A drilling camera depth recorder fixing device

Abstract

This invention discloses a fixing device for a borehole camera depth recorder, belonging to the field of borehole inspection. It includes a dual-chuck linkage structure coaxially positioned inside the borehole, an L-shaped external extension bracket located outside the borehole and fixedly connected to the dual-chuck linkage structure, and a roller-type depth sensor fixed to the top of the L-shaped external extension bracket. One end of a push rod passes through the roller of the roller-type depth sensor, then through the central hole of the dual-chuck linkage structure, and connects to the probe. Both the probe and the roller-type depth sensor are electrically connected to the depth recorder. Using this fixing device for a borehole camera depth recorder achieves stable, widely adaptable, portable, and accurate borehole inspection.

Description

Technical Field

[0001] This invention relates to the field of borehole inspection technology, and in particular to a fixing device for a borehole camera depth recorder. Background Technology

[0002] Borehole camera inspection technology is a commonly used non-destructive testing method in fields such as engineering construction and geological exploration. By sending a depth recorder equipped with a camera component into the borehole, key information such as the rock mass structure, fracture development, and defect distribution of the borehole wall can be obtained directly. Its detection accuracy directly depends on the fixed stability of the recorder and the accuracy of depth measurement.

[0003] Currently, the mainstream fixing devices for borehole camera depth recorders in the industry mainly include mechanical chuck type, locking nut type, and hydraulic arc plate clamping type structures: Mechanical chuck type devices achieve fixing by manually adjusting the clamping arm, which is cumbersome to operate and the clamping force cannot be precisely controlled; Locking nut type fixing devices rely on the radial contraction of the frustum-shaped hollow structure to achieve locking, which has a narrow range of applicable hole diameters and is prone to damage to soft rock hole walls; Hydraulic arc plate clamping devices can achieve a large clamping force, but they are mostly line contact fixing, which is prone to unstable fixing and device displacement when facing different hole diameters, irregular hole walls, or inclined drilling, resulting in blurred images and data distortion. Summary of the Invention

[0004] The purpose of this invention is to provide a fixing device for a borehole camera depth recorder, thereby solving the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides a drilling camera depth recorder fixing device, including a double chuck linkage structure coaxially positioned inside the borehole, an L-shaped external extension bracket located outside the borehole and fixedly connected to the double chuck linkage structure, and a roller-type depth sensor fixed to the top of the L-shaped external extension bracket. One end of a push rod passes through the roller of the roller-type depth sensor, then through the central hole of the double chuck linkage structure, and is connected to the probe. Both the probe and the roller-type depth sensor are electrically connected to the depth recorder.

[0006] Preferably, the dual chuck linkage structure includes an outer chuck and an inner chuck that are coaxially fixed and linked. Both the outer chuck and the inner chuck include a chuck body and multiple sets of positioning components that are radially telescopically arranged on the surface of the chuck body via a drive component. The multiple sets of positioning components are evenly arranged around the circumference of the chuck body.

[0007] Preferably, the chuck body includes a cover and a driven gear rotatably disposed inside the locking plate. The driven gear has transmission teeth on its outer circumferential side and a spiral thread on its end face side.

[0008] The drive assembly includes a drive head and a linkage shaft with one end fixedly connected to the output end of the drive head. The other end of the linkage shaft passes through the outer chuck and then enters the housing of the inner chuck. A drive gear is coaxially connected to the linkage shaft at the positions of the driven gears of the outer chuck and the inner chuck, respectively. The drive gear meshes with the driven gear.

[0009] The positioning assembly includes a slider that is slidably disposed in the threaded groove of the spiral thread and a positioning claw that is detachably disposed on the slider. The slider is also radially slidably connected to the housing.

[0010] Preferably, the positioning claw of one of the multiple positioning components located on the same chuck body has a positioning tip on the side facing the inner wall of the borehole, and the positioning claws of the other positioning components are arranged in an arc shape that adapts to the inner wall of the borehole.

[0011] Preferably, the cover is a split structure, and the cover includes a locking shell and a cover plate fixed to the locking shell.

[0012] Preferably, the drive head is a drive motor or a drive handwheel.

[0013] Preferably, the outer chuck and the inner chuck are connected on opposite sides by multiple parallel fixed shafts.

[0014] Therefore, the present invention employs the above-mentioned fixing device for a borehole camera depth recorder, which has the following beneficial effects:

[0015] 1. Significantly improved stability: The dual chuck linkage structure achieves both radial and axial locking, and the positioning claws penetrate deep into the rock mass and limit the embedding depth, preventing the device from shaking, shifting or tipping over during the test.

[0016] 2. Wide range of hole conditions and diameters: The L-shaped external extension bracket is suitable for incomplete holes, uneven holes and narrow working spaces. The positioning claw is retractable and can be replaced according to the drilling specifications, fully covering hole diameter requirements from 75mm to 150mm.

[0017] 3. Optimization of test repeatability and data consistency: The positioning claw leaves a permanent mark on the rock surface, ensuring that the initial position of multiple tests corresponds accurately and avoiding positional deviation during data processing;

[0018] 4. Improved portability and ease of operation: The device is modularly integrated and can be carried separately from the depth recorder, making it small and lightweight; it supports both manual and electric drive, and the installation and debugging process is standardized, reducing the operational threshold.

[0019] 5. Enhanced operational safety: No need for manual stepping to secure the equipment, avoiding the risk of water ingress due to ground water accumulation, reducing rock dust contamination of the rollers, and lowering safety hazards for personnel working at heights and in confined spaces.

[0020] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a drilling camera depth recorder fixing device according to the present invention (without protective cover);

[0022] Figure 2 This is a schematic diagram of the structure of the drilling camera depth recorder fixing device of the present invention after removing the push rod and probe;

[0023] Figure 3 This is a cross-sectional view of the dual-chuck linkage structure of a drilling camera depth recorder fixing device according to the present invention;

[0024] Figure 4 This is a schematic diagram of the chuck body of a drilling camera depth recorder fixing device according to the present invention;

[0025] Figure 5 This is an overall external view of the fixing device for a borehole camera depth recorder according to the present invention.

[0026] Figure Labels

[0027] 1. L-shaped external extension bracket; 2. Double chuck linkage structure; 21. Drive head; 22. Linkage shaft; 23. Outer chuck; 24. Inner chuck; 25. Fixed shaft; 26. Spiral thread; 27. Driven gear; 28. Drive gear; 29. ​​Slider; 210. Positioning claw; 3. Probe; 4. Roller-type depth sensor; 5. Push rod; 6. Protective cover. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of this application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0029] It should be noted that the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, such as a process, method, system, product, or server that includes a series of steps or units, not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or device.

[0030] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0031] like Figures 1-5 As shown, a drilling camera depth recorder fixing device includes a double chuck linkage structure 2 coaxially positioned inside the borehole, an L-shaped external extension bracket 1 located outside the borehole and fixedly connected to the double chuck linkage structure 2, and a roller-type depth sensor 4 fixed to the top of the L-shaped external extension bracket 1. One end of a push rod 5 passes through the roller of the roller-type depth sensor 4, then through the central hole of the double chuck linkage structure 2, and is connected to a probe 3. Both the probe 3 and the roller-type depth sensor 4 are electrically connected to the depth recorder.

[0032] The dual chuck linkage structure 2 includes an outer chuck 23 and an inner chuck 24 that are coaxially fixed and linked. Both the outer chuck 23 and the inner chuck 24 include a chuck body and multiple sets of positioning components that are radially telescopically set on the surface of the chuck body by a drive component. The multiple sets of positioning components are evenly arranged around the circumference of the chuck body.

[0033] The chuck body includes a cover and a driven gear 27 rotatably disposed inside the locking plate. The driven gear 27 has transmission teeth on its outer circumference and a spiral thread 26 on its end face. The drive assembly includes a drive head 21 and a linkage shaft 22 with one end fixedly connected to the output end of the drive head 21. The other end of the linkage shaft 22 passes through the outer chuck 23 and then into the cover of the inner chuck 24. A drive gear 28 is coaxially connected to the linkage shaft 22 at the positions corresponding to the driven gear 27 of the outer chuck 23 and the driven gear 27 of the inner chuck 24, respectively. The drive gear 28 meshes with the driven gear 27. The positioning assembly includes a slider 29 slidably disposed in the threaded groove of the spiral thread 26 and a positioning claw 210 detachably disposed on the slider 29. The slider 29 is also radially slidably connected to the cover.

[0034] One of the positioning components located on the same chuck body has a positioning tip on the side of its positioning claw 210 facing the inner wall of the borehole, while the positioning claws 210 of the other positioning components are arranged in an arc shape that adapts to the inner wall of the borehole.

[0035] The housing has a split structure, including a locking shell and a cover plate fixed to the locking shell.

[0036] The drive head 21 is either a drive motor or a drive handwheel.

[0037] The outer chuck 23 and the inner chuck 24 are connected on opposite sides by multiple parallel fixed shafts 25, which are arranged in parallel with the linkage shaft 22.

[0038] In this embodiment, a protective cover 6 is also provided on the outside of the dual chuck linkage structure 2. It is fixed to the outer chuck 23 and the inner chuck 24 with screws to prevent foreign objects from entering the dual chuck linkage structure 2 and causing the machine to stop.

[0039] Working method: Step 1, Preliminary preparation: Select the appropriate positioning claw 210 (suitable hole diameter range 75mm-150mm) according to the hole diameter specification to be tested, and fix the positioning claw 210 to the slider 29 with screws to ensure a firm connection.

[0040] Step 2, Installation of fixing device: The assembled double chuck linkage structure 2 is coaxially placed into the borehole, ensuring that the outer chuck 23 and the inner chuck 24 are parallel and coaxial through the fixing shaft 25. The L-shaped external extension bracket 1 naturally extends to a stable position outside the borehole and fits against the outer wall of the borehole.

[0041] Step 3, Probe 3 deployment: Accurately connect the test probe 3 to the signal line connector, check the connection stability, and then slowly use the push rod 5 to send the probe 3 through the roller of the roller-type depth sensor 4 and the center hole of the double chuck linkage structure 2 into the preset initial position of the drilling hole, so as to avoid the probe 3 from colliding and being damaged with the hole wall.

[0042] Step 4: Deploy and fix the positioning claw 210: Manually or electrically drive the linkage shaft 22 to rotate. The linkage shaft 22 drives the outer chuck 23 and the inner chuck 24 to rotate synchronously. The drive gear 28 meshes with the driven gear 27 to rotate, causing the slider 29 to slide radially outward along the spiral thread 26, thereby pushing the positioning claw 210 to extend and retract until it fits against the hole wall. At the same time, the positioning claw 210 with the positioning tip leaves a positioning mark on the surface of the rock mass of the hole wall.

[0043] Step 5: Stability test: Gently shake the L-shaped external extension bracket 1 and the double chuck linkage structure 2 in both radial and axial directions to confirm that the device has no displacement or loosening.

[0044] Step 6, Signal Connection and Debugging: Connect the signal cable of the depth recorder and the signal cable of probe 3 to the designated ports on the host respectively. Turn on the power of the host and the depth recorder, check the screen display status, and confirm that the video picture is clear and the depth data is being fed back normally.

[0045] Step 7, Depth Calibration and Testing: After the device display stabilizes, calibrate the initial depth to zero; press the host video recording button, and after "Start Recording" is displayed, push the push rod 5 at a slow and uniform speed to gradually send the probe 3 into the bottom of the hole. Monitor the depth data in real time during the process until the probe 3 reaches the bottom of the hole to complete the testing operation.

[0046] Step 8, Finishing Operation: After the test is completed, stop recording and turn off the power. Disconnect the signal line, push rod 5 or cable from the equipment in sequence. Reverse the operation of the drive component to make the positioning claw 210 retract and disengage from the hole wall. Take out the double chuck linkage structure 2 and the depth recorder. Clean the rock dust off the surface of the equipment and put it away.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A fixing device for a borehole camera depth recorder, characterized in that: It includes a dual chuck linkage structure coaxially positioned inside the borehole, an L-shaped external extension bracket located outside the borehole and fixedly connected to the dual chuck linkage structure, and a roller-type depth sensor fixed to the top of the L-shaped external extension bracket. One end of the push rod passes through the roller of the roller-type depth sensor and then through the central hole of the dual chuck linkage structure to connect with the probe. Both the probe and the roller-type depth sensor are electrically connected to the depth recorder. The dual chuck linkage structure includes an outer chuck and an inner chuck that are coaxially fixed and linked. Both the outer chuck and the inner chuck include a chuck body and multiple sets of positioning components that are radially telescopically set on the surface of the chuck body via a drive component. The multiple sets of positioning components are evenly arranged around the circumference of the chuck body. The chuck body includes a cover and a driven gear rotatably disposed inside the locking plate. The driven gear has transmission teeth on its outer circumference and a spiral thread on its end face. The drive assembly includes a drive head and a linkage shaft with one end fixedly connected to the output end of the drive head. The other end of the linkage shaft passes through the outer chuck and then enters the housing of the inner chuck. A drive gear is coaxially connected to the linkage shaft at the positions of the driven gears of the outer chuck and the inner chuck, respectively. The drive gear meshes with the driven gear. The positioning assembly includes a slider that is slidably disposed in the threaded groove of the spiral thread and a positioning claw that is detachably disposed on the slider. The slider is also radially slidably connected to the housing.

2. The drilling camera depth recorder fixing device according to claim 1, characterized in that: One of the positioning components on the same chuck body has a positioning tip on the side of its positioning claw facing the inner wall of the borehole, while the positioning claws of the other positioning components are arranged in an arc shape that matches the inner wall of the borehole.

3. The drilling camera depth recorder fixing device according to claim 1, characterized in that: The housing has a split structure, including a locking shell and a cover plate fixed to the locking shell.

4. The fixing device for a borehole camera depth recorder according to claim 1, characterized in that: The drive head is either a drive motor or a drive handwheel.

5. The fixing device for a borehole camera depth recorder according to claim 1, characterized in that: The outer chuck and the inner chuck are connected on opposite sides by multiple parallel fixed shafts.

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