Sediment interstitial water detection device

Abstract

The utility model discloses a sediment interstitial water detection device, which relates to the technical field of near seawater environment detection, and comprises an inner pipe which is a solid permeable core pipe and is provided with an inner pipe water seepage seam from top to bottom in an inclined manner; the inner pipe is sleeved with the outer pipe, the top of the inner pipe is located below the top of the outer pipe, the bottom of the outer pipe is detachably connected with a conical drill bit, an outer pipe water seepage seam is vertically formed from the top to the bottom, and an interstitial water sampling opening is formed in the intersection of the inner pipe water seepage seam and the outer pipe water seepage seam; the water permeable membrane is arranged between the inner pipe and the outer pipe; the driving assembly is arranged at the top of the cavity of the outer pipe and used for driving the inner pipe to rotate relative to the outer pipe; and the detection assembly communicates with a water outlet formed in the top of the outer pipe through a negative pressure pipe and is used for sucking interstitial water flowing through the top of the inner pipe for detection. According to the sediment interstitial water detection device, the technical problem that an existing interstitial water detection device cannot carry out fixed-depth sampling detection is solved, and layered fixed-depth sampling detection on sediment interstitial water of different depths is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore seawater environment detection, in particular to a sediment interstitial water detection device. Background Art

[0002] Due to the significant impact of human activities on the offshore area, a large amount of suspended particulate matter enters the ocean. When the suspended matter entering the ocean settles to the seabed, it begins to become loose and distributed in layers. After diagenesis such as compaction, cementation and recrystallization, the consolidation state and composition of deep sediments are different from those of the surface layer, and the composition of interstitial water in the sediments also varies with the depth of deposition.

[0003] Sediment interstitial water contains various chemical substances, such as nutrient elements, toxic heavy metals, soluble organic matter, etc. The movement of interstitial water is closely related to the migration, release and transformation of pollutants, so the study of interstitial water in the water environment is of great significance.

[0004] At present, most methods for detecting the physical and chemical properties of interstitial water are to use interstitial water samplers to obtain interstitial water and then transport it back to the laboratory for measurement through interstitial water detection devices. However, most existing interstitial water detection devices collect and detect interstitial water from the entire sediment profile and are unable to perform fixed-depth sampling and detection.

[0005] Therefore, how to provide a sediment interstitial water detection device that can detect sediment interstitial water at different depths is a technical problem that those skilled in the art currently need to solve. Utility Model Content

[0006] The utility model aims to provide a sediment interstitial water detection device, which solves the technical problem that the existing interstitial water detection device cannot perform fixed-depth sampling detection.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a sediment interstitial water detection device, comprising:

[0008] The inner tube is a solid water-permeable core tube, and an inner tube water seepage seam is obliquely arranged from the top to the bottom of the outer circumference of the inner tube;

[0009] The outer tube has one end set as an opening and is sleeved on the outside of the inner tube. The top of the inner tube is located below the top of the outer tube. The bottom of the outer tube is detachably connected to a conical drill bit. An outer tube seepage seam is vertically set from the top to the bottom of the outer tube shell. The outer tube seepage seam is arranged opposite to the inner tube seepage seam. The intersection of the inner tube seepage seam and the outer tube seepage seam is a gap water sampling port.

[0010] A water-permeable membrane is disposed between the inner tube and the outer tube;

[0011] A driving assembly, disposed at the top of the cavity of the outer tube, for driving the inner tube to rotate relative to the outer tube to adjust the depth of the interstitial water sampling port;

[0012] The detection component is connected to the water outlet arranged at the top of the outer tube through a negative pressure tube, and is used for sucking the gap water flowing through the top of the inner tube for detection.

[0013] Preferably, the drive assembly comprises:

[0014] A fixing member, fixedly arranged on the outer peripheral surface of the outer tube, can keep the outer tube and the sediment fixed;

[0015] A driving motor is fixedly mounted at the top edge of the outer tube cavity, and a driving gear is arranged on the output shaft of the driving motor;

[0016] The inner gear ring is fixedly arranged on the top of the inner tube, and the inner wall of the inner gear ring is provided with a gear ring matched with the driving gear.

[0017] Preferably, the fixing member comprises:

[0018] An annular plate, fixedly mounted on the outer circumference of the outer tube, the annular plate and the inner tube being at the same height;

[0019] A plurality of fixed anchors are evenly arranged on the lower end surface of the annular plate.

[0020] Preferably, half of the inner wall of the inner gear ring is set as the gear ring, and the other half is set as an arc block, the inner tube water seepage seam is set on the outer peripheral surface of the inner tube located on one side of the arc block, and the line connecting the head end and the tail end of the inner tube water seepage seam on the vertical projection plane coincides with the line connecting the head end and the tail end of the arc block on the vertical projection plane, so as to limit the rotation range of the inner tube to 0-180°, so that the inner tube water seepage seam and the outer tube water seepage seam always have an intersection.

[0021] Preferably, the detection component comprises:

[0022] A box body, in which a first cavity and a second cavity are provided, a transmission hole is provided between the first cavity and the second cavity, the box body is provided with a water inlet connected to the first cavity and located below the transmission hole, the box body is provided with a drain connected to the second cavity, one end of the negative pressure tube is detachably connected to the water outlet, and the other end is detachably connected to the water inlet;

[0023] A sensor unit, disposed in the first cavity, for detecting interstitial water in the first cavity;

[0024] A peristaltic pump is disposed in the second cavity, the input end of the peristaltic pump is connected to the transmission hole, and the output end of the peristaltic pump is connected to the drain port, and the peristaltic pump is used to generate vacuum negative pressure;

[0025] A battery pack is electrically connected to the drive motor, the sensor unit and the peristaltic pump.

[0026] Preferably, the sensor unit includes a temperature electrode, a pH electrode, a DO electrode, a salinity electrode and an Eh electrode.

[0027] Preferably, the top of the box body is provided with a cleaning hole communicating with the first cavity, and a sealing cover for sealing the cleaning hole.

[0028] Preferably, the water outlet and the water inlet are both provided with internal threads, and both ends of the negative pressure tube are provided with external threads matching with the internal threads.

[0029] Preferably, it also includes a control panel and a display screen, wherein the display screen establishes a signal connection with the control panel, and the control panel correspondingly establishes a signal connection with the drive motor, the peristaltic pump, the temperature electrode, the pH electrode, the DO electrode, the salinity electrode and the Eh electrode.

[0030] Preferably, an anti-blocking plow is provided on the outer tube, and the anti-blocking plow is located at the bottom of the water seepage seam of the outer tube.

[0031] Compared with the above background technology, the sediment interstitial water detection device provided by the utility model has the following beneficial effects:

[0032] The conical drill bit is inserted into the sediment, and the operator rotates the inner tube through the driving assembly to adjust the alignment position between the inner tube seepage seam and the outer tube seepage seam. Since the inner tube seepage seam is set at an angle, rotating the inner tube can change the vertical position of the interstitial water sampling port. Through adjustment, the operator can position the interstitial water sampling port to the required sediment depth, thereby ensuring that interstitial water samples are collected from this depth; when the interstitial water sampling port is adjusted to the required depth, the detection assembly starts to work, and using the negative pressure principle, the detection assembly draws interstitial water from the water outlet at the top of the outer tube through the negative pressure tube, and the collected interstitial water samples are then sent to the detection assembly for further analysis and detection, thereby realizing the stratified fixed-depth sampling and detection of interstitial water in sediments at different depths, which not only improves the accuracy of sampling, but also provides reliable data support for subsequent detection and analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0034] FIG1 is a schematic structural diagram of a sediment interstitial water detection device provided by an embodiment of the utility model;

[0035] FIG2 is a schematic diagram of the installation of the inner gear ring provided in an embodiment of the utility model;

[0036] FIG3 is a partial enlarged schematic diagram of FIG1 ;

[0037] FIG. 4 is a schematic diagram of the structure of a detection component provided in an embodiment of the present utility model.

[0038] in:

[0039] 1-inner tube, 2-inner tube seepage seam, 3-outer tube, 4-conical drill bit, 5-outer tube seepage seam, 6-gap water sampling port, 7-permeable membrane, 8-negative pressure tube, 9-water outlet, 10-driving motor, 11-driving gear, 12-inner gear ring, 13-gear ring, 14-annular plate, 15-fixed anchor, 16-arc block, 17-box, 18-first cavity, 19-second cavity, 20-transmission hole, 21-water inlet, 22-drainage outlet, 23-peristaltic pump, 24-battery pack, 25-temperature electrode, 26-pH electrode, 27-DO electrode, 28-salinity electrode, 29-Eh electrode, 30-sealing cover, 31-control panel, 32-display screen, 33-anti-blocking plow. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] Referring to Figure 1, a sediment interstitial water detection device provided by the present application includes an inner tube 1, which is a solid permeable core tube, and an inner tube seepage slit 2 is obliquely arranged from the top to the bottom of the outer circumferential surface of the inner tube 1; an outer tube 3, one end of which is set as an opening and is sleeved on the outside of the inner tube 1, the top of the inner tube 1 is located below the top of the outer tube 3, and the bottom of the outer tube 3 is detachably connected to a conical drill bit 4, and an outer tube seepage slit 5 is vertically arranged from the top to the bottom of the outer tube 3 shell, the outer tube seepage slit 5 is arranged opposite to the inner tube seepage slit 2, and the intersection of the inner tube seepage slit 2 and the outer tube seepage slit 5 is a interstitial water sampling port 6; a permeable membrane 7 is arranged between the inner tube 1 and the outer tube 3; a driving component is arranged at the top of the cavity of the outer tube 3, and is used to drive the inner tube 1 to rotate compared with the outer tube 3 to adjust the depth of the interstitial water sampling port 6; a detection component is connected to the water outlet 9 arranged at the top of the outer tube 3 through a negative pressure tube 8, and is used to suck the interstitial water flowing through the top of the inner tube 1 for detection.

[0043] That is to say, the inner tube 1 is a solid permeable core tube, and its outer surface is covered with a permeable membrane 7, which is used to filter solid particles in the sediment to ensure the purity of the collected interstitial water. The outer surface of the inner tube 1 is inclined from top to bottom with an inner tube seepage seam 2, and the outer tube 3 is sleeved on the outside of the inner tube 1 with a gap fit. A vertical outer tube seepage seam 5 is provided on the shell of the outer tube 3. The intersection of the inner tube seepage seam 2 and the outer tube seepage seam 5 forms an interstitial water sampling port 6. A large amount of water at the depth of the interstitial water sampling port 6 can pass through the permeable membrane 7 to enter the interior of the inner tube 1.

[0044] The bottom of the outer tube 3 is connected to a solid conical drill bit 4, which facilitates the insertion of the outer tube 3 into the sediment and sampling.

[0045] The drive assembly is installed at the top of the outer tube 3 cavity and is responsible for driving the inner tube 1 to rotate relative to the outer tube 3 to adjust the depth of the interstitial water sampling port 6, allowing the operator to adjust the depth of the interstitial water sampling port 6 according to actual needs, thereby collecting interstitial water in sediments at different depths.

[0046] The detection component is connected to the water outlet 9 arranged at the top of the outer tube 3 through the negative pressure tube 8. The detection component uses the negative pressure principle to suck the gap water flowing through the top of the inner tube 1 for detection.

[0047] Working principle:

[0048] The conical drill bit 4 is inserted into the sediment so that the outer tube 3 is located in the sediment. The operator rotates the inner tube 1 through the driving assembly to adjust the alignment between the inner tube seepage slit 2 and the outer tube seepage slit 5. Since the inner tube seepage slit 2 is set at an angle, the rotation of the inner tube 1 can change the vertical position of the interstitial water sampling port 6. Through adjustment, the operator can position the interstitial water sampling port 6 to the required sediment depth, thereby ensuring that the interstitial water sample is collected from this depth; when the interstitial water sampling port 6 is adjusted to the required depth, the detection assembly starts to work. Using the negative pressure principle, the detection assembly sucks interstitial water from the water outlet 9 at the top of the outer tube 3 through the negative pressure tube 8, and the collected interstitial water sample is then sent to the detection assembly for further analysis and detection.

[0049] Therefore, a sediment interstitial water detection device provided in the present application adjusts the depth of the interstitial water sampling port 6 by rotating the inner tube 1, thereby realizing stratified fixed-depth sampling and detection of interstitial water in sediments of different depths, which not only improves the sampling accuracy, but also provides reliable data support for subsequent detection and analysis.

[0050] Specifically, the conical drill bit 4 matches the internal thread at the bottom of the outer tube 3 through its external thread, forming a tight and stable connection.

[0051] The threaded connection is not only simple and easy, but also can ensure that the conical drill bit 4 will not loosen or fall off when inserted into the sediment, thereby ensuring the accuracy and safety of sampling. In addition, since the conical drill bit 4 is threadedly connected to the outer tube 3, the outer tube 3 (together with the inner tube 1 and the water-permeable membrane 7) can be easily unscrewed from the conical drill bit 4, and then the water-permeable membrane 7 can be replaced.

[0052] Specifically, the inner tube 1, the outer tube 3 and the conical drill bit 4 are all made of seawater corrosion-resistant stainless steel, the thickness of the outer tube 3 is in the range of 2-3mm, the diameter of the inner tube 1 is slightly smaller than the aperture of the outer tube 3, the water-permeable membrane 7 uses a 0.45um water-permeable membrane, the width of the outer tube seepage seam 5 and the inner tube seepage seam 2 are both in the range of 1-2mm, the aperture of the water outlet 9 is in the range of 5-10mm, and the negative pressure tube 8 is a silicone hard tube.

[0053] On the basis of the above embodiments, referring to FIGS. 1-3 , the driving assembly includes a fixing part, which is fixedly mounted on the outer peripheral surface of the outer tube 3, so that the outer tube 3 and the sediment can be kept fixed, and the fixing part includes an annular plate 14, which is fixedly mounted on the outer peripheral surface of the outer tube 3, and the annular plate 14 and the inner tube 1 are located at the same height position; a fixing anchor 15, and a plurality of fixing anchors 15 are evenly arranged on the lower end surface of the annular plate 14; a driving motor 10, which is fixedly mounted at the top edge of the cavity of the outer tube 3, and a driving gear 11 is arranged on the output shaft of the driving motor 10; an inner gear ring 12, which is fixedly mounted on the top of the inner tube 1, and a gear ring 13 cooperating with the driving gear 11 is arranged on the inner wall of the inner gear ring 12.

[0054] Specifically, the fixing member ensures that the outer tube 3 remains fixed in the sediment to prevent the outer tube 3 from moving or tilting when the inner tube 1 is rotated. The annular plate 14 is fixed to the outer peripheral surface of the top of the outer tube 3, providing a stable support surface for installing the fixing anchor 15, which can be inserted into the sediment to increase the stability of the outer tube 3. Specifically, the annular plate 14 and the fixing anchor 15 are hard plastic.

[0055] The driving motor 10 is fixed at the top edge of the outer tube 3 cavity to provide power for the rotation of the inner tube 1; the inner gear ring 12 is fixed at the top of the inner tube 1, and the outer diameter of the inner gear ring 12 is the same as the outer diameter of the inner tube 1, and the material of the inner gear ring 12 is stainless steel that is resistant to seawater corrosion.

[0056] Working principle:

[0057] Fixing the outer pipe 3 : The fixing anchor 15 is firmly fixed in the sediment under the pressure of the sediment, and the annular plate 14 provides additional support to ensure the stability of the outer pipe 3 .

[0058] Rotate the inner tube 1: start the drive motor 10, the drive gear 11 starts to rotate and meshes with the gear ring 13 of the inner gear ring 12. Since the inner gear ring 12 is fixed to the top of the inner tube 1, the rotation of the drive gear 11 will drive the inner tube 1 to rotate relative to the outer tube 3.

[0059] Adjusting the interstitial water sampling port 6: By rotating the inner tube 1, the alignment between the inner tube seepage seam 2 and the outer tube seepage seam 5 can be changed, thereby adjusting the position of the interstitial water sampling port 6. The operator can position the interstitial water sampling port 6 to the desired sediment depth according to actual needs.

[0060] Collecting interstitial water: When the interstitial water sampling port 6 is adjusted to the required depth, the detection component starts to work, and uses the negative pressure principle to suck the interstitial water flowing through the top of the inner tube 1 for detection.

[0061] On the basis of the above-mentioned embodiment, referring to Figures 1 and 2, half of the inner wall of the inner gear ring 12 is set as the gear ring 13, and the other half is set as the arc block 16. The inner tube seepage seam 2 is set on the outer peripheral surface of the inner tube 1 located on one side of the arc block 16, and the line connecting the head end and the tail end of the inner tube seepage seam 2 on the vertical projection plane coincides with the line connecting the head end and the tail end of the arc block 16 on the vertical projection plane, so as to limit the rotation range of the inner tube 1 to 0-180°, so as to realize that the inner tube seepage seam 2 and the outer tube seepage seam 5 always have an intersection.

[0062] That is to say, the inner wall of the inner gear ring 12 is divided into two parts, one half is designed as a gear ring 13 for achieving precise meshing with the driving gear 11; the other half is designed as a smooth arc block 16 without meshing teeth, which serves to limit the rotation range of the inner tube 1.

[0063] Due to the presence of the arc block 16, the rotation range of the inner tube 1 is strictly limited to between 0-180°, and the inner tube seepage seam 2 is arranged on the outer peripheral surface of the inner tube 1 located on one side of the arc block 16. The line connecting the head and tail ends of the inner tube seepage seam 2 on the vertical projection plane coincides with the line connecting the head and tail ends of the arc block 16 on the vertical projection plane, ensuring that the inner tube seepage seam 2 can always intersect with the outer tube seepage seam 5 during the rotation process, thereby forming an effective interstitial water sampling port 6.

[0064] The length of the inner tube 1 is set to 100 cm, while the length of the outer tube 3 is slightly longer, 105 cm, which ensures that the inner tube 1 has sufficient rotation space and that the outer tube 3 can provide sufficient stability and protection when inserted into the sediment.

[0065] When the head end of the toothed ring 13 contacts the driving gear 11, the interstitial water sampling port 6 is located at the top of the inner tube 1, and the depth is 0 cm. As the inner tube 1 rotates, the sampling port gradually descends. When the inner tube 1 rotates 180°, the tail end of the toothed ring 13 contacts the driving gear 11, and the sampling port has reached the bottom of the inner tube 1, and the depth reaches 100 cm.

[0066] Furthermore, not only the position of the interstitial water sampling port 6 is controlled, but also the flexibility and accuracy of sampling are improved. The operator only needs to adjust the rotation angle of the inner tube 1 to easily select the desired sampling depth.

[0067] On the basis of the above embodiment, an anti-blocking plow 33 is provided on the outer tube 3, and the anti-blocking plow 33 is located at the bottom of the outer tube seepage slit 5, that is, when the outer tube 3 is inserted into the sediment, the anti-blocking plow 33 will first contact the sediment, and as the outer tube 3 goes deeper, the anti-blocking plow 33 will continuously scrape the surface of the sediment to remove the sediment particles that may block the outer tube seepage slit 5. At the same time, since the anti-blocking plow 33 is located below the seepage slit, the sediment around the seepage slit can be continuously cleaned during the sampling process to ensure the smooth progress of the sampling process.

[0068] On the basis of the above embodiments, referring to FIG. 1 and FIG. 4 , the detection assembly includes a housing 17, in which a first cavity 18 and a second cavity 19 are provided, a transmission hole 20 is provided between the first cavity 18 and the second cavity 19, the housing 17 is provided with a water inlet 21 connected to the first cavity 18 and located below the transmission hole 20, the housing 17 is provided with a drain 22 connected to the second cavity 19, one end of the negative pressure tube 8 is detachably connected to the water outlet 9, and the other end is detachably connected to the water inlet 21; a sensor unit is provided in the first cavity 18, and is used to detect interstitial water in the first cavity 18; a peristaltic pump 23 is provided in the second cavity 19, the input end of the peristaltic pump 23 is connected to the transmission hole 20, and the output end is connected to the drain 22, and the peristaltic pump 23 is used to generate vacuum negative pressure; a battery pack 24 is electrically connected to the drive motor 10, the sensor unit and the peristaltic pump 23.

[0069] Specifically, the water inlet 21 is arranged on the box body 17 and connected to the first cavity 18, and is located below the transmission hole 20, so as to facilitate the gap water to enter the first cavity 18 from the outside, and the drain port 22 is connected to the second cavity 19 for discharging the gap water after detection.

[0070] The sensor unit is arranged in the first cavity 18, and the sensor unit can monitor various parameters of the interstitial water in the first cavity 18 in real time; the peristaltic pump 23 is arranged in the second cavity 19, and the input end of the peristaltic pump 23 is connected with the transmission hole 20, and the output end is connected with the drain port 22. The peristaltic pump 23 can effectively suck the interstitial water flowing through the top of the inner tube 1 into the first cavity 18 by generating a vacuum negative pressure, and then suck the interstitial water in the first cavity 18 into the second cavity 19, and discharge it after detection.

[0071] Based on the above embodiment, the sensor unit includes a temperature electrode 25 , a pH electrode 26 , a DO electrode 27 , a salinity electrode 28 and an Eh electrode 29 .

[0072] That is to say, the temperature electrode 25 is used to measure the temperature of interstitial water, which is crucial for understanding the rate of biochemical reactions in water bodies, the solubility of substances and the adaptability of organisms; the pH electrode 26 is used to measure the acidity and alkalinity (pH value) of interstitial water, which is an important indicator for evaluating the chemical properties of water bodies, the state of biological activity and the transformation of pollutants; the DO electrode 27 (dissolved oxygen electrode) is used to measure the dissolved oxygen content in interstitial water, which is a key parameter reflecting the ecological health of water bodies, biological respiration activities and the decomposition rate of organic matter; the salinity electrode 28 is used to measure the salinity of interstitial water, that is, the total amount of salt substances dissolved in water, which is of great significance for understanding the ion composition, osmotic pressure and adaptability of organisms to salinity of water bodies; the Eh electrode 29 (redox potential electrode) is used to measure the redox potential (Eh value) of interstitial water, which is an important indicator reflecting the ability and direction of redox reactions in water bodies, evaluating the degree of water pollution and predicting the trend of pollutant transformation.

[0073] On the basis of the above-mentioned embodiment, the water outlet 9 and the water inlet 21 are both provided with internal threads, and both ends of the negative pressure tube 8 are provided with external threads matching with the internal threads; that is, the negative pressure tube 8 is a component connecting the water outlet 9 and the water inlet 21, and both ends thereof are equipped with external threads matching with the internal threads of the water outlet 9 and the water inlet 21, so that the negative pressure tube 8 can be firmly connected to the water outlet 9 and the water inlet 21, and the threaded connection enables the negative pressure tube 8 to be easily installed and disassembled without the use of additional tools.

[0074] Based on the above embodiment, a cleaning hole connected to the first cavity 18 is provided at the top of the box body 17, and a sealing cover 30 for sealing the cleaning hole is provided. That is to say, when the detection is completed, the power supply can be turned off, the negative pressure tube 8 can be twisted open to pour out the residual gap water, and finally the cleaning hole can be opened to clean the electrode of the sensor unit.

[0075] Based on the above embodiment, referring to FIG1 , a control panel 31 and a display screen 32 are also included. The display screen 32 establishes a signal connection with the control panel 31 , and the control panel 31 establishes a signal connection with the drive motor 10 , the peristaltic pump 23 , the temperature electrode 25 , the pH electrode 26 , the DO electrode 27 , the salinity electrode 28 and the Eh electrode 29 .

[0076] That is, the control panel 31 serves as an interface for the user to interact with the system, allowing the operator to input instructions, set parameters, or start / stop the operation of the device. In this embodiment, the control panel 31 establishes signal connections with the drive motor 10, the peristaltic pump 23, and each sensor electrode (temperature electrode 25, pH electrode 26, DO electrode 27, salinity electrode 28, Eh electrode 29), so that the operator can directly control the operating status of the drive motor 10 and the peristaltic pump 23 through the control panel.

[0077] In this embodiment, the display screen 32 establishes a signal connection with the control panel 31, and can display in real time the instructions input by the control panel 31, the set parameters and the measurement results of each sensor electrode. In this way, the operator can intuitively understand the operating status and measurement results of the system, and make corresponding adjustments or decisions.

[0078] Specifically, when the interstitial water data of a certain depth is read, the operator can control the operation of the drive motor 10 through the operation keyboard on the control panel 31. The rotation of the drive motor 10 will drive the rotation of the inner tube 1, thereby changing the position of the interstitial water sampling port 6, thereby achieving a change in the detection depth.

[0079] In addition to being able to manually control the position of the interstitial water sampling port 6, the control panel 31 also allows the operator to set the rotation angle and rotation cycle of the drive motor 10. Through preset parameters, the system can automatically perform sampling and analysis at different depths, and realize automatic detection of the full depth of the sampling area, which not only reduces the tediousness of manual operation, but also improves work efficiency, and can ensure accurate sampling and analysis at each preset depth, avoiding errors caused by improper manual operation.

[0080] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0081] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A sediment interstitial water detection device, characterized in that: include: The inner tube (1) is a solid water-permeable core tube, and an inner tube water seepage seam (2) is provided obliquely from the top to the bottom of the outer circumference of the inner tube (1); An outer tube (3) is provided with an opening at one end and is sleeved on the outside of the inner tube (1); the top of the inner tube (1) is located below the top of the outer tube (3); the bottom of the outer tube (3) is detachably connected to a conical drill bit (4); an outer tube seepage slit (5) is vertically provided from the top to the bottom of the outer tube (3) shell; the outer tube seepage slit (5) is arranged opposite to the inner tube seepage slit (2); the intersection of the inner tube seepage slit (2) and the outer tube seepage slit (5) is a gap water sampling port (6); A water-permeable membrane (7) is arranged between the inner tube (1) and the outer tube (3); A driving assembly, arranged at the top of the cavity of the outer tube (3), and used for driving the inner tube (1) to rotate relative to the outer tube (3), so as to adjust the depth of the interstitial water sampling port (6); A detection component, which is connected to a water outlet (9) provided at the top of the outer tube (3) via a negative pressure tube (8) and is used to suck interstitial water flowing through the top of the inner tube (1) for detection; The drive assembly comprises: A fixing member, fixedly arranged on the outer peripheral surface of the outer tube (3), capable of keeping the outer tube (3) and the sediment fixed; A driving motor (10) is fixedly mounted at the top edge of the cavity of the outer tube (3), and a driving gear (11) is arranged on the output shaft of the driving motor (10); An inner gear ring (12) is fixedly mounted on the top of the inner tube (1), and an inner wall of the inner gear ring (12) is provided with a gear ring (13) that cooperates with the driving gear (11).

2. A sediment interstitial water detection device according to claim 1, characterized in that: The fixing member comprises: an annular plate (14) fixedly arranged on the outer peripheral surface of the outer tube (3), the annular plate (14) and the inner tube (1) being located at the same height; A plurality of fixing anchors (15) are evenly arranged on the lower end surface of the annular plate (14).

3. A sediment interstitial water detection device according to claim 2, characterized in that: Half of the inner wall of the inner gear ring (12) is provided as the gear ring (13), and the other half is provided as an arc block (16); the inner tube water seepage slit (2) is provided on the outer peripheral surface of the inner tube (1) located on one side of the arc block (16); and a line connecting the head end and the tail end of the inner tube water seepage slit (2) on a vertical projection plane coincides with a line connecting the head end and the tail end of the arc block (16) on a vertical projection plane, so as to limit the rotation range of the inner tube (1) to 0-180 degrees, so as to achieve that the inner tube water seepage slit (2) and the outer tube water seepage slit (5) always have an intersection.

4. A sediment interstitial water detection device according to any one of claims 1 to 3, characterized in that: The detection component comprises: A box body (17) is provided with a first cavity (18) and a second cavity (19) therein; a transmission hole (20) is provided between the first cavity (18) and the second cavity (19); the box body (17) is provided with a water inlet (21) in communication with the first cavity (18) and located below the transmission hole (20); the box body (17) is provided with a water outlet (22) in communication with the second cavity (19); one end of the negative pressure pipe (8) is detachably connected to the water outlet (9), and the other end is detachably connected to the water inlet (21); A sensor unit, arranged in the first cavity (18), and used for detecting interstitial water in the first cavity (18); a peristaltic pump (23) disposed in the second cavity (19); an input end of the peristaltic pump (23) is connected to the transmission hole (20), and an output end of the peristaltic pump (23) is connected to the drain port (22); the peristaltic pump (23) is used to generate a vacuum negative pressure; A battery pack (24) is electrically connected to the drive motor (10), the sensor unit, and the peristaltic pump (23).

5. A sediment interstitial water detection device according to claim 4, characterized in that: The sensor unit includes a temperature electrode (25), a pH electrode (26), a DO electrode (27), a salinity electrode (28) and an Eh electrode (29).

6. A sediment interstitial water detection device according to claim 4, characterized in that: The top of the box body (17) is provided with a cleaning hole connected to the first cavity (18), and a sealing cover (30) for sealing the cleaning hole.

7. A sediment interstitial water detection device according to claim 4, characterized in that: The water outlet (9) and the water inlet (21) are both provided with internal threads, and both ends of the negative pressure pipe (8) are provided with external threads matching the internal threads.

8. A sediment interstitial water detection device according to claim 5, characterized in that: It also includes a control panel (31) and a display screen (32), wherein the display screen (32) establishes a signal connection with the control panel (31), and the control panel (31) correspondingly establishes a signal connection with the drive motor (10), the peristaltic pump (23), the temperature electrode (25), the pH electrode (26), the DO electrode (27), the salinity electrode (28), and the Eh electrode (29).

9. A sediment interstitial water detection device according to any one of claims 1 to 3, characterized in that: An anti-blocking plow (33) is provided on the outer pipe (3), and the anti-blocking plow (33) is located at the bottom of the water seepage seam (5) of the outer pipe.

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