Method for using portable height adjustment instrument of railway overhead line system

Abstract

This invention relates to a method of using a portable height adjuster for railway catenary systems. The device includes a hollow outer shell, comprising an adjustment box and a recovery compartment assembly connected together. A first hook assembly is located at the end of the recovery compartment assembly facing away from the adjustment box. A through hole is formed at the end of the adjustment box facing away from the recovery compartment assembly. A rigid telescopic member is arranged along the length direction and extends through the through hole within the outer shell. A second hook assembly is located at the end of the rigid telescopic member extending out of the outer shell. The surface of the outer shell is provided with a laser rangefinder, a rotation mechanism for controlling the reciprocating movement of the rigid telescopic member along the length direction of the outer shell, and a braking mechanism for locking the rigid telescopic member. This invention provides a portable height adjuster with a rigid telescopic member, which has high strength and rigidity to adapt to complex working conditions. Simultaneously, the laser rangefinder allows for accurate measurement of the height of the railway catenary, significantly reducing the number of maintenance personnel and saving time on replacing or adjusting droppers.

Description

Technical Field

[0001] This invention belongs to the technical field of railway catenary measurement equipment, and in particular relates to a method for using a portable railway catenary height adjustment instrument. 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 120 km / 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. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a portable 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 the present invention to solve its technical problem is as follows: a portable height adjustment instrument for railway catenary includes a hollow outer shell, the outer shell including a connected adjustment box and a recovery bin assembly, a first hook assembly is provided at the end of the recovery bin assembly facing away from the adjustment box, a through hole is opened at the end of the adjustment box facing away from the recovery bin assembly, a rigid telescopic member is provided inside the outer shell arranged along the length direction and one end of the rigid telescopic member protruding through the through hole, a second hook assembly is provided at the end of the rigid telescopic member protruding through the outer shell, and a laser rangefinder, a rotation mechanism for controlling the reciprocating movement of the rigid telescopic member along the length direction of the outer shell, and a braking mechanism for locking the rigid telescopic member are provided on the surface of the outer shell.

[0007] Preferably, the rigid telescopic component is a chain assembly. The outer shell contains a chain assembly arranged along the length direction, with one end extending through the through hole serving as a chain hole. The end of the chain assembly extending out of the outer shell is provided with a second hook assembly. The chain assembly includes two single chains. Each single chain includes several “7”-shaped links arranged in an array. Each link includes a longitudinal side arranged along the length direction of the chain assembly and a diagonal side extending obliquely outward from the longitudinal side. Two links parallel in the thickness direction of the same single chain are connected by connecting pins. The two ends of the longitudinal sides of two links adjacent in the length direction are connected by chain plates. The links of two oppositely arranged single chains are arranged in opposite directions and are staggered. A gap is formed between two adjacent diagonal sides in the length direction to lock the diagonal side extending from the opposite single chain. The rotating mechanism includes a gear that engages with the gap between two adjacent connecting pins in the width direction of the chain assembly. The shaft of the gear is provided with a drive shaft extending out of the outer shell. The other end of the drive shaft is connected to a drive handle.

[0008] Preferably, the recycling bin assembly is provided with a guide plate arranged along the length of the recycling bin assembly. The guide plate includes a chain splitting plate located at the central axis of the chain assembly, compartment plates located on both sides of the chain splitting plate, and two guide plates. One end of the chain splitting plate is fixed to the inner wall of the recycling bin assembly away from the adjustment box, and the other end of the chain splitting plate has a rounded corner. One end of the compartment plates is fixed to the inner wall of the recycling bin assembly near the adjustment box, and the other end of the compartment plates has a rounded corner. The distance between the chain splitting plate and the compartment plates and the distance between the compartment plates and the inner wall of the recycling bin assembly are matched with the width of the chain link. The guide plates are located in the adjustment box, with one end connected to the root of the two compartment plates, and the distance at the other end gradually decreasing until it matches the width of the chain assembly.

[0009] Preferably, the outer shell surface has a braking guide groove, which is arranged perpendicular to the length direction of the chain assembly. One side of the braking guide groove has an outwardly extending limiting groove. The braking mechanism includes a braking block that is fitted with the gap between two adjacent connecting pins in the thickness direction of the chain assembly. The surface of the braking block is provided with a braking rod that can slide along the braking guide groove. The end of the braking block away from the chain assembly is connected to the inner wall of the outer shell through a return spring.

[0010] Preferably, the rigid telescopic member is a rack assembly, and the housing is provided with a rack assembly arranged along the length direction and one end of which passes through the through hole that serves as a rack hole. The end of the rack assembly that passes through the housing is provided with a second hook assembly. The rotating mechanism includes a gear that meshes with the rack assembly. The shaft of the gear is provided with a drive shaft that passes through the housing. The other end of the drive shaft is connected to a drive handle.

[0011] 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.

[0012] 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.

[0013] 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 rigid telescopic member by connecting bolts.

[0014] Preferably, the hooks of the first hook assembly and the second hook assembly are single hooks or double hooks.

[0015] Preferably, the outer casing surface is provided with a vertical detection device.

[0016] The beneficial effects are: (1) The 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 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 rigid telescopic part connects the upper hook point and the lower hook point to the outer shell 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

[0017] Figure 1 This is a front view of an embodiment of a portable railway catenary height adjustment device. Figure 2 Left view of an embodiment of a portable railway overhead contact line height adjustment device; Figure 3 This is a cross-sectional view of an embodiment of a portable height adjustment device for railway overhead contact lines; Figure 4 yes Figure 1 Cross-sectional view at point AA; Figure 5 yes Figure 3 Enlarged view of the middle adjustment box; Figure 6 This is a front view of a second embodiment of a portable height adjustment device hook assembly for railway overhead contact lines. Figure 7 This is a schematic diagram illustrating the usage of a portable railway overhead contact line height adjuster. Figure 8 This is a schematic diagram illustrating the second method of using a portable railway overhead contact line height adjuster. Figure 9 This is a front view of a third embodiment of a portable railway catenary height adjustment device. Figure 10 Left view of embodiment three of a portable railway catenary height adjustment device; Figure 11 This is a cross-sectional view of a third embodiment of a portable height adjustment device for railway overhead contact lines; Figure 12 yes Figure 9 Enlarged view of section ii in the middle; Figure 13 yes Figure 10 Enlarged view of the middle part of the jj; Figure 14 yes Figure 11 Enlarged view at kk; Figure 15 yes Figure 14 Enlarged view of the middle link; Figure 16 yes Figure 14 Enlarged view of the middle link plate; 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; 1. Rotating mechanism; 2. Rack and pinion assembly; 3. Hook assembly; 4. Recycling bin assembly; 5. Laser rangefinder; 6. Bubble-type universal level; 7. Chain assembly 11. Adjustment box; 12. Braking mechanism; 13. Rotation mechanism; 111. Rack hole, 112. Trigger hole, 113. Extension fixing plate, 114. Fixing screw hole, 115. Fixing bolt; 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; 131. Gear; 132. Drive shaft; 133. Drive handle; 21. Rack, 22. Tooth, 23. Guide groove, 24. Fixed slider; 31. Hook; 32. Connecting plate; 33. Connecting screw hole; 34. Connecting bolt; 611. Chain hole; 612. Brake guide groove; 613. Limiting groove; 614. Guide plate; 621. Chain, 622. End plate, 623. Link, 624. Plate, 625. Pin hole, 626. Connecting pin; 631. Brake lever; 41. Recycling bin, 42. Chain conveyor plate, 43. Compartment plate.

[0018] The same markings in each diagram represent the same component. Detailed Implementation

[0019] 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 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 invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0020] Example 1 like Figure 1 , 2As shown in Figure 3, this invention provides a rack-and-pinion type portable height adjuster for railway overhead contact lines, in which the rigid telescopic component is set as a rack. Specifically, this embodiment includes a housing, which includes an adjustment box 11 and a recovery bin assembly 4 connected together. The recovery bin assembly 4 has a first hook assembly 3 at one end facing away from the adjustment box 11. The adjustment box 11 has a rack hole 111 at one end facing away from the recovery bin assembly 4. The housing contains a rack assembly 2 arranged along the length direction and with one end protruding from the rack hole 111. The end of the rack assembly 2 protruding from the housing has a... The second hook assembly 3 has a laser rangefinder 5, a rotation mechanism 131 for controlling the rack assembly 2 to reciprocate along the length of the recycling bin assembly 4, and a braking mechanism 12 for locking the rack assembly 2 on its surface. The rotation mechanism 131 includes a gear 131 located inside the adjustment box 11 and meshing with the rack assembly 2, and a drive handle 133 located 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 through a lever principle.

[0021] 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.

[0022] 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.

[0023] 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 raised, causing the brake block 121 to move away from the rack assembly 2. Maintaining the pressed position, the operator can crank the drive handle 133 to extend or retract the rack assembly 2 along the length of the recovery chamber assembly 4. To ensure the adjustment accuracy of the portable height adjuster, the teeth 22 of the brake block 121 and the rack assembly 2 are fine teeth with a pitch of 1mm.

[0024] 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.

[0025] 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.

[0026] Example 2 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.

[0027] Example 3 like Figure 9 , 10 As shown in Figure 11, the present invention also provides a chain-type portable height adjuster for railway catenary, which also includes a hollow outer shell. The outer shell includes an adjustment box 11 and a recovery bin assembly 4 connected together. The end of the recovery bin assembly 4 facing away from the adjustment box 11 is provided with a first hook assembly 3. The end of the adjustment box 11 facing away from the recovery bin assembly has a through hole serving as a chain hole 611. The outer shell is provided with a chain assembly 7 arranged along the length direction and one end of which passes through the chain hole 611. The end of the chain assembly 7 that passes through the outer shell is provided with a second hook assembly 3. The surface of the outer shell is provided with a laser rangefinder 5, a rotation mechanism 13 for controlling the reciprocating movement of the chain assembly 7 along the length direction of the outer shell, and a braking mechanism 12 for locking the rigid telescopic member.

[0028] In this embodiment, the chain assembly 7 is used as a rigid telescopic member, such as... Figure 13 , 14 In 15 and 16, the outer casing is provided with a chain assembly 7 arranged along the length direction and one end of which passes through the through hole 611, which serves as the chain hole. The end of the chain assembly 7 that passes through the outer casing is provided with a second hook assembly 3. The chain assembly 7 includes two single chains. Each single chain includes a plurality of “7”-shaped links 623 arranged in an array. Each link 623 includes a longitudinal side arranged along the length direction of the chain assembly 7 and an oblique side extending obliquely outward from the longitudinal side. Two links 623 in the same single chain that are parallel in the thickness direction are connected by a connecting pin 626 passing through the pin hole 624 and are adjacent in the length direction. The two longitudinal ends of the two chain links 623 are connected by the chain plate 624. The chain links 623 of the two single chains arranged oppositely are in opposite directions and are staggered. A gap is formed between the two adjacent inclined sides in the length direction to lock the inclined side of the single chain on the opposite side. The rotating mechanism 13 includes a gear 131 that is gapped with the two adjacent connecting pins 626 in the width direction of the chain assembly 7. The shaft of the gear 131 is provided with a drive shaft 132 that passes through the housing. The other end of the drive shaft 132 is connected to the drive handle 133. Rotating the drive handle 133 can make the chain assembly 7 extend and retract inside the housing.

[0029] In a kind of Figure 11In the specific embodiment shown, the recycling bin assembly 4 is provided with a guide plate 42 arranged along the length direction of the recycling bin assembly 4. The guide plate 42 includes a chain splitting plate 42 located at the central axis of the chain assembly 7, a compartmenting plate 43 located on both sides of the chain splitting plate 42, and two guide plates 614. One end of the chain splitting plate 42 is fixed to the inner side wall of the recycling bin assembly 4 away from the adjustment box 11, and the other end of the chain splitting plate 42 has a rounded corner. One end of the compartmenting plate 43 is fixed to the inner side wall of the recycling bin assembly 4 near the adjustment box 11, and the other end of the compartmenting plate 43 has a rounded corner. The distance between the chain splitting plate 42 and the compartmenting plate 43 and the distance between the compartmenting plate 43 and the inner side wall of the recycling bin assembly 4 are matched with the width of the chain link 623. The chain splitting plate 42, the compartmenting plate 43 and the recycling bin assembly 4 form a recycling bin 41 for accommodating the extended chain assembly 7. The guide plate 614 is disposed inside the adjustment box 11, with one end connected to the root of the two compartment plates 43, and the spacing at the other end gradually decreasing until it matches the width of the chain assembly 7. Through the arrangement of the chain plates 42, compartment plates 43, and guide plate 614, the chain assembly 7 of the present invention can be transformed from an externally rigid telescopic component, like a clothing zipper, into a single chain that can flexibly enter the recycling bin 41, thus greatly extending the stroke of the present invention, up to nearly twice the length of the outer shell.

[0030] In a kind of Figure 11 , 12 In the specific embodiment shown, the outer shell surface has a brake guide groove 612, which is arranged perpendicular to the length direction of the chain assembly 7. One side of the brake guide groove 612 is provided with an outwardly extending limiting groove 613. The braking mechanism 12 includes a brake block 121 that is gap-fitted with two adjacent connecting pins 626 in the thickness direction of the chain assembly 7. The surface of the brake block 121 is provided with a brake rod 631 that can slide along the brake guide groove 612. The end of the brake block 121 away from the chain assembly 7 is connected to the inner wall of the outer shell through a return spring 127. When it is necessary to lock the chain assembly 7, the brake lever 631 is moved into the brake guide groove 612. With the elastic force of the return spring 127, the brake lever 631 is pushed out to the end of the brake guide groove 612. At the same time, the brake block 121 can be inserted into the gap between two adjacent connecting pins 626. When it is necessary to unlock the chain assembly 7, the brake lever 631 is pulled back and slid into the limiting groove 613. Then the drive handle 133 can be rotated to extend or retract the chain assembly 7.

[0031] In some other embodiments not shown in the figures of this invention, the rigid telescopic member can be set as a worm gear, and the rotating mechanism can be set as a turbine accordingly. Other specific embodiments of the rigid telescopic member can be designed by those skilled in the art based on common knowledge, and will not be described in detail here.

[0032] Furthermore, to ensure that the laser rangefinder measures the shortest distance, the present invention provides a vertical detection device on the surface of the outer casing. In a... Figure 1 , 9 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 bubble 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 invention is vertical in the length direction.

[0033] like Figure 7 As shown, when the height of the catenary cable b is relatively low and it is possible to make contact without adjusting the height of the lifting platform g, the method of using this invention is as follows: The operator stands on the lifting platform g at its lowest position and holds this invention 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.

[0034] like Figure 8 As shown, another method of using this invention when the height of the catenary cable b is high and the height of the lifting platform g needs to be adjusted is as follows: The operator stands on the raised lifting platform g and first uses the laser rangefinder 5 of this invention to measure the height h1 between the lifting platform g and the plane of the track f; then, the operator holds the first hook assembly of this invention and hooks it onto the contact wire c, and the second hook assembly onto 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.

[0035] Among them: the standard distance from the laser rangefinder 5 on the rack-and-pinion portable height adjuster of the railway contact wire to the hook of the first hook assembly is L, and the height between the lifting platform g and the plane of track f is h1. In order for the contact wire c to meet the standard height H between the plane of track f, 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 of contact wire c and track f is reached based on the distance measured in real time by the laser rangefinder 5.

Claims

1. A method for using a portable height adjustment device for railway overhead contact lines, characterized in that, A portable overhead contact line height adjuster for railways is used. The portable overhead contact line height adjuster includes a hollow outer shell, which comprises an adjustment box and a recovery compartment assembly connected together. A first hook assembly is provided at the end of the recovery compartment assembly facing away from the adjustment box, and a through hole is opened at the end of the adjustment box facing away from the recovery compartment assembly. The outer casing contains a rigid telescopic member arranged along its length and extending through the through hole at one end. A second hook assembly is provided at the end of the rigid telescopic member extending through the outer casing. The surface of the outer shell is equipped with a laser rangefinder, a rotation mechanism for controlling the reciprocating movement of the rigid telescopic member along the length of the outer shell, and a braking mechanism for locking the rigid telescopic member. The method of using the portable height adjustment instrument for railway catenary is as follows: The operator stands on the raised lifting platform and first uses a laser rangefinder to measure the height h1 between the lifting platform and the track plane; then, the first hook assembly is attached to the catenary, and the second hook assembly is attached to the catenary cable; the distance from the catenary to the track plane is determined based on the laser rangefinder reading; after confirming that the design requirements are met, the suspension cable is tightened again. Among them: the standard distance from the laser rangefinder on the portable height adjustment instrument of the railway catenary to the hook of the first hook assembly is L, the height between the lifting platform and the track plane is h1, and the height from the laser rangefinder to the lifting platform is h2=H-h1+L. The standard height H between the catenary and the track plane is determined based on the distance measured in real time by the laser rangefinder.

2. The method of using a portable railway catenary height adjuster according to claim 1, characterized in that, The rigid telescopic component is a chain assembly. The outer shell contains a chain assembly arranged along the length direction, with one end extending through the through hole that serves as a chain hole. The end of the chain assembly extending out of the outer shell is provided with a second hook assembly. The chain assembly includes two single chains, each single chain comprising an array of "7"-shaped links. Each link includes a longitudinal side arranged along the length of the chain assembly and an oblique side extending outward from the longitudinal side. Two links parallel in the thickness direction of the same single chain are connected by connecting pins, and the ends of the longitudinal sides of two links adjacent in the length direction are connected by chain plates. The links of the two oppositely arranged single chains are arranged in opposite directions and are staggered. A gap is formed between two adjacent oblique sides in the length direction to clamp the oblique side extending from the opposite single chain. The rotating mechanism includes a gear that is fitted with two adjacent connecting pins in the width direction of the chain assembly. The gear has a drive shaft that extends out of the housing, and the other end of the drive shaft is connected to a drive handle.

3. The method of using a portable railway catenary height adjuster according to claim 2, characterized in that, The recycling bin assembly is equipped with a guide plate arranged along the length of the recycling bin assembly. The guide plate includes a chain splitting plate located at the central axis of the chain assembly, bin-separating plates located on both sides of the chain splitting plate, and two guide plates. One end of the chain-splitter plate is fixed to the inner wall of the end of the recycling bin assembly away from the adjusting box, and the other end of the chain-splitter plate has a rounded corner. One end of the compartment plate is fixed to the inner side wall of the end of the recycling bin assembly closest to the adjusting box, and the other end of the compartment plate has a rounded corner. The spacing between the chain-splitting plate and the compartment plate, and the spacing between the compartment plate and the inner wall of the recycling bin assembly, are matched with the width of the chain link. The guide plate is located inside the adjustment box, with one end connected to the root of the two compartment plates, and the spacing at the other end gradually decreasing until it matches the width of the chain assembly.

4. The method of using a portable railway catenary height adjuster according to claim 2, characterized in that, The outer casing has brake guide grooves on its surface, which are arranged perpendicular to the length direction of the chain assembly. One side of each brake guide groove has an outwardly extending limiting groove. The braking mechanism includes a brake block that is fitted with the gap between two adjacent connecting pins in the thickness direction of the chain assembly. The surface of the brake block is provided with a brake rod that can slide along the brake guide groove. The end of the brake block away from the chain assembly is connected to the inner wall of the housing through a return spring.

5. The method of using a portable railway catenary height adjuster according to claim 1, characterized in that, The rigid telescopic component is a rack assembly. The housing contains a rack assembly arranged along the length direction, with one end extending through the through hole that serves as a rack hole. The end of the rack assembly extending out of the housing is provided with a second hook assembly. The rotating mechanism includes a gear that meshes with the rack assembly, the gear having a drive shaft extending through the housing at its axis, and the other end of the drive shaft being connected to a drive handle.

6. The method of using a portable railway catenary height adjuster according to claim 5, 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.

7. The method of using a portable railway catenary height adjuster according to claim 6, characterized in that, 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.

8. The method of using a portable railway catenary height adjuster 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 rigid telescopic member by connecting bolts.

9. The method of using a portable railway catenary height adjuster according to claim 1, characterized in that, The hooks of the first hook assembly and the second hook assembly are single hooks or double hooks.

10. The method of using a portable railway catenary height adjuster according to claim 1, characterized in that, The outer shell surface is equipped with a vertical detection device.

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