Rock core sampling drilling tool for geological exploration
By designing movable pocket teeth and driving mechanism in the core sampling drill tool, the problems of core fracture drop and redundant extrusion of the spring body are solved, and safe and stable sampling of the core is achieved.
Patent Information
- Application Number
- CN202510090849.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-04-15
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During geological exploration, loose cores are prone to breaking and falling, resulting in damage to the drill tool, and redundant extrusion pressure is formed under the action of vibration force between the spring and the spring seat, affecting the core sampling operation.
A core sampling drill tool for geological exploration is designed, using movable pocket teeth and driving mechanism, and the bottom end of the pocket teeth is moved to the bottom of the core to provide support to prevent core from breaking and falling; at the same time, through the design of the drive mechanism, the spring body is prevented from moving downwards and avoid unnecessary squeeze pressure.
Effectively prevent the core from breaking and falling during upward movement, reduce damage to the drill tool, and avoid redundant squeeze pressure between the spring body and the spring seat, improving the safety and stability of the core sampling operation.
Smart Images
Figure CN119825269A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of core drilling tools, and in particular to a core sampling drilling tool for geological exploration. Background Art
[0002] Rope coring drill is one of the core sampling drills, mainly used for drilling a single core. Compared with other drilling methods, it has the characteristics of high production efficiency, good geological effect, low labor intensity and low drilling cost. Rope coring drill is generally composed of two parts: a salvage device and a single-action double tube (outer tube assembly, inner tube assembly). The outer tube assembly includes: a spring-loaded stopper, a spring-loaded chamber, a stable joint (upper reamer), an outer tube, a lower reamer, and a drill bit; the inner tube assembly includes: a spearhead, spring-loaded positioning, suspension, in-place notification, core blockage alarm, single action, inner tube protection, adjustment, straightening, inner tube, core clamping and other mechanisms. It not only has the same function as an ordinary diamond double tube drill, but also the inner tube assembly that holds the core can be raised and lowered from the drill string.
[0003] Rope coring is a method of removing cores from the bottom of a hole without removing the drill bit and drilling tools. The outer core tube connected to the drill bit and the inner core tube containing the core are locked with a spring pin, and can also be disengaged and separated. After drilling a certain footage that does not exceed the length of the inner core tube, stop the pump and drill, and use a thin wire rope from the drill pipe to lower the salvage device from the ground. When it reaches the bottom of the hole, grab the salvage head of the inner core tube, then lift it up to disengage the pin, separate the inner and outer core tubes, lift the inner core tube from the drill pipe to the ground, take out the core, and when it reaches the bottom of the hole, the pin locks the outer core tube again, and then connect the flushing and drilling, and continue coring drilling.
[0004] In the actual drilling construction process, the drill rod is often thousands of meters long. For some loose cores, it is easy to break and fall during the movement. The broken core will cause damage to the inner wall of the drill tool, especially the drill bit, during the falling process. In addition, the inner tube assembly will inevitably hit the inner wall of the drill rod during the upward movement, and vibration will be generated at the moment of impact, causing the retaining spring and the core to move downward relative to the retaining spring seat, increasing the extrusion force between the retaining spring and the retaining spring seat. This increased extrusion force is redundant and unnecessary relative to the clamping force on the core, and causes the retaining spring and the retaining spring seat to be too tight, which is not conducive to the subsequent operation of removing the core from the inner tube. Summary of the invention
[0005] The present application proposes a core sampling drill for geological exploration, which has the advantages of preventing the core from breaking and falling and preventing the formation of extrusion redundancy between the retaining spring and the retaining spring seat under the action of vibration force, so as to solve the problems raised in the above background technology.
[0006] To achieve the above purpose, the present application adopts the following technical solution: A core sampling drill for geological exploration, comprising:
[0007] Drill bits are used for drilling into the wellhead and drilling out the core.
[0008] The outer tube is threadedly connected to the top of the drill bit.
[0009] The core tube is arranged inside the outer tube and is used to take out the core.
[0010] The retaining spring seat is connected with the core tube thread, is sleeved on the outer circumference of the core, and performs the core breaking operation on the core.
[0011] The clamping spring body is coaxially assembled in the clamping spring seat and cooperates with the core sampling tube to clamp the core by utilizing the friction force of the clamping spring seat on the core.
[0012] The bag teeth are arranged on the inner wall of the retaining spring seat, and the bottom end of the bag teeth moves to the bottom of the core after the core is broken, so as to support the core.
[0013] The driving mechanism is arranged on the inner wall of the retaining spring seat and is used for driving the pocket teeth to move.
[0014] Further, the driving mechanism includes an assembly positioning component, and the assembly positioning component includes:
[0015] The oblique protrusion 1 is arranged on the inner wall of the retaining spring seat and protrudes from the inner wall of the retaining spring seat, and the top surface of the oblique protrusion 1 is inclined downward.
[0016] The second oblique protrusion is arranged on the inner wall of the retaining spring seat and is located below the first oblique protrusion, and the top surface of the second oblique protrusion is inclined downward.
[0017] The inner groove is arranged on the inner wall of the clamping spring body and matches with the inclined protrusion one, and the inclined protrusion one is clamped in the inner groove.
[0018] The convex plate is arranged on the inner wall of the circlip body and faces one side of the circlip seat, and one end of the convex plate close to the circlip seat is placed on the inclined protrusion 2.
[0019] Furthermore, the driving mechanism further comprises a guide groove group, and the guide groove group comprises:
[0020] The outer groove is arranged on the inner wall of the circlip seat close to the circlip body, the second oblique protrusion is located in the outer groove, the top wall of the outer groove is inclined downward toward the inner side of the circlip seat, and the circlip body covers the outer periphery of the outer groove.
[0021] There are two side rod grooves, which are arranged inside the retaining ring seat and on both sides of the outer groove, and the openings of the side rod grooves face the outer groove.
[0022] The ear groove is arranged inside the retaining spring seat and is located at the bottom end of the side rod groove. The inner diameter of the ear groove is larger than the inner diameter of the side rod groove.
[0023] Furthermore, the driving mechanism further comprises a moving mechanism, and the moving mechanism comprises:
[0024] The rotating rod has two ends respectively located in the side rod grooves on both sides of the outer groove, and the rotating rod passes through the outer groove horizontally.
[0025] The sleeve shaft is sleeved on the rotating rod, the sleeve shaft is located in the outer groove, and the bottom end of the sleeve shaft is connected to the pocket teeth.
[0026] The rod ear is connected to the outer wall of the rotating rod located in the side rod groove, forming a T-shaped end with the rotating rod, the inner diameter of the side rod groove is smaller than the sum of the widths of the rod ear and the rotating rod, the T-shaped end formed by the rotating rod and the rod ear slides in the side rod groove, the inner diameter of the ear groove is larger than the sum of the widths of the rod ear and the rotating rod, and the T-shaped end formed by the rotating rod and the rod ear rotates in the ear groove.
[0027] The connecting rod is connected to the upper end of the sleeve shaft, and the sleeve shaft and the pocket gear connected to the sleeve shaft are driven to rotate through the rotation of the connecting rod.
[0028] The push plate guides the rotation of the top end of the connecting rod. The top end of the connecting rod is rotatably connected to the groove body inside the push plate. The shape of the push plate is arc-shaped and the arc matches the trajectory of the rotation of the connecting rod. The push plate is slidably connected in the outer groove.
[0029] The push rod is arranged above the push plate and in the outer groove. A downward pressure is applied to the push rod, and the top end of the push rod extends to the bottom of the second inclined protrusion, and the protrusion plate contacts the push rod.
[0030] Furthermore, the driving mechanism further comprises a reset component, and the reset component comprises:
[0031] The fixed plate is arranged in the side rod groove and is located at the upper limit position of the side rod groove.
[0032] A spring, one end of which is connected to the bottom surface of the fixed plate and the other end of which is connected to the rotating rod, is used to pull the rotating rod upward to restore it to its original position.
[0033] This application has the following beneficial effects:
[0034] 1. The present application provides a core sampling drill for geological exploration. A movable tooth is arranged on the inner wall of a retaining spring seat, and a movable mechanism is used to drive the tooth to move downward so that the bottom end of the tooth is located below the core and an upward supporting force is applied to the core, thereby protecting the core from breaking and falling during the upward movement, avoiding damage to the drill after the core falls, and achieving the function of increasing the safety and stability of the core during the upward movement.
[0035] 2. The present application provides a core sampling drill for geological exploration, which realizes the downward movement of the bag tooth by squeezing the push rod with the convex plate, and realizes the rotation of the bag tooth by cooperating with the rotation of the push plate and the connecting rod. When the bottom end of the bag tooth is located at the bottom end of the core, when the bag tooth continues to rotate, an upward force is continuously applied to the core, and in combination with the friction force of the core on the retaining spring body, the function of the bag tooth applying an upward force to the retaining spring body is realized when the retaining spring body moves downward due to obstruction or vibration, thereby hindering the retaining spring body from moving downward and preventing the excessive extrusion force between the retaining spring body and the retaining spring seat from being unfavorable for the coring operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.
[0037] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:
[0038] Figure 1 This is a schematic diagram of the structure of the present invention in which the rabbet is moved to the bottom end of the core;
[0039] Figure 2 for Figure 1 Schematic diagram of the status of the middle pocket gear and the driving mechanism;
[0040] Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle;
[0041] Figure 4 This is a schematic diagram of the structure in which the pocket teeth of the present invention are located inside the retaining spring seat;
[0042] Figure 5 for Figure 4 Schematic diagram of the status of the middle pocket gear and the driving mechanism;
[0043] Figure 6 for Figure 5 The enlarged schematic diagram of point B in the middle;
[0044] Figure 7 It is a partial front view of the inner wall of the retaining spring seat of the present invention;
[0045] Figure 8 It is a schematic diagram of the partial cross-sectional structure of the oblique protrusion 1 and the inner groove of the present invention;
[0046] Fig. 9 It is a schematic diagram of the partial bottom view of the push plate of the present invention;
[0047] Fig.10 It is a partial top view of the structure of the retaining spring seat of the present invention.
[0048] In the figure: 1, drill bit; 2, outer tube; 3, core tube; 4, retaining spring seat; 401, inclined protrusion one; 402, inclined protrusion two; 411, outer groove; 412, side rod groove; 413, ear groove; 5, retaining spring body; 501, inner groove; 502, convex plate; 6, pocket teeth; 7, driving mechanism; 711, fixed plate; 712, spring; 701, push rod; 702, push plate; 703, connecting rod; 704, rotating rod; 705, sleeve shaft; 706, rod ear; 8, core. DETAILED DESCRIPTION
[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0050] See also Figure 1 and Figure 4 , a core sampling drill for geological exploration, comprising:
[0051] The drill bit 1 is used for drilling into the wellhead and drilling out the core 8.
[0052] The outer tube 2 is threadedly connected to the top of the drill bit 1; it is used to fix and limit the core tube 3 and disconnect the limiting function of the core tube 3, so that the core tube 3 can be removed from the drill bit 1. The top of the outer tube 2 is threadedly connected to the drill rod.
[0053] The coring tube 3 is arranged inside the outer tube 2 and is used to take out the core 8. The core 8 can be taken out repeatedly from the outer tube 2 and the drill rod above the outer tube 2.
[0054] The retaining spring seat 4 is threadedly connected with the coring tube 3 , is sleeved on the outer circumference of the core 8 , and performs a core breaking operation on the core 8 .
[0055] The spring body 5 is coaxially assembled in the spring seat 4, and cooperates with the core tube 3 to clamp the core 8 by the friction force of the spring seat 4 on the core 8. Generally speaking, the core breaking operation of the core 8 is to lift the drill bit 1 for a certain distance, and use the wedge-shaped cooperation between the inner wall of the drill bit 1 and the outer wall of the spring seat 4 to make the spring seat 4 move upward, and the spring body 5 approaches the core 8 and contacts the core 8 by compression. When the spring seat 4 continues to move upward, the spring body 5 slides downward along the inner wall of the spring seat 4 under the action of the friction force of the core 8, increasing the pressure between the spring body 5 and the core 8, and then increasing the friction between the spring body 5 and the core 8. The spring seat 4 continues to move upward, and the core 8 moves upward with the spring body 5 under the action of friction, and the core 8 is broken with the rock at the bottom under the action of tension. Then the core tube 3 and the inner tube assembly are moved out of the drill pipe under the upward pulling force of the spear fishing mechanism to achieve the core taking function. The above is prior art, and the inner tube assembly is not shown in the figure.
[0056] The pocket teeth 6 are arranged on the inner wall of the retaining spring seat 4, and the bottom end of the pocket teeth 6 moves to the bottom of the core 8 after the core is broken, so as to support the core 8. In order to prevent the core 8 from breaking during the upward movement, the pocket teeth 6 are used to support and support the core 8, so as to reduce the situation that the core 8 falls downward after breaking, thereby preventing the falling core from damaging the drill bit 1, the outer tube 2 and the drill rod.
[0057] The driving mechanism 7 is arranged on the inner wall of the spring seat 4 and is used for driving the pocket teeth 6 to move.
[0058] See attached Figure 2 and attached Figure 5 The driving mechanism 7 includes an assembly positioning component, and the assembly positioning component includes:
[0059] The oblique protrusion 1 401 is disposed on the inner wall of the retaining spring seat 4 and protrudes from the inner wall of the retaining spring seat 4. The top surface of the oblique protrusion 1 401 is inclined downward.
[0060] The second oblique protrusion 402 is disposed on the inner wall of the retaining spring seat 4 and is located below the first oblique protrusion 401 , and the top surface of the second oblique protrusion 402 is inclined downward.
[0061] The inner groove 501 is formed on the inner wall of the retaining spring body 5 and matches with the inclined protrusion 1 401 . The inclined protrusion 1 401 is clamped in the inner groove 501 .
[0062] The convex plate 502 is arranged on the inner wall of the spring body 5 and faces the side of the spring seat 4 , and one end of the convex plate 502 close to the spring seat 4 is placed on the inclined protrusion 2 402 .
[0063] See attached Figure 8By matching the positions of the oblique protrusion 1 401 and the inner groove 501 and the clamping action of the oblique protrusion 1 401 and the inner groove 501, the initial position of the circlip body 5 in the circlip seat 4 is limited and the circlip body 5 is fixed at the initial position. And by supporting the convex plate 502 by the oblique protrusion 2 402, the circlip body 5 is further limited and fixed. That is to say, when assembling the circlip seat 4 and the circlip body 5, the inner groove 501 is clamped with the oblique protrusion 1 401, and the convex plate 502 is placed on the oblique protrusion 2 402. The top walls of the inclined protrusion 1 401 and the inclined protrusion 2 402 are both inclined downward. After the retaining spring body 5 contacts the core 8, when the retaining spring seat 4 moves upward, under the downward friction force of the core 8 on the retaining spring body 5, the inclined protrusion 1 401 moves out from the inner groove 501, and the convex plate 502 is slightly deformed and moves from above the inclined protrusion 2 402 to below the inclined protrusion 2 402. Then, when the retaining spring seat 4 continues to move upward under the action of the core sampling tube 3, the retaining spring body 5 moves downward along the inner wall of the retaining spring seat 4 under the friction force of the core 8, further increasing the squeezing pressure of the retaining spring body 5 on the core 8, and increasing the friction between the retaining spring body 5 and the core 8, so that the core 8 remains stable relative to the retaining spring body 5.
[0064] See attached Figure 2 , Attachment Figure 3 , Attachment Figure 5 , Attachment Figure 6 and attached Figure 7 The driving mechanism 7 further comprises a guide groove group, the guide groove group comprises:
[0065] The outer groove 411 is formed on the inner wall of the circlip seat 4 near the circlip body 5, the second oblique protrusion 402 is located in the outer groove 411, the convex plate 502 and the top wall of the outer groove 411 are inclined downward toward the inner side of the circlip seat 4, and the circlip body 5 covers the outer periphery of the outer groove 411. The inclined top wall of the outer groove 411 facilitates the assembly of the inner groove 501 and the convex plate 502 with the oblique protrusion 1 401 and the oblique protrusion 2 402 respectively.
[0066] There are two side rod grooves 412 . The side rod grooves 412 are opened inside the spring seat 4 and are located on both sides of the outer groove 411 . The openings of the side rod grooves 412 face the outer groove 411 .
[0067] The ear groove 413 is formed inside the retaining spring seat 4 and is located at the bottom end of the side rod groove 412 . The inner diameter of the ear groove 413 is greater than the inner diameter of the side rod groove 412 .
[0068] See attached Figure 3 , Attachment Figure 6 , Attachment Figure 7 , see attached Fig. 9 and attached Fig.10 The driving mechanism 7 also includes a moving mechanism, and the moving mechanism includes:
[0069] The rotating rod 704 has two ends respectively located in the side rod grooves 412 on both sides of the outer groove 411 , and the rotating rod 704 passes through the outer groove 411 horizontally.
[0070] The sleeve shaft 705 is sleeved on the rotating rod 704 . The sleeve shaft 705 is located in the outer groove 411 . The bottom end of the sleeve shaft 705 is connected to the pocket teeth 6 .
[0071] The rod ear 706 is connected to the outer wall of the rotating rod 704 located in the side rod groove 412, and forms a T-shaped end with the rotating rod 704. The inner diameter of the side rod groove 412 is smaller than the sum of the widths of the rod ear 706 and the rotating rod 704, and the T-shaped end formed by the rotating rod 704 and the rod ear 706 slides in the side rod groove 412; the inner diameter of the ear groove 413 is larger than the sum of the widths of the rod ear 706 and the rotating rod 704, and the T-shaped end formed by the rotating rod 704 and the rod ear 706 rotates in the ear groove 413.
[0072] The connecting rod 703 is connected to the upper end of the sleeve shaft 705. The sleeve shaft 705 and the pocket gear 6 connected to the sleeve shaft 705 are driven to rotate through the rotation of the connecting rod 703.
[0073] The push plate 702 guides the rotation of the top end of the connecting rod 703. The top end of the connecting rod 703 is rotatably connected to the groove body inside the push plate 702. The shape of the push plate 702 is arc-shaped and the arc matches the rotation trajectory of the connecting rod 703. The push plate 702 is slidably connected in the outer groove 411.
[0074] The push rod 701 is arranged above the push plate 702 and in the outer groove 411 . When downward pressure is applied to the push rod 701 , the top end of the push rod 701 extends to the bottom of the second inclined protrusion 402 , and the protrusion plate 502 contacts the push rod 701 .
[0075] After the inner groove 501 and the oblique protrusion 401 are misaligned, the spring body 5 continues to move downward under the downward friction of the core 8 on the spring body 5, so that the convex plate 502 pushes the push rod 701 to move downward. Since the inner diameter of the side rod groove 412 is small, the T-shaped end composed of the rotating rod 704 and the rod ear 706 can only slide downward along the side rod groove 412. At the same time, the pocket tooth 6 moves downward along the outer groove 411 synchronously. When the T-shaped end composed of the rotating rod 704 and the rod ear 706 slides down into the ear groove 413, it can no longer move downward. At this time, the bottom end of the bag tooth 6 moves to the bottom of the core 8. When the retaining spring body 5 continues to move downward (note that the downward movement of the retaining spring body 5 at this time is under the action of the friction force of the core 8, when the retaining spring body 5 moves to the core 8 before the core is successfully broken and the core 8 after breaking drives the retaining spring body 5 to move to the lower limit position under gravity), the convex plate 502 squeezes the push rod 701, causing the connecting rod 703 to move along the inner groove of the push plate 702 toward the lower end of the push plate 702. The lower end of the push plate 702 is located on the side of the push plate 702 close to the inside of the retaining spring seat 4, so that the push plate 702 still has space to descend, and because the connecting rod 703 moves in an arc along the push plate 702, the sleeve shaft 705 rotates, and the rotating rod 704 and the rod ear 706 rotate in the ear groove 413 with a larger inner diameter. The bottom end of the tooth 6 rotates to the bottom of the core 8 and supports the core 8 , and can also prevent the broken core 8 from falling.
[0076] In addition, when the core tube 3 moves upward in the drill pipe, if it hits the inner wall of the drill pipe or is hindered by the dirt on the inner wall of the drill pipe, vibration will be generated at the moment of collision or obstruction, and the vibration will cause the clamping spring body 5 and the core 8 to move downward a certain distance relative to the clamping spring seat 4, thereby increasing the squeezing force between the clamping spring body 5 and the clamping spring seat 4. This increased squeezing force is not used to increase the stability of the clamping spring body 5 and the core 8, but is an unnecessary squeezing force, and this increased squeezing force will make it difficult to remove the clamping spring body 5 from the clamping spring seat 4, and thus it will be difficult to remove the core 8 from the clamping spring body 5.
[0077] In the present application, when the clamp body 5 hits the inner wall of the drill pipe or is hindered, it has a tendency to move downward. However, when the clamp body 5 moves downward, the convex plate 502 squeezes the push rod 701, and the push rod 701 squeezes the push plate 702 downward, which causes the connecting rod 703 to continue to move toward the lower end of the push plate 702 along the push plate 702, which also causes the sleeve shaft 705 to rotate, and finally drives the tooth 6 to rotate. After the core 8 is broken, the bottom end of the tooth 6 has rotated to the bottom of the core 8, exerting an upward thrust on the core 8, thereby hindering the core 8 from moving downward. Due to the friction of the core 8 on the clamp body 5, the function of hindering the clamp body 5 from moving downward is also achieved. This also reduces or even avoids the situation where the clamp body 5 and the core 8 move downward under vibration or obstruction, and prevents the problem of coring difficulties caused by excessive squeezing force between the clamp seat 4 and the clamp body 5.
[0078] In the present application, in order to prevent the different weights of the core each time from causing the retaining spring body 5 to move downward by different distances, and to ensure that the rotating rod 704 and the rod ear 706 can move into the ear groove 413 before the retaining spring body 5 moves to the lower limit position, it is ensured that when the retaining spring body 5 moves to the lower limit position, the rotating rod 704 and the rod ear 706 can rotate in the ear groove 413, and the longitudinal length of the ear groove 413 is reasonably increased to meet the weight of most cores 8.
[0079] The driving mechanism 7 also includes a reset component, which includes:
[0080] The fixed plate 711 is disposed in the side rod groove 412 and is located at the upper limit position of the side rod groove 412;
[0081] The spring 712 has one end connected to the bottom surface of the fixed plate 711 and the other end connected to the rotating rod 704, and is used to pull the rotating rod 704 upward to return to its original position.
[0082] After coring, the push rod 701 and the push plate 702, the connecting rod 703, the rotating rod 704, the sleeve shaft 705 and the rod ear 706 connected below the push rod 701 are all restored upward to the original position.
[0083] In this application, see the attached Figure 4 , Attachment Figure 5 and attached Figure 6 As shown in the figure, the bag teeth 6 are arc-shaped. In the initial state, the bag teeth 6 are located inside the retaining spring seat 4. The bottom end of the bag teeth 6 is stored inside the retaining spring seat 4 to prevent the bag teeth 6 from hindering the core 8 from moving into the core tube 3 during the drilling process. When the drilling is completed and the core 8 is taken out of the drill pipe, the retaining spring body 5 is moved downward to push the bag teeth 6 downward until the bottom end of the bag teeth 6 is located below the core 8, and then the bag teeth 6 are driven to rotate to form the following Figure 1 , Attachment Figure 2 and attached Figure 3 The state shown has the function of supporting and protecting the core 8.
Claims
1. A core sampling drill for geological exploration, characterized in that: include: A drill bit (1) for drilling into a wellhead and drilling out a core (8); An outer tube (2) is threadedly connected to the top of the drill bit (1); A coring tube (3) disposed inside the outer tube (2) and used for taking out a core (8); The retaining spring seat (4) is threadedly connected to the core sampling tube (3), sleeved on the outer circumference of the core (8), and performs a core breaking operation on the core (8); The clamping spring body (5) is coaxially assembled in the clamping spring seat (4) and cooperates with the core sampling tube (3) to clamp the core (8) by utilizing the friction force of the clamping spring seat (4) on the core (8); The tooth (6) is arranged on the inner wall of the spring seat (4), and the bottom end of the tooth (6) moves to the bottom of the core (8) after the core is broken, so as to support the core (8); The driving mechanism (7) is arranged on the inner wall of the spring seat (4) and is used for driving the pocket teeth (6) to move.
2. The core sampling drill for geological exploration according to claim 1, characterized in that: The driving mechanism (7) comprises an assembly positioning component, and the assembly positioning component comprises: The inclined protrusion 1 (401) is arranged on the inner wall of the retaining spring seat (4) and protrudes from the inner wall of the retaining spring seat (4), and the top surface of the inclined protrusion 1 (401) is inclined downward; The second inclined protrusion (402) is arranged on the inner wall of the spring seat (4), and is located below the first inclined protrusion (401), and the top surface of the second inclined protrusion (402) is inclined downward; An inner groove (501) is formed on the inner wall of the spring body (5) and matches the inclined protrusion 1 (401). The inclined protrusion 1 (401) is clamped in the inner groove (501); The convex plate (502) is arranged on the inner wall of the spring body (5) and faces the side of the spring seat (4). The end of the convex plate (502) close to the spring seat (4) is placed on the second inclined protrusion (402).
3. The core sampling drill for geological exploration according to claim 2, characterized in that: The driving mechanism (7) further comprises a guide groove group, wherein the guide groove group comprises: The outer groove (411) is formed on the inner wall of the retaining spring seat (4) close to the retaining spring body (5), the second inclined protrusion (402) is located in the outer groove (411), the top wall of the outer groove (411) is inclined downward toward the inner side of the retaining spring seat (4), and the retaining spring body (5) covers the outer periphery of the outer groove (411); Side rod grooves (412), there are two side rod grooves (412), the side rod grooves (412) are opened inside the spring seat (4) and are located on both sides of the outer groove (411), and the openings of the side rod grooves (412) face the outer groove (411); The ear groove (413) is opened inside the spring seat (4) and is located at the bottom end of the side rod groove (412). The inner diameter of the ear groove (413) is larger than the inner diameter of the side rod groove (412).
4. The core sampling drill for geological exploration according to claim 3, characterized in that: The driving mechanism (7) further comprises a moving mechanism, wherein the moving mechanism comprises: A rotating rod (704), two ends of which are respectively located in the side rod grooves (412) on both sides of the outer groove (411), and the rotating rod (704) passes through the outer groove (411) transversely; A sleeve shaft (705) is sleeved on the rotating rod (704), the sleeve shaft (705) is located in the outer groove (411), and the bottom end of the sleeve shaft (705) is connected to the pocket tooth (6); The rod ear (706) is connected to the outer wall of the rotating rod (704) located in the side rod groove (412) to form a T-shaped end with the rotating rod (704). The inner diameter of the side rod groove (412) is smaller than the sum of the widths of the rod ear (706) and the rotating rod (704). The T-shaped end formed by the rotating rod (704) and the rod ear (706) slides in the side rod groove (412). The inner diameter of the ear groove (413) is larger than the sum of the widths of the rod ear (706) and the rotating rod (704). The T-shaped end formed by the rotating rod (704) and the rod ear (706) rotates in the ear groove (413). A connecting rod (703) is connected to the upper end of the sleeve shaft (705), and the sleeve shaft (705) and the pocket gear (6) connected to the sleeve shaft (705) are driven to rotate by the rotation of the connecting rod (703); The push plate (702) guides the rotation of the top end of the connecting rod (703). The top end of the connecting rod (703) is rotatably connected to the groove body inside the push plate (702). The push plate (702) is in an arc shape and the arc shape matches the rotation trajectory of the connecting rod (703). The push plate (702) is slidably connected in the outer groove (411); The push rod (701) is arranged above the push plate (702) and in the outer groove (411). When downward pressure is applied to the push rod (701), the top end of the push rod (701) extends to the bottom of the second inclined protrusion (402), and the protrusion plate (502) contacts the push rod (701).
5. The core sampling drill for geological exploration according to claim 4, characterized in that: The driving mechanism (7) further comprises a reset component, wherein the reset component comprises: A fixed plate (711) is disposed in the side rod groove (412) and is located at an upper limit position of the side rod groove (412); The spring (712) has one end connected to the bottom surface of the fixed plate (711) and the other end connected to the rotating rod (704) for pulling the rotating rod (704) upward to restore it to its original position.