High-precision gauging rule rod with automatic positioning pulley

Abstract

The invention discloses a high-precision gauging rule rod with an automatic positioning pulley, relates to the technical field of track distance measurement, and discloses a gauging rule rod provided with an automatic positioning pulley and suitable for standard gauge, interval checking and back protection distance measurement and an operation method. A pulley is mounted on a measuring head on one side of the gauging rule rod, and a fixed measuring head is arranged on the other side of the gauging rule rod; and the adjusting ranges of the gauge gear adjuster are respectively 1435 gears, 1391 gears and 1348 gears. The pulley is installed at one end of the gauging rule, so that the gauging rule automatically adjusts the position of the distance measuring mechanism in the measuring process to enable the distance measuring mechanism to be tightly attached to a steel rail measuring point, errors caused by manual operation are reduced, and the accuracy of gauge measurement and the convenience of operation are improved. In addition, the gauging rule rod is provided with a built-in sensor, whether the gauge is qualified or not can be judged in real time, measured gauge data are transmitted to display equipment, and the gauge measurement efficiency is further improved.

Description

Technical Field

[0001] This invention relates to the field of railway track spacing measurement technology, and in particular to a track gauge rod and operating method suitable for high-precision measurement of standard track gauge, check interval, and backing distance. Background Technology

[0002] As the main artery of the national economy, railways drive regional coordinated development and resource flow; as a connecting link between society, they promote cultural exchange and improve people's livelihoods; as a cornerstone of strategic security, they safeguard national defense and emergency transportation; and as a green and efficient means of transportation, they lead sustainable development. Maintaining the correct railway geometry is fundamental to safe railway operation. Railway geometry encompasses factors such as track gauge, level, and elevation, with effective track gauge maintenance being a prerequisite for ensuring safe, smooth, and high-speed train operation. Track gauge condition directly relates to train safety, reducing the risk of derailment, minimizing wheel and rail wear, and ensuring transportation efficiency and economic benefits. Therefore, track gauge measurement is a crucial aspect of track engineering inspection and evaluation.

[0003] Track gauge rods are crucial equipment for measuring rail gauge, but most existing gauge rods are measured manually, which is prone to errors. Improper selection of measuring points, such as failing to measure 16mm below the rail tread, can lead to significant discrepancies between the measured and actual gauge values. Inconsistent operating force and posture, inconsistent pushing and pulling force, or improper vertical placement of the gauge rod can also cause the measuring head to not be tightly fitted to the rail, resulting in errors. Furthermore, the limited range of gauge rod measurements necessitates that surveyors carry various models of gauge rods to adapt to different working conditions when working in the field.

[0004] The purpose of this invention is to redesign existing gauge rods to integrate the measurement of standard gauge, inspection interval, and back guard distance onto a single gauge rod. Simultaneously, the pulleys mounted on the measuring head can automatically position themselves at the designated gauge measurement points, enabling high-precision measurement of standard gauge, inspection interval, and back guard distance. Summary of the Invention

[0005] This invention designs a high-precision gauge rod and operating method suitable for different working conditions. Compared with existing gauge rods, this invention can achieve high-precision measurement of standard gauge (1435mm), check interval (1391mm), and guard back distance (1348mm). Moreover, the pulley can be automatically positioned at the measured position (16mm below the rail tread) without manual calibration, thus achieving convenient measurement operation and high precision and small error of measurement data.

[0006] To achieve the above objectives, the present invention adopts the following design:

[0007] This invention designs a high-precision gauge rod with an automatic positioning pulley suitable for different working conditions, comprising four parts: a fixed probe, a gauge rod body, a gauge position adjuster, and an automatic positioning probe.

[0008] The fixed probe head is divided into a fixed metal probe head.

[0009] The track gauge rod includes a digital display (showing the gear position and track gauge), a measuring handle, and a metal rod body.

[0010] The track gauge adjuster includes an edge fixing device, a pulley adjusting device, a spring self-locking structure, and three sets of limiters.

[0011] The edge fixing device is integrated with the probe part with automatic positioning pulley and carries the pulley adjustment device.

[0012] The pulley adjustment device includes a pulley and a bearing, wherein the pulley can slide freely on the sliding surface of the limiter, and can realize the switching between different gears.

[0013] The aforementioned spring self-locking structure is located on the bearings on both sides of the fixed edge fixing device, and includes a button, a self-locking spring, and a self-locking groove. Installing the self-locking structure on the side of the edge fixing device enables the pulley to self-lock when it enters the limiter groove, preventing displacement in any direction.

[0014] The three types of limiters include a 1435mm limiter, a 1391mm limiter, and a 1348mm limiter; the three limiters correspond to the standard gauge measurement, the inspection interval measurement, and the backing distance measurement working conditions, respectively.

[0015] The automatic positioning probe includes a ranging mechanism and a digital display circuit system.

[0016] The distance measuring mechanism includes a positioning pulley (20mm in diameter, with the horizontal center axis of the pulley 16mm from the measuring bottom surface), a sliding groove, four sets of rubber pads, a metal slider, four sets of movable pulleys, two sets of spring locks, a distance measuring spring, and a fixed end for the measuring head.

[0017] The positioning pulley can roll freely on the surface of the rail head.

[0018] The movable pulley is integrated with the metal slider and the positioning pulley. Under the traction of the ranging spring, the movable pulley carries the metal slider and the positioning pulley to slide within the limited range of the slide groove, achieving high-precision measurement with automatic positioning of the positioning pulley. Simultaneously, four sets of rubber pads are installed at both ends of the slide groove to prevent the movable pulley from exceeding its measuring range and colliding with the slide groove wall during sliding.

[0019] The ranging spring is positioned between two sets of spring latches, one set of which is located in the middle of the metal slider; the other set of spring latches is located at the fixed end of the measuring head.

[0020] The digital display circuit system includes an electronic relay, a shear force sensor (mounted on the positioning pulley bearing), a displacement sensor, and red and green lights. The electronic relay controls two circuits: a red light circuit and a green light-displacement sensor circuit, enabling the determination of track gauge compliance and the display of the track gauge value.

[0021] The beneficial effects of this invention are: by redesigning the gauge rod and introducing an automatic positioning pulley, automatic positioning and high-precision measurement of the measuring points at standard gauge, inspection interval and backing distance are achieved. Attached Figure Description

[0022] To more clearly illustrate the measuring equipment and operating method of the present invention, the following drawings further explain the gauge rod measuring equipment and the three measuring conditions of standard gauge, reference interval, and backing distance. Figure 1 This is a structural diagram of the gauge rod. Figure 2 Detailed internal structure diagram of the automatic positioning pulley probe; Figure 3 Schematic diagram of the track gauge measurement gear adjuster; Figure 4 Detailed logic diagram of the measurement circuit operation; Figure 5 This is a schematic diagram of standard track gauge measurement operation; Figure 6 For reference, see the schematic diagram of the interval measurement operation; Figure 7 This is a schematic diagram of the back protection distance measurement operation.

[0023] The reference numerals in the diagram are as follows: Fixed probe part 1, fixed metal probe 101, gauge rod body 2, digital display 201, measuring handle 202, metal rod body 203, gauge range adjuster 3, edge fixing device 301, pulley adjusting device 302, pulley 302-1, bearing 302-2, spring self-locking structure 303, button 303-1, self-locking spring 303-2, self-locking slot 303-3, three sets of limiters 304, 1435mm limiter 304-1, 1391mm limiter 304-2, 1348mm limiter 304-3, automatic positioning probe 4, positioning pulley 401, slide groove 402, four sets of rubber pads 403, metal slider 404, four sets of moving pulleys 405, two sets of spring locks 406, distance measuring spring 407, probe fixed end 408. Detailed Implementation

[0024] The measuring device of the present invention will now be clearly and completely described and introduced with reference to the accompanying drawings.

[0025] Combination Figure 1 , Figure 2 , Figure 3 This paper introduces the structure of the gauge rod, which consists of four parts: the fixed measuring head, the gauge rod body, the gauge position adjuster, and the automatic positioning measuring head.

[0026] First, the fixed probe part (1). It mainly consists of a fixed metal probe (101).

[0027] Second, the gauge rod (2). It includes a digital display (201), a measuring handle (202), and a metal rod (203).

[0028] Third, the gauge adjustment device (3). It includes an edge fixing device (301), a pulley adjustment device (302), a spring self-locking structure (303), and three sets of limiters (304). The edge fixing device is integrated with the probe part with an automatic positioning pulley and supports the pulley adjustment device. The pulley adjustment device (302) includes a pulley (302-1) and a bearing (302-2), wherein the pulley can slide freely on the sliding surface of the limiter, and can realize the conversion between different gauges. The spring self-locking structure (303) is located on the bearings (302-2) on the left and right sides of the edge fixing device, and includes a button (303-1), a self-locking spring (303-2), and a self-locking slot (303-3). Installing the self-locking structure (303) on the side of the edge fixing device (301) can realize self-locking when the pulley (302-1) falls into the slot of the limiter (304), so that no displacement occurs in any direction. The three types of limiters include the 1435mm limiter (304-1), the 1391mm limiter (304-2), and the 1348mm limiter (304-3); the three limiters correspond to the standard gauge measurement, the check interval measurement, and the backing distance measurement working conditions, respectively.

[0029] Fourth, the automatic positioning probe (4). It includes a distance measuring mechanism and a digital display circuit system. The distance measuring mechanism includes a positioning pulley (401), a slide groove (402), four sets of rubber pads (403), a metal slider (404), four sets of movable pulleys (405), two sets of spring locks (406), a distance measuring spring (407), and a probe fixing end (408). The positioning pulley (401) has a diameter of 20mm, and the distance from the horizontal center axis of the pulley to the measuring bottom surface is 16mm. It can roll freely on the surface of the rail head. When the rolling stops, the measuring point is 16mm below the rail tread. The movable pulley (405) is integrated with the metal slider (404) and the positioning pulley (401). Under the traction of the ranging spring (407), the movable pulley (405) carries the metal slider (404) and the positioning pulley (401) to slide together within the limited range of the slide groove (402), realizing high-precision measurement of automatic positioning of the positioning pulley (401). At the same time, four sets of rubber pads (403) are installed at both ends of the slide groove (402) to prevent the movable pulley (405) from exceeding its range and colliding with the slide groove wall during the sliding process. The ranging spring (407) is placed between two sets of spring latches (406), one set of spring latches is placed in the middle of the metal slider (404); the other set of spring latches is placed at the probe fixing end (408).

[0030] Combination Figure 4 Explain the operating logic of the measurement circuit. An electronic relay, shear force sensor, displacement sensor, red light, and green light are installed in the gauge rod. The shear force sensor is mounted on the positioning pulley bearing. When the positioning pulley is not in contact with the rail, the positioning pulley bearing is not subjected to shear force, the shear force sensor does not display a value, the electronic relay connects the circuit to the red light circuit, and the red light illuminates (in standard gauge measurements, this indicates the gauge is unqualified and too wide; in measurements checking the gap and backing distance, this indicates the gauge is qualified and meets the specifications). When the positioning pulley is in contact with the rail, the positioning pulley bearing is subjected to shear force, the shear force sensor displays a value, the electronic relay connects the circuit to the green light-displacement sensor circuit, and the green light illuminates (in standard gauge measurements, this indicates the gauge value can be read; in measurements checking the gap and backing distance, this indicates the gauge is unqualified), the displacement sensor activates, and the gauge value is displayed on the digital display.

[0031] The following is based on Figure 5 , Figure 6 , Figure 7 This paper introduces the measurement technology of the present invention in actual measurement conditions.

[0032] Combination Figure 5 This describes the measurement conditions for standard gauge (1435mm). The standard gauge specified in my country is 1435mm, and the allowable measurement error range is +6mm to -2mm.

[0033] In this invention, the distance from the outermost edge of the fixed metal probe at setting 1435 to the farthest edge of the positioning pulley is 1441mm (1435+6mm). When the setting is adjusted to 1435, and the track gauge is within acceptable limits, the fixed metal probe is positioned against the inner edge of one side of the rail. The positioning pulley at the automatic positioning probe is placed on the rail tread. At this point, the distance measuring spring is at its original length, and the positioning pulley and the metal slider are located in the middle of the groove. Figure 5 As shown in (b). Gently press down on the measuring handle; the positioning pulley will roll on the surface of the rail head, while the measuring spring is stretched. The metal slider and the positioning pulley move to the left, as shown. Figure 5 As shown in (c), the positioning pulley slides to 16mm from the rail tread under external force and stops moving, indicating that the measuring point has been reached. Figure 5 As shown in (d), at this time the positioning pulley is in close contact with the rail measuring point, the green light is on, and the track gauge value at this point is displayed on the digital display.

[0034] If the track gauge is too large, exceeding 1441mm (1435+6mm), the positioning pulley cannot contact the rail, the distance measuring spring is at its original length, and the shear force on the positioning pulley bearing is zero. The shear force sensor does not detect shear force, the red light illuminates, and the digital display cannot show any value. If the track gauge is too small, less than 1433mm (1435-2mm), the measurement situation is the same as under acceptable track gauge conditions; the digital display shows a value, which can be used to determine if the track gauge is too narrow.

[0035] Combination Figure 6 This section describes the measurement conditions for the inspection interval (1391 increments). The inspection interval is the distance from the working edge of the guard rail to the working edge of the frog rail. The inspection interval stipulated in my country must be greater than 1391 mm.

[0036] In this invention, the distance from the inner side of the fixed metal probe to the furthest outer edge of the positioning pulley in the 1391-position setting is 1391mm. When the setting is adjusted to 1391, and the track gauge is within acceptable limits, the fixed metal probe is positioned tightly against the outer edge of the guard rail, and the positioning pulley at the automatic positioning probe is placed on the rail tread. If the track gauge is acceptable (greater than or equal to 1391mm), the automatic positioning pulley automatically limits its position to the measuring point (16mm below the rail tread). At this time, the measuring spring is at its original length, and the positioning pulley and the metal slider are located in the middle of the groove. Figure 6 As shown in (a). If the shear force sensor does not detect shear force, the red light illuminates, indicating that the track gauge is acceptable. If the track gauge is unacceptable (less than 1391mm), the positioning pulley at the automatic positioning probe is placed on the rail tread. Gently press down on the measuring handle; the positioning pulley will roll on the rail head surface, and simultaneously the measuring spring will be stretched. The metal slider and positioning pulley will move to the left, as shown in (a). Figure 6 As shown in (b). The positioning pulley slides to 16mm from the rail tread under external force and stops moving; this indicates the measuring point has been reached. Figure 6As shown in (c), at this time the positioning pulley is in close contact with the rail measuring point, the green light is on, and the track gauge value at this point is displayed on the digital display, which can determine that the track gauge is too narrow.

[0037] Combination Figure 7 This section describes the measurement conditions for the back rail distance (1348 setting). The back rail distance is the distance from the working edge of the guard rail to the working edge of the wing rail. The back rail distance stipulated in my country must be less than 1348 mm.

[0038] In this invention, the distance from the inner side of the fixed metal probe to the furthest outer edge of the positioning pulley in the 1348-position setting is 1348mm. When the setting is adjusted to 1348, and the track gauge is within acceptable limits, the fixed metal probe is positioned tightly against the outer edge of the guard rail, and the positioning pulley at the automatic positioning probe is placed on the rail tread. If the track gauge is acceptable (less than or equal to 1348mm), the automatic positioning pulley automatically limits its position to the measuring point (16mm below the rail tread). At this time, the measuring spring is at its original length, and the positioning pulley and the metal slider are located in the middle of the groove. Figure 7 As shown in (a). If the shear force sensor does not detect shear force, the red light illuminates, indicating the track gauge is acceptable. If the track gauge is unacceptable (greater than 1348mm), the positioning pulley at the automatic positioning probe is placed on the rail tread. Gently press down on the measuring handle; the positioning pulley will roll on the rail head surface, and simultaneously the measuring spring will be compressed. The metal slider and positioning pulley will move to the right, as shown in (a). Figure 7 As shown in (b). The positioning pulley slides to 16mm from the rail tread under external force and stops moving; this indicates the measuring point has been reached. Figure 7 As shown in (c), at this time the positioning pulley is in close contact with the rail measuring point, the green light is on, and the track gauge value at this point is displayed on the digital display, which can determine that the track gauge is too wide.

Claims

1. A gauge rod suitable for high precision measurement of track gauge under different working conditions, characterized in that, It comprises a fixed measuring head, a gauge rod body, a gauge position regulator and an automatic positioning measuring head; The fixed measuring head part is a fixed metal measuring head; The gauge rod body comprises a digital display, a measuring handle and a metal rod body; the digital display displays the position and gauge; The gauge position regulator comprises an edge fixing device, a pulley adjusting device, a spring self-locking structure and three sets of limiters; The edge fixing device is connected with the measuring head part with an automatic positioning pulley and bears the pulley adjusting device; The pulley adjusting device comprises a pulley and a bearing, wherein the pulley can freely slide on the sliding surface of the limiter and can realize the conversion between different positions; The spring self-locking structure is arranged on the bearings on the left and right sides of the edge fixing device and comprises a button, a self-locking spring and a self-locking slot; the installation of the self-locking structure on the side of the edge fixing device can realize self-locking when the pulley falls into the slot of the limiter, so that displacement does not occur in each direction; The three kinds of limiters comprise a 1435mm limiter, a 1391mm limiter and a 1348mm limiter; wherein the three kinds of limiters correspond to standard gauge measurement, interval measurement and back distance measurement working conditions in turn; The automatic positioning measuring head comprises a distance measuring mechanism and a digital display circuit system.

2. The gauge rod according to claim 1, wherein The distance measuring mechanism comprises a positioning pulley, a sliding groove, four sets of rubber pads, a metal sliding block, four sets of moving pulleys, two sets of spring locks, a distance measuring spring and a measuring head fixed end; The positioning pulley can freely roll on the surface of the rail head; The moving pulley is connected with the metal sliding block and the positioning pulley as a whole, and under the traction of the distance measuring spring, the moving pulley carries the metal sliding block and the positioning pulley to slide within the limit range of the sliding groove, realizing high-precision measurement of the automatic positioning of the positioning pulley; at the same time, four sets of rubber pads are installed at both ends of the sliding groove to prevent the moving pulley from colliding with the sliding groove wall during sliding; The distance measuring spring is arranged between the two sets of spring locks, one set of spring lock is arranged in the middle of the metal sliding block, and the other set of spring lock is arranged in the measuring head fixed end.

3. The gauge rod according to claim 1, wherein The digital display circuit system comprises an electronic relay, a shear force sensor installed on the bearing of the positioning pulley, a displacement sensor, a red light and a green light; wherein the electronic relay controls two circuits, one is a red light circuit, and the other is a green light-displacement sensor circuit; realizing gauge qualification judgment and gauge value display.

4. The gauge rod according to claim 1, wherein The electronic relay, the shear sensor, the displacement sensor, the red light and the green light are arranged in the track gauge ruler; the shear sensor is arranged on the positioning pulley bearing; when the positioning pulley does not contact the steel rail, the positioning pulley bearing is not subjected to shear, the shear sensor does not display a value, the electronic relay connects the red light circuit, and the red light is turned on; when the standard track gauge is measured, it represents that the track gauge is unqualified and too wide; when the track gauge is measured, it represents that the track gauge is qualified and meets the specification requirements; when the positioning pulley contacts the steel rail, the positioning pulley bearing is subjected to shear, the shear sensor displays a value, the electronic relay connects the green light-displacement sensor circuit, and the green light is turned on; when the standard track gauge is measured, it represents that the track gauge value can be read; when the track gauge is measured, it represents that the track gauge is unqualified; the displacement sensor works, and the track gauge value is displayed on the digital display.

5. The method of applying the track gauge ruler according to claim 1, characterized in that, 1435 stop fixed metal probe outside to the farthest edge of the positioning pulley is 1441 mm, that is, 1435+6 mm, and the stop is adjusted to 1435 stop. In the case of qualified track gauge, the fixed metal probe is clamped to the inner edge of one side of the steel rail, the positioning pulley at the position of the probe is placed on the steel rail tread, at this time, the distance measuring spring is the original length, and the positioning pulley and the metal sliding block are located in the middle of the sliding groove; the measurement handle is pressed downward, the positioning pulley rolls on the surface of the rail head, at the same time, the distance measuring spring is stretched, and the metal sliding block and the positioning pulley move to the left side; the positioning pulley slides to the position 16 mm away from the steel rail tread under the action of external force, and no longer moves, that is, the measuring point position is reached, at this time, the positioning pulley is close to the measuring point of the steel rail, the green light is turned on, and the track gauge value at this position is displayed on the digital display; If the track gauge is too large and exceeds 1441 mm, at this time, the positioning pulley cannot contact the steel rail, the distance measuring spring is the original length, the shear on the positioning pulley bearing is zero, the shear sensor does not detect the shear, the red light is turned on, and the digital display cannot display the value; if the track gauge is too small and less than 1433 mm, that is, 1435-2 mm, at this time, the measurement condition is the same as that in the case of qualified track gauge, the digital display displays the value, and the track gauge can be read.

6. The method of applying the track gauge ruler according to claim 1, characterized in that, 1391 stop fixed metal probe inside to the farthest outer edge of the positioning pulley is 1391mm, the gear is adjusted to 1391 stop, in the case of eligible track gauge, the fixed metal probe is clamped to the outer edge of the guard rail, the positioning pulley at the automatic positioning probe is placed on the steel rail tread; if the track gauge is eligible, that is, greater than or equal to 1391mm, the automatic positioning pulley is automatically limited to the measuring point, that is, 16mm below the steel rail tread, at this time the distance measuring spring is the original length, the positioning pulley and the metal slider are located in the middle of the sliding groove; the shear sensor does not detect shear, the red light is on, that is, the track gauge is eligible; if the track gauge is not eligible, that is, less than 1391mm, the positioning pulley at the automatic positioning probe is placed on the steel rail tread, the measurement handle is pressed gently downward, the positioning pulley will roll on the surface of the steel rail head, at the same time the distance measuring spring is stretched, the metal slider and the positioning pulley move to the left side; the positioning pulley slides to 16mm below the steel rail tread under the action of external force, and does not move any more, that is, it reaches the measuring point position, at this time the positioning pulley is close to the steel rail measuring point, the green light is on, the track gauge value at this point is displayed on the digital display, and it can be judged that the track gauge is too narrow.

7. The method of using the rail gauge ruler according to claim 1, characterized in that, 1348 stop fixed metal probe inside to the farthest outer edge of the positioning pulley is 1348mm, the gear is adjusted to 1348 stop, in the case of eligible track gauge, the fixed metal probe is clamped to the outer edge of the guard rail, the positioning pulley at the automatic positioning probe is placed on the steel rail tread; if the track gauge is eligible, that is, less than or equal to 1348mm, the automatic positioning pulley is automatically limited to the measuring point, that is, 16mm below the steel rail tread, at this time the distance measuring spring is the original length, the positioning pulley and the metal slider are located in the middle of the sliding groove, the shear sensor does not detect shear, the red light is on, that is, the track gauge is eligible; if the track gauge is not eligible, that is, greater than 1348mm, the positioning pulley at the automatic positioning probe is placed on the steel rail tread, the measurement handle is pressed gently downward, the positioning pulley will roll on the surface of the steel rail head, at the same time the distance measuring spring is compressed, the metal slider and the positioning pulley move to the right side, the positioning pulley slides to 16mm below the steel rail tread under the action of external force, and does not move any more, that is, it reaches the measuring point position, at this time the positioning pulley is close to the steel rail measuring point, the green light is on, the track gauge value at this point is displayed on the digital display, and it can be judged that the track gauge is too wide.

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