Monitoring device for close attachment, creeping and head warping of switch rail

Abstract

The utility model provides a device for monitoring close attachment, creeping and head warping of a switch rail. Comprising a linear displacement monitoring sensor, a target plate and a background monitoring terminal, the linear displacement monitoring sensor is installed on a stock rail, the target plate is installed on a switch rail, and a working face of the target plate is provided with a reference point; a plurality of monitoring grooves and a plurality of monitoring ribs are uniformly arranged on the working surface at intervals, and the background monitoring terminal is connected with the linear displacement monitoring sensor in a wired communication mode or a wireless communication mode; according to the utility model, the linear displacement monitoring sensor is matched with the target plate, so that three common problems of close attachment, creeping and head warping of the switch rail can be accurately monitored in real time and sent to the background monitoring terminal in real time; the problems that in the prior art, the problems of close attachment, creeping, head warping and the like of the railway turnout switch rail are determined in a manual inspection and measurement mode, measurement data are inaccurate, real-time monitoring cannot be achieved, the working efficiency is low, and the labor intensity is large are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to railway detection equipment field, specifically, a point rail close, crawl, head lifting monitoring device. BACKGROUND

[0002] Railway train needs to convert to different tracks to run in the running process and when entering or leaving the station, and the track conversion is provided with a turnout, and the turnout realizes train track change through the locking or separation of the point rail and the basic rail.

[0003] Firstly, in the ideal state, the section of the point rail and the close surface of the basic rail are completely matched when the turnout is locked, and the point rail and the basic rail are just close but do not produce pressure. However, in the actual operation process, the close surface of the point rail and the basic rail cannot be completely matched, and the turnout will deform due to the subgrade or other reasons after working for a long time, so that the point rail and the basic rail cannot be close after locking, which affects the safety of train track change.

[0004] Secondly, the point rail will crawl along the length of the rail due to temperature change in the actual working process, and the gap between the slide bed plate and the basic rail is uneven or the root or tip of the point rail is low, which causes the gap between the point rail and the basic rail to be uneven, thereby causing the point rail to lift the head. The crawling and head lifting of the point rail will also seriously affect the safety of train track change.

[0005] In the prior art, the point rail close, crawling and head lifting problems are basically determined by manual inspection, which is first affected by human factors in the measurement process, and the measurement is inaccurate. In addition, manual inspection cannot realize real-time monitoring, the data has a certain lag, and the number of railway turnouts is large, so the work efficiency of manual inspection is low and the labor intensity is large. UTILITY MODEL CONTENTS

[0006] The main purpose of the utility model is to provide a point rail close, crawling and head lifting monitoring device to at least solve the problems in the prior art that the point rail close, crawling and head lifting of the railway turnout are determined by manual inspection, the measurement data is inaccurate, real-time monitoring is not realized, and the work efficiency is low and the labor intensity is large.

[0007] In order to achieve the above-mentioned purpose, the utility model 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 provided with a plurality of monitoring grooves evenly spaced along a preset horizontal straight line direction, and each monitoring groove extends in a vertical direction; the working surface is provided with a plurality of monitoring ridges evenly spaced along a preset vertical straight line direction, and each monitoring ridge is extended in a vertical direction; The plurality of monitoring ridges extend in the horizontal direction; the background monitoring terminal is connected to the linear displacement monitoring sensor through a wired communication method or a wireless communication method; 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.

[0008] Furthermore, a first mounting hole is opened at the waist of the stock rail along the width direction of the stock 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] The utility model discloses a point rail close, crawl, head monitoring device, including linear displacement monitoring sensor, target plate and backstage monitoring terminal, linear displacement monitoring sensor installs on the basic rail, and linear displacement monitoring sensor has the action lever that stretches out and contracts along its axial direction, and the telescopic direction of action lever is perpendicular to the side wall of basic rail, target plate installs on the side wall of basic rail towards basic rail, and target plate has the working face opposite basic rail, and the working face has the reference point opposite the end of action lever, the working face is evenly spaced apart and is provided with a plurality of monitoring grooves along the preset horizontal straight line direction, and each monitoring groove extends along the vertical direction, the working face is evenly spaced apart and is provided with a plurality of monitoring convex edges along the preset vertical straight line direction, and each monitoring convex edge extends along the horizontal direction, and the backstage monitoring terminal is connected with linear displacement monitoring sensor through wired communication mode or wireless communication mode, 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 located on the two sides of reference point along the preset horizontal straight line direction respectively, the plurality of monitoring convex edges include a plurality of first monitoring convex edges and a plurality of second monitoring convex edges, and the plurality of first monitoring convex edges and the plurality of second monitoring convex edges are located on the two sides of reference point along the preset vertical straight line direction respectively, the depth of first monitoring groove and second monitoring groove is different, and the projection height of first monitoring convex edge and second monitoring convex edge is different, when the movement of basic rail towards basic rail is locked, the reference point on target plate moves towards the action lever of linear displacement monitoring sensor, when basic rail is locked, the reference point on target plate will contact the end of action lever and compresses action lever, thereby accurately obtaining the actual displacement amount of the action lever after the contact of basic rail and sending to backstage monitoring terminal, and whether basic rail is close can be determined by comparing the actual displacement amount with the standard displacement amount of close. When crawling due to temperature change under the locked state of basic rail, target plate will move along the horizontal direction simultaneously, when basic rail crawls forward, will make the end of action lever of linear displacement monitoring sensor contact a plurality of first monitoring grooves in turn and pop out, when basic rail crawls backward, will make the end of action lever contact a plurality of second monitoring grooves in turn and pop out, because the depth of first monitoring groove and second monitoring groove is different, so the extension displacement of action lever when passing through first monitoring groove and second monitoring groove is different, the interval between two adjacent monitoring grooves is equal and is a determined value, and linear displacement monitoring sensor sends to backstage monitoring terminal by recording the pop-out frequency of two different extension displacements of action lever, whether basic rail crawls forward or backward and the actual crawling displacement can be determined.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 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 tilting displacement by recording the number of two different compression displacements of the action rod and sending it to the background monitoring terminal. The utility model combines a linear displacement monitoring sensor with a target plate, and can accurately and in real time monitor three common problems of the switch rail, namely, tight adhesion, creeping and warping, and send the results to the background monitoring terminal in real time. This solves the problems in the prior art of using manual inspection and measurement to determine the problems of railway switch rail tight adhesion, creeping and warping, which result in inaccurate measurement data, inability to monitor in real time, low work efficiency and high labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 1 This is a schematic diagram of the installation structure of a switch rail close contact, creeping, and tilting monitoring device according to an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0018] Figure 3 This is a schematic diagram of the positions of the linear displacement monitoring sensor and the target plate of a switch rail close contact, creeping, and warping monitoring device according to an embodiment of the present utility model;

[0019] Figure 4 This is a schematic structural diagram of a target plate of a switch rail close contact, creeping, and warping monitoring device according to an embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of the installation structure of a target plate of a switch rail close contact, creeping, and warping monitoring device according to an embodiment of the present utility model;

[0021] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure at point A in the middle.

[0022] Wherein, the above-mentioned drawings include the following reference signs:

[0023] 10, straight displacement monitoring sensor; 11, action lever; 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, pointed rail; 41, strip-shaped mounting groove; 50, background monitoring terminal. DETAILED DESCRIPTION

[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0025] The pointed rail closely adhering, crawling and head lifting monitoring device of the technical scheme of the present application is like Figures 1 to 4As shown, the system comprises a linear displacement monitoring sensor 10, a target plate 20 and a background monitoring terminal 50, the linear displacement monitoring sensor 10 is installed on the basic rail 30, the linear displacement monitoring sensor 10 has an action rod 11 which can stretch and contract along the axial direction, the stretching and contracting 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 frog 40 which faces the basic rail 30, the target plate 20 has a working surface which is opposite to the basic rail 30, the working surface has a reference point which is opposite to the end of the action rod 11; the working surface is uniformly spaced apart in the preset horizontal linear direction and is provided with a plurality of monitoring grooves 21, each monitoring groove 21 extends along the vertical direction; the working surface is uniformly spaced apart in the preset vertical linear direction and is provided with a plurality of monitoring ribs 22, each monitoring rib 22 extends along the horizontal direction; the background monitoring terminal 50 is connected with the linear displacement monitoring sensor through wired communication mode or wireless communication mode; wherein the plurality of monitoring grooves 21 comprises a plurality of first monitoring grooves 211 and a plurality of second monitoring grooves 212, the plurality of first monitoring grooves 211 and the plurality of second monitoring grooves 212 are respectively located on the two sides of the reference point along the preset horizontal linear direction; the plurality of monitoring ribs 22 comprises a plurality of first monitoring ribs 221 and a plurality of second monitoring ribs 222, the plurality of first monitoring ribs 221 and the plurality of second monitoring ribs 222 are respectively located on the two sides of the reference point along the preset vertical linear direction; the first monitoring groove 211 and the second monitoring groove 212 are different in depth, the first monitoring rib 221 and the second monitoring rib 222 are different in protruding height. When the frog 40 moves towards the basic rail 30 to lock, the reference point on the target plate 20 moves towards the action rod 11 of the linear displacement monitoring sensor 10, when the frog 40 is locked with the basic rail 30, the reference point on the target plate 20 will contact the end of the action rod 11 and compress the action rod 11, so as to accurately obtain the actual displacement amount of the frog 40 after contacting the action rod 11 and send it to the background monitoring terminal 50, by comparing the actual displacement amount with the standard displacement amount, whether the frog 40 is close can be determined. When the frog 40 crawls due to temperature change in the locked state, the target plate 20 will move along the horizontal direction synchronously, when the frog 40 crawls forward, the end of the action rod 11 of the linear displacement monitoring sensor 10 will successively contact a plurality of first monitoring grooves 211 and pop out, when the frog 40 crawls backward, the end of the action rod 11 will successively contact a plurality of second monitoring grooves 212 and pop out, because the first monitoring groove 211 and the second monitoring groove 212 are different in depth, the stretching displacement of the action rod 11 when passing through the first monitoring groove 211 and the second monitoring groove 212 is different, by the different stretching displacement of the action rod 11, whether the frog 40 crawls forward or backward can be determined; meanwhile, the interval between the adjacent two monitoring grooves 21 is equal and is a certain value, the linear displacement monitoring sensor 10 records the pop-out times of the two different stretching displacements of the action rod 11 and sends them to the background monitoring terminal 50, so as to determine the actual displacement of the frog 40 which crawls forward or backward.When the point rail 40 appears to be tilted, the target plate 20 will move synchronously in the vertical direction, and when the point rail 40 is tilted upwards, the end of the action rod 11 of the linear displacement monitoring sensor 10 will be in contact with and compressed by the plurality of first monitoring convex edges 221 in turn, and when the point rail 40 is tilted downwards, the end of the action rod 11 will be in contact with and compressed by the plurality of second monitoring convex edges 222 in turn, the monitoring convex edges 22 and the monitoring grooves 21 enable the action rod 11 to produce a pop-up action or a compression action, thereby distinguishing between creeping and tilting, and because the first monitoring convex edges 221 and the second monitoring convex edges 222 have different convex heights, the compression displacement of the action rod 11 when passing through the first monitoring convex edges 221 and the second monitoring convex edges 222 is also different, thereby distinguishing between upward tilting and downward tilting, and the spacing between the adjacent two monitoring convex edges 22 is equal and has a determined value, and the linear displacement monitoring sensor 10 can determine the actual tilting displacement of the point rail 40 by recording the number of times of two different compression displacements of the action rod 11 and sending it to the background monitoring terminal 50 when the point rail 40 is tilted upwards or downwards. The linear displacement monitoring sensor 10 and the target plate 20 are matched, which can accurately and timely monitor the three common problems of the point rail 40, i.e., close contact, creeping and tilting, and send them to the background monitoring terminal 50 in real time, thereby solving the problems in the prior art, i.e., the close contact, creeping and tilting of the point rail 40 are determined by manual patrol measurement, which has the problems of inaccurate measurement data, inability to monitor in real time, low work efficiency and high labor intensity.

[0026] In specific implementation, the linear displacement monitoring sensor 10 is a pen-type high-precision displacement sensor, the action rod 11 of which can accurately perceive the displacement amount of the point rail 40 when it is locked, thereby judging whether it is close contact; at the same time, the action rod 11 can also accurately perceive the different extension or compression displacement amounts when it is in contact with the first monitoring groove 211, the second monitoring groove 212, the first monitoring convex edge 221 and the second monitoring convex edge 222, thereby accurately distinguishing between forward creeping, backward creeping, upward tilting and downward tilting, and counting them respectively, so as to realize the monitoring of the specific displacement amount of creeping or tilting.

[0027] The first mounting hole is provided through the rail web of the base rail 30 along the width direction of the base rail 30, the linear displacement monitoring sensor 10 passes through the first mounting hole and is fixedly mounted, the action rod 11 of the linear displacement monitoring sensor 10 extends a preset distance on the inner side of the base rail 30 and towards the point rail 40, the distance needs to ensure that when the point rail 40 is closely attached to the base rail 30, the action rod 11 can be pressed down by a preset displacement amount, and the preset displacement amount is taken as a standard displacement amount of close attachment; in actual installation, the installation spacing of the action rod 11 and the point rail 40 needs to be adjusted and calibrated, optionally, the linear displacement monitoring sensor 10 is provided with an adjusting bolt 12, the adjusting bolt 12 can adjust the specific mounting position of the linear displacement monitoring sensor 10 in the first mounting hole, so as to adjust the installation spacing of the action rod 11 and the point rail 40; the rear end of the linear displacement monitoring sensor 10 extends to the outer side of the base rail 30 and is connected with the background monitoring terminal 50 in a wired mode or a wireless signal mode to send data. When the point rail 40 cannot be closely attached to the base rail 30 during operation, the actual displacement amount of the action rod 11 will be less than the standard displacement amount, so as to determine that the point rail 40 appears not to be closely attached, and the actual gap amount of the point rail 40 and the base rail 30 in the not closely attached state can be obtained through the difference between the standard displacement amount and the actual displacement amount. When the point rail 40 appears to climb or tilt in the locked state, the standard displacement amount after close attachment is taken as a reference to count the pop-up or compression action of the action rod 11 in the front and back direction of the target plate 20 and the vertical direction, so as to realize the monitoring of climbing and tilting.

[0028] Further, as shown in Figure 5 and Figure 6 , the target plate 20 is a long strip-shaped plate structure, the point rail 40 has a strip-shaped mounting groove 41 extending along a preset horizontal straight line direction on the side wall facing the base rail 30, a plurality of second mounting holes are provided through the strip-shaped mounting groove 41 along the width direction of the point rail 40; the target plate 20 is arranged in the strip-shaped mounting groove and fixedly connected with the point rail 40 through the second mounting holes and the bolts to ensure that the working surface of the target plate 20 and the action rod 11 remain in a vertical relative state, thereby ensuring the accuracy of the extension and retraction movement displacement of the action rod 11.

[0029] The climbing and the head-raising movement of the frog 40 are often carried out simultaneously, so the linear displacement monitoring sensor 10 needs to ensure that the action lever 11 can record the action times 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 the same level as the two outermost monitoring ridges 22; the two ends of each monitoring ridge 22 extend to the same level as the two outermost monitoring grooves 21; that is, the plurality of monitoring grooves 21 and the plurality of monitoring ridges 22 are perpendicular to each other to form a rectangular detection area. When the frog 40 climbs and raises its head, the action lever 11 counts the monitoring grooves 21 and the monitoring ridges 22 that are contacted respectively, so as to ensure that the data of climbing and head-raising can be effectively recorded.

[0030] Further, the distance between the two adjacent monitoring grooves 21 is 2 mm; the distance between the two adjacent monitoring ridges 22 is 2 mm. The maximum monitoring threshold of the forward climbing, the backward climbing, the upward head-raising and the downward head-raising is 20 mm, that is, when the forward climbing, the backward climbing, the upward head-raising and the downward head-raising reach 20 mm, it has seriously affected the running safety of the train, and the background monitoring terminal 50 must be alarmed to remind the staff to maintain. Therefore, the first monitoring groove 211 and the second monitoring groove 212 are both ten, and the first monitoring ridge 221 and the second monitoring ridge 222 are both ten; the specific number of the first monitoring groove 211, the second monitoring groove 212, the first monitoring ridge 221 and the second monitoring ridge 222 can be increased or decreased according to the actual application requirements.

[0031] In the actual operation process, the forward climbing and the backward climbing of the frog 40 will be repeated alternately with the change of temperature in a period of time, and the actual climbing displacement is the difference between the two; for example, the forward climbing is 10 mm, and the backward climbing is 6 mm, so the actual climbing is 4 mm forward; for example, the forward climbing is 16 mm, and the backward climbing is 24 mm, so the actual climbing is 8 mm backward; only when the reference point is taken as the starting point of the climbing and the one-way climbing exceeds 20 mm, the alarm is given; so as to effectively avoid false alarm. Or another recording method is adopted, when the forward and backward reciprocating climbing occurs in the actual operation, the climbing displacement is cleared at each time through the reference point, only when the forward or backward one-way climbing exceeds 20 mm, the alarm is given. The head-raising is generally one-way displacement, so the alarm is given only when the upward head-raising or the downward head-raising exceeds 20 mm.

[0032] 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 head-raising monitoring process, further, the bottom surface of each monitoring groove 21 is an arc-shaped transition surface concave along the width direction thereof, and the top end of each monitoring ridge 22 is an arc-shaped transition surface convex along the width direction thereof. In addition, the end of the action rod 11 is a hemispherical surface structure. Thus, the obstruction during the relative movement of the end of the action rod 11 and each monitoring groove 21 and each monitoring ridge 22 can be effectively reduced, and the action rod 11 is prevented from being stuck by the monitoring groove 21 or the monitoring ridge 22.

[0033] The preferred embodiments of the present application are described above, but are not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for monitoring the close approach, creeping and head-raising of a switch rail, characterized in that The utility model relates to a linear displacement monitoring sensor (10) is installed on the basic rail (30), the linear displacement monitoring sensor (10) has the action lever (11) along its axial telescopic movement, the telescopic direction of action lever (11) is perpendicular to the side wall of basic rail (30), the target plate (20) is installed on the side wall of sharp rail (40) towards basic rail (30), the target plate (20) has the working face opposite basic rail (30), the working face has the reference point opposite the end of action lever (11) on, the working face is evenly spaced and is provided with a plurality of monitoring grooves (21) along the preset horizontal linear direction, each monitoring groove (21) extends along the vertical direction, the working face is evenly spaced and is provided with a plurality of monitoring convex edges (22) along the preset vertical linear direction, and each monitoring convex edge (22) extends along the horizontal direction, the background monitoring terminal (50) is connected with linear displacement monitoring sensor (10) through wired communication mode or wireless communication mode, wherein a plurality of monitoring grooves (21) include a plurality of first monitoring grooves (211) and a plurality of second monitoring grooves (212), a plurality of first monitoring grooves (211) and a plurality of second monitoring grooves (212) are located on both sides of the reference point along the preset horizontal linear direction respectively, a plurality of monitoring convex edges (22) include a plurality of first monitoring convex edges (221) and a plurality of second monitoring convex edges (222), a plurality of first monitoring convex edges (221) and a plurality of second monitoring convex edges (222) are located on both sides of the reference point along the preset vertical linear direction respectively, the first monitoring groove (211) and the second monitoring groove (212) are different in depth, the first monitoring convex edge (221) and the second monitoring convex edge (222) are different in protruding height. The rail waist of the basic rail (30) is provided with a first mounting hole along the width direction of the basic rail (30), the linear displacement monitoring sensor (10) passes through the first mounting hole and is fixedly installed. The target plate (20) is a long strip-shaped plate structure, the side wall of the sharp rail (40) towards the basic rail (30) has a strip-shaped mounting groove (41) extending along the preset horizontal linear direction, a second mounting hole is formed in the strip-shaped mounting groove (41) along the width direction of the sharp rail (40), and the target plate (20) is arranged in the strip-shaped mounting groove and fixedly connected with the sharp rail (40) through the second mounting hole. The two ends of each monitoring groove (21) extend to the same level as the two outermost monitoring convex edges (22), and the two ends of each monitoring convex edge (22) extend to the same level as the two outermost monitoring grooves (21). The distance between the two adjacent monitoring grooves (21) is 2mm, and the distance between the two adjacent monitoring convex edges (22) is 2mm.

2. The angle closure monitoring device according to claim 1, wherein, The bottom surface of the monitoring groove (21) is an arc-shaped transition surface concave in the width direction, and the top end of the monitoring convex edge (22) is an arc-shaped transition surface convex in the width direction.

3. The angle closure monitoring device according to claim 1, wherein, ​ 4. The angle closure monitoring device according to claim 1, wherein, ​ 5. The angle closure monitoring device according to claim 1, wherein, ​ 6. The angle closure, creep and jacking monitoring device of claim 1, wherein, ​ 7. The tongue close, creep, and head tilt monitoring device of claim 1, wherein, The end of the action lever (11) is a hemispherical structure.

Images