Track reference line positioning mechanism and track reference line establishment method

Abstract

The present application relates to a track reference line positioning mechanism and a method for establishing a track reference line, which includes: at least two fixing devices that fix the two ends of the reference line; a fluid box that is arranged between the two fixing devices and contains a suspension fluid; a follower support member that is suspended by the suspension fluid and on which a support portion for supporting the reference line is fixed, and the support portion and the reference line are arranged to move synchronously in the horizontal direction. The follower support member supporting the reference line is easier to overcome the fluid resistance generated by the suspension fluid when moving than the friction force of the support plate when the reference line is horizontally offset in the related art. Therefore, the reference line can be smoothly reset to a smaller allowable deviation range after being swung by external environmental factors, effectively reducing the occurrence of the situation where the horizontal offset of the reference line does not meet the requirements, and realizing the smooth positioning of the reference line and the subsequent construction of the track.

Description

Technical Field

[0001] The present application relates to the technical field of track construction, and in particular to a track reference line positioning mechanism and a method for establishing a track reference line. Background Art

[0002] In actual engineering construction, it is necessary to set up multiple baselines, using them as reference lines to determine the location of various equipment and facilities. The baselines are affected by various factors. For example, if the baseline is too long, part of the baseline will deflect downward. In addition, due to environmental factors, the baseline will be slightly offset in the horizontal direction perpendicular to the extension direction when extended. Ultimately, the overall accuracy will change slightly. However, these slight changes are not allowed for high-precision measurement. For example, some tracks are hundreds of meters long and require a linear accuracy of up to ±0.05mm / m for local straightness and ±0.2mm for overall straightness. Therefore, the stability of the linear baseline must be strictly controlled during the track straightness adjustment process to meet the track's high-precision measurement and adjustment requirements.

[0003] In the related art, several spaced support plates are often used to support the baseline at multiple positions to reduce the degree of deflection of the baseline over long distances and reduce the amplitude of the baseline's horizontal swinging to improve the stability of the baseline.

[0004] However, under high-precision requirements, especially when the horizontal accuracy of the baseline is high, the allowable offset range is very small, which also makes the allowable offset range corresponding to the required driving force, that is, the external force on the baseline generated by environmental factors very small, even lower than the maximum static friction force exerted on the baseline on the support plate in the related technology. Therefore, when the baseline is swung by external force, it is very easy to exceed the allowable offset range, and during the resetting process of the baseline, the deformation force used for resetting will gradually decrease until it is lower than the maximum static friction force, which will cause the baseline to be unable to continue to be reset to the allowable offset range, and ultimately cause the accuracy of the baseline to fail to meet the requirements, and thus cannot meet the positioning needs of the high-precision baseline. Summary of the Invention

[0005] The embodiments of the present application provide a track reference line positioning mechanism and a method for establishing a track reference line to solve the problem that related technologies cannot meet the horizontal accuracy requirements of high-precision reference lines.

[0006] In the first aspect, a track reference line positioning mechanism is provided, which adopts the following technical solution:

[0007] A track reference line positioning mechanism, characterized in that it comprises:

[0008] at least two fixing devices, which fix two ends of the reference line;

[0009] a fluid box, which is disposed between the two fixing devices and contains a suspension fluid;

[0010] The follower supporting member is suspended on the suspension fluid, and a supporting portion for supporting the reference line is fixedly provided on the follower supporting member, and the supporting portion and the reference line are in a follower arrangement that moves synchronously in the horizontal direction.

[0011] In some embodiments, the fluid is a liquid fluid or a gaseous fluid.

[0012] In some embodiments, both ends of the follower support member in the horizontal direction are elliptical head-shaped or pointed structures.

[0013] In some embodiments, the supporting portion abuts against both sides of the reference line in the horizontal direction and supports the reference line from the bottom.

[0014] In some embodiments, the supporting portion is in abutment with two sides of the reference line in an inclined manner.

[0015] In some embodiments, at least three fixing devices are provided on the reference line, and a plurality of the follower supporting members are provided between adjacent fixing devices.

[0016] In some embodiments, the fixing device includes a fixing portion movably arranged in a horizontal direction, and the fixing portion fixes the reference line.

[0017] In some embodiments, the present invention further comprises:

[0018] A tensioning device is connected to the ends of the reference line and is configured to adjust the tension of the entire reference line.

[0019] In the second aspect, a method for establishing a track baseline is provided, which adopts the following technical solution:

[0020] A method for establishing a track baseline comprises the following steps:

[0021] Determine the endpoints of the baseline;

[0022] The reference line is positioned by the rail reference line positioning mechanism as described above.

[0023] In some embodiments, positioning the reference line by the track reference line positioning mechanism comprises the following steps:

[0024] Fixing the two endpoints of the reference line by the fixing device;

[0025] Determine a first point, a second point, and a third point sequentially and at intervals on a reference line between the two endpoint positions;

[0026] The follower supporting member is provided between the two end points of the reference line and the first point, the second point and the third point to support the reference line;

[0027] Acquiring lateral offset range data of the second point;

[0028] Obtaining a second position middle value according to the lateral offset range data of the second point, and providing a fixing device to fix the reference line at the second position middle value;

[0029] Acquiring lateral offset range data of the second point and the third point;

[0030] Obtaining a first position intermediate value and a third position intermediate value according to the respective lateral offset range data of the first point and the third point;

[0031] determining whether the first position middle value and the first position middle value are within a set lateral deviation range of the first position middle value;

[0032] If so, fixing devices are provided at the first point and the third point;

[0033] If not, redetermine the second position middle value.

[0034] The beneficial effects of the technical solution provided by this application include:

[0035] The embodiments of the present application provide a track baseline positioning mechanism and a method for establishing a track baseline. Since the follower supporting member supporting the baseline is more likely to overcome the fluid resistance generated by the suspension fluid when moving than the friction of the supporting plate when the baseline is horizontally offset in related technologies, the baseline can be smoothly reset to a smaller allowable deviation range after being swung by external environmental factors, effectively reducing the occurrence of the horizontal and lateral offset of the baseline that does not meet the requirements, thereby achieving smooth positioning of the baseline and subsequent track construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present application;

[0038] Figure 2A schematic diagram of part of the structure provided in the embodiment of the present application;

[0039] Figure 3 A schematic diagram of the fixing structure provided in an embodiment of the present application;

[0040] Figure 4 This is a schematic diagram of the structure of the tensioning device provided in an embodiment of the present application.

[0041] In the picture:

[0042] 1. Baseline;

[0043] 2. Fixing device; 20. Fixing portion; 21. Mounting frame; 22. Mounting rod;

[0044] 3. Fluid box;

[0045] 4. Follow-up supporting member; 40. Supporting part;

[0046] 5. Tensioning device; 50. Pulley frame; 51. Counterweight. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] Reference Figure 1 In a first aspect, the present application provides a track reference line positioning mechanism, which includes:

[0049] At least two fixing devices 2, which fix the two ends of the reference line 1;

[0050] A fluid box 3 is provided between the two fixing devices 2 and contains a suspension fluid;

[0051] The follower supporting member 4 is suspended by the suspension fluid, and a supporting portion 40 for supporting the reference line 1 is fixedly provided thereon, and the supporting portion 40 and the reference line 1 are in a follower arrangement that moves synchronously in the horizontal direction.

[0052] With this arrangement, since the follower supporting member 4 supporting the datum line 1 can more easily overcome the fluid resistance generated by the suspension fluid when moving than the friction of the supporting plate when the datum line 1 is horizontally and laterally offset in the related art, the datum line 1 can be smoothly reset to a smaller allowable deviation range after being swung by external environmental factors, effectively reducing the occurrence of the horizontal and lateral offset of the datum line 1 that does not meet the requirements, thereby achieving the smooth positioning of the datum line 1 and the subsequent track construction.

[0053] Optionally, the suspension fluid is a liquid fluid or a gaseous fluid.

[0054] Specifically, in this embodiment, the suspension fluid is preferably liquid water, so that the overall cost can be effectively controlled while being easy to implement. At the same time, the fluid resistance formed by the liquid water is small, which fully satisfies the requirement of resetting the baseline 1 and the follower support member 4 to the allowable, smaller deviation range.

[0055] In addition, in other embodiments, the suspension fluid can be other fluids, such as air, and the overall density of the follower support 4 is less than the density of air, such as a balloon filled with a gas with a density less than the density of air, so that it meets the suspension conditions and has a smaller flow resistance.

[0056] Optionally, both ends of the follower support member 4 in the horizontal direction are elliptical head-shaped or pointed structures.

[0057] Specifically, in this embodiment, the follower support member 4 is a follower boat with pointed bow structures at both ends, so that the fluid resistance it encounters when moving is smaller, making it easier for the subsequent baseline 1 to return to the allowable deviation range.

[0058] Optionally, the supporting portion 40 abuts against both sides of the reference line 1 in the horizontal direction, and supports the reference line 1 from the bottom.

[0059] With this arrangement, when the baseline 1 deviates and shakes in the horizontal direction, it can push the supporting part 40 to move together, thereby reducing the shaking frequency of the baseline 1 through the flow resistance experienced by the follower supporting part 4, and finally the baseline 1 can be gradually reset to the allowable deviation range.

[0060] Reference Figure 2 and Figure 3 Furthermore, the supporting portion 40 is in abutment with the two sides of the reference line 1 in an inclined manner.

[0061] In this embodiment, the support portions 40 are provided on the hull of the follower support member 4 on either side of the longitudinal direction of the datum line 1. They are slot-shaped structures, specifically having retaining members on either side that abut against the datum line 1. The hull portion between the retaining members supports the datum line 1. The retaining members are inclined, forming an inclined surface with the datum line 1. This allows the follower support member 4 to more easily move horizontally when the datum line 1 moves, facilitating subsequent repositioning.

[0062] Reference Figure 1 Optionally, at least three fixing devices 2 are provided on the reference line 1 , and a plurality of the follower supporting members 4 are provided between adjacent fixing devices 2 .

[0063] Among them, the two ends of the baseline 1 are fixed by two fixing devices 2, and a fixing device 2 is provided at the midpoint of the baseline 1, so that the midpoint of the baseline 1 is fixed on the straight line where the fixing devices 2 at both ends are located, thereby changing the longer baseline 1 into two sections of smaller baselines 1, so as to reduce the shaking amplitude of the two sections of the baseline 1 and improve the stability of the two sections of the baseline 1, and supplemented by the follow-up support member 4, finally achieving the improvement of the stability and accuracy of the overall baseline 1.

[0064] Specifically, in this embodiment, five fixing devices 2 are provided along baseline 1. Two fixing devices 2 are used to secure the two end regions of baseline 1, respectively. The remaining three fixing devices 2 are positioned at 1 / 4, 2 / 4, and 3 / 4 of baseline 1, dividing baseline 1 into four equal length sections. In actual operation, the final fixing positions of the fixing devices 2 at 1 / 4 and 3 / 4 are determined based on the fixing device 2 at 2 / 4.

[0065] Reference Figure 2 Optionally, the fixing device 2 includes a fixing portion 20 movably arranged in the horizontal direction, and the fixing portion 20 fixes the reference line 1.

[0066] Among them, the fixing device 2 specifically includes a mounting frame 21 fixed to the external environment, and the mounting frame 21 has a mounting rod 22 extending in the horizontal direction. The fixing part 20 is two fixing nuts threadedly sleeved on the mounting rod 22, which are moved in the horizontal direction by rotating on the mounting rod 22, and clamped to fix the reference line 1.

[0067] This arrangement reduces the installation requirements of the fixing device 2 in the external environment. By subsequently adjusting the position of the fixing portion 20, the horizontal position of the reference line 1 can be adjusted as needed, which is convenient, efficient and conducive to construction.

[0068] Reference Figure 4 , optionally, also includes:

[0069] The tensioning device 5 is connected to the end of the reference line 1 and is configured to adjust the tension of the entire reference line 1.

[0070] In this embodiment, the tensioning device 5 specifically comprises a pulley frame 50 and a counterweight. After the ends of the datum line 1 pass over the pulley frame 50, they are tensioned by the counterweight. The counterweight is suspended in the air, ensuring that the datum line 1 is always tensioned by the counterweight. After adjusting the overall tension of the datum line 1 using the counterweight, the ends of the datum line 1 can be secured using the fixing devices 2 at the ends.

[0071] In a second aspect, the present application provides a method for establishing a track reference line 1 .

[0072] A method for establishing a track reference line 1 comprises the following steps:

[0073] S100, determining the endpoint positions of both ends of baseline 1;

[0074] S200 , positioning the reference line 1 using the track reference line positioning mechanism as described above.

[0075] With this arrangement, the baseline 1 is offset controlled by the follower support member 4 suspended in the suspension fluid in the track baseline positioning mechanism, which reduces the swing amplitude of the baseline 1 and improves the accuracy of the final positioning of the baseline 1.

[0076] Optionally, the step S200, positioning the reference line 1 by the track reference line positioning mechanism, includes the following steps:

[0077] S210, fixing the two end points of the reference line 1 by the fixing device 2;

[0078] S220, sequentially and spaced apart, determining a first point, a second point, and a third point on the reference line 1 between the two endpoint positions;

[0079] S230, disposing the follower supporting member 4 between the two end points of the reference line 1 and the first point, the second point, and the third point to support the reference line 1;

[0080] S240: Acquire lateral offset range data of the second point;

[0081] S250, obtaining a second position middle value according to the lateral offset range data of the second point, and setting a fixing device 2 to fix the reference line 1 at the second position middle value;

[0082] S260: Acquire lateral offset range data of the second point and the third point;

[0083] S270: Obtain a first position median value and a third position median value according to the respective lateral offset range data of the first point and the third point;

[0084] S280, determining whether the first position middle value and the first position middle value are within a set lateral deviation range of the first position middle value;

[0085] S291: If yes, install a fixing device 2 at the first point and the third point;

[0086] S292: If not, redetermine the second position middle value.

[0087] The first, second, and third points are located at 1 / 4, 2 / 4, and 3 / 4 of baseline 1, respectively. Because the lateral offset range data for the second point is obtained through the action of the support follower and the suspension liquid, it can better reflect the symmetrical offset distance of baseline 1 on both sides of the ideal straight line, ultimately obtaining a relatively accurate second position intermediate value to be used as the actual position for fixing. Furthermore, after fixing, the intermediate values ​​subsequently measured at the first and second points can be used to determine whether the three intermediate values ​​are within the set lateral deviation range. If so, it can be considered that all three positions of baseline 1 meet the accuracy standard, thereby confirming that the overall baseline 1 is within the accuracy requirements.

[0088] Specifically, in the process of obtaining the lateral offset range of the first point, the second point and the third point, mark the three positions of 11 / 4, 2 / 4 and 3 / 4 of the baseline to monitor the swing range of the baseline 1. Each position is monitored 6 times in three days, once in the morning and once in the afternoon. Each monitoring time for each position is not less than 30 minutes. During this period, artificial disturbances can be made from both ends or the middle, and stable readings are recorded for not less than 6 times. The position median value (i.e., the average value) of the three positions of the above baseline 1 is calculated. After obtaining the median value of each position, the fixing device 2 is installed to fix the baseline 1 at the 2 / 4 position of the baseline 1, and the microscope is used to monitor and adjust the steel wire to the second position median value of the baseline 1 at this position. The baseline 1 bracket is locked to fix the baseline 1. At the 1 / 4 and 3 / 4 positions of the baseline 1 length, the swing range of the baseline 1 is monitored with a microscope. If the position median value of the swing range of the baseline 1 at these two positions is basically equal to the second position median value, that is, it is within the set lateral deviation range, it is considered that the steel wire has no horizontal lateral bending, and the baseline 1 can be used as a measurement reference.

[0089] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0090] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0091] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A method for establishing a track reference line, characterized in that: It includes: Determine the endpoint positions of both ends of the baseline (1); Positioning the reference line (1) using a track reference line positioning mechanism; The track reference line positioning mechanism includes: at least two fixing devices (2) for fixing two ends of the reference line (1); a fluid box (3), which is arranged between the two fixing devices (2) and contains a suspension fluid; A follower support member (4) is suspended by the suspension fluid, and a support portion (40) for supporting the reference line (1) is fixedly provided thereon, and the support portion (40) and the reference line (1) are arranged to follow the support member so as to move synchronously in the horizontal direction; Positioning the reference line (1) by a track reference line positioning mechanism comprises the following steps: Fixing the two end points of the reference line (1) by the fixing device (2); Determining a first point, a second point, and a third point sequentially and at intervals on a reference line (1) between the two end points; The follower support member (4) is provided between the two end points of the reference line (1) and the first point, the second point, and the third point to support the reference line (1); Acquiring lateral offset range data of the second point; A second position intermediate value is obtained based on the lateral offset range data of the second point, and a fixing device (2) is provided at the second position intermediate value to fix the reference line (1); Acquiring lateral offset range data of the second point and the third point; Obtaining a first position intermediate value and a third position intermediate value according to the respective lateral offset range data of the first point and the third point; determining whether the first position middle value and the first position middle value are within a set lateral deviation range of the first position middle value; If so, a fixing device (2) is provided at the first point and the third point; If not, redetermine the second position middle value.

2. The method for establishing a track reference line according to claim 1, wherein: The suspension fluid is a liquid fluid or a gaseous fluid.

3. The method for establishing a track reference line according to claim 1, wherein: The two ends of the follower support member (4) in the horizontal direction are in the shape of an elliptical head or a pointed structure.

4. The method for establishing a track reference line according to claim 1, wherein: The supporting portion (40) abuts against both sides of the reference line (1) in the horizontal direction, and supports the reference line (1) from the bottom.

5. The method for establishing a track reference line according to claim 4, wherein: The supporting portion (40) is in abutment with the two sides of the reference line (1) in an inclined manner.

6. The method for establishing a track reference line according to claim 1, wherein: At least three fixing devices (2) are provided on the reference line (1), and a plurality of follower supporting members (4) are provided between adjacent fixing devices (2).

7. The method for establishing a track reference line according to claim 1, wherein: The fixing device (2) comprises a fixing portion (20) movably arranged in a horizontal direction, and the fixing portion (20) fixes the reference line (1).

8. The method for establishing a track reference line according to claim 1, wherein: Also includes: A tensioning device (5) is connected to the end of the reference line (1) and is configured to adjust the tension of the entire reference line (1).

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