Railway overhead line system rack type portable height adjustment instrument

Abstract

The utility model relates to a portable height adjusting instrument of rack type of railway contact net, including the shell that is connected by the adjusting box and the recovery bin subassembly, one end of shell is equipped with first pull hook subassembly, the other end is equipped with second pull hook subassembly, be equipped with rack subassembly in the shell, the surface of adjusting box is equipped with laser range finder, is used for controlling the rotation mechanism of rack subassembly reciprocal movement along recovery bin subassembly length direction and is used for the brake mechanism of locking rack subassembly. The utility model is convenient for carrying, easy operation reduces the repeated height detection number that needs to carry out when railway contact net maintenance height adjustment, saves the time of replacement or maintenance adjustment pendant, and rack type height adjusting structure can realize the high accuracy control of railway contact net, guarantees that contact net and pantograph contact well.

Description

Technical Field

[0001] This utility model belongs to the technical field of railway catenary measurement equipment, and in particular relates to a rack-and-pinion portable height adjustment instrument for railway catenary. Background Technology

[0002] In railway electrification systems, the overhead contact line, as the power supply source for electric locomotives, is of paramount importance. A suitable and stable overhead contact line height is a key factor in ensuring good pantograph-catenary contact and achieving efficient and stable current collection. With the continuous increase in railway operating speeds and train density, more stringent requirements are placed on the accuracy and stability of the overhead contact line height. For example, in high-altitude and cold regions, large temperature differences and frequent rain and snow cause soil loosening, making the overhead contact line supports prone to tilting, which in turn leads to changes in the height of the overhead contact line conductors, affecting the power supply to electric locomotives.

[0003] Currently, there are several main methods for adjusting the height of the overhead contact line: One method involves adjusting the contact wire droppers. This method requires the use of a ladder or rail-mounted work vehicle, with a 6C vehicle-mounted or hand-operated laser measuring instrument to determine sections with a height difference > 10mm. Within the designated maintenance window, a static laser measuring instrument is used to verify the precise guide height of each dropper / positioning point. The required millimeters to raise / lower the droppers are calculated based on the design slope (e.g., ≤ 3‰ for 120km / h sections). The dropper clamps or positioning devices are loosened, and a hydraulic tensioner or electric chain hoist is used to raise / lower the line to the target height in one go. After verification, the clamps are locked to complete the height adjustment. This method requires at least 9 people per work group, including operators and support staff. Based on 100 minutes of effective working time, only 150 meters of contact wire height adjustment can be completed. This not only results in high costs associated with deploying large machinery but also extremely low labor efficiency. Other tools include zipper pullers or wire rope tensioners. However, these tools have a wide range of adjustment levels, making them inaccurate to the millimeter, and they can only tighten and raise the rope, not release and lower it, which is extremely inconvenient to use.

[0004] To address the aforementioned issues, existing patent ZL 202221941400.9 discloses a contact wire structure height fine-tuning device. This device uses a hexagonal crank handle inserted into a dial to rotate, causing a grooved wheel to tighten or release the wire rope to adjust the distance. It achieves millimeter-level adjustments and integrates wire release and reeling, replacing hydraulic tensioners or electric chain hoists. It is also compact and portable. However, this existing technology uses a wire rope to connect the railway contact wire to the catenary. The wire rope is relatively soft and easily affected by environmental factors within a long adjustment range, leading to swaying. Besides swaying, misalignment of the upper and lower hook points can cause the contact wire to be out of alignment along its length during testing, further contributing to height deviations. In practical operation, this existing solution still requires several uses of a laser rangefinder to ensure accurate height adjustment, making the operation cumbersome and requiring further improvement. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a portable rack and pinion height adjustment instrument for railway catenary, so as to further improve the convenience and efficiency of railway catenary height adjustment.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: a portable rack and pinion height adjuster for railway catenary includes a shell, the shell including an adjustment box and a recovery bin assembly connected together, a first hook assembly provided at the end of the recovery bin assembly facing away from the adjustment box, a rack hole opened at the end of the adjustment box facing away from the recovery bin assembly, a rack assembly arranged along the length direction with one end protruding from the rack hole inside the shell, a second hook assembly provided at the end of the rack assembly protruding from the shell, a laser rangefinder, a rotation mechanism for controlling the reciprocating movement of the rack assembly along the length direction of the recovery bin assembly, and a braking mechanism for locking the rack assembly are provided on the surface of the adjustment box, the rotation mechanism includes a gear disposed inside the adjustment box and meshing with the rack assembly, and a drive handle disposed outside the adjustment box for driving the gear to rotate, the braking mechanism includes a brake block that engages or disengages with the rack assembly through a lever principle, the laser rangefinder is parallel to the length direction of the shell and the probe is arranged towards the first hook assembly.

[0007] Preferably, the width of the rack assembly matches the width of the inner groove of the recycling bin assembly and the width of the rack hole.

[0008] Preferably, the rack assembly has guide grooves on both sides along the length direction, and the inner side of the housing has a fixed slider that matches the guide grooves.

[0009] Preferably, the first hook assembly includes a first connecting plate with a plurality of connecting screw holes, the first connecting plate being fixed to the end of the housing by connecting bolts; the second hook assembly includes a second connecting plate with a plurality of connecting screw holes, the second connecting plate being fixed to the end of the rack by connecting bolts.

[0010] Preferably, the braking mechanism includes a brake trigger and a brake crank disposed on both sides of the rotating shaft. The rotating shaft is rotatably installed in the shaft hole on the side wall of the adjusting box. The brake trigger and the brake crank form an angle. The brake trigger is disposed outside the adjusting box. The brake crank is disposed inside the adjusting box and is fixedly connected to the brake block by a shaft pin. The brake block has teeth on the side facing the rack assembly that engage with the rack assembly. The brake trigger is connected to the outer wall of the recovery chamber assembly by a return spring. The return spring is used to lift the brake trigger and engage the brake block with the rack assembly.

[0011] Preferably, the surface of the brake block has a limit hole, and the surface of the adjustment box has a corresponding limit hole corresponding to the locking position of the brake block, with a limit pin inserted in the limit hole.

[0012] Preferably, the outer casing surface is provided with a vertical detection device.

[0013] The beneficial effects are: (1) The rack-and-pinion portable height adjuster is lightweight and easy to carry and simple to use; (2) The maintenance of railway contact network requires a lot of manual pulling and measurement work. By suspending the rack-and-pinion portable height adjuster between the contact network and the catenary to adjust the height of the contact network, the number of maintenance personnel can be greatly reduced and the time for replacing or adjusting the suspension wire can be saved; (3) The laser rangefinder can accurately measure the height of the height gauge to the track. The height of the contact network can be confirmed by quick conversion. The vertical detection device controls the verticality to ensure the reliability of the laser rangefinder reading. Finally, the rack-and-pinion portable height adjuster rigidly connects the upper hook point and the lower hook point to avoid shaking and achieve high accuracy of railway contact network height, ensuring good contact between the contact network and the pantograph, and ensuring the safety and stability of the running train; (4) The rack-and-pinion portable height adjuster has a large strength and rigidity and can adapt to complex working conditions. Attached Figure Description

[0014] Figure 1 This is a front view of a portable rack and pinion height adjuster for railway overhead contact lines.

[0015] Figure 2 Left view of a portable rack and pinion height adjuster for railway overhead contact lines;

[0016] Figure 3 This is a cross-sectional view of a portable rack and pinion height adjustment device for railway overhead contact lines.

[0017] Figure 4 yes Figure 1 Cross-sectional view at point AA;

[0018] Figure 5 yes Figure 3 Enlarged view of the middle adjustment box;

[0019] Figure 6 This is a front view of a second embodiment of a rack-and-pinion portable height adjustment device for railway overhead contact lines.

[0020] Figure 7 This is a schematic diagram illustrating the usage of a rack-and-pinion portable height adjuster for railway overhead contact lines.

[0021] Figure 8 This is a schematic diagram illustrating the second method of using a rack-and-pinion portable height adjuster for railway overhead contact lines.

[0022] In the diagram, a. Portable rack and pinion height adjuster for railway overhead contact line, b. Catenary wire, c. Overhead contact line, d. Dropper, e. Track maintenance vehicle, f. Track, g. Lifting platform, L. Distance from laser rangefinder to hook, H. Standard height of overhead contact line, h1. Distance from lifting platform to guide rail, h2. Distance from laser rangefinder to lifting platform;

[0023] 1. Rotating mechanism; 2. Rack and pinion assembly; 3. Hook assembly; 4. Recycling bin assembly; 5. Laser rangefinder; 6. Bubble-type universal level.

[0024] 11. Adjustment box; 12. Braking mechanism; 13. Rotation mechanism;

[0025] 111. Rack hole; 112. Trigger hole; 113. Extension fixing plate; 114. Fixing screw hole; 115. Fixing bolt;

[0026] 121. Brake block, 122. Limiting hole, 123. Limiting pin, 124. Shaft pin, 125. Brake crank, 126. Brake trigger, 127. Return spring, 128. Shaft hole, 129. Rotating shaft;

[0027] 131. Gear; 132. Drive shaft; 133. Drive handle;

[0028] 21. Rack, 22. Tooth, 23. Guide groove, 24. Fixed slider;

[0029] 31. Hook, 32. Connecting plate, 33. Connecting screw hole, 34. Connecting bolt.

[0030] The same markings in each diagram represent the same component. Detailed Implementation

[0031] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0032] like Figure 1 , 2As shown in Figure 3, this utility model provides a portable rack-and-pinion height adjuster for railway overhead contact lines, including a housing. The housing includes a connected adjustment box 11 and a recovery bin assembly 4. A first hook assembly 3 is provided at the end of the recovery bin assembly 4 facing away from the adjustment box 11. A rack hole 111 is opened at the end of the adjustment box 11 facing away from the recovery bin assembly 4. A rack assembly 2 is provided inside the housing, arranged along the length direction and extending through the rack hole 111 at one end. A second hook assembly 3 is provided at the end of the rack assembly 2 extending out of the housing. The surface of the adjustment box 11 is provided with a laser rangefinder 5, a rotation mechanism 131 for controlling the rack assembly 2 to reciprocate along the length direction of the recycling bin assembly 4, and a braking mechanism 12 for locking the rack assembly 2. The rotation mechanism 131 includes a gear 131 disposed inside the adjustment box 11 and meshing with the rack assembly 2, and a drive handle 133 disposed outside the adjustment box 11 to drive the gear 131 to rotate. The braking mechanism 12 includes a brake block 121 that engages or disengages from the rack assembly 2 by lever principle.

[0033] The bottom of the adjustment box 11 is provided with an extension fixing plate 113. The extension fixing plate 113 and the surface of the recycling bin assembly 4 are provided with fixing screw holes 114. The adjustment box 11 is fixedly connected to the recycling bin assembly 4 by fixing bolts 115 passing through the fixing screw holes 114. The laser rangefinder 5 is parallel to the length direction of the outer shell and the probe is arranged in the direction of the first hook assembly 3.

[0034] In a kind of Figure 4 , 5 In the specific embodiment shown, the width of the rack assembly 2 matches the width of the inner groove of the recycling bin assembly 4 and the width of the rack hole. Guide grooves 23 are provided on both sides of the rack assembly 2 along its length, and a fixed slider 24 matching the guide grooves 23 is provided on the inner side of the outer shell. This width matching and the cooperation between the guide grooves 23 and the fixed slider 24 reduce the swaying of the rack assembly 2 within the recycling bin assembly 4 during measurement, ensuring the parallelism of the rack assembly 2 with the recycling bin assembly 4, the adjustment box 11, and the laser rangefinder 5, thereby improving measurement accuracy.

[0035] In a kind of Figure 5In the specific embodiment shown, the surface of the adjustment box 11 has a trigger hole 112. The braking mechanism 12 includes a brake trigger 126 and a brake crank 125 disposed on both sides of the rotating shaft 129. The rotating shaft 129 is rotatably installed in the shaft hole 128 on the side wall of the adjustment box 11. The brake trigger 126 and the brake crank 125 form an angle. The brake trigger 126 passes through the trigger hole 112 and is disposed outside the adjustment box 11. The brake crank 125 is disposed inside the adjustment box 11 and is fixedly connected to the brake block 121 by a shaft pin 124. The brake block 121 has teeth on the side facing the rack assembly 2 that engage with the rack assembly 2. The brake trigger 126 is connected to the outer wall of the recovery chamber assembly 4 by a return spring 127. The return spring 127 is used to push up the brake trigger 126 and engage the brake block 121 with the rack assembly 2. Using the lever principle with the rotating shaft 129 as the fulcrum, when the operator presses the brake trigger 126, the corresponding brake crank 125 is lifted, causing the brake block 121 to move away from the rack assembly 2. By maintaining the pressed state, the operator can crank the drive handle 133 to extend or retract the rack assembly 2 along the length of the recovery bin assembly 4.

[0036] In a kind of Figure 2 , 5 In the specific embodiment shown, the brake block 121 has a limiting hole 122 on its surface, and the adjusting box 11 has a corresponding limiting hole 122 on its surface corresponding to the locking position of the brake block 121. When not testing, the limiting pin 123 can be inserted into the limiting hole 122 to fix the brake block 121 in the locked state, preventing the rack assembly 2 from sliding unexpectedly.

[0037] In a kind of Figure 1 , 2 In the specific embodiment shown in Figure 3, the first hook assembly 3 includes a first connecting plate 32 with three connecting screw holes 33. The first connecting plate 32 is fixed to the end of the outer casing by connecting bolts 34. The initial length of the hook can be adjusted by adjusting which connecting screw hole 33 the connecting bolt 34 is tightened into. The second hook assembly 3 includes a second connecting plate 32 with three connecting screw holes 33. The second connecting plate 32 is fixed to the end of the rack by connecting bolts 34. The initial length of the hook can be adjusted by adjusting which connecting screw hole 33 the connecting bolt 34 is tightened into. In this first embodiment, the hooks 31 of both the first hook assembly 3 and the second hook assembly 3 are single hooks.

[0038] In a kind of Figure 6In the illustrated embodiment 2, the first hook assembly 3 includes a first connecting plate 32 with four connecting screw holes 33, which is fixed to the end of the outer casing by four corresponding connecting bolts 34; the second hook assembly 3 includes a second connecting plate 32 with four connecting screw holes 33, which is fixed to the end of the rack by four corresponding connecting bolts 34. In this embodiment 2, both the hooks 31 of the first hook assembly 3 and the second hook assembly 3 are double hooks.

[0039] The outer casing surface is provided with a vertical detection device. In a kind of Figure 5 In the specific embodiment shown, to save costs, the vertical detection device is a bubble level 6 mounted on the top plane of the outer casing. When the bubble point is located in the center of the universal level, the portable height measuring instrument is considered to be vertical in the length direction. In other embodiments, the vertical detection device may also be a level, two bubble levels respectively mounted on the two sides of the outer casing, or other devices that facilitate confirmation that the present invention is vertical in the length direction.

[0040] like Figure 7 As shown, the method of using this utility model is as follows: When the height of the catenary cable b is low enough that it can be contacted without adjusting the height of the lifting platform g, the operator stands on the lifting platform g at its lowest position and holds this utility model to attach the first hook assembly to the contact wire c and the second hook assembly to the catenary cable b; after pressing the brake wrench, the operator shakes the drive handle 133 to release or retract the rack assembly 2, and determines whether the distance from the contact wire c to the plane of the track f meets the design requirements based on the reading of the laser rangefinder 5; after confirming that the design requirements are met, the suspension cable d is re-locked.

[0041] like Figure 8 As shown, the method of using this utility model is as follows: When the height of the catenary cable b is high and the height of the lifting platform g needs to be adjusted, the operator stands on the raised lifting platform g and first uses the laser rangefinder 5 of this utility model to measure the height h1 between the lifting platform g and the plane of the track f; then, the operator holds this utility model to attach the first hook assembly to the contact wire c and the second hook assembly to the catenary cable b; after pressing the brake wrench, the operator shakes the drive handle 133 to release or retract the rack assembly 2, and determines whether the distance from the contact wire c to the plane of the track f meets the design requirements according to the reading of the laser rangefinder 5; after confirming that the design requirements are met, the suspension cable d is re-locked.

[0042] Among them: the standard distance from the laser rangefinder 5 on the rack-and-pinion portable height adjustment instrument of the railway contact wire c to the hook is L, and the height between the lifting platform g and the plane of track f is h1. In order for the plane between the contact wire c and the plane of track f to meet the standard height H, the height from the laser rangefinder 5 to the lifting platform g needs to be h2 = H - h1 + L. It can be determined whether the standard height H between the plane between the contact wire c and the plane of track f is reached based on the distance measured in real time by the laser rangefinder 5.

Claims

1. A portable rack-and-pinion height adjuster for railway overhead contact lines, comprising a hollow outer shell, characterized in that, The outer casing includes a connected adjustment box and a recycling bin assembly. The recycling bin assembly has a first hook assembly at the end facing away from the adjustment box, and a rack and pinion hole at the end of the adjustment box facing away from the recycling bin assembly. The housing contains a rack assembly arranged along its length, with one end extending through the rack hole. A second hook assembly is provided at the end of the rack assembly extending through the housing. The surface of the adjustment box is equipped with a laser rangefinder, a rotation mechanism for controlling the reciprocating movement of the rack assembly along the length direction of the recycling bin assembly, and a braking mechanism for locking the rack assembly. The rotating mechanism includes a gear disposed inside the adjusting box and meshing with the rack assembly, and a drive handle disposed outside the adjusting box to drive the gear to rotate. The braking mechanism includes a braking block that engages or disengages from the rack assembly via a lever principle. The laser rangefinder is parallel to the length of the outer shell and the probe is positioned towards the first hook assembly.

2. The portable rack and pinion height adjuster for railway overhead contact lines according to claim 1, characterized in that, The width of the rack assembly matches the width of the inner groove of the recycling bin assembly and the width of the rack hole.

3. A portable rack and pinion height adjuster for railway overhead contact lines according to claim 1, characterized in that, The rack assembly has guide grooves on both sides along its length, and the inner side of the housing has a fixed slider that matches the guide grooves.

4. A portable rack and pinion height adjuster for railway overhead contact lines according to claim 1, characterized in that, The first hook assembly includes a first connecting plate with a plurality of connecting screw holes, and the first connecting plate is fixed to the end of the housing by connecting bolts; the second hook assembly includes a second connecting plate with a plurality of connecting screw holes, and the second connecting plate is fixed to the end of the rack by connecting bolts.

5. A portable rack and pinion height adjuster for railway overhead contact lines according to claim 1, characterized in that, The braking mechanism includes a brake trigger and a brake crank located on both sides of a rotating shaft. The rotating shaft is rotatably mounted in a shaft hole in the side wall of the adjusting box. The brake trigger and the brake crank form an angle. The brake trigger is located outside the adjusting box, and the brake crank is located inside the adjusting box and is fixedly connected to the brake block by a shaft pin. The brake block has teeth on the side facing the rack assembly that engage with the rack assembly. The brake trigger is connected to the outer wall of the recovery chamber assembly by a return spring. The return spring is used to lift the brake trigger and engage the brake block with the rack assembly.

6. A portable rack and pinion height adjuster for railway overhead contact lines according to claim 5, characterized in that, The brake block has a limit hole on its surface, and the adjustment box has a corresponding limit hole on its surface corresponding to the locking position of the brake block, with a limit pin inserted in the limit hole.

7. A portable rack and pinion height adjuster for railway overhead contact lines according to claim 1, characterized in that, The outer shell surface is equipped with a vertical detection device.

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