Geotechnical engineering investigation drilling rig

Abstract

The invention provides a geotechnical engineering investigation drilling rig which comprises an inner cylinder and an outer cylinder, the inner cylinder and the outer cylinder are arranged along a first axis, the outer peripheral wall surface of the inner cylinder is tightly attached to the inner peripheral wall surface of the outer cylinder, the inner cylinder comprises a plurality of sub-cylinder bodies, every two sub-cylinder bodies are connected end to end along the first axis, the adjacent sub-cylinder bodies are detachably connected, and the outer peripheral wall surface of the inner cylinder is tightly attached to the outer peripheral wall surface of the outer cylinder. The sub-cylinders are used for taking out samples in sections, and the first axis is the central axis of the outer cylinder. Therefore, the inner cylinder is segmented into the plurality of sub-cylinders, so that samples can be taken out in a segmented manner in a sample taking-out stage, and the problems that rock core samples rapidly fall off and cannot be correctly sorted when the rock core samples are taken out by a traditional geotechnical engineering exploration drilling device can be avoided; the soft rock core and the complete hard rock core can be more conveniently segmented and loaded into a sample box through segmented sampling.

Description

Technical Field

[0001] The invention relates to the field of geological exploration, and in particular to a geotechnical engineering exploration drilling device. Background Art

[0002] In geological exploration, obtaining underground core samples through drilling is an important means to understand information such as stratum structure, rock characteristics, and mineral resource distribution. During the drilling process, the core is stored in an inner tube and needs to be taken out of the inner tube for detailed analysis and research.

[0003] When encountering broken and segmented hard rock cores, the existing geotechnical engineering survey and drilling equipment removes them by hammering the outer wall of the inner tube. However, hammering the outer wall of the inner tube may cause the rock core to fall off quickly. Since the rock core is broken and falls off quickly, it is difficult to sort it effectively, affecting the judgment of the geological structure and sedimentary environment. For soft rock cores, their own structure is relatively loose, and hammering the outer wall of the inner tube is difficult to provide sufficient force to make it fall off smoothly. The friction between the intact hard rock core and the inner tube is relatively large, and it is also not easy to fall off. When facing rock cores of different textures, the existing core removal method cannot take into account the needs of efficient removal, orderly arrangement, and convenient segmentation. Summary of the invention

[0004] Based on this, it is necessary to provide a geotechnical engineering survey drilling device to address the problem that core samples in current geotechnical engineering survey drilling devices fall off quickly, making it difficult to effectively sort the core samples.

[0005] The above purpose is achieved through the following technical solutions: A geotechnical engineering survey drilling device comprises an inner cylinder and an outer cylinder, wherein the inner cylinder and the outer cylinder are arranged along a first axis, the outer peripheral wall surface of the inner cylinder is in close contact with the inner peripheral wall surface of the outer cylinder, the inner cylinder comprises a plurality of sub-cylinder bodies, the plurality of sub-cylinder bodies are connected end to end in pairs along the first axis, adjacent sub-cylinder bodies are detachably connected, the plurality of sub-cylinder bodies are used for taking out samples in sections, and the first axis is the central axis of the outer cylinder.

[0006] The geotechnical engineering investigation and drilling device forms a sampling stage, an inner cylinder removal stage and a sample removal stage during use. When in the sampling stage, the geotechnical engineering investigation and drilling device enters geotechnical sampling; when in the inner cylinder removal stage, the inner cylinder is removed from the outer cylinder; when in the sample removal stage, the core sample is removed from the inner cylinder.

[0007] In one of the embodiments, a sleeve is provided inside any of the sub-cylinder bodies, and the outer circumferential wall surface of the sleeve is in close contact with the inner circumferential wall surface of the sub-cylinder body. When in the sampling stage and the inner cylinder removal stage, the sleeve and the sub-cylinder body are relatively stationary; when in the sample removal stage, the sleeve and the sub-cylinder body can rotate relative to each other, and the sleeve is used to accommodate the sample.

[0008] In one embodiment, the inner cylinder includes at least a first sub-cylinder and a second sub-cylinder that are adjacent to each other, and a spring ring is arranged between the first sub-cylinder and the second sub-cylinder, one end of the spring ring is detachably connected to one end of the first sub-cylinder, and the other end of the spring ring is rotatably connected to one end of the second sub-cylinder.

[0009] In one embodiment, at least two hinged balls are provided at one end of the shrapnel ring close to the first sub-cylinder, and at least two hinged sliders are provided at one end of the inner circumferential wall of the first sub-cylinder close to the second sub-cylinder, and the hinged balls and the hinged sliders are detachably connected.

[0010] In one of the embodiments, at least two extrusion members are provided at one end of the spring ring close to the second sub-cylinder. During the sample removal stage, the spring ring drives the extrusion members to squeeze the sample so that the sample breaks.

[0011] In one of the embodiments, a push block is provided between the extrusion member and the outer cylinder. In the sampling stage, the extrusion member pushes the push block so that the outer cylinder and the plurality of sub-cylinder bodies do not rotate relative to each other. In the inner cylinder removal stage and the sample removal stage, the spring ring drives the extrusion member to move so that the extrusion member no longer pushes the push block, so that the outer cylinder and the plurality of sub-cylinder bodies rotate relative to each other.

[0012] In one embodiment, the sub-cylinder includes a first cylinder and a second cylinder, the second cylinder is rotatably sleeved on the first cylinder, and when the first cylinder and the second cylinder rotate relative to each other, the extrusion member is driven to rotate relative to the sample.

[0013] In one embodiment, at least two second sliding bolts and at least two second rotating blocks are provided between the first cylinder and the second cylinder, the second sliding bolts are used to limit the relative movement of the first cylinder and the second cylinder along the first axis, and the second rotating blocks are used to limit the relative rotation of the first cylinder and the second cylinder during the sampling stage.

[0014] In one embodiment, at least two of the articulated sliders are provided with sliding protrusions, and at least two of the second rotating blocks are provided with sliding grooves, and the sliding grooves and the sliding protrusions are used to drive the second rotating blocks to move along the first axis when the articulated slider moves perpendicular to the first axis.

[0015] In one embodiment, the articulated slider is provided with a scribing structure, and the scribing structure is used to scribble on the surface of the sample.

[0016] The beneficial effects of the present invention are: The present invention provides a geotechnical engineering exploration drilling device, comprising: an inner cylinder and an outer cylinder, the inner cylinder and the outer cylinder are arranged along a first axis, the outer peripheral wall of the inner cylinder is close to the inner peripheral wall of the outer cylinder, the inner cylinder comprises a plurality of sub-cylinder bodies, the plurality of sub-cylinder bodies are connected end to end along the first axis, adjacent sub-cylinder bodies are detachably connected, the plurality of sub-cylinder bodies are used to take out samples in sections, and the first axis is the central axis of the outer cylinder. Thus, by segmenting the inner cylinder into a plurality of sub-cylinder bodies, the samples can be taken out in sections during the sample taking out stage, which can avoid the problem that the core samples fall off quickly when the traditional geotechnical engineering exploration drilling device takes out the core samples, and the core samples cannot be correctly sorted. The segmented sampling also makes it easier to segment the soft core and the complete hard core and put them into the sample box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a geotechnical engineering survey drilling device provided by an embodiment of the present invention; Figure 2 An exploded diagram of a geotechnical engineering survey drilling device provided by an embodiment of the present invention; Figure 3 An exploded view of the inner cylinder of a geotechnical engineering survey drilling device provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a shrapnel ring in a geotechnical engineering survey and drilling device provided by an embodiment of the present invention; Figure 5 A schematic structural diagram of a second cylinder of a geotechnical engineering investigation and drilling device provided in one embodiment of the present invention; Figure 6 An exploded view of the structure of a second sliding bolt, a first rotating block and a second rotating block of a geotechnical engineering investigation and drilling device provided in one embodiment of the present invention; Figure 7 A side view of a geotechnical engineering investigation and drilling device provided by an embodiment of the present invention; Figure 8 for Figure 7 AA cross-sectional view of the initial state of the shrapnel ring in the geotechnical engineering investigation drilling device; Fig. 9 for Figure 8The structural diagram of the geotechnical engineering investigation and drilling device at location B; Fig.10 for Figure 7 AA cross-sectional view of the shrapnel ring in the first state of the geotechnical engineering investigation and drilling device; Fig.11 for Fig.10 Schematic diagram of the structure at location C of the geotechnical engineering investigation and drilling device.

[0018] in: 100. Outer cylinder; 200, inner cylinder; 210, first sub-cylinder; 220, second sub-cylinder; 230, first cylinder; 231, shrapnel ring; 232, fixing bolt; 233, first sliding bolt; 234, first bolt hole; 235, hinged ball; 236, first rotating block; 237, first sliding groove; 238, protrusion; 240, second cylinder; 241, top block; 242, top block groove; 243, hinged slider; 244, sliding protrusion; 245, hinged sliding groove; 246, second sliding bolt; 247, second bolt hole; 248, bolt groove; 249, second rotating block; 251, sliding groove; 252, second sliding groove; 300, sleeve; 310, groove; 320, first sleeve; 330, second sleeve; 340, hinge shaft. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0022] Refer to the following Figure 1-Figure 11 The geotechnical engineering investigation and drilling device provided by an embodiment of the present invention is described.

[0023] The geotechnical engineering investigation drilling device provided in the embodiment of the present invention is particularly suitable for drilling operations in the process of geotechnical engineering investigation. Of course, it can also be used for drilling work for sampling and analyzing strata in other geological exploration fields.

[0024] Specifically, Figure 1-Figure 2 As shown, the geotechnical engineering survey drilling device includes an outer cylinder 100, an inner cylinder 200 and a salvage device (not shown in the figure). The outer cylinder 100 is used for crushing and cutting the rock and soil, the inner cylinder 200 is used for accommodating the core sample, and the salvage device is used for taking out the inner cylinder 200. The inner cylinder 200 is arranged inside the outer cylinder 100, and the outer peripheral wall surface of the inner cylinder 200 is closely attached to the inner peripheral wall surface of the outer cylinder 100.

[0025] The geotechnical engineering investigation drilling device has a sampling stage, an inner cylinder removal stage and a sample removal stage during use. In the sampling stage, the geotechnical engineering investigation drilling device goes down into the rock and soil for sampling; in the inner cylinder removal stage, the salvage device removes the inner cylinder 200 from the outer cylinder 100; in the sample removal stage, the core sample is removed from the inner cylinder 200.

[0026] When using a conventional geotechnical engineering survey drilling device, hammering the outer wall of the outer cylinder 100 will cause the core samples to fall off quickly, thereby causing the core samples to be mixed or the markings to be unclear, resulting in a disordered order of the core samples. Figure 2As shown, in order to clarify the order of core samples during sampling, the geotechnical engineering exploration drilling device provided by the embodiment of the present invention makes the inner cylinder 200 include multiple sub-cylinders, and the multiple sub-cylinders are connected end to end along the first axis, and the adjacent sub-cylinders are detachably connected. The multiple sub-cylinders are used to take out samples in sections, and the first axis is the central axis of the outer cylinder 100. Specifically, multiple sub-cylinders are arranged in the outer cylinder 100 for sampling, and the adjacent sub-cylinders are connected by screw thread rotation. In the sampling stage and the stage of taking out the inner cylinder, the multiple sub-cylinders are connected to form a complete inner cylinder 200, and the inner cylinder 200 and the outer cylinder 100 move synchronously; in the stage of taking out the sample, the inner cylinder 200 is separated into multiple sub-cylinders section by section by rotation, and then the cutting tool is used to split the core sample, so that a section of the core sample is taken out with the sub-cylinder. Therefore, by configuring the inner cylinder 200 to be a plurality of sub-cylinders, the core samples are taken out in sequence, thereby ensuring the order of the core samples, avoiding the problem of disordered order of the core samples due to mixing of the core samples or unclear markings, and improving the working efficiency of the geotechnical engineering survey drilling device.

[0027] In one embodiment, if Figure 2-Figure 6 As shown, when the sub-cylinders are rotated to segment the core samples, the core samples between two adjacent sub-cylinders will be scattered and fall off due to excessive damage during rotation. In order to prevent the core samples from being excessively damaged when the sub-cylinders are separated, a sleeve 300 is set inside any sub-cylinder, and the outer peripheral wall of the sleeve 300 is close to the inner peripheral wall of the sub-cylinder. In the sampling stage and the stage of removing the inner cylinder, the sleeve 300 and the sub-cylinder are relatively stationary; in the stage of removing the sample, the sleeve 300 and the sub-cylinder can rotate relatively, and the sleeve 300 is used to accommodate the sample. Specifically, a sleeve 300 is set in any sub-cylinder, and the core sample is stored in the sleeve 300, and finally the core sample is taken out from the sleeve 300. During the sampling stage, the core sample enters the sleeve 300, and the core sample continues to enter the sleeve 300; during the inner cylinder removal stage, the sleeve 300 is taken out of the outer cylinder 100 along with the sub-cylinder; during the sample removal stage, when the adjacent sub-cylinders are separated by threaded rotation, the inner and outer walls of the sleeve 300 are affected by the friction of the core sample, and the sleeve 300 does not rotate synchronously with the sub-cylinders. After the sub-cylinders are separated, the sleeve 300 in the sub-cylinders is taken out, and finally the core sample in the sleeve 300 is taken out.

[0028] Since the surface of the core sample is rough and the material is hard, the friction between the core sample and the sleeve 300 is relatively large. The contact surface between the sleeve 300 and the inner cylinder 200 is smooth and the friction is relatively small. When the sub-cylinder is rotated, the sleeve 300 and the sub-cylinder will rotate relative to each other, thereby reducing the damage to the core sample caused by the rotation of the sub-cylinder. The sleeve 300 is provided to avoid excessive damage to the core sample due to the rotation between the sub-cylinders when the sub-cylinders are separated, so that the core sample is scattered and falls off.

[0029] Further, such as Figure 2-Figure 3 As shown, a circle of protrusions 238 are provided on the inner wall of the sub-cylinder, and a circle of grooves 310 are provided on the sleeve 300. When the sleeve 300 is installed, the protrusions 238 are in the grooves 310, so that the sleeve 300 and the sub-cylinder do not slide relative to each other along the first axis; when the sleeve 300 is removed, the sleeve 300 is pushed toward one end of the groove 310, so that the protrusions 238 are separated from the groove 310, thereby removing the sleeve 300 from the sub-cylinder. Thus, the sleeve 300 is fixed by a simple structure, and the working efficiency of assembling and disassembling the sleeve 300 is improved.

[0030] In particular, in order to better remove the core sample in the sleeve 300, the sleeve 300 is divided into a first sleeve 320 and a second sleeve 330, and the first sleeve 320 and the second sleeve 330 are rotatably connected by a hinge shaft 340, so that after the sleeve 300 is taken out, the first sleeve 320 and the second sleeve 330 can be rotatably separated, thereby completely removing the core sample.

[0031] In one embodiment, if Figure 2-Figure 11 As shown, in this embodiment, the inner cylinder 200 includes at least a first sub-cylinder 210 and a second sub-cylinder 220 adjacent to each other. In order to better obtain a complete core sample, taking the first sub-cylinder 210 and the second sub-cylinder 220 as an example, a spring ring 231 is provided between the first sub-cylinder 210 and the second sub-cylinder 220, one end of the spring ring 231 is detachably connected to one end of the first sub-cylinder 210, and the other end of the spring ring 231 is rotatably connected to one end of the second sub-cylinder 220. Specifically, a self-locking buckle is provided on the inner circumferential wall surface of the first sub-cylinder 210 close to the end of the second sub-cylinder 220, one end of the spring ring 231 is detachably connected to the self-locking buckle, and the other end of the spring ring 231 is rotatably connected to the second sub-cylinder 220 through a fixing bolt 232, so that the spring ring 231 is only twisted along the first axis when the first sub-cylinder 210 and the second sub-cylinder 220 rotate.

[0032] During the use of the geotechnical engineering exploration drilling device, the shrapnel ring 231 has a first state and a second state. In the first state, the first sub-barrel 210 and the second sub-barrel 220 rotate relative to each other, the two ends of the shrapnel ring 231 gradually move away from each other, and the detachable end of the shrapnel ring 231 always contacts the first sub-barrel 210; in the second state, the first sub-barrel 210 and the second sub-barrel 220 are separated, at which time the detachable end of the shrapnel ring 231 is separated from the first sub-barrel 210, and the shrapnel ring 231 no longer contacts the first sub-barrel 210. Therefore, by setting the shrapnel ring 231, when the first sub-barrel 210 and the second sub-barrel 220 are separated, the core sample does not directly contact the separation point of the first sub-barrel 210 and the second sub-barrel 220, but contacts the shrapnel ring 231, thereby better ensuring the integrity of the core sample.

[0033] Furthermore, the shrapnel ring 231 is provided between adjacent sub-cylinders so that when any sub-cylinder is impacted or vibrated during movement, the shrapnel ring 231 can play a certain buffering role, and the elastic deformation of the shrapnel ring 231 can absorb part of the impact energy and reduce the collision between the sub-cylinders. At the same time, the shrapnel ring 231 can prevent the sub-cylinders from loosening or disconnecting due to external forces such as vibration and torsion during the drilling process, thereby ensuring the stability of the overall structure of the core sample.

[0034] In one embodiment, if Figure 2-Figure 9 As shown, in order to better separate the first sub-barrel 210 and the second sub-barrel 220, at least two hinge balls 235 are provided at one end of the spring ring 231 close to the first sub-barrel 210, and at least two hinge sliders 243 are provided at one end of the inner circumferential wall of the first sub-barrel 210 close to the second sub-barrel 220, and the hinge balls 235 and the hinge sliders 243 are detachably connected. Specifically, the first sub-barrel 210 and the second sub-barrel 220 are further connected through the hinge balls 235 on the spring ring 231 and the hinge sliders 243 of the first sub-barrel 210. When the first sub-cylinder 210 and the second sub-cylinder 220 do not rotate relative to each other, the spring ring 231 is always in the initial state; when the first sub-cylinder 210 and the second sub-cylinder 220 rotate relative to each other, when the second sub-cylinder 220 moves away from the first sub-cylinder 210, the two ends of the spring ring 231 gradually move away from each other, and the spring ring 231 is in the first state at this time; when the first sub-cylinder 210 and the second sub-cylinder 220 are completely separated, the spring ring 231 is in the second state, and the articulated ball 235 and the articulated slider 243 are separated at this time. By providing the articulated ball 235 and the articulated slider 243, it is more convenient and quick to completely separate the first sub-cylinder 210 and the second sub-cylinder 220, thereby improving the working efficiency of the geotechnical engineering exploration drilling device.

[0035] In one embodiment, if Figure 2-Figure 9As shown, in order to make the core sample break at the separation point of the inner cylinder 200, at least two extrusion members are arranged at one end of the spring ring 231 close to the second sub-cylinder 220. In the stage of taking out the sample, the spring ring 231 drives the extrusion members to squeeze the sample so that the sample breaks. Specifically, taking the extrusion member as the first sliding bolt 233 as an example, at least two first bolt holes 234 are arranged at one end of the spring ring 231 close to the second sub-cylinder 220. Any first sliding bolt 233 has enough length to squeeze the core sample. Any first sliding bolt 233 is inserted into part of the first bolt holes 234 so that the extrusion force of at least two first sliding bolts 233 on the core sample does not reach a balanced state in the direction perpendicular to the first axis. Since the core sample here only contacts the spring ring 231, when the extrusion force on the core sample is unbalanced, the core sample will produce stress concentration in the extrusion area. The stress concentration will reduce the strength of the core sample in these areas, thereby causing the core sample to break at the extrusion point. When the spring ring 231 is in the initial state, the first sliding bolt 233 presses the inner wall of the first sub-cylinder 210 outward; when the spring ring 231 is in the first state, the spring ring 231 moves and drives the first sliding bolt 233 to move along the first axis, so that the first sliding bolt 233 no longer presses the inner wall of the first sub-cylinder 210, and the first sliding bolt 233 starts to squeeze the core sample. When the spring ring 231 is in the second state, the first sub-cylinder 210 and the second sub-cylinder 220 are separated, and the first sliding bolt 233 is separated from the first sub-cylinder 210 along with the spring ring 231, and the spring ring 231 is released so that the first sliding bolt 233 no longer presses the core sample. Therefore, by providing at least two first sliding bolts 233, the core sample can be better broken in sections, thereby improving the utilization rate and working efficiency of the geotechnical tooling exploration and drilling device.

[0036] In one embodiment, if Figure 2-Figure 11As shown, due to the relative rotation of the sub-cylinder and the outer cylinder 100, the rock and soil samples in the sub-cylinder will be disturbed, resulting in changes in the original structure and properties of the samples, thereby affecting the sampling quality. In order to prevent the multiple sub-cylinders and the outer cylinder 100 from rotating, a push block 241 is set between the first sliding bolt 233 and the outer cylinder 100. In the sampling stage, the first sliding bolt 233 pushes the push block 241, so that the outer cylinder 100 and the multiple sub-cylinders do not rotate relative to each other. In the stage of removing the inner cylinder and the stage of removing the sample, the spring ring 231 drives the first sliding bolt 233 to move, so that the first sliding bolt 233 no longer pushes the push block 241, so that the outer cylinder 100 and the multiple sub-cylinders rotate relative to each other. Specifically, a top block 241 is provided between any first sliding bolt 233 and the outer cylinder 100, at least two top block grooves 242 are provided on the sub-cylinder, and the top block 241 is provided in the top block groove 242, and the top block groove 242 allows the top block 241 to move only in the top block groove 242. During the sampling stage, the spring ring 231 is in the initial state, and any first sliding bolt 233 pushes any top block 241, so that at least two top blocks 241 squeeze the outer cylinder 100, increasing the friction between the top block 241 and the outer cylinder 100, so that the outer cylinder 100 and the sub-cylinder do not rotate relative to each other; during the stage of removing the inner cylinder, the salvage device first rotates the sub-cylinder farthest from the drill bit, so that the spring ring 231 in the sub-cylinder enters the first state, and the spring ring 231 drives the first sliding bolt 233 to move , reducing the squeezing force of the first sliding bolt 233 on the top block 241, so that the friction between the top block 241 and the outer cylinder 100 is reduced, the salvage device continues to rotate the sub-cylinder, and the sub-cylinder and the adjacent sub-cylinder rotate relative to each other, so that the spring ring 231 drives the first sliding bolt 233 to move, so that all the sub-cylinders and the outer cylinder 100 rotate relative to each other, and the salvage device lifts out all the sub-cylinders to complete the inner cylinder removal stage; when the sample is removed, the top block 241 and the first sliding bolt 233 no longer work. Therefore, by setting the top block 241, the outer cylinder 100 and the sub-cylinder are prevented from rotating relative to each other during the sampling stage.

[0037] In one embodiment, if Figure 2-Figure 11As shown, in order to better separate the core sample, the sub-cylinder includes a first cylinder 230 and a second cylinder 240, and the second cylinder 240 is rotatably sleeved on the first cylinder 230. When the first cylinder 230 and the second cylinder 240 rotate relative to each other, the first sliding bolt 233 is driven to rotate relative to the sample. Specifically, the first cylinder 230 includes a spring ring 231 and a first sliding bolt 233, and the second cylinder 240 includes a top block 241 and a hinged slider 243. In the sampling stage and the stage of removing the inner cylinder, the first cylinder 230 and the second cylinder 240 of the sub-cylinder do not rotate relative to each other; in the stage of removing the sample, the first cylinder 230 and the second cylinder 240 rotate relative to each other, thereby driving the first sliding bolt 233 to rotate obliquely around the core sample, and at the same time, the first sliding bolt 233 continuously squeezes the core sample, so that there are weak areas such as stress concentration points, crystal defects or fine cracks at the microscopic level inside the core sample. When at least two first sliding bolts 233 rotate and squeeze the core sample, the weak area will be subjected to stress far exceeding that of other parts. As the first sliding bolts 233 continue to rotate and squeeze the core sample, the stress continues to accumulate. When the stress exceeds the bearing limit of the weak area, the cracks begin to expand and connect, so that the core sample breaks or has a tendency to break in this section. By setting the first cylinder 230 and the second cylinder 240 that can rotate relatively, the first sliding bolt 233 can rotate and squeeze the core sample, effectively splitting the core sample. At the same time, the first sliding bolt 233 can accurately rotate and squeeze the same section of the core sample, which can protect the integrity of other parts of the core sample to a greater extent, further reducing the labor intensity of the staff and improving work efficiency.

[0038] In one embodiment, if Figure 2-Figure 11 As shown, in order to prevent the first cylinder 230 and the second cylinder 240 from relative movement during the sampling stage, at least two second sliding bolts 246 and at least two second rotating blocks 249 are arranged between the first cylinder 230 and the second cylinder 240. The second sliding bolts 246 are used to limit the relative movement of the first cylinder 230 and the second cylinder 240 along the first axis, and the second rotating blocks 249 are used to limit the relative rotation of the first cylinder 230 and the second cylinder 240 during the sampling stage.

[0039] Specifically, a bolt groove 248 is provided at one end of the first cylinder 230 close to the second cylinder 240, and at least two second bolt holes 247 are provided at one end of the second cylinder 240 close to the first cylinder 230. Any second sliding bolt 246 passes through any second sliding bolt hole 247 and abuts on the bolt groove 248. The second sliding bolt 246 moves perpendicularly to the first axis in the second bolt hole 247. The first cylinder 230 is provided with a first sliding groove 237, and the second cylinder 240 is provided with a second sliding groove 252. The second rotating block 249 is located in the first sliding groove 237 and the second sliding groove 252 and moves along the first axis. The second sliding bolt 246 always limits the relative movement of the first cylinder 230 and the second cylinder 240 along the first axis in the bolt groove 248. In the sampling stage and the stage of removing the inner cylinder, the second rotating block 249 restricts the relative rotation of the first cylinder 230 and the second cylinder 240; in the stage of removing the sample, the second rotating block 249 no longer restricts the relative rotation of the first cylinder 230 and the second cylinder 240. A hinged sliding groove 245 is provided on the second cylinder 240, and the hinged slider 243 is located in the hinged sliding groove 245 and slides perpendicularly to the first axis. One end of the second rotating block 249 abuts against the hinged slider 243, so that the movement of the hinged slider 243 drives the second rotating block 249 to move.

[0040] When the spring ring 231 is in the initial state, the articulated ball 235 drives the articulated slider 243 to be located at the farthest distance from the first axis, so that the second rotating block 249 is located at the junction of the first cylinder 230 and the second cylinder 240. At this time, the second rotating block 249 restricts the first cylinder 230 and the second cylinder 240 from rotating relative to each other; when the spring ring 231 is in the early stage of the first state, the articulated ball 235 on the spring ring 231 drives the articulated slider 243 to move toward the first axis, so that the second rotating block 249 moves along the first axis. Move in the direction away from the second sliding bolt 246; when the spring ring 231 is in the late stage of the first state, the distance between the articulated slider 243 and the first axis reaches the minimum value, so that one end of at least two second rotating blocks 249 completely enters the second cylinder 240, and the first cylinder 230 and the second cylinder 240 can rotate relative to each other; when the spring ring 231 is in the third state, the second cylinder 240 drives the second rotating block 249 to move, and at the same time the second rotating block 249 limits the articulated slider 243 from moving away from the first axis.

[0041] By providing at least two second sliding bolts 246 and at least two second rotating blocks 249, the relative rotation between the first cylinder 230 and the second cylinder 240 is effectively limited during the sampling stage, thereby ensuring the integrity of the core sample during the sampling stage and avoiding damage to the sample caused by the relative rotation of the first cylinder 230 and the second cylinder 240. At the same time, the first cylinder 230 and the second cylinder 240 can be relatively rotated during the sample removal stage, thereby successfully completing the sampling.

[0042] Furthermore, in order to better prevent the first cylinder 230 and the second cylinder 240 from rotating relative to each other, a first rotating block 236 is provided between adjacent second sliding bolts 246. The first rotating block 236 moves along the first axis in the first sliding groove 237. One end of any first rotating block 236 abuts against the first cylinder 230, and the other end of the first rotating block 236 abuts against the second rotating block 249. When the spring ring 231 is in the initial state, the first rotating block 236 blocks between the second sliding bolts 246, and the second rotating block 249 is located at the junction of the first cylinder 230 and the second cylinder 240. At this time, the first rotating block 236 and the second rotating block 249 simultaneously restrict the first cylinder 230 and the second cylinder 240 from moving relative to each other. When the spring ring 231 is in the early stage of the first state, the second rotating block 249 drives the first rotating block 236 to move along the first axis in the direction away from the second sliding bolt 246. When the spring ring 231 is in the initial state, the second rotating block 249 drives the first rotating block 236 to move in the direction away from the second sliding bolt 246. When the ring 231 is in the late stage of the first state, the first rotating block 236 and the second rotating block 249 no longer restrict the second sliding bolt 246, and at this time, the first cylinder 230 and the second cylinder 240 can rotate relative to each other, and the first cylinder 230 drives the first rotating block 236 to move, and the second cylinder 240 drives the second rotating block 249 to move; when the spring ring 231 is in the third state, the first cylinder 230 drives at least two first rotating blocks 236 to move, and the second cylinder 240 drives at least two second rotating blocks 249 to move. In this way, the relative movement of the first cylinder 230 and the second cylinder 240 perpendicular to the first axis can be better restricted.

[0043] In one embodiment, if Figure 2-Figure 11 As shown, in order to better enable the articulated slider 243 to drive the second rotating block 249 to slide, at least two articulated sliders 243 are provided with sliding protrusions 244, and at least two second rotating blocks 249 are provided with sliding grooves 251. The sliding grooves 251 and the sliding protrusions 244 are used to enable the articulated slider 243 to drive the second rotating block 249 to move along the first axis when the articulated slider 243 moves perpendicular to the first axis. Specifically, when the articulated slider 243 moves under the action of the spring ring 231, the sliding protrusions 244 on the articulated slider 243 drive the second rotating block 249 to move. As a result, at least two second rotating blocks 249 can make corresponding movements smoothly and quickly, thereby improving the working efficiency of the geotechnical engineering exploration drilling device.

[0044] In one embodiment, the core sample is squeezed by the first sliding bolt 233, causing the core sample to be irregularly split, which may affect the integrity of the core sample. In order to make the core sample break better, the articulated slider 243 is provided with a scribing structure, which is used to scribble on the sample surface. Specifically, the scribing structure is usually made of a wear-resistant material with high hardness. When the first cylinder 230 and the second cylinder 240 rotate relative to each other, the second rotating block 249 limits the movement of the articulated slider 243, so that the scribing structure on the articulated slider 243 contacts the core sample. When the first cylinder 230 and the second cylinder 240 rotate relative to each other, the scribing structure rotates around the core sample, and the sharp edge of the scribing structure contacts the surface of the core sample. With the help of the friction generated by the rotation and the appropriate downward pressure of the articulated slider 243, the scribing structure draws a ring-shaped line mark on the core sample. At the same time, the first sliding bolt 233 located near the marking structure applies a squeezing force to the core sample, and this squeezing effect significantly increases the local stress of the core sample at the marking point. Since the marking structure causes certain damage and stress concentration to the surface of the core sample, and the squeezing of the core sample by the first sliding bolt 233, the stress of the core sample at the marking point exceeds its own tensile strength limit, thereby causing the core sample to break at the marking point. By setting the marking structure, the core sample can be accurately broken, avoiding the irregular fracture that may occur in the traditional method, which is conducive to the subsequent neat and standardized processing of the core sample, while reducing the damage to the overall structure of the core sample, ensuring that other parts except the marking fracture point remain relatively intact, and providing more accurate samples for subsequent geological analysis.

[0045] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A geotechnical engineering survey drilling device, characterized in that: include: An inner cylinder and an outer cylinder, wherein the inner cylinder and the outer cylinder are arranged along a first axis, the outer peripheral wall of the inner cylinder is closely attached to the inner peripheral wall of the outer cylinder, the inner cylinder comprises a plurality of sub-cylinder bodies, the plurality of sub-cylinder bodies are connected end to end along the first axis, adjacent sub-cylinder bodies are detachably connected, and the plurality of sub-cylinder bodies are used to take out samples in sections, and the first axis is the central axis of the outer cylinder; The geotechnical engineering investigation and drilling device forms a sampling stage, an inner cylinder removal stage and a sample removal stage during use. When in the sampling stage, the geotechnical engineering investigation and drilling device enters geotechnical sampling; when in the inner cylinder removal stage, the inner cylinder is removed from the outer cylinder; when in the sample removal stage, the core sample is removed from the inner cylinder.

2. A geotechnical engineering survey drilling device according to claim 1, characterized in that: A sleeve is arranged inside any of the sub-cylinder bodies, and the outer circumferential wall surface of the sleeve is in close contact with the inner circumferential wall surface of the sub-cylinder body. When in the sampling stage and the inner cylinder removal stage, the sleeve and the sub-cylinder body are relatively stationary; when in the sample removal stage, the sleeve and the sub-cylinder body can rotate relatively, and the sleeve is used to accommodate the sample.

3. A geotechnical engineering survey drilling device according to claim 1, characterized in that: The inner cylinder at least includes a first sub-cylinder and a second sub-cylinder that are adjacent to each other, a spring ring is arranged between the first sub-cylinder and the second sub-cylinder, one end of the spring ring is detachably connected to one end of the first sub-cylinder, and the other end of the spring ring is rotatably connected to one end of the second sub-cylinder.

4. A geotechnical engineering survey drilling device according to claim 3, characterized in that: At least two hinged balls are arranged at one end of the shrapnel ring close to the first sub-cylinder, and at least two hinged sliders are arranged at one end of the inner circumferential wall of the first sub-cylinder close to the second sub-cylinder. The hinged balls and the hinged sliders are detachably connected.

5. A geotechnical engineering survey drilling device according to claim 4, characterized in that: At least two extrusion members are arranged at one end of the spring ring close to the second sub-cylinder. During the sample removal stage, the spring ring drives the extrusion members to squeeze the sample so that the sample breaks.

6. A geotechnical engineering investigation and drilling device according to claim 5, characterized in that: A push block is arranged between the extrusion member and the outer cylinder. In the sampling stage, the extrusion member pushes the push block so that the outer cylinder and the plurality of sub-cylinder bodies do not rotate relative to each other. In the inner cylinder removal stage and the sample removal stage, the spring ring drives the extrusion member to move so that the extrusion member no longer pushes the push block so that the outer cylinder and the plurality of sub-cylinder bodies rotate relative to each other.

7. A geotechnical engineering investigation and drilling device according to claim 5, characterized in that: The sub-cylinder includes a first cylinder and a second cylinder. The second cylinder is rotatably sleeved on the first cylinder. When the first cylinder and the second cylinder rotate relative to each other, the extrusion member is driven to rotate relative to the sample.

8. A geotechnical engineering investigation and drilling device according to claim 7, characterized in that: At least two second sliding bolts and at least two second rotating blocks are arranged between the first cylinder and the second cylinder, the second sliding bolts are used to limit the relative movement of the first cylinder and the second cylinder along the first axis, and the second rotating blocks are used to limit the relative rotation of the first cylinder and the second cylinder during the sampling stage.

9. A geotechnical engineering investigation and drilling device according to claim 8, characterized in that: At least two of the articulated sliders are provided with sliding protrusions, and at least two of the second rotating blocks are provided with sliding grooves. The sliding grooves and the sliding protrusions are used to drive the second rotating blocks to move along the first axis when the articulated slider moves perpendicular to the first axis.

10. A geotechnical engineering investigation and drilling device according to claim 8, characterized in that: The articulated slider is provided with a marking structure, and the marking structure is used for marking a line on the surface of the sample.

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