A river sewage sampling device

Abstract

The present invention relates to the technical field of sewage detection, and discloses a river sewage sampling device, including a sampler, the sampler comprising: a water sampling tank with a water inlet at the bottom; a blocking plate slidably arranged in the water sampling tank for blocking the water inlet; a driving plate suspended in the water sampling tank and located above the blocking plate; and a force-applying component elastically arranged between the driving plate and the water sampling tank; during the process of the sampler being inserted into the water, the buoyancy of the water drives the blocking plate to float to a specific height so that the water inlet opens and the sewage and suspended matter enter the water sampling tank. The present invention can allow the sewage and the suspended matter in the sewage to enter the water sampling tank together while ensuring that the sample sewage and the river sewage do not affect each other, ensuring that the suspended matter content in the sampled sewage is not much different from the suspended matter content in the river sewage, so that the data of the river sewage detection is more accurate.

Description

Technical Field

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

[0002] River sewage testing is one of the most important procedures in river sewage treatment. Specific testing parameters include organic concentration, pH value, bacterial contamination, toxicity, and suspended solids content. These are all crucial data parameters in the sewage testing process. Suspended solids are insoluble solids in water and are often expressed as the amount per unit volume of sewage (mg / L).

[0003] For example, the Chinese invention patent with application number CN201811107168.7, announcement number CN109115554B, and name "River Sewage Sampler" discloses multiple sampling balls. A fixing plate is bonded to one side of the sampling ball through waterproof glue, and a connecting plate is provided on the sampling ball on the opposite side of the fixing plate. A water suction port is provided on the same side of the sampling ball and the fixing plate. The water suction port is provided on the side close to the connecting plate. A sealing plug is bonded to the side of the connecting plate opposite to the water suction port. The sealing plug seals the water suction port. Each sampling ball has a sampling cavity inside. When the sampling ball is in a waterless state, the sampling cavity inside is flattened and there is no gas. During use, the water inlet of the outermost sampling ball is opened and slowly absorbs water until the entire sampling ball is saturated. As the outermost sampling ball continues to grow in size, the elastic force of the connecting piece drives the sealing plug out of the water inlet of one sampling ball. At this time, the adjacent sampling balls also begin to recover their shape and absorb water from the river, so that water from different water areas can be absorbed. When all the sampling balls are opened and filled with river water, they can be neutralized and removed for testing. It is also disclosed that the water inlets are all microporous structures, which are conductive during negative pressure water absorption. After the interior of the sampling ball is filled with river water, there is no pressure to recover its shape. At this time, it is difficult for the interior of the sampling cavity to come into contact with the external river water, thereby reducing the mutual influence between the river water and the sewage in the sampling cavity.

[0004] Although the sampler provided by the above-mentioned invention patent can automatically sample sewage at different locations in the water area, its disadvantage is that: since the water suction port is a microporous structure, although it can reduce the mutual influence between the river sewage and the sewage in the sampling cavity, it also makes the suspended matter in the sewage unable to pass through or rarely pass through the water suction port, thereby causing the content of suspended matter in the sewage in the sampling ball (i.e., the sample sewage) to be far less than the content of suspended matter in the river sewage, which in turn leads to inaccurate data on river sewage detection. Summary of the Invention

[0005] The purpose of the present invention is to provide a river sewage sampling device to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a river sewage sampling device, comprising a sampler, the sampler comprising:

[0007] A water collection tank with a water inlet at the bottom;

[0008] a blocking plate, slidably disposed in the water sampling tank, for blocking the water inlet;

[0009] a driving plate suspended in the water sampling tank and located above the blocking plate;

[0010] and a force-applying assembly elastically disposed between the driving plate and the water sampling tank;

[0011] During the process of inserting the sampler into the water, the buoyancy of the water drives the sealing plate to float to a specific height to open the water inlet and allow sewage and suspended matter to enter the water sampling tank. The sewage entering the water sampling tank drives the driving plate to float to drive the force-applying component to pull down the sealing plate to re-seal the water inlet.

[0012] In the above-mentioned river sewage sampling device, a fixed plate located above the driving plate is fixed in the water sampling tank, and a water sampling cavity is formed between the fixed plate, the water sampling tank and the sealing plate.

[0013] In the above-mentioned river sewage sampling device, a guide rod is fixedly installed on the blocking plate, and the top of the guide rod slides through the driving plate and the fixed plate in sequence.

[0014] In the above-mentioned river sewage sampling device, a limit plate located below the fixed plate is fixedly installed on the guide rod. During the upward movement of the blocking plate, the limit plate abuts against the fixed plate to limit the blocking plate, so that the water inlet is opened to a specific size.

[0015] The above-mentioned river sewage sampling device, the water sampling tank includes an upper cylinder and a lower cone cylinder that are integrally arranged, the bottom opening of the lower cone cylinder is smaller than its top opening, the sealing plate is located inside the lower cone cylinder, and the outer surface of the sealing plate is sealed to the inner wall of the lower cone cylinder.

[0016] The above-mentioned river sewage sampling device, the force-applying component includes a sliding plate elastically slidably connected to the water sampling tank, the sliding plate and the driving plate are connected by a connecting rope, a first permanent magnet is fixedly embedded on the sliding plate, and a second permanent magnet that is adsorbed and cooperated with the first permanent magnet is fixedly embedded on the sealing plate. In the initial state, the driving plate uses the connecting rope to stagger the first permanent magnet and the second permanent magnet so that they are not adsorbed, so that the buoyancy of the water can push the sealing plate up when the sampler is inserted into the water.

[0017] The above-mentioned river sewage sampling device has a support plate corresponding to the sliding plate fixed on the water sampling tank, the sliding plate and the support plate are slidably plugged into each other, and an elastic member is provided between the sliding plate and the support plate. Under the action of the gravity of the driving plate, the elastic member is driven to generate a tensile elastic force to make the driving plate hang at a specific height in the water sampling tank.

[0018] In the above-mentioned river sewage sampling device, when the liquid level of the sewage in the water sampling tank reaches the bottom of the driving plate, the driving plate generates buoyancy, so that the elastic member pulls the sliding plate and the first permanent magnet to slide toward the second permanent magnet. During the sliding process of the first permanent magnet, it is adsorbed by the second permanent magnet under the action of magnetic force to drive the sealing plate to move downward to block the water inlet.

[0019] The above-mentioned river sewage sampling device, the force-applying component also includes a first fixed pulley, a second fixed pulley and a third fixed pulley arranged in sequence on the water sampling tank, and the connecting rope is sequentially abutted and passed around the first fixed pulley, the second fixed pulley and the third fixed pulley so that one end of the connecting rope is parallel to the moving direction of the driving plate, and the other end is parallel to the sliding direction of the sliding plate.

[0020] In the above-mentioned river sewage sampling device, the force-applying components are provided in multiple groups and are symmetrically distributed on the left and right sides of the water sampling tank.

[0021] Beneficial effect: In the above technical scheme, the present invention provides a river sewage sampling device, which opens a water inlet at the bottom of the water sampling tank and seals and opens it through a sealing plate, so that when the water inlet is opened, the river sewage and the suspended matter in the sewage can enter the water sampling tank, and cooperates with the action of the driving plate and the force-applying component, so that when the sewage entering the water sampling tank reaches a certain amount, the driving plate can be driven to float, thereby driving the force-applying component to pull the sealing plate downward so that the sealing plate can re-seal the water inlet. At this time, the sample sewage in the water sampling tank will not affect the river sewage. Based on this, compared with the existing technology, the present invention can allow the sewage and the suspended matter in the sewage to enter the water sampling tank together while ensuring that the sample sewage and the river sewage do not affect each other, thereby ensuring that the suspended matter content in the sampled sewage is not much different from the suspended matter content in the river sewage, so that the data of river sewage detection is more accurate, which can effectively solve the shortcomings of the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1A schematic front view of the structure of a river sewage sampling device provided by an embodiment of the present invention;

[0024] Figure 2 A schematic front view of the structure of a sampler provided in an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the three-dimensional structure of the sampler provided by an embodiment of the present invention after the connecting rope is removed;

[0026] Figure 4 A schematic cross-sectional view of the sampler in the initial state provided by an embodiment of the present invention;

[0027] Figure 5 A schematic cross-sectional view of a sampler during the process of river sewage entering a water sampling tank according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the cross-sectional structure of the sampler when sewage sampling is completed according to an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1. Water collection tank; 101. Upper cylinder; 102. Lower cone; 103. Water inlet; 2. Fixed plate; 201. Avoidance hole; 202. Exhaust hole; 3. Column; 4. Guide rod; 401. Cover plate; 402. Limit plate; 5. Sliding plate; 501. First permanent magnet; 6. Support plate; 7. Sealing plate; 701. Second permanent magnet; 8. Drive plate; 9. Connecting rope; 10. First fixed pulley; 11. Second fixed pulley; 12. Third fixed pulley; 13. Elastic rope; 14. Frame; 15. Counterweight. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] like Figure 1-6 As shown, an embodiment of the present invention provides a river sewage sampling device, including a sampler, which includes:

[0033] A water collection tank 1, with a water inlet 103 at the bottom;

[0034] A blocking plate 7 is slidably disposed in the water collection tank 1 to block the water inlet 103;

[0035] a driving plate 8, suspended in the water collection tank 1 and located above the blocking plate 7;

[0036] and a force-applying assembly, elastically disposed between the drive plate 8 and the water collection tank 1;

[0037] When the sampler is inserted into the water, the buoyancy of the water drives the sealing plate 7 to float to a specific height to open the water inlet 103 and allow sewage and suspended matter to enter the water sampling tank 1. The sewage entering the water sampling tank 1 drives the driving plate 8 to float up to drive the force-applying component to pull down the sealing plate 7 to re-seal the water inlet 103.

[0038] The river sewage sampling device provided in this embodiment is used to sample sewage from a river during river sewage testing. Terms related to position and direction, such as "up," "down," "left," and "right," in this embodiment are relative to the accompanying drawings. Specifically, a sampler is used to sample sewage from a river to obtain sampled sewage. Multiple samplers are fixedly mounted on a frame 14, which can be in various shapes, such as a straight line or a cross. The multiple samplers are evenly distributed on the frame 14, enabling the sewage sampling device to simultaneously sample different areas of the river, improving detection accuracy. A counterweight 15 is removably mounted on the frame 14. The counterweight 15, with varying weights, is configured to determine the depth to which the sampler sinks into the sewage. A water sampling tank 1 is the main structure of the sampler. The sampled sewage is stored within the tank 1. A water inlet 103 is defined at the bottom of the tank 1, allowing river sewage to enter the tank 1 through the inlet 103. The sealing plate 7 slides up and down and is set in the water sampling tank 1. When the sealing plate 7 is at the bottom, its outer surface is sealed and fits with the inner wall of the water sampling tank 1 to block the water inlet 103. At this time, the sewage in the water sampling tank 1 will not leak out. When the sealing plate 7 slides upward, a gap is generated between its outer surface and the inner wall of the water sampling tank 1. At this time, the water inlet 103 is opened to allow sewage to enter the water sampling tank 1. The driving plate 8 is suspended in the water sampling tank 1 for cooperating with the force-applying component, and the force-applying component is used to generate a downward force on the blocking plate 7 so that the blocking plate 7 can slide down to the bottom again after moving upward to block the water inlet 103. Since the force-applying component is elastically slidably connected to the water sampling tank 1 and is also connected to the driving plate 8, in the initial state, a certain equilibrium point will be reached under the action of the driving plate 8's own gravity, that is, when the gravity of the driving plate 8 is equal to the spring sliding resistance of the force-applying component, the driving plate 8 and the force-applying component will stay stably in a certain specific position so that the force-applying component will not generate a downward force on the blocking plate 7. The gravity of the blocking plate 7 is less than the buoyancy of the sewage on it. Therefore, when the sampler is placed in the river sewage, the blocking plate 7 slides upward under the action of the buoyancy to open the water inlet 103, and the blocking plate 7 slides up to a specific point. When it reaches a certain height, it will stop rising. At this time, the opening size of the water inlet 103 is sufficient to allow the sewage and suspended matter in the sewage to pass through. As the sampler continues to sink, the sewage will continue to enter the water sampling tank 1 after passing through the water inlet 103. The gravity of the driving plate 8 is less than the buoyancy generated by the sewage. When the sewage water surface reaches the bottom height of the driving plate 8, it will generate an upward buoyancy on the driving plate 8, so that the original balance point of the driving plate 8 and the force-applying component is broken. At this time, the force-applying component is pulled in a specific direction by the elastic force, and the process of the force-applying component being pulled will cause the sealing plate 7 to generate a downward force, and then slide the sealing plate 7 downward to the bottom to block the water inlet 103. At this time, the sewage in the water sampling tank 1 is sample sewage. Since the water inlet 103 is blocked, the sample sewage will not affect each other with the river sewage. Finally, each sampler can be taken out.In the present invention, the opening size of the water inlet 103 is sufficient to allow sewage and suspended matter to pass through. In the prior art, since the water suction port is a microporous structure, although it can reduce the mutual influence between the river sewage and the sewage in the sampling cavity, it also makes it impossible for the suspended matter in the sewage to pass through or very rarely pass through the water suction port, thereby causing the content of suspended matter in the sewage in the sampling ball (i.e., the sample sewage) to be far less than the content of suspended matter in the river sewage, which in turn leads to inaccurate data on river sewage detection.

[0039] In this embodiment, a water inlet 103 is opened at the bottom of the water sampling tank 1 and is sealed and opened by a sealing plate 7, so that when the water inlet 103 is opened, river sewage and suspended matter in the sewage can enter the water sampling tank 1, and in conjunction with the action of the driving plate 8 and the force-applying component, when the sewage entering the water sampling tank 1 reaches a certain amount, the driving plate 8 can be driven to float, thereby driving the force-applying component to pull the sealing plate 7 downward so that the sealing plate 7 can re-block the water inlet 103. At this time, the sample sewage in the water sampling tank 1 will not affect the river sewage. Based on this, compared with the prior art, the present invention can allow sewage and suspended matter in the sewage to enter the water sampling tank 1 together while ensuring that the sample sewage and river sewage do not affect each other, thereby ensuring that the suspended matter content in the sampled sewage is not much different from the suspended matter content in the river sewage, so that the data of river sewage detection is more accurate, which can effectively solve the shortcomings of the prior art.

[0040] In this embodiment, a fixed plate 2 located above the driving plate 8 is fixedly provided in the water sampling tank 1. The fixed plate 2, the water sampling tank 1 and the sealing plate 7 form a water sampling cavity. A column 3 is fixedly installed at the top center of the fixed plate 2. The top of the column 3 is fixedly connected to the frame 14 to achieve a fixed connection between the collector and the frame 14.

[0041] In this embodiment, a guide rod 4 is fixedly mounted on the blocking plate 7. The top of the guide rod 4 slides through the drive plate 8 and the fixed plate 2. The sliding engagement between the guide rod 4 and the fixed plate 2 allows the blocking plate 7 to slide up and down only along the axial direction of the guide rod 4, thereby enabling the blocking plate 7 to slide within the water collection tank 1. The guide rod 4 has a circular or polygonal cross-section, preferably a circular cross-section. There are at least two guide rods 4 to prevent the blocking plate 7 from rotating radially. Furthermore, the guide rod 4 forces the drive plate 8 to slide up and down only along the axial direction of the guide rod 4.

[0042] Furthermore, during actual use, removing the sampler from the river will cause significant disturbances on the water surface, thereby disturbing the river sewage and causing the suspended solids content in the sewage per unit volume to change, which is inconsistent with the actual situation. If the river sewage is mixed with the sample sewage in the water sampling tank 1 at this time, it will directly affect the accuracy of sewage detection. Since the sealing plate 7 can block the bottom water inlet of the water sampling tank 1, only the top of the water sampling tank 1 needs to be considered. For this reason, in this embodiment, the fixed plate 2 seals the top opening of the water sampling tank 1, so that when the sampler is removed from the river, the sewage in the river will not enter the water sampling tank 1 from the top of the water sampling tank 1 and mix with the sample sewage in the water sampling tank 1, which can effectively solve the above-mentioned technical problems.

[0043] Furthermore, an exhaust hole 202 is provided on the fixing plate 2 to connect the interior of the water collection tank 1 with the outside, so that when the river sewage enters the water collection tank 1 through the water inlet 103, the air in the water collection tank 1 can be discharged to the outside, so that the river sewage can smoothly enter the water collection tank 1.

[0044] Furthermore, a cover plate 401 corresponding to the vent 202 is fixedly mounted on the guide rod 4. The cover plate 401 is located above the fixed plate 2. When the blocking plate 7 is at the bottom and blocks the water inlet 103, the bottom of the cover plate 401 abuts against the top of the vent 202, blocking the vent 202. At this time, river sewage cannot pass through the vent 202 into the water sampling tank 1 and mix with the sample sewage. At the same time, because the cover plate 401 is fixedly connected to the guide rod 4, when the blocking plate 7 slides upward to open the water inlet 103, the blocking plate 7 drives the guide rod 4 and the cover plate 401 to move upward synchronously, thereby separating the cover plate 401 from the vent 202, allowing the vent 202 to be open. At this time, river sewage can smoothly enter the water sampling tank 1. In other words, the vent 202 is open during sewage collection to allow sewage to enter the water sampling tank 1, and is automatically blocked after collection is completed to prevent the river sewage from mixing with the sample sewage.

[0045] Since the cover plate 401 moves along with the up and down movement of the blocking plate 7, and when the blocking plate 7 is at the bottom, the top of the bottom exhaust hole 202 of the cover plate 401 abuts, and the cover plate 401 is located above the fixed plate 2 and can be directly observed, by observing the height of the cover plate 401, it can be determined whether the water inlet 103 is successfully opened to achieve sampling, and it can be determined when the river sewage stops entering the water sampling tank 1, so as to inform the operator that the sampler can be taken out.

[0046] In this embodiment, a limiting plate 402 located below the fixed plate 2 is fixedly installed on the guide rod 4. During the upward movement of the blocking plate 7, the limiting plate 402 abuts against the fixed plate 2 to limit the blocking plate 7, so that the water inlet 103 is opened to a specific size, that is, the height of the limiting plate 402 determines the size of the opening of the water inlet 103. Specifically, when the sampler is placed in the river, the blocking plate 7 moves upward with the rise of the sewage level under the action of buoyancy. As the height of the blocking plate 7 increases, the opening of the water inlet 103 becomes larger. After the limiting plate 402 abuts against the fixed plate 2, the blocking plate 7 no longer moves upward with the rise of the sewage level, and the sewage will gradually submerge the blocking plate 7. Before the sewage level rises to the bottom height of the driving plate 8, the blocking plate 7 always maintains a specific height and does not change, that is, the water inlet 103 remains open, allowing sewage to enter the water sampling tank 1 (such as Figure 5 The state after the sewage level reaches the bottom height of the driving plate 8 will be described in detail below.

[0047] The water collection tank 1 includes an upper cylinder 101 and a lower cone 102 that are integrally arranged. The bottom opening of the lower cone 102 is small and the top opening is large. The blocking plate 7 is located inside the lower cone 102. The outer surface of the blocking plate 7 is sealed with the inner wall of the lower cone 102 (such as Figure 4 As described above), at this time, the blocking plate 7 is at the bottom, and the water inlet 103 is blocked by the blocking plate 7. When the blocking plate 7 moves upward, a gap is generated between the outer surface of the blocking plate 7 and the inner wall of the lower cone 102, thereby realizing the opening of the water inlet 103.

[0048] In this embodiment, the force-applying component includes a sliding plate 5 elastically slidably connected to the water sampling tank 1, and the sliding plate 5 is connected to the driving plate 8 by a connecting rope 9. The connecting rope 9 is not elastic. A first permanent magnet 501 is fixedly embedded on the sliding plate 5, and the first permanent magnet 501 is located at the top of the sliding plate 5. A second permanent magnet 701 that is adsorbed and cooperated with the first permanent magnet 501 is fixedly embedded on the sealing plate 7, and the second permanent magnet 701 is located at the bottom of the sealing plate 7. In the initial state, that is, no water sampling is done, under the action of the gravity of the driving plate 8, the driving plate 8 uses the connecting rope 9 to stagger the first permanent magnet 501 and the second permanent magnet 701 and not adsorb them. At this time, the sealing plate 7 will not be subjected to a downward force, so that the buoyancy of the water can push the sealing plate 7 upward during the process of inserting the sampler into the water (the total gravity of the sealing plate 7, the second permanent magnet 701, the guide rod 4, the limit plate 402 and the cover plate 401 is less than the buoyancy of the sealing plate 7).

[0049] Among them, the water collection tank 1 is fixed with a support plate 6 corresponding to the sliding plate 5, the sliding plate 5 and the support plate 6 are slidably plugged, and an elastic member is provided between the sliding plate 5 and the support plate 6. The elastic member is a tension spring or an elastic rope 13, one end of the elastic member is fixedly connected to the sliding plate 5, and the other end is fixedly connected to the support plate 6. Under the action of the gravity of the driving plate 8, the elastic member is driven to generate a tensile elastic force to make the driving plate 8 suspended at a specific height in the water collection tank 1. At this time, the gravity of the driving plate 8 and the elastic force of the elastic member are balanced, and the sliding plate 5 is in an initial state under the action of the connecting rope 9 and the elastic member, so that the first permanent magnet 501 and the second permanent magnet 701 are staggered and not adsorbed (such as Figure 4 shown).

[0050] When the sampler is gradually inserted into the river sewage, the sealing plate 7 is gradually pushed upward by the buoyancy to open the water inlet 103, and the river sewage enters the water sampling tank 1 through the water inlet 103. The liquid level of the sewage in the water sampling tank 1 is the same as the liquid level of the river sewage. When the liquid level of the sewage in the water sampling tank 1 reaches the bottom of the driving plate 8, the driving plate 8 generates buoyancy. At this time, the elastic member contracts so that the elastic member pulls the sliding plate 5 and the first permanent magnet 501 to slide toward the direction of the second permanent magnet 701. The first permanent magnet As the iron 501 slides, the first permanent magnet 501 gradually becomes directly below the second permanent magnet 701, causing the overlap between the first permanent magnet 501 and the second permanent magnet 701 to become larger and larger, thereby increasing the magnetic force generated between the first permanent magnet 501 and the second permanent magnet 701. Under the action of the magnetic force, the first permanent magnet 501 and the second permanent magnet 701 are attracted to each other, driving the sealing plate 7 to move downward to block the water inlet 103. At this time, the exhaust hole 202 is also blocked by the cover plate 401, thereby achieving sewage sampling. Due to the mutual attraction between the first permanent magnet 501 and the second permanent magnet 701, the sealing plate 7 will not slide upward during the sampler removal process, thereby preventing the sewage sample in the water sampling tank 1 from being affected by the river sewage.

[0051] In this embodiment, the force-applying assembly also includes a first fixed pulley 10, a second fixed pulley 11, and a third fixed pulley 12, which are sequentially arranged on the water collection tank 1. The connecting rope 9 sequentially abuts and passes around the first fixed pulley 10, the second fixed pulley 11, and the third fixed pulley 12 so that one end of the connecting rope 9 is parallel to the moving direction of the drive plate 8, and the other end is parallel to the sliding direction of the sliding plate 5, so that the force of the connecting rope 9 on the drive plate 8 and the sliding plate 5 is maximized, so that the drive plate 8 and the sliding plate 5 can slide smoothly.

[0052] Among them, in order to enable the first permanent magnet 501 to be smoothly adsorbed to the second permanent magnet 701 to move the blocking plate 7 downward, the number of the first permanent magnet 501 and the second permanent magnet 701 can be increased. Therefore, in this embodiment, multiple groups of force-applying components are provided and symmetrically distributed on the left and right sides of the water sampling tank 1 to ensure that the blocking plate 7 can be smoothly moved downward to re-block the water inlet 103.

[0053] In this embodiment, the bottom surface of the second permanent magnet 701 and the bottom surface of the sealing plate 7 are located at the same horizontal plane, and the top surface of the first permanent magnet 501 and the top surface of the sliding plate 5 are located at the same horizontal plane. When the sealing plate 7 is at the bottom, the bottom surface of the sealing plate 7 and the bottom surface of the water collection tank 1 are located at the same horizontal plane, so that the first permanent magnet 501 and the second permanent magnet 701 can fit together and be adsorbed, so that the adsorption force between them reaches the maximum.

[0054] In this embodiment, an avoidance hole 201 corresponding to the connecting rope 9 is opened on the fixing plate 2, and the connecting rope 9 passes through the avoidance hole 201, wherein the diameter of the avoidance hole 201 is not less than the diameter of the connecting rope 9, and the difference between the diameter of the avoidance hole 201 and the diameter of the connecting rope 9 is not greater than 0.1mm, so as to prevent river sewage from entering the water collection tank 1 through the avoidance hole 201, as long as the connecting rope 9 can slide smoothly.

[0055] During the sampling process, the liquid level of the river sewage is lower than the top surface height of the fixed plate 2 .

[0056] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A river sewage sampling device, comprising a sampler, characterized in that: The sampler comprises: A water collection tank (1) having a water inlet (103) at its bottom; a blocking plate (7) slidably disposed in the water sampling tank (1) and used to block the water inlet (103); a driving plate (8) suspended in the water sampling tank (1) and located above the blocking plate (7); and a force-applying component elastically arranged between the driving plate (8) and the water collection tank (1); When the sampler is inserted into the water, the buoyancy of the water drives the blocking plate (7) to float up to a specific height so that the water inlet (103) is opened and the sewage and suspended solids enter the water sampling tank (1). The sewage entering the water sampling tank (1) drives the driving plate (8) to float up, thereby driving the force-applying component to pull down the blocking plate (7) to re-block the water inlet (103). The force-applying assembly comprises a sliding plate (5) elastically slidably connected to the water sampling tank (1), the sliding plate (5) and the driving plate (8) are connected via a connecting rope (9), a first permanent magnet (501) is fixedly embedded on the sliding plate (5), and a second permanent magnet (701) that is adsorbed and matched with the first permanent magnet (501) is fixedly embedded on the blocking plate (7), and in an initial state, the driving plate (8) causes the first permanent magnet (501) and the second permanent magnet (701) to be staggered and not adsorbed via the connecting rope (9), so that the buoyancy of the water can push the blocking plate (7) upward when the sampler is inserted into the water; A support plate (6) corresponding to the sliding plate (5) is fixedly provided on the water collection tank (1), the sliding plate (5) and the support plate (6) are slidably plugged, and an elastic member is provided between the sliding plate (5) and the support plate (6), and under the action of the gravity of the driving plate (8), the elastic member is driven to generate a tensile elastic force so that the driving plate (8) is suspended at a specific height in the water collection tank (1); When the liquid level of the sewage in the water collection tank (1) reaches the bottom of the driving plate (8), the driving plate (8) generates buoyancy, so that the elastic member pulls the sliding plate (5) and the first permanent magnet (501) to slide in the direction of the second permanent magnet (701). During the sliding process of the first permanent magnet (501), the first permanent magnet (501) is attracted to the second permanent magnet (701) under the action of magnetic force, thereby driving the blocking plate (7) to move downward to block the water inlet (103).

2. The river sewage sampling device according to claim 1, characterized in that: A fixed plate (2) located above the driving plate (8) is fixedly provided in the water collection tank (1), and a water collection cavity is formed between the fixed plate (2), the water collection tank (1) and the blocking plate (7).

3. The river sewage sampling device according to claim 2, characterized in that: A guide rod (4) is fixedly mounted on the blocking plate (7), and the top of the guide rod (4) slides through the driving plate (8) and the fixed plate (2) in sequence.

4. The river sewage sampling device according to claim 3, characterized in that: A limiting plate (402) located below the fixed plate (2) is fixedly mounted on the guide rod (4); when the blocking plate (7) moves upward, the limiting plate (402) abuts against the fixed plate (2) to limit the blocking plate (7), so that the water inlet (103) opens to a specific size.

5. The river sewage sampling device according to claim 1, characterized in that: The water collection tank (1) comprises an upper cylinder (101) and a lower cone (102) which are integrally arranged. The bottom opening of the lower cone (102) is smaller than the top opening thereof. The blocking plate (7) is located inside the lower cone (102). The outer surface of the blocking plate (7) is in sealing contact with the inner wall of the lower cone (102).

6. The river sewage sampling device according to claim 1, characterized in that: The force applying assembly further comprises a first fixed pulley (10), a second fixed pulley (11) and a third fixed pulley (12) which are sequentially arranged on the water collection tank (1); the connecting rope (9) sequentially abuts and passes over the first fixed pulley (10), the second fixed pulley (11) and the third fixed pulley (12) so that one end of the connecting rope (9) is parallel to the moving direction of the driving plate (8) and the other end is parallel to the sliding direction of the sliding plate (5).

7. The river sewage sampling device according to claim 1, characterized in that: The force applying components are provided in multiple groups and are symmetrically distributed on the left and right sides of the water sampling tank (1).

Images