A core extraction device and a carbonate rock lithofacies paleogeography reconstruction method

Abstract

The invention discloses a core extraction device and a carbonate rock lithofacies paleogeography reconstruction method in the technical field of carbonate rock lithofacies paleogeography research, comprising: a placement plate on which a sampling tube can be placed; a core pushing mechanism which can move linearly along the placement plate to push the rock core in the sampling tube out of a tube body; a limiting mechanism which is installed on the placement plate and can abut against the rock core outlet end of the sampling tube to restrict the axial position of the sampling tube; after the coring of the sampling tube is completed, the sampling tube is placed on the placement plate, one end of the limiting mechanism abuts against the tail end of the sampling tube, and the core pushing mechanism moves from the head end to the tail end of the sampling tube to push the rock core in the sampling tube out of the sampling tube, thereby improving the convenience of taking out the rock core from the sampling tube, thereby improving the efficiency of carbonate rock lithofacies paleogeography reconstruction.

Description

Technical Field

[0001] The invention relates to the technical field of carbonate rock lithofacies paleogeography research, and in particular to a core extraction device and a carbonate rock lithofacies paleogeography reconstruction method. Background Art

[0002] The reconstruction of carbonate lithofacies paleogeography involves a variety of geological, geochemical and geophysical techniques. A combination of methods is needed to interpret information on paleobiogeography, marine environment, sedimentary structure and paleoclimate.

[0003] However, the above-mentioned technologies often have the following defects: when reconstructing the lithofacies paleogeography of carbonate rocks, it is necessary to collect information from many aspects, one of which is to collect cores. A drilling rig is needed to drill a sampling tube into the ground, and then the core will be collected in the sampling tube. However, the core will fit tightly to the inner wall of the sampling tube, making it inconvenient to take the core out of the sampling tube, thereby increasing the difficulty of reconstructing the lithofacies paleogeography of carbonate rocks. Summary of the invention

[0004] The purpose of the present invention is to provide a core extraction device and a carbonate rock lithofacies paleogeography reconstruction method to solve the technical problem in the prior art that the core will fit tightly to the inner wall of the sampling tube, making it inconvenient to remove the core from the sampling tube, which increases the difficulty of carbonate rock lithofacies paleogeography reconstruction.

[0005] In order to solve the above technical problems, the present invention specifically provides a core extraction device, comprising:

[0006] a placement plate on which the sampling tubes can be placed;

[0007] A core pushing mechanism, capable of moving linearly along the placement plate to push the core in the sampling tube out of the sampling tube body;

[0008] The limiting mechanism is installed on the placement plate and can interfere with the core outlet end of the sampling tube to restrict the axial position of the sampling tube.

[0009] As a preferred solution of the present invention, the core pushing mechanism includes a push rod assembly and a displacement assembly;

[0010] The displacement assembly is arranged in the slide groove on the upper end surface of the placement plate, and can drive the push rod assembly to move along the axial direction of the sampling tube to push the core out of the sampling tube.

[0011] As a preferred solution of the present invention, the displacement assembly includes a screw rod, a motor and a slider;

[0012] The screw rod is rotatably connected in the slide slot, and the motor is installed outside the end of the placement plate to drive the screw rod to rotate;

[0013] The slider is slidably arranged in the slide groove, and the slider is threadedly connected to the screw rod, and the push rod assembly is fixedly installed on the slider.

[0014] As a preferred solution of the present invention, the push rod assembly includes a push plate and a U-shaped push rod;

[0015] One side rod body of the push rod is located in the slide groove, and the end of the side rod body is fixedly connected to the sliding block; the other side rod body is located above the placement plate, and the end of the side rod body is fixedly connected to the push plate.

[0016] As a preferred solution of the present invention, a retractable tube body stabilizing assembly is installed on the back of the push plate, and both ends of the tube body stabilizing assembly can contact the inner wall of the sampling tubes of various diameters to keep the sampling tubes stable.

[0017] As a preferred solution of the present invention, the tube body stabilization assembly includes a connecting block, both ends of the connecting block are slidably connected with sliding columns, a positioning block is fixedly installed on one end of the sliding column away from the connecting block, and a third spring is sleeved outside the sliding column between the positioning block and the connecting block.

[0018] As a preferred solution of the present invention, a mounting groove is provided at one end of the positioning block away from the sliding column, and a roller is rotatably connected in the mounting groove.

[0019] As a preferred solution of the present invention, the top surface of the connection block is slidably connected to a lifting rod, the top surface of the lifting rod is fixedly connected to a baffle, and both ends of the baffle are bent toward the connection block;

[0020] When the push plate is located outside the sampling tube, the two ends of the baffle cover the positioning block so that the push plate can enter the sampling tube;

[0021] When the push plate is located in the sampling tube, two ends of the baffle are away from the positioning block, so that the roller can contact the inner wall of the sampling tube.

[0022] As a preferred solution of the present invention, the limiting mechanism includes a limiting plate, a sliding rod and a positioning assembly;

[0023] The placement plate is provided with a slide bar groove on one side of the core outlet end of the sampling tube, the slide bar is slidably arranged in the slide bar groove, and one end located outside the slide bar groove is fixedly connected to the limit plate;

[0024] The slide bar is provided with a plurality of positioning holes, the positioning assembly is mounted on the placement plate, and can be plugged into any one of the positioning holes to adjust the distance between the limiting plate and the end of the placement plate.

[0025] As a preferred solution of the present invention, a hollow elastic block is fixedly provided at one end of the slide groove close to the limiting mechanism, and the hollow elastic block is connected to the slide rod groove through a conduit;

[0026] The slide bar is sealingly and slidingly connected to the inner wall of the slide bar groove, and a first spring is fixedly arranged between the inner wall of the slide bar groove and the end of the slide bar.

[0027] As a preferred solution of the present invention, a support plate is fixedly connected above the placement plate, a take-up wheel is fixedly connected to the support plate, an impact ball is fixedly connected to the end of the connecting line on the take-up wheel, and a rocker is provided on one side of the take-up wheel.

[0028] The present invention further provides a carbonate rock lithofacies paleogeography reconstruction method based on multi-information, comprising the following steps:

[0029] Conduct field geological surveys in the study area, collect samples and record stratigraphic information, and make preliminary petrological and sedimentological observations of the rocks;

[0030] The drilling rig drills the sampling tube into the ground to take samples, and then uses the core extraction device to push out the core in the sampling tube;

[0031] Extract fossils from rock samples, identify and analyze them, and use paleontological information to infer the characteristics of ancient marine ecosystems;

[0032] Based on field investigations and core observations, a lithofacies model is established to describe the spatial distribution of rocks and stratigraphic sequences. The formation process of lithofacies is explained using petrographic methods to reveal the paleogeographic environment.

[0033] Conduct geophysical exploration to obtain underground structure and tectonic information, and analyze the underground distribution and structural characteristics of carbonate rocks in combination with geophysical data;

[0034] Carry out sedimentary dynamics simulation to simulate the sedimentary process and the evolution of sedimentary system in the ancient marine environment, and verify the rationality of the lithofacies model by numerical simulation and laboratory experiments;

[0035] All acquired data were integrated to form a comprehensive understanding of paleogeography, and paleogeographic maps were drawn using mapping tools to show the characteristics and evolution of carbonate lithofacies paleogeography.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] After coring is completed, the sampling tube is placed on a placement plate, one end of the limiting mechanism contacts the rear end of the sampling tube, and the core pushing mechanism moves from the head end to the rear end of the sampling tube to push the core in the sampling tube out of the sampling tube, thereby improving the convenience of taking the core out of the sampling tube and thus improving the efficiency of carbonate rock lithofacies paleogeography reconstruction. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0039] Figure 1 It is a structural schematic diagram of a core extraction device in an embodiment of the present invention;

[0040] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0041] Figure 3 It is a schematic diagram of the structure of the limiting mechanism and the displacement assembly in the embodiment of the present invention;

[0042] Figure 4 It is a schematic diagram of the structure of the push plate and the tube body stabilizing assembly at the back in an embodiment of the present invention;

[0043] Figure 5 It is a schematic diagram of the structure of the impact ball and the take-up wheel in an embodiment of the present invention.

[0044] The numbers in the figure represent the following:

[0045] 1-placing plate, 101-supporting plate, 102-retrieving wheel, 103-impact ball;

[0046] 2- Sampling tube;

[0047] 3-limiting mechanism, 301-limiting plate, 302-sliding rod, 303-sliding rod groove, 304-positioning hole, 305-hollow elastic block, 306-conduit, 307-first spring, 308-positioning rod, 309-circular ring, 3010-second spring, 3011-positioning plate, 3012-connecting plate;

[0048] 4-push rod assembly, 401-push plate, 402-push rod, 403-connecting block, 404-sliding column, 405-positioning block, 406-third spring, 407-roller, 408-lifting rod, 409-baffle,

[0049] 5-displacement assembly, 501-slideway, 502-screw rod, 503-motor, 504-slider. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] The present invention provides a core extraction device, comprising a placement plate 1 on which a sampling tube 2 can be placed;

[0052] The core pushing mechanism can move linearly along the placement plate 1 to push the core in the sampling tube 2 out of the sampling tube body;

[0053] The limiting mechanism 3 is installed on the placement plate 1 and can interfere with the core outlet end of the sampling tube 2 to restrict the axial position of the sampling tube 2 .

[0054] After coring is completed in the sampling tube 2, the sampling tube 2 is placed on the placement plate 1, one end of the limiting mechanism 3 contacts the rear end of the sampling tube 2, and the core pushing mechanism moves from the head end to the rear end of the sampling tube 2 to push the core in the sampling tube 2 out of the sampling tube 2, thereby improving the convenience of taking the core out of the sampling tube 2, thereby improving the efficiency of reconstructing the carbonate rock facies paleogeography.

[0055] Further, the core pushing mechanism includes a push rod assembly 4 and a displacement assembly 5;

[0056] The displacement assembly 5 is disposed in the slide groove 501 on the upper end surface of the placement plate 1 , and can drive the push rod assembly 4 to move along the axial direction of the sampling tube 2 to push the core out of the sampling tube 2 .

[0057] After the sampling tube 2 is placed on the placement plate 1 , the displacement assembly 5 drives the push rod assembly 4 to move from the head end to the tail end of the sampling tube 2 , and the push rod assembly 4 extends into the sampling tube 2 to push out the core in the sampling tube 2 .

[0058] The displacement component 5 is disposed in the slide groove 501 , so as to avoid interference between the displacement component 5 and the sampling tube 2 placed on the placement plate 1 when the displacement component 5 moves.

[0059] Further, the displacement assembly 5 includes a screw rod 502, a motor 503 and a slider 504;

[0060] The screw rod 502 is rotatably connected to the slide slot 501, and the motor 503 is installed outside the end of the placement plate 1 to drive the screw rod 502 to rotate;

[0061] The slider 504 is slidably disposed in the slide groove 501 , and the slider 504 is threadedly connected to the screw rod 502 , and the push rod assembly 4 is fixedly mounted on the slider 504 .

[0062] The motor 503 can drive the screw rod 502 to rotate, and utilize the principle of the screw rod 502 and the slider 504 to drive the slider 504 to slide in the slide groove 501, thereby achieving the purpose of moving the push rod assembly 4.

[0063] The screw rod 502 and the slider 504 are both hidden in the slide groove 501 and will not protrude from the surface of the placement plate 1 , thereby avoiding affecting the placement of the sampling tube 2 on the placement plate 1 .

[0064] Further, the push rod assembly 4 includes a push plate 401 and a U-shaped push rod 402;

[0065] One side of the push rod 402 is located in the slide groove 501 , and the end of the side rod is fixedly connected to the slider 504 ; the other side of the rod is located above the placement plate 1 , and the end of the side rod is fixedly connected to the push plate 401 .

[0066] The advantage of setting the push rod 402 to be U-shaped is that the connection between the upper rod body and the lower rod body is far away from the opening of the U shape. When pushing out the core in the sampling tube 2, the upper rod body can be fully extended into the sampling tube 2, that is, all the rod bodies are effective rod bodies.

[0067] The arrangement of the push plate 401 can increase the contact area with the core, and can push out the core as a whole, thereby avoiding the situation where part of the core is pushed out and part of the core remains in the sampling tube 2.

[0068] The specific shape of the push plate 401 is preferably set to be circular to adapt to the sampling tube 2.

[0069] Furthermore, since different sampling tubes 2 have different inner diameters, the sampling tubes 2 are prone to rolling when the pushing plate 401 pushes the core;

[0070] Therefore, the present invention installs a retractable tube body stabilizing component on the back of the push plate 401. Both ends of the tube body stabilizing component are retractable and can contact the inner wall of the sampling tube 2 of various diameters to keep the sampling tube 2 stable and prevent the sampling tube 2 from rolling.

[0071] Furthermore, the tube body stabilizing assembly includes a connecting block 403, both ends of which are slidably connected with sliding columns 404, one end of the sliding column 404 away from the connecting block 403 is fixedly installed with a positioning block 405, and a third spring 406 is sleeved between the positioning block 405 and the connecting block 403 outside the sliding column 404.

[0072] The positioning block 405 is slidably connected to the connecting block 403 through the sliding column 404. Under the elastic force of the third spring 406, the positioning block 405 can slide in the direction away from the connecting block 403; when the push plate 401 is located in the sampling tube 2, the positioning blocks 405 on both sides can resist the sampling tube 2 to prevent the sampling tube 2 from sliding during the process of pushing out the core.

[0073] The combination of the third spring 406 and the sliding column 404 can make the overall length of the tube body stabilizing assembly telescopic and adaptable to sampling tubes 2 of different diameters.

[0074] Furthermore, a mounting groove is provided at one end of the positioning block 405 away from the sliding column 404, and a roller 407 is rotatably connected in the mounting groove.

[0075] The setting of the roller 407 can convert the sliding friction between the positioning block 405 and the inner wall of the sampling tube 2 into rolling friction, thereby reducing the resistance of the push plate 401 when pushing the core.

[0076] Furthermore, due to the elastic force of the third spring 406, the positioning block 405 will be at the farthest position from the connecting block 403 without any restraint, and the length of the tube body stabilizing assembly is relatively long. When the push plate 401 enters the sampling tube 2, the third spring 406 needs to be compressed by hand, which may cause the positioning block 405 to pinch the wall of the sampling tube 2, and is inconvenient to operate.

[0077] To this end, a lifting rod 408 is slidably connected to the top surface of the connecting block 403, and a baffle 409 is fixedly connected to the top surface of the lifting rod 408, and both ends of the baffle 409 are bent toward the connecting block 403;

[0078] When the push plate 401 is located outside the sampling tube 2, both ends of the baffle 409 cover the positioning block 405, so that the push plate 401 can enter the sampling tube 2;

[0079] When the push plate 401 is located in the sampling tube 2 , both ends of the baffle 409 are away from the positioning block 405 , so that the roller 407 can contact the inner wall of the sampling tube 2 .

[0080] Furthermore, since the lengths of the sampling tubes 2 are different and the displacement range of the push plate 401 is not easy to adjust, in order to adapt to sampling tubes 2 of different lengths, the present invention sets the limiting mechanism 3 as follows:

[0081] The limiting mechanism 3 includes a limiting plate 301, a sliding rod 302 and a positioning assembly;

[0082] A slide bar groove 303 is provided on the side of the placement plate 1 where the core outlet end of the sampling tube 2 is located, and the slide bar 302 is slidably arranged in the slide bar groove 303, and one end located outside the slide bar groove 303 is fixedly connected to the limit plate 301;

[0083] A plurality of positioning holes 304 are provided on the slide bar 302 . The positioning assembly is installed on the placement plate 1 and can be plugged into any positioning hole 304 to adjust the distance between the limiting plate 301 and the end of the placement plate 1 .

[0084] That is, according to the length of the sampling tube 2, the limit plate 301 is pushed and pulled to make the slide bar 302 slide in the slide bar groove 303; after the limit plate 301 is moved to a suitable position, the positioning assembly is inserted into the positioning hole 304 to fix the position of the slide bar 302 and the limit plate 301, thereby achieving the purpose of adjusting the distance between the limit plate 301 and the end of the placement plate 1 to adapt to sampling tubes 2 of different lengths.

[0085] Furthermore, in order to make the adjustment of the limit plate 301 more automated and reduce the difficulty of adjustment, the present invention makes the following improvements to the relevant structure:

[0086] A hollow elastic block 305 is fixedly disposed at one end of the slide groove 501 close to the limiting mechanism 3, and the hollow elastic block 305 is connected to the slide rod groove 303 through a conduit 306;

[0087] The slide bar 302 is sealingly slidably connected to the inner wall of the slide bar groove 303 , and a first spring 307 is fixedly arranged between the inner wall of the slide bar groove 303 and the end of the slide bar 302 .

[0088] When it is necessary to move the limit plate 301 away from the placement plate 1 in order to place a longer sampling tube 2, the motor 503 drives the screw rod 502 to rotate, so that the slider 504 compresses the hollow elastic block 305, and compresses the air in the hollow elastic block 305 into the slide bar groove 303, thereby causing the slide bar 302 to slide outward, and the limit plate 301 moves in the direction away from the placement plate 1.

[0089] By controlling the moving distance of the slider 504 , the moving distance of the slide bar 302 and the limiting plate 301 can be controlled.

[0090] After the limiting plate 301 is moved to a suitable position, a positioning assembly is inserted into the positioning hole 304 to fix the position of the limiting plate 301 , and then the slider 504 can move the hollow elastic block 305 at will.

[0091] The purpose of providing the first spring 307 is that after the positioning assembly is pulled out of the positioning hole 304 , the first spring 307 can drive the slide bar 302 and the limit plate 301 to return to their original positions, so that the gas in the slide bar groove 303 returns to the hollow elastic block 305 .

[0092] The positioning assembly can be configured as a positioning rod 308. To facilitate the use of the positioning rod 308, the following optimization design is performed:

[0093] A circular ring 309 is fixedly connected to the surface of the positioning rod 308, and a second spring 3010 is fixedly connected between the circular ring 309 and the connecting plate 3012. The connecting plate is slidably connected to a positioning plate 3011 on the side away from the motor 503 to limit the circular ring 309. When the positioning rod 308 is pulled, the positioning plate 3011 can be slid downward to limit the circular ring 309. Then, when the positioning rod 308 needs to be plugged into the positioning hole 304, it is only necessary to slide the positioning plate 3011 upward so that it no longer contacts the circular ring 309. Then, the second spring 3010 will pull the circular ring 309, so that the positioning rod 308 can be engaged with the positioning hole 304, thereby facilitating the use of the positioning rod 308.

[0094] Furthermore, a support plate 101 is fixedly connected to the top surface of the placement plate 1, a take-up wheel 102 is fixedly connected to the support plate 101, a connecting line is fixedly connected to the take-up wheel 102, an impact ball 103 is fixedly connected to the other end of the connecting line, and a rocker arm is provided on one side of the take-up wheel 102; because the core needs to be broken after being pushed out of the sampling tube 2, the take-up wheel 102 can be released after the core comes out of the sampling tube 2 through the above mechanism, and the impact ball 103 will hit the core, thereby breaking the core, and then the take-up wheel 102 is rotated with the help of the rocker arm to make the impact ball 103 rise, and the effect of facilitating the breaking of the core is achieved through the above mechanism.

[0095] The present invention further provides a carbonate rock lithofacies paleogeography reconstruction method based on multi-information, comprising the following steps:

[0096] Conduct field geological surveys in the study area, collect samples and record stratigraphic information, and make preliminary petrological and sedimentological observations of rocks, including color, texture, grain size, etc.;

[0097] The drilling rig drills the sampling tube 2 into the ground, and then the rock core or rock sample is collected into the sampling tube 2. After the sampling is completed, the sampling tube 2 is placed on the placement plate 1, and then the rock core in the sampling tube 2 is pushed out with the help of the push plate 401;

[0098] Conduct detailed petrological analysis of the cores, conduct geochemical analysis, including isotope analysis and elemental composition, extract fossils from the rock samples, identify and analyze them, and use paleontological information to infer the characteristics of the ancient marine ecosystem, including water depth, temperature, nutritional status, etc.;

[0099] Based on field investigations and core observations, a lithofacies model is established to describe the spatial distribution of rocks and stratigraphic sequences. The formation process of lithofacies is explained using petrographic methods to reveal the paleogeographic environment.

[0100] Conduct geophysical exploration, such as seismic, geoelectric, and geomagnetic surveys, to obtain underground structure and tectonic information, and analyze the underground distribution and structural characteristics of carbonate rocks in combination with geophysical data;

[0101] Carry out sedimentary dynamics simulation to simulate the sedimentary process and the evolution of sedimentary system in the ancient marine environment, and verify the rationality of the lithofacies model by numerical simulation and laboratory experiments;

[0102] All acquired data were integrated to form a comprehensive understanding of paleogeography, and paleogeographic maps were drawn using mapping tools to show the characteristics and evolution of carbonate lithofacies paleogeography.

[0103] Working principle: the sampling tube 2 for sampling the core is placed on the placement plate 1, and the limiting plate 301 is used to contact and limit the port of the sampling tube 2, and then the motor 503 is started to rotate the screw rod 502, thereby driving the slide plate to move. At this time, the push plate 401 will enter the sampling tube 2 and push the core, thereby pushing the core out of the sampling tube 2, thereby improving the convenience of taking the core out of the sampling tube 2, thereby improving the efficiency of reconstructing the carbonate rock facies paleogeography.

[0104] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A core extraction device, characterized in that: include: A placement plate (1) on which a sampling tube (2) can be placed; A core pushing mechanism capable of moving linearly along the placement plate (1) to push the core in the sampling tube (2) out of the sampling tube body; A limiting mechanism (3) is installed on the placement plate (1) and is capable of coming into contact with the core outlet end of the sampling tube (2) to constrain the axial position of the sampling tube (2); The core pushing mechanism comprises a push rod assembly (4) and a displacement assembly (5); The displacement assembly (5) is arranged in a slide groove (501) on the upper end surface of the placement plate (1), and is capable of driving the push rod assembly (4) to move along the axial direction of the sampling tube (2) to push the core out of the sampling tube (2); The limiting mechanism (3) comprises a limiting plate (301), a sliding rod (302) and a positioning assembly; The placement plate (1) is provided with a slide bar groove (303) on one side where the core outlet end of the sampling tube (2) is located, the slide bar (302) is slidably arranged in the slide bar groove (303), and one end located outside the slide bar groove (303) is fixedly connected to the limit plate (301); The slide bar (302) is provided with a plurality of positioning holes (304); the positioning assembly is mounted on the placement plate (1) and can be plugged into any one of the positioning holes (304) to adjust the distance between the limit plate (301) and the end of the placement plate (1); A hollow elastic block (305) is fixedly arranged at one end of the slide groove (501) close to the limiting mechanism (3), and the hollow elastic block (305) is connected to the slide rod groove (303) through a conduit (306); The slide bar (302) is sealingly slidably connected to the inner wall of the slide bar groove (303), and a first spring (307) is fixedly arranged between the inner wall of the slide bar groove (303) and the end of the slide bar (302).

2. A core extraction device according to claim 1, characterized in that: The displacement assembly (5) comprises a screw rod (502), a motor (503) and a slider (504); The screw rod (502) is rotatably connected in the slide groove (501), and the motor (503) is installed outside the end of the placement plate (1) to drive the screw rod (502) to rotate; The slider (504) is slidably disposed in the slide groove (501), and the slider (504) is threadedly connected to the screw rod (502), and the push rod assembly (4) is fixedly mounted on the slider (504); The push rod assembly (4) comprises a push plate (401) and a U-shaped push rod (402); One side rod body of the push rod (402) is located in the slide groove (501), and the end of the side rod body is fixedly connected to the slider (504); the other side rod body is located above the placement plate (1), and the end of the side rod body is fixedly connected to the push plate (401).

3. A core extraction device according to claim 2, characterized in that: A retractable tube body stabilizing component is installed on the back of the push plate (401), and both ends of the tube body stabilizing component can contact the inner wall of the sampling tube (2) of various diameters to keep the sampling tube (2) stable.

4. A core extraction device according to claim 3, characterized in that: The tube body stabilizing assembly comprises a connecting block (403), both ends of the connecting block (403) are slidably connected with sliding columns (404), one end of the sliding column (404) away from the connecting block (403) is fixedly mounted with a positioning block (405), and a third spring (406) is sleeved between the positioning block (405) and the connecting block (403) outside the sliding column (404).

5. A core extraction device according to claim 4, characterized in that: An installation groove is provided at one end of the positioning block (405) away from the sliding column (404), and a roller (407) is rotatably connected in the installation groove.

6. A core extraction device according to claim 5, characterized in that: The top surface of the connection block (403) is slidably connected to a lifting rod (408), the top surface of the lifting rod (408) is fixedly connected to a baffle (409), and both ends of the baffle (409) are bent toward the connection block (403); When the push plate (401) is located outside the sampling tube (2), the two ends of the baffle (409) cover the positioning block (405) so that the push plate (401) can enter the sampling tube (2); When the push plate (401) is located in the sampling tube (2), the two ends of the baffle (409) are away from the positioning block (405), so that the roller (407) can contact the inner wall of the sampling tube (2).

7. A core extraction device according to claim 1, characterized in that: A support plate (101) is fixedly connected above the placement plate (1), a take-up wheel (102) is fixedly connected to the support plate (101), an impact ball (103) is fixedly connected to the end of the connecting line on the take-up wheel (102), and a rocker is provided on one side of the take-up wheel (102).

8. A carbonate lithofacies paleogeography reconstruction method based on multi-information, characterized in that: The following steps are involved: Conduct field geological surveys in the study area, collect samples and record stratigraphic information, and make preliminary petrological and sedimentological observations of the rocks; The drilling rig drills the sampling tube (2) into the ground to take samples, and then uses the core extraction device described in any one of claims 1 to 7 to push out the core in the sampling tube (2); Extract fossils from rock samples, identify and analyze them, and use paleontological information to infer the characteristics of ancient marine ecosystems; Based on field investigations and core observations, a lithofacies model is established to describe the spatial distribution of rocks and stratigraphic sequences. The formation process of lithofacies is explained using petrographic methods to reveal the paleogeographic environment. Conduct geophysical exploration to obtain underground structure and tectonic information, and analyze the underground distribution and structural characteristics of carbonate rocks in combination with geophysical data; Carry out sedimentary dynamics simulation to simulate the sedimentary process and the evolution of sedimentary system in the ancient marine environment, and verify the rationality of the lithofacies model by numerical simulation and laboratory experiments; All acquired data were integrated to form a comprehensive understanding of paleogeography, and paleogeographic maps were drawn using mapping tools to show the characteristics and evolution of carbonate lithofacies paleogeography.

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