Rapid in-situ water quality detection device

Abstract

The invention provides a rapid in-situ water quality detection device which comprises an extraction device, and the extraction device comprises a first barrel, a pressure regulating assembly and a driving assembly. A relatively closed water storage area is formed by the first cylinder body. And the pressure adjusting assembly is used for adjusting the pressure intensity of the water storage area. Wherein when the water storage area is in a negative pressure state, bubbles in a water sample in the water storage area are separated out and the water sample is separated, so that the water sample is divided into gas and liquid; when the water storage area is in a normal pressure state or a positive pressure state, the liquid flows out of the first barrel. And the driving assembly is used for providing power for the pressure regulating assembly. Therefore, the water storage area is subjected to pressure regulation treatment, and dissolved bubbles in the water sample are promoted to be quickly separated out by utilizing the dynamic relationship between the gas solubility and the pressure. The interference of bubbles on an optical sensor and an electrochemical probe in the detection device is effectively eliminated, and abnormal light scattering or poor electrode contact is avoided, so that the data accuracy is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality detection, and particularly to a rapid in-situ water quality detection device. Background Art

[0002] The rapid in-situ water quality detection technology integrates multi-parameter sensors and real-time analysis modules to achieve on-site instant detection of key indicators such as dissolved oxygen, pH, and heavy metals in water bodies, effectively breaking through the limitations of long detection cycles and large sampling interference in traditional laboratories, and playing an important role in fields such as drinking water safety monitoring, industrial water treatment, and ecological environment early warning.

[0003] In actual applications, for existing rapid in-situ water quality detection devices, dissolved gases in natural water bodies or bubbles entrained by turbulence will adhere to the sensor surface, interfering with the optical detection light path and blocking the effective contact between the electrochemical probe and the water body. In addition, the accumulation of bubbles in the flow channel may trigger the cavitation effect of the microfluidic system, resulting in distorted detection data, especially in complex water bodies such as eutrophic lakes, high-pressure pipe networks, or high-turbidity rivers.

[0004] Most existing improvement schemes use an external pretreatment module for bubble separation, but the use of an external pretreatment module significantly increases the equipment volume and energy consumption, making it difficult to adapt to the deployment requirements of long-term unattended operation in the wild or in small spaces. Summary of the Invention

[0005] Based on this, it is necessary to provide a rapid in-situ water quality detection device for the problem that bubbles in the water sample of the current rapid in-situ water quality detection device interfere with the normal operation of the detection device, resulting in deviation of the detection data.

[0006] The above object is achieved by the following technical solutions: A rapid in-situ water quality detection device includes: an extraction device, and the extraction device includes a first cylinder, a pressure regulating component, and a driving component.

[0007] The first cylinder forms a relatively closed water storage area for accommodating the water sample to be pretreated.

[0008] The pressure regulating component is used to adjust the pressure of the water storage area.

[0009] Wherein, when the water storage area is in a negative pressure state, the bubbles in the water sample in the water storage area precipitate and separate from the water sample, so that the water sample is divided into gas and liquid; when the water storage area is in an atmospheric pressure state or a positive pressure state, the liquid flows out of the first cylinder.

[0010] The driving component is used to provide power to the pressure regulating component.

[0011] In one embodiment, the pressure regulating assembly includes a first piston. The first piston and the first cylinder body enclose to form the water storage area. When the first piston moves forward, the pressure in the water storage area decreases; when the first piston moves backward, the pressure in the water storage area increases.

[0012] In one embodiment, the first piston is provided with a first one-way valve. When the water storage area is in a positive pressure state, the first one-way valve allows gas to be discharged from the water storage area through the first one-way valve.

[0013] In one embodiment, the pressure regulating assembly includes a first piston rod. The first piston rod is used to retain the liquid in the water storage area before discharging the gas; after discharging the gas, the first piston rod causes the liquid to be discharged from the water storage area.

[0014] In one embodiment, the driving assembly includes a rotating rod and a connecting structure. One end of the connecting structure is movably connected to the rotating rod, and the other end of the connecting structure is connected to the first piston. When the rotating rod rotates around its own axis, the first piston slides along the central axis of the first cylinder body.

[0015] In one embodiment, a slideway is provided on the rotating rod. The connecting structure includes a first connecting rod. The first connecting rod drives the first piston to reciprocate along the central axis of the first cylinder body along the slideway.

[0016] In one embodiment, the connecting structure includes a second connecting rod. One end of the second connecting rod is connected to the first piston, and the other end of the second connecting rod is slidably connected to the first connecting rod.

[0017] The first connecting rod and the second connecting rod are connected by an elastic member. The elastic force of the elastic member always causes the first connecting rod and the second connecting rod to approach each other or tend to approach each other.

[0018] The first connecting rod and the second connecting rod are in close contact, so that the area where the elastic member is located is a sealed area. The sealed area prevents the first connecting rod and the second connecting rod from having relative displacement when the first piston moves backward.

[0019] In one embodiment, the first connecting rod is provided with a pneumatic valve. The pneumatic valve causes the elastic member to return to its initial state.

[0020] In one embodiment, the driving assembly includes a baffle. The baffle is used to prevent the water sample from continuing to enter the water storage area after the water sample in the water storage area reaches a preset value.

[0021] In one embodiment, the first cylinder includes a water inlet for allowing a water sample to enter the water storage area. The water inlet is provided with a first filter screen for isolating impurities in the water sample.

[0022] The beneficial effects of the present invention are as follows: The present invention provides a rapid in-situ water quality detection device, including: an extraction device, which includes a first cylinder, a pressure regulating component, and a driving component. The first cylinder forms a relatively enclosed water storage area. The pressure regulating component is used to adjust the pressure in the water storage area. Among them, when the water storage area is in a negative pressure state, air bubbles in the water sample in the water storage area precipitate and separate from the water sample, so that the water sample is divided into gas and liquid; when the water storage area is in an atmospheric pressure state or a positive pressure state, the liquid flows out of the first cylinder. The driving component is used to provide power to the pressure regulating component. Thus, by performing pressure regulation on the water storage area and utilizing the dynamic relationship between gas solubility and pressure, the dissolved air bubbles in the water sample are promoted to precipitate rapidly. The interference of air bubbles on the optical sensor and the electrochemical probe in the detection device is effectively eliminated, avoiding abnormal light scattering or poor electrode contact, thereby significantly improving the data accuracy. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the rapid in-situ water quality detection device provided by an embodiment of the present invention; Figure 2 It is Figure 1 the top view of the rapid in-situ water quality detection device in Figure 3 It is Figure 2 the A-A cross-sectional view of the rapid in-situ water quality detection device in Figure 4 It is Figure 2 the A-A cross-sectional view of the rapid in-situ water quality detection device when the first piston is in the second stage in Figure 5 It is Figure 1 the schematic structural diagram of the rapid in-situ water quality detection device in , in which the main housing is hidden for easy observation; Figure 6 It is Figure 5 the enlarged view of part B of the rapid in-situ water quality detection device in .

[0024] Among them: 100, main housing; 200, first cylinder; 210, water inlet; 211, second one-way valve; 220, water outlet; 221, third one-way valve; 230, first sub-cylinder; 240, second sub-cylinder; 250, first filter screen; 300, Pressure regulating assembly; 310, First piston; 320, First one-way valve; 330, First piston rod; 331, Second piston; 400, Driving assembly; 410, Rotating rod; 411, Slideway; 420, First connecting rod; 421, Sliding block; 430, Second connecting rod; 440, Elastic member; 450, Baffle; 500, Detection device. Detailed implementation mode

[0025] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The terms "connection" and "coupling" as used in the present invention, unless otherwise clearly defined and limited, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0027] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0028] Next, refer to Figures 1-5 to describe the rapid in-situ water quality detection device provided by the embodiments of the present invention.

[0029] As Figures 1-4 shown, the rapid in-situ water quality detection device includes a main housing 100. The main housing 100 encloses a space relatively isolated from the external environment, and most of the other components are located in this space to protect the components inside the main housing 100.

[0030] An extraction device and a detection device 500 are arranged inside the main housing 100. The extraction device is used to collect water samples and preprocess the water samples to ensure the accuracy of subsequent detections. The extraction device transfers the processed water samples to the detection device 500. The detection device 500 is based on the principles of optical and electrochemical sensing, and accurately measures the key parameters of water quality in real time. The detection device 500 is used to directly output quantitative indicators through multi-sensor collaborative analysis and signal processing, realizing rapid and interference-free on-site dynamic monitoring and evaluation of water quality.

[0031] The extraction device includes a first cylinder 200, a pressure regulating component 300, and a driving component 400.

[0032] The first cylinder 200 forms a relatively closed water storage area, which is used to hold the water samples that need to be preprocessed.

[0033] The first cylinder 200 includes a water inlet 210 and a water outlet 220. The water samples to be detected enter the first cylinder 200 from the water inlet 210, and the preprocessed liquid flows out of the first cylinder 200 from the water outlet 220.

[0034] A second one-way valve 211 is arranged at the water inlet 210. The second one-way valve 211 is used to ensure that the water samples entering the first cylinder 200 cannot flow out of the first cylinder 200 from the water inlet 210. A third one-way valve 221 is arranged at the water outlet 220. The third one-way valve 221 is used to ensure that the liquid after the detection does not flow back into the first cylinder 200 through the water outlet 220. When processing the water samples, the second one-way valve 211 and the third one-way valve 221 prevent the water samples from flowing out of the first cylinder 200.

[0035] It can be understood that the positions of the water inlet 210 and the water outlet 220 of the first cylinder 200 can be diverse. For example, the water inlet 210 is located on the side wall of the first cylinder 200, and the water outlet 220 is located at the bottom of the first cylinder 200.

[0036] However, the positional relationship between the water inlet 210 and the water outlet 220 should be such that the water samples can first enter the first cylinder 200 from the water inlet 210 for preprocessing, and the preprocessed liquid flows out from the water outlet 220.

[0037] The pressure regulating component 300 is used to regulate the pressure in the water storage area. Bubbles naturally present in the water samples or generated due to factors such as water flow disturbance will interfere with the normal operation of existing rapid in-situ water quality detection devices. These bubbles may adhere to the surface of the detection sensors, preventing the sensors from fully contacting the water body, and thus causing deviations in the detection data and unable to truly reflect the water quality status. Based on this, a pressure regulating component 300 is arranged inside the first cylinder 200 to eliminate or weaken the adverse effects of bubbles on the detection.

[0038] When the water sample in the water storage area reaches a preset value, the pressure regulating component 300 starts to work, reducing the pressure in the water storage area to a negative pressure state. At this time, the gas dissolved in the water sample will precipitate to form bubbles due to the decrease in solubility. The bubbles may gather and rise to the liquid surface, entering the upper gas space, so that the water sample is divided into gas and liquid.

[0039] After the bubbles are precipitated and separated from the water sample, the pressure regulating component 300 starts to increase the pressure in the water storage area, adjusting it to an atmospheric pressure state or a positive pressure state. At this time, the third one-way valve 221 is opened, so that the liquid flows out of the first cylinder 200 and enters the detection device 500.

[0040] It can be understood that the positional relationship between the pressure regulating component 300 and the first cylinder 200 can be diverse. For example, an independent pressure regulating control system can be adopted, and the pressure regulating control system is suspended on the outer peripheral wall of the first cylinder 200, and the two are connected through a pressure pipeline, and then the pressure in the first cylinder 200 is adjusted; it can also be an integrated pressure regulating control system, and the pressure regulating control system is arranged on or in the first cylinder 200.

[0041] The driving component 400 serves as the power source of the extraction device, and the driving component 400 provides power for the movement of other parts, including but not limited to the start of the pressure regulating component 300.

[0042] It can be understood that the driving component 400 can be a common driving form, such as an electric motor, an internal combustion engine, etc. The power source in the driving component 400 can be centralized, and the power is transmitted to other components through a transmission structure; the power source can also be decentralized, and multiple decentralized power sources respectively drive each component to act.

[0043] It can be understood that in order to ensure the treatment effect of the water sample, after the water sample in the first cylinder 200 reaches the preset value, both the second one-way valve 211 and the third one-way valve 221 are in a closed state, so that the water sample does not flow out of the first cylinder 200; then the pressure regulating component 300 pre-treats the water sample, so that the water sample is divided into gas and liquid; finally, the third one-way valve 221 is opened, and the liquid enters the detection device 500 for detection.

[0044] Therefore, the rapid in-situ water quality detection device provided by the embodiment of the present invention, through the pressure regulation treatment of the water storage area, utilizes the dynamic relationship between gas solubility and pressure to promote the rapid precipitation of dissolved bubbles in the water sample. It effectively eliminates the interference of bubbles on the optical sensor and the electrochemical probe in the detection device 500, avoids abnormal light scattering or poor electrode contact, and thus significantly improves the data accuracy.

[0045] In one of the embodiments, such as Figures 2-4As shown in the figure, the pressure regulating assembly 300 includes a first piston 310. The first piston 310 and the first cylinder 200 enclose a water storage area, and the pressure of the water storage area is adjusted by the movement of the first piston 310 in the first cylinder 200.

[0046] The central axis of the first cylinder 200 is the first axis. The first piston 310 is located inside the first cylinder 200 and closely fits the inner peripheral wall surface of the first cylinder 200. The first piston 310 can slide along the first axis within the first cylinder 200.

[0047] Specifically, taking Figure 2 as an example, the upward movement of the first piston 310 along the first axis is the forward movement, and the downward movement of the first piston 310 along the first axis is the reverse movement.

[0048] The first piston 310 has a first stage and a second stage inside the first cylinder 200. In the first stage, the first piston 310 moves forward along the first axis, causing the pressure in the water storage area to decrease, gradually changing from the normal pressure state to the negative pressure state. In the second stage, the first piston 310 moves reversely along the first axis inside the first cylinder 200, causing the pressure in the water storage area to increase, changing from the negative pressure state to the normal pressure state or the positive pressure state.

[0049] In the initial state, the first piston 310 is at the lowest end of the first cylinder 200.

[0050] In the first stage, the first piston 310 starts to move forward, and the water sample enters the water storage area. When the water sample reaches the preset value, it no longer enters. At this time, the inside of the first cylinder 200 is in the normal pressure state. The first piston 310 continues to move forward until it reaches the highest point, and the pressure in the water storage area gradually decreases to a negative pressure state. The bubbles in the water sample precipitate and separate from the water sample, separating the water sample into gas and liquid.

[0051] Entering the second stage, the first piston 310 moves downward. When the pressure in the water storage area reaches the normal pressure state or the positive pressure state, the third one-way valve 221 is opened, allowing the liquid to flow out of the water storage area.

[0052] Thus, the pressure of the water storage area is adjusted by the first piston 310.

[0053] Furthermore, a first one-way valve 320 is provided on the first piston 310. When the water storage area is in the positive pressure state, the first one-way valve 320 allows the gas to be discharged from the water storage area through the first one-way valve 320.

[0054] Since, when the water storage area is in a positive pressure state, some of the unexpelled gas will redissolve into the liquid. To improve the pretreatment efficiency of the water sample, a first one-way valve 320 is provided on the first piston 310, and a through hole is provided at the uppermost part of the first cylinder 200. In the second stage, the first piston 310 continuously moves downward, so that when the water storage area is in a positive pressure state, the gas above the liquid is discharged from the first cylinder 200 through the first one-way valve 320. After the gas is discharged, the third one-way valve 221 is opened, and the liquid flows out of the first cylinder 200.

[0055] It can be understood that, in order to expel more gas, the first piston 310 can descend a relatively large distance and then open the third one-way valve 221 to allow the liquid to flow out. At this time, some liquid may flow out from the first one-way valve 320, but it will not cause a large loss and does not affect the detection effect of the detection device 500.

[0056] In one of the embodiments, the pressure regulating assembly 300 includes a first piston rod 330, and the first piston rod 330 is used to discharge the liquid from the water storage area after the gas is discharged.

[0057] In order to drive the opening and closing action of the third one-way valve 221 through the movement of the first piston 310, a first sub-cylinder 230 and a second sub-cylinder 240 are extended from the lowermost part of the first cylinder 200. The first cylinder 200, the first sub-cylinder 230, the second sub-cylinder 240 and the detection device 500 are fixedly connected in sequence, and the third one-way valve 221 is located at the connection between the second sub-cylinder 240 and the detection device 500. The inner diameter of the inner wall of the first sub-cylinder 230 is smaller than the inner diameter of the inner wall of the second sub-cylinder 240. A first piston rod 330 extends downward from the first piston 310 along the first axis direction, and a second piston 331 is provided at the lowermost end of the first piston rod 330. The second piston 331 can closely adhere to the inner peripheral wall surface of the first sub-cylinder 230.

[0058] When the first piston 310 is in the first stage, the first piston 310 drives the second piston 331 to move within the first sub-cylinder 230, so that the amount of the water sample in the water storage area can reach a preset value; When the first piston 310 is in the second stage, before the gas is discharged, the second piston 331 moves downward within the first sub-cylinder 230. When the gas is completely discharged, the first piston 310 continues to move downward, driving the second piston 331 into the second sub-cylinder 240. At this time, the liquid can enter the first sub-cylinder 230 and the second sub-cylinder 240.

[0059] Furthermore, as the first piston 310 moves downward, a positive pressure state is formed inside the first sub-cylinder 230 and the second sub-cylinder 240, thereby opening the third one-way valve 221 to allow the liquid to enter the detection device 500.

[0060] Thus, a first piston rod 330 extends under the first piston 310, enabling the movement of the first piston 310 to further control the third one-way valve 221.

[0061] It can be understood that, on the one hand, each time the water sample is pretreated, part of the water sample enters the first sub-cylinder 230 and the second sub-cylinder 240 before treatment. Before using the rapid in-situ water quality detection device, the extraction device can be used to pretreat multiple groups of water samples as a preparatory work, so that the first sub-cylinder 230 and the second sub-cylinder 240 are reserved with the liquids that have completed pretreatment, and then the rapid in-situ water quality detection device can be used to record the detection data.

[0062] In one of the embodiments, as Figures 2-6 shown, the driving assembly 400 includes a rotating rod 410 and a connecting structure. The rotating rod 410 is used to drive the movement of the first piston 310, and the connecting structure is used to connect the rotating rod 410 and the first piston 310.

[0063] Specifically, one end of the rotating rod 410 and the connecting structure are connected by a screw drive, and the other end of the connecting structure is connected to the first piston 310.

[0064] In the first stage, the forward rotation of the rotating rod 410 drives the connecting structure to move upward, causing the first piston 310 to move upward; in the second stage, the reverse rotation of the rotating rod 410 drives the connecting structure to move downward, causing the first piston 310 to move downward.

[0065] Thus, the movement of the first piston 310 is driven by the rotation of the rotating rod 410.

[0066] It can be understood that the rotation of the rotating rod 410 can be driven by a rotating motor, or other driving structures can be used to drive the rotating rod 410. At the same time, the connecting structure can be fixedly connected to the first piston 310 or movably connected to the first piston 310.

[0067] Furthermore, a slideway 411 is provided on the rotating rod 410. The connecting structure includes a first connecting rod 420, and the first connecting rod 420 can realize the reciprocating movement of the first piston 310 along the slideway 411. In order to realize the reciprocating movement of the first piston 310 without changing the rotation direction of the rotating rod 410, a slideway 411 with a continuous bending structure is provided on the rotating rod 410, and the first connecting rod 420 extends out a sliding block 421, so that the sliding block 421 is always located on the slideway 411. Thus, the reciprocating movement of the first piston 310 is realized through the slideway 411 on the rotating rod 410.

[0068] In one of the embodiments, as Figures 2-4As shown in the figure, since the gas content in the water sample is variable, in order to adjust the moving displacement of the first piston 310 according to the gas content in the water sample, the connecting structure includes a second connecting rod 430. The first connecting rod 420 and the second connecting rod 430 are slidably connected by an elastic member 440.

[0069] One end of the second connecting rod 430 is connected to the first piston 310, and the other end of the second connecting rod 430 is slidably connected to the first connecting rod 420. The first connecting rod 420 and the second connecting rod 430 are connected by an elastic member 440. The elastic force of the elastic member 440 always makes the first connecting rod 420 and the second connecting rod 430 approach each other or tend to approach each other.

[0070] The first connecting rod 420 and the second connecting rod 430 are in close contact, so that the area where the elastic member 440 is located is a sealed area. The sealed area makes the distance between the first connecting rod 420 and the second connecting rod 430 maintain the distance between the first connecting rod 420 and the second connecting rod 430 at the end of the first stage when the first piston 310 moves in the reverse direction. Thus, the moving displacement of the first piston 310 is positively correlated with the gas content in the water sample.

[0071] The rotating rod 410 acts directly on the first connecting rod 420, so that the highest point of the first connecting rod 420 remains unchanged. Since the second connecting rod 430 and the first connecting rod 420 are connected by an elastic member 440, the second connecting rod 430 can also move with the first connecting rod 420, but the highest point of the second connecting rod 430 is related to the stretching degree of the elastic member 440.

[0072] When there is more gas in the water sample, the pressure difference between the end of the first stage and the atmospheric pressure state is smaller, so that the stretching degree of the elastic member 440 is smaller, and the first piston 310 is in a higher position; in the second stage, the first piston 310 moves down a larger displacement to completely discharge the gas.

[0073] When there is less gas in the water sample, the pressure difference between the end of the first stage and the atmospheric pressure state is larger, so that the stretching degree of the elastic member 440 is larger, and the first piston 310 is in a lower position; in the second stage, the first piston 310 moves down a smaller displacement to completely discharge the gas.

[0074] Furthermore, an air pressure valve is provided on the first connecting rod 420 so that the elastic member 440 can return to its initial state.

[0075] In the first stage, the first connecting rod 420 and the second connecting rod 430 move away from each other, causing a negative pressure state to form in the sealed area. At the end of the second stage, the first piston 310 reaches the lowest point, and the first cylinder 200 restricts the further downward movement of the first piston 310. The first connecting rod 420 continues to move downward, causing relative sliding between the first connecting rod 420 and the second connecting rod 430. The air pressure valve on the first connecting rod 420 opens, causing the sealed area to return to normal pressure, and the elastic member 440 returns to its initial state.

[0076] Thus, the gas content of the water sample can be determined by the stretching degree of the elastic member 440 and the moving displacement of the first piston 310. At the same time, the moving displacement of the first piston 310 can be adjusted according to the gas content in the water sample.

[0077] In one embodiment, as Figures 2-6 shown, the driving assembly 400 includes a baffle 450, which is used to prevent the water sample in the water storage area from continuing to enter the water storage area after the water sample reaches a preset value.

[0078] The baffle 450 and the first piston 310 move synchronously. In the first stage, the baffle 450 and the first piston 310 move upward synchronously. When the water sample reaches the preset value, the baffle 450 reaches the position of the water inlet 210, preventing the water sample from continuing to enter the first cylinder 200. In the second stage, the baffle 450 follows the first piston 310 and moves downward synchronously to the initial position.

[0079] It can be understood that other common limiting mechanisms can also be applied to the present invention, such as a limiting structure triggered by pressure.

[0080] In one embodiment, as Figures 2-6 shown, in order to prevent impurities from entering the first cylinder 200, a first filter screen 250 is provided at the water inlet 210 of the first cylinder 200.

[0081] Furthermore, the baffle 450 is made to move closely against the first filter screen 250. Thus, through the reciprocating movement of the baffle 450, the impurities on the surface of the first filter screen 250 can be scraped off.

[0082] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0083] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. A rapid in-situ water quality detection device, characterized in that, Comprising: An extraction device, which includes a first cylinder body, a pressure regulating component, and a driving component; The first cylinder body forms a relatively enclosed water storage area for accommodating the water sample to be pretreated; The pressure regulating component is used to adjust the pressure of the water storage area; Wherein, when the water storage area is in a negative pressure state, the bubbles in the water sample in the water storage area precipitate and separate from the water sample, so that the water sample is divided into gas and liquid; when the water storage area is in an atmospheric pressure state or a positive pressure state, the liquid flows out of the first cylinder body; The driving component is used to provide power to the pressure regulating component.

2. The rapid in-situ water quality detection device according to claim 1, characterized in that The pressure regulating component includes a first piston. The first piston and the first cylinder body enclose to form the water storage area. When the first piston moves forward, the pressure of the water storage area decreases; when the first piston moves backward, the pressure of the water storage area increases.

3. The rapid in-situ water quality detection device according to claim 2, characterized in that, The first piston is provided with a first one-way valve. When the pressure of the water storage area increases to a positive pressure, the first one-way valve allows the gas to be discharged from the first one-way valve out of the water storage area.

4. The rapid in-situ water quality detection device according to claim 3, characterized in that, The pressure regulating component includes a first piston rod, which is used to keep the liquid in the water storage area before discharging the gas; after discharging the gas, the first piston rod allows the liquid to flow out of the water storage area.

5. The rapid in-situ water quality detection device according to claim 2, characterized in that, The driving component includes a rotating rod and a connecting structure. One end of the connecting structure is movably connected to the rotating rod, and the other end of the connecting structure is connected to the first piston. When the rotating rod rotates around its own axis, the first piston slides along the central axis of the first cylinder body.

6. The rapid in-situ water quality detection device according to claim 5, characterized in that, A slideway is provided on the rotating rod. The connecting structure includes a first connecting rod, and the first connecting rod drives the first piston to reciprocate along the central axis of the first cylinder body along the slideway.

7. The rapid in-situ water quality detection device according to claim 6, characterized in that, The connecting structure includes a second connecting rod. One end of the second connecting rod is connected to the first piston, and the other end of the second connecting rod is slidably connected to the first connecting rod; The first connecting rod and the second connecting rod are connected by an elastic member, and the elastic force of the elastic member always makes the first connecting rod and the second connecting rod approach each other or tend to approach each other; The first connecting rod and the second connecting rod are in close contact, so that the area where the elastic member is located is a sealed area, and the sealed area makes the first connecting rod and the second connecting rod not displace relative to each other when the first piston moves backward.

8. The rapid in-situ water quality detection device according to claim 7, characterized in that, The first connecting rod is provided with a pneumatic valve, and the pneumatic valve makes the elastic member return to its initial state.

9. The rapid in-situ water quality detection device according to claim 2, characterized in that, The driving component includes a baffle, which is used to prevent the water sample from continuing to enter the water storage area after the water sample in the water storage area reaches a preset value.

10. The rapid in-situ water quality detection device according to any one of claims 1-9, characterized in that, The first cylinder body includes a water inlet for allowing the water sample to enter the water storage area. The water inlet is provided with a first filter screen for isolating impurities in the water sample.

Images