Water quality sampling device

Abstract

The utility model relates to the technical field of water quality sampling, in particular to a water quality sampling device. Comprising a cylinder, an upper containing cavity and a lower containing cavity are formed in the cylinder from top to bottom, a partition plate is arranged between the upper containing cavity and the lower containing cavity, and the upper containing cavity comprises a set of cavities evenly distributed in the circumferential direction of the cylinder; the group of pistons respectively float in the cavity in a sealing manner; the group of pull rods are arranged in the lower accommodating cavity, correspond to the chambers one by one and axially extend to the chambers to be connected with the piston; the locking and releasing mechanism is in linkage with all the pull rods and has a first state for locking all the pistons at the same time and a second state for selectively releasing the single pull rod. According to the device, the multiple groups of independent cavities are combined with a linkage locking and releasing mechanism, and are matched with an elastic reset piston and a graduated lifting assembly, so that multi-depth water samples can be collected in a layered triggering manner by one-time lowering, the samples are ensured to be independently sealed and not mixed, and the sampling convenience and accuracy are improved.

Description

Technical Field

[0001] This utility model relates to the field of water quality sampling technology, and in particular to a water quality sampling device. Background Technology

[0002] Water sampling is a fundamental task in environmental monitoring, hydrological research, and pollution source tracing. Its core is to obtain water samples that are spatially representative and depth-differentiated. In vertical profile monitoring of rivers, lakes, or oceans, it is often necessary to collect stratified samples at different depths simultaneously to avoid interlayer mixing caused by water disturbance.

[0003] In existing technologies, most common water quality sampling devices employ a single sampling chamber design. The opening and closing of the chamber is controlled manually or mechanically to perform water sampling. In actual water quality sampling, multiple samples need to be collected from different locations and depths within the same body of water to obtain comprehensive and accurate water quality data. However, a single-chamber device can only complete one sampling at a time. To perform multiple samplings, the device must be repeatedly removed from the water, repositioned, and repositioned before the next sampling. This process is cumbersome, consuming significant time and manpower, and may also lead to water sample contamination due to frequent entry and exit of the device, affecting the accuracy of the test results. Therefore, a new water quality sampling device is urgently needed to solve these problems. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a water sampling device that solves the technical problems of low sampling efficiency, difficulty in collecting water samples from different depths in the same water area at one time, and susceptibility of water samples to pollution.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A water sampling device, comprising:

[0007] The cylindrical body includes, from top to bottom, an upper cavity and a lower cavity, with a partition between the upper cavity and the lower cavity. The upper cavity includes a set of chambers, which are evenly distributed along the circumference of the cylindrical body.

[0008] A set of pistons, each set of pistons being sealed and floatingly disposed within the cavity;

[0009] A set of pull rods is provided in the lower cavity, and the set of pull rods is provided one-to-one with a set of chambers. The pull rods extend axially into the chamber and are connected to the piston.

[0010] A locking and releasing mechanism is configured in conjunction with each lever to simultaneously lock all piston positions in a first state, and to selectively release a single lever in a second state.

[0011] A set of water inlets is provided on the side wall of the cylinder, and each water inlet is connected to a corresponding chamber.

[0012] Based on the above structure, the principle of the water sampling device is as follows: First, the sampling device is immersed in the water area to be sampled. In the initial state, all pistons are locked by the locking and releasing mechanism, i.e., the first state. At this time, the chamber is closed, and all water inlets do not enter due to the pistons being closed. Next, according to the requirements, the corresponding pull rods are released individually through the locking and releasing mechanism at different depths in the water area to be sampled. Since the pistons are sealed and floating in the chamber, the corresponding pistons rise to draw water, while the other pistons remain stationary, i.e., the second state. After the chamber is completely filled with water sample, the sampling work is completed. A set of chambers is evenly distributed along the circumference of the cylinder. With the pistons and locking and releasing mechanism, water samples at different depths can be collected in one descent of the device, improving sampling efficiency. Furthermore, each chamber is independent of the others to prevent water sample mixing and ensure the purity of the water sample, thereby improving the accuracy of subsequent testing.

[0013] Furthermore, in a water sampling device of this application, a cover plate is provided at the upper end of the cylinder, the cover plate is sealed on the cylinder, a guide rod is provided on the side of the piston away from the pull rod, the end of the guide rod away from the piston extends axially out of the outer side of the cover plate, and an elastic element is sleeved on the outer side of the guide rod, the two ends of the elastic element being connected to the cover plate and the piston respectively. As a preferred embodiment of this application, in a water sampling device of this application, the cover plate is sealed to the cylinder, forming a closed space at the top of the upper cavity, preventing water from seeping into the upper end of the cylinder during sampling and avoiding contamination of the sample by external impurities; in the initial state, the elastic element is in a stretched state, and the piston is located at the bottom of the cavity. When sampling is required, the locking release mechanism releases the pull rod, the elastic element resets, and the piston completes the water suction action under the drive of the elastic element; when it is necessary to empty the water sample in the cavity, the water sample in the cavity can be discharged by pressing down the guide rod; the guide rod ensures that the piston moves along the axis of the cylinder, avoiding piston tilting that could lead to sealing failure or jamming.

[0014] Furthermore, in a water sampling device of this application, a first sealing element is provided between the cover plate and the guide rod, and the first sealing element is installed at the through hole through which the guide rod passes through the cover plate. As a preferred embodiment of this application, in a water sampling device of this application, the first sealing element fills the gap between the guide rod and the through hole of the cover plate to prevent water, air, sediment, etc. from entering the cylinder from the guide rod exiting position during sampling, thereby preventing damage to the inside of the sampling device.

[0015] Furthermore, in a water sampling device of this application, the piston is provided with a groove, the groove being arranged along the circumference of the piston, and a second sealing element is provided within the groove. As a preferred embodiment of this application, in a water sampling device of this application, the second sealing element is installed within the circumferential groove of the piston, tightly fitting against the inner wall of the chamber to form an annular sealing strip, preventing water sample or air from leaking through the gap between the piston and the chamber during piston movement.

[0016] Furthermore, in a water sampling device of this application, a set of connecting pipes is provided in the lower cavity. The two ends of the connecting pipes are respectively connected to an inlet and a chamber. A one-way valve is provided on the connecting pipes, which is used to allow water samples to enter the chamber and prevent backflow. As a preferred embodiment of this application, in a water sampling device, during sampling, the piston moves upward, creating a negative pressure in the chamber. The one-way valve opens, and the water sample is drawn into the chamber through the inlet and connecting pipes. After the piston stops moving, the one-way valve closes to prevent water sample loss.

[0017] Furthermore, in a water sampling device of this application, the bottom of the cylinder is provided with a base plate, which is sealed and installed at the bottom of the cylinder. The locking and releasing mechanism includes: a drive motor, which is located in the lower cavity and is mounted on the base plate; a turntable, which is mounted on the rotating end of the drive motor. Each pull rod has a locking block near the turntable end. The turntable has a notch adapted to the shape of the locking block. When the locking and releasing mechanism is in the locked state, the locking block is located at the lower end of the turntable, and the locking block abuts against the turntable in the axial direction of the cylinder. When the drive motor drives the turntable to rotate by a preset angle, the notch aligns with the locking block, allowing the pull rod to gain axial freedom. As a preferred embodiment of this application, a water sampling device is provided. When the drive motor is not energized, the turntable is stationary at its initial angle. At this time, the locking blocks of all the pull rods are located at the lower edge of the turntable and are not aligned with the notches on the turntable. The upper surface of the locking blocks axially abuts against the lower surface of the turntable, forming a mechanical block. Since the turntable is stationary, the locking blocks cannot move upwards, thus limiting the piston. When the turntable rotates, when the notches are fully aligned with the locking blocks, the locking blocks lose the axial obstruction of the turntable, and the pull rods gain upward or downward freedom of movement, thereby resetting the piston and completing the water suction action. After sampling, emptying, or cleaning a single chamber, the piston is adjusted to the target position via the guide rod, and the drive motor is started to rotate the turntable. When the notches are aligned with the locking blocks, the locking blocks pass through the notches to the lower end of the turntable. The turntable continues to rotate, returning to the initial locking position, and the lower surface of the turntable again abuts against the upper surfaces of all the locking blocks, forming an axial block.

[0018] Furthermore, in a water sampling device of this application, the turntable has an annular groove on the side near the drive motor, and the locking block has a roller corresponding to the annular groove. The annular groove is used to accommodate the roller, and when the turntable rotates, the roller rolls within the groove. As a preferred embodiment of this application, in a water sampling device of this application, the locking block is equipped with a roller that cooperates with the annular groove on the side of the turntable near the motor, so that the axial sliding friction between the locking block and the turntable is converted into roller rolling, reducing mechanical wear of various components and improving service life. In addition, the annular groove provides radial limit for the roller, ensuring that the locking block does not circumferentially shift during axial movement, and avoiding jamming of the roller with the edge of the turntable due to shift.

[0019] Furthermore, a water sampling device according to this application also includes: a lifting mechanism and a lifting ring. The lifting mechanism includes: a lifting rope with graduations evenly distributed along the length of the rope to indicate the lowering depth of the rope. The rope is threaded onto the lifting ring, which is detachably mounted on a cover plate. As a preferred embodiment of this application, the lifting mechanism controls the lowering depth of the sampling device, achieves accurate sampling, and ensures operational safety and convenience. The evenly distributed graduations along the length of the rope allow operators to visually read the lowering depth of the device by observing the graduations on the water surface. Furthermore, during lowering, the depth can be adjusted in real-time by pulling or releasing the rope, combined with the graduations, to meet the needs of sampling at different depths. The detachably mounted lifting ring allows for quick disassembly when the rope needs to be replaced (e.g., for different lengths) or when the device needs maintenance, without requiring complete disassembly of the cover plate or the entire device.

[0020] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0021] The purpose of this invention is to provide a water quality sampling device that combines multiple circumferentially distributed independent chambers with a linkage locking and release mechanism, along with an elastic reset piston and a scaled lifting assembly, to enable multi-depth water sample collection by triggering layer-by-layer sampling with a single lowering of the device. This ensures that each sample is independently sealed and does not mix with others. At the same time, the device improves the convenience and accuracy of sampling operations through visual depth control. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of a water quality sampling device according to an embodiment of this application;

[0023] Figure 2 This is a cross-sectional view of a water quality sampling device according to an embodiment of this application;

[0024] Figure 3 This is a cross-sectional view of the cylinder of a water quality sampling device according to an embodiment of this application;

[0025] Figure 4 This is a diagram showing the internal structure of a water sampling device according to an embodiment of this application;

[0026] Figure 5 This is an exploded view of the locking and releasing mechanism in a water sampling device according to an embodiment of this application.

[0027] In the diagram: 1-Cylinder; 10-Inlet; 11-Upper cavity; 110-Cavity; 12-Lower cavity; 13-Baffle; 14-Cover plate; 15-Bottom plate; 16-Lifting ring; 17-Lifting rope; 2-Piston; 20-Cavity groove; 3-Pull rod; 31-Locking block; 311-Roller; 4-Locking release mechanism; 41-Drive motor; 42-Turntable; 420-Notch; 421-Annular groove; 5-Guide rod; 6-Elastic element; 7-First seal; 8-Second seal; 9-Check valve. Detailed Implementation

[0028] like Figure 1 , 2 As shown in Figure 3, a water quality sampling device includes:

[0029] The cylindrical body 1 includes, from top to bottom, an upper cavity 11 and a lower cavity 12. A partition 13 is provided between the upper cavity 11 and the lower cavity 12. The upper cavity 11 includes a set of chambers 110, which are evenly distributed along the circumference of the cylindrical body 1.

[0030] A set of pistons 2, each set of pistons 2 being sealed and floatingly disposed within the chamber 110;

[0031] A set of pull rods 3 are provided in the lower cavity 12. The set of pull rods 3 are arranged one-to-one with a set of chambers 110. The pull rods 3 extend axially into the chambers 110 and are connected to the piston 2.

[0032] Locking and releasing mechanism 4, which is linked to each pull rod 3, is used to simultaneously lock all piston 2 positions in a first state, and to selectively release a single pull rod 3 in a second state.

[0033] A set of water inlets 10 are provided on the side wall of the cylinder 1, and each water inlet 10 is connected to a corresponding chamber 110.

[0034] Based on the above structure, the principle of the water sampling device is as follows: First, the sampling device is immersed in the water area to be sampled. In the initial state, all pistons 2 are locked by the locking and releasing mechanism 4, i.e., the first state. At this time, the chamber 110 is closed, and all water inlets 10 do not enter water because the pistons 2 are closed. Next, according to the requirements, the corresponding pull rods 3 are released individually by the locking and releasing mechanism 4 at different depths of the water area to be sampled. Since the pistons 2 are sealed and floating in the chamber 110, the corresponding pistons 2 rise to draw water, while the other pistons 2 remain stationary, i.e., the second state. After the chamber 110 is completely filled with water sample, the sampling work is completed. A set of chambers 110 are evenly distributed around the circumference of the cylinder 1. With the pistons 2 and the locking and releasing mechanism 4, water samples at different depths can be collected in one lowering of the device, improving sampling efficiency. Moreover, each chamber 110 is independent of each other to prevent water sample mixing and ensure the purity of the water sample, thereby improving the accuracy of subsequent detection. There are 3 chambers 110 in a set, and correspondingly, there are 3 pistons 2 and 3 connecting rods 3 in a set, and 3 inlets 10 in a set.

[0035] In this embodiment, as Figure 4 As shown, the upper end of the cylinder 1 is provided with a cover plate 14, which seals the cylinder 1. The piston 2 is provided with a guide rod 5 on the side away from the pull rod 3. The end of the guide rod 5 away from the piston 2 extends axially out of the outer side of the cover plate 14. An elastic element 6 is sleeved on the outer side of the guide rod 5. The two ends of the elastic element 6 are respectively connected to the cover plate 14 and the piston 2. The cover plate 14 is sealed to the cylinder 1, forming a closed space at the top of the upper cavity 11, preventing water from seeping into the upper end of the cylinder 1 during sampling and avoiding contamination of the sample by external impurities. In the initial state, the elastic element 6 is in a stretched state, and the piston 2 is located at the bottom of the cavity 110. When sampling is required, the locking release mechanism 4 releases the pull rod 3, the elastic element 6 resets, and the piston 2 completes the water suction action under the drive of the elastic element 6. When it is necessary to empty the water sample in the cavity 110, the water sample in the cavity 110 can be discharged by pressing down the guide rod 5. The guide rod 5 ensures that the piston 2 moves along the axis of the cylinder 1, avoiding the piston 2 tilting and causing sealing failure or jamming. The elastic element 6 is a spring.

[0036] In this embodiment, a first sealing element 7 is provided between the cover plate 14 and the guide rod 5. The first sealing element 7 is installed at the through hole through which the guide rod 5 passes through the cover plate 14. The first sealing element 7 fills the gap between the guide rod 5 and the through hole of the cover plate 14 to prevent water, air, sediment, etc. from entering the cylinder 1 from the exit point of the guide rod 5 during sampling, thus preventing damage to the inside of the sampling device. The first sealing element 7 is an O-ring.

[0037] In this embodiment, the piston 2 is provided with a groove 20, which is arranged along the circumference of the piston 2. A second sealing element 8 is provided inside the groove 20. The second sealing element 8 is installed inside the circumferential groove 20 of the piston 2 and fits tightly against the inner wall of the chamber 110 to form an annular sealing band, preventing water or air from leaking through the gap between the piston 2 and the chamber 110 during the movement of the piston 2. The second sealing element 8 is a rubber sealing ring.

[0038] In this embodiment, a set of connecting pipes is provided in the lower cavity 12. The two ends of the connecting pipes are connected to the inlet 10 and the chamber 110, respectively. A one-way valve 9 is provided on the connecting pipe. The one-way valve 9 is used to allow water samples to enter the chamber 110 and prevent backflow. During sampling, the piston 2 moves upward, creating a negative pressure in the chamber 110. The one-way valve 9 opens, and the water sample is drawn into the chamber 110 through the inlet 10 and the connecting pipes. After the piston 2 stops moving, the one-way valve 9 closes to prevent water sample loss. There are three connecting pipes in the set, and correspondingly, there are also three one-way valves 9.

[0039] In this embodiment, the bottom of the cylinder 1 is provided with a bottom plate 15, which is sealed and installed at the bottom of the cylinder 1. The locking and releasing mechanism 4 includes: a drive motor 41, which is located in the lower cavity 12 and is mounted on the bottom plate 15; a turntable 42, which is mounted on the rotating end of the drive motor 41. Each pull rod 3 is provided with a locking block 31 near the end of the turntable 42. The turntable 42 is provided with a notch 420 that matches the shape of the locking block 31. When the locking and releasing mechanism 4 is in the locked state, the locking block 31 is located at the lower end of the turntable 42, and the locking block 31 and the turntable 42 abut against each other in the axial direction of the cylinder 1. When the drive motor 41 drives the turntable 42 to rotate by a preset angle, the notch 420 aligns with the locking block 31, so that the pull rod 3 gains axial freedom. With the drive motor 41 not powered, the turntable 42 is stationary at its initial angle. At this time, all the locking blocks 31 of the pull rods 3 are located at the lower edge of the turntable 42 and are not aligned with the notch 420 on the turntable 42. The upper surface of the locking block 31 is in axial contact with the lower end face of the turntable 42, forming a mechanical block. Since the turntable 42 is stationary, the locking block 31 cannot move upward, thus limiting the piston 2. When the turntable 42 rotates, when the notch 420 is fully aligned with the locking block 31, the locking block 31 loses the axial blockage of the turntable 42, and the pull rods... 3. Obtaining the upward or downward motion freedom, the piston 2 is reset, completing the water suction action; after completing the sampling, emptying or cleaning of a single chamber 110, the piston 2 is adjusted to the target position through the guide rod 5, and the drive motor 41 is started to drive the turntable 42 to rotate. When the notch 420 is aligned with the locking block 31, the locking block 31 passes through the notch 420 to the lower end of the turntable 42, and the turntable 42 continues to rotate, returning to the initial locking position. The lower end face of the turntable 42 abuts against the upper surface of all the locking blocks 31 again, forming an axial block.

[0040] In this embodiment, as Figure 5 As shown, the turntable 42 has an annular groove 421 on the side near the drive motor 41, and the locking block 31 has a roller 311 corresponding to the annular groove 421. The annular groove 421 is used to accommodate the roller 311. When the turntable 42 rotates, the roller 311 rolls within the notch 420. The roller 311 installed on the locking block 31 cooperates with the annular groove 421 on the motor side of the turntable 42, so that the axial sliding friction between the locking block 31 and the turntable 42 is converted into the rolling of the roller 311, reducing the mechanical wear of various components and improving the service life. In addition, the annular groove 421 provides radial limit for the roller 311, ensuring that the locking block 31 will not be circumferentially offset when moving axially, and avoiding the roller 311 from getting stuck with the edge of the turntable 42 due to offset. The notch 420 is opened around the periphery of the turntable 42, and the annular groove 421 is an annular track on the side of the turntable 42 near the drive motor 41. The roller 311 is simultaneously embedded in the annular groove 421 and is released from the constraint when the turntable 42 rotates to the position of the notch 420.

[0041] This embodiment also includes a lifting mechanism and a lifting ring 16. The lifting mechanism includes a lifting rope 17 with graduations evenly distributed along its length. These graduations indicate the lowering depth of the rope. The rope 17 is threaded onto the lifting ring 16, which is detachably mounted on the cover plate 14. The lifting mechanism controls the lowering depth of the sampling device, enables accurate sampling, and ensures operational safety and convenience. The evenly distributed graduations along the rope 17 allow operators to visually read the lowering depth of the device by observing the graduations on the water surface. Furthermore, during lowering, the depth can be adjusted in real-time by pulling or releasing the rope 17, in conjunction with the graduations, to meet the sampling needs at different depths. The detachable lifting ring 16 allows for quick removal of the ring when the rope 17 needs to be replaced or the device needs maintenance, without requiring complete disassembly of the cover plate 14 or the cylinder 1. The lifting mechanism also includes a reel, with one end of the lifting rope 17 wound around the reel.

[0042] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of this utility model without creative effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A water quality sampling device, characterized in that: include: The cylindrical body (1) includes, from top to bottom, an upper cavity (11) and a lower cavity (12). A partition (13) is provided between the upper cavity (11) and the lower cavity (12). The upper cavity (11) includes a set of chambers (110). The set of chambers (110) are evenly distributed along the circumference of the cylindrical body (1). A set of pistons (2), each set of pistons (2) is respectively sealed and floating in the chamber (110); A set of pull rods (3) are provided in the lower cavity (12). The set of pull rods (3) are provided in a one-to-one correspondence with a set of chambers (110). The pull rods (3) extend axially into the chambers (110) and are connected to the piston (2). Locking release mechanism (4), which is linked to each pull rod (3) to simultaneously lock the first state of all piston (2) positions and to selectively release a single pull rod (3); A set of water inlets (10) are provided on the side wall of the cylinder (1), and each water inlet (10) is connected to a corresponding chamber (110).

2. The water quality sampling device according to claim 1, characterized in that: The upper end of the cylinder (1) is provided with a cover plate (14), which is sealed on the cylinder (1). The piston (2) is provided with a guide rod (5) on the side away from the pull rod (3). The end of the guide rod (5) away from the piston (2) extends axially out of the outer side of the cover plate (14). An elastic element (6) is sleeved on the outer side of the guide rod (5). The two ends of the elastic element (6) are connected to the cover plate (14) and the piston (2) respectively.

3. The water quality sampling device according to claim 2, characterized in that: A first sealing element (7) is provided between the cover plate (14) and the guide rod (5), and the first sealing element (7) is installed at the through hole through which the guide rod (5) passes through the cover plate (14).

4. A water quality sampling device according to claim 1, characterized in that: The piston (2) is provided with a groove (20), which is arranged along the circumference of the piston (2), and a second seal (8) is provided in the groove (20).

5. A water quality sampling device according to claim 1, characterized in that: The lower cavity (12) is provided with a set of connecting pipes. The two ends of the connecting pipes are connected to the water inlet (10) and the chamber (110) respectively. The connecting pipes are provided with a one-way valve (9). The one-way valve (9) is used for water samples to enter the chamber (110) and to prevent backflow.

6. A water quality sampling device according to claim 1, characterized in that: The bottom of the cylinder (1) is provided with a bottom plate (15), the bottom plate (15) is sealed and installed at the bottom of the cylinder (1), and the locking and releasing mechanism (4) includes: A drive motor (41) is located in the lower cavity (12) and is mounted on the base plate (15); Turntable (42) is mounted on the rotating end of drive motor (41). Each pull rod (3) is provided with a locking block (31) near the turntable (42). The turntable (42) is provided with a notch (420) that is adapted to the shape of the locking block (31). When the locking release mechanism (4) is in the locked state, the locking block (31) is located at the lower end of the turntable (42). The locking block (31) and the turntable (42) abut against each other in the axial direction of the cylinder (1). When the drive motor (41) drives the turntable (42) to rotate at a preset angle, the notch (420) aligns with the locking block (31), so that the pull rod (3) gains axial freedom.

7. A water quality sampling device according to claim 6, characterized in that: The turntable (42) has an annular groove (421) on the side near the drive motor (41). The locking block (31) has a roller (311) corresponding to the annular groove (421). The annular groove (421) is used to accommodate the roller (311). When the turntable (42) rotates, the roller (311) rolls in the notch (420).

8. A water quality sampling device according to claim 2, characterized in that: Also includes: The lifting mechanism includes a lifting rope (17), which is provided with scale marks. The scale marks are evenly distributed along the length of the lifting rope (17) and are used to indicate the lowering depth of the lifting rope (17). The lifting rope (17) is threaded through the lifting ring (16), and the lifting ring (16) is detachably installed on the cover plate (14).

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