Sewage sampling device for environmental monitoring

Abstract

The invention discloses a sewage sampling device for environmental monitoring, and relates to the technical field of sewage sampling devices for environmental monitoring, the sewage sampling device for environmental monitoring comprises a reel, the reel is fixedly mounted on a support frame, and a pull rope is wound on the reel. According to the sewage sampling device for environmental monitoring, when a sampling bottle sinks to a sampling depth, a reel is rotated, a pull rope is wound, a steel column is driven to slide upwards, a sealing block is pulled upwards, and a plug plate is pushed upwards in cooperation with a connecting rod and a buffer spring, so that sampled sewage is pushed upwards by the plug plate; meanwhile, an ejector rod is matched to push a first stop block upwards to block a water outlet pipe, so that the sampled sewage is sealed, the situation that the sampled sewage is in contact with sewage at different depths to be fused when the sampled sewage is taken back into a sampling bottle, and monitoring data is influenced is avoided, and the problem that the sewage at different depths cannot be layered when the sewage is sampled is solved.

Description

Technical Field

[0001] This invention relates to the technical field of wastewater sampling devices for environmental monitoring, specifically a wastewater sampling device for environmental monitoring. Background Technology

[0002] In the field of environmental monitoring, wastewater sampling is a core step in obtaining raw data. Its accuracy and efficiency directly affect the scientific nature of environmental assessments and pollution control decisions. Traditional wastewater sampling methods mostly rely on manual operation. Monitoring personnel need to carry sampling containers and directly scoop water samples at sampling points such as wastewater discharge outlets and river sections, or use simple water pumps to extract water samples.

[0003] A wastewater sampling device for environmental monitoring, patent publication number CN216524973U, includes a reel with a pull rope A and a pull rope B wound on it. A connecting plate is located on the lower side of the reel, and a counterweight is located on the lower side of the connecting plate. A water-stop plug is fixedly connected to the center of the top surface of the counterweight, and a sampling bottle is located on the upper side of the water-stop plug. A filter screen is fixedly connected to the bottom surface inside the sampling bottle. In this application, when the sampling bottle is fixed by pulling the pull rope B, the counterweight causes the water-stop plug to descend, canceling the contact between the water-stop plug and the through-hole, allowing for water sampling. After releasing the pull rope B and pulling the pull rope A, the spring A causes the sampling bottle to descend, and the through-hole contacts the water-stop plug, completing the sampling operation. Compared with existing technologies, this device is simple to operate, provides accurate sampling, and improves the reliability of the test results.

[0004] However, the aforementioned wastewater sampling device for environmental monitoring has poor sealing performance. When sampling the wastewater that needs to be sampled, it passes through wastewater at different depths. The wastewater is easily mixed during sampling, which leads to a large error in the data detected by the sampled wastewater. In addition, only one location can be sampled during sampling, resulting in inaccurate wastewater detection data. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a wastewater sampling device for environmental monitoring, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wastewater sampling device for environmental monitoring, comprising a reel fixedly mounted on a support frame, a pull rope wound around the reel, a steel column fixed to the end of the pull rope, the steel column penetrating a counterweight tank and slidably connected at the penetration point, a plug fixed to the upper surface of the inner wall of the counterweight tank, a sampling bottle slidably mounted on the inner wall of the counterweight tank, a water outlet pipe and a connecting pipe on the side wall of the sampling bottle, a water inlet on the bottom surface of the sampling bottle, a bottom filter plate fixed above the water inlet, the bottom filter plate fixedly connected to the inner wall of the sampling bottle, a layered filter plate fixed to the inner wall of the sampling bottle, a control device for convenient stratified sampling of wastewater at different depths inside the sampling bottle, an agitation device for convenient turbulence of wastewater inside the sampling bottle, and an auxiliary device for preventing the stratified sampled wastewater from mixing when poured out. The control device includes a sealing block, a connecting rod, a buffer spring, a blocking plate, a top rod, a first stop block, a limit spring, and a limit strip. The sealing block is slidably connected to the inner wall of the sampling bottle. The steel column penetrates the sealing block and is rotatably connected at the penetration point. The connecting rod is fixedly connected to the bottom surface of the sealing block and penetrates the layered filter plate, with the penetration point fitting together. When the steel column slides upward, it drives the sealing block to slide upward.

[0007] According to the above technical solution, a fixing block is fixed to the outer wall of the connecting rod, the buffer spring is fixedly connected to the upper surface of the fixing block, the connecting rod passes through the blocking plate and is slidably connected at the penetration point, the end of the buffer spring away from the fixing block is fixedly connected to the bottom surface of the blocking plate, the top rod is slidably connected to the upper surface of the blocking plate, the top rod passes through the layered filter plate and is slidably connected at the penetration point, and the top rod is pushed upward when the blocking plate slides upward.

[0008] According to the above technical solution, the first stop block is fixedly connected to the upper surface of the top rod, the first stop block is slidably connected to the inner wall of the sampling bottle, a sliding groove is provided on the upper surface of the sampling bottle, one end of the limiting spring is fixedly connected to the inner wall of the sliding groove, the limiting strip is slidably connected to the inner wall of the sliding groove, the other end of the limiting spring is fixedly connected to the side wall of the limiting strip, the limiting strip passes through the side wall of the sampling bottle and is slidably connected at the penetration point, and the limiting spring is compressed when the limiting strip slides.

[0009] According to the above technical solution, the agitation device includes a fixed plate, a Z-shaped rod, a turntable, a baffle plate, a protrusion, a wave groove, a propeller blade, a return spring, an air bag, and a second stop block. The fixed plate is fixedly connected to the upper surface of the layered filter plate. The connecting rod passes through the fixed plate and fits at the penetration point. When the connecting rod slides, it drives the fixed plate to move.

[0010] According to the above technical solution, the Z-shaped rod passes through the side wall of the fixed plate and is rotatably connected at the penetration point. The end of the Z-shaped rod away from the fixed plate passes through the first stop block and is fitted at the penetration point. The Z-shaped rod passes through the turntable and is fixedly connected at the penetration point. The spoiler is fixedly connected to the side wall of the turntable. The protrusion is fixedly connected to the inner wall of the fixed plate. The wave groove is opened on the outer wall of the connecting rod. The connecting rod also rotates when it moves up and down.

[0011] According to the above technical solution, the outer wall of the protrusion and the inner wall of the wave groove are attached, the propeller blade is fixedly connected to the outer wall of the fixed block, the return spring is fixedly connected to the upper surface of the plug, the end of the return spring away from the plug is fixedly connected to the bottom surface of the bottom filter plate, the airbag is rotatably connected to the outer wall of the connecting rod, the side wall of the airbag is fixed with a fixed rod, the fixed rod is fixedly connected to the side wall of the second stop, and the airbag moves upward under the buoyancy of the sewage.

[0012] According to the above technical solution, the auxiliary device includes a locking spring, a limiting block, a sliding block, a thrust spring, a locking block, a push block, a torsion spring, and a sealing ring. A groove is provided on the upper surface of the sampling bottle. One end of the locking spring is fixedly connected to the inner wall of the groove. The limiting block is slidably connected to the inner wall of the groove. When the blocking plate slides upward, it pushes the limiting block to move.

[0013] According to the above technical solution, the other end of the locking spring is fixedly connected to the side wall of the limiting block, the limiting block penetrates the side wall of the sampling bottle and is slidably connected at the penetration point, the bottom surface of the layered filter plate is provided with a sliding groove, the sliding block is slidably connected to the inner wall of the sliding groove, the side wall of the sliding block is fixedly connected to one end of the thrust spring, and the sliding block compresses the thrust spring when it slides.

[0014] According to the above technical solution, the other end of the thrust spring is fixedly connected to the inner wall of the slide groove, the locking block is hinged to the bottom surface of the sliding block, the push block is fixedly connected to the upper surface of the locking block, the torsion spring is fixedly connected between the sliding block and the locking block, the sealing ring is fixedly connected to the upper surface of the blocking plate, and the locking block is locked to the blocking plate by the elastic force of the torsion spring.

[0015] This invention provides a wastewater sampling device for environmental monitoring. It has the following beneficial effects: (1) The present invention is equipped with a control device. When the sampling bottle is lowered to the depth required for sampling, the reel is rotated to wind up the rope, which drives the steel column to slide upward and pull the sealing block upward. With the help of the connecting rod and the buffer spring, the plug plate is pushed upward, so that the plug plate pushes the sampled sewage upward. At the same time, with the help of the top rod, the first stop block is pushed upward to block the outlet pipe, thereby sealing the sampled sewage. This solves the problem that the sewage after sampling comes into contact with sewage of different depths and mixes when it is returned to the sampling bottle, which affects the data during monitoring. In addition, while sealing the upper layer of sewage, the sampling bottle can also be moved upward relative to the counterweight tank by the plug plate, so that the plug is disengaged from the inlet and the sewage can enter from the inlet, thereby performing secondary sampling of sewage at different depths and further improving the sewage detection data. After the sampled sewage is sealed, the sealing block is limited by the limit spring and the limit strip, thereby avoiding the need for the staff to manually pull the rope to limit the sealing block. This solves the problem that the original equipment required the staff to pull the rope continuously, which was quite laborious.

[0016] (2) The present invention is equipped with a stirring device. When secondary sampling of sewage at different depths, the upward sliding of the first baffle, together with the fixed plate, Z-shaped rod and turntable, drives the baffle to rotate, thereby stirring the sealed sewage and preventing fine impurities in the sewage from settling when left to stand, which would cause the layered filter plate to become clogged. This solves the problem that impurities in sewage can easily cause filter plate clogging. At the same time as secondary sampling, the protrusion and wave groove drive the propeller blade to rotate, thereby generating a vortex in the sampling bottle, which promotes the replacement of sewage that has entered the sampling bottle with sewage that needs to be sampled again. This solves the problem that sewage at different depths is easily mixed together during secondary sampling, which affects the subsequent monitoring data.

[0017] (3) The present invention is equipped with an auxiliary device. When the sampled sewage is poured out, the locking block is fixed below the block plate in conjunction with the locking spring, the limiting block, the sliding block, the thrust spring and the torsion spring. The block plate is locked at the same time as the second stop is opened, so that the sewage sampled in the second step can be poured out first, avoiding the sewage from mixing together when poured out. This solves the problem that the existing sewage sampling device cannot sample sewage at different depths in layers and that the sewage mixes together when poured out, affecting the detection data. When the block plate is locked, the push block is used to make the block plate fit more tightly against the bottom surface of the layered filter plate and squeeze the sealing ring, thereby further improving the sealing performance of the block plate on the upper layer of sewage on the layered filter plate and solving the problem that sewage may mix inside the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the full cross-section of the present invention; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure of region A; Figure 5 This is a schematic diagram of the control device structure of the present invention; Figure 6 This is a schematic diagram of the fixing plate structure of the present invention; Figure 7 This is a schematic diagram of the blocking plate structure of the present invention; Figure 8 This is a schematic diagram of the auxiliary device structure of the present invention.

[0019] In the diagram: 1. Winding reel; 2. Counterweight tank; 3. Sampling bottle; 4. Outlet pipe; 5. Connecting pipe; 6. Bottom filter plate; 7. Layered filter plate; 81. Sealing block; 82. Connecting rod; 83. Buffer spring; 84. Blocking plate; 85. Top rod; 86. First stop block; 87. Limiting spring; 88. Limiting strip; 91. Fixing plate; 92. Z-shaped rod; 93. Turntable; 94. Baffle plate; 95. Protrusion; 96. Wave groove; 97. Propeller blade; 98. Return spring; 99. Airbag; 910. Second stop block; 101. Locking spring; 102. Limiting block; 103. Sliding block; 104. Thrust spring; 105. Locking block; 106. Push block; 107. Torsion spring; 108. Sealing ring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-8One embodiment of the present invention is as follows: a wastewater sampling device for environmental monitoring includes a reel 1, which is fixedly mounted on a support frame. A pull rope is wound around the reel 1, and a steel column is fixed to the end of the pull rope. The steel column passes through a counterweight tank 2 and is slidably connected at the penetration point. A plug is fixed to the upper surface of the inner wall of the counterweight tank 2. A sampling bottle 3 slides on the inner wall of the counterweight tank 2. A water outlet pipe 4 is opened on the side wall of the sampling bottle 3, and a connecting pipe 5 is opened on the side wall of the sampling bottle 3. A water inlet is opened on the bottom surface of the sampling bottle 3, and a bottom filter plate 6 is fixed above the water inlet. The bottom filter plate 6 is fixedly connected to... The inner wall of the sampling bottle 3 is fixed with a layered filter plate 7. The counterweight tank 2 is placed in the sewage to be sampled, and the reel 1 is rotated quickly to make the counterweight tank 2 carry the sampling bottle 3 to sink to the required sampling depth. Due to the large buoyancy in the sewage, the sinking speed of the sampling bottle 3 and the counterweight tank 2 is slower than the speed of releasing the pull rope. The inlet of the sampling bottle 3 is attached to the bottom surface of the counterweight tank 2. The sewage is poured in from the connecting pipe 5, passes through the layered filter plate 7, and flows out from the outlet pipe 4. The inside of the sampling bottle 3 is equipped with a control device to facilitate layered sampling of sewage at different depths.

[0022] The control device includes a sealing block 81, a connecting rod 82, a buffer spring 83, a blocking plate 84, a top rod 85, a first stop block 86, a limit spring 87, and a limit strip 88. The sealing block 81 is slidably connected to the inner wall of the sampling bottle 3. A steel column penetrates the sealing block 81 and is rotatably connected at the penetration point. When the sewage sampling at this depth is completed, the reel 1 is rotated to retract the pull rope. The steel column at the bottom of the pull rope drives the sealing block 81 to slide upward. The connecting rod 82 is fixedly connected to the bottom surface of the sealing block 81. The connecting rod 82 penetrates the layered filter plate 7 and is fitted at the penetration point. A fixing block is fixed to the outer wall of the connecting rod 82. The buffer spring 83 is fixedly connected to the upper surface of the fixing block. The connecting rod 82 penetrates the blocking plate 84 and is slidably connected at the penetration point. Wastewater enters through the connecting pipe 5, passes through the layered filter plate 7, and flows out through the outlet pipe 4. At this point, all the wastewater at this depth is above the block plate 84. The end of the buffer spring 83 away from the fixed block is fixedly connected to the bottom surface of the block plate 84. When the connecting rod 82 slides upward, it drives the buffer spring 83 to move upward through the fixed block. The buffer spring 83 pushes the block plate 84 to slide upward, and the block plate 84 pushes the wastewater at this depth upward. The top rod 85 is slidably connected to the upper surface of the block plate 84. The top rod 85 passes through the layered filter plate 7 and is slidably connected at the penetration point. As the block plate 84 moves upward, it also drives the top rod 85 to slide upward. The first stop block 86 is fixedly connected to the upper surface of the top rod 85. The first stop block 86 is slidably connected to the top surface of the top rod 85. When the push rod 85 slides upward, it pushes the first stop block 86 upward, blocking the outlet and sealing the sewage at this depth above the layered filter plate 7. A sliding groove is provided on the upper surface of the sampling bottle 3. One end of the limiting spring 87 is fixedly connected to the inner wall of the sliding groove, and the limiting strip 88 is slidably connected to the inner wall of the sliding groove. When the sealing block 81 slides upward to the limiting strip 88, the edge of the sealing block 81 slides against the inclined surface of the limiting strip 88, pushing the limiting strip 88 outward. The other end of the limiting spring 87 is fixedly connected to the side wall of the limiting strip 88. The limiting strip 88 penetrates the side wall of the sampling bottle 3, and the penetration point is slidably connected. The outward sliding of the limiting strip 88 pushes against the limiting spring 87. When the sealing block 81 slides to the point of disengagement from the limiting strip 88, the limiting strip 88 is reset by the pushing force of the limiting spring 87, thus limiting the sealing block 81. When the sampling bottle 3 is lowered to the depth required for sampling, the control device rotates the reel 1 to wind up the pull rope, causing the steel column to slide upward and pull the sealing block 81 upward. This, together with the connecting rod 82 and the buffer spring 83, pushes the blocking plate 84 upward, causing the blocking plate 84 to push the sampled sewage upward. At the same time, together with the top rod 85, it pushes the first stop block 86 upward to block the outlet pipe 4, thereby sealing the sampled sewage and preventing the sampled sewage from coming into contact with sewage of different depths and mixing when it is returned to the sampling bottle 3, which would affect the data during monitoring.After the sampled wastewater is sealed, the sealing block 81 is limited by the limiting spring 87 and the limiting strip 88. This avoids the need for operators to manually pull the rope to limit the sealing block 81, solving the problem of the original equipment requiring operators to constantly pull the rope, which was quite laborious.

[0023] In this embodiment, when the equipment needs to be used, the reel 1 is fixed on the support frame, the counterweight tank 2 is placed in the wastewater to be sampled, and the reel 1 is rotated quickly to make the counterweight tank 2 carry the sampling bottle 3 to sink to the required sampling depth. Due to the large buoyancy in the wastewater, the sinking speed of the sampling bottle 3 and the counterweight tank 2 is slower than the speed of releasing the pull rope. The inlet of the sampling bottle 3 is in contact with the bottom surface of the counterweight tank 2. Wastewater is poured in through the connecting pipe 5, passes through the layered filter plate 7, and flows out through the outlet pipe 4. At this time, all the wastewater at this depth is above the block plate 84. When the wastewater sampling at this depth is completed, the reel 1 is rotated to retract the pull rope. The steel column at the bottom of the pull rope drives the sealing block 81 to slide upward, which in turn drives the connecting rod 82 to slide upward as well. 2. When sliding upwards, the fixed block drives the buffer spring 83 to move upwards. The buffer spring 83 pushes the block plate 84 to slide upwards. The block plate 84 pushes the sewage at this depth upwards. At the same time as the block plate 84 moves upwards, it also drives the top rod 85 to slide upwards, pushing the first stop block 86 to slide upwards, blocking the outlet, so that the sewage at this depth is sealed above the layered filter plate 7. When the sealing block 81 slides upwards to the limit strip 88, the edge of the sealing block 81 slides against the inclined surface of the limit strip 88, pushing the limit strip 88 to slide outwards, compressing the limit spring 87. When the sealing block 81 slides to the point of disengaging from the limit strip 88, the limit strip 88 is reset by the thrust of the limit spring 87, limiting the sealing block 81.

[0024] Please see Figures 1-8Based on the above embodiments, in another embodiment of the present invention, the sampling bottle 3 is provided with an agitation device for facilitating the disturbance of sewage. The agitation device includes a fixed plate 91, a Z-shaped rod 92, a turntable 93, a baffle 94, a protrusion 95, a wave groove 96, a propeller blade 97, a return spring 98, an airbag 99, and a second stop block 910. The fixed plate 91 is fixedly connected to the upper surface of the layered filter plate 7. The connecting rod 82 passes through the fixed plate 91 and is fitted at the penetration point. The Z-shaped rod 92 passes through the side wall of the fixed plate 91 and is rotatably connected at the penetration point. The end of the Z-shaped rod 92 away from the fixed plate 91 passes through the first stop block 86 and is fitted at the penetration point. When the first stop block 86 slides upward, it drives the end of the Z-shaped rod 92 passing through it to move upward. The end of the Z-shaped rod 92 furthest from the first stop 86 is rotatably connected to the side wall of the fixed plate 91, and the fixed plate 91 is fixedly connected to the layered filter plate 7. Therefore, when the end of the Z-shaped rod 92 that passes through the first stop 86 moves upward, it drives the Z-shaped rod 92 to rotate. The Z-shaped rod 92 passes through the turntable 93, and the connection at the penetration point is fixed. The rotation of the Z-shaped rod 92 drives the turntable 93 to rotate. The baffle 94 is fixedly connected to the side wall of the turntable 93. The rotation of the turntable 93 drives the baffle 94 to stir the sampled wastewater, preventing the wastewater from settling and causing impurities in the wastewater to sink to the bottom and clog the layered filter plate 7. The protrusion 95 is fixedly connected to the inner wall of the fixed plate 91, and the corrugated groove 96 is formed on the outer wall of the connecting rod 82. When the connecting rod 82 slides upward, it drives the outer wall of the connecting rod 82 to rotate. As the wave groove 96 moves upward, the outer wall of the protrusion 95 and the inner wall of the wave groove 96 come into contact. Therefore, when the wave groove 96 moves upward, the protrusion 95 slides on its inner wall. Since the protrusion 95 is stationary relative to the sampling bottle 3, the wave groove 96 rotates relative to the sampling bottle 3. Consequently, the connecting rod 82 rotates while sliding upward. The propeller blade 97 is fixedly connected to the outer wall of the fixed block. The rotation of the connecting rod 82 drives the propeller blade 97 to rotate through the fixed block. The rotation of the propeller blade 97 generates a vortex, which promotes the return spring 98, which is fixedly connected to the upper surface of the plug. When the plug plate 84 is pushed upward and slides to the bottom surface of the layered filter plate 7, it drives the layered filter plate 7 and the sampling bottle 3 to move upward together, stretching the return spring 98. The return spring 98 moves away from the plug. One end of the head is fixedly connected to the bottom surface of the bottom filter plate 6. When the bottom of the layered filter plate 7 is filled, the sampling bottle 3 and the counterweight tank 2 experience the same resistance and are simultaneously subjected to the elastic force of the return spring 98, causing the sampling bottle 3 and the counterweight tank 2 to fit together again. The plug blocks the inlet. The airbag 99 is rotatably connected to the outer wall of the connecting rod 82. Since the plug plate 84 seals the previously sampled sewage above the layered filter plate 7, the sewage that enters later is poured in through the inlet and flows out through the connecting pipe 5. As the sewage level rises, the airbag 99 moves upward. A fixing rod is fixed to the side wall of the airbag 99. The fixing rod is fixedly connected to the side wall of the second stop block 910. The upward movement of the airbag 99 drives the second stop block 910 to slide upward through the fixing rod. The second stop block 910 blocks the connecting pipe 5.The secondary sampled wastewater is sealed below the layered filter plate 7. When secondary sampling of wastewater at different depths, this agitation device, through the upward sliding of the first baffle 86, in conjunction with the fixed plate 91, Z-shaped rod 92, and turntable 93, drives the agitation plate 94 to rotate, thereby stirring the sealed wastewater. This prevents fine impurities in the wastewater from settling and causing clogging of the layered filter plate 7, thus solving the problem of impurities in wastewater easily clogging the filter plate. While performing secondary sampling, the convex block 95 and the wave groove 96 drive the propeller blade 97 to rotate, thereby generating a vortex in the sampling bottle 3. This promotes the replacement of the sewage that previously entered the sampling bottle 3 with the sewage that needs to be sampled again from the outside. This solves the problem that sewage from different depths is easily mixed together during secondary sampling, which affects subsequent monitoring data.

[0025] The sampling bottle 3 is equipped with an auxiliary device to prevent the stratified wastewater from mixing during pouring. This device includes a locking spring 101, a limiting block 102, a sliding block 103, a thrust spring 104, a locking block 105, a push block 106, a torsion spring 107, and a sealing ring 108. A groove is formed on the upper surface of the sampling bottle 3. One end of the locking spring 101 is fixedly connected to the inner wall of the groove, and the limiting block 102 is slidably connected to the inner wall of the groove. The other end of the locking spring 101 is fixedly connected to the side wall of the limiting block 102. The limiting block 102 penetrates the side wall of the sampling bottle 3 and is slidably connected at the penetration point. After the wastewater from the second sampling is poured out, the limiting block 102 is pulled outwards, and simultaneously the steel column is pushed downwards again. The steel column causes the sealing block 81 and the connecting rod 82 to slide downwards. The buffer spring 83 is stretched by the fixed block. When the buffer spring 83 is stretched to its maximum extent, the blocking plate 84 is pulled down. The blocking plate 84 pushes the locking block 105 down, compressing the torsion spring 107 and releasing the limit on the blocking plate 84. The blocking plate 84 slides down, and the first stop block 86 slides down through the top rod 85. At this time, the wastewater sampled first can be poured out. The bottom surface of the layered filter plate 7 has a sliding groove. The sliding block 103 is slidably connected to the inner wall of the sliding groove. The side wall of the sliding block 103 is fixedly connected to one end of the thrust spring 104. The other end of the thrust spring 104 is fixedly connected to the inner wall of the sliding groove. The locking block 105 is hinged to the bottom surface of the sliding block 103. When the blocking plate 84 moves upward to the locking block 105, it pushes the locking block 105 to slide away from the blocking plate 84. The blocking plate 84 pushes the sliding block 103 to slide, simultaneously compressing the thrust spring 104. When the blocking plate 84 adheres to the layered filter plate 7, the sliding block 103 is reset by the elastic force of the thrust spring 104. The push block 106 is fixedly connected to the upper surface of the locking block 105, and the torsion spring 107 is fixedly connected between the sliding block 103 and the locking block 105. The locking block 105 is locked by the elastic force of the torsion spring 107. The sealing ring 108 is fixedly connected to the upper surface of the blocking plate 84. The push block 106 above the locking block 105 adheres to the chamfer of the bottom surface of the blocking plate 84, applying an upward thrust to the blocking plate 84. This causes the sealing ring 108 to be deformed by the pressure of both the blocking plate 84 and the layered filter plate 7, further enhancing the sealing performance between the blocking plate 84 and the layered filter plate 7. When the sampled wastewater is poured out, this auxiliary device, in conjunction with locking spring 101, limiting block 102, sliding block 103, thrust spring 104, and torsion spring 107, limits locking block 105 to the bottom of block plate 84. Simultaneously with opening the second stop block 910, block plate 84 is locked, allowing the wastewater sampled a second time to be poured out first, preventing the wastewater from mixing during pouring. This solves the problem that existing wastewater sampling devices cannot sample wastewater at different depths in layers, and that mixing during pouring affects the test data. When locking block plate 84, push block 106 ensures that block plate 84 fits more tightly against the bottom surface of the layered filter plate 7, compressing the sealing ring 108, thereby further improving the sealing performance of block plate 84 against the upper layer of wastewater on the layered filter plate 7.This solves the problem of wastewater potentially mixing inside the device.

[0026] In this embodiment, when the first stop block 86 slides upward, it drives one end of the Z-shaped rod 92 through it to move upward. The end of the Z-shaped rod 92 away from the first stop block 86 is rotatably connected to the side wall of the fixed plate 91, and the fixed plate 91 is fixedly connected to the layered filter plate 7. Therefore, when the end of the Z-shaped rod 92 through the first stop block 86 moves upward, it drives the Z-shaped rod 92 to rotate. The rotation of the Z-shaped rod 92 drives the turntable 93 to rotate, and the rotation of the turntable 93 drives the baffle plate 94 to agitate the sampled wastewater. When the connecting rod 82 slides upward, it drives the corrugated groove 96 on its outer wall to move upward. The outer wall of the protrusion 95 is in contact with the inner wall of the corrugated groove 96. Therefore, when the corrugated groove 96 moves upward, the protrusion 95 slides on its inner wall. Since the protrusion 95 is stationary relative to the sampling bottle 3, the corrugated groove 96 rotates relative to the sampling bottle 3. Thus, the connecting rod 82 rotates while sliding upward, driving the propeller blade 97 to rotate through the fixed block. Because the entire device is placed in the wastewater... Therefore, when the blocking plate 84 slides upward under the thrust to the bottom surface of the layered filter plate 7, it drives the layered filter plate 7 and the sampling bottle 3 to move upward together. Meanwhile, the counterweight tank 2 is simultaneously subjected to gravity and the resistance of the sewage, thus increasing the distance between the counterweight tank 2 and the sampling bottle 3. This causes the plug to disengage from the inlet, simultaneously stretching the return spring 98. At this point, because the blocking plate 84 seals the previously sampled sewage above the layered filter plate 7, the subsequent sewage enters through the inlet and flows out through the connecting pipe 5, along with the sewage... As the water level rises, the airbag 99 moves upward, causing the second stop block 910 to slide upward via the fixed rod. When the bottom of the layered filter plate 7 is filled, the airbag 99 also moves to the connecting pipe 5 as the water level deepens. The second stop block 910 blocks the connecting pipe 5. At this time, the sampling bottle 3 and the counterweight tank 2 experience the same resistance and are simultaneously subjected to the elastic force of the return spring 98, causing the sampling bottle 3 and the counterweight tank 2 to fit together again. The plug blocks the inlet, sealing the secondary sampled wastewater below the layered filter plate 7.

[0027] When the blocking plate 84 moves upward to the locking block 105, it pushes the locking block 105 to slide away from the blocking plate 84. The blocking plate 84 pushes the sliding block 103 to slide, while compressing the thrust spring 104. When the blocking plate 84 is in contact with the layered filter plate 7, the sliding block 103 is reset by the elastic force of the thrust spring 104, and at the same time, it drives the locking block 105 to move below the blocking plate 84. The locking block 105 is locked by the elastic force of the torsion spring 107. The push block 106 above the locking block 105 is in contact with the chamfer of the bottom surface of the blocking plate 84, and applies an upward thrust to the blocking plate 84, so that the sealing ring 108 is deformed by the pressure of the blocking plate 84 and the layered filter plate 7. When it is necessary to pour out the wastewater sampled twice in the sampling bottle 3, the limiting strip 88 is pulled outward, and the steel column is pushed downward. The steel column pushes the sealing block 81 towards The sealing block 81 slides down and stops when it reaches the limiting block 102. At this time, the sealing block 81 pushes the airbag 99 downward through the connecting rod 82. The airbag 99 drives the second stop block 910 downward through the fixing rod, exposing the connecting pipe 5. At this time, the secondary sampled sewage can be poured out from the connecting pipe 5. After the secondary sampled sewage is poured out, the limiting block 102 is pulled outward, and the steel column is pushed downward again. The steel column drives the sealing block 81 and the connecting rod 82 to slide downward. The buffer spring 83 is stretched through the fixing block. When the buffer spring 83 is stretched to its maximum limit, the blocking plate 84 is pulled down. The blocking plate 84 pushes the locking block 105 downward, compresses the torsion spring 107, and releases the limitation on the blocking plate 84. The blocking plate 84 slides down and drives the first stop block 86 downward through the top rod 85. At this time, the first sampled sewage can be poured out.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater sampling device for environmental monitoring, comprising a reel (1), characterized in that: A pull rope is wound around the reel (1), and a steel column is fixed at the end of the pull rope. The steel column passes through the counterweight tank (2) and is slidably connected at the point of penetration. A plug is fixed on the upper surface of the inner wall of the counterweight tank (2). A sampling bottle (3) slides on the inner wall of the counterweight tank (2). A water outlet pipe (4) is opened on the side wall of the sampling bottle (3). A connecting pipe (5) is opened on the side wall of the sampling bottle (3). A water inlet is opened on the bottom surface of the sampling bottle (3). A bottom filter plate (6) is fixed above the water inlet. The bottom filter plate (6) is fixedly connected to the inner wall of the sampling bottle (3). A layered filter plate (7) is fixed on the inner wall of the sampling bottle (3). A control device is provided inside the sampling bottle (3) to facilitate layered sampling of sewage at different depths. A stirring device is provided inside the sampling bottle (3) to facilitate turbulence of sewage. An auxiliary device is provided inside the sampling bottle (3) to prevent the layered sampled sewage from merging when poured out. The control device includes a sealing block (81), a connecting rod (82), a buffer spring (83), a blocking plate (84), a top rod (85), a first stop block (86), a limiting spring (87), and a limiting strip (88). The sealing block (81) is slidably connected to the inner wall of the sampling bottle (3). The steel column penetrates the sealing block (81) and is rotatably connected at the penetration point. The connecting rod (82) is fixedly connected to the bottom surface of the sealing block (81). The connecting rod (82) penetrates the layered filter plate (7) and is fitted at the penetration point.

2. The wastewater sampling device for environmental monitoring according to claim 1, characterized in that: The outer wall of the connecting rod (82) is fixed with a fixing block, the buffer spring (83) is fixedly connected to the upper surface of the fixing block, the connecting rod (82) passes through the blocking plate (84) and is slidably connected at the penetration point, the end of the buffer spring (83) away from the fixing block is fixedly connected to the bottom surface of the blocking plate (84), the top rod (85) is slidably connected to the upper surface of the blocking plate (84), and the top rod (85) passes through the layered filter plate (7) and is slidably connected at the penetration point.

3. The wastewater sampling device for environmental monitoring according to claim 2, characterized in that: The first stop (86) is fixedly connected to the upper surface of the top rod (85). The first stop (86) is slidably connected to the inner wall of the sampling bottle (3). A sliding groove is provided on the upper surface of the sampling bottle (3). One end of the limiting spring (87) is fixedly connected to the inner wall of the sliding groove. The limiting strip (88) is slidably connected to the inner wall of the sliding groove. The other end of the limiting spring (87) is fixedly connected to the side wall of the limiting strip (88). The limiting strip (88) penetrates the side wall of the sampling bottle (3) and is slidably connected at the penetration point.

4. The wastewater sampling device for environmental monitoring according to claim 1, characterized in that: The agitation device includes a fixed plate (91), a Z-shaped rod (92), a turntable (93), a baffle (94), a protrusion (95), a wave groove (96), a propeller blade (97), a return spring (98), an airbag (99), and a second stop block (910). The fixed plate (91) is fixedly connected to the upper surface of the layered filter plate (7), and the connecting rod (82) passes through the fixed plate (91) and fits at the point of penetration.

5. The wastewater sampling device for environmental monitoring according to claim 4, characterized in that: The Z-shaped rod (92) passes through the side wall of the fixed plate (91) and is rotatably connected at the point of penetration. The end of the Z-shaped rod (92) away from the fixed plate (91) passes through the first stop block (86) and is fitted at the point of penetration. The Z-shaped rod (92) passes through the turntable (93) and is fixedly connected at the point of penetration. The spoiler (94) is fixedly connected to the side wall of the turntable (93). The protrusion (95) is fixedly connected to the inner wall of the fixed plate (91). The wave groove (96) is opened on the outer wall of the connecting rod (82).

6. The wastewater sampling device for environmental monitoring according to claim 5, characterized in that: The outer wall of the protrusion (95) and the inner wall of the wave groove (96) are attached. The propeller blade (97) is fixedly connected to the outer wall of the fixed block. The return spring (98) is fixedly connected to the upper surface of the plug. The end of the return spring (98) away from the plug is fixedly connected to the bottom surface of the bottom filter plate (6). The airbag (99) is rotatably connected to the outer wall of the connecting rod (82). The side wall of the airbag (99) is fixed with a fixing rod. The fixing rod is fixedly connected to the side wall of the second stop block (910).

7. The wastewater sampling device for environmental monitoring according to claim 1, characterized in that: The auxiliary device includes a locking spring (101), a limiting block (102), a sliding block (103), a thrust spring (104), a locking block (105), a push block (106), a torsion spring (107), and a sealing ring (108). The upper surface of the sampling bottle (3) is provided with a groove. One end of the locking spring (101) is fixedly connected to the inner wall of the groove, and the limiting block (102) is slidably connected to the inner wall of the groove.

8. A wastewater sampling device for environmental monitoring according to claim 7, characterized in that: The other end of the locking spring (101) is fixedly connected to the side wall of the limiting block (102). The limiting block (102) penetrates the side wall of the sampling bottle (3) and is slidably connected at the penetration point. The bottom surface of the layered filter plate (7) is provided with a sliding groove. The sliding block (103) is slidably connected to the inner wall of the sliding groove. The side wall of the sliding block (103) is fixedly connected to one end of the thrust spring (104).

9. A wastewater sampling device for environmental monitoring according to claim 8, characterized in that: The other end of the thrust spring (104) is fixedly connected to the inner wall of the slide groove. The locking block (105) is hinged to the bottom surface of the sliding block (103). The push block (106) is fixedly connected to the upper surface of the locking block (105). The torsion spring (107) is fixedly connected between the sliding block (103) and the locking block (105). The sealing ring (108) is fixedly connected to the upper surface of the blocking plate (84).

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