Undisturbed deep-scale drilling sampling device for seabed sand settled layer

Abstract

The utility model relates to an undisturbed deep-scale drilling sampling device for a seabed sandy soil settled layer, which comprises a floral tube and a ship deck, and a sampling structure is arranged at the floral tube; the sampling structure comprises a rod-shaped heavy hammer arranged in the floral tube, a guide is arranged on the outer surface of a rod-shaped heavy hammer rod and fixedly installed on the inner wall of the floral tube through a fixing screw, a tube drainage hole is further formed in the side wall of the floral tube, and a sampling partition is installed on the inner wall of the middle end of the floral tube. According to the utility model, the rod-shaped heavy hammer performs drainage downward movement in the floral tube, strikes the sampling tube, repeatedly lowers the sampling equipment at the same hole site and continues to sample at the original hole site, in order to reduce sample disturbance or sample without disturbance as much as possible, the rod-shaped heavy hammer strikes 1-2 during sampling each time, the sampling length is controlled to be about 1m, and the sampling depth can reach 40m after the operation is repeated, so that the sampling efficiency is greatly improved. The device is extremely small in disturbance and large in sampling depth, and is an edge tool for marine sedimentology research.

Description

Technical Field

[0001] The utility model relates to the technical field of marine geological survey, in particular to a non-disturbance deep-scale drilling sampling device for seabed sand and soil sediment layers. Background Art

[0002] Gravity column samplers and vibration column samplers are generally used for sampling seabed sand and soil sediments. Gravity column sampling uses a counterweight on the top of the sampling tube to increase the weight of the equipment. The steel cable fixed on the top of the gravity sampling tube is connected to the winch through a pulley. The winch revolves to retract and release the gravity sampler. When sampling, the winch quickly releases the gravity sampler, and the gravity sampler moves downward in the water in a manner similar to free fall. The sampling tube is inserted into the seabed sand and soil sediment layer, and the winch is reversed to retract the gravity sampler, and the seabed sand and soil sediment layer sample is taken out from the sampling tube; vibration column sampling uses an electric vibrator installed on the top of the sampling tube. The sampling tube is The guiding equipment is connected to the bracket, the steel cable fixed on the top of the sampling tube is connected to the winch through a pulley, the vibrator cable is connected to the cable winch through another pulley and connected to the power supply on board. When sampling, the vibration gravity sampler is released by the winch, and the cable winch releases the cable synchronously. When the vibration gravity sampler bracket touches the seabed, the vibrator of the vibration gravity sampler is started, and the sampling tube is inserted into the seabed sand and soil sediment layer under the action of the vibrator. The winch is reversed, the sampler is recovered to the ship deck, and the seabed sand and soil sediment layer sample is taken out from the sampling tube.

[0003] The sampling length of the gravity column sampler currently used in the survey is short and is greatly affected by the nature of the seabed. The sampling length of muddy bottom is longer and the sampling length of sandy bottom is shorter. The sampling length of the vibration gravity column sampler is related to the power of the vibrator and the nature of the seabed. The sampling length of muddy bottom is longer and the sampling length of sandy bottom is shorter. In general, the sampling length is longer than that of the gravity column sampler, but the efficiency is lower than that of the gravity column sampler. In general, the sampling length of these two samplers is limited by the equipment itself. Its structure and working principle cannot achieve long-scale sampling without disturbance. The general sampling length is between 0.5-3m.

[0004] To this end, we proposed an undisturbed deep-scale drilling sampling device for seabed sandy sediments to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a device for undisturbed deep-scale drilling and sampling of seabed sand and soil sediments. When the device is used, a sampling structure and a metering structure are provided in the device. The rod-shaped heavy hammer is used to move downward in the flower tube to hit the sampling tube. Each time it is hit, the undisturbed sample can reach more than 1m. The sampling tube is recovered, the sample is taken out, and the sampling device is repeatedly placed in the same hole position to continue sampling at the original hole position. In order to minimize the disturbance of the sample or to sample without disturbance, the rod-shaped heavy hammer can hit 1-2 times each time the sample is sampled. The sampling length is controlled at about 1m. This reciprocating process can achieve a sampling depth of 40m. This device has extremely small disturbance and a large sampling depth, and is a powerful tool for marine sedimentology research to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A device for undisturbed deep-scale drilling and sampling of seabed sand and soil sediment layers comprises a flower tube and a ship deck, wherein a sampling structure is arranged at the flower tube, and a metering structure for assisting the sampling system when the sampling structure is used is installed at the ship deck; the sampling structure comprises a rod-shaped weight inside the flower tube, and a guide is arranged on the outer surface of the rod of the rod-shaped weight, the guide is fixedly mounted on the inner wall of the flower tube by fixing screws, and a pipe drainage hole is also arranged on the side wall of the flower tube, and a sampling baffle is installed on the inner wall of the middle end of the flower tube, a sampling drainage hole is arranged at the middle end of the sampling baffle, and a sampling tube is installed at the lower end of the flower tube, a PVC liner is arranged in the inner wall of the sampling tube, and petals are also arranged in the bottom end of the PVC liner, and spring pieces are arranged on the inner side of the petals, and a knife edge is also installed at the lower end of the sampling tube.

[0008] In a further embodiment, the metering structure includes a derrick arranged on the ship deck, and a load-bearing beam is installed at the upper end of the derrick, a fixed cable is installed at the middle end of the load-bearing beam, a bracket is installed at the lower end of the fixed cable, and a Hall sensor is also arranged on the inner wall of the bracket, and a rotating shaft is arranged on both sides of the inner wall of the lower end of the bracket, and nuts 2 are arranged on both sides of the rotating shaft, and a meter pulley is installed at the middle end of the rotating shaft, and a strong magnetic buckle is installed on the outer wall of the meter pulley, and a connecting wire is arranged at the bottom end of the Hall sensor, and the other end of the connecting wire is respectively connected to the display power supply and the controller.

[0009] In a further embodiment, a connecting thread 1 is provided on the outer wall of the bottom end of the sampling tube, and a connecting thread 2 is provided on the inner wall of the blade, and the sampling tube and the blade are threadably connected through the connecting thread 1 and the connecting thread 2, and a spacer 1 is also provided at the lower end of the blade.

[0010] In a further embodiment, a casing is provided at the lower end of the derrick, and the flower pipe is movably inserted into the casing, and a wellbore is also provided at the outer wall of the casing, and the wellbore is installed on the ship deck.

[0011] In a further embodiment, a screw hole is provided on the inner wall of the upper end of the flower tube, and a fixing screw is installed in the screw hole.

[0012] In a further embodiment, a connecting thread three is provided at the bottom end of the flower tube, and a connecting thread ring is provided at the upper end of the sampling tube, and the connecting thread ring is threadably connected to the connecting thread three.

[0013] In a further embodiment, a steel cable is installed in the inner wall of the meter pulley, one end of the steel cable is connected to a rod-shaped weight, and a winch is provided at the other end.

[0014] In a further embodiment, nuts 1 are provided on both sides of the Hall sensor, and the Hall sensor is mounted on the bracket through the nuts 1.

[0015] In a further embodiment, a switch and a setting button are respectively provided on the controller.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model, when using the undisturbed deep-scale drilling sampling device for the seabed sand and soil sediment layer, is provided with a sampling structure and a metering structure, and the rod-shaped heavy hammer is provided to move downward in the flower tube to discharge water and hit the sampling tube, and each time it hits, the undisturbed sample can reach more than 1m, the sampling tube is recovered, the sample is taken out, the sampling device is repeatedly placed in the same hole position, and the sampling is continued at the original hole position. In order to minimize the disturbance of the sample or the undisturbed sampling, the rod-shaped heavy hammer can hit 1-2 times each time the sampling is performed, and the sampling length is controlled to be about 1m, and the sampling depth can reach 40m by repeating this process. This makes the device extremely small in disturbance and large in sampling depth, and is a powerful tool for marine sedimentology research. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an undisturbed deep-scale drilling sampling device for seabed sand and soil sediment layers;

[0019] Figure 2 It is a schematic diagram of the structure of a meter pulley of a device for undisturbed deep-scale drilling and sampling of seabed sand and soil sediments;

[0020] Figure 3 It is a schematic diagram of the structure of the flower pipe of a device for undisturbed deep-scale drilling and sampling of seabed sand and soil sediments;

[0021] Figure 4The present invention is a schematic diagram of the structure of the parts at the flower tube of an undisturbed deep-scale drilling sampling device for seabed sand and soil sediment layers.

[0022] In the figure: 1. flower tube; 2. rod-shaped weight; 3. guide; 4. fixing screw; 5. pipe drainage hole; 6. sampling spacer; 7. sampling drainage hole; 8. sampling tube; 9. PVC liner; 10. knife edge; 11. petal; 12. shrapnel; 13. steel cable; 14. meter pulley; 15. connecting thread one; 16. connecting thread two; 17. spacer one; 18. casing; 19. screw hole; 20. connecting thread three; 21. connecting thread ring; 22. strong magnetic buckle; 23. derrick; 24. winch; 25. Hall sensor; 26. connecting line; 27. display power supply; 28. controller; 29. ​​ship deck; 30. nut one; 31. bracket; 32. fixing cable; 33. load-bearing beam; 34. rotating shaft; 35. nut two; 36. switch; 37. setting button; 38. wellbore. DETAILED DESCRIPTION

[0023] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-4 , a non-disturbance deep-scale drilling sampling device for seabed sand and soil sediment layer, comprising a flower tube 1 and a ship deck 29, and three parts are arranged on the ship deck 29, wherein the first part is a working platform, the drilling ship deck 29 is used as the working platform, and the drilling ship is fixed by four large gripping anchors to ensure that the ship does not shift during operation;

[0027] The second part is the metering structure, which can also be called the display system. The meter pulley 14 rotates under the action of the connecting equipment steel cable 13. Several strong magnetic buckles 22 are evenly embedded along a circle on the pulley. The arc length between the two magnetic buckles is 5cm (the shorter the arc length between the two magnetic buckles, the higher the accuracy of calculating the footage. Generally, 5cm meets the requirement). A Hall sensor 25 is installed on the pulley bracket 31 to correspond to the strong magnetic buckle 22. When the pulley rotates, the strong magnetic buckle 22 passes through the sensing surface of the Hall sensor 25. The Hall sensor 25 will generate an electric pulse under the magnetic induction of the strong magnetic buckle 22. The display has the function of receiving electric pulses. The arc length between two adjacent pulses is set by setting the button 37, and the positive step length of the forward rotation and the negative step length of the reverse rotation are further set. Finally, the display calculates the length of the cable lowering and recovery by the number of pulses received, and then automatically calculates the sampling footage depth and displays it on the display in real time. Since the Hall sensor 25 is waterproof, the meter counting system is not affected by weather, humidity and rainy days, and is durable.

[0028] The third part is the sampling structure, which can also be called the sampling system: it consists of the sampling tube 8, the flower tube 1, the rod-shaped weight 2, the knife edge 10, the petals 11, the PVC liner 9 and the sleeve 18. The sleeve 18 plays the role of positioning the hole position and preventing the hole wall from collapsing; the rod-shaped weight 2 performs drainage movement in the flower tube 1 and hits the sampling tube 8; the knife edge 10 plays the role of cutting the seabed sediment layer, and the petals 11 play the role of stopping the sample entering the sampling tube 8; the PVC liner 9 is used to encapsulate the sample, and the sampling tube 8 is installed on the connecting thread 3 20 of the flower tube 1 through the connecting thread ring 21, so that it is easy to remove and install.

[0029] The working platform is a ship deck 29, on which a derrick 23 is installed. A wellbore 38 is left just below the derrick 23 on the ship deck 29, from which a casing 18 is lowered into water. The casing 18 is connected in sections, with the bottom end touching the seabed and the upper end slightly higher than the ship deck 29.

[0030] Assemble the sampling equipment, insert the PVC liner 9 into the sampling tube 8, insert the petals 11 into the blade 10, and the blade 10 and petals 11 are separated by a gap 17, and then screw the blade 10 onto the sampling tube 8; insert the rod-shaped weight 2 into the flower tube 1, fix the guide 3 on the screw hole 19 at the top of the flower tube 1 through the fixing screw 4, the top of the rod-shaped weight 2 is connected to the steel cable 13, and the other end of the steel cable 13 is connected to the winch 24 through the meter pulley 14, the bracket 31 is fixed to the load-bearing crossbeam 33 of the derrick 23 through the fixing cable 32, and the rotating shaft 34 set on the bracket 31 through the nut 35 is connected to the meter pulley 14.

[0031] The strong magnetic buckles 22 are evenly embedded on the side outer side of the meter pulley 14 along a circumference, and the arc length between two adjacent strong magnetic buckles 22 is 5 cm. The Hall sensor 25 is fixed to the bracket 31 by fixing the Hall sensor 25 nut 30, so that the magnetic sensing end of the Hall sensor 25 is facing the strong magnetic buckle 22 on the meter pulley 14, and the connecting line 26 of the Hall sensor 25 is connected to the display controller 28 and the display power supply 27.

[0032] Through GPS navigation positioning, the ship is stopped and anchored at the designed position, and the casing 18 is lowered by the winch 24 so that the bottom end of the casing 18 touches the seabed and the upper end is slightly higher than the ship deck 29. The casing 18 plays a role in hole positioning, and then the sampling equipment is lowered in the casing 18 by the winch 24. When the sampling tube 8 touches the bottom in the casing 18, the winch 24 is quickly started to release the rod-shaped weight 2. The rod-shaped weight 2 is quickly drained in the flower tube 1 under the action of its own gravity. The water in the flower tube 1 is discharged from the drainage hole 5 of the flower tube 1. The rod-shaped weight 2 hits the flower tube 1 and the sampling partition 6 under the action of its own gravity, and in the sampling partition 6 A sampling drainage hole 7 is provided at the end for drainage. Under the impact force of the rod-shaped heavy hammer 2, the sampling tube 8 is inserted into the seabed sand and soil sediment layer, and the sample enters the PVC liner 9. The winch 24 reverses, and the sampling equipment is pulled up. The petals 11 prevent the sample from sliding out of the PVC liner 9, and a shrapnel 12 is provided on the inner side of the petals 11 to assist in sliding. The sampling equipment is lifted to the ship deck 29, the blade 10 is unscrewed, and the PVC liner 9 is taken out from the sampling tube 8. The sampling tube 8 and the blade 10 are threadedly connected through the connecting thread 1 15 and the connecting thread 2 16, which is convenient for removal, marking, packaging, and sending to the laboratory for testing and analysis.

[0033] During operation, under the action of the steel cable 13, the meter-counting pulley 14 rotates, and when the strong magnetic buckle 22 on the side of the meter-counting pulley 14 passes the sensing surface of the Hall sensor 25, the Hall sensor 25 generates an electric pulse, and the display controller 28 receives the electric pulse generated by the Hall sensor 25. The length between two adjacent pulses is set to 5 cm by setting the button 37 on the display controller 28 (consistent with the arc length of two adjacent strong magnetic buckles 22 on the side of the meter-counting pulley 14 being 5 cm), and the forward rotation step length of the meter-counting pulley 14 is set to +5 cm and the reverse rotation step length is set to -5 cm by setting the button 37 on the display controller 28 (determined according to the actual arc length between the two strong magnetic buckles 22. If the sampling length accuracy requirement is high, it can be solved by inlaying more strong magnetic buckles 22 on the meter-counting pulley 14, that is, shortening the arc length between the two adjacent strong magnetic buckles 22). The display controller 28 calculates the length of the retracted and released steel cable 13 by receiving the number of pulses from the Hall sensor 25, and a switch 36 and a setting button 37 are respectively provided on the controller 28 to determine the sampling length.

[0034] The working principle of the utility model is as follows: as shown in the figure, the working platform is a ship deck 29, a derrick 23 is installed on the ship deck 29, a well hole 38 is left just below the derrick 23 on the ship deck 29, a casing 18 is put into water from the well hole 38, and the casing 18 is connected in sections, with the bottom end touching the seabed and the upper end slightly higher than the ship deck 29.

[0035] Assemble the sampling equipment, insert the PVC liner 9 into the sampling tube 8, insert the petals 11 into the blade 10, and the blade 10 and petals 11 are separated by a gap 17, and then screw the blade 10 onto the sampling tube 8; insert the rod-shaped weight 2 into the flower tube 1, fix the guide 3 on the screw hole 19 at the top of the flower tube 1 through the fixing screw 4, the top of the rod-shaped weight 2 is connected to the steel cable 13, and the other end of the steel cable 13 is connected to the winch 24 through the meter pulley 14, the bracket 31 is fixed to the load-bearing crossbeam 33 of the derrick 23 through the fixing cable 32, and the rotating shaft 34 set on the bracket 31 through the nut 35 is connected to the meter pulley 14.

[0036] The strong magnetic buckles 22 are evenly embedded on the side outer side of the meter pulley 14 along a circumference, and the arc length between two adjacent strong magnetic buckles 22 is 5 cm. The Hall sensor 25 is fixed to the bracket 31 by fixing the Hall sensor 25 nut 30, so that the magnetic sensing end of the Hall sensor 25 is facing the strong magnetic buckle 22 on the meter pulley 14, and the connecting line 26 of the Hall sensor 25 is connected to the display controller 28 and the display power supply 27.

[0037] Through GPS navigation positioning, the ship is stopped and anchored at the designed position, and the casing 18 is lowered by the winch 24 so that the bottom end of the casing 18 touches the seabed and the upper end is slightly higher than the ship deck 29. The casing 18 plays a role in hole positioning, and then the sampling equipment is lowered in the casing 18 by the winch 24. When the sampling tube 8 touches the bottom in the casing 18, the winch 24 is quickly started to release the rod-shaped weight 2. The rod-shaped weight 2 is quickly drained in the flower tube 1 under the action of its own gravity. The water in the flower tube 1 is discharged from the drainage hole 5 of the flower tube 1. The rod-shaped weight 2 hits the flower tube 1 and the sampling partition 6 under the action of its own gravity, and in the sampling partition 6 A sampling drainage hole 7 is provided at the end for drainage. Under the impact force of the rod-shaped heavy hammer 2, the sampling tube 8 is inserted into the seabed sand and soil sediment layer, and the sample enters the PVC liner 9. The winch 24 reverses, and the sampling equipment is pulled up. The petals 11 prevent the sample from sliding out of the PVC liner 9, and a shrapnel 12 is provided on the inner side of the petals 11 to assist in sliding. The sampling equipment is lifted to the ship deck 29, the blade 10 is unscrewed, and the PVC liner 9 is taken out from the sampling tube 8. The sampling tube 8 and the blade 10 are threadedly connected through the connecting thread 1 15 and the connecting thread 2 16, which is convenient for removal, marking, packaging, and sending to the laboratory for testing and analysis.

[0038] During operation, under the action of the steel cable 13, the meter-counting pulley 14 rotates, and when the strong magnetic buckle 22 on the side of the meter-counting pulley 14 passes the sensing surface of the Hall sensor 25, the Hall sensor 25 generates an electric pulse, and the display controller 28 receives the electric pulse generated by the Hall sensor 25. The length between two adjacent pulses is set to 5 cm by setting the button 37 on the display controller 28 (consistent with the arc length of two adjacent strong magnetic buckles 22 on the side of the meter-counting pulley 14 being 5 cm), and the forward rotation step length of the meter-counting pulley 14 is set to +5 cm and the reverse rotation step length is set to -5 cm by setting the button 37 on the display controller 28 (determined according to the actual arc length between the two strong magnetic buckles 22. If the sampling length accuracy requirement is high, it can be solved by inlaying more strong magnetic buckles 22 on the meter-counting pulley 14, that is, shortening the arc length between the two adjacent strong magnetic buckles 22). The display controller 28 calculates the length of the retracted and released steel cable 13 by receiving the number of pulses from the Hall sensor 25, and a switch 36 and a setting button 37 are respectively provided on the controller 28 to determine the sampling length.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for undisturbed deep-scale drilling and sampling of seabed sand and soil sediments, characterized in that: It comprises a flower tube (1) and a ship deck (29), wherein a sampling structure is arranged at the flower tube (1), and a metering structure is installed at the ship deck (29) to assist the sampling system when the sampling structure is used; The sampling structure comprises a rod-shaped weight (2) inside the flower tube (1), and a guide (3) is arranged on the outer surface of the rod of the rod-shaped weight (2), and the guide (3) is fixedly installed on the inner wall of the flower tube (1) by means of a fixing screw (4), and a pipe drainage hole (5) is also arranged on the side wall of the flower tube (1), and a sampling baffle (6) is installed on the inner wall of the middle end of the flower tube (1), and a sampling drainage hole (7) is arranged at the middle end of the sampling baffle (6), and a sampling tube (8) is installed at the lower end of the flower tube (1), and a PVC liner (9) is arranged in the inner wall of the sampling tube (8), and a petal (11) is also arranged inside the bottom end of the PVC liner (9), and a spring piece (12) is arranged on the inner side of the petal (11), and a knife edge (10) is also installed at the lower end of the sampling tube (8).

2. According to claim 1, a device for undisturbed deep-scale drilling and sampling of seabed sand and soil sediment layers, characterized in that: The metering structure comprises a derrick (23) arranged on a ship deck (29), a load-bearing crossbeam (33) is installed at the upper end of the derrick (23), a fixing cable (32) is installed at the middle end of the load-bearing crossbeam (33), a bracket (31) is installed at the lower end of the fixing cable (32), a Hall sensor (25) is also arranged on the inner wall of the bracket (31), a rotating shaft (34) is arranged on both sides of the inner wall of the lower end of the bracket (31), nuts (35) are arranged on both sides of the rotating shaft (34), a meter pulley (14) is installed at the middle end of the rotating shaft (34), and a strong magnetic buckle (22) is installed on the outer wall of the meter pulley (14), a connecting line (26) is arranged at the bottom end of the Hall sensor (25), and the other end of the connecting line (26) is respectively connected to a display power supply (27) and a controller (28).

3. The undisturbed deep-scale drilling sampling device for seabed sand and soil sediment layer according to claim 1, characterized in that: A connecting thread 1 (15) is provided on the outer wall of the bottom end of the sampling tube (8), and a connecting thread 2 (16) is provided on the inner wall of the blade (10), and the sampling tube (8) and the blade (10) are threadedly connected via the connecting thread 1 (15) and the connecting thread 2 (16), and a spacer 1 (17) is also provided at the lower end of the blade (10).

4. The undisturbed deep-scale drilling sampling device for seabed sand and soil sediment layer according to claim 2, characterized in that: A casing (18) is provided at the lower end of the derrick (23), and the flower pipe (1) is movably inserted into the casing (18). A wellbore (38) is also provided on the outer wall of the casing (18), and the wellbore (38) is installed on the ship deck (29).

5. The undisturbed deep-scale drilling sampling device for seabed sand and soil sediment layer according to claim 4, characterized in that: A screw hole (19) is also provided on the inner wall of the upper end of the flower tube (1), and a fixing screw (4) is installed in the screw hole (19).

6. The undisturbed deep-scale drilling sampling device for seabed sand and soil sediment layer according to claim 1, characterized in that: The bottom end of the flower tube (1) is provided with a connecting thread three (20), and the upper end of the sampling tube (8) is provided with a connecting thread ring (21), and the connecting thread ring (21) is threadedly connected to the connecting thread three (20).

7. The undisturbed deep-scale drilling sampling device for seabed sand and soil sediment layer according to claim 2, characterized in that: A steel cable (13) is installed in the inner wall of the meter pulley (14), one end of the steel cable (13) is connected to the rod-shaped weight (2), and the other end is provided with a winch (24).

8. The undisturbed deep-scale drilling sampling device for seabed sand and soil sediment layer according to claim 2, characterized in that: Nuts (30) are provided on both sides of the Hall sensor (25), and the Hall sensor (25) is mounted on the bracket (31) through the nuts (30).

9. The undisturbed deep-scale drilling sampling device for seabed sand and soil sediment layer according to claim 2, characterized in that: The controller (28) is respectively provided with a switch (36) and a setting button (37).

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