Drilling coring device

Abstract

The utility model belongs to the technical field of exploration, and discloses a drilling coring device which comprises a coring pipe and a rotary pushing mechanism. The coring tube is in a tubular column shape with a hollow interior and an open end; a plurality of rotating grooves are formed in the circumferential wall of the inner side of the coring pipe, and the rotating grooves and the coring pipe are coaxially arranged; clamping strips which are coaxially arranged are rotationally connected into the rotating grooves, and the sides, close to the central axis of the coring pipe, of the clamping strips are flush with the peripheral wall of the inner side of the coring pipe; a driving unit is arranged at the end, away from the opening, of the coring pipe, all the clamping strips are connected with the driving unit, and the driving unit is used for driving all the clamping strips to rotate around the axes of the clamping strips; the rotary pushing mechanism is detachably connected with the end, away from the opening, of the coring pipe. Through the cooperative design of the rotary clamping strip, the rotating groove and the driving unit, the integrity of the inner wall of the coring pipe during drilling is guaranteed, effective entering of a rock core is guaranteed, the peripheral side of the rock core can be clamped during drill lifting, the bottom of the rock core can be conveniently separated from the stratum, and the phenomenon that the inner rock core slides down when the coring pipe is lifted can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of exploration technology, more particularly to a drilling coring device. BACKGROUND

[0002] In the field of resource exploration and engineering geological survey, drilling coring technology is a key means to obtain the original sample of underground rock stratum. In the traditional coring operation, the coring tube is cut in the rock stratum by rotating to form a columnar rock core, and the rock core gradually enters the inner cavity of the coring tube under the action of drilling pressure; however, since the rock core only relies on the static friction force with the inner wall of the coring tube to maintain the position, and due to the weight of the rock core, when the coring tube is lifted upward, the obtained rock core is easily slipped out of the coring tube and falls off; therefore, the existing technology has the problem that the rock core is easily slipped out of the coring tube and falls off when the coring tube is lifted. SUMMARY

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a drilling coring device, which solves the problem that the rock core is easily slipped out of the coring tube and falls off when the coring tube is lifted in the prior art.

[0004] The purpose of the utility model can be achieved by the following technical solutions:

[0005] A drilling coring device, comprising a coring tube and a rotating and pushing mechanism;

[0006] The coring tube is in the shape of a hollow pipe with one end open;

[0007] A plurality of rotating grooves are formed on the inner side wall of the coring tube, and the rotating grooves are coaxially arranged with the coring tube;

[0008] Coaxially arranged clamping strips are rotationally connected in the rotating grooves, and the side of the clamping strips close to the central axis of the coring tube is flush with the inner side wall of the coring tube;

[0009] A driving unit is arranged at the end of the coring tube away from the opening, each clamping strip is connected with the driving unit, and the driving unit is used to drive each clamping strip to rotate around its own axis;

[0010] The rotating and pushing mechanism is detachably connected with the end of the coring tube away from the opening, and the rotating and pushing mechanism is used to drive the coring tube to rotate and move along the direction of its own axis;

[0011] One end of each clamping strip is flush with the opening end of the coring tube, and the other end of each clamping strip is flush with the inner side surface of the end of the coring tube away from the opening;

[0012] A drill bit in the shape of a fixed ring is arranged at the opening end of the coring tube, and the drill bit is coaxially arranged with the coring tube;

[0013] The driving unit comprises a plurality of rotating shafts, the rotating shafts are opposite to and correspond to the number of the clamping strips, the rotating shafts are coaxially arranged with the corresponding clamping strips, the rotating shafts are fixed away from the drill bit end of the corresponding clamping strips, the rotating shafts extend away from the clamping strip end, and the rotating shafts are rotationally connected with the core tube;

[0014] The driving unit further comprises a plurality of synchronous pulleys, the synchronous pulleys are equal in number to the rotating shafts and correspond to the rotating shafts one by one, the synchronous pulleys are fixedly sleeved on the corresponding rotating shafts, annular synchronous toothed belts are sleeved between the synchronous pulleys, and any rotating shaft is connected with a first rotating motor away from the clamping strip end, and the first rotating motor is fixed on the core tube through a mounting seat;

[0015] The rotating groove is in a circular arc surface shape away from the center axis of the core tube, and the clamping strip away from the center axis of the core tube is attached to the rotating groove;

[0016] The outer side of the core tube away from the drill bit end is fixed with a connecting sleeve arranged coaxially, and the core tube is detachably connected with the rotary pushing mechanism through the connecting sleeve;

[0017] The rotary pushing mechanism comprises a guide rail arranged coaxially with the core tube, a sliding block is slidably connected to the guide rail, a lifting part is arranged in the guide rail, the lifting part is used for driving the sliding block to move along the axis direction of the guide rail, a second rotating motor is fixedly installed on the sliding block, and an output shaft of the second rotating motor is detachably connected with the connecting sleeve.

[0018] The nouns, conjunctions or adjective parts involved in the above technical solutions are explained as follows:

[0019] Rotational connection: refers to the relative rotation of two components, commonly used in the connection form of mechanical devices requiring rotational motion.

[0020] Detachable connection: refers to a connection mode that allows two or more components to be easily connected and separated when needed, so that they can be quickly and conveniently connected and detached.

[0021] The beneficial effects of the utility model are as follows:

[0022] 1. When drilling and coring, the clamping strips are all retracted in the rotating grooves, and the clamping strips close to the center axis of the core tube are flush with the inner side wall of the core tube; then the rotary digging mechanism is used to drive the core tube to rotate and axially feed, so that the open end of the core tube is cut into the stratum to form a rock core; when the rock core reaches a predetermined length in the core tube, the driving unit is started to drive the clamping strips to rotate synchronously around their own axes, so that the working surface of the clamping strip is deflected from the flush state with the inner wall of the core tube to the center axis direction, thereby realizing uniform envelope clamping of the rock core; then the rotary digging mechanism pulls up the core tube, the clamping state of the rock core is separated from the stratum at the bottom, and the coring operation is completed;

[0023] The cooperation of the rotary clamping strip, the rotating groove and the driving unit in the application ensures the integrity of the inner wall of the coring tube during drilling, ensures the effective entry of the core, forms clamping of the core periphery during the lifting of the drill pipe, facilitates the separation of the core bottom and the stratum, significantly improves the core recovery rate and integrity, and avoids the sliding of the internal core when the coring tube is lifted;

[0024] 2. The cooperation of the rotating shaft, the synchronous pulley, the annular synchronous toothed belt and the first rotating motor facilitates the synchronous driving of the rotation of each clamping strip, and further clamps the core in the coring tube. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0026] Fig. 1 is a whole structure schematic diagram of the present application;

[0027] Fig. 2 is a partial structure schematic diagram of the coring tube of the present application;

[0028] Fig. 3 is a partial structure schematic diagram of the rotating groove of the present application;

[0029] Fig. 4 is a partial structure schematic diagram of the clamping strip of the present application. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort fall within the protection scope of the present application.

[0031] Herein Figs. 1 to 4To describe an embodiment of a drilling coring device. Specifically, the drilling coring device is configured as a split structure, which has a coring pipe 100, a rotating pushing mechanism 200, a rotating groove 101, a clamping strip 300, and a driving unit 400, etc. In this application, through the cooperation design of the rotating clamping strip 300, the rotating groove 101 and the driving unit 400, the integrity of the inner wall of the coring pipe 100 during drilling is ensured, the effective entry of the core is ensured, and the clamping of the core around the side during the lifting of the core is formed, which facilitates the separation of the core bottom and the formation, significantly improves the core recovery rate and integrity, and avoids the sliding of the internal core when the coring pipe 100 is lifted.

[0032] Please refer to Figs. 1 to 4 A drilling coring device, comprising a coring pipe 100 and a rotating pushing mechanism 200;

[0033] The coring pipe 100 is in the shape of a hollow pipe column with one end open;

[0034] A plurality of rotating grooves 101 are arranged on the inner circumferential wall of the coring pipe 100, and the rotating grooves 101 are coaxially arranged with the coring pipe 100;

[0035] The rotating grooves 101 are coaxially arranged with the clamping strips 300, and the side of the clamping strips 300 close to the central axis of the coring pipe 100 is flush with the inner circumferential wall of the coring pipe 100;

[0036] The driving unit 400 is arranged at the end away from the opening of the coring pipe 100, each clamping strip 300 is connected with the driving unit 400, and the driving unit 400 is used for driving each clamping strip 300 to rotate around its own axis;

[0037] The rotating pushing mechanism 200 is detachably connected with the coring pipe 100 away from the opening, and the rotating pushing mechanism 200 is used for driving the coring pipe 100 to rotate and move along the axis direction of the coring pipe 100;

[0038] Since the side of the clamping strip 300 close to the central axis of the coring pipe 100 is flush with the inner circumferential wall of the coring pipe 100, when the clamping strip 300 is driven to rotate, the side of the clamping strip 300 will inevitably pass through the circular surface of the inner circumferential wall of the coring pipe 100 and approach the central axis end of the coring pipe 100;

[0039] When coring, the clamping strips 300 are all retracted in the rotating groove 101, the clamping strips 300 are flush with the inner wall of the coring tube 100 on the side close to the central axis of the coring tube 100; then the coring tube 100 is driven to rotate and axially feed by the rotating and pushing mechanism 200, so that the open end of the coring tube 100 cuts into the stratum to form a core; when the core reaches a predetermined length in the coring tube 100, the driving unit 400 is started to synchronously rotate the clamping strips 300 around their own axes, so that the working surface of the clamping strips 300 is deflected from the flush state with the inner wall of the coring tube 100 to the central axis direction, thereby realizing uniform envelope clamping of the core; then the coring tube 100 is pulled up by the rotating and pushing mechanism 200, the clamped core is separated from the stratum at the bottom, and the coring operation is completed.

[0040] In the present application, through the cooperation of the rotating clamping strips 300, the rotating groove 101 and the driving unit 400, the integrity of the inner wall of the coring tube 100 during drilling is ensured, the effective entry of the core is ensured, the clamping of the core around the side is formed when the coring tube 100 is pulled up, the separation of the core bottom from the stratum is facilitated, the core recovery rate and integrity are significantly improved, and the sliding of the internal core when the coring tube 100 is pulled up is avoided.

[0041] Preferably, the clamping strips 300 are arranged in multiple annular uniform distributions around the central axis of the coring tube 100.

[0042] One end of each clamping strip 300 is flush with the open end of the coring tube 100, and the other end of each clamping strip 300 is flush with the inner side of the coring tube 100 away from the open end; which can effectively ensure clamping of the core in the coring tube 100.

[0043] A drill bit 102 in the shape of a fixed ring is arranged at the open end of the coring tube 100, and the drill bit 102 is coaxially arranged with the coring tube 100; so as to facilitate rotary drilling of the coring tube 100.

[0044] The driving unit 400 includes multiple rotating shafts 401, the rotating shafts 401 are in one-to-one correspondence with the number of clamping strips 300, the rotating shafts 401 are coaxially arranged with the corresponding clamping strips 300, the rotating shafts 401 are fixed away from the end of the corresponding clamping strips 300, the rotating shafts 401 extend away from the end of the clamping strips 300, and the rotating shafts 401 are rotationally connected with the coring tube 100; by rotating the rotating shafts 401, the clamping strips 300 can be driven to rotate.

[0045] In order to facilitate synchronous driving each clamping strip 300 to rotate to clamp the rock core, the driving unit 400 further comprises a plurality of synchronous pulleys 402, the synchronous pulleys 402 are equal in number and one-to-one corresponding to the rotating shafts 401, the synchronous pulleys 402 are all fixedly sleeved on the corresponding rotating shafts 401, the annular synchronous toothed belts 403 are sleeved between each synchronous pulley 402, any rotating shaft 401 is connected with the first rotating motor 404 away from the clamping strip 300 end, the first rotating motor 404 is fixed through the mounting seat on the coring pipe 100; by starting the first rotating motor 404, the first rotating motor 404 drives the rotating shaft 401 connected with it to rotate, and drives each rotating shaft 401 to synchronously rotate through the synchronous pulleys 402 and the annular synchronous toothed belts 403, thereby achieving the purpose of controlling each clamping strip 300 to synchronously rotate.

[0046] The rotating groove 101 is arc-shaped away from the central axis of the coring pipe 100, and the clamping strip 300 is attached to the rotating groove 101 away from the central axis of the coring pipe 100; through the setting of the arc surface of the rotating groove 101 and the attachment of the clamping strip 300 to the rotating groove 101, the guiding property of the clamping strip 300 during rotation can be effectively improved, and at the same time, the clamping strip 300 can be prevented from being affected by the debris entering the rotating groove 101 during drilling.

[0047] The outer side of the coring pipe 100 away from the drill bit 102 is fixed with a coaxially placed connecting sleeve 103, and the coring pipe 100 is detachably connected with the rotating and pushing mechanism 200 through the connecting sleeve 103; so as to facilitate the disassembly or replacement of the coring pipe 100.

[0048] The rotating and pushing mechanism 200 comprises a guide rail 201 coaxially placed with the coring pipe 100, a sliding block 202 slidably connected on the guide rail 201, and a lifting part arranged inside the guide rail 201 and used for driving the sliding block 202 to move along the axis direction of the guide rail 201; a second rotating motor 203 is fixedly installed on the sliding block 202, and the output shaft of the second rotating motor 203 is detachably connected with the connecting sleeve 103.

[0049] Two different embodiments of the output shaft of the second rotating motor 203 and the connecting sleeve 103 are provided in the application:

[0050] Embodiment one: the output shaft of the second rotating motor 203 extends into the connecting sleeve 103, and the output shaft of the second rotating motor 203 and the connecting sleeve 103 are connected by bolts;

[0051] Embodiment two: a threaded tooth is arranged on the output shaft of the second rotating motor 203, a matching threaded groove is arranged on the inner circumferential wall of the connecting sleeve 103, and the output shaft of the second rotating motor 203 and the connecting sleeve 103 are threadedly connected.

[0052] Two different embodiments of the lifting part are provided in the application:

[0053] In the third embodiment, the lifting part comprises a screw rod and a guide rail 201, the screw rod is coaxially arranged in the guide rail 201, the screw rod passes through the sliding block 202 and is threadedly connected with the sliding block 202, and the guide rail 201 is provided with a driving motor for driving the screw rod to rotate;

[0054] In the fourth embodiment, the lifting part comprises a first hydraulic push rod arranged in the guide rail 201, the first hydraulic push rod is coaxially arranged in the guide rail 201, and the first hydraulic push rod is fixedly connected with the sliding block 202 at one end.

[0055] Preferably, the rotating and pushing mechanism 200 further comprises a base 204, the guide rail 201 is rotatably connected with the base 204, the guide rail 201 can rotate around the connecting part between the guide rail 201 and the base 204 in a vertical plane, the base 204 is provided with a second hydraulic push rod 205, the second hydraulic push rod 205 is rotatably connected with the base 204 at one end, and the second hydraulic push rod 205 is rotatably connected with the guide rail 201 at the other end; the push rod opens the second hydraulic push rod 205, so as to drive the guide rail 201 to rotate around the vertical plane for adjusting, so as to control the inclination angle of the guide rail 201; meanwhile, in the non-use state, the guide rail 201 can be driven to rotate to a horizontal placement state, so as to be folded and stored.

[0056] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A drilling coring device, comprising a coring tube (100) and a rotary pushing mechanism (200), characterized in that: the coring tube (100) is in the shape of a hollow pipe column with one end open; a plurality of rotating grooves (101) are arranged on the inner circumferential wall of the coring tube (100), and each rotating groove (101) is coaxially arranged with the coring tube (100); each rotating groove (101) is rotatably connected with a coaxially arranged clamping strip (300), and the side of the clamping strip (300) close to the central axis of the coring tube (100) is flush with the inner circumferential wall of the coring tube (100); a driving unit (400) is arranged at the end of the coring tube (100) away from the opening, each clamping strip (300) is connected with the driving unit (400), and the driving unit (400) is used to drive each clamping strip (300) to rotate around its own axis; the rotary pushing mechanism (200) is detachably connected with the end of the coring tube (100) away from the opening, and the rotary pushing mechanism (200) is used to drive the coring tube (100) to rotate and move along its own axis.

2. The coring device of claim 1, wherein, The one end of each clamping strip (300) is flush with the opening end of the coring tube (100), and the other end of each clamping strip (300) is flush with the inner side of the end of the coring tube (100) away from the opening.

3. The coring device of claim 2, wherein, A drill bit (102) in the shape of a fixed ring is arranged at the opening end of the coring tube (100), and the drill bit (102) is coaxially arranged with the coring tube (100).

4. The drill core taking apparatus according to claim 3, characterized by The driving unit (400) comprises a plurality of rotating shafts (401), the number of the rotating shafts (401) is equal to that of the clamping strips (300) and each rotating shaft (401) corresponds to one clamping strip (300), each rotating shaft (401) is coaxially arranged with the corresponding clamping strip (300), each rotating shaft (401) is fixed with the corresponding clamping strip (300) away from the drill bit (102), each rotating shaft (401) extends away from the clamping strip (300), and each rotating shaft (401) is rotatably connected with the coring tube (100).

5. The coring device of claim 4, wherein, The driving unit (400) further comprises a plurality of synchronous pulleys (402), the number of the synchronous pulleys (402) is equal to that of the rotating shafts (401) and each synchronous pulley (402) corresponds to one rotating shaft (401), each synchronous pulley (402) is fixedly sleeved on the corresponding rotating shaft (401), an annular synchronous toothed belt (403) is sleeved between each synchronous pulley (402), and a first rotating motor (404) is connected with any rotating shaft (401) away from the clamping strip (300), and the first rotating motor (404) is fixed on the coring tube (100) through a mounting seat.

6. The coring device of claim 5, wherein, The side of each rotating groove (101) away from the central axis of the coring tube (100) is in the shape of a circular arc surface, and the side of each clamping strip (300) away from the central axis of the coring tube (100) is attached to the rotating groove (101).

7. The drill core taking apparatus according to claim 6, characterized in that, A coaxially arranged connecting sleeve (103) is fixed on the outer side of the end of the coring tube (100) away from the drill bit (102), and the coring tube (100) is detachably connected with the rotary pushing mechanism (200) through the connecting sleeve (103).

8. The drill core taking apparatus according to claim 7, characterized by The rotating and pushing mechanism (200) comprises a guide rail (201) coaxially arranged with the coring pipe (100), a sliding block (202) slidably connected to the guide rail (201), a lifting part arranged in the guide rail (201) and used for driving the sliding block (202) to move along the axis direction of the guide rail (201), and a second rotating motor (203) fixedly installed on the sliding block (202), wherein an output shaft of the second rotating motor (203) is detachably connected with the connecting sleeve (103).

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