Railway clearance detection device, including track detection vehicle and operation method of the device

Abstract

The present invention discloses a railway clearance detection device, including a line detection vehicle and an operation method of the device, wherein the device includes: an installation box arranged in the driver's cab of the line detection vehicle and located at the front end of the driver's cab; a detection module telescopically arranged in the installation box; a switch door on the front end of the driver's cab that can be movably connected at one end; a compression rod that can be movably connected to the switch door at one end and can be movably connected to the detection module at the other end. When the clearance detection device is in an operating state, the compression rod drives the switch door to open, and the detection module extends out of the installation box to the front end of the driver's cab. When the clearance detection device is in a non-operating state, the compression rod drives the switch door to close, and the detection module retracts into the installation box. The present invention can solve the technical problems that the existing detection device is inconvenient to operate, the degree of automation is not high, and the sealing and protection of the detection equipment cannot be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of railway engineering machinery, and in particular to a clearance detection device used for railway line detection operations, in particular railway tunnel inspection, including a line detection vehicle and an operation method of the device. Background Art

[0002] The limit refers to the outline dimension line that is not allowed to be exceeded for locomotives and vehicles and buildings and equipment close to the line in order to ensure the safety of locomotives and vehicles running on railway lines and prevent locomotives and vehicles from colliding with buildings and equipment on adjacent lines. Therefore, in the production process of rail vehicles, it is necessary to use a limit detection device to measure and verify the dimensions of the outline contour lines of buildings close to the line during the operation of the vehicle, so as to ensure that the surrounding working conditions of the vehicle can meet the national standards and the requirements of the contracting party, and prevent the vehicle from colliding and interfering with surrounding facilities when passing through bridges, tunnels or curves. At present, the installation of vehicle-mounted limit detection equipment is basically through a fixed mounting frame, installed at the front end of the driver's cab of the inspection vehicle, and the tunnel limit is detected as the vehicle runs. The detection equipment is exposed outside the vehicle for a long time and is easily damaged, which greatly shortens the service life of the equipment. And because the installation position is fixed, the detection function is easily limited when the field of view of the detection equipment is blocked.

[0003] In the prior art, the following technical solutions are mainly related to the present invention:

[0004] Prior art 1 is a Chinese invention application filed by Golden Eagle Heavy Engineering Machinery Co., Ltd. on December 8, 2015 and published on June 1, 2016, with publication number CN105620510A. The invention discloses a vehicle-mounted clearance detection equipment installation mechanism, including a telescopic slide, in which a telescopic rod that can slide along the telescopic slide is provided; an equipment mounting seat for mounting the clearance detection equipment is mounted on the telescopic rod; and also includes a cylinder for driving the equipment mounting seat to extend / retract. It also includes a slide seat for fixing the telescopic slide to the vehicle body. It also includes a cylinder mounting seat for fixing the cylinder to the vehicle body. The cylinder barrel is mounted on the vehicle body through the cylinder mounting seat, and the outer end of the cylinder piston rod is connected to the equipment mounting seat. The cylinder is connected by an air pipeline to provide power to push the clearance detection equipment out of the vehicle body to reach an operating state. The invention has an automatic retractable function, and the detection equipment can be hidden inside the vehicle body when not in use, which can well protect the detection equipment from wind and rain, extend the service life of the equipment, enhance the practicality and improve the aesthetics of the whole vehicle. However, the invention still has the following technical defects:

[0005] (1) The existing vehicle-mounted clearance detection equipment installation mechanism uses a cylinder to drive the inspection equipment to extend and retract. The motor drive is not stable during the movement, and the position accuracy control is not high;

[0006] (2) The existing vehicle-mounted clearance detection equipment installation mechanism uses a slideway and a slideway seat to guide the extension and retraction process, which has a high friction coefficient and reduces the output efficiency of the power equipment;

[0007] (3) The existing vehicle-mounted clearance detection equipment installation mechanism cannot realize automatic opening and closing of the door, has a low degree of automation, and cannot guarantee the sealing of the inspection equipment. Summary of the invention

[0008] In view of this, the purpose of the present invention is to provide a railway clearance detection device, including a track detection vehicle and an operation method of the device, so as to solve the technical problems that the existing detection device is inconvenient to operate, the degree of automation is not high, and the sealing and protection of the detection equipment cannot be guaranteed.

[0009] In order to achieve the above-mentioned invention object, the present invention specifically provides a technical implementation scheme of a railway clearance detection device, the railway clearance detection device comprising:

[0010] An installation box is arranged in the driver's cab of the track inspection vehicle and is located at the front end of the driver's cab;

[0011] A detection module telescopically disposed in the installation box;

[0012] One end is movably connected to a switch door on the front body of the driver's cab;

[0013] A compression rod having one end movably connected to the switch door and the other end movably connected to the detection module.

[0014] When the clearance detection device is in the operating state, the compression rod drives the switch door to open, and the detection module extends out of the installation box to the front end outside of the driver's cab.

[0015] When the limit detection device is in a non-operating state, the compression rod drives the switch door to close, and the detection module retracts into the installation box.

[0016] Furthermore, the installation box includes a box body and a box cover located on the top of the box body, and the box cover is hinged to the box body through a hinge. The front end of the box body is open for the detection module to extend out in the working state.

[0017] Furthermore, the detection module includes a mounting frame and a detection radar fixed on the mounting frame. The detection radar adopts a laser scanning structure to detect the tunnel surface size in real time and at high speed, and identify the tunnel surface defects.

[0018] Furthermore, the railway clearance detection device also includes a linear drive mechanism, one end of which is fixed in the box body, and the other end is connected to the mounting frame, and the linear drive mechanism is driven by a drive motor to realize telescopic movement.

[0019] Furthermore, a guide rail is arranged at the bottom of the box along the working direction, and a guide slider matched with the guide rail is arranged at the bottom of the mounting frame. The mounting frame can perform telescopic movement along the guide rail under the drive of the linear drive mechanism.

[0020] Furthermore, one end of the compression rod is hinged to the mounting frame, and the other end is hinged to the inner side of the switch door. The compression rod has a certain amount of compression under the action of external force, and can automatically restore to a free length after the external force is removed. One end of the switch door is movably fixed to the front end of the driver's cab through a hinge.

[0021] Furthermore, a travel handle is provided on the outer side of the side wall of the box body, and the travel handle is used to control the extension and retraction displacement of the detection module.

[0022] Furthermore, the drive motor is arranged in a box, a motor control module is also arranged in the box, and the travel handle, the control module and the drive motor are electrically connected through a wiring harness. The control module collects the operation instructions of the travel handle and controls the drive motor to realize forward or reverse rotation.

[0023] Furthermore, a mounting seat is provided on the box body, and the mounting box is fixedly mounted on a fixing seat inside the driver's cab through the mounting seat.

[0024] The present invention also specifically provides a technical implementation scheme of a track detection vehicle, which includes: a driver's cab, and the railway clearance detection device as described above.

[0025] The present invention further specifically provides a technical implementation scheme of the above-mentioned railway clearance detection device operation method, and the railway clearance detection device operation method comprises the following steps:

[0026] When the limit detection device is operating, the driving motor controls the thrust rod of the linear drive mechanism to extend, and the thrust rod of the linear drive mechanism extends and pushes the mounting frame to extend, and the guide slider cooperates with the guide rail to guide and position the movement process. The compression rod pushes the switch door to open toward the outside, and when the switch door is opened to the limited position and fixed, the mounting frame drives the detection radar to continue to extend. The compression rod is compressed under the action of the thrust, and freely extends in the early stage of the detection radar extension process, and is in a compressed state after reaching the set position. The mounting frame stops after extending to the specified position, and the detection radar extends to the front end of the driver's cab to perform detection operations.

[0027] Furthermore, the railway clearance detection device operation method further includes the following steps:

[0028] When the clearance detection device is not in operation, the drive motor controls the thrust rod of the linear drive mechanism to retract, and the thrust rod of the linear drive mechanism retracts and pulls the mounting frame to retract, and the guide slider cooperates with the guide rail to guide and position the movement process. The compression rod pulls the switch door toward the inside to close, and when the compression rod retracts to the set position, the external pressure of the compression rod is canceled and restored to the free length, and the mounting frame drives the detection radar to continue to retract. The compression rod pulls the switch door to close continuously, and when the mounting frame retracts to the specified position and stops, the compression rod pulls the switch door to close completely, and the detection radar retracts into the box located in the driver's cab.

[0029] Furthermore, the extension or retraction displacement of the detection module is controlled by an operator in the driver's cab through a travel handle installed on the outside of the box, so as to realize the start and stop of the detection radar at any position within the travel of the linear drive mechanism.

[0030] By implementing the railway clearance detection device provided by the present invention, including the technical solution of the track detection vehicle and the operation method of the device, the following beneficial effects are achieved:

[0031] (1) The railway clearance detection device of the present invention includes a track detection vehicle and an operation method of the device, wherein the detection module can be automatically extended and retracted, extending when in operation and retracting when not in operation, and is easy to operate and highly automated, which is beneficial to the protection of the detection module and can fully ensure the sealing of the detection module;

[0032] (2) The railway clearance detection device of the present invention includes a line detection vehicle and an operation method of the device, wherein the detection module is integrated into a box body, and the extension and retraction of the detection module is coordinated by a slider and a guide rail, which has a low friction coefficient and can realize independent control and independent operation. The operation is convenient and simple, which is conducive to the design layout of the whole vehicle and the application of product promotion;

[0033] (3) The railway clearance detection device of the present invention includes a track detection vehicle and an operation method of the device. The position adjustment of the detection module is flexible and convenient, which can meet the detection requirements under different working conditions. The motor is used to control the linear drive mechanism to drive the inspection equipment to extend and retract. The movement process is stable and the position control accuracy is high.

[0034] (4) The railway clearance detection device of the present invention includes a track detection vehicle and an operation method of the device, and is provided with an automatic opening and closing door. The detection module drives the opening and closing door to open automatically when it is extended, and drives the opening and closing door to close automatically when it is retracted. This can protect the interior of the vehicle and improve the aesthetics of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other embodiments can be obtained based on these drawings without creative work.

[0036] Figure 1 It is a structural schematic diagram of a specific embodiment of the railway clearance detection device of the present invention in a retracted state;

[0037] Figure 2 It is a structural schematic diagram of a specific embodiment of the railway clearance detection device of the present invention in an extended state;

[0038] Figure 3 It is a top view of the internal structure of a specific embodiment of the railway clearance detection device of the present invention;

[0039] Figure 4 It is a side view of the internal structure of a specific embodiment of the railway clearance detection device of the present invention;

[0040] Figure 5 It is a front structural schematic diagram of a specific embodiment of the track inspection vehicle of the present invention in an operating state;

[0041] Figure 6 It is a side structural schematic diagram of a specific embodiment of the track inspection vehicle of the present invention in an operating state;

[0042] Figure 7 It is a schematic diagram of the side structure of a specific embodiment of the track inspection vehicle of the present invention in a non-operating state;

[0043] In the figure: 1-limit detection device, 2-installation box, 3-detection module, 4-compression rod, 5-switch door, 6-box body, 7-box cover, 8-mounting seat, 9-detection radar, 10-mounting frame, 11-travel handle, 12-guide slide rail, 13-linear drive mechanism, 14-motor control module, 15-drive motor, 16-guide slide block, 17-driver's cab, 18-fixed seat, 19-hinge, 20-line detection vehicle. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] As attached Figure 1 To Attachment Figure 7 As shown, a specific embodiment of the railway clearance detection device of the present invention, including a track detection vehicle and an operation method of the device is given. The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] Example 1

[0047] As attached Figure 1 To Attachment Figure 7 As shown, an embodiment of a railway clearance detection device 1 of the present invention specifically includes:

[0048] An installation box 2 is arranged in the driver's cab 17 of the track inspection vehicle 20 and is located at the front end of the driver's cab 17;

[0049] A detection module 3 is telescopically arranged in the installation box 2;

[0050] One end is movably connected to a switch door 5 on the front end of the driver's cab 17;

[0051] A compression rod 4 is movably connected to the switch door 5 at one end and movably connected to the detection module 3 at the other end.

[0052] As attached Figure 6 As shown, when the clearance detection device 1 is in the operating state, the compression rod 4 drives the switch door 5 to open, and the detection module 3 extends out of the installation box 2 to the front end outside of the driver's cab 17.

[0053] As attached Figure 7 As shown, when the clearance detection device 1 is in a non-operating state, the compression rod 4 drives the switch door 5 to close, and the detection module 3 retracts into the installation box 2.

[0054] Embodiment 1 of the present invention provides a novel limit detection device 1, through which the detection module 3 can be extended out of the vehicle when in operation and retracted into the driver's cab 17 when not in operation, which can provide good protection for the detection module 3. At the same time, the extension amount of the detection module 3 can be freely controlled according to the detection requirements to avoid limiting the detection function. The switch door 5 provided on the vehicle body automatically opens when the detection module 3 is extended, and automatically closes when the detection module 3 is retracted, which can provide waterproof and dustproof effects on the interior of the vehicle body. The detection module 3 is integrated into the box 6 and can be independently controlled, which is beneficial to the installation layout of the entire vehicle.

[0055] As attached Figure 1 and attached Figure 2As shown, the installation box 2 further includes a box body 6 and a box cover 7 located on the top of the box body 6. The box cover 7 is hinged to the box body 6 through a hinge 19. The box cover 7 is used to ensure the sealing of the equipment in the box body 6. The front end of the box body 6 is open so that the detection module 3 can extend in the working state. The hinge 19 is welded to the box cover 7 and fixed to the box body 6 by bolts. The box cover 7 can be opened or closed around the hinge 19, which protects the internal detection equipment and facilitates the maintenance of the internal equipment.

[0056] The detection module 3 further includes a mounting frame 10, and a detection radar 9 fixed on the mounting frame 10. The detection radar 9 is fixed on the mounting frame 10 by bolts, and the detection radar 9 adopts a laser scanning structure to detect the surface size of the tunnel in real time and at high speed, and identify the surface defects of the tunnel.

[0057] The railway clearance detection device 1 also includes a linear drive mechanism 13, one end of which is fixed to the box body 6 by bolts, and the other end is connected to the mounting frame 10, and a drive motor 15 is used in conjunction with the linear drive mechanism 13. The box body 6 is provided with a drive motor 15, and the linear drive mechanism 13 is driven by the drive motor 15 to realize telescopic movement. As a typical specific embodiment of the present invention, the linear drive mechanism 13 specifically adopts a linear electric cylinder, and the compression rod 4 specifically adopts an air compression rod or a hydraulic rod. The bottom of the box body 6 is along the working direction (such as the attached Figure 1 To Attachment Figure 4 A guide rail 12 is provided at the bottom of the mounting frame 10 (in the direction shown by L in the figure), and a guide slider 16 matched with the guide rail 12 is provided at the bottom of the mounting frame 10. Driven by the linear drive mechanism 13, the mounting frame 10 can perform telescopic movement along the guide rail 12. The guide rail 12 is fixed to the bottom of the box body 6 by bolts, and there are two guide sliders 12 in total. Four guide sliders 16 are fixed to the bottom of the mounting frame 10 by bolts. The guide slider 16 is used in conjunction with the guide rail 12. Each guide rail 12 is matched with two guide sliders 16. The mounting frame 10 is connected to the thrust rod of the linear drive mechanism 13 by bolts.

[0058] One end of the compression rod 4 is hinged to the mounting frame 10, and the other end is hinged to the inner side of the switch door 5. The compression rod 4 has a certain amount of compression under the action of external force, and can automatically restore to a free length after the external force is removed. One end of the switch door 5 is movably fixed to the front end of the driver's cab 17 by a hinge. The switch door 5 is fixed to the front end of the driver's cab 17 by a hinge, and can be opened and closed freely.

[0059] A travel handle 11 is provided on the outer side of the side wall of the box body 6, and the travel handle 11 is used to control the extension and retraction displacement of the detection module 3. The travel handle 11 is installed on the side of the box body 6, and the operator can operate it in the vehicle, and can flexibly control the extension and retraction displacement of the detection module 3 without getting off the vehicle. A motor control module 14 is also provided in the box body 6, and the motor control module 14 is fixed to the inner side of the side wall of the box body 6 by bolts. The travel handle 11, the control module 14 and the drive motor 15 are electrically connected through a wiring harness, and the control module 14 collects the operation instructions of the travel handle 11 and controls the drive motor 15 to realize forward or reverse rotation.

[0060] The box body 6 is provided with a mounting seat 8, and the mounting box 2 is fixedly mounted on a fixing seat 18 inside the driver's cab 17 through the mounting seat 8. The box body 6 is welded with a mounting seat 8, and the mounting seat 8 is connected to the fixing seat 18 provided in the driver's cab 17 by bolts for installation and fixation of the device.

[0061] Example 2

[0062] As attached Figure 5 As shown, an embodiment of a track detection vehicle 20 of the present invention specifically comprises: a driver's cab 17, and the railway clearance detection device 1 as described in Example 1, the railway clearance detection device 1 is installed at the front end of the driver's cab 17 of the track detection vehicle 20. When the clearance detection device 1 is in the operating state, the compression rod 4 drives the switch door 5 to open, and the detection module 3 extends out of the installation box 2 to the front end of the driver's cab 17. When the clearance detection device 1 is in the non-operating state, the compression rod 4 drives the switch door 5 to close, and the detection module 3 retracts into the installation box 2.

[0063] Example 3

[0064] As attached Figure 6 As shown, an embodiment of the operation method of the railway clearance detection device of the present invention as described in Example 1, when the clearance detection device 1 is in operation, the detection radar 9 extends to the front end of the driver's cab 17 to detect the railway line clearance, specifically including the following steps:

[0065] The driving motor 15 controls the thrust rod of the linear drive mechanism 13 to extend, and the thrust rod of the linear drive mechanism 13 extends and pushes the mounting frame 10 to extend. The guide slider 16 cooperates with the guide rail 12 to guide and position the movement process. The compression rod 4 pushes the switch door 5 to open toward the outside. When the switch door 5 is opened to a limited position and fixed, the mounting frame 10 drives the detection radar 9 to continue to extend. The compression rod 4 is compressed under the action of the thrust, and freely extends in the early stage of the extension process of the detection radar 9, and is in a compressed state after reaching the set position. The mounting frame 10 stops after extending to the specified position, and the detection radar 9 extends to the front end of the driver's cab 17 to perform detection operations.

[0066] As attached Figure 7 As shown, the operation method of the railway clearance detection device, when the clearance detection device 1 is not in operation, the detection radar 9 is retracted into the box 6 located in the driver's cab 17, specifically comprising the following steps:

[0067] The driving motor 15 controls the thrust rod of the linear drive mechanism 13 to retract, and the thrust rod of the linear drive mechanism 13 retracts and pulls the mounting frame 10 to retract. The guide slider 16 cooperates with the guide rail 12 to guide and position the movement process. The compression rod 4 pulls the switch door 5 toward the inside to close. When the compression rod 4 retracts to the set position, the external pressure of the compression rod 4 is canceled and restored to the free length, and the mounting frame 10 drives the detection radar 9 to continue to retract. The compression rod 4 pulls the switch door 5 to close continuously, and when the mounting frame 10 retracts to the specified position and stops, the compression rod 4 pulls the switch door 5 to close completely, and the detection radar 9 retracts to the box 6 located in the driver's cab 17.

[0068] The extension or retraction displacement of the detection module 3 is controlled by the operator in the driver's cab 17 through the travel handle 11 installed on the outside of the box 6, so as to realize the start and stop of the detection radar 9 at any position within the travel of the linear drive mechanism 13.

[0069] In the description of this application, it should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0070] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0072] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0073] By implementing the railway clearance detection device described in the specific embodiment of the present invention, including the technical solution of the track detection vehicle and the operation method of the device, the following technical effects can be produced:

[0074] (1) The railway clearance detection device described in the specific embodiment of the present invention includes a track detection vehicle and an operation method of the device. The detection module can be automatically extended and retracted, extending when in operation and retracting when not in operation. The operation is convenient and the degree of automation is high. It is beneficial to the protection of the detection module and can fully ensure the sealing of the detection module.

[0075] (2) The railway clearance detection device described in the specific embodiment of the present invention includes a track detection vehicle and an operation method of the device, wherein the detection module is integrated into the box body, and the extension and retraction of the detection module is achieved by using a slider and a guide rail, which has a low friction coefficient and can be independently controlled and operated. The operation is convenient and simple, which is conducive to the design layout of the whole vehicle and the application of product promotion;

[0076] (3) The railway clearance detection device described in the specific embodiment of the present invention includes a track detection vehicle and an operation method of the device. The position adjustment of the detection module is flexible and convenient, which can meet the detection requirements under different working conditions. The electric cylinder is used to drive the inspection equipment to extend and retract. The motor drive is stable during the movement, and the position control accuracy is high.

[0077] (4) The railway clearance detection device described in the specific embodiment of the present invention includes a track detection vehicle and an operation method of the device, and is provided with an automatic opening and closing door. The detection module drives the opening and closing door to open automatically when it is extended, and drives the opening and closing door to close automatically when it is retracted. This can protect the interior of the vehicle and improve the aesthetics of the entire vehicle.

[0078] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0079] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above in the preferred embodiment, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A railway clearance detection device, characterized in that: include: An installation box (2) disposed in a driver's cab (17) of a track inspection vehicle (20) and located at the front end of the driver's cab (17); A detection module (3) telescopically arranged in the installation box (2); One end of the switch door (5) is movably connected to the front end of the driver's cab (17); A compression rod (4) having one end movably connected to the switch door (5) and the other end movably connected to the detection module (3); When the clearance detection device (1) is in an operating state, the compression rod (4) drives the switch door (5) to open, and the detection module (3) extends out of the installation box (2) to the front end of the driver's cab (17); When the clearance detection device (1) is in a non-operating state, the compression rod (4) drives the switch door (5) to close, and the detection module (3) retracts into the installation box (2); The installation box (2) comprises a box body (6) and a box cover (7) located on the top of the box body (6), wherein the box cover (7) is hingedly connected to the box body (6) via a hinge (19); the front end of the box body (6) is open so that the detection module (3) can be extended in an operating state; The device further comprises a linear drive mechanism (13), one end of the linear drive mechanism (13) being fixed in the box body (6), and the other end of the linear drive mechanism (13) being connected to the mounting frame (10), and the linear drive mechanism (13) being driven by a drive motor (15) to achieve telescopic movement; A guide rail (12) is provided at the bottom of the box (6) along the working direction, and a guide slider (16) matching the guide rail (12) is provided at the bottom of the mounting frame (10); the mounting frame (10) can be driven by the linear drive mechanism (13) to perform telescopic movement along the guide rail (12); One end of the compression rod (4) is hinged to the mounting frame (10), and the other end is hinged to the inner side of the switch door (5); the compression rod (4) has a certain amount of compression under the action of an external force, and can automatically restore to a free length after the external force is removed; one end of the switch door (5) is movably fixed to the front end of the driver's cab (17) through a hinge.

2. The railway clearance detection device according to claim 1, characterized in that: The detection module (3) comprises a mounting frame (10) and a detection radar (9) fixed on the mounting frame (10); the detection radar (9) adopts a laser scanning structure to detect the surface dimensions of the tunnel in real time and at high speed, and to identify defects on the tunnel surface.

3. The railway clearance detection device according to claim 1 or 2, characterized in that: A travel handle (11) is provided on the outer side of the side wall of the box body (6), and the travel handle (11) is used to control the extension and retraction displacement of the detection module (3).

4. The railway clearance detection device according to claim 3, characterized in that: The drive motor (15) is arranged in a box (6), and a motor control module (14) is also arranged in the box (6). The travel handle (11), the control module (14) and the drive motor (15) are electrically connected via a wiring harness; the control module (14) collects operating instructions of the travel handle (11) and controls the drive motor (15) to achieve forward or reverse rotation.

5. The railway clearance detection device according to claim 1, 2 or 4, characterized in that: The box body (6) is provided with a mounting seat (8), and the mounting box (2) is fixedly mounted on a fixing seat (18) inside the driver's cab (17) via the mounting seat (8).

6. A line inspection vehicle, characterized in that: include: A driver's cab (17), and a railway clearance detection device (1) as claimed in any one of claims 1 to 5.

7. An operating method of the railway clearance detection device according to any one of claims 1 to 5, characterized in that: The following steps are involved: When the limit detection device (1) is in operation, the drive motor (15) controls the thrust rod of the linear drive mechanism (13) to extend, and the thrust rod of the linear drive mechanism (13) extends and pushes the mounting frame (10) to extend, and the guide slider (16) cooperates with the guide slide rail (12) to guide and position the movement process; the compression rod (4) pushes the switch door (5) to open toward the outside, and when the switch door (5) is opened to a limited position and fixed, the mounting frame (10) drives the detection radar (9) to continue to extend; the compression rod (4) is compressed under the action of the thrust, and freely extends in the early stage of the extension process of the detection radar (9), and is in a compressed state after reaching the set position; the mounting frame (10) stops after extending to a specified position, and the detection radar (9) extends to the front end of the driver's cab (17) to perform detection operations.

8. The railway clearance detection device operation method according to claim 7, characterized in that: The following steps are also included: When the limit detection device (1) is not in operation, the drive motor (15) controls the thrust rod of the linear drive mechanism (13) to retract, the thrust rod of the linear drive mechanism (13) retracts and pulls the mounting frame (10) to retract, and the guide slider (16) cooperates with the guide slide rail (12) to guide and position the movement process; the compression rod (4) pulls the switch door (5) toward the inside to close, and when the compression rod (4) retracts to a set position, the external pressure of the compression rod (4) is canceled and restored to a free length, and the mounting frame (10) drives the detection radar (9) to continue to retract; the compression rod (4) pulls the switch door (5) to continue to close, and when the mounting frame (10) retracts to a specified position and stops, the compression rod (4) pulls the switch door (5) to completely close, and the detection radar (9) retracts into a box (6) located in the driver's cab (17).

9. The operating method of the railway clearance detection device according to claim 7 or 8, characterized in that: The extension or retraction displacement of the detection module (3) is controlled by an operator in a driver's cab (17) via a travel handle (11) installed on the outside of the box (6), so as to realize the start and stop of the detection radar (9) at any position within the travel of the linear drive mechanism (13).

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