A vehicle-mounted rapid crack detection device for tunnel maintenance

Abstract

The present invention relates to the technical field of tunnel crack detection, and in particular to a vehicle-mounted rapid crack detection device for tunnel maintenance. The vehicle-mounted rapid crack detection device for tunnel maintenance comprises a machine base, a base plate is arranged on the machine base, the base plate can move in a vertical direction and can rotate, a first elastic telescopic rod is arranged on the base plate, the first elastic telescopic rod extends in a radial direction of the base plate, an end of the first elastic telescopic rod away from the base plate is hinged with a hinge block, a detection head and an annular spacer are arranged on the hinge block, the annular spacer forms a closed moving loop on the detection head, the annular spacer is sleeved on the outside of the detection head, and when in use, the inner belt surface of the same belt-shaped part contacts the detection head, and the outer belt surface contacts the inner wall of the tunnel, so that on the one hand, the detection head can not directly contact the inner wall of the tunnel, effectively avoiding jamming or wear, and on the other hand, the annular spacer can fit on the inner wall of the tunnel, so that the detection head can fit on the inner wall of the tunnel.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel crack detection, and in particular to a vehicle-mounted rapid crack detection device for tunnel maintenance. Background Art

[0002] A tunnel is an underground passage used to transport people, goods and vehicles.

[0003] During the long-term use of tunnels, they will be affected by factors such as temperature changes, vehicle overloading and traffic accidents, which may lead to various defects. Cracks are the most common engineering defects. The generation of tunnel cracks involves many factors, including stress and deformation, temperature difference and humidity, construction quality, geological factors, design factors, material shrinkage and expansion, and external environmental factors.

[0004] In order to ensure the safe use of the tunnel, it is necessary to regularly inspect the cracks in the tunnel. During the inspection process, inspection equipment is needed. In the related technology, for example, Chinese patent application CN110243940A discloses an inspection vehicle that can automatically inspect railway tunnels. The inspection vehicle that can automatically inspect railway tunnels detects cracks in the railway tunnel through a detection probe, and controls the correspondingly connected rotating motor, drive motor, linear motor and piston telescopic rod through a microcontroller, and adjusts the position of the detection probe to perform close-range inspection of the cracks.

[0005] Although the above-mentioned inspection vehicle capable of automatically inspecting railway tunnels can detect tunnel cracks, it is found in the actual inspection process that, on the one hand, the detection probe cannot completely fit the inner wall of the tunnel, which affects the accuracy of the detection results; on the other hand, when switching the position of the detection probe, multiple mechanisms need to be linked, which is cumbersome to operate. Summary of the invention

[0006] Based on this, it is necessary to provide a vehicle-mounted rapid crack detection device for tunnel maintenance to address the problems of low accuracy and cumbersome operation in the current tunnel crack detection process.

[0007] The above purpose is achieved through the following technical solutions:

[0008] A vehicle-mounted rapid crack detection device for tunnel maintenance, the vehicle-mounted rapid crack detection device for tunnel maintenance comprising a machine base, a base plate being arranged on the machine base, the base plate being capable of both vertical movement and rotation, a first elastic telescopic rod being arranged on the base plate, the first elastic telescopic rod extending in the radial direction of the base plate, an end of the first elastic telescopic rod away from the base plate being hingedly connected to a hinge block, a detection head and an annular spacer band being arranged on the hinge block, the annular spacer band being arranged as an elastic structure, and a closed moving loop being formed on the detection head, the annular spacer band being sleeved on the outside of the detection head, and when in use, the inner belt surface of the same belt-shaped portion contacts the detection head, and the outer belt surface contacts the inner wall of the tunnel.

[0009] Furthermore, the vehicle-mounted rapid crack detection device for tunnel maintenance also includes a tensioning mechanism, and the tensioning mechanism is used to tension the annular barrier belt.

[0010] Furthermore, the tensioning mechanism includes a second elastic telescopic rod and a third elastic telescopic rod, one end of the second elastic telescopic rod is hinged on the hinge block, and the other end is pushed on the inner belt surface of the annular partition when in use. There are two second elastic telescopic rods, and the two second elastic telescopic rods are symmetrically arranged about the detection head; the two ends of the third elastic telescopic rod are respectively hinged on the two second elastic telescopic rods, and are configured to be able to spread out the two second elastic telescopic rods.

[0011] Furthermore, the tensioning mechanism also includes two rotating wheels, which are sleeved on the end of the second elastic telescopic rod away from the hinge block and can rotate on their own. When in use, the rotating wheels push against the inner belt surface of the annular spacer belt.

[0012] Furthermore, the tensioning mechanism further comprises a slide groove and a slide protrusion, wherein the slide groove is provided on the detection head; the slide protrusion is fixedly arranged on the third elastic telescopic rod and is slidably inserted into the slide groove.

[0013] Furthermore, there are two third elastic telescopic rods, which are symmetrically arranged with respect to the detection head.

[0014] Furthermore, the tensioning mechanism also includes an elastic telescopic block, which is arranged on the hinge block and opposite to the detection head. When in use, the elastic telescopic block pushes against the inner belt surface of the annular partition belt.

[0015] Furthermore, the vehicle-mounted rapid crack detection device for tunnel maintenance also includes a lifting mechanism, and the lifting mechanism is configured to provide a driving force for the base plate to move in a vertical direction.

[0016] Furthermore, the vehicle-mounted rapid crack detection device for tunnel maintenance also includes a driving mechanism, and the driving mechanism is configured to provide a driving force for the rotation of the base plate.

[0017] Furthermore, four wheels are arranged at the bottom of the base.

[0018] The beneficial effects of the present invention are:

[0019] When using a vehicle-mounted rapid crack detection device for tunnel maintenance provided by the present invention, the machine base is first moved to the area to be tested in the tunnel, and then the base plate is driven to move in the vertical direction. When the annular partition is in contact with the inner wall of the tunnel, as the base plate moves, the hinge block rotates under the push of the inner wall of the tunnel and the elastic push of the first elastic telescopic rod. The hinge block synchronously drives the detection head to rotate to be set perpendicular to the tangent of the inner wall of the tunnel, so that the ultrasonic wave emitted by the detection head can be vertically captured, which is beneficial to reduce the scattering and attenuation of the ultrasonic wave, thereby improving the detection sensitivity. At the same time, the annular partition is located in a strip-shaped manner between the detection head and the inner wall of the tunnel. Part of it undergoes elastic deformation synchronously to fit against the inner wall of the tunnel. On the one hand, it prevents the detection head from directly contacting the inner wall of the tunnel, effectively avoiding jamming or wear. On the other hand, it can not only effectively reduce the air gap so that the ultrasonic wave can penetrate into the inner wall of the tunnel more effectively, but also can use the annular spacer to drive the detection head to better fit against the inner wall of the tunnel, thereby improving the accuracy of the detection result. Then the detection head is started to detect cracks on the inner wall of the tunnel. After the detection is completed, the base plate is driven to rotate, and the detection head synchronously follows the revolution, while the annular spacer is rotated to realize the switching of the detection position. The operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a vehicle-mounted rapid crack detection device for tunnel maintenance provided by an embodiment of the present invention;

[0021] Figure 2 A schematic front view of the structure of a vehicle-mounted rapid crack detection device for tunnel maintenance provided by an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the three-dimensional structure of a vehicle-mounted rapid crack detection device for tunnel maintenance without a machine base, a base plate and a lifting mechanism provided in one embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the three-dimensional structure of a detection mechanism of a vehicle-mounted rapid crack detection device for tunnel maintenance without a machine base, a base plate, a lifting mechanism and an annular spacer provided in one embodiment of the present invention.

[0024] in:

[0025] 1. Machine base; 11. Bracket; 12. Moving platform; 13. Wheels;

[0026] 2. Base plate;

[0027] 3. A first elastic telescopic rod;

[0028] 4. Articulated block;

[0029] 5. Detection head; 501. Sink;

[0030] 6. Annular spacer;

[0031] 71. second elastic telescopic rod; 72. third elastic telescopic rod; 73. rotating wheel; 74. slide slot; 75. elastic telescopic block;

[0032] 8. Driving mechanism; 81. Driving motor; 82. Gear; 83. Ring gear. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] like Figures 1 to 4As shown in the figure, a crack rapid detection device for on-vehicle tunnel maintenance provided by an embodiment of the present invention is used to detect tunnel cracks, and is set to include a machine base 1. A base plate 2 is arranged on the machine base 1. The base plate 2 can move in the vertical direction and can also rotate. A first elastic telescopic rod 3 is arranged on the base plate 2. The first elastic telescopic rod 3 extends along the radial direction of the base plate 2. One end of the first elastic telescopic rod 3 away from the base plate 2 is hinged with a hinge block 4. A detection head 5 and an annular spacer 6 are arranged on the hinge block 4. The annular spacer 6 is set as an elastic structure, and a closed moving circuit is formed on the detection head 5. The annular spacer 6 is sleeved outside the detection head 5, and in use, the inner belt surface of the same belt part contacts the detection head 5, and the outer belt surface contacts the tunnel inner wall.

[0037] Specifically in this embodiment, as Figure 1 shown, the machine base 1 is set as a flat plate structure and is horizontally arranged in use; the base plate 2 is set as a disc structure and its axis is horizontally arranged in use; to facilitate driving the base plate 2 to move in the vertical direction, a box structure is arranged at the top of the machine base 1, and a moving platform 12 is covered on the top of the box structure. The moving platform 12 is set as a flat plate structure and is horizontally arranged in use. The moving platform 12 can move in the vertical direction; to facilitate the installation of the base plate 2, an inverted V-shaped bracket 11 is fixedly connected to the top of the moving platform 12 by bolts. The bracket 11 is set as a split structure fixedly connected by bolts. The base plate 2 is rotatably installed on the top of the small end of the bracket 11 and is connected to the bracket 11 through a bearing.

[0038] As Figure 1 and Figure 3 shown, the first elastic telescopic rod 3 is set to have a first fixed section and a first moving section. The first fixed section is set as a "C"-shaped strip structure, and when installed, the opening faces the base plate 2, is clamped on both side plates of the base plate 2, and is fixedly connected to the base plate 2 by bolts. The first moving section is set as a straight rod structure, and when installed, one end is slidably inserted into the end of the first fixed section away from the base plate 2 and is connected to the first fixed section through a first compression spring, and the other end is suspended.

[0039] As Figure 3 shown, the hinge block 4 is set as a T-shaped block structure and has a horizontal section and a vertical section connected vertically. One end of the vertical section away from the horizontal section is hinged to the suspended end of the first moving section during installation; the detection head 5 is set as a columnar structure and is vertically arranged on the top of the horizontal section of the hinge block 4 during installation; the annular spacer 6 can be made of an elastic hard material such as first-grade strip steel or aluminum alloy.

[0040] To prevent the annular spacer 6 from falling off, as Figure 4As shown, two sink grooves 501 are symmetrically arranged on the top circumferential side wall of the detection head 5, and the sink groove 501 is arranged as an arc structure. Two sliding bars (not shown) are symmetrically and fixedly arranged on the inner band surface of the annular partition band 6. The sliding bar is arranged as an annular structure and is arranged parallel to the annular partition band 6. The two sliding bars are clamped on both sides of the detection head 5 during installation, and are slidably inserted into the sink grooves 501 respectively.

[0041] When in use, first move the machine base 1 to the area to be tested in the tunnel, and then drive the base plate 2 to move in the vertical direction. When the annular partition 6 contacts the inner wall of the tunnel, as the base plate 2 moves, the hinge block 4 rotates under the push of the inner wall of the tunnel and the elastic push of the first elastic telescopic rod 3. The hinge block 4 simultaneously drives the detection head 5 to rotate to a perpendicular setting to the tangent of the inner wall of the tunnel, so that the ultrasonic wave emitted by the detection head 5 can be vertically captured, which is beneficial to reduce the scattering and attenuation of the ultrasonic wave, thereby improving the detection sensitivity. At the same time, the band-shaped part of the annular partition 6 located between the detection head 5 and the inner wall of the tunnel is elastically deformed synchronously. It is fitted on the inner wall of the tunnel. On the one hand, the detection head 5 does not directly contact the inner wall of the tunnel, effectively avoiding jamming or wear. On the other hand, it can not only effectively reduce the air gap, so that the ultrasonic wave can more effectively penetrate into the inner wall of the tunnel, but also can use the annular spacer 6 to drive the detection head 5 to better fit on the inner wall of the tunnel, thereby improving the accuracy of the detection result. Then the detection head 5 is started to detect cracks on the inner wall of the tunnel; after the detection is completed, the base plate 2 is driven to rotate, and the detection head 5 follows the revolution synchronously, and at the same time the annular spacer 6 is rotated to realize the switching of the detection position, which is simple to operate.

[0042] In some embodiments, in order to avoid the loosening of the annular spacer 6 affecting the effect of fitting the detection head 5 , the vehicle-mounted rapid crack detection device for tunnel maintenance is configured to also include a tensioning mechanism, which is used to tension the annular spacer 6 .

[0043] In a further embodiment, the tensioning mechanism is configured to include a second elastic telescopic rod 71 and a third elastic telescopic rod 72, one end of the second elastic telescopic rod 71 is hinged on the hinge block 4, and the other end is pushed on the inner belt surface of the annular partition band 6 when in use. There are two second elastic telescopic rods 71, and the two second elastic telescopic rods 71 ​​are symmetrically arranged about the detection head 5; the two ends of the third elastic telescopic rod 72 are respectively hinged on the two second elastic telescopic rods 71, and are configured to be able to spread out the two second elastic telescopic rods 71.

[0044] Specifically in this embodiment, Figure 3As shown, the second elastic telescopic rod 71 is configured to have a second fixed section and a second movable section, wherein the second fixed section is hinged to the end of the horizontal section of the hinge block 4 at one end away from the second movable section during installation; the second movable section is configured to be a straight rod-shaped structure, and one end is slidably inserted into the end of the second fixed section away from the hinge block 4 at one end during installation, and is connected to the second fixed section by a second compression spring, and the other end is suspended. Under the action of the second compression spring, the second movable section has a tendency to extend, so that it can be pushed on the inner belt surface of the annular spacer 6 to support and tension the annular spacer 6; the third elastic telescopic rod 72 is configured to have a third fixed section and two third movable sections, the third movable section is configured to be a straight rod-shaped structure, the two third movable sections are symmetrically and slidably inserted into the two ends of the third fixed section during installation, the two third movable sections are connected by a third compression spring, and the suspended ends of the two third movable ends are respectively hinged on the second fixed section, and under the action of the third compression spring, the third movable section has a tendency to extend, so that it can both support the two second elastic telescopic rods 71 ​​and open the two second elastic telescopic rods 71 ​​to ensure the tensioning effect.

[0045] In a further embodiment, in order to avoid wear on the annular spacer 6 caused by sliding friction between the second elastic telescopic rod 71 and the annular spacer 6, the tensioning mechanism is configured to also include two rotating wheels 73, which are sleeved on the end of the second elastic telescopic rod 71 away from the hinge block 4 and can rotate on their own. The rotating wheels 73 are pushed against the inner belt surface of the annular spacer 6 when in use.

[0046] Specifically in this embodiment, Figure 3 As shown, the rotating wheel 73 is connected to the suspended end of the second movable section of the second elastic telescopic rod 71 during installation, so that there is rolling friction between the second elastic telescopic rod 71 and the annular spacer 6, thereby reducing the wear of the annular spacer 6 and ensuring the tensioning effect of the annular spacer 6.

[0047] In other embodiments, in order to further improve the stability when the third elastic telescopic rod 72 opens the two second elastic telescopic rods 71, the tensioning mechanism is configured to also include a slide groove 74 and a sliding protrusion, and the slide groove 74 is opened on the detection head 5; the sliding protrusion is fixedly arranged on the third elastic telescopic rod 72 and is slidably inserted in the slide groove 74.

[0048] Specifically in this embodiment, Figure 3 As shown, the slide groove 74 is arranged as a strip structure and is arranged parallel to the axis of the detection head 5; the sliding protrusion is fixedly arranged on the outer wall surface of the third fixed section of the third elastic telescopic rod 72 facing the detection head 5, and is slidably inserted into the slide groove 74 during installation, so that the third fixed section has a certain moving direction, thereby being able to better open the two second elastic telescopic rods 71.

[0049] In other embodiments, in order to further improve the stability when the third elastic telescopic rod 72 opens the two second elastic telescopic rods 71 ​​, the number of the third elastic telescopic rods 72 may be two and they may be symmetrically arranged about the detection head 5 .

[0050] Specifically in this embodiment, the two third elastic telescopic rods 72 are symmetrically arranged on both sides of the detection head 5, so that the second fixed section of the second elastic telescopic rod 71 can be evenly opened under force.

[0051] In other embodiments, the tensioning mechanism is configured to also include an elastic telescopic block 75, which is arranged on the hinge block 4 and opposite to the detection head 5. The elastic telescopic block 75 is pushed against the inner belt surface of the annular spacer belt 6 when in use.

[0052] Specifically in this embodiment, Figure 3 As shown, the elastic telescopic block 75 is inserted into the hinge block 4 during installation. The elastic telescopic block 75 is configured to have a fourth fixed section and a fourth movable section. The fourth fixed section is fixed on the hinge block 4 during installation. The fourth movable section is slidably inserted on the fourth fixed section during installation, and is connected to the fourth fixed section through a fourth compression spring. Under the action of the fourth compression spring, the fourth movable section has a tendency to extend, so that it can be pushed on the inner band surface of the annular spacer band 6 to support and tension the annular spacer band 6.

[0053] In other embodiments, the vehicle-mounted rapid crack detection device for tunnel maintenance is configured to further include a lifting mechanism, and the lifting mechanism is configured to provide a driving force for the base plate 2 to move in the vertical direction.

[0054] Specifically in this embodiment, the lifting mechanism can adopt the existing double-scissor electric lifting mechanism. The double-scissor electric lifting mechanism is inserted into the box structure of the base 1 during installation, and the lifting end is fixedly arranged at the bottom of the moving platform 12, so as to drive the base plate 2 to move in the vertical direction through the moving platform 12.

[0055] More specifically, the double-scissor-type electric lifting mechanism can be configured to include a scissor arm group and a hydraulic system, wherein the scissor arm group is usually composed of two or more groups of hingedly connected scissor arms, and these scissor arms are driven by the hydraulic system to achieve the lifting movement of the mobile platform 12.

[0056] In other embodiments, the vehicle-mounted rapid crack detection device for tunnel maintenance is configured to further include a driving mechanism 8, and the driving mechanism 8 is configured to provide a driving force for the base plate 2 to rotate.

[0057] Specifically in this embodiment, the driving mechanism 8 is configured to include a driving motor 81, a gear 82 and a ring gear 83. Figure 1As shown, the driving motor 81 is fixed on the top of the moving platform 12 during installation; the gear 82 is fixedly sleeved on the motor shaft of the driving motor 81; the ring gear 83 is fixedly arranged on the circumferential side wall of the base plate 2 and meshes with the gear 82.

[0058] When in use, the driving motor 81 is started, and the driving motor 81 drives the base plate 2 to rotate through the meshing between the gear 82 and the ring gear 83 .

[0059] In other embodiments, in order to improve the mobility of the vehicle-mounted rapid crack detection device for tunnel maintenance, four wheels 13 are provided at the bottom of the base 1 .

[0060] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A vehicle-mounted rapid crack detection device for tunnel maintenance, characterized in that: The vehicle-mounted rapid crack detection device for tunnel maintenance comprises a machine base, a base plate is arranged on the machine base, the base plate can move in the vertical direction and can rotate, a first elastic telescopic rod is arranged on the base plate, the first elastic telescopic rod extends in the radial direction of the base plate, an end of the first elastic telescopic rod away from the base plate is hinged with a hinge block, a detection head and an annular spacer are arranged on the hinge block, the annular spacer is arranged as an elastic structure, and a closed moving loop is formed on the detection head, the annular spacer is sleeved on the outside of the detection head, and when in use, the inner belt surface of the same belt-shaped portion contacts the detection head, and the outer belt surface contacts the inner wall of the tunnel; The vehicle-mounted rapid crack detection device for tunnel maintenance further comprises a tensioning mechanism, and the tensioning mechanism is used to tension the annular spacer; The tensioning mechanism includes a second elastic telescopic rod and a third elastic telescopic rod, one end of the second elastic telescopic rod is hinged on the hinge block, and the other end is pushed on the inner belt surface of the annular partition when in use. There are two second elastic telescopic rods, and the two second elastic telescopic rods are symmetrically arranged about the detection head; the two ends of the third elastic telescopic rod are respectively hinged on the two second elastic telescopic rods, and are configured to be able to spread out the two second elastic telescopic rods.

2. The vehicle-mounted rapid crack detection device for tunnel maintenance according to claim 1, characterized in that: The tensioning mechanism also includes two rotating wheels, which are sleeved on the end of the second elastic telescopic rod away from the hinge block and can rotate on their own. When in use, the rotating wheels push against the inner belt surface of the annular spacer belt.

3. The vehicle-mounted rapid crack detection device for tunnel maintenance according to claim 1, characterized in that: The tensioning mechanism further comprises a slide groove and a slide protrusion, wherein the slide groove is arranged on the detection head; the slide protrusion is fixedly arranged on the third elastic telescopic rod and is slidably inserted in the slide groove.

4. The vehicle-mounted rapid crack detection device for tunnel maintenance according to claim 1, characterized in that: There are two third elastic telescopic rods, which are symmetrically arranged with respect to the detection head.

5. The vehicle-mounted rapid crack detection device for tunnel maintenance according to claim 1, characterized in that: The tensioning mechanism further comprises an elastic telescopic block, which is arranged on the hinge block and opposite to the detection head. When in use, the elastic telescopic block pushes against the inner belt surface of the annular spacer belt.

6. The vehicle-mounted rapid crack detection device for tunnel maintenance according to claim 1, characterized in that: The vehicle-mounted rapid crack detection device for tunnel maintenance further comprises a lifting mechanism, and the lifting mechanism is configured to provide a driving force for the base plate to move in a vertical direction.

7. The vehicle-mounted rapid crack detection device for tunnel maintenance according to claim 1, characterized in that: The vehicle-mounted rapid crack detection device for tunnel maintenance further comprises a driving mechanism, and the driving mechanism is configured to provide a driving force for the rotation of the base plate.

8. The vehicle-mounted rapid crack detection device for tunnel maintenance according to claim 1, characterized in that: Four wheels are arranged at the bottom of the machine base.

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