Two-phase sampling device suitable for rivers, lakes and reservoirs

Abstract

The utility model relates to a two-phase sampling device suitable for rivers, lakes and reservoirs, and belongs to the technical field of sampling devices. The top end of the connecting rod is connected with the handle; the water body sampling device is used for sampling water bodies; the monitoring module is used for monitoring water quality of the water bodies; the bottom mud sampling device is connected to the bottom end of the connecting rod and is used for collecting a bottom mud sample. The device is provided with the water sampling device and the bottom mud sampling device at the same time, so that bottom mud samples can be collected while water samples are collected, and various kinds of sampling can be completed at a time. The specific structure of the water body sampling device is designed, automatic water sample collection can be achieved, an operator only needs to manually complete bottom mud sampling, the bottom mud sample and the water sample are collected, and operation is easy.

Description

Technical Field

[0001] This utility model belongs to the field of sampling devices, specifically relating to a two-phase sampling device suitable for rivers, lakes and reservoirs. Background Technology

[0002] Within the scope of environmental monitoring, water quality monitoring and sediment monitoring of rivers, lakes, and reservoirs constitute the core technical means for assessing the health status of water bodies. Water quality monitoring can accurately analyze the pollution level of rivers, lakes, and reservoirs; sediment monitoring, through quantitative analysis of pollutants such as heavy metals in sediments, can effectively trace the long-term accumulation process of water pollution, thereby achieving precise source tracing of potential pollution sources.

[0003] In terms of sampling procedures, water quality sampling and sediment sampling are typically performed using separate sampling equipment. Taking the widely used water sampler and sediment sampler as examples, these are functionally independent sampling devices. Even if they could be easily integrated to improve portability, in actual sampling operations, each type of sampling device still needs to perform sampling operations independently, making it impossible to achieve simultaneous sampling of water and sediment. Currently, there is an urgent need to develop an integrated sampling device capable of completing both water and sediment sampling in one operation, in order to avoid repetitive procedures and improve sampling efficiency. Summary of the Invention

[0004] To address the aforementioned problems, this utility model proposes a two-phase sampling device suitable for rivers, lakes, and reservoirs.

[0005] To achieve the above objectives, the present invention proposes the following technical content:

[0006] A two-phase sampling device suitable for rivers, lakes, and reservoirs includes:

[0007] handle;

[0008] A connecting rod, the top of which is connected to a handle; equipped with a water sampling device for sampling water and a monitoring module for monitoring water quality;

[0009] A sediment sampling device, connected to the bottom of a connecting rod, is used to collect sediment samples.

[0010] This device has both a water sampling device and a sediment sampling device, which can perform two types of sampling at the same time, saving operation steps and improving sampling efficiency.

[0011] Furthermore, the water sampling device includes the following structure:

[0012] The sampling container is mounted on the connecting rod.

[0013] The tongue edge is fixed to the inner wall of the sampling container cavity, and a through hole is opened in the middle;

[0014] The movable tongue plate is movably connected to the inner wall of the sampling container cavity, located below the tongue edge. The movable tongue plate can rotate to hold the lower surface of the tongue edge and block the through hole in the middle of the tongue edge.

[0015] The rope loop is fixed to the outer wall of the sampling container;

[0016] One end of the pull rope is glued to the upper surface of the movable tongue plate with waterproof adhesive, and the middle section of the pull rope is threaded with a filter screen and a rope loop.

[0017] The spring assembly is mounted on the outer wall of the sampling container; the other end of the pull rope is wound around the spring shaft;

[0018] The movable stop is hinged at its bottom to a movable hole opened on the side wall of the sampling container;

[0019] The magnet is attached to the mainspring shaft with waterproof adhesive and rotates with the mainspring shaft, attracting the movable stop.

[0020] The anti-fall plate is fixedly attached to the edge of the movable stop block;

[0021] A sealing film, adhered to the outer wall of the sampling container, is elastic and used to seal the movable orifice.

[0022] The water sampling device is ingeniously designed. Relying on the rotation of a spring-loaded assembly, along with a pull rope and a movable tongue, it enables the opening and closing of the sampling container, achieving automated sampling. Furthermore, the designed anti-fall plate and sealing membrane ensure that the movable baffle remains in the movable hole position at all times, guaranteeing its effectiveness throughout the sampling process and preventing it from falling into the sampling container cavity.

[0023] Furthermore, the monitoring module includes the following structure:

[0024] The monitoring housing is mounted on the connecting rod.

[0025] The monitoring module, placed inside the monitoring housing, is used to monitor water data.

[0026] Water-permeable holes, located on the side wall of the monitoring housing, are present in several sizes and are used to allow external water to enter the contact area.

[0027] When collecting water samples using a sampling container, the device can read water quality data using a monitoring module, store the data using its built-in storage module, and later retrieve the stored water quality data via a computer to provide more experimental data.

[0028] Furthermore, the sediment sampling device includes the following structure:

[0029] The sediment puncture sampling needle is formed by cutting a hollow cylinder, with a pointed end at the bottom.

[0030] The outer plate is fixed to the outer wall of the bottom sediment puncture sampling needle. The inner wall of the outer plate does not contact the outer wall of the bottom sediment puncture sampling needle, and a receiving cavity is formed between the two.

[0031] The spring is located in the receiving cavity;

[0032] A strip-shaped sliding hole is formed on the outer plate, including a horizontally arranged horizontal section and a vertically arranged vertical section;

[0033] The slider is located in the receiving cavity, at the lower end of the spring;

[0034] The leak-proof sheet is fixed to the lower end of the slider and is elastic;

[0035] A limiting plate is fixed to the lower end of the outer plate, and a mud inlet hole is opened on the surface of the limiting plate; the limiting plate covers the bottom opening of the bottom mud puncture sampling needle.

[0036] A cleverly designed anti-leakage plate is used to promptly seal the opening of the sediment puncture sampling needle after sediment sampling is completed, reducing the amount of sediment leakage during the extraction of the sediment puncture sampling needle from the water body and minimizing sediment loss.

[0037] Furthermore, the connecting rod includes:

[0038] Several connection segments can be connected sequentially;

[0039] The threaded head is fixed to the upper end of the connecting section;

[0040] A threaded hole is provided at the lower end of the connecting section; when two adjacent connecting sections are connected, the threaded end of one connecting section is screwed into the threaded hole of the other connecting section.

[0041] It can reasonably control the number of connecting sections based on water depth, thereby enabling the collection of bottom sediment at a certain depth within a certain range, and adapting to a wider range of water depths.

[0042] Furthermore, a filter screen is installed at the upper opening of the sampling container.

[0043] This can reduce the amount of debris, such as aquatic plants, entering the sampling container.

[0044] Furthermore, an assembly groove is provided on the connecting section; an assembly rod is fixedly connected to the sampling container or monitoring shell, and after the assembly rod is inserted into the assembly groove, the elastic buckle on the assembly rod is connected to the slot in the assembly groove.

[0045] This sampling structure enables the rapid installation and disassembly of the sampling container and monitoring housing by human intervention.

[0046] By adopting the above technical solution, the beneficial effects that this utility model can achieve are:

[0047] 1. It is equipped with both water sampling device and sediment sampling device, which can collect water samples and sediment samples at the same time, and complete multiple sampling at one time.

[0048] 2. The specific structure of the water sampling device was designed, which can realize the automated collection of water samples. The operator only needs to manually complete the bottom sediment sampling. At this point, both bottom sediment samples and water samples are collected, and the operation is simple. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0050] Figure 2 This is a schematic diagram of the water sampling device;

[0051] Figure 3 This is a schematic diagram of the structure of the movable stop and the sealing membrane;

[0052] Figure 4 This is a diagram showing the state of the water sampling device when the spring assembly is rotated to 0 degrees.

[0053] Figure 5 This is a diagram showing the state of the water sampling device when the spring assembly rotates to 90 degrees.

[0054] Figure 6 This is a diagram showing the state of the water sampling device when the spring assembly rotates to 180 degrees.

[0055] Figure 7 This is a schematic diagram showing the positional relationship between the movable tongue plate and the tongue edge;

[0056] Figure 8 This is a schematic diagram of the monitoring module;

[0057] Figure 9 This is a schematic diagram of the structure of the strip-shaped sliding hole when viewed radially;

[0058] Figure 10 This is a schematic diagram of the structure of a sediment puncture sampling needle;

[0059] Figure 11 This is a schematic diagram of the structure of Example 2.

[0060] 1. Handle; 2. Connecting rod; 21. Connecting section; 22. Threaded head; 23. Threaded hole; 3. Sediment sampling device; 31. Sediment piercing sampling needle; 32. Outer plate; 33. Receiving cavity; 34. Spring; 35. Strip-shaped sliding hole; 36. Sliding block; 37. Guide rod; 38. Leak-proof plate; 39. Limiting plate; 310. Sediment inlet hole; 4. Water sampling device; 41. Assembly groove; 42. Sampling container; 43. Assembly rod; 44. Tongue edge; 45. Movable tongue plate; 46. Filter screen; 47. Rope ring; 48. Pull rope; 49. Spring assembly; 410. Movable stop block; 411. Magnet; 412. Indicator; 413. Fall arrestor; 414. Sealing membrane; 415. Sampling tube; 416. Valve; 5. Monitoring module; 51. Monitoring housing; 52. Water permeable hole; 53. Top cover; 6. Hole ring; 7. Sediment collection container; 8. Counterweight claw; 9. Connecting ring; 10. Pull rope. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0062] Example 1: See Figure 1 A two-phase sampling device suitable for rivers, lakes, and reservoirs is described in this embodiment. The various components of the device are assembled, enabling in-situ sampling. It is primarily applicable to shallow rivers and lakes with a water depth of 0.5-1m.

[0063] In this embodiment, the device includes the following structure:

[0064] Handle 1 is for sampling personnel to hold with both hands to operate the device;

[0065] The connecting rod 2, whose top end is connected to the handle 1, is equipped with a water sampling device 4 for sampling water and a monitoring module 5 for monitoring water quality.

[0066] The sediment sampling device 3 is connected to the bottom end of the connecting rod 2 and is used to collect sediment samples.

[0067] See Figure 2 Connecting rod 2 includes:

[0068] Several connecting segments 21 are all cylindrical; several connecting segments 21 can be connected sequentially.

[0069] The threaded head 22 is fixed to the upper end of the connecting section 21;

[0070] A threaded hole 23 is provided at the lower end of the connecting segment 21. When two adjacent connecting segments 21 are connected, the threaded head 22 of one connecting segment 21 is screwed into the threaded hole 23 of the other connecting segment 21. In this way, multiple connecting segments 21 form a connecting rod 2 as a whole. The threaded head 22 at the top of the connecting rod 2 is screwed into the threaded hole 23 at the bottom of the handle 1, thereby connecting the handle 1 and the connecting rod 2 as a whole.

[0071] See Figure 2 The water sampling device 4 includes:

[0072] At least one mounting slot 41 is provided on the side of each connecting segment 21;

[0073] Sampling container 42 (see Figure 2 The sample container 42 is cylindrical in shape with its opening at the top. It is fixed to the side with an assembly rod 43 corresponding to the assembly slot. The two are connected one-to-one. The sample container 42 is connected to a connection section 21 by the assembly rod 43 and the assembly slot.

[0074] The assembly rod 43 is connected to the assembly slot 41 as follows: the assembly rod 43 can be inserted into the corresponding assembly slot 41, and an elastic buckle is installed on the side of the assembly rod 43. A corresponding slot is provided on the inner wall of the assembly slot 41 for engaging with the elastic buckle. Relying on the connection between the elastic buckle and the slot, the sampling container 42 and the connecting section 21 can be detachably connected as a whole. By applying external force to deform the elastic buckle, the disassembly and installation of the two can be achieved.

[0075] Tongue edge 44 (see Figure 7 It is fixed to the inner wall of the cavity of the sampling container 42, and is approximately ring-shaped with a through hole in the middle to allow water to enter the sampling container 42 from the upper opening.

[0076] A movable tongue plate 45 is hinged to the inner wall of the sampling container 42 cavity, located below the tongue edge 44. The movable tongue plate 45 can rotate to abut against the lower surface of the tongue edge 44, thereby blocking the through hole in the middle of the tongue edge 44 and creating a closed space within the sampling container 42 cavity. To enhance the sealing between the movable tongue plate 45 and the lower surface of the tongue edge 44, the lower surface of the tongue edge 44 is designed to fit the shape of the movable tongue plate 45, ensuring a complete fit. Furthermore, the movable tongue plate 45 is made of silicone material to further improve the sealing effect.

[0077] The filter screen 46 is installed on the top of the outside of the sampling container 42 to prevent debris (such as aquatic plants) from entering the sampling container 42.

[0078] Rope loop 47 (see) Figure 2 It is fixed to the outer wall of the sampling container 42.

[0079] One end of the pull rope 48 is bonded and fixed to the upper surface of the movable tongue plate 45 with waterproof glue, and the middle section of the pull rope 48 is threaded through the filter screen 46 and the rope loop 47.

[0080] The spring assembly 49 is a mature product that can be directly purchased and installed on the outer wall of the sampling container 42. For example, after purchasing a "musical spring" product, the sound-generating part can be removed, but the spring structure can be retained. Because it also has an escapement mechanism installed inside, it stores elastic potential energy after the spring is tightened, and when releasing energy, the escapement mechanism can slowly release the energy. The spring shaft is rotated by the user to tighten the spring. The other end of the pull cord 48 is wound around the spring shaft and is glued to the spring shaft with waterproof adhesive to prevent it from coming off. When the spring is not tightened, the pull cord 48 is in a taut state; after the spring is tightened, the pull cord 48 wound on its spring shaft is unwound, so that the pull cord 48 is in a slack state.

[0081] The movable stop 410 is hinged at its bottom end to a movable hole in the side wall of the sampling container 42. When the movable tongue 45 abuts against the lower surface of the tongue edge 44, it restricts the free fall of the movable tongue 45 to open the sampling container 42. The side of the movable stop 410 facing the cavity of the sampling container 42 is inclined, which does not prevent the movable tongue 45 from abutting against the tongue edge 44 upwards.

[0082] Magnet 411 is attached to the mainspring shaft with waterproof adhesive and rotates with the mainspring shaft. The aforementioned movable stop 410 is made of iron. As the magnet 411 rotates with the mainspring shaft, it generates a magnetic attraction force on the movable stop 410, causing the movable stop 410 to rotate. This releases the movable tongue 45, allowing it to fall naturally from its state of being held by the movable stop 410 under its own weight.

[0083] See Figure 4 , Figure 5 and Figure 6 An indicator 412 is installed on the mainspring shaft. The aforementioned magnet 411 and the indicator 412 are located on opposite sides of the mainspring shaft. When viewed parallel to the axis of the mainspring shaft, a coordinate system is established with the mainspring shaft as the origin. When the indicator 412 is at 180 degrees (i.e., when the magnet 411 is at 0 degrees), the mainspring shaft is in its maximum tension state. Figure 4 In this state, the pull cord is slack; when indicator 412 is at 0 degrees (i.e., when magnet 411 is at 180 degrees), the mainspring shaft is in its natural state. Figure 6In this state, the pull cord is taut; during the release of the elastic potential energy of the mainspring assembly 49, the indicator 412 rotates from 180 degrees to 0 degrees as the mainspring shaft rotates (i.e., the magnet 411 rotates from 0 degrees to 180 degrees). The aforementioned movable stop 410 is located above the mainspring shaft. Based on this, when the magnet 411 rotates to 90 degrees, the magnetic attraction force generated by the magnet 411 on the movable stop 410 causes the movable stop plate to rotate, realizing the process of allowing the movable tongue plate 45 to fall naturally.

[0084] Fall arrestor plate 413 (see) Figure 3 The stop plate 413 is fixed to the edge of the movable stop 410, forming a whole. The edge length of the stop plate 413 is greater than the diameter of the movable hole, thus preventing the movable stop 410 from falling into the cavity of the sampling container 42. Since the movable stop 410 needs sufficient space to rotate, it cannot be tightly sealed with the movable hole. To prevent leakage from the movable hole, an elastic sealing membrane 414 is glued to the outer wall of the sampling container 42 with waterproof adhesive. This tightly blocks the flow of water from the cavity of the sampling container 42 to the outside through the movable hole. Simultaneously, the elastic sealing membrane 414 allows the movable stop 410 to remain in place by its elastic restoring force when not attracted by magnetic force. Figure 3 The state shown in the left-hand view provides a sealing effect. When the movable stop 410 is attracted by magnetic force, the sealing film 414, through its elastic deformation, provides the movable stop 410 with a certain amount of rotation space.

[0085] 415 sample tube (see Figure 2 The sampling tube 415 is installed at the bottom of the sampling container 42 and communicates with the cavity of the sampling container 42. A valve 416 is installed at the lower end of the sampling tube 415 for manual opening to discharge the sampled water in the sampling container 42.

[0086] See Figure 8 The water quality monitoring module 5 includes the following structure:

[0087] The monitoring housing 51 is cylindrical. A top cover 53 is threadedly connected to the top opening. The monitoring module 5 is placed in the internal cavity of the monitoring housing 51. The top cover 53 is used to cover the opening of the monitoring housing to prevent the monitoring module 5 from falling out of the cavity of the monitoring housing 51.

[0088] Monitoring module 5 consists of water quality sensors, including pH and ammonia nitrogen sensors, and has a built-in storage module. The water data collected by these sensors is stored in the storage module. This monitoring module 5 provides relevant water data simultaneously with the sampling personnel when collecting water and sediment samples, facilitating the subsequent establishment of related experimental parameters. After sampling is completed, relevant personnel will connect the waterproof connector on the storage module to the data cable plug on the computer to read the water data stored in the storage module.

[0089] Several water-permeable holes 52 are provided on the side of the monitoring housing 51 to allow water from outside the monitoring housing 51 to enter its cavity and come into contact with the water quality sensor. The water quality sensor then reads and stores the water data.

[0090] The monitoring housing 51 is installed on the connecting section 21 below the sampling container 42 in the same manner as the aforementioned sampling container 42. This arrangement allows the water quality monitoring module 5 to allow water to enter and monitor water quality data when the sampling container 42 is collecting water samples. In subsequent data processing, the water sample collected by the sampling container 42 can be used for experiments, and the water quality data collected by the water quality monitoring module 5 can be used to obtain information such as the pH and ammonia nitrogen content of the water, achieving simultaneous acquisition of multiple data points from a single sampling.

[0091] See Figure 9 and Figure 10 The sediment sampling device 3 includes the following structure:

[0092] The bottom sediment puncture sampling needle 31 is formed by cutting a hollow cylinder. Its bottom end is a pointed tip, and the aforementioned threaded head 22 is installed at the top end for connecting with the threaded hole 23 at the bottom end of the corresponding connecting section 21.

[0093] The outer plate 32 is fixed to the outer wall of the bottom sediment puncture sampling needle 31. The inner wall of the outer plate does not contact the outer wall of the bottom sediment puncture sampling needle 31. Based on this, a receiving cavity 33 is formed between the two.

[0094] Spring 34 is located in receiving cavity 33.

[0095] Strip-shaped sliding hole 35 (see) Figure 9 The sampling needle 31 is located on the outer plate 32 and includes a horizontally set horizontal section and a vertically set vertical section. When viewed radially along the bottom mud puncture sampling needle 31, its overall shape resembles the number "7".

[0096] The slider 36 is located within the receiving cavity 33, at the lower end of the spring 34. The spring 34 is always under compression and has elastic restoring force. The spring 34 contacts the upper surface of the slider 36 and applies a downward force to the slider 36. A guide rod 37 is fixedly connected to the surface of the slider 36. The guide rod 37 is located within the aforementioned strip-shaped sliding hole 35 and can move along the strip-shaped sliding hole 35, which includes movement along a horizontal section and a vertical section. When the guide rod 37 slides along the horizontal section of the strip-shaped sliding hole 35, with the sediment puncture sampling needle 31 as the reference frame, the guide rod 37 and the slider 36 rotate as a whole around the axis of the sediment puncture sampling needle 31. When the guide rod 37 slides along the vertical section of the strip-shaped sliding hole 35, with the sediment puncture sampling needle 31 as the reference frame, the guide rod 37 and the slider 36 move as a whole downward in a direction parallel to the axis of the sediment puncture sampling needle 31.

[0097] Leak-proof sheet 38 is fixed to the lower end of slider 36. It is a metal elastic sheet that can undergo elastic deformation.

[0098] The limiting plate 39 is fixed to the lower end of the outer plate 32. The surface of the limiting plate 39 is parallel to the bottom slope of the bottom of the sediment puncture sampling needle 31. The limiting plate 39 does not contact the bottom surface of the bottom of the sediment puncture sampling needle 31. The limiting plate covers the bottom opening of the sediment puncture sampling needle 31. Based on this, a retention cavity is left between the two. The surface of the limiting plate 39 has a mud inlet hole 310. The lateral width of the anti-leakage plate 38 is greater than the maximum width of the mud inlet hole 310 in the same direction. Based on this, during the release of the elastic force of the aforementioned spring 34, the anti-leakage plate 38 and the slider 36 move downward as a whole. The anti-leakage plate 38 enters the retention chamber from the receiving cavity 33. Since the lower end of the anti-leakage plate 38 cannot pass through the mud inlet hole 310, but will contact the upper surface of the limiting plate 39, under the restoring force of the spring 34, the anti-leakage plate 38 will abut against the surface of the limiting plate 39 and deform, thereby correspondingly blocking the mud inlet hole 310, and preventing the bottom mud sampled by the bottom mud piercing sampling needle 31 from leaking out as much as possible. When the slider 36 compresses the spring and returns to the horizontal section of the strip-shaped sliding hole 35, it relies on manual operation. During this process, the anti-leakage plate 38 gradually enters the receiving cavity 33 from the retention chamber, and the shape of the anti-leakage plate 38 will be restored, waiting for the next operation.

[0099] The sampling process of this sampling device is as follows:

[0100] I. Assemble the sampling device.

[0101] Based on the actual water depth of the river and lake, the sampling personnel assemble an appropriate number of connecting sections 21 into a whole, and attach the handle and bottom sediment sampling device to the upper and lower ends of the whole to ensure that the handle 1 can be held on the water surface. At the same time, the water sampling device 4 and the monitoring module 5 are installed on different connecting sections 21 respectively to ensure that both can be below the water surface during sampling.

[0102] The sampling personnel slid the slider 36 to the horizontal section of the strip-shaped sliding hole 35. Due to the limitation of the horizontal section structure, the guide rod 37 cannot be displaced under the elastic restoring force of the spring 34, so the spring 34 remains in a compressed state and cannot push the slider 36 down temporarily.

[0103] Finally, the sampling personnel pressed down on the movable stop 410 to prevent it from rotating, and rotated the spring assembly to turn the magnet to the 0-degree position. At this time, the movable stop 410 was held against the lower end of the movable tongue 45, so the movable tongue 45 could not fall naturally, and the spring assembly and the movable tongue 45 remained in contact. Figure 4 state.

[0104] II. Sampling of bottom sediment.

[0105] The sampling personnel vertically insert the bottom sediment puncture sampling needle 31 of the sampling device into the bottom sediment of the river and lake. After being squeezed, the bottom sediment will enter the bottom sediment puncture sampling needle 31 from the sediment inlet hole through the retention chamber.

[0106] Then, the sampling personnel need to trigger the elastic recovery of spring 34, allowing the leak-proof plate 38 to move down and block the mud inlet hole, ensuring that the sampled bottom sediment will not leak out again from the mud inlet hole when the sampling device is removed from the water body. The specific operation is as follows: the sampling personnel rotate the sampling device horizontally; the direction of horizontal rotation is specifically required. Figure 9 See, it needs to be turned from right to left. After the bottom sediment piercing sampling needle 31 is inserted into the bottom sediment, rotating the sampling device from right to left will cause the bottom sediment to obstruct the piercing sampling needle 31 and the guide rod 37 connected to it. Based on the principle that forces are reciprocal, a reaction force is generated from left to right. Under this force, the guide rod 37, the slider 36, and the anti-leakage plate 38 as a whole will move slightly to the right, causing the guide rod 37 to leave the horizontal section of the strip-shaped sliding hole 35 and enter the vertical section. When the guide rod 37 is in the vertical section, the guide rod 37 has space to move downward. At this time, the elastic force of the spring 34 is released, and the spring 34 forces the slider 36 to move downward. Finally, the slider 36 slides to the bottom of the strip-shaped sliding hole 35. During this process, the anti-leakage plate 38 enters the retention cavity and deforms under the elastic force of the spring 34, thereby blocking the mud inlet hole 310 and ensuring that the mud inlet hole 310 no longer leaks mud as much as possible.

[0107] III. Water sampling process.

[0108] When the aforementioned sediment piercing sampling needle 31 is inserted into the sediment, the water sampling device 4 is completely submerged below the water surface. Initially, because the device is in... Figure 4 In the initial state, the movable tongue 45 is restricted by the movable stop 410 and cannot open. As time progresses, the spring assembly gradually rotates and winds up the pull rope 48. When the spring assembly rotates the magnet to approximately 90 degrees (state shown in Figure 5), the attraction of the magnet to the movable stop 410 overcomes the resistance of the sealing membrane, causing the movable stop 410 to rotate a larger angle and disengage from the movable tongue 45. At this point, the movable tongue 45 falls due to its own weight, opening the sampling container 42 and allowing water to enter. As the spring assembly continues to rotate, when the magnet exceeds 90 degrees, the attraction of the magnet to the movable stop 410 becomes less than the elastic force of the sealing membrane, and the sealing membrane regains its elasticity. However, the movable tongue 45 is already open at this point. The process continues until the spring assembly rotates the magnet to 180 degrees, at which point the pull rope tightens, pulling up the movable tongue 45 and resealing the sampling container 42.

[0109] As time passes, the spring assembly rotates the magnet 180 degrees, the pull rope 48 changes from slack to taut, and the movable tongue 45 is pulled up again, resealing the opening of the sampling container 42. Since the inner end of the movable stop 410 is beveled, it does not affect the movement of the movable tongue 45. At this point, water sampling is completed, and the spring assembly and pull rope are in position. Figure 6 state.

[0110] Sampling personnel need to strictly control the time, as the time it takes for the spring assembly to rotate the magnet from 0 degrees to 180 degrees is known and fixed, and is set as t1. After rotating the spring assembly as required above, the sampling device should be immediately placed in the water for sampling, and the timing electronic device should be started simultaneously. The sampling personnel must ensure that the water sampling device 4 is in the water for a time greater than t1, and that the sampling device can only be removed from the water surface when the spring assembly has rotated the magnet to 180 degrees, ensuring that there is sufficient time in the sampling container 42 to complete the above sampling.

[0111] During water sampling, the water enters the monitoring casing 51, where the water quality sensor reads the water quality data.

[0112] Example 2: The difference from Example 1 is that in this example, the various parts of the device are no longer threaded together, and the original handle 1 and bottom sediment sampling device are discarded. The various parts are tied together by a towing rope for water sampling in reservoirs, which is suitable for water areas of 2-5m.

[0113] In this embodiment, at least one perforated ring 6 is fixedly connected to each connecting segment. When the aforementioned pulling rope 10 passes through the perforated ring 6, it is tied together with each perforated ring 6. The bottom end of the pulling rope is tied to another bottom sediment sampling device.

[0114] The sediment sampling device in this embodiment includes the following structure:

[0115] The sediment collection container 7 is cylindrical with an open top;

[0116] Multiple counterweight claws 8 are fixed to the top of the sediment collection container 7, and their counterweights ensure that the container is inserted into the sediment.

[0117] The connecting ring 9 includes a rod segment and a ring-shaped segment. The rod segment is fixed to the counterweight claw 8 by a bracket, and the ring segment is located at the top of the rod segment. The bottom end of the towing rope is attached to the ring segment of the connecting ring 9.

[0118] The sediment sampling device in this device differs from that in Example 1, but the sampling method of the water sampling and monitoring module is the same as that in Example 1.

[0119] The specific sampling process of the sediment sampling device is as follows:

[0120] Tie the towing rope 10 to the boat and pull the device. Because the counterweight 8 is heavy, it will insert into the bottom sediment. As the boat moves, it drags the sediment sampling device, and the sediment will enter the device from the opening at the top. After the boat has dragged the sediment sampling device a certain distance in the sediment, the sediment collection container 7 can be lifted out of the water using the towing rope 10 to obtain the sampled sediment.

[0121] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A two-phase sampling device suitable for rivers, lakes, and reservoirs, characterized in that, include: handle; A connecting rod, the top of which is connected to a handle; equipped with a water sampling device for sampling water and a monitoring module for monitoring water quality; A sediment sampling device, connected to the bottom of a connecting rod, is used to collect sediment samples.

2. A two-phase sampling device suitable for rivers, lakes, and reservoirs according to claim 1, characterized in that, The water sampling device includes the following structure: The sampling container is mounted on the connecting rod. The tongue edge is fixed to the inner wall of the sampling container cavity, and a through hole is opened in the middle; The movable tongue plate is movably connected to the inner wall of the sampling container cavity, located below the tongue edge. The movable tongue plate can rotate to hold the lower surface of the tongue edge and block the through hole in the middle of the tongue edge. The rope loop is fixed to the outer wall of the sampling container; One end of the pull rope is glued to the upper surface of the movable tongue plate with waterproof adhesive, and the middle section of the pull rope is threaded with a filter screen and a rope loop. The spring assembly is mounted on the outer wall of the sampling container; the other end of the pull rope is wound around the spring shaft; The movable stop is hinged at its bottom to a movable hole opened on the side wall of the sampling container; The magnet is attached to the mainspring shaft with waterproof adhesive and rotates with the mainspring shaft, attracting the movable stop. The anti-fall plate is fixedly attached to the edge of the movable stop block; A sealing film, adhered to the outer wall of the sampling container, is elastic and used to seal the movable orifice.

3. A two-phase sampling device suitable for rivers, lakes, and reservoirs according to claim 2, characterized in that, The monitoring module includes the following structure: The monitoring housing is mounted on the connecting rod. The monitoring module, placed inside the monitoring housing, is used to monitor water data. Water-permeable holes, located on the side wall of the monitoring housing, are present in several sizes and are used to allow external water to enter the contact area.

4. A two-phase sampling device suitable for rivers, lakes, and reservoirs according to claim 1, characterized in that, The sediment sampling device includes the following structure: The sediment puncture sampling needle is formed by cutting a hollow cylinder, with a pointed end at the bottom. The outer plate is fixed to the outer wall of the bottom sediment puncture sampling needle. The inner wall of the outer plate does not contact the outer wall of the bottom sediment puncture sampling needle, and a receiving cavity is formed between the two. The spring is located in the receiving cavity; A strip-shaped sliding hole is formed on the outer plate, including a horizontally arranged horizontal section and a vertically arranged vertical section; The slider is located in the receiving cavity, at the lower end of the spring; The leak-proof sheet is fixed to the lower end of the slider and is elastic; A limiting plate is fixed to the lower end of the outer plate, and a mud inlet hole is opened on the surface of the limiting plate; the limiting plate covers the bottom opening of the bottom mud puncture sampling needle.

5. A two-phase sampling device suitable for rivers, lakes, and reservoirs according to claim 1, characterized in that, The connecting rod includes: Several connection segments can be connected sequentially; The threaded head is fixed to the upper end of the connecting section; A threaded hole is provided at the lower end of the connecting section; when two adjacent connecting sections are connected, the threaded end of one connecting section is screwed into the threaded hole of the other connecting section.

6. A two-phase sampling device suitable for rivers, lakes, and reservoirs according to claim 2, characterized in that, A filter screen is installed at the top opening of the sampling container.

7. A two-phase sampling device suitable for rivers, lakes, and reservoirs according to claim 5, characterized in that, An assembly groove is provided on the connecting section; an assembly rod is fixedly connected to the sampling container or monitoring shell. After the assembly rod is inserted into the assembly groove, the elastic buckle on the assembly rod is connected to the slot in the assembly groove.

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