Mine small diameter open hole detection device long distance conveying mechanism

Abstract

The present application belongs to the technical field of coal mine machinery, and aims to solve the problems of easy scratching with the inner wall of the naked eye, built-in power device and the like of the existing detection device. The present application provides a mine small-diameter naked-eye detection device long-distance conveying mechanism, a series type hinged connecting rod assembly can move along the axis of the naked eye to be detected relative to the support seat under the action of the external driving mechanism to enter the inside of the naked eye or exit the naked eye; the detection device carrying platform carries an instrument for detecting naked-eye parameters, the conveying depth monitoring mechanism is arranged at the wheel shaft position of the external driving mechanism and obtains the depth of the series type hinged connecting rod assembly into the naked eye based on the number of rotation turns of the wheel shaft; the mounting clamp seat is fixedly connected to one end of the support seat close to the naked eye entrance and is coaxially arranged with the naked eye. The present application avoids the invasion of the driving mechanism into the internal space of the naked eye through the external design of the driving mechanism; through the cooperation of the variable-diameter guide wheel set, the slip ring, the limiting block and the mounting clamp seat, the risk of scratching and damage of the detection device with the inner wall of the naked eye is reduced.

Description

Technical Field

[0001] This invention belongs to the field of coal mine machinery technology, specifically relating to a long-distance conveying mechanism for a small-diameter naked-eye detection device in mines. Background Technology

[0002] During mine mining and roadway maintenance, it is necessary to test parameters such as the internal wall condition and surrounding rock stability of small-diameter open holes (such as boreholes and exploration holes) to ensure mine operation safety.

[0003] In existing technologies, the conveying of detection devices mostly adopts the method of rigid rod pushing or the power system entering the naked eye together with the detection device. The former is limited by the length of the rod and cannot achieve long-distance conveying. Moreover, the rigid pushing is prone to scratching the inner wall of the naked eye, causing damage to the detection device. The latter's power system occupies the internal space of the naked eye, which not only interferes with the acquisition of detection signals, but also makes it difficult for the power components to dissipate heat due to the small diameter of the naked eye, affecting the stability of conveying.

[0004] Therefore, developing a conveying mechanism for small-diameter naked-eye detection devices in mines with an external power system and adjustable conveying depth has become an urgent technical problem to be solved in the field of coal mine detection equipment. Summary of the Invention

[0005] In order to solve at least one of the above-mentioned technical problems in the prior art, the present invention provides a long-distance conveying mechanism for a small-diameter naked-eye detection device in mines.

[0006] This invention is achieved using the following technical solution: a long-distance conveying mechanism for a small-diameter open-eye detection device in mines, comprising a support base, an external drive mechanism, a series articulated linkage assembly, a detection device mounting platform, a conveying depth monitoring mechanism, and a mounting clamp; the support base is placed outside the open-eye to be detected and serves as the supporting foundation for the conveying mechanism; the series articulated linkage assembly can move relative to the support base along the axial direction of the open-eye to be detected under the action of the external drive mechanism to enter or exit the open-eye; the series articulated linkage assembly includes multiple sets of articulated linkage assemblies, and the support base has a guide rail that restricts the radial displacement of the linkage assembly; the detection device mounting platform is placed at the front end of the foremost linkage assembly and carries an instrument for detecting open-eye parameters; the conveying depth monitoring mechanism is placed at the wheel axle position of the external drive mechanism and obtains the depth of the series articulated linkage assembly entering the open-eye based on the number of rotations of the wheel axle; the mounting clamp is fixed to the end of the support base near the open-eye entrance and is coaxially arranged with the open-eye.

[0007] Preferably, the series-connected articulated linkage assembly includes a joint group and a linkage assembly connected in series through the joint group. The linkage assembly includes a tubular member, a driven rack, a variable-diameter guide wheel group, a slip ring, and a limiting block. The driven rack is fixed to the outer wall of the tubular member along the axial direction and meshes with the drive gear of the external drive mechanism. Multiple wheel grooves are provided at intervals around the circumference of the tubular member. The variable-diameter guide wheel in the variable-diameter guide wheel group is disposed in the wheel groove and can extend or retract relative to the wheel groove. The slip ring is slidably disposed on the outer circumference of the tubular member and is limited to two axial positions by two sets of limiting blocks disposed on two adjacent tubular members. The slip ring can press the variable-diameter guide wheel group back into the wheel groove or release it from the wheel groove.

[0008] Preferably, the mounting bracket includes a stop ball, a compression spring, and a bracket body. The bracket body is an annular structure with a notch at the bottom, and its inner wall includes a cylindrical surface and a conical surface. Multiple compression springs are bolted at intervals along the circumferential direction of the cylindrical surface of the bracket body. A stop ball is fixed to the inner end of the compression spring, and in the initial state of spring compression, the stop ball extends out of the inner wall of the bracket body to block the slip ring. In the initial state of spring compression, the distance between the stop ball and the outer wall of the tubular component is greater than the thickness of the limiting block and less than the distance between the outer wall of the slip ring and the outer wall of the tubular component. The distance between the inner wall of the bracket body and the outer wall of the tubular component is greater than the distance between the outer wall of the slip ring and the outer wall of the tubular component.

[0009] Preferably, the slip ring is an annular sleeve structure with a notch at the bottom and its inner wall includes a cylindrical surface and a conical surface. The variable diameter guide wheel includes a roller and a return spring. The two ends of the return spring are respectively fixed to the wheel groove and the roller. The central axis of the roller is perpendicular to the central axis of the tubular component. The movement path of the slip ring can cover the position of the wheel groove. The two sets of limiting blocks corresponding to a slip ring are respectively located in front of the wheel groove on the tubular component where the slip ring is located and in front of the adjacent tubular component behind the slip ring.

[0010] Preferably, the support base includes a guide rail, a vertical support section, and a retractable pulley system. The guide rail is a semi-circular rail with a vertical section and is spaced laterally along the vertical support section. Multiple retractable pulley systems are spaced circumferentially along the inner wall of the guide rail. The wheel surfaces of the retractable pulley systems can abut against the outer wall of the tubular component and are positioned to avoid the limiting block. The guide rail, the external drive mechanism, and the mounting clamp are all connected to the vertical support section.

[0011] Preferably, the external drive mechanism includes a power unit and a drive gear connected to the power unit via belt drive. The external drive mechanism is located below the series articulated linkage assembly. The conveying depth monitoring mechanism includes an encoder and a programmable controller. The encoder is mounted on the shaft of the drive gear to collect the number of rotations in real time and transmit it to the programmable controller. The programmable controller calculates the depth of the series articulated linkage assembly entering the naked eye and can automatically control the start and stop of the power unit according to the preset detection depth value.

[0012] Compared with the prior art, the beneficial effects of the present invention are: This invention, through the external design of the drive mechanism, avoids the drive mechanism from intruding into the internal space of the naked eye. This not only avoids interfering with the signal acquisition of the detection device, but also solves the problem of heat dissipation difficulties of the power components in a confined space, thereby improving the reliability of the detection operation.

[0013] The series articulated connecting rod assembly allows for free adjustment of the extension depth via the drive mechanism, overcoming the length limitations of rigid rod conveying and meeting the needs of small-diameter naked-eye long-distance detection in mines.

[0014] By using a combination of variable diameter guide wheel assembly, slip ring, limit block, and mounting bracket, the friction during the conveying process can be effectively reduced, the risk of damage to the detection device from rubbing against the inner wall of the naked eye can be lowered, and the stability of the conveying process can be improved. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a partial sectional view of the overall structure of the present invention; Figure 2 yes Figure 1 Cross-sectional view at point AA; Figure 3 This is the front view of the support base; Figure 4 yes Figure 3 Cross-sectional view at point AA; Figure 5 This is a schematic diagram of the structure and connection of a series hinged linkage assembly; Figure 6 This is a schematic diagram of the installation of the variable diameter guide wheel assembly; Figure 7 This is a schematic diagram of the slip ring structure; Figure 8 This is a cross-sectional view of the slip ring; Figure 9 This is a side view of the installation diagram of the limit block. Figure 10 This is a schematic diagram of the installation of the limit block (front view); Figure 11 This is a sectional view (side view) of the mounting bracket; Figure 12 This is a sectional view (front view) of the mounting bracket; Figure 13 yes Figure 11 Enlarged diagram of the area circled in the middle.

[0017] In the diagram: 1-Support base; 1.1-Guide rail; 1.2-Retractable pulley block; 1.3-Mounting hole; 2-Power unit; 3-Series articulated linkage assembly; 3.1-Joint assembly; 3.2-Tube component; 3.3-Driven rack; 3.4-Variable diameter guide wheel assembly; 3.5-Slip ring; 3.6-First limit block; 3.7-Second limit block; 3.8-Roller; 3.9-Reset spring; 4-Drive gear; 5-Detection device mounting platform; 6-Conveying depth monitoring mechanism; 7-Mounting clamp; 7.1-Block ball; 7.2-Compression spring; 7.3-Clamp body; 7.4-Adjusting shim; 8-Naked eye. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should fall within the scope of the technical content disclosed in the present invention. It should be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0020] This invention provides an embodiment: like Figures 1 to 13As shown, a long-distance conveying mechanism for a small-diameter open-hole detection device in a mine includes a support base 1, an external drive mechanism, a series articulated linkage assembly 3, a detection device mounting platform 5, a conveying depth monitoring mechanism 6, and a mounting clamp 7. The support base 1 is placed outside the open-hole to be detected and serves as the supporting foundation for the conveying mechanism. The series articulated linkage assembly 3 can move relative to the support base 1 along the axial direction of the open-hole to be detected under the action of the external drive mechanism to enter or exit the open-hole. The series articulated linkage assembly 3 includes multiple sets of articulated linkage assemblies. The support base 1 has a guide rail 1.1 that restricts the radial displacement of the linkage assembly. The detection device mounting platform 5 is placed at the front end of the foremost linkage assembly and carries an instrument for detecting open-hole parameters. The conveying depth monitoring mechanism 6 is placed at the axle position of the external drive mechanism and obtains the depth of the series articulated linkage assembly entering the open-hole based on the number of rotations of the axle. The mounting clamp 7 is fixed to the end of the support base 1 near the entrance of the open-hole and is coaxial with the open-hole.

[0021] In this embodiment, the series-connected hinged linkage assembly 3 includes a joint group 3.1 and a linkage assembly connected in series via the joint group 3.1. During detection, the first linkage assembly to enter the hole is the No. I linkage assembly. The front end of the No. I linkage assembly is equipped with a detection device mounting platform 5 for mounting the required detection device. The linkage assembly includes a tubular member 3.2, a driven rack 3.3, a variable diameter guide wheel group 3.4, a slip ring 3.5, and a limiting block. The joint assembly 3.1 is connected to different tubular members 3.2, enabling the end-to-end connection of adjacent tubular members 3.2. The connected tubular members 3.2 can be adjusted within a range of approximately 180°, allowing the two sections of the tubular members 3.2 to fold and unfold. They can be folded for storage and unfolded into a straight state during operation. Simultaneously, it enables long-distance transport and length adjustment of the detection device (the folding and unfolding of the two sections of the tubular members 3.2 via the joint group 3.1 is existing technology, and the specific structure will not be described in detail here). The tubular member 3.2 is a steel pipe, serving as the link assembly. The frame has sufficient strength to withstand significant traction. The driven rack 3.3 is axially fixed to the outer wall of the tubular member 3.2 and meshes with the drive gear 4 of the external drive mechanism. Multiple grooves are spaced around the circumference of the tubular member 3.2. The variable-diameter guide wheel in the variable-diameter guide wheel assembly 3.4 is positioned within these grooves and can extend or retract relative to them. A slip ring 3.5 is slidably positioned on the outer circumference of the tubular member 3.2 and is axially limited by two sets of limiting blocks on two adjacent tubular members 3.2, preventing excessive movement of the slip ring 3.5 and resulting interference. The slip ring 3.5 can press the variable-diameter guide wheel assembly 3.4 back into the groove or release it from the groove. The variable-diameter guide wheel assembly 3.4 is designed to adapt to different bore diameters and uneven bore wall surfaces, and can be stored in a retracted and tightened state when not in use.

[0022] Specifically, the slip ring 3.5 is an annular sleeve structure with a notch at the bottom, and its inner wall includes a cylindrical surface and a conical surface. The inclination angle of the conical surface is 30°. It is used to drive the variable diameter wheel set 3.4 to achieve folding and unfolding by squeezing the inclined surface. The variable diameter wheel set 3.4 includes three evenly distributed rollers 3.8 and a return spring 3.9. The diameter of the rollers 3.8 is 25mm. The two ends of the return spring 3.9 are fixed to the wheel groove and the rollers 3.8, respectively. The central axis of the rollers 3.8 is perpendicular to the central axis of the tubular member 3.2. The elastic force of the return spring 3.9 is set to 30N. The moving path of the slip ring 3.5 can cover the position of the wheel groove. The two sets of limiting blocks (second limiting block 3.7 and first limiting block 3.6) corresponding to one slip ring 3.5 are located in front of the wheel groove on the tubular member 3.2 where the slip ring 3.5 is located and in front of the adjacent tubular member 3.2 behind the slip ring 3.5, respectively.

[0023] The mounting bracket 7 cooperates with the series hinged linkage assembly 3, including a retaining ball 7.1, a compression spring 7.2, and a bracket body 7.3. The retaining ball 7.1 is a steel ball with a diameter of 8mm. The compression spring 7.2 is a cylindrical compression spring with a preload of 50N, ensuring that the retaining ball 7.1 protrudes from the surface of the mounting bracket 7 and can make stable contact with the slip ring 3.5. The clamp body 7.3 is an annular structure with a notch at the bottom, and its inner wall includes a cylindrical surface and a conical surface. Multiple compression springs 7.2 are bolted at intervals along the circumference of the cylindrical surface of the clamp body 7.3. A stop ball 7.1 is fixed to the inner end of each compression spring 7.2. In the initial state of compression, the stop ball 7.1 extends out of the inner wall of the clamp body 7.3 to block the slip ring 3.5. In the initial state of compression, the distance between the stop ball 7.1 and the outer wall of the tubular component 3.2 is greater than the thickness of the limiting block but less than the distance between the outer wall of the slip ring 3.5 and the outer wall of the tubular component 3.2. The distance between the inner wall of the clamp body 7.3 and the outer wall of the tubular component 3.2 is greater than the distance between the outer wall of the slip ring 3.5 and the outer wall of the tubular component 3.2. The installation height is adjusted by adjusting the shims 7.4 so that the center hole of the clamp body 7.3 after installation is coaxial with the center of the naked eye.

[0024] In this embodiment, the support base 1 serves as the supporting foundation for the conveying mechanism, including a guide rail 1.1, a vertical support section, and a retractable pulley block 1.2. The guide rail 1.1 is a semi-circular track with a vertical section and is spaced laterally along the vertical support section. Multiple retractable pulley blocks 1.2 are spaced along the circumferential direction of the inner wall of the guide rail 1.1. The wheel surface of the retractable pulley block 1.2 can abut against the outer wall of the tubular component 3.2 and avoid the limiting block, allowing shafts of a certain diameter range to pass through centrally. At the same time, it provides the structure for other fixing devices, such as screw holes 1.3. In this application, the spring material of the retractable pulley block 1.2 is selected so that it cannot push the slip ring 3.5 and retracts when the pulley contacts the slip ring 3.5. The guide rail 1.1, the external drive mechanism, and the mounting clamp 7 are all connected to the vertical support section.

[0025] An external drive mechanism is installed outside the small-diameter open hole in the mine to provide driving force for conveying power, adapting to the confined space requirements of the small-diameter open hole. It includes a power unit 2 and a drive gear 4 connected to the power unit 2 via belt drive. The power unit 2 transmits power to the drive gear 4 after reduction and torque amplification via a reduction gearbox. The drive gear 4 can rotate in both directions, providing forward or backward power to the series articulated linkage assembly 3. The drive gear 4 is a spur gear with a module of 5 and 20 teeth, meshing with a driven rack 3.3. The tooth pitch of the driven rack 3.3 matches that of the drive gear 4. The external drive mechanism is located below the series articulated linkage assembly 3. The series articulated linkage assembly 3 can be folded for storage and unfolded into a straight state during operation. This enables long-distance transport and length adjustment of the detection device. The detection device mounting platform 5 can be equipped with sensors such as aperture sensors and temperature sensors to collect parameters within the hole. The conveying depth monitoring mechanism 6 includes an encoder and a programmable controller. The encoder is mounted on the shaft of the drive gear 4 to collect the number of rotations in real time and transmit it to the programmable controller. The programmable controller calculates the depth of the series articulated linkage assembly 3 entering the naked eye. At the same time, it can automatically control the start and stop of the power unit 2 according to the preset detection depth value to achieve precise adjustment of the conveying depth.

[0026] The specific working process of the small-aperture naked-eye detection conveying device in this embodiment is as follows: 1. Detection preparation: Store the pre-assembled series articulated link assembly 3 in the link storage compartment, ensuring that the tubular part 3.2 is firmly connected to the driven rack 3.3 and the test device, check the status of each component, ensure that the drive gear 3.4 and the driven rack 3.3 mesh smoothly, and that the pressure spring 7.2 and the return spring 3.9 of the variable diameter wheel set 3.4 are in normal working condition, and that the first limit block 3.6 and the second limit block 3.7 are securely fixed; then connect the series articulated link assembly 3 to the conveying mechanism through the semi-circular guide rail 1.1 of the support base 1.

[0027] 2. Hole entry operation: Start the power unit 2. When the drive gear 4 rotates clockwise, the driven rack 3.3 moves to the right and drives the entire series articulated connecting rod assembly 3 into the open hole. When the retaining ball 7.1 of the mounting bracket 7 contacts the slip ring 3.5 under the action of the compression spring 7.2, the slip ring 3.5 is hindered from moving forward by the retaining ball 7.1. At this time, the variable diameter wheel assembly 3.4 continues to move under the action of the tubular part 3.2, causing axial displacement between the slip ring 3.5 and the variable diameter wheel assembly 3.4. The variable diameter wheel assembly 3.4, which was originally in a retracted state, automatically unfolds under the action of the return spring 3.9, so that the roller 3.8 fits against the hole wall, forming a stable support guide.

[0028] When the slip ring 3.5 moves to the first limiting block 3.6, it is fixed in place. Under the continuous drive of the driven rack 3.3, the stop ball 7.1 continuously compresses the spring 7.2 and retracts into the clamp body 7.3, allowing the slip ring 3.5 to pass smoothly through the mounting clamp 7. The entire mechanism continues to move to the right along the hole wall, driving the testing device mounted on the detection device platform 5 at the front end to move forward, completing the entry and in-hole measurement operations, and recording the hole depth through the conveying depth monitoring mechanism 6.

[0029] 3. Hole Removal Operation: After measurement, the control power unit 2 reverses its operation, causing the drive gear 4 to rotate counterclockwise. When the drive gear 4 rotates counterclockwise, the driven rack 3.3 drives the tubular component 3.2 out of the open hole. After the retaining ball 7.1 of the mounting bracket 7 contacts the slip ring 3.5 under the action of the compression spring 7.2, the slip ring 3.5 stops immediately. The variable diameter wheel set 3.4 moves along the inclined surface of the slip ring 3.5. The variable diameter wheel set 3.4, which was originally in the unfolded state, retracts under the pressure of the inclined surface, so that the roller 3.8 is placed inside the slip ring 3.5.

[0030] After the slip ring 3.5 contacts and is positioned with the second limit block 3.7, under the continuous drive of the driven rack 3.3, the mechanism overcomes the preload of the compression spring 7.2 and compresses it. The stop ball 7.1 is squeezed in by the slip ring 3.5. The slip ring 3.5 passes smoothly through the mounting bracket and further compresses the variable diameter wheel set 3.4 to the retracted state through the inclined plane. Then the entire mechanism smoothly exits from the hole.

[0031] 4. After being withdrawn, the tandem articulated link assembly 3 can be automatically or manually retrieved into the link storage compartment to complete this detection test.

[0032] Recovery and Reset: After the mechanism has completely withdrawn from the hole, the tubular part 3.2 and all components are collected into the connecting rod storage compartment through the automatic recovery mechanism of the device or manual operation. The data collected by the test device is cleared, the wear of each component is checked, and the detection operation is completed, preparing for the next detection.

[0033] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A long-distance conveying mechanism for a small-diameter naked-eye detection device in mines, characterized in that: It includes a support base (1), an external drive mechanism, a series articulated linkage assembly (3), a detection device mounting platform (5), a conveying depth monitoring mechanism (6), and a mounting clamp (7); The support base (1) is placed outside the naked eye to be tested and serves as the support base for the conveying mechanism. The series articulated linkage assembly (3) can move relative to the support base (1) along the axis of the naked eye to be tested under the action of the external drive mechanism to enter or exit the naked eye. The series articulated linkage assembly (3) includes multiple sets of articulated linkage assemblies. The support base (1) has a guide rail (1.1) that limits the radial displacement of the linkage assembly. The detection device mounting platform (5) is placed at the front end of the foremost linkage assembly and is equipped with an instrument for detecting naked eye parameters. The conveying depth monitoring mechanism (6) is placed at the wheel axle position of the external drive mechanism and obtains the depth of the series articulated linkage assembly entering the naked eye based on the number of rotations of the wheel axle. The mounting clamp (7) is fixed to the end of the support base (1) near the naked eye entrance and is coaxial with the naked eye.

2. The long-distance conveying mechanism for a small-diameter naked-eye detection device in a mine according to claim 1, characterized in that: The series-connected articulated linkage assembly (3) includes a joint assembly (3.1) and a linkage assembly articulated in series through the joint assembly (3.1). The linkage assembly includes a tubular member (3.2), a driven rack (3.3), a variable-diameter guide wheel assembly (3.4), a slip ring (3.5), and a limiting block. The driven rack (3.3) is fixedly connected to the outer wall of the tubular member (3.2) along the axial direction and meshes with the drive gear (4) of the external drive mechanism for transmission. The variable diameter guide wheel assembly (3.4) is provided with multiple grooves at intervals around its circumference. The variable diameter guide wheel in the variable diameter guide wheel assembly (3.4) is set in the groove and can extend or retract relative to the groove. The slip ring (3.5) is slidably set on the outer circumference of the tubular component (3.2) and the slip ring (3.5) is limited to two positions in the axial direction by two sets of limiting blocks set on two adjacent tubular components (3.2). The slip ring (3.5) can press the variable diameter guide wheel assembly (3.4) back into the groove or release it from the groove.

3. The long-distance conveying mechanism for a small-diameter naked-eye detection device in a mine according to claim 2, characterized in that: The mounting bracket (7) includes a retaining ball (7.1), a compression spring (7.2), and a bracket body (7.3). The bracket body (7.3) is an annular structure with a notch at the bottom, and its inner wall includes a cylindrical surface and a conical surface. Multiple compression springs (7.2) are bolted at intervals along the circumferential direction of the cylindrical surface of the bracket body (7.3). The retaining ball (7.1) is fixed to the inner end of the compression spring (7.2), and the retaining ball (7.1) extends in the initial state of the compression spring (7.2). The inner wall of the clamp body (7.3) is exposed to block the slip ring (3.5); in the initial state of the compression spring (7.2), the distance between the stop ball (7.1) and the outer wall of the tubular member (3.2) is greater than the thickness of the limiting block and less than the distance between the outer wall of the slip ring (3.5) and the outer wall of the tubular member (3.2). The distance between the inner wall of the clamp body (7.3) and the outer wall of the tubular member (3.2) is greater than the distance between the outer wall of the slip ring (3.5) and the outer wall of the tubular member (3.2).

4. The long-distance conveying mechanism for a small-diameter naked-eye detection device in a mine according to claim 3, characterized in that: The slip ring (3.5) is an annular sleeve structure with a notch at the bottom and its inner wall includes a cylindrical surface and a conical surface. The variable diameter guide wheel includes a roller (3.8) and a return spring (3.9). The two ends of the return spring (3.9) are fixed to the wheel groove and the roller (3.8) respectively. The central axis of the roller (3.8) is perpendicular to the central axis of the tubular member (3.2). The movement path of the slip ring (3.5) can cover the position of the wheel groove. The two sets of limiting blocks corresponding to one slip ring (3.5) are located in front of the wheel groove on the tubular member (3.2) where the slip ring (3.5) is located and in front of the adjacent tubular member (3.2) behind the slip ring (3.5).

5. The long-distance conveying mechanism for a small-diameter naked-eye detection device in a mine according to claim 4, characterized in that: The support base (1) includes a guide rail (1.1), a vertical support section and a retractable pulley block (1.2). The guide rail (1.1) is a semi-circular rail with a vertical section and is spaced laterally along the vertical support section. Multiple retractable pulley blocks (1.2) are spaced along the circumferential direction of the inner wall of the guide rail (1.1). The wheel surface of the retractable pulley block (1.2) can abut against the outer wall of the tubular component (3.2) and avoid the limiting block. The guide rail (1.1), the external drive mechanism and the mounting clamp (7) are all connected to the vertical support section.

6. The long-distance conveying mechanism for a small-diameter naked-eye detection device in a mine according to claim 5, characterized in that: The external drive mechanism includes a power unit (2) and a drive gear (4) connected to the power unit (2) by belt drive. The external drive mechanism is located below the series articulated linkage assembly (3). The conveying depth monitoring mechanism (6) includes an encoder and a programmable controller. The encoder is installed on the shaft of the drive gear (4) to collect the number of rotations in real time and transmit it to the programmable controller. The programmable controller calculates the depth of the series articulated linkage assembly (3) into the naked eye and can automatically control the start and stop of the power unit (2) according to the preset detection depth value.

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