A sampling device for water quality monitoring

Abstract

The present invention provides a sampling device for water quality monitoring, which relates to the technical field of monitoring sampling. The device comprises a control tube coaxially arranged with an intermediate tube, a control groove being provided in the control tube, two groups of coaxially arranged tail sections and head sections being installed in the control groove, each group of the head sections and the tail sections being spaced apart, a piston disc being slidably installed in the control groove, a synchronization rod being coaxially installed on the piston disc, two through grooves being provided on the piston disc, and the through grooves and the head section being coaxially arranged. The device realizes the function of synchronous sampling at multiple depths, and each layer is equipped with an independent control mechanism through a multi-layer arrangement of pipelines, so that the device can simultaneously perform sampling at different water depths. This design improves the sampling efficiency and avoids the problem that traditional equipment needs to be lowered multiple times to complete sampling at different depths.

Description

Technical Field

[0001] The present invention relates to the technical field of monitoring and sampling, and more particularly to a sampling device for water quality monitoring. Background Art

[0002] In the current field of water quality monitoring and environmental research, water sampling is a crucial link. However, existing water sampling techniques and equipment have some limitations, which seriously affect the accuracy and representativeness of sampling. Most existing equipment can only sample at a single water depth. This single-depth sampling method cannot fully reflect the water quality status of water bodies at different depths, because the physical, chemical and biological properties of water bodies often vary with depth. For example, parameters such as temperature, dissolved oxygen, and nutrient concentrations may vary significantly in different water layers. Therefore, it is difficult to accurately assess the ecological status and pollution level of the entire water body by relying solely on samples from a single depth, which may lead to deviations in research results and errors in environmental management decisions.

[0003] In addition, existing sampling equipment also faces severe challenges in sample sealing and preservation. After completing the collection of deep water samples, the equipment often cannot effectively seal the samples during the ascent process. This leads to a problem: when the sampler passes through the upper water body, the upper water may seep into the sample and contaminate the deep water samples that have been collected. This contamination will not only change the chemical composition of the sample, but may also introduce microbial communities at different depths, thereby seriously affecting the accuracy of water quality analysis. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the problems existing in the prior art, the present invention provides a sampling device for water quality monitoring to solve the technical problems mentioned in the background technology.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a sampling device for water quality monitoring, comprising a plurality of intermediate tubes; and also comprising a control mechanism, wherein the control mechanism comprises a control tube coaxially arranged with the intermediate tube, a control groove being provided in the control tube, two groups of coaxially arranged tail sections and head sections being installed in the control groove, each group of the head sections and the tail sections being spaced apart, a piston disc being slidably installed in the control groove, a synchronization rod being coaxially provided on the piston disc, two through grooves being provided on the piston disc, and the through grooves and the head sections being coaxially arranged; a water inlet mechanism, wherein the water inlet mechanism comprises a water inlet groove formed between the control tube and the intermediate tube, transverse grooves being coaxially provided in the control tube and the intermediate tube respectively, a telescopic rod being slidably connected in the transverse groove, a plurality of water inlet holes and annular grooves being provided on the telescopic rod, and the plurality of water inlet holes being connected to the annular groove.

[0008] Preferably, the control mechanism also includes a pull plate installed on the synchronization rod, a tension spring is connected between the pull plate and the intermediate tube, and pull sleeves are installed at equal intervals on the tension spring. A plurality of pull sleeves are slidably connected to the synchronization rod. This design realizes the control of the sampling depth through the cooperation of the pull plate and the tension spring. The tension spring provides an adjustable rebound force, and the pull sleeves installed at equal intervals ensure the uniform distribution of tension. At the same time, the sliding connection method of the pull sleeve on the synchronization rod improves the stability and reliability of the entire mechanism.

[0009] Preferably, each of the pull sleeves is provided with a through hole, and the synchronization rod is provided with multiple threaded holes, and the fixing pin passes through the through hole and is threadedly connected to the threaded hole. This design achieves precise adjustment of the pull sleeve position through the cooperation of the fixing pin and the threaded hole, so that the tension of each sampling layer can be independently adjusted according to the water depth, ensuring adaptability of use.

[0010] Preferably, a limit block is coaxially mounted on the telescopic rod, a limit slot is provided in the control tube, and the limit block is slidably connected in the limit slot. This design ensures that the telescopic rod always remains on a predetermined track during movement through the cooperation of the limit block and the limit slot, preventing deviation or rotation, while also limiting the travel range of the telescopic rod and improving the reliability of the equipment.

[0011] Preferably, a plurality of bidirectional rods are installed at equal intervals between the control tube and the intermediate tube. This design strengthens the connection strength between the control tube and the intermediate tube through the uniform distribution of the plurality of bidirectional rods, ensures the coaxiality between the two, and also improves the rigidity of the entire structure to prevent deformation or shaking during use.

[0012] Preferably, the water inlet mechanism also includes a water storage tank provided in the intermediate tube, the water storage tank is connected to the transverse groove, an exhaust groove connected to the transverse groove and the water storage tank is provided in the intermediate tube, an air outlet groove is provided on the telescopic rod, and the air outlet groove is connected to one of the water inlet holes. This design forms a complete water sample collection and bubble removal system through the cooperation of the water storage tank, the exhaust groove and the air outlet groove, ensuring that bubbles can be discharged in time during the sampling process to avoid bubbles affecting the sampling quality, while also ensuring the convenience of sampling.

[0013] Preferably, a connecting rod is installed at the upper end of the plurality of intermediate tubes, and a connecting sleeve is installed at the lower end of the plurality of intermediate tubes. The plurality of connecting rods and connecting sleeves are detachably connected in sequence, and the exhaust groove is close to one end of the water storage tank and one side of the connecting rod. This design realizes the modular assembly of the equipment through the detachable connection between the connecting rod and the connecting sleeve, which is convenient for adjusting the number of sampling layers according to actual needs. At the same time, the special position design of the exhaust groove ensures that the bubbles can be discharged smoothly, thereby improving the exhaust efficiency.

[0014] Preferably, an expansion tank is threadedly installed on each of the intermediate tubes. This design increases the water storage capacity of each sampling layer through the provision of the expansion tank, ensuring sufficient sample volume for various testing needs. At the same time, the threaded connection method facilitates the installation and disassembly of the expansion tank, facilitates cleaning and maintenance, and improves the practicality of the equipment.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the present invention provides a water quality monitoring sampling device with the following beneficial effects:

[0017] The device realizes the function of multi-depth synchronous sampling. Through multi-layer pipes, each layer is equipped with an independent control mechanism, allowing the equipment to sample at different water depths simultaneously. This design improves sampling efficiency and avoids the problem that traditional equipment needs to be lowered multiple times to complete sampling at different depths. More importantly, synchronous sampling can more accurately reflect the vertical distribution characteristics of the water body at a certain point in time. Secondly, the device realizes automatic adaptation to the pressure at different depths through the design of the spring assembly. The spring coefficient of each layer of sampling device is precisely calculated to correspond to the pressure at the water depth where it is located. This design ensures ideal sampling effects at different water depths, while also avoiding sample contamination caused by excessive water pressure. When sampling is completed, the sample can be automatically sealed through the cooperation of the piston disc and the groove. This design effectively prevents water contamination during the sample extraction process and ensures the purity and representativeness of the sample. In particular, when the water depth exceeds the design range, the equipment will seal to avoid collecting samples that do not meet the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a sampling device for water quality monitoring in the present invention;

[0019] Figure 2 Schematic diagram of the structure of the control tube and the intermediate tube in the present invention;

[0020] Figure 3 Schematic diagram of the cross-sectional structure of the water inlet pipe and the control pipe in the present invention;

[0021] Figure 4 Schematic diagram of the cross-sectional structure of the telescopic rod and the control tube in the present invention;

[0022] Figure 5 Schematic diagram of the cross-sectional structure of the control tube in the present invention;

[0023] Figure 6 Schematic diagram of the cross-sectional structure of the intermediate tube and the telescopic rod in the present invention;

[0024] Figure 7 Schematic diagram of the cross-sectional structure of the intermediate tube in the present invention;

[0025] Figure 8 Schematic diagram of the cross-sectional structure of the telescopic rod in the present invention;

[0026] Figure 9 Schematic diagram of the exploded structure of the synchronization rod and the fixing pin in the present invention;

[0027] Figure 10 It is a structural schematic diagram of the fixing rod and the pull plate in the present invention.

[0028] In the figure: 11, intermediate tube; 21, control tube; 22, control groove; 23, tail section; 24, head section; 25, piston disc; 26, synchronization rod; 27, through groove; 28, pull disc; 29, tension spring; 31, water inlet groove; 32, transverse groove; 33, telescopic rod; 34, water inlet hole; 35, annular groove; 36, water storage groove; 37, exhaust groove; 38, air outlet groove; 39, connecting rod; 210, pull sleeve; 211, through hole; 212, threaded hole; 213, fixing pin; 214, limit block; 215, limit groove; 216, two-way rod; 310, connecting sleeve; 311, expansion tank. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0031] In the present invention, unless otherwise specified, directions such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0032] See also Figures 1 to 10 A sampling device for water quality monitoring includes a plurality of intermediate tubes 11; a control mechanism, the control mechanism includes a control tube 21 arranged coaxially with the intermediate tube 11, a control groove 22 is provided in the control tube 21, two groups of coaxially arranged tail sections 23 and head sections 24 are installed in the control groove 22, and there is a gap between each group of head sections 24 and tail sections 23, a piston disc 25 is slidably installed in the control groove 22, a synchronization rod 26 is coaxially installed on the piston disc 25, two through grooves 27 are provided on the piston disc 25, and the through groove 27 and the head section 24 are coaxially arranged, the control mechanism also includes a piston disc 25 installed on the synchronization rod 26 A pull disc 28 is provided, and a tension spring 29 is connected between the pull disc 28 and the intermediate tube 11. Pull sleeves 210 are installed at equal intervals on the tension spring 29. Multiple pull sleeves 210 are slidably connected to the synchronization rod 26. Each pull sleeve 210 is provided with a through hole 211. The synchronization rod 26 is provided with multiple threaded holes 212. The fixing pin 213 passes through the through hole 211 and is threadedly connected to the threaded hole 212. A limit block 214 is coaxially installed on the telescopic rod 33. A limit groove 215 is provided in the control tube 21. The limit block 214 is slidably connected to the limit groove 215. Multiple bidirectional rods 216 are installed at equal intervals between the control tube 21 and the intermediate tube 11.

[0033] Before sampling the corresponding water area, it is necessary to install the corresponding sampling equipment according to the required sampling depth and the number of sampling layers. The multiple connecting rods 39 and the connecting sleeves 310 can be connected to each other to connect the multiple intermediate tubes 11, and then the uppermost connecting rod 39 is installed on the external equipment so that it can control the depth of water inflow. Then, the fixing pin 213 on each synchronization rod 26 is positioned according to different depth intervals so that it can generate different pulling forces at the same moving distance. At this time, the preparation work is completed and sampling can be carried out.

[0034] After the device is placed underwater, multiple different intermediate tubes 11 and control tubes 21 enter different water depths. Due to different water depths, there will be different water pressures. Figure 9Therefore, when the position of the fixing pin 213 is adjusted, the fixing pin 213 on the middle tube 11 at the maximum water depth is inserted into the side away from the pull plate 28, and then moves upward to the position close to the pull plate 28. When the fixing pin 213 passes through the through hole 211 and is threaded into the threaded hole 212, the tension spring 29 between the fixing pin 213 and the pull plate 28 is in a state of no force. When the synchronization rod 26 moves, only the tension spring 29 between the fixing pin 213 and the middle tube 11 can be stretched. Each tension spring 29 has the same model, so changing the position of the fixing pin 213 will only change the effective number of coils of the tension spring 29. Since the model of the tension spring 29 is the same, when the effective number of coils is less (according to the stiffness coefficient formula k = (G ) / (8 D³ N) where: k = spring constant (N / m), G = shear modulus (Pa), d = wire diameter (m), D = spring mean diameter (m), N = number of effective turns) The larger the spring constant, the greater the tension generated by tension spring 29 for the same displacement. The spring constant is the largest on the middle tube 11 at the bottom and then decreases upward, generating gradually increasing tension to correspond to the increasing water pressure.

[0035] See also Figure 3 First, when in a normal state, the through groove 27 on the piston disc 25 is slidably connected to the head section 24. When in water, since the piston disc 25 is sealed and slidably connected to the control groove 22, the water pressure will push the piston disc 25 to slide. Since the synchronous rod 26 can transmit the corresponding pulling force, the telescopic rod 33 will also slide accordingly. Since the annular groove 35 is on the telescopic rod 33, as the sliding continues, the annular groove 35 gradually moves toward the position of the water inlet groove 31. Please refer to Figure 6 , until the piston disc 25 stops moving when it moves to the corresponding depth and the water pressure and the tension of the tension spring 29 are equal. At this time, the annular groove 35 and the water inlet groove 31 are in a connected state, and the rightmost end of the annular groove 35 passes over the rightmost side of the water inlet groove 31, but the leftmost side of the annular groove 35 does not pass over the left side of the water inlet groove 31. At this time, the water inlet groove 31, the annular groove 35 and the water inlet hole 34 are connected, and then the water will flow into the water storage tank 36 and the expansion tank 311, so the sampling process will be carried out. When the tension and water pressure are the same, please refer to Figure 4The through groove 27 on the piston disc 25 also passes the head section 24 and is located between the head section 24 and the tail section 23, and the left end of the piston disc 25 passes the right end of the head section 24 by a short distance, but the through groove 27 is not connected to the tail section 23, so the through groove 27 will connect the two sides of the control groove 22, and the water inlet speed of the through groove 27 is lower than the water inlet speed of the water inlet groove 31. First, enough water samples are stored in the expansion tank 311, and then after a while, the space between the piston disc 25 and the control groove 22 is also filled with water through the through groove 27. Therefore, the two ends of the piston disc 25 are in a connected state, so only the area of ​​the limit block 214 minus the area of ​​the synchronization rod 26 will generate pressure. The pressure at this time will be less than the tension, so under the action of the tension spring 29, it will gradually return until the annular groove 35 and the transverse groove 32 are in a sealed state, and the water inlet groove 31 and the transverse groove 32 are sealed, and then the sealing of the sample is ensured, avoiding contamination during the removal stage, thereby completing the sampling process.

[0036] See also Figure 4 When the water depth exceeds the designed water pressure, the annular groove 35 will directly pass over the water inlet groove 31, thereby generating a seal again, avoiding sampling that does not meet the requirements, and after the annular groove 35 passes over the water inlet groove 31, the through groove 27 and the synchronous sliding connection are connected to the tail section 23, so that the two ends of the through groove 27 will not be connected, avoiding pressure relief and ensuring the sealing effect.

[0037] See also Figures 4 to 8 The water inlet mechanism includes a water inlet groove 31 formed between the control tube 21 and the intermediate tube 11. The control tube 21 and the intermediate tube 11 are respectively provided with a transverse groove 32 coaxially. A telescopic rod 33 is slidably connected in the transverse groove 32. The telescopic rod 33 is provided with a plurality of water inlet holes 34 and annular grooves 35. The plurality of water inlet holes 34 are connected to the annular grooves 35. The water inlet mechanism also includes a water storage groove 36 provided in the intermediate tube 11. The water storage groove 36 is connected to the transverse groove 32. The intermediate tube 11 is provided with a water storage groove 36 connected to the water storage groove 36. The horizontal groove 32 and the exhaust groove 37 of the water storage tank 36, the telescopic rod 33 is provided with an air outlet groove 38, the air outlet groove 38 is connected to a water inlet hole 34, the upper ends of the multiple intermediate tubes 11 are installed with connecting rods 39, the lower ends of the multiple intermediate tubes 11 are installed with connecting sleeves 310, the multiple connecting rods 39 and the connecting sleeves 310 are respectively detachably connected in sequence, and the exhaust groove 37 is close to the water storage tank 36 and close to the side of the connecting rod 39, and each intermediate tube 11 is respectively threadedly installed with an expansion tank 311.

[0038] When sampling, the water inlet pipe on one side of the connecting sleeve 310 is at the lower end, so the water entering the water storage tank 36 will accumulate in the water storage tank 36 on the side of the connecting sleeve 310. Figure 6The air then passes through the exhaust groove 37 at the upper end into the air outlet groove 38, and then passes through the corresponding water inlet hole 34 into the water inlet groove 31 to discharge the bubbles, thus playing the role of exhaust, thereby ensuring the continuity of collection.

[0039] In all the schemes mentioned above, the connection between the two parts can be selected according to actual conditions by welding, bolt and nut connection, bolt or screw connection or other well-known connection methods, which will not be described here one by one. In the above, all fixed connections are preferably considered to be welding. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sampling device for water quality monitoring, comprising a plurality of intermediate tubes (11); wherein: The invention also includes a control mechanism, wherein the control mechanism includes a control tube (21) coaxially arranged with the intermediate tube (11), a control groove (22) is provided in the control tube (21), two groups of coaxially arranged tail sections (23) and head sections (24) are installed in the control groove (22), and a gap is provided between each group of the head section (24) and the tail section (23), a piston disc (25) is slidably installed in the control groove (22), and a synchronization rod (26) is coaxially installed on the piston disc (25). The piston disc (25) is provided with two through grooves (27), and the through grooves (27) and the head section (24) are coaxially arranged; the water inlet mechanism comprises a water inlet groove (31) formed between the control tube (21) and the intermediate tube (11), the control tube (21) and the intermediate tube (11) are coaxially provided with transverse grooves (32), a telescopic rod (33) is slidably connected in the transverse groove (32), and a plurality of water inlet holes (34) are provided on the telescopic rod (33). and an annular groove (35), a plurality of the water inlet holes (34) are connected to the annular groove (35), the control mechanism further comprises a pull plate (28) mounted on the synchronization rod (26), a tension spring (29) is connected between the pull plate (28) and the intermediate tube (11), a pull sleeve (210) is evenly spaced and mounted on the tension spring (29), a plurality of the pull sleeves (210) are slidably connected to the synchronization rod (26), each of the pull sleeves (210) is provided with a through hole (211), the A plurality of threaded holes (212) are provided on the synchronization rod (26), a fixing pin (213) passes through the through hole (211) and is threadedly connected in the threaded hole (212), a limiting block (214) is coaxially installed on the telescopic rod (33), a limiting groove (215) is provided in the control tube (21), the limiting block (214) is slidably connected in the limiting groove (215), and a plurality of bidirectional rods (216) are installed at equal intervals between the control tube (21) and the intermediate tube (11).

2. A water quality monitoring sampling device according to claim 1, characterized in that: The water inlet mechanism further comprises a water storage tank (36) provided in the intermediate tube (11), the water storage tank (36) being connected to the transverse groove (32), an air exhaust groove (37) being provided in the intermediate tube (11) and being connected to the transverse groove (32) and the water storage tank (36), and an air outlet groove (38) being provided on the telescopic rod (33), and the air outlet groove (38) being connected to one of the water inlet holes (34).

3. A water quality monitoring sampling device according to claim 2, characterized in that: Connecting rods (39) are installed at the upper ends of the plurality of intermediate tubes (11), and connecting sleeves (310) are installed at the lower ends of the plurality of intermediate tubes (11). The plurality of connecting rods (39) and connecting sleeves (310) are detachably connected in sequence, and one end of the exhaust groove (37) close to the water storage groove (36) is close to one side of the connecting rod (39).

4. The water quality monitoring sampling device according to claim 1, characterized in that: An expansion tank (311) is threadedly mounted on each intermediate tube (11).

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