Efficient field deep well bottom mud sampling device

Abstract

The invention relates to the technical field of geological survey outdoor sampling, and discloses an efficient field deep well bottom mud sampling device, which comprises a controller, a sampling pipe group, a frame body, a lifting mechanism and a driving mechanism, the driving mechanism and the lifting mechanism are both arranged on the frame body, the frame body is provided with a sampling port, and the sampling port is located between the driving mechanism and the lifting mechanism; the lifting mechanism is in detachable driving connection with the sampling pipe group, and is used for driving the sampling pipe group to enter the water well through the sampling port and abut against a well bottom sampling point; the driving mechanism is in detachable driving connection with the sampling pipe group and is used for driving the sampling pipe group to repeatedly lift along the vertical direction; one end of the sampling pipe group is a sample introduction end; the controller is electrically connected with the lifting mechanism and the driving mechanism. According to the technical scheme, the size of the sampling pipe set can be adjusted according to the caliber of the water well, the driving mechanism automatically drives the sampling pipe set to vertically ascend and descend for sampling, the device can adapt to water wells with various calibers, operation is automatic, and the operation difficulty is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of outdoor sampling technology for geological surveys, and in particular to a high-efficiency deep well bottom mud sampling device for field use. Background Technology

[0002] Geological field sampling is a core and fundamental step in fields such as hydrogeological exploration, groundwater environmental monitoring, mineral resource exploration, and contaminated site remediation. Its core objective is to obtain representative, complete, and undisturbed geological media samples (including soil, rocks, sediments, etc.) to provide direct data support for subsequent physicochemical analysis, environmental assessment, and engineering design.

[0003] Field well bottom sediment sampling refers to a specialized technique for collecting sediment samples from the sedimentation zone at the bottom of various wells, such as groundwater monitoring wells, exploration wells, and water supply wells. As the terminal area of ​​groundwater flow, the sediment at the bottom of a well (containing rock powder, silt, clayey mud, and pollutant-rich layers) is a key carrier reflecting groundwater environmental quality, stratigraphic evolution, and pollution source tracing. By analyzing the physicochemical properties of the sediments (such as heavy metal content, organic matter composition, and particle size distribution), the degree of groundwater pollution, pollution pathways, and aquifer permeability characteristics can be accurately determined. Currently, gravity-type and piston-type sediment samples are generally used. Gravity-type sediment samples have certain requirements on the well diameter, only compatible with wells with a diameter of 50mm or larger; while piston-type sediment samples require professional personnel to control the piston lifting speed (0.5m / s). Insufficient negative pressure can easily lead to sample detachment, while excessive negative pressure can damage the sediment structure, making operation difficult. Existing sampling devices are challenging to use, and the sediment sampling process is relatively cumbersome. Summary of the Invention

[0004] The main objective of this invention is to provide an efficient field deep well bottom mud sampling device, which aims to solve the problems of high difficulty in mud sampling and cumbersome process of existing sampling devices.

[0005] To achieve the above objectives, the technical solution proposed by this invention is as follows: A high-efficiency field deep well bottom sediment sampling device includes a controller, a sampling tube assembly, a frame, a lifting mechanism, and a drive mechanism. Both the drive mechanism and the lifting mechanism are mounted on the frame, which has a sampling port located between the drive mechanism and the lifting mechanism. The lifting mechanism is detachably driven by the sampling tube assembly, driving it through the sampling port into the well and abutting the bottom sampling point. The drive mechanism is also detachably driven by the sampling tube assembly, driving it to repeatedly move vertically up and down. One end of the sampling tube assembly is the inlet end. The controller is electrically connected to both the lifting mechanism and the drive mechanism, controlling the lifting mechanism to drive the sampling tube assembly into the well and insert the inlet end into the bottom sampling point. The controller also controls the drive mechanism to repeatedly move the sampling tube assembly up and down when the inlet end is inserted into the bottom sampling point, thus repeatedly inserting the inlet end into the bottom sampling point and feeding bottom sediment into the sampling tube assembly.

[0006] Preferably, the sampling tube group includes at least one sample storage tube and at least one connecting tube. The sample storage tubes are detachably connected in sequence to form a first tube group, and each sample storage tube is used to store sediment at the bottom of the water well. The connecting tubes are detachably connected in sequence to form a second tube group, and each connecting tube is used to extend the length of the sampling tube group. One end of the first tube group is connected to one end of the second tube group, connecting the first tube group and the second tube group. The end of the first tube group away from the second tube group is the sample inlet end.

[0007] Preferably, the sample storage tube includes a first tube body and a check valve. A first insertion tube is provided at the end of the first tube body near the sample inlet, and the outer wall of the first insertion tube is provided with external threads. A first inner tube is provided at the end of the first tube body away from the sample inlet, and the inner wall of the first inner tube is provided with internal threads. The diameter of the first insertion tube is smaller than that of the first inner tube. The first insertion tube, the first tube body, and the first inner tube are all coaxially arranged. The check valve is provided at the end of the first insertion tube away from the first tube body. A plurality of water outlet holes are formed in the tube wall of the first tube body. Two first lifting heads are provided on the outer wall of the first tube body. The two first lifting heads are symmetrically arranged along the axial direction of the first tube body, and the two first lifting heads are located near the end of the first tube body away from the first insertion tube.

[0008] Preferably, the connecting tube includes a second tube body, a second insert tube is provided at one end of the second tube body near the sample inlet, and the outer wall surface of the second insert tube is provided with external threads; a second inner tube is provided inside the end of the second tube body away from the sample inlet, and the inner wall surface of the second inner tube is provided with internal threads, and the diameter of the second insert tube is smaller than that of the second inner tube; the second insert tube, the second tube body, and the second inner tube are all coaxially arranged; two second lifting heads are provided on the outer wall surface of the second tube body, and the two second lifting heads are symmetrically arranged along the axial direction of the second tube body, and the two second lifting heads are located near the end of the second tube body away from the second insert tube.

[0009] Preferably, the lifting device includes a winding reel, a connecting cable, a first side frame, and a servo motor. The first side frame is located on the side of the sampling port away from the driving mechanism, and a fixed pulley set is provided at the top of the first side frame. The winding reel is rotatably located on the side of the first side frame away from the sampling port. The output end of the servo motor drives and connects to the winding reel, and the servo motor is used to drive the winding reel to rotate. One end of the connecting cable is connected to the winding reel, and the other end of the connecting cable is provided with two lifting hooks. The end of the connecting cable with the two lifting hooks is suspended above the sampling port through the fixed pulley set. The two lifting hooks are used to detachably connect to the two first lifting heads of the sample storage tube, or to detachably connect to the two second lifting heads of the connecting tube.

[0010] Preferably, the driving mechanism includes an electrically controlled lifting column, a second side frame, and a clamping structure. The electrically controlled lifting column is located on the side of the sampling port opposite to the lifting mechanism. The second side frame is located on the side of the electrically controlled lifting column opposite to the sampling port. A slide rail is provided on the side of the second side frame near the electrically controlled lifting column, and the slide rail extends vertically. A connecting slide block is slidably mounted on the slide rail. The output end of the electrically controlled lifting column drives the connecting slide block to move vertically up and down along the slide rail. The clamping structure is located on the side of the connecting slide block opposite to the second side frame. The clamping structure is used to clamp and fix the connecting tube furthest from the injection end in the second tube group. A controller is electrically connected to the electrically controlled lifting column. When the clamping structure clamps the sampling tube group, the controller controls the electrically controlled lifting column to drive the sampling tube group to repeatedly move up and down along a preset trajectory via the connecting slide block and the clamping structure.

[0011] Preferably, the clamping structure includes a support frame, a linear motor, two connecting rods, and two first clamping plates. The support frame is disposed on the side of the connecting slide away from the second side frame, and the linear motor is disposed within the support frame. The two first clamping plates are spaced apart in a horizontal direction, and the sampling tube group is located between the two first clamping plates. The support frame has a support channel along the two first clamping plates toward the linear motor, wherein one of the first clamping plates is connected to one slide of the linear motor through one of the connecting rods, and the other first clamping plate is connected to the other slide of the linear motor through the other connecting rod. The controller is electrically connected to the linear motor, and the controller is used to control the linear motor to drive the two first clamping plates to move closer together through the two connecting rods, so that the two first clamping plates clamp and fix the connecting tube furthest from the injection end in the second tube group.

[0012] Preferably, the frame is further provided with two fixing mechanisms, which are spaced apart. The sampling port is located between the two fixing mechanisms. The controller is electrically connected to the two fixing mechanisms and is used to drive the two fixing mechanisms to move horizontally toward the sampling port so that the two fixing mechanisms clamp and fix the sample storage tube or the connecting tube passing through the sampling port.

[0013] Preferably, the fixing mechanism includes a track, an electrically controlled slide, a connecting frame, and a second clamping plate. The track is disposed on the frame, and the extension trajectory of the track passes through the sampling port along the vertical central axis, with the extension trajectories of the two tracks coinciding. The electrically controlled slide is slidably connected to the track, and the connecting frame is disposed on the side of the electrically controlled slide away from the track. The second clamping plate is disposed on the side of the connecting frame close to the sampling port. The controller is electrically connected to the two electrically controlled slides respectively, and the controller is used to control the two electrically controlled slides to drive the second clamping plate connected to them to move towards the sampling port, so that the two second clamping plates clamp the sample storage tube or the connecting tube passing through the sampling port.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: The sampling tube assembly is pulled into the bottom of the well through the sampling port by the lifting mechanism. Then, the driving mechanism drives the sampling tube assembly to repeatedly rise and fall along a preset vertical trajectory so that the sampling end is repeatedly inserted into the sampling point at the bottom of the well, and the bottom sediment is sent into the sampling tube assembly. The size of the sampling tube assembly can be adjusted according to the diameter of the well. The driving mechanism realizes automatic vertical lifting and lowering of the sampling tube assembly for sampling, which can adapt to wells of various diameters and is automated, effectively reducing the difficulty of operation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the high-efficiency field deep well bottom mud sampling device of the present invention; Figure 2 for Figure 1 A magnified structural diagram of A in the middle; Figure 3 This is a schematic diagram of the sample storage tube. Figure 4 This is a schematic diagram of the connecting pipe structure; Explanation of icon numbers: 1-Frame; 11-Sampling port; 12-Motor; 2-Lifting mechanism; 21-Winding reel; 22-Connecting cable; 23-First side frame; 24-Servo motor; 25-Fixed pulley block; 3-Drive mechanism; 31-Electrically controlled lifting column; 32-Second side frame; 33-Slide rail; 34-Connecting slide block; 4-Sample storage tube; 41-First tube body; 42-First insertion tube; 43-First inner tube; 44-Check valve; 45-Water outlet; 46-First lifting head; 5-Connecting pipe; 51-Second pipe body; 52-Second insertion pipe; 53-Second inner pipe; 54-Second lifting head; 6-Clamping structure; 61-Support frame; 62-Linear motor; 63-Connecting rod; 64-First clamping plate; 65-Support channel; 66-Range sensor; 67-Electrically controlled telescopic rod; 7-Fixing mechanism; 71-Rail; 72-Electrically controlled slide; 73-Connecting frame; 74-Second clamping plate; The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0019] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0022] This invention proposes a high-efficiency field deep well bottom mud sampling device.

[0023] like Figures 1 to 4As shown, a high-efficiency field deep well bottom sediment sampling device includes a controller, a sampling tube assembly, a frame 1, a lifting mechanism 2, and a drive mechanism 3. Both the drive mechanism 3 and the lifting mechanism 2 are mounted on the frame 1. The frame 1 has a sampling port 11 located between the drive mechanism 3 and the lifting mechanism 2. The lifting mechanism 2 is detachably connected to the sampling tube assembly, driving it through the sampling port 11 into the well and abutting the bottom sampling point. The drive mechanism 3 is also detachably connected to the sampling tube assembly, driving it to repeatedly lift and lower vertically. One end of the sampling tube assembly is the inlet end. The controller is electrically connected to both the lifting mechanism 2 and the drive mechanism 3. The controller controls the lifting mechanism 2 to drive the sampling tube assembly into the well, inserting the inlet end into the bottom sampling point. The controller also controls the drive mechanism 3 to repeatedly lift and lower the sampling tube assembly when the inlet end is inserted into the bottom sampling point, thus repeatedly inserting the inlet end into the bottom sampling point and sending the bottom sediment into the sampling tube assembly.

[0024] The sampling tube assembly is pulled into the bottom of the well through the sampling port 11 by the lifting mechanism 2. Then, the sampling tube assembly is driven to repeatedly rise and fall along a preset vertical trajectory by the drive mechanism 3, so that the sampling end is repeatedly inserted into the sampling point at the bottom of the well, and the bottom sediment is sent into the sampling tube assembly. The size of the sampling tube assembly can be adjusted according to the diameter of the well. The drive mechanism 3 realizes automatic vertical lifting and lowering of the sampling tube assembly for sampling, which can adapt to wells of various diameters and is automated, effectively reducing the difficulty of operation.

[0025] Specifically, a mover 12 is installed at the bottom of the frame 1, which is used to drive the frame 1 to move in the field; The sampling tube assembly includes at least one sample storage tube 4 and at least one connecting tube 5. The sample storage tubes 4 are detachably connected in sequence to form a first tube assembly, and each sample storage tube 4 is used to store sediment at the bottom of the water well. The connecting tubes 5 are detachably connected in sequence to form a second tube assembly, and each connecting tube 5 is used to extend the length of the sampling tube assembly. One end of the first tube assembly is connected to one end of the second tube assembly, thus connecting the first tube assembly and the second tube assembly. The end of the first tube assembly away from the second tube assembly is the sample inlet end.

[0026] The sample storage tube 4 includes a first tube body 41 and a check valve 44. A first insertion tube 42 is provided at the end of the first tube body 41 near the sample inlet, and the outer wall of the first insertion tube 42 is provided with external threads. A first inner tube 43 is provided at the end of the first tube body 41 away from the sample inlet, and the inner wall of the first inner tube 43 is provided with internal threads. The diameter of the first insertion tube 42 is smaller than that of the first inner tube 43. The first insertion tube 42, the first tube body 41, and the first inner tube 43 are all coaxially arranged. The check valve 44 is provided at the end of the first insertion tube 42 away from the first tube body 41. Several water outlet holes 45 are opened in the tube wall of the first tube body 41. Two first lifting heads 46 are provided on the outer wall of the first tube body 41. The two first lifting heads 46 are symmetrically arranged along the axial direction of the first tube body 41 and are located near the end of the first tube body 41 away from the first insertion tube 42. The first insertion tube 42 of the upper sample tube 4 of two adjacent sample tubes 4 is inserted into the first inner tube 43 of the lower sample tube 4 and threaded together, thereby achieving a quick connection between the two adjacent sample tubes 4.

[0027] The drive mechanism 3 drives the first tube group to repeatedly rise and fall vertically via the second tube group. When the first tube group descends, the impact force of the descent causes the mud and water to impact the check valve 44 at the sample inlet, causing the check valve 44 to engage, allowing the mud and water to enter the first tube body 41 through the check valve 44. When the first tube group rises, the impact force of the descent disappears, and the check valve 44 closes, allowing the mud and water that entered the first tube body 41 to accumulate inside the first tube body 41. The first tube group repeatedly rises and falls, and the first tube body 41 closest to the sample inlet is filled with mud and water first. At this time, the mud and water in the first tube body 41 closest to the sample inlet will open the check valve 44 of the upper sample storage tube 4, allowing the mud and water to enter the next first tube body 41. This process is repeated until each sample storage tube 4 in the first tube group is filled with mud and water from bottom to top.

[0028] The sample storage tube 4 has an outlet hole 45. During sampling, each sample storage tube 4 maintains a vertical lifting and lowering motion, which causes the water in the mud and water to be discharged through the outlet hole 45 during the sampling process. Finally, each sample storage tube 4 stores bottom mud that meets the test standards, and there is no need to send the bottom mud in the sample storage tube 4 into the sedimentation tank for sedimentation.

[0029] Specifically, the first insertion tube 42 of the sample storage tube 4 furthest from the frame 1 is the sample inlet.

[0030] Specifically, check valve 44 is a duckbill-type check valve, suitable for muddy water scenarios. The duckbill-type check valve 44 has a non-jamming structure, with no valve disc, rotating shaft, or other moving parts. It relies solely on the elastic opening and closing of the rubber duckbill-shaped lip (push open with forward pressure, automatically close in reverse), completely solving the problem of mud and sand jamming. The duckbill-type check valve 44 features low-pressure high sensitivity, with an opening pressure as low as 0.01MPa. When the drive mechanism 3 drives the sampling tube assembly for insertion, the natural pressure of the mud and water can push open the lip, requiring no additional force. The duckbill-type check valve 44 has reliable sealing; the lip uses an elastic compression seal, and the lip instantly closes when withdrawn (closing response time less than 0.05 seconds), with a backflow rate of less than 3%. The flow channel has a smooth curved surface, preventing turbulent scouring when mud and sand pass through, extending the life of the sealing surface.

[0031] The connecting tube 5 includes a second tube body 51. A second insertion tube 52 is provided at the end of the second tube body 51 near the sample inlet, and the outer wall of the second insertion tube 52 is provided with external threads. A second inner tube 53 is provided inside the end of the second tube body 51 away from the sample inlet, and the inner wall of the second inner tube 53 is provided with internal threads. The diameter of the second insertion tube 52 is smaller than that of the second inner tube 53. The second insertion tube 52, the second tube body 51, and the second inner tube 53 are all coaxially arranged. Two second lifting heads 54 are provided on the outer wall of the second tube body 51. The two second lifting heads 54 are symmetrically arranged along the axial direction of the second tube body 51, and are located at the end of the second tube body 51 away from the second insertion tube 52. The second insertion tube 52 of the connecting tube 5 closest to the sample inlet is inserted into the first inner tube 43 of the sample storage tube 4 furthest from the sample inlet and threaded together, thereby connecting the first tube group and the second tube group. The second insert 52 of the upper connecting pipe 5 is inserted into the second inner tube 53 of the lower connecting pipe 5 and threaded together, thereby achieving a quick connection between the two adjacent connecting pipes 5.

[0032] The connecting tube 5 serves to extend the sampling tube group. However, if all the samples are stored in the storage tube 4, it is very easy for mud to overflow and contaminate the frame 1.

[0033] Specifically, the controller acquires well depth data, connecting pipe 5 model data, sample storage pipe 4 model data, and sampling volume. Based on the sampling volume and sample storage pipe 4 model data, it determines the first quantity of sample storage pipes 4; based on the first quantity of sample storage pipes 4 and depth data, it determines the first quantity of connecting pipes 5; and based on the first quantity of sample storage pipes 4 and the first quantity of connecting pipes 5, it forms a first sampling plan. The automatic generation of the sampling plan based on the data further reduces the sampling difficulty.

[0034] Specifically, based on the model data and the first quantity of sample storage tubes 4, the length data of the first tube group is determined. It is then determined whether the length data of the first tube group is greater than or equal to the depth data. If the length data of the first tube group is less than the depth data, the step of determining the first quantity of connecting tubes 5 based on the first quantity of sample storage tubes 4 and the depth data is executed. If the length data of the first tube group is greater than or equal to the depth data, the difference is determined based on the length data and the depth data. The number of executions is determined based on the multiple between the difference and the depth data. The second quantity of sample storage tubes 4 is determined based on the number of executions. The second quantity of connecting tubes 5 is determined based on the second quantity of sample storage tubes 4 and the depth data. Finally, the second sampling scheme is determined based on the number of executions, the second quantity of sample storage tubes 4, and the second quantity of connecting tubes 5.

[0035] The sampling plan and the number of times the sampling plan is executed are determined based on the difference to avoid the first tube 41 being too close to the ground, which could cause mud and water to overflow. For example, when the difference equals the depth data, the number of executions is three, and the first number of sample storage tubes 4 is three times the second number of sample storage tubes 4. In the first sampling plan, the first number of sample storage tubes 4 is nine, and in the second sampling plan, the second number of sample storage tubes 4 is three.

[0036] The lifting device includes a winding reel 21, a connecting cable 22, a first side frame 23, and a servo motor 24. The first side frame 23 is located on the side of the sampling port 11 away from the drive mechanism 3, and a fixed pulley group 25 is provided at the top of the first side frame 23. The winding reel 21 is rotatably located on the side of the first side frame 23 away from the sampling port 11. The output end of the servo motor 24 drives the winding reel 21 to rotate. One end of the connecting cable 22 is connected to the winding reel 21, and the other end of the connecting cable 22 is provided with two lifting hooks. The end of the connecting cable 22 with the two lifting hooks is suspended above the sampling port 11 through the fixed pulley group 25. The two lifting hooks are used to detachably connect the two first lifting heads 46 of the sample storage tube 4, or detachably connect the two second lifting heads 54 of the connecting tube 5. Servo motor 24 drives winding disc 21 to rotate, and the first lifting head 46 of each sample storage tube 4 and the second lifting head 54 of each connecting tube 5 are connected in sequence through two lifting hooks to achieve uniform descent of the sampling tube group and ensure the safety of the sampling tube group during the descent process.

[0037] The driving mechanism 3 includes an electrically controlled lifting column 31, a second side frame 32, and a clamping structure 6. The electrically controlled lifting column 31 has a sampling port 11 on the side away from the lifting mechanism 2. The second side frame 32 is located on the side of the electrically controlled lifting column 31 away from the sampling port 11. A slide rail 33 is located on the side of the second side frame 32 close to the electrically controlled lifting column 31, and the slide rail 33 extends vertically. A connecting slide 34 is slidably mounted on the slide rail 33. The output end of the electrically controlled lifting column 31 drives the connecting slide 34 to rise and fall vertically along the slide rail 33. The clamping structure 6 is located on the side of the connecting slide 34 away from the second side frame 32. The clamping structure 6 is used to clamp and fix the connecting tube 5 furthest from the injection end in the second tube group. The controller is electrically connected to the electrically controlled lifting column 31. When the clamping structure 6 clamps the sampling tube group, the controller controls the electrically controlled lifting column 31 to drive the sampling tube group to rise and fall repeatedly along a preset trajectory through the connecting slide 34 and the clamping structure 6. The electrically controlled lifting column 31 drives the connecting slide 34 to rise and fall vertically, and the slide rail 33 ensures the stability of the connecting slide 34, ensuring that the sampling tube group repeatedly rises and falls along the preset trajectory.

[0038] The clamping structure 6 includes a support frame 61, a linear motor 62, two connecting rods 63, and two first clamping plates 64. The support frame 61 is located on the side of the connecting slide 34 away from the second side frame 32, and the linear motor 62 is located inside the support frame 61. The two first clamping plates 64 are spaced apart in the horizontal direction, and the sampling tube group is located between the two first clamping plates 64. The support frame 61 has a support channel 65 along the two first clamping plates 64 toward the linear motor 62. One first clamping plate 64 is connected to one slide of the linear motor 62 through one of the connecting rods 63, and the other first clamping plate 64 is connected to the other slide of the linear motor 62 through another connecting rod 63. The controller is electrically connected to the linear motor 62 and is used to control the linear motor 62 to drive the two first clamping plates 64 to move closer together through the two connecting rods 63, so that the two first clamping plates 64 clamp and fix the connecting tube 5 furthest from the injection end in the second tube group. The support frame 61 transfers the weight of the sampling tube group held by the two first clamping plates 64 to the support frame 61 through the support channel 65; the support frame 61 then supports the frame body 1 and the first side frame 23 through the connecting slide 34 and the slide rail 33 to ensure that the sampling tube group is stably supported.

[0039] After the staff fixes the last connecting tube 5 into the sampling tube group, the top of the last connecting tube 5 is lowered to the preset height by the lifting mechanism 2 so that the two first clamping plates 64 can clamp and fix the last connecting tube 5. Specifically, the two first clamping plates 64 are arc-shaped on the side facing the sampling tube assembly so that the two first clamping plates 64 can better clamp the sampling tube assembly. The two first clamping plates 64 have receiving grooves on the side facing the sampling tube assembly. The two receiving grooves are used to accommodate the second lifting head 54 of the connecting tube 5 furthest from the sample inlet end, so as to fix the relative position of the clamping structure 6 and the sampling tube assembly.

[0040] Specifically, a rangefinder 66 and an electrically controlled telescopic rod 67 are installed on the side of the connecting frame 73 opposite to the sampling port 11. The rangefinder 66 is located on the side of the electrically controlled telescopic rod 67 opposite to the second side frame 32, and the output end of the electrically controlled telescopic rod 67 is connected to the rangefinder 66. The controller is electrically connected to the electrically controlled telescopic rod 67 and the rangefinder 66 respectively. When the linear motor 62 drives the two first clamping plates 64 to fix the sampling tube group, the controller controls the electrically controlled telescopic rod 67 to drive the rangefinder 66 to move to the position above the sampling tube group so that the rangefinder 66 can detect the depth inside the sampling tube group. The controller is used to obtain the length data of the second tube group and determine whether the depth inside the tube is greater than the length data of the second tube group. When the depth inside the tube is greater than the length data of the second tube group, the drive mechanism 3 continues to work; when the depth inside the tube is less than or equal to the length data of the second tube group, the drive mechanism 3 stops working. The drive mechanism 3 is automatically controlled according to the depth inside the sampling tube group, which further reduces the difficulty of operation.

[0041] The frame 1 is also equipped with two fixing mechanisms 7, which are spaced apart. The sampling port 11 is located between the two fixing mechanisms 7. The controller is electrically connected to the two fixing mechanisms 7 and is used to drive the two fixing mechanisms 7 to move horizontally towards the sampling port 11, so that the two fixing mechanisms 7 clamp and fix the sample storage tube 4 or connecting tube 5 passing through the sampling port 11. After the two fixing mechanisms 7 fix the sample storage tube 4 or connecting tube 5 passing through the sampling port 11, the workers remove the two lifting hooks on the sample storage tube 4 or connecting tube 5 passing through the sampling port 11, and then use the lifting mechanism 2 to lift the next sample storage tube 4 or connecting tube 5 to a position above the sample storage tube 4 or connecting tube 5 passing through the sampling port 11. The adjacent two tubes are then manually connected by thread. The above steps are repeated until the sampling tube assembly is completed and the sampling end is inserted into the bottom of the well for sampling. The fixing mechanism 7 includes a track 71, an electrically controlled slide 72, a connecting frame 73, and a second clamping plate 74. The track 71 is set on the frame 1, and the extension trajectory of the track 71 passes through the sampling port 11 along the vertical central axis. The extension trajectories of the two tracks 71 coincide. The electrically controlled slide 72 is slidably connected to the track 71. The connecting frame 73 is set on the side of the electrically controlled slide 72 away from the track 71, and the second clamping plate 74 is set on the side of the connecting frame 73 close to the sampling port 11. The controller is electrically connected to the two electrically controlled slides 72 respectively. The controller is used to control the two electrically controlled slides 72 to drive the connected second clamping plate 74 to move towards the sampling port 11, so that the two second clamping plates 74 clamp the sample storage tube 4 or the connecting tube 5 passing through the sampling port 11.

[0042] Specifically, the two second clamping plates 74 are arc-shaped on the side facing the sampling tube assembly so that the two second clamping plates 74 can better clamp the sampling tube assembly.

[0043] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A high-efficiency field deep well bottom sediment sampling device, characterized in that, The device includes a controller, a sampling tube assembly, a frame, a lifting mechanism, and a drive mechanism. Both the drive mechanism and the lifting mechanism are mounted on the frame, which has a sampling port located between the drive mechanism and the lifting mechanism. The lifting mechanism is detachably connected to the sampling tube assembly and drives it through the sampling port into the well to reach the sampling point at the bottom of the well. The drive mechanism is also detachably connected to the sampling tube assembly and drives it to repeatedly move vertically up and down. One end of the sampling tube assembly is the inlet end. The controller is electrically connected to both the lifting mechanism and the drive mechanism. The controller controls the lifting mechanism to drive the sampling tube assembly into the well and insert the inlet end into the sampling point at the bottom of the well. The controller also controls the drive mechanism to repeatedly move the sampling tube assembly up and down when the inlet end is inserted into the sampling point, thus repeatedly inserting the inlet end into the sampling point and feeding bottom sediment into the sampling tube assembly.

2. The high-efficiency field deep well bottom mud sampling device according to claim 1, characterized in that, The sampling tube assembly includes at least one sample storage tube and at least one connecting tube. The sample storage tubes are detachably connected in sequence to form a first tube assembly, and each sample storage tube is used to store sediment from the bottom of the well. The connecting tubes are detachably connected in sequence to form a second tube assembly, and each connecting tube is used to extend the length of the sampling tube assembly. One end of the first tube assembly is connected to one end of the second tube assembly, connecting the first tube assembly and the second tube assembly. The end of the first tube assembly away from the second tube assembly is the sample inlet end.

3. The high-efficiency field deep well bottom mud sampling device according to claim 2, characterized in that, The sample storage tube includes a first tube body and a check valve. A first insertion tube is provided at the end of the first tube body near the sample inlet, and the outer wall of the first insertion tube is provided with external threads. A first inner tube is provided at the end of the first tube body away from the sample inlet, and the inner wall of the first inner tube is provided with internal threads. The diameter of the first insertion tube is smaller than that of the first inner tube. The first insertion tube, the first tube body, and the first inner tube are all coaxially arranged. The check valve is located at the end of the first insertion tube away from the first tube body. Several water outlet holes are formed in the tube wall of the first tube body. Two first lifting heads are provided on the outer wall of the first tube body. The two first lifting heads are symmetrically arranged along the axial direction of the first tube body, and the two first lifting heads are located near the end of the first tube body away from the first insertion tube.

4. The high-efficiency field deep well bottom mud sampling device according to claim 3, characterized in that, The connecting tube includes a second tube body, with a second insert tube disposed at one end of the second tube body near the sample inlet end, and the outer wall surface of the second insert tube being provided with external threads; a second inner tube disposed inside the end of the second tube body away from the sample inlet end, and the inner wall surface of the second inner tube being provided with internal threads, the diameter of the second insert tube being smaller than that of the second inner tube; the second insert tube, the second tube body, and the second inner tube are all coaxially arranged; two second lifting heads are disposed on the outer wall surface of the second tube body, the two second lifting heads being symmetrically arranged along the axial direction of the second tube body, and the two second lifting heads being disposed near the end of the second tube body away from the second insert tube.

5. The high-efficiency field deep well bottom mud sampling device according to claim 4, characterized in that, The lifting device includes a winding reel, a connecting cable, a first side frame, and a servo motor. The first side frame is located on the side of the sampling port away from the driving mechanism, and a fixed pulley set is provided at the top of the first side frame. The winding reel is rotatably located on the side of the first side frame away from the sampling port. The output end of the servo motor drives and connects to the winding reel, and the servo motor is used to drive the winding reel to rotate. One end of the connecting cable is connected to the winding reel, and the other end of the connecting cable is provided with two lifting hooks. The end of the connecting cable with the two lifting hooks is suspended above the sampling port through the fixed pulley set. The two lifting hooks are used to detachably connect to the two first lifting heads of the sample storage tube, or to detachably connect to the two second lifting heads of the connecting tube.

6. A high-efficiency field deep well bottom mud sampling device according to any one of claims 2-5, characterized in that, The driving mechanism includes an electrically controlled lifting column, a second side frame, and a clamping structure. The electrically controlled lifting column is located on the side of the sampling port opposite to the lifting mechanism. The second side frame is located on the side of the electrically controlled lifting column opposite to the sampling port, and a slide rail is provided on the side of the second side frame near the electrically controlled lifting column. The slide rail extends vertically. A connecting slide block is slidably mounted on the slide rail, and the output end of the electrically controlled lifting column drives the connecting slide block to move vertically up and down along the slide rail. The clamping structure is located on the side of the connecting slide block opposite to the second side frame, and the clamping structure is used to clamp and fix the connecting tube furthest from the injection end in the second tube group. A controller is electrically connected to the electrically controlled lifting column, and the controller is used to control the electrically controlled lifting column to drive the sampling tube group to repeatedly move up and down along a preset trajectory through the connecting slide block and the clamping structure when the clamping structure clamps the sampling tube group.

7. The high-efficiency field deep well bottom mud sampling device according to claim 6, characterized in that, The clamping structure includes a support frame, a linear motor, two connecting rods, and two first clamping plates. The support frame is located on the side of the connecting slide away from the second side frame, and the linear motor is located inside the support frame. The two first clamping plates are spaced apart in a horizontal direction, and the sampling tube group is located between the two first clamping plates. The support frame has a support channel along the two first clamping plates toward the linear motor, wherein one of the first clamping plates is connected to one slide of the linear motor through one of the connecting rods, and the other first clamping plate is connected to the other slide of the linear motor through the other connecting rod. The controller is electrically connected to the linear motor, and the controller is used to control the linear motor to drive the two first clamping plates to move closer together through the two connecting rods, so that the two first clamping plates clamp and fix the connecting tube in the second tube group that is farthest from the injection end.

8. A high-efficiency field deep well bottom mud sampling device according to any one of claims 2-5, characterized in that, The frame is also provided with two fixing mechanisms, which are spaced apart. The sampling port is located between the two fixing mechanisms. The controller is electrically connected to the two fixing mechanisms and is used to drive the two fixing mechanisms to move horizontally toward the sampling port so that the two fixing mechanisms clamp and fix the sample storage tube or the connecting tube passing through the sampling port.

9. The high-efficiency field deep well bottom mud sampling device according to claim 8, characterized in that, The fixing mechanism includes a track, an electrically controlled slide, a connecting frame, and a second clamping plate. The track is disposed on the frame, and its extension trajectory passes through the sampling port along the vertical central axis. The extension trajectories of the two tracks coincide. The electrically controlled slide is slidably connected to the track. A connecting frame is disposed on the side of the electrically controlled slide away from the track, and a second clamping plate is disposed on the side of the connecting frame close to the sampling port. The controller is electrically connected to the two electrically controlled slides respectively. The controller is used to control the two electrically controlled slides to drive the second clamping plate connected to them to move towards the sampling port, so that the two second clamping plates clamp the sample storage tube or the connecting tube passing through the sampling port.

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