Sampling device for monitoring water environments

Abstract

This utility model discloses a sampling device for water environment monitoring, belonging to the field of water environment monitoring technology. The sampling device includes a sampling rod and a pressure controller. The sampling rod has multiple sampling holes evenly distributed along its length. Each sampling hole contains a piston, which is slidably connected to the corresponding sampling hole in a direction parallel to the axis of the corresponding sampling hole. A valve assembly is provided at the orifice of each sampling hole to control its opening and closing. An air guide passage is provided inside the sampling rod, and each sampling hole has a vent at its bottom. The sampling holes are connected to the air guide passage through the vent, which is also connected to the pressure controller. This water environment monitoring sampling device can simultaneously sample water at different depths as needed, and can prevent other water layers from entering the sampling holes, avoiding water sample contamination and improving the accuracy of the test results.

Description

Technical Field

[0001] This utility model relates to the field of water environment monitoring technology, specifically to a sampling device for water environment monitoring. Background Technology

[0002] Water environment monitoring focuses on the aquatic environment, employing physical, chemical, and biological techniques to conduct qualitative, quantitative, and systematic comprehensive analysis of pollutants and their related components, aiming to explore and study the patterns of change in water quality. Water environment monitoring provides reliable basic data for water environment management and a scientific basis for evaluating the effectiveness of treatment measures. To ensure that monitoring data accurately reflects the current state of water quality and predicts the development trend of water pollution, the data must be representative, accurate, precise, parallel, repeatable, complete, and comparable.

[0003] When conducting water environment monitoring, it is usually necessary to sample the water body. Existing water environment sampling devices are not convenient for sampling water at different depths at the same time according to the needs, which affects the accuracy of the test results. Therefore, in order to overcome the problems in the prior art, this utility model provides a sampling device for water environment monitoring. Utility Model Content

[0004] The purpose of this invention is to overcome the problems in the prior art and provide a water environment monitoring sampling device that can simultaneously sample water at different depths according to needs, and can prevent other layers of water from entering the sampling hole, thus avoiding water sample contamination and improving the accuracy of the test results.

[0005] The water environment monitoring sampling device provided by this utility model includes:

[0006] A sampling rod is provided with multiple sampling holes, which are evenly distributed along the length of the sampling rod. Each sampling hole is provided with a piston, which is slidably connected to the corresponding sampling hole. The sliding direction is parallel to the axial direction of the corresponding sampling hole. A valve assembly is provided at the opening of the sampling hole, which is used to control the opening and closing of the sampling hole opening.

[0007] The air pressure controller has an air guide passage inside the sampling rod, and each sampling hole has an air vent at its bottom. Each sampling hole is connected to the air guide passage through the air vent. The air guide passage is also connected to the air pressure controller, and the air pressure controller is electrically connected to a power source.

[0008] Preferably, the valve assembly includes a sealing plug and a tension spring rod. The sealing plug is disposed in the corresponding sampling hole, located on the side of the corresponding piston near the sampling hole opening. A fixing platform is provided outside each sampling hole opening. One end of the tension spring rod is fixedly connected to the sampling rod through the fixing platform, and the other end extends into the corresponding sampling hole and is fixedly connected to the sealing plug. The axial direction of the tension spring rod is parallel to the axial direction of the corresponding sampling hole. The diameter of the sealing plug is smaller than the diameter of the corresponding sampling hole. Each sampling hole opening is provided with a shoulder. The diameter of the sealing plug is larger than the inner diameter of the corresponding shoulder. The shapes of the sides of the sealing plug and the shoulder that are close to each other are mutually adapted.

[0009] Preferably, the tension spring rod is fixedly connected to the middle of the corresponding sealing plug, and the axial direction of the tension spring rod is collinear with the axial direction of the corresponding sampling hole.

[0010] Preferably, the sealing plug is made of an elastic material, and when the pressure difference between the sampling hole and the external pressure is greater than a set value, the sealing plug is squeezed out of the sampling hole.

[0011] Preferably, the thickness of the sealing plug in the middle is greater than that around the perimeter, and the side of the sealing plug near the shoulder of the hole is a frustum.

[0012] Preferably, the fixed platform is L-shaped, with one end of the fixed platform being horizontally arranged and fixedly connected to the sampling rod, and the other end being vertically arranged downward and fixedly connected to the tension spring rod. The piston and the shoulder of the hole are adapted to each other in shape, and the inner diameter of the shoulder of the hole gradually increases from the inside to the outside along the corresponding sampling hole.

[0013] Preferably, the tension spring rod includes a fixed rod, a movable rod, and a tension spring. Both the fixed rod and the movable rod are hollow rods. One end of the movable rod is sleeved and slidably connected to one end of the fixed rod, and the other end is fixedly connected to the sealing plug. The end of the fixed rod away from the sealing plug is fixedly connected to the sampling rod through a fixed platform. The tension spring is disposed inside the hollow space between the fixed rod and the movable rod. The diameter of the movable rod is smaller than the inner diameter of the corresponding shoulder.

[0014] Preferably, it also includes a pressing handle, which is fixedly connected to the outer wall of the movable rod.

[0015] Preferably, the system also includes multiple solenoid valves, each corresponding to a vent port. The solenoid valve is located within the corresponding vent port and is electrically connected to a power source.

[0016] Preferably, it also includes a bellows, which is disposed between the pressure controller and the sampling rod. A pressure sensor is installed inside the bellows. The pressure sensor is electrically connected to a power source. The pressure sensor is connected to the pressure controller via a controller signal. The two ends of the bellows are respectively connected to the pressure controller and the air guide passage.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] This utility model's water environment monitoring sampling device uses a sampling rod and a pressure controller. Multiple sampling holes are set on the sampling rod, and a piston is installed inside each hole. The pressure controller is connected to a vent at the bottom of the sampling hole via an air passage. By changing the air pressure in the air passage, the piston slides within the sampling hole. A valve assembly is installed at the orifice of the sampling hole. Before submerging, the orifice is closed. After submersion, the orifice is opened, and the pressure controller is activated to move the piston towards the vent, drawing water into the sampling hole. The orifice is then closed again, and the device is removed from the water, thus completing the water sample collection. This device can simultaneously sample water at different depths as needed, while preventing other water layers from entering the sampling hole, avoiding water sample contamination, and improving the accuracy of the test results. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a partially enlarged structural schematic diagram A of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Sampling rod; 11. Sampling hole; 111. Vent; 112. Shoulder; 12. Piston; 13. Air passage; 14. Fixing platform; 2. Air pressure controller; 3. Valve assembly; 31. Sealing plug; 32. Fixing rod; 33. Moving rod; 34. Tension spring; 4. Solenoid valve; 5. Bellows; 6. Press handle. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the protection scope of this utility model.

[0024] The sampling device for water environment monitoring provided by this utility model includes a sampling rod 1 and a pressure controller 2. The sampling rod 1 has multiple sampling holes 11 evenly distributed along its length. Each sampling hole 11 has a piston 12 slidably connected to the corresponding sampling hole 11, with the sliding direction parallel to the axial direction of the corresponding sampling hole 11. A valve assembly 3 is provided at the opening of each sampling hole 11 to control its opening and closing. The sampling rod 1 has a gas guiding passage 13, and each sampling hole 11 has a vent 111 at its bottom. Each sampling hole 11 is connected to the gas guiding passage 13 via the vent 111. The gas guiding passage 13 is also connected to the pressure controller 2, which is electrically connected to a power source. By providing multiple sampling holes 11 on the sampling rod 1 and pistons 12 within each sampling hole 11, the pressure controller 2 connects to the vent 111 at the bottom of each sampling hole 11 via the gas guiding passage 13. 1. By connecting the air pressure controller 2 and changing the air pressure in the air passage 13, the piston 12 can slide within the sampling hole 11, increasing the air pressure in the air passage 13. The piston 12 slides away from the vent 111, decreasing the air pressure in the air passage 13. The piston 12 slides closer to the vent 111. By setting a valve assembly 3 at the opening of the sampling hole 11, the opening of the sampling hole 11 is closed before entering the water. After entering the water, the opening of the sampling hole 11 is opened, and the air pressure controller 2 is activated to move the piston 12 toward the vent 111, drawing water into the sampling hole 11. Then, the opening of the sampling hole 11 is closed, and the device is removed from underwater, thus completing the water sample collection. Using the above technical solution, water samples at different depths can be collected simultaneously as needed, while preventing other layers of water from entering the sampling hole, avoiding water sample contamination, and improving the accuracy of the test results.

[0025] In a preferred embodiment, the valve assembly 3 includes a sealing plug 31 and a tension spring rod. The sealing plug 31 is disposed in the corresponding sampling hole 11, located on the side of the corresponding piston 12 near the opening of the sampling hole 11. A fixing platform 14 is provided outside the opening of each sampling hole 11. One end of the tension spring rod is fixedly connected to the sampling rod 1 via the fixing platform 14, and the other end extends into the corresponding sampling hole 11 and is fixedly connected to the sealing plug 31. The axial direction of the tension spring rod is parallel to the axial direction of the corresponding sampling hole 11. The diameter of the sealing plug 31 is smaller than the diameter of the corresponding sampling hole 11. Each sampling hole 11 has a shoulder 112 at its opening. The diameter of the sealing plug 31 is larger than the inner diameter of the corresponding shoulder 112. The shapes of the sides of the sealing plug 31 and the shoulder 112 that are close to each other are mutually adapted. The tension spring rod has the force to pull the sealing plug 31 outward from the sampling hole 11. The shoulder 112 blocks the sealing plug 31 inside the sampling hole 11. Before entering the water, the piston 12 is close to the sealing plug 31. The shoulder 112 is tightly attached, effectively blocking the opening of the sampling hole 11. After water is introduced, the air pressure controller 2 is activated, reducing the air pressure in the air passage 13. This causes the piston 12 to move towards the vent 111. The air pressure between the piston 12 and the sealing plug 31 decreases, and the external water pressure pushes the sealing plug 31, causing it to move towards the vent 111. The sealing plug 31 separates from the shoulder 112, and can no longer block the opening of the sampling hole 11. The external water flow... The water is fed into the sampling hole 11 until the sum of the water pressure inside the sampling hole 11 and the tension of the tension spring rod is greater than the external water pressure. The tension spring rod then pulls the sealing plug 31 away from the vent 111, so that the sealing plug 31 is tightly pressed against the shoulder 112 again, and the opening of the sampling hole 11 is resealed. By adopting the above technical solution, the sealing plug 31 can be easily opened by moving the piston 12, and the water sample can be collected into the sampling hole 11. At the same time, the opening is automatically sealed after the sampling is completed.

[0026] As a preferred method, the tension spring rod is fixedly connected to the middle of the corresponding sealing plug 31, and the axial direction of the tension spring rod is collinear with the axial direction of the corresponding sampling hole 11. By adopting the above technical solution, it is possible to prevent the tension spring rod from pulling the sealing plug 31 off-center.

[0027] As a preferred method, the sealing plug 31 is made of elastic material. When the pressure difference between the sampling hole 11 and the external pressure is greater than the set value, the sealing plug 31 is squeezed out of the sampling hole 11. The air pressure controller 2 increases the air pressure in the air passage 13, causing the piston 12 to move away from the air inlet 111, thereby increasing the pressure in the sampling hole 11 and squeezing the sealing plug 31 out of the sampling hole 11. By adopting the above technical solution, the water sample can be easily taken out from the sampling hole 11.

[0028] As a preferred approach, the thickness of the middle part of the sealing plug 31 is greater than that of the surrounding area, and the side of the sealing plug 31 near the shoulder 112 is a frustum. By adopting the above technical solution, it is easy to squeeze the sealing plug 31 out of the sampling hole 11 and avoid the sealing plug 31 getting stuck in the sampling hole 11.

[0029] As a preferred embodiment, the fixed platform 14 is L-shaped. One end of the fixed platform 14 is horizontally arranged and fixedly connected to the sampling rod 1, and the other end is vertically arranged downward and fixedly connected to the tension spring rod. The piston 12 and the shoulder 112 are mutually adapted in shape on the side that is close to each other. The inner diameter of the shoulder 112 gradually increases from the inside to the outside along the corresponding sampling hole 11. By adopting the above technical solution, it is easy for the water sample to flow out completely from the sampling hole 11.

[0030] As a preferred embodiment, the tension spring rod includes a fixed rod 32, a movable rod 33, and a tension spring 34. Both the fixed rod 32 and the movable rod 33 are hollow rods. One end of the movable rod 33 is sleeved and slidably connected to one end of the fixed rod 32, and the other end is fixedly connected to the sealing plug 31. The end of the fixed rod 32 away from the sealing plug 31 is fixedly connected to the sampling rod 1 through the fixing platform 14. The tension spring 34 is located inside the hollow space between the fixed rod 32 and the movable rod 33. The diameter of the movable rod 33 is smaller than the inner diameter of the corresponding shoulder 112. With the above technical solution, the tension spring rod has a large extension range.

[0031] As a preferred method, a pressing handle 6 is also included. The pressing handle 6 is fixedly connected to the outer wall of the movable rod 33. By adopting the above technical solution, after the water sample is taken out from the sampling hole 11, the sealing plug 31 can be pressed back into the sampling hole 11 by pressing the pressing handle 6.

[0032] As a preferred approach, multiple solenoid valves 4 are also included. Each solenoid valve 4 corresponds to a vent 111. The solenoid valve 4 is located in the corresponding vent 111 and is electrically connected to a power source. By adopting the above technical solution, the opening and closing of the vent 111 can be controlled by the solenoid valve 4, thereby selecting the appropriate sampling port 11 for sampling according to the situation.

[0033] As a preferred embodiment, a bellows 5 is also included. The bellows 5 is located between the pressure controller 2 and the sampling rod 1. A pressure sensor is installed inside the bellows 5. The pressure sensor is electrically connected to a power source and is connected to the pressure controller 2 via a controller signal. The two ends of the bellows 5 are respectively connected to the pressure controller 2 and the air passage 13. By adopting the above technical solution, it is convenient for the sampling rod 1 to move underwater. At the same time, the pressure sensor can accurately sense the air pressure in the bellows 5 and the air passage 13, so that the pressure controller 2 can better control the air pressure in the air passage 13.

[0034] In the description of this utility model, it should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sampling device for water environment monitoring, characterized in that, include: A sampling rod (1) is provided with a plurality of sampling holes (11). The sampling holes (11) are evenly distributed along the length direction of the sampling rod (1). A piston (12) is provided in each sampling hole (11). The piston (12) is slidably connected in the corresponding sampling hole (11). The sliding direction is parallel to the axial direction of the corresponding sampling hole (11). A valve assembly (3) is provided at the opening of the sampling hole (11). The valve assembly (3) is used to control the opening and closing of the sampling hole (11). The air pressure controller (2) has an air guide passage (13) inside the sampling rod (1), and each sampling hole (11) has an air vent (111) at its bottom end. The sampling holes (11) are connected to the air guide passage (13) through the air vent (111). The air guide passage (13) is also connected to the air pressure controller (2). The air pressure controller (2) is electrically connected to a power source. The valve assembly (3) includes a sealing plug (31) and a tension spring rod. The sealing plug (31) is located in the corresponding sampling hole (11) and on the side of the corresponding piston (12) near the opening of the sampling hole (11). A fixed platform (14) is provided outside the opening of the sampling hole (11). One end of the tension spring rod is fixedly connected to the sampling rod (1) through the fixed platform (14), and the other end extends into the corresponding sampling hole (11) and is fixedly connected to the sealing plug (31). The axial direction of the tension spring rod is parallel to the axial direction of the corresponding sampling hole (11). The diameter of the sealing plug (31) is smaller than the diameter of the corresponding sampling hole (11). The opening of the sampling hole (11) is provided with a shoulder (112). The diameter of the sealing plug (31) is larger than the inner diameter of the corresponding shoulder (112). The shapes of the sides of the sealing plug (31) and the shoulder (112) that are close to each other are adapted to each other.

2. The sampling device for water environment monitoring as described in claim 1, characterized in that, The tension spring rod is fixedly connected to the middle of the corresponding sealing plug (31), and the axial direction of the tension spring rod is collinear with the axial direction of the corresponding sampling hole (11).

3. The sampling device for water environment monitoring as described in claim 1, characterized in that, The sealing plug (31) is made of elastic material. When the pressure difference between the sampling hole (11) and the external pressure is greater than the set value, the sealing plug (31) is squeezed out of the sampling hole (11).

4. The sampling device for water environment monitoring as described in claim 3, characterized in that, The thickness of the middle part of the sealing plug (31) is greater than that of the surrounding parts, and the side of the sealing plug (31) near the shoulder (112) is a frustum.

5. The sampling device for water environment monitoring as described in claim 3, characterized in that, The fixed platform (14) is L-shaped. One end of the fixed platform (14) is horizontally arranged and fixedly connected to the sampling rod (1), and the other end is vertically arranged downward and fixedly connected to the tension spring rod. The piston (12) and the shoulder (112) are mutually adapted to each other on the side that is close to the shoulder (112). The inner diameter of the shoulder (112) gradually increases from the inside to the outside along the corresponding sampling hole (11).

6. The sampling device for water environment monitoring as described in claim 3, characterized in that, The tension spring rod includes a fixed rod (32), a movable rod (33), and a tension spring (34). Both the fixed rod (32) and the movable rod (33) are hollow rods. One end of the movable rod (33) is sleeved and slidably connected to one end of the fixed rod (32), and the other end is fixedly connected to the sealing plug (31). The end of the fixed rod (32) away from the sealing plug (31) is fixedly connected to the sampling rod (1) through a fixed platform (14). The tension spring (34) is located inside the hollow space between the fixed rod (32) and the movable rod (33). The diameter of the movable rod (33) is smaller than the inner diameter of the corresponding shoulder (112).

7. The sampling device for water environment monitoring as described in claim 6, characterized in that, It also includes a pressing handle (6), which is fixedly connected to the outer wall of the movable rod (33).

8. The sampling device for water environment monitoring as described in claim 1, characterized in that, It also includes multiple solenoid valves (4), each of which corresponds to a vent (111). The solenoid valve (4) is located in the corresponding vent (111) and is electrically connected to a power source.

9. The sampling device for water environment monitoring as described in claim 1, characterized in that, It also includes a bellows (5), which is located between the air pressure controller (2) and the sampling rod (1). A pressure sensor is installed inside the bellows (5). The pressure sensor is electrically connected to the power supply. The pressure sensor is connected to the air pressure controller (2) through the controller signal. The two ends of the bellows (5) are respectively connected to the air pressure controller (2) and the air passage (13).

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