A detection sampling device for hydraulic engineering

Abstract

The present application relates to the technical field of water conservancy sampling, in particular to a detection sampling device for water conservancy. The present application comprises: a sampling cylinder, a water inlet is formed on the side wall of the sampling cylinder; a fine filter screen is installed on the water inlet, a coarse filter screen is installed on the outside of the fine filter screen; a rotating shaft is coaxially arranged between the fine filter screen and the coarse filter screen, a cleaning brush for cleaning the fine filter screen and the coarse filter screen, and a poking cutting piece for poking away large impurities or cutting waterweeds are installed on the rotating shaft; a power source for driving the rotating shaft to rotate is arranged on the top of the sampling cylinder. The present application can perform secondary filtration on water samples through the arrangement of the coarse filter screen and the fine filter screen, can clean the coarse filter screen and the fine filter screen respectively through the arrangement of the cleaning brush, and can poke away large impurities or cut waterweeds through the poking cutting piece while cleaning.

Description

Technical Field

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

[0002] Water conservancy engineering sampling devices are used to collect samples of materials or media related to water conservancy projects. During the construction and operation of water conservancy projects (such as reservoirs) along rivers and lakes, it is necessary to monitor water quality changes at different depths to understand the water quality status at these depths. These devices are used to collect deep water samples and analyze indicators such as dissolved oxygen, pH, nutrients, heavy metal content, and organic pollution. This helps monitor vertical changes in the water body, thereby understanding the overall pollution status and ecological environment of the water body.

[0003] The invention with application number CN202411049196.3 relates to the field of water conservancy engineering sampling technology, specifically a sampling device and method for water conservancy engineering. It includes a water collection cylinder with a water inlet trough on its front side and a shielding ring movably disposed on the front side of the water inlet trough. A pressure plate is movably disposed inside the water collection cylinder, a first fixing block is movably disposed on the upper side of the water collection cylinder, and fan blades are arrayed on the first fixing block. A counterweight is movably disposed on the lower side of the water collection cylinder, an exhaust mechanism is disposed inside the water collection cylinder, and a driving mechanism is disposed on the upper side of the water collection cylinder. This invention utilizes a shielding ring that can be opened and closed underwater, allowing the device to accurately absorb water from a designated area. Upon reaching the designated area, a negative pressure is created inside the water collection cylinder. When the shielding ring opens, the negative pressure rapidly draws in water. Furthermore, as the shielding ring rises, a filter screen covers the water inlet trough, preventing stones or other debris from obstructing it.

[0004] However, this patent only relies on the filter screen passively blocking stones and other debris after the shielding ring rises, lacking an active cleaning mechanism, and thus has limited cleaning effect.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the Invention

[0006] The purpose of this invention is to provide a testing and sampling device for water conservancy projects that can effectively solve the above-mentioned technical problems.

[0007] To achieve the objectives of this invention, the following technical solution is adopted:

[0008] A sampling device for water conservancy projects includes: a sampling tube, wherein a water inlet is provided on the side wall of the sampling tube;

[0009] A fine filter screen is installed on the water inlet, and a coarse filter screen is installed on the outside of the fine filter screen;

[0010] A rotating shaft is coaxially arranged between the fine filter screen and the coarse filter screen. A cleaning brush for cleaning the fine filter screen and the coarse filter screen, and a cutting blade for removing large impurities or cutting aquatic plants are installed on the rotating shaft.

[0011] The top of the sampling cylinder is equipped with a power source that drives the rotating shaft to rotate.

[0012] Furthermore, the output end of the power source is connected to a stirring blade; the output end of the power source is also connected to a transmission rod, the transmission rod is threadedly connected to a piston, and the piston is slidably installed inside the sampling cylinder.

[0013] Furthermore, a rack is slidably mounted on one side of the sampling cylinder; the rack is meshed with a gear; the gear is coaxially connected to a drive shaft; the drive shaft is connected to a first driven wheel; the first driven wheel is driven by a transmission component; the transmission component is driven by a second driven wheel, and the second driven wheel is coaxially connected to the rotating shaft.

[0014] Furthermore, a storage box is provided at the top of the sampling tube, and a discharge port is provided at the bottom of the storage box. A baffle is hinged to the discharge port, and a reset torsion spring is coaxially connected to the baffle. The bottom of the baffle is connected to the piston through an elastic connecting rope.

[0015] Furthermore, a pressure sensor is installed at the bottom of the inner side of the sampling tube; a solenoid valve is installed at the water inlet of the sampling tube; the pressure sensor and the solenoid valve are electrically connected to a controller; and the controller is electrically connected to the power source.

[0016] Furthermore, a connecting buckle is provided at the top of the sampling tube.

[0017] Furthermore, a counterweight is detachably connected to the bottom of the sampling cylinder.

[0018] Furthermore, a protective shell is provided on the outside of the power source; protective shells are provided on the outside of the first driven wheel, the transmission component, and the second driven wheel.

[0019] Furthermore, a limiting rod is installed on the inner wall of the sampling cylinder, and the limiting rod is slidably connected to the piston.

[0020] Furthermore, a water outlet is provided on the side wall of the sampling tube.

[0021] Compared with the prior art, the present invention has the following beneficial effects: the present invention can perform secondary filtration of water samples by setting coarse and fine filter screens, and can clean the coarse and fine filter screens separately by setting cleaning brush. At the same time, large impurities or aquatic plants can be removed by moving the cutting blade. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0023] Figure 1 This is a schematic diagram of the structure of a sampling and detection device for water conservancy projects according to the present invention;

[0024] Figure 2 This is a schematic diagram of a sampling and detection device for water conservancy projects according to the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of a detection and sampling device for water conservancy projects according to the present invention;

[0026] Figure 4 This is an internal schematic diagram of a detection and sampling device for water conservancy projects according to the present invention;

[0027] Figure 5 This is a schematic diagram of the gear transmission part of a sampling and detection device for water conservancy projects according to the present invention;

[0028] Figure 6 This is a schematic diagram of a sampling and detection device for water conservancy projects according to the present invention.

[0029] In the diagram: 1. Sampling cylinder; 2. Cover; 3. Connecting buckle; 4. Protective shell; 5. Power source; 6. Drain outlet; 7. Pressure relief hole; 8. Coarse filter screen; 9. Actuating cutting blade; 10. Stirring blade; 11. Piston; 12. Limiting rod; 13. Rack; 14. Gear; 15. First driven wheel; 16. Transmission component; 17. Second driven wheel; 18. Cleaning component; 19. Fine filter screen; 20. Drive shaft; 21. Protective shell; 22. Counterweight; 23. Storage box; 24. Controller; 25. Pressure sensor; 26. Solenoid valve; 27. Communicator; 28. Mobile terminal. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0031] In the description of this invention, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. When a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0032] like Figures 1 to 6 As shown, the present invention relates to a sampling device for water conservancy projects, comprising: a sampling cylinder 1, the interior of which is hollow to form a storage space for holding water samples taken from rivers or lakes.

[0033] A water inlet is provided on the side wall of the sampling cylinder 1 near the top, and a solenoid valve 26 is installed on the water inlet to control the opening and closing of the water inlet; a drain outlet 6 is also provided on the side wall of the sampling cylinder 1 to discharge the water sample from the sampling cylinder 1; a pressure relief hole 7 is provided on the side wall of the sampling cylinder 1 near the bottom to relieve pressure and avoid interfering with the movement of the piston 11.

[0034] The top of the sampling cylinder 1 is provided with a cover 2, which is detachably connected to the sampling cylinder 1 so that the cover 2 can be opened to inspect the internal structure of the sampling cylinder 1.

[0035] Two connecting buckles 3 are symmetrically installed on both sides of the top of the cover 2. The connecting buckles 3 are used to connect the lifting rope or connecting rod so that the sampling tube 1 can be placed into the water manually or by a lifting device, or taken out of the water. A storage box 23 is also provided near the edge of the top of the cover 2. The storage box 23 is used to store flocculant. When sampling turbid water samples such as polluted river water or industrial wastewater, the staff can put flocculant into the storage box 23. The storage box 23 includes a box body. The top of the box body is provided with an inlet for adding flocculant. The bottom of the box body is provided with an outlet. A baffle is hinged to the outlet. A return torsion spring is coaxially connected to the baffle. When the baffle is opened, flocculant is added. The larger the opening range, the faster the addition speed. The outlet of the storage box 23 is connected to the inside of the sampling tube 1. The baffle is connected to the piston 11 through an elastic connecting rope. The elastic connecting rope is set against the side wall of the sampling tube 1 so that when the piston 11 slides, it can drive the baffle to open.

[0036] A telescopic block is provided at the bottom of the inner side of the sampling cylinder 1. The telescopic block includes a shell, a slider that is slidably installed inside the shell, and a spring installed at the bottom of the slider and connected to the shell. A pressure sensor 25 is also provided between the slider and the shell. A connecting block is provided below the sampling cylinder 1. The connecting block is cylindrical and has a connecting structure at its bottom for connecting a counterweight 22 to adjust the sinking speed so that the sampling cylinder 1 can sink into the water quickly. The connecting structure is a common buckle, hook, etc.

[0037] A power source 5 is also installed on the top of the cover 2. A protective shell 4 is provided on the outside of the power source 5 to prevent water from entering the power source 5. A power supply can also be provided inside the protective shell 4 to supply power to the power source 5. A piston 11 is slidably installed inside the sampling cylinder 1. The piston 11 is driven to rise and fall by the power source 5. In this embodiment, the power source 5 can be a motor, a linear motor or a telescopic cylinder.

[0038] As an optional solution, the power source 5 can be an electric motor. The output end of the motor is connected to a transmission rod, which is threadedly connected to the middle of the piston 11. The motor rotates through the transmission rod, driving the piston 11 to rise and fall. A limit rod 12 is also fixedly installed on the inner wall of the sampling cylinder 1. The piston 11 is slidably connected to the limit rod 12, which limits the piston 11 to ensure that the piston 11 can slide up and down when the transmission rod rotates, but will not rotate with the transmission rod. The output end of the motor is also connected to a stirring blade 10, which is used to stir the water sample entering the sampling cylinder 1 to promote solid-liquid separation. When the motor starts, it drives the stirring blade 10 to stir to improve the uniformity of the sample, and drives the piston 11 to move downward along the limit rod 12 to create a negative pressure inside the sampling cylinder 1, so that the sampling cylinder 1 can quickly extract the water sample. The transmission rod can be a threaded rod or a ball screw.

[0039] A rack 13 is slidably mounted on one side inside the sampling cylinder 1; the bottom of the rack 13 is connected to the top of the piston 11, so that the piston 11 can drive the rack 13 to move up and down; the rack 13 is meshed with a gear 14, which is used to drive the gear 14 to rotate; the gear 14 is coaxially connected to a drive shaft 20, which is rotatably mounted on the side wall of the sampling cylinder 1, and can also be rotatably mounted on the coarse filter screen 8, so that the rotation of the gear 14 can drive the drive shaft 20 to rotate synchronously; the drive shaft 20 extends through the side wall of the sampling cylinder 1 to the outside of the sampling cylinder 1, and the end of the drive shaft 20 on the outside of the sampling cylinder 1 is connected to a first driven wheel 15, so that the rotation of the drive shaft 20 can drive the first driven wheel 15 to rotate; the first driven wheel 15 is driven by a transmission component 16, and the transmission component 16 is driven by a second driven wheel 17, so that the rotation of the first driven wheel 15 can drive the first driven wheel 17 to rotate. The first driven wheel 15 and the second driven wheel 17 are coaxially connected to a rotating shaft, and the rotation of the second driven wheel 17 can drive the rotating shaft to rotate. A cleaning component 18 is installed at the end of the rotating shaft near the sampling cylinder 1, and a cutting disc 9 is installed at the end of the rotating shaft away from the sampling cylinder 1. The rotation of the rotating shaft can drive the cleaning component 18 and the cutting disc 9 to rotate respectively. Bristles are provided on the upper and lower sides of the cleaning component 18 and the side near the fine filter screen 19, so that the fine filter screen 19 and the coarse filter screen 8 can be cleaned respectively. The first driven wheel 15 and the second driven wheel 17 can be selected as gears 14, synchronous belts or pulleys, and the corresponding transmission component 16 can be selected as chains, synchronous belts or belts. A protective shell 21 is also installed on the outer wall of the sampling cylinder 1 to protect the first driven wheel 15 and the second driven wheel 17 set inside it and prevent large objects such as wood blocks and stones in the water from impacting them.

[0040] A coarse filter screen 8 is installed on the outer wall of the sampling tube 1. The coarse filter screen 8 is located outside the water inlet and is used for the initial filtration of the water sample. A fine filter screen 19 is installed on the water inlet of the sampling tube 1 and is used for the secondary filtration of the incoming water sample. The cleaning component 18 is located inside the coarse filter screen 8 and is used to clean the coarse filter screen 8 and the fine filter screen 19 at the same time. The agitator cutting blade 9 is located outside the coarse filter screen 8 and is used to cut aquatic plants near the coarse filter screen 8 or to remove or clear other impurities to avoid affecting the water intake.

[0041] When the device is lowered into the water at the predetermined depth, the operator controls the power source 5 to start via the mobile terminal 28, and simultaneously opens the solenoid valve 26. When the power source 5 starts, it drives the piston 11 to slide downward, quickly extracting water samples and causing the stirring blade 10 to rotate. During the downward sliding of the piston 11, it drives the rack 13 to slide downward, thereby causing the gear 14 to rotate, which in turn drives the first driven wheel 15 and the transmission component 16 to rotate in sequence. During the rotation of the transmission component 16, it drives the cutting blade 9 to rotate to cut weeds at the water inlet, and simultaneously drives the cleaning component 18 to rotate, thereby cleaning the fine filter screen 19 and the coarse filter screen 8 respectively, which can remove... The attachment of fine particles such as silt and algae prevents filter clogging, which could affect the sampling volume and water quality representativeness, and reduces solid impurity pollution. When sampling polluted water areas, the staff first adds flocculant to the storage box 23. As the piston 11 slides downward, it causes the baffle of the storage box 23 to open. The opening range of the baffle and the movement speed of the piston 11 must be matched. The greater the downward stroke of the piston 11, the greater the opening range of the baffle. At this time, there is more water sample in the sampling tube 1, and the flocculant is fed in faster, which facilitates quantitative dosing and allows the flocculant to be gradually added into the sampling tube 1. The stirring blade 10 can mix the flocculant with the water sample. In this embodiment, the piston 11 and the stirring blade 10 are linked by a motor to realize the pumping and stirring work simultaneously, improving sampling efficiency. The double filter can improve the purity of the water sample and reduce the interference of large particles.

[0042] The sampling cylinder 1 is also equipped with a controller 24, which is electrically connected to the pressure sensor 25 and the solenoid valve 26. The controller 24 is also electrically connected to a communicator 27, which is responsible for receiving and processing signals from the pressure sensor 25 and controlling the operation of the solenoid valve 26 and the motor according to the preset logic. The mobile terminal 28 is connected to the communicator 27 via wireless communication. The staff can send control commands on the mobile terminal 28 to control the start and stop of the power source 5. The mobile terminal 28 can be a mobile terminal device, remote control, etc.

[0043] During startup, a command is sent via mobile terminal 28, and controller 24 simultaneously starts power source 5 and opens solenoid valve 26. After double filtration through coarse filter screen 8 and fine filter screen 19, the water sample enters sampling cylinder 1. When pressure sensor 25 detects the bottoming signal of piston 11, controller 24 closes solenoid valve 26 to stop water intake, ensuring that the water volume sampled each time reaches the preset threshold. When the measured real-time pressure reaches the set threshold, controller 24 closes solenoid valve 26 to prevent backflow of water sample or entry of external impurities. At the same time, when piston 11 moves to the lowest position, rack 13 separates from gear 14, causing transmission rod to idle and no longer drive piston 11 to move axially along transmission rod. Motor continues to drive stirring blade 10 to rotate, continuously mixing. After mixing for a predetermined time (e.g., 3-5 minutes), the flocculant and water sample are fully mixed, promoting sedimentation or uniform dispersion of suspended solids. After shutdown, staff can remove the water sample.

[0044] As a further extension of this application, when sampling deep water areas in a water body, due to the high water pressure, after the previous water sample is taken out, it is not necessary to move the piston 11 upward to reset. The sampling tube 1 can be directly put into the water body for sampling, saving reset energy and time. When sampling shallow water areas in a water body, due to the low water pressure, the piston 11 needs to be reset to the upper part before sampling to form an initial negative pressure, which can quickly draw water and shorten the sampling time, thereby increasing the sampling speed. Rapid sampling can reduce sampling errors caused by water flow disturbance.

[0045] As another alternative, the power source 5 is a linear motor or a telescopic cylinder. The output end of the power source 5 is connected to a female guide rod, which has a spiral groove inside. The female guide rod is slidably connected to a male guide rod. When the output end of the power source 5 extends, it drives the female guide rod to move downward, thereby driving the male guide rod to rotate, which in turn drives the stirring blade 10 to rotate; and drives the piston 11 to slide downward. In this solution, there is no need to use a limiting rod 12 to limit the piston 11. The female guide rod and the male guide rod are preferably ball screws.

[0046] Alternatively, the rack 13 can be moved up and down in the following way: Specifically, a driving bevel gear 14 can be coaxially mounted on the output shaft of the motor. The driving bevel gear 14 is connected to a driven bevel gear 14. A spur gear 14 is mounted on the drive shaft 20 of the driven bevel gear 14. The spur gear 14 meshes with the rack 13. The bevel gear 14 drives the spur gear 14 to rotate, thereby driving the rack 13 to move up and down. When the rack 13 moves to the lowest position in this way, it separates from the spur gear 14. A rack 13 reset structure needs to be set, such as installing a reset spring at the bottom of the rack 13, so that when the spur gear 14 reverses, it can drive the rack 13 to mesh with the spur gear 14, thereby causing the rack 13 to move upward.

[0047] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0048] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A sampling and detection device for water conservancy projects, characterized in that, Includes: a sampling tube, wherein a water inlet is provided on the side wall of the sampling tube; A fine filter screen is installed on the water inlet, and a coarse filter screen is installed on the outside of the fine filter screen; A rotating shaft is coaxially arranged between the fine filter screen and the coarse filter screen. A cleaning brush for cleaning the fine filter screen and the coarse filter screen, and a cutting blade for removing large impurities or cutting aquatic plants are installed on the rotating shaft. The top of the sampling tube is equipped with a power source that drives the rotating shaft to rotate; The output end of the power source is connected to a stirring blade; the output end of the power source is also connected to a transmission rod, the transmission rod is threadedly connected to a piston, and the piston is slidably installed inside the sampling cylinder; A rack is slidably mounted on one side of the sampling cylinder; the rack is meshed with a gear; the gear is coaxially connected to a drive shaft; the drive shaft is connected to a first driven wheel; the first driven wheel is driven by a transmission component; the transmission component is driven by a second driven wheel, and the second driven wheel is coaxially connected to the rotating shaft. The top of the sampling tube is also provided with a storage box, the bottom of the storage box is provided with a discharge port, a baffle is hinged on the discharge port, a return torsion spring is coaxially connected to the baffle, and the bottom of the baffle is connected to the piston through an elastic connecting rope. A pressure sensor is installed at the bottom of the inner side of the sampling tube; a solenoid valve is installed at the water inlet of the sampling tube; the pressure sensor and the solenoid valve are electrically connected to a controller; the controller is electrically connected to the power source.

2. The sampling and detection device for water conservancy projects as described in claim 1, characterized in that, The top of the sampling tube is equipped with a connecting buckle.

3. The sampling and testing device for water conservancy projects as described in claim 2, characterized in that, The bottom of the sampling tube is detachably connected to a counterweight.

4. The sampling and testing device for water conservancy projects as described in claim 1, characterized in that, The power source is provided with a protective shell on its outer side; the first driven wheel, the transmission component, and the second driven wheel are provided with protective shells on their outer sides.

5. The sampling and testing device for water conservancy projects as described in claim 1, characterized in that, A limiting rod is also installed on the inner wall of the sampling cylinder, and the limiting rod is slidably connected to the piston.

6. The sampling and detection device for water conservancy projects as described in claim 1, characterized in that, The sampling tube has a water outlet on its side wall.

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