Sampling device for hydraulic engineering detection

Abstract

The invention relates to a sampling device for water conservancy project detection, and belongs to the technical field of water conservancy project detection sampling, the sampling device for water conservancy project detection comprises an outer sleeve, a hanging rack and a hanging ring, and also comprises a sampling mechanism; a water pressure driving mechanism; a position adjusting mechanism; and a scraping mechanism. Through the arrangement of the sampling barrel with the adjustable position, during adjustment, the sampling barrel can move up and down along the inner surface of the outer sleeve under the action of a limiting rod and a limiting groove only by rotating a position adjusting screw rod, in the adjustment process, the sampling barrel is always sealed with the outer sleeve, and after adjustment is completed and the sampling device is placed in water, the sampling barrel can move up and down along the inner surface of the outer sleeve. Water enters the space between the top of the sampling barrel and the top of the outer sleeve, and the air pressures in the space formed by the bottom of the sampling barrel and the inner bottom of the outer sleeve are different, so that the water entering sampling depth of the sampling device is changed, the sampling device can sample water at different depths conveniently, the sampling range of the sampling device is expanded, and the sampling efficiency is improved. The use is convenient.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy engineering testing and sampling technology, specifically relating to a sampling device for water conservancy engineering testing. Background Technology

[0002] Water quality sampling is a crucial step in the quality control, environmental monitoring, and operation management of water conservancy projects. The accuracy of the results directly depends on the standardization and scientific nature of the sampling. In water conservancy projects, water quality sampling typically serves the following purposes: Environmental impact assessment during construction: monitoring the impact of construction activities (such as cofferdams, diversions, concrete pouring, and domestic sewage) on surrounding water bodies; Source water quality verification: verifying whether the source water quality meets design requirements and intended use before the construction of reservoirs, water supply projects, etc.; Engineering entity quality testing: testing the water quality used for backfilling, grouting, curtain grouting, etc., to ensure that it does not have a harmful impact on engineering materials and foundations; Operational water quality monitoring: for reservoirs, hydropower stations, etc., long-term monitoring of water quality in the reservoir area, upstream of the dam, downstream of the dam, and downstream water bodies to assess ecological risks such as eutrophication and heavy metal accumulation; Completion acceptance: proving that the water quality within the affected area meets the standards of environmental protection departments and design requirements after the project is completed.

[0003] Currently, existing water sampling devices can only sample water from one fixed location at a time. When sampling water at different depths, multiple sampling operations are required. However, existing sampling devices open the sampling port under certain water pressure, resulting in a fixed sampling depth and a small sampling range. Therefore, a sampling device for water conservancy engineering testing is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a reasonably designed sampling device for testing water conservancy projects in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions: A sampling device for water conservancy engineering testing includes an outer sleeve and a bracket fixedly connected to the top of the outer sleeve by bolts. A hanging ring is fixedly connected to the top of the bracket. The device also includes: A sampling mechanism is slidably connected inside an outer sleeve. The sampling mechanism includes a sampling cylinder slidably connected inside an outer sleeve. The sampling cylinder has multiple sampling slots. An inlet communicating with the inside of the sampling slots is fixedly connected to the sampling cylinder. An adjustment screw is rotatably connected to the top of the sampling cylinder. The adjustment screw is connected to the bracket by a thread. A water pressure drive mechanism that is fixedly connected to the outer sleeve; Rotary adjustment mechanism connected inside the outer sleeve, the adjustment mechanism being used to open different water inlets; A sealing, rotating scraping mechanism is connected to the outer sleeve.

[0006] As a further optimization of the present invention, a limiting rod is fixedly connected inside the outer sleeve, and a limiting groove is formed on the outer surface of the sampling cylinder, wherein the limiting groove and the limiting rod are in a sealed sliding connection.

[0007] As a further optimization of the present invention, the outer sleeve is provided with a groove, and a filter screen is fixedly connected to the part of the outer sleeve with the groove. The water inlet is located in the groove and is positioned directly opposite the filter screen. The length of the sampling tube is longer than the length of the filter screen.

[0008] As a further optimization of the present invention, the adjusting mechanism includes a first spline shaft rotatably connected inside the outer sleeve, a gear fixedly connected to the outer surface of the first spline shaft, a first spline sleeve slidably connected to the outer surface of the first spline shaft, an adjusting plate threadedly connected to the first spline sleeve, and a through hole provided on the adjusting plate.

[0009] As a further optimization of the present invention, the sampling cylinder is provided with a through groove, the adjusting plate is slidably connected to the through groove in a sealed manner, and the first spline sleeve is rotatably connected to the bottom of the sampling cylinder.

[0010] As a further optimization of the present invention, the water pressure drive mechanism includes a fixed pipe fixedly connected to the outer sleeve, a screen fixedly connected to the inlet end of the fixed pipe, a one-way valve installed inside the fixed pipe, a retaining ring fixedly connected inside the fixed pipe, the one-way valve located between the retaining ring and the screen, a drive plate slidably connected inside the fixed pipe, a toothed rod fixedly connected to one side of the drive plate, a positioning rod fixedly connected to the inner bottom of the outer sleeve, the positioning rod slidably connected to the toothed rod, a stop bracket fixedly connected inside the fixed pipe, a stop spring fixedly connected to the stop bracket, and one end of the stop spring fixedly connected to the drive plate.

[0011] As a further optimization of the present invention, a drain pipe is fixedly connected to the bottom of the fixed pipe, the drain pipe is located between the one-way valve and the retaining ring, and the toothed rod meshes with the gear.

[0012] As a further optimization of the present invention, the scraping mechanism includes a second spline sleeve rotatably connected inside the sampling cylinder, an impeller fixedly connected to the outer surface of the second spline sleeve, a second spline shaft slidably connected to the inner surface of the second spline sleeve, a rotating shaft fixedly connected to the bottom of the second spline shaft, a conical block fixedly connected to the bottom of the rotating shaft, and a scraping frame fixedly connected to the outer surface of the rotating shaft.

[0013] As a further optimization of the present invention, the rotating shaft is rotatably connected to the outer sleeve, and multiple impellers are provided, each located in a multiple sampling slot, with the impellers facing the water inlet.

[0014] As a further optimization of the present invention, the scraping frame is attached to the outer surface of the filter screen, and the scraping frame is attached to the screen.

[0015] The beneficial effects of this invention are as follows: 1. This invention features an adjustable sampling cylinder. During adjustment, simply rotating the adjusting screw allows the sampling cylinder to move up and down along the inner surface of the outer sleeve under the action of the limiting rod and the limiting groove. During the adjustment process, the sampling cylinder remains sealed to the outer sleeve. After adjustment, when the sampling device is placed in water, water will enter the space between the top of the sampling cylinder and the top of the outer sleeve. Due to the difference in air pressure between the bottom of the sampling cylinder and the bottom of the inner sleeve, the water immersion sampling depth of the sampling device is changed, facilitating sampling operations at different water depths and expanding the sampling range of the device, making it convenient to use.

[0016] 2. The present invention, through the setting of the water pressure drive mechanism, causes changes in the air pressure in the space formed by the outer sleeve and the bottom of the sampling cylinder due to the adjustment of the sampling cylinder position, and the different diameter retaining springs, thereby changing the water pressure required by the water pressure drive mechanism. This allows the sampling device to open the corresponding water inlet under a fixed water pressure, facilitating water sampling at different depths. Furthermore, after sampling at the first sampling position, the increased weight of the sampling device allows it to quickly descend to the second sampling position for convenient sampling.

[0017] 3. This invention uses a scraping mechanism to clean the screen and filter, preventing aquatic plants from getting tangled in them. This prevents water from carrying some aquatic plants into the sampling tank during water sampling. Additionally, aquatic plants tangled in the filter may break under the suction of the water flow, causing their sap to enter the water and affecting the accuracy of water quality testing. This ensures the accuracy of the test. Since water is sampled from a single sampling tank each time, the sampling of one tank drives the impellers in other sampling tanks to rotate, agitating the water and ensuring its uniformity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall frontal three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the outer sleeve of the present invention; Figure 3 This is a three-dimensional structural diagram of the sampling mechanism and water pressure driving mechanism of the present invention; Figure 4 This is a three-dimensional bottom structure diagram of the sampling mechanism and water pressure driving mechanism of the present invention; Figure 5 This is a three-dimensional structural diagram of the adjustment mechanism of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the present invention. Figure 7 This is a three-dimensional partial cross-sectional structural diagram of the scraping mechanism of the present invention.

[0019] In the diagram: 1. Outer sleeve; 2. Hanger; 3. Hanging ring; 4. Filter screen; 5. Limiting rod; 6. Groove; 7. Sampling mechanism; 71. Sampling cylinder; 72. Adjusting screw; 73. Limiting groove; 74. Sampling groove; 75. Sealing plug; 76. Water inlet; 77. Through groove; 78. Vent; 8. Water pressure drive mechanism; 81. Fixed pipe; 82. Screen; 83. Check valve; 84. Retaining ring; 85. Drive Plate; 86. Toothed rod; 87. Positioning rod; 88. Drain pipe; 89. Stop; 810. Stop spring; 9. Adjustment mechanism; 91. First splined shaft; 92. Gear; 93. First splined sleeve; 94. Adjustment plate; 95. Through hole; 10. Scraping mechanism; 101. Second splined sleeve; 102. Impeller; 103. Second splined shaft; 104. Rotating shaft; 105. Conical block; 106. Scraping frame. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, a sampling device for water conservancy engineering testing includes an outer sleeve 1 and a bracket 2 fixedly connected to the top of the outer sleeve 1 by bolts. The bolts facilitate the assembly and disassembly of the bracket 2. A hanging ring 3 is fixedly connected to the top of the bracket 2 for connecting a pull rope, facilitating the placement or removal of the sampling device from the water. A sampling mechanism 7 is slidably connected inside the outer sleeve 1. The sampling mechanism 7 includes a sampling cylinder 71 slidably connected inside the outer sleeve 1. Multiple sealing plugs 75 are sealed on the sampling cylinder 71. Three sampling slots 74 are formed inside the sampling cylinder 71. Water inlets 76, communicating with the inside of the sampling slots 74, are fixedly connected to the sampling cylinder 71. There are three water inlets 76, each corresponding to one of the three sampling slots 74, and the three water inlets 76 are staggered and layered. The water inlets 76 are located on one of the sampling slots 74. A one-way valve is installed at the end of the sampling cylinder 71, so that water can only enter the sampling tank 74 through the inlet 76. An exhaust port 78 is opened on the sampling cylinder 71, which communicates with the inside of the sampling tank 74. A one-way valve is installed in the end of the exhaust port 78 that is fixedly connected to the sampling tank 74, so that the gas in the sampling tank 74 can only be discharged through the exhaust port 78, thereby facilitating the water intake of the sampling tank 74. An adjustment screw 72 is rotatably connected to the top of the sampling cylinder 71. The adjustment screw 72 is connected to the bracket 2 by threads. A limit rod 5 is fixedly connected inside the outer sleeve 1. A limit groove 73 is opened on the outer surface of the sampling cylinder 71. The limit groove 73 and the limit rod 5 are connected in a sealed sliding connection. A groove 6 is opened on the outer sleeve 1. A filter screen 4 is fixedly connected to the part of the outer sleeve 1 where the groove 6 is opened. The inlet 76 is located in the groove 6 and is set directly opposite the filter screen 4. The length of the sampling cylinder 71 is longer than the length of the filter screen 4.

[0022] In use, the height of the sampling cylinder 71 inside the outer sleeve 1 is adjusted according to the sampling depth. During adjustment, the adjusting screw 72 is rotated, causing the sampling cylinder 71 to move up and down along the inner surface of the outer sleeve 1 under the action of the limiting rod 5 and the limiting groove 73. During the adjustment process, the sampling cylinder 71 is always sealed to the outer sleeve 1. After the adjustment is completed, the sampling device is placed in water. Water will enter through the gap between the top of the sampling cylinder 71 and the top of the outer sleeve 1. Due to the difference in air pressure in the space formed by the bottom of the sampling cylinder 71 and the bottom of the inner sleeve 1, the water immersion sampling depth of the sampling device is changed, which facilitates the sampling operation of the sampling device at different depths, expands the sampling range of the sampling device, and makes it easy to use.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, a water pressure drive mechanism 8 is fixedly connected to the outer sleeve 1. The water pressure drive mechanism 8 includes a fixed pipe 81 fixedly connected to the outer sleeve 1. A screen 82 is fixedly connected to the inlet end of the fixed pipe 81. A one-way valve 83 is installed inside the fixed pipe 81, so that water can only enter the outer sleeve 1 through the fixed pipe 81. A retaining ring 84 is fixedly connected inside the fixed pipe 81. The one-way valve 83 is located between the retaining ring 84 and the screen 82. A drive plate 85 is slidably connected inside the fixed pipe 81. A toothed rod 86 is fixedly connected to one side of the drive plate 85. The inner bottom of the outer sleeve 1 is fixed. A positioning rod 87 is connected, and the positioning rod 87 is slidably connected to the toothed rod 86. A drain pipe 88 is fixedly connected to the bottom of the fixed pipe 81. A pipe cap is installed at the bottom of the drain pipe 88 to facilitate drainage and reset the drive plate 85. The drain pipe 88 is located between the one-way valve 83 and the retaining ring 84. A retaining bracket 89 is fixedly connected inside the fixed pipe 81. A retaining spring 810 is fixedly connected to the retaining bracket 89. One end of the retaining spring 810 is fixedly connected to the drive plate 85. There are three retaining springs 810, and the three retaining springs 810 are made of the same material and their diameters gradually increase. A rotating connection is made inside the outer sleeve 1. Adjustment mechanism 9, used to open different water inlets 76, includes a first splined shaft 91 rotatably connected inside the outer sleeve 1, a gear 92 fixedly connected to the outer surface of the first splined shaft 91, a toothed rod 86 meshing with the gear 92, a first splined sleeve 93 slidably connected to the outer surface of the first splined shaft 91, the first splined sleeve 93 rotatably connected to the bottom of the sampling cylinder 71, an adjustment plate 94 threadedly connected to the first splined sleeve 93, a through groove 77 opened on the sampling cylinder 71, the adjustment plate 94 and the through groove 77 being slidably and sealingly connected, the adjustment plate 94... The device has through holes 95 and three sets of adjustment mechanisms 9. There are three adjustment plates 94. The through holes 95 on the three adjustment plates 94 are raised sequentially. The through holes 95 at different heights are used to open or close the water inlets 76 at different heights. Since the diameters of the three retaining springs 810 are different, the sampling device will need to be at different depths after entering the water in order for the water pressure to push the drive plate 85 to move. This will allow the through holes 95 at different heights to be aligned with the water inlets 76 at different heights, so that the sampling tanks 74 at different heights can perform water sampling operations at different depths.

[0024] When using, such as Figure 1As shown, the space formed by the sampling cylinder 71 and the outer sleeve 1 is at normal atmospheric pressure, which is the minimum sampling depth. When the sampling cylinder 71 moves downward, it compresses the gas in the space formed by the sampling cylinder 71 and the outer sleeve 1, increasing the air pressure in that space. This requires the drive plate 85 to move inward under greater water pressure. When adjusting the position of the sampling cylinder 71, the first spline sleeve 93 slides downward along the outer surface of the first spline shaft 91. When the sampling device is lowered to the first sampling position, the water pressure overcomes the internal air pressure and the minimum diameter retaining spring 810, pushing the drive plate 85 inward along the fixed tube 81, pushing the toothed rod 86 inward, and thus driving the same side of the adjustment mechanism 9 to work, causing the gear 92 to drive the first spline shaft 91 to rotate. The first spline sleeve 93 rotates, causing the adjusting plate 94 to slide upward along the inner surface of the through groove 77 under the rotation of the first spline sleeve 93. This allows the through hole 95 to reach the location of the water inlet 76 located below, so that the water in the first sampling position enters the sampling groove 74 located below through the water inlet 76 located below. During this process, the first spline sleeve 93 continues to rotate until the through hole 95 moves upward and passes through the water inlet 76 located below. At this time, the sampling groove 74 located below will complete the sampling operation of the water in the first sampling position. After the sampling time is reached, the sampling device is lowered to the second position, and the drive plate 85 continues to move inward until it reaches the baffle 89. During this process, the adjusting plate 94 on this side continues to move upward, causing the through hole 95 to be misaligned with the water inlet 76 located below, thus blocking the water inlet 76. Upon reaching the second sampling position, the water pressure will overcome the internal air pressure and the medium-diameter retaining spring 810. At this time, the drive plate 85 will move inward along the fixed pipe 81 under the action of water pressure, pushing the toothed rod 86 inward, thereby driving a set of adjusting mechanisms 9 on the same side to work, causing the gear 92 to drive the first spline shaft 91 to rotate, driving the first spline sleeve 93 to rotate, thereby causing the adjusting plate 94 to slide upward along the inner surface of the through groove 77 under the action of the rotation of the first spline sleeve 93, so that the through hole 95 reaches the position of the water inlet 76 located in the middle, so that the water in the second sampling position enters the sampling tank 74 located in the middle through the water inlet 76 located in the middle. During the process, the first spline sleeve 93 continues to rotate until the through hole 95 moves upward through the water inlet 76 in the middle. At this time, the sampling slot 74 in the middle will complete the sampling operation of the water in the second sampling position. When the sampling time is reached, the sampling device continues to be lowered to the third sampling position. The drive plate 85 continues to move inward and moves to the baffle 89. During this process, the adjustment plate 94 on this side continues to move upward, so that the through hole 95 is misaligned with the water inlet 76 in the middle, blocking the water inlet 76. This process is repeated until all the sampling slots 74 in the sampling mechanism 7 have completed the sampling of water. At this time, due to the setting of the one-way valve 83, the water in the fixed pipe 81 will not be able to be discharged. After sampling is completed, when it is necessary to remove the sampling mechanism 7, first open the tube cover so that the water that has entered the fixed tube 81 can be discharged through the drain pipe 88. At this time, the drive plate 85 will be reset under the air pressure in the space formed by the outer sleeve 1 and the sampling tube 71 and the action of the retaining spring 810, so that it can be used next time.

[0025] like Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, a scraping mechanism 10 is rotatably connected to the outer sleeve 1. The scraping mechanism 10 includes a second spline sleeve 101 rotatably connected inside the sampling cylinder 71. An impeller 102 is fixedly connected to the outer surface of the second spline sleeve 101. Multiple impellers 102 are provided and are located in multiple sampling slots 74 respectively. The impellers 102 are positioned directly opposite the water inlet 76. A second spline shaft 103 is slidably connected to the inner surface of the second spline sleeve 101. When adjusting the height of the sampling cylinder 71, the second spline shaft 103... The spline sleeve 101 slides downward along the outer surface of the second spline shaft 103. The bottom of the second spline shaft 103 is fixedly connected to a rotating shaft 104. The rotating shaft 104 is rotatably connected to the outer sleeve 1. The bottom of the rotating shaft 104 is fixedly connected to a conical block 105. The conical block 105 is designed to facilitate the entry of the sampling device into water. The outer surface of the rotating shaft 104 is fixedly connected to a scraper 106. The scraper 106 is in contact with the outer surface of the filter screen 4 and the sieve 82.

[0026] When water enters the sampling tank 74 through the inlet 76, the water flow will impact the impeller 102, causing the impeller 102 to rotate and drive the second spline sleeve 101 to rotate, which in turn drives the second spline shaft 103 to rotate. This, in turn, drives the scraper 106 to rotate through the rotating shaft 104, cleaning the screen 82 and filter screen 4. This prevents aquatic plants from getting tangled on the screen 82 and filter screen 4. When sampling water, this also prevents the water flow from carrying some aquatic plants into the sampling tank 74, which would cause the sap of the aquatic plants to enter the water body and affect the accuracy of the water body detection, thus ensuring the accuracy of the detection. In addition, since water is sampled in a single sampling tank 74 each time, when the sampling tank 74 takes water, it will drive the impeller 102 in other sampling tanks 74 to rotate, agitate the water, and ensure the uniformity of the water.

[0027] The specific working principle of this invention is as follows: When using, such as Figure 1As shown, the space formed by the sampling tube 71 and the outer sleeve 1 is under normal atmospheric pressure, which is the minimum sampling depth. The height of the sampling tube 71 inside the outer sleeve 1 is adjusted according to the sampling depth. During adjustment, simply rotate the adjusting screw 72 to allow the sampling tube 71 to move up and down along the inner surface of the outer sleeve 1 under the action of the limiting rod 5 and the limiting groove 73. During the adjustment process, the sampling tube 71 is always sealed to the outer sleeve 1. After the adjustment is completed, when the sampling device is placed in water, water will enter the space between the top of the sampling tube 71 and the top of the outer sleeve 1. Due to the difference in air pressure in the space formed by the bottom of the sampling tube 71 and the bottom of the inner sleeve 1, the water immersion sampling depth of the sampling device is changed, which facilitates the sampling operation of the sampling device at different depths, expands the sampling range of the sampling device, and makes it easy to use. When the sampling cylinder 71 moves downward, it compresses the gas in the space formed by the outer sleeve 1 and the bottom of the sampling cylinder 71, increasing the air pressure in this space. This requires the drive plate 85 to move inward under greater water pressure. Furthermore, when adjusting the position of the sampling cylinder 71, the first spline sleeve 93 slides downward along the outer surface of the first spline shaft 91. When the sampling device is lowered to the first sampling position, the water pressure overcomes the internal air pressure and the minimum diameter retaining spring 810, pushing the drive plate 85 inward along the fixed tube 81, pushing the toothed rod 86 inward, and thus driving a set of adjusting mechanisms 9 on the same side to work. This causes the gear 92 to rotate the first spline shaft 91, which in turn rotates the first spline sleeve 93, thereby causing the adjusting plate 94 to... Under the rotation of the first spline sleeve 93, it slides upward along the inner surface of the through groove 77, so that the through hole 95 reaches the position of the water inlet 76 located below, so that the water in the first sampling position enters the sampling groove 74 located below through the water inlet 76 located below. During this process, the first spline sleeve 93 continues to rotate until the through hole 95 moves upward and passes through the water inlet 76 located below. At this time, the sampling groove 74 located below will complete the sampling operation of the water in the first sampling position. After the sampling time is reached, the sampling device is lowered to the second position, and the drive plate 85 continues to move inward and moves to the baffle 89. During this process, the adjusting plate 94 on this side continues to move upward, so that the through hole 95 is misaligned with the water inlet 76 located below, blocking the water inlet 76. Upon reaching the second sampling position, the water pressure will overcome the internal air pressure and the medium-diameter retaining spring 810. At this time, the drive plate 85 will move inward along the fixed pipe 81 under the action of water pressure, pushing the toothed rod 86 inward, thereby driving a set of adjusting mechanisms 9 on the same side to work, causing the gear 92 to drive the first spline shaft 91 to rotate, driving the first spline sleeve 93 to rotate, thereby causing the adjusting plate 94 to slide upward along the inner surface of the through groove 77 under the action of the rotation of the first spline sleeve 93, so that the through hole 95 reaches the position of the water inlet 76 located in the middle, so that the water in the second sampling position enters the sampling tank 74 located in the middle through the water inlet 76 located in the middle. During the process, the first spline sleeve 93 continues to rotate until the through hole 95 moves upward through the water inlet 76 in the middle. At this time, the sampling slot 74 in the middle will complete the sampling operation of the water in the second sampling position. When the sampling time is reached, the sampling device continues to be lowered to the third sampling position. The drive plate 85 continues to move inward and moves to the baffle 89. During this process, the adjustment plate 94 on this side continues to move upward, so that the through hole 95 is misaligned with the water inlet 76 in the middle, blocking the water inlet 76. This process is repeated until all the sampling slots 74 in the sampling mechanism 7 have completed the sampling of water. At this time, due to the setting of the one-way valve 83, the water in the fixed pipe 81 will not be able to be discharged. Meanwhile, when water enters the sampling tank 74 through the inlet 76, the water flow will impact the impeller 102, causing the impeller 102 to rotate and drive the second spline sleeve 101 to rotate, which in turn drives the second spline shaft 103 to rotate. This, in turn, drives the scraper 106 to rotate through the rotating shaft 104, cleaning the screen 82 and the filter screen 4. This prevents aquatic plants from getting tangled on the screen 82 and the filter screen 4, thus preventing the water flow from carrying some aquatic plants into the sampling tank 74 during water sampling. At the same time, the aquatic plants tangled on the filter screen 4 may also be damaged under the suction of the water flow, causing the sap of the aquatic plants to enter the water body, affecting the accuracy of water body detection, thereby ensuring the accuracy of the detection. In addition, since water is sampled in a single sampling tank 74 each time, when the sampling tank 74 takes water, it will drive the impeller 102 in other sampling tanks 74 to rotate, agitate the water, and ensure the uniformity of the water. After sampling is completed, when it is necessary to remove the sampling mechanism 7, first open the tube cover so that the water that has entered the fixed tube 81 can be discharged through the drain pipe 88. At this time, the drive plate 85 will be reset under the air pressure in the space formed by the outer sleeve 1 and the sampling tube 71 and the action of the retaining spring 810, so that it can be used next time. Then the bracket 2 can be removed and the sampling tube 71 can be pulled out from the outer sleeve 1. The corresponding sealing plugs 75 can be opened in sequence to drain the water in the sampling tube 71, so that water samples from different locations can be obtained, which is convenient for testing water bodies at different locations.

[0028] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A sampling device for testing water conservancy projects, comprising an outer sleeve (1) and a bracket (2) fixedly connected to the top of the outer sleeve (1) by bolts, wherein a hanging ring (3) is fixedly connected to the top of the bracket (2), characterized in that, Also includes: A sampling mechanism (7) is sealed and slidably connected inside the outer sleeve (1). The sampling mechanism (7) includes a sampling cylinder (71) sealed and slidably connected inside the outer sleeve (1). Multiple sampling slots (74) are provided inside the sampling cylinder (71). An inlet (76) communicating with the inside of the sampling slots (74) is fixedly connected to the sampling cylinder (71). An adjustment screw (72) is rotatably connected to the top of the sampling cylinder (71). The adjustment screw (72) is connected to the bracket (2) by a thread. A water pressure drive mechanism (8) is fixedly connected to the outer sleeve (1); Rotate the adjustment mechanism (9) connected inside the outer sleeve (1), the adjustment mechanism (9) is used to open different water inlets (76); A sealing rotatable scraping mechanism (10) is connected to the outer sleeve (1).

2. The sampling device for water conservancy engineering testing according to claim 1, characterized in that: The outer sleeve (1) is fixedly connected to a limiting rod (5), and the outer surface of the sampling cylinder (71) is provided with a limiting groove (73). The limiting groove (73) and the limiting rod (5) are connected in a sealed sliding connection.

3. The sampling device for water conservancy engineering testing according to claim 1, characterized in that: The outer sleeve (1) has a groove (6) and a filter screen (4) is fixedly connected to the part of the outer sleeve (1) with the groove (6). The water inlet (76) is located in the groove (6) and is set directly opposite the filter screen (4). The length of the sampling tube (71) is longer than the length of the filter screen (4).

4. A sampling device for testing water conservancy projects according to claim 1, characterized in that: The adjusting mechanism (9) includes a first spline shaft (91) rotatably connected inside the outer sleeve (1), a gear (92) fixedly connected to the outer surface of the first spline shaft (91), a first spline sleeve (93) slidably connected to the outer surface of the first spline shaft (91), an adjusting plate (94) threadedly connected to the first spline sleeve (93), and a through hole (95) provided on the adjusting plate (94).

5. A sampling device for water conservancy engineering testing according to claim 4, characterized in that: The sampling cylinder (71) has a through groove (77), the adjusting plate (94) is slidably connected to the through groove (77), and the first spline sleeve (93) is rotatably connected to the bottom of the sampling cylinder (71).

6. A sampling device for testing water conservancy projects according to claim 4, characterized in that: The water pressure drive mechanism (8) includes a fixed pipe (81) fixedly connected to the outer sleeve (1), a screen (82) fixedly connected to the liquid inlet end of the fixed pipe (81), a one-way valve (83) installed inside the fixed pipe (81), a retaining ring (84) fixedly connected inside the fixed pipe (81), the one-way valve (83) being located between the retaining ring (84) and the screen (82), a drive plate (85) being sealed and slidably connected inside the fixed pipe (81), a toothed rod (86) fixedly connected to one side of the drive plate (85), a positioning rod (87) fixedly connected to the inner bottom of the outer sleeve (1), the positioning rod (87) being slidably connected to the toothed rod (86), a baffle (89) fixedly connected inside the fixed pipe (81), a retaining spring (810) fixedly connected to the baffle (89), and one end of the retaining spring (810) being fixedly connected to the drive plate (85).

7. A sampling device for testing water conservancy projects according to claim 6, characterized in that: The bottom of the fixed pipe (81) is fixedly connected to a drain pipe (88), which is located between the one-way valve (83) and the retaining ring (84). The toothed rod (86) meshes with the gear (92).

8. A sampling device for water conservancy engineering testing according to claim 6, characterized in that: The scraping mechanism (10) includes a second spline sleeve (101) rotatably connected inside the sampling cylinder (71), an impeller (102) fixedly connected to the outer surface of the second spline sleeve (101), a second spline shaft (103) slidably connected to the inner surface of the second spline sleeve (101), a rotating shaft (104) fixedly connected to the bottom of the second spline shaft (103), a conical block (105) fixedly connected to the bottom of the rotating shaft (104), and a scraping frame (106) fixedly connected to the outer surface of the rotating shaft (104).

9. A sampling device for testing water conservancy projects according to claim 8, characterized in that: The rotating shaft (104) is rotatably connected to the outer sleeve (1). Multiple impellers (102) are provided and are located in multiple sampling slots (74). The impellers (102) are positioned directly opposite the water inlet (76).

10. A sampling device for testing water conservancy projects according to claim 8, characterized in that: The scraper (106) is attached to the outer surface of the filter screen (4), and the scraper (106) is attached to the screen (82).

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