Water sample filtering device for water quality monitoring

Abstract

The invention relates to the technical field of water quality monitoring, in particular to a water quality monitoring water sample filtering device which comprises a barrel body, a treatment device is arranged on the surface of the barrel body, a filtering assembly is arranged on one side of the barrel body, the treatment device comprises a piston plate, and the piston plate slides relative to the inner wall of the barrel body. One side of the barrel body is fixedly connected with a first one-way valve, one side of the first one-way valve is fixedly connected with a water inlet pipe, the lower surface of the barrel body is fixedly connected with a rotating joint, the lower surface of the rotating joint is rotatably connected with a second one-way valve, and one end of the second one-way valve is fixedly connected with a water guide pipe; the filtering assembly comprises a positioning rod, the positioning rod is fixedly connected with one side of the barrel body, and one end of the positioning rod is fixedly connected with a containing frame. According to the scheme, a sample is effectively and rapidly filtered, the sample can be extracted for multiple times, the probability that the sample is polluted is reduced, the accuracy of detection data is ensured, and normal use of equipment is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality monitoring, and particularly to a water quality monitoring water sample filtering device. Background Art

[0002] Water quality monitoring is a process of monitoring and measuring the types, concentrations, and changing trends of pollutants in water bodies to evaluate the water quality status. Its purpose is to ensure the safety of drinking water, prevent water - borne infectious diseases caused by water source pollution, and at the same time provide a basis for protecting the ecological environment to ensure a good living environment for aquatic organisms. By monitoring various indicators, water quality problems can be detected in a timely manner and corresponding measures can be taken, such as treating pollution, adjusting the industrial structure, etc., to achieve the sustainable utilization of water resources and provide an important guarantee for the stability of human life and the ecosystem. When conducting water quality monitoring, it is often necessary to preliminarily filter water samples.

[0003] Existing technologies such as the invention with the publication number CN103837391A disclose a water quality monitoring water sample pretreatment device, including: a back - flushing collecting pool, a water sample sedimentation tank, a water sample inlet pipe communicating with the bottom of the back - flushing collecting pool, an air pipe connected to the upper part of the water sample sedimentation tank, a sludge discharge pipe communicating with the bottom of the water sample sedimentation tank, an overflow pipe and an overflow air pipe communicating with the sludge discharge pipe, and a sampling pipe communicating with the water sample sedimentation tank. The present invention has the advantages of reasonable design, small volume, simple structure, low cost, no need for a dedicated cleaning water source, no need for various valves, and can automatically complete all processes of water sample filtration, device flushing, filter screen back - flushing, water sample sedimentation, sampling analysis, and sludge discharge.

[0004] Currently, most water quality monitoring water sample treatment devices can often only generate a single set of samples, and the samples are unique. When the water sample is contaminated, it is easy to have inaccurate detection data, which is not conducive to the normal use of the device. Therefore, improvements are needed. Summary of the Invention

[0005] The purpose of the present invention is to solve the drawbacks in the prior art that most water quality monitoring water sample treatment devices can often only generate a single set of samples, and the samples are unique. When the water sample is contaminated, it is easy to have inaccurate detection data, which is not conducive to the normal use of the device, and to propose a water quality monitoring water sample filtering device.

[0006] To achieve the above object, the present invention adopts the following technical solution: A water quality monitoring water sample filtering device, including a barrel body, a processing device is arranged on the surface of the barrel body, a filtering component is arranged on one side of the barrel body, the processing device includes a piston plate which slides with the inner wall of the barrel body, a first one-way valve is fixedly connected to one side of the barrel body, a water inlet pipe is fixedly connected to one side of the first one-way valve, a rotating joint is fixedly connected to the lower surface of the barrel body, a second one-way valve is rotatably connected to the lower surface of the rotating joint, a water guide pipe is fixedly connected to one end of the second one-way valve, the filtering component includes a positioning rod fixedly connected to one side of the barrel body, a placing rack is fixedly connected to one end of the positioning rod, a cup body is placed in the placing rack, a filter screen is placed inside the placing rack, and a control device is arranged on the surface of the barrel body. This solution can effectively filter the sample quickly and can extract the sample multiple times, reducing the probability of sample contamination, ensuring the accuracy of the detection data, and facilitating the normal use of the device.

[0007] Preferably, the number of the positioning rods, the placing racks and the cup bodies is three each, and the three positioning rods, placing racks and cup bodies are arranged in a circumferential array. When performing detection, insert the water inlet pipe into the container filled with water sample, and then control the telescopic rod to drive the piston block to move upward. Under the action of atmospheric pressure, water enters the barrel body through the water inlet pipe and the first one-way valve.

[0008] Preferably, a connecting frame is fixedly connected between the three placing racks to ensure the stability of the placing racks.

[0009] Preferably, a support frame is fixedly connected to the upper surface of the barrel body, a fixed sleeve is fixedly connected to one end of the support frame, a telescopic rod is installed inside the fixed sleeve, and the driving end of the telescopic rod is fixedly connected to the upper surface of the piston plate, facilitating the normal use of the device.

[0010] Preferably, a connecting sleeve is slidably connected to the water guide pipe, a support rod is fixedly connected to the inner wall of the connecting sleeve, a convex block is fixedly connected to the upper surface of the support rod, the convex block is a cylinder, and the diameter of the convex block is smaller than the inner diameter of the water guide pipe.

[0011] Preferably, a base is fixedly connected to the surface of the water guide pipe, a tension spring is fixedly connected to the upper surface of the connecting sleeve, the tension spring is sleeved on the water guide pipe, and one end of the tension spring is fixedly connected to the base.

[0012] Preferably, an installation rod is fixedly connected to the inner wall of the placement rack. A shaft rod is rotatably connected to the inner wall of the installation rod. A stop block is fixedly connected to the lower surface of the shaft rod. Three guide vanes arranged in a circumferential array are fixedly connected to the surface of the shaft rod. Three water outlet heads arranged in a circumferential array are fixedly connected to the lower surface of the stop block. Water guide holes communicating with the water outlet heads are formed in the stop block. After the water sample is extracted, the control telescopic rod is controlled to push the piston block downward. The piston block immediately pushes the water sample out from the rotating joint, the second one-way valve and the water guide pipe. When the water sample flows out from one end of the water guide pipe, it pushes the convex block. The convex block drives the connecting sleeve to be inserted into the groove above the placement rack through the support rod. The tension spring is deformed under force. Then the water sample enters the placement rack. The water sample pushes the guide vanes. The guide vanes immediately drive the shaft rod and the water outlet heads to rotate. The water outlet heads immediately spray the water sample into the placement rack. Affected by the atmospheric pressure, the water is squeezed and quickly passes through the filter screen and falls into the cup body. After a certain amount of water is sampled, the telescopic rod is closed. Then the water guide pipe stops supplying water. The tension spring pulls the connecting sleeve, the support rod and the convex block upward. The convex block immediately inserts into the water guide pipe to prevent the water sample from leaking. Then the connecting sleeve disengages from the groove on the placement rack. Then the drive motor is turned on. The drive motor drives the rotating ring, the connecting rod and the collar to rotate through the drive wheel. Then the collar drives the water guide pipe to rotate above another placement rack. Then the above operations are repeated to filter three groups of samples. Then the samples can be detected and analyzed one by one.

[0013] Preferably, a positioning block is fixedly connected to the inner wall of the placement rack. The upper surface of the filter screen abuts against the lower surface of the positioning block. A bolt is inserted into the filter screen. One end of the bolt is threadedly inserted into the positioning block. A guiding ring is fixedly connected to the lower surface of the filter screen. When cleaning the equipment, only need to turn the bolt to screw it off, remove the filter screen for cleaning. Then insert the water inlet pipe into a clean water source. Repeat the above operations. The rotating water outlet head evenly impacts the inner wall of the placement rack with water. After the operation is completed, install the filter screen.

[0014] Preferably, a handle is fixedly connected to the surface of the cup body. The edge of the handle is rounded. Pulling the handle can take out the cup body, which is convenient for quickly extracting the sample.

[0015] Preferably, the control device includes an installation sleeve fixedly connected to the surface of the barrel body. A drive motor is installed in the installation sleeve. A drive wheel is fixedly connected to the drive end of the drive motor. A rotating ring is rotatably connected to the lower surface of the barrel body. The drive wheel is in transmission connection with the rotating ring. A connecting rod is fixedly connected to the lower surface of the rotating ring. The end of the connecting rod away from the rotating ring is fixedly connected to a collar. The collar is sleeved on the water inlet pipe.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are as follows: In the present invention, during detection, the water inlet pipe is inserted into a container filled with a water sample. Subsequently, the telescopic rod is controlled to drive the piston block to move upward. Under the action of atmospheric pressure, water enters the barrel through the water inlet pipe and the first one-way valve. After the water sample is extracted, the telescopic rod is controlled to push the piston block downward. The piston block immediately pushes the water sample out through the rotary joint, the second one-way valve, and the water guide pipe. When the water sample flows out from one end of the water guide pipe, it pushes the convex block. The convex block drives the connecting sleeve to insert into the groove above the placement rack through the support rod. The tension spring deforms under force. Subsequently, the water sample enters the placement rack. The water sample pushes the guide vane, and the guide vane immediately drives the shaft rod and the water outlet head to rotate. The water outlet head immediately sprays the water sample into the placement rack. Affected by atmospheric pressure, the water is squeezed and quickly passes through the filter screen and falls into the cup body. After a certain amount of water is sampled, the telescopic rod is closed. Subsequently, the water supply of the water guide pipe stops. The tension spring pulls the connecting sleeve, the support rod, and the convex block upward. The convex block immediately inserts into the water guide pipe to prevent water sample leakage. Subsequently, the connecting sleeve disengages from the groove on the placement rack. Subsequently, the driving motor is turned on. The driving motor drives the rotating ring, the connecting rod, and the collar to rotate through the driving wheel. Subsequently, the collar drives the water guide pipe to rotate above another placement rack. Subsequently, the above operations are repeated to filter three groups of samples. Subsequently, the samples can be individually detected and analyzed. When cleaning the device, only need to turn the bolt and screw it off, and remove the filter screen for cleaning. Subsequently, insert the water inlet pipe into a clean water source and repeat the above operations. The rotating water outlet head evenly impacts the inner wall of the placement rack with water. After the operation is completed, install the filter screen. This solution effectively performs rapid filtration operations on samples, can perform multiple extractions of samples, reduces the probability of sample contamination, ensures the accuracy of detection data, and facilitates the normal use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 1 is a schematic three-dimensional structure diagram of a water quality monitoring water sample filtering device proposed by the present invention; Figure 2 FIG. 2 is a schematic bottom view structure diagram of a water quality monitoring water sample filtering device proposed by the present invention; Figure 3 FIG. 3 is a schematic structure diagram of part A in a water quality monitoring water sample filtering device proposed by the present invention Figure 2 ; Figure 4 FIG. 4 is an exploded structure diagram of a water quality monitoring water sample filtering device proposed by the present invention; Figure 5 FIG. 5 is a schematic partial structure diagram of a water quality monitoring water sample filtering device proposed by the present invention; Figure 6 FIG. 6 is a schematic structure diagram of part B in a water quality monitoring water sample filtering device proposed by the present invention Figure 5 ; Figure 7 FIG. 7 is a schematic partial structure diagram of a water quality monitoring water sample filtering device proposed by the present invention Figure 5 ; Figure 8 The present invention provides a structural schematic diagram of the C part in a water quality monitoring water sample filtering device Figure 7 ; Figure 9 The present invention provides an explosion structural schematic diagram of a water guiding pipe in a water quality monitoring water sample filtering device Figure 10 The present invention provides a sectional structural schematic diagram of a placement rack in a water quality monitoring water sample filtering device Figure 11 The present invention provides a Figure 10 partial structural schematic diagram in a water quality monitoring water sample filtering device

[0018] Legend: 1. Barrel body; 2. Processing device; 21. Fixed sleeve; 22. Support frame; 23. Piston plate; 24. Telescopic rod; 25. First one-way valve; 26. Water inlet pipe; 27. Support rod; 28. Rotating joint; 29. Second one-way valve; 210. Water guiding pipe; 211. Base; 212. Tensile spring; 213. Connecting sleeve; 214. Convex block; 3. Filtering component; 31. Placement rack; 32. Cup body; 33. Handle; 34. Positioning rod; 35. Connecting frame; 36. Filter screen; 37. Positioning block; 38. Bolt; 39. Installation rod; 310. Shaft rod; 311. Flow guiding blade; 312. Block; 313. Water outlet head; 314. Guide ring; 4. Control device; 41. Driving motor; 42. Installation sleeve; 43. Driving wheel; 44. Rotating ring; 45. Connecting rod; 46. Sleeve ring Detailed implementation manners

[0019] Please refer to Figures 1 - 11 , the present invention provides a technical solution: a water quality monitoring water sample filtering device, including a barrel body 1, a processing device 2 is arranged on the surface of the barrel body 1, a filtering component 3 is arranged on one side of the barrel body 1, the processing device 2 includes a piston plate 23, the piston plate 23 slides on the inner wall of the barrel body 1, a first one-way valve 25 is fixedly connected to one side of the barrel body 1, a water inlet pipe 26 is fixedly connected to one side of the first one-way valve 25, a rotating joint 28 is fixedly connected to the lower surface of the barrel body 1, a second one-way valve 29 is rotatably connected to the lower surface of the rotating joint 28, one end of the second one-way valve 29 is fixedly connected to a water guiding pipe 210, the filtering component 3 includes a positioning rod 34, the positioning rod 34 is fixedly connected to one side of the barrel body 1, a placement rack 31 is fixedly connected to one end of the positioning rod 34, a cup body 32 is placed in the placement rack 31, a filter screen 36 is placed inside the placement rack 31, a control device 4 is arranged on the surface of the barrel body 1. This solution can effectively perform rapid filtering operations on samples, and can perform multiple extractions of samples, reducing the probability of sample contamination, ensuring the accuracy of detection data, and facilitating the normal use of the device

[0020] Specifically, the number of positioning rods 34, placement racks 31, and cup bodies 32 is three each. The three positioning rods 34, placement racks 31, and cup bodies 32 are arranged in a circular array. When conducting detection, the water inlet pipe 26 is inserted into a container filled with water sample, and then the telescopic rod 24 is controlled to drive the piston block to move upward. Under the action of atmospheric pressure, water enters the barrel 1 through the water inlet pipe 26 and the first one-way valve 25.

[0021] Specifically, a connecting frame 35 is fixedly connected between the three placement racks 31 to ensure the stability of the placement racks 31.

[0022] In this embodiment: A support frame 22 is fixedly connected to the upper surface of the barrel 1. One end of the support frame 22 is fixedly connected to a fixed sleeve 21. The telescopic rod 24 is installed inside the fixed sleeve 21. The driving end of the telescopic rod 24 is fixedly connected to the upper surface of the piston plate 23, which facilitates the normal use of the device.

[0023] Specifically, a connecting sleeve 213 is slidably connected to the water guide pipe 210. The inner wall of the connecting sleeve 213 is fixedly connected to a support rod 27. The upper surface of the support rod 27 is fixedly connected to a convex block 214. The convex block 214 is a cylinder, and the diameter of the convex block 214 is smaller than the inner diameter of the water guide pipe 210.

[0024] Specifically, a base 211 is fixedly connected to the surface of the water guide pipe 210. The upper surface of the connecting sleeve 213 is fixedly connected to a tension spring 212. The tension spring 212 is sleeved on the water guide pipe 210, and one end of the tension spring 212 is fixedly connected to the base 211.

[0025] In this embodiment: An installation rod 39 is fixedly connected to the inner wall of the placement rack 31. A shaft rod 310 is rotatably connected to the inner wall of the installation rod 39. A stop block 312 is fixedly connected to the lower surface of the shaft rod 310. Three circumferentially arrayed diversion vanes 311 are fixedly connected to the surface of the shaft rod 310. Three circumferentially arrayed water outlets 313 are fixedly connected to the lower surface of the stop block 312. A water guide hole communicating with the water outlet 313 is formed in the stop block 312. After the water sample is extracted, the control telescopic rod 24 is pushed downward to drive the piston block, and the piston block immediately pushes the water sample out from the rotary joint 28, the second one-way valve 29, and the water guide pipe 210. When the water sample flows out from one end of the water guide pipe 210, it pushes the convex block 214. The convex block 214 drives the connecting sleeve 213 to be inserted into the groove above the placement rack 31 through the support rod 27. The tension spring 212 is deformed by force. Subsequently, the water sample enters the placement rack 31. The water sample pushes the diversion vane 311, and the diversion vane 311 immediately drives the shaft rod 310 and the water outlet 313 to rotate. The water outlet 313 immediately sprays the water sample into the placement rack 31. Affected by the atmospheric pressure, the water is squeezed and quickly passes through the filter screen 36 and falls into the cup body 32. After a certain amount of water is sampled, the telescopic rod 24 is closed. Subsequently, the water supply of the water guide pipe 210 stops. The tension spring 212 pulls the connecting sleeve 213, the support rod 27, and the convex block 214 upward. The convex block 214 is immediately inserted into the water guide pipe 210 to prevent the water sample from leaking. Subsequently, the connecting sleeve 213 disengages from the groove on the placement rack 31. Subsequently, the drive motor 41 is turned on. The drive motor 41 drives the rotating ring 44, the connecting rod 45, and the collar 46 to rotate through the drive wheel 43. Subsequently, the collar 46 drives the water guide pipe 210 to rotate above another placement rack 31. Subsequently, the above operations are repeated, and the filtration of three groups of samples can be performed. Subsequently, the samples can be detected and analyzed one by one.

[0026] Specifically, a positioning block 37 is fixedly connected to the inner wall of the placement rack 31. The upper surface of the filter screen 36 abuts against the lower surface of the positioning block 37. A bolt 38 is inserted into the filter screen 36. One end of the bolt 38 is threadedly inserted into the positioning block 37. A guide ring 314 is fixedly connected to the lower surface of the filter screen 36. When cleaning the equipment, only need to turn the bolt 38 to screw it off, remove the filter screen 36 for cleaning. Subsequently, insert the water inlet pipe 26 into a clean water source, repeat the above operations, and the rotating water outlet 313 evenly impacts the inner wall of the placement rack 31 with water. After the operation is completed, install the filter screen 36.

[0027] Specifically, a handle 33 is fixedly connected to the surface of the cup body 32. The edge of the handle 33 is rounded. Pulling the handle 33 can take out the cup body 32, which is convenient for quickly extracting the sample.

[0028] Specifically, the control device 4 includes an installation sleeve 42 which is fixedly connected to the surface of the barrel body 1. A driving motor 41 is installed in the installation sleeve 42. The driving end of the driving motor 41 is fixedly connected to a driving wheel 43. The lower surface of the barrel body 1 is rotatably connected to a rotating ring 44. The driving wheel 43 is in transmission connection with the rotating ring 44. The lower surface of the rotating ring 44 is fixedly connected to a connecting rod 45. One end of the connecting rod 45 far from the rotating ring 44 is fixedly connected to a collar 46. The collar 46 is sleeved on the water inlet pipe 26.

[0029] Working principle: When conducting detection, insert the water inlet pipe 26 into a container filled with water sample. Then control the telescopic rod 24 to drive the piston block to move upward. Under the action of atmospheric pressure, water enters the barrel body 1 through the water inlet pipe 26 and the first one-way valve 25. After extracting the water sample, control the telescopic rod 24 to push the piston block downward. The piston block immediately pushes the water sample out through the rotating joint 28, the second one-way valve 29 and the water guide pipe 210. When the water sample flows out from one end of the water guide pipe 210, it pushes the convex block 214. The convex block 214 drives the connecting sleeve 213 to insert into the groove above the placement rack 31 through the support rod 27. The tension spring 212 deforms under force. Then the water sample enters the placement rack 31. The water sample pushes the guide vane 311. The guide vane 311 immediately drives the shaft rod 310 and the water outlet head 313 to rotate. The water outlet head 313 immediately sprays the water sample into the placement rack 31. Affected by atmospheric pressure, the water is squeezed and quickly passes through the filter screen 36 and falls into the cup body 32. After sampling a certain amount of water, close the telescopic rod 24. Then the water guide pipe 210 stops supplying water. The tension spring 212 pulls the connecting sleeve 213, the support rod 27 and the convex block 214 upward. The convex block 214 immediately inserts into the water guide pipe 210 to prevent the water sample from leaking. Then the connecting sleeve 213 disengages from the groove on the placement rack 31. Then turn on the driving motor 41. The driving motor 41 drives the rotating ring 44, the connecting rod 45 and the collar 46 to rotate through the driving wheel 43. Then the collar 46 drives the water guide pipe 210 to rotate above another placement rack 31. Then repeat the above operations to filter three groups of samples. Then the samples can be detected and analyzed one by one. When cleaning the device, only need to turn the bolt 38 and screw it off, and remove the filter screen 36 for cleaning. Then insert the water inlet pipe 26 into a clean water source and repeat the above operations. The rotating water outlet head 313 evenly impacts the inner wall of the placement rack 31 with water. After the operation is completed, install the filter screen 36. This solution can effectively perform rapid filtration operations on the samples, and can extract the samples multiple times, reducing the probability of sample contamination, ensuring the accuracy of the detection data, and facilitating the normal use of the device.

Claims

1. A water quality monitoring water sample filtering device, comprising a barrel body (1), characterized in that: A processing device (2) is provided on the surface of the barrel body (1). A filtering component (3) is provided on one side of the barrel body (1). The processing device (2) includes a piston plate (23), and the piston plate (23) slides on the inner wall of the barrel body (1). A first one-way valve (25) is fixedly connected to one side of the barrel body (1). A water inlet pipe (26) is fixedly connected to one side of the first one-way valve (25). A rotating joint (28) is fixedly connected to the lower surface of the barrel body (1). A second one-way valve (29) is rotatably connected to the lower surface of the rotating joint (28). One end of the second one-way valve (29) is fixedly connected to a water guide pipe (210). The filtering component (3) includes a positioning rod (34), and the positioning rod (34) is fixedly connected to one side of the barrel body (1). A placement rack (31) is fixedly connected to one end of the positioning rod (34). A cup body (32) is placed in the placement rack (31). A filter screen (36) is placed inside the placement rack (31). A control device (4) is provided on the surface of the barrel body (1).

2. The water quality monitoring water sample filtering device according to claim 1, characterized in that: The number of the positioning rods (34), the placement racks (31) and the cup bodies (32) is three, and the three positioning rods (34), placement racks (31) and cup bodies (32) are arranged in a circumferential array.

3. The water quality monitoring water sample filtering device according to claim 1, wherein: A connecting frame (35) is fixedly connected between the three placement racks (31).

4. A water quality monitoring water sample filtering device according to claim 1, characterized in that: A support frame (22) is fixedly connected to the upper surface of the barrel body (1). A fixed sleeve (21) is fixedly connected to one end of the support frame (22). A telescopic rod (24) is installed inside the fixed sleeve (21), and the driving end of the telescopic rod (24) is fixedly connected to the upper surface of the piston plate (23).

5. A water quality monitoring water sample filtering device according to claim 1, characterized in that: A connecting sleeve (213) is slidably connected to the water guide pipe (210). A support rod (27) is fixedly connected to the inner wall of the connecting sleeve (213). A convex block (214) is fixedly connected to the upper surface of the support rod (27). The convex block (214) is a cylinder, and the diameter of the convex block (214) is smaller than the inner diameter of the water guide pipe (210).

6. The water quality monitoring water sample filtering device according to claim 5, characterized in that: A base (211) is fixedly connected to the surface of the water guide pipe (210). A tension spring (212) is fixedly connected to the upper surface of the connecting sleeve (213). The tension spring (212) is sleeved on the water guide pipe (210), and one end of the tension spring (212) is fixedly connected to the base (211).

7. The water quality monitoring water sample filtering device according to claim 1, characterized in that: An installation rod (39) is fixedly connected to the inner wall of the placement rack (31). A shaft rod (310) is rotatably connected to the inner wall of the installation rod (39). A stop block (312) is fixedly connected to the lower surface of the shaft rod (310). Three circumferentially arrayed guide vanes (311) are fixedly connected to the surface of the shaft rod (310). Three circumferentially arrayed water outlet heads (313) are fixedly connected to the lower surface of the stop block (312). Water guide holes communicating with the water outlet heads (313) are formed in the stop block (312).

8. A water quality monitoring water sample filtering device according to claim 1, characterized in that: The inner wall of the placement rack (31) is fixedly connected with a positioning block (37), the upper surface of the filter screen (36) abuts against the lower surface of the positioning block (37), a bolt (38) is inserted into the filter screen (36), one end of the bolt (38) is threadedly inserted into the positioning block (37), and the lower surface of the filter screen (36) is fixedly connected with a guiding ring (314).

9. A water quality monitoring water sample filtering device according to claim 1, characterized in that: The surface of the cup body (32) is fixedly connected with a handle (33), and the edge of the handle (33) is rounded.

10. A water quality monitoring water sample filtering device according to claim 1, characterized in that: The control device (4) includes an installation sleeve (42), the installation sleeve (42) is fixedly connected with the surface of the barrel body (1), a driving motor (41) is installed in the installation sleeve (42), the driving end of the driving motor (41) is fixedly connected with a driving wheel (43), the lower surface of the barrel body (1) is rotatably connected with a rotating ring (44), the driving wheel (43) is in transmission connection with the rotating ring (44), the lower surface of the rotating ring (44) is fixedly connected with a connecting rod (45), and one end of the connecting rod (45) far away from the rotating ring (44) is fixedly connected with a sleeve ring (46), and the sleeve ring (46) is sleeved on the water inlet pipe (26).

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