Tunnel secondary lining defect detection device and method

Abstract

The present invention relates to a tunnel secondary lining defect detection device and method, comprising a vehicle body, a turntable installed on the vehicle body, a first swing drive mechanism installed on the turntable, the swing drive mechanism is connected to one end of a telescopic arm, the other end of the telescopic arm is connected to a support platform, the support platform is provided with an image acquisition element and a knocking mechanism, and a second swing drive mechanism is also provided, the second swing drive mechanism is connected to a nozzle, the nozzle is connected to a discharge port of a driving pump through a flexible pipeline, the feed port of the driving pump is connected to a plurality of pigment bins through a discharge pipeline, a switch valve is installed on the discharge pipeline between each pigment bin and the driving pump, and the detection device of the present invention can mark defects to facilitate subsequent processing.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel detection, and in particular to a tunnel secondary lining defect detection device and method. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] During the construction of the secondary lining of the tunnel, defects are very likely to occur due to the influence of many factors such as construction technology, building materials, construction personnel and construction equipment. Patent CN206096045U discloses an automatic knocking detection device for railway tunnel lining, which detects defects in the secondary lining by knocking on the secondary lining through a knocking mechanism. However, the inventor found that in the above scheme, the defective parts cannot be marked, which is inconvenient for subsequent defect processing and can only be marked manually, which increases labor intensity and reduces work efficiency. In addition, manual marking poses certain safety hazards to the staff. The inventor also found that the microphone is set outside, which is easy to convert the sound signals of the surrounding environment into electrical signals, causing certain interference to the detection results. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a tunnel secondary lining defect detection device, which can mark the defective parts immediately after the knocking is completed, facilitate the subsequent processing of the defects, and improve work efficiency.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions

[0006] In the first aspect, an embodiment of the present invention provides a tunnel secondary lining defect detection device, including a vehicle body, a turntable installed on the vehicle body, a first swinging drive mechanism installed on the turntable, the swinging drive mechanism is connected to one end of a telescopic arm, the other end of the telescopic arm is connected to a support platform, the support platform is provided with an image acquisition element and a knocking mechanism, and a second swinging drive mechanism is also provided, the second swinging drive mechanism is connected to a nozzle, the nozzle is connected to a discharge port of a driving pump through a flexible pipeline, the feed port of the driving pump is connected to multiple pigment bins through a discharge pipeline, and a switch valve is installed on the discharge pipeline between each pigment bin and the driving pump.

[0007] Optionally, the knocking mechanism includes a fixed part fixed to the support platform, one end of the fixed part is open and has a cavity inside, a knocking head is provided in the cavity and extends to the outside of the fixed part through the open end of the fixed part, the knocking head is slidably connected to the fixed part, an elastic member is provided between the knocking head and the cavity surface of the cavity, and the knocking head is also connected to a pullback mechanism arranged on the fixed part.

[0008] Optionally, the pullback mechanism includes a pullback drive member, the shell of which is fixed on the outer side of the fixed part, the output shaft of which extends into the cavity and is connected to a wire pull drum, the wire pull drum is wound with a wire, and the movable end of the wire pull is connected to the striking head.

[0009] Optionally, a plurality of pullback driving members are arranged at equal intervals along the circumferential direction of the fixing portion.

[0010] Optionally, a sound collector installation cavity is provided in the fixing part, and the sound collector installation cavity is provided close to the open end of the fixing part, and a probe of the sound collector is installed inside the sound collector, and the sound collector is connected to the control system.

[0011] Optionally, the first swing mechanism includes a support, the support is connected to the rotating platform, a first swing motor is arranged on the support, and an output shaft of the first swing motor is connected to the end of the telescopic arm.

[0012] Optionally, the second swing mechanism includes a second swing motor, the second swing motor is fixed on the support platform, and the output shaft of the second swing motor is connected to the nozzle.

[0013] Optionally, the telescopic arm is an electric telescopic arm or a hydraulic telescopic arm.

[0014] Optionally, the image acquisition element adopts a camera, and the camera is fixed on the support platform through a camera bracket.

[0015] In the second aspect, an embodiment of the present invention provides a working method of the tunnel secondary lining defect detection device described in the first aspect: the vehicle body moves into the interior of the tunnel, and the knocking mechanism is driven to move to a set position by the rotating platform, the first swing mechanism and the telescopic arm, and the knocking mechanism knocks on the tunnel secondary lining, and determines whether there is a defect in the secondary lining based on the sound generated. When it is determined that there is a defect at the knocking position based on the knocking sound, the switch valve of the paint bin corresponding to the defect is opened, the pump is driven to work, and the corresponding paint is sprayed at the defect to mark the defect.

[0016] Beneficial effects of the present invention:

[0017] 1. The secondary lining defect detection device of the present invention comprises a nozzle, a driving pump and a pigment bin. When it is determined that there is a defect at the knocking position of the secondary lining according to the sound generated by the knocking mechanism, the driving pump and the nozzle can be used to spray out corresponding pigments to mark the defective position, which is convenient for subsequent defect processing and does not require manual marking, thereby improving efficiency, reducing labor intensity, and avoiding safety hazards to construction workers caused by manual marking.

[0018] 2. The second lining defect detection device of the present invention has a sound collector installation cavity arranged in the fixed part. The sound collector installation cavity is arranged close to the open end of the fixed part, and a sound collector probe is installed inside the sound collector, which can collect knocking sounds to the greatest extent, avoid interference from external environmental sounds, and ensure the accuracy of defect identification results.

[0019] 3. The second lining defect detection device of the present invention has an image acquisition element and can be used in conjunction with a knocking mechanism to ensure the accuracy of defect identification type. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0021] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic diagram of the assembly of the support platform, the knocking mechanism, the nozzle and the image acquisition element in Example 1 of the present invention;

[0023] Figure 3 This is a schematic diagram of the knocking mechanism of Example 1 of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the pullback motor according to Embodiment 1 of the present invention;

[0025] Figure 5 This is a schematic diagram of the coordination of the pigment bin, the drive pump and the switch valve in Example 1 of the present invention;

[0026] Figure 6 This is a schematic diagram of the working state of Embodiment 2 of the present invention;

[0027] Figure 7 This is a schematic diagram of disease marking in Example 2 of the present invention;

[0028] Among them, 1. Traveling vehicle, 2. First driving cab, 3. Support, 4. Telescopic arm, 5. Support platform, 6. Knocking mechanism, 6-1. Fixed part, 6-2. Knocking head, 6-3. Annular protrusion, 6-4. Spring, 6-5. Pull back motor, 6-6. Wire pull drum, 6-7. Wire pull, 6-8. Probe, 7. Nozzle, 8. Image acquisition element, 9. Driving pump, 10. Paint bin, 11. Switch valve. DETAILED DESCRIPTION

[0029] Example 1

[0030] This embodiment provides a tunnel secondary lining defect detection device, such as Figure 1-Figure 5As shown, the traveling vehicle 1 includes a traveling vehicle 1. The traveling vehicle 1 can adopt the existing traveling vehicle structure, including a vehicle body, a traveling wheel is installed at the bottom of the vehicle body, a turntable is installed on the vehicle body, the turntable is connected to the supporting platform, a first driving cab 2 is arranged at the rear end of the supporting platform, and is used to control the operation of related equipment for the second lining defect detection. A second driving cab is also arranged at the front end of the vehicle body, and is used to control the movement of the traveling vehicle. The traveling vehicle can adopt the existing structure, and its specific structure will not be described in detail here.

[0031] The turntable can be an existing turntable, which can output rotation around a vertical axis. Its specific structure will not be described in detail here.

[0032] The support platform on the front side of the first cab 2 is provided with a first swinging drive mechanism, and the first swinging drive mechanism includes a support 3, and the support 3 is connected to the motion output platform of the turntable. The turntable can drive the support to rotate around the vertical axis. The top of the support is provided with a first swinging drive member. In this embodiment, the first swinging drive member adopts a first swinging motor, and the first swinging motor is connected to the reducer. The first swinging motor and the reducer are both fixed on the support. The output shaft of the reducer is arranged in the horizontal direction, and the output shaft of the reducer is connected to the head end of the telescopic arm 4, which can drive the telescopic arm to swing.

[0033] The turntable and the first swing motor are both connected to a control system arranged on the vehicle body, and their operations are controlled by the control system.

[0034] In this embodiment, the telescopic arm 4 adopts an existing electric telescopic arm or a hydraulic telescopic arm. The telescopic arm 4 is connected to a control system, and its operation is controlled by the control system. The telescopic arm 4 can adopt existing equipment, and its specific structure will not be described in detail here.

[0035] A support platform 5 is fixed to the end of the telescopic arm 4. The telescopic arm 4 can drive the support platform 5 to perform telescopic movement. In conjunction with the first swing drive mechanism and the turntable, the support platform can reach any position in the tunnel.

[0036] The support platform 4 is equipped with a knocking mechanism 6 , a nozzle 7 and an image acquisition element 8 .

[0037] The knocking mechanism 6 is used to knock on the second lining, and judge whether the second lining has defects through the sound produced by the knocking. The image acquisition element is used to capture the image of the surface of the second lining, and can judge whether the second lining has defects through the image.

[0038] Specifically, the knocking mechanism includes a fixing part 6-1, the bottom end of which is fixedly connected to the support platform 5, and the fixing part 6-1 is a cylindrical structure with an open top and a cavity inside.

[0039] A striking head 6-2 is arranged in the cavity, and the striking head 6-2 is coaxially arranged with the fixing part 6-1. The striking head 6-2 extends to the outside of the fixing part 6-1 through the open end of the fixing part 6-1, and the striking head 6-2 is slidably connected with the fixing part 6-1 and can move along its own axial direction.

[0040] Specifically, the inner surface of the cavity of the fixing portion 6-1 is provided with an annular protrusion 6-3, the inner surface of the annular protrusion 6-3 is in contact with and slidably connected to the outer surface of the striking head 6-2, and the striking head 6-2 uses the annular protrusion 6-3 to guide the linear motion.

[0041] A spring 6-4 is sleeved on the outer periphery of the bottom end of the striking head 6-2, one end of the spring 6-4 is fixed to the striking head, and the other end is fixed to the bottom cavity surface of the cavity.

[0042] The spring 6-4 can drive the striking head 6-2 to move toward the outside of the fixing part through elastic force, thereby striking the second lining.

[0043] The striking head 6 - 2 is also connected to a pull-back mechanism installed on the fixing portion, and the pull-back mechanism is used to pull the striking head back to the fixing portion.

[0044] In this embodiment, the pulling back mechanism includes a plurality of pulling back driving members distributed along the annular direction. In this embodiment, the pulling back driving member adopts a pulling back motor 6-5. The pulling back motor 6-5 adopts a forward and reverse motor without a self-locking function, that is, after the pulling back motor is powered off, the output shaft can rotate freely under the action of external force. The housing of the pulling back motor is fixed to the outer peripheral surface of the fixed part by bolts. The output shaft of the pulling back motor is arranged radially along the fixed part, and the output shaft of the pulling back motor 6-5 extends into the cavity. The output shaft of the pulling back motor is fixed with a wire drum 6-6, and a wire 6-7 is wound on the wire drum 6-6. The movable end of the wire 6-7 is connected to the striking head 6-2 by a connecting rod 6-8.

[0045] When the striking head 6-2 is extended, the pulling motor 6-5 drives the wire pulling drum 6-6 to rotate, and the striking head 6-2 is pulled back to the fixing part 6-1 through the pulling wire 6-7 to overcome the elastic force of the spring 6-4.

[0046] The working principle of the knocking mechanism of this embodiment is: the pull-back motor pulls the knocking head back to the fixed part through the pull wire to overcome the spring force. When the pull-back motor is powered off, since the pull-back motor does not have a self-locking function, the spring pushes the knocking head out under the action of the spring force to knock on the second lining. When the pull-back motor is powered on again, the knocking head can be pulled back, thereby realizing multiple knocks on multiple second linings.

[0047] The pull-back motor is connected to a control system, and its operation is controlled by the control system.

[0048] Compared with the automatic knocking detection device for railway tunnel lining disclosed in patent CN206096045U, the present application only needs to set one knocking head to achieve multiple knockings, which reduces the space occupied by the knocking mechanism and facilitates the installation of the knocking mechanism on the support platform.

[0049] The fixing part is also provided with a plurality of sound collector installation cavities, which are distributed circumferentially on the outer periphery of the cavity and are arranged close to the open end of the fixing part. A sound collector is arranged in the sound collector installation cavity, and the probe 6-9 of the sound collector is fitted and fixed on the top cavity surface of the sound collector installation cavity, and its data line is led out through the threading channel arranged in the fixing part and connected to the control system.

[0050] The sound signal of knocking can be transmitted to the control system through the sound collector, and because the sound collector is arranged inside the fixed part, the interference of external sound is minimized under the effect of sound insulation of the fixed part, thereby ensuring the accuracy of the defect identification result.

[0051] In this embodiment, the knocking mechanism 6 is arranged at the lower side of the support platform 5, and an image acquisition element 8 is arranged at the upper side of the support platform 5. In this embodiment, the image acquisition element 8 uses a camera, and the camera is fixed on the support platform 5 through a camera bracket. The camera is connected to the control system through a data cable, and can transmit the collected image information to the control system. A fill light is also provided on one side of the camera, and the fill light is fixed on the support platform. The fill light uses an LED light to fill light for the camera, so as to facilitate the camera to collect images.

[0052] A second swing driving mechanism is arranged in the middle of the support platform, and the second swing driving mechanism is connected to the spray head 7 .

[0053] The nozzle 7 is used to spray the pigment of the corresponding color to the defective position of the second lining.

[0054] In this embodiment, the second swing drive mechanism includes a second swing motor, the output shaft of the second swing motor is connected to the reducer, the second swing motor and the reducer are both fixed on the support platform, the output shaft of the reducer is connected to the nozzle seat, and the nozzle seat is connected to the nozzle. The second swing motor can drive the nozzle to swing, and then adjust the spraying direction of the pigment, so that the corresponding pigment can be sprayed within the defect range of the second lining for marking.

[0055] The nozzle is connected to the discharge port of a driving pump 9 installed on a supporting platform through a flexible tube. The flexible tube is a rubber tube that can adapt to changes in the angle of the nozzle. The feed port of the driving pump 9 is connected to a main discharge pipe, and the main discharge pipe is connected to multiple discharge pipelines. Each discharge pipeline is connected to a corresponding pigment bin 10, and the pigment bin 10 is fixed on the supporting platform.

[0056] In this embodiment, different pigment bins 10 contain pigments of different colors.

[0057] Each discharge pipeline is provided with a switch valve 11, which is an electrically controlled switch valve, such as a solenoid valve, an electrically controlled ball valve, or an electrically controlled butterfly valve. The switch valve is connected to the control system and can receive instructions from the control system to work.

[0058] The bottom of each pigment bin is connected with a sewage pipe through a switch valve, and one end of the sewage pipe is provided with a sewage outlet.

[0059] In this embodiment, when the camera and the knocking mechanism identify the defective position of the second lining, the control system opens the corresponding switch valve, drives the pump to work, drives the corresponding color paint to be sprayed from the nozzle to the defective position of the second lining, and marks the defective position.

[0060] It is convenient for subsequent processing of defects, and there is no need for manual marking, which improves efficiency, reduces labor intensity, and avoids safety hazards to construction workers caused by manual marking.

[0061] In this embodiment, the control system is connected to a display screen arranged in the cab at the rear end of the vehicle body. The driver can send instructions to the control system through the display screen, and the sound and image information obtained by the control system can be displayed on the display screen.

[0062] Example 2

[0063] This embodiment provides a working method of the tunnel secondary lining defect detection device described in Embodiment 1, such as Figure 6-Figure 7 As shown, the following steps are included:

[0064] Step 1: The traveling vehicle drives into the predetermined position of the tunnel.

[0065] Step 2: Divide the secondary lining of the tunnel into several detection areas. The divided areas can be set according to the actual situation.

[0066] Step 3: The turntable, the first swing drive mechanism and the telescopic arm work to move the support table to a set position outside the set area to be detected.

[0067] Step 4: The camera is started to collect the image of the second lining of the area to be detected. The pull-back motor is installed to work at a preset time interval and cooperate with the spring to make the knocking head knock the second lining area to be detected 2-3 times according to the set time interval.

[0068] The sound collector collects the sound and transmits the sound signal to the control system. The camera collects the image of the area to be detected and transmits the image information to the control system.

[0069] Construction workers determine whether the area to be inspected has defects based on the collected sounds and images.

[0070] Specifically, the cold joints of the secondary lining can be identified through the knocking mechanism, and the number of exposed reinforcements of the secondary lining in the tunnel, the number of concrete cracks, and the number of honeycombed concrete surfaces in the tunnel can be obtained through the images collected by the camera. The width, length, and direction of the concrete cracks can be obtained through the existing image analysis technology, and the area of ​​the honeycombed surface can also be obtained through the existing image analysis technology.

[0071] Step 5: When the staff identifies the defects and diseases in the area to be inspected, they open the corresponding switch valve through the control system, start the drive pump, and spray the set color paint on the diseased area to mark it for subsequent processing.

[0072] Step 6: Repeat steps 3 to 5 to inspect multiple areas of the tunnel secondary lining in sequence until all areas of the tunnel to be inspected have been inspected, and spray the defective areas with paint of corresponding colors for marking.

[0073] By using existing image processing technology, a three-dimensional distribution map of tunnel defects can be produced based on the final defect detection results.

[0074] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A tunnel secondary lining defect detection device, It is characterized in that It includes a vehicle body, a turntable is installed on the vehicle body, and a first swing drive mechanism is installed on the turntable, the swing drive mechanism is connected to one end of the telescopic arm, and the other end of the telescopic arm is connected to a support platform, and the support platform is provided with an image acquisition element and a knocking mechanism, and a second swing drive mechanism is arranged at the middle position of the support platform, and the second swing drive mechanism is connected to the nozzle, and the nozzle is connected to the discharge port of the driving pump through a flexible pipeline, and the feed port of the driving pump is connected to multiple pigment bins through a discharge pipeline, and a switch valve is installed on the discharge pipeline between each pigment bin and the driving pump; the knocking mechanism includes a fixed part fixed to the support platform, one end of the fixed part is open, and a sound collector installation cavity is arranged in the fixed part, and the sound collector installation cavity is arranged near the open end of the fixed part, and a probe of the sound collector is installed therein, and the sound collector is connected to the control system; the image acquisition element adopts a camera, and the camera is fixed on the support platform through a camera bracket, and the camera is connected to the control system through a data cable, and the collected image information can be transmitted to the control system; The first swing drive mechanism includes a support, the support is connected to the rotary platform, a first swing motor is arranged on the support, and an output shaft of the first swing motor is connected to the end of the telescopic arm; The second swing drive mechanism includes a second swing motor, which is fixed on the support platform. The output shaft of the second swing motor is connected to a nozzle, and the nozzle is connected to a discharge port of a driving pump installed on the support platform through a flexible tube, and the flexible tube is a rubber tube. The feed port of the driving pump is connected to a discharge main pipe, and the discharge main pipe is connected to a plurality of discharge pipelines, each of which is connected to a corresponding pigment bin, which is fixed on the support platform. Different pigment bins contain pigments of different colors. When the image acquisition element and the knocking mechanism identify the defective position of the second lining, the control system opens the corresponding switch valve, drives the pump to work, and drives the pigment of the corresponding color to be sprayed from the nozzle to the defective position of the second lining to mark the defective position; The telescopic arm is an electric telescopic arm or a hydraulic telescopic arm.

2. A tunnel secondary lining defect detection device as claimed in claim 1, It is characterized in that The fixing part has a cavity inside, in which a striking head is arranged and extends out of the fixing part through an open end of the fixing part. The striking head is slidably connected to the fixing part, an elastic member is arranged between the striking head and the cavity surface, and the striking head is also connected to a pullback mechanism arranged on the fixing part.

3. A tunnel secondary lining defect detection device as claimed in claim 2, It is characterized in that The pullback mechanism includes a pullback drive member, the shell of which is fixed on the outer side of the fixed part, the output shaft of which extends into the cavity and is connected to a wire pull drum, the wire pull drum is wound with a wire, and the movable end of the wire pull is connected to the striking head.

4. A tunnel secondary lining defect detection device as claimed in claim 3, It is characterized in that A plurality of pull-back driving members are arranged at equal intervals along the circumferential direction of the fixing portion.

5. A working method of the tunnel secondary lining defect detection device according to any one of claims 1 to 4, It is characterized in that The vehicle body moves into the tunnel. The knocking mechanism and the image acquisition element are driven by the slewing platform, the first swinging mechanism and the telescopic arm to move to the set position. The image acquisition element is activated to collect the image of the secondary lining in the area to be detected. The knocking mechanism knocks on the tunnel secondary lining, and the sound collector collects the sound and transmits the sound signal to the control system. The image acquisition element collects the image of the secondary lining in the area to be detected and transmits the image information to the control system. It is judged whether there are disease defects in the area to be detected according to the collected sound and image. When it is judged that there are defects at the knocking position according to the knocking sound and the image, the switching valve of the corresponding pigment bin for the defect is opened, the driving pump works, and the corresponding pigment is sprayed at the defect to mark the defect.

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