Soil sampler, drilling rig and use method

Abstract

The present invention relates to the field of engineering survey technology, and in particular to a soil sampler, a drilling rig, and a method for using the soil sampler. A soil sampler comprises: a shell assembly, wherein the shell assembly is provided with a through hole, and a through hole provided on the outer wall of the shell assembly; a cutting assembly, wherein the cutting assembly comprises a steel coil and a cable, wherein the steel coil is provided at the bottom of the inner wall of the through hole, the cable is provided through the cable hole, one end of the cable is connected to the steel coil, and the other end extends out of the cable hole. The technical problem to be solved by the present invention is to overcome the defect in the prior art that when the soil sampler is stretched upward, the soil sample in the soil sampler is easily broken due to the connection with the external soil sample, which reduces the soil sample acquisition rate, thereby providing a soil sampler, a drilling rig, and a method for using the soil sampler.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering investigation, and in particular to an earth-sampling device, a drilling rig and a use method thereof. Background Art

[0002] During engineering surveys, drilling and sampling are used to obtain high-quality, undisturbed soil samples for geotechnical testing in offshore or indoor laboratories, directly obtaining reliable and accurate soil strength parameters. During the actual sampling process, after the soil sampler is drilled into place and sampling is completed, the soil sample tube needs to be pulled upward. During the upward extraction of the sampling tube, the soil sample inside the tube is stretched by the soil sample below the soil sampler. This stretching causes the soil sample to expand, disturbing the sampled soil, reducing the sample quality, and affecting the accuracy of the results. At the same time, due to the stretching of the soil sample at the bottom of the soil sampler, the connection between the soil sample inside the soil sampler and the external soil sample is broken, preventing the soil sample from being lifted with the soil sampler, reducing the soil sample acquisition rate. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the soil sample in the soil sampler is easily broken due to being connected to the external soil sample during upward stretching, thereby reducing the soil sample acquisition rate, thereby providing a soil sampler, a drilling rig and a method of use.

[0004] In order to solve the above problems, the present invention provides a soil collecting device, comprising:

[0005] A shell assembly, wherein the shell assembly is provided with a through hole provided therethrough, and a through hole provided therethrough on the outer wall of the shell assembly;

[0006] The cutting assembly includes a steel coil and a cable. The steel coil is arranged at the bottom of the inner wall of the through hole. The cable passes through the cable hole. One end of the cable is connected to the steel coil, and the other end extends out of the cable hole.

[0007] The cutting assembly includes a steel coil and a cable. The steel coil is arranged at the bottom of the inner wall of the through hole. The cable passes through the cable hole. One end of the cable is connected to the steel coil, and the other end extends out of the cable hole.

[0008] Optionally, the shell assembly includes a sleeve and a liner, the sleeve and the liner are rotatably connected, and the sleeve is sleeved on the outer circumference of the liner.

[0009] Optionally, a cable threading hole is provided on the wall of the liner, and a corner annular groove is provided on the bottom of the inner wall of the casing, and the steel coil is arranged in the corner annular groove.

[0010] Optionally, a narrow annular groove is formed between the liner and the casing, and the narrow annular groove is filled with sealant.

[0011] Optionally, an airway hole is provided on the tube wall of the sleeve, and an inflation tube is provided in the airway hole.

[0012] Optionally, the steel coil is made of flexible material.

[0013] Optionally, it also includes a propulsion assembly arranged at the upper end of the shell assembly, the propulsion assembly is provided with a propulsion head and a propulsion cap, the propulsion cap is sleeved on the outer periphery of the propulsion head, and the propulsion assembly is provided with a socket at the end facing away from the shell assembly, and the socket is used to fix the propulsion cap and the propulsion head.

[0014] Optionally, the propulsion assembly further includes a fastening rod and a fastener, and the propulsion head and the propulsion cap are both provided with corresponding connecting holes, the fastening rod is passed through both ends of the connecting hole, the fastening rod extends out of the outside of the propulsion cap and is fixed with a fastener, and the central axis of the fastening rod is perpendicular to the central axis of the shell assembly.

[0015] A drilling rig comprises the above-mentioned soil sampler and a clamping end.

[0016] A method for using a soil sampler comprises the following steps: in a sampling state, rotating a shell assembly into a soil layer to reach a preset depth; after sampling is completed, pulling a cable upward to drive a steel coil to horizontally cut off the connection between soil samples at the bottom of the shell assembly; and pulling the shell assembly upward to drive the soil sample in the through hole to move upward until it leaves the soil layer.

[0017] The technical solution of the present invention has the following advantages:

[0018] 1. The soil sampler provided by the present invention includes: a shell assembly, provided with a through hole set through, and the shell assembly is provided with a through hole set through; a cutting assembly, including a steel coil and a cable, the steel coil is provided at the bottom of the inner wall of the through hole, the cable is provided through the cable hole, one end of the cable is connected to the steel coil, and the other end extends out of the cable hole. In the sampling state, the shell assembly is rotated to enter the soil layer to reach a preset depth. After the sampling is completed, the cable is pulled upward to drive the steel coil to horizontally cut off the connection between the soil samples at the bottom of the shell assembly, and the shell assembly is pulled upward to drive the soil sample in the through hole to move upward until it leaves the soil layer. Before the soil sampler is stretched upward, the connection between the soil samples at the bottom is cut off by the steel coil, so as to solve the problem that the soil samples in the soil sampler are easily broken due to the connection with the external soil samples during the upward stretching of the soil sampler, thereby improving the soil sample acquisition rate.

[0019] 2. The soil sampler provided by the present invention has a shell assembly including a sleeve and a liner, which are rotatably connected to each other. The sleeve is sleeved on the outer periphery of the liner to achieve relative rotation between the sleeve and the liner, so that a height difference appears between the sleeve and the liner.

[0020] 3. The soil sampler provided by the present invention has a rope threading hole on the pipe wall of the liner, and a corner annular groove is provided on the bottom of the inner wall of the casing. The steel coil is arranged in the corner annular groove. The corner annular groove is used to accommodate the steel coil when the casing and the liner enter the soil, so as to avoid the problem that the steel coil enters the soil too early and the soil sample connection cannot be cut off.

[0021] 4. In the soil sampler provided by the present invention, a narrow annular groove is formed between the liner and the casing, and the narrow annular groove is filled with sealant to seal the steel coil.

[0022] 5. The soil sampler provided by the present invention has an airway hole on the tube wall of the casing, and an inflation tube is provided in the airway hole. During the process of pulling the liner upward, the inflation tube inflates the gap formed by the upward movement of the liner to ensure pressure balance in the soil.

[0023] 6. The soil sampler provided by the present invention is made of a flexible material of the steel coil so as to horizontally cut off the connection between the soil bodies when the cable is pulled upward.

[0024] 7. The soil sampler provided by the present invention also includes a propulsion assembly arranged at the upper end of the shell assembly. The propulsion assembly is provided with a propulsion head and a propulsion cap. The propulsion cap is sleeved on the outer periphery of the propulsion head. A socket is provided at the end of the propulsion assembly away from the shell assembly. The socket is used to fix the propulsion cap and the propulsion head so that the propulsion cap and the propulsion head move synchronously.

[0025] 8. The soil sampler provided by the present invention further comprises a fastening rod and a fastener. The propulsion head and propulsion cap are both provided with corresponding connection holes. The fastening rod is inserted through both ends of the connection hole. The fastening rod extends outward from the propulsion cap and is fixed with the fastener. The central axis of the fastening rod is perpendicular to the central axis of the housing assembly. The fastener secures the fixing rod. The fixing of the fixing rod in both directions ensures a secure connection between the propulsion cap and the propulsion head.

[0026] 9. The drilling rig provided by the present invention has the advantages described in any of the above items because it adopts the soil sampler described in any of the above items. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A front view of the soil sampler provided in an embodiment of the present invention when in a horizontal state;

[0029] Figure 2 for Figure 1 A top view in the direction of shown;

[0030] Figure 3 A top view of a soil sampler provided in an embodiment of the present invention;

[0031] Figure 4 A front view of a propulsion assembly provided in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the connection between the casing and the liner when the liner is pulled upwards according to an embodiment of the present invention.

[0033] Explanation of the accompanying reference numerals: 1. casing; 2. liner; 3. concave and convex connecting groove; 4. cable hole; 5. cable; 6. airway hole; 7. inflation tube; 8. propulsion cap; 9. propulsion head; 10. fastening rod; 11. fastener; 12. connecting hole; 13. socket; 14. threaded hole; 15. steel coil; 16. corner annular groove; 17. sealant. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] This embodiment provides a specific implementation of a sampler, such as Figure 1 As shown in FIG5 , a sampler comprises:

[0039] The shell component is provided with a through hole, which is used to accommodate the soil sample to be sampled. Figure 1 、 Figure 2 As shown, the shell assembly includes a sleeve 1 and a liner 2, which are rotatably connected, and the sleeve 1 is sleeved on the outer periphery of the liner 2. Along the longitudinal direction of the axis, a concave-convex connection groove 3 is provided between the sleeve 1 and the liner 2, wherein the concave portion of the concave connection groove is located on the outer wall of the liner 2 and the convex portion is located on the inner wall of the sleeve 1. Figure 1 As shown, the through hole is a hole in the liner 2, and the wall of the liner 2 is provided with a cable hole 4. The bottom of the inner wall of the casing 1 is provided with an annular corner groove 16, and the wall of the casing 1 is provided with an airway hole 6, and the airway hole 6 is provided with an inflation tube 7. The bottom of the casing 1 and the bottom of the liner 2 form a narrow annular groove.

[0040] As an alternative embodiment, the casing 1 and the liner 2 are rotatably connected by threads, that is, the inner wall of the casing 1 is provided with an internal thread, and the outer wall of the liner 2 is provided with an external thread.

[0041] The cutting assembly includes a fixedly connected steel coil and a cable 5, wherein the steel coil 15 is located in an annular groove 16 at the corner, and an annular narrow groove is formed at the bottom of the casing 1 and the bottom of the liner 2 and filled with sealant 17. Specifically, the steel coil 15 is made of a flexible material.

[0042] like Figure 3 、 Figure 4As shown, the propulsion assembly is arranged at the upper end of the shell assembly. The propulsion assembly is provided with a propulsion head 9 and a propulsion cap 8. The propulsion cap 8 is sleeved on the outer periphery of the propulsion head 9. A clamping seat 13 is provided at the end of the propulsion assembly away from the shell assembly. The clamping seat 13 is used to fix the propulsion cap 8 and the propulsion head 9. That is, the tops of the propulsion cap 8 and the propulsion head 9 are both provided with internal threaded holes 14. The fixed ends of the clamping seat 13 are respectively threadedly connected to the propulsion cap 8 and the propulsion head 9. In order to further fix the propulsion head 9 and the propulsion cap 8, the propulsion assembly also includes a fastening rod 10 and a fastener 11. The propulsion head 9 and the propulsion cap 8 are respectively provided with corresponding connection holes 12. The fastening rod 10 is passed through the two ends of the connection hole 12. The fastening rod 10 extends out of the outside of the propulsion cap 8 and is fixed with the fastener 11, and the central axis of the fastening rod 10 is perpendicular to the central axis of the shell assembly. It should be noted that the pull rope 5 and the inflation tube 7 pass through the propulsion head 9 and the propulsion cap 8 respectively, that is, the upper ends of the pull rope 5 and the inflation tube 7 are respectively located outside the propulsion cap 8; the propulsion cap 8 is provided with an external card groove adapted to the sleeve 1, and the propulsion head 9 is provided with an internal card groove adapted to the liner 2, that is, the propulsion cap 8 is connected by a card connection to the sleeve 1, and the propulsion head 9 is connected by a card connection to the liner 2.

[0043] As an alternative embodiment, the propulsion cap 8 is connected to the casing 1 by threaded rotation, and the propulsion head 9 is connected to the liner 2 by threaded rotation.

[0044] A drilling rig includes the above-mentioned soil sampler and a clamping end, wherein the clamping end is clamped and connected to the clamping seat 13.

[0045] A method for using a soil sampler comprises the following steps:

[0046] 1) Install the drill. Connect the base 13 of the soil sampler to the clamping end of the drilling rig, so that the propulsion cap 8 is fixedly connected to the casing 1 and the propulsion head 9 is fixedly connected to the liner 2. The bottom surfaces of the casing 1 and the liner 2 are flush. Start the drilling rig and keep the cable 5 loose during the drilling process until the preset depth is reached;

[0047] 2) Disengage the double pipes, separate the holder 13 from the push head 9, and the fasteners 11 from the fasteners 11, so that the casing 1 and the liner 2 are separated. Start the drilling rig and slightly advance the casing 1 by pushing the push cap 8 so that the bottom of the casing 1 is slightly lower than the liner 2;

[0048] 3) Cut the soil sample, lift the cable 5, and the cable 5 drives the steel coil 15 to break through the sealant 17. The steel coil 15 cuts the connection between the soil sample inside the liner 2 and the soil sample outside the liner 2 in the horizontal direction;

[0049] 4) Pull up the casing 1 again to realign the connection holes 12 of the push head 9 and the push cap 8. Insert the fixing rod into the connection hole 12 to securely connect the fastening rod 10 to the fastener 11. At the same time, reconnect the clamping seat 13 to the push head 9 to complete the fixation of the liner 2 and the casing 1.

[0050] 5) Soil sampling: the drill drives the soil sampler to lift upwards and take out the soil sample in the liner 2. While lifting upwards, gas or water is filled through the inflation holes to maintain the stability of the bottom pressure of the pipe during the lifting process;

[0051] 6) After the sampling is completed, the casing 1, liner 2, cable 5, and steel coil 15 are reassembled and ready for next use.

[0052] The soil sampler provided by the present invention is provided with a double-layer casing 1 and liner 2 that can move relatively. After being drilled into place, the casing 1 and the liner 2 move relatively to make the casing 1 slightly lower than the liner 2, ensuring that the steel coil 15 provided on the inner wall of the casing 1 is lower than the bottom of the liner 2. By pulling the rope 5, the steel coil 15 cuts off the connection between the soil samples inside and outside the liner 2, solving the problem that the soil sample is easily broken during the pulling process, and avoiding the problem of soil sample expansion causing disturbance of the soil sample; water or air is filled into the bottom of the pipe through the inflation pipe 7 to maintain pressure near the bottom of the pipe, avoid negative pressure suction at the bottom, further eliminate the tensile load that the soil in the pipe may bear, and solve the problem of tensile damage of the soil.

[0053] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications derived therefrom remain within the scope of protection of the present invention.

Claims

1. A soil sampler, characterized in that: include: A shell assembly, wherein the shell assembly is provided with a through hole provided therethrough, and a through hole (4) provided therethrough on the outer wall of the shell assembly; A cutting assembly, the cutting assembly comprising a steel coil (15) and a cable (5), the steel coil (15) being arranged at the bottom of the inner wall of the through hole, the cable (5) being passed through the cable hole (4), one end of the cable (5) being connected to the steel coil (15), and the other end being extended out of the cable hole (4); The shell assembly comprises a sleeve (1) and a liner (2), wherein the sleeve (1) and the liner (2) are rotatably connected, and the sleeve (1) is sleeved on the outer periphery of the liner (2); The wall of the liner (2) is provided with a cable hole (4), the bottom of the inner wall of the casing (1) is provided with a corner annular groove (16), and the steel coil (15) is arranged in the corner annular groove (16); An annular narrow groove is formed between the liner (2) and the casing (1), and the annular narrow groove is filled with a sealant (17); The invention also includes a propulsion assembly arranged at the upper end of the shell assembly, wherein the propulsion assembly is provided with a propulsion head (9) and a propulsion cap (8), wherein the propulsion cap (8) is sleeved on the outer periphery of the propulsion head (9), and a clamping seat (13) is provided at one end of the propulsion assembly away from the shell assembly, wherein the clamping seat (13) is used to fix the propulsion cap (8) and the propulsion head (9); The propulsion assembly further comprises a fastening rod (10) and a fastener (11); the propulsion head (9) and the propulsion cap (8) are both provided with corresponding connection holes (12); the fastening rod (10) is passed through both ends of the connection hole (12); the fastening rod (10) extends out of the propulsion cap (8) and is fixed with a fastener (11); The propulsion cap (8) is provided with an outer slot adapted to the sleeve (1), and the propulsion head (9) is provided with an inner slot adapted to the liner (2); The double tubes are disengaged, the holder (13) is separated from the push head (9), and the fasteners (11) are separated from the fasteners (11), so that the casing (1) and the liner (2) are separated, the drilling rig is started, and the casing (1) is slightly advanced by pushing the push cap 8 so that the bottom of the casing (1) is slightly lower than the liner (2); Cut the soil sample, lift the cable (5), and the cable (5) drives the steel coil (15) to break through the sealant (17), and the steel coil (15) cuts off the connection between the soil sample inside the liner (2) and the soil sample outside the liner (2) in the horizontal direction.

2. The soil sampler according to claim 1, characterized in that: An airway hole (6) is provided on the tube wall of the sleeve (1), and an inflation tube (7) is provided in the airway hole (6).

3. The soil sampler according to claim 1, characterized in that: The steel coil (15) is made of a flexible material.

4. The soil sampler according to claim 3, characterized in that: The central axis of the fastening rod (10) is perpendicular to the central axis of the housing assembly.

5. A drilling rig, characterized in that: The soil sampler comprises the soil sampler according to any one of claims 1 to 4, and further comprises a clamping end.

6. A method for using a soil sampler, for using the soil sampler according to claim 1, characterized in that: The following steps are involved: In the sampling state, the shell assembly is rotated to enter the soil layer to reach a preset depth. After the sampling is completed, the cable (5) is pulled upward to drive the steel coil (15) to horizontally cut off the connection between the soil samples at the bottom of the shell assembly, and the shell assembly is pulled upward to drive the soil sample in the through hole to move upward until it leaves the soil layer.

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