High-speed maglev track beam stator surface measurement construction method

Abstract

The invention relates to the field of high-speed maglev track construction, in particular to a high-speed maglev track beam stator surface measurement construction method. Firstly, a track beam is installed in place, after the track beam is finely adjusted in place, the position of an embedded sleeve is rechecked, then a stator surface is installed and measured, stator transverse spacing measurement is carried out through cooperation of a self-designed magnetic attraction prism and a Leica TS60 total station, stator longitudinal spacing measurement is carried out through a digital display vernier caliper, and the measurement accuracy is improved. The distance between adjacent stator surfaces is measured by adopting a knife ruler and a feeler gauge, then the stator surfaces are finely adjusted in place, and finally winding installation is carried out; when the construction measurement method is used for track beam stator surface measurement, measurement can be continuously carried out on site in real time, the measurement precision of the stator surface can reach 0.02 mm, and the measurement precision of the stator distance can reach 0.01 mm. The construction method not only remarkably improves the measurement precision, but also greatly saves time and labor intensity required by measurement.

Description

Technical Field

[0001] The present invention relates to the field of high-speed maglev track construction, and particularly to a construction method for measuring the stator surface of a high-speed maglev track beam. Background Art

[0002] High-speed maglev trains have the characteristics of high running speed and strong stability, and have very high requirements for the spatial position accuracy of the track. It is required that the installation accuracies such as the lateral spacing, longitudinal spacing, and stator surface of the maglev stator must meet the design requirements. The stator plays a very important role, mainly providing a magnetic field for driving the train to levitate and move forward. The installation accuracy requirement for the stator plane is within ±2 mm, and the vertical installation accuracy requirements are within ±0.4 mm within the beam span and within 0.6 mm at the beam end. Therefore, there are very high requirements for the installation accuracy of the stator. Therefore, how to achieve the installation of a high-precision stator is a difficult point. Summary of the Invention

[0003] The purpose of the present invention is to provide a construction method for measuring the stator surface of a high-speed maglev track beam.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A construction method for measuring the stator surface of a high-speed maglev track beam, comprising the following steps:

[0005] (1) Fine-tune the track beam to the correct position;

[0006] (2) Recheck the positions of the embedded sleeves, and recheck that the lateral and longitudinal spacings of the bolt holes of the embedded sleeves meet the design requirements;

[0007] (3) Install the stator on the track beam, and arrange the left and right stators on both sides of the track beam symmetrically;

[0008] (4) Use a digital vernier caliper to measure whether the longitudinal spacing of the stator is qualified, and proceed to the next step after passing;

[0009] (5) Measure the bottom and side surfaces of adjacent stators. If qualified, proceed to the next step; if unqualified, use a feeler gauge to measure the size of the gap, finely adjust the stator surface, and proceed to the next step after passing;

[0010] (6) Measure the lateral spacing of the stator surface, and proceed to the next step after passing;

[0011] (7) Install the windings.

[0012] As a further limitation of the technical solution of the present invention, in step (1), a Leica TS60 high-precision total station is used for accurate positioning of the plane position.

[0013] As a further limitation of the technical solution of the present invention, the steps of measuring the bottom surface and side surface of adjacent stators in step (5) are as follows: after completing the measurement of the stator spacing, place a knife ruler on the bottom of the adjacent stators and the side surface of the stator respectively, and confirm whether the knife ruler can be completely close to the stator. If it can be completely close, it means that the stators are on the same plane. If there is a gap where the knife ruler is close to the stator surface, it means that the stators are not on the same plane. At this time, put feeler gauges of different thicknesses into the gap for measurement, measure the size of the gap through the feeler gauge, and finely adjust the stator surface to ensure that the relative position relationship between all stators meets the design requirements.

[0014] As a further limitation of the technical solution of the present invention, the measurement of the transverse spacing of the stators in step (6) is mainly to measure the center distance between the symmetric stators on both sides of the track beam. The specific measurement process is as follows: place the magnetic absorption prism on the bottom surface of the stator so that it is in close contact with the bottom surface of the stator, ensuring that the center of the magnetic absorption prism coincides with the center of the stator. After the magnetic absorption prism is placed, collect the plane coordinates of the magnetic absorption prism through the Leica ts60 total station, thereby obtaining the plane coordinates of the stator center. After collecting the plane coordinates of the stator center on one side of the track beam, place the magnetic absorption prism on the symmetric stator on the other side of the track beam. Similarly, collect the stator center data on the other side through the Leica ts60 total station. Finally, calculate the transverse distance between the stator centers collected on both sides through distance inversion.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The construction method for the stator surface of the present invention has high measurement accuracy. The digital display vernier caliper is used for measuring the longitudinal spacing of the stators, the knife ruler is used in cooperation with the feeler gauge for measuring the spacing between adjacent stator surfaces, and the self-designed magnetic absorption prism is used in cooperation with the Leica TS60 total station for measuring the transverse spacing of the stators. The measurement accuracy can reach 0.01 mm. Through this measurement method, the measurement accuracy is greatly improved.

[0017] The construction method of the present invention has the characteristics of simple operation, low cost, repeatable utilization, and high work efficiency. For the measurement of the stator surface, the data collected during the measurement process can be displayed in a timely manner, which can provide reference and guidance for similar measurement projects.

[0018] The construction method of the present invention is applicable to the measurement of the stator surface of the high-speed maglev track, the smoothness measurement of the beam end, the measurement of the stator surface of the medium and low-speed maglev, and the misalignment measurement of the track functional components, and is applicable to similar measurements of other structures.

[0019] Compared with the conventional measurement methods, the construction method of the present invention can continuously and real-time measure the stator surface of the track beam on-site when using the construction measurement method of the present invention. The measurement accuracy of the stator surface can reach 0.02 mm, and the measurement accuracy of the stator spacing can reach 0.01 mm. Compared with the traditional measurement methods, it reduces the time for in-house data processing. While ensuring the accuracy, the work efficiency is also significantly improved, and the measurement work efficiency is remarkably enhanced. The construction method of the present invention not only significantly improves the measurement accuracy, but also greatly saves the time and labor intensity required for measurement, and has good social benefits. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of a magnetic adsorption prism.

[0021] Figure 2 It is a schematic diagram of measuring the longitudinal spacing of the stator.

[0022] Figure 3 It is a schematic diagram of measuring the stator surface. Detailed Embodiments

[0023] The present invention will be further described below in conjunction with specific embodiments.

[0024] Embodiment 1

[0025] Apply the construction method of the present invention to measure the stator surface of the concrete track beam and steel beam of the 600 km / h high-speed maglev commissioning platform in Qingdao:

[0026] Limit requirements for precise measurement of the stator surface

[0027] The left and right stators on both sides of the track beam are symmetrically arranged, and the technical indicators of the stator surface are shown in Table 1 below.

[0028] Table 1 Technical indicators of the stator surface

[0029]

[0030] Design the magnetic adsorption prism

[0031] First, design the base of the magnetic adsorption prism according to the geometric dimensions of the stator surface, so that the base of the magnetic adsorption prism can be completely attached to the stator surface by magnetic force. Second, stably connect the connecting rod member to the base of the magnetic adsorption prism through bolts. Third, fabricate the prism head through precision instruments, and the prism head has the same precision as the Leica circular prism. Fourth, reliably connect the prism head to the connecting rod member, and finally assemble a magnetic adsorption prism device that can cooperate with the Leica ts60 total station to measure the longitudinal spacing of the stator, as Figure 1 shown.

[0032] The specific steps are as follows:

[0033] (1) Precise positioning of the track beam

[0034] The precise positioning of the plane position is carried out by using a Leica TS60 high-precision total station. When measuring the plane position, it is necessary to ensure that the temperature in the workshop is constant and the light is normal to reduce the influence of the external environment on the measurement accuracy. When measuring the elevation, the national second-class leveling method is used to control the elevation of the track beam.

[0035] (2) Recheck of the position of the embedded sleeve

[0036] After the track beam is finely adjusted in place, recheck the position of the embedded sleeve to ensure that the position of the embedded sleeve is correct. The embedded sleeve mainly rechecks that the transverse and longitudinal spacings of the bolt holes of the embedded sleeve meet the design requirements.

[0037] (3) Installation of the stator

[0038] After rechecking the position of the embedded sleeve to ensure that the position of the embedded sleeve is correct, install and measure the stator surface.

[0039] (4) Measurement of the longitudinal spacing of the stator

[0040] After the stator is installed in place and before the precise measurement of the stator surface, wipe the stator surface clean with cotton yarn. The purpose is to improve the measurement accuracy and prevent other hard substances on the stator surface from damaging the high-precision digital display vernier caliper. After the stator surface is wiped clean, measure the distance between the stators by using a high-precision digital display vernier caliper. Before using the high-precision digital display vernier caliper for measurement, zero the data on the high-precision digital display vernier caliper. Measure the left, middle, and right three parts at the ends of the two stators respectively. The purpose is to ensure that the two stators are longitudinally in a straight line. Measure the longitudinal spacing of the stators on the track beam according to this step. For the stators that do not meet the longitudinal spacing, adjust them according to the design requirements. The measurement results are shown in Table 2 below.

[0041] Table 2 Measurement results of the longitudinal spacing of the stator

[0042]

[0043] (5) Measurement of the spacing between adjacent stator surfaces

[0044] After completing the measurement of the stator spacing, place the knife ruler at the bottom and side of adjacent stators respectively, and confirm whether the knife ruler can fully adhere to the stator. If it can fully adhere, it means that the stators are on the same plane. If there is a gap where the knife ruler adheres to the stator surface, it means that the stators are not on the same plane. At this time, put feeler gauges of different thicknesses into the gap for measurement, and measure the size of the gap through the feeler gauge. When the data fully meets the requirements, measure all the stator bottom surfaces and side surfaces in turn according to this method to ensure that the relative position relationship between all stators meets the design requirements. The measurement results of the stator bottom surface and side surface spacing are shown in Table 3 below.

[0045] Table 3 Measurement Results of Stator Bottom Surface and Side Surface Spacing

[0046] Dot Measured elevation Design elevation Measured - Design (mm) N19.01 15.35011 15.35 0.11 N19.02 15.34994 15.35 -0.06 N19.03 15.34986 15.35 -0.14 N19.04 15.34968 15.35 -0.32 N19.05 15.34976 15.35 -0.24 N19.06 15.34964 15.35 -0.36 N19.07 15.34978 15.35 -0.22 N19.08 15.34985 15.35 -0.15 N19.09 15.34986 15.35 -0.14 N19.10 15.34997 15.35 -0.03 N19.11 15.3498 15.35 -0.20

[0047] (6) Measurement of Stator Transverse Spacing

[0048] The measurement of the stator transverse spacing is mainly to measure the center distance between the stators symmetric on both sides of the track beam, and ensure that the transverse spacing is 1525mm ± 2mm. The specific measurement process: Place the magnetic adsorption prism on the stator bottom surface so that it is in close contact with the stator bottom surface, ensuring that the center of the magnetic adsorption prism coincides with the stator center.

[0049] After the magnetic adsorption prism is installed, collect the plane coordinates of the magnetic adsorption prism through the Leica ts60 total station, so as to obtain the plane coordinates of the stator center. After collecting the plane coordinates of the stator center on one side of the track beam, place the magnetic adsorption prism on the stator symmetric to the other side of the track beam. Similarly, collect the stator center data on the other side through the Leica ts60 total station. Finally, calculate the stator center transverse distance by distance inversion based on the stator center coordinates collected on both sides. The measurement results of the stator transverse spacing are shown in Table 4 below.

[0050] Table 4 Measurement Results of Stator Transverse Spacing

[0051]

[0052] (7) Installation of Windings

[0053] After the stator transverse spacing, longitudinal spacing, and stator bottom surface and side surface spacing are measured and qualified, the windings can be installed.

[0054] The construction method of the present invention is applied to the measurement of the concrete track beam and steel beam stator surfaces of the 600 km / h high-speed maglev commissioning platform in Qingdao. Using this construction method has the characteristics of accurate measurement, reliable stability of measurement accuracy, reduced labor intensity, and improved construction production efficiency, bringing good economic and social benefits.

Claims

1. A construction method for measuring the stator surface of a high-speed maglev track beam, characterized in that It includes the following steps: (1) Fine-tune the track beam to the correct position; (2) Recheck the positions of the embedded sleeves, and ensure that the transverse and longitudinal spacings of the bolt holes of the embedded sleeves meet the design requirements; (3) Install the stator on the track beam, and arrange the left and right stators symmetrically on both sides of the track beam; (4) Use a digital display vernier caliper to measure whether the longitudinal spacing of the stator is qualified. If it is qualified, proceed to the next step; (5) Measure the bottom and side surfaces of adjacent stators. If it is qualified, proceed to the next step; if not, use a feeler gauge to measure the size of the gap, fine-tune the stator surface, and proceed to the next step after it is qualified; (6) Measure the transverse spacing of the stator surface. If it is qualified, proceed to the next step; (7) Install the winding.

2. The construction method for measuring the stator surface of a high-speed maglev track beam according to claim 1, characterized in that In step (1), a Leica TS60 high-precision total station is used for precise positioning of the plane position.

3. The construction method for measuring the stator surface of the high-speed maglev track beam according to claim 1 is characterized in that, The steps for measuring the bottom and side surfaces of adjacent stators in step (5) are as follows: After completing the measurement of the stator spacing, place a knife ruler on the bottom and side of adjacent stators respectively, and confirm whether the knife ruler can be completely close to the stator. If it can be completely close, it means that the stators are on the same plane. If there is a gap where the knife ruler is close to the stator surface, it means that the stators are not on the same plane. At this time, put feeler gauges of different thicknesses into the gap for measurement, measure the size of the gap through the feeler gauge, and fine-tune the stator surface to ensure that the relative position relationship between all stators meets the design requirements.

4. The construction method for measuring the stator surface of the high-speed maglev track beam according to claim 1, characterized in that, The measurement of the transverse spacing of the stator in step (6) is mainly to measure the center distance between the stators symmetrically arranged on both sides of the track beam. The specific measurement process is as follows: Place the magnetic prism on the bottom surface of the stator so that it is in close contact with the bottom surface of the stator, ensuring that the center of the magnetic prism coincides with the center of the stator. After the magnetic prism is installed, collect the plane coordinates of the magnetic prism through a Leica ts60 total station, thereby obtaining the plane coordinates of the stator center. After collecting the plane coordinates of the stator center on one side of the track beam, place the magnetic prism on the stator symmetrically arranged on the other side of the track beam. Similarly, collect the data of the stator center on the other side through a Leica ts60 total station. Finally, calculate the transverse distance of the stator center by distance inversion based on the stator center coordinates collected on both sides.

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