Underwater multi-bottle water sampling device and sampling method thereof

Abstract

The application relates to the field of water quality detection, and particularly discloses an underwater multi-bottle water sampling device and a sampling method thereof. The device comprises a driving structure, a flow dividing structure and a sampling structure. The driving structure provides power for the flow dividing structure, and the flow dividing structure delivers water samples to the sampling structure. The sampling structure comprises multiple sampling parts. The flow dividing structure is connected with the water inlets of the multiple sampling parts. Each sampling part comprises a piston and a sampling wall. The sampling wall is in the shape of a pipeline. The piston is movably arranged between the sampling walls. Airtight sampling cavities are formed between the piston, the sampling wall and the water inlets of the sampling parts. The multiple sampling parts can achieve the effect of multi-point sampling at one time. The piston of the sampling part solves the problem of the change of the buoyancy before and after water sampling, and is more convenient.

Description

Technical Field

[0001] This invention relates to the field of water quality testing, specifically to an underwater multi-bottle water sampling device and its sampling method. Background Technology

[0002] Currently, water source condition monitoring is typically conducted through water sampling, which is primarily done manually. If the water source is deep, manual or equipment-assisted diving is required. Manual diving carries numerous uncertainties and risks, compromising personnel safety. Existing diving equipment is bulky, requires excessive energy to operate, and can only collect one type of water sample per dive, leading to unnecessary resource waste and making it unsuitable for monitoring small to medium-sized bodies of water. Furthermore, during operation, existing equipment requires either increased buoyancy or jettisoning to balance buoyancy after sampling, to prevent the equipment from sinking due to added weight. Increasing buoyancy is challenging in design and manufacturing, generally increasing the equipment's size; while jettisoning is simpler, it often uses lead, resulting in high heavy metal content and potential secondary pollution of the water source. Therefore, designing an underwater sampling device capable of collecting water samples from multiple locations while maintaining buoyancy balance remains a pressing issue. Summary of the Invention

[0003] This invention discloses an underwater multi-bottle water sampling device and its sampling method, which can achieve multi-point sampling in one descent, avoid the risk of mixing between water samples, and solve various problems caused by changes in buoyancy before and after sampling.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] An underwater multi-bottle water sampling device includes: a driving structure, a diversion structure, and a sampling structure, wherein the driving structure provides power to the diversion structure, and the diversion structure delivers water samples to the sampling structure.

[0006] The sampling structure includes multiple sampling sections, and the diversion structure is connected to the inlets of the multiple sampling sections respectively. Each sampling section includes a piston and a sampling wall. The sampling wall is in the shape of a pipe, and the piston is movably disposed between the sampling walls. A closed sampling cavity is formed between the piston, the sampling wall and the inlet of the sampling section.

[0007] Optionally, the diversion structure includes a plunger pump, a diversion plate, and a rotating plate. The rotating plate connects the drive structure and the plunger pump, and a plunger pump chamber is formed between the plunger pump and the diversion plate. The plunger pump chamber is provided with an external water inlet for collecting external water samples. The plunger pump chamber is also connected to the water inlet of the diversion plate.

[0008] Optionally, the diversion plate is disc-shaped and includes a diversion inlet and multiple diversion outlets. The multiple diversion outlets are connected to the inlets of the multiple sampling units in a one-to-one correspondence, and the diversion inlet and the multiple diversion outlets are connected by multiple flow channels.

[0009] Optionally, the flow divider is also provided with a check valve and a solenoid valve;

[0010] The one-way valve is located at the external water inlet, and the solenoid valve corresponds to the plurality of sampling units and is used to control the switching of the plurality of sampling units.

[0011] Optionally, the flow divider also includes an overflow valve connected to the plunger pump chamber.

[0012] Optionally, the drive structure includes a motor that drives the rotating disk to rotate.

[0013] Optionally, the motor is provided with a pressure-resistant chamber for protecting the motor.

[0014] A sampling method for the aforementioned underwater multi-bottle water sampling device, the sampling method comprising:

[0015] The underwater multi-bottle water sampling device is deployed to the first water sampling position, and the motor drives the rotating disk to rotate.

[0016] The rotation of the rotating disk drives the plunger pump to move to the left, and the external water sample enters the plunger pump chamber through the one-way valve.

[0017] The rotation of the rotating disk drives the plunger pump to move to the right, and the solenoid valve opens the switch of the corresponding water inlet of the water intake section, so that the water sample enters the corresponding water intake section.

[0018] The underwater multi-bottle water sampling device was deployed to the second water sampling position, and the above steps were repeated.

[0019] Optionally, during the process of the water sample entering the corresponding water intake section:

[0020] After the water sample enters the corresponding water intake section, it pushes the piston to move to the right, and the external water sample on the right side of the piston is pushed out of the water intake section, achieving pressure balance inside and outside.

[0021] Optionally, the sampling method further includes:

[0022] Excess water sample in the plunger pump chamber is discharged from the underwater multi-bottle water sampling device through the overflow valve.

[0023] The beneficial effects of this invention are:

[0024] (1) Under the action of the diversion structure, the device of this application can allow water samples from different locations to enter different sampling sections, thereby achieving the effect of taking multiple water samples in one water drop process, and ensuring that water samples from different locations are stored in different sampling sections to prevent pollution and interference between different water samples.

[0025] (2) The bottom of the sampling section in this application is not closed, and a piston is installed inside the sampling section. As the collected water sample enters, the external water sample inside the sampling section is discharged, ensuring that the buoyancy of the sampling section after collecting the water sample is the same as the buoyancy before collecting the water sample, thus avoiding problems caused by the change of buoyancy during the water descent.

[0026] (3) This application integrates the diversion structure to make the whole device small in size and light in weight, easy to launch into water, and adaptable to working in various water areas such as fresh water and seawater. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the underwater multi-bottle water sampling device provided in an embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional view of the underwater multi-bottle water sampling device provided in an embodiment of the present invention;

[0029] Figure 3 This is a side view of the underwater multi-bottle water sampling device provided in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the water intake method provided in an embodiment of the present invention.

[0031] Figure label:

[0032] 10-Drive structure; 20-Diverter structure; 30-Sampling structure; 1-Pressure chamber; 2-Motor; 3-Rotating disc; 4-Plunger pump; 5-Solenoid valve; 6-Diverter disc; 7-Check valve; 8-Sampling section; 9-Piston; 11-Sampling wall. Detailed Implementation

[0033] 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.

[0034] This application proposes an underwater multi-bottle water sampling device for collecting water samples from multiple locations during a single descent. Figure 1As shown, the device includes a drive structure 10, a diversion structure 20, and a sampling structure 30. The drive structure 10 provides power to the diversion structure 20 to ensure that the diversion structure 20 can collect water samples and collect them into the sampling structure 30. The diversion structure 20 is used to collect water samples and transport them to the corresponding sampling structure 30. The sampling structure 30 is used to store water samples from different underwater locations to prevent accidents such as mixing between different water samples, which could adversely affect the experimental results.

[0035] Specifically, in order to ensure that water samples from different locations do not mix after being collected, the sampling structure 30 includes multiple sampling sections 8, which are not interconnected, and the diversion structure 20 connects to the inlet of each sampling section 8, so that the water sample can be transported from the diversion structure 20 to the designated sampling section 8.

[0036] like Figures 2 to 3 As shown, each sampling section 8 consists of a piston 9 and a sampling wall 11. The sampling wall 11 is pipe-shaped, and its bottom is not closed. For example, in this application, the sampling wall 11 is cylindrical. The piston 9 is movably disposed between the sampling walls 11, and the shape of the piston 9 should be consistent with the shape of the pipe to ensure that a sealed sampling chamber is formed between the piston 9, the sampling wall 11, and the water inlet of the sampling section 8. When the water sample enters the sampling chamber from the diversion structure 20, the piston 9 is pushed to the right under pressure to reserve space for the water sample collected on the left side, while the external water sample on the right side is pushed out of the device to ensure that the buoyancy of the device remains unchanged before and after collecting the water sample.

[0037] Specifically, the diversion structure 20 includes a plunger pump 4, a diversion disk 6, and a rotating disk 3. One side of the rotating disk 3 is connected to a drive structure 10, which provides power to rotate it; the other side is connected to the plunger pump 4. As the rotating disk 3 rotates, the plunger pump 4 moves left or right in a straight line. A plunger pump chamber is formed between the plunger pump 4 and the diversion disk 6, which connects to the diversion inlet of the diversion disk 6 and an external inlet. As the plunger pump 4 moves, the pressure inside the plunger pump chamber changes, causing the water sample to enter the plunger pump chamber through the external inlet. For example, as the plunger pump 4 moves to the left, the pressure inside the plunger pump chamber decreases, and the external water sample enters the plunger pump chamber due to pressure; while as the plunger pump 4 moves to the right, the pressure inside the plunger pump chamber increases, and the water sample in the plunger pump chamber enters the diversion disk 6 through the diversion inlet of the diversion disk 6.

[0038] Specifically, the diversion plate 6 is disc-shaped and includes a diversion inlet connected to the plunger pump chamber, as well as multiple diversion outlets. The diversion inlet and different diversion outlets are connected by different flow channels, so that the water sample can be transported to each diversion outlet through the flow channels. Each diversion outlet and each sampling unit inlet are connected in a one-to-one correspondence, and the water sample should be transported to which sampling unit based on the actual situation.

[0039] In addition, the diversion plate 6 is equipped with a one-way valve 7 and a solenoid valve 5. The one-way valve 7 is located at the external water inlet, ensuring that water samples can only enter the device from the outside through the external water inlet and cannot be discharged from the outside through the external water inlet. This also ensures that when the plunger pump 4 moves to the right, the water sample in the plunger pump chamber will not be discharged from the device through the external water inlet under pressure, but will only enter the sampling section through the diversion plate 6. The solenoid valve 5 corresponds to multiple sampling sections 8. When the water sample enters the diversion plate 6, the solenoid valve 5 controls the piston 9 of the corresponding sampling section 8 to move to the right, while the piston 9 of other sampling sections 8 remains in the same position, thus allowing the water sample to smoothly enter the corresponding sampling section 8 for storage.

[0040] In addition to the one-way valve 7 and the solenoid valve 5, the diversion plate 6 of this application also includes an overflow valve. The overflow valve is connected to the plunger pump chamber. When the water sample collection is completed, if the volume that the sampling section 8 can store is full, and there is still water sample remaining in the plunger pump chamber, the remaining water sample can be discharged through the overflow valve by operating the overflow valve, thereby ensuring that the water sample collected at the next position will not mix with the remaining water sample at the previous position, and ensuring the accuracy of the data.

[0041] Specifically, the drive structure 10 includes a motor 2 and electrical components such as a controller. The motor 2 drives the rotating disk 3, thereby causing the rotating disk 3 to rotate. The controller can control the solenoid valve 5, the overflow valve, and the overall device. To protect the motor 2 and electrical components, a pressure-resistant chamber 1 is provided outside the motor 2 to prevent damage to the motor 2 and electrical components due to water ingress during underwater operations, or damage due to excessive pressure during operations in deep water areas.

[0042] This application also proposes a sampling method based on the above-mentioned underwater multi-bottle water sampling device, such as... Figure 4 As shown, the sampling method includes:

[0043] S1: The underwater multi-bottle water sampling device is deployed to the first water sampling position, and the motor 2 drives the rotating disk 3 to rotate.

[0044] S2: Rotating disk 3 drives plunger pump 4 to move to the left, and external water sample enters the plunger pump chamber through one-way valve 7;

[0045] S3: Rotating disk 3 drives plunger pump 4 to move to the right, solenoid valve 5 pushes piston 9 of corresponding water intake section 8 to the right, and water sample enters the corresponding water intake section;

[0046] S4: The underwater multi-bottle water sampling device is deployed to the second water sampling position, and the above steps are repeated.

[0047] It should be noted that if the water sample volume in the plunger pump chamber does not reach the collection volume of the sampling section 8, the plunger pump 4 will repeatedly perform the extraction and injection steps until the collection volume of the sampling section reaches the standard. Once the collection is confirmed to be complete, the solenoid valve 5 closes again, the overflow valve discharges the remaining water sample in the plunger pump chamber, and the underwater multi-bottle water sampling device proceeds to the next sampling point.

[0048] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the invention. Therefore, if these modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A sampling method for an underwater multi-bottle water sampling device, characterized in that, The underwater multi-bottle water sampling device includes: a driving structure, a diversion structure, and a sampling structure. The driving structure provides power to the diversion structure, and the diversion structure delivers water samples to the sampling structure. The bottom of the sampling structure is an open structure, comprising multiple sampling sections. A diversion structure connects to the inlets of each sampling section. The diversion structure includes a plunger pump, a diversion plate, and a rotating plate. The rotating plate connects to a drive structure and the plunger pump, and a plunger pump chamber is formed between the plunger pump and the diversion plate. The plunger pump chamber has an external inlet for collecting external water samples. The plunger pump chamber is also connected to the inlet of the diversion plate. A one-way valve and a solenoid valve are also provided on the diversion plate. The one-way valve is located at the external inlet, and the solenoid valve corresponds to each sampling section and is used to control the sampling sections. The sampling unit features piston movement; the driving structure includes a motor that drives a rotating disk to rotate, and a pressure-resistant chamber is provided outside the motor to protect it. Each sampling unit includes a piston and a sampling wall, the sampling wall being pipe-shaped. The piston is movably disposed between the sampling walls, and a sealed sampling chamber is formed between the piston, the sampling wall, and the water inlet of the sampling unit. When the water sample enters the sampling unit from the diversion structure, the piston moves under pressure to discharge the external water sample located at the bottom of the sampling structure, ensuring that the buoyancy remains unchanged before and after the device collects the water sample. The sampling method of this underwater multi-bottle water sampling device includes: The underwater multi-bottle water sampling device is deployed to the first water sampling position, and the motor drives the rotating disk to rotate. The rotation of the rotating disk drives the plunger pump to move to the left, and the external water sample enters the plunger pump chamber through the one-way valve. The rotation of the rotating disk drives the plunger pump to move to the right, the solenoid valve pushes the piston of the corresponding sampling section to the right, the water sample enters the corresponding sampling section, and after the water sample enters the corresponding sampling section, it pushes the piston to move to the right, and the external water sample on the right side of the piston is pushed out of the sampling section, achieving gravity buoyancy balance; The underwater multi-bottle water sampling device was deployed to the second water sampling position, and the above steps were repeated.

2. The sampling method according to claim 1, characterized in that, The diversion plate is disc-shaped and includes a diversion inlet and multiple diversion outlets. The multiple diversion outlets are connected to the inlets of the multiple sampling units one by one, and the diversion inlet and the multiple diversion outlets are connected by multiple flow channels.

3. The sampling method according to claim 2, characterized in that, The flow divider also includes an overflow valve, which is connected to the plunger pump chamber.

4. The sampling method according to claim 3, characterized in that, The sampling method further includes: Excess water sample in the plunger pump chamber is discharged from the underwater multi-bottle water sampling device through an overflow valve.

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