A water quality sampling device for environmental engineering testing

Abstract

This invention belongs to the field of water quality sampling technology, specifically a water quality sampling device for environmental engineering testing. It includes a sampling cylinder with multiple storage chambers arranged in a ring shape inside. A cap is installed at the top of the sampling cylinder, and multiple sliding columns are slidably connected inside the cap. Each sliding column is slidably connected to a storage chamber, allowing water to be drawn into the storage chamber by driving the sliding column to move within it. A slot is provided on the outer surface of the upper end of each sliding column. This invention addresses the problem that existing sampling devices typically involve tying a sampling bottle to a rope and then placing it in a river, lake, or reservoir. The bottle's weight causes it to sink to the bottom of the water, and the rope is used to pull the bottle back to shore for sampling and retrieval. However, while this method is convenient for water collection and carrying the sampling device, it is difficult to collect water at different depths in rivers, lakes, or reservoirs, resulting in inaccurate water quality testing data.

Description

Technical Field

[0001] This invention belongs to the technical field of water quality sampling devices, specifically a water quality sampling device for environmental engineering testing. Background Technology

[0002] Water quality is a shorthand for the quality of water bodies. It encompasses the physical characteristics of water bodies, such as color, turbidity, and odor; the chemical characteristics, such as the content of inorganic and organic matter; and the biological characteristics, such as the content of bacteria, microorganisms, plankton, and benthic organisms. To evaluate water quality, a series of water quality parameters and standards have been established, such as standards for drinking water, industrial water, and fishery water. Water sampling bottles are commonly used to preserve collected water samples during sampling.

[0003] A patent with publication number CN119178866B discloses a water quality testing device for hydraulic engineering. This device, through a combination of an outer frame and a float, allows the float to respond in real-time to changes in water waves, automatically raising and lowering the outer frame. This enables quantitative extraction of river water. Compared to traditional manual sampling methods, this automated sampling mechanism improves sampling efficiency and consistency, increases work efficiency, significantly reduces the workload of operators, and minimizes errors caused by human factors. Through an adjustable mechanism, the outer frame and float automatically rise and fall with changes in water waves, allowing for adjustment of the sampling depth of the collection bucket. This enables the collection bucket to collect samples from water sources at different depths, ensuring that the collected water samples cover the vertical distribution of the water body, thus comprehensively reflecting changes in water quality and providing a practical and effective guarantee for the scientific monitoring of water resources.

[0004] The above-mentioned method still has some problems in practical application. Usually, the sampling bottle is tied to the rope and then the sampling bottle is thrown into the river, lake or reservoir, so that the sampling bottle sinks into the river, lake or reservoir by its own weight. Then the sampling bottle is pulled to the shore by the rope for retrieval and sampling. However, although this sampling method is convenient for water body collection and carrying of sampling equipment, it is difficult to collect samples from different depths of river, lake or reservoir water, resulting in inaccurate water quality test data.

[0005] Therefore, the present invention provides a water quality sampling device for environmental engineering testing. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides an environmental engineering testing water quality sampling device, including a sampling cylinder, the sampling cylinder having multiple liquid storage chambers arranged in a ring shape inside, a cylinder cover installed at the upper end of the sampling cylinder, and multiple sliding columns slidably connected inside the cylinder cover, and each sliding column being slidably connected to a liquid storage chamber, so that river water can be drawn into the liquid storage chamber for storage by driving the sliding column to slide in the liquid storage chamber, and a slot is provided on the outer side of the upper end of the sliding column; The upper end of the cylinder cover is provided with a buoyancy switch assembly, and the buoyancy switch assembly is fixedly connected to the sliding column through a slot. The buoyancy switch assembly enables the sampling cylinder to control the opening of the sliding column by water pressure buoyancy after reaching the specified water level inside the river, thereby allowing the sliding column to slide in the liquid storage cavity to extract river water at the specified water level for sampling.

[0008] Preferably, the buoyancy switch assembly includes a plurality of U-shaped fixing blocks fixed to the upper end of the cylinder cover, and the plurality of U-shaped fixing blocks are fixed in a ring to the outside of the upper end of the cylinder cover. Each U-shaped fixing block has an L-shaped rocker arm rotatably connected to its inner cavity, and the L-shaped rocker arm is used to engage and fix the sliding column.

[0009] Preferably, a rotating block is rotatably connected to one end of the L-shaped rocker arm, a U-shaped connecting block is rotatably connected to one end of the rotating block, a winding drum is fixedly connected to one end of the U-shaped connecting block, a traction rope is wound inside the winding drum, and a float is fixedly connected to one end of the traction rope.

[0010] Preferably, a winding frame is rotatably connected to the inner cavity of the winding drum. A U-shaped block is inserted into one end of the winding frame and is rotatably connected to the inner wall of the winding frame. A torsion spring is inserted into the inner cavity of the U-shaped block, and the other end of the torsion spring is fixedly installed with the traction rope.

[0011] Preferably, the winding drum has a T-shaped groove on its outer side, and the inner wall of the T-shaped groove has multiple toothed grooves. A locking block is slidably connected to the inner cavity of the T-shaped groove, and elastic toothed blocks are provided on both sides of the locking block. The elastic toothed blocks are inserted and engaged with the toothed grooves. The traction rope has a length mark engraved on its outer side to indicate the length of the winding. The traction rope is made of polyester material, and one end of the traction rope is fixedly connected to the outside of the winding frame.

[0012] Preferably, a piston disc is fixedly connected to one end of the sliding column in the liquid storage chamber. A first one-way valve is provided inside the piston disc. A drain chamber is opened inside the sliding column. Two rubber tubes are installed on the upper end of the piston disc, and one end of the two rubber tubes is fixedly connected to the cylinder cover.

[0013] Preferably, the sampling tube is equipped with a water flow cleaning component, which can reduce the resistance of the river water, allowing the sampling tube to sink vertically and quickly. At the same time, it can also use the force of the water flow to move and clean up garbage and other debris in the river water near the lower end of the sampling tube.

[0014] Preferably, the water flow cleaning component includes a guide cavity inside the sampling tube, and the lower opening diameter of the guide cavity is large, which can quickly guide the flow of river water in the guide cavity, so that the sampling tube can sink vertically and quickly.

[0015] Preferably, a mounting bracket is fixedly connected to the inner cavity of the flow guide cavity, and a rotating shaft is rotatably connected inside the mounting bracket. The upper end of the rotating shaft is rotatably connected to the cylinder cover, and a cross cleaning frame is fixedly connected to the lower end of the rotating shaft. Multiple impellers are fixedly connected to the outside of the rotating shaft. A groove is opened at the lower end of the sampling cylinder, and the mounting bracket is fixedly connected to the inner cavity of the groove by strong magnetic attraction.

[0016] Preferably, the sampling cylinder has multiple sampling ports at its lower end, and the sampling ports are connected to the liquid storage chamber. A second one-way valve is provided inside the sampling port, and a lifting lug is fixed to the upper end of the cylinder cover.

[0017] The beneficial effects of this invention are as follows: 1. The present invention provides a water quality sampling device for environmental engineering testing. The sampling cylinder, along with a sliding column, is brought into contact with a table or ground. Pressing the sliding column causes it to slide into the liquid storage chamber. Once the column is in position, an L-shaped rocker arm is inserted into a slot, causing it to flip upwards. However, the L-shaped rocker arm is in contact with the cylinder cover and cannot continue to flip, thus fixing the sliding column. The sampling cylinder is then submerged in a river or lake until it sinks. When the sampling cylinder reaches a specific position, a float rises to the surface, the traction rope taut, and the winding drum moves upwards. The winding drum, through a U-shaped connecting block, pulls a rotating block, causing the L-shaped rocker arm to... When the lever flips upwards, the L-shaped rocker arm and the locking end of the slot form a semi-circular arc. After flipping to a certain angle, the L-shaped rocker arm disengages from the slot, and the sliding column quickly resets, drawing river or lake water from a specific location into the storage chamber to complete the sampling. As the sliding column draws water, the weight of the sampling tube increases, and the sliding column expels air from the upper part of the storage chamber, reducing buoyancy and pulling the float to continue sinking. As the sampling tube continues to sink, another float pulls the corresponding traction rope to taut, activating another set of buoyancy switch components, causing the sliding column to draw water at that depth, thus achieving stratified sampling of water at different depths.

[0018] 2. The environmental engineering testing water quality sampling device of the present invention involves immersing a sampling tube in river or lake water. As the sampling tube sinks, the river or lake water enters the guiding cavity. When the water flows through the guiding cavity, it impacts the impeller, causing it to rotate. The impeller drives the rotating shaft, which in turn drives the cross cleaning frame to rotate. Since the cross cleaning frame is in close contact with the lower end of the sampling tube, it can scrape and clean the sampling port during rotation, and also remove garbage and other debris near the lower end of the sampling tube, preventing these debris from interfering with the sampling tube's water collection. The lower opening diameter of the guiding cavity is relatively large, which, together with the impeller rotation, can quickly guide the river water through the cavity, making the sampling tube vertical and sinking quickly. This ensures that it can work with the buoyancy switch assembly to sample the target water layer, improving the accuracy of the sampling device in collecting water samples from the water layer. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the main view of the present invention; Figure 2 This is a schematic diagram of the overall structure of the invention viewed from below; Figure 3 This is a schematic diagram of a half-section of the sampling tube of the present invention; Figure 4 This is a schematic diagram of the assembly structure of the water flow cleaning component of the present invention; Figure 5 This is a schematic diagram of the assembly structure of the rubber tube elastic band of the present invention; Figure 6 This is a schematic diagram of the overall structure of the buoyancy switch assembly of the present invention; Figure 7 This is a schematic diagram of the internal structure of the winding drum of the present invention; In the diagram: 1. Sampling cylinder; 2. Cylinder cover; 3. Buoyancy switch assembly; 31. U-shaped fixing block; 32. L-shaped rocker arm; 33. Rotating block; 34. U-shaped connecting block; 35. Rewind drum; 36. Traction rope; 37. Locking block; 38. Rewinding frame; 39. Torsion spring; 310. U-shaped round block; 311. T-shaped slide; 312. Toothed groove; 313. Elastic toothed block; 4. Drainage chamber; 5. Sliding column; 6. Locking groove; 7. Sampling port; 8. Water flow cleaning assembly; 81. Flow guiding chamber; 82. Mounting frame; 83. Rotating shaft; 84. Impeller; 85. Cross cleaning frame; 86. Groove; 9. Lifting lug; 10. Float; 11. First one-way valve; 12. Second one-way valve; 13. Liquid storage chamber; 14. Piston disc; 15. Rubber hose elastic band. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Example 1, as Figure 1 , Figure 3 and Figure 6 As shown in the embodiment of the present invention, an environmental engineering testing water quality sampling device includes a sampling cylinder 1. The sampling cylinder 1 has multiple liquid storage chambers 13 arranged in a ring shape inside. A cylinder cover 2 is installed on the upper end of the sampling cylinder 1, and multiple sliding columns 5 are slidably connected inside the cylinder cover 2. Each sliding column 5 is slidably connected to the liquid storage chamber 13, and can be driven to slide in the liquid storage chamber 13 to draw river water into the liquid storage chamber 13 for storage. A slot 6 is opened on the outer side of the upper end of the sliding column 5. The upper end of the cylinder cover 2 is provided with a buoyancy switch assembly 3, and the buoyancy switch assembly 3 is fixedly connected to the sliding column 5 through the slot 6. The buoyancy switch assembly 3 enables the sampling cylinder 1 to control the opening of the sliding column 5 by water pressure buoyancy after reaching the specified water level inside the river, and then the sliding column 5 slides in the liquid storage chamber 13 to extract the river water at the specified water level for sampling.

[0023] Specifically, in existing technologies, operators typically tie sampling bottles to ropes and then drop the bottles into rivers, lakes, or reservoirs, allowing them to sink under their own weight. The bottles are then pulled to the shore by ropes for retrieval. However, while this method facilitates water collection and the carrying of the sampling equipment, it makes it difficult to perform stratified sampling of water at different depths, leading to inaccurate water quality data. Furthermore, each sampling bottle can only collect water once, resulting in low sampling efficiency.

[0024] In this invention, when sampling river water, the sliding column 5 is pressed down to slide to the bottom of the storage chamber 13, and the buoyancy switch assembly 3 engages with the slot 6 on the outside of the sliding column 5 to fix the sliding column 5. Then, the rope is tied to the sampling tube 1, and the sampling tube 1 is dropped into the river or lake where sampling is required. The sampling tube 1 is equipped with a counterweight, which allows the sampling tube 1 to sink quickly after being dropped into the river or lake using the internal counterweight and its own weight. As the sampling tube 1 continues to sink, after it reaches a specific position, one of the buoyancy switch components 3 is triggered by the buoyancy of the water pressure. The buoyancy switch component 3 then opens the slide column 5, causing the slide column 5 to move and reset quickly, thereby drawing river water from the designated position into the storage chamber 13 for collection. As the sampling tube 1 continues to sink, the remaining buoyancy switch components 3 will also be activated in sequence by the buoyancy of the water pressure, thereby achieving stratified sampling of water bodies at different water levels in rivers or lakes, thus solving the above-mentioned problems.

[0025] like Figure 1 , Figure 6 and Figure 7 As shown, the buoyancy switch assembly 3 includes multiple U-shaped fixing blocks 31 fixed to the upper end of the cylinder cover 2, and the multiple U-shaped fixing blocks 31 are fixed in a ring to the outside of the upper end of the cylinder cover 2. Each U-shaped fixing block 31 has an L-shaped rocker arm 32 rotatably connected to its inner cavity. The L-shaped rocker arm 32 is used to lock and fix the sliding column 5. A rotating block 33 is rotatably connected to one end of the L-shaped rocker arm 32. A U-shaped connecting block 34 is rotatably connected to one end of the rotating block 33. A winding drum 35 is fixed to one end of the U-shaped connecting block 34. A traction rope 36 is wound in the inner cavity of the winding drum 35, and a float ball 10 is fixed to one end of the traction rope 36.

[0026] Specifically, when sampling river or lake water, the sampling tube 1 moves the sliding column 5 to contact the table or ground, then presses the sliding column 5 into the liquid storage chamber 13. After the sliding column 5 has moved to a certain position, the L-shaped rocker arm 32 is inserted into the inner cavity of the slot 6. When the sliding column 5 moves upward to reset, the slot 6 abuts against the L-shaped rocker arm 32, causing it to flip upward. During the flipping process, the L-shaped rocker arm 32 abuts against the tube cover 2 and cannot flip, thus fixing the sliding column 5 in place. Then, the sampling tube 1 is dropped into the river or lake, causing it to sink quickly. After the sampling tube 1 sinks to a specific position... The float 10 floats on the water surface, pulling the traction rope 36 taut. The traction rope 36 then drives the winding drum 35 upward, which in turn drives the U-shaped connecting block 34 to pull the rotating block 33 upward. This causes the rotating block 33 to pull the L-shaped rocker arm 32 upward, causing it to flip. After the L-shaped rocker arm 32 flips upward, its semi-circular shape at the end that abuts against the slot 6 disengages it from the slot. This allows the sliding column 5 to quickly move upward and reset, thus drawing river or lake water from a specific location into the storage chamber 13. Sampling is performed inside the water body. As the sliding column 5 draws water into the storage chamber 13, the weight of the sampling cylinder 1 increases. Simultaneously, the sliding column 5 expels air from the upper part of the storage chamber 13, reducing the buoyancy of the sampling cylinder 1. This causes the sampling cylinder 1 to pull the float 10 to continue sinking to the bottom of the river or lake. As the sampling cylinder 1 continues to sink, another float 10 pulls the traction rope 36 to taut, activating another buoyancy switch assembly 3. This allows the sliding column 5 to draw water from a specific location for sampling, thus achieving the effect of sampling water at different depths. This solves the problem of water quality sampling devices used in existing environmental engineering testing. When sampling rivers or lakes, the presence of significant thermoclines (thermospheres) at different depths, along with substantial differences in dissolved oxygen, pH, nutrients, and chlorophyll a, makes it difficult to capture key phenomena such as oxygen deficiency at the bottom and nutrient accumulation in the thermocline. This can affect water quality test results, especially since heavy metals and organic pollutants often accumulate in interstitial water or bottom sediments. If only surface sampling is performed, the results of water pollution load testing for rivers, lakes, or reservoirs may be inaccurate.

[0027] like Figure 2 , Figures 5 to 7As shown, a winding frame 38 is rotatably connected to the inner cavity of the winding drum 35. A U-shaped block 310 is inserted into one end of the winding frame 38, and the U-shaped block 310 is rotatably connected to the inner wall of the winding frame 38. A torsion spring 39 is inserted into the inner cavity of the U-shaped block 310, and the other end of the torsion spring 39 is fixedly installed to the traction rope 36. A T-shaped groove 311 is formed on the outside of the winding drum 35, and multiple toothed grooves 312 are formed on the inner wall of the T-shaped groove 311. A locking block 37 is slidably connected to the inner cavity of the T-shaped groove 311, and the locking block 37 has teeth on both sides. The elastic toothed block 313 is inserted and meshed with the toothed groove 312. The traction rope 36 is marked with a length mark on the outside to indicate the length of discharge. The traction rope 36 is made of polyester material. One end of the traction rope 36 is fixedly connected to the outside of the winding frame 38. The sliding column 5 is fixedly connected to the piston plate 14 at one end of the liquid storage chamber 13. The piston plate 14 is provided with a first one-way valve 11. The sliding column 5 is provided with a discharge chamber 4. Two rubber tubes 15 are installed on the upper end of the piston plate 14, and one end of the two rubber tubes 15 is fixedly connected to the cylinder cover 2.

[0028] Specifically, before sampling river or lake water, the sliding column 5 is pressed into the bottom of the storage chamber 13, causing the sliding column 5 to drive the piston disc 14 to pull the rubber tube elastic band 15, tautning the rubber tube elastic band 15. This causes the L-shaped rocker arm 32 to engage with the slot 6 to abut and lock the sliding column 5. Then, the traction rope 36 is pulled out from the inner cavity of the winding drum 35, causing the traction rope 36 to drive the winding frame 38 to rotate, which in turn drives the torsion spring 39 to rotate. The operator observes the length of the traction rope 36 pulled out according to the length markings on its exterior, and then pushes the locking block 37 to slide into the inner cavity of the T-shaped groove 311 to compress the traction rope 36. When the elastic tooth block 313 springs up and engages with the tooth groove 312, it fixes the traction rope 36, thus facilitating the sampling cylinder 1 to collect samples of river or lake water at that depth according to the length pulled out by the traction rope 36. This solves the problem that existing environmental engineering water quality sampling devices cannot simultaneously collect samples of river or lake water at different depths, making it difficult to accurately locate the main water layer where pollutants are located. In particular, water plant intakes are usually located at a specific depth. Layered sampling can effectively ensure the selection of the optimal water quality layer, avoiding surface algae or bottom iron and manganese exceeding the standard, thus improving the practicality of the sampling device.

[0029] Example 2, as Figures 2 to 4 As shown, the sampling tube 1 is equipped with a water flow cleaning component 8, which can reduce the resistance of the river water, allowing the sampling tube 1 to sink vertically and quickly. At the same time, it can also use the force of the water flow to move and clean up garbage and other debris in the river water near the lower end of the sampling tube 1.

[0030] Specifically, after the sampling tube 1 is dropped into the river or lake, it sinks rapidly. During the sinking process, the river or lake water quickly passes through the water flow cleaning component 8, thus ensuring that the sampling tube 1 can sink vertically and stably. Moreover, the river or lake water will also impact the operation of the water flow cleaning component 8, causing the water flow cleaning component 8 to move and clean up garbage and other debris in the river or lake water near the lower end of the sampling tube 1, preventing garbage and other debris in the river or lake water near the lower end of the sampling tube 1 from clogging the sampling port 7.

[0031] like Figure 3 and Figure 4 As shown, the water flow cleaning assembly 8 includes a guide cavity 81 inside the sampling cylinder 1, and the lower opening diameter of the guide cavity 81 is relatively large, which can quickly guide the flow of river water in the guide cavity 81, so that the sampling cylinder 1 can sink vertically and quickly. A mounting frame 82 is fixedly connected to the inner cavity of the guide cavity 81, and a rotating shaft 83 is rotatably connected inside the mounting frame 82. The upper end of the rotating shaft 83 is rotatably connected to the cylinder cover 2. A cross cleaning frame 85 is fixedly connected to the lower end of the rotating shaft 83. Multiple impellers 84 are fixedly connected to the outside of the rotating shaft 83. A groove 86 is opened at the lower end of the sampling cylinder 1. The mounting frame 82 is fixedly connected to the inner cavity of the groove 86 by strong magnetic adsorption. Multiple sampling ports 7 are opened at the lower end of the sampling cylinder 1, and the sampling ports 7 are connected to the liquid storage chamber 13. A second one-way valve 12 is provided in the inner cavity of the sampling port 7. A lifting lug 9 is fixedly connected to the upper end of the cylinder cover 2.

[0032] Specifically, after the sampling cylinder 1 is dropped into the river or lake, as it sinks, the river or lake water enters the guide cavity 81. The water then impacts the impeller 84, causing it to rotate. This rotation drives the rotating shaft 83, which in turn rotates the cross-shaped cleaning frame 85. The cross-shaped cleaning frame 85 is in contact with the lower end of the sampling cylinder 1. During its rotation, the frame scrapes and cleans the sampling port 7, and simultaneously removes debris and other contaminants from the river or lake water near the lower end of the sampling cylinder 1. This prevents debris from interfering with the sampling cylinder's ability to collect water samples. The larger opening diameter allows for rapid guidance of river water through the guide cavity 81 in conjunction with the rotation of the impeller 84, enabling the sampling tube 1 to sink vertically and quickly. This ensures that the sampling tube 1, in conjunction with the buoyancy switch assembly 3, can sample the water layer to be collected, improving the accuracy of the sampling device in collecting water from the water layer. This solves the problem that existing environmental engineering testing water quality sampling devices, when sampling river or lake water, often encounter the issue of difficulty in cleaning up garbage and other debris in the river or lake water. As a result, when water is drawn from the sampling port 7, garbage and other debris in the river or lake water located at the sampling port 7 are attracted and accumulate at the sampling port 7, causing blockage of the sampling port 7.

[0033] The working principle is as follows: The sampling cylinder 1 moves the sliding column 5 to contact the table or ground. Then, the sliding column 5 is pressed into the liquid storage chamber 13. After the sliding column 5 reaches its sliding position, the L-shaped rocker arm 32 inserts into the slot 6. When the sliding column 5 moves upward to reset, the slot 6 abuts against the L-shaped rocker arm 32, causing it to flip upward. During this flipping process, the L-shaped rocker arm 32 abuts against the cylinder cover 2 and cannot flip, thus fixing the sliding column 5 in place. The sampling cylinder 1 is then dropped into a river or lake, causing it to sink quickly. After the sampling cylinder 1 reaches a specific position, the float 10 floats on the surface, pulling the traction rope 36 taut. The traction rope 36 then moves the winding drum 35 upward. Simultaneously, the winding drum 35 moves the U-shaped connecting block 34, pulling the rotating block 33 upward. This causes the rotating block 33 to pull the L-shaped rocker arm 32 upward, thus... After the L-shaped rocker arm 32 is flipped upwards, the end of the L-shaped rocker arm 32 that abuts against the slot 6 is set in a semi-circular arc shape, thereby disengaging the L-shaped rocker arm 32 from the slot 6. Then, the slide column 5 moves upwards and resets, allowing the slide column 5 to draw river or lake water from a specific location into the storage chamber 13 for sampling. As the slide column 5 draws water into the storage chamber 13, the weight of the sampling cylinder 1 increases. At the same time, the slide column 5 expels the air from the upper part of the storage chamber 13, reducing the buoyancy of the sampling cylinder 1. This causes the sampling cylinder 1 to pull the float 10 to continue sinking to the bottom of the river or lake. As the sampling cylinder 1 continues to sink, another float 10 pulls the traction rope 36 to tautness and activates another buoyancy switch assembly 3, allowing the slide column 5 to draw water from a specific location for sampling, thereby achieving the effect of sampling water at different depths. After the sampling tube 1 is dropped into the river or lake, as it sinks, the river or lake water enters the guide cavity 81. The water then impacts the impeller 84, causing it to rotate. This rotation drives the rotating shaft 83, which in turn rotates the cross-shaped cleaning frame 85. The cross-shaped cleaning frame 85 is in contact with the lower end of the sampling tube 1. During its rotation, the frame scrapes and cleans the sampling port 7, removing debris and other contaminants from the river or lake near the lower end of the sampling tube 1. This prevents the debris from interfering with the sampling tube's ability to collect water samples. The large opening diameter of the guide cavity 81 allows for rapid guidance of the water flow within the cavity, enabling the sampling tube 1 to sink vertically and quickly, thus improving sampling efficiency.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water quality sampling device for environmental engineering testing, characterized in that: The sample includes a sampling tube (1), which has multiple storage chambers (13) arranged in a ring shape inside. A tube cover (2) is installed on the upper end of the sampling tube (1), and multiple sliding columns (5) are slidably connected inside the tube cover (2). Each sliding column (5) is slidably connected to the storage chamber (13), and can be driven to slide in the storage chamber (13) to draw river water into the storage chamber (13) for storage. A slot (6) is provided on the outer side of the upper end of the sliding column (5). The upper end of the cylinder cover (2) is provided with a buoyancy switch assembly (3), and the buoyancy switch assembly (3) is fixedly connected to the slide column (5) through the slot (6). The buoyancy switch assembly (3) enables the sampling cylinder (1) to open the slide column (5) by using water pressure buoyancy after reaching the specified water level inside the river, and then make the slide column (5) slide in the liquid storage chamber (13) to extract the river water at the specified water level for sampling.

2. The water quality sampling device for environmental engineering testing according to claim 1, characterized in that: The buoyancy switch assembly (3) includes a plurality of U-shaped fixing blocks (31) fixed to the upper end of the cylinder cover (2), and the plurality of U-shaped fixing blocks (31) are fixed in a ring to the outside of the upper end of the cylinder cover (2). Each U-shaped fixing block (31) has an L-shaped rocker arm (32) rotatably connected to its inner cavity. The L-shaped rocker arm (32) is used to engage and fix the sliding column (5).

3. The water quality sampling device for environmental engineering testing according to claim 2, characterized in that: The L-shaped rocker arm (32) is rotatably connected to a rotating block (33) at one end, and a U-shaped connecting block (34) is rotatably connected to one end of the rotating block (33). A winding drum (35) is fixedly connected to one end of the U-shaped connecting block (34). A traction rope (36) is wound inside the winding drum (35), and a float (10) is fixedly connected to one end of the traction rope (36).

4. The water quality sampling device for environmental engineering testing according to claim 3, characterized in that: The inner cavity of the winding drum (35) is rotatably connected to a winding frame (38). A U-shaped block (310) is inserted into one end of the winding frame (38), and the U-shaped block (310) is rotatably connected to the inner wall of the winding frame (38). A torsion spring (39) is inserted into the inner cavity of the U-shaped block (310), and the other end of the torsion spring (39) is fixedly installed with the traction rope (36).

5. The water quality sampling device for environmental engineering testing according to claim 4, characterized in that: The winding drum (35) has a T-shaped groove (311) on its outside, and the inner wall of the T-shaped groove (311) has multiple toothed grooves (312). The inner cavity of the T-shaped groove (311) is slidably connected to a locking block (37), and elastic toothed blocks (313) are provided on both sides of the locking block (37). The elastic toothed blocks (313) are inserted and engaged with the toothed grooves (312). The traction rope (36) has a length mark engraved on its outside to indicate the length of the discharge. The traction rope (36) is made of polyester material, and one end of the traction rope (36) is fixedly connected to the outside of the winding frame (38).

6. The water quality sampling device for environmental engineering testing according to claim 1, characterized in that: The slide column (5) is fixedly connected to a piston plate (14) at one end of the liquid storage chamber (13). A first one-way valve (11) is provided inside the piston plate (14). A drain chamber (4) is opened inside the slide column (5). Two rubber tubes (15) are installed on the upper end of the piston plate (14), and one end of the two rubber tubes (15) is fixedly connected to the cylinder cover (2).

7. The water quality sampling device for environmental engineering testing according to claim 1, characterized in that: The sampling tube (1) is equipped with a water flow cleaning component (8), which can reduce the resistance of the river water, make the sampling tube (1) sink vertically and quickly, and can also use the force of the water flow to move and clean up the garbage and other debris in the river water near the lower end of the sampling tube (1).

8. The water quality sampling device for environmental engineering testing according to claim 7, characterized in that: The water flow cleaning component (8) includes a guide cavity (81) inside the sampling tube (1), and the lower opening diameter of the guide cavity (81) is large, which can quickly guide the flow of river water in the guide cavity (81) so that the sampling tube (1) can sink vertically and quickly.

9. The water quality sampling device for environmental engineering testing according to claim 8, characterized in that: The inner cavity of the guide cavity (81) is fixedly connected to the mounting bracket (82), and the mounting bracket (82) is rotatably connected to the rotating shaft (83). The upper end of the rotating shaft (83) is rotatably connected to the cylinder cover (2), and the lower end of the rotating shaft (83) is fixedly connected to the cross cleaning frame (85). Multiple impellers (84) are fixedly connected to the outside of the rotating shaft (83). The lower end of the sampling cylinder (1) is provided with a groove (86), and the inner cavity of the groove (86) is fixedly connected to the mounting bracket (82) by strong magnetic attraction.

10. The water quality sampling device for environmental engineering testing according to claim 1, characterized in that: The sampling cylinder (1) has multiple sampling ports (7) at its lower end, and the sampling ports (7) are connected to the liquid storage chamber (13). The inner cavity of the sampling port (7) is provided with a second one-way valve (12), and the upper end of the cylinder cover (2) is fixed with a lifting lug (9).

Images