A deep-water sample collection device and method thereof

Abstract

The present invention provides a fixed-depth water sample collection device and a method thereof. The device includes a lifting component and a fixed-depth sampling component, one end of the lifting component is connected to the fixed-depth sampling component; the fixed-depth sampling component includes a sampler and a fixed-depth sealing component arranged at the sampling port of the sampler, and the fixed-depth sealing component is used to control the opening and closing of the sampling port of the sampler at a preset depth; the fixed-depth water sample collection device is connected to the lifting component through the fixed-depth sampling component, achieving the purpose of fixed-depth sampling and solving the problem of poor reliability of fixed-depth sampling when the drilling depth exceeds 100 meters mentioned in the prior art.

Description

Technical Field

[0001] The present invention belongs to the field of formation water sample collection, and particularly relates to a device and method for collecting deep water samples at a fixed depth. Background Art

[0002] In order to study and analyze the water quality change law of each aquifer in the formation, it is necessary to take fixed-depth samples from surface hydrographic observation wells.

[0003] At present, water level online monitoring devices are installed in surface hydrographic observation wells in Huainan Mining Area, and the drilling depth is several hundred meters deep. With the change of drilling depth, the water quality in the hole changes greatly, and it is necessary to take fixed-depth samples to analyze the water quality at different depths. In the prior art, fixed-depth sampling in the borehole is often carried out by relying on human hearing to judge the water depth. However, when the depth exceeds 100 meters, due to the very small sound, it is difficult for human hearing to distinguish, often resulting in poor reliability of fixed-depth sampling. Summary of the Invention

[0004] The present invention provides a device and method for collecting deep water samples at a fixed depth, which are used to overcome the problem of poor reliability of fixed-depth sampling when the drilling depth exceeds 100 meters mentioned in the prior art.

[0005] In a first aspect, an embodiment of the present invention provides a device for collecting deep water samples at a fixed depth, including: a lifting component and a fixed-depth sampling component, one end of the lifting component is connected to the fixed-depth sampling component;

[0006] The fixed-depth sampling component includes: a sampler and a fixed-depth sealing component arranged at the sampling port of the sampler, and the fixed-depth sealing component is used to control the opening and closing of the sampling port of the sampler at a preset depth.

[0007] For the device for collecting deep water samples at a fixed depth as described above, optionally, the fixed-depth sealing component includes an inlet end and an outlet end. Among them, a first sealing member capable of elastic deformation is arranged at the inlet end, and a second sealing member is arranged at the outlet end. The first sealing member is used to deform under a preset pressure to open the opening of the inlet end, and the second sealing member is used to control the closing of the opening of the outlet end.

[0008] For the device for collecting deep water samples at a fixed depth as described above, optionally, the first sealing member is an elastic member, and the second sealing member is a magnetic member.

[0009] For the device for collecting deep water samples at a fixed depth as described above, optionally, the fixed-depth sealing component includes an inlet member and an outlet member that are sleeved with each other and internally communicate. Among them, the outlet member is connected to the sampler, and the first sealing member is arranged at the internal opening of the inlet end of the inlet member, and the second sealing member is arranged at the outlet end of the outlet member.

[0010] For the deep-water sample collection device as described above, optionally, the sampling end of the sampling member has a round opening structure, and the sample outlet end of the sample outlet member has a flat opening structure.

[0011] For the deep-water sample collection device as described above, optionally, the outer surface of the sample outlet member is closely attached to the inner wall of the sampler, and a first flanging is provided at one end of the sample outlet member close to the sampling member, and the first flanging abuts against the inner wall or outer edge of the sampler;

[0012] A second flanging for limiting the sampling member is provided on the outer surface of the sampling member close to the sampling end.

[0013] For the deep-water sample collection device as described above, optionally, the lifting assembly includes: a rope with scales, a transmission group, a handle and a fixing bracket, wherein the transmission group is arranged on the fixing bracket, one end of the rope is connected to the transmission group, the other end of the rope is connected to the depth-fixed sampling assembly, and the handle is connected to the transmission group.

[0014] For the deep-water sample collection device as described above, optionally, it further includes: a guiding assembly, the guiding assembly is arranged at the top of the drilling sleeve, and the guiding assembly is used to guide the rope;

[0015] It further includes: a tensile force measuring member, and the tensile force measuring member is used to measure the tensile force on the rope during the collection process.

[0016] For the deep-water sample collection device as described above, optionally, the guiding assembly includes a pulley and a fixing member, the fixing member is used to fix the pulley at the top of the drilling sleeve, and the pulley is located directly above the cable reserved hole;

[0017] The fixing member includes: a fixing rod, a driving part, a fixing part and a moving part, wherein the pulley and the fixing part are arranged on the fixing rod, and the moving part is slidably arranged on the fixing rod under the drive of the driving part, so that the fixing rod is fixed on the drilling sleeve through the moving part and the fixing part.

[0018] In a second aspect, an embodiment of the present invention provides a collection method for deep-water sample collection, which uses the deep-water sample collection device as described above for collection. The method includes:

[0019] Put the depth-fixed sampling assembly in the deep-water sample collection device into the drilling sleeve through the lifting assembly in the deep-water sample collection device;

[0020] When the depth-fixed sampling assembly reaches a preset distance from the water surface, reduce the descending speed of the depth-fixed sampling assembly, and detect the tensile force on the lifting assembly within a predetermined period;

[0021] When the pulling force decreases, mark the rope scale in the lifting assembly as L1, and continue to lower the depth-fixed sampling assembly;

[0022] When the pulling force increases, mark the rope scale in the lifting assembly as L2, and lift the depth-fixed sampling assembly out of the drilling sleeve, and obtain the sampling depth according to the difference between L1 and L2.

[0023] A depth-fixed water sample collection device and method provided by the present invention, one end of the lifting assembly is connected to the depth-fixed sampling assembly. By providing a depth-fixed sealing assembly at the sampling port of the sampler of the depth-fixed sampling assembly, when the sampler reaches the preset depth in the drilling hole, under the action of the thrust of the water at the preset depth, the depth-fixed sealing assembly is used to control the opening of the sampling port of the sampler in the sampler; after sampling, the depth-fixed sealing assembly is used to control the closing of the sampling port of the sampler; Therefore, the depth-fixed water sample collection device provided in this embodiment achieves the purpose of depth-fixed sampling, and solves the problem of poor reliability of depth-fixed sampling when the drilling depth exceeds 100 meters mentioned in the prior art. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of a depth-fixed water sample collection device provided in Embodiment 1 of the present invention;

[0026] Figure 2 It is a schematic structural diagram of the depth-fixed sampling assembly provided in Embodiment 1 of the present invention

[0027] Figure 3 It is a schematic connection diagram of the lifting assembly and the fixed bracket in Embodiment 1 of the present invention;

[0028] Figure 4 It is a schematic structural diagram of the guiding assembly provided in Embodiment 2 of the present invention;

[0029] Figure 5 It is a schematic flow diagram of the collection method of the depth-fixed water sample collection device provided in Embodiment 3 of the present invention.

[0030] Description of the reference numerals:

[0031] 1: Handle;

[0032] 2: Transmission group;

[0033] 3: Fixed frame;

[0034] 4: Rope;

[0035] 5: Fixing piece;

[0036] 6: Drilling sleeve;

[0037] 7: Support frame;

[0038] 8: Sampler;

[0039] 9: Depth-fixed sealing assembly;

[0040] 10: Fixed plate;

[0041] 11: Cable reserved hole;

[0042] 12: Sample output part;

[0043] 13: Sample input part;

[0044] 14: First sealing piece;

[0045] 15: Second sealing piece;

[0046] 16: First flanging;

[0047] 17: Second flanging;

[0048] 18: Driving gear;

[0049] 19: Driven gear;

[0050] 20: Wire winding shaft;

[0051] 21: Hoop;

[0052] 22: Tightening piece;

[0053] 23: Pulley;

[0054] 24: Fixed rod;

[0055] 25: Fixed part;

[0056] 26: Moving part;

[0057] 27: Connecting part;

[0058] 28: Driving part. Detailed implementation manners

[0059] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0060] The terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned accompanying drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0061] To study and analyze the water quality change rules of each aquifer in the formation, it is necessary to conduct depth-fixed sampling on the ground hydrogeological observation wells. Currently, the ground hydrogeological observation wells in the Huainan Mining Area are all equipped with online water level monitoring devices, and the drilling depth is several hundred meters deep. As the drilling depth changes, the water quality in the borehole will also change greatly. Therefore, to study and analyze the water quality change rules of each aquifer in the formation, it is necessary to conduct depth-fixed sampling to analyze the water quality at different depths. However, in the prior art, depth-fixed sampling in the borehole is often carried out by relying on human hearing to judge the water depth. However, when the depth exceeds 100 meters, due to the very small sound, it is very difficult for human hearing to distinguish, often resulting in poor reliability of depth-fixed sampling. To achieve depth-fixed sampling in the borehole, the embodiments of the present invention provide a depth-fixed water sample collection device.

[0062] Embodiment 1

[0063] Figure 1 It is a schematic structural diagram of the depth-fixed water sample collection device provided in Embodiment 1 of the present invention.

[0064] The depth-fixed water sample collection device provided in this embodiment can be used for the collection of formation water samples, especially suitable for the collection of depth-fixed water samples in boreholes. The depth-fixed water sample collection device provided in this embodiment achieves the purpose of depth-fixed sampling when the drilling depth exceeds the depth distinguishable by the human ear, and solves the problem of poor reliability of depth-fixed sampling by the human ear when the drilling depth exceeds 100 meters in the prior art.

[0065] In the first aspect, as Figure 1 shown, the depth-fixed water sample collection device includes: a lifting component and a depth-fixed sampling component. One end of the lifting component is connected to the depth-fixed sampling component, and is used to lower the depth-fixed sampling component to a preset depth through the lifting component for water sample collection;

[0066] The depth-fixed sampling assembly includes: a sampler 8 and a depth-fixed sealing assembly 9 provided at the sampling port of the sampler 8. The depth-fixed sealing assembly 9 is used to control the opening and closing of the sampling port of the sampler 8 at a preset depth, avoiding the contamination of the sample taken at the preset depth by water samples at other depths, ensuring the purity of the water sample collected at the preset depth, and improving the accuracy and reliability of the taken sample.

[0067] Specifically, when the depth-fixed sampling assembly descends to the preset depth through the lifting assembly, the depth-fixed sealing assembly 9 closes the sampling port of the sampler 8 to prevent water samples at other depths from entering the sampler 8 and contaminating the taken sample; when the depth-fixed sampling assembly descends to the preset depth through the lifting assembly, the depth-fixed sealing assembly 9 opens the sampling port of the sampler 8, and the groundwater at the preset depth enters the sampler 8 through the depth-fixed sealing assembly 9 to collect the water sample at the preset depth. And after the sampling is completed, the depth-fixed sealing assembly 9 is used to control the closing of the sampling port of the sampler 8, thereby improving the accuracy and reliability of the taken sample.

[0068] Among them, in this embodiment, the sampler 8 includes a container with an accommodation cavity in any structural form, including but not limited to a sampling cylinder.

[0069] Among them, in this embodiment, the depth-fixed sealing assembly 9 may include a valve body that can be used to control the opening and closing of the sampling port of the sampler 8 at a preset depth or a structural member that can achieve the above functions. The valve body includes but not limited to a solenoid valve.

[0070] Therefore, for the depth-fixed water sample collection device provided in this embodiment, one end of the lifting assembly is connected to the depth-fixed sampling assembly, and a depth-fixed sealing assembly is provided at the sampling port of the sampler of the depth-fixed sampling assembly. In this way, when the sampler reaches the preset depth in the borehole, under the action of the thrust of the water at the preset depth, the depth-fixed sealing assembly controls the opening of the sampling port of the sampler inside the sampler; after the sampling is completed, the depth-fixed sealing assembly is used to control the closing of the sampling port of the sampler; therefore, the depth-fixed water sample collection device provided in this embodiment achieves the purpose of depth-fixed sampling and solves the problem of poor reliability of depth-fixed sampling when the borehole depth exceeds 100 meters mentioned in the prior art.

[0071] Figure 2 It is a schematic structural diagram of the depth-fixed sampling assembly provided in Embodiment 1 of the present invention.

[0072] Further, on the basis of the above embodiment, in this embodiment, as Figure 2As shown, the fixed-depth sealing assembly 9 includes a sample inlet end and a sample outlet end. Among them, the sample inlet end is provided with a first sealing member 14 that can undergo elastic deformation, and the sample outlet end is provided with a second sealing member 15. The first sealing member 14 is used to deform under a preset pressure to open the opening of the sample inlet end for collecting groundwater samples at a preset pressure or a preset depth. The second sealing member 15 is used to control the closing of the opening of the sample outlet end to close the sample outlet end after reaching the preset pressure and the sampling is completed, which can ensure the purity of the samples collected at the preset depth, thereby improving the accuracy and reliability of the samples taken.

[0073] Specifically, when the fixed-depth sampling assembly approaches the preset depth underwater, the fixed-depth sampling assembly continues to descend under the action of the lifting assembly. Due to the action of water pressure, the first sealing member 14 will be subjected to a certain pressure or thrust. When the pressure or thrust received reaches the preset pressure, under the action of water pressure, the first sealing member 14 will deform, causing the opening of the sample inlet end to open. Subsequently, the second sealing member 15 will control the opening of the sample outlet end to open under the action of water pressure for collecting water samples at a preset pressure. As the water sample enters the sampler 8, the air in the sampler 8 is gradually discharged, and the buoyancy received by the sampler 8 disappears. When the sampling is completed and the pressure difference inside and outside the sampler 8 is equal, the second sealing member 15 controls the opening of the sample outlet end to close, thereby improving the accuracy and reliability of the samples taken.

[0074] Among them, the water level depth in the drilling is monitored online by the water level online monitoring device. Calculate the thrust required for the preset depth according to the fact that the pressure of pure water is 1 kilogram per 9.8 meters. Use a thrust meter to test the thrust to push off the first sealing member 14. Measure multiple times and record the required thrust value within an error of 0.1 kilogram. Thus, change the size and thickness of the first sealing member 14 according to the magnitude of the thrust required for the preset depth.

[0075] Among them, in this embodiment, the first sealing member 14 can be an elastic member, and the second sealing member 15 can be a magnetic member. In this way, when the sampler 8 reaches the preset depth, the water pressure in the drilling sleeve causes the first sealing member 14 to undergo elastic deformation, so that the sampling end opening of the depth-fixed sealing assembly 9 is opened. In this way, the water sample to be measured enters from the sampling end. And under the action of the water sample to be measured, the second sealing member 15 is pushed open, so that the sample outlet opening is also opened at the same time. At this time, the water sample to be measured enters the sampler 8 from the depth-fixed sealing assembly 9. When the sampler 8 is filled with the water sample to be measured, at this time, the pressures inside and outside the sampler 8 are the same. At this time, the magnetic members attract each other, so that the sample outlet opening of the depth-fixed sealing assembly 9 is closed, while the sampling end opening remains open due to the deformation of the elastic member. Since the sample outlet opening of the depth-fixed sealing assembly 9 is in a closed state under the action of the attraction of the magnetic members, the water samples at other water depths cannot enter the sampler 8 during the rising process of the sampler 8, thus realizing the accurate sampling of the water sample at a fixed depth. Among them, in this embodiment, when the second sealing member 15 is a magnetic member, at this time, the magnetic member can be arranged on the outer wall of the sample outlet opening, or can be arranged on the inner wall of the sample outlet opening. The number of magnetic members arranged only needs to ensure that the sample outlet opening of the depth-fixed sealing assembly 9 is closed due to the attraction of the magnetic members.

[0076] Further, in this embodiment, the first sealing member 14 can be a silica gel sheet or other devices that can undergo elastic changes. Among them, in this embodiment, as Figure 2 shown, the first sealing member 14 is specifically a circular silica gel sheet. It should be noted that the first sealing member 14 can also be of other shapes, that is, in this embodiment, the shape of the second sealing member 14 includes but is not limited to being circular. Among them, in this embodiment, the structure of the second sealing member 15 can be a strip-shaped magnetic member, such as a bar magnet, or in this embodiment, the second sealing member 15 can be a sheet-shaped magnetic sheet. In this embodiment, when the second sealing member 15 is a magnetic member, the magnetic member includes but is not limited to a magnet or a magnetic sheet. In this embodiment, as long as it can ensure that the sample outlet opening of the depth-fixed sealing assembly 9 is closed when the magnetic members attract each other.

[0077] Further, based on the above embodiments, in this embodiment, the depth-fixed sealing assembly 9 includes a sampling member 13 and a deformable sampling member 12 that are sleeved with each other and communicate with each other inside. Among them, the sampling member 12 is connected to the sampler 8, and the first sealing member 14 is arranged on the inner opening of the sampling end of the sampling member 13 to control the opening or closing of the inner opening of the sampling end of the sampling member 13, thereby controlling the opening and closing of the sampling port of the sampler 8. The second sealing member 15 is arranged on the sampling end of the sampling member 12. In this embodiment, the second sealing member 15 is located on both sides of the sampling end and has a relatively small magnetism. When the first sealing member 14 deforms elastically under a preset pressure or thrust force to open the sampling end of the sampling member 13, the second sealing member 15 opens under the action of water pressure. When the pressure disappears, the second sealing members 15 on both sides close the sampling end of the sampling member 12.

[0078] Among them, in this embodiment, in order to facilitate the arrangement of the first sealing member 14 on the inner opening of the sampling end of the sampling member 13 and ensure uniform force under the preset pressure, the inner opening of the sampling end of the sampling member 13 is an annular opening. The bottom of the first sealing member 14 is exposed outside the sampling end of the sampling member 13, and its periphery is clamped on the sampling end of the sampling member 13 through the annular opening. The width of the sampling end affects the diameter and size of the first sealing member 14 under different thrust forces. In this embodiment, when the width of one side of the sampling end is 1 mm, the size and thickness of the first sealing member 14 under different thrust forces are described. Specifically, after multiple measurements, when the required thrust force is 2 kg, the diameter of the first sealing member 14 is 35 mm and the thickness is 2 mm; when the required thrust force is 3 kg, the diameter of the first sealing member 14 is 36 mm and the thickness is 2 mm; when the required thrust force is 3.5 kg, the diameter of the first sealing member 14 is 37 mm and the thickness is 2 mm; when the required thrust force is 4 kg, the diameter of the first sealing member 14 is 38 mm and the thickness is 2 mm.

[0079] Among them, in this embodiment, the sampling end of the sampling member 13 is a round opening structure, and the sampling end of the sampling member 12 is a flat opening structure. When the second sealing member 15 is a magnetic member, the magnetic member is more likely to automatically attract and close the sampling end of the sampling member 12. The second sealing member 15 is located on both sides of the sampling end of the sampling member 12. To prevent the sealing member from sliding down, the second sealing member 15 can be fixed on both sides of the sampling end of the sampling member 12, and the fixing methods include but are not limited to bonding.

[0080] Among them, in this embodiment, in order to prevent water from entering the sampler 8 from the connection gap between the sampling member 12 and the sampler 8, the outer surface of the sampling member 12 is closely attached to the inner wall of the sampler 8, and a first flanging 16 is provided at one end of the sampling member 12 close to the sampling member 13, and the first flanging 16 abuts against the inner wall or outer edge of the sampler 8;

[0081] To prevent the sample injector 13 from moving up and down within the sample outlet 12, a second flange 17 for limiting the sample injector 13 is provided on the outer surface of the sample injector 13 near the injection end. The sample injector 13 is relatively fixed vertically within the sample outlet 12 through the second flange 17.

[0082] Among them, in this embodiment, the sample outlet 12 is made of an elastic material, and the elastic material includes but is not limited to silica gel. Specifically, the sample outlet can be a silica gel barrel, or in this embodiment, the sample outlet can also be an elastic barrel or an elastic tubular structure that can deform when attracted by a magnetic part.

[0083] Among them, in this embodiment, the first flange 16 includes a flange structure adapted to the sampling port structure of the sampler 8, and the sample outlet 12 is closely attached to the inner wall or outer edge of the sampler 8 through the first flange 16 structure.

[0084] Among them, in this embodiment, when the sample injector 13 is assembled within the sample outlet 12, the sample injector 13 is embedded within the sample outlet 12 through the body of the sample injector 13 or the second flange 17, and the second flange 17 is located at the top of the first flange 16.

[0085] Among them, in this embodiment, the sample injector 13 includes a barrel-shaped structure made of a metal material, and the metal material includes but is not limited to iron. In this embodiment, the sample injector can specifically be an iron barrel.

[0086] Figure 3 It is a connection schematic diagram of the lifting assembly and the fixed bracket provided in the first embodiment of the present invention.

[0087] Furthermore, on the basis of the above embodiment, in this embodiment, as Figure 3 shown, the lifting assembly includes: a rope 4 with scales, a transmission group 2, a handle 1, and a fixed bracket. Among them, the transmission group 2 is provided on the fixed bracket, one end of the rope 4 is connected to the transmission group 2, the other end of the rope 4 is connected to the depth-fixed sampling assembly, and the handle 1 is connected to the transmission group 2. During use, by rotating the handle 1, the depth-fixed sampling assembly is lowered to a predetermined depth within the drill hole or lifted upward from the predetermined depth through the transmission group 2 and the rope 4.

[0088] Among them, in this embodiment, the transmission group 2, the rope 4, the handle 1, and the fixed bracket form a self-locking hand winch structure. To improve the sampling speed, the transmission group 2 includes a driving gear 18, a driven gear 19, and a winding shaft 20. The driven gear 19 meshes with the driving gear 18, and the driven gear 19 moves synchronously with the winding shaft 20. The rope 4 is wound around the winding shaft of the self-locking hand winch structure. When the handle 1 is rotated, driven by the transmission group 2, the depth-fixed sampling assembly is driven to descend or ascend within the drill hole through the rope 4.

[0089] Among them, in this embodiment, the fixed support includes a fixed frame 3, a support frame 7 and a fixing member 5. The transmission group 2 is fixed inside the fixed frame 3. The fixed frame 3 is fixed on the ground through the support frame 7, which plays a supporting role for the fixed frame 3 shown. The fixed frame 3 is also detachably connected to a drilling sleeve 6 located in the drilling hole through the fixing member 5.

[0090] Among them, in this embodiment, the support frame 7 includes but is not limited to a triangular support frame 7. One end of the fixing member 5 is fixedly or detachably connected to the fixed frame 3, and the other end is detachably connected to the drilling sleeve 6 through a hoop 21 and a tensioning member 22 passing through both ends of the hoop 21, which is convenient for the transportation of the sampling device and ensures the stability of the lifting assembly. The hoop 21 surrounds the outer wall of the drilling sleeve 6. When it is necessary to disassemble the fixing member 5 or remove the drilling sleeve 6, the tensioning member 22 is screwed out from both ends of the hoop 21. The tensioning member 22 is assembled at both ends of the hoop 21 and is threadedly connected to the hoop 21. Among them, in this embodiment, the hoop 21 is preferably two semi-circular steel rings, and the tensioning member 22 can be any one of a screw or a bolt.

[0091] Among them, in this embodiment, in order to facilitate the measurement of the tension on the lifting assembly, it further includes: a tension measuring member, which is used to measure the tension on the rope 4 during the sampling process. The change in the tension measured by the tension measuring member can accurately obtain the change in the position of the sampler 8 in the drilling sleeve. The scale on the rope 4 is marked according to the change in the tension, and finally the actual depth of the sample in the sampler 8 is obtained according to the scale mark on the rope 4, thus achieving the purpose of accurately measuring the actual depth of the obtained sample.

[0092] Among them, in this embodiment, the tension measuring member is preferably a tensiometer.

[0093] It should be noted that the lifting assembly in this embodiment is a very mature component in the prior art, and its specific position and connection relationship will not be further described in this embodiment.

[0094] Therefore, for the fixed-depth water sample collection device provided in this embodiment, one end of the lifting assembly is connected to the fixed-depth sampling assembly. By providing a fixed-depth sealing assembly 9 at the sampling port of the sampler 8 of the fixed-depth sampling assembly, when the sampler 8 reaches the preset depth in the drilling hole, under the action of the thrust of the water at the preset depth, the fixed-depth sealing assembly 9 is used to control the opening of the sampling port of the sampler 8 inside the sampler 8; after sampling, the fixed-depth sealing assembly 9 is used to control the closing of the sampling port of the sampler 8; therefore, the fixed-depth water sample collection device provided in this embodiment achieves the purpose of fixed-depth sampling and solves the problem of poor reliability of fixed-depth sampling when the drilling depth exceeds 100 meters mentioned in the prior art.

[0095] Embodiment Two

[0096] Figure 4 Schematic structural diagram of the guiding assembly provided in the second embodiment of the present invention.

[0097] Further, on the basis of the above embodiment, in this embodiment, as Figure 4 shown, in order to prevent the rope 4 from being entangled with other cables in the cable reserved hole 11 during the lifting process, the rope 4 needs to be inserted into the drilling hole from the center of the cable reserved hole 11. A fixing plate 10 is provided at the top end of the drilling sleeve 6, and the cable reserved hole 11 is opened on the fixing plate 10. In order to ensure that the depth-fixed sampling assembly can be inserted into the drilling hole from the center of the cable reserved hole 11, in this embodiment, it further includes: a guiding assembly, which is arranged at the top end of the drilling sleeve 6 and is used to guide the rope 4.

[0098] Among them, in this embodiment, the guiding assembly includes a pulley 23 and a fixing member 5. The fixing member 5 is used to fix the pulley 23 at the top end of the drilling sleeve 6, and the pulley 23 is located directly above the cable reserved hole 11, which is convenient for guiding the rope 4 to a certain extent; among them, the fixing member 5 includes: a fixing rod 24, a driving part 28, a fixing part 25 and a moving part 26. The pulley 23 and the fixing part 25 are arranged on the fixing rod 24, and the moving part 26 is slidably arranged on the fixing rod 24 under the drive of the driving part 28, so that the fixing rod 24 fixes the roller on the drilling sleeve 6 through the moving part 26 and the fixing part 25, and the roller is located at the center position of the cable reserved hole 11.

[0099] Among them, in this embodiment, the fixing part 25 and the roller are sleeved on the fixing rod 24 and are detachably connected to the fixing rod 24. The driving part 28 is assembled at the end of the fixing rod 24 through the connecting part 27, and the driving part 28 is threadedly connected to the connecting part 27; a side wall of the drilling sleeve 6 is located between the fixing part 25 and the moving part 26. By rotating the driving part 28, the moving part 26 is pushed to move towards the fixing part 25 on the fixing rod 24, thereby clamping the drilling sleeve 6; on the contrary, when it is necessary to remove the guiding assembly from the drilling sleeve 6, it can be achieved by rotating the driving part 28 in the opposite direction, making the installation and removal of the guiding assembly from the drilling sleeve 6 more convenient.

[0100] Among them, in this embodiment, the driving part 28 is preferably a crank, and the connecting part 27 and the fixing rod 24 can be of a split structure or an integral structure. When the connecting part 27 and the fixing rod 24 are of an integral structure, the connecting part 27 and the fixing rod 24 are a whole structure.

[0101] Embodiment Three

[0102] Figure 5 Schematic diagram of the collection method process of the depth-fixed water sample collection device provided in the third embodiment of the present invention.

[0103] This embodiment provides a sampling method for collecting deep water samples, which uses the deep water sample collection device described in any of the above embodiments for collection. As Figure 5 shown, the method includes:

[0104] Step 101: Put the depth sampling component in the deep water sample collection device into the drilling sleeve 6 through the lifting component in the deep water sample collection device, so as to facilitate the collection of groundwater samples in the drilling;

[0105] Step 102: When the depth sampling component reaches a preset distance from the water surface, reduce the descending speed of the depth sampling component, and detect the tension on the lifting component within a predetermined period. The tension is the total weight of the rope 4 and the depth sampling component;

[0106] Step 103: When the tension decreases, mark the scale of the rope 4 in the lifting component as L1, and continue to lower the depth sampling component;

[0107] Step 104: When the tension increases, mark the scale of the rope 4 in the lifting component as L2, and lift the depth sampling component out of the drilling sleeve 6, and obtain the sampling depth according to the difference between L1 and L2.

[0108] Among them, in this embodiment, the preset distance is preferably 10 meters. When the depth sampling component descends to a preset distance from the water surface, reduce the descending speed of the depth sampling component, and measure the total weight of the rope 4 and the depth sampling component every few meters with a tension measuring piece. When the depth sampling component enters the water, due to the buoyancy of the water, the detected tension will decrease. At this time, mark and record the scale of the rope 4 in the lifting component as L1, and stop detection (i.e., a predetermined period). Then continue to lower the depth sampling component to the preset distance (the first ten meters of the expected depth), and again measure the total weight of the rope 4 and the depth sampling component every few meters with a tension measuring piece. When the water pressure presses open the first sealing piece 14, the water will simultaneously press open the second sealing piece 15 and enter the sampler 8. The pressure inside the sampler 8 increases. At this time, the air in the sampler 8 will be discharged from the sampler 8 through the gap between the sampler 8 and the sample outlet piece 12. When the air in the sampler 8 is discharged and the buoyancy disappears, the tension detected by the tension measuring piece will increase. At this moment, mark the scale of the rope 4 in the lifting component as L2, and lift the depth sampling component out of the drilling sleeve 6 through the lifting component, and obtain the sampling depth according to the difference between L1 and L2. Among them, when the sampling is completed, the pressure difference inside and outside the sampler 8 is equal, and the two second sealing pieces 15 at the sample outlet end of the sample outlet piece 12 seal the sample outlet end of the sample outlet piece 12 by magnetic force, avoiding other depth water samples from entering the sampler 8 during the rising process of the depth sampling component, causing pollution to the samples taken at the preset depth, and improving the accuracy and reliability of the samples taken.

[0109] The sampling method for fixed-depth water samples provided by the embodiments of the present invention achieves the purpose of fixed-depth sampling. This method can be used for fixed-depth sampling when the drilling depth exceeds 100 meters and has high reliability.

[0110] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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 should not be construed as a limitation to the present invention.

[0111] In the description of the present invention, it should be understood that the terms "including" and "having" used herein and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or devices.

[0112] Unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the terms "first", "second", etc. are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A deep-water water sample collection device, characterized in that: It includes a lifting component and a depth-fixed sampling component, and one end of the lifting component is connected to the depth-fixed sampling component; The depth-fixed sampling component includes: a sampler and a depth-fixed sealing component provided at the sampling port of the sampler, and the depth-fixed sealing component is used to control the opening and closing of the sampling port of the sampler at a preset depth; The depth-fixed sealing component includes a sampling inlet component and a sampling outlet component that are sleeved with each other and communicate with each other inside. The sampling inlet component is provided with a sampling inlet end, and the sampling inlet end is provided with a first sealing component that can elastically deform. Among them, the first sealing component is provided on the inner opening of the sampling inlet end of the sampling inlet component, and the bottom of the first sealing component leaks outside the sampling inlet end of the sampling inlet component. The first sealing component is used to deform under a preset pressure to open the opening of the sampling inlet end; The sampling outlet component is provided at the sampling outlet end, and the sampling outlet end is provided with a second sealing component. The second sealing component is used to control the closing of the opening of the sampling outlet end. The second sealing component is provided on both sides of the sampling outlet end of the sampling outlet component; the sampling inlet component is arranged inside the sampling outlet component. Among them, the sampling outlet component is connected to the sampler. After the sampling inlet end is opened, under the action of water pressure, the second sealing component controls the opening of the sampling outlet end. When the internal and external pressure differences of the sampler are equal, the second sealing component closes the sampling outlet end of the sampling outlet component.

2. The deep-water water sample collection device according to claim 1, wherein: The first sealing component is an elastic component, and the second sealing component is a magnetic component.

3. The water sample collecting device for fixed depth according to claim 2, wherein: The sampling inlet end of the sampling inlet component is of a round opening structure, and the sampling outlet end of the sampling outlet component is of a flat opening structure.

4. The deep-water water sample collection device according to claim 3, characterized in that: The outer surface of the sampling outlet component is closely attached to the inner wall of the sampler, and a first flanging is provided at one end of the sampling outlet component close to the sampling inlet component, and the first flanging abuts against the inner wall or outer edge of the sampler; A second flanging for limiting the sampling inlet component is provided on the outer surface of the sampling inlet component near the sampling inlet end.

5. A deep water sample collection device according to any one of claims 1-4, characterized in that: The lifting component includes: a rope with scales, a transmission group, a handle and a fixed bracket. Among them, the transmission group is arranged on the fixed bracket, one end of the rope is connected to the transmission group, the other end of the rope is connected to the depth-fixed sampling component, and the handle is connected to the transmission group.

6. The deep-water water sample collection device according to claim 5, characterized in that: It also includes: A guiding component, which is arranged at the top of the drilling sleeve, and the guiding component is used to guide the rope; It also includes: a tensile force measuring component, and the tensile force measuring component is used to measure the tensile force on the rope during the acquisition process.

7. The water sample collecting device for fixed depth according to claim 6, characterized in that: The guiding component includes a pulley and a fixing component. The fixing component is used to fix the pulley at the top of the drilling sleeve, and the pulley is located directly above the cable reserved hole; The fixing component includes: a fixing rod, a driving part, a fixing part and a moving part. Among them, the pulley and the fixing part are arranged on the fixing rod, and the moving part is slidably arranged on the fixing rod under the drive of the driving part, so that the fixing rod is fixed on the drilling sleeve through the moving part and the fixing part.

8. A sampling method for collecting deep-water samples, which is carried out by using the deep-water sample collection device described in any one of the above claims 1-7, and is characterized in that: The method includes: Put the depth-fixed sampling component in the depth-fixed water sample collection device into the drilling sleeve through the lifting component in the depth-fixed water sample collection device; When the depth-fixed sampling assembly reaches a preset distance from the water surface, reduce the descending speed of the depth-fixed sampling assembly and detect the tension on the lifting assembly within a predetermined period; When the tension decreases, mark the rope scale in the lifting assembly as L1 and continue to lower the depth-fixed sampling assembly; When the tension increases, mark the rope scale in the lifting assembly as L2, lift the depth-fixed sampling assembly out of the drilling sleeve, and obtain the sampling depth according to the difference between L1 and L2.

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