Sewage sampling device

Abstract

The invention relates to the technical field of water quality environment monitoring, and provides a sewage sampling device which comprises a floating part used for floating on a sewage surface; a guide rope for extending into sewage is arranged at the bottom of the floating part; the sampling barrel shell is arranged on the guide rope in a lifting sliding mode, a plugging piece capable of moving in a lifting mode is arranged on the sampling barrel shell in a sliding mode, a top plugging block is arranged at the upper end of the plugging piece, and a bottom plugging block is arranged at the lower end of the plugging piece. The top plugging block is used for plugging an upper opening of the sampling barrel shell, the bottom plugging block is used for plugging a lower opening of the sampling barrel shell, and the top plugging block is connected with a pull rope used for lifting the plugging piece to drive the sampling barrel shell to move upwards; the positioning block is connected to the lower end of the guide rope and used for sinking into the bottom of the sewage pool so as to anchor the floating piece through the guide rope. By means of the technical scheme, the technical problem that in the prior art, fixed-point multi-time sampling precision is insufficient is solved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of water quality environment monitoring, and in particular, to a sewage sampling device. Background Art

[0002] In fields such as environmental monitoring and sewage treatment, multiple, fixed-point sewage sampling is key to obtaining water quality data. As environmental protection requirements increase, higher requirements are placed on the accuracy and efficiency of sampling equipment. There are many ways to implement fixed-point multiple sampling. For example, in some scenarios, a robotic arm equipped with a sampling component is used for automated sampling, and the sampling position is controlled by a preset program. There is also the use of a fixed bracket to fix the sampling device to the target water area to achieve timed and fixed-point sampling. There is also the use of drones to mount sampling equipment and complete the sampling operation through remote control. However, these methods have certain limitations in practical applications. For example, robotic arm sampling requires a complex fixed base and is not suitable for fixed scenarios such as large monitoring stations, which lacks flexibility. Fixed brackets are limited by the installation environment and are difficult to adapt to changes in water terrain. Drone sampling is limited by load capacity and endurance, and its stability in complex water environments needs to be improved.

[0003] Therefore, in some small and medium-sized operation scenarios or temporary monitoring tasks, the method of manually throwing sampling buckets is still widely used, that is, the operator holds the sampling bucket and throws it into the target water area to take samples, and then throws it again after recovery. However, this method has significant problems. First, it is difficult for manual operation to control the throwing force and angle, resulting in a deviation between the landing point and the target position; second, environmental factors such as water flow and wind force can cause the sampling bucket to shift, especially under harsh conditions, and it is easy to deviate from the target area, resulting in inconsistent sampling positions multiple times. Insufficient position accuracy not only affects the consistency and accuracy of sample data, and cannot truly reflect changes in water quality, but also reduces sampling efficiency due to repeated adjustments to the position and re-sampling, wasting manpower and time costs. Therefore, in order to address the accuracy and efficiency problems of methods such as manual throwing of sampling buckets, improvements need to be made to the sewage sampling device. Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the present invention provides a sewage sampling device, which solves the technical problem in the prior art of insufficient sampling position accuracy due to manual operation deviation and environmental factors when taking multiple samples at a fixed point.

[0005] According to one aspect, at least one embodiment of the present invention provides a sewage sampling device, comprising: A floating member, the floating member is used to float on the sewage surface; a guide rope is provided at the bottom of the floating member for extending into the sewage; The sampling cylinder shell is lifted and slidably arranged on the guide rope, and a sealing piece that can be lifted and lowered is slidably provided on the sampling cylinder shell. The upper end of the sealing piece is provided with a top sealing block, and the lower end is provided with a bottom sealing block. The sealing piece is configured to rise along the sampling cylinder shell so that the top sealing block is blocked at the upper opening of the sampling cylinder shell and the bottom sealing block is blocked at the lower opening of the sampling cylinder shell. A pull rope for lifting the sealing piece to drive the sampling cylinder shell to move upward is connected to the top sealing block. A positioning block is connected to the lower end of the guide rope, and the positioning block is used to sink to the bottom of the sewage pool to provide anchoring for the floating member through the guide rope.

[0006] For example, at least one embodiment of the present disclosure provides a sewage sampling device, wherein a drainage plate is provided inside the sampling cylinder shell, which slides up and down, and the sealing member also has a push plate, which is located between the top sealing block and the bottom sealing block, and the diameters of the top sealing block, the push plate and the bottom sealing block increase successively, and a through hole is provided on the drainage plate, the diameter of the through hole is larger than the diameter of the top sealing block and smaller than the diameter of the push plate, and the sealing member is configured so that after rising and sliding, the top sealing block passes through the through hole, the push plate blocks the through hole and pushes the drainage plate up, so that sewage enters from the bottom of the sampling cylinder shell and fills the inner cavity of the sampling cylinder shell.

[0007] For example, at least one embodiment of the present disclosure provides a sewage sampling device, wherein the top of the sampling cylinder shell has a necked opening, and the inner wall of the sampling cylinder shell is provided with a circumferentially extending limit card, and the limit card is located at the lower end of the sampling cylinder shell, and the bottom surface of the limit card can abut against the top surface of the bottom blocking block to limit the upward movement range of the bottom blocking block.

[0008] For example, in at least one embodiment of the present disclosure, a sewage sampling device is provided, wherein mounting ears are provided on the periphery of the floating member, and the mounting ears are used to install a traction rope to pull the floating member.

[0009] For example, at least one embodiment of the present disclosure provides a sewage sampling device, wherein a winding drum is rotatably provided on the positioning block, the guide rope is wound on the winding drum, an elastic member is provided between the winding drum and the positioning block, and the elastic member drives the winding drum to reel in the guide rope to tighten the guide rope and keep the guide rope extending out of the winding drum in a vertical state.

[0010] For example, in at least one embodiment of the present disclosure, a sewage sampling device is provided, wherein a placement hole is formed through the floating member, and the placement hole is used for the sampling cartridge shell to pass through so as to limit the sampling cartridge shell to the guide rope.

[0011] For example, at least one embodiment of the present disclosure provides a sewage sampling device, wherein there are two guide ropes, and the two guide ropes are symmetrically arranged on both sides of the central axis of the floating member, and a first sliding sleeve is provided on both sides of the sampling tube shell. The two first sliding sleeves are arranged on the two guide ropes in a one-to-one corresponding manner, and are used to guide the sampling tube shell to move up and down along the guide ropes.

[0012] For example, at least one embodiment of the present disclosure provides a sewage sampling device, wherein a guide tube extending downward is provided at the bottom of the first sliding sleeve, the guide rope is passed through the guide tube and slides with the guide tube, and a second sliding sleeve is provided on both sides of the bottom sealing block, and the second sliding sleeve is slidably mounted on the guide tube.

[0013] For example, in at least one embodiment of the present disclosure, a sewage sampling device is provided, wherein a limit block is provided at the lower end of the guide tube, and the limit block is used to limit the downward movement range of the blocking member.

[0014] For example, at least one embodiment of the present disclosure provides a sewage sampling device, wherein the floating member is provided with a rotating shaft assembly, the rotating shaft assembly includes a rotating frame, a reel and a rotating drive member, the pull rope is wound around the reel, and the rotating drive member is wirelessly connected to a remote control, and the remote control is used to control the start and stop of the rotating drive member.

[0015] The beneficial effects of the embodiments of the present invention are: In the present invention, the anchoring system formed by connecting the floating part with the positioning block through the guide rope effectively solves the problem of position drift caused by water flow and wind force in the prior art when manually throwing the sampling bucket, ensuring that the sampling device can be accurately positioned above the target sampling point. The structural design of the sealing part with a relatively large weight enables it to drag the sampling shell to sink synchronously after the pull rope is loosened, and the upper and lower openings of the sampling shell remain open during the sinking process, ensuring that the sewage in the cylinder always keeps in circulation with the external sewage at the target depth, avoiding the problem of mixing of sewage at different depths and improving the accuracy of the sampling depth. The through structure of the sampling shell and the matching design of the sealing part make it possible to quickly close the upper and lower openings by pulling the pull rope after reaching the target depth, accurately intercepting the sewage sample at the target depth, and realizing the fixed-depth sampling function. The linkage design of the pull rope and the sealing part enables the operator to complete the entire sampling process by controlling the tightness of the pull rope. The operation is simple and the sampling depth can be accurately controlled, reducing manual operation errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments of the present invention. Obviously, the drawings described below are merely exemplary embodiments of the present invention. Those skilled in the art can, without inventive effort, derive other drawings based on the contents of the exemplary embodiments of the present invention and these drawings.

[0017] Figure 1 This is a schematic structural diagram of a sewage sampling device according to an embodiment of the present invention; Figure 2 for Figure 1 A structural diagram of another perspective of an embodiment of the present invention; Figure 3 for Figure 1 Schematic diagram of the structure of the sampling cylinder shell and the sealing member in the embodiment; Figure 4 for Figure 3 Schematic diagram of the internal structure; Figure 5 for Figure 3 Another internal structure diagram of; In the figure: 1. Floating part; 101. Mounting ear; 102. Placement hole; 2. Guide rope; 3. Sampling tube shell; 301. Limiting card platform; 4. Sealing part; 401. Top sealing block; 402. Bottom sealing block; 403. Push plate; 5. Positioning block; 6. Drain plate; 601. Through hole; 7. Winding drum; 9. Volute spring shaft assembly; 910. Rotating frame; 920. Rotating drive part; 10. Pull rope; 11. Counterweight block; 12. First sliding sleeve; 1201. Guide tube; 13. Second sliding sleeve; 14. Limiting block. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention.

[0019] To simplify the drawings, only portions relevant to the invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0020] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0021] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0022] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0023] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] like Figures 1 to 5As shown, a sewage sampling device in one embodiment of the present invention is shown, comprising a floating part 1, a guide rope 2, a sampling tube shell 3, a sealing part 4 and a positioning block 5. The floating part 1 is a plate-like structure, and the center position of its bottom is fixedly connected to the upper end of the guide rope 2. The guide rope 2 is a flexible rope body, and its lower end is fixedly connected to the positioning block 5. The positioning block 5 is a block structure with a density greater than the density of sewage, and can sink to the bottom of the sewage pool after the device is deployed. The sampling tube shell 3 is a cylindrical structure with openings at both ends, and is provided with a sliding sleeve that cooperates with the guide rope 2. The sliding sleeve is provided with a through hole for the guide rope 2 to pass through, so that the sampling tube shell 3 can be lifted and slid along the guide rope 2. The sealing part 4 is a columnar structure, and its outer wall slides with the inner wall of the sampling tube shell 3, and can be lifted and moved along the axial direction of the sampling tube shell 3. A top sealing block 401 is fixedly mounted on the upper end of the sealing member 4. Its outer diameter is larger than the inner diameter of the upper opening of the sampling tube housing 3. A bottom sealing block 402 is fixedly mounted on the lower end. Its outer diameter is larger than the inner diameter of the lower opening of the sampling tube housing 3. The lower end of the pull rope 10 is fixedly connected to the upper surface of the top sealing block 401, and the upper end extends through a through hole in the floating member 1 to the upper portion of the floating member 1.

[0025] When the device is in operation, the float 1 is first placed on the sewage surface at the target sampling point. The positioning block 5 is then driven downward by gravity to drive the guide rope 2 downward until the positioning block 5 contacts the bottom of the sewage pool and stabilizes. At this point, the guide rope 2 is straightened, anchoring the float 1 on the water surface. When sampling is required, the operator releases the pull rope 10 above the float 1. The sealing member 4 moves downward along the sampling tube shell 3 due to its own gravity until the top sealing block 401 and the bottom sealing block 402 are respectively separated from the upper and lower openings of the sampling tube shell 3. At this point, the inner cavity of the sampling tube shell 3 is connected to the external sewage through the upper and lower openings. Due to the heavy weight of the sealing member 4, it will drag the sampling tube shell 3 downward along the guide rope 2 during its sinking process. The target sampling depth is set by controlling the release length of the guide rope 2 until the target sampling depth is reached. During this process, the upper and lower openings of the sampling tube shell 3 remain open at all times, allowing the sewage inside the tube to maintain flow with the external sewage at the corresponding depth. When the sampling shell 3 reaches the target depth, the operator pulls the pull rope 10, which drives the sealing member 4 up along the sampling shell 3, causing the top sealing block 401 and the bottom sealing block 402 to respectively seal the upper and lower openings of the sampling shell 3, thereby sealing the sewage sample at the target depth within the sampling shell 3. Finally, the pull rope 10 is further pulled, driving the sampling shell 3 along the guide rope 2 to the vicinity of the floating member 1 through the sealing member 4, completing a fixed-depth sampling operation.

[0026] The anchoring system formed by the floating member 1 connected to the positioning block 5 through the guide rope 2 effectively solves the problem of position drift caused by water flow and wind in the existing technology when manually throwing the sampling bucket, ensuring that the sampling device can be accurately positioned above the target sampling point. The structural design of the sealing member 4, which has a relatively large weight, enables it to drag the sampling shell 3 to sink synchronously after loosening the pull rope 10, and the upper and lower openings of the sampling shell 3 remain open during the sinking process, ensuring that the sewage in the barrel always maintains circulation with the external sewage at the target depth, avoiding the problem of mixing of sewage at different depths and improving the accuracy of the sampling depth. The through structure of the sampling shell 3 and the matching design of the sealing member 4 enable the upper and lower openings to be quickly closed by pulling the pull rope 10 after reaching the target depth, accurately intercepting the sewage sample at the target depth, and realizing the fixed depth sampling function. The linkage design of the pull rope 10 and the sealing member 4 allows the operator to complete the entire sampling process by controlling the tightness of the pull rope 10. The operation is simple and the sampling depth can be accurately controlled, reducing manual operation errors. The synergistic effect of the positioning block 5, the guide rope 2, the floating part 1 and the sampling tube shell 3 forms a complete system from water surface positioning to underwater depth determination, replacing the existing casting sampling method, improving the sampling accuracy and reliability, and is particularly suitable for scenarios that require multiple fixed-point and fixed-depth sampling, ensuring the consistency and accuracy of the sample data.

[0027] In some examples, the sampling tube shell 3 is a cylindrical structure with two open ends. Its inner wall is provided with a sliding sleeve extending along the axis to cooperate with the sliding of the guide rope 2. The sealing member 4 is composed of a top sealing block 401, a push plate 403, and a bottom sealing block 402 connected in sequence. The diameters of the three blocks increase in sequence. The push plate 403 is located between the top sealing block 401 and the bottom sealing block 402, and its outer periphery is in sliding contact with the inner wall of the sampling tube shell 3. The drainage plate 6 is a circular plate. Its outer periphery is in sliding contact with the inner wall of the sampling tube shell 3 and can move up and down along the tube wall. A through hole 601 is provided in its center. The diameter of the through hole 601 is larger than that of the top sealing block 401 and smaller than that of the push plate 403.

[0028] During sampling, in the initial state, the drain plate 6 is located at the bottom of the sampling tube shell 3, and the bottom sealing block 402 does not block the lower opening, allowing sewage to flow freely from the upper and lower openings. When it is necessary to drain the upper residual liquid, the operator pulls the pull rope 10 to lift the sealing member 4. The top sealing block 401 first passes through the through hole 601 of the drain plate 6. As the sealing member 4 continues to rise, the top surface of the push plate 403 contacts the bottom surface of the drain plate 6 and pushes the drain plate 6 upward synchronously. At this time, the lower opening of the sampling tube shell 3 is still in an open state. During the upward movement of the drain plate 6, the upper residual liquid in the sampling tube shell 3 is squeezed out from the upper opening, while sewage from the external target depth continues to enter from the lower opening. When the push plate 403 moves to the through hole 601 position, its diameter is larger than the edge of the through hole 601, forming a blockage on the through hole 601, preventing the upper liquid from flowing back, and ensuring that the inner cavity of the sampling tube shell 3 only retains sewage entering at the target depth.

[0029] The matching structure of the drainage plate 6 and the push plate 403 uses the diameter difference to form a mechanical linkage. The upward movement of the sealing member 4 drives the drainage plate 6 to move upward, squeezing out the original upper residual liquid in the sampling tube shell 3 from the lower port to avoid mixing of sewage at different depths, and ensuring that the liquid finally remaining in the inner cavity is the sample collected at the target depth. The design of the push plate 403 having a diameter larger than the through hole 601 forms a seal after the drainage plate 6 is pushed into place, preventing the backflow of the discharged upper liquid, and cooperating with the bottom sealing block 402 to seal the lower port, accurate interception of sewage at the target depth is achieved. This structure automatically completes the discharge of residual liquid and filling of target liquid through mechanical transmission without manual intervention, solving the problem of sample contamination caused by residual liquid in traditional sampling devices, improving the purity and accuracy of sewage sampling at different depths, and is particularly suitable for scenarios requiring stratified sampling, ensuring the independence and reliability of samples at each depth.

[0030] In some examples, a necking opening is provided at the top of the sampling cylinder shell 3. The necking opening is an annular structure formed by narrowing the upper end of the sampling cylinder shell 3 inwardly. The inner diameter of the necking opening is smaller than the inner diameter of the main part of the sampling cylinder shell 3, and is used to cooperate with the top sealing block 401 to achieve sealing of the upper opening. A circumferentially extending limit card 301 is provided at the lower part of the inner wall of the sampling cylinder shell 3. The limit card 301 is an annular protrusion structure with a horizontal bottom surface, which is located a certain distance upward from the lower end of the sampling cylinder shell 3. The bottom sealing block 402 is a disc-shaped structure with a flat top surface and an outer diameter larger than the inner diameter of the lower opening of the sampling cylinder shell 3. It can cover the lower opening and fit with the edge of the lower opening. As the blocking member 4 rises along the sampling tube shell 3, the bottom blocking block 402 moves upward synchronously with the blocking member 4 until the top surface of the bottom blocking block 402 contacts the bottom surface of the limit clamp 301. At this time, the limit clamp 301 restricts the bottom blocking block 402 from continuing to move upward, so that the edge of the bottom blocking block 402 accurately fits the edge of the lower opening of the sampling tube shell 3, completing the sealing of the lower opening. At the same time, the top blocking block 401 rises with the blocking member 4 to the necking opening of the sampling tube shell 3, and its edge fits the inner wall of the necking opening, completing the sealing of the upper opening.

[0031] The setting of the limit card platform 301 provides a mechanical limit for the upward movement of the bottom blocking block 402, ensuring that the bottom blocking block 402 accurately blocks the lower opening of the sampling tube shell 3 each time it moves to a fixed position, avoiding the problem of sealing failure caused by excessive or insufficient rise of the blocking member 4, and improving the reliability and consistency of the lower opening sealing. The cooperation between the necking mouth and the top blocking block 401, as well as the cooperation between the limit card platform 301 and the bottom blocking block 402, form a dual mechanical positioning sealing structure for the upper and lower openings. Compared with the existing method of relying on manual control of the blocking position, the structural design eliminates the influence of operational deviation on the sealing effect, ensuring that the upper and lower openings can be reliably closed during the movement of the sampling tube shell 3, preventing sewage from entering or flowing out in the non-sampling state, and ensuring that the collected samples only come from the target position and target depth. The circumferential annular structure of the limit card platform 301 is evenly stressed, which can effectively disperse the impact force when the bottom sealing block 402 moves upward, avoid the degradation of sealing performance caused by local wear, and improve the durability and stability of the sampling device. It is especially suitable for fixed-point sampling in an environment with large water flow fluctuations.

[0032] In some examples, the float 1 is a plate or disc-shaped structure with multiple mounting ears 101 evenly distributed around its periphery. These ears 101 are sheet-like structures that extend outward and have a central through-hole for the towing rope to pass through. One end of the towing rope passes through the through-hole in the ear 101 and is fixedly connected. The other end extends to the shore and can be wrapped around a fixed pile on the shore or connected to a retraction device. During fixed-point operation, the operator first places the float 1 on the water surface, sinks the positioning block 5 and anchors it. The operator then fine-tunes the position of the float 1 using a towing rope on the shore, precisely positioning it above the target sampling point. The towing rope is then tied to a fixed stake or locked using a retractable device to achieve fixed-point operation. After sampling is completed, the operator pulls the towing rope on the shore, which drives the float 1 toward the shore. Simultaneously, the sampling cylinder 3, connected to the float 1 via a pull rope 10, is also towed to the shore, thereby recovering the water sample.

[0033] The combination of the mounting ears 101 and the towing rope enables the operator to remotely control the position of the floating member 1 on the shore, solving the problem of the difficulty of accurate positioning in manual casting in the prior art. By fixing the towing rope on the shore, the floating member 1 can be further fixed on the basis of the underwater anchoring of the positioning block 5, forming a double positioning, thereby improving the stability and accuracy of the positioning. After the sampling is completed, the floating member 1 and the connected sampling cylinder shell 3 can be directly recovered on the shore using the towing rope, without the need for personnel to go into the water or for the boat to approach, thus avoiding the situation where the disturbance of the water body caused by the proximity of the sampling device affects the sample, and also improving the safety and convenience of the recovery operation. The design of multiple mounting ears 101 distributed circumferentially facilitates towing from different directions, ensuring the smooth movement of the floating member 1. Whether it is the fixed-point adjustment or the sample recovery process, the sampling device can be accurately moved to the target position to ensure the reliability and consistency of the sampling data.

[0034] In some examples, the positioning block 5 is a block-shaped structure with a rotation groove at its top. The winding drum 7 is mounted in the rotation groove via a rotation axis and can rotate around the rotation axis on the positioning block 5. One end of the guide rope 2 is fixedly connected to the floating member 1, and the other end is wound around the outer circumference of the winding drum 7. The elastic member is a spiral spring, which is arranged between the winding drum 7 and the positioning block 5. One end of the spiral spring is fixed to the inner wall of the rotation groove of the positioning block 5 and the other end is fixedly connected to the inner wall of the winding drum 7. When the device is deployed, the float 1 is placed on the water's surface, the positioning block 5 sinks, and the guide rope 2 is released from the winding drum 7 as the positioning block 5 descends. The volute spring deforms and accumulates elastic potential energy. When the positioning block 5 sinks to the bottom, the volute spring releases this elastic potential energy, driving the winding drum 7 to rotate, tightening the guide rope 2. This keeps the guide rope 2 taut and perpendicular to the water surface, ensuring the stable position of the float 1. During sampling, if external forces such as water flow cause the guide rope 2 to slacken, the volute spring automatically drives the winding drum 7 to reel in the guide rope 2, maintaining its vertical and taut state.

[0035] The coordinated structure of the volute spring and the winding drum 7 can automatically adjust the tightness of the guide rope 2. Compared with the traditional fixed-length guide rope, it can effectively deal with the problem of guide rope slack caused by environmental factors such as water flow impact, wind and waves, and continuously maintain the stable positioning of the float 1, avoiding the sampling position offset caused by the shaking of the guide rope. The guide rope 2 always remains vertical under the action of the volute spring, providing a stable lifting guide path for the sampling cylinder 3, preventing the sampling cylinder 3 from generating lateral displacement due to the inclination of the guide rope during the lifting process, and improving the accuracy of the sampling depth. This structure can realize the automatic tensioning of the guide rope 2 without manual intervention, replacing the existing method of relying on manual adjustment of the rope, reducing the difficulty of operation, and at the same time enhancing the adaptability of the sampling device in complex water environments, ensuring that multiple samplings can be carried out at the same precise position and depth, and improving the reliability and consistency of the sampling data.

[0036] In some examples, the float 1 is a plate-like structure with a centrally located placement hole 102 extending therethrough. The shape of the placement hole 102 matches the outer shape of the sampling cartridge case 3, and its diameter is slightly larger than the outer diameter of the sampling cartridge case 3, allowing for smooth insertion of the sampling cartridge case 3. A limiting flange may be provided on the top of the sampling cartridge case 3, with an outer diameter larger than the diameter of the placement hole 102. During assembly, the sampling cartridge case 3 is inserted through the mounting hole 102 from the upper surface of the float 1. Installation is complete when the retaining flange of the sampling cartridge case 3 contacts the upper surface of the float 1. The sampling cartridge case 3 is now retained on the guide rope 2 through the mounting hole 102 and can only slide up and down along the guide rope 2. After sampling is complete, the closing member 4 is pulled by the pull rope 10, causing the sampling cartridge case 3 to slide upward along the guide rope 2 until the retaining flange of the sampling cartridge case 3 again abuts against the upper surface of the float 1, allowing the sampling cartridge case 3 to be recovered.

[0037] The placement hole 102 on the float 1 acts as a limiter for the sampling shell 3. Compared with the prior art in which the sampling shell slides freely on the guide rope without any constraints, it effectively prevents the lateral displacement of the sampling shell 3 caused by factors such as water flow impact and wind and wave shaking in the non-sampling state, ensuring that the sampling shell 3 is always directly below the float 1, thereby improving the accuracy of the sampling position. The cooperation between the placement hole 102 and the limiting flange on the top of the sampling shell 3 enables the sampling shell 3 to be accurately positioned during the recovery process, avoiding the separation of the sealing member 4 from the sampling shell 3 due to excessive pulling, and ensuring the stability of the cooperation of the various components of the sampling device. At the same time, this structure simplifies the connection method between the sampling shell 3 and the float 1, reduces the difficulty of installation and operation, and enhances the reliability of the overall device in complex water environments through physical limiting, ensuring that each sampling can be carried out at the same precise position, thereby improving the validity and comparability of the sampling data.

[0038] In some examples, the bottom of the float 1 is symmetrically provided with two connection points, to which the upper ends of the two guide ropes 2 are respectively fixed, forming a structure symmetrical about the central axis of the float 1. A first sliding sleeve 12 is fixedly provided on the outer walls of both sides of the sampling cylinder housing 3. The first sliding sleeve 12 is a hollow tubular structure with an inner diameter adapted to the outer diameter of the guide ropes 2. The center line of the two first sliding sleeves 12 is parallel to the center line of the two guide ropes 2.

[0039] During device assembly, the first sliding sleeves 12 on either side of the sampling cylinder 3 are fitted over the two guide ropes 2, allowing the sampling cylinder 3 to move linearly along the guide ropes 2. When sewage sampling is required, the operator controls the raising and lowering of the sealing member 4 using the pull ropes 10, thereby driving the sampling cylinder 3 to move synchronously within the constraints of the two guide ropes 2. The coordination of the two guide ropes 2 and the first sliding sleeves 12 ensures that the sampling cylinder 3 maintains a stable position during the raising and lowering process, preventing rotation around the axis or lateral deviation.

[0040] Two symmetrically arranged guide ropes 2 and the first sliding sleeve 12 form a double guide rail structure. Compared with the single guide rope design, it significantly enhances the stability of the sampling cylinder shell 3 during the lifting process, prevents it from tilting or rotating due to water flow impact or its own center of gravity offset, ensures that the sampling cylinder shell 3 always remains in a vertical state, and improves the accuracy of the sampling depth. The double guide rope structure forms a lateral constraint on the sampling cylinder shell 3, effectively reducing its shaking amplitude in the horizontal direction. Especially in an environment with turbulent water flow, the sampling cylinder shell 3 can be positioned to the target sampling point more accurately, thereby improving the positioning accuracy. This structure replaces the existing method of relying on the operator's experience to control the sampling posture through mechanical limiting, reduces the influence of human factors on the sampling results, and makes the sampling process more standardized and controllable. The symmetrical arrangement of the two guide ropes 2 also disperses the weight and force of the sampling cylinder shell 3, reduces the wear of a single guide rope, extends the service life of the device, and improves the reliability of the overall structure, making it suitable for long-term continuous sampling operations.

[0041] In some examples, the first sliding sleeve 12 is a hollow tubular structure with a downwardly extending guide tube 1201 coaxially fixedly connected to its bottom. The inner diameter of guide tube 1201 matches the outer diameter of guide rope 2, and guide rope 2 is inserted into and slidably engages with guide tube 1201. A second sliding sleeve 13 is fixedly mounted on each side of the bottom blocking block 402. The second sliding sleeve 13 is a hollow tubular structure with an inner diameter matching the outer diameter of guide tube 1201, and the axis of the second sliding sleeve 13 is parallel to the axis of guide tube 1201.

[0042] During device assembly, the guide rope 2 sequentially passes through the first sliding sleeve 12 and guide tube 1201. The second sliding sleeve 13 is correspondingly mounted on the guide tube 1201, allowing the bottom sealing block 402 to slide along the guide tube 1201. When the operator raises or lowers the sealing member 4 using the pull rope 10, the second sliding sleeves 13 on either side of the bottom sealing block 402 slide on the guide tube 1201, guiding the sealing member 4 along the axis of the guide tube 1201 and ensuring coaxiality between the sealing member 4 and the sampling cylinder housing 3. The guide tube 1201 also protects the guide rope 2, reducing friction between the guide rope 2 and the first sliding sleeve 12.

[0043] The matching structure of the guide tube 1201 and the second sliding sleeve 13 provides a more precise guide for the lifting and lowering of the sealing member 4. Compared with the method in the prior art where the sealing member slides directly on the guide rope, the coaxiality of the sealing member 4 and the sampling tube shell 3 is significantly improved, ensuring that the top sealing block 401 and the bottom sealing block 402 can be accurately aligned and seal the upper and lower openings of the sampling tube shell 3, thereby improving the sealing reliability. The guide tube 1201 wraps the guide rope 2, reducing the shaking and friction of the guide rope 2 during the sliding process, extending the service life of the guide rope 2, and at the same time reducing the sampling error caused by the wear of the guide rope, thereby improving the stability and durability of the device. This structure further enhances the stability of the lifting and lowering process of the sampling tube shell 3 and the sealing member 4 through the dual-guided guide rope and guide tube, especially in an environment with large water flow fluctuations, and can effectively resist external interference to ensure the smooth progress of the sampling process. The sliding fit between the second sliding sleeve 13 and the guide tube 1201 also limits the lateral displacement of the blocking member 4, preventing it from colliding with or getting stuck on the inner wall of the sampling cylinder shell 3, thereby improving the operational smoothness and reliability of the device.

[0044] In some examples, a limit block 14 is fixedly mounted at the lower end of the guide tube 1201. The limit block 14 is a disc-shaped or boss-shaped structure with an outer diameter larger than that of the guide tube 1201. When the second sliding sleeves 13 on either side of the bottom blocking block 402 slide on the guide tube 1201, the top surface of the limit block 14 can contact the bottom surface of the second sliding sleeves 13, thereby limiting further downward movement of the blocking member 4.

[0045] When the operator releases the pull cord 10, causing the sealing member 4 to move downward under its own weight, the second sliding sleeve 13 slides downward along the guide tube 1201 until its bottom surface abuts the top surface of the stopper 14. At this point, the sealing member 4 stops moving downward, and the top and bottom sealing blocks 401 and 402 respectively disengage from the upper and lower openings of the sampling cylinder 3. The inner cavity of the sampling cylinder 3 is now open to the external sewage, and sampling begins. To terminate sampling, the operator pulls the pull cord 10 to move the sealing member 4 upward, resealing the upper and lower openings of the sampling cylinder 3.

[0046] The setting of the limit block 14 provides a mechanical limit for the downward movement of the sealing member 4, ensuring that the sealing member 4 stops each time it moves down to a fixed position, avoiding the top sealing block 401 and the bottom sealing block 402 from being separated from the sampling tube shell 3 due to excessive downward movement, and ensuring that the upper and lower openings of the sampling tube shell 3 can be reliably opened and closed when needed, thereby improving the stability and controllability of the sampling process. This structure replaces the existing method of relying on the operator's experience to control the downward movement of the sealing member through physical limiting, eliminating the influence of human factors on the sampling depth and sealing effect, and making the sampling operation more standardized and accurate. The cooperation between the limit block 14 and the second sliding sleeve 13 can also prevent the sealing member 4 from accidentally moving downward under the impact of water flow, thereby enhancing the reliability of the device in complex environments. At the same time, the design of the limit block 14 protects the lower end of the guide tube 1201, preventing it from being damaged by direct collision with the bottom of the sewage pool, thereby extending the service life of the device.

[0047] In some examples, a rotating frame 910 is fixedly mounted on the upper surface of the floating member 1. The rotating frame 910 is a U-shaped structure with bearing seats at each end. The ends of the reel are mounted on the bearing seats via bearings and can rotate about its own axis. One end of the pull rope 10 is fixed and wound on the reel, and the other end passes through the through hole of the floating member 1 and is connected to the top blocking block 401 of the blocking member 4. The rotating drive member 920 is a waterproof motor fixedly mounted on one side of the rotating frame 910. Its output shaft is transmission-connected to one end of the reel to drive the reel to rotate. The rotating drive member 920 has a built-in wireless receiving module that can wirelessly communicate with an external remote control, which is used to send start and stop signals and rotation direction instructions.

[0048] To raise the blocking member 4, the operator sends a forward signal via the remote control. The rotary drive element 920 drives the reel forward, winding the pull rope 10 and raising the blocking member 4. To lower the blocking member 4, the operator sends a reverse signal. The rotary drive element 920 drives the reel reversely, releasing the pull rope 10, and the blocking member 4 descends under its own weight. The remote control has an operating range of at least 50 meters, meeting the needs of onshore operators for remote control of the floating member 1.

[0049] The cooperation between the rotating shaft assembly 9 and the remote control realizes the remote automated control of the retraction and extension of the pull rope 10. Compared with the manual pulling or releasing of the pull rope in the prior art, it significantly improves the operating efficiency and accuracy, reduces labor costs and human errors. The wireless remote control method allows the operator to remotely control the raising and lowering of the sealing member 4 from a safe position on the shore, avoiding the safety risks near the water, and is particularly suitable for dangerous or inaccessible sampling areas. The precise control capability of the rotating drive member 920 ensures that the retraction and extension speed and length of the pull rope 10 can be accurately adjusted, so that the sealing member 4 can stay stably in the target position, improving the control accuracy of the sampling depth. This structure replaces manual operation with automated control, making the sampling process more standardized and normalized, reducing the deviation of the sampling results caused by individual differences among operators, and improving the reliability and comparability of the data. At the same time, the wireless remote control design enhances the adaptability of the sampling device, which can flexibly respond to different sampling environments and working conditions.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A sewage sampling device, characterized in that: include: A floating member (1), the floating member (1) being used to float on the surface of sewage; a guide rope (2) being provided at the bottom of the floating member (1) for extending into the sewage; The sampling cylinder shell (3) is arranged on the guide rope (2) in a lifting and sliding manner. A sealing member (4) capable of lifting and moving is slidingly provided on the sampling cylinder shell (3). The upper end of the sealing member (4) is provided with a top sealing block (401), and the lower end is provided with a bottom sealing block (402). The sealing member (4) is configured to be able to rise along the sampling cylinder shell (3) so that the top sealing block (401) is sealed at the upper opening of the sampling cylinder shell (3) and the bottom sealing block (402) is sealed at the lower opening of the sampling cylinder shell (3). The top sealing block (401) is connected to a pull rope (10) for pulling the sealing member (4) to drive the sampling cylinder shell (3) to move upward; A positioning block (5) is connected to the lower end of the guide rope (2), and the positioning block (5) is used to sink to the bottom of the sewage pool to provide anchoring for the floating member (1) through the guide rope (2); a winding drum (7) is rotatably provided on the positioning block (5), and the guide rope (2) is wound on the winding drum (7). An elastic member is provided between the winding drum (7) and the positioning block (5), and the elastic member drives the winding drum (7) to reel in the guide rope (2) to tighten the guide rope (2) and keep the guide rope (2) extending outward from the winding drum (7) in a vertical state.

2. A sewage sampling device according to claim 1, characterized in that: The sampling tube shell (3) is provided with a drainage plate (6) inside the sampling tube shell (3) for sliding upward and downward movement. The blocking member (4) further comprises a push plate (403). The push plate (403) is located between the top blocking block (401) and the bottom blocking block (402). The diameters of the top blocking block (401), the push plate (403) and the bottom blocking block (402) increase in sequence. The drainage plate (6) is provided with a through hole (601). The diameter of the through hole (601) is larger than the diameter of the top blocking block (401) and smaller than the diameter of the push plate (403). The blocking member (4) is configured such that, after sliding upward, the top blocking block (401) passes through the through hole (601), the push plate (403) blocks the through hole (601) and pushes the drainage plate (6) upward, so that sewage enters from the bottom of the sampling tube shell (3) and fills the inner cavity of the sampling tube shell (3).

3. A sewage sampling device according to claim 1, characterized in that: The top of the sampling cylinder shell (3) has a necked opening, and a circumferentially extending position-limiting platform (301) is provided on the inner wall of the sampling cylinder shell (3). The position-limiting platform (301) is located at the lower end of the sampling cylinder shell (3), and the bottom surface of the position-limiting platform (301) can abut against the top surface of the bottom blocking block (402) to limit the upward movement of the bottom blocking block (402).

4. A sewage sampling device according to claim 1, characterized in that: The outer periphery of the floating member (1) is provided with a mounting ear (101), and the mounting ear (101) is used for mounting a traction rope to pull the floating member (1).

5. A sewage sampling device according to claim 1, characterized in that: The floating member (1) is provided with a placement hole (102) extending therethrough, and the placement hole (102) is used for the sampling barrel shell (3) to pass through so as to position the sampling barrel shell (3) on the guide rope (2).

6. A sewage sampling device according to claim 1, characterized in that: There are two guide ropes (2), and the two guide ropes (2) are symmetrically arranged on both sides of the central axis of the floating member (1). First sliding sleeves (12) are respectively provided on both sides of the sampling tube shell (3). The two first sliding sleeves (12) are correspondingly arranged on the two guide ropes (2) and are used to guide the sampling tube shell (3) to move up and down along the guide ropes (2).

7. A sewage sampling device according to claim 6, characterized in that: A guide tube (1201) extending downward is provided at the bottom of the first sliding sleeve (12), the guide rope (2) is passed through the guide tube (1201) and slidably cooperates with the guide tube (1201), and second sliding sleeves (13) are respectively provided on both sides of the bottom blocking block (402), and the second sliding sleeves (13) are slidably sleeved on the guide tube (1201).

8. A sewage sampling device according to claim 7, characterized in that: A limit block (14) is provided at the lower end of the guide tube (1201), and the limit block (14) is used to limit the downward movement range of the blocking member (4).

9. The sewage sampling device according to claim 1, characterized in that: The floating member (1) is provided with a rotating shaft assembly (9), the rotating shaft assembly (9) comprising a rotating frame (910), a reel and a rotating drive member (920), the pull rope (10) being wound around the reel, and the rotating drive member (920) being wirelessly connected to a remote controller, the remote controller being used to control the start and stop of the rotating drive member (920).

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