Water quality sampling device

Abstract

The invention provides a water quality sampling device which comprises a sampling unit, the sampling unit comprises an end cover and a sampling barrel, a swelling cavity and a sliding cavity are sequentially formed in the end cover from top to bottom, the swelling cavity and the sliding cavity are separated through an elastic diaphragm or a sliding diaphragm, and the upper end of the sampling barrel is arranged in the sliding cavity; an elastic assembly used for supporting the sampling barrel is arranged in the sliding cavity, a water taking opening is formed in the sampling barrel in the sliding cavity, a water swelling material is placed in the swelling cavity, the swelling cavity is connected with the water inlet assembly, after the sampling barrel is conveyed to the set water depth, a water inlet of the water inlet assembly is formed below the water surface, water enters the swelling cavity through the water inlet, and the water taking opening is formed in the sampling barrel. The water swelling material expands in volume when encountering water, the sampling barrel is pushed to move downwards along the sliding cavity, and the water intake is moved out of the sliding cavity. The sampling depth is not limited, the structure is simple, the equipment cost is low, the operation is more flexible and convenient, the number and spacing of the sampling units can be set as required, and multi-layer water sampling is facilitated.

Description

Technical Field

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

[0002] To strengthen water quality monitoring and promptly grasp water quality conditions, especially for rivers and lakes, it is necessary to sample and test water at different depths. However, some sampling devices require personnel to dive to a set depth, which is inconvenient for sampling. Other sampling devices can only collect water from the surface, such as bottom-entry sampling tubes, which start collecting water as soon as they enter the water and cannot collect water samples only from a set depth.

[0003] Patent document CN102353558B discloses a sampling device for determining water depth and quality. The device involves adjusting the length of a hollow rod to match the required water depth, from the scale markings on the outer wall of the bucket to the bottom of the rod. The device is then placed in the water body using a handle and lowered until the water surface is aligned with the scale markings on the outer wall of the bucket for sampling. However, if the water depth is deep, a longer hollow rod is required, limiting the sampling depth. This method is suitable for shallow water sampling and only allows sampling from one depth at a time, preventing simultaneous sampling at different depths.

[0004] Patent document CN116183307B discloses a multi-layer continuous water quality sampling device and its sampling method, including an outer cylinder, a sliding cylinder provided inside the outer cylinder, a sampling cylinder slidably connected inside the sliding cylinder, and multiple sampling cylinders. The relative movement of the sliding cylinder and the sampling cylinder is controlled by a motor, a first cylinder and other equipment to complete the sampling. The overall equipment cost is high, and the sampling depth and the interval between different sampling depths are fixed, which is not convenient to adjust as needed. Summary of the Invention

[0005] This invention proposes a water quality sampling device. The sampling unit introduces water into the swelling chamber through the water inlet of the water inlet component. After the water-swelling material expands upon contact with water, it pushes the sampling cylinder downward to obtain a water sample at the required depth. The device has a simple structure, low equipment cost, and is more flexible and convenient to operate. The number and spacing of the sampling units can be set as needed to facilitate multi-layer water quality sampling.

[0006] The technical solution of the present invention is implemented as follows: A water quality sampling device includes a sampling unit, which includes an end cap and a sampling tube. A swelling chamber and a sliding chamber are arranged sequentially from top to bottom inside the end cap. The swelling chamber and the sliding chamber are separated by an elastic diaphragm or a sliding diaphragm. The upper end of the sampling tube is placed in the sliding chamber. An elastic component for supporting the sampling tube is provided in the sliding chamber. A water inlet is provided on the sampling tube in the sliding chamber. A water-swellable material is placed in the swelling chamber. The swelling chamber is connected to a water inlet component. After the sampling tube is sent to a set water depth, the water inlet of the water inlet component is placed below the water surface. Water enters the swelling chamber through the water inlet. The water-swellable material expands in volume when it comes into contact with water, pushing the sampling tube down along the sliding chamber. The water inlet moves to the outside of the sliding chamber.

[0007] Furthermore, the sampling unit comprises multiple units, which are vertically connected in sequence. Adjacent sampling units are connected by adjustable-length connectors, and the swelling chambers of each sampling unit are connected to the same injection assembly. This facilitates multi-layer water quality sampling, and the sampling depth can be adjusted as needed.

[0008] Furthermore, the water intake is a circular hole, with a vertical mesh frame inside. A floating ball is placed inside the mesh frame, and an arc-shaped plate is attached to the upper end of the frame. The upper end of the arc-shaped plate is hinged to the top of the intake, and an inclined plate is tangentially attached to the lower end of the plate. The inclined plate abuts against the end of the mesh frame furthest from the intake. The arc-shaped plate has a radius equal to the diameter of the floating ball and centered at the lowest point of the intake. This structure automatically seals the intake after water sampling.

[0009] Furthermore, the water inlet assembly includes a water inlet pipe, the upper end of which is the water inlet, and branch pipes are provided on the water inlet pipe, with each branch pipe corresponding to a swelling chamber.

[0010] Furthermore, the inlet pipe is a vertical single pipe with a sealed end at the bottom. The sealed end prevents deep water from entering the inlet pipe and interfering with sampling.

[0011] Furthermore, the inlet pipe is a vertical U-shaped pipe with the U-shaped pipe facing upwards. One end of the U-shaped pipe is the water inlet, and the other end is the vent. The water inlet is located below the water surface, while the vent is located above the water surface. The vent facilitates the rapid discharge of gas from the inlet pipe, while the vent's location above the water surface prevents gas from entering deeper water and interfering with sampling.

[0012] Furthermore, the inlet pipe is a flexible inlet hose, and a traction rope is installed on the end cap of the uppermost sampling unit. An adjustable support rod is attached to the traction rope and connected to the upper end of the inlet pipe. Using a flexible inlet hose reduces interference from the length of the inlet pipe when adjusting water depth sampling intervals.

[0013] Furthermore, a limiting plate is fixed at the upper end of the sampling tube, and the elastic component is a support spring located in the swelling cavity below the limiting plate.

[0014] Furthermore, a first magnet is fixed at the bottom of the swelling chamber, and a second magnet is fixed at the lower end of the limiting plate. After the sampling cylinder moves down, the first magnet and the second magnet attract each other magnetically.

[0015] Furthermore, the swelling chamber is equipped with an openable cover plate, which facilitates the replacement of water-swellable materials and makes the sampling device reusable; a water outlet valve is provided at the bottom of the sampling cylinder.

[0016] The beneficial effects of this invention are: The water sampling device of this invention lowers the sampling cylinder to the sampling depth, and then water is introduced into the swelling chamber through the water inlet of the water inlet component. The water-receiving swelling material expands upon contact with water, pushing the sampling cylinder downwards to obtain a water sample at the desired depth. The device has a simple structure, low equipment cost, and no limitation on sampling depth. An elastic diaphragm and a sliding diaphragm separate the swelling chamber and the sliding chamber, preventing water from the water inlet component from entering the sliding chamber and contaminating the sample.

[0017] The water sampling device of the present invention can perform multi-layer water sampling by connecting multiple sampling units in series. The interval between different sampling layers can also be adjusted as needed. The number of sampling units can be increased or decreased according to the number of sampling layers, making the operation more flexible and convenient.

[0018] The present invention provides a water guide pipe and a floating ball inside the water intake. Through the cooperation of the water guide pipe and the floating ball, the water intake can be automatically closed after sampling is completed, so as to avoid the water in the sampling tube from exchanging with the external water during the upward movement of the sampling tube. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the internal structure of Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the present invention; Figure 5 This is a schematic diagram of the structure of Embodiment 3 of the present invention.

[0021] Sampling unit 1, end cap 2, sampling cylinder 3, swelling chamber 4, sliding chamber 5, diaphragm 6, elastic component 7, limiting plate 8, water inlet 9, water-swellable material 10, cover plate 11, water inlet pipe 12, water inlet 13, branch pipe 14, traction rope 15, support rod 16, connector 17, U-shaped tube 18, vent 19, first magnet 20, second magnet 21, vertical mesh frame 22, arc plate 23, inclined plate 24, floating ball 25. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1 like Figure 1-2 As shown, a water quality sampling device includes a sampling unit 1, which includes an end cap 2 and a sampling cylinder 3. The end cap 2 has a swelling chamber 4 and a sliding chamber 5 arranged sequentially from top to bottom. The swelling chamber 4 and the sliding chamber 5 are separated by a diaphragm 6. The diaphragm 6 can be an elastic diaphragm or a sliding diaphragm, etc. The elastic diaphragm is a waterproof rubber membrane, etc. The elastic diaphragm 6 is fixed inside the end cap 2. The sliding diaphragm 6 is a sliding plate placed inside the end cap 2. The sliding plate slides in a sealed manner within the end cap 2, making the volumes of the swelling chamber 4 and the sliding chamber 5 adjustable. When the volume of the swelling chamber 4 increases, the volume of the sliding chamber 5 decreases.

[0024] A through hole is provided at the lower end of the sliding cavity 5, and a sealing ring is fixed at the through hole. The upper end of the sampling cylinder 3 passes through the through hole and is placed inside the sliding cavity 5. An elastic component 7 for supporting the sampling cylinder 3 is provided inside the sliding cavity 5. A limit plate 8 is fixed at the upper end of the sampling cylinder 3. The elastic component 7 is a support spring and is located in the swelling cavity 4 below the limit plate 8. The support spring supports the sampling cylinder 3 and restricts the lower end of the sampling cylinder 3 from moving downward. A water inlet 9 is provided on the side wall of the sampling cylinder 3. The water inlet 9 is located in the sliding cavity 5 above the through hole. A water outlet valve is fixed at the bottom of the sampling cylinder 3 to facilitate the release of water from the sampling cylinder 3. Multiple water inlets 9 can be provided circumferentially as needed.

[0025] The swelling chamber 4 contains a water-swellable material 10, which can be made of compressed towels or similar materials. It swells rapidly upon contact with water, increasing its volume. The swelling chamber 4 is equipped with an openable cover plate 11. The cover plate 11 is threaded to the end cap 2, or one end of the cover plate 11 is hinged to the end cap 2 and the other end is snapped together, or other structures are also possible. The cover plate 11 can be opened to facilitate the replacement of the water-swellable material 10, thereby making the water quality sampling device reusable.

[0026] The swelling chamber 4 is connected to the water inlet assembly, which includes a water inlet pipe 12. The upper end of the water inlet pipe 12 is a water inlet 13, and a conical water inlet cover is fixed at the water inlet 13 to increase the water inlet area. At the same time, a filter screen is fixed on the water inlet cover to prevent the water inlet 13 from being blocked. A branch pipe 14 is provided on the water inlet pipe 12, and the branch pipe 14 is connected to the swelling chamber 4. The water inlet pipe 12 is a flexible water inlet hose and is a vertical single pipe. The lower end of the water inlet pipe 12 is a sealed end. The upper part of the flexible water inlet hose is relatively long and is wound up. Its length can be adjusted as needed to suit water quality sampling at different depths.

[0027] A traction rope 15 is connected to the end cap 2 of the sampling unit 1. A height-adjustable support rod 16 is connected to the traction rope 15 and is connected to the upper end of the water inlet pipe 12. Both ends of the support rod 16 are fixed with clamping seats. One end is clamped to the traction rope 15; to adjust the height of the support rod 16, simply loosen the clamping seat. The other end is clamped to the water inlet 13 of the water inlet pipe 12. Adjust the height of the support rod 16 according to the required water depth so that the water inlet 13 is slightly below the water surface, such as within 1 cm below the water surface. With this structure, when the sampling cylinder 3 is placed, the water inlet assembly is placed synchronously with the sampling cylinder 3. When the sampling cylinder 3 reaches the set water depth, the water inlet 13 of the water inlet assembly is just below the water surface.

[0028] The method of using the water sampling device includes the following steps: After the sampling tube 3 is sent to the set water depth, the water inlet 13 of the water inlet assembly is placed below the water surface. The water at the water surface enters the swelling chamber 4 through the water inlet 13. The water-swelling material 10 expands in volume when it comes into contact with water, pushing the sampling tube 3 to move down along the sliding chamber 5. The water inlet 9 moves to the lower side of the through hole, and the water at the sampling depth enters the sampling tube 3 through the water inlet 9.

[0029] Example 2 This embodiment is basically the same as Embodiment 1, except that: Figure 3 As shown, the sampling unit 1 includes multiple units, which are vertically connected in sequence. The end caps 2 of adjacent sampling units 1 are connected by an adjustable-length connector 17. The connector 17 can be a rope or an adjustable-length telescopic rod, which facilitates adjusting the spacing between adjacent sampling tubes 3 as needed, and is suitable for water quality sampling at different depth intervals. The connector 17 and the traction rope 15 can also be an integral structure, such as a single rope, on which a height-adjustable clamping ring is connected, and the clamping ring is correspondingly connected to the end cap 2 of the sampling unit 1.

[0030] Each sampling unit 1 has a swelling chamber 4 connected to the same injection assembly, i.e., the water inlet pipe 12 is connected to a branch pipe 14 corresponding to each swelling chamber 4, and the branch pipe 14 is connected to the corresponding swelling chamber 4. The water inlet pipe 12 is a flexible water inlet hose, and the spacing of the sampling units 1 can be adjusted within the interval of adjacent branch pipes 14 without being affected by the flexible water inlet hose.

[0031] When water samples need to be taken at different depths at the same location, the length of the connector 17 is adjusted according to the sampling interval requirements, and the end caps 2 of multiple sampling units 1 are vertically connected in series through the connector 17. The traction rope 15 is connected to the uppermost end cap 2. The height of the support rod 16 is adjusted according to the sampling depth requirements at the uppermost point. Then, multiple sampling units 1 are placed into the water in sequence through the traction rope 15. For deeper sampling depths, in order to ensure the accuracy of sampling, a counterweight can be suspended below the last sampling unit. The counterweight is connected to the end cap 2 of the last sampling unit 1 through a rope.

[0032] Example 3 This embodiment is basically the same as embodiment 1 or 2, except that: Figure 2 and 5 As shown, the water inlet 9 is a circular hole. A vertical mesh frame 22 is fixed inside the water inlet 9. A floating ball 25 is placed inside the vertical mesh frame 22. An arc plate 23 is provided at the upper end of the vertical mesh frame 22. The upper end of the arc plate 23 is hinged to the upper part of the water inlet 9. A limit block is fixed on the upper side of the hinge to limit the upward rotation angle of the arc plate 23 and prevent the floating ball from detaching from the upper end of the vertical mesh frame 22. A tilting plate 24 is tangentially connected to the lower end of the arc plate 23. The arc plate 23 and the tilting plate 24 are an integral structure. The tilting plate 24 abuts against the end of the vertical mesh frame 22 away from the water inlet 9. The arc plate 23 is centered at the lowest point A of the water inlet 9 and has a radius of the diameter of the floating ball 25.

[0033] Water enters the sampling cylinder 3 through the water intake 9. As the water level in the sampling cylinder 3 rises, the floating ball 25 moves upward along the vertical mesh frame 22 and then sequentially along the inclined plate 24 and the arc-shaped plate 23. Guided by the inclined plate 24 and the arc-shaped plate 23, a portion of the floating ball 25 enters the water intake 9, closing the water intake 9. After the water in the sampling cylinder 3 is discharged, it pushes the floating ball 25 inward through the water intake 9, causing it to detach from the water intake 9 and fall to the bottom of the vertical mesh frame 22.

[0034] Example 4 This embodiment is basically the same as embodiment 1 or 2, except that: Figure 4As shown, the water inlet pipe 12 is a vertical U-shaped pipe 18, with the U-shaped pipe 18 facing upwards. One end of the U-shaped pipe 18 is the water inlet 13, and the other end is the vent 19. The water inlet 13 is located below the water surface, and the vent 19 is located above the water surface. The U-shaped pipe 18 structure facilitates the rapid discharge of air from the water inlet pipe 12 through the vent 19, ensuring that water quickly enters the water inlet pipe 12. However, this increases the required length of the water inlet pipe 12. If the water inlet pipe 12 is a vertical single pipe, then the water inlet 13 is used for both water intake and air exhaust.

[0035] Example 5 This embodiment is basically the same as embodiment 1 or 2, except that: Figure 2 As shown, a first magnet 20 is fixed at the bottom of the swelling chamber 4, and a second magnet 21 is fixed at the lower end of the limiting plate 8. The water-swellable material 10 expands in volume when it comes into contact with water, pushing the sampling cylinder 3 to move down along the sliding chamber 5. After the sampling cylinder 3 moves down a certain distance, the first magnet 20 and the second magnet 21 attract each other magnetically, which further assists the sampling cylinder 3 to move down, ensuring that the water inlet 9 moves down to the lower side of the through hole.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A water quality sampling device, comprising a sampling unit, characterized in that: The sampling unit includes an end cap and a sampling tube. The end cap contains a swelling chamber and a sliding chamber arranged sequentially from top to bottom. The swelling chamber and the sliding chamber are separated by an elastic diaphragm or a sliding diaphragm. The upper end of the sampling tube is placed in the sliding chamber. An elastic component for supporting the sampling tube is provided in the sliding chamber. A water inlet is provided on the sampling tube in the sliding chamber. Water-swellable material is placed in the swelling chamber. The swelling chamber is connected to the water inlet component. After the sampling tube is sent to the set water depth, the water inlet of the water inlet component is placed below the water surface. Water enters the swelling chamber through the water inlet. The water-swellable material expands in volume when it comes into contact with water, pushing the sampling tube down along the sliding chamber. The water inlet moves to the outside of the sliding chamber.

2. The water quality sampling device according to claim 1, characterized in that: The sampling unit comprises multiple units, which are connected vertically in sequence. Adjacent sampling units are connected by adjustable-length connectors, and the swelling chamber of each sampling unit is connected to the same injection component.

3. A water quality sampling device according to claim 1 or 2, characterized in that: The water intake is a round hole. A vertical mesh frame is set inside the water intake, and a floating ball is placed inside the vertical mesh frame. An arc-shaped plate is set at the upper end of the vertical mesh frame. The upper end of the arc-shaped plate is hinged to the top of the water intake. An inclined plate is set tangent to the lower end of the arc-shaped plate. The inclined plate abuts against the end of the vertical mesh frame away from the water intake. The arc-shaped plate is centered at the lowest point of the water intake and has a radius of the diameter of the floating ball.

4. A water quality sampling device according to claim 1 or 2, characterized in that: The water inlet assembly includes a water inlet pipe, the upper end of which is the water inlet, and branch pipes are installed on the water inlet pipe, which are connected to the swelling chambers one by one.

5. A water quality sampling device according to claim 4, characterized in that: The water inlet pipe is a vertical single pipe, and the lower end of the water inlet pipe is a sealed end.

6. A water quality sampling device according to claim 4, characterized in that: The water inlet pipe is a vertical U-shaped pipe with the U-shaped pipe facing upwards. One end of the U-shaped pipe is the water inlet, and the other end is the air vent. The water inlet is located below the water surface, and the air vent is located above the water surface.

7. A water quality sampling device according to claim 4, characterized in that: The water inlet pipe is a flexible water inlet hose. A traction rope is installed on the end cap of the uppermost sampling unit. A height-adjustable support rod is installed on the traction rope, and the support rod is connected to the upper end of the water inlet pipe.

8. A water quality sampling device according to claim 1, characterized in that: A limiting plate is fixed at the upper end of the sampling tube, and the elastic component is a support spring located in the swelling cavity below the limiting plate.

9. A water quality sampling device according to claim 1, characterized in that: A first magnet is fixed at the bottom of the swelling chamber, and a second magnet is fixed at the lower end of the limiting plate. The first magnet and the second magnet are attracted to each other magnetically.

10. A water quality sampling device according to claim 1, characterized in that: The swelling chamber is equipped with an openable cover; the bottom of the sampling tube is equipped with a water outlet valve.

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