Core sampling device

Abstract

This invention discloses a core sampling device, including a sampling mechanism, a driving mechanism, and a cutting mechanism. The sampling mechanism includes a sampling cylinder with a sampling space, a sampling inlet, and a cutting hole. The sampling inlet is located at the bottom of the sampling cylinder and communicates with the sampling space. The cutting hole communicates with the sampling space and is spaced apart from the sampling inlet. The driving mechanism drives the sampling cylinder to drill into the rock. The sampling inlet allows the rock core to enter the sampling space. The cutting mechanism is movably inserted through the cutting hole to cut the rock core located in the sampling space. Thus, it is possible to reduce damage to the rock while ensuring sampling efficiency. This application has wide applications in the field of core sampling technology.

Description

Technical Field

[0001] This invention relates to the field of core sampling technology, and in particular to a core sampling device. Background Technology

[0002] Core sampling involves obtaining rock cores, rock cuttings, or rock powder as samples through drilling. Currently, most methods involve splitting the rock in half using a core splitter or sawing it in half with a diamond saw blade. However, current core sampling methods often require rock crushing, causing significant damage to the rock. Furthermore, current core sampling equipment cannot quickly cut the rock during the sampling process, resulting in low sampling efficiency. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a core sampling device that can reduce damage to the rock while ensuring sampling efficiency.

[0004] A core sampling apparatus according to a first aspect embodiment of this application includes:

[0005] A sampling mechanism, comprising a sampling tube, the sampling tube having a sampling space, a sampling inlet and a cutting hole, the sampling inlet being located at the bottom of the sampling tube and communicating with the sampling space, and the cutting hole being connected to the sampling space and spaced apart from the sampling inlet;

[0006] A driving mechanism is provided to drive the sampling cylinder to drill into the rock, and the sampling port is used to allow the rock core to enter the sampling space.

[0007] A cutting mechanism, which is movably inserted through the cutting hole, is used to cut the rock core located in the sampling space.

[0008] The core sampling device according to the embodiments of this application has at least the following beneficial effects: By providing a sampling chamber and an inlet and a cutting hole connecting the sampling space through the sampling tube, and by allowing the cutting mechanism to be movably inserted through the cutting hole, the core sampling device, during operation, drives the sampling tube to drill into the rock via a drive mechanism, allowing the core to enter the sampling space through the inlet at the bottom of the sampling tube. Then, the cutting mechanism moves relative to the cutting hole to extend into the sampling space, thereby cutting off the core located in the sampling space, thus quickly separating the core from the rock and improving sampling efficiency. Furthermore, the rock is only damaged at the location where the sampling tube drills in; the sampling tube only needs to cut the core during sampling, without breaking the entire rock, which helps to reduce damage to the rock. Therefore, it is possible to reduce damage to the rock while ensuring sampling efficiency.

[0009] According to some embodiments of this application, the sampling cylinder is provided with an installation cavity, the sampling space is disposed at the center of the sampling cylinder, the installation cavity is connected to the sampling space through the cutting hole, and the cutting mechanism is installed in the installation cavity.

[0010] According to some embodiments of this application, the mounting cavity includes a first chamber and a second chamber, the first chamber and the second chamber are interconnected at the end of the sampling tube away from the inlet, the cutting hole is connected to the first chamber and the second chamber respectively, the cutting mechanism includes a first cutting component, a second cutting component, a cutting drive component and a transmission component, the first cutting component is installed in the first chamber, the second cutting component is installed in the second chamber, the cutting drive component is connected to the first cutting component, the first cutting component and the second cutting component are respectively drivenly connected to the transmission component, and the transmission component is used to drive the first cutting component and the second cutting component to move simultaneously.

[0011] According to some embodiments of this application, the first cutting component and the second cutting component are arranged symmetrically along the center of the sampling space.

[0012] According to some embodiments of this application, the first cutting assembly includes a first support rod and a first cutter, and the second cutting assembly includes a second support rod and a second cutter. The first support rod and the second support rod extend along the length direction of the sampling cylinder. The first cutter and the second cutter are located at one end of the sampling cylinder near the inlet. One end of the first cutter is connected to the first support rod and extends towards the sampling space. One end of the second cutter is connected to the second support rod and extends towards the sampling space. The transmission assembly is connected to the ends of the first support rod and the second support rod away from the inlet. The cutting drive is installed inside the sampling cylinder and connected to the first support rod. The cutting drive is used to drive the first support rod to move towards or away from the sampling space.

[0013] According to some embodiments of this application, the transmission assembly includes a first rack, a second rack, and a transmission gear. The transmission gear is rotatably connected to the inner wall of the sampling cylinder. The first rack is connected to the first support rod and extends along the direction of movement of the first support rod. The second rack is connected to the second support rod and extends along the direction of movement of the second support rod. The first rack and the second rack are spaced apart along the length direction of the sampling cylinder and are respectively located on both sides of the transmission gear. The first rack and the second rack are respectively meshed with the transmission gear.

[0014] According to some embodiments of this application, the cutting mechanism further includes two sets of guide components. The guide components include a first guide rod and a second guide rod. The first guide rod and the second guide rod are spaced apart along the length direction of the sampling cylinder and fixedly connected to the inner wall of the sampling cylinder. In one set of guide components, the first guide rod and the second guide rod extend along the movement direction of the first support rod and are slidably connected to the first support rod. In the other set of guide components, the first guide rod and the second guide rod extend along the movement direction of the second support rod and are slidably connected to the second support rod.

[0015] According to some embodiments of this application, the sampling mechanism further includes a drill bit disposed at the bottom of the sampling tube, and the center of the drill bit is provided with a sampling through hole. The sampling through hole extends through both sides of the drill bit along the length direction of the sampling tube and is connected to the sampling inlet.

[0016] According to some embodiments of this application, the drill bit includes a first end and a second end, the first end is connected to the sampling cylinder, and the diameter of the sampling through hole gradually increases along the direction from the first end to the second end.

[0017] According to some embodiments of this application, the driving mechanism includes a rotating unit and a pushing unit. The output end of the rotating unit is connected to the sampling cylinder, and the output end of the pushing unit is connected to the rotating unit. The pushing unit is used to drive the sampling cylinder to move towards the rock after the sampling cylinder has rotated stably.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 This is a schematic diagram of the core sampling device disclosed in the embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the sampling mechanism disclosed in the embodiments of this application;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a schematic diagram of the structure of the rotating unit disclosed in the embodiments of this application;

[0024] Figure 5 This is a schematic diagram of the structure of the driving unit disclosed in the embodiments of this application.

[0025] Figure label:

[0026] 1. Core sampling device; 11. Sampling mechanism; 111. Sampling tube; 1111. Sampling space; 1112. First chamber; 1113. Second chamber; 112. Drill bit; 1121. Sampling through hole;

[0027] 12. Drive mechanism; 121. Rotating unit; 1211. Protective box; 1212. First rotating shaft; 1213. Second rotating shaft; 1214. First sampling drive component; 1215. First driving wheel; 1216. First driven wheel; 122. Pushing unit; 1221. Support box; 1222. Push rod; 1223. Second sampling drive component; 1224. Threaded rod; 1225. Push plate; 1226. Guide rod;

[0028] 13. Cutting mechanism; 131. First cutting assembly; 1311. First support rod; 1312. First cutter; 132. Second cutting assembly; 1321. Second support rod; 1322. Second cutter; 133. Cutting drive component; 134. Transmission assembly; 1341. First rack; 1342. Second rack; 1343. Transmission gear; 135. First guide rod; 136. Second guide rod;

[0029] 14. Fixed mechanism. Detailed Implementation

[0030] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0031] In the description of this application, it should be understood that the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In the description of this application, the use of terms such as "as one implementation," "an embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The contents of this application are described in detail below with reference to specific embodiments. It should be noted that the following description is merely illustrative and not a specific limitation of this application.

[0036] Please refer to the following: Figures 1 to 3 This application provides a core sampling device 1, including a sampling mechanism 11, a driving mechanism 12, and a cutting mechanism 13. The sampling mechanism 11 includes a sampling cylinder 111, which has a sampling space 1111, a sampling port, and a cutting hole. The sampling port is located at the bottom of the sampling cylinder 111 and communicates with the sampling space 1111. The sampling port is used to allow the rock core to enter the sampling space. The cutting hole communicates with the sampling space 1111 and is spaced apart from the sampling port. The driving mechanism 12 is used to drive the sampling cylinder 111 to drill into the rock so that the rock core enters the sampling space 1111 through the sampling port. The cutting mechanism 13 is movably inserted through the cutting hole to cut the rock core located in the sampling space 1111.

[0037] By providing a sampling chamber and an inlet and a cutting hole connecting the sampling space 111 within the sampling tube 111, and allowing the cutting mechanism 13 to be movably inserted through the cutting hole, the core sampling device 1, during operation, drives the sampling tube 111 to drill into the rock via the drive mechanism 12. This allows the core sample to enter the sampling space 1111 through the inlet at the bottom of the sampling tube 111. The cutting mechanism 13 then moves relative to the cutting hole to extend into the sampling space 1111, thereby cutting the core sample located within the sampling space 1111. This rapid separation of the core from the rock improves sampling efficiency. Furthermore, the rock is only damaged at the drilling point of the sampling tube 111. The sampling tube 111 only needs to cut the core during sampling, without breaking the entire rock, thus minimizing damage to the rock. Therefore, it is possible to ensure sampling efficiency while reducing damage to the rock.

[0038] In some embodiments, the sampling tube 111 is provided with an installation cavity, and the sampling space 1111 is located at the center of the sampling tube 111. The installation cavity is connected to the sampling space 1111 through a cutting hole, and the cutting mechanism 13 is installed in the installation cavity. This allows the cutting mechanism 13 to be located inside the sampling tube 111, which helps protect the cutting mechanism 13 and avoids contamination of the cutting component by debris or dust impurities during the drilling process of the sampling tube 111 into the rock, thus affecting the operation of the cutting component. Furthermore, for underwater core sampling scenarios, placing the cutting component in the installation cavity of the sampling tube 111 can also reduce the possibility of underwater organisms entanglement or hindering the movement of the cutting component, thereby improving the operational reliability of the cutting component.

[0039] Optionally, the mounting cavity includes a first chamber 1112 and a second chamber 1113. The first chamber 1112 and the second chamber 1113 are interconnected at the end of the sampling cylinder 111 away from the inlet. The cutting hole is connected to the first chamber 1112 and the second chamber 1113 respectively. The cutting mechanism 13 includes a first cutting component 131, a second cutting component 132, a cutting drive component 133, and a transmission component 134. The first cutting component 131 is installed in the first chamber 1112, the second cutting component 132 is installed in the second chamber 1113, the cutting drive component 133 is connected to the first cutting component 131, and the first cutting component 131 and the second cutting component 132 are respectively drivenly connected to the transmission component 134. The transmission component 134 is used to drive the first cutting component 131 and the second cutting component 132 to move simultaneously.

[0040] Thus, when the cutting mechanism 13 is working, the cutting drive 133 drives the first cutting component 131 to move, and the transmission component 134 moves under the drive of the first cutting component 131 to drive the second cutting component 132 to move, thereby achieving synchronous movement of the first cutting component 131 and the second cutting component 132. By setting the first chamber 1112 and the second chamber 1113 to be interconnected at the end of the sampling cylinder 111 away from the sample inlet, installation space can be reserved for the transmission component 134, so that the transmission component 134 can drive the first cutting component 131 and the second cutting component 132 to move simultaneously, thereby achieving synchronous movement of the first cutting component 131 and the second cutting component 132. By having the first cutting component 131 and the second cutting component 132 cut the rock core simultaneously, it is beneficial to improve the cutting speed of the rock core, thereby improving the core sampling efficiency.

[0041] Optionally, the number of cutting holes can be one, with the cutting holes arranged around the circumference of the sampling cylinder 111 and connected end to end; or the number of cutting holes can be two, with the two cutting holes spaced apart.

[0042] As an alternative implementation of the mounting cavity, the first chamber 1112 and the second chamber 1113 may also be spaced apart in the sampling cylinder 111 and not connected to each other. The first cutting component 131 and the second cutting component 132 are driven by different cutting drive components 133, or the cutting mechanism 13 may have only one cutting component and the mounting cavity may have only one chamber.

[0043] Optionally, the first cutting component 131 and the second cutting component 132 are symmetrical about the sampling space 1111. This allows the first cutting component 131 and the second cutting component 132 to cut from both sides of the core, which helps to increase the cutting speed of the cutting mechanism 13 on the core and thus improve the core sampling efficiency.

[0044] Understandably, in other embodiments, the first cutting component 131 and the second cutting component 132 may also be symmetrically arranged along the axis of the sampling space 1111.

[0045] In some embodiments, the first cutting assembly 131 includes a first support rod 1311 and a first cutter 1312, and the second cutting assembly 132 includes a second support rod 1321 and a second cutter 1322. The first support rod 1311 and the second support rod 1321 are along the length of the sampling cylinder 111 (see [link]). Figure 1 and Figure 2Extending in the x-direction, the first cutter 1312 and the second cutter 1322 are located at the end of the sampling cylinder 111 near the inlet. One end of the first cutter 1312 is connected to the first support rod 1311 and extends towards the sampling space 1111. One end of the second cutter 1322 is connected to the second support rod 1321 and extends towards the sampling space 1111. The transmission assembly 134 is connected to the end of the first support rod 1311 and the second support rod 1321 away from the inlet. The cutting drive 133 is installed inside the sampling cylinder 111 and connected to the first support rod 1311. The cutting drive 133 is used to drive the first support rod 1311 to move towards or away from the sampling space 1111.

[0046] In this way, the transmission assembly 134 is connected to the end of the first support rod 1311 and the second support rod 1321 furthest from the sample inlet. That is, the transmission assembly 134 is located at the position where the first chamber 1112 and the second chamber 1113 are interconnected. This allows the transmission assembly 134 to have sufficiently large operating space. Simultaneously, the first cutter 1312 and the second cutter 1322 move through the first support rod 1311 and the second support rod 1321, which helps improve the smoothness of their movement and thus enhances the reliability of core cutting. After the core is cut by the first cutter 1312 and the second cutter 1322, they can also support the core, preventing it from slipping out of the sampling space 1111 from the sample inlet, thereby improving the reliability of core sampling.

[0047] As an optional implementation, the transmission assembly 134 includes a first rack 1341, a second rack 1342, and a transmission gear 1343. The transmission gear 1343 is rotatably connected to the inner wall of the sampling cylinder 111. The first rack 1341 is connected to the first support rod 1311 and extends along the movement direction of the first support rod 1311. The second rack 1342 is connected to the second support rod 1321 and extends along the movement direction of the second support rod 1321. The first rack 1341 and the second rack 1342 are spaced apart along the length direction of the sampling cylinder 111 and are respectively located on both sides of the transmission gear 1343. The first rack 1341 and the second rack 1342 are respectively meshed with the transmission gear 1343.

[0048] Thus, when the cutting drive 133 pushes the first support rod 1311 towards the sampling space 1111, the first support rod 1311 pushes the first rack 1341 and the first cutter 1312 towards the sampling space 1111. The transmission gear 1343, meshing with the first rack 1341, rotates as the first rack 1341 moves. At this time, the second rack 1342, meshing with the transmission gear 1343, moves under the drive of the transmission gear 1343, thereby driving the second support rod 1321 and the second cutter 1322 towards the sampling space 1111. This allows the first cutter 1312 and the second cutter 1322 to simultaneously cut the rock core in the sampling space 1111, improving the efficiency of rock core cutting. Furthermore, using a rack and pinion transmission to achieve synchronous movement of the first cutting assembly 131 and the second cutting assembly 132 helps improve the smoothness of their movement.

[0049] As another optional implementation, the transmission assembly 134 includes a slide rod, a slider, a first connecting rod, and a second connecting rod. The slide rod is fixedly connected to the inner wall of the sampling cylinder 111 and extends along the length of the sampling cylinder 111. The slider is slidably connected to the slide rod. One end of the first connecting rod is hinged to the slider, and the other end of the first connecting rod is hinged to the first support rod 1311. One end of the second connecting rod is hinged to the slider, and the other end of the second connecting rod is hinged to the second support rod 1321.

[0050] Thus, when the cutting drive 133 pushes the first support rod 1311 to move closer to the sampling space 1111, one end of the first connecting rod tends to move closer to the sampling space 1111 under the drive of the first support rod 1311. At the same time, the other end of the first connecting rod is constrained by the slider and the sliding rod, so that the first connecting rod pushes the slider to move upward along the length of the sliding rod under the drive of the first support rod 1311. At this time, the second connecting rod pulls the second support rod 1321 to move closer to the sampling space 1111 under the drive of the slider, so that the second cutter 1322 moves closer to the sampling space 1111 under the drive of the second support rod 1321. This allows the first cutter 1312 and the second cutter 1322 to cut the rock core in the sampling space 1111 at the same time, thereby improving the rock core cutting efficiency.

[0051] In some embodiments, the cutting mechanism 13 further includes two sets of guide components, each including a first guide rod 135 and a second guide rod 136. The first guide rod 135 and the second guide rod 136 are spaced apart along the length of the sampling cylinder 111 and fixedly connected to the inner wall of the sampling cylinder 111. In one set of guide components, the first guide rod 135 and the second guide rod 136 extend along the movement direction of the first support rod 1311 and are slidably connected to the first support rod 1311. In the other set of guide components, the first guide rod 135 and the second guide rod 136 extend along the movement direction of the second support rod 1321 and are slidably connected to the second support rod 1321.

[0052] In this way, by restricting the movement direction of the first support rod 1311 and the second support rod 1321 through the first guide rod 135 and the second guide rod 136, it is beneficial to ensure that the two ends of the first support rod 1311 and the second support rod 1321 move synchronously during movement, avoiding the situation of one side tilting up. On the one hand, it can ensure that the end of the first support rod 1311 connected to the transmission component 134 can overcome the frictional force to drive the transmission component 134 to move, thereby driving the second support rod 1321 to move, and thus realizing the synchronous movement of the first cutter 1312 and the second cutter 1322, improving the operational reliability of the cutting mechanism 13. On the other hand, it can also ensure that the movement direction of the first cutter 1312 and the second cutter 1322 remains stable, so as to ensure the cutting efficiency of the rock core.

[0053] Optionally, the cutting drive 133 can be any of a linear motor, an electric actuator, or a hydraulic cylinder, etc. The specific configuration can be determined according to actual needs, and there are no restrictions here.

[0054] In some embodiments, the sampling mechanism 11 further includes a drill bit 112, which is disposed at the bottom of the sampling cylinder 111. The drill bit 112 has a sampling through-hole 1121 at its center, which extends along the length of the sampling cylinder 111 through both sides of the drill bit 112 and connects to the sample inlet. This allows the rock core to enter the sampling space 1111 through the sampling through-hole 1121 during the drilling process of the sampling cylinder 111, thereby improving sampling efficiency.

[0055] Optionally, the drill bit 112 includes a first end and a second end. The first end is connected to the sampling cylinder 111, and the diameter of the sampling through hole 1121 gradually increases from the first end to the second end. That is, the diameter of the sampling through hole 1121 at the second end is larger than that at the first end, and the cross-section of the sampling through hole 1121 is inverted triangular to facilitate guiding the core sample into the sampling space 1111.

[0056] Optionally, the drill bit 112 is conical, and the external dimensions of the drill bit 112 gradually decrease from the first end to the second end, so as to reduce the size of the drill bit 112 (i.e. the second end of the drill bit 112), making the drill bit sharper, which is conducive to the drill bit 112 drilling into the rock and improving the sampling efficiency.

[0057] Optionally, the diameter of the sampling through-hole 1121 at the second end is equal to or approximately equal to the external dimensions of the drill bit 112. This allows the drill bit 112 to form a sharp tip at the second end, which facilitates drilling into the rock and also helps guide the core sample into the sampling through-hole 1121 and the sampling space 1111.

[0058] As an alternative embodiment of the drill bit 112, the diameter of the sampling through hole 1121 is kept consistent along the direction from the first end to the second end, so that the diameters of the two ends of the sampling through hole 1121 are the same or approximately the same.

[0059] Please combine Figure 1 , Figure 4 and Figure 5 In some embodiments, the drive mechanism 12 includes a rotating unit 121 and a pushing unit 122. The output end of the rotating unit 121 is connected to the sampling cylinder 111, and the output end of the pushing unit 122 is connected to the rotating unit 121. The pushing unit 122 is used to drive the sampling cylinder 111 to move closer to the rock after the sampling cylinder 111 has rotated stably. This allows the sampling mechanism 11 to drill into the rock more smoothly, thereby improving the reliability of the drilling of the sampling cylinder 111 and accurately obtaining the rock core at the target location.

[0060] Optionally, the rotating unit 121 includes a protective box 1211, a first rotating shaft 1212, a second rotating shaft 1213, and a rotating drive assembly. The two ends of the first rotating shaft 1212 are rotatably connected to the inner wall of the protective box 1211. The rotating drive assembly is installed inside the protective box 1211 and connected to the first rotating shaft 1212. One end of the second rotating shaft 1213 extends movably into the protective box 1211 and is connected to the first rotating shaft 1212. The other end of the second rotating shaft 1213 is located outside the protective box 1211 and is connected to the sampling cylinder 111. The output end of the pushing unit 122 is connected to the protective box 1211.

[0061] In this way, the first rotating shaft 1212 is driven to rotate by the rotary drive assembly, and the sampling cylinder 111 is driven to rotate by the second rotating shaft 1213, thereby driving the drill bit 112 to rotate stably. Then, the protective box 1211 and the internal structure of the protective box 1211 are driven by the push unit 122 to move towards the rock, so that the rotating sampling cylinder 111 and the drill bit 112 move towards the rock, realizing the drilling of the rock. By setting the first rotating shaft 1212 to be rotatably connected to the protective box 1211 and the second rotating shaft 1213 to be indirectly connected to the rotary drive assembly, the stability of the rotational movement of the sampling mechanism 11 can be improved, and the connection between the protective box 1211 and the sampling cylinder 111 can be realized, so that the rotating unit 121 and the sampling mechanism 11 can move synchronously under the drive of the push unit 122, so that the sampling mechanism 11 can complete both rotation and movement at the same time. Meanwhile, by setting the first rotating shaft 1212 and the rotating drive assembly inside the protective box 1211, the rotating drive assembly and the first rotating shaft 1212 can be protected, avoiding contamination of the rotating unit 121 by debris or dust impurities during the drilling process of the sampling mechanism 11 into the rock, which would affect the operation of the rotating unit 121. Furthermore, for underwater core sampling scenarios, setting the rotating drive assembly and the first rotating shaft 1212 inside the protective box 1211 can also reduce the possibility of underwater organisms getting entangled or hindering movement, thereby improving the operational reliability of the rotating unit 121.

[0062] Optionally, the rotary drive assembly includes a first sampling drive 1214, a first driving wheel 1215, and a first driven wheel 1216. The first driven wheel 1216 is sleeved on the outer periphery of the first rotating shaft 1212. The first driving wheel 1215 is meshed with a second driving wheel. The output end of the first sampling drive 1214 is connected to the first driven wheel 1216, so that the first driving wheel 1215 can be driven to rotate by the first sampling drive 1214, causing the second driving wheel to drive the first rotating shaft 1212 to rotate, so that the second rotating shaft 1213 rotates with the first rotating shaft 1212, thereby driving the sampling mechanism 11 to rotate.

[0063] Optionally, the first sampling drive 1214 can be any of a rotary motor, servo motor, or hydraulic motor, etc. The specific configuration can be set according to actual needs, and there are no restrictions here.

[0064] Optionally, the first driving gear 1215 and the first driven gear 1216 are spur gears.

[0065] As an alternative embodiment of the rotary drive assembly, the rotary drive assembly can also be directly connected to the first rotating shaft 1212 via the first sampling drive member 1214.

[0066] In some embodiments, the propulsion unit 122 includes a support box 1221, a push rod 1222, and a propulsion drive assembly. The propulsion drive assembly is installed inside the support box 1221. One end of the push rod 1222 is connected to the propulsion drive assembly, and the other end of the push rod 1222 extends out of the support box 1221 and is connected to the protective box 1211 of the rotating unit 121. The propulsion drive assembly is used to drive the push rod 1222 to move towards or away from the rock. By placing the propulsion drive assembly inside the support box 1221, the propulsion drive assembly can be protected, preventing contamination of the propulsion drive assembly by debris or dust impurities during the drilling process of the sampling mechanism 11 into the rock, which could affect the operation of the propulsion unit 122. Furthermore, for underwater core sampling scenarios, placing the propulsion drive assembly inside the protective box 1211 can also reduce the possibility of underwater organisms entanglement or obstruction of movement, thereby improving the operational reliability of the propulsion unit 122.

[0067] Optionally, the drive assembly includes a second sampling drive 1223, a threaded rod 1224, and a push plate 1225. Both ends of the threaded rod 1224 are rotatably connected to the inner wall of the support box 1221. The second sampling drive 1223 is directly or indirectly connected to the threaded rod 1224 and is used to drive the threaded rod 1224 to rotate. The end of the push rod 1222 away from the protective box 1211 is connected to the push plate 1225. The push plate 1225 has a threaded hole, through which the threaded rod 1224 passes and is threadedly connected. The length direction of the threaded rod 1224 is parallel to the length direction of the sampling cylinder 111 (i.e.,...). Figure 5 (x direction in the middle).

[0068] Thus, when the second sampling drive 1223 is started, it drives the threaded rod 1224 to rotate. The push plate 1225 moves along the length of the threaded rod 1224 under the drive of the threaded rod 1224, so as to drive the push rod 1222 to move along the length of the threaded rod 1224. The rotating unit 121 moves towards or away from the rock under the drive of the push rod 1222, and drives the sampling mechanism 11 to move relative to the rock, so as to realize the drilling of the rock or the leaving of the rock after the sampling is completed.

[0069] Optionally, the drive assembly further includes a guide rod 1226, with both ends of the guide rod 1226 fixedly connected to the inner wall of the support box 1221. The push plate 1225 is provided with a guide through hole, and the guide rod 1226 is movably inserted through the guide through hole. This allows the push plate 1225 to be guided as it moves along the length of the threaded rod 1224, improving the stability of the movement of the push plate 1225 and the push rod 1222, and limiting the movement of the push plate 1225. This prevents the push plate 1225 from rotating relative to the threaded rod 1224 under its drive, thereby improving the reliability of the drive unit 122.

[0070] Optionally, the drive assembly further includes a first bevel gear and a second bevel gear. The axes of the first and second bevel gears are perpendicular and mesh with each other. The output end of the second sampling drive 1223 is connected to the first bevel gear, and the second bevel gear is sleeved on the outer periphery of the threaded rod 1224. The second sampling drive 1223 drives the first bevel gear to rotate, thereby driving the second bevel gear to rotate. The second bevel gear drives the threaded rod 1224 to rotate, thereby driving the push plate 1225 and the push rod 1222 to move along the length of the threaded rod 1224.

[0071] Optionally, the threaded rod 1224 includes a threaded section and a smooth section. The smooth section is connected to the threaded section, and the second bevel gear is sleeved on the outer circumference of the smooth section. The threaded section has external threads and is threadedly connected to the threaded hole of the push plate 1225. This improves the reliability of the connection between the second bevel gear and the threaded rod 1224.

[0072] In some embodiments, the core sampling device 1 further includes a fixing mechanism 14, to which the support box 1221 is fixedly connected. The fixing mechanism 14 is used for detachable connection with mechanical equipment to move the core sampling device 1 to the target sampling location or to the sample collection location, so as to facilitate the disassembly of the core sampling device 1 and the extraction and storage of core samples. The mechanical equipment may include, but is not limited to, underwater robots, submarines, detectors, cranes, etc.

[0073] To facilitate reading and understanding, the working process of core sampling device 1 is illustrated below with an example:

[0074] During core sampling, the sampling cylinder 111 is driven to rotate by the rotating unit 121, which in turn drives the drill bit 112 to rotate. After the sampling cylinder 111 and the drill bit 112 rotate stably, the pushing unit 122 is driven to drive the rotating unit 121 to move closer to the rock. When the rotating unit 121 moves, it drives the sampling cylinder 111 and the drill bit 112 to move synchronously, so that the drill bit 112 moves towards the rock while rotating, thereby realizing that the drill bit 112 drills into the rock. During the process of the drill bit 112 and the sampling cylinder 111 drilling into the rock, the core enters the sampling space 1111 in sequence through the sampling through hole 1121 and the sampling port. When the sampling tube 111 penetrates the rock to the target depth, the core sample volume in the sampling space 1111 reaches the target amount. The cutting mechanism 13 is then activated. The cutting drive 133 first drives the first cutting assembly 131 to move closer to the sampling space 1111 (i.e., the core). At this time, the transmission assembly 134 moves under the drive of the first cutting assembly 131, driving the second cutting assembly 132 to move closer to the sampling space 1111, so that the first cutting assembly 131 and the second cutting assembly 132 can simultaneously cut the core, thereby improving the core cutting efficiency. After the first cutter 1312 and the second cutter 1322 cut the core, the cutting drive 133 stops working. The core sampling device 1 is then moved to the sample collection position by mechanical equipment to remove and store the core sample from the sampling space 1111.

[0075] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A core sampling device, characterized in that, include: A sampling mechanism, comprising a sampling tube, the sampling tube having a sampling space, a sampling inlet and a cutting hole, the sampling inlet being located at the bottom of the sampling tube and communicating with the sampling space, and the cutting hole communicating with the sampling space and being spaced apart from the sampling inlet; A driving mechanism is provided to drive the sampling cylinder to drill into the rock, and the sampling port is provided to allow the rock core to enter the sampling space. A cutting mechanism, which is movably inserted through the cutting hole, is used to cut the rock core located in the sampling space.

2. The core sampling device according to claim 1, characterized in that, The sampling tube is provided with an installation cavity, the sampling space is located at the center of the sampling tube, the installation cavity is connected to the sampling space through the cutting hole, and the cutting mechanism is installed in the installation cavity.

3. The core sampling device according to claim 2, characterized in that, The mounting cavity includes a first chamber and a second chamber, which are interconnected at the end of the sampling tube furthest from the inlet. The cutting hole connects the first chamber and the second chamber respectively. The cutting mechanism includes a first cutting component, a second cutting component, a cutting drive component, and a transmission component. The first cutting component is installed in the first chamber, and the second cutting component is installed in the second chamber. The cutting drive component is connected to the first cutting component, and the first cutting component and the second cutting component are respectively drivenly connected to the transmission component. The transmission component is used to drive the first cutting component and the second cutting component to move simultaneously.

4. The core sampling device according to claim 3, characterized in that, The first cutting component and the second cutting component are arranged symmetrically along the center of the sampling space.

5. The core sampling device according to claim 3, characterized in that, The first cutting assembly includes a first support rod and a first cutter, and the second cutting assembly includes a second support rod and a second cutter. The first support rod and the second support rod extend along the length of the sampling cylinder. The first cutter and the second cutter are located at the end of the sampling cylinder near the inlet. One end of the first cutter is connected to the first support rod and extends towards the sampling space. One end of the second cutter is connected to the second support rod and extends towards the sampling space. The transmission assembly is connected to the end of the first support rod and the second support rod away from the inlet. The cutting drive is installed inside the sampling cylinder and connected to the first support rod. The cutting drive is used to drive the first support rod to move towards or away from the sampling space.

6. The core sampling device according to claim 5, characterized in that, The transmission assembly includes a first rack, a second rack, and a transmission gear. The transmission gear is rotatably connected to the inner wall of the sampling cylinder. The first rack is connected to the first support rod and extends along the direction of movement of the first support rod. The second rack is connected to the second support rod and extends along the direction of movement of the second support rod. The first rack and the second rack are spaced apart along the length of the sampling cylinder and are respectively located on both sides of the transmission gear. The first rack and the second rack are respectively meshed with the transmission gear.

7. The core sampling device according to claim 5, characterized in that, The cutting mechanism further includes two sets of guide components. Each guide component includes a first guide rod and a second guide rod. The first guide rod and the second guide rod are spaced apart along the length direction of the sampling cylinder and fixedly connected to the inner wall of the sampling cylinder. In one set of guide components, the first guide rod and the second guide rod extend along the movement direction of the first support rod and are slidably connected to the first support rod. In the other set of guide components, the first guide rod and the second guide rod extend along the movement direction of the second support rod and are slidably connected to the second support rod.

8. The core sampling device according to any one of claims 1-7, characterized in that, The sampling mechanism also includes a drill bit, which is disposed at the bottom of the sampling tube. The center of the drill bit has a sampling through hole, which extends through both sides of the drill bit along the length of the sampling tube and is connected to the sampling inlet.

9. The core sampling device according to claim 8, characterized in that, The drill bit includes a first end and a second end. The first end is connected to the sampling cylinder, and the diameter of the sampling through hole gradually increases from the first end to the second end.

10. The core sampling device according to any one of claims 1-7, characterized in that, The driving mechanism includes a rotating unit and a pushing unit. The output end of the rotating unit is connected to the sampling cylinder, and the output end of the pushing unit is connected to the rotating unit. The pushing unit is used to drive the sampling cylinder to move towards the rock after the sampling cylinder has rotated stably.

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