An automated sampling device for tunnel detection

Abstract

The application discloses a kind of automatic sampling device for tunnel detection, belong to tunnel engineering detection equipment technical field, the device with rack as basic carrier, integrated negative pressure adsorption, track walking, screw feeding sampling and in-situ anchoring module;Rack two ends are laid negative pressure device, cooperate with track wheel to realize tunnel lining wall surface stable walking and adsorption fit;Sampling device realizes accurate feeding by screw rod transmission, sampling mechanism uses multi-section split clamping type drill pipe and drill bit, can be spliced as needed to adjust sampling depth and has self-locking anti-dropping effect when drilling;Support self-tapping in-situ anchoring mechanism to ensure operation stability, around type spraying structure synchronously completes drill bit cooling and dust fall, rack end integrates water and electricity quick connection interface.The application can cover vault, haunch, inverted arch and other full-face area, eliminate sampling blind area, adapt to different lining thickness detection needs, compact overall structure adapts to narrow space, effectively improve the operation efficiency and data comprehensiveness of tunnel lining coring detection.

Description

Technical Field

[0001] This invention relates to an automated sampling device, and more particularly to an automated sampling device for tunnel inspection. Background Technology

[0002] During the construction and operation phases of tunnel engineering, the lining structure is a core component ensuring tunnel structural safety and resisting surrounding rock deformation. The strength, thickness, density, and internal defects of the lining concrete are key indicators for quality inspection. Core sampling is the mainstream method for tunnel lining quality inspection due to its ability to directly obtain complete core samples and its intuitive and reliable test results. It is widely used in construction acceptance, periodic inspections, and defect investigation. With the continuous expansion of tunnel construction in my country, the demand for inspection of existing operational tunnels is increasing year by year, placing higher demands on the efficiency, coverage, and environmental adaptability of lining core sampling operations. Currently, tunnel lining core sampling mainly relies on manual handheld drilling rigs or support-type core sampling equipment, which has many technical limitations.

[0003] (1) The sampling coverage is limited and there are blind spots in the full-section detection. Traditional support-type coring equipment can only be set up on the ground and can only cover the middle and low areas of the sidewall. It is difficult to reach the arch crown, arch waist, and low-lying areas of the invert arch. Some movable coring devices cannot be stably attached to the curved surface of the lining. When encountering uneven lining surfaces, alignment deviation and machine instability are likely to occur. It is impossible to achieve uniform sampling of the entire tunnel lining, resulting in insufficient representativeness of the test samples and difficulty in fully reflecting the overall quality of the lining.

[0004] (2) The on-site deployment process is cumbersome and the adaptability to operation in confined spaces is poor. The working space inside the tunnel is limited, especially the short inspection window period and traffic conditions in the operating tunnel. It is difficult to transport large coring equipment and the setup takes a long time, making it difficult to quickly move between multiple locations for operation. Small handheld coring equipment relies on manual support, and the machine body is prone to shaking during drilling. It is difficult to ensure the verticality and integrity of the core sample, which not only affects the accuracy of the test data but also poses a safety risk for high-altitude operations.

[0005] (3) Insufficient flexibility in adjusting core depth and weak adaptability to lining. The thickness of tunnel lining varies in different types and locations. Conventional core drilling rods are mostly fixed-length structures, which cannot flexibly adjust the core depth according to the target lining thickness. Overly long drill rods are prone to bending and jamming when operating on the arch or invert, while overly short drill rods cannot penetrate the lining to complete deep detection. In addition, the overall assembly and disassembly efficiency of the drill rod is low, and on-site adjustment is time-consuming, making it difficult to meet the needs of efficient detection.

[0006] (4) Lack of integrated operation support and insufficient adaptability to working conditions. During the core drilling process of lining concrete, the high-speed friction between the drill bit and the concrete easily generates high temperature, which aggravates drill bit wear and reduces the quality of core sample formation; at the same time, the large amount of dust generated by drilling is easy to spread in the enclosed space of the tunnel, which not only pollutes the working environment, but also easily enters the equipment and causes damage to components. Existing small-scale automated core drilling devices generally do not integrate cooling and dust suppression structures, making it difficult to operate continuously for a long time, and the equipment durability and working environment friendliness are insufficient.

[0007] Chinese patent CN202322312201.2 discloses an automatic deep rock sampling device for geological exploration, but it is designed for deep geological exploration, with a long drill rod, large equipment size, and inconvenient core angle adjustment, making it unsuitable for shallow core sampling in tunnel lining. Chinese patent CN202310746689.1 discloses a drilling and sampling device for rock mass sidewalls in tunnel construction surveys, which is mainly designed for rock mass sidewall sampling. It does not consider the needs for walking, adsorption, and in-situ fixation on curved lining walls, and the overall size of the equipment is too large, making it difficult to operate flexibly in narrow tunnel sections and arch areas.

[0008] In summary, existing tunnel sampling equipment cannot simultaneously meet the requirements of full-section lining sampling, rapid deployment in confined spaces, flexible adjustment of core sampling depth, and integrated operation support, and cannot efficiently adapt to the actual working conditions of tunnel lining quality inspection. Therefore, there is an urgent need to develop an automated sampling device for tunnel inspection that can move along the entire lining wall, is anchored in situ for stability, has flexible adjustment of core sampling depth, and also has cooling and dust suppression functions. Summary of the Invention

[0009] This invention provides an automated sampling device for tunnel inspection, which aims to solve the problems of existing tunnel sampling devices, such as numerous sampling blind spots, poor adaptability to complex terrain, cumbersome deployment, and insufficient operational stability.

[0010] To achieve the above objectives, the present invention provides an automated sampling device for tunnel inspection, comprising:

[0011] The frame has several negative pressure holes symmetrically arranged at both ends, and a pair of drive brackets symmetrically arranged in the middle of the frame. The top of the drive bracket is equipped with a first motor, and the middle of the drive bracket is opened with a mounting hole. A lead screw is installed in the mounting hole, and the output end of the first motor is connected to the lead screw. A first through hole is provided on the frame between the two drive brackets.

[0012] Negative pressure device, the negative pressure device is assembled in the negative pressure hole;

[0013] The sampling device includes an assembly plate, a third motor mounted on the assembly plate, and a sampling mechanism mounted on the output end of the third motor; mounting blocks are provided on both sides of the assembly plate, and the mounting blocks are mounted on the lead screw.

[0014] Track wheels, several sets of track wheels are set on the side of the frame.

[0015] Furthermore, the sampling mechanism includes a connecting mechanism, several sets of drill rod sections of the same length, and several drill bit sections; the connecting mechanism is fixedly connected to the output end of the first motor, and several first slots are arranged around it; several first blocks are arranged around the edge of one end of the drill rod section, and several second slots are arranged around the other end of the drill rod section away from the first blocks; a second block is provided at one end of the drill bit section; the number of first slots, first blocks, second slots, and second blocks are the same, and their positions are matched.

[0016] Furthermore, guide blocks are symmetrically arranged at the middle position of the side of the frame, and a second through hole is provided on the guide block. The second through hole is provided with an internal thread. The outer side of the drive bracket is provided with a slide groove, and the slider is slidably arranged in the slide groove. A second motor is provided at the bottom of the slider. The output end of the second motor is equipped with a self-tapping part, and the self-tapping part is provided with an external thread that matches the internal thread in the second through hole.

[0017] Furthermore, a power quick connector is provided at one end of the frame.

[0018] Furthermore, one end of the frame is provided with a water pipe quick connector, and the bottom of the frame is provided with several nozzles arranged around the first through hole. The nozzles and the water pipe quick connector are connected by pipes arranged inside the frame.

[0019] Furthermore, the number and position of the track wheels are matched with the negative pressure device.

[0020] Furthermore, a sealing strip is installed around the negative pressure hole on the back of the frame.

[0021] Furthermore, a picking mechanism is provided on the frame on the side of the drive bracket.

[0022] Furthermore, the negative pressure device is a fan.

[0023] Another aspect of the present invention provides a method of using an automated sampling device, comprising the steps of:

[0024] S1: Select the number of drill rod segments according to the lining depth, use the snap-fit ​​relationship between the first snap-fit ​​block and the first snap-fit ​​groove to install one set of drill rod segments on the connecting mechanism, and then snap-fit ​​and connect them in sequence through the first snap-fit ​​block and the second snap-fit ​​groove set on the other drill rod segments. Then snap-fit ​​each set of drill bit segments onto the last set of drill rod segments to complete the assembly of the sampling mechanism.

[0025] S2: Place the automated sampling device on the tunnel wall, and then connect the power cord and water pipe as needed via power quick connectors and water pipe quick connectors;

[0026] S3: Activate the negative pressure device and control the automated sampling device to move to the sampling area via remote control equipment;

[0027] S4: Start the second motor to allow the self-tapping component to penetrate the surrounding rock of the tunnel and fix the automated sampling device. Then start the first motor to allow the tip of the drill bit to contact the tunnel wall.

[0028] S5: Turn on the third motor. If a water pipe is connected, turn on the external water source at the same time so that the sampling mechanism starts to rotate while the nozzle sprays water.

[0029] S6: Activate the automatic sampling mode, allowing the system to automatically control the first and third motors, enabling the automated sampling device to perform sampling operations automatically; after sampling is completed, the system controls the first, second, and third motors to reverse, allowing the self-tapping component and sampling mechanism to rotate out from inside the tunnel wall;

[0030] S7: Control the automated sampling device to return to the ground, pull out the drill rod and drill bit, and obtain the sample.

[0031] In summary, the present invention has the following advantages over the prior art:

[0032] (1) The wall-walking architecture, which couples a negative pressure device with tracked wheels, relies on the negative pressure adsorption force to allow the whole machine to stably adhere to the lining wall surface with any curvature, such as the tunnel sidewall, arch, arch waist, and invert arch, breaking through the spatial limitation of traditional support-type equipment that can only perform low-level fixed-point sampling. The tracked wheel structure can adapt to the unevenness of the lining surface, and the sealing strip around the negative pressure hole compensates for the wall surface flatness error, continuously maintaining a stable adsorption state and effectively avoiding slippage and local desorption problems. This design can achieve accurate positioning sampling at any point on the entire tunnel section, greatly improving the coverage and representativeness of the lining core sample, and ensuring the comprehensiveness and accuracy of the test results of lining strength, thickness, and density.

[0033] (2) The sampling mechanism adopts an axially snap-fit ​​splicing structure of multi-section drill rods and drill bits, which can flexibly increase or decrease the number of drill rod sections according to the target lining thickness, accurately matching the core sampling depth requirements of different grades of tunnels and different parts of the lining, avoiding the volume redundancy and control difficulties of fixed-length drill rods; the split sections adopt a ring array of slot-block cooperation structure, and the axial reaction force of the lining concrete during drilling can press the blocks tightly into the bottom of the slot, forming a natural self-locking effect. Especially in extreme working conditions where the arch is vertically downward and the invert is vertically upward, the drill rod and drill bit will not loosen or fall off due to gravity or vibration. At the same time, the split structure is easy to assemble and disassemble. After core sampling, the complete core sample can be directly disassembled and taken out, which significantly improves the efficiency of on-site operations.

[0034] (3) An in-situ anchoring system consisting of a second motor, self-tapping component, guide block, and sliding block is set up. After the device moves to the sampling point, the self-tapping component can be directly driven to screw into the lining surface to fix the frame in place. No additional support platform or auxiliary fixing fixtures are required, which greatly simplifies the equipment deployment process in the complex environment of the tunnel and reduces the operational difficulty and safety risks of working at high altitudes and in narrow spaces. It is especially suitable for the inspection operation needs of short window periods in operating tunnels. The self-tapping component is precisely fed along the guide block through threaded engagement. The sliding guide of the sliding block ensures the coaxiality of the feed. The frame does not deviate or shake during core sampling, which effectively ensures the verticality of the borehole and the quality of the core sample. After sampling, the reverse motor can quickly remove the anchor and release the anchor. It can seamlessly connect the walking process and is suitable for continuous sampling operations at multiple points.

[0035] (4) Spray nozzles are arranged around the first through hole, and water is sprayed simultaneously during the drilling process. On the one hand, the drill bit can be cooled in real time, reducing high-temperature wear, extending the service life of the drill bit, and ensuring continuous drilling efficiency. On the other hand, it can effectively suppress the diffusion of concrete dust generated during drilling, improve the working environment in the enclosed space of the tunnel, and reduce the corrosion of dust on the internal components and negative pressure device of the equipment. With the sealing strip around the negative pressure hole, dust can be further blocked from entering the equipment, significantly improving the stability and durability of the whole machine in the high dust tunnel environment, and supporting long-term continuous core sampling operations.

[0036] (5) The walking adsorption system, sampling system, anchoring system and cooling spray system are highly integrated into a single frame. The overall structure is compact and small in size, and it can flexibly move through restricted spaces such as tunnel bends and narrow cross sections, breaking through the space limitations of large sampling equipment. The end of the frame integrates power quick connectors and water pipe quick connectors, which can quickly complete the on-site water and electricity connection and adapt to the temporary working conditions on the tunnel site. The matching picking mechanism facilitates manual transfer and point layout, effectively reducing the labor cost of on-site operations and improving the overall work efficiency of tunnel lining core sampling inspection. Attached Figure Description

[0037] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0038] Figure 1 A schematic diagram of the overall structure of an automated sampling device for tunnel inspection;

[0039] Figure 2 A side view of an automated sampling device used for tunnel inspection;

[0040] Figure 3 A top view of an automated sampling device used for tunnel inspection;

[0041] Figure 4A bottom view of an automated sampling device used for tunnel inspection;

[0042] Figure 5 This is an exploded view of the connecting mechanism.

[0043] The above figures include the following reference numerals:

[0044] 1. Frame; 11. Negative pressure hole; 12. Drive bracket; 121. First motor; 122. Mounting hole; 123. Lead screw; 124. Slide groove; 13. First through hole; 14. Guide block; 141. Second through hole; 15. Power quick connector; 16. Water pipe quick connector; 2. Negative pressure device; 3. Sampling device; 31. Third motor; 32. Sampling mechanism; 321. Connecting mechanism; 3211. First slot; 322. Drill rod body; 3221. First locking block; 3222. Second slot; 323. Drill bit body; 3231. Second locking block; 33. Assembly plate; 331. Mounting block; 4. Slider; 41. Second motor; 5. Track wheel; 6. Self-tapping component; 7. Sealing seal; 8. Picking mechanism; 9. Nozzle. Detailed Implementation

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the invention. As used herein, the singular form may also include the plural form unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0047] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0048] like Figures 1 to 5 As shown, this invention provides an automated sampling device for tunnel inspection, hereinafter referred to as the automated sampling device. It mainly consists of a frame 1, a negative pressure device 2, a sampling device 3, and track wheels 5. The connection relationship and function of each component are as follows:

[0049] A frame 1 has several negative pressure holes 11 symmetrically arranged at both ends, and a pair of drive brackets 12 symmetrically arranged in the middle of the frame 1. A mounting hole 122 is opened in the middle of the drive bracket 12, and a lead screw 123 is installed in the mounting hole 122. A first motor 121 is provided on the top of the drive bracket 12, and the output end of the first motor 121 is connected to the lead screw 123. In addition, a first through hole 13 is provided on the frame 1 between the two drive brackets 12.

[0050] Negative pressure device 2 is installed in negative pressure hole 11 and is used to apply force to the frame 1 perpendicular to the wall to prevent the frame 1 from falling off the wall.

[0051] The sampling device 3 includes an assembly plate 33, a third motor 31 mounted on the assembly plate 33, and a sampling mechanism 32 mounted on the output end of the third motor 31; mounting blocks 331 are provided on both sides of the assembly plate 33, and the mounting blocks 331 are mounted on the lead screw 123.

[0052] Track wheels 5, several sets of track wheels 5 are arranged on the side of the frame 1.

[0053] Note: In actual use, if the flatness of the tunnel wall is low (in a few cases), it can be solved by reducing the diameter of the negative pressure hole 11 and increasing the number of negative pressure holes 11 and negative pressure devices 2.

[0054] As a preferred option, the number and position of the track wheels 5 are matched with the negative pressure device 2. This arrangement allows the negative pressure clamping force generated by the negative pressure device 2 to act on the contact area of ​​the track wheels 5 nearby, concentrating the overall clamping force on the wheel assembly. The wheel surface receives sufficient positive pressure against the tower wall, making slippage less likely. This provides more sufficient driving force for vertical climbing and circumferential movement, preventing the problem of "being able to hold but not move". In addition, the close proximity of the track wheels 5 to the negative pressure device 2 ensures that the center of gravity, the center of suction pressure, and the support fulcrum of the machine are highly aligned. Under the condition of tunnel curved surfaces, the front and rear wheels are subjected to uniform force, making it less likely to lift off the edge or detach from the suction, significantly improving the stability of movement on vertical walls.

[0055] As a preferred option, a sealing strip 7 is provided around the negative pressure hole 11 on the back of the frame 1. The sealing strip 7 can deform, which can improve the sealing between the negative pressure hole 11 and the tunnel wall during the actual use of this device.

[0056] As a preferred embodiment, the sampling mechanism 32 includes a connecting mechanism 321, several sets of drill rod sections 322 of the same length, and several drill bit sections 323. The connecting mechanism 321 is fixedly connected to the output end of the first motor 121 and has several first slots 3211 arranged around it. Several first blocks 3221 are arranged around the edge of one end of the drill rod section 322, and several second slots 3222 are arranged around the other end of the drill rod section 322 away from the first blocks 3221. A second block 3231 is provided at one end of the drill bit section 323. The number of first slots 3211, first blocks 3221, second slots 3222, and second blocks 3231 are the same, and their positions are matched.

[0057] In actual use, the drill rod body 322 and the connecting mechanism 321 can be connected by engaging the first locking block 3221 into the first locking slot 3211. If the length of the sampling mechanism 32 needs to be increased, the same method can be used to engage and connect several sets of drill rod bodies 322 together. At the end of the drill rod body 322, the drill bit body 323 is engaged and connected to the last set of drill rod bodies 322 through the cooperation of the second locking slot 3222 and the second locking block 3231, thereby completing the assembly of the entire sampling mechanism 32.

[0058] The connection between the drill bit body 323 and the drill pipe body 322 is an axial plug-in type snap-fit ​​connection.

[0059] During drilling operations, the drill rod body 322 carries the drill bit body 323 forward (in the direction of the lining) and rotates. The lining will generate a backward axial reaction force on the drill bit body 323 (pointing towards the connecting mechanism 321 and opposite to the direction of feed).

[0060] This force acts directly on the drill bit body 323, pressing the back end of the chuck tightly against the bottom of the slot of the drill rod body 322 (the greater the drilling pressure, the tighter the chuck fit, and there will be no tendency to "pull out forward", but rather the more you drill, the more stable it becomes).

[0061] The circumferential reaction force of the 323 split drill bit cutting lining is borne by the circumferential sidewall of the slot and the side of the chuck block: the multiple sets of chuck blocks and slots in the ring array uniformly transmit torque, and the circumferential force only acts on the left and right sidewalls of the slot, and will not be converted into axial separation force; the multi-point circumferential constraint also avoids radial movement of the drill bit, and will not cause the chuck to loosen due to eccentric vibration.

[0062] During normal drill retraction, the drill rod body 322 retracts backward as a whole. The front opening edge of the drill rod chuck abuts against the front step / end face of the chuck block, causing the drill bit body 323 to move backward synchronously. As long as the drill bit is not severely jammed by the lining, it can be withdrawn along with the drill rod body 322 and will not be left in the borehole. At the same time, the chuck block and the chuck slot have a precise transition fit and inherently possess a certain amount of insertion and extraction resistance. The vibration and borehole wall friction during normal operation are insufficient to overcome this resistance and cause loosening.

[0063] The drill bit is composed of multiple independent split rings, each with its own locking structure: no single drill bit split 323 has the space to fall off individually (both radial and circumferential directions are limited by the locking groove); even if one set of locking becomes loose, the locking structures of the remaining splits can still maintain overall stability and will not fall off as a whole.

[0064] As the drill pipe feeds upwards, it cuts the lining. The lining exerts a downward axial reaction force on the drill bit (pointing towards the drill pipe base), pressing the chuck tightly against the bottom of the chuck groove. The greater the drilling pressure, the tighter the chuck engages, creating a natural self-locking mechanism. When stationary and unloaded: the drill bit's own weight also points towards the drill pipe base, and gravity continues to press the chuck against the bottom of the chuck groove, making it more stable than in horizontal conditions, with no tendency to disengage.

[0065] As a preferred embodiment, guide blocks 14 are symmetrically arranged at the middle position of the side of the frame 1. The guide blocks 14 are provided with a second through hole 141, and the second through hole 141 is provided with an internal thread. In addition, the outer side of the drive bracket 12 is provided with a slide groove 124, and the slider 4 is slidably arranged in the slide groove 124. The bottom of the slider 4 is provided with a second motor 41, and the output end of the second motor 41 is equipped with a self-tapping part 6. The self-tapping part 6 is provided with an external thread that matches the internal thread in the second through hole 141.

[0066] In actual use, the automated sampling device is controlled by a remote control device to move to the sampling area, and then the second motor 41 is operated to rotate the self-tapping component 6 connected to it. During the rotation of the self-tapping component 6, since the self-tapping component 6 is threadedly connected to the guide block 14, the self-tapping component 6 will drive the slider 4 to move downward and make the tip of the self-tapping component 6 contact the tunnel wall. As the self-tapping component 6 continues to rotate, the threaded guide block 14 can continuously provide a downward force to the self-tapping component 6, allowing the self-tapping component 6 to penetrate into the surrounding rock of the tunnel until the slider 4 runs to the bottom of the groove 124, thus completing the fixation of the frame 1 to the tunnel surface and achieving the effect of ensuring the stability of the sampling process of the sampling device 3.

[0067] As a preferred option, one end of the frame 1 is provided with a power quick connector 15, which connects to an external power source, allowing the device to operate for extended periods inside the tunnel.

[0068] As a preferred embodiment, one end of the frame 1 is provided with a water pipe quick connector 16, and the bottom of the frame 1 is provided with several nozzles 9 arranged around the first through hole 13. The nozzles 9 and the water pipe quick connector 16 are connected by pipes arranged inside the frame 1. During use, the drill bit may overheat during rotation, thereby affecting the drilling efficiency of the drill bit. By spraying water through the added nozzles 9, the temperature of the drill bit can be reduced, allowing it to drill into the lining more efficiently.

[0069] As a preferred embodiment, a picking mechanism 8 is provided on the frame 1 on the side of the drive bracket 12 to facilitate the user in picking up the device.

[0070] As a preferred option, the negative pressure device 2 is a fan. In actual use, the fan can apply a downward pressure perpendicular to the wall to the frame 1, so that the frame 1 can stick to the wall and not fall off.

[0071] The steps for using this device are as follows:

[0072] S1, Sampling mechanism assembly: Determine the number of drill pipe sections 322 to be used according to the target sampling depth, align the first locking block 3221 of the first section of the drill pipe section 322 with the first locking groove 3211 of the connecting mechanism 321 and insert it axially, then splice the remaining drill pipe sections 322 in sequence, and finally snap the drill bit section 323 into the end of the last section of the drill pipe section 322 to complete the assembly of the sampling mechanism 32.

[0073] S2, On-site deployment: Place the device on the tunnel wall, connect it to the external power supply line through the power quick connector 15, and connect it to the on-site water supply pipeline through the water pipe quick connector 16 according to the operation requirements.

[0074] S3, Walking and Alignment: Activate the negative pressure device 2 to make the whole machine adhere to the wall surface; control the track wheels 5 to walk through the remote control terminal and move the device to the preset sampling point.

[0075] S4, In-situ anchoring: Start the second motor 41 to drive the self-tapping part 6 to rotate; the self-tapping part 6 feeds axially along the second through hole 141 under the threaded engagement with the guide block 14, while driving the slider 4 to slide down along the slide groove 124. The tip of the self-tapping part 6 gradually screws into the surrounding rock until the slider 4 moves to the bottom of the slide groove 124, completing the in-situ fixing of the frame 1.

[0076] S5, Drilling and Sampling: Start the first motor 121 to drive the lead screw 123 to rotate, which in turn drives the assembly plate 33 and the sampling mechanism 32 to feed together, so that the tip of the drill bit 323 contacts the tunnel wall; then start the third motor 31 to drive the sampling mechanism 32 to rotate and drill at high speed; if a water supply pipe is connected, the water source is turned on simultaneously, and the nozzle 9 continuously sprays water to achieve cooling and dust reduction.

[0077] S6, Automatic Operation: When the automatic sampling mode is activated, the control system automatically matches the feed speed of the first motor 121 with the rotation speed of the third motor 31 to complete the fixed-depth sampling. After the sampling is completed, the control system controls the first motor 121 to reverse, driving the sampling mechanism 32 to retract and reset, and then controls the second motor 41 to reverse, so that the self-tapping part 6 can be rotated out of the surrounding rock to release the anchor.

[0078] S7, Sampling and Recovery: The control device moves back to a position that is easy to operate, disassembles the drill rod part 322 and the drill bit part 323, takes out the internal rock sample, and completes a single sampling operation.

[0079] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0080] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0081] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automated sampling device for tunnel inspection, characterized in that, include: A frame (1) is provided with several negative pressure holes (11) symmetrically arranged at both ends of the frame (1), and a pair of drive brackets (12) are symmetrically arranged at the middle position of the frame (1). A first motor (121) is provided at the top of the drive bracket (12), and a mounting hole (122) is opened at the middle position of the drive bracket (12). A lead screw (123) is installed in the mounting hole (122), and the output end of the first motor (121) is connected to the lead screw (123). A first through hole (13) is provided on the frame (1) between the two drive brackets (12). Negative pressure device (2), which is assembled in negative pressure hole (11); The sampling device (3) includes an assembly plate (33), a third motor (31) mounted on the assembly plate (33), and a sampling mechanism (32) mounted on the output end of the third motor (31); the assembly plate (33) has mounting blocks (331) on both sides, and the mounting blocks (331) are mounted on the lead screw (123); Track wheels (5), several sets of said track wheels (5) are arranged on the side of the frame (1).

2. The automated sampling device for tunnel inspection according to claim 1, characterized in that, The sampling mechanism (32) includes a connecting mechanism (321), several sets of drill rod sections (322) of the same length, and several drill bit sections (323); the connecting mechanism (321) is fixedly connected to the output end of the first motor (121), and several first slots (3211) are provided around it; several first blocks (3221) are provided around the edge of one end of the drill rod section (322), several second slots (3222) are provided around the other end of the drill rod section (322) away from the first blocks (3221), and a second block (3231) is provided at one end of the drill bit section (323); the number of the first slots (3211), the first blocks (3221), the second slots (3222), and the second blocks (3231) are the same, and their positions are matched.

3. The automated sampling device for tunnel inspection according to claim 1, characterized in that, The frame (1) has guide blocks (14) symmetrically arranged in the middle of its side. The guide blocks (14) have a second through hole (141) with an internal thread. The outer side of the drive bracket (12) has a slide groove (124). The slider (4) is slidably arranged in the slide groove (124). The bottom of the slider (4) has a second motor (41). The output end of the second motor (41) is equipped with a self-tapping part (6). The self-tapping part (6) has an external thread that matches the internal thread in the second through hole (141).

4. The automated sampling device for tunnel inspection according to claim 1, characterized in that, One end of the frame (1) is provided with a power quick connector (15).

5. The automated sampling device for tunnel inspection according to claim 1, characterized in that, One end of the frame (1) is provided with a water pipe quick connector (16), and the bottom of the frame (1) is provided with a plurality of nozzles (9) arranged around the first through hole (13). The nozzles (9) and the water pipe quick connector (16) are connected by a pipe arranged inside the frame (1).

6. The automated sampling device for tunnel inspection according to claim 1, characterized in that, The number and position of the track wheels (5) are matched with the negative pressure device (2).

7. The automated sampling device for tunnel inspection according to claim 1, characterized in that, A sealing strip (7) is provided around the negative pressure hole (11) on the back of the frame (1).

8. The automated sampling device for tunnel inspection according to claim 1, characterized in that, A picking mechanism (8) is provided on the frame (1) on the side of the drive bracket (12).

9. The automated sampling device for tunnel inspection according to claim 1, characterized in that, The negative pressure device (2) is a fan.

10. A method of using an automated sampling device, for use with the automated sampling device for tunnel detection as described in any one of claims 1 to 9, characterized in that, Including the following steps: S1: Select the number of drill rod segments (322) according to the lining depth. Utilize the snap-fit ​​relationship between the first snap-fit ​​block (3221) and the first snap-fit ​​groove (3211) to install one set of drill rod segments (322) on the connecting mechanism (321). Then, sequentially snap-fit ​​the other drill rod segments (322) using the first snap-fit ​​block (3221) and the second snap-fit ​​groove (3222) provided on them. Finally, snap-fit ​​each set of drill bit segments (323) onto the last set of drill rod segments (322) to complete the assembly of the sampling mechanism (32). S2: Place the automated sampling device on the tunnel wall and then connect the power cord and water pipe as needed via power quick connector (15) and water pipe quick connector (16); S3: Start the negative pressure device (2) and control the automated sampling device to move to the sampling area through the remote control device; S4: Start the second motor (41) to allow the self-tapping part (6) to penetrate the surrounding rock of the tunnel and fix the frame (1). Then start the first motor (121) to allow the tip of the drill bit split (323) to contact the tunnel wall. S5: Turn on the third motor (31). If the water pipe is connected, turn on the external water source at the same time, so that the nozzle (9) sprays water while the sampling mechanism (32) starts to rotate. S6: Activate the automatic sampling mode, allowing the system to automatically control the first motor (121) and the third motor (31) to allow the automated sampling device to perform sampling operations automatically; after sampling is completed, the system controls the first motor (121), the second motor (41) and the third motor (31) to reverse, allowing the self-tapping part (6) and the sampling mechanism (32) to rotate out from inside the tunnel wall; S7: Control the automated sampling device to return to the ground, pull out the drill rod split (322) and drill bit split (323) to obtain the sample.

Images