Hard Rock Exploration Sampling Device

Abstract

The present invention discloses a hard rock exploration sampling device, including: an inner tube, a driving rod, a clamping assembly and a triggering assembly. A first chamber is provided at the top of the inner tube, and a second chamber and a third chamber are provided near the bottom. A clamping assembly is provided in the second chamber, and channels are formed in the wall of the third chamber, and cutting knives are sleeved in the channels. A sliding plate slides inside the inner tube, and the sliding plate slides into the inner tube through the entry of the sample. A sleeve for communicating the first chamber and the second chamber is provided inside the wall of the inner tube; the driving rod is slidably sleeved in the sleeve. The clamping assembly includes: a lead screw assembly and clamping claws. The lead screw assembly is horizontally arranged in the second chamber; the clamping claws are arranged on the lead screw slider of the lead screw assembly. The sliding plate moves to squeeze the triggering assembly, and the triggering assembly drives the driving rod to slide, causing the lead screw to rotate, so that the clamping claws enter the inner tube to clamp and fix the core, greatly avoiding the core falling off caused by the outer tube withdrawing from the drilling.

Description

Technical Field

[0001] The present invention relates to the technical field of rock geochemistry, and specifically to a sampling device for hard rock layer exploration. Background Art

[0002] Hard rock layer exploration refers to the process of exploring and studying rock layers with relatively high hardness in geological structures. This exploration is of great significance for understanding the geological structure of rock layers. There is currently a method that can obtain rock layer samples by drilling holes, analyze their physical and chemical properties. The drilling device generally includes a sampling tube, a drill bit, and a handheld driving part. The driving part generally includes a driving motor and a handheld bracket. The driving motor is connected to one end of the sampling tube, and one end of the sampling tube is connected to the drill bit. The drill bit on the sampling tube is driven by the driving part to drill, so as to obtain the core.

[0003] However, after the existing sampling tube drills into the rock layer for sampling, due to the problem of insufficient stability in handheld drilling, when the sampling tube rotates and withdraws, the core sample in the sampling tube is easily affected by the rotational vibration of the sampling tube, and thus is likely to slide out of the sampling tube, resulting in insufficient integrity of the sampled core sample. Summary of the Invention

[0004] The purpose of the present invention is to provide a sampling device for hard rock layer exploration, which can ensure the integrity of the core sample in the sampling tube.

[0005] The technical solution of the present invention is as follows:

[0006] A hard rock formation exploration sampling device, comprising: an outer tube and a driving part for driving the outer tube to rotate and drill. A drill bit is provided at the drilling end of the outer tube. The device further includes: an inner tube sleeved and connected inside the outer tube. A first chamber is provided at the top of the inner tube, and a second chamber and a third chamber are provided near the bottom position. A notch communicating with the inside of the inner tube is opened in the second chamber, and a channel communicating with the inside of the inner tube is opened in the third chamber. A cutting knife is sleeved in the channel. A slide plate sliding along its length direction is slidably arranged inside the inner tube. A sleeve is provided inside the wall of the inner tube for communicating the first chamber and the second chamber. A driving rod is slidably sleeved in the sleeve, with a driven slider provided at the top. The driven slider is configured with an inclined surface. One end of the driving rod located in the second chamber is configured with a rack, and one end located in the third chamber is configured with an inclined block. A clamping assembly is located in the second chamber, including: a lead screw assembly horizontally arranged in the second chamber. A gear meshing with the rack is sleeved on the lead screw. A clamping claw is provided on the lead screw slider of the lead screw assembly. A triggering assembly includes: a triggering rod vertically penetrating the bottom plate of the first chamber. A triggering head, which is a conical platform structure, is connected to one end of the triggering rod located in the first chamber. A transmission slider, which is a conical platform structure, slides on the top of the first chamber, between the driven slider and the triggering head. The transmission slider slides upward through the triggering head and squeezes the driven slider downward, so that the driving rod slides downward, causing the rack to drive the gear to rotate, enabling the clamping claw to extend into the inner tube through the notch to clamp the core. At the same time, the inclined block squeezes the cutting knife to enter the inner tube through the channel to cut off the core.

[0007] Further, a second spring is provided between the driven slider of the driving rod and the sleeve, and a first spring is provided on the triggering rod between the triggering head and the bottom plate of the first chamber. The sampling device further includes: a clamping and engaging assembly, which includes a clamping head and a clamping groove. The clamping head is provided at the top of the triggering head, and the clamping groove is opened at the top of the first chamber. The clamping head is engaged with the clamping groove through the upward extrusion of the triggering head. When the triggering head is upwardly extruded to make the driving rod slide downward to clamp the core, the second spring is extruded and the first spring is stretched. The clamping head enters the clamping groove to keep the triggering head in a fixed position, so as to ensure that when the outer tube withdraws, the clamping claw continuously clamps the core. After the outer tube completely withdraws from the drill hole and the obtained core is taken out, the clamping head is released. At this time, the slide plate loses the acting force of the core jacking up, and the first spring contracts and resets, and the second spring bounces and resets, so that the triggering head, the slide plate and the driving rod are reset. When the slide plate is reset, it pushes the core to move outward. While the driving rod is reset, the rack drives the lead screw assembly to drive the clamping claw to start moving away from the core, thereby releasing the core. If the rock sample is still difficult to be taken out smoothly, the outer tube can be hammered with a rubber hammer to make the core fall off from the inner tube.

[0008] Further, to facilitate the disassembly of the inner tube for maintenance, a section of the inner tube near the bottom is threadedly connected to a section of the outer tube near the bottom. Above the inner tube top plate, there is a handle in the shape of a tube structure, and a plurality of hole grooves are provided on the circumferential side of the handle.

[0009] Further, the clamping assembly further includes a bearing plate, which is connected to the lead screw slider. The clamping assembly is configured with two clamping claws, and the two clamping claws are arranged at different heights on the bearing plate. By means of the two clamping claws arranged at different heights, when the core at the bottom breaks, the two sections of the core can be fixed respectively, achieving a better clamping effect. A notch is opened in the second chamber corresponding to the position of the other clamping claw, and each notch is provided with two baffle plates. The two baffle plates are respectively connected to the top and bottom of the notch, and the middle is for the clamping claw to pass through. The baffle plates are used to block rock particles from entering the second chamber.

[0010] Further, a plurality of sliding grooves are opened along the length direction on the inner wall of the inner tube. The sliding plate is disc-shaped, and a plurality of embedding grooves are opened on the circumferential side of the sliding plate. A ball is rotatably arranged in each embedding groove, and the ball slides in the sliding groove.

[0011] Further, the channel is inclined, and the end of the channel close to the inner tube is lower. The end of the cutting knife away from the inner tube is configured as an inclined surface structure, and the inclined surface structure matches the inclined surface of the inclined block. By the inclined setting of the channel, the feeding direction of the cutting knife is inclined downward, and the initial position of the cutting knife is at a certain distance from the outlet position of the channel, leaving time for the core to enter. So that after the triggering component is triggered for a period of time, the cutting head of the cutting knife can act on the core, avoiding leaving large damage marks on the side of the core due to the premature contact of the cutting head with the core and damaging the integrity of the core.

[0012] Further, a slide rail is provided on the inclined surface of the inclined block, and the slide rail is arranged along the inclined direction of the inclined surface of the inclined block. A sliding sleeve is provided on the inclined block structure of the cutting knife, and the sliding sleeve is sleeved and slides on the slide rail. Through the cooperation relationship between the sliding sleeve and the slide rail, the cutting knife and the inclined block are slidably matched. When the driving rod returns to its original position, the cooperation between the sliding sleeve and the slide rail pulls the cutting knife back to its initial position.

[0013] Further, in order to be able to drive more cutting knives simultaneously, the sampling device further includes: an annular disc, with round holes opened on the annular disc. The driving rod passes through the round holes and is connected to the annular disc, so that the annular disc moves up and down following the driving rod. In the third chamber, a plurality of channels are arranged with the central axis of the inner tube as the axis. A cutting knife is arranged in each channel, and a plurality of tool driving rods are arranged on the bottom surface of the annular disc corresponding to the positions of the channels. An inclined block is configured on each tool driving rod. By the downward movement of the driving rod, a plurality of cutting knives cut towards the core from multiple different directions.

[0014] Furthermore, a plurality of sleeves are provided at the bottom of the third chamber corresponding to the positions of the driving rod and each cutter driving rod. A third spring is sleeved in each sleeve. The sleeve can not only keep the sliding direction of the cutter driving rod vertical, but also reset the cutter driving rod through the third spring.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. In the present invention, a detachable inner tube is arranged inside the outer tube of the sampling device. A sliding plate is slidably arranged in the inner tube. The sliding plate is driven to slide along the length direction of the inner tube by the entry of the rock sample. A triggering assembly is arranged at the top of the inner tube, and a clamping assembly and a separating assembly are arranged at the bottom of the inner tube. A driving rod is arranged between the clamping assembly, the separating assembly and the triggering assembly. After the length of the sampled core reaches the set length, the sliding plate just squeezes the triggering assembly. At this time, the driving rod is driven by the triggering assembly, and the clamping assembly is driven by the driving rod so that the clamping claws tightly hold the core sample, ensuring the stability of the lowest position of the core sample inside the inner tube, thereby preventing the entire core sample from falling off and breaking out of the inner tube when the outer tube is withdrawn from the drilling well, thus ensuring the integrity of the sampled core sample. Moreover, when the driving rod of the present invention drives the clamping assembly, it can also drive the separating assembly to separate the sample from the mother rock, avoiding the problem that the sampled sample is unqualified and has poor integrity due to the last section of the sample and the mother rock not being separated when the outer tube is withdrawn from the drilling well.

[0017] 2. A clamping assembly is arranged at the top of the inner tube of the present invention. When the trigger head is squeezed upward and the driving rod slides downward to clamp the core, the second spring is squeezed and the first spring is stretched. The clamping head enters the clamping groove to keep the trigger head in a fixed position, thereby ensuring that the clamping claws continuously clamp the core when the outer tube is withdrawn, further ensuring the stability of the core sample inside the inner tube. After the outer tube is completely withdrawn from the drilling well and the obtained core needs to be taken out, the clamping head is released. At this time, the sliding plate loses the acting force of the core jacking, and the first spring contracts and resets, and the second spring bounces and resets, so that the trigger head, the sliding plate and the driving rod are reset. When the sliding plate is reset, it pushes the core to move outward. At the same time when the sliding plate is reset, the driving rod is reset to drive the rack to drive the lead screw assembly to drive the clamping claws to start moving away from the core, thereby releasing the core. The sampling device of the present invention not only ensures the stability of the sampling sample inside the inner tube during the process of the outer tube being withdrawn from the drilling well, but also when the sample needs to be taken out, through the reset of the sliding plate and the driving rod, the sample inside the tube is pushed out by the sliding plate, which is not only more convenient to operate, but also can avoid sample damage caused by taking out the sample from the sampling tube.

[0018] 3. In the present invention, the channel is inclined, such that the feed direction of the cutting tool is inclined downward, and the initial position of the cutting tool is at a certain distance from the outlet position of the channel. After the triggering component is triggered for a period of time, the tool tip of the cutting tool can act on the core, avoiding leaving large damage marks on the side of the core due to the premature contact of the tool tip with the core and damaging the integrity of the core. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of the external structure schematic diagram of the present invention.

[0020] Figure 2 It is the front view of the internal structure schematic diagram of the present invention.

[0021] Figure 3 It is the top view of the sliding relationship between the slide plate and the sliding groove of the present invention.

[0022] Figure 4 It is the top view of the clamping component and the notch structure schematic diagram of the present invention.

[0023] Figure 5 It is the top view of the tool driving rod, the channel and the cutting tool structure schematic diagram of the present invention.

[0024] Figure 6 It is the top view of the annular disc and the driving rod structure schematic diagram of the present invention.

[0025] Figure 7 is Figure 2 the enlarged view of the structure schematic diagram of area A in

[0026] Figure 8 is Figure 2 the enlarged view of the structure schematic diagram of area B in

[0027] Figure 9 is Figure 2 the enlarged view of the structure schematic diagram of area C in

[0028] Among them, 1. outer tube, 2. inner tube, 21. first chamber, 22. second chamber, 221. notch, 222. baffle, 23. third chamber, 231. channel, 24. sliding groove, 25. handle, 4. trigger assembly, 41. trigger rod, 411. first spring, 42. trigger head, 43. driving slider, 431. driving slider slide rail, 44. driven slider, 5. sliding plate, 51. ball, 6. driving rod, 61. sleeve, 62. second spring, 63. rack, 7. engaging assembly, 71. chuck, 72. clamping groove, 8. clamping assembly, 81. bearing plate, 82. clamping jaw, 83. lead screw slider, 84. lead screw, 85. gear, 86. guide rod, 9. separating assembly, 91. cutting tool, 92. tool driving rod, 93. inclined block, 94. sleeve, 95. third spring, 96. annular disc. Detailed implementation manners

[0029] The following Figures 1 to 9 is combined with the accompanying drawings to describe in detail the specific implementation manners of the present invention. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and 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 should not be construed as a limitation to the present invention.

[0030] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features; in the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0031] It should be noted that the connection between the outer tube involved in the present invention and the driving part for driving the outer tube to drill is adopted in a conventional connection manner, and the driving part is a commercially available product and does not involve any innovation.

[0032] Embodiment

[0033] As Figure 1 shown, a hard rock exploration and sampling device includes: an outer tube 1 and a driving part for driving the outer tube 1 to rotate and drill. A drill bit is provided at the drilling end of the outer tube 1. As Figure 2As shown, the sampling device further includes: an inner tube 2, a driving rod 6, a clamping assembly 8, and a triggering assembly 4. The inner tube 2 is sleeved and connected inside the outer tube 1 and drills together with the outer tube 1. There is a channel in the middle of the drill bit for the rock formation structure to enter the inner tube. In this embodiment, the drill bit is a conical structure, and the outer diameter of the drill bit is slightly smaller than the outer diameter of the outer tube 1 to facilitate the discharge of rock cuttings. A first chamber 21 is provided at the top of the inner tube 2, and a second chamber 22 and a third chamber 23 are provided near the bottom position. Both the second chamber 22 and the third chamber 23 are annular chambers, and the position of the second chamber 22 is above the third chamber 23. The third chamber 23 is above the drill bit. A plurality of notches 221 communicating with the inside of the inner tube 2 are formed along the wall of the second chamber 22, and a plurality of channels 231 communicating with the inside of the inner tube 2 are formed on the wall of the third chamber 23. A cutting tool 91 is sleeved in each channel 231, as Figure 2 As shown, a sliding plate 5 that slides along its length direction is slidably arranged inside the inner tube 2. As the outer tube 1 drills, the structure of the rock formation enters the inner tube 2, and as the outer tube 1 continuously drills, the rock formation structure entering the inner tube 2 continuously pushes up the sliding plate 5, causing the sliding plate 5 to slide towards the top end of the inner tube 2. A plurality of sleeves 61 are provided inside the wall of the inner tube 2. The plurality of sleeves 61 are arranged in a circular array with the central axis of the inner tube 2 as the axis. Each sleeve 61 is used to communicate the first chamber 21 and the second chamber 22; a plurality of driving rods 6 are respectively slidably sleeved in the corresponding sleeves 61, and the sleeves 61 are used to enable the driving rods 6 to slide stably up and down, as Figure 2 As shown, a driven slider 44 is provided at the top of each driving rod 6, and a slope is arranged on the side of the driven slider 44 close to the rock formation structure, as Figure 2 、 Figure 8 and Figure 9 As shown, at one end of each driving rod 6 located in the second chamber 22, a rack 63 is arranged, and at one end located in the third chamber 23, an inclined block 93 is arranged; the clamping assembly 8 is located in the second chamber 22 and is used to clamp and fix the drilled core after the sampled core reaches the set size to prevent the core from slipping out of the tube body when the outer tube 1 withdraws from the drilling. The number of the clamping assemblies 8 corresponds to that of the driving rods 6, as Figure 2 and and Figure 8 As shown, each clamping assembly 8 includes: a lead screw assembly and a clamping jaw 82. The lead screw assembly is horizontally arranged in the second chamber 22. A gear 85 meshing with the rack 63 is sleeved on the lead screw 84. It should be noted that the lead screw assembly is a commercially available product and has a lead screw 84, a lead screw slider 83, and a guide rod 86, which will not be elaborated here; the clamping jaw 82 is arranged on the lead screw slider 83 of the lead screw assembly. The driving rod 6 slides up and down to enable the rack 63 to drive the gear 85 to rotate, thereby causing the lead screw 84 to rotate, enabling the lead screw slider 83 to slide along the guide rod 86, so that the clamping jaw 82 enters the inner tube 2 from the notch 221 to clamp the core; as Figure 2 and Figure 7As shown in the figure, the triggering assembly 4 includes a triggering rod 41, a triggering head 42, and a transmission slider 43. The triggering rod 41 vertically penetrates the bottom plate of the first chamber 21 and can slide vertically up and down. The triggering head 42 has a frustum of a cone structure and is connected to one end of the triggering rod 41 located in the first chamber 21. The transmission slider 43 has a frustum of a cone structure and slides on the top of the first chamber 21, located between the driven slider 44 and the triggering head 42. The transmission slider 43 slides upward through the triggering head 42 and presses the driven slider 44 downward, so that the driving rod 6 slides downward, so that the rack 63 drives the gear 85 to rotate, so that the clamping claws 82 extend into the inner tube 2 from the notch 221 to clamp the core. At the same time, the inclined block 93 presses the cutting knife 91 to enter the inner tube 2 from the channel 231 to cut the core. In order to reduce the frictional force between the triggering head 42, the transmission slider 43, and the driven slider 44, rolling steel balls are embedded on the inclined surfaces where the transmission slider 43 contacts the triggering head 42 and the driven slider 44. Through the rolling of the steel balls on the inclined surface, the triggering response speed between the transmission slider 43 and the triggering head 42 and the driven slider 44 is improved. And a transmission slider slide rail 431 is provided on the top of the first chamber 21. The transmission slider slide rail 431 can not only provide a fixed sliding route for the transmission slider 43, but also make the transmission slider 43 suspended through the height of the transmission slider slide rail 431 to leave enough rising space for the triggering head 42. In this embodiment, 4 clamping claws 82, 4 driving rods 6, and 4 transmission sliders 43 are selected. When the obtained rock formation samples continuously enter the inner tube 2, the sliding plate 5 is lifted up to press the triggering rod 41 upward, so that the triggering head 42 moves upward, thereby squeezing the four transmission sliders 43 located on its periphery. The four transmission sliders 43 slide along their respective corresponding transmission slider slide rails 431 and press the corresponding driven sliders 44, so that the four driving rods 6 move downward synchronously. The rack 63 on each driving rod 6 drives the corresponding lead screw assembly through the gear 85, so that the four clamping claws 82 approach the core synchronously from four directions. Through the clamping and fixing in four directions, the clamping and fixing effect on the core is improved, and the core falling off caused by the outer tube 1 withdrawing from the drilling is greatly avoided.

[0034] As Figure 2 and Figure 7 shown in the figure, the sampling device further includes a clamping component 7. The clamping component 7 includes a clamping head 71 and a clamping groove 72. The clamping head 71 is arranged on the top of the triggering head 42, and the clamping groove 72 is opened on the top of the first chamber 21. It should be noted that the clamping component 7 can be a commercially available product, as long as it can make the clamping head 71 cooperate with the clamping groove 72 through the rising of the triggering head 42 and can release the clamping head 71 from the top of the inner tube 2 to reset the first spring 411 and the second spring 62.

[0035] In some embodiments, as Figure 2 and Figure 7As shown, a second spring 62 is provided between the driven slider 44 of the driving rod 6 and the sleeve 61, and a first spring 411 is provided on the trigger rod 41 between the trigger head 42 and the bottom plate of the first chamber 21. When the trigger head 42 is pressed upward to cause the driving rod 6 to slide downward to clamp the core, the second spring 62 is compressed and the first spring 411 is stretched. The chuck 71 enters the card slot 72 to keep the trigger head 42 in a fixed position, so as to ensure that when the outer tube 1 is withdrawn, the clamping claws 82 continuously clamp the core. After the outer tube 1 is completely withdrawn from the drilling, when the obtained core is taken out, the chuck 71 is released. At this time, the sliding plate 5 loses the acting force of the core jacking, and the first spring 411 contracts and resets, and the second spring 62 pops up and resets, so that the trigger head 42, the sliding plate 5 and the driving rod 6 are reset. When the sliding plate 5 is reset, it pushes the core to move outward. While the driving rod 6 is reset, the rack 63 drives the lead screw assembly to drive the clamping claws 82 to start moving away from the core, thereby releasing the core. If the rock sample is still difficult to take out smoothly, the outer tube 1 can be hammered with a rubber hammer to make the core fall off from the inner tube 2.

[0036] In some embodiments, in order to facilitate the disassembly of the inner tube 2 and overhaul the inner tube 2, a section near the bottom end of the inner tube 2 is threadedly connected to a section near the bottom end of the outer tube 1. Above the top plate of the inner tube 2, there is a handle 25 in the shape of a tube. A plurality of holes are provided on the periphery of the handle 25. Hold the handle 25 with the fingers buckled in the holes to facilitate the rotation of the inner tube 2.

[0037] In the embodiment as Figure 8 shown, the clamping assembly 8 further includes a bearing plate 81. The bearing plate 81 is vertically arranged and has an opening in the middle. It is connected to the lead screw slider 83 through the opening. The clamping assembly 8 is configured with two clamping claws 82. The two clamping claws 82 are arranged at different heights on the bearing plate 81. A notch 221 is opened at the position corresponding to the other clamping claw 82 in the second chamber 22. With the two clamping claws 82 arranged at different heights, when the core at the bottom end is broken, the two sections of the core can be fixed respectively, achieving a better clamping effect. As Figure 8 shown, as Figure 4 and Figure 8 shown, a baffle 222 is provided in each notch 221. The baffle 222 is a rubber plate, and each notch 221 is configured with two baffles 222. The two baffles 222 are respectively connected to the top and bottom of the notch 221, and the middle is for the clamping claw 82 to pass through. The baffle 222 is used to block rock particles from entering the second chamber 22.

[0038] As Figure 2 and Figure 3 shown, a plurality of sliding grooves 24 are opened along the length direction on the inner wall of the inner tube 2. The sliding plate 5 is disc-shaped, and a plurality of embedding grooves are opened on the periphery of the sliding plate 5. A ball 51 is rotatably arranged in each embedding groove, and the ball 51 slides in the sliding groove 24.

[0039] In the embodiment shown as Figure 9 below, each channel 231 is inclined, and the end of the channel 231 close to the inner tube 2 is lower. The end of the cutting tool 91 away from the inner tube 2 is configured as an inclined surface structure, which matches the inclined surface of the inclined block 93. When the driving rod 6 moves downward, the cutting tool 91 is extruded by the inclined block 93 to feed towards the core. As Figure 9 shown, by arranging the channel 231 inclinedly, the feeding direction of the cutting tool 91 is inclined downward, and there is a distance between the initial position of the cutting tool 91 and the outlet position of the channel 231, leaving time for the core to enter. So that after a period of time after the triggering assembly 4 is triggered, the cutting head of the cutting tool 91 can act on the core, avoiding large damage marks left on the side of the core due to the cutting head contacting the core too early and damaging the integrity of the core. The separation assembly 9 of this embodiment can be used alone or in combination with the existing technology of vibrating the core to separate the core from the mother rock. And the multiple cutting tools 91 of this embodiment cut towards the core from multiple directions, leaving incisions at multiple points on the circumference of the core, providing separation points for core vibration breaking. This not only makes it easier for the core to separate from the mother rock, but also causes less damage to the separated cross-section and better guarantees the integrity of the core sample.

[0040] As Figure 9 shown, a slide rail is provided on the inclined surface of the inclined block 93, and the slide rail is arranged along the inclined direction of the inclined surface of the inclined block 93. A sliding sleeve is provided on the inclined block structure of the cutting tool 91, and the sliding sleeve is sleeved and slides on the slide rail. Through the cooperation relationship between the sliding sleeve and the slide rail, the cutting tool 91 and the inclined block 93 are slidably matched. When the driving rod 6 is reset, the cooperation between the sliding sleeve and the slide rail pulls the cutting tool 91 back to the initial position.

[0041] In some embodiments, as Figure 5 、 Figure 6 and Figure 9 shown, in order to be able to arrange more cutting tools 91, the sampling device further includes: an annular disc 96, a circular hole is opened on the annular disc 96, the driving rod 6 passes through the circular hole and is connected to the annular disc 96, so that the annular disc 96 moves up and down following the driving rod 6. In the third chamber 23, multiple channels 231 are arranged with the central axis of the inner tube 2 as the axis. A cutting tool 91 is arranged in each channel 231, and multiple tool driving rods 92 are arranged at positions corresponding to the channels 231 on the bottom surface of the annular disc 96. An inclined block 93 is configured on each tool driving rod 92. By the downward movement of the driving rod 6, the multiple cutting tools 91 cut towards the core from multiple different directions.

[0042] As Figure 9As shown, a plurality of sleeves 94 are provided at the bottom of the third chamber 23 corresponding to the positions of the driving rod 6 and each cutter driving rod 92. A third spring 95 is sleeved in each sleeve 94. The sleeve 94 can not only keep the sliding direction of the cutter driving rod 92 vertical, but also reset the cutter driving rod 92 through the third spring 95.

[0043] The above-disclosed are only several preferred specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A hard rock stratum exploration sampling device, comprising: An outer tube (1) and a driving unit for driving the outer tube (1) to rotate and drill, wherein a drill bit is provided at the drilling end of the outer tube (1), and the outer tube (1) is characterized in that it also comprises: An inner tube (2) is sleeved and connected inside the outer tube (1); a first chamber (21) is provided at the top of the inner tube (2); a second chamber (22) and a third chamber (23) are provided near the bottom; the second chamber (22) is provided with a notch (221) connected to the inside of the inner tube (2); the third chamber (23) is provided with a channel (231) connected to the inside of the inner tube (2); a cutting knife (91) is sleeved inside the channel (231); a slide plate (5) is slidably arranged inside the inner tube (2) and slides along its length direction; a sleeve (61) is provided inside the wall of the inner tube (2); the sleeve (61) is used to connect the first chamber (21) and the second chamber (22); A driving rod (6) is slidably sleeved in the sleeve (61), a driven slider (44) is provided on the top, the driven slider (44) is provided with an inclined surface, one end of the driving rod (6) located in the second chamber (22) is provided with a rack (63), and one end of the driving rod (6) located in the third chamber (23) is provided with an inclined block (93); The clamping assembly (8) is located in the second chamber (22), and comprises: a screw assembly horizontally arranged in the second chamber (22), a screw (84) sleeved with a gear (85) meshing with the rack (63); a clamping claw (82) arranged on a screw slider (83) of the screw assembly; The trigger assembly (4) comprises: a trigger rod (41) vertically penetrating the bottom plate of the first chamber (21); a trigger head (42) having a conical platform structure and connected to one end of the trigger rod (41) located in the first chamber (21); a transmission slider (43) having a conical platform structure and sliding on the top of the first chamber (21) and located between the driven slider (44) and the trigger head (42); the transmission slider (43) is lifted and slid by the trigger head (42) and presses the driven slider (44) downward to make the driving rod (6) slide downward, so that the rack (63) drives the gear (85) to rotate, so that the clamping claw (82) extends from the notch (221) into the inner tube (2) to clamp the rock core, and at the same time, the inclined block (93) presses the cutting knife (91) from the channel (231) into the inner tube (2) to cut the rock core.

2. A hard rock formation exploration sampling device according to claim 1, characterized in that: A second spring (62) is provided between the driven slider (44) and the sleeve (61) of the driving rod (6), and a first spring (411) is provided on the trigger rod (41) between the trigger head (42) and the bottom plate of the first chamber (21).

3. A hard rock formation exploration sampling device according to claim 1, characterized in that: A section of the inner tube (2) close to the bottom end is connected to a section of the outer tube (1) close to the bottom end via a threaded connection. A handle (25) of a tubular structure is provided above the top plate of the inner tube (2). A plurality of holes and grooves are provided on the circumference of the handle (25).

4. A hard rock formation exploration sampling device according to claim 1, characterized in that: The invention also comprises: a clamping assembly (7), wherein the clamping assembly (7) comprises a clamping head (71) and a clamping slot (72), wherein the clamping head (71) is arranged on the top of the trigger head (42), and the clamping slot (72) is opened on the top of the first chamber (21), and the clamping head (71) is raised by the trigger head (42) to complete the engagement with the clamping slot (72).

5. The hard rock formation exploration sampling device according to claim 1, characterized in that: The clamping assembly (8) also includes a supporting plate (81), the supporting plate (81) is connected to the lead screw slider (83), the clamping assembly (8) is provided with two clamping claws (82), the two clamping claws (82) are arranged at different heights on the supporting plate (81), and the second chamber (22) is provided with a notch (221) corresponding to the position of another clamping claw (82).

6. A hard rock formation exploration sampling device according to claim 1, characterized in that: The inner wall of the inner tube (2) is provided with a plurality of slide grooves (24) along the length direction; the slide plate (5) is disc-shaped, and a plurality of inlay grooves are provided on the circumference of the slide plate (5); a ball (51) is rolled in each of the inlay grooves, and the ball (51) slides in the slide groove (24).

7. A hard rock formation exploration sampling device according to claim 1, characterized in that: The channel (231) is arranged at an angle, and the end of the channel (231) close to the inner tube (2) is lower, and the end of the cutting knife (91) away from the inner tube (2) is configured as a slope structure, and the slope structure matches the slope of the inclined block (93).

8. A hard rock formation exploration sampling device according to claim 7, characterized in that: A slide rail is provided on the inclined surface of the inclined block (93), and the slide rail is arranged along the inclination direction of the inclined surface of the inclined block (93). A sliding sleeve is provided on the inclined block structure of the cutting knife (91), and the sliding sleeve is sleeved and slides on the slide rail.

9. A hard rock formation exploration sampling device according to claim 8, characterized in that: Also includes: An annular disk (96) is provided with a circular hole, a driving rod (6) passes through the circular hole and is connected to the annular disk (96), so that the annular disk (96) moves up and down following the driving rod (6); in the third chamber (23), a plurality of channels (231) are arranged with the central axis of the inner tube (2) as the axis, a cutting knife (91) is arranged in each channel (231), and a plurality of tool driving rods (92) are arranged on the bottom surface of the annular disk (96) at positions corresponding to the channels (231), each tool driving rod (92) is provided with an inclined block (93), and the plurality of cutting knives (91) cut the core from a plurality of different directions by the downward movement of the driving rod (6).

10. A hard rock formation exploration sampling device according to claim 9, characterized in that: A plurality of sleeves (94) are provided at the bottom of the third chamber (23) at positions corresponding to the drive rod (6) and each tool drive rod (92), and a third spring (95) is sleeved in each sleeve (94).

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