Rail positioning and marking device

Abstract

The present invention provides a rail positioning and marking device. The rail positioning and marking device includes: two positioning structures, one of the two positioning structures is constructed to be installed on a bolt of a fastener on one side of the rail, and the other of the two positioning structures is constructed to be installed on a bolt of a fastener on the other side of the rail. The rail is installed on the sleeper through the two bolts, and on a projection surface parallel to the upper surface of the sleeper, the line passing through the center points of the two bolts is a first straight line; a connecting component, the connecting component includes a marking groove, the marking groove includes a first side and a second side located at both ends of the marking groove in the length extension direction, and the line passing through the centers of the first side and the second side is projected as a second straight line on the projection surface, and the second straight line is collinear with the first straight line. The rail positioning and marking device of the technical solution of the present invention can solve the problem of low measurement efficiency and large measurement error caused by visual marking of the measurement section.

Description

Technical Field

[0001] The present invention relates to the field of railway engineering, and in particular to a rail positioning and marking device. Background Art

[0002] During the operation of a seamless line, long rails can be stretched due to the interaction between the wheel and rail, or unevenly creeping due to improper maintenance work. This can cause the actual locking rail temperature of the seamless line in operation to be different from the designed locking rail temperature. The actual locking rail temperature directly affects the stability of the line and the safety of line operation, so it is necessary to measure the locking rail temperature of the rails frequently. Commonly used locking rail temperature measurement devices require the clamping point of the rail fastener as the measurement section to accurately measure the length of the rails between different sections. The accuracy of the rail length is crucial to the locking rail temperature measurement results. Currently, the measurement section is marked and positioned by visual inspection, which is inefficient and has large measurement errors. Summary of the Invention

[0003] The main purpose of the present invention is to provide a rail positioning and marking device that can solve the problem of low measurement efficiency and large measurement error caused by marking the measuring section by visual inspection.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a rail positioning and marking device is provided, comprising: two positioning structures, one of the two positioning structures is constructed to be installed on a bolt of a fastener on one side of the rail, and the other of the two positioning structures is constructed to be installed on a bolt of a fastener on the other side of the rail, the rail is mounted on the sleeper by the two bolts, and on a projection plane parallel to the upper surface of the sleeper, a line passing through the center points of the two bolts is a first straight line; a connecting assembly, the connecting assembly includes a marking groove, the two positioning structures can position the connecting assembly in a first direction, the length extension direction of the marking groove is perpendicular to the length extension direction of the rail, the marking groove includes a first side and a second side located at both ends of the marking groove in the length extension direction, the line passing through the centers of the first side and the second side is projected as a second straight line on the projection plane, and the second straight line is collinear with the first straight line.

[0005] Furthermore, the positioning structure includes a positioning block and a positioning column connected to the positioning block. A positioning hole is provided on the bottom surface of the positioning block, the positioning column is arranged on the top surface of the positioning block, the bolt head of the bolt is installed in the positioning hole, and the central axis of the positioning column is collinear with the central axis of the bolt.

[0006] Furthermore, the connecting assembly includes two first connecting members and one second connecting member, the second connecting member is sleeved on the rail, a first connecting member is provided at both ends of the second connecting member, and one end of the first connecting member is connected to the second connecting member, and the other end of the first connecting member is connected to the bolt through a positioning structure.

[0007] Furthermore, the second connecting member includes a first rod segment, a second rod segment and a third rod segment, the first rod segment, the second rod segment and the third rod segment are connected in sequence, the second rod segment is bent relative to the first rod segment, the third rod segment is bent relative to the second rod segment, the marking groove is set on the second rod segment, one of the two first connecting members is slidably set on the first rod segment, and the other of the two first connecting members is slidably set on the third rod segment.

[0008] Furthermore, the first connecting member includes a vertical connecting part and a horizontal connecting part, and the end of the horizontal connecting part close to the rail is fixedly connected to the vertical connecting part. A vertical slot is provided on the vertical connecting part, and any one of the first rod segment and the third rod segment can be installed in the vertical slot and can slide along the extension direction of the vertical slot.

[0009] Furthermore, a first guide through hole is provided on the first rod segment and the third rod segment, a first mounting hole connected to the vertical slot in the horizontal direction is provided on the side wall of the vertical connection part, and the connection assembly also includes a first limiting member, which passes through the first mounting hole and the first guide through hole to limit the second connecting member on the first connecting member.

[0010] Furthermore, the first guide through hole has a starting end and an ending end in its extending direction. When the lower surface of the marking groove fits the upper surface of the rail, there is a preset distance between the first limiter and the starting end and the ending end.

[0011] Furthermore, a second guide hole is provided on the horizontal connecting part, the length of the second guide hole is greater than the distance from the central axis of the bolt to the side of the rail head, the positioning column is installed in the second guide hole, and can slide along the guide direction of the second guide hole.

[0012] Furthermore, the connecting assembly also includes a connecting cap and a second limiting member. The connecting cap is provided with a cylindrical hole and a second mounting hole opened on the inner wall surface of the cylindrical hole. The second mounting hole is connected to the cylindrical hole. A radially through third mounting hole is provided on the side wall of the positioning column. The connecting cap is sleeved on the positioning column. The second limiting member passes through the second mounting hole, the cylindrical hole and the third mounting hole to connect the positioning structure to the second connecting member.

[0013] Furthermore, the opening width of the marking groove gradually decreases in a direction approaching the top surface of the rail.

[0014] The technical solution of the present invention is applied, and a plane including a line connecting the center points of the fastener bolts on both sides of the rail and perpendicular to the top surface of the sleeper is used as the central section. By setting two positioning structures, the two positioning structures can position the connecting assembly in a first direction. At this time, on a projection surface parallel to the upper surface of the sleeper, a first straight line projected from the line connecting the center points of the two rail fastener bolts and a second straight line projected from the line connecting the center points of the two side edges of the marking groove are collinear, thereby realizing the requirement of marking the rail with the line connecting the fastener pressure points on both sides of the rail as the section, and being able to accurately and quickly measure the length of the rail, thereby solving the problem of low measurement efficiency and large measurement error caused by visual marking of the measurement section. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 A schematic diagram showing the overall structure of a rail positioning and marking device according to an embodiment of the present invention is shown;

[0017] Figure 2 A schematic diagram showing a rail positioning and marking device according to an embodiment of the present invention installed on a rail;

[0018] Figure 3 A schematic diagram showing the overall structure of the positioning structure of an embodiment of the present invention is shown;

[0019] Figure 4 shows a schematic diagram of the overall structure of the second connecting member of an embodiment of the present invention;

[0020] Figure 5 A schematic diagram showing the overall structure of a first connecting member according to an embodiment of the present invention; and

[0021] Figure 6 The figure shows the overall structure of the connecting cap according to the embodiment of the present invention.

[0022] The above drawings include the following reference numerals:

[0023] 10. Positioning structure; 11. Positioning hole; 12. Positioning column; 13. First connecting member; 14. Second connecting member; 15. First rod segment; 16. Second rod segment; 17. Third rod segment; 18. Vertical connecting part; 19. Horizontal connecting part; 20. Rail; 21. Vertical slot; 22. First guide through hole; 23. First mounting hole; 24. First limiting member; 25. Second guide through hole; 26. Connecting cap; 27. Second limiting member; 28. Cylindrical hole; 29. ​​Second mounting hole; 30. Sleeper; 31. Third mounting hole; 40. Bolt; 50. Marking groove; 51. First side; 52. Second side; 60. Fastener. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] See also Figure 1 and Figure 2 As shown, the present invention provides a rail positioning and marking device, comprising: two positioning structures 10, one of the two positioning structures 10 is mounted on the bolt 40 of the fastener 60 on one side of the rail 20, and the other of the two positioning structures 10 is mounted on the bolt 40 of the fastener 60 on the other side of the rail 20, the rail 20 is mounted on the sleeper 30 through the two bolts 40, and on a projection plane parallel to the upper surface of the sleeper 30, a line passing through the center points of the two bolts 40 is a first straight line; a connecting component, the connecting component includes a marking groove 50, the two positioning structures 10 can position the connecting component in a first direction, the length extension direction of the marking groove 50 is perpendicular to the length extension direction of the rail 20, the marking groove 50 includes a first side 51 and a second side 52 located at both ends of the marking groove 50 in the length extension direction, the line passing through the centers of the first side 51 and the second side 52 is projected as a second straight line on the projection plane, and the second straight line is collinear with the first straight line.

[0026] In this embodiment, the plane including the center point connection line of the fastener bolts 40 on both sides of the rail and perpendicular to the top surface of the sleeper 30 is the central section, and the two positioning structures 10 can position the connecting assembly in the first direction, which is the extension direction of the rail 20, so that the marking groove 50 is located above the rail 20. At this time, on the projection surface parallel to the upper surface of the sleeper 30, the first straight line projected by the connection line of the center points of the two rail fastener bolts and the second straight line projected by the connection line of the center points of the two side edges of the marking groove are collinear, realizing the requirement of marking the rail 20 with the connection line of the fastener pressing points on both sides of the rail as the section, and can accurately and quickly measure the length of each section of the rail 20, solving the problem of low measurement efficiency and large measurement error due to the visual marking of the measurement section.

[0027] In this embodiment, the center line of the bolts 40 on the sleeper 30 is used as a reference to mark the rail 20 on the sleeper 30. The marking can be used to accurately measure the length of the rail between the two rail buckling points to be measured, thereby quickly and accurately determining the position of the rail 20 where the rail temperature needs to be measured, and then determining the position of the locked rail temperature measuring device. The measurement efficiency is high and the accuracy is high, which effectively ensures the accuracy and reliability of the locked rail temperature measurement results.

[0028] In one embodiment, the opening width of the scoring groove 50 gradually decreases as it approaches the top surface of the rail 20 .

[0029] In this embodiment, the opening of the marking groove 50 is wider at the upper end and narrower at the lower end, so that the marking tool can more easily extend into the interior of the marking groove 50, making it convenient for the staff to mark on the rail 20. The opening near the top surface of the rail is the smallest, and the marked line is thinner, which can make the measurement result more accurate.

[0030] See also Figures 1 to 3 As shown, in one embodiment of the present invention, the positioning structure 10 includes a positioning block and a positioning column 12 connected to the positioning block, a positioning hole 11 is provided on the bottom surface of the positioning block, the positioning column 12 is arranged on the top surface of the positioning block, the bolt head of the bolt 40 is installed in the positioning hole 11, and the central axis of the positioning column 12 is collinear with the central axis of the bolt 40.

[0031] Through the above-mentioned arrangement, the positioning structure 10 can be positioned by using the bolt 40, and the installation position of the bolt 40 can be used to realize positioning of the connecting assembly in the first direction, so that the second straight line can be collinear with the first straight line. In this way, by marking through the position of the marking groove 50, it can be ensured that the plane containing the marking and perpendicular to the top surface of the sleeper 30 is the central section of the line connecting the center points of the fastener bolts 40 on both sides of the rail, thereby realizing the requirement of marking the rail 20 with the central section of the fastener pressing points on both sides of the rail as the cross section, and then accurately and quickly measuring the length of the rail 20.

[0032] In one embodiment, the positioning hole 11 is a multi-segment hole, including at least two hole segments, and each hole segment has a different cross-sectional shape or area.

[0033] In one embodiment, the positioning hole 11 is a two-section hole, wherein the hole section at the bottom has a regular hexagonal cross-section, thereby forming a hexagonal prism hole, and the hole section at the upper end of the hexagonal prism hole is a cylindrical hole, so that it can adapt to different types of fastener bolts, thereby improving the adaptability of the positioning structure 10.

[0034] In one embodiment, the positioning hole 11 is a two-section hole, wherein the cross-sections of the hole section at the bottom and the hole section at the top are both regular hexagons, and the cross-sectional area of ​​the hole section at the bottom is larger than that of the hole section at the top.

[0035] In other embodiments, the cross section of the positioning hole 11 may also be other shapes.

[0036] See also Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the connecting assembly includes two first connecting members 13 and a second connecting member 14, the second connecting member 14 is sleeved on the rail 20, a first connecting member 13 is provided at both ends of the second connecting member 14, and one end of the first connecting member 13 is connected to the second connecting member 14, and the other end of the first connecting member 13 is connected to the bolt 40 through the positioning structure 10.

[0037] In this embodiment, the second connector 14 is sleeved on the rail 20, so that the marking groove 50 can be located on the upper surface of the rail 20, making it convenient for the staff to perform marking operations. The second connector 14 is positioned at a certain position of the rail 20 by the two positioning structures 10, and when the second connector 14 is in this position, the second straight line determined by the first side 51 and the second side 52 can be collinear with the first straight line. Marking at the position of the marking groove 50 can ensure that the plane containing the marking line and perpendicular to the top surface of the sleeper 30 is the central section of the line connecting the center points of the fastener bolts 40 on both sides of the rail, thereby achieving the requirement of marking the rail 20 with the central section of the fastener pressing points on both sides of the rail as the cross section, and then accurately and quickly measuring the length of the rail 20.

[0038] See also Figure 1 and Figure 4 As shown, in one embodiment of the present invention, the second connecting member 14 includes a first rod segment 15, a second rod segment 16 and a third rod segment 17. The first rod segment 15, the second rod segment 16 and the third rod segment 17 are connected in sequence. The second rod segment 16 is bent relative to the first rod segment 15, and the third rod segment 17 is bent relative to the second rod segment 16. The scoring groove 50 is provided on the second rod segment 16. One of the two first connecting members 13 is slidably provided on the first rod segment 15, and the other of the two first connecting members 13 is slidably provided on the third rod segment 17.

[0039] In this embodiment, the first rod segment 15, the second rod segment 16, and the third rod segment 17 are connected in sequence. The second rod segment 16 is bent relative to the first rod segment 15, and the third rod segment 17 is bent relative to the second rod segment 16. The first rod segment 15 and the third rod segment 17 are located at both ends of the second rod segment 16 and are parallel to each other, forming a U-shaped structure. The U-shaped structure can be mounted on the rail 20 to ensure that the marking groove 50 is located directly above the rail 20, facilitating marking. In addition, the two first connecting members 13 can form a sliding connection with the second connecting member 14. In this way, by adjusting the position of the two first connecting members 13 on the second connecting member 14, the distance between the second rod segment 16 and the top surface of the rail 20 can be adjusted, ensuring that it can normally cooperate with rails 20 and bolts 40 of different heights, thereby improving its applicability.

[0040] See also Figure 1 and Figure 5 As shown, in one embodiment of the present invention, the first connecting member 13 includes a vertical connecting portion 18 and a horizontal connecting portion 19, and the end of the horizontal connecting portion 19 close to the rail 20 is fixedly connected to the vertical connecting portion 18, and a vertical slot 21 is provided on the vertical connecting portion 18. Any one of the first rod segment 15 and the third rod segment 17 can be installed in the vertical slot 21 and can slide along the extension direction of the vertical slot 21.

[0041] Through the above-mentioned setting, it can be ensured that the second connecting member 14 has freedom only in the vertical direction. By changing the sliding position of the second connecting member 14 in the vertical slot 21, the second connecting member 14 can be adjusted according to the change of the height from the top surface of the bolt 40 to the top surface of the rail 20, thereby improving the applicability of the rail positioning and marking device.

[0042] In one embodiment of the present invention, the first rod segment 15, the third rod segment 17 and the vertical slot 21 are square column-square hole matched, and in order to ensure positioning accuracy, the first rod segment 15, the third rod segment 17 and the vertical slot 21 should ensure a small matching gap. After the installation is completed, the relative position of the second connecting member 14 and the vertical slot 21 can be well adjusted.

[0043] See also Figure 1 and Figure 2 As shown, in one embodiment of the present invention, a first guide through hole 22 is provided on the first rod segment 15 and the third rod segment 17, and a first mounting hole 23 connected to the vertical slot 21 in the horizontal direction is provided on the side wall of the vertical connecting portion 18. The connecting assembly also includes a first limiting member 24, which passes through the first mounting hole 23 and the first guide through hole 22 to limit the second connecting member 14 on the first connecting member 13.

[0044] In this embodiment, the first limiting member 24 passes through the first mounting hole 23 and the first guide through hole 22, and can limit the second connecting member 14 to a certain position on the first connecting member 13, thereby ensuring the structural stability of the device after the position of the second connecting member 14 and the vertical slot 21 is adjusted.

[0045] In one embodiment of the present invention, the first guide through hole 22 has a starting end and an ending end in its extension direction. When the lower surface of the marking groove 50 is in contact with the upper surface of the rail 20, there is a preset distance between the first limiter 24 and the starting end and the ending end.

[0046] Through the above arrangement, it is possible to ensure that the position of the second connecting member 14 relative to the vertical slot 21 is adjustable to adapt to the change in the height from the top surface of the bolt 40 to the top surface of the rail 20 under different working conditions.

[0047] See also Figure 1 and Figure 5 As shown, in one embodiment of the present invention, a second guide through hole 25 is provided on the horizontal connecting portion 19, the length of the second guide through hole 25 is greater than the distance from the center axis of the bolt 40 to the side of the rail head, and the positioning column 12 is installed in the second guide through hole 25 and can slide along the guide direction of the second guide through hole 25.

[0048] Through the above arrangement, the freedom of the connecting assembly in the horizontal direction can be ensured, and the position of the positioning column 12 in the second guide hole 25 can be adjusted to adapt to the change in the distance from the bolt 40 to the rail 20 under different working conditions.

[0049] In one embodiment of the present invention, positioning post 12 is a cylindrical pin, and second guide hole 25 is an oblong hole. The cylindrical pin has the freedom to slide horizontally and rotate about its axis within second guide hole 25. This freedom of rotation accommodates the tightening angles of different hexagonal heads of bolts 40. To ensure positioning accuracy, a small clearance should be maintained between the cylindrical pin and second guide hole 25. After installation, the relative position of the first connector 13 and the cylindrical pin can be smoothly adjusted.

[0050] See also Figures 1 to 6 As shown, in one embodiment of the present invention, the connecting assembly further includes a connecting cap 26 and a second limiting member 27. The connecting cap 26 is provided with a cylindrical hole 28 and a second mounting hole 29 opened on the inner wall surface of the cylindrical hole 28. The second mounting hole 29 is communicated with the cylindrical hole 28. A radially through third mounting hole 31 is provided on the side wall of the positioning column 12. The connecting cap 26 is sleeved on the positioning column 12. The second limiting member 27 passes through the third mounting hole 31, the cylindrical hole 28 and the second mounting hole 29 to connect the positioning structure 10 to the second connecting member 14.

[0051] In this embodiment, the connecting cap 26 is sleeved on the positioning column 12, and the second limiting member 27 passes through the third mounting hole 31, the cylindrical hole 28 and the second mounting hole 29, and can connect the positioning structure 10 to the second connecting member 14. This ensures that when adjusting the positioning column 12, the first connecting member 13 can always remain in a horizontal state and will not tilt, and the second connecting member 14 can move stably in the vertical slot 21, thereby ensuring the stability of the overall structure.

[0052] In one embodiment of the present invention, the first and second stoppers 24, 27 can be split pins, and split pin connection points are designed between each component. This allows the device to maintain its integrity during movement, eliminating the need for repeated disassembly and assembly when used in different locations, making it convenient to use. Furthermore, since the device can be adjusted both horizontally and vertically after installation, it offers high flexibility and can be used in various locations and working conditions.

[0053] The assembly steps for the rail positioning and marking device are as follows: Slide the second guide hole 25 of the first connector 13 onto the positioning post 12 of the positioning structure 10, insert the connecting cap 26 onto the positioning post 12, and insert the second stopper 27 through the third mounting hole 31, the cylindrical hole 28, and the second mounting hole 29 to connect the positioning structure 10 to the first connector 13. Then, insert the first and third segments 15, 17 of the second connector 14 into the vertical slots 21 of the first connector 13, respectively, and insert the first stopper 24 through the first mounting hole 23 and the first guide hole 22 to retain the second connector 14 on the first connector 13. When using the device for the first time, the components can be installed on-site based on the actual position of the bolt 40 and the rail 20. Alternatively, the components can be connected without geometric constraints at the trackside or in a laboratory, and then the relative positions of the components can be adjusted on-site. During on-site installation, first insert the hexagonal head of the bolt 40 into the positioning hole 11, and then follow the above installation process.

[0054] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0055] 1. By setting two positioning structures, the two positioning structures can position the connecting assembly in a first direction. At this time, on the projection surface parallel to the upper surface of the sleeper, the first straight line projected by the connecting line of the center points of the two rail fastener bolts and the second straight line projected by the connecting line of the center points on both sides of the marking groove are collinear, so that the demand of marking the rail with the connecting line of the fastener pressure points on both sides of the rail as the cross section is realized, and the length of the rail can be measured accurately and quickly, thereby solving the problem of low measurement efficiency and large measurement error caused by visual marking of the measurement section.

[0056] 2. The rail positioning and marking device can be assembled in advance and then placed in the set position as a whole. The positioning structure is used to achieve a quick positioning connection with the bolt. When the position of the rail positioning and marking device needs to be adjusted, the positioning structure can be directly removed from the bolt without disassembling other parts, so that the rail positioning and marking device remains in an integral state, and then the overall displacement is achieved to complete the position adjustment of the rail positioning and marking device without reassembly. Therefore, the assembly and disassembly of the rail positioning and marking device is simpler, the position replacement is simpler, the adjustment is more convenient, and the efficiency is higher.

[0057] 3. The rail positioning and marking device uses the bolts of the fasteners on both sides of the rail as a reference to define the position of the positioning structure, and defines the position of the marking groove through the positioning structure. Then, the marking groove is used to accurately mark the rail, so that the marking line on the rail coincides with the line connecting the center points of the bolts of the fasteners on both sides of the rail. This makes the reference position more reasonable, the positioning accuracy higher, and the marking position more accurate, which is more conducive to quickly and accurately determining the measurement position of the locked rail temperature measuring device.

[0058] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0059] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0060] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A rail positioning and marking device, characterized in that: include: Two positioning structures (10), one of the two positioning structures (10) is configured to be mounted on a bolt (40) of a fastener (60) on one side of a rail (20), and the other of the two positioning structures (10) is configured to be mounted on a bolt (40) of a fastener (60) on the other side of the rail (20), the rail (20) is mounted on a sleeper (30) via the two bolts (40), and on a projection plane parallel to the upper surface of the sleeper (30), a line connecting the center points of the two bolts (40) is a first straight line; A connecting assembly, the connecting assembly comprising a marking groove (50), the two positioning structures (10) being capable of positioning the connecting assembly in a first direction, the length extension direction of the marking groove (50) being perpendicular to the length extension direction of the rail (20), the marking groove (50) comprising a first side edge (51) and a second side edge (52) located at both ends of the marking groove (50) in the length extension direction, a line passing through the center of the first side edge (51) and the second side edge (52) being projected onto the projection surface as a second straight line, the second straight line being collinear with the first straight line; The connecting assembly comprises two first connecting members (13) and a second connecting member (14), wherein the second connecting member (14) is sleeved on the rail (20), a first connecting member (13) is provided at each end of the second connecting member (14), and one end of the first connecting member (13) is connected to the second connecting member (14), and the other end of the first connecting member (13) is connected to the bolt (40) via the positioning structure (10).

2. The rail positioning and marking device according to claim 1, characterized in that: The positioning structure (10) comprises a positioning block and a positioning column (12) connected to the positioning block, a positioning hole (11) is provided on the bottom surface of the positioning block, the positioning column (12) is arranged on the top surface of the positioning block, the bolt head of the bolt (40) is installed in the positioning hole (11), and the central axis of the positioning column (12) is collinear with the central axis of the bolt (40).

3. The rail positioning and marking device according to claim 2, characterized in that: The second connecting member (14) comprises a first rod segment (15), a second rod segment (16) and a third rod segment (17); the first rod segment (15), the second rod segment (16) and the third rod segment (17) are connected in sequence; the second rod segment (16) is bent relative to the first rod segment (15); the third rod segment (17) is bent relative to the second rod segment (16); the scoring groove (50) is provided on the second rod segment (16); one of the two first connecting members (13) is slidably provided on the first rod segment (15); and the other of the two first connecting members (13) is slidably provided on the third rod segment (17).

4. The rail positioning and marking device according to claim 3, characterized in that: The first connecting member (13) comprises a vertical connecting portion (18) and a horizontal connecting portion (19), wherein the horizontal connecting portion (19) is fixedly connected to the vertical connecting portion (18), and a vertical slot (21) is provided on the vertical connecting portion (18), wherein any one of the first rod segment (15) and the third rod segment (17) can be installed in the vertical slot (21) and can slide along the extension direction of the vertical slot (21).

5. The rail positioning and marking device according to claim 4, characterized in that: The first rod segment (15) and the third rod segment (17) are both provided with a first guide through hole (22), and a first mounting hole (23) connected to the vertical slot (21) in a horizontal direction is provided on a side wall of the vertical connecting portion (18). The connecting assembly further comprises a first limiting member (24), the first limiting member (24) passing through the first mounting hole (23) and the first guide through hole (22) to limit the second connecting member (14) on the first connecting member (13).

6. The rail positioning and marking device according to claim 5, characterized in that: The first guide through hole (22) has a starting end and an ending end in its extension direction, and when the lower surface of the marking groove (50) is in contact with the upper surface of the rail (20), a preset distance exists between the first limiting member (24) and both the starting end and the ending end.

7. The rail positioning and marking device according to claim 4, characterized in that: A second guide through hole (25) is provided on the horizontal connecting portion (19), the length of the second guide through hole (25) being greater than the distance from the central axis of the bolt (40) to the side of the rail head, and the positioning column (12) is installed in the second guide through hole (25) and can slide along the guide direction of the second guide through hole (25).

8. The rail positioning and marking device according to claim 4, characterized in that: The connecting assembly further comprises a connecting cap (26) and a second limiting member (27), wherein the connecting cap (26) is provided with a cylindrical hole (28) and a second mounting hole (29) provided on the inner wall surface of the cylindrical hole (28), wherein the second mounting hole (29) is communicated with the cylindrical hole (28), and a radially penetrating third mounting hole (31) is provided on the side wall of the positioning column (12), wherein the connecting cap (26) is sleeved on the positioning column (12), and the second limiting member (27) passes through the second mounting hole (29), the cylindrical hole (28) and the third mounting hole (31) to connect the positioning structure (10) to the second connecting member (14).

9. The rail positioning and marking device according to any one of claims 1 to 8, characterized in that: The opening width of the marking groove (50) gradually decreases in a direction approaching the top surface of the steel rail (20).

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