Sampling equipment for water quality monitoring

Abstract

The invention provides sampling equipment for water quality monitoring, and relates to the technical field of monitoring sampling, the sampling equipment comprises a control pipe with a middle pipe coaxially arranged, a control groove is formed in the control pipe, two groups of tail sections and head sections which are coaxially arranged are mounted in the control groove, and a gap is formed between each group of head section and tail section; a piston disc is slidably mounted in the control groove, a synchronous rod is coaxially mounted on the piston disc, two through grooves are formed in the piston disc, and the through grooves and the head section are coaxially arranged. The sampling efficiency is improved due to the design, and the problem that sampling at different depths can be completed by lowering traditional equipment for multiple times is solved.

Description

Technical Field

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

[0002] In the current fields of water quality monitoring and environmental research, water sample collection is a crucial step. However, existing water sample collection technologies and devices have some limitations, which seriously affect the accuracy and representativeness of sampling. Most existing devices can only sample at a single water depth. This single-depth sampling method cannot comprehensively reflect the water quality conditions of different depth layers in the water body because the physical, chemical, and biological characteristics of the water body often vary with depth. For example, parameters such as temperature, dissolved oxygen, and nutrient concentration may vary significantly in different water layers. Therefore, relying solely on samples from a single depth is difficult to accurately assess the ecological status and pollution level of the entire water body, which may lead to deviations in research results and mistakes in environmental management decisions.

[0003] In addition, existing sampling devices also face severe challenges in sample sealing and preservation. After collecting deep water samples, the device often fails to 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, contaminating the deep water sample that has been collected. This contamination not only changes the chemical composition of the sample but may also introduce microbial communities from different depths, thus seriously affecting the accuracy of water quality analysis. Summary of the Invention

[0004] (I) Technical Problems to be Solved 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 art.

[0005] (II) Technical Solutions To achieve the above object, the present invention provides the following technical solutions: A sampling device for water quality monitoring includes a plurality of intermediate tubes; and a control mechanism. The control mechanism includes a control tube coaxially arranged with the intermediate tube. A control groove is formed in the control tube. Two groups of coaxially arranged tail sections and head sections are installed in the control groove. There is a gap between each head section and tail section. A piston disk is slidably installed in the control groove. A synchronous rod is coaxially installed on the piston disk. Two through grooves are formed in the piston disk, and the through grooves are coaxially arranged with the head sections; a water inlet mechanism. The water inlet mechanism includes a water inlet groove formed between the control tube and the intermediate tube. Transverse grooves are coaxially formed in the control tube and the intermediate tube respectively. A telescopic rod is slidably connected in the transverse groove. A plurality of water inlet holes and an annular groove are formed in the telescopic rod. The plurality of water inlet holes communicate with the annular groove.

[0006] Preferably, the control mechanism further includes a pull disc mounted on the synchronization rod. A tension spring is connected between the pull disc and the intermediate pipe. Pull sleeves are equidistantly installed on the tension spring. A plurality of the pull sleeves are slidably connected to the synchronization rod. This design realizes the control of the sampling depth through the cooperation of the pull disc and the tension spring. The tension spring provides adjustable resilience, and the equidistantly installed pull sleeves ensure the uniform distribution of the pulling force. At the same time, the sliding connection mode of the pull sleeves on the synchronization rod improves the stability and reliability of the entire mechanism.

[0007] Preferably, through holes are respectively formed in each of the pull sleeves, and a plurality of threaded holes are formed in the synchronization rod. Fixing pins pass through the through holes and are threadedly connected in the threaded holes. This design realizes the precise adjustment of the position of the pull sleeves through the cooperation of the fixing pins and the threaded holes, enabling the pulling force of each sampling layer to be independently adjusted according to the water depth and ensuring the adaptability of use.

[0008] Preferably, a limiting block is coaxially installed on the telescopic rod, and a limiting groove is formed in the control pipe. The limiting block is slidably connected in the limiting groove. This design ensures that the telescopic rod always remains on a predetermined track during movement through the cooperation of the limiting block and the limiting groove, preventing deviation or rotation, and at the same time limits the stroke range of the telescopic rod, improving the reliability of the device.

[0009] Preferably, a plurality of bidirectional rods are equidistantly installed between the control pipe and the intermediate pipe. This design strengthens the connection strength between the control pipe and the intermediate pipe through the uniform distribution of the plurality of bidirectional rods, ensures the coaxiality between the two, and at the same time improves the rigidity of the entire structure, preventing deformation or shaking during use.

[0010] Preferably, the water inlet mechanism further includes a water storage tank formed in the intermediate pipe. The water storage tank communicates with the transverse groove. An exhaust groove communicating with the transverse groove and the water storage tank is formed in the intermediate pipe. An air outlet groove is formed in the telescopic rod. The air outlet groove communicates with one of the water inlet holes. This design forms a complete water sample collection and bubble elimination 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, avoiding the influence of bubbles on the sampling quality, and at the same time ensuring the convenience of sampling.

[0011] Preferably, connecting rods are installed at the upper ends of the plurality of intermediate pipes, and connecting sleeves are installed at the lower ends of the plurality of intermediate pipes. The plurality of connecting rods and connecting sleeves are respectively detachably connected in sequence, and one end of the exhaust groove close to the water storage tank is close to one side of the connecting rod. This design realizes the modular assembly of the device through the detachable connection method of the connecting rod and the connecting sleeve, facilitates adjusting the sampling layers according to actual needs, and at the same time, the special position design of the exhaust groove ensures that the bubbles can be discharged smoothly, improving the exhaust efficiency.

[0012] Preferably, an expansion tank is threadedly installed on each of the intermediate pipes. This design increases the water storage capacity of each sampling layer through the setting of the expansion tank, ensures sufficient sample volume for various detection needs, and at the same time, the threaded connection method facilitates the installation and disassembly of the expansion tank, is convenient for cleaning and maintenance, and improves the practicability of the device.

[0013] (III) Beneficial Effects Compared with the prior art, the present invention provides a sampling device for water quality monitoring, having the following beneficial effects: This device realizes the function of multi-depth synchronous sampling. Through the pipes arranged in multiple layers, each layer is equipped with an independent control mechanism, enabling the device to sample simultaneously at different water depths. This design improves the sampling efficiency and avoids the problem that traditional devices need 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 time point. Secondly, through the design of the spring assembly, the device realizes the automatic adaptation to pressures at different depths. The spring stiffness coefficient of each sampling device has been accurately calculated to correspond to the pressure at its water depth. This design ensures ideal sampling effects at different water depths and also avoids sample contamination caused by excessive water pressure. When the sampling is completed, through the cooperation of the piston disk and the through groove, the sample can be automatically sealed. This design effectively prevents water body pollution during the sample extraction process, ensuring the purity and representativeness of the sample. Especially when the water depth exceeds the design range, the device will be sealed to avoid collecting samples that do not meet the requirements. Description of the Drawings

[0014] Figure 1 is the overall structural schematic diagram of a sampling device for water quality monitoring in the present invention; Figure 2 is the structural schematic diagram of the control pipe and the intermediate pipe in the present invention; Figure 3 is the cross-sectional structural schematic diagram of the water inlet pipe and the control pipe in the present invention; Figure 4 is the cross-sectional structural schematic diagram of the telescopic rod and the control pipe in the present invention; Figure 5 is the cross-sectional structural schematic diagram of the control pipe in the present invention; Figure 6 It is a schematic cross-sectional structure diagram of the intermediate pipe and the telescopic rod in the present invention; Figure 7 It is a schematic cross-sectional structure diagram of the intermediate pipe in the present invention; Figure 8 It is a schematic cross-sectional structure diagram of the telescopic rod in the present invention; Figure 9 It is an exploded structure diagram of the synchronizing rod and the fixing pin in the present invention; Figure 10 It is a structural diagram of the fixing rod and the pulling disc in the present invention.

[0015] In the figure: 11, intermediate pipe; 21, control pipe; 22, control groove; 23, tail section; 24, head section; 25, piston disc; 26, synchronizing rod; 27, through groove; 28, pulling disc; 29, pulling 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, pulling sleeve; 211, perforation; 212, threaded hole; 213, fixing pin; 214, limiting block; 215, limiting groove; 216, bidirectional rod; 310, connecting sleeve; 311, expansion tank. Detailed implementation manners

[0016] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0017] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0018] In the present invention, unless otherwise stated, the orientations such as "upper, lower" are generally in the directions shown in the drawings, or in the vertical, perpendicular or gravitational directions; similarly, for ease of understanding and description, "left, right" are generally left and right as shown in the drawings; "inside, outside" refer to inside and outside the contours of the respective components, but the above orientation terms are not used to limit the present invention.

[0019] Please refer to Figures 1 to 10, A sampling device for water quality monitoring, including multiple intermediate pipes 11; it also includes a control mechanism. The control mechanism includes a control pipe 21 coaxially arranged with the intermediate pipe 11. A control groove 22 is opened in the control pipe 21. Two groups of coaxially arranged tail sections 23 and head sections 24 are installed in the control groove 22. There is a gap between each group of head sections 24 and tail sections 23. A piston disk 25 is slidably installed in the control groove 22. A synchronous rod 26 is coaxially installed on the piston disk 25. Two through grooves 27 are opened on the piston disk 25, and the through grooves 27 are coaxially arranged with the head sections 24. The control mechanism also includes a pulling disk 28 installed on the synchronous rod 26. A pulling spring 29 is connected between the pulling disk 28 and the intermediate pipe 11. Pulling sleeves 210 are equidistantly installed on the pulling spring 29. The multiple pulling sleeves 210 are slidably connected to the synchronous rod 26. A through hole 211 is opened on each pulling sleeve 210. Multiple threaded holes 212 are opened on the synchronous 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 opened in the control pipe 21. The limiting block 214 is slidably connected in the limiting groove 215. Multiple bidirectional rods 216 are equidistantly installed between the control pipe 21 and the intermediate pipe 11.

[0020] Before sampling the corresponding water area, the corresponding sampling device needs to be installed according to the depth of the water area to be sampled and the number of sampling layers. Connecting the multiple connecting rods 39 and connecting sleeves 310 to each other can connect the multiple intermediate pipes 11. Then, install the uppermost connecting rod 39 on an external device so that it can control the depth of water intake. Then, position the fixing pins 213 on each synchronous rod 26 according to different depth intervals so that different pulling forces can be generated at the same moving distance. At this time, the preparation work is completed and sampling can be carried out.

[0021] After the device is put into the water, the multiple different intermediate pipes 11 and control pipes 21 enter different water depths respectively. Due to different water pressures at different water depths, please refer to Figure 9 , so when adjusting the position of the fixing pin 213, the fixing pin 213 on the intermediate pipe 11 at the maximum water depth position is inserted on the side away from the pulling disk 28, and then successively closer to the pulling disk 28 upwards. When the fixing pin 213 passes through the through hole 211 and is threadedly connected in the threaded hole 212, the pulling spring 29 between the fixing pin 213 and the pulling disk 28 is in an unloaded state. When the synchronous rod 26 moves, only the pulling spring 29 between the fixing pin 213 and the intermediate pipe 11 can be stretched. Each pulling spring 29 has the same model. Therefore, changing the position of the fixing pin 213 only changes the effective number of turns of the pulling spring 29. Since the models of the pulling springs 29 are the same, when the effective number of turns is less (according to the stiffness coefficient formula k = (G ) / (8 D³ N) Where: k = stiffness coefficient (N / m), G = shear modulus (Pa), d = wire diameter (m), D = mean coil diameter of the spring (m), N = number of active coils). The greater the stiffness coefficient of the spring, the greater the tensile force generated by the tension spring 29 when it produces the same displacement. The stiffness coefficient of the middle tube 11 at the lowermost end is the largest, and then decreases gradually upwards, corresponding to the gradually increasing water pressure by generating gradually increasing tensile forces.

[0022] Please refer to Figure 3 , first when in the normal state, the through groove 27 on the piston disk 25 is slidably connected to the head section 24. When in water, since the piston disk 25 is hermetically and slidably connected within the control groove 22, under the action of water pressure, it will push the piston disk 25 to slide. Since the corresponding tensile force can be transmitted through the synchronizing rod 26, and the telescopic rod 33 will also slide accordingly. Since the annular groove 35 is located on the telescopic rod 33, as the continuous sliding progresses, the annular groove 35 gradually moves towards the position of the water inlet groove 31. Please refer to Figure 6 , until the piston disk 25 stops moving when the water pressure at the corresponding depth is the same as the tensile force of the tension spring 29. At this time, the annular groove 35 and the water inlet groove 31 are in a communicating state, and the rightmost end of the annular groove 35 crosses the rightmost side of the water inlet groove 31, but the leftmost side of the annular groove 35 does not cross 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 in communication, and then water will flow into the water storage tank 36 and the expansion tank 311, so the sampling process will be carried out. When the tensile force and the water pressure are the same, please refer to Figure 4 , the through groove 27 on the piston disk 25 also crosses the head section 24 and is located between the head section 24 and the tail section 23, and the left end of the piston disk 25 crosses the right end of the head section 24 by a small distance, but the through groove 27 is not in communication with the tail section 23. Therefore, the through groove 27 will communicate the two sides of the control groove 22, and the water inlet speed of the through groove 27 is less than the water inlet speed of the water inlet groove 31. First, the expansion tank 311 stores enough water samples, and then after a while, the space between the piston disk 25 and the control groove 22 is also filled with water through the through groove 27. Therefore, both ends of the piston disk 25 are in a communicating state, so only the pressure generated by subtracting the area of the synchronizing rod 26 from the area of the limit block 214 remains. At this time, the pressure will be less than the tensile force, 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, then the seal of the sample is ensured, avoiding contamination during the extraction stage, so the sampling process is completed.

[0023] Please refer to Figure 4When 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 failure to meet the requirements, and after the annular groove 35 passes over the water inlet groove 31, the through groove 27 is synchronously slidably 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.

[0024] 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, and the control tube 21 and the intermediate tube 11 are respectively provided with a transverse groove 32 coaxially, and a telescopic rod 33 is slidably connected in the transverse groove 32, and a plurality of water inlet holes 34 and annular grooves 35 are provided on the telescopic rod 33, and 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, and the water storage groove 36 is connected to the transverse groove 32, and a water storage groove 36 is provided in the intermediate tube 11, and a water storage groove 36 is connected to the transverse groove 32. The transverse groove 32 and the exhaust groove 37 of the water storage tank 36, the telescopic rod 33 is provided with an exhaust groove 38, the exhaust 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 the side of the connecting rod 39, and each intermediate tube 11 is respectively threadedly installed with an expansion tank 311.

[0025] When sampling, the water inlet pipe on one side of the connecting sleeve 310 is at the lower end, so water entering the water storage tank 36 will accumulate in the water storage tank 36 on one side of the connecting sleeve 310. Figure 6 Then the air 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.

[0026] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which will not be described one by one here. In the above, all fixed connections are preferably welded. 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 principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A sampling device for water quality monitoring, including a plurality of intermediate pipes (11) arranged; characterized in that: It further includes a control mechanism, the control mechanism includes a control pipe (21) coaxially arranged with the middle pipe (11), a control groove (22) is formed in the control pipe (21), two groups of coaxially arranged tail sections (23) and head sections (24) are installed in the control groove (22), there is a gap between each group of the head section (24) and the tail section (23), a piston disk (25) is slidably installed in the control groove (22), a synchronous rod (26) is coaxially installed on the piston disk (25), two through grooves (27) are formed in the piston disk (25), and the through grooves (27) are coaxially arranged with the head section (24); a water inlet mechanism, the water inlet mechanism includes a water inlet groove (31) formed between the control pipe (21) and the middle pipe (11), transverse grooves (32) are coaxially formed in the control pipe (21) and the middle pipe (11) respectively, a telescopic rod (33) is slidably connected in the transverse groove (32), a plurality of water inlet holes (34) and annular grooves (35) are formed in the telescopic rod (33), and the plurality of water inlet holes (34) communicate with the annular groove (35).

2. The sampling device for water quality monitoring according to claim 1, characterized in that: The control mechanism further includes a pull disk (28) installed on the synchronous rod (26), a pull spring (29) is connected between the pull disk (28) and the middle pipe (11), pull sleeves (210) are equidistantly installed on the pull spring (29), and the plurality of pull sleeves (210) are slidably connected to the synchronous rod (26).

3. The sampling device for water quality monitoring according to claim 2, characterized in that: Each pull sleeve (210) is respectively provided with a through hole (211), a plurality of threaded holes (212) are formed in the synchronous rod (26), and a fixing pin (213) passes through the through hole (211) and is threadedly connected in the threaded hole (212).

4. The sampling device for water quality monitoring according to claim 1, characterized in that: A limit block (214) is coaxially installed on the telescopic rod (33), a limit groove (215) is formed in the control pipe (21), and the limit block (214) is slidably connected in the limit groove (215).

5. The sampling device for water quality monitoring according to claim 1, characterized in that: A plurality of bidirectional rods (216) are equidistantly installed between the control pipe (21) and the middle pipe (11).

6. The sampling device for water quality monitoring according to claim 1, characterized in that: The water inlet mechanism further includes a water storage tank (36) formed in the middle pipe (11), the water storage tank (36) communicates with the transverse groove (32), an exhaust groove (37) communicating with the transverse groove (32) and the water storage tank (36) is formed in the middle pipe (11), an air outlet groove (38) is formed in the telescopic rod (33), and the air outlet groove (38) communicates with one of the water inlet holes (34).

7. The sampling device for water quality monitoring according to claim 6, characterized in that: Connecting rods (39) are installed at the upper ends of the plurality of middle pipes (11), connecting sleeves (310) are installed at the lower ends of the plurality of middle pipes (11), the plurality of connecting rods (39) and the connecting sleeves (310) are respectively detachably connected in sequence, and one end of the exhaust groove (37) close to the water storage tank (36) is close to one side of the connecting rod (39).

8. The sampling device for water quality monitoring according to claim 1, characterized in that: An expansion tank (311) is threadedly installed on each middle pipe (11).

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