Sewage treatment sampling device

Abstract

A sewage treatment sampling device belongs to the technical field of liquid sampling devices, and comprises: a sampling tube, the bottom of which is provided with a balancing weight, and the side wall of the upper end of the sampling tube is provided with a liquid inlet hole; the sealing ring is arranged in the sampling tube, and the top of the sealing ring is connected with the top cover through a spring; the sleeve comprises an inner pipe sleeve arranged outside the sampling pipe in a sleeving manner, the inner pipe sleeve is movably arranged between the two ends of the sampling pipe in a sleeving manner, and outer pipe sleeves are arranged outside the inner pipe sleeve at intervals; a through hole is formed in the bottom of the sleeve, and a one-way valve plate is arranged above the through hole; the lower end of the pull rope is connected with the sealing ring; the sewage treatment sampling device is suspended in the air by using the pull rope, when the interior of the sampling pipe is in an unloaded state, the sealing ring is positioned below the liquid inlet hole, and when the interior of the sampling pipe is filled with liquid, the sealing ring seals the inner side of the liquid inlet hole; and when the sleeve is positioned at the upper end of the sampling tube, the inner tube sleeve seals the outer side of the liquid inlet hole. The scheme is simple in overall structure, the load of the unmanned aerial vehicle can be effectively reduced, and the sampling process is convenient to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid sampling devices, and in particular relates to a sewage treatment sampling device. Background Art

[0002] Water pollution poses a serious threat to the environment and human health. Polluted water not only destroys the habitat of aquatic organisms, but also enters the human body through drinking water and the food chain, causing health problems. Common water pollutants include heavy metals, organic matter, nutrients such as nitrogen and phosphorus, chemicals and microorganisms, etc. Water pollution can cause eutrophication of water bodies, leading to the rampant growth of algae in the water body, causing fish deaths and affecting the aquatic ecosystem. As society pays more and more attention to environmental issues, it is urgent to systematically promote water pollution prevention and control, water ecological protection and water resources management. Efficient and comprehensive acquisition of water quality information is a prerequisite for water pollution prevention and control, and water quality sampling is the first link in sewage treatment.

[0003] At present, most of the sampling work is done manually with handheld sampling bottles. The disadvantages of manual sampling are: high cost, low efficiency, time-consuming and labor-intensive; it cannot adapt to complex and unfamiliar environments, especially in environments with large water areas. Sampling personnel are required to take a ship-like transportation tool to the middle of the water area to collect water samples, which is not only time-consuming and labor-intensive but also dangerous.

[0004] There are devices for sewage sampling using drones in the prior art. For example, the patent with application number 202110463334.2 discloses a drone for sampling polluted water bodies. The scheme includes a sampling drone body. The lower surface of the sampling drone body is installed with a sampling adjustment mechanism located inside the supporting legs. A water sampling mechanism is arranged at the sampling adjustment mechanism position. The water sampling mechanism includes a sampling protection outer cylinder. The inner wall of the sampling protection outer cylinder is rotatably connected to a sampling protection inner cylinder near the lower position. The inner wall of the sampling protection outer cylinder is located below the sampling protection inner cylinder and is fixedly connected to a bottom partition. However, the overall structure of the scheme is relatively complex, and the drone carries more equipment, which places high requirements on the load capacity of the drone itself and the operator's proficiency. Summary of the invention

[0005] In order to solve the shortcomings of the prior art, the present invention provides a sewage treatment sampling device with a simple overall structure, which can effectively reduce the load of the drone, and the sampling process is easy to operate, which can effectively reduce the skill requirements for the operator.

[0006] In order to achieve the purpose of the present invention, the following scheme is proposed: A sewage treatment sampling device, comprising: The sampling tube has a counterweight at the bottom, a top cover at the top, and a liquid inlet hole at the side wall of the upper end of the sampling tube; The sealing ring is an annular structure and is coaxially arranged inside the sampling tube. The sealing ring is arranged to move along the axis relative to the sampling tube, and the top of the sealing ring is connected to the top cover through a spring; The sleeve comprises an inner sleeve sleeved on the outside of the sampling tube, the inner sleeve sleeve is movably arranged between the two ends of the sampling tube, an outer sleeve sleeve is arranged outside the inner sleeve sleeve, and the bottom of the inner sleeve sleeve and the outer sleeve sleeve are sealed and connected through a bottom plate; a through hole is opened on the bottom plate, and a one-way valve plate is arranged on the top surface of the bottom plate corresponding to the through hole, and when the bottom surface of the one-way valve plate is in contact with the top surface of the bottom plate, the through hole is in a closed state; A pull rope, the lower end of which is connected to the sealing ring and passes through the top cover; the sewage treatment sampling device is suspended in the air by using the pull rope, when the interior of the sampling tube is in an empty state, the sealing ring is located below the liquid inlet hole, and when the interior of the sampling tube is filled with liquid, the sealing ring seals the inner side of the liquid inlet hole; when the sleeve is at the upper end of the sampling tube, the inner sleeve seals the outer side of the liquid inlet hole.

[0007] The beneficial effect of the present invention is that the present invention can be mounted on a drone via a pull rope, and the drone only needs to be equipped with a motor winch to operate the device for sewage sampling, which not only makes the sampling operation simple, but also can effectively reduce the load of the drone. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.

[0009] Figure 1 A schematic diagram of a usage state of the sampling device of the present application is shown.

[0010] Figure 2 A schematic diagram of the external structure of the present application is shown.

[0011] Figure 3 A cross-sectional view of the structure of the present application is shown.

[0012] Figure 4 Shows Figure 3 A partial enlarged view of point A in the middle.

[0013] Figure 5 A cross-sectional view of the present application when it is lowered into water is shown.

[0014] Figure 6 A cross-sectional view of the application in the ascending state after sampling is completed is shown.

[0015] Markings in the figure: sampling tube-1, liquid inlet hole-11, push rod-12, counterweight-2, top cover-3, sealing ring-4, spring-41, sleeve-5, inner sleeve-51, outer sleeve-52, bottom plate-53, through hole-531, one-way valve plate-54, pull rope-6. DETAILED DESCRIPTION

[0016] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the implementation modes of the present invention are described in detail below with reference to the accompanying drawings. However, the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] like Figures 2 to 6 As shown, a sewage treatment sampling device includes: a sampling tube 1, a sealing ring 4 and a sleeve 5.

[0018] A counterweight block 2 is provided at the bottom of the sampling tube 1 , a top cover 3 is provided at the top of the sampling tube 1 , and a liquid inlet hole 11 is provided on the side wall at the upper end of the sampling tube 1 .

[0019] The sealing ring 4 is an annular structure and is coaxially arranged inside the sampling tube 1 . The sealing ring 4 is arranged to move along the axis relative to the sampling tube 1 . The top of the sealing ring 4 is connected to the top cover 3 via a spring 41 .

[0020] The sleeve 5 includes an inner sleeve 51 sleeved on the outside of the sampling tube 1. The inner sleeve 51 is movably arranged between the two ends of the sampling tube 1. Specifically, limit bolts or limit blocks can be provided at the upper end and the lower end of the sampling tube 1 to limit the movement range of the inner sleeve 51 to prevent the sleeve 5 from separating from the sampling tube 1. An outer sleeve 52 is provided on the outside of the inner sleeve 51. The bottom of the inner sleeve 51 and the outer sleeve 52 are sealed and connected by a bottom plate 53; the bottom plate 53 is provided with a through hole 531, and a one-way valve plate 54 is provided on the top surface of the bottom plate 53 corresponding to the through hole 531. When the bottom surface of the one-way valve plate 54 is in contact with the top surface of the bottom plate 53, the through hole 531 is in a closed state.

[0021] The lower end of the pull rope 6 is connected to the sealing ring 4 and passes through the top cover 3; the pull rope 6 can be used to suspend the sewage treatment sampling device in the air. When the sampling tube 1 is in an unloaded state, the sealing ring 4 is located below the liquid inlet 11. At this time, the spring 41 is in a compressed state. Under the action of gravity, the sleeve 5 will be at the lower end of the sampling tube 1. When the sampling tube 1 is filled with liquid, the sealing ring 4 closes the inner side of the liquid inlet 11. At this time, the spring 41 will be further compressed; when the sleeve 5 is at the upper end of the sampling tube 1, the inner sleeve 51 closes the outer side of the liquid inlet 11.

[0022] The above scheme has a simple overall structure, the sampling process is easy to operate, and it can effectively prevent sample leakage and dilution. The principle of sampling using the above scheme is as follows: put the sewage treatment sampling device into the water, and the device will automatically and gently sink into the water under the action of its own weight. The counterweight block 2 can not only increase the device's descent potential, but also because it is located at the lower end of the sampling tube 1, it can also keep the sampling tube 1 in a vertical state. Sampling is mainly divided into the following three stages: The first stage: descending in the water. When the sampling device is in the air, the sleeve 5 will be at the lower end of the sampling tube 1. When the sampling device just enters the water, the sleeve 5 will rise relative to the sampling tube 1 under the buoyancy of the water. Figure 5 As shown, when the sleeve 5 rises to the limit position of the upper end of the sampling tube 1, the inner sleeve 51 closes the outer side of the liquid inlet 11 to prevent the water surface and impurities in the water from blocking the liquid inlet 11 during the descent process. The sampling tube 1 will drive the sleeve 5 to move downward. At this time, the one-way valve plate 54 is pushed upward by the water pressure, allowing water to enter the annular chamber between the inner sleeve 51 and the outer sleeve 52 through the through hole 531 to reduce the resistance of the sampling device to descend. Finally, the sleeve 5 and the sampling tube 1 will be completely submerged in water. Because the flow rate of the through hole 531 is limited, the descent speed of the sampling device can be effectively controlled, so that the sampling device descends smoothly. During the descent process, the pull rope 6 does not generate an upward pulling force on the sampling device. The second stage: liquid sampling. When the sampling device descends to a predetermined depth, or to the length limit of the pull rope 6, the sampling device will stop descending. It can be understood here that the sampling depth of sewage can be effectively controlled by controlling the length of the pull rope 6. When the sampling device descends to a predetermined depth, the pull rope 6 is pulled upward by a predetermined distance. When the pull rope 6 is pulled upward, the sampling tube 1 is driven upward by the spring 41. Because the sleeve 5 is filled with liquid at this time, and the one-way valve plate 54 closes the through hole 531, the sleeve 5 will not immediately rise with the sampling tube 1, so that the sampling tube 1 can move upward relative to the sleeve 5. Figure 3 As shown, the outer side of the liquid inlet 11 is opened, because when the pull rope 6 is pulled, the interior of the sampling tube 1 is in an unloaded state, and the entire device is suspended in the water. Therefore, at this time, the pulling force required by the pull rope 6 to overcome the upward resistance of the sampling device is not sufficient to compress the spring 41 and make the sealing ring 4 close the inner side of the liquid inlet 11. Therefore, when the outer side of the liquid inlet 11 is opened, the liquid can enter the interior of the sampling tube 1 through the liquid inlet 11, thereby achieving the purpose of sampling. During this process, the sleeve 5 may be at any position in the middle of the sampling tube 1, or it may drop to the extreme position at the lower end of the sampling tube 1.

[0023] The third stage: lifting the sampling tube 1, such as Figure 6As shown, when enough liquid enters the sampling tube 1, the tension on the pull rope 6 will increase. At this time, the pull rope 6 is continued to be pulled upward, and the tension on the pull rope 6 will be greater than the total weight of the sampling tube 1, the counterweight 2 and the sleeve 5. Therefore, when the sampling tube 1 completes sampling, the pull rope 6 is pulled upward again. At this time, the resistance that the pull rope 6 has to overcome will be much greater than the weight of the sampling device itself, so the spring 41 can be further compressed so that the sealing ring 4 can seal the inner side of the liquid inlet 11 to prevent the liquid from entering the sampling tube 1 from above during the rising process, and to prevent the liquid inside the sampling tube 1 from leaking. The sampling device is pulled out of the water as a whole using the pull rope 6 to complete the sewage sampling work; after the sampling is completed, the tension of the pull rope 6 is released, and the sealing ring 4 can automatically open the liquid inlet 11 under the action of the spring 41, and the sample liquid can be poured out through the liquid inlet 11 or by opening the top cover 3; during the rising process of the sampling tube 1, the sleeve 5 will be at the lower end of the sampling tube 1.

[0024] Preferably, Figure 3 As shown, the tops of the inner tube sleeve 51 and the outer tube sleeve 52 are open structures to facilitate the discharge of air between the inner tube sleeve 51 and the outer tube sleeve 52 during the descent of the sampling device.

[0025] As another structure, the tops of the inner tube sleeve 51 and the outer tube sleeve 52 may be sealed, and exhaust holes may be opened at the tops to achieve the purpose of emptying and storing liquid.

[0026] Preferably, the length of the outer tube sleeve 52 is greater than or equal to the length of the sampling tube 1. When the sleeve 5 is at the extreme position of the lower end of the sampling tube 1, the upper edge of the outer tube sleeve 52 is located above the liquid inlet 11. This structure can effectively prevent floating objects on the water surface, aquatic plants and impurities in the water from entering or blocking the liquid inlet 11.

[0027] Preferably, Figures 3 to 5 As shown, a push rod 12 is provided on the outer side of the lower end of the sampling tube 1, and its outer diameter is smaller than the inner diameter of the through hole 531. When the sleeve 5 moves to the lower end of the sampling tube 1, the push rod 12 pushes the one-way valve plate 54 upward. Through this structural design, when the sampling tube 1 is lifted in the third stage, after the sampling device leaves the liquid surface, the push rod 12 is used to push the one-way valve plate 54 upward, so that the through hole 531 is always in an open state, thereby discharging the liquid inside the sleeve 5 and reducing the load on the pull rope 6 after the sampling device leaves the liquid surface; after designing the push rod 12, even if the through hole 531 is in an open state, during the third stage when the sampling tube 1 rises in the water, the sleeve 5 can still maintain the load on the pull rope 6 to prevent the spring 41 from stretching.

[0028] Preferably, the sampling tube 1, the sealing ring 4 and the inner tube sleeve 51 are all circular tube structures for ease of manufacture and storage.

[0029] Preferably, a plurality of liquid inlet holes 11 are arranged in a circumferential array to improve sampling efficiency.

[0030] Preferably, Figure 1 As shown, the upper end of the pull rope 6 is connected to the bottom of a drone to accommodate a wider sampling area. The drone is provided with an electric winch for winding or releasing the pull rope 6.

[0031] The above description is only a preferred embodiment of the present invention, and is not intended to be the only one or to limit the present invention. Those skilled in the art should understand that various changes or equivalent substitutions made to the present invention without departing from the scope of the present invention are within the scope of protection of the present invention.

Claims

1. A sewage treatment sampling device, characterized in that: include: A sampling tube (1) having a counterweight (2) at its bottom, a top cover (3) at its top, and a liquid inlet hole (11) at the side wall of the upper end of the sampling tube (1); The sealing ring (4) is an annular structure and is coaxially arranged inside the sampling tube (1). The sealing ring (4) is arranged to move along the axis relative to the sampling tube (1). The top of the sealing ring (4) is connected to the top cover (3) via a spring (41). The sleeve (5) comprises an inner sleeve (51) sleeved on the outside of the sampling tube (1); the inner sleeve (51) is movably arranged between the two ends of the sampling tube (1); an outer sleeve (52) is arranged outside the inner sleeve (51); the inner sleeve (51) and the outer sleeve (52) are sealed and connected at the bottom via a bottom plate (53); a through hole (531) is formed on the bottom plate (53); a one-way valve plate (54) is arranged on the top surface of the bottom plate (53) corresponding to the top of the through hole (531); when the bottom surface of the one-way valve plate (54) is in contact with the top surface of the bottom plate (53), the through hole (531) is in a closed state; A pull rope (6) is connected at its lower end to the sealing ring (4) and passes through the top cover (3); the sewage treatment sampling device is suspended in the air by means of the pull rope (6); when the interior of the sampling tube (1) is in an empty state, the sealing ring (4) is located below the liquid inlet hole (11); when the interior of the sampling tube (1) is filled with liquid, the sealing ring (4) seals the inner side of the liquid inlet hole (11); when the sleeve (5) is at the upper end of the sampling tube (1), the inner sleeve (51) seals the outer side of the liquid inlet hole (11).

2. A sewage treatment sampling device according to claim 1, characterized in that: The tops of the inner tube sleeve (51) and the outer tube sleeve (52) are open structures.

3. A sewage treatment sampling device according to claim 1 or 2, characterized in that: The length of the outer tube sleeve (52) is greater than or equal to the length of the sampling tube (1), and when the sleeve (5) is at the extreme position of the lower end of the sampling tube (1), the upper edge of the outer tube sleeve (52) is located above the liquid inlet hole (11).

4. A sewage treatment sampling device according to claim 1, characterized in that: A push rod (12) is provided on the outer side of the lower end of the sampling tube (1), and its outer diameter is smaller than the inner diameter of the through hole (531). When the sleeve (5) moves to the lower end of the sampling tube (1), the push rod (12) pushes the one-way valve plate (54) upwards.

5. A sewage treatment sampling device according to claim 1, characterized in that: The sampling tube (1), the sealing ring (4) and the inner tube sleeve (51) are all circular tube structures.

6. A sewage treatment sampling device according to claim 1, characterized in that: A plurality of liquid inlet holes (11) are arranged in an array along the circumference.

7. A sewage treatment sampling device according to claim 1, characterized in that: The upper end of the pull rope (6) is connected to the bottom of a drone, and the drone is provided with an electric winch for winding or releasing the pull rope (6).

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