmitted to the sensitive element of the pressure sensor 13 through the pulley. Wavy bends and hard spots on the surface of the contact line can cause the detection plate 83 to vibrate or fluctuate in pressure. The pressure sensor 13 records the contact force between the pulley and the detection plate 83 and the contact line. If there is a height difference in the contact line, the pulley pressure will change periodically, reflecting flatness defects. The pressure sensor 13 only monitors the vertical pressure of the contact line on the detection plate 83 to calibrate the contact state between the detection plate 83 and the contact line, avoiding friction measurement errors caused by poor contact. The detection plate 83 has an inclined surface, which decomposes the tangential friction force into a normal component and a horizontal component. For example, if the angle of the inclined surface is θ, the normal component... It should be noted that Ff represents the tangential frictional force between the detection plate 83 and the contact line. When the detection plate 83 and the contact line are in frictional contact, due to the relative motion between the two (the cold slide moves along the track 16, causing the detection plate 83 to move, while the contact line is relatively stationary, thus generating a tendency or actual relative motion), a force that resists this relative motion will be generated on the contact surface. This force is the frictional force. In the case of the contact line and the detection plate 83 in contact, we are concerned with the frictional force along the tangential direction of the contact line surface, that is, the tangential frictional force Ff.
[0037] The adjustment assembly 11 includes a drive motor 111 fixed to the top of the fixed column 10. A gear 112 is fixed to the output end of the drive motor 111. A toothed plate 113 is meshed with the outer side of the gear 112 to drive the mounting plate 12 to rise.
[0038] The drive motor 111 drives the gear 112 to rotate, causing the toothed plate 113 to move upward. The toothed plate 113 pushes the mounting plate 12 to rise, causing the pulley to push the support rod 81 to rise, thereby detecting the contact wire.
[0039] Example 2:
[0040] This is the second embodiment of the present invention, which is based on the previous embodiment.
[0041] Specifically, support platforms 14 are installed at each of the four corners of the bracket 1, and casters 15 are installed inside the support platforms 14. The bottom of the casters 15 is connected to a track 16.
[0042] The movable wheel 15 can drive the bracket 1 to move on the track 16, which facilitates subsequent inspection of the contact wire. The movable wheel 15 can also be used to push the equipment forward by manpower or power. The support platform 14 can be used by staff to carry out inspections while on the vehicle, which facilitates subsequent emergency maintenance.
[0043] Specifically, both sides of the ladder frame 2 are fixed with fixing plates 17, and one side of the fixing plate 17 is fixed with a support leg 18 by bolts.
[0044] The support leg 18 provides support when the cold slide is stopped, preventing the cold slide from tipping over and enhancing the stability of the equipment.
[0045] Specifically, the inner wall of the support leg 18 is threaded with a threaded rod 19, and a bellows is sleeved on the outer side of the threaded rod 19. A rotating wheel 20 is fixed to the top of the threaded rod 19, and a support block 21 is fixed to the bottom of the threaded rod 19.
[0046] Rotating the wheel 20 drives the threaded rod 19 to rotate, causing the support block 21 to contact the ground and further support the cold slide ladder, adapting to the needs of different terrains, enhancing the stability of the equipment in a static state, and preventing the equipment from sliding or tipping over.
[0047] Example 3:
[0048] This is the third embodiment of the present invention, which is based on the first two embodiments.
[0049] Specifically, a slider 22 is slidably connected to the inner wall of the support column 9, a slider rod 23 is fixed to the top of the slider 22, and the top of the slider rod 23 is fixed to the bottom of the support rod 81. A spring 24 is sleeved on the outer side of the slider rod 23, and the spring 24 is fixed between the support column 9 and the support rod 81.
[0050] When the support rod 81 rises, it will drive the slide rod 23 and the slider 22 to slide on the inner wall of the support column 9, so that the support rod 81 and the fixed frame 82 can move vertically up and down. At the same time, the support rod 81 will pull the spring 24 to stretch. After the test is completed, the pulley will disengage from the support rod 81. At this time, the spring 24 will reset and pull the support rod 81 to move downward, so that the detection plate 83 will disengage from the contact line. The two ends of the spring 24 are fixed to the support column 9 and the support rod 81 by buckles. The buckles facilitate the disassembly of the spring 24 and can be replaced in time when the spring 24 is fatigued.
[0051] Specifically, a protective shell 25 is fixed to the top of the fixed column 10, and a guide plate 26 is fixed to the outside of the toothed plate 113, with the outside of the guide plate 26 slidably connected to the inner wall of the protective shell 25.
[0052] The protective housing 25 protects the adjustment assembly 11 from external environmental influences such as dust and rain, while providing a sliding guide for the guide plate 26. The movement of the toothed plate 113 will cause the guide plate 26 to slide inside the protective housing 25, allowing the toothed plate 113 to move vertically up and down, thus improving the stability of the toothed plate 113.
[0053] Specifically, four sets of mounting seats 27 are fixed on the outside of the support frame 7, and a lighting lamp 28 is provided at the bottom of the mounting seat 27.
[0054] The lighting 28 can provide illumination at night or in low-light environments, enabling workers to clearly observe the status of the overhead contact line and the operation of the equipment.
[0055] During operation, the contact wire is dynamically detected by moving the wheel 15 at low speed along the track 16. Rotating the wheel 20 drives the threaded rod 19 to rotate, causing the support block 21 to contact the ground, enhancing the stability of the equipment when stationary and preventing tipping or slippage. The lidar 4 emits short-pulse laser beams to scan the spatial coordinates of the contact wire. The pull-out value is calculated by determining the contact wire offset using the horizontal coordinate difference (contact wire horizontal coordinate - track 16 centerline horizontal coordinate). The guide height is calculated by measuring the contact wire height using the vertical coordinate difference (contact wire vertical coordinate - track surface vertical coordinate). The camera 3 simultaneously monitors the wear, cracks, and foreign objects on the track 16, and records the detection process for subsequent analysis. The drive motor 111 drives the gear 112 to rotate, which drives the gear plate 113 and the mounting plate 12 to rise, causing the pulley to push the support rod 81 to rise. The detection plate 83 comes into frictional contact with the contact line. Surface wavy bends or hard spots cause vibration or pressure fluctuations. The pressure sensor 13 converts the physical pressure into an electrical signal, records the periodic changes in pressure, and reflects the flatness defects of the contact line. After the detection is completed, the spring 24 pulls the support rod 81 to reset, so that the detection plate 83 is separated from the contact line.
[0056] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A cold-rolled sliding ladder for overhead contact lines, comprising a support frame (1), characterized in that: A ladder (2) is fixed to the top of the bracket (1). A camera (3) is installed on one side of the bracket (1) via a column. A laser radar (4) is installed on the top of the column. An equipment box (5) and a toolbox (6) are fixed to the inner wall of the bracket (1). A support frame (7) is fixed to the top of the ladder (2). A detection component (8) is provided on the top of the support frame (7). Two pillars (9) are fixed to the top of the support frame (7). A fixing column (10) is fixed between the two pillars (9). An adjustment component (11) for adjusting the detection height is provided on the top of the fixing column (10). A mounting plate (12) is provided on the top of the adjustment component (11). A pressure sensor (13) is fixed to the top of the mounting plate (12), and a pulley is installed on the top of the pressure sensor (13). The detection assembly (8) includes a support rod (81) disposed on the top of the support frame (7), a fixing frame (82) fixed on the top of the support rod (81), and a detection plate (83) for friction detection with the contact wire disposed on the top of the fixing frame (82). The adjustment assembly (11) includes a drive motor (111) fixed to the top of the fixed column (10). The output end of the drive motor (111) is fixed with a gear (112). The outer side of the gear (112) is meshed with a toothed plate (113) that drives the mounting plate (12) to rise.
2. The cold-rolled sliding ladder for overhead contact lines as described in claim 1, characterized in that: The bracket (1) has a support platform (14) installed at each of its four corners. The support platform (14) has a moving wheel (15) installed inside. The bottom of the moving wheel (15) is connected to a track (16).
3. The cold-rolled sliding ladder for overhead contact lines as described in claim 1, characterized in that: The ladder frame (2) is fixed with a fixing plate (17) on both sides, and a support leg (18) is fixed to one side of the fixing plate (17) by bolts.
4. The cold-rolled sliding ladder for overhead contact lines as described in claim 3, characterized in that: The inner wall of the support leg (18) is threaded with a threaded rod (19), and a corrugated tube is sleeved on the outer side of the threaded rod (19). A rotating wheel (20) is fixed at the top of the threaded rod (19), and a support block (21) is fixed at the bottom of the threaded rod (19).
5. The cold-rolled sliding ladder for overhead contact lines as described in claim 1, characterized in that: The inner wall of the support column (9) is slidably connected to a slider (22), and a sliding rod (23) is fixed to the top of the slider (22). The top of the sliding rod (23) is fixed to the bottom of the support rod (81). A spring (24) is sleeved on the outside of the sliding rod (23), and the spring (24) is fixed between the support column (9) and the support rod (81).
6. The cold-rolled sliding ladder for overhead contact lines as described in claim 1, characterized in that: The top of the fixed column (10) is fixed with a protective shell (25), and the outer side of the toothed plate (113) is fixed with a guide plate (26), and the outer side of the guide plate (26) is slidably connected to the inner wall of the protective shell (25).
7. The cold-rolled sliding ladder for overhead contact lines as described in claim 1, characterized in that: Four sets of mounting seats (27) are fixed on the outside of the support frame (7), and a lighting lamp (28) is provided at the bottom of the mounting seat (27).