Device and method for monitoring seamless track steel rail locking variation

Abstract

The invention discloses a device and method for monitoring the locking variation of a seamless track steel rail, and the device comprises two wheel type feeding mechanisms which are respectively installed at the two ends of a long rail table, and first proximity switches are respectively installed at the ends, close to each other, of the two wheel type feeding mechanisms. A plurality of wheel type supporting mechanisms arranged at intervals in the length direction of the long rail table are arranged on the long rail table and located between the two wheel type feeding mechanisms, and carving mechanisms are arranged between the wheel type feeding mechanisms and the wheel type supporting mechanisms close to each other. A plurality of clamping mechanisms and a plurality of active guide rail mechanisms are mounted on the long rail table at intervals in the length direction of the long rail table, and a temperature measuring mechanism is mounted on the long rail table and is close to one engraving mechanism; according to the method, the device is used for monitoring the expansion and contraction amount of the steel rail at the preset temperature and marking. The purpose of monitoring the locking variation of the seamless track steel rail is achieved by monitoring the expansion and contraction amount of the seamless track steel rail. The method is suitable for the technical field of seamless track steel rail monitoring.

Description

Technical Field

[0001] This invention belongs to the technical field of seamless track rail monitoring, specifically, it relates to a device and method for monitoring changes in the locking of seamless track rails. Background Technology

[0002] Monitoring the changes in the locking of seamless track rails (the core issue being the deviation between the actual locking rail temperature and the design / construction locking rail temperature) is crucial for ensuring the safe operation of the track. However, there are still many problems in the current technology and application, mainly in terms of deficiencies in monitoring methods, environmental and on-site interference, lagging data processing and application, and insufficient technology adaptability.

[0003] The displacement monitoring stake method, as the most widely used method, is simple in principle but its accuracy is only at the millimeter level, making it difficult to capture minute creep (e.g., when the seamless track is too long, the spacing between adjacent monitoring stakes increases, and small creep is easily ignored). Furthermore, in special sections such as bridge transition sections and tunnel entrances / exits, monitoring stakes are difficult to install, resulting in monitoring blind spots. Additionally, the accuracy of measuring instruments and rail temperature measurement errors can affect the calculated rail temperature, potentially leading to a deviation of ±4~5℃, which cannot meet the requirements for high-precision monitoring. Traditional gauge measurement methods have an accuracy of approximately ±3℃, but require extremely high standards in process flow, management systems, and the technical skills of measurement personnel. They necessitate pre-setting the gauge length at the rail welding plant and periodically measuring on-site with a calibrated steel ruler, making the operation cumbersome. The strain gauge method relies on resistance strain gauges and Wheatstone bridge circuits, making it susceptible to outdoor environmental influences, with severe zero-point drift and electromagnetic interference, resulting in poor long-term monitoring stability and an inability to guarantee data continuity. Destructive / semi-destructive methods in stress analysis: While rail cutting and drilling offer high accuracy (optimized drilling can reach ±3.8℃), they damage rail integrity. Cutting requires train shutdown, resulting in high testing costs; drilling can induce rail defects and is unsuitable for long-term monitoring. The VERSE rail stress tester (based on the rail lifting method) avoids rail cutting but requires loosening fasteners within a 30m range and applying vertical load, causing some damage to the track and unsuitable for compressed tracks. Measurement accuracy drops sharply on curved tracks with a radius less than 700m. Non-destructive methods in stress analysis: While ultrasonic guided waves and magnetic Barkhausen noise (MBN) do not damage the track, they are highly susceptible to environmental noise and residual rail stress, requiring calibration using zero-stress or numerical analysis models, making the calibration process complex. X-ray methods can only detect stress within tens of micrometers of the rail surface, significantly affected by residual surface stress, limiting their detection range. Summary of the Invention

[0004] This invention provides a device and method for monitoring changes in the locking of seamless railway tracks. By monitoring the expansion and contraction of the seamless railway tracks, the aim of monitoring changes in the locking of seamless railway tracks can be achieved.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A device for monitoring changes in the locking of seamless railway tracks includes two wheeled feeding mechanisms respectively installed at both ends of a long rail platform along its length. A first proximity switch is installed at the end of each wheeled feeding mechanism that is close to the other. Multiple wheeled support mechanisms are spaced apart along the length of the long rail platform between the two wheeled feeding mechanisms. An engraving mechanism is installed between each wheeled feeding mechanism and the close-to-each wheeled support mechanism. Multiple clamping mechanisms and multiple active guide rail mechanisms are spaced apart along the length of the long rail platform. A temperature measuring mechanism is installed on the long rail platform near one of the engraving mechanisms.

[0006] Furthermore, the wheeled feeding mechanism includes two feeding rollers spaced apart along the length of the long rail platform. Each feeding roller is rotatably connected to a first roller seat at both ends of its axial direction. Each first roller seat is detachably mounted on the long rail platform. Driven gears are respectively installed on the same side ends of the two feeding rollers. A drive motor is installed on the long rail platform. A drive gear is coaxially mounted on the output shaft of the drive motor. The drive gear is located between the two driven gears, and the drive gear meshes with the two driven gears.

[0007] Furthermore, the wheel support mechanism includes a support roller, and a second roller seat is rotatably connected to each of the axial ends of the support roller. Each second roller seat is detachably mounted on a long rail platform, and a strain gauge and a data processing unit are mounted on each second roller seat. The strain gauge and the data processing unit are electrically connected.

[0008] Furthermore, the engraving mechanism includes a base mounted on a long rail platform, a position adjustment component mounted on the base, and a laser engraving machine mounted on the position adjustment component, with the engraving end of the laser engraving machine facing the web of the rail.

[0009] Furthermore, the position adjustment assembly includes a first slide rail mounted on a base, a first stepper motor mounted at the end of the first slide rail, a first transmission screw mounted on the output shaft of the first stepper motor, a second slide rail slidably connected to the first slide rail, a second stepper motor mounted at the end of the second slide rail, a second transmission screw mounted on the output shaft of the second stepper motor, a sliding seat mounted on the second slide rail, a laser engraving machine mounted on the sliding seat, the first transmission screw threadedly connected to the second slide rail, the second transmission screw threadedly connected to the sliding seat, the first slide rail extending along the length direction of the long rail platform, and the second slide rail extending along the width direction of the long rail platform.

[0010] Furthermore, the clamping mechanism includes clamping seats and positioning seats spaced apart along the width direction of the long rail platform. The clamping seats are pivotally connected to a fixed seat via a longitudinal axis. The fixed seat is detachably connected to the long rail platform. A first inclined cylinder is hinged between the clamping seats and the long rail platform. The first inclined cylinder is used to drive the clamping seats to rotate along the axis of the longitudinal axis.

[0011] Furthermore, a positioning tongue is pivotally connected to the upper end of the clamping seat, and a curved elastic sheet is provided between the positioning tongue and the clamping seat.

[0012] Furthermore, the active guide rail mechanism includes a mounting base installed on a long rail platform, an inclined slide block slidably connected to the mounting base, a hub motor rotatably connected to the inclined slide block, a second inclined cylinder installed between the mounting base and the inclined slide block, and a second proximity switch installed on the mounting base.

[0013] Furthermore, the temperature measuring mechanism includes an assembly base mounted on a long rail platform, a transverse cylinder mounted on the assembly base, a temperature measuring rod extending from a light shield mounted on the output end of the transverse cylinder, an arc-shaped spring attached to the end of the temperature measuring rod, the arc-shaped spring connected to a copper carrier, a temperature sensor mounted inside the copper carrier, and a cooling pipe mounted on the assembly base, with the light shield at the outlet end of the cooling pipe located away from the transverse cylinder.

[0014] The present invention also discloses a method for monitoring changes in the locking of seamless railway rails using the above-mentioned device, comprising the following steps: Step 1. Control the wheeled feeding mechanism to transport the rails along the length of the long rail platform and capture them with a first proximity switch. The rails are gradually supported by the wheeled support mechanisms. Step 2. When the rail passes through each active guide rail mechanism, the active guide rail mechanism activates and transports the rail. Step 3. When the rail is captured by another second proximity switch, each active guide rail mechanism stops conveying the rail, and at the same time the clamping mechanism clamps the rail. After the rail stops completely, the clamping mechanism located in the middle position maintains the clamping of the rail, and the other clamping mechanisms release the clamping of the rail. Step 4. After that, the temperature measuring mechanism works to measure the temperature at the web of the rail and transmits it to the engraving mechanism. Then, each wheel support mechanism records the vector force it receives. Step 5. Using Hooke's Law ΔL1 = (F × L) / (E × A) The change in length ΔL1 F Rail stress L rail original length E Elastic modulus A Cross-sectional Area Count the changes in rail length between adjacent wheel support structures. The vector sum of the changes in each segment is the length change of the rail due to internal stress. Since there is a temperature difference between the current ambient temperature and the locking rail temperature during track laying, the length change of the rail due to temperature change can be calculated using the formula ΔL2 = а*Δt*L. The theoretical length of the rail at the locking rail temperature can be calculated by adding the sum of the length change of the rail due to internal stress and the length change of the rail due to temperature, plus the actual length of the rail on that side at the current temperature. Step 6. An engraving base layer is attached to the web of the rail. The engraving mechanism is controlled to work. The engraving mechanism first performs centering operation on the engraving part. After centering is completed, the engraving mechanism engraves the marking line on the engraving base layer. Step 7. After the carving is completed, the active guide rail mechanism is activated and drives the steel rail away from the long rail table, so that the steel rail enters the rail welding process for subsequent welding processes.

[0015] The technological advancements achieved by this invention compared to existing technologies, due to the aforementioned structure, are as follows: This invention utilizes an engraving mechanism to engrave a base layer attached to a designated location on the rail, and engraves a set of scale lines of different lengths to mark the theoretical length value of the rail under locked rail temperature conditions. A wheel support mechanism bears the weight of the rail and can measure its internal stress. After the rail is placed and locked onto the long rail platform, the stress borne by the wheel support mechanism is detected, the vector force on the wheel support mechanism is calculated, and transmitted wirelessly to the signal processing unit on the engraving mechanism. A clamping mechanism pushes the rail to the positioning surface and clamps it onto the worktable. During clamping, it provides appropriate support to the middle part of the rail, ensuring that the stress on both sides is relatively uniform, minimizing deformation of the clamping mechanism due to excessive force differences on both sides, which could lead to inaccurate stress measurements of the wheel support mechanisms on both sides. The rail is released before the measurement and engraving work begins. The active guide rail mechanism provides power to the rail when it disengages from the wheel-feeding mechanism. When the rail passes the delivery end and is detected by the wheel-feeding mechanism, the active end of the wheel-feeding mechanism contacts the lower end face of the rail, activating to provide power and causing the rail to move along its length on the long rail platform. After all measurement and marking work is completed, the wheel-feeding mechanism sends the rail away from the marking area. The temperature measuring mechanism measures the rail temperature; it performs temperature measurement after the rail is locked. In summary, this invention achieves the goal of monitoring changes in the locking amount of seamless track rails by monitoring their expansion and contraction. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the wheeled feeding mechanism according to an embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of the wheeled feeding mechanism according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the wheel support mechanism supporting the steel rail according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the wheeled support mechanism according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the clamping mechanism for clamping the rail according to an embodiment of the present invention; Figure 7 This is a side view of the clamping mechanism for clamping the rail according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the clamping mechanism according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the clamping mechanism connecting the telescopic lever and the movable seat in an embodiment of the present invention; Figure 10 This is a schematic diagram of the connection between the active guide rail mechanism and the steel rail according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the active guide rail mechanism according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the corresponding arrangement of the engraving mechanism and the steel rail in an embodiment of the present invention; Figure 13 This is a side view of the structure of the engraving mechanism and the corresponding steel rail in an embodiment of the present invention; Figure 14 This is a schematic diagram of the engraving mechanism described in this invention; Figure 15 This is a schematic diagram of the structure of the temperature measuring mechanism and the corresponding rail in an embodiment of the present invention; Figure 16 This is a side view of the structure of the temperature measuring mechanism and the corresponding rail in an embodiment of the present invention; Figure 17 This is a schematic diagram of the temperature measuring mechanism according to an embodiment of the present invention; Figure 18 This is a schematic diagram of the structure of the carved base layer according to an embodiment of the present invention; Figure 19 This is a schematic diagram of the vector forces between the rail and each wheel support mechanism in an embodiment of the present invention.

[0018] Components labeled: 100-Long rail platform, 200-Wheel feeding mechanism, 201-Feeding roller, 202-First roller seat, 203-Driven gear, 204-Drive motor, 205-Drive gear, 206-Protective housing, 207-Guide plate, 208-First proximity switch, 300-Wheel support mechanism, 301-Support roller, 302-Second roller seat, 303-Data processing unit, 304-Strain gauge, 400-Clamping mechanism, 401-Fixed seat, 402-Clamping seat, 403-Longitudinal shaft, 404-Positioning tongue, 405-First inclined cylinder, 406-Positioning seat, 407-Curved elastic plate, 408-Telescopic lever, 409-Modible seat, 500-Active guide rail mechanism, 501-Mounting seat, 502-Second inclined cylinder 503-Cylinder, 504-Slanted slide block, 505-Hub motor, 506-Second proximity switch, 600-Engraving mechanism, 601-Base base, 602-First slide rail, 603-First stepper motor, 604-First transmission screw, 605-Second slide rail, 606-Second stepper motor, 607-Second transmission screw, 608-Sliding seat, 609-Laser engraving machine, 700-Temperature measuring mechanism, 701-Assembly base, 702-Horizontal cylinder, 703-Light shield, 704-Temperature measuring rod, 705-Arc-shaped spring, 706-Copper carrier, 707-Temperature sensor, 708-Cooling air pipe, 800-Steel rail, 801-Lightfast material layer, 802-First marking scale line, 803-Second marking scale line, 804-Marking symbol. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0020] This invention discloses a device for monitoring changes in the locking of seamless railway rails, such as... Figure 1-19As shown, the system includes a long rail platform 100, a temperature measuring mechanism 700, two wheeled feeding mechanisms 200, two engraving mechanisms 600, multiple wheeled support mechanisms 300, multiple clamping mechanisms 400, and multiple active guide rail mechanisms 500. The two wheeled feeding mechanisms 200 are respectively installed at both ends of the long rail platform 100 along its length, and a first proximity switch 208 is installed at the adjacent ends of each wheeled feeding mechanism 200. The multiple wheeled support mechanisms 300 are all installed on the long rail platform 100 and located between the two wheeled feeding mechanisms 200. These wheeled support mechanisms 300 are spaced apart along the length of the long rail platform 100, and each engraving mechanism 600 is positioned between a wheeled feeding mechanism 200 and an adjacent wheeled support mechanism 300. The aforementioned clamping mechanisms 400 and active guide rail mechanisms 500 are all installed at intervals along the length of the long rail platform 100. The temperature measuring mechanism 700 is installed on the long rail platform 100 and close to one of the engraving mechanisms 600. The working principle and advantages of this invention are as follows: This invention utilizes the engraving mechanism 600 to engrave on the engraving base attached at a specified position on the rail 800, and engraves a set of scale lines of different lengths to mark the theoretical length value of the rail 800 under locked rail temperature conditions. The wheel support mechanism 300 bears the weight of the rail 800 and can measure the internal stress of the rail 800. After the rail 800 is placed and locked on the long rail platform 100, the stress borne by the wheel support mechanism 300 is detected, the vector force borne by the wheel support mechanism 300 is calculated, and transmitted to the signal processing unit on the engraving mechanism 600 via wireless signal. The clamping mechanism 400 is used to push the rail 800 to the positioning surface and clamp the rail 800 on the worktable. During the clamping process, it can provide appropriate support to the middle part of the rail 800 so that the stress on both sides is basically uniform, and minimize the deformation of the clamping mechanism 400 due to excessive stress difference on both sides, which would lead to inaccurate stress measurement of the wheel support mechanism 300 on both sides. The rail 800 is released before the measurement and engraving work begins. The active guide rail mechanism 500 provides power to the rail 800 when it disengages from the wheeled feeding mechanism 200. When the rail 800 passes the delivery end and is detected by the wheeled feeding mechanism 200, the active end of the wheeled feeding mechanism 200 contacts the lower end face of the rail 800, and the wheeled feeding mechanism 200 activates to provide power to the rail 800, causing it to move along its length on the long rail platform 100. After all measurement and marking work is completed, the wheeled feeding mechanism 200 sends the rail 800 away from the marking work area. The temperature measuring mechanism 700 measures the temperature of the rail 800. When the rail 800 is locked, the temperature measuring mechanism 700 measures the temperature of the rail 800. In summary, this invention achieves the goal of monitoring the locking variation of the seamless track rail 800 by monitoring its expansion and contraction.

[0021] As a preferred embodiment of the present invention, such as Figure 2 , 3 As shown, the wheeled feeding mechanism 200 includes a drive motor 204 and two feeding rollers 201. The two feeding rollers 201 are spaced apart along the length of the long rail platform 100. Each feeding roller 201 has a first roller seat 202 rotatably connected to both ends of its axial direction, and each first roller seat 202 is detachably mounted on the long rail platform 100. Driven gears 203 are mounted on the same side of the two feeding rollers 201. The drive motor 204 mounting base 501 is on the long rail platform 100. A drive gear 205 is coaxially mounted on the output shaft of the drive motor 204, positioned between the two driven gears 203, and meshes with the two driven gears 203. Both the drive gear 205 and the two driven gears 203 are installed within a protective housing 206. In this embodiment, the drive motor 204 is controlled to drive the two feeding rollers 201 to rotate synchronously and in the same direction via gear transmission, thereby gradually conveying the rails 800 located on the feeding rollers 201. In this embodiment, two guide plates 207 are provided at the positions between the wheeled feeding mechanism 200 and the long rail platform 100, close to each other. These two guide plates 207 are symmetrically arranged along the width direction of the long rail platform 100, and a guide channel is formed between the two guide plates 207. The diameter of the guide channel gradually narrows from the end of the long rail platform 100 towards its center, thus facilitating the smooth entry of the rails 800 from the inlet end of the guide channel, and then through the guide channel into the wheeled feeding mechanism 200 and being conveyed by the feeding rollers 201.

[0022] As a preferred embodiment of the present invention, such as Figure 4 , 5 As shown, the wheel support mechanism 300 includes a support roller 301, with second roller seats 302 rotatably connected to both ends of the support roller 301 along its axial direction. Each second roller seat 302 is detachably mounted on the long rail platform 100. A strain gauge 304 and a data processing unit 303 are mounted on each second roller seat 302, and the strain gauge 304 is electrically connected to the data processing unit 303. The wheel support mechanism 300 is the assembly that supports the rail 800 and measures the internal stress of the rail 800. When the rail 800 is placed and locked on the long rail platform 100, the waist of the second roller seat 302 deforms due to the weight of the support roller 301 and the friction between the support roller 301 and the bottom surface of the rail 800. The strain gauge 304 reads this data and transmits it to the data processing unit 303. The data processing unit 303 processes the data, calculates the vector force acting on the wheel support mechanism 300, and transmits it wirelessly to the engraving mechanism 600. Note: The vector force here is the sum of the vector forces acting on the two second roller seats 302 in the wheel support mechanism 300.

[0023] As a preferred embodiment of the present invention, such as Figure 12-14 As shown, the engraving mechanism 600 includes a base 601, a position adjustment component, and a laser engraving machine 609. The laser engraving machine 609 is mounted on a vertical drive component (typically a pneumatic or electric cylinder), which is in turn mounted on the position adjustment component. The base 601 is mounted on a long rail table 100, and the position adjustment component is mounted on the base 601. The engraving end of the laser engraving machine 609 faces the web of the rail 800. The vertical drive component drives the laser engraving machine 609 to move, causing it to engrave vertically. Figure 17 As shown, in this embodiment, an engraved base layer is attached to the web of the rail 800. This engraved base layer includes a light-resistant material layer 801 made of multiple layers of polyoxymethylene light-resistant material. A laser engraving machine 609 engraves a first marking scale line 802 in the center of the light-resistant material layer 801. Multiple second marking scale lines 803 are engraved on both sides of the first marking scale line 802. The length of the first marking scale line 802 is greater than the length of the second marking scale lines 803. Marking symbols 804 are engraved below the first marking scale line 802 and each of the second marking scale lines 803. The marking symbols 804 can be at least one of the following: triangle, circle, rectangle, etc. The width of the engraved marking lines is 0.1-0.2 mm to ensure subsequent measurement accuracy. After engraving, paint or coloring is applied to the markings. Measurements are taken using the first marking scale line 802 as the reference. The multiple second marking lines 803 on both sides of the first marking line 802 serve to allow for measurement using the center of any one of the clear second marking lines 803 on either side of the first marking line 802 as a reference when the first marking line 802 is worn and unclear. This increases its service life and measurement accuracy. The marking symbol 804 is an identifier for the grouping of the first marking line 802 and the second marking lines 803.

[0024] As a preferred embodiment of the present invention, such as Figure 12 , 14As shown, the position adjustment assembly includes a first slide rail 602, a first stepper motor 603, a first transmission screw 604, a second slide rail 605, a second stepper motor 606, a second transmission screw 607, and a sliding seat 608. The first slide rail 602 is mounted on a base 601, the first stepper motor 603 is mounted at the end of the first slide rail 602, and the first transmission screw 604 is coaxially mounted on the output shaft of the first stepper motor 603. The second slide rail 605 is slidably connected to the first slide rail 602, the second stepper motor 606 is mounted at the end of the second slide rail 605, the second transmission screw 607 is coaxially mounted on the output shaft of the second stepper motor 606, the sliding seat 608 is mounted on the second slide rail 605, and a laser engraving machine 609 is mounted on the sliding seat 608. In this embodiment, the first transmission screw 604 is threadedly connected to the second slide rail 605, and the second transmission screw 607 is threadedly connected to the sliding seat 608. The first slide rail 602 extends along the length of the long rail platform 100, and the second slide rail 605 extends along the width of the long rail platform 100. This embodiment controls the movement of either the first stepper motor 603 or the second stepper motor 606 to adjust the position of the laser engraving machine 609, thereby enabling engraving at different locations on the substrate. This embodiment also includes a data processor on the laser engraving machine 609, allowing it to perform engraving operations on the substrate based on data provided by the wheel support mechanism 300.

[0025] As a preferred embodiment of the present invention, such as Figure 6-8As shown, the clamping mechanism 400 includes a clamping seat 402, a positioning seat 406, and a first inclined cylinder 405. The clamping seat 402 and the positioning seat 406 are spaced apart along the width direction of the long rail platform 100, forming a clamping opening between them. The clamping seat 402 is pivotally connected to a fixed seat 401 via a longitudinal shaft 403. The fixed seat 401 is detachably connected to the long rail platform 100. One end of the first inclined cylinder 405 is hinged to the long rail platform 100, and the other end is hinged to the clamping seat 402. The first inclined cylinder 405 drives the clamping seat 402 to rotate along the axis of the longitudinal shaft 403. By controlling the action of the first inclined cylinder 405, the clamping seat 402 rotates along the axis of the longitudinal shaft 403, causing the clamping opening to enlarge or shrink, thereby clamping or releasing the rail 800. In this embodiment, a positioning tongue 404 is pivotally connected to the upper end of the clamping seat 402, and a curved elastic plate 407 is provided between the positioning tongue 404 and the clamping seat 402. During the clamping process, the positioning tongue 404, under the action of the curved elastic plate 407, progressively contacts the lower bottom surface of the rail 800, and the positioning tongue 404 floats and supports itself on the lower bottom surface of the rail 800. This provides appropriate support to the middle part of the rail 800, making the stress on both sides of the rail 800 basically uniform, minimizing the deformation of the clamping seat 402 due to excessive force difference on both sides, which would lead to inaccurate stress measurement of the wheel support mechanism 300 on both sides. In order to avoid the positioning seat 406 still contacting the rail 800 and having friction after the clamping mechanism 400 releases the rail 800, affecting the detection of vector force and the subsequent conveying operation of the rail 800, the measures taken in this embodiment are as follows: Figure 9 As shown, a telescopic lever 408 is connected to the clamping seat 402. A movable seat 409 is hinged to one end of the telescopic lever 408 away from the clamping seat 402. The movable seat 409 is slidably connected to the positioning seat 406, and the movable seat 409 moves vertically on the positioning seat 406 under the action of the telescopic lever 408. When the clamping mechanism 400 needs to clamp the rail 800, the first inclined cylinder 405 is controlled to drive the clamping seat 402 toward the rail 800. The clamping seat 402 moves and drives the telescopic lever 408 to move, so that the clamping seat 402 and the movable seat 409 are clamped on both sides of the bottom of the rail 800. When the clamping mechanism 400 needs to release the clamping of the rail 800, the first inclined cylinder 405 is controlled to move in the opposite direction, so that the clamping seat 402 and the movable seat 409 are disengaged from the bottom of the rail 800. At this time, the rail 800 does not contact any part of the long rail platform 100.

[0026] As a preferred embodiment of the present invention, such as Figure 10 , 11As shown, the active guide rail mechanism 500 includes a mounting base 501, an inclined slide 503, a hub motor 504, a second inclined cylinder 502, and a second proximity switch 505. The mounting base 501 is mounted on the long rail platform 100, the inclined slide 503 is slidably connected to the mounting base 501, the hub motor 504 is rotatably connected to the inclined slide 503, the second inclined cylinder 502 is installed between the mounting base 501 and the inclined slide 503, and the second proximity switch 505 is mounted on the mounting base 501. The active guide rail mechanism 500 in this embodiment provides power to the rail 800 when it disengages from the wheel feeding mechanism 200. After the rail 800 passes the wheel feeding mechanism 200 and is captured by the second proximity switch 505, the second inclined cylinder 502 pushes out the inclined slide block 503. The hub motor 504 on the inclined slide block 503 contacts the bottom surface of the rail 800. The hub motor 504 starts at a linear speed equal to that of the feeding roller 201 and provides power to the long rail. After all the measurement marking work is completed, the hub motor 504 sends the rail 800 away from the marking work area.

[0027] As a preferred embodiment of the present invention, such as Figure 15-17 As shown, the temperature measuring mechanism 700 includes a mounting base 701, a transverse cylinder 702, a light shield 703, a temperature measuring rod 704, an arc-shaped spring 705, a copper carrier 706, a temperature sensor 707, and a cooling pipe 708. The mounting base 701 is mounted on the long rail platform 100, the transverse cylinder 702 is mounted on the mounting base 701, the light shield 703 is mounted on the end of the transverse cylinder 702 near the rail 800, and the temperature measuring rod 704 is mounted on the output end of the transverse cylinder 702 and extends out of the light shield 703. In this embodiment, the arc-shaped spring 705 is mounted on the end of the temperature measuring rod 704 and is connected to the copper carrier 706. The temperature sensor 707 is mounted inside the copper carrier 706. The cooling pipe 708 is mounted on the mounting base 701, and the light shield 703 at the outlet end of the cooling pipe 708 is located away from the transverse cylinder 702. The temperature measuring mechanism 700 in this embodiment measures the temperature of the rail 800. After the rail 800 is locked, air is supplied to the transverse cylinder 702 (with a tail buffer) to extend the temperature measuring rod 704 until the surface of the copper carrier 706 adaptively and tightly adheres to the surface of the rail web of the rail 800. The temperature is then measured after standing for 1-2 minutes. After the laser marking on the rail 800 is completed, the transverse cylinder 702 retracts the temperature measuring rod 704, which then retracts into the light shield 703 to prevent temperature changes caused by direct sunlight. The cooling air pipe 708 rapidly cools the temperature measuring rod 704, preparing it for the next measurement. This embodiment utilizes the excellent thermal conductivity of the copper carrier 706 to make the temperature measurement more accurate. The arc-shaped spring 705 ensures that the surface of the copper carrier 706 and the surface of the rail web adaptively adhere to each other.

[0028] The present invention also discloses a method for monitoring changes in the locking of seamless railway rails using the above-mentioned device, comprising the following steps: Step 1. Control the wheeled feeding mechanism 200 to move so that it conveys the rail 800 along the length of the long rail platform 100 and is captured by a first proximity switch 208 that is close to it. The rail 800 is gradually supported by each wheeled support mechanism 300. Step 2. When the rail 800 passes through each active guide rail mechanism 500, the active guide rail mechanism 500 activates and transports the rail 800. Step 3. When the rail 800 is captured by another second proximity switch 505, each active guide rail mechanism 500 stops conveying the rail 800, and at the same time the clamping mechanism 400 clamps the rail 800. After the rail 800 stops completely, the clamping mechanism 400 located in the middle position maintains the clamping of the rail 800, and the other clamping mechanisms 400 release the clamping of the rail 800. Step 4. After that, the temperature measuring mechanism 700 works to measure the temperature at the web of the rail 800 and transmit it to the engraving mechanism 600. Then, each wheel support mechanism 300 records the vector force it receives. Step 5. Using Hooke's Law ΔL1 = (F × L) / (E × A) The change in length ΔL1 F Rail stress L rail original length E Elastic modulus A Cross-sectional Area Count the changes in length of each adjacent wheel support rail 800. The vector sum of the changes in each segment is the length change of rail 800 due to internal stress. Since there is a temperature difference between the current ambient temperature and the locking rail temperature during track laying, the length change of rail 800 due to temperature change can be calculated using the formula ΔL2 = а*Δt*L. The theoretical length of rail 800 at the locking rail temperature can be calculated by adding the sum of the length change of rail 800 due to internal stress and the length change of rail 800 due to temperature, plus the actual length of rail 800 at the current temperature on that side. Figure 19 As shown, the wheel support mechanism at position A is located at the end of rail 800, and the vector force between it and rail 800 is unidirectional, which is F. A The vector force between the wheel support mechanism at position B and the rail 800 is bidirectional, and the sum of the vector forces at this point is F. B The vector force between the wheel support mechanism at position C and the rail 800 is bidirectional, and the sum of the vector forces at this point is F. c Substitute the aforementioned vector forces into the formula for calculation.

[0029] Step 6. An engraving base layer is attached to the web of the rail 800. The engraving mechanism 600 is controlled to work. The engraving mechanism 600 first performs a centering operation on the engraving head of the laser engraving machine 609. After the centering is completed, the engraving mechanism 600 engraves the marking line on the engraving base layer. Because the entire device assembly (the device for monitoring the change in the locking of seamless track rails described in this invention) is also affected by temperature, centering is the key to ensuring that the position of the engraved marking line is not affected by temperature. Step 7. After the engraving is completed, the active guide rail mechanism 500 is activated and drives the steel rail 800 away from the long rail table 100, so that the steel rail 800 enters the rail welding process for subsequent welding processes.

[0030] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A device for monitoring changes in the locking amount of seamless railway rails, characterized in that: It includes two wheeled feeding mechanisms respectively installed at both ends of the long rail platform along its length. A first proximity switch is installed at the end of each wheeled feeding mechanism that is close to each other. Multiple wheeled support mechanisms are arranged on the long rail platform and between the two wheeled feeding mechanisms, spaced apart along the length of the long rail platform. An engraving mechanism is arranged between each wheeled feeding mechanism and the wheeled support mechanisms that are close to each other. Multiple clamping mechanisms and multiple active guide rail mechanisms are installed on the long rail platform at intervals along its length. A temperature measuring mechanism is installed on the long rail platform and near one of the engraving mechanisms.

2. The device for monitoring changes in the locking of seamless railway tracks according to claim 1, characterized in that: The wheeled feeding mechanism includes two feeding rollers spaced apart along the length of the long rail platform. Each feeding roller is rotatably connected to a first roller seat at both ends of its axial direction. Each first roller seat is detachably mounted on the long rail platform. Driven gears are mounted on the same side ends of the two feeding rollers. A drive motor is mounted on the long rail platform. A drive gear is coaxially mounted on the output shaft of the drive motor. The drive gear is located between the two driven gears and meshes with the two driven gears.

3. The device for monitoring changes in the locking amount of seamless railway rails according to claim 1, characterized in that: The wheeled support mechanism includes a support roller, and a second roller seat is rotatably connected to each of the two ends of the support roller. Each second roller seat is detachably mounted on a long rail platform. A strain gauge and a data processing unit are mounted on each second roller seat. The strain gauge and the data processing unit are electrically connected.

4. The device for monitoring changes in the locking amount of seamless railway rails according to claim 1, characterized in that: The engraving mechanism includes a base mounted on a long rail platform, a position adjustment component mounted on the base, and a laser engraving machine mounted on the position adjustment component, with the engraving end of the laser engraving machine facing the web of the rail.

5. The device for monitoring changes in the locking amount of seamless railway rails according to claim 4, characterized in that: The position adjustment assembly includes a first slide rail mounted on a base, a first stepper motor mounted at the end of the first slide rail, a first transmission screw mounted on the output shaft of the first stepper motor, a second slide rail slidably connected to the first slide rail, a second stepper motor mounted at the end of the second slide rail, a second transmission screw mounted on the output shaft of the second stepper motor, a sliding seat mounted on the second slide rail, a laser engraving machine mounted on the sliding seat, the first transmission screw threadedly connected to the second slide rail, the second transmission screw threadedly connected to the sliding seat, the first slide rail extending along the length direction of the long rail platform, and the second slide rail extending along the width direction of the long rail platform.

6. The device for monitoring changes in the locking amount of seamless railway rails according to claim 1, characterized in that: The clamping mechanism includes clamping seats and positioning seats spaced apart along the width direction of the long rail platform. The clamping seats are pivotally connected to a fixed seat via a longitudinal axis. The fixed seat is detachably connected to the long rail platform. A first inclined cylinder is hinged between the clamping seats and the long rail platform. The first inclined cylinder is used to drive the clamping seats to rotate along the axis of the longitudinal axis.

7. The device for monitoring changes in the locking amount of seamless railway rails according to claim 6, characterized in that: A positioning tongue is pivotally connected to the upper end of the clamping seat, and a curved elastic sheet is provided between the positioning tongue and the clamping seat.

8. The device for monitoring changes in the locking of seamless railway tracks according to claim 1, characterized in that: The active guide rail mechanism includes a mounting base installed on a long rail platform, an inclined slide block slidably connected to the mounting base, a hub motor rotatably connected to the inclined slide block, a second inclined cylinder installed between the mounting base and the inclined slide block, and a second proximity switch installed on the mounting base.

9. The device for monitoring changes in the locking amount of seamless railway rails according to claim 1, characterized in that: The temperature measuring mechanism includes an assembly base mounted on a long rail platform, a transverse cylinder mounted on the assembly base, a temperature measuring rod with a light shield extending from the output end of the transverse cylinder, an arc-shaped spring attached to the end of the temperature measuring rod, the arc-shaped spring being connected to a copper carrier, a temperature sensor being installed inside the copper carrier, and a cooling pipe mounted on the assembly base, with the light shield at the outlet end of the cooling pipe located away from the transverse cylinder.

10. A method for monitoring changes in the locking amount of seamless railway rails using any one of claims 1-9, characterized in that, Includes the following steps: Step 1. Control the wheeled feeding mechanism to transport the rails along the length of the long rail platform and capture them with a first proximity switch. The rails are gradually supported by the wheeled support mechanisms. Step 2. When the rail passes through each active guide rail mechanism, the active guide rail mechanism activates and transports the rail. Step 3. When the rail is captured by another second proximity switch, each active guide rail mechanism stops conveying the rail, and at the same time the clamping mechanism clamps the rail. After the rail stops completely, the clamping mechanism located in the middle position maintains the clamping of the rail, and the other clamping mechanisms release the clamping of the rail. Step 4. After that, the temperature measuring mechanism works to measure the temperature at the web of the rail and transmits it to the engraving mechanism. Then, each wheel support mechanism records the vector force it receives. Step 5. Using Hooke's Law ΔL1 = (F × L) / (E × A) The change in length ΔL1 F Rail stress L rail original length E Elastic modulus A Cross-sectional Area Count the changes in rail length between adjacent wheel support structures. The vector sum of the changes in each segment is the length change of the rail due to internal stress. Since there is a temperature difference between the current ambient temperature and the locking rail temperature during track laying, the length change of the rail due to temperature change can be calculated using the formula ΔL2 = а*Δt*L. The theoretical length of the rail at the locking rail temperature can be calculated by adding the sum of the length change of the rail due to internal stress and the length change of the rail due to temperature, plus the actual length of the rail on that side at the current temperature. Step 6. An engraving base layer is attached to the web of the rail. The engraving mechanism is controlled to work. The engraving mechanism first performs centering operation on the engraving part. After centering is completed, the engraving mechanism engraves the marking line on the engraving base layer. Step 7. After the carving is completed, the active guide rail mechanism is activated and drives the steel rail away from the long rail table, so that the steel rail enters the rail welding process for subsequent welding processes.

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