A multi-point water quality sampler and its sampling method

Abstract

This invention relates to the field of water sampling technology, specifically disclosing a multi-point water quality sampler and its sampling method. The multi-point water quality sampler includes a power mechanism, a sampling mechanism, and a storage mechanism. The power mechanism provides power to the sampling mechanism, and the storage mechanism stores the water sample taken by the sampling mechanism. The sampling mechanism includes a transmission component, a sampling piston, an external water inlet, and a sampling tube. The transmission component connects the power mechanism and the sampling piston, which is disposed inside the sampling tube. The bottom of the sampling tube is not closed. The transmission component drives the sampling piston to move within the sampling tube, and the top of the sampling tube is connected to the external water inlet. The storage mechanism includes multiple water storage bottles, and the sampling outlet is connected to the inlets of the multiple water storage bottles. This application uses the transmission component to drive the sampling piston, allowing external water samples to be rapidly drawn into the sampling tube under pressure difference. It also enables multiple sampling from a single water intake, ensuring that the buoyancy of the entire device remains constant before and after water sampling.

Description

Technical Field

[0001] This invention relates to the field of water sampling technology, specifically a multi-point water quality sampler and its sampling method. Background Technology

[0002] In order to better solve the problem of water pollution, in addition to treating sewage, it is also important to build a water sampling system using the latest technology. Real-time monitoring of water areas can prevent water disasters in time, and at the same time, it is of great significance to provide accurate and reliable data for scientifically and reliably ensuring water quality safety.

[0003] Current water quality sampling methods can be broadly categorized as follows:

[0004] (1) Bucket (bottle) method: Throw the bottle into the water, fill it with water sample, lift it up, and then test the water sample. However, the drawback is that the sampling depth is very limited and there is a carrying error.

[0005] (2) Vacuum sampling: The sampling bottle is pre-vacuumed and placed in the water. After reaching the water sampling point, the bottle mouth is opened and water is poured in by relying on the vacuum state inside the bottle. The disadvantages are that it is difficult to close the bottle mouth after it is opened, so water quality from other areas can easily mix into the bottle during the ascent, thus affecting the purity; the buoyancy changes significantly before and after water sampling, making it impossible to achieve a state of buoyancy balance; sampling can only be performed point-to-point, and multiple sampling points cannot be sampled at one time.

[0006] (3) Manual sampling: This method relies on divers carrying sampling bottles to dive and collect samples. Its disadvantages are that the diver's diving time and depth are relatively limited; the sampling bottle carried by the diver is initially empty and has a large buoyancy. After sampling, the entire device becomes negatively buoyant due to the entry of external water samples into the sampling bottle, which increases the diver's workload; and the personal safety of divers is at greater risk when sampling in complex waters.

[0007] In conclusion, how to design a simple and safe water sampling device that can achieve multiple samplings with a single descent and ensure that the buoyancy of the entire device remains unchanged before and after water sampling is still an urgent problem to be solved. Summary of the Invention

[0008] This invention discloses a multi-point water quality sampler and its sampling method, which can quickly draw external water samples into the sampling tube and can achieve multiple samplings in one descent, ensuring that the buoyancy of the entire device remains unchanged before and after water sampling.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A multi-point water quality sampler includes: a power mechanism, a sampling mechanism, and a storage mechanism, wherein the power mechanism provides power to the sampling mechanism, and the storage mechanism stores the water sample taken by the sampling mechanism;

[0011] The sampling mechanism includes a transmission component, a sampling piston, an external water inlet, and a sampling tube. The transmission component connects the power mechanism and the sampling piston. The sampling piston is disposed inside the sampling tube, and the bottom of the sampling tube is not closed. The transmission component drives the sampling piston to move inside the sampling tube. The external water inlet is arranged around the sampling tube, and the top of the sampling tube is connected to the external water inlet.

[0012] The storage mechanism includes multiple water storage bottles, and the outlet of the sampling mechanism is connected to the inlet of the multiple water storage bottles.

[0013] Optionally, the transmission component includes a threaded nut sleeve and a screw rod, the nut sleeve being connected to the power mechanism and rotating with the power mechanism, and the screw rod being connected to the sampling piston.

[0014] Optionally, the storage mechanism further includes a diversion plate, which is fixedly connected to the plurality of water storage bottles and is disc-shaped. The diversion plate includes a diversion inlet and a plurality of diversion outlets connected to the diversion inlet through multiple flow channels. The diversion inlet is connected to the outlet of the sampling tube, and the plurality of diversion outlets are respectively connected to the inlets of the plurality of water storage bottles.

[0015] Optionally, each of the plurality of water storage bottles is equipped with a solenoid valve at its inlet.

[0016] Optionally, a one-way valve is provided at the external water inlet.

[0017] Optionally, the water storage bottle includes a water storage tube and a water storage piston. The water storage piston is disposed inside the water storage tube, and the water storage piston and the water storage tube are in a sealed state, while the bottom of the water storage tube is not sealed.

[0018] Optionally, the power mechanism includes a motor that provides power to the transmission component.

[0019] Optionally, the power mechanism further includes a power compartment disposed outside the motor.

[0020] A sampling method for the aforementioned multi-point water quality sampler, characterized in that the sampling method includes:

[0021] The multi-point water quality sampler is deployed to the first sampling area, and the motor rotates forward, driving the nut sleeve to rotate forward.

[0022] The transmission component drives the sampling piston to move to the right, and the external water sample enters the sampling tube through the external water inlet;

[0023] When the motor reverses, the transmission component drives the nut sleeve to reverse, and the solenoid valve of the corresponding water storage bottle opens, allowing the external water sample to enter the corresponding water storage bottle.

[0024] The multi-point water quality sampler is deployed to the second sampling area or moves autonomously underwater to the second sampling area, and the above steps are repeated.

[0025] Optionally, when the external water sample enters the sampling tube, the external water sample on the right side of the sampling piston is discharged from the sampling tube;

[0026] When the external water sample enters the water storage bottle through the sampling tube, the external water sample re-enters the sampling tube on the right side of the sampling piston.

[0027] The beneficial effects of this invention are:

[0028] (1) In this invention, the mutual cooperation between the motor, transmission components and sampling piston enables the rapid and simple absorption of external water samples into the sampling tube, and the overall device is highly integrated, making it lightweight and small in size;

[0029] (2) By designing a diversion plate and multiple water storage bottles, the present invention allows water samples from different locations to be stored in different water storage bottles, thus avoiding problems such as inaccurate data caused by water sample mixing.

[0030] (3) The present invention uses a design where the sampling tube and the bottom of the water storage bottle are not sealed, so that the overall buoyancy of the device is balanced before and after water is taken, thus solving various problems caused by changes in buoyancy. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a multi-point water quality sampler provided in an embodiment of the present invention;

[0032] Figure 2 A cross-sectional view of a multi-point water quality sampler provided in an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the sampling mechanism in the multi-point water quality sampler provided in an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the water storage bottle in the multi-point water quality sampler provided in an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the sampling method provided in an embodiment of the present invention.

[0036] Figure label:

[0037] 10-Power mechanism; 20-Sampling mechanism; 30-Storage mechanism; 1-Sampling piston; 2-External water inlet;

[0038] 3-Sampling tube; 4-Water storage bottle; 51-Nut sleeve; 52-Screw; 6-Diverter plate; 7-Solenoid valve;

[0039] 8-Motor; 9-Power compartment. Detailed Implementation

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] This application proposes a multi-point water quality sampler, such as... Figure 1 As shown, the device includes a power mechanism 10, a sampling mechanism 20, and a storage mechanism 30. The power mechanism 10 provides power for the sampling mechanism 20 to draw water samples, and the storage mechanism 30 is used to store the water samples drawn by the sampling mechanism 20.

[0042] Specifically, such as Figure 2 and Figure 3 As shown, the sampling mechanism 20 includes a transmission component, a sampling piston 1, an external water inlet 2, and a sampling tube 3. The transmission component connects the power mechanism 10 and the sampling piston 1. After the power mechanism 10 provides power to the transmission component, the transmission component drives the sampling piston 1 to move linearly within the sampling tube 3. It should be noted that the sampling piston 1 and the inner wall of the sampling tube 3 should be sealed, and the top of the sampling tube 3 is connected to the external water inlet 2. The external water inlet 2 is arranged around the sampling tube 3, with a channel for conveying water samples in between, and the bottom of the sampling tube 3 is not closed. That is, as the power mechanism 10 operates, the transmission component drives the sampling piston 1 to move to the right. During this process, a vacuum environment is formed between the sampling piston 1 and the top of the sampling tube 3. Under the action of the pressure difference, the external water sample flows into the sampling tube 3 through the external water inlet 2. As the sampling piston 1 pushes to the right, the external water sample on its right side is also pushed out of the sampling tube 3, so that the buoyancy of the sampling mechanism 20 is balanced before and after water sampling.

[0043] In addition, to ensure that water samples from different locations do not contaminate the data due to mixing, the storage mechanism 30 includes multiple water storage bottles 4, and the outlet of the sampling tube 3 is connected to the inlet of multiple water storage bottles 4. Water samples from different locations are stored in different water storage bottles 4.

[0044] The transmission components include a threaded nut sleeve 51 and a screw 52. The nut sleeve 51 is connected to the power mechanism 10 and rotates under force. The screw 52 is connected to the sampling piston 1 and rotates with the rotation of the nut sleeve 51. It also moves linearly in the left and right directions, thus driving the sampling piston 1 to move linearly.

[0045] Specifically, in addition to multiple water storage bottles 4, to facilitate the entry of water samples from different locations into different water storage bottles 4, the storage mechanism 30 also includes a diversion plate 6. This diversion plate 6 is fixedly connected to the multiple water storage bottles 4 and is disc-shaped, including a diversion inlet and multiple diversion outlets connected to the diversion inlet via multiple flow channels. Each of the multiple diversion outlets corresponds one-to-one with the inlet of each of the multiple water storage bottles 4, and the diversion inlet is connected to the outlet of the sampling tube 3. When an external water sample enters the sampling tube 3, the water sample flows into the diversion plate 6 through the diversion inlet, then flows through different flow channels to different diversion outlets, and finally enters the corresponding water storage bottle 4.

[0046] To control the flow in each channel, multiple solenoid valves 7 are installed at the inlet of each of the multiple water storage bottles 4. The number of solenoid valves 7 is the same as the number of water storage bottles 4. When an external water sample enters the diverter plate 6, the solenoid valve 7 of the corresponding channel opens, allowing the corresponding channel to flow and the external water sample to smoothly enter the corresponding water storage bottle 4.

[0047] To prevent external water samples from flowing out of the external inlet 2 during the leftward movement of the sampling piston 1, a one-way valve is installed at the external inlet 2, so that external water samples can only enter the device from the outside and cannot return to the external water area from the device.

[0048] Specifically, such as Figure 4 As shown, each water storage bottle 4 includes a water storage tube 41 and a water storage piston 42. The water storage tube 41 has a circular cross-section and is pipe-shaped. To ensure buoyancy balance, its bottom is not sealed. The water storage piston 42 is movably disposed inside the water storage tube 41, and the water storage tube wall and the water storage piston 42 are sealed, forming a sealed water storage cavity with the water storage piston 42, the water storage tube wall, and the top of the water storage tube 41. As the water sample enters the water storage cavity, the water sample pushes the water storage piston 42 to the right, and the volume of the water storage cavity increases accordingly. At the same time, the external water sample on the right side of the water storage piston 42 is pushed out of the water storage tube 41, so that the buoyancy of the water storage bottle 4 is balanced before and after water enters, avoiding problems caused by buoyancy imbalance.

[0049] Specifically, the power mechanism 10 includes a motor 8, a controller, and electronic devices such as sensors. The motor 8 connects to the transmission components and provides power for the movement of the transmission components and the sampling piston 1. When the motor 8 rotates forward, the nut sleeve 51 rotates forward with the motor 8, and the sampling piston 1 moves to the right; when the motor 8 rotates in reverse, the nut sleeve 51 rotates in reverse with the motor 8, and the sampling piston 1 moves to the left. The controller and sensors work together to assist the overall device in underwater operation. To protect the aforementioned electronic components and prevent water ingress or pressure problems from hindering the water sampling process, a power compartment 9 is also provided outside the electronic components. To reduce the resistance of the device's underwater movement, the power compartment 9 in this application is shaped like a rounded bullet.

[0050] In addition, to protect the sampling mechanism 20 and the storage mechanism 30, a shell is provided outside the sampling mechanism 20 and the storage mechanism 30. Furthermore, to facilitate water ingress, multiple round holes can be provided on the shell to allow external water samples to enter the shell through these holes.

[0051] This application also provides a sampling method for the aforementioned multi-point water quality sampler, such as... Figure 5 As shown, the sampling method includes:

[0052] S1: The multi-point water quality sampler is deployed to the first sampling area, and the motor 8 rotates forward, driving the nut sleeve 51 to rotate forward.

[0053] S2: The transmission component drives the sampling piston 1 to move to the right, and the external water sample enters the sampling tube 3 through the external water inlet 2;

[0054] S3: Motor 8 reverses, the transmission component drives the nut sleeve 51 to reverse, the solenoid valve 7 of the corresponding water storage bottle 4 opens, and the external water sample enters the corresponding water storage bottle 4.

[0055] S4: The multi-point water quality sampler is deployed to the second sampling area or moves autonomously underwater to the second sampling area, and the above steps are repeated.

[0056] When the device is placed in the first sampling area, the motor 8 starts to rotate forward. Since the nut sleeve 51 is connected to the motor 8, the nut sleeve 51 rotates forward with the motor 8, driving the screw 52, ​​which is threaded into the nut sleeve 51, to rotate forward and move to the right. The sampling piston 1 then moves to the right. As a vacuum environment gradually forms between the sampling piston 1 and the top of the sampling tube 3, the external water sample flows into the sampling tube 3 through the external inlet 2 under the action of the pressure difference. When the sampling tube 3 is full of water sample, the motor 8 reverses, driving the nut sleeve 51 and the screw 52 to reverse as well. The sampling piston 1 moves to the left. Since a one-way valve is provided at the external inlet 2, the water sample in the sampling tube 3 enters the diversion plate 6. At the same time, the solenoid valve 7 of the corresponding water storage bottle 4 is opened, allowing the flow channel of the corresponding water storage bottle 4 to circulate, and the water sample flows into the corresponding water storage bottle 4 from the corresponding flow channel. If water storage bottle 4 is still not full, repeat the above steps until enough water sample is collected. Then the device will be deployed to the next water sampling area. Alternatively, an autonomous operation device can be added to the device to allow it to move autonomously underwater to the next sampling area and repeat the above water sampling steps.

[0057] 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 multi-point water quality sampler, characterized in that, include: The system includes a power mechanism, a sampling mechanism, and a storage mechanism, wherein the power mechanism provides power to the sampling mechanism, and the storage mechanism stores the water sample taken by the sampling mechanism. The sampling mechanism includes a transmission component, a sampling piston, an external water inlet, and a sampling tube. The transmission component connects the power mechanism and the sampling piston. The sampling piston is disposed inside the sampling tube, and the bottom of the sampling tube is not closed. The transmission component drives the sampling piston to move inside the sampling tube. The external water inlet is arranged around the sampling tube, and the top of the sampling tube is connected to the external water inlet. The storage mechanism includes multiple water storage bottles, and the outlet of the sampling mechanism is connected to the inlet of the multiple water storage bottles; The water storage bottle includes a water storage tube and a water storage piston. The water storage piston is disposed inside the water storage tube. The water storage piston and the water storage tube are in a sealed state, and the bottom of the water storage tube is in a non-sealed state. The power mechanism includes a motor, which provides power to the transmission component; The transmission component includes a threaded nut sleeve and a screw rod. The nut sleeve is connected to the power mechanism and rotates with the power mechanism. The screw rod is connected to the sampling piston. Each of the multiple water storage bottles is equipped with a solenoid valve at its inlet.

2. The multi-point water quality sampler according to claim 1, characterized in that, The storage mechanism also includes a diversion plate, which is fixedly connected to the plurality of water storage bottles and is disc-shaped. It includes a diversion inlet and a plurality of diversion outlets connected to the diversion inlet through multiple flow channels. The diversion inlet is connected to the outlet of the sampling tube, and the plurality of diversion outlets are respectively connected to the inlets of the plurality of water storage bottles.

3. The multi-point water quality sampler according to claim 1, characterized in that, A one-way valve is installed at the external water inlet.

4. The multi-point water quality sampler according to claim 1, characterized in that, The power mechanism also includes a power compartment located outside the motor.

5. A sampling method for a multi-point water quality sampler as described in any one of claims 1-4, characterized in that, The sampling method includes: The multi-point water quality sampler is deployed to the first sampling area, and the motor rotates forward, driving the nut sleeve to rotate forward. The transmission component drives the sampling piston to move to the right, and the external water sample enters the sampling tube through the external water inlet; When the motor reverses, the transmission component drives the nut sleeve to reverse, and the solenoid valve of the corresponding water storage bottle opens, allowing the external water sample to enter the corresponding water storage bottle. The multi-point water quality sampler is deployed to the second sampling area or moves autonomously underwater to the second sampling area, and the above steps are repeated.

6. The sampling method according to claim 5, characterized in that, When the external water sample enters the sampling tube, the external water sample on the right side of the sampling piston is discharged from the sampling tube; When the external water sample enters the water storage bottle through the sampling tube, the external water sample re-enters the sampling tube on the right side of the sampling piston.

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