CN112710226A - Track jaw face test fixture and application and track jaw face test device based on same - Google Patents

Track jaw face test fixture and application and track jaw face test device based on same Download PDF

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Publication number
CN112710226A
CN112710226A CN202011541023.5A CN202011541023A CN112710226A CN 112710226 A CN112710226 A CN 112710226A CN 202011541023 A CN202011541023 A CN 202011541023A CN 112710226 A CN112710226 A CN 112710226A
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CN
China
Prior art keywords
track
rail
jaw
test fixture
sliding block
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Pending
Application number
CN202011541023.5A
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Chinese (zh)
Inventor
赵建平
刘振
孙亚川
董龙雷
党天骄
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Xian Jiaotong University
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Xian Jiaotong University
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Publication date
Application filed by Xian Jiaotong University filed Critical Xian Jiaotong University
Priority to CN202011541023.5A priority Critical patent/CN112710226A/en
Publication of CN112710226A publication Critical patent/CN112710226A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/34—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring roughness or irregularity of surfaces
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B35/00—Applications of measuring apparatus or devices for track-building purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates

Abstract

The invention discloses a rail jaw surface test fixture, application thereof and a rail jaw surface test device based on the same, and belongs to the technical field of rail unevenness measurement devices. The rail jaw surface test fixture comprises a sliding block, wherein a pressing block is arranged at one end, attached to the top surface of a rail, of the sliding block, and the pressing block is used for maintaining the attached state of the sliding block and the side surface of the rail when the sliding block moves along the rail; the one end of slider and the laminating of track side is equipped with the sensor support, is equipped with the seat hole that is used for placing the sensor on the sensor support, and the seat hole axial is perpendicular with the track jaw face. In the track jaw surface testing device, a capacitance displacement sensor is arranged in a seat hole. The track jaw surface test fixture is used for testing the unevenness of the track jaw surface of the rocket sled, high-precision measurement in a narrow space of the track jaw surface is achieved, the track jaw surface test fixture has the advantages of being non-contact, free of friction and abrasion and the like, and the track measurement requirements in the field of rocket sledges are met.

Description

Track jaw face test fixture and application and track jaw face test device based on same
Technical Field
The invention belongs to the technical field of rail unevenness measuring devices, and relates to a rail jaw surface testing clamp, application thereof and a rail jaw surface testing device based on the rail jaw surface testing clamp.
Background
The rail measurement is an important link for construction, maintenance and repair of the rail, and is a key technology for ensuring reasonable configuration of the rail and safe and stable operation of the rail loader. The conventional rocket sledge is low in speed and small in lifting force of a sledge body, so that when the rocket sledge normally runs, the sliding shoes are only in contact with the top surface and the side surface of the track and are not in contact with the jaw surface, the requirement on the jaw surface is not high, and the jaw surface is not usually detected and measured. When the rocket sled runs at a hypersonic speed, because the speed is high and the lift force is large, the sliding shoe of the rocket sled can be in contact with the jaw surface of the track during normal running, and the running stability of the sled body is extremely sensitive to the smoothness of the track, so that the unevenness of the jaw surface of the track needs to be measured. With the development of railway transportation, a rail measuring tool is developed to a rail inspection instrument, a rail inspection trolley, a dynamic rail inspection vehicle and the like with higher integration degree from the most original chord line and a track scale [ bovine clunian, aged, Zhang-quan, Zhang-Ping, Liu Jing-nan ] an INS/GNSS-based rail irregularity detection system and method [ P ]. Hubei: CN103343498A,2013-10-09 ], the technology adopted for measurement is developed from original graduated scales and bubble levels to displacement sensors [ luozi, zhuangguo, wei shi biography, gu' an. track comprehensive measuring instrument [ P ]. shanghai: CN2473089,2002-01-23 ], an acceleration sensor, an optical measurement (a total station, a tracker [ how, chengyu, li repa, li gui ] a target ball fixing device of a laser tracker and its application [ P ]. shanghai: CN103292726A,2013-09-11 ], a laser targeting measurement [ gibringin ] a system and a method for detecting rail flatness [ P ]. inner Mongolia: CN104554341A,2015-04-29, gibringin ] a rail flatness detection device [ P ]. inner Mongolia: CN104554342A,2015-04-29 ], an Inertial Navigation System (INS) and a Global Navigation Satellite System (GNSS) measurement (gyroscope, GPS). The main track parameters measured by the existing measuring equipment and instrument are track gauge, level, super-high and the like, and no reference is made to the measurement of the jaw face of the railhead. With the updating of measurement technology, although the precision and the efficiency are continuously improved, the high-precision measurement technology equipment facing the rocket sled orbit is not fully developed.
In addition, the prior art and the prior equipment mainly meet the requirements of transportation rails, no reference is made to the measurement of the jaw surface of the rail, the jaw surface of the rail faces the ground, the space is narrow, an optical measurement blind area is formed, and the equipment such as a laser tracker cannot directly measure the jaw surface. The acceleration sensor is not suitable for long-distance measurement because the error accumulation is caused by the need of twice integration. An Inertial Navigation System (INS) and a Global Navigation Satellite System (GNSS) are mainly used for the attitude measurement of a railway track inspection vehicle, are not suitable for the measurement of the jaw face of a track, and are not suitable for the measurement of the measurement accuracy of a rocket track, the deviation of the height irregularity of the track required by the railway track is 2mm (chord length 10m) [ TB 10082-.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a track jaw surface test fixture, application and a track jaw surface test device based on the track jaw surface test fixture, so that high-precision measurement of a track jaw surface is realized.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the invention discloses a track jaw surface test fixture which comprises a sliding block, wherein a pressing block is arranged at one end, attached to the top surface of a track, of the sliding block, and the pressing block is used for maintaining the attached state of the sliding block and the side surface of the track when the sliding block moves along the track; the one end of slider and the laminating of track side is equipped with the sensor support, is equipped with the seat hole that is used for placing the sensor on the sensor support, and the seat hole axial is perpendicular with the track jaw face.
Preferably, the slide block is provided with a marking stop block for positioning the point to be measured, and the marking stop block is attached to the top surface of the rail.
Preferably, the contact surface of the slider with the sensor support is parallel to the jaw surface of the rail.
Preferably, a spring pressure device is arranged in the pressing block and is in contact with the side face of the track; the spring pressure device comprises an adjusting bolt, a spring guide rod and a steel ball in contact with the side face of the rail, which are sequentially connected, and a ball retaining piece used for preventing the steel ball from falling off is arranged on the pressing block.
Preferably, the slider is an L-shaped slider, and a tool withdrawal groove is formed at the inner corner of the L-shaped slider.
Preferably, the top of the sliding block is provided with a mounting hole for fixing the signal modulation device; and a gasket for fixing the sensor is arranged on the seat hole.
The invention also discloses a device for testing the jaw surface of the track, which comprises: the capacitance displacement sensor is arranged in a seat hole of the track jaw face testing clamp.
The invention also discloses application of the rail jaw surface test fixture in testing the unevenness of the rail jaw surface of the rocket sled.
Preferably, the method comprises the following steps:
1) placing a sliding block at a to-be-detected starting point of a rocket sled track, and connecting a sensor support, a marking stop block and a pressing block assembly with the sliding block in sequence to enable the sliding block to move on the rocket sled track in a fitting manner; the displacement sensor is arranged in a seat hole of the sensor support, and the measuring end of the displacement sensor is kept parallel to the jaw surface of the rocket sled track;
2) and aligning the marking stop block to a mark of a point to be measured of the rocket sled track for measurement, storing measurement data of the point to be measured, moving the track jaw surface test fixture, and enabling the displacement sensor to move to the next point to be measured along the rocket sled track jaw surface for measurement and storing the measurement data.
Further preferably, the displacement sensor is a capacitance displacement sensor, a preamplifier, a signal conditioner and a PC are externally connected with the capacitance displacement sensor, and the displacement sensor is matched with the laser tracker for use.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a track jaw surface test fixture, which is characterized in that a pressing block and a sensor support are respectively arranged on a sliding block, so that the sliding block can move along a track in a fitting manner, the track jaw surface test fixture is suitable for long-distance multi-point measurement and is favorable for being used in a matched manner with any track sample section in a dismounting manner. Therefore, the rail jaw surface test fixture has the advantages of reasonable structural design, simplicity in installation, easiness in operation, stability and high efficiency in measurement, and realizes high-precision measurement in a narrow space of the rail jaw surface.
Furthermore, the marking stop block for positioning the measuring point is arranged on the sliding block, so that the effect of calibrating the precision of the measuring point can be achieved, and the measuring accuracy is improved; in addition, the marking stop block and the sensor support are designed in a split mode and can be adapted to sensors of different sizes and models.
Further, by arranging the contact surface of the slider and the sensor support to be parallel to the rail jaw surface, it can be ensured that the top surface of the sensor is parallel to the rail jaw surface.
Furthermore, a spring pressure device with a steel ball is adopted, a pressing block and the side face of the rail are in a rolling friction state, and the rail jaw face test fixture can conveniently move on the rail integrally.
Further, by providing the relief grooves at the inner corners, sufficient contact of the slider with the rail side surfaces and the rail top surface can be ensured at the same time.
Furthermore, the top of the sliding block is provided with the mounting hole for fixing the conditioner, so that the device can be applied to other measurement auxiliary devices, and the measurement precision is improved.
The invention also discloses a track jaw surface testing device based on the track jaw surface testing clamp, and the high-precision measurement of the unevenness of the track jaw surface of the rocket sled can be realized through the matched use of the capacitive displacement sensor and the track jaw surface testing clamp.
The invention also discloses application of the rail jaw surface test fixture in testing the unevenness of the rail jaw surface of the rocket sled. The invention provides an idea for measuring the unevenness of the track jaw surface of the rocket sled, realizes high-precision measurement in a narrow space of the track jaw surface, and has the advantages of non-contact, no friction and wear and the like due to the use of the capacitive displacement sensor.
Furthermore, in specific use, a capacitive displacement sensor, a preamplifier, a signal conditioner and an external signal modulation device at the PC end can be selected, a high-precision laser tracker is combined to measure the top surface and the side surface of the track at the point to be measured of the track of the rocket sled, so that the absolute coordinates of the side surface and the top surface of the track at the position of each point to be measured in a sample section are obtained, and the absolute offset of the jaw surface can be calculated by matching with the relative offset of the jaw surface measured by the capacitive displacement sensor, so that the high-precision measurement of the jaw surface of the track can be realized, and the requirement of the track measurement in the field of the rocket sled can be.
Drawings
FIG. 1 is an assembly view of the track jaw face test fixture of the present invention with a track;
FIG. 2 is a schematic structural view of a slider according to the present invention; wherein, (a) is a front view, and (b) is a top view;
FIG. 3 is a view of three end faces of a slider, wherein the direction A is a connecting end face of the slider and a sensor support, the direction B is a connecting end face of the slider and a pressing block, and the direction C shows a mounting threaded hole of the sensor support;
FIG. 4 is a schematic structural view of a compact of the present invention;
FIG. 5 is a cross-sectional view of FIG. 4 (B-B);
FIG. 6 is a schematic structural view of a ball stop according to the present invention;
FIG. 7 is a cross-sectional view of FIG. 6 (A-A);
FIG. 8 is a schematic view of the spring guide bar of the present invention;
FIG. 9 is a schematic view of the structure of the scribing block in the present invention; wherein (a) is a top view and (b) is a cross-sectional view;
FIG. 10 is a schematic view of a sensor mount according to the present invention;
FIG. 11 is an A-side end view of the sensor mount;
FIG. 12 is a cross-sectional view of FIG. 10 (B-B);
FIG. 13 is a schematic view of a gasket according to the present invention; wherein (a) is a top view and (b) is a cross-sectional view;
FIG. 14 is a graph of rail head sizing according to the present invention;
FIG. 15 is a schematic wiring diagram of the displacement sensor of the present invention;
FIG. 16 is a diagram illustrating the measurement result of the unevenness of the jaw face of the rail at a 30-meter sample section in the embodiment;
FIG. 17 is a perspective view of the assembly of the rail jaw face test fixture of the present invention with a rail;
figure 18 is a perspective view of the track jaw face test fixture of the present invention.
Wherein: 1-a sensor support; 2-a gasket; 3-a slide block; 4-marking off a stop block; 5, pressing blocks; 6-a spring; 7-adjusting the bolt; 8-spring guide rod; 9-steel ball; 10-ball catch; 11-a displacement sensor; 12-a seat hole; 13-a preamplifier; 14-Signal conditioner and PC.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the following figures and specific examples:
referring to fig. 1 and 18, the rail jaw surface test fixture disclosed by the invention is mainly divided into four parts, namely a sliding block 3, a pressing block 5, a sensor support 1 and a marking stop 4. Slider 3 and compact heap 5 pass through bolted connection, and the convenience is at arbitrary track appearance section dismouting. Two groups of springs 6 are arranged on the pressing block 5, and the springs 6 are used for tensioning and fitting the sliding block on the track through spring guide rods 8 and steel balls 9. The sensor holder 1 is used for mounting a displacement sensor 11, which is mounted in a holder hole 12. The marking block 4 is used for positioning the point to be measured on the track, as can be seen from fig. 17.
The slider 3 is a main body part of the test fixture, and is L-shaped, and a main plan view and each connection end surface thereof are respectively shown in fig. 2 and 3. The provision of relief grooves at the inside corners of the slider 3 facilitates the machining of the right angle configuration therein while ensuring adequate contact with the rail side and top surfaces. The top of the slider is provided with four mounting holes for fixing a signal modulation device of the capacitance displacement sensor (as shown in fig. 15, the signal modulation device comprises a preamplifier 13, a signal conditioner, a PC14 and the like).
The front view and the cross section of the pressing block 5 are shown in fig. 4 and 5, the upper three through holes are used for being connected with the sliding block 3, the lower two through holes are used for placing the spring 6, the spring guide rod 8 and the steel ball 9, the left thread of the pressing block can be provided with the adjusting bolt 7 to adjust the tightness of the spring, and four counter bores are respectively arranged around the spring hole and used for installing the ball retaining sheet 10. The ball retainer 10 and the spring guide bar 8 are shown in fig. 6 to 7 and 8, respectively. The steel ball 9 is adopted to change sliding friction into rolling friction, so that the pressing block 5 can conveniently move the clamp on the rail.
The front view and the sectional view of the marking stop 4 are shown in fig. 9, and the marking stop 4 and the sensor support 1 adopt a split design and can be adapted to capacitance displacement sensors with different sizes and models.
Fig. 10 to 12 show a front view, a sectional view, and an end view of the sensor holder 1, the capacitance displacement sensor is placed in the holder hole and fixed by the spacer 2, and the spacer 2 is shown in fig. 13.
The invention also discloses a track jaw surface testing device based on the track jaw surface testing fixture, which comprises a capacitive displacement sensor and the track jaw surface testing fixture, wherein the capacitive displacement sensor is arranged in a seat hole 12 of the track jaw surface testing fixture. The measuring device can measure the unevenness change of the jaw face of the rail relative to the top face of the rail by matching the capacitance displacement sensor with the rail jaw face testing clamp.
The invention also discloses application of the rail jaw surface test fixture in testing the unevenness of the rail jaw surface of the rocket sled. Taking the measurement of the monorail jaw surface of the rocket sled track as an example, the use process and the measurement result of the measuring clamp are described, and the measuring clamp comprises the following steps:
1) the slider 3 is placed at the start of the track-like section as shown in fig. 17, and the sensor holder 1, the scribing stopper 4, the pressing block 5, and the like are mounted on the slider 3 in this order.
A capacitance displacement sensor is used as a displacement sensor 11, the capacitance displacement sensor is connected with a preamplifier 13, a signal conditioner and a PC14, and data acquisition software is started to wait for measurement.
Adjusting the adjusting bolt 7 to enable the sliding block 3 to be tightly attached to the track, and meanwhile, the jaw surface test fixture of the track is convenient to move on the track.
2) And aligning the marking stop 4 with the measuring point mark, storing the measuring data, moving the track jaw surface testing clamp and aligning with the next measuring point, storing the measuring data and repeating the steps until the end point of the sample section.
Specifically, in the embodiment of the present invention, if the absolute coordinates of the jaw surface measuring point are to be obtained, the measurement results of the top surface and the side surface at the measuring point need to be calculated and derived in cooperation with other equipment such as a laser tracker. Namely, the capacitance displacement sensor is externally connected with a preamplifier 13, a signal conditioner and a PC14 and is matched with a laser tracker for use. The laser tracker is fixedly arranged at one end of the test sample section, provides absolute coordinates of the side face and the top face of the track at each measuring point position in the sample section, and can calculate the absolute offset of the jaw face by matching with the relative offset of the jaw face measured by the capacitance displacement sensor.
Specifically, as shown in fig. 14, for the coordinate relationship of a certain cross section corresponding to one point to be measured, X, Z are the lateral coordinate and the height coordinate at different positions of the left, right, upper and lower positions of the track, i is the width of the head of the track, θ is the inclination angle of the top surface of the track, and h is the inclination angle of the top surface of the track1、h2The data of the unevenness of the left and right jaw surfaces measured by the rail jaw surface test fixture of the invention respectively, w is the distance from the top to the plane of the sensor along the side surface of the rail head, the relationship among the measurement dimensions of the rail head is shown in the figure, and the coordinate X of the upper part of the left side is measured by a laser tracker1，Z1Coordinate X of the upper part of the right side2，Z2The coordinates of the rest parts are as X coordinate of left lower part3，Z3Coordinate X of lower right4，Z4It can be derived from the following formula:
Figure BDA0002854581260000081
X3＝X1+wsinθ+h1sin(15°-θ)；
Z3＝Z1-wcosθ+h1cos(15°-θ)；
X4＝X2+wsinθ-h2sin(15°+θ)；
Z4＝Z2-wcosθ+h2cos(15°+θ)。
in this embodiment, taking a 30-meter sample segment of a rocket sled orbit as an example, measuring points are arranged every 0.3 meter, and jaw surface unevenness measured by 202 points in total is shown in fig. 16. Wherein three peak values are all at the junction of track, and the peak value indicates that track thickness is less, has one section to be sunken because of the connection construction causes promptly the track bottom, can produce harmful effects to the motion of rocket sled.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims (10)

1. The rail jaw surface test fixture is characterized by comprising a sliding block (3), wherein a pressing block (5) is arranged at one end, attached to the top surface of a rail, of the sliding block (3), and when the sliding block (3) moves along the rail, the pressing block (5) is used for maintaining the attached state of the sliding block (3) and the side surface of the rail; one end of the sliding block (3) attached to the side face of the track is provided with a sensor support (1), a seat hole (12) for placing a sensor is formed in the sensor support (1), and the axial direction of the seat hole (12) is perpendicular to the jaw face of the track.
2. The clamp for testing the jaw surface of the rail as claimed in claim 1, wherein the slide block (3) is provided with a marking stop (4) for positioning a point to be tested, and the marking stop (4) is attached to the top surface of the rail.
3. A rail jaw test fixture as claimed in claim 1, characterised in that the contact surface of the slider (3) with the sensor mount (1) is parallel to the rail jaw.
4. The rail jaw surface test fixture as claimed in claim 1, wherein spring pressure devices are arranged in the pressing block (5), and are in contact with the side surface of the rail; the spring pressure device comprises an adjusting bolt (7), a spring (6), a spring guide rod (8) and a steel ball (9) contacted with the side face of the rail, which are sequentially connected, and a ball retaining sheet (10) used for preventing the steel ball (9) from falling is arranged on the pressing block (5).
5. The track jaw surface test fixture as claimed in claim 1, wherein the slide block (3) is an L-shaped slide block, and a tool withdrawal groove is formed at the inner corner of the L-shaped slide block.
6. The track jaw surface test fixture as claimed in claim 1, wherein the top of the sliding block (3) is provided with a mounting hole for fixing the signal modulation device; the seat hole (12) is provided with a gasket (2) for fixing the sensor.
7. A rail jaw face testing device, comprising: the track jaw face test fixture comprises a capacitive displacement sensor and the track jaw face test fixture as claimed in any one of claims 1-6, wherein the capacitive displacement sensor is installed in a seat hole (12) of the track jaw face test fixture.
8. Use of an orbital jaw testing fixture as claimed in any one of claims 1 to 6 in testing the unevenness of a rocket sled orbital jaw.
9. Use according to claim 8, characterized in that it comprises the following steps:
1) the method comprises the following steps of placing a sliding block (3) at a starting point to be detected of a rocket sled track, and connecting a sensor support (1), a marking stop block (4) and a pressing block (5) assembly with the sliding block (3) in sequence to enable the sliding block (3) to move on the rocket sled track in a fitting manner; the displacement sensor (11) is arranged in a seat hole (12) of the sensor support (1) and keeps the measuring end of the displacement sensor (11) parallel to the jaw surface of the rocket sled track;
2) and aligning the marking stop block (4) to a mark of a point to be measured of the rocket sled track for measurement, storing the measurement data of the point to be measured, moving the track jaw surface test fixture, and moving the displacement sensor (11) to the next point to be measured along the jaw surface of the rocket sled track for measurement and storing the measurement data.
10. Use according to claim 9, characterized in that the displacement sensor (11) is a capacitive displacement sensor externally connected to a preamplifier (13), a signal conditioner and a PC (14), the displacement sensor (11) being used in conjunction with a laser tracker.
CN202011541023.5A 2020-12-23 2020-12-23 Track jaw face test fixture and application and track jaw face test device based on same Pending CN112710226A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1370076A (en) * 1973-08-17 1974-10-09 Pudsey Eng Supply Co Ltd Appliance for checking the void between a railway rail and the ballast
JP2004163119A (en) * 2002-11-08 2004-06-10 East Japan Railway Co Rail abrasion ruler
CN203231740U (en) * 2013-03-12 2013-10-09 中南大学 Railway track abrasion detector
CN107560774A (en) * 2017-10-18 2018-01-09 郑州铁路局科学技术研究所 Portable elastic-strip pressure on-line measuring device
CN207127251U (en) * 2017-07-25 2018-03-23 新昌县七星街道云迪机械厂 A kind of clamping device
CN111271564A (en) * 2020-03-24 2020-06-12 四川西南交大铁路发展股份有限公司 Sensor fixing device for track detection

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1370076A (en) * 1973-08-17 1974-10-09 Pudsey Eng Supply Co Ltd Appliance for checking the void between a railway rail and the ballast
JP2004163119A (en) * 2002-11-08 2004-06-10 East Japan Railway Co Rail abrasion ruler
CN203231740U (en) * 2013-03-12 2013-10-09 中南大学 Railway track abrasion detector
CN207127251U (en) * 2017-07-25 2018-03-23 新昌县七星街道云迪机械厂 A kind of clamping device
CN107560774A (en) * 2017-10-18 2018-01-09 郑州铁路局科学技术研究所 Portable elastic-strip pressure on-line measuring device
CN111271564A (en) * 2020-03-24 2020-06-12 四川西南交大铁路发展股份有限公司 Sensor fixing device for track detection

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