Sampling device for hard rock stratum exploration

Abstract

The invention discloses a hard rock stratum exploration sampling device which comprises an inner pipe, a driving rod, a clamping assembly and a triggering assembly, a first cavity is formed in the top of the inner pipe, a second cavity and a third cavity are formed in the positions close to the bottom of the inner pipe, the clamping assembly is arranged in the second cavity, channels are formed in the cavity wall of the third cavity, and cutting knives are arranged in the channels in a sleeved mode; a sliding plate slides in the inner tube, the sliding plate slides towards the inner tube through sample entering, and a sleeve used for communicating the first cavity with the second cavity is arranged in the tube wall of the inner tube; the driving rod is slidably arranged in the sleeve in a sleeved mode, the clamping assembly comprises a lead screw assembly and a clamping claw, and the lead screw assembly is horizontally arranged in the second cavity; the clamping jaw is arranged on a lead screw sliding block of the lead screw assembly, the sliding plate moves to extrude the triggering assembly, the triggering assembly drives the driving rod to slide, the lead screw is made to rotate, the clamping jaw enters the inner pipe to clamp and fix a rock core, and the phenomenon that the rock core falls off when the outer pipe retreats from a drill is avoided to a great extent.

Description

Technical Field

[0001] The invention relates to the technical field of rock geochemistry, in particular to a hard rock stratum exploration and sampling device. Background Art

[0002] Hard rock formation exploration refers to the process of exploring and studying rock formations with higher hardness in geological structures. This kind of exploration is of great significance for understanding the geological structure of rock formations. There is currently a method of obtaining rock formation samples by drilling holes and analyzing their physical and chemical properties. The drilling device generally includes a sampling tube, a drill bit and a handheld drive unit. The drive unit generally includes a drive motor and a handheld bracket. The drive 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 drive unit to drill, thereby obtaining the core.

[0003] However, after the existing sampling tube is drilled into the rock formation to take samples, due to the lack of stability of handheld drilling, the core sample in the sampling tube is easily affected by the rotation vibration of the sampling tube when the sampling tube is rotated out, and is easy to slip 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 hard rock formation exploration sampling device, which can ensure the integrity of the core sample in the sampling tube.

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

[0006] A hard rock formation exploration and sampling device comprises: an outer tube and a driving part for driving the outer tube to rotate and drill, the drilling end of the outer tube is provided with a drill bit, and also comprises: an inner tube, which is sleeved and connected inside the outer tube, a first chamber is provided on the top of the inner tube, and a second chamber and a third chamber are provided near the bottom, the second chamber is provided with a notch connected to the inside of the inner tube, the third chamber is provided with a channel connected to the inside of the inner tube, 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 in the wall of the inner tube, and the sleeve is used to connect the first chamber and the second chamber; a driving rod, which is slidably sleeved in the sleeve, a driven slider is provided on the top, the driven slider is provided with an inclined surface, and a rack is provided at one end of the driving rod located in the second chamber , an inclined block is arranged at one end of the third chamber; a clamping assembly is located in the second chamber, including: a screw assembly, which is horizontally arranged in the second chamber, and a gear meshing with the rack is sleeved on the screw; a clamping claw is arranged on the screw slider of the screw assembly; a trigger assembly, including: a trigger rod, which vertically passes through the bottom plate of the first chamber; a trigger head, which is a conical table structure and is connected to one end of the trigger rod located in the first chamber; a transmission slider, which is a conical table structure, slides at the top of the first chamber and is located between the driven slider and the trigger head. The transmission slider is lifted and slid by the trigger head, and squeezes the driven slider downward to make the driving rod slide downward, so that the rack drives the gear to rotate, so that the clamping claw extends from the slot into the inner tube to clamp the core, and at the same time, the inclined block squeezes the cutting knife from the channel into the inner tube to cut off the core.

[0007] Furthermore, a second spring is provided between the driven slider and the sleeve of the driving rod, and a first spring is provided on the trigger rod between the trigger head and the bottom plate of the first chamber. The sampling device also includes: a clamping assembly, which includes a clamping head and a clamping slot. The clamping head is arranged on the top of the trigger head, and the clamping slot is opened on the top of the first chamber. The clamping head is raised by the trigger head and matched with the clamping slot. When the trigger head is squeezed upward to make the driving rod slide downward to clamp the core, the second spring is squeezed, the first spring is stretched, and the clamping head enters the clamping slot to keep the trigger head in a fixed position, thereby ensuring that the clamping claw continues to clamp the core when the outer tube is withdrawn. After the outer tube is completely withdrawn from the drilling, the clamping head is released when the obtained core is taken out. At this time, the slide plate loses the force of lifting the core, and the first spring contracts and resets, and the second spring rebounds and resets, so that the trigger head, the slide plate and the driving rod are reset, and when the slide plate is reset, the core is pushed outward. At the same time as the driving rod is reset, the rack drives the screw assembly to drive the clamping claw to start to move 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] Furthermore, in order to facilitate the disassembly and maintenance of the inner tube, a section of the inner tube near the bottom end is connected to a section of the outer tube near the bottom end by a threaded connection, a handle of a tubular structure is provided above the top plate of the inner tube, and a plurality of holes and grooves are provided on the circumference of the handle.

[0009] Furthermore, the clamping assembly also includes a bearing plate, the bearing plate is connected to the lead screw slider, the clamping assembly is equipped with two clamping claws, the two clamping claws are arranged at different heights on the bearing plate, and the two clamping claws arranged at different heights can fix the two cores separately when the core at the bottom is broken, so as to achieve a better clamping effect, and the second chamber is provided with a slot corresponding to the position of another clamping claw, and each slot is equipped with two baffles. The two baffles are respectively connected to the top and bottom of the slot, and the middle is used for the clamping claw to pass through, and the baffle is used to prevent rock particles from entering the second chamber.

[0010] Furthermore, the inner wall of the inner tube is provided with a plurality of slide grooves along the length direction, the slide plate is disc-shaped, and a plurality of inlay grooves are provided on the circumference of the slide plate, a ball is rolled in each of the inlay grooves, and the ball slides in the slide groove.

[0011] Furthermore, the channel is inclined, and the end of the channel close to the inner tube is lower, and the end of the cutting knife away from the inner tube is configured as an inclined structure, and the inclined structure matches the inclined surface of the inclined block. The channel is inclined so that the feed direction of the cutting knife is inclined downward, and the initial position of the cutting knife is a certain distance away from the exit position of the channel, leaving time for the core to enter, so that the cutting knife head can act on the core some time after the trigger assembly is triggered, thereby avoiding leaving large damage marks on the side of the core due to the cutting head contacting the core too early, thereby destroying the integrity of the core.

[0012] Furthermore, a slide rail is provided on the inclined surface of the inclined block, and the slide rail is arranged along the inclination 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 matching relationship between the sliding sleeve and the slide rail, the cutting knife and the inclined block are slidably matched. When the driving rod is reset, the matching between the sliding sleeve and the slide rail causes the cutting knife to be pulled back to the initial position.

[0013] Furthermore, in order to be able to drive more cutting knives at the same time, the separation component also includes: an annular disk, a circular hole is opened on the annular disk, the driving rod passes through the circular hole and is connected to the annular disk, so that the annular disk moves up and down following the driving rod, and in the third chamber, multiple channels are arranged with the central axis of the inner tube as the axis, and a cutting knife is set in each channel. Multiple tool driving rods are set at the positions corresponding to the channels on the bottom surface of the annular disk, and each tool driving rod is provided with an inclined block. By moving the driving rod downward, multiple cutting knives can cut the core from multiple different directions.

[0014] Furthermore, a plurality of sleeves are provided at the bottom of the third chamber corresponding to the position of the drive rod and each tool drive rod, and a third spring is provided in each sleeve. The sleeve can not only keep the sliding direction of the cutting knife drive rod vertical, but also reset the cutting knife drive rod through the third spring.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention provides a detachable inner tube inside the outer tube of the sampling device, and a slide plate is slidably provided in the inner tube. The slide plate is driven to slide along the length direction of the inner tube through the entry of the rock sample. A trigger assembly is provided at the top of the inner tube, and a clamping assembly and a separation assembly are provided at the bottom of the inner tube. A driving rod is provided between the clamping assembly, the separation assembly and the trigger assembly. After the length of the sampled core reaches a set length, the slide plate just squeezes the trigger assembly. At this time, the driving rod is driven by the trigger assembly, and the clamping assembly is driven by the driving rod, so that the clamping claws tightly grasp the core sample, ensuring the stability of the lowest position of the core sample in the inner tube, thereby preventing the entire core sample from falling off, sliding out and breaking from the inner tube when the outer tube exits the drilling, thereby ensuring the integrity of the sampled core sample. In addition, the driving rod of the present invention can drive the separation assembly while driving the clamping assembly, so that the sample and the matrix are separated, avoiding the problem that the sample is unqualified and has poor integrity due to the last section of the sample and the matrix being not separated when the outer tube exits the drilling.

[0017] 2. The present invention provides a clamping assembly at the top of the inner tube. When the trigger head is squeezed upward and the driving rod slides downward to clamp the core, the second spring is squeezed, the first spring is stretched, and the clamping head enters the clamping groove to keep the trigger head in a fixed position, thereby ensuring that the clamping claw continuously clamps the core when the outer tube is withdrawn, further ensuring the stability of the core sample in the inner tube. After the outer tube is completely withdrawn from the drilling, when the obtained core needs to be taken out, the clamping head is released, and the slide plate loses the force of lifting the core, and the first spring contracts and resets, and the second spring rebounds and resets, so that the trigger head, the slide plate and the driving rod are reset, and when the slide plate is reset, the core is pushed outward. At the same time as the slide plate is reset, the driving rod is reset so that the rack drives the lead screw assembly to drive the clamping claw to start to move away from the core, thereby releasing the core. The sampling device of the present invention not only ensures the stability of the sampled sample in the inner tube during the withdrawal of the outer tube from the drilling process, but also when the sample needs to be taken out, the sample in the tube is pushed out by the slide plate through the reset of the slide plate and the driving rod, 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. The channel of the present invention is tilted so that the cutting knife's feed direction is tilted downward, and the cutting knife's initial position is a certain distance away from the channel's exit position, so that the cutting knife's blade can act on the core only after the trigger assembly has been triggered for a period of time, thereby avoiding leaving large damage marks on the side of the core due to the blade's premature contact with the core, thereby destroying the integrity of the core. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

[0025] Figure 7 for Figure 2 An enlarged view of the structural schematic diagram of the middle A area.

[0026] Figure 8 for Figure 2 An enlarged view of the schematic diagram of the structure of the middle B area.

[0027] Fig. 9 for Figure 2 An enlarged view of the structural schematic diagram of the middle C area.

[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. slide groove, 25. handle, 4. trigger assembly, 41. trigger rod, 411. first spring, 42. trigger head, 43. transmission slider, 431. transmission slider slide rail, 44. driven slider, 5. slide plate, 51. ball, 6. drive rod, 61. sleeve, 62. second spring, 63. rack, 7. engaging assembly, 71. clamping head, 72. clamping groove, 8. clamping assembly, 81. bearing plate, 82. clamping claw, 83. lead screw slider, 84. lead screw, 85. gear, 86. guide rod, 9. separation assembly, 91. cutting knife, 92. tool drive rod, 93. inclined block, 94. sleeve, 95. third spring, 96. annular disk. DETAILED DESCRIPTION

[0029] Combine the following Figures 1 to 9 , the specific embodiments of the present invention are described in detail. In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are 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 limiting the present invention.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0031] It should be noted that the connection between the outer tube and the driving part driving the outer tube to drill is a conventional connection method, and the driving part is a commercially available product, which does not involve any innovation.

[0032] Example

[0033] like Figure 1 As shown, a hard rock formation exploration sampling device comprises: an outer tube 1 and a driving part for driving the outer tube 1 to rotate and drill, and a drill bit is provided at the drilling end of the outer tube 1, such as Figure 2As shown, the sampling device also includes: an inner tube 2, a driving rod 6, a clamping assembly 8 and a trigger assembly 4. The inner tube 2 is sleeved and connected to the inside of the outer tube 1, and drills along with the outer tube 1. There is a channel in the middle of the drill bit for the rock 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 on the top of the inner tube 2, and a second chamber 22 and a third chamber 23 are provided near the bottom. The second chamber 22 and the third chamber 23 are both annular chambers, and the second chamber 22 is located above the third chamber 23, and the third chamber 23 is above the drill bit. A plurality of notches 221 connected to the inside of the inner tube 2 are provided along the wall of the second chamber 22, and a plurality of channels 231 connected to the inside of the inner tube 2 are provided on the wall of the third chamber 23. A cutting knife 91 is sleeved in each channel 231, as shown in FIG. Figure 2 As shown, a slide plate 5 is slidably arranged inside the inner tube 2 and slides along its length direction. As the outer tube 1 is drilled, the structure of the rock layer enters the inner tube 2, and as the outer tube 1 is continuously drilled, the rock layer structure in the inner tube 2 continuously lifts up the slide plate 5, so that the slide plate 5 slides toward the top of the inner tube 2. A plurality of sleeves 61 are arranged in the wall of the inner tube 2, and the plurality of sleeves 61 are arranged in a circular array with the central axis of the inner tube 2 as the axis, and each sleeve 61 is used to connect 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 make the driving rods 6 slide up and down stably, as shown in FIG. Figure 2 As shown, a driven slider 44 is provided at the top of each driving rod 6, and a slope is provided on the side of the driven slider 44 close to the rock structure, as shown in FIG. Figure 2 , Figure 8 and Fig. 9 As shown, one end of each driving rod 6 located in the second chamber 22 is equipped with a rack 63, and one end located in the third chamber 23 is equipped with an inclined block 93; 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 a set size to prevent the core from slipping out of the pipe body when the outer pipe 1 is withdrawn from the drilling well. The number of the clamping assemblies 8 corresponds to that of the driving rods 6, as shown in FIG. Figure 2 Hehe Figure 8 As shown, each clamping assembly 8 includes: a screw assembly and a clamping claw. The screw assembly is horizontally arranged in the second chamber 22. A gear 85 meshing with the rack 63 is sleeved on the screw 84. It is worth noting that the screw assembly is a commercially available product, which has a screw 84, a screw slider 83 and a guide rod 86, which will not be described in detail here; the clamping claw 81 is arranged on the screw slider 83 of the screw assembly, and the driving rod 6 slides up and down to make the rack 63 drive the gear 85 to rotate, thereby rotating the screw 84, so that the screw slider 83 slides along the guide rod 86, so that the clamping claw 81 enters the inner tube 2 from the notch 221 to clamp the core; as shown in FIG. Figure 2 and Figure 7As shown, the trigger assembly 4 includes: a trigger rod 41, a trigger head 42 and a transmission slider 43. The trigger rod 41 vertically penetrates the bottom plate of the first chamber 22 and can slide vertically up and down; the trigger head 42 is a conical platform structure, connected to one end of the trigger rod 41 located in the first chamber 22; the transmission slider 43 is a conical platform structure, sliding at the top of the first chamber 21, 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 drive rod 6 slide downward, so that the gear The bar 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 core. At the same time, the inclined block 93 squeezes the cutting knife 91 from the channel 231 into the inner tube 2 to cut the core. In order to reduce the friction between the trigger head 42, the transmission slider 43 and the driven slider 44, the inclined surface where the transmission slider 43 contacts the trigger head 42 and the driven slider 44 is provided with rolling steel balls. The rolling of the steel balls on the inclined surface can improve the trigger response between the transmission slider 43 and the trigger head 42 and the driven slider 44. Speed, and a transmission slider rail 431 is provided at the top of the first chamber 21. The transmission slider rail 431 can not only provide a fixed sliding route for the transmission slider 43, but also make the transmission slider 43 suspended in the air through the height of the transmission slider rail 431, so as to leave enough rising space for the trigger head 42. In this embodiment, four clamping claws 81, four driving rods 6 and four transmission sliders 43 are selected. When the obtained rock samples continuously enter the inner tube 2, the slide plate 5 is lifted up to squeeze the trigger rod 41 upward, so that the trigger head 42 moves upward , thereby squeezing the four transmission sliders 43 located on the peripheral side thereof, and the four transmission sliders 43 slide along their corresponding transmission slider rails 431 respectively, and squeeze the corresponding driven slider 44, so that the four driving rods 6 move downward synchronously, and the rack 63 on each driving rod 6 drives the corresponding screw assembly through the gear 85, so that the four clamping claws 82 approach the core synchronously from four directions, and through the clamping and fixing in four directions, the clamping and fixing effect of the core is improved, and the core is avoided to a great extent from falling off when the outer tube 1 is withdrawn from drilling.

[0034] like Figure 2 and Figure 7 As shown, the sampling device also includes: a snap-fit ​​assembly 7, the snap-fit ​​assembly 7 includes a clamping head 71 and a clamping slot 72, 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. It is worth noting that the snap-fit ​​assembly 7 can adopt a commercially available product, as long as the clamping head 71 can be lifted by the trigger head 42 and matched with the clamping slot 72, and the clamping head 71 can be released from the top of the inner tube 2 to reset the first spring 411 and the second spring 62.

[0035] In some embodiments, 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 make the driving rod 6 slide downward to clamp the core, the second spring 62 is pressed, the first spring 411 is stretched, and the clamping head 71 enters the clamping groove 72 to keep the triggering head 42 in a fixed position, thereby ensuring that the clamping claw 82 continuously clamps the core when the outer tube 1 is withdrawn. After the outer tube 1 is completely withdrawn from the drilling well, When the obtained core is taken out, the clamping head 71 is released. At this time, the slide plate 5 loses the force to lift the core, and the first spring 411 shrinks and resets, and the second spring 62 rebounds and resets, so that the trigger head 42, the slide plate 5 and the driving rod 6 are reset. When the slide plate 5 is reset, the core is pushed to move outward. At the same time as the driving rod 6 is reset, the rack 63 drives the screw assembly to drive the clamping claw 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 the inner tube 2.

[0036] In some embodiments, in order to facilitate the disassembly and maintenance of the inner tube 2, a section of the inner tube 2 near the bottom end is connected to a section of the outer tube 1 near the bottom end by a threaded connection, and a handle 25 of a tubular structure is provided above the top plate of the inner tube 2. A plurality of holes are provided on the circumference of the handle 25. The handle 25 is held and fingers are buckled on the holes to facilitate the rotation of the inner tube 2.

[0037] In such Figure 8 In the illustrated embodiment, the clamping assembly 8 further comprises a bearing plate 81, which is vertically arranged, and a hole is opened in the middle of the bearing plate 81, which is connected to the lead screw slider 83 through the hole. The clamping assembly 8 is provided with two clamping claws 82, which are arranged at high and low positions on the bearing plate 81, and a notch 221 is provided at a position corresponding to another clamping claw 82 in the second chamber 22. By means of the two clamping claws 82 arranged at high and low positions, when the core at the bottom is broken, the two sections of the core can be fixed separately, so as to achieve a better clamping effect, such as Figure 8 As shown, Figure 4 and Figure 8 As shown, each slot 221 is provided with a baffle 222, which is a rubber plate, and each slot 221 is provided with two baffles 222. The two baffles 222 are respectively connected to the top and bottom of the slot 221, and the middle is used for the clamping claw 82 to pass through, and the baffle 222 is used to prevent rock particles from entering the second chamber 22.

[0038] like Figure 2 and Figure 3 As shown, 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 , and a ball 51 is rolled in each inlay groove, and the ball 51 slides in the slide groove 24 .

[0039] In such Fig. 9 In the embodiment shown, 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 knife 91 away from the inner tube 2 is configured as an inclined surface structure, and the inclined surface structure matches the inclined surface of the inclined block 93. When the driving rod 6 moves downward, the cutting knife 91 is squeezed by the inclined block 93 to feed toward the core, as shown in FIG. Fig. 9 As shown, the channel 231 is inclined so that the feed direction of the cutting knife 91 is inclined downward, and the initial position of the cutting knife 91 is a distance away from the exit position of the channel 231, leaving time for the core to enter, so that the cutting head of the cutting knife 91 can act on the core some time after the trigger component 4 is triggered, so as to avoid leaving large damage marks on the side of the core due to the cutting head contacting the core too early, thereby destroying the integrity of the core. The separation component 9 of this embodiment can be used alone, and can also be used in conjunction with the existing technology of vibrating the core to separate the core from the parent rock. In addition, the multiple cutting knives 91 of this embodiment cut the core from multiple directions, leaving incisions at multiple points around the core, providing separation points for core vibration breaking, which not only makes it easier to separate the core from the parent rock, but also causes less damage to the separated cross section, and can better ensure the integrity of the core sample.

[0040] like Fig. 9 As 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 knife 91, and the sliding sleeve is sleeved and slides on the slide rail. Through the matching relationship between the sliding sleeve and the slide rail, the cutting knife 91 and the inclined block 93 are slidably matched. When the driving rod 6 is reset, the matching between the sliding sleeve and the slide rail causes the cutting knife 91 to be pulled back to the initial position.

[0041] In some embodiments, Figure 5 , Figure 6 and Fig. 9 As shown, in order to be able to set more cutting knives 91, the sampling device also includes: an annular disk 96, a circular hole is opened on the annular disk 96, the 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 with 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 set in each channel 231, and a plurality of tool driving rods 92 are set on the bottom surface of the annular disk 96 at the position corresponding to the channel 231, and each tool driving rod 92 is provided with an inclined block 93, and the driving rod 6 is moved downward to make the plurality of cutting knives 91 cut the core from a plurality of different directions.

[0042] like Fig. 9As shown, a plurality of sleeves 94 are provided at the bottom of the third chamber 23 corresponding to the position of the drive rod 6 and each tool drive rod 92, and a third spring 95 is sleeved in each sleeve 94. The sleeve 94 can not only keep the sliding direction of the cutting knife drive rod 92 vertical, but also reset the cutting knife drive rod 92 through the third spring 95.

[0043] The above disclosures are only several preferred specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. 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 (81) 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 (22); a trigger head (42) having a conical platform structure and connected to one end of the trigger rod (41) located in the first chamber (22); 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: The separation assembly (9) further comprises: an annular disk (96), a circular hole being formed on the annular disk (96), a driving rod (6) passing through the circular hole and being 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), 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 into 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) corresponding to the position of the drive rod (6) and each tool drive rod (92), and a third spring (95) is sleeved in each of the sleeves (94).

Images