Water body sampling device

Abstract

The invention relates to the technical field of water pollution detection, in particular to a water body sampling device. Comprising a sealing shell, a sample box and a triggering device, an accommodating cavity for accommodating the sample box is formed in the sealing shell; an airtight cavity is further formed in the sealing shell; the trigger device comprises an airtight plate and a spring; the spring is arranged in the airtight cavity; the spring is connected with the airtight plate, so that the airtight plate can slide relative to the airtight cavity; a sampling hole is formed in the airtight cavity; the sampling hole is communicated with the sample box; when the airtight plate passes through the sampling hole, the water body can flow into the sample box through the sampling hole. In the prior art, only a shallow water body sample can be obtained, and a detection result is easy to distort. Compared with the prior art, the water body sample at the specific depth can be effectively obtained, so that the data accuracy is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water pollution detection, in particular to a water sampling device. Background Art

[0002] Water environment monitoring, as a core component of environmental protection and water resources management, plays a crucial role. It not only serves as the foundation for assessing water quality and predicting trends, but also as a crucial basis for developing appropriate water resource protection strategies and pollution control measures. This process utilizes a series of scientifically rigorous methods to measure representative indicators that may impact water quality, thereby comprehensively and accurately depicting the water quality status and its dynamics.

[0003] Water environment monitoring covers a wide range of areas and falls into two main categories: water quality monitoring of polluted water bodies and pollution source monitoring. Polluted water quality monitoring primarily focuses on water bodies in the natural environment, including surface water and groundwater. Surface water, such as rivers, lakes, and reservoirs, is a vital component of water resources and the primary source of water for human life and agricultural production. Groundwater, due to its concealment and relative stability, is a crucial source of drinking water in many regions. Monitoring these water bodies aims to understand their natural water quality and promptly identify and warn of potential water quality issues.

[0004] Pollution source monitoring focuses on various sources of water pollution generated by human activities, including but not limited to domestic sewage, hospital wastewater, various industrial wastewaters, agricultural runoff, primary rainwater (especially urban primary rainwater, which contains large amounts of surface sediments, oil, and other pollutants), and acid mine drainage. These pollution sources directly or indirectly affect water quality and are the main cause of water quality deterioration. By monitoring pollution sources, we can trace the source of pollution and provide a scientific basis for pollution control.

[0005] To obtain accurate water quality data, effective sampling devices are essential for collecting water samples. While simple tools like mineral water bottles and buckets can be used to collect water, they are inadequate for professional monitoring. These simple tools typically only collect water from shallow layers near the surface, where pollution levels and distribution vary with depth.

[0006] For example, harmful substances such as heavy metals and organic pollutants may form specific vertical distribution patterns in water bodies due to factors such as density and solubility. Certain pollutants may be more likely to settle at the bottom of the water, while others may float near the surface due to buoyancy. Furthermore, physical and chemical parameters such as water temperature, dissolved oxygen content, and pH value also vary with depth. Therefore, relying solely on shallow water samples for monitoring is likely to lead to data bias and fail to truly reflect the pollution status of the entire water body, thereby affecting subsequent environmental assessments and decision-making. Summary of the Invention

[0007] In view of the technical problems of the prior art, the present invention provides a water sampling device.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] A water sampling device comprises: a sealed shell, a sample box, and a trigger device; a accommodating cavity for accommodating the sample box is provided in the sealed shell; an airtight cavity is also provided in the sealed shell; the trigger device comprises an airtight plate and a spring; the spring is arranged in the airtight cavity; the spring is connected to the airtight plate so that the airtight plate can slide relative to the airtight cavity; a sampling hole is provided in the airtight cavity; the sampling hole is connected to the sample box; when the airtight plate passes through the sampling hole, water can flow into the sample box through the sampling hole.

[0010] Furthermore, the trigger device also includes an adjustment structure; the adjustment structure is arranged in the airtight cavity; the adjustment structure includes a limit plate and a knob; the limit plate and the airtight plate are respectively arranged at both ends of the spring; the knob is transmission-connected to the limit plate; when the knob rotates, the limit plate can move closer to or away from the airtight plate.

[0011] Furthermore, the adjustment structure also includes an adjusting rod and a screw; the adjusting rod is fixedly connected to the inner wall of the airtight chamber; the adjusting rod passes through the spring; the limit plate is slidably mounted on the adjusting rod; the screw extends into the adjusting rod; one end of the screw is screwed to the limit plate, and the other end is fixedly connected to the knob.

[0012] Furthermore, it also includes a restriction structure; the restriction structure is connected to the inner wall of the airtight cavity; the restriction structure corresponds to the sampling hole; when the airtight plate abuts against the restriction structure, the restriction structure can block the sampling hole.

[0013] Furthermore, the sampling hole includes a limiting portion; the limiting portion is connected to the airtight chamber; the limiting portion is conical; the limiting structure includes a transmission plate and a blocking protrusion; the transmission plate is slidably connected to the inner wall of the airtight chamber; the blocking protrusion is fixedly arranged at one end of the transmission plate; the blocking protrusion is conical in shape corresponding to the limiting portion.

[0014] Furthermore, a groove corresponding to the transmission plate is opened in the airtight cavity; the transmission plate is slidably embedded in the groove; and a reset spring is provided between the transmission plate and the groove.

[0015] Furthermore, the transmission plate includes a trigger plate and a connecting plate; one end of the connecting plate is connected to the trigger plate, and the other end is connected to the blocking protrusion; the surfaces of the connecting plate and the blocking protrusion are flush with the inner wall of the airtight cavity; a trigger slope is provided on the trigger plate; the trigger slope extends into the airtight cavity.

[0016] Furthermore, a sampling check valve and an exhaust check valve are provided in the sample box; the sampling check valve is connected to the sample box; the sampling check valve corresponds to the sampling hole; the exhaust check valve is connected to the sample box; a hose is provided on the exhaust check valve that passes through the sealed shell.

[0017] Furthermore, a sealing cover is provided on the sealing shell; the sealing cover is screwed onto the sealing shell; and the sealing cover corresponds to the sample box.

[0018] Furthermore, a hook ring is fixedly provided on the sealing cover; there are multiple hook rings; and the hook rings are arranged along the circumference of the sealing cover.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] During actual operation, the device can be directly put into water, and as the water depth gradually increases, the water pressure on the device gradually increases. Thus, the water pressure is used to push the airtight plate. When the airtight plate begins to slide, the spring is gradually compressed, which gradually increases the water pressure required to push the airtight plate. Through the aforementioned dynamic process, when the airtight plate slides to a certain stroke, it indicates that the water pressure has reached a certain level, corresponding to a certain water depth. In the current state, water can enter the sample box through the sampling hole. As the water depth continues to increase, the airtight plate will block the sampling hole through the limiting structure, thereby stopping sampling. In summary, through the aforementioned process, the present invention can effectively sample water bodies within a specific water depth range, thereby effectively avoiding problems such as only obtaining surface water, causing distortion of data results, and so on.

[0021] During actual operation, the device only needs to be put into water so that it can pass through the water layer of the required depth. No other operation and control are required, which greatly facilitates the sampling operation.

[0022] To adjust the sampling depth, the knob is rotated to adjust the relative distance between the limit plate and the airtight plate, causing the spring to accumulate or release its elastic force in advance, thereby increasing or decreasing the water pressure required to push the airtight plate to the specified stroke. This allows the sampling depth of the device to be adjusted.

[0023] During actual operation, the sampling depth can be adjusted simply by rotating the knob, without any other operation or assistance from other equipment, which greatly facilitates the adjustment operation and reduces the difficulty of operating the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 : Overall structure diagram.

[0025] Figure 2 : Overall cross-sectional structure diagram.

[0026] Figure 3 : Overall structure diagram of the trigger device.

[0027] Figure 4 : Cross-sectional view of the trigger device.

[0028] Figure 5 : Cross-section of the sampling hole.

[0029] Figure 6 : Schematic diagram of the sampling hole blocking status.

[0030] Figure 7 : Bottom view of the overall structure.

[0031] Figure 8 : Top view of the overall structure.

[0032] In the figure: 1. Sealed shell; 2. Sample box; 3. Trigger device; 11. Accommodating chamber; 12. Airtight chamber; 121. Sampling hole; 21. Sampling check valve; 22. Exhaust check valve; 31. Airtight plate; 32. Spring; 33. Adjustment structure; 1211. Restriction part; 1212. Flow part; 331. Limiting plate; 332. Knob; 333. Adjustment rod; 1213. Connecting part; 13. Sealing cover; 334. Screw; 4. Restriction structure; 41. Transmission plate; 42. Blocking protrusion; 411. Trigger plate; 412. Connecting plate. DETAILED DESCRIPTION

[0033] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0034] A water sampling device includes: a sealed housing 1, a sample box 2, and a trigger device 3. The sample box 2 is a plastic box for accommodating water samples. A sampling check valve 21 and an exhaust check valve 22 are provided in the sample box 2. The sampling check valve 21 is connected to the sample box 2. Under the restriction of the sampling check valve 21, external substances can enter the sample box 2 but cannot be discharged from the sample box 2. The exhaust check valve 22 is connected to the sample box 2. A hose is provided on the exhaust check valve 22. Under the restriction of the exhaust check valve 22, substances in the sample box 2 can be discharged from the sample box 2 but cannot enter the sample box 2.

[0035] A accommodating chamber 11 and an airtight chamber 12 are provided in the sealed shell 1. The accommodating chamber 11 and the airtight chamber 12 are isolated from each other. A sealing cover 13 is also provided on the sealed shell 1. The sealing cover 13 is screwed onto the sealed shell 1. When the sealing cover 13 is removed, the accommodating chamber 11 can be opened, so that the sample box 2 can be placed in the accommodating chamber 11. After the sample box 2 is placed in the accommodating chamber 11, the sample box 2 is sleeved on the outer wall of the airtight chamber 12. On the other hand, a through hole corresponding to the hose of the exhaust check valve 22 is provided on the sealing cover 13. In this way, the hose can pass through the sealed shell 1. At the same time, a hook ring for connecting a hook lock is provided on the sealing cover 13.

[0036] On the other hand, a sampling hole 121 is provided in the airtight chamber 12. The sampling hole 121 passes through the airtight chamber 12. The sampling hole 121 corresponds to the sampling check valve 21, thereby being connected to the sample box 2. Specifically, the sampling hole 121 includes a restricting portion 1211, a circulating portion 1212, and a connecting portion 1213. The circulating portion 1212 is arranged between the restricting portion 1211 and the connecting portion 1213. One end of the circulating portion 1212 is connected to the restricting portion 1211, and the other end is connected to the connecting portion 1213. The connecting portion 1213 corresponds to the sampling check valve 21. At the same time, the restricting portion 1211 is conical.

[0037] Secondly, the sealed housing 1 is provided with a through hole, which is in communication with the airtight chamber 12 , so that water can enter the airtight chamber 12 through the through hole and finally enter the sample box 2 through the sampling hole 121 .

[0038] The trigger device 3 includes an airtight plate 31, a spring 32, and an adjusting structure 33. The spring 32, the airtight plate 31, and the adjusting structure 33 are arranged in the airtight chamber 12. The adjusting structure 33 includes a limit plate 331, a knob 332, an adjusting rod 333, and a screw 334. A hook is fixedly provided on the knob 332. The adjusting rod 333 is fixedly connected to the inner wall of the airtight chamber 12. The adjusting rod 333 passes through the spring 32. The limit plate 331 and the airtight plate 31 are slidably mounted on the adjusting rod 333. The limit plate 331 and the airtight plate 31 are respectively arranged at both ends of the spring 32. One end of the spring 32 is in contact with the limit plate 331, and the other end is fixedly connected to the airtight plate 31. The screw 334 extends into the adjusting rod 333. One end of the screw 334 is screwed to the limit plate 331, and the other end is fixedly connected to the knob 332. Correspondingly, the limiting plate 331 is provided with a plate for screwing with the screw 334. At the same time, a through groove corresponding to the movement path of the limiting plate 331 is provided on the adjusting rod 333, so that the limiting plate 331 can slide normally along the adjusting rod 333. On the other hand, at the end of the through groove, a protrusion is fixedly provided on the adjusting rod 333 to limit the movement range of the airtight plate 31, to prevent the movement range of the airtight plate 31 from intersecting with the movement range of the limiting plate 331, thereby affecting the airtightness of the airtight chamber 12. It is worth noting that the diameter of the through hole on the sealing shell 1 is smaller than the diameter of the airtight plate 31, so as to limit the airtight plate 31.

[0039] The limiting structure 4 is connected to the inner wall of the airtight chamber 12. The limiting structure 4 corresponds to the sampling hole 121. When the airtight plate 31 abuts against the limiting structure 4, the limiting structure 4 can block the sampling hole 121. Specifically, the limiting structure 4 includes a transmission plate 41 and a blocking protrusion 42. The blocking protrusion 42 is conical in shape corresponding to the limiting portion 1211. A groove corresponding to the transmission plate 41 is provided in the airtight chamber 12. The transmission plate 41 can be slidably embedded in the groove. A return spring is provided between the transmission plate 41 and the groove. In this way, the transmission plate 41 can be slidably connected to the inner wall of the airtight chamber 12. The transmission plate 41 includes a trigger plate 411 and a connecting plate 412. One end of the connecting plate 412 is connected to the trigger plate 411, and the other end is connected to the blocking protrusion 42. The surfaces of the connecting plate 412 and the blocking protrusion 42 are flush with the inner wall of the airtight chamber 12. A triggering inclined surface is provided on the trigger plate 411. The triggering inclined surface extends into the airtight cavity 12. At the same time, when the airtight plate 31 moves to abut against the bump on the adjustment rod 333, the airtight plate 31 abuts against the triggering inclined surface.

[0040] In actual use, the hook lock is pre-attached to the hook ring of the sealing cover 13. The device is then immersed in water. Once submerged, since the airtight chamber 12 is filled with air and water can only enter through the through-holes in the sealing housing 1, both sides of the airtight plate 31 are affected by the elastic force of the spring 32 and the water pressure, respectively. The water pressure and the elastic force of the spring 32 form a counteraction at the airtight plate 31.

[0041] As the device gradually sinks, the water pressure it is subjected to will become greater and greater. Eventually, the effect of the water pressure on the airtight plate 31 is greater than the elastic force of the spring 32. Thus, driven by the water pressure, the airtight plate 31 gradually slides toward the inside of the airtight chamber 12. During the sliding of the airtight plate 31, the air inside the airtight chamber 12 is gradually squeezed, thereby entering the sample box 2 through the sampling hole 121 and the sampling check valve 21. The air in the sample box 2 is then discharged from the device through the exhaust check valve 22. As the airtight plate 31 gradually slides, the spring 32 is also gradually compressed, thereby accumulating greater elastic force, and the water pressure and elastic force form dynamic changes on both sides of the airtight plate 31. However, as the underwater depth increases, the water pressure will always gradually increase, thereby pushing the airtight plate 31 to continue sliding.

[0042] When the airtight plate 31 slides to the connecting plate 412, the water pressure has reached a specific value, corresponding to a specific water depth. At this time, because the blocking protrusion 42, the connecting plate 412 and the inner wall of the airtight chamber 12 are in a level state, the blocking protrusion 42 and the connecting plate 412 will not interfere with the sliding of the airtight plate 31. At this time, water has entered the sampling hole 121 in the airtight chamber 12 along with the airtight plate 31. The water then enters the sample box 2 through the sampling hole 121 and the sampling check valve 21. As the water gradually enters the sample box 2, the air in the sample box 2 is gradually discharged through the exhaust check valve 22. In this way, the normal entry of water is maintained.

[0043] As the device continues to sink, the water pressure continues to increase, thereby continuing to push the airtight plate 31 to slide into the airtight chamber 12. When the airtight plate 31 moves to the bump on the adjustment rod 333, it is restricted by the bump and cannot continue to slide even if the water pressure continues to increase. At this time, the airtight plate 31 fits against the triggering bevel on the trigger plate 411, thereby pushing the trigger plate 411 to slide. Then, driven by the trigger plate 411, the connecting plate 412 drives the blocking protrusion 42 to slide, so that the blocking protrusion 42 is completely embedded in the restriction portion 1211, thereby blocking the restriction portion 1211. At this time, water can no longer enter the sample box 2 through the sampling hole 121. When the device is recovered, as the water depth gradually decreases, the water pressure also decreases, and the airtight plate 31 will gradually return to its initial position under the action of the elastic force of the spring 32. At this time, the water in the sample box 2 is restricted by the sampling check valve 21 and will not flow out of the sample box 2. In this way, the sampling of the water body is completed.

[0044] In summary, through the aforementioned process, the device only performs sampling when the water pressure reaches a specific value, that is, when the water depth reaches a specific depth, thereby completing the sampling of water bodies at a specific depth. In actual operation, the device can be directly placed in the water to ensure that it can pass through the water layer of the required depth, without the need for additional control and operation.

[0045] When it is necessary to sample deeper water bodies, the knob 332 can be rotated, and the screw 334 can be rotated under the drive of the knob 332, thereby driving the limit plate 331 to slide relative to the airtight plate 31, so that the spring 32 accumulates a greater elastic force in advance, and the stroke required for the airtight plate 31 to move to the connecting plate 412 is fixed, so it takes a greater water pressure to push the airtight plate 31 to the connecting plate 412, corresponding to a deeper water depth. In this way, deeper water bodies can be sampled. Conversely, if it is necessary to sample shallower water bodies, the knob 332 can be rotated in the opposite direction so that the spring 32 releases the elastic force in advance to correspond to the shallower water pressure. Thus, by rotating the knob 332, the sampling depth of the device can be adjusted, and the adjustment process is simple and convenient.

[0046] After the device is lifted up, the sealing cover 13 can be unscrewed to remove the internal sample box 2 and obtain the sample in the sample box 2. Preferably, a corresponding cover can also be provided on the sample box 2 to facilitate the removal of the water sample in the sample box 2 or the cleaning of the sample box 2.

[0047] Preferably, a counterweight of a certain weight can be hung on the hook on the knob 332 to make the device sink into the water more smoothly and maintain the device in a vertical state in the water, thereby avoiding unnecessary sampling errors.

[0048] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A water sampling device, characterized in that: include: Sealed housing (1), sample box (2), trigger device (3); The sealed housing (1) is provided with a receiving cavity (11) for receiving the sample box (2); An airtight cavity (12) is also provided in the sealed housing (1); The trigger device (3) comprises an airtight plate (31) and a spring (32); The spring (32) is arranged in the airtight chamber (12); The spring (32) is connected to the airtight plate (31) so that the airtight plate (31) can slide relative to the airtight chamber (12); A sampling hole (121) is provided in the airtight cavity (12); The sampling hole (121) is connected to the sample box (2); When the airtight plate (31) passes through the sampling hole (121), water can flow into the sample box (2) through the sampling hole (121).

2. A water sampling device according to claim 1, characterized in that: The trigger device (3) further includes an adjustment structure (33); The regulating structure (33) is arranged in the airtight cavity (12); The adjustment structure (33) includes a limiting plate (331) and a knob (332); The limiting plate (331) and the airtight plate (31) are respectively arranged at two ends of the spring (32); The knob (332) is in transmission connection with the limiting plate (331); When the knob (332) is rotated, the limiting plate (331) can move closer to or farther away from the airtight plate (31).

3. A water sampling device according to claim 2, characterized in that: The adjustment structure (33) further includes an adjustment rod (333) and a screw rod (334); The adjusting rod (333) is fixedly connected to the inner wall of the airtight chamber (12); The adjusting rod (333) passes through the spring (32); The limiting plate (331) is slidably mounted on the adjusting rod (333); The screw rod (334) extends into the adjusting rod (333); One end of the screw rod (334) is screwed to the limiting plate (331), and the other end is fixedly connected to the knob (332).

4. A water sampling device according to claim 1, characterized in that: It also includes the restriction structure (4); The limiting structure (4) is connected to the inner wall of the airtight cavity (12); The restriction structure (4) corresponds to the sampling hole (121); When the airtight plate (31) abuts against the limiting structure (4), the limiting structure (4) can block the sampling hole (121).

5. A water sampling device according to claim 4, characterized in that: The sampling hole (121) includes a restriction portion (1211); The limiting portion (1211) is in communication with the airtight chamber (12); The limiting portion (1211) is conical; The limiting structure (4) includes a transmission plate (41) and a blocking protrusion (42); The transmission plate (41) is slidably connected to the inner wall of the airtight chamber (12); The blocking protrusion (42) is fixedly arranged on one end of the transmission plate (41); The blocking protrusion (42) is in a conical shape corresponding to the limiting portion (1211).

6. A water sampling device according to claim 5, characterized in that: A groove corresponding to the transmission plate (41) is provided in the airtight cavity (12); The transmission plate (41) is slidably embedded in the groove; A return spring is provided between the transmission plate (41) and the groove.

7. The water sampling device according to claim 5, characterized in that: The transmission plate (41) includes a trigger plate (411) and a connecting plate (412); One end of the connecting plate (412) is connected to the trigger plate (411), and the other end is connected to the blocking protrusion (42); The surfaces of the connecting plate (412) and the blocking protrusion (42) are flush with the inner wall of the airtight cavity (12); The trigger plate (411) is provided with a trigger slope; The trigger slope extends into the airtight cavity (12).

8. A water sampling device according to any one of claims 1 to 8, characterized in that: The sample box (2) is provided with a sampling check valve (21) and an exhaust check valve (22); The sampling check valve (21) is connected to the sample box (2); The sampling check valve (21) corresponds to the sampling hole (121); The exhaust check valve (22) is connected to the sample box (2); The exhaust check valve (22) is provided with a hose that passes through the sealed housing (1).

9. A water sampling device according to any one of claims 1 to 8, characterized in that: The sealed housing (1) is further provided with a sealing cover (13); The sealing cover (13) is screwed onto the sealing housing (1); The sealing cover (13) corresponds to the sample box (2).

10. The water sampling device according to claim 9, characterized in that: The sealing cover (13) is also fixedly provided with a hook ring; The number of the hooks and loops is multiple; The hooks and rings are arranged along the circumference of the sealing cover (13).

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