Monitoring device and monitoring method for close attachment, crawling and head warping of switch rail

Abstract

The invention provides a device and a method for monitoring close attachment, creeping and head warping of a switch rail. The monitoring device comprises a linear displacement monitoring sensor and a target plate, the linear displacement monitoring sensor is installed on the stock rail, the target plate is installed on the side wall, facing the stock rail, of the switch rail, the target plate is provided with a working face, and the working face is provided with a datum point opposite to the end of the action rod; a plurality of monitoring grooves are evenly formed in the working face in the preset horizontal linear direction at intervals, and a plurality of monitoring protruding edges are evenly arranged in the preset vertical linear direction at intervals. The three common problems of close attachment, crawling and head warping of the switch rail can be accurately monitored in real time and sent to the background monitoring terminal in real time, and the problems of close attachment, crawling, head warping and the like of the railway turnout switch rail in the prior art are determined in a manual inspection and measurement mode; the problems of inaccurate measurement data, incapability of real-time monitoring, low working efficiency and high labor intensity exist in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of railway detection equipment, and in particular to a device and method for monitoring the close contact, creeping and warping of a pointed rail. Background Art

[0002] When a railway train is running or entering or leaving a station, it needs to switch to a different track. A switch is installed at the track switch, and the switch enables the train to change tracks by locking or separating the point rail and the base rail.

[0003] First, in an ideal state, when the turnout is locked, the cut surface of the point rail and the contact surface of the base rail are completely matched, and the point rail and the base rail fit together without generating pressure. However, in actual operation, the contact surface of the point rail and the base rail cannot be completely matched, and after the turnout has been working for a long time, the rails may be deformed due to the roadbed or other reasons, which may cause the point rail and the base rail to not fit closely after being locked, affecting the safety of the train's track change.

[0004] Secondly, in the actual working process, the point rail will creep along the length of the rail due to temperature changes; in addition, during the long-term operation of the train, the gap between the slide plate and the base rail is uneven or the root or tip of the point rail is low, resulting in uneven gap between the point rail and the base rail, which will cause the point rail to warp. The creeping and warping of the point rail will also seriously affect the safety of the train during the track change process.

[0005] In current technology, problems such as point rail sticking, creeping and warping are basically measured by manual patrol. First of all, this method is greatly affected by human factors during the measurement process, resulting in inaccurate measurements. In addition, manual patrol measurement cannot achieve real-time monitoring, and the data has a certain lag. In addition, due to the large number of railway switches, manual patrol measurement has low efficiency and high labor intensity. Summary of the invention

[0006] The main purpose of the present invention is to provide a device and method for monitoring the close contact, creeping and warping of the point rail, so as to at least solve the problems of the close contact, creeping and warping of the point rail of the railway turnout in the prior art, which are determined by manual inspection and measurement, resulting in inaccurate measurement data, inability to monitor in real time, low work efficiency and high labor intensity.

[0007] In order to achieve the above-mentioned purpose, the first aspect of the present invention provides a device for monitoring the close contact, creeping and warping of a pointed rail, comprising: a linear displacement monitoring sensor, which is installed on the base rail, and the linear displacement monitoring sensor has an action rod that can be telescopically moved along its axial direction, and the telescopic direction of the action rod is perpendicular to the side wall of the base rail; a target plate, which is installed on the side wall of the pointed rail facing the base rail, and the target plate has a working surface opposite to the base rail, and a reference point on the working surface is opposite to the end of the action rod; the working surface is evenly spaced along a preset horizontal straight line direction to form a plurality of monitoring grooves, and each monitoring groove extends in a vertical direction; the working surface is arranged ... A plurality of monitoring ridges are evenly spaced in the vertical straight direction, and each monitoring ridge extends in the horizontal direction; wherein the plurality of monitoring grooves include a plurality of first monitoring grooves and a plurality of second monitoring grooves, and the plurality of first monitoring grooves and the plurality of second monitoring grooves are respectively located on both sides of the reference point along the preset horizontal straight direction; the plurality of monitoring ridges include a plurality of first monitoring ridges and a plurality of second monitoring ridges, and the plurality of first monitoring ridges and the plurality of second monitoring ridges are respectively located on both sides of the reference point along the preset vertical straight direction; the first monitoring groove and the second monitoring groove have different depths, and the first monitoring ridge and the second monitoring ridge have different protrusion heights.

[0008] Furthermore, a first mounting hole is opened at the rail waist of the base rail along the width direction of the base rail, and the linear displacement monitoring sensor passes through the first mounting hole and is fixedly installed.

[0009] Furthermore, the target plate is a long strip plate structure, and a strip mounting groove extending along a preset horizontal straight line direction is provided on the side wall of the point rail facing the basic rail, and a second mounting hole is opened in the strip mounting groove along the width direction of the point rail; the target plate is arranged in the strip mounting groove and fixedly connected to the point rail through the second mounting hole.

[0010] Furthermore, both ends of each monitoring groove extend to be flush with the two outermost monitoring ridges; and both ends of each monitoring ridge extend to be flush with the two outermost monitoring grooves.

[0011] Furthermore, the distance between two adjacent monitoring grooves is 2 mm; the distance between two adjacent monitoring ridges is 2 mm.

[0012] Furthermore, the bottom surface of the monitoring groove is an inwardly concave arc-shaped transition surface along its width direction, and the top end of the monitoring ridge is an outwardly convex arc-shaped transition surface along its width direction.

[0013] Furthermore, the end of the action rod is a hemispherical structure.

[0014] According to a second aspect of the present invention, a method for monitoring the close fit, creeping and warping of a point rail is provided. The monitoring method uses any of the monitoring devices described above, and the monitoring method comprises: when the point rail is locked with the base rail, obtaining the actual displacement of an action rod compressed by the point rail by a linear displacement monitoring sensor; comparing the actual displacement with a reference displacement to determine whether the point rail is in close fit with the base rail; when the point rail is locked with the base rail, obtaining the number of times the action rod is respectively moved by a first monitoring groove, a second monitoring groove, a first monitoring ridge and a second monitoring ridge by a linear displacement monitoring sensor; calculating the creeping displacement of the point rail according to the number of times the action rod is respectively moved by the first monitoring groove and the second monitoring groove; calculating the warping displacement of the point rail according to the number of times the action rod is respectively moved by the first monitoring ridge and the second monitoring ridge.

[0015] The device for monitoring the close contact, creeping and warping of the pointed rail of the technical solution of the present invention comprises a linear displacement monitoring sensor and a target plate. The linear displacement monitoring sensor is installed on the basic rail. The linear displacement monitoring sensor has an action rod that telescopes along its axial direction, and the telescopic direction of the action rod is perpendicular to the side wall of the basic rail; the target plate is installed on the side wall of the pointed rail facing the basic rail, the target plate has a working surface opposite to the basic rail, and the working surface has a reference point opposite to the end of the action rod; the working surface is evenly spaced along a preset horizontal straight line direction to form a plurality of monitoring grooves, and each monitoring groove extends along a vertical direction; the working surface is arranged along a preset vertical straight line direction to form a plurality of monitoring grooves, and each monitoring groove extends ... A plurality of monitoring ridges are evenly spaced in the linear direction, and each monitoring ridge extends in the horizontal direction; wherein the plurality of monitoring grooves include a plurality of first monitoring grooves and a plurality of second monitoring grooves, and the plurality of first monitoring grooves and the plurality of second monitoring grooves are respectively located on both sides of the reference point along the preset horizontal straight line direction; the plurality of monitoring ridges include a plurality of first monitoring ridges and a plurality of second monitoring ridges, and the plurality of first monitoring ridges and the plurality of second monitoring ridges are respectively located on both sides of the reference point along the preset vertical straight line direction; the first monitoring groove and the second monitoring groove have different depths, and the first monitoring ridge and the second monitoring ridge have different protrusion heights. When the point rail moves toward the base rail for locking, the reference point on the target plate moves toward the action rod of the linear displacement monitoring sensor. When the point rail is locked with the base rail, the reference point on the target plate will contact with the end of the action rod and compress the action rod, thereby accurately obtaining the actual displacement of the point rail after contacting the action rod and sending it to the background monitoring terminal. By comparing the actual displacement with the standard displacement of close contact, it can be determined whether the point rail is close contact. When the point rail is in a locked state and creeps due to temperature changes, the target plate will move synchronously in the horizontal direction. When the point rail creeps forward, the end of the action rod of the linear displacement monitoring sensor will contact and pop out of multiple first monitoring grooves in sequence. When the point rail creeps backward, the end of the action rod will contact and pop out of multiple second monitoring grooves in sequence. Since the depths of the first monitoring groove and the second monitoring groove are different, the extension displacements of the action rod when passing through the first monitoring groove and the second monitoring groove are different. At the same time, the spacing between two adjacent monitoring grooves is equal and is a fixed value. The linear displacement monitoring sensor can determine whether the point rail crawls forward or backward and the actual crawling displacement by recording the number of pop-ups of the two different extension displacements of the action rod and sending it to the background monitoring terminal.When the pointed rail tilts up, the target plate will move synchronously in the vertical direction accordingly. When the pointed rail tilts up, the end of the action rod of the linear displacement monitoring sensor will contact and be compressed with multiple first monitoring ridges in sequence. When the pointed rail tilts down, the end of the action rod will contact and be compressed with multiple second monitoring ridges in sequence. The monitoring ridges and the monitoring grooves cause the action rod to pop out and compress, thereby distinguishing crawling from tilting. Since the first monitoring ridge and the second monitoring ridge have different protrusion heights, the compression displacement of the action rod when passing through the first monitoring ridge and the second monitoring ridge is also different. At the same time, the spacing between two adjacent monitoring ridges is equal and is a fixed value. The linear displacement monitoring sensor can determine whether the pointed rail tilts up or down and the actual tilt displacement by recording the number of two different compression displacements of the action rod and sending them to the background monitoring terminal. The present invention combines a linear displacement monitoring sensor with a target plate to accurately and in real time monitor three common problems of point rail sticking, creeping and warping, and sends the results to a background monitoring terminal in real time, thereby solving the problem that problems of point rail sticking, creeping and warping of railway turnouts are determined by manual inspection and measurement in the prior art, resulting in inaccurate measurement data, inability to monitor in real time, low work efficiency and high labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 It is a schematic diagram of the installation structure of a switch rail close contact, creeping and tilting monitoring device which can be selected according to an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 3 It is a schematic diagram of the positions of a linear displacement monitoring sensor and a target plate of a pointed rail close contact, creeping and warping monitoring device which can be selected according to an embodiment of the present invention;

[0020] Figure 4 It is a schematic structural diagram of a target plate of a switch rail close-fitting, creeping and warping monitoring device which can be selected according to an embodiment of the present invention;

[0021] Figure 5 It is a schematic diagram of the installation structure of a target plate of a switch rail close contact, creeping and warping monitoring device which can be selected according to an embodiment of the present invention;

[0022] Figure 6 yes Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 7 It is a flow chart of a method for monitoring the close contact, creeping and warping of a pointed rail which can be selected according to an embodiment of the present invention.

[0024] The above drawings include the following reference numerals:

[0025] 10. Linear displacement monitoring sensor; 11. Actuating rod; 12. Adjusting bolt; 20. Target plate; 21. Monitoring groove; 211. First monitoring groove; 212. Second monitoring groove; 22. Monitoring ridge; 221. First monitoring ridge; 222. Second monitoring ridge; 30. Basic rail; 40. Point rail; 41. Strip mounting groove. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present 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.

[0027] The device for monitoring the close contact, creeping and tilting of the pointed rail according to the technical solution of the present invention is as follows: Figures 1 to 4As shown, it includes a linear displacement monitoring sensor 10 and a target plate 20. The linear displacement monitoring sensor 10 is installed on the basic rail 30. The linear displacement monitoring sensor 10 has an action rod 11 that can telescope along its axial direction, and the telescopic direction of the action rod 11 is perpendicular to the side wall of the basic rail 30; the target plate 20 is installed on the side wall of the pointed rail 40 facing the basic rail 30, and the target plate 20 has a working surface opposite to the basic rail 30, and the working surface has a reference point opposite to the end of the action rod 11; the working surface is evenly spaced along a preset horizontal straight line direction. A plurality of monitoring grooves 21 are evenly spaced, and each monitoring groove 21 extends in the vertical direction; the working surface is evenly spaced along a preset vertical straight line direction. 22, each monitoring ridge 22 extends in the horizontal direction; wherein, the plurality of monitoring grooves 21 include a plurality of first monitoring grooves 211 and a plurality of second monitoring grooves 212, and the plurality of first monitoring grooves 211 and the plurality of second monitoring grooves 212 are respectively located on both sides of the reference point along the preset horizontal straight line direction; the plurality of monitoring ridges 22 include a plurality of first monitoring ridges 221 and a plurality of second monitoring ridges 222, and the plurality of first monitoring ridges 221 and the plurality of second monitoring ridges 222 are respectively located on both sides of the reference point along the preset vertical straight line direction; the first monitoring groove 211 and the second monitoring groove 212 have different depths, and the first monitoring ridge 221 and the second monitoring ridge 222 have different protrusion heights. When the pointed rail 40 moves toward the base rail 30 to be locked, the reference point on the target plate 20 moves toward the actuating rod 11 of the linear displacement monitoring sensor 10. When the pointed rail 40 is locked with the base rail 30, the reference point on the target plate 20 will contact the end of the actuating rod 11 and compress the actuating rod 11, thereby accurately obtaining the actual displacement of the pointed rail 40 after contacting the actuating rod 11 and sending it to the background monitoring terminal. By comparing the actual displacement with the standard displacement of close contact, it can be determined whether the pointed rail 40 is close contact. When the pointed rail 40 crawls due to temperature changes in the locked state, the target plate 20 will move synchronously in the horizontal direction. When the pointed rail 40 crawls forward, the end of the action rod 11 of the linear displacement monitoring sensor 10 will contact and pop out of multiple first monitoring grooves 211 in sequence. When the pointed rail 40 crawls backward, the end of the action rod 11 will contact and pop out of multiple second monitoring grooves 212 in sequence. Since the first monitoring groove 211 and the second monitoring groove 212 have different depths, the extension displacement of the action rod 11 when passing through the first monitoring groove 211 and the second monitoring groove 212 is different. Whether the pointed rail 40 crawls forward or backward is determined by the different extension displacements of the action rod 11; at the same time, the spacing between two adjacent monitoring grooves 21 is equal and is a fixed value. The linear displacement monitoring sensor 10 can determine the actual displacement of the pointed rail 40 crawling forward or backward by recording the number of pop-ups of the two different extension displacements of the action rod 11 and sending it to the background monitoring terminal.When the pointed rail 40 tilts up, the target plate 20 will move synchronously in the vertical direction accordingly. When the pointed rail 40 tilts up, the end of the action rod 11 of the linear displacement monitoring sensor 10 will contact and be compressed with multiple first monitoring ridges 221 in sequence. When the pointed rail 40 tilts down, the end of the action rod 11 will contact and be compressed with multiple second monitoring ridges 222 in sequence. The monitoring ridges 22 and the monitoring grooves 21 cause the action rod 11 to produce a pop-up action or a compression action, thereby distinguishing crawling from tilting. Since the first monitoring ridge 221 and the second monitoring ridge 222 have different protrusion heights, the compression displacement of the action rod 11 when passing through the first monitoring ridge 221 and the second monitoring ridge 222 is also different, thereby distinguishing between tilting up and tilting down. At the same time, the spacing between two adjacent monitoring ridges 22 is equal and is a fixed value. The linear displacement monitoring sensor 10 can determine the actual tilting displacement of the pointed rail 40 tilting up or tilting down by recording the number of two different compression displacements of the action rod 11 and sending it to the background monitoring terminal. The present invention can accurately and real-timely monitor the three common problems of close fitting, creeping and warping of the point rail 40 by matching the linear displacement monitoring sensor 10 and the target plate 20, and send them to the background monitoring terminal in real time, thereby solving the problems of close fitting, creeping and warping of the point rail 40 of the railway turnout in the prior art by manual inspection and measurement, resulting in inaccurate measurement data, inability to monitor in real time, low work efficiency and high labor intensity.

[0028] In specific implementation, the linear displacement monitoring sensor 10 is a pen-type high-precision displacement sensor, and its action rod 11 can accurately sense the displacement when the point rail 40 is locked, so as to determine whether it is tightly fitted; at the same time, the action rod 11 can also accurately sense the different extension or compression displacements when in contact with the first monitoring groove 211, the second monitoring groove 212, the first monitoring ridge 221 and the second monitoring ridge 222, so as to accurately distinguish forward crawling, backward crawling, upward tilting and downward tilting, and count them respectively, so as to realize the monitoring of the specific displacement of crawling or tilting.

[0029] A first mounting hole is provided at the waist of the basic rail 30 along the width direction of the basic rail 30, and the linear displacement monitoring sensor 10 passes through the first mounting hole and is fixedly installed. The action rod 11 of the linear displacement monitoring sensor 10 is on the inner side of the basic rail 30 and extends toward the point rail 40 by a preset distance. The distance needs to ensure that when the point rail 40 is in close contact with the basic rail 30, the action rod 11 can be pressed down by a preset displacement amount, and the preset position amount is used as the standard displacement amount of close contact; during actual installation, the installation spacing between the action rod 11 and the point rail 40 needs to be adjusted and calibrated. Optionally, an adjustment bolt 12 is provided on the linear displacement monitoring sensor 10, and the adjustment bolt 12 can adjust the specific installation position of the linear displacement monitoring sensor 10 in the first mounting hole, thereby adjusting the installation spacing between the action rod 11 and the point rail 40; the rear end of the linear displacement monitoring sensor 10 extends to the outside of the basic rail 30 and is connected to the background monitoring terminal by wire or wireless signal module to send data. When the point rail 40 fails to fit closely with the base rail 30 during operation, the actual displacement of the action rod 11 will be less than the standard displacement, thereby determining that the point rail 40 is not in close contact, and the difference between the standard displacement and the actual displacement can be used to obtain the actual gap between the point rail 40 and the base rail 30 when they are not in close contact. When the point rail 40 is in a locked state and creeps or tilts, the ejection or compression actions of the action rod 11 with different displacements along the front-to-back direction and the vertical direction of the target plate 20 are counted based on the standard displacement after close contact, so as to monitor creep and tilt.

[0030] Furthermore, if Figure 5 and Figure 6 As shown, the target plate 20 is a long strip plate structure, and the side wall of the point rail 40 facing the basic rail 30 is provided with a strip mounting groove 41 extending along a preset horizontal straight line direction, and a plurality of through second mounting holes are opened in the strip mounting groove 41 along the width direction of the point rail 40; the target plate 20 is arranged in the strip mounting groove and fixedly connected to the point rail 40 by bolts and the second mounting holes to ensure that the working surface of the target plate 20 and the actuating rod 11 maintain a vertical relative state, thereby ensuring the accuracy of the telescopic movement displacement of the actuating rod 11.

[0031] The crawling and tilting movements of the pointed rail 40 are often carried out simultaneously. Therefore, the linear displacement monitoring sensor 10 needs to ensure that it can simultaneously record the number of movements of the action rod 11 during the movement of the target plate 20 along the preset horizontal straight line direction and along the preset vertical straight line direction. Further, the two ends of each monitoring groove 21 extend to be flush with the two outermost monitoring ridges 22; the two ends of each monitoring ridge 22 extend to be flush with the two outermost monitoring grooves 21; that is, multiple monitoring grooves 21 and multiple monitoring ridges 22 intersect each other perpendicularly to form a rectangular detection area. When the pointed rail 40 crawls and tilts, the action rod 11 counts the contacted monitoring grooves 21 and monitoring ridges 22 respectively, ensuring that the crawling and tilting data can be effectively recorded.

[0032] Furthermore, the spacing between two adjacent monitoring grooves 21 is 2mm; the spacing between two adjacent monitoring ridges 22 is 2mm. The maximum monitoring thresholds for forward creeping, backward creeping, upward tilting, and downward tilting are 20mm, that is, when forward creeping, backward creeping, upward tilting, and downward tilting reach 20mm, it has seriously affected the operation safety of the train, and an alarm must be issued through the background monitoring terminal to remind the staff to perform maintenance. Therefore, there are ten first monitoring grooves 211 and ten second monitoring grooves 212, and ten first monitoring ridges 221 and ten second monitoring ridges 222; the specific numbers of the first monitoring grooves 211, the second monitoring grooves 212, the first monitoring ridges 221, and the second monitoring ridges 222 can be increased or decreased according to actual application requirements.

[0033] During actual operation, the forward and backward creeping of the pointed rail 40 will be repeated and repeated over a period of time as the temperature changes, and the actual creeping displacement is the difference between the two. For example, if it crawls 10mm forward and 6mm backward, the actual creeping situation is 4mm forward. For example, if it crawls 16mm forward and 24mm backward, the actual creeping situation is 8mm backward. Only when the reference point is used as the starting point of the crawling and the one-way creeping exceeds 20mm, an alarm is issued, thereby effectively avoiding false alarms. Alternatively, another recording method is used. During actual operation, when there is reciprocating creeping, the creeping displacement is reset to zero each time the reference point is passed. Only when the one-way creeping exceeds 20mm forward or backward, an alarm is issued. The tilting head is generally a one-way displacement, and an alarm is issued only when the upward tilting head or the downward tilting head exceeds 20mm.

[0034] In order to ensure that the action rod 11 can smoothly pass through each monitoring groove 21 and each monitoring ridge 22 during the crawling and tilting monitoring process, further, the bottom surface of each monitoring groove 21 is an inwardly concave arc transition surface along its width direction, and the top of each monitoring ridge 22 is an outwardly convex arc transition surface along its width direction. In addition, the end of the action rod 11 is a hemispherical structure. This can effectively reduce the obstruction during the relative movement between the end of the action rod 11 and each monitoring groove 21 and each monitoring ridge 22, and avoid the monitoring groove 21 or the monitoring ridge 22 from jamming the action rod 11.

[0035] The second embodiment of the present invention provides a method for monitoring the close contact, creeping and tilting of the pointed rail. The monitoring method uses the monitoring device of the above embodiment, such as Figure 7 As shown, the monitoring method comprises the following steps:

[0036] S102: When the point rail 40 and the base rail 30 are locked, the actual displacement of the action rod 11 compressed by the point rail 40 is obtained by the linear displacement monitoring sensor 10; the actual displacement is compared with the reference displacement to determine whether the point rail 40 and the base rail 30 are in close contact;

[0037] S104: When the point rail 40 and the base rail 30 are locked, the number of times the actuating rod 11 is moved by the first monitoring groove 211 , the second monitoring groove 212 , the first monitoring ridge 221 , and the second monitoring ridge 222 is acquired through the linear displacement monitoring sensor 10 ;

[0038] S106: The creep displacement of the point rail 40 is calculated based on the number of times the action rod 11 is respectively moved by the first monitoring groove 211 and the second monitoring groove 212; the tilting displacement of the point rail 40 is calculated based on the number of times the action rod 11 is respectively moved by the first monitoring ridge 221 and the second monitoring ridge 222.

[0039] When the pointed rail 40 moves toward the base rail 30 to be locked, the reference point on the target plate 20 moves toward the actuating rod 11 of the linear displacement monitoring sensor 10. When the pointed rail 40 is locked with the base rail 30, the reference point on the target plate 20 will contact the end of the actuating rod 11 and compress the actuating rod 11, thereby accurately obtaining the actual displacement of the pointed rail 40 after contacting the actuating rod 11 and sending it to the background monitoring terminal. By comparing the actual displacement with the standard displacement of close contact, it can be determined whether the pointed rail 40 is close contact. When the pointed rail 40 crawls due to temperature changes in the locked state, the target plate 20 will move synchronously in the horizontal direction. When the pointed rail 40 crawls forward, the end of the action rod 11 of the linear displacement monitoring sensor 10 will contact and pop out of multiple first monitoring grooves 211 in sequence. When the pointed rail 40 crawls backward, the end of the action rod 11 will contact and pop out of multiple second monitoring grooves 212 in sequence. Since the first monitoring groove 211 and the second monitoring groove 212 have different depths, the extension displacement of the action rod 11 when passing through the first monitoring groove 211 and the second monitoring groove 212 is different. Whether the pointed rail 40 crawls forward or backward is determined by the different extension displacements of the action rod 11; at the same time, the spacing between two adjacent monitoring grooves 21 is equal and is a fixed value. The linear displacement monitoring sensor 10 can determine the actual displacement of the pointed rail 40 crawling forward or backward by recording the number of pop-ups of the two different extension displacements of the action rod 11 and sending it to the background monitoring terminal. When the pointed rail 40 tilts up, the target plate 20 will move synchronously in the vertical direction accordingly. When the pointed rail 40 tilts up, the end of the action rod 11 of the linear displacement monitoring sensor 10 will contact and be compressed with multiple first monitoring ridges 221 in sequence. When the pointed rail 40 tilts down, the end of the action rod 11 will contact and be compressed with multiple second monitoring ridges 222 in sequence. The monitoring ridges 22 and the monitoring grooves 21 cause the action rod 11 to produce a pop-up action or a compression action, thereby distinguishing crawling from tilting. Since the first monitoring ridge 221 and the second monitoring ridge 222 have different protrusion heights, the compression displacement of the action rod 11 when passing through the first monitoring ridge 221 and the second monitoring ridge 222 is also different, thereby distinguishing between tilting up and tilting down. At the same time, the spacing between two adjacent monitoring ridges 22 is equal and is a fixed value. The linear displacement monitoring sensor 10 can determine the actual tilting displacement of the pointed rail 40 tilting up or tilting down by recording the number of two different compression displacements of the action rod 11 and sending it to the background monitoring terminal. The present invention can accurately and real-timely monitor the three common problems of close fitting, creeping and warping of the point rail 40 by matching the linear displacement monitoring sensor 10 and the target plate 20, and send them to the background monitoring terminal in real time, thereby solving the problems of close fitting, creeping and warping of the point rail 40 of the railway turnout in the prior art by manual inspection and measurement, resulting in inaccurate measurement data, inability to monitor in real time, low work efficiency and high labor intensity.

[0040] During actual operation, the forward and backward creeping of the pointed rail 40 will be repeated and repeated over a period of time as the temperature changes, and the actual creeping displacement is the difference between the two. For example, if it crawls 10mm forward and 6mm backward, the actual creeping situation is 4mm forward. For example, if it crawls 16mm forward and 24mm backward, the actual creeping situation is 8mm backward. Only when the reference point is used as the starting point of the crawling and the one-way creeping exceeds 20mm, an alarm is issued, thereby effectively avoiding false alarms. Alternatively, another recording method is used. During actual operation, when there is reciprocating creeping, the creeping displacement is reset to zero each time the reference point is passed. Only when the one-way creeping exceeds 20mm forward or backward, an alarm is issued. The tilting head is generally a one-way displacement, and an alarm is issued only when the upward tilting head or the downward tilting head exceeds 20mm.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for monitoring the close contact, creeping and tilting of a pointed rail, characterized in that: include: A linear displacement monitoring sensor (10) is installed on a base rail (30), wherein the linear displacement monitoring sensor (10) has an action rod (11) that can telescope along its axial direction, and the telescopic direction of the action rod (11) is perpendicular to the side wall of the base rail (30); A target plate (20) is mounted on a side wall of a pointed rail (40) facing the basic rail (30), the target plate (20) having a working surface opposite to the basic rail (30), the working surface having a reference point opposite to the end of the action rod (11); the working surface is provided with a plurality of monitoring grooves (21) evenly spaced along a preset horizontal straight line direction, each of the monitoring grooves (21) extending in a vertical direction; the working surface is provided with a plurality of monitoring ridges (22) evenly spaced along a preset vertical straight line direction, each of the monitoring ridges (22) extending in a horizontal direction; The plurality of monitoring grooves (21) include a plurality of first monitoring grooves (211) and a plurality of second monitoring grooves (212), and the plurality of first monitoring grooves (211) and the plurality of second monitoring grooves (212) are respectively located on both sides of the reference point along the preset horizontal straight line direction; the plurality of monitoring ridges (22) include a plurality of first monitoring ridges (221) and a plurality of second monitoring ridges (222), and the plurality of first monitoring ridges (221) and the plurality of second monitoring ridges (222) are respectively located on both sides of the reference point along the preset vertical straight line direction; the first monitoring groove (211) and the second monitoring groove (212) have different depths, and the first monitoring ridge (221) and the second monitoring ridge (222) have different protrusion heights.

2. The device for monitoring the close contact, creeping and tilting of the pointed rail according to claim 1, characterized in that: A first mounting hole is provided at the rail waist of the base rail (30) along the width direction of the base rail (30), and the linear displacement monitoring sensor (10) passes through the first mounting hole and is fixedly mounted.

3. The device for monitoring the close contact, creeping and tilting of the pointed rail according to claim 1, characterized in that: The target plate (20) is a long strip plate structure; the side wall of the point rail (40) facing the base rail (30) is provided with a strip mounting groove (41) extending along the preset horizontal straight line direction; a second mounting hole is opened in the strip mounting groove (41) along the width direction of the point rail (40); the target plate (20) is arranged in the strip mounting groove and fixedly connected to the point rail (40) through the second mounting hole.

4. The device for monitoring the close contact, creeping and tilting of the pointed rail according to claim 1, characterized in that: Both ends of each monitoring groove (21) extend to be flush with the two outermost monitoring ridges (22); and both ends of each monitoring ridge (22) extend to be flush with the two outermost monitoring grooves (21).

5. The device for monitoring the close contact, creeping and tilting of the pointed rail according to claim 1, characterized in that: The distance between two adjacent monitoring grooves (21) is 2 mm; the distance between two adjacent monitoring ridges (22) is 2 mm.

6. The device for monitoring the close contact, creeping and tilting of the pointed rail according to claim 1, characterized in that: The bottom surface of the monitoring groove (21) is an inwardly concave arc-shaped transition surface along its width direction, and the top end of the monitoring ridge (22) is an outwardly convex arc-shaped transition surface along its width direction.

7. The device for monitoring the close contact, creeping and tilting of the pointed rail according to claim 1, characterized in that: The end of the action rod (11) is a hemispherical structure.

8. A method for monitoring the close contact, creeping and tilting of a pointed rail, characterized in that: The monitoring method uses the monitoring device described in any one of claims 1 to 7, and the monitoring method includes: When the point rail (40) and the base rail (30) are locked, the actual displacement of the action rod (11) compressed by the point rail (40) is obtained through the linear displacement monitoring sensor (10); Comparing the actual displacement with the reference displacement to determine whether the pointed rail (40) and the base rail (30) are in close contact; When the pointed rail (40) and the base rail (30) are locked, the number of times the action rod (11) is moved by the first monitoring groove (211), the second monitoring groove (212), the first monitoring ridge (221), and the second monitoring ridge (222) is acquired through the linear displacement monitoring sensor (10); The creep displacement of the pointed rail (40) is calculated according to the number of times the action rod (11) is moved by the first monitoring groove (211) and the second monitoring groove (212); The tilt displacement of the pointed rail (40) is calculated based on the number of times the action rod (11) is respectively moved by the first monitoring ridge (221) and the second monitoring ridge (222).

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