Foraminiferal fossil sample shell pre - cleaning treatment device and treatment method

Abstract

The present invention provides a pretreatment device and method for cleaning the shells of foraminiferal fossil samples, which relates to the technical field of specimen treatment methods. The pretreatment device for cleaning the shells of foraminiferal fossil samples includes an extraction tube, a flask is installed at the bottom of the extraction tube, a swivel joint is fixedly connected to the top of the extraction tube, a condenser is provided at the top of the swivel joint, the extraction tube and the condenser are fixedly connected through the swivel joint, a communication component is provided between the extraction tube and the flask, and a placement plate is provided inside the extraction tube. For this pretreatment device for cleaning the shells of foraminiferal fossil samples, the spring is compressed. When the limiting plate enters the inside of the support frame, the spring is used to squeeze the moving block, so that the limiting disc clamps the sample. Then, the placement plate with the sample is slid into the extraction tube through the connecting rod. When it is completed, the rotating handle can be directly lifted, and the rotating handle drives the connecting rod to take out the sample on the placement plate.

Description

Technical Field

[0001] The present invention relates to the treatment of the shell of a foraminiferal fossil sample, specifically a pretreatment device and method for cleaning the shell of a foraminiferal fossil sample, and belongs to the technical field of micropaleontological specimen treatment methods. Background Art

[0002] Foraminifera, as a recorder of geological environmental changes, has always been the main research object of paleoclimatology and paleoceanography. In addition to the identification of foraminiferal genera and species, the research on the ratios of elements (such as Mg, B, Sr, Ba, Li, U, etc.) to Ca in the foraminiferal shell, as well as the carbon and oxygen isotopes, boron isotopes, and calcium isotopes of the shell, is in the ascendant in the research on global climate change. Given that the foraminiferal shell is relatively small, mostly between 63 - 250 um in size, but the research on its community composition and the geochemical composition of the calcareous shell is of great significance for paleoenvironmental reconstruction. Therefore, it is particularly important to be able to better clean the shell of foraminiferal fossil samples for subsequent academic research.

[0003] The core geological samples obtained from drilling are mostly mixed with "oil-based mud" because oil-based drilling fluids are used during drilling. The basic composition of oil-based drilling fluids is oil, water, organic clay, and oil-soluble chemical treatment agents. They have high temperature resistance, resistance to salt and calcium erosion, are beneficial to wellbore stability, have good lubricity, and cause little damage to oil and gas layers, and are widely used in various drilling platforms.

[0004] This causes the geological samples to turn black and the cuttings to become compacted, bringing serious interference and influence to the subsequent microscopic analysis work of foraminifera. Therefore, all samples cannot be processed according to the conventional methods of micropaleontological research. First, the "deoiling" pretreatment work of the samples should be carried out. The existing treatment methods cannot perform the "deoiling" pretreatment work on the samples, and at the same time, the following problems exist in the use of the existing treatment devices:

[0005] After the sample is placed inside the treatment device for treatment, it is not convenient for the operator to take out the sample.

[0006] During the treatment process of the sample for the treatment device, stable fixation cannot be achieved, so that the treatment device cannot be kept stable and is not convenient to use. Summary of the Invention

[0007] The object of the present invention is to provide a pretreatment device and method for cleaning the shell of foraminiferal fossil samples to solve the above problems, so as to solve the problem that all samples in the prior art cannot be processed according to the conventional methods of micropaleontology research. First, the "degreasing" pretreatment work of the samples should be carried out. The existing treatment methods cannot perform the "degreasing" pretreatment work on the samples. At the same time, after the samples are placed inside the treatment device for treatment, it is not convenient for the operator to take out the samples; during the treatment process of the samples, the treatment device cannot be stably fixed, so that the treatment device cannot be kept stable and is not convenient to use.

[0008] Technical solution

[0009] To achieve the above object, the present invention is realized through the following technical solutions: A pretreatment device for cleaning the shell of foraminiferal fossil samples includes an extraction tube, a flask is installed at the bottom of the extraction tube, a connector is fixedly connected to the top of the extraction tube, a condenser is provided at the top of the connector, the extraction tube and the condenser are fixedly connected through the connector, a communication component is provided between the extraction tube and the flask, a placement plate is provided inside the extraction tube, support frames are fixedly connected to both sides of the top of the placement plate, a placement component is provided between the two support frames, two fixed circular plates are provided on the outside of the extraction tube, an adjustment component is provided between the two fixed circular plates, and multiple groups of fixing components for limiting the extraction tube and the condenser are provided on the tops of the two fixed circular plates.

[0010] Preferably, the communication component includes a steam pipe and a siphon pipe. The steam pipe and the siphon pipe are both fixedly connected to the outside of the extraction tube. One ends of the steam pipe and the siphon pipe extend into the flask, and both ends of the steam pipe and the siphon pipe are communicated with the extraction tube and the flask.

[0011] Preferably, a water outlet pipe and a water inlet pipe are sequentially arranged on the outside of the condenser from top to bottom. The water inlet pipe and the water outlet pipe are both communicated with the extraction tube, which is beneficial to the cooling water to enter through the water inlet pipe and exit through the water outlet pipe.

[0012] Preferably, the placement component includes a limiting disc. The limiting disc is arranged between the two support frames. Placement grooves are formed on one side of each of the two support frames, and sliding grooves are formed on the other side of each of the two support frames.

[0013] Preferably, the placing assembly further includes two limiting plates. Both of the two limiting plates are fixedly connected to the outside of the limiting disc, and are respectively arranged inside the two support frames and slidably connected to the support frames. Springs are fixedly connected inside the two support frames. The bottoms of the two springs are fixedly connected with moving blocks. One end of the moving block passes through the sliding groove and is slidably connected to the support frame. Connecting rods are fixedly connected to the tops of the two support frames. A rotating handle is rotatably connected between the two connecting rods. A handheld block is fixedly connected to the outside of the rotating handle, which is beneficial to conveniently place the sample into the extraction tube and facilitate taking out the sample after the treatment is completed.

[0014] Preferably, the fixing assembly includes a support plate. The support plate is fixedly connected to the top of the fixed circular plate. An internally threaded cylinder is arranged on one side of the support plate. The internally threaded cylinder penetrates through the support plate and is rotatably connected to the support plate. A threaded rod is threadedly connected inside the internally threaded cylinder. One end of the threaded rod is fixedly connected with a clamping plate.

[0015] Preferably, the fixing assembly further includes a rotating rod. The rotating rod penetrates through the fixed circular plate and is rotatably connected to the fixed circular plate. One end of the rotating rod is fixedly connected with a second bevel gear. A first bevel gear is meshed on the outside of the second bevel gear. The first bevel gear is fixedly connected with the internally threaded cylinder. One side of the clamping plate is fixedly connected with a telescopic rod. The telescopic rod is fixedly connected to the inner wall of the fixed circular plate, which is beneficial to clamp the extraction tube and the condensing tube through the clamping plate to keep the extraction tube and the condensing tube stable.

[0016] Preferably, transmission gears are fixedly connected to the bottoms of multiple rotating rods. Inner gear ring rings are rotatably connected to the bottoms of the two fixed circular plates. The two inner gear ring rings are respectively meshed with the multiple transmission gears on the two fixed circular plates. Fixed rods are fixedly connected to the bottoms of the two fixed circular plates. Pawls are arranged on the outside of the two fixed rods. The pawls are in contact with the inner gear ring rings. A torsion spring is fixedly connected between the fixed rod and the pawl, which is beneficial to drive the multiple transmission gears to rotate synchronously by the inner gear ring ring and clamp the extraction tube and the condensing tube by the clamping plate in the fixing assembly.

[0017] Preferably, the adjusting assembly includes a lead screw and a limiting rod. The lead screw is rotatably connected to one of the fixed circular plates. The lead screw penetrates through the other fixed circular plate and is connected to the other fixed circular plate through a ball screw pair. The limiting rod is fixedly connected to the top of one of the fixed circular plates. The limiting rod penetrates through the other fixed circular plate and is slidably connected to the other fixed circular plate. Multiple support legs are fixedly connected to the bottom of one of the fixed circular plates, which is beneficial to adjust the distance between the two fixed circular plates.

[0018] The treatment method for the shell of foraminiferal fossil samples before cleaning specifically includes the following steps:

[0019] S1. Wrap the core sample mixed with "oil-based mud" in filter paper and put it into the extraction tube. Pour 1 / 3 of the mixed solution of absolute ethanol and carbon tetrachloride into the flask. Connect the flask, extraction tube, and condenser hermetically from bottom to top.

[0020] S2. Turn on the condenser. Set the temperature of the water bath to 90 °C. Put the flask into the water bath to start the extraction process until the color of the extract in the extraction tube becomes clear.

[0021] S3. Place the degreased sample in a beaker. Ventilate it fully in the fume hood for 24 hours, then put it into the oven. After drying at a constant temperature of 60 °C, put it into a 1000 ml beaker, add an appropriate amount of water, boil for 2 hours. After the boiled sample cools, rinse it simply with a standard sieve with a pore size of 0.063 mm.

[0022] S4. Collect the part on the sieve into a beaker, add 30 g of sodium bicarbonate and an appropriate amount of water, then continue to boil for 2 hours, let it stand for 24 hours, and then rinse it with a standard sieve with a pore size of 0.063 mm. Collect the part on the sieve and put it into a 500 ml beaker, and soak it in a 10% hydrogen peroxide solution for 24 hours.

[0023] S5. After the soaking is completed, rinse it repeatedly with a standard sieve with a pore size of 0.063 mm. Finally, collect the part on the sieve and put it into the oven to dry at 60 °C for microscopic identification and statistics.

[0024] The present invention provides a pretreatment device and method for cleaning the shell of foraminiferal fossil samples, and the beneficial effects are as follows:

[0025] For the pretreatment device for cleaning the shell of foraminiferal fossil samples, placing grooves are provided on the outer sides of both support frames. By rotating the limit disc, the limit plate rotates into the interiors of the two support frames. And a spring is provided inside the support frame. Before the limit plate enters the interior of the support frame, by pulling the moving block, the spring is compressed. When the limit plate enters the interior of the support frame, the spring squeezes the moving block, so that the limit disc clamps the sample. Then, through the connecting rod, the placement plate with the sample is slid into the interior of the extraction tube. When it is completed, the rotating handle can be directly lifted, and the rotating handle drives the connecting rod to take out the sample on the placement plate.

[0026] The foraminifera fossil sample shell cleaning pretreatment device has a threaded rod connected to the inner thread of the inner threaded barrel due to the rotation of the internal threaded barrel and the support plate, and the threaded rod is fixedly connected to the clamping plate, and a telescopic rod is fixedly connected between the clamping plate and the fixed circular plate, so that when the internal threaded barrel rotates, the threaded rod pushes the clamping plate to move, so that the multiple clamping plates clamp the outside of the extraction tube to keep the extraction tube stable, and can adapt to extraction tubes of different sizes. At the same time, the ratchet on the outer side of the inner gear ring is pulled by the torsion spring to limit the inner gear ring. When disassembly is required, the ratchet can be turned.

[0027] The treatment method of the foraminifera fossil sample shell before cleaning is as follows: the extraction liquid vapor in the flask is cooled into liquid drops and dripped into the extraction tube, the extraction liquid and the rock cutting sample mixed with "oil-based mud" are fully contacted in the extraction tube and the oil-based drilling fluid components therein are extracted, and when the extraction liquid level in the extraction tube reaches the highest position of the siphon tube, the extraction liquid returns to the flask through the siphon tube. This process is repeated, and the oil-based drilling fluid components in the rock cutting sample are gradually enriched in the extraction liquid in the flask, thereby achieving efficient treatment of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a bottom view structural schematic diagram of the present invention;

[0030] Figure 3 This is a schematic diagram of the extraction tube structure of the present invention;

[0031] Figure 4 This is a schematic diagram of the cross-sectional structure of the extraction tube of the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the limiting disc of the present invention;

[0033] Figure 6 This is a schematic diagram of the support frame structure of the present invention;

[0034] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure of part A;

[0035] Figure 8 This is a schematic diagram of the fixed circular plate structure of the present invention;

[0036] Figure 9 It is a schematic diagram of the structure of the fixing assembly of the present invention;

[0037] Figure 10 For the present invention Figure 8 A schematic diagram of the enlarged structure of part B;

[0038] Figure 11 This is a schematic diagram of the lead screw structure of the present invention.

[0039] In the figure: 1, extraction tube; 2, condenser tube; 201, water inlet pipe; 202, water outlet pipe; 3, flask; 4, steam pipe; 5, siphon; 6, adapter; 7, fixed circular plate; 8, limit disc; 801, limit plate; 9, support frame; 901, placement groove; 902, sliding groove; 903, moving block; 10, connecting rod; 101, placement plate; 102, hand-held block; 11, turning handle; 12, spring; 13, lead screw; 14, limit rod; 15, support plate; 16, internal thread cylinder; 17, first bevel gear; 18, second bevel gear; 19, transmission gear; 20, threaded rod; 21, telescopic rod; 22, clamping plate; 23, internal gear ring; 24, rotating rod; 25, pawl; 26, fixed rod; 27, torsion spring; 28, support leg. Specific embodiments

[0040] The embodiment of the present invention provides a pretreatment device and method for cleaning the shell of foraminiferal fossil samples.

[0041] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 , including an extraction tube 1, a flask 3 is installed at the bottom of the extraction tube 1, a rotary joint 6 is fixedly connected to the top of the extraction tube 1, a condenser tube 2 is provided at the top of the rotary joint 6, the extraction tube 1 and the condenser tube 2 are fixedly connected through the rotary joint 6, a communication component is provided between the extraction tube 1 and the flask 3, a placement plate 101 is provided inside the extraction tube 1, support frames 9 are fixedly connected to both sides of the top of the placement plate 101, a placement component is provided between the two support frames 9, two fixed circular plates 7 are provided outside the extraction tube 1, an adjustment component is provided between the two fixed circular plates 7, and multiple groups of fixing components for limiting the extraction tube 1 and the condenser tube 2 are provided on the tops of the two fixed circular plates 7.

[0042] The communication component includes a steam pipe 4 and a siphon 5, the steam pipe 4 and the siphon 5 are both fixedly connected to the outside of the extraction tube 1, one ends of the steam pipe 4 and the siphon 5 extend into the flask 3, both ends of the steam pipe 4 and the siphon 5 are communicated with the extraction tube 1 and the flask 3, the water outlet pipe 202 and the water inlet pipe 201 are sequentially arranged from top to bottom on the outside of the condenser tube 2, and the water inlet pipe 201 and the water outlet pipe 202 are both communicated with the extraction tube 1, which is beneficial to the entry of cooling water through the water inlet pipe 201 and the discharge of cooling water from the water outlet pipe 202.

[0043] The placement component includes a limit disc 8, which is arranged between two support frames 9. A placement groove 901 is provided on one side of each of the two support frames 9, and a sliding groove 902 is provided on the other side of each of the two support frames 9. The placement component further includes two limit plates 801, both of which are fixedly connected to the outer side of the limit disc 8, are respectively arranged inside the two support frames 9 and are slidably connected to the support frames 9. Springs 12 are fixedly connected inside each of the two support frames 9. A moving block 903 is fixedly connected to the bottom of each of the two springs 12. One end of the moving block 903 passes through the sliding groove 902 and is slidably connected to the support frame 9. Connecting rods 10 are fixedly connected to the top of each of the two support frames 9. A rotating handle 11 is rotatably connected between the two connecting rods 10. A hand-held block 102 is fixedly connected to the outer side of the rotating handle 11, which is beneficial for conveniently placing the sample into the extraction tube 1 and facilitating the removal of the sample after the processing is completed.

[0044] Specifically, the flask 3, the extraction tube 1 and the condenser 2 are hermetically connected. The core sample mixed with "oil-based mud" is wrapped in filter paper and then placed into the extraction tube 1. By providing a placement plate 101 inside the extraction tube 1, the sample is placed on the top of the placement plate 101. The two limit plates 801 fixedly connected to the outer side of the limit disc 8 are respectively slid into the inside of the support frames 9 fixedly connected to both sides of the placement plate 101. Placement grooves 901 are provided on the outer side of each of the two support frames 9. By rotating the limit disc 8, the limit plates 801 are rotated into the inside of the two support frames 9. And springs 12 are provided inside the support frames 9. Before the limit plates 801 enter the inside of the support frames 9, by pulling the moving block 903, the springs 12 are compressed. When the limit plates 801 enter the inside of the support frames 9, the springs 12 squeeze the moving block 903, so that the limit disc 8 clamps the sample. Then, the placement plate 101 with the sample is slid into the extraction tube 1 through the connecting rod 10. When it is completed, the rotating handle 11 can be directly lifted, and the rotating handle 11 drives the connecting rod 10 to take out the sample on the placement plate 101.

[0045] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11, The fixing component includes a support plate 15. The support plate 15 is fixedly connected to the top of the fixed circular plate 7. One side of the support plate 15 is provided with an internally threaded cylinder 16. The internally threaded cylinder 16 penetrates through the support plate 15 and is rotatably connected to the support plate 15. A threaded rod 20 is threadedly connected inside the internally threaded cylinder 16. One end of the threaded rod 20 is fixedly connected to a clamping plate 22. The fixing component further includes a rotating rod 24. The rotating rod 24 penetrates through the fixed circular plate 7 and is rotatably connected to the fixed circular plate 7. One end of the rotating rod 24 is fixedly connected to a second bevel gear 18. A first bevel gear 17 is meshed and connected to the outside of the second bevel gear 18. The first bevel gear 17 is fixedly connected to the internally threaded cylinder 16. One side of the clamping plate 22 is fixedly connected to a telescopic rod 21. The telescopic rod 21 is fixedly connected to the inner wall of the fixed circular plate 7, which is beneficial to clamping the extraction tube 1 and the condensing tube 2 by the clamping plate 22 to keep the extraction tube 1 and the condensing tube 2 stable.

[0046] A transmission gear 19 is fixedly connected to the bottom of each of the plurality of rotating rods 24. An internal gear ring 23 is rotatably connected to the bottom of each of the two fixed circular plates 7. The two internal gear rings 23 are respectively meshed and connected to the plurality of transmission gears 19 on the two fixed circular plates 7. A fixed rod 26 is fixedly connected to the bottom of each of the two fixed circular plates 7. A pawl 25 is provided on the outside of each of the two fixed rods 26. The pawl 25 is in contact with the internal gear ring 23. A torsion spring 27 is fixedly connected between the fixed rod 26 and the pawl 25, which is beneficial to driving the plurality of transmission gears 19 to rotate synchronously by the internal gear ring 23, and clamping the extraction tube 1 and the condensing tube 2 by the clamping plate 22 in the fixing component. The adjusting component includes a lead screw 13 and a limiting rod 14. The lead screw 13 is rotatably connected to one of the fixed circular plates 7. The lead screw 13 penetrates through the other fixed circular plate 7 and is connected to the other fixed circular plate 7 through a ball screw pair. The limiting rod 14 is fixedly connected to the top of one of the fixed circular plates 7. The limiting rod 14 penetrates through the other fixed circular plate 7 and is slidably connected to the other fixed circular plate 7. A plurality of support legs 28 are fixedly connected to the bottom of one of the fixed circular plates 7, which is beneficial to adjusting the distance between the two fixed circular plates 7.

[0047] Specifically, by inserting the extraction tube 1 between two fixed circular plates 7, turning the internal gear ring 23, the internal gear ring 23 drives a plurality of meshed transmission gears 19 to rotate. When the transmission gears 19 rotate, they drive the fixedly connected rotating rod 24 to rotate. When the rotating rod 24 rotates, it drives the fixedly connected second bevel gear 18, and the first bevel gear 17 meshed on the outside of the second bevel gear 18, so that the first bevel gear 17 drives the internal thread cylinder 16 to rotate. Since the internal thread cylinder 16 rotates with the support plate 15, a threaded rod 20 is threadedly connected inside the internal thread cylinder 16, and the threaded rod 20 is fixedly connected to the clamping plate 22. An expansion rod 21 is fixedly connected between the clamping plate 22 and the fixed circular plate 7. Thus, when the internal thread cylinder 16 rotates, the threaded rod 20 pushes the clamping plate 22 to move, so that a plurality of clamping plates 22 clamp the outside of the extraction tube 1, keeping the extraction tube 1 stable, and can adapt to extraction tubes 1 of different sizes. At the same time, through the pawl 25 on the outside of the internal gear ring 23, the torsion spring 27 pulls the pawl 25 to limit the internal gear ring 23. When disassembly is required, just toggle the pawl 25.

[0048] At the same time, the operator can also rotate the lead screw 13. Since the lead screw 13 is connected to one of the fixed circular plates 7 through a ball screw pair, the distance between the two fixed circular plates 7 can be adjusted, so that the two fixed circular plates 7 can respectively clamp the extraction tube 1 and the condenser tube 2, making them more stable.

[0049] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11 , a method for treating foraminiferal fossil sample shells before cleaning, specifically including the following steps;

[0050] S1. Wrap the core sample mixed with "oil-based mud" in filter paper and put it into the extraction tube 1. Pour 1 / 3 of the mixed solution of anhydrous ethanol and carbon tetrachloride into the flask 3, and seal and connect the flask 3, the extraction tube 1, and the condenser tube 2 from bottom to top;

[0051] S2. Connect the condenser tube 2, set the temperature of the water bath to 90 °C, put the flask 3 into the water bath to start the extraction process until the color of the extraction liquid in the extraction tube is clear;

[0052] S3. Place the degreased sample in a beaker, ventilate it thoroughly in a fume hood for 24 hours, then put it into an oven. After drying at a constant temperature of 60 °C, transfer it to a 1000 ml beaker, add an appropriate amount of clear water, boil for 2 hours. After the boiled sample cools down, conduct a simple rinse using a standard sieve with a pore size of 0.063 mm.

[0053] S4. Collect the portion retained on the sieve into a beaker, add 30 g of sodium bicarbonate and an appropriate amount of clear water, then continue boiling for 2 hours, and let it stand for 24 hours. After that, conduct a rinse using a standard sieve with a pore size of 0.063 mm. Collect the portion retained on the sieve and place it into a 500 ml beaker, and soak it in a 10% hydrogen peroxide solution for 24 hours.

[0054] S5. After the soaking is completed, conduct repeated rinses again using a standard sieve with a pore size of 0.063 mm. Finally, collect the portion retained on the sieve and place it in an oven to dry at 60 °C for microscopic identification and statistics.

[0055] Specifically, the three main parts, namely the steam pipe 4, the siphon 5, and the extraction tube 1, are all connected with standard ground joints to ensure the airtightness of the experimental process and prevent the overflow of harmful gases. However, it should be noted that no vaseline is applied to the ground joint part to avoid secondary contamination of the sample.

[0056] The extraction liquid in the flask 3 volatilizes when heated and enters the flask 3 through the steam pipe 4. In the flask 3, the extraction liquid vapor cools into liquid drops and drips into the extraction tube 1. In the extraction tube 1, the extraction liquid comes into full contact with the cuttings sample mixed with "oil-based mud" and extracts the oil-based drilling fluid components therein. When the extraction liquid level in the extraction tube 1 reaches the highest position of the siphon 5, the extraction liquid returns to the flask 3 through the siphon 5. This process repeats continuously, and the oil-based drilling fluid components in the cuttings sample are gradually enriched in the extraction liquid in the flask 3, thus achieving efficient treatment of the sample.

[0057] The extraction liquid used in the experiment for removing "oil-based mud" is a 1:1 mixed solution of anhydrous ethanol and carbon tetrachloride. The mass fraction of anhydrous ethanol (CH 3 CH 2 OH) is ≥99.7%, and its density is 0.789 - 0.791 g / cm 3 (at 20 °C); the mass fraction of carbon tetrachloride (CCl 4 ) is ≥99.5%, and its density is 1.592 - 1.598 g / cm 3 (at 20 °C).

Claims

1. Pretreatment device for cleaning the shell of foraminiferal fossil samples, including an extraction tube (1), and a flask (3) is installed at the bottom of the extraction tube (1). Characterized in that: A swivel joint (6) is fixedly connected to the top of the extraction tube (1), a condenser tube (2) is provided at the top of the swivel joint (6), the extraction tube (1) and the condenser tube (2) are fixedly connected through the swivel joint (6), a communication component is provided between the extraction tube (1) and the flask (3), a placement plate (101) is provided inside the extraction tube (1), support frames (9) are fixedly connected to both sides of the top of the placement plate (101), a placement component is provided between the two support frames (9), two fixed circular plates (7) are provided on the outside of the extraction tube (1), an adjustment component is provided between the two fixed circular plates (7), and multiple groups of fixing components for limiting the extraction tube (1) and the condenser tube (2) are provided on the tops of the two fixed circular plates (7). The placement component includes a limit disc (8), the limit disc (8) is arranged between the two support frames (9), placement grooves (901) are formed on one side of each of the two support frames (9), sliding grooves (902) are formed on the other side of each of the two support frames (9). The placement component further includes two limit plates (801), the two limit plates (801) are fixedly connected to the outside of the limit disc (8) and are respectively arranged inside the two support frames (9) and are slidably connected to the support frames (9). Springs (12) are fixedly connected to the inside of the two support frames (9), moving blocks (903) are fixedly connected to the bottoms of the two springs (12), one end of each moving block (903) passes through the sliding groove (902) and is slidably connected to the support frame (9). Connecting rods (10) are fixedly connected to the tops of the two support frames (9), a rotating handle (11) is rotatably connected between the two connecting rods (10), a hand-held block (102) is fixedly connected to the outside of the rotating handle (11). The fixing component includes a support plate (15), the support plate (15) is fixedly connected to the top of the fixed circular plate (7), an internally threaded cylinder (16) is provided on one side of the support plate (15), the internally threaded cylinder (16) penetrates through the support plate (15) and is rotatably connected to the support plate (15), a threaded rod (20) is threadedly connected inside the internally threaded cylinder (16), a clamping plate (22) is fixedly connected to one end of the threaded rod (20). The fixing component further includes a rotating rod (24), the rotating rod (24) penetrates through the fixed circular plate (7) and is rotatably connected to the fixed circular plate (7), a second bevel gear (18) is fixedly connected to one end of the rotating rod (24), a first bevel gear (17) is meshed on the outside of the second bevel gear (18), the first bevel gear (17) is fixedly connected to the internally threaded cylinder (16), a telescopic rod (21) is fixedly connected to one side of the clamping plate (22), and the telescopic rod (21) is fixedly connected to the inner wall of the fixed circular plate (7).

2. The pretreatment device for cleaning the shell of foraminiferal fossil samples according to claim 1, Characterized in that: The connected components include a steam pipe (4) and a siphon pipe (5). Both the steam pipe (4) and the siphon pipe (5) are fixedly connected to the outside of the extraction pipe (1). One end of the steam pipe (4) and the siphon pipe (5) extends into the flask (3). Both ends of the steam pipe (4) and the siphon pipe (5) are communicated with the extraction pipe (1) and the flask (3).

3. The pretreatment device for the shell of a foraminiferal fossil sample before cleaning according to claim 1, characterized in that: An outlet water pipe (202) and an inlet water pipe (201) are successively arranged on the outside of the condenser pipe (2) from top to bottom. Both the inlet water pipe (201) and the outlet water pipe (202) are communicated with the extraction pipe (1).

4. The pretreatment device for the shell of a foraminiferal fossil sample before cleaning according to claim 1, characterized in that: Drive gears (19) are fixedly connected to the bottoms of a plurality of the rotating rods (24). Inner gear ring rings (23) are rotatably connected to the bottoms of two fixed circular plates (7). The two inner gear ring rings (23) are respectively meshed and connected with a plurality of drive gears (19) on the two fixed circular plates (7). Fixed rods (26) are fixedly connected to the bottoms of the two fixed circular plates (7). Pawls (25) are arranged on the outside of the two fixed rods (26). The pawls (25) are in contact with the inner gear ring rings (23). A torsion spring (27) is fixedly connected between the fixed rods (26) and the pawls (25).

5. The pretreatment device for the shell of a foraminiferal fossil sample before cleaning according to claim 1, characterized in that: The adjusting assembly includes a lead screw (13) and a limit rod (14). The lead screw (13) is rotatably connected to one of the fixed circular plates (7). The lead screw (13) penetrates through the other fixed circular plate (7) and is connected to the other fixed circular plate (7) through a ball screw pair. The limit rod (14) is fixedly connected to the top of one of the fixed circular plates (7). The limit rod (14) penetrates through the other fixed circular plate (7) and is slidably connected to the other fixed circular plate (7). A plurality of support legs (28) are fixedly connected to the bottom of one of the fixed circular plates (7).

6. A pretreatment method for the shell of a foraminiferal fossil sample before cleaning, applicable to the pretreatment device for the shell of a foraminiferal fossil sample before cleaning according to any one of claims 1-5, characterized in that: Specifically, it includes the following steps: S1. Wrap the core sample mixed with "oil-based mud" in filter paper and put it into the extraction pipe (1). Pour a mixed solution of 1 / 3 anhydrous ethanol and carbon tetrachloride into the flask (3). Seal and connect the flask (3), the extraction pipe (1), and the condenser pipe (2) from bottom to top; S2. Connect the condenser pipe (2), set the temperature of the water bath to 90 °C, put the flask (3) into the water bath to start the extraction process until the extraction liquid in the extraction pipe is clear in color; S3. Place the degreased sample in a beaker, fully ventilate it in a fume hood for 24 hours, then put it into an oven. After drying at a constant temperature of 60 °C, put it into a 1000 ml beaker, add an appropriate amount of clear water and boil for 2 hours. After the boiled sample cools, perform a simple rinse with a standard sieve with a pore size of 0.063 mm; S4. Collect the oversize fraction into a beaker, add 30 g of sodium bicarbonate and an appropriate amount of water, then continue boiling for 2 hours, let it stand for 24 hours, and then rinse it with a standard sieve with a pore size of 0.063 mm. Collect the oversize fraction and place it in a 500 ml beaker, and soak it in a 10% hydrogen peroxide solution for 24 hours; S5. After soaking, use a standard sieve with a pore size of 0.063 mm to rinse it repeatedly again. Finally, collect the oversize fraction and place it in an oven at 60 °C for drying for microscopic identification and statistics.

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