Intelligent drilling and checking device for drilling and blasting tunnel

Abstract

This application provides an intelligent borehole inspection device for drill-and-blast tunnels, including a support, a marking component, an alignment block, and a measuring component. The support has a positioning frame that can swing to be parallel to the working face. The marking component is located on the outer side of the positioning frame for marking reference points on the working face. The alignment block is located inside the positioning frame and has degrees of freedom to move along the height and width directions of the positioning frame. The alignment block has a depth-measuring component that can be inserted into and abut against the bottom of the borehole. The measuring component is located on the alignment block for measuring the horizontal and vertical distances between the borehole and the reference points. In practical use, by moving the alignment block and adjusting the depth-measuring component, the position of the alignment block relative to the borehole can be locked, and relevant data can be obtained. The intelligent borehole inspection device for drill-and-blast tunnels provided by this application can quickly measure the borehole depth and the distance between the borehole and the reference point, thereby enabling comparison with the estimated data and achieving the purpose of borehole inspection.

Description

Technical Field

[0001] This application belongs to the field of borehole inspection technology, specifically relating to an intelligent borehole inspection device for drill-blast tunnels. Background Technology

[0002] Drill-and-blast method (DBM) is an underground engineering excavation method that uses drilling and explosives to break up rock masses. It is mainly used in tunnel and mine construction. The typical process of DBM includes: hole layout, drilling, charging explosives, and blasting. To ensure the blasting effect, an additional hole inspection step is usually added after drilling and before charging to ensure the borehole meets requirements.

[0003] The conventional method for inspecting boreholes involves finding a reference point on the construction surface, then measuring the distance between the borehole and the reference point using a tape measure and measuring the borehole depth using a ruler. The inventors discovered that manual measurement is inefficient and prone to errors, especially when the borehole is far from the reference point, where the error can directly affect the reliability of the inspection results. Utility Model Content

[0004] This application provides an intelligent borehole inspection device for drill-blast tunnels, which aims to quickly measure the borehole depth and the distance between the borehole and the reference point, thereby enabling comparison with the estimated data to achieve the purpose of borehole inspection.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] A smart borehole inspection device for drill-and-blast tunnels is provided, comprising:

[0007] A bracket is used to fix the bottom of the tunnel and is set towards the construction face; the inner side of the bracket has a positioning frame, which has a degree of freedom to swing relative to the bracket, and the swing axis is parallel to the horizontal plane;

[0008] A marking component, disposed on the outer side of the positioning frame, is used to mark reference points on the construction surface;

[0009] An alignment block is disposed inside the positioning frame and has degrees of freedom to move along the height and width directions of the positioning frame; the alignment block has a depth measuring component for inserting into the borehole and abutting the bottom of the borehole to obtain the borehole depth; and a positioning component is disposed on the alignment block for measuring the distance the alignment block moves relative to the height and width directions of the positioning frame to obtain the horizontal and vertical spacing of the borehole relative to the reference point.

[0010] In one possible implementation, a guide rod is slidably provided on the inner side of the positioning frame; the sliding direction of the guide rod is parallel to the height direction of the positioning frame, and the length direction of the guide rod is parallel to the width direction of the positioning frame.

[0011] The alignment block is slidably connected to the guide rod, and the sliding direction is parallel to the length direction of the guide rod.

[0012] In one possible implementation, the positioning frame has a strip groove on one of its inner sides facing its own width direction; the strip groove extends along the height direction of the positioning frame, and the end of the guide rod has a slider that is slidably disposed in the strip groove;

[0013] The slider is provided with a transmission nut, the axis of which is parallel to the height direction of the positioning frame; a drive screw is rotatably disposed in the strip groove, the upper end of which passes through the positioning frame and extends out, and the drive screw is threadedly connected to the transmission nut.

[0014] In one possible implementation, the depth sounding component includes:

[0015] A linear cylinder is mounted on the alignment block; the power output axis of the linear cylinder is parallel to the thickness direction of the positioning frame, and the power output end is positioned away from the alignment block; and a pressure sensor is mounted on the power output end of the linear cylinder, for inserting into the drill hole along with the power output axis of the linear cylinder and abutting against the bottom of the drill hole.

[0016] The signal output module of the pressure sensor is electrically connected to the control module of the linear cylinder, so that when the pressure sensor comes into contact with the bottom of the borehole, the linear cylinder stops and can output the movement of its power output shaft.

[0017] In one possible implementation, the positioning component includes:

[0018] A turntable is rotatably mounted on the alignment block, with its rotation axis parallel to the thickness direction of the positioning frame; and an infrared ranging sensor is mounted on the turntable to output infrared light from the rotation axis facing away from the turntable in order to obtain the corresponding distance value.

[0019] The turntable can be rotated so that the infrared output direction of the infrared ranging sensor is parallel to the horizontal or vertical direction.

[0020] In one possible implementation, the positioning frame is provided with a horizontal stop bar and a vertical stop bar;

[0021] The horizontal baffle extends along the width direction of the positioning frame and is arranged side by side with the marking component along the width direction of the positioning frame;

[0022] The vertical baffle extends along the height direction of the positioning frame and is arranged side by side with the marking component along the height direction of the positioning frame;

[0023] Specifically, when the infrared output direction of the infrared ranging sensor is parallel to the horizontal or vertical direction, the infrared ranging sensor can obtain the distance between the alignment block and the vertical or horizontal stop bar.

[0024] In one possible implementation, the alignment block has two limiting pads spaced apart around the rotation axis of the turntable. The limiting pads are made of an elastic material and are adapted to be embedded in the inner side of the turntable. The inner side of the turntable has a limiting groove adapted for the limiting pads to be embedded in.

[0025] In one possible implementation, the positioning frame has a mounting hole extending along its thickness direction, and the marking assembly includes a laser emitter fixedly inserted into the mounting hole.

[0026] In one possible implementation, the positioning frame and the bracket have a locking structure for engaging the positioning frame with the bracket to limit the swing of the positioning frame;

[0027] The locking structure includes:

[0028] An arc-shaped washer is disposed on the outer side of the bracket and extends circumferentially along the rotation axis of the positioning frame; and a swing arm is coaxially connected to the rotation axis of the positioning frame and located on the outside of the bracket; a positioning nut is fixedly disposed on the swing arm, and a locking bolt is threadedly connected to the positioning nut, and the locking bolt is adapted to be screwed into abutting the arc-shaped washer.

[0029] In one possible implementation, the bottom of the support is detachably connected to a movable seat, which is used to move along the bottom surface of the tunnel to drive the support to translate.

[0030] In this embodiment, by fixing the bracket to the bottom of the tunnel facing the construction face, and then controlling the positioning frame to swing relative to the bracket, the outer side of the positioning frame can be set parallel to the construction face. Based on this, a reference point can be marked on the construction face using a marking component; then, by moving the alignment block, the depth sounding component can be inserted into the borehole and abut against the bottom of the borehole to fix the alignment block relative to the borehole; simultaneously, the depth sounding component can determine the borehole depth, and the positioning component can be used to determine the horizontal and vertical distances of the borehole relative to the reference point.

[0031] The intelligent borehole inspection device for drill-blast tunnels provided in this embodiment is simple and direct to operate compared with the prior art. It can quickly measure the borehole depth and the distance between the borehole and the reference point, thereby comparing the obtained values ​​with the estimated data to achieve the purpose of borehole inspection. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is one of the three-dimensional structural schematic diagrams of the intelligent borehole inspection device for drill-and-blast tunnels provided in the embodiments of this application;

[0034] Figure 2 A second three-dimensional structural schematic diagram of the intelligent borehole inspection device for drill-blast tunnels provided in the embodiments of this application;

[0035] Figure 3 for Figure 2 A magnified view of a portion of the middle circle A;

[0036] Figure 4 This is a partial schematic diagram of the positioning frame and drive screw used in the embodiments of this application from an explosion perspective;

[0037] Figure 5 This is a partial schematic diagram of the alignment block and guide rod used in the embodiments of this application in the combined state;

[0038] Figure 6 This is a top view of the alignment block, depth measuring component, and positioning component used in the embodiments of this application in a combined state.

[0039] Figure 7 For along Figure 6 Cross-sectional view of the middle BB line;

[0040] Figure 8 This is an exploded structural diagram of the positioning component used in the embodiments of this application;

[0041] Figure 9 This is a partial schematic diagram of the positioning frame and marking components used in the embodiments of this application in a combined state;

[0042] Figure 10 This is a partially enlarged schematic diagram of the positioning frame and marking components used in the embodiments of this application from an exploded view.

[0043] Figure 11This is a partially enlarged schematic diagram of the locking structure used in the embodiments of this application from an explosion perspective;

[0044] Figure 12 This is a partial schematic diagram of the support and movable base used in the embodiments of this application from an exploded perspective;

[0045] Explanation of reference numerals in the attached drawings: 1. Bracket; 2. Positioning frame; 21. Strip groove; 22. Drive screw; 23. Horizontal stop bar; 24. Vertical stop bar; 25. Mounting hole; 3. Alignment block; 31. Limiting washer; 4. Depth measuring component; 41. Linear cylinder; 42. Pressure sensor; 5. Position measuring component; 51. Turntable; 511. Limiting groove; 52. Infrared ranging sensor; 6. Guide rod; 61. Slider; 611. Transmission nut; 7. Locking structure; 71. Arc-shaped washer; 72. Swing arm; 721. Positioning nut; 722. Locking bolt; 8. Moving seat; 9. Marking assembly. Detailed Implementation

[0046] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0047] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0048] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0050] Please refer to the following: Figures 1 to 12The intelligent borehole inspection device for drill-and-blast tunnels provided in this application will now be described. The intelligent borehole inspection device for drill-and-blast tunnels proposed in this application includes a support 1, a marking component 9, an alignment block 3, and a positioning component 5.

[0051] The bracket 1 is used to fix the bottom of the tunnel and is set towards the construction face; in this embodiment, the bracket 1 includes a base plate and two vertical plates respectively fixed on both sides of the base plate, and the two vertical plates and the base plate together form a U-shaped structure.

[0052] The bracket 1 has a positioning frame 2 on its inner side, which is positioned between the two vertical plates. The positioning frame 2 and the bracket 1 are rotatably connected; that is, the positioning frame 2 has connecting rods on both sides facing its own width direction. These connecting rods pass through the two vertical plates and extend outwards, thus achieving the rotatable connection between the positioning frame 2 and the bracket 1. Based on this, the positioning frame 2 has a degree of freedom to swing relative to the bracket 1, and the swing axis is parallel to the horizontal plane (the width direction of the positioning frame 2), so that the side of the positioning frame 2 facing its own thickness direction is parallel to the construction surface.

[0053] The marking component 9 is set on the outer side of the positioning frame 2, that is, on the side of the positioning frame 2 facing the construction surface. This marking component 9 is used to mark the reference point on the construction surface. Under normal circumstances, the reference point is close to the lower left corner of the construction surface. This position is designed with reference to the height of the marking component 9 fixed on the side of the construction surface. That is to say, under normal circumstances, when the bracket 1 is fixed on the side of the construction surface and the outer side of the positioning frame 2 is parallel to the construction surface, the marking component 9 can place the mark on the reference point designed on the construction surface without adjustment. Its marking purpose is to confirm that the reference point design is correct and that the fixed position of the device and the adjustment of related components are correct.

[0054] The alignment block 3 is located inside the positioning frame 2 and has the freedom to move along the height and width directions of the positioning frame 2.

[0055] The alignment block 3 has a depth measuring component 4, which is used to insert into the borehole and abut against the bottom of the borehole to obtain the borehole depth.

[0056] The measuring component 5 is set on the alignment block 3 and is used to measure the distance that the alignment block 3 moves relative to the positioning frame 2 in the height and width directions, so as to obtain the horizontal and vertical spacing of the drill hole relative to the reference point.

[0057] In this embodiment, by fixing the bracket 1 to the bottom of the tunnel and facing the construction face, and then controlling the positioning frame 2 to swing relative to the bracket 1, the outer side of the positioning frame 2 can be set parallel to the construction face. Based on this, the marking component 9 can mark a reference point on the construction face; then, by moving the alignment block 3, the depth measuring component 4 can be inserted into the borehole and abut against the bottom of the borehole to fix the alignment block 3 relative to the borehole; simultaneously, the depth measuring component 4 can determine the borehole depth, and the positioning component 5 can determine the horizontal and vertical distances of the borehole relative to the reference point.

[0058] The intelligent borehole inspection device for drill-blast tunnels provided in this embodiment is simple and direct to operate compared with the prior art. It can quickly measure the borehole depth and the distance between the borehole and the reference point, thereby comparing the obtained values ​​with the estimated data to achieve the purpose of borehole inspection.

[0059] In some embodiments, such as Figure 1 and Figure 5 As shown, a guide rod 6 is slidably provided on the inner side of the positioning frame 2; the sliding direction of the guide rod 6 is parallel to the height direction of the positioning frame 2, and the length direction of the guide rod 6 is parallel to the width direction of the positioning frame 2.

[0060] The alignment block 3 is slidably connected to the guide rod 6, and the sliding direction is parallel to the length direction of the guide rod 6, so as to realize the movement of the alignment block 3 relative to the positioning frame 2 in the height and width directions.

[0061] In some embodiments, such as Figure 1 , Figure 4 and Figure 5 As shown, the positioning frame 2 has a strip groove 21 on one of its inner sides facing its own width direction; the strip groove 21 extends along the height direction of the positioning frame 2, and the end of the guide rod 6 has a slider 61 that is slidably disposed in the strip groove 21 to realize the sliding connection between the guide rod 6 and the positioning frame 2.

[0062] Based on the foregoing, a transmission nut 611 is fixedly mounted on the slider 61, and the axial direction of the transmission nut 611 is parallel to the height direction of the positioning frame 2. Furthermore, a drive screw 22 is rotatably mounted within the strip groove 21, with its upper end penetrating the positioning frame 2 and extending out (the extended end has a handle). The drive screw 22 is threadedly connected to the transmission nut 611, so that when the drive screw 22 rotates, the guide rod 6 rises and falls synchronously.

[0063] In some embodiments, such as Figure 1 , Figure 5 and Figure 6 As shown, the depth measuring component 4 includes a linear cylinder 41 and a pressure sensor 42.

[0064] A linear cylinder 41 is mounted on the alignment block 3. Specifically, the alignment block 3 has a recessed groove, and the base of the linear cylinder 41 is embedded in this recessed groove and connected to the outer side of the alignment block 3 through a limiting bracket. After the linear cylinder 41 is fixed to the alignment block 3, the power output axis of the linear cylinder 41 is parallel to the thickness direction of the positioning frame 2, and the power output end is positioned away from the alignment block 3, that is, the power output shaft can move towards or away from the alignment block 3.

[0065] A pressure sensor 42 is installed at the power output end of the linear cylinder 41. It is inserted into the borehole along with the power output shaft of the linear cylinder 41 and abuts against the bottom of the borehole. After the pressure sensor 42 abuts against the bottom of the borehole, its pressure value changes. When the pressure value reaches a specific value, the extension of the linear cylinder 41 corresponds to the borehole depth. In the calculation, the distance between the power output end of the linear cylinder 41 and the working surface in its original state needs to be taken into account; that is, the extension of the linear cylinder 41 minus this distance value yields the borehole depth.

[0066] Based on the foregoing, the signal output module of the pressure sensor 42 is electrically connected to the control module of the linear cylinder 41 so that when the pressure sensor 42 abuts against the bottom of the borehole and the value of the pressure sensor 42 reaches a preset value, the linear cylinder 41 stops. The linear cylinder 41 can output the movement of its power output shaft to the outside (such as a handheld display screen or mobile phone of the operator) and the borehole depth can be calculated.

[0067] In some embodiments, such as Figure 3 and Figure 8 As shown, the positioning component 5 includes a turntable 51 and an infrared ranging sensor 52.

[0068] The turntable 51 is rotatably mounted on the alignment block 3, and the rotation axis is parallel to the thickness direction of the positioning frame 2.

[0069] An infrared ranging sensor 52 is mounted on a turntable 51 and is used to output infrared light from the rotating shaft facing away from the turntable 51 to obtain the corresponding distance value.

[0070] In actual use, the turntable 51 can be rotated until the infrared output direction of the infrared ranging sensor 52 is parallel to the horizontal or vertical direction, thereby measuring the position information relative to the marker component 9 at that position.

[0071] In some embodiments, such as Figure 2 , Figure 3 and Figure 9 As shown, the positioning frame 2 is provided with a horizontal stop bar 23 and a vertical stop bar 24.

[0072] The horizontal stop bar 23 extends along the width direction of the positioning frame 2 and is arranged side by side with the marking component 9 along the width direction of the positioning frame 2.

[0073] The vertical baffle 24 extends along the height direction of the positioning frame 2 and is arranged side by side with the marking component 9 along the height direction of the positioning frame 2.

[0074] By adopting the above technical solution, when the infrared output direction of the infrared ranging sensor 52 is parallel to the horizontal direction, the infrared ranging sensor 52 can obtain the distance between the alignment block 3 and the vertical stop bar 24; when the infrared output direction of the infrared ranging sensor 52 is parallel to the vertical direction, the infrared ranging sensor 52 can obtain the distance between the alignment block 3 and the horizontal stop bar 23; since the relative positions of the vertical stop bar 24 and the marking component 9, and the relative positions of the horizontal stop bar 23 and the marking component 9 are fixed, these two sets of values ​​can be calculated and applied to the coordinate system with the marking point (reference point) as the origin to achieve the purpose of hole verification.

[0075] In some embodiments, such as Figure 3 , Figure 7 and Figure 8 As shown, the alignment block 3 has two limiting pads 31 spaced apart around the rotation axis of the turntable 51. These limiting pads 31 are made of elastic material to ensure that they do not affect the rotation of the turntable 51 when it rotates, and they can be embedded into the inner side of the turntable 51. A limiting groove 511 is provided on the inner side of the turntable 51 for the limiting pads 31 to be embedded in. Specifically: when the turntable 51 rotates to the position where the infrared ranging sensor 52 faces horizontally, the first limiting pad 31 is embedded in the limiting groove 511; when the turntable 51 rotates to the position where the infrared ranging sensor 52 faces vertically, the second limiting pad 31 is embedded in the limiting groove 511.

[0076] By adopting the above technical solution, when the turntable 51 is manually rotated into position, the operator will feel a jolt in their hand. At this time, the operator can be reminded to stop the operation and record the value obtained by the infrared ranging sensor 52.

[0077] In some embodiments, such as Figure 10 As shown, the positioning frame 2 has a mounting hole 25 extending along its thickness direction. The marking assembly 9 includes a laser emitter, which is fixedly inserted into the mounting hole 25, so that when the outer side of the positioning frame 2 is parallel to the construction surface, the laser emitter can emit laser markings vertically on the construction surface.

[0078] In some embodiments, such as Figure 1 , Figure 2 and Figure 11 As shown, the positioning frame 2 and the bracket 1 have a locking structure 7, which is used to connect the positioning frame 2 and the bracket 1 to limit the swing of the positioning frame 2.

[0079] In this embodiment, the locking structure 7 includes an arc-shaped pad 71 and a swing arm 72.

[0080] The arc-shaped pad 71 is disposed on the outer side of the bracket 1 and extends circumferentially along the rotation axis of the positioning frame 2.

[0081] The swing arm 72 is coaxially connected to the rotation axis of the positioning frame 2 and is located outside the bracket 1.

[0082] A positioning nut 721 is fixedly installed on the swing arm 72. A locking bolt 722 is threaded onto the positioning nut 721, and the locking bolt 722 is adapted to be screwed into the arc-shaped washer 71.

[0083] Based on this, the arc-shaped gasket 71 can be made of a material with a relatively rough surface or an elastic material. When the arc-shaped gasket 71 is made of a material with a relatively rough surface, after the end of the locking bolt 722 is connected to the arc-shaped gasket 71, the swing arm 72 is limited under the action of friction, thereby locking the swing angle of the positioning frame 2. When the arc-shaped gasket 71 is made of an elastic material, the end of the locking bolt 722 can press the arc-shaped gasket 71 to make the surface of the arc-shaped gasket 71 concave, thereby limiting the swing arm 72 under the contact force generated by the concave, thereby locking the swing angle of the positioning frame 2.

[0084] In some embodiments, such as Figure 1 and Figure 12 As shown, a movable seat 8 is detachably connected to the bottom of the support 1. The movable seat 8 is used to move along the bottom surface of the tunnel to drive the support 1 to translate.

[0085] By using the movable base 8 to contact the tunnel floor, the support 1 can be easily moved; and the bottom of the movable base 8 is equipped with tracked wheels to ensure the stability of the support 1 in a fixed state. In actual use, the movable base 8 of different heights can be selected according to different construction surface conditions, so that the device can be adapted to different working conditions.

[0086] The above content is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An intelligent borehole inspection device for drill-and-blast tunnels, characterized in that, include: A bracket is used to fix the bottom of the tunnel and is set towards the construction face; the inner side of the bracket has a positioning frame, which has a degree of freedom to swing relative to the bracket, and the swing axis is parallel to the horizontal plane; A marking component, disposed on the outer side of the positioning frame, is used to mark reference points on the construction surface; An alignment block is disposed inside the positioning frame and has degrees of freedom to move along the height and width directions of the positioning frame; the alignment block has a depth measuring component for inserting into the borehole and abutting the bottom of the borehole to obtain the borehole depth; and a positioning component is disposed on the alignment block for measuring the distance the alignment block moves relative to the height and width directions of the positioning frame to obtain the horizontal and vertical spacing of the borehole relative to the reference point.

2. The intelligent borehole inspection device for drill-and-blast tunnels as described in claim 1, characterized in that, A guide rod is slidably provided on the inner side of the positioning frame; the sliding direction of the guide rod is parallel to the height direction of the positioning frame, and the length direction of the guide rod is parallel to the width direction of the positioning frame. The alignment block is slidably connected to the guide rod, and the sliding direction is parallel to the length direction of the guide rod.

3. The intelligent borehole inspection device for drill-and-blast tunnels as described in claim 2, characterized in that, The positioning frame has a strip groove on one of its inner sides facing its own width direction; the strip groove extends along the height direction of the positioning frame, and the end of the guide rod has a slider that is slidably disposed in the strip groove; The slider is provided with a transmission nut, the axis of which is parallel to the height direction of the positioning frame; a drive screw is rotatably disposed in the strip groove, the upper end of which passes through the positioning frame and extends out, and the drive screw is threadedly connected to the transmission nut.

4. The intelligent borehole inspection device for drill-and-blast tunnels as described in claim 1, characterized in that, The depth-sounding component includes: A linear cylinder is mounted on the alignment block; the power output axis of the linear cylinder is parallel to the thickness direction of the positioning frame, and the power output end is positioned away from the alignment block; and a pressure sensor is mounted on the power output end of the linear cylinder, for inserting into the drill hole along with the power output axis of the linear cylinder and abutting against the bottom of the drill hole. The signal output module of the pressure sensor is electrically connected to the control module of the linear cylinder, so that when the pressure sensor comes into contact with the bottom of the borehole, the linear cylinder stops and can output the movement of its power output shaft.

5. The intelligent borehole inspection device for drill-and-blast tunnels as described in claim 1, characterized in that, The positioning component includes: A turntable is rotatably mounted on the alignment block, with its rotation axis parallel to the thickness direction of the positioning frame; and an infrared ranging sensor is mounted on the turntable to output infrared light from the rotation axis facing away from the turntable in order to obtain the corresponding distance value. The turntable can be rotated so that the infrared output direction of the infrared ranging sensor is parallel to the horizontal or vertical direction.

6. The intelligent borehole inspection device for drill-and-blast tunnels as described in claim 5, characterized in that, The positioning frame is provided with horizontal and vertical baffles; The horizontal baffle extends along the width direction of the positioning frame and is arranged side by side with the marking component along the width direction of the positioning frame; The vertical baffle extends along the height direction of the positioning frame and is arranged side by side with the marking component along the height direction of the positioning frame; Specifically, when the infrared output direction of the infrared ranging sensor is parallel to the horizontal or vertical direction, the infrared ranging sensor can obtain the distance between the alignment block and the vertical or horizontal stop bar.

7. The intelligent borehole inspection device for drill-and-blast tunnels as described in claim 5, characterized in that, The alignment block has two limiting pads spaced apart around the rotation axis of the turntable. The limiting pads are made of elastic material and are suitable for embedding into the inner side of the turntable. The inner side of the turntable is provided with a limiting groove suitable for embedding the limiting pads.

8. The intelligent borehole inspection device for drill-and-blast tunnels as described in claim 1, characterized in that, The positioning frame has a mounting hole extending along its thickness direction, and the marking assembly includes a laser emitter that is fixedly inserted into the mounting hole.

9. The intelligent borehole inspection device for drill-and-blast tunnels as described in claim 1, characterized in that, The positioning frame and the bracket have a locking structure, which is used to connect the positioning frame to the bracket to limit the swing of the positioning frame; The locking structure includes: An arc-shaped washer is disposed on the outer side of the bracket and extends circumferentially along the rotation axis of the positioning frame; and a swing arm is coaxially connected to the rotation axis of the positioning frame and located on the outside of the bracket; a positioning nut is fixedly disposed on the swing arm, and a locking bolt is threadedly connected to the positioning nut, and the locking bolt is adapted to be screwed into abutting the arc-shaped washer.

10. The intelligent borehole inspection device for drill-and-blast tunnels as described in claim 1, characterized in that, The bottom of the support is detachably connected to a movable seat, which is used to move along the bottom surface of the tunnel to drive the support to move horizontally.

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