A device for measuring track spacing in subway track construction

Abstract

The present invention relates to the technical field of subway track spacing measurement, and discloses a subway track construction track spacing measurement device, including a track gauge rod, a handle is installed at the top center of the track gauge rod, and a display is provided at the top of the track gauge rod on the handle side, and a distance measuring mechanism is provided at one end inside the track gauge rod, and the bottom end of the distance measuring mechanism extends to the outside of the track gauge rod. The present invention realizes automatic calibration of the position of the other detection end of the track gauge rod through the clamping and fixing effect of the single track by the calibration mechanism in conjunction with the torsion spring clamp and the right locking roller, so that the track gauge rod is vertically distributed with the two tracks, thereby ensuring the accuracy of track gauge detection, and this method reduces manual operation and improves the accuracy of calibration. At the same time, because the moving distance of the two calibration rods is within a certain range, the device can adapt to the vertical calibration of both the straight track and the curved track.

Description

Technical Field

[0001] The invention relates to the technical field of subway track spacing measurement, and in particular to a subway track construction track spacing measurement device. Background Art

[0002] Subway is a type of urban rail transit line system, which refers to a fast, large-capacity, electric-powered rail transit built in the city. The normal operation of the subway depends on the support of the subway track. The subway track is mainly composed of two parallel tracks, and the distance between the tracks, i.e. the track gauge, needs to meet the standard setting. During the construction of the subway track, the subway track gauge needs to be measured and calibrated using a track gauge.

[0003] Chinese patent authorization announcement No. CN221029341U discloses a railway track spacing measuring device, including a pair of receiving plates, a pair of connecting rods, a pair of fixed plates, a pair of fixed rods, a pair of limiting wheels, a pair of walking wheels, a working box and an elastic limiting assembly. The pair of receiving plates are connected by the elastic limiting assembly, which can make the two receiving plates tend to approach each other. Distance sensors are arranged at the center positions of the opposite surfaces of the pair of receiving plates. It is more labor-saving for people to pull and walk than to carry the equipment on their backs, and the equipment does not need to leave the rails. When measuring, it is only necessary to transmit data through the distance sensor to obtain the distance between the rails. The measurement is quick and the work efficiency is improved.

[0004] The above-mentioned prior art solution has the following shortcomings: the device uses the limiting wheels on the left and right sides to fit with the side walls of the rail to achieve the measurement of the track gauge, but during the measurement process, in order to ensure the accuracy of the measurement, it is generally required that the detection end of the track gauge be kept perpendicular to the side wall of the track to ensure that the distance detected by the track gauge is the distance between the two tracks. Since no relevant calibration structure is set in this structure, the position of the track gauge needs to be adjusted manually and with the cooperation of the human eye. The accuracy and convenience of its operation are average, and there is room for improvement. Summary of the invention

[0005] The object of the present invention is to provide a track spacing measuring device for subway track construction, so as to solve the problem that the existing track spacing measuring device for subway track construction proposed in the above background technology is not easy to adaptively calibrate and adjust its own placement position.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a track spacing measuring device for subway track construction, comprising a track gauge rod, a handle is installed at the top center of the track gauge rod, and a display is arranged at the top of the track gauge rod on one side of the handle, a distance measuring mechanism is arranged at one end inside the track gauge rod, and the bottom end of the distance measuring mechanism extends to the outside of the track gauge rod, a right locking roller is rotatably connected to the side of the bottom end of the track gauge rod away from the distance measuring mechanism, and a magnet is arranged inside the right locking roller, a torsion spring clamping plate is arranged on the side of the track gauge rod close to the right locking roller, and the outer and inner side walls of a track are clamped by the cooperation of the torsion spring clamping plate and the right locking roller, and a locking assembly is arranged on the top of the torsion spring clamping plate, a proofreading mechanism is arranged on the side of the top of the track gauge rod close to the right locking roller, and one side of the proofreading mechanism is connected to the top of the locking assembly, and the movement of the proofreading mechanism is used to cooperate with the right locking roller to adjust the position of the other end of the track gauge rod, so that the track gauge rod and the two tracks are vertically distributed;

[0007] The proofreading mechanism includes an electric push rod installed at one end near the right locking roller, and a slide plate is installed at one end of the electric push rod, telescopic sleeves are passed through both ends of the slide plate, and proofreading rods are installed on the outer side of the bottom end of the telescopic sleeve, a limiting guide hole is opened at one end of the track gauge rod near the right locking roller, and guide rods are slidably passed through both ends of the limiting guide hole, and the outer ends of the guide rods extend to the outside of the track gauge rod and are connected to one side of the proofreading rod.

[0008] Preferably, the top-view structure of the limiting guide hole is V-shaped, and the V-shaped opening faces the inner wall of the track, and the right locking roller and the track gauge rod are both located on the angular bisector of the limiting guide hole.

[0009] Preferably, two proofreading rods are provided, and in an initial state, the two proofreading rods are respectively located on both sides of the right locking roller, away from the inner wall of the track.

[0010] Preferably, the locking assembly includes a flip plate hinged to the outer edge of the top end of the torsion spring clamp, and the outer sliding sleeve of the flip plate is provided with a hinge ring, the inner side of the hinge ring is hinged to the outer edge of the track gauge rod, a locking hole is provided at one end of the flip plate close to the slide, and a locking rod is installed on the side of the slide opposite to the electric push rod.

[0011] Preferably, when the torsion spring clamp is in a clamping state, the locking rod and the locking hole are coaxially and collinearly distributed, and as the locking rod moves horizontally, the locking rod passes through the interior of the locking hole.

[0012] Preferably, the distance measuring mechanism includes a distance measuring cavity opened inside the track gauge rod away from one end of the right locking roller, and a displacement sensor is installed on one side of the distance measuring cavity, the displacement sensor is connected to the display through a wire, a guide slide bar is installed at the bottom end of one side of the displacement sensor, and one end of the guide slide bar is connected to the inner wall of the distance measuring cavity, the outer sliding sleeve of the guide slide bar is provided with a left measuring roller, and the bottom end of the left measuring roller extends to the outside of the track gauge rod, a sleeve rod is installed on the side of the left measuring roller close to the displacement sensor, and a spring is installed on one end of the sleeve rod, one end of the spring is abutted against one side of the displacement sensor, and the spring and the sleeve rod are both sleeved on the outside of the guide slide bar.

[0013] Preferably, the outer edges of both sides of the bottom end of the track gauge rod are fixedly connected with fixed support plates, and sliding support plates are slidably installed on the outside of the fixed support plates, and the bottom ends of the sliding support plates are embedded with ball bearings. At the same time, inclined holes are opened on both sides of the sliding support plates, and pushing blocks are penetrated through the insides of the inclined holes. The outer ends of the two pushing blocks are connected with U-shaped push plates, and an electric telescopic rod is installed at the end of the U-shaped push plate away from the sliding support plate. There are two electric telescopic rods in total, and a self-starting mechanism is connected between the two electric telescopic rods.

[0014] Preferably, there are two fixed support plates in total, and the top view structure of the fixed support plates is U-shaped, and the two fixed support plates wrap the left measuring roller and the right locking roller inside respectively.

[0015] Preferably, the self-starting mechanism includes a cavity opened in the center of the track gauge rod, and an upper metal plate is installed at the top of the cavity, a lower metal plate is installed at the bottom of the cavity, and a metal column is slidably connected between the lower metal plate and the upper metal plate, and a floating sleeve is provided on the outer sleeve of the metal column, and an insulating layer is provided at the center position of the upper metal plate and the lower metal plate, controllers are installed on both sides of the center of the bottom end of the track gauge rod, and a single controller controls the start of the electric telescopic rod on the same side.

[0016] Preferably, the interior of the cavity is filled with insulating liquid, and when the two ends of the metal column are away from the insulating layer and the two ends of the metal column are respectively against the metal sections on the left side of the upper metal plate and the lower metal plate, the right controller is powered on and started.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) Through the cooperation of the right locking roller and the torsion spring clamp, the detection point of a track can be fixed. When the track gauge rod is placed at an angle on the two tracks, the two side calibration rods simultaneously approach the inner wall of the track. One of the calibration rods first contacts the track side wall, so that the single-side calibration rod presses against the track to generate a driving force, causing the track gauge rod to deviate with the right locking roller as the rotation axis. When both calibration rods are against the inner wall of the track, the automatic calibration of the other detection end position of the track gauge rod is realized, so that the track gauge rod is vertically distributed with the two tracks, thereby ensuring the accuracy of track gauge detection. This method reduces manual operation and improves the accuracy of calibration. At the same time, since the moving distance of the two calibration rods is within a certain range, the device can adapt to the vertical calibration of both straight tracks and curved tracks.

[0019] The sliding plate is extended to push the locking rod toward the locking hole, and the locking rod penetrates the locking hole to lock the position of the flip plate in combination with the hinge ring, thereby locking the top flip surface of the torsion spring clamp plate to prevent the torsion spring clamp plate from flipping and moving, thereby ensuring that the torsion spring clamp plate and the right locking roller stably clamp the inner and outer side walls of the track to ensure the accuracy of the detection point;

[0020] (2) Through the buoyancy of the insulating liquid inside the cavity, when the track gauge rod is tilted, it can drive the metal column to shift inside the cavity. The metal column is used to switch on and off the power of the upper metal plate and the lower metal plate at different positions on the left and right to realize the asynchronous control of the left and right electric telescopic rods, and then control the placement height of the two ends of the track gauge rod on the inner and outer tracks. When the track gauge rod is used to detect the curved track, the placement of the track gauge rod can be automatically calibrated horizontally, so as to further ensure the accuracy of the device in detecting the track gauge of the inner and outer rails of the curved track. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of a cross-sectional three-dimensional structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the distance measuring mechanism of the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the proofreading rod distribution of the present invention;

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the locking assembly of the present invention;

[0027] Figure 6 It is a schematic diagram of the front view structure of the locking assembly of the present invention;

[0028] Figure 7 It is a bottom-up three-dimensional structural schematic diagram of the sliding support plate of the present invention;

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the push block distribution of the present invention.

[0030] Explanation of the reference numerals in the figure: 1. track gauge rod; 2. self-starting mechanism; 201. cavity; 202. upper metal plate; 203. lower metal plate; 204. metal column; 205. floating sleeve; 206. insulating layer; 207. controller; 3. display; 4. handle; 5. proofreading mechanism; 501. electric push rod; 502. slide plate; 503. telescopic sleeve; 504. limit guide hole; 505. guide rod; 506. proofreading rod; 6. locking assembly ;601, locking rod; 602, flip plate; 603, locking hole; 604, hinged ring; 7, torsion spring clamp; 8, right locking roller; 9, distance measuring mechanism; 901, distance measuring cavity; 902, displacement sensor; 903, left measuring roller; 904, guide slide rod; 905, sleeve rod; 906, spring; 10, electric telescopic rod; 11, fixed support plate; 12, sliding support plate; 13, ball bearing; 14, U-shaped push plate; 15, inclined hole; 16, push block. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0032] Embodiment 1: In order to solve the problem that the existing subway track construction track spacing measurement device is not easy to adjust its own placement position adaptively, the following solution is disclosed, specifically as follows: Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 5 , Figure 6 As shown:

[0033] A device for measuring the track spacing of subway track construction comprises a track gauge rod 1, a handle 4 is installed at the top center of the track gauge rod 1, and a display 3 is arranged at the top of the track gauge rod 1 on one side of the handle 4, a distance measuring mechanism 9 is arranged at one end inside the track gauge rod 1, and the bottom end of the distance measuring mechanism 9 extends to the outside of the track gauge rod 1, a right locking roller 8 is rotatably connected to the side of the bottom end of the track gauge rod 1 away from the distance measuring mechanism 9, and a magnet is arranged inside the right locking roller 8, and a side of the track gauge rod 1 close to the right locking roller 8 is rotated to the side of the track gauge rod 1 close to the right locking roller 8. A torsion spring clamp 7 is arranged on the side, and the outer and inner side walls of a track are clamped by the cooperation of the torsion spring clamp 7 and the right locking roller 8, and a locking assembly 6 is arranged on the top of the torsion spring clamp 7, and a proofreading mechanism 5 is arranged on the side of the top of the track gauge rod 1 close to the right locking roller 8, and one side of the proofreading mechanism 5 is connected to the top of the locking assembly 6, and the movement of the proofreading mechanism 5 cooperates with the right locking roller 8 to adjust the position of the other end of the track gauge rod 1, so that the track gauge rod 1 is vertically distributed with the two tracks;

[0034] The proofreading mechanism 5 includes an electric push rod 501 installed at one end near the right locking roller 8, and a slide plate 502 is installed at one end of the electric push rod 501, and telescopic sleeves 503 are penetrated at both ends of the slide plate 502, and proofreading rods 506 are installed on the outer side of the bottom end of the telescopic sleeve 503, and a limit guide hole 504 is opened at one end of the track gauge rod 1 near the right locking roller 8, and guide rods 505 are slidably penetrated at both ends of the limit guide hole 504, and the outer ends of the guide rods 505 extend to the outside of the track gauge rod 1 and are connected to one side of the proofreading rod 506;

[0035] The top view structure of the limiting guide hole 504 is V-shaped, and the V-shaped opening faces the inner wall of the track. The right locking roller 8 and the track gauge rod 1 are both located on the angular bisector of the limiting guide hole 504.

[0036] Two calibration rods 506 are provided. In the initial state, the two calibration rods 506 are respectively located on both sides of the right locking roller 8 away from the inner wall of the track;

[0037] The locking assembly 6 comprises a flip plate 602 hinged to the outer edge of the top end of the torsion spring clamp plate 7, and the outer sliding sleeve of the flip plate 602 is provided with a hinge ring 604, the inner side of the hinge ring 604 is hinged to the outer edge of the track gauge rod 1, and a locking hole 603 is provided at one end of the flip plate 602 close to the slide plate 502, and a locking rod 601 is installed on the side of the slide plate 502 opposite to the electric push rod 501;

[0038] When the torsion spring clamp 7 is in the clamping state, the locking rod 601 and the locking hole 603 are coaxially distributed, and as the locking rod 601 moves horizontally, the locking rod 601 passes through the interior of the locking hole 603;

[0039] The distance measuring mechanism 9 includes a distance measuring cavity 901 opened inside the track gauge rod 1 away from one end of the right locking roller 8, and a displacement sensor 902 is installed on one side of the distance measuring cavity 901, and the displacement sensor 902 is connected to the display 3 through a wire, and a guide slide bar 904 is installed at the bottom end of one side of the displacement sensor 902, and one end of the guide slide bar 904 is connected to the inner wall of the distance measuring cavity 901, and the outer sliding sleeve of the guide slide bar 904 is provided with a left measuring roller 903, and the bottom end of the left measuring roller 903 extends to the outside of the track gauge rod 1, and a sleeve rod 905 is installed on the side of the left measuring roller 903 close to the displacement sensor 902, and a spring 906 is installed on one end of the sleeve rod 905, and one end of the spring 906 is against one side of the displacement sensor 902, and the spring 906 and the sleeve rod 905 are both sleeved on the outside of the guide slide bar 904.

[0040] In this embodiment, when in use, the two balls 13 at the bottom end of the track gauge rod 1 are respectively placed on the end surface of one track, so that the track gauge rod 1 is placed between the two tracks, the right locking roller 8 is abutted against the inner wall of the track, and the torsion spring clamping plate 7 is abutted against the outer wall of the track, so that the torsion spring clamping plate 7 and the right locking roller 8 clamp the same track, and the elasticity of the spring 906 is used to make the sleeve rod 905 abut against the inner wall of another track, and the electric push rod 501 is started to extend, so that the slide plate 502 approaches the track, and then the telescopic sleeve plate 503 pulls the correction rod 506 to approach synchronously. Since the correction rod 506 is limited and guided by the guide rod 505 and the limit guide hole 504, the telescopic sleeve plate 503 extends to both sides along the slide plate 502, and then the two correction rods are moved closer. The rods 506 move synchronously on both sides of the right locking roller 8 and approach the inner wall of the track. When the track gauge rod 1 is inclined to the two tracks, one of the calibration rods 506 first contacts the side wall of the track. Since the calibration rod 506 on the other side does not contact the side wall of the track, the electric push rod 501 continues to extend, so that the calibration rod 506 on the contacting side squeezes the side wall of the track to generate a driving force on one side of the track gauge rod 1, and then the track gauge rod 1 drives the ball 13 away from one end of the right locking roller 8 to roll on the track surface, that is, the other end of the track gauge rod 1 rotates with the right locking roller 8 as the rotating axis, and then adjusts the verticality between the track gauge rod 1 as a whole and the two tracks. When the two calibration rods 506 synchronously contact the side wall of the track, the calibration of the position of the track gauge rod 1 is realized.

[0041] Due to the movement of the slide plate 502, the locking rod 601 moves synchronously, so that the locking rod 601 is horizontally inserted into the locking hole 603. Since the flip plate 602 is tilted under the action of the hinge ring 604, the locking hole 603 cooperates with the locking rod 601 to lock the tilt of the flip plate 602, and then the bottom end of the flip plate 602 and the position of the torsion spring clamping plate 7 are fixed, so that during the movement of the track gauge rod 1, the torsion spring clamping plate 7 and the right locking roller 8 maintain a stable state for clamping and fixing the single track detection point, thereby ensuring the stability of the offset calibration of one end of the track gauge rod 1;

[0042] When the calibration is completed, since the distance between the displacement sensor 902 and the right locking roller 8 is fixed, the detection end of the displacement sensor 902 is started to detect the position of the left measuring roller 903, and then the final track spacing value is displayed through the display 3 to complete the measurement of the track spacing.

[0043] Embodiment 2: This embodiment is different from the embodiment 1. The self-starting mechanism is used to realize the calibration of the horizontal angle of the gauge rod 1 to adapt to the gauge measurement of the curved track. Figure 1 , Figure 2 , Figure 7 , Figure 8 As shown:

[0044] The outer edges of both sides of the bottom end of the track gauge rod 1 are fixedly connected with fixed support plates 11, and the outside of the fixed support plates 11 is slidably installed with sliding support plates 12, and the bottom ends of the sliding support plates 12 are embedded with balls 13. At the same time, inclined holes 15 are opened on both sides of the sliding support plates 12, and the insides of the inclined holes 15 are penetrated by push blocks 16. The outer ends of the two push blocks 16 are connected with U-shaped push plates 14, and the end of the U-shaped push plate 14 away from the sliding support plate 12 is installed with an electric telescopic rod 10. There are two electric telescopic rods 10 in total, and a self-starting mechanism 2 is connected between the two electric telescopic rods 10;

[0045] There are two fixed support plates 11 in total, and the top view structure of the fixed support plates 11 is U-shaped, and the two fixed support plates 11 respectively wrap the left measuring roller 903 and the right locking roller 8 inside;

[0046] The self-starting mechanism 2 includes a cavity 201 opened in the center of the track gauge rod 1, and an upper metal plate 202 is installed at the top of the cavity 201, a lower metal plate 203 is installed at the bottom of the cavity 201, and a metal column 204 is slidably connected between the lower metal plate 203 and the upper metal plate 202, and a floating sleeve 205 is provided on the outer sleeve of the metal column 204, and an insulating layer 206 is provided at the center of the upper metal plate 202 and the lower metal plate 203. Controllers 207 are installed on both sides of the center of the bottom end of the track gauge rod 1, and a single controller 207 controls the start of the electric telescopic rod 10 on the same side;

[0047] The cavity 201 is filled with insulating liquid. When the two ends of the metal column 204 are away from the insulating layer 206 and the two ends of the metal column 204 respectively abut against the metal segments on the left side of the upper metal plate 202 and the lower metal plate 203, the right controller 207 is powered on and started.

[0048] In this embodiment, when it is necessary to measure the curved track during use, for safety reasons, there is a certain height difference between the inner and outer tracks of the curved track. If the track gauge rod 1 is directly placed on the track surface, it is easy to increase the deviation of the track gauge measurement. Therefore, after the above calibration is completed, since the track gauge rod 1 is inclined, and the interior of the cavity 201 is filled with insulating liquid, then under the action of buoyancy, the floating sleeve 205 is offset and slid relative to the insulating layer 206, and then the floating sleeve 205 is moved to the metal section between the cavity 201 and the lower metal plate 203, so that the metal column 204, the floating sleeve 205 and the lower metal plate 203 are matched with each other to cooperate with the conductivity of the metal column 204. The circuits between the controllers 207 on different sides of the bottom end of the gauge rod 1 are connected, so that the electric telescopic rod 10 at the lower end of the gauge rod 1 can be started to extend, so that the electric telescopic rod 10 pushes the U-shaped push plate 14 to move toward the outer end. Since the push block 16 is always in the inclined hole 15, the sliding support plate 12 generates a downward pushing force, so that the sliding support plate 12 moves downward relative to the fixed support plate 11, so that the sliding support plate 12 increases the support height of the lower end of the gauge rod 1 to balance the heights of the two ends of the gauge rod 1, and when the gauge rod 1 is in a horizontal state, the floating sleeve 205 slides back to the position of the insulating layer 206 under the action of buoyancy to achieve a short circuit, that is, to complete the horizontal calibration work.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the track spacing of a subway track, comprising a track gauge rod (1), characterized in that: A handle (4) is installed at the center of the top end of the track gauge rod (1), and a display (3) is arranged at the top end of the track gauge rod (1) on one side of the handle (4); a distance measuring mechanism (9) is arranged at one end inside the track gauge rod (1), and the bottom end of the distance measuring mechanism (9) extends to the outside of the track gauge rod (1); a right locking roller (8) is rotatably connected to the side of the bottom end of the track gauge rod (1) away from the distance measuring mechanism (9), and a magnet is arranged inside the right locking roller (8); a torsion spring clamp ( 7), the outer and inner side walls of a track are clamped by the cooperation of the torsion spring clamp (7) and the right locking roller (8), and a locking assembly (6) is arranged at the top of the torsion spring clamp (7), and a calibration mechanism (5) is arranged on the side of the top of the track gauge rod (1) close to the right locking roller (8), and one side of the calibration mechanism (5) is connected to the top of the locking assembly (6), and the movement of the calibration mechanism (5) cooperates with the right locking roller (8) to adjust the position of the other end of the track gauge rod (1), so that the track gauge rod (1) and the two tracks are vertically distributed; The calibration mechanism (5) comprises an electric push rod (501) installed at one end close to the right locking roller (8), and a slide plate (502) is installed at one end of the electric push rod (501), both ends of the slide plate (502) are penetrated by telescopic sleeves (503), and a calibration rod (506) is installed on the outer side of the bottom end of the telescopic sleeve (503), a limit guide hole (504) is provided at one end of the track gauge rod (1) close to the right locking roller (8), and guide rods (505) are slidably penetrated at both ends of the limit guide hole (504), and the outer ends of the guide rods (505) extend to the outside of the track gauge rod (1) and are connected to one side of the calibration rod (506); The outer edges of both sides of the bottom end of the track gauge rod (1) are fixedly connected to fixed support plates (11), and sliding support plates (12) are slidably installed on the outside of the fixed support plates (11), and the bottom ends of the sliding support plates (12) are embedded with balls (13). At the same time, inclined holes (15) are opened on both sides of the sliding support plates (12), and push blocks (16) are penetrated inside the inclined holes (15). The outer ends of the two push blocks (16) are connected to U-shaped push plates (14), and the end of the U-shaped push plate (14) away from the sliding support plate (12) is installed with an electric telescopic rod (10), and a total of two electric telescopic rods (10) are provided, and a self-starting mechanism (2) is connected between the two electric telescopic rods (10); A total of two fixed support plates (11) are provided, and the fixed support plates (11) are U-shaped in a top view, and the two fixed support plates (11) respectively wrap the left measuring roller (903) and the right locking roller (8) inside; The self-starting mechanism (2) comprises a cavity (201) opened at the center of the track gauge rod (1), and an upper metal plate (202) is installed at the top of the cavity (201), a lower metal plate (203) is installed at the bottom of the cavity (201), and a metal column (204) is slidably connected between the lower metal plate (203) and the upper metal plate (202), and a floating sleeve (205) is provided on the outside of the metal column (204), and an insulating layer (206) is provided at the center of the upper metal plate (202) and the lower metal plate (203), and controllers (207) are installed on both sides of the center of the bottom end of the track gauge rod (1), and a single controller (207) controls the start of the electric telescopic rod (10) on the same side; The cavity (201) is filled with insulating liquid, and when the two ends of the metal column (204) are away from the insulating layer (206), and the two ends of the metal column (204) are respectively against the metal sections on the left side of the upper metal plate (202) and the lower metal plate (203), the right controller (207) is powered on and started.

2. A subway track construction track spacing measuring device according to claim 1, characterized in that: The limit guide hole (504) is V-shaped in a top view, with the V-shaped opening facing the inner wall of the track, and the right locking roller (8) and the track gauge rod (1) are both located on the angular bisector of the limit guide hole (504).

3. A subway track construction track spacing measuring device according to claim 1, characterized in that: Two calibration rods (506) are provided. In an initial state, the two calibration rods (506) are respectively located on both sides of the right locking roller (8) away from the inner wall of the track.

4. A subway track construction track spacing measuring device according to claim 1, characterized in that: The locking assembly (6) comprises a flip plate (602) hinged to the outer edge of the top end of the torsion spring clamp (7), and the outer sliding sleeve of the flip plate (602) is provided with a hinge ring (604), the inner side of the hinge ring (604) is hinged to the outer edge of the track gauge rod (1), and a locking hole (603) is provided at one end of the flip plate (602) close to the slide plate (502), and a locking rod (601) is installed on the side of the slide plate (502) opposite to the electric push rod (501).

5. A subway track construction track spacing measuring device according to claim 4, characterized in that: When the torsion spring clamp (7) is in a clamping state, the locking rod (601) and the locking hole (603) are coaxially and collinearly distributed, and as the locking rod (601) moves horizontally, the locking rod (601) passes through the interior of the locking hole (603).

6. A subway track construction track spacing measuring device according to claim 1, characterized in that: The distance measuring mechanism (9) comprises a distance measuring cavity (901) opened inside the track gauge rod (1) at one end away from the right locking roller (8), and a displacement sensor (902) is installed on one side inside the distance measuring cavity (901), and the displacement sensor (902) is connected to the display (3) via a wire, and a guide slide bar (904) is installed at the bottom end of one side of the displacement sensor (902), and one end of the guide slide bar (904) is connected to the inner wall of the distance measuring cavity (901), and the guide slide bar (904) is connected to the inner wall of the distance measuring cavity (901). ) is provided with a left measuring roller (903) on the outer sliding sleeve, and the bottom end of the left measuring roller (903) extends to the outside of the track gauge rod (1); a sleeve rod (905) is installed on the side of the left measuring roller (903) close to the displacement sensor (902), and a spring (906) is installed at one end of the sleeve rod (905), one end of the spring (906) is against one side of the displacement sensor (902), and the spring (906) and the sleeve rod (905) are both sleeved on the outside of the guide sliding rod (904).

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