Drill core sampling device for engineering detection

Abstract

The invention relates to the technical field of engineering detection sampling, and discloses a core drilling sampling device for engineering detection, which comprises a sampling mechanism and a rotary driving mechanism. The sampling mechanism comprises a drill cylinder, a drill bit, a bearing and a sampling pipe which are coaxially distributed. The sampling pipe, the bearing and the drill bit are sleeved with the drill cylinder, and a cutting edge extending in the circumferential direction is arranged at the bottom end of the drill cylinder. The drill bit is provided with at least one axial sampling through hole for communicating the outside with the inside of the sampling tube and is in sliding connection with the drill cylinder. The outer ring of the bearing is linked with the drill bit, and the inner ring abuts against the sampling pipe. The rotation driving mechanism is in transmission connection with the drill cylinder and drives the drill cylinder to rotate for cutting. According to the invention, the problem that the drilling pipe cannot perform normal sampling due to the fact that a drilled sample is easy to fall off and backfill in the lifting process of the sampling pipe is solved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering detection sampling, and in particular to a core drilling sampling device used for engineering detection. Background Art

[0002] The core sampling device in engineering inspection is a special device used to drill cylindrical samples from materials such as concrete, asphalt, and rock. It is mainly used to evaluate the quality indicators of materials such as strength, density, and defects. Traditional sampling devices usually consist of a rotating drill bit and a spiral sampling tube. Geological samples are collected through the cutting action of the drill bit and the conveying action of the spiral tube.

[0003] However, the existing device has obvious shortcomings in practical applications: when the drill bit and the spiral tube rotate synchronously during drilling, due to insufficient friction resistance between the soil or rock layer and the tube wall, coupled with the influence of drill bit vibration and centrifugal force, the collected samples are prone to loosening, breaking or stratification when taken out of the spiral tube, especially in areas with soft soil. The drilled samples are prone to fall off and backfill during the lifting process of the sampling tube, resulting in the inability to sample normally through the drilling tube. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a core sampling device for engineering inspection, which can perform core sampling in soft areas and prevent the sample in the sampling tube from falling off and backfilling during the lifting process.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] A core sampling device for engineering inspection, comprising:

[0007] A sampling mechanism, the sampling mechanism comprises a drill barrel, a drill bit, a bearing and a sampling tube, the drill barrel is sleeved outside the sampling tube, the bearing and the drill bit, the drill barrel, the drill bit, the bearing and the sampling tube are coaxially distributed, the drill bit, the bearing and the sampling tube are arranged in sequence along the height direction; the drill barrel comprises a barrel body and a cutting edge, the cutting edge is arranged at the edge of the bottom end of the barrel body and extends along the circumference of the barrel body; the drill bit is provided with at least one sampling through hole extending along the axial direction of the drill bit, and the two ends of the sampling through hole are respectively connected to the external environment and the interior of the sampling tube; the drill bit is slidably connected to the drill barrel; the outer ring of the bearing is linked to the drill bit, and the inner ring of the bearing abuts against the sampling tube;

[0008] A rotary drive mechanism is drivingly connected to the drill tube.

[0009] Furthermore, the drill bit is provided with a first sliding block, the inner wall of the drill barrel is provided with a sliding groove along the axial direction, and the first sliding block cooperates with the sliding groove to enable the drill bit to move in the axial direction of the drill barrel.

[0010] Furthermore, the outer wall of the cylinder is provided with a plurality of height locking pieces along the axial direction, and the drill bit cooperates with at least one of the height locking pieces.

[0011] Furthermore, there is an accommodating space between the barrel and the sampling tube, and the drill bit is provided with at least one coolant flow channel, and the coolant flow channel is respectively connected to the external environment and the accommodating space.

[0012] Furthermore, the rotary drive mechanism comprises a first motor and a first transmission rod drivingly connected to the first motor, and a linkage ring is detachably sleeved on the top end of the drill tube, and the linkage ring is circumferentially linked to the first transmission rod.

[0013] Furthermore, the first transmission rod is extended and arranged in the sampling tube, and one end of the first transmission rod close to the drill bit is connected to a compression disk, and the compression disk is used to compress the sample after entering the sampling tube.

[0014] Furthermore, the core drilling sampling device for engineering inspection also includes a support frame and a second driving mechanism, wherein the second driving mechanism is installed on the support frame, connected to the sampling mechanism, and used to drive the sampling mechanism to move along the axial direction of the sampling mechanism.

[0015] Furthermore, the second driving mechanism includes a second motor, a second transmission rod, a transmission assembly, a screw and a lifting slider. The second motor, the second transmission rod, the transmission assembly and the screw are sequentially connected in transmission. The lifting slider is threadedly connected to the screw, and the sampling mechanism is installed on the lifting slider.

[0016] Furthermore, the transmission assembly is a pulley assembly.

[0017] Furthermore, it is characterized in that the support frame is provided with a vertical guide rod, and the lifting slider is slidably connected to the vertical guide rod.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Based on the design of connecting the at least one sampling through hole 2 axially opened on the drill bit 102 and the sampling tube 104, the sample can enter the sampling tube 104 from the sampling through hole 2 through the centrifugal force and negative pressure effect during the cutting process, thereby preventing the drilled sample from falling off and backfilling the drill hole during the lifting process, thereby allowing the drilling tube to sample normally.

[0020] 2. Based on the design where the outer ring of the bearing 103 is linked with the drill bit 102 and the inner ring abuts against the sampling tube 104, the rotation speed of the sampling tube 104 is slow relative to the drill barrel 101, avoiding the phenomena of extrusion, fragmentation or stratification of the sample due to the high-speed rotation of the sampling tube 104, and providing a more real and reliable sample basis for subsequent material property analysis. Brief Description of the Drawings

[0021] Figure 1 Schematic structural diagram of the sampling mechanism and the rotating mechanism of a core sampling device for engineering detection according to the present invention;

[0022] Figure 2 Schematic overall structural diagram of a core sampling device for engineering detection according to the present invention;

[0023] Figure 3 Transverse sectional view of the sampling mechanism of a core sampling device for engineering detection according to the present invention.

[0024] In the figure: 1. Sampling mechanism; 101. Drill barrel; 111. Cylinder body; 112. Cutting edge; 102. Drill bit; 103. Bearing; 104. Sampling tube; 2. Sampling through hole; 3. First slider; 4. Slide groove; 5. Vertical guide rod; 6. Height locking member; 7. Accommodation space; 8. Coolant flow channel; 9. Rotation driving mechanism; 901. First motor; 902. First transmission rod; 10. Linking ring; 11. Compression disk; 12. Support frame; 13. Second driving mechanism; 131. Second motor; 132. Second transmission rod; 133. Transmission assembly; 134. Lead screw; 135. Lifting slider. Detailed Embodiment

[0025] Next, in combination with the drawings and specific embodiments, the present invention will be further described. It should be noted that, on the premise of no conflict, the following described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0026] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element. The "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0027] Unless otherwise defined, all technical terms and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] See also Figures 1 - 3 A core sampling device for engineering inspection according to a preferred embodiment of the present invention comprises a sampling mechanism 1 and a rotating drive mechanism 9, wherein the sampling mechanism 1 comprises a drill barrel 101, a drill bit 102, a bearing 103 and a sampling tube 104, wherein the drill barrel 101 is sleeved outside the sampling tube 104, the bearing 103 and the drill bit 102, wherein the drill barrel 101, the drill bit 102, the bearing 103 and the sampling tube 104 are coaxially distributed, wherein the drill bit 102, the bearing 103 and the sampling tube 104 are arranged in sequence along the height direction; wherein the drill barrel 101 comprises a barrel body 111 and a cutting A cutting edge 112 is provided at the edge of the bottom end of the barrel 111 and is extended along the circumference of the barrel 111; the drill bit 102 is provided with at least one sampling through hole 2 extending along the axial direction of the drill bit 102, and the two ends of the sampling through hole 2 are respectively connected to the external environment and the interior of the sampling tube 104; the drill bit 102 is slidably connected to the drill barrel 101; the outer ring of the bearing 103 is linked to the drill bit 102, and the inner ring of the bearing 103 is in contact with the sampling tube 104; the rotary drive mechanism 9 is transmission-connected to the drill barrel 101.

[0029] During operation, the rotary drive mechanism 9 drives the drill tube 101 to rotate around its axis through a transmission connection, and the circumferentially extending cutting edge 112 arranged at the bottom edge of the barrel 111 rotates accordingly and cuts the target to be measured; the drill bit 102 rotates synchronously driven by the drill tube 101, specifically, the drill bit 102 is connected to the drill bit 102 through the outer ring of the bearing 103 to realize power transmission, and the inner ring of the bearing 103 is fixed to the sampling tube 104 to support the sampling tube 104, thereby forming the drill bit 102 to rotate relative to the sampling tube 104; the drill bit 102 rotates synchronously with the drill tube 101. At least one sampling through hole 2 axially opened in 02 connects the external environment with the interior of the sampling tube 104, so that the sample generated by cutting enters the interior of the sampling tube 104 through the sampling through hole 2 under the action of centrifugal force and negative pressure. The slidable connection between the drill bit 102 and the drill barrel 101 allows the two to produce relative displacement in the axial direction, so that the sampling tube 104 can be taken out of the drill barrel 101 after the drilling of the sample is completed, and finally the coaxially distributed drill barrel 101, drill bit 102, bearing 103 and sampling tube 104 cooperate to complete the rotation cutting and sample collection operations.

[0030] Based on the design of the connection between the sampling through-hole 2 axially opened in the drill bit 102 and the sampling pipe 104, it is possible to make the sample enter the sampling pipe 104 from the sampling through-hole 2 during the cutting process through centrifugal force and negative pressure effect, avoiding the sample falling off and backfilling the drill hole during the lifting process, so that the drill pipe can sample normally.

[0031] Based on the design that the outer ring of the bearing 103 is linked with the drill bit 102 and the inner ring abuts against the sampling pipe 104, the rotation speed of the sampling pipe 104 is slower than that of the drill barrel 101, avoiding the phenomena of extrusion, fragmentation or stratification of the sample due to the high-speed rotation of the sampling pipe 104, and providing a more real and reliable sample basis for subsequent material property analysis.

[0032] In the present invention, the rotary drive mechanism 9 provides a controllable power output for the drill barrel 101 to ensure the stable operation of the equipment. The drill bit 102 and the drill barrel 101 are of a sliding structure, that is, they can be separated from each other. The device can flexibly switch the working mode according to the actual working conditions: when the drill bit 102 and the drill barrel 101 are used in combination, conventional core sampling operations can be carried out; after separation, the drill barrel 101 can be used alone as a hollow drill, significantly expanding the application scenarios of the device. Specifically, in occasions such as concrete strength detection where only a drill hole is required without retaining a complete core sample, using the drill barrel 101 alone can quickly complete the drilling operation and improve work efficiency; while in working conditions such as geotechnical exploration where a complete formation sample needs to be retained, the combined mode can be adopted for sampling. This modular design not only ensures the dedicated sampling function but also takes into account the general drilling requirements, enabling a single device to meet various engineering detection requirements, greatly improving the utilization rate and economy of the device. The independent use of the drill barrel 101 after separation not only simplifies the operation process but also reduces the equipment configuration cost.

[0033] The drill barrel 101 is composed of a barrel body 111 and a replaceable cutting edge 112. Its modular design enables the device to adapt to various working conditions. The design of the replaceable cutting edge 112 not only extends the service life of the drill barrel 101 but also allows different materials of cutting edges to be selected according to the material hardness. For example, diamond-coated cutting edges are used for high-strength concrete, and cemented carbide cutting edges are used for ordinary geotechnical materials, significantly improving the drilling efficiency. The cutting edge angle of the cutting edge 112 can be optimized according to different material characteristics: a larger rake angle is used for brittle materials to improve the cutting efficiency, and a smaller rake angle is selected for ductile materials to enhance the cutting edge strength. In addition, the chip fluting design of the cutting edge 112 has been optimized by fluid mechanics to ensure smooth chip removal under different formation conditions and avoid the reduction of drilling efficiency caused by chip accumulation. To further improve the adaptability of the drill barrel 101 and protect the cutting edge 112, further, the drill barrel 101 is integrated with a temperature sensor to monitor the temperature change during the drilling process in real time. When the temperature exceeds the threshold, an automatic alarm can be issued to prevent the failure of the cutting edge 112 due to overheating.

[0034] During the process of core drilling, the hardness of the geology continuously changes with depth. To better adapt to the drilling geological environment, a pressure sensor is also added to the drill barrel 101. This pressure sensor can accurately capture the pressure fluctuations when the drill bit 102 penetrates different geological layers. Through real-time feedback, the rotational torque and feed speed of the drill barrel 101 can be adjusted to prevent the drill bit 102 from getting stuck or the sample from being broken.

[0035] In the present invention, the drill bit 102 is slidably connected to the drill barrel 101. Preferably, a first slider 3 is provided on the drill bit 102, and a chute 4 is provided along the axial direction on the inner wall of the drill barrel 101. The first slider 3 cooperates with the chute 4 to enable the drill bit 102 to move in the axial direction of the drill barrel 101. The cooperation between the first slider 3 and the chute 4 can effectively limit the radial offset of the drill bit 102, ensuring the coaxiality of the sampling process. At the same time, when suddenly touching a hard target, it has a certain buffering effect, prolonging the service life of the drill bit 102. Based on the sliding structure of the drill bit 102 and the drill barrel 101, the two are detachable. The drill bit 102 in the present invention can be replaced according to different usage environments, thus meeting the diversified core drilling sampling requirements. For example, when operating in soft soil layers, a three-wing scraper drill bit 102 with a wide chip removal groove can be selected to improve the drilling efficiency and prevent blockage; when encountering hard rock formations, it can be quickly replaced with a polycrystalline diamond compact (PDC) drill bit 102 to ensure drilling accuracy and durability; and in geological exploration that requires precise sampling, a thin-walled annular drill bit 102 can be used to reduce sample disturbance and maintain the original structure. This modular design not only improves the adaptability and working efficiency of the equipment, but also reduces the usage cost. The operator does not need to replace the entire set of drilling tools, and only needs to select a matching drill bit 102 according to the working conditions. In addition, the cooperation structure between the chute 4 and the slider is convenient for quick disassembly and assembly, reducing the downtime for maintenance and further enhancing the continuity and economy of engineering operations.

[0036] In addition, in the present invention, a plurality of height locking members 6 are provided along the axial direction on the outer wall of the cylinder body 111, and the drill bit 102 cooperates with at least one of the height locking members 6. The height locking members 6 enable the drill bit 102 to be fixed in cooperation with the locking members at different positions according to the operation depth requirements, realizing precise depth control and sectional drilling. This structural design can not only effectively avoid the problems of over-drilling or under-drilling, ensuring the accuracy of geological sampling and depth-controlled drilling, but also share the axial load of the drill bit 102, reduce the wear of sliding parts, and prolong the service life of the equipment. This locking mechanism can adopt quick disassembly and assembly methods such as spring pins, snap rings or threaded fasteners. On the premise of ensuring the connection reliability, the depth adjustment is more convenient and flexible, greatly improving the adaptability and working efficiency of the drilling operation, especially suitable for geological exploration and engineering construction scenarios that require stratified sampling or precise control of the drilling depth.

[0037] In the present invention, in order to prevent the drill bit 102 from being scrapped due to overheating after working for a long time, preferably, there is a accommodating space 7 between the barrel 111 and the sampling tube 104, and the drill bit 102 is provided with at least one coolant flow channel 8, and the coolant flow channel 8 is respectively connected to the external environment and the accommodating space 7. During operation, the user can add coolant to the accommodating space 7 according to needs, and the coolant flows down along the surface of the drill barrel 101 and the drill bit 102 through the coolant flow channel 8, and takes away the high temperature generated by the drill bit 102 and the cutting edge 112 during operation in time, effectively preventing the material degradation and cutting performance reduction of the drill bit 102 or the cutting edge 112 caused by excessive temperature. At the same time, the coolant can also play a lubricating role during the flow process, reducing the friction resistance between the drill bit 102 and the drilling target, which is more conducive to drilling samples. Among them, the coolant flow channel 8 can be filled with a corresponding blocking mechanism, and the accommodating space 7 can serve as a temporary storage area. In extreme environments, such as Arctic frozen soil or high-temperature rock formations, the accommodating space 7 allows the injection of functional liquids with different characteristics (such as antifreeze, rust inhibitor, etc.). By quickly changing the type of liquid, the same device can be used for metal mine exploration in addition to core sampling.

[0038] After drilling the sample, in order to more conveniently take out the sample, preferably, the rotary drive mechanism 9 includes a first motor 901 and a first transmission rod 902 connected to the first motor 901, and the top of the drill tube 101 is detachably sleeved with a linkage ring 10, and the linkage ring 10 is circumferentially linked to the first transmission rod 902. The circumferential linkage design of the linkage ring 10 and the first transmission rod 902 realizes the rapid disassembly and assembly of the drill tube 101 while maintaining the stability of power transmission. After sampling, the drill tube 101 can be removed as a whole by simply releasing the connection of the linkage ring 10. In the present invention, the linkage ring 10 and the drill tube 101 are fixed by a latch, which not only ensures the reliability of power transmission during drilling, but also enables the operator to complete the loading and unloading of the drill tube 101 in a short time. Its fixing structure is not limited to the latch device, wherein threaded connection and riveting can achieve the fixing effect of the linkage ring 10 and the drill tube 101. The modular design facilitates the cleaning and maintenance of the inner wall of the drill tube 101 and the sampling tube 104, and is particularly suitable for continuous sampling operation scenarios. In the present invention, a plurality of slots capable of matching different sizes can be designed on the linkage ring 10, and the same rotary drive mechanism 9 can be adapted to drill tubes 101 of different diameters, thereby enhancing the scalability of the equipment.

[0039] In order to make the sample take on a cylindrical shape after being poured out, which is more convenient for detection, preferably, the first transmission rod 902 extends into the sampling tube 104. One end of the first transmission rod 902 close to the drill bit 102 is connected with a compression disc 11, and the compression disc 11 is used for compressing the sample that enters the sampling tube 104. When a certain amount of sample enters the sampling tube 104 and reaches the height where the compression disc 11 is located, when the compression disc 11 rotates synchronously with the drill bit 102, an axial pressure will be exerted on the loose sample entering the sampling tube 104, so that a dense and uniform columnar structure is formed in the sampling tube 104, avoiding the common layering or fragmentation phenomena in traditional sampling. This structure is compatible with various soil types. Whether it is cohesive soil, gravel layer or soft rock layer, standardized cylindrical samples can be obtained, which can improve the accuracy of geological data. More preferably, in the present invention, the transmission rod and the compression disc 11 can be directly connected with a telescopic rod. When the telescopic rod is subjected to a certain pressure, it compresses in the direction away from the drilling direction, so as to avoid the destruction of the original structure of the rock layer caused by excessive compaction while ensuring uniform compression of the sample.

[0040] In order to ensure that the sampling mechanism 1 can strictly maintain a straight drilling trajectory along the preset inclination angle and automatically apply a constant axial feed pressure during the core sampling process, preferably, the core sampling device for engineering detection further includes a support frame 12 and a second driving mechanism 13. The second driving mechanism 13 is installed on the support frame 12, and the second driving mechanism 13 is connected to the sampling mechanism 1 and is used to drive the sampling mechanism 1 to move along the axis direction of the sampling mechanism 1. The second driving mechanism 13 provides a stable axial pushing force through a servo motor or a hydraulic system, and can automatically adjust the downward pressure according to the hardness of different rock layers, ensuring that the drill bit 102 always contacts the rock layer with the best pressure, avoiding both the low drilling efficiency caused by insufficient pressure and the wear of the drill bit 102 and the fragmentation of the core caused by excessive pressure. The rigid connection of this mechanism with the support frame 12 constitutes a stable guiding system, which can effectively suppress the lateral vibration and deviation during the drilling process, ensuring that the sampling mechanism 1 advances strictly along the preset axis direction. This design enables the operator to avoid manually applying pressure, improving both the operation safety and obtaining more standardized core samples, providing reliable basic data for subsequent laboratory analysis.

[0041] In the present invention, the second driving mechanism 13 includes a second motor 131, a second transmission rod 132, a transmission assembly 133, a lead screw 134, and a lifting slider 135. The second motor 131, the second transmission rod 132, the transmission assembly 133, and the lead screw 134 are sequentially connected for transmission. The lifting slider 135 is threadedly connected to the lead screw. The sampling mechanism 1 is mounted on the lifting slider 135. This structure can efficiently convert the rotational motion of the motor into the linear motion of the lifting slider 135, driving the sampling mechanism 1 to achieve displacement along the axis. In the present invention, the cooperation between the lifting slider 135 and the guiding track eliminates the radial clearance, enabling the sampling mechanism 1 to always maintain a linear motion trajectory. The transmission assembly 133 can be a gear, and the speed ratio can be adjusted as needed, which can not only achieve rapid no-load movement but also provide a drilling effect with low speed and high torque.

[0042] More preferably, the transmission assembly 133 is a pulley assembly. In the present invention, the rubber or polyurethane material of the pulley assembly can effectively absorb shock and vibration, making the drilling process more stable, especially suitable for environmentally sensitive scenarios such as urban engineering detection. When the drill bit 102 encounters a hard interlayer, the characteristic of belt slipping can automatically cut off the power transmission, avoiding motor jamming or the transmission rod being twisted off. The pulley assembly can achieve speed ratio transformation by simply adjusting the diameter of the pulley.

[0043] In the present invention, in order to further ensure that the core sampling operation direction is always on the same straight line, preferably, the support frame 12 is provided with a vertical guide rod 5, and the lifting slider 135 is slidably connected to the vertical guide rod 5. Among them, the vertical guide rod 5 can effectively offset the torque generated during drilling, preventing the sampling mechanism 1 from deflecting. The vertical guide rods 5 are symmetrically distributed to prevent the vertical guide rods 5 from being deformed due to concentrated stress, ensuring that the slider always feeds along the preset direction.

[0044] A core sampling device for engineering detection according to the present invention has the following technical effects but is not limited to:

[0045] 1. Based on the sliding connection and adaptive adjustment design between the drill bit 102 and the drill barrel 101, the device can dynamically adjust the contact sequence according to the geological hardness. When encountering a hard rock formation, the drill bit 102 contacts the target first to reduce the wear of the cutting edge 112. When encountering a soft layer, the drill barrel 101 cuts in first to avoid sample distortion, significantly improving the sampling stability and sample integrity in complex environments.

[0046] 2. Through the transmission structure in which the outer ring of the bearing 103 drives the drill bit 102 and the inner ring abuts against the sampling tube 104, the rotation speed of the sample in the sampling tube 104 is relatively slow, effectively avoiding problems such as extrusion, fragmentation, or stratification caused by the high-speed rotation of the sampling tube 104, providing a true and reliable sample basis for material property analysis.

[0047] 3. The modular design endows the device with multifunctional application scenarios. When the drill barrel 101 and the drill bit 102 are combined, conventional core drilling and sampling can be completed. After separation, the drill barrel 101 can be used alone as a hollow drill, meeting diverse requirements such as concrete drilling and geotechnical sampling, reducing equipment configuration costs while improving utilization rate and economy.

[0048] 4. The second driving mechanism 13 provides a stable axial pushing force through a servo motor or a hydraulic system. Combined with the rigid guiding of the vertical guide rod 5, it can ensure that the sampling mechanism 1 drills straight along a preset inclination angle, automatically adjust the downward pressure to avoid wear of the drill bit 102 or breakage of the core, and simultaneously suppress lateral vibration, significantly improving the sampling standardization degree and operation safety.

[0049] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0050] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0051] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various changes or substitutions, and these should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A core sampling device for engineering inspection, characterized in that, include: A sampling mechanism (1), the sampling mechanism (1) comprising a drill tube (101), a drill bit (102), a bearing (103) and a sampling tube (104); the drill tube (101) is sleeved outside the sampling tube (104), the bearing (103) and the drill bit (102); the drill tube (101), the drill bit (102), the bearing (103) and the sampling tube (104) are coaxially distributed; the drill bit (102), the bearing (103) and the sampling tube (104) are arranged in sequence along a height direction; the drill tube (101) comprises a barrel (111) and a cutting edge (112); 12), the cutting edge (112) is arranged at the edge of the bottom end of the cylinder (111) and is extended along the circumference of the cylinder (111); the drill bit (102) is provided with at least one sampling through hole (2) extending along the axial direction of the drill bit (102), and the two ends of the sampling through hole (2) are respectively connected to the external environment and the interior of the sampling tube (104); the drill bit (102) is slidably connected to the drill cylinder (101); the outer ring of the bearing (103) is linked to the drill bit (102), and the inner ring of the bearing (103) is in contact with the sampling tube (104); A rotary drive mechanism (9), the rotary drive mechanism (9) is drivingly connected to the drill tube (101).

2. The core sampling device for engineering inspection according to claim 1, wherein, The drill bit (102) is provided with a first sliding block (3), and the inner wall of the drill tube (101) is provided with a sliding groove (4) along the axial direction. The first sliding block (3) cooperates with the sliding groove (4) so that the drill bit (102) can move in the axial direction of the drill tube (101).

3. A core sampling device for engineering inspection according to claim 1, characterized in that, The outer wall of the cylinder (111) is provided with a plurality of height locking pieces (6) along the axial direction, and the drill bit (102) cooperates with at least one of the height locking pieces (6).

4. A core sampling device for engineering inspection according to claim 1, characterized in that, An accommodating space (7) is provided between the barrel (111) and the sampling tube (104), and the drill bit (102) is provided with at least one coolant flow channel (8), and the coolant flow channel (8) is respectively connected to the external environment and the accommodating space (7).

5. A core sampling device for engineering inspection according to claim 1, characterized in that, The rotary drive mechanism (9) comprises a first motor (901) and a first transmission rod (902) transmission-connected to the first motor (901); a linkage ring (10) is detachably sleeved on the top end of the drill tube (101); and the linkage ring (10) is circumferentially linkage-connected to the first transmission rod (902).

6. The core sampling device for engineering inspection according to claim 5, characterized in that, The first transmission rod (902) is extended and arranged in the sampling tube (104); one end of the first transmission rod (902) close to the drill bit (102) is connected to a compression disk (11); the compression disk (11) is used to compress the sample after entering the sampling tube (104).

7. The core sampling device for engineering inspection according to claim 6, wherein, The core drilling sampling device for engineering inspection further comprises a support frame (12) and a second driving mechanism (13), wherein the second driving mechanism (13) is mounted on the support frame (12), and the second driving mechanism (13) is connected to the sampling mechanism (1) and is used to drive the sampling mechanism (1) to move along the axial direction of the sampling mechanism (1).

8. A core sampling device for engineering inspection according to claim 7, characterized in that, The second driving mechanism (13) comprises a second motor (131), a second transmission rod (132), a transmission assembly (133), a screw rod (134) and a lifting slider (135); the second motor (131), the second transmission rod (132), the transmission assembly (133) and the screw rod (134) are sequentially connected in a transmission manner; the lifting slider (135) is threadedly connected to the screw rod (134); and the sampling mechanism (1) is mounted on the lifting slider (135).

9. The core sampling device for engineering detection according to claim 8, characterized in that, The transmission assembly (133) is a pulley assembly.

10. A core sampling device for engineering inspection according to claim 8, characterized in that, The support frame (12) is provided with a vertical guide rod (5), and the lifting slider (135) is slidably connected to the vertical guide rod (5).

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