River water pollution detection device and use method thereof

Abstract

The invention relates to the technical field of water quality detection, and discloses a river water pollution detection device and a use method thereof.The detection device comprises a fixing frame located in water and fixedly provided with a water pumping pipe, the water inlet end of the water pumping pipe is fixedly provided with a filter screen, and the water outlet end of the water pumping pipe is communicated with a collecting assembly; the movable frame descends to the first cavity and the second cavity to communicate with the easily-blocked area, and then sundries in the easily-blocked area are pushed to the position far away from the filter screen through reciprocating motion of the scraper, so that the sundries are far away from the suction force range of the water pumping pipe; the impurities are alternately pushed into the first cavity and the second cavity and sucked away by the two sewage draining assemblies, so that the impurities are thoroughly cleaned away from the river, the situation that the impurities are always left in the river and the filter screen is blocked when the water pumping pipe pumps water subsequently is avoided, the water pumping pipe does not need to be shut down in the whole cleaning process, and the cleaning efficiency is improved. And the continuity of sampling the sample water for detection is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality detection, and in particular to a river water pollution detection device and a use method thereof. Background Art

[0002] In the continuous river water quality monitoring task, sampling devices play a vital role, especially those that need to stay underwater for a long time, facing severe anti-blocking challenges. Traditional sampling methods often extract samples through the negative pressure formed in the tube, and install a filter at the front end to prevent the invasion of large impurities. However, as the use time accumulates, the filter will inevitably be gradually blocked by tiny sediments, algae, fibers, etc., seriously affecting the accuracy of sampling and the working efficiency of the device.

[0003] In view of the above technical problems, in order to clean the filter screen, for example, the patent announcement number is CN219370695U, and its main technical means is that when there is impurities accumulated on the outer surface of the inner filter screen, the outer scraper rod and the inner scraper rod are rotated, and the clamping of the outer scraper rod and the inner scraper rod causes the inner filter screen to deform, so that the outer scraper rod scrapes the outer surface of the inner filter screen. After analysis by the applicant, the disadvantage of this technical solution is that when the pumping operation does not stop, the negative pressure state will continue to act on the inner filter screen, and the debris near the inner filter screen will be sucked. At this time, the outer scraper rod passes The circular motion cleans the debris on the outer wall of the inner filter screen, but during the process of the outer scraper rod scraping the debris, the debris is always pushed by the outer scraper rod to move around the outer wall of the inner filter screen, and as the height of the debris accumulation increases, the debris will pass over the outer scraper rod and return to the inner filter screen again, so that the debris cannot be effectively removed. The only way to achieve effective cleaning is to stop pumping and allow the scraped debris to naturally settle in the water. Based on this, the present invention purposely provides a river water pollution detection device and a method of use thereof, which can thoroughly clean the debris that causes filter screen blockage under the premise of continuous pumping operation. Summary of the invention

[0004] The purpose of the present invention is to provide a river water pollution detection device and its use method to address the deficiencies of the prior art, so as to solve the technical problem that impurities are quickly re-adsorbed after being scraped off the filter due to the continuous negative pressure of the suction pipe.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A river water pollution detection device, comprising: A fixed frame is located in the water and fixedly mounted with a water pumping pipe, a filter screen is fixedly mounted at the water inlet end of the water pumping pipe, and a water outlet end of the water pumping pipe is connected with a collecting component, and the collecting component is connected with a detecting component, and the area directly below the filter screen is an easily blocked area; A movable frame is slidably sleeved on the water inlet end of the water pumping pipe. The movable frame is driven to rise and fall by a driving source fixedly mounted on the fixed frame. A first chamber and a second chamber are provided inside the movable frame. The first chamber and the second chamber are respectively connected to two sewage discharge components, and the two are symmetrically arranged. A scraper is slidably mounted inside the movable frame. The scraper is driven to move by an output source fixedly mounted on the movable frame. A flow monitoring component is arranged in the water suction pipe and is connected to a driving source and an output source. When the flow monitoring component monitors that the flow in the water suction pipe is less than a threshold value, the driving source drives the movable frame to descend, so that the first chamber and the second chamber are connected to the easily blocked area, and the output source drives the scraper to move back and forth between the first chamber and the second chamber. During this process, the scraper scrapes the bottom of the filter screen, and the scraper pushes the debris in the easily blocked area into the first chamber and the second chamber alternately, and the two sewage discharge components clean the first chamber and the second chamber respectively; when the debris is cleaned, the driving source drives the movable frame to rise, so that the water suction pipe blocks the first chamber and the second chamber.

[0006] As a further solution of the present invention: the water pumping pipe is provided with temporary through holes arranged in a circumference, the outer wall of the water pumping pipe is slidably sleeved with a conical sleeve, the bottom end of the conical sleeve is fixedly mounted on the movable frame, and it slides with the temporary through hole. When the movable frame descends, the conical sleeve and the temporary through hole are misaligned, and water enters the water pumping pipe through the temporary through hole and the filter net; when the movable frame rises, the conical sleeve blocks the temporary through hole, and water enters the water pumping pipe through the filter net.

[0007] As a further solution of the present invention: the top end of the conical sleeve abuts against the outer wall of the water pumping pipe.

[0008] As a further solution of the present invention: a side plate is fixedly mounted on the scraper, the distance between the side plate and the axis of the filter is greater than the radius of the filter, and the side plate is plugged and matched with the first chamber and the second chamber.

[0009] As a further solution of the present invention: a cavity is provided on the scraper, and a cleaning roller is rotatably installed in the cavity. When the output source drives the scraper to move back and forth, the scraper drives the cleaning roller to rotate through the driving component, and during this process, the cleaning roller contacts the bottom of the filter.

[0010] As a further solution of the present invention: the driving assembly includes a gear and a rack plate, the gear is rotatably mounted on the scraper and is coaxially fixedly connected to the cleaning roller, and the rack plate is fixedly mounted on the moving frame and meshes with the gear.

[0011] As a further solution of the present invention: a sliding cylinder is slidably connected to the inner wall of the water pumping pipe, a through groove is opened on the water pumping pipe, the top end of the sliding cylinder is arranged through the through groove, and the top end is fixedly connected to the top end of the conical sleeve. When the movable frame descends, the conical sleeve drives the sliding cylinder to descend synchronously, and the bottom end of the sliding cylinder abuts against the filter net; when the movable frame rises, the conical sleeve drives the sliding cylinder to rise synchronously, and the conical sleeve and the sliding cylinder synchronously block the temporary through hole and the through groove.

[0012] As a further solution of the present invention: the radius of the tapered sleeve decreases upward along its axis.

[0013] A method for using a river water pollution detection device, the method is applied to a river water pollution detection device as described above, the method comprises the following steps: Step S1: Place the fixing frame in water, and extract river water through the pumping pipe. The debris is intercepted by the filter in the easy-to-block area, and the river water passing through the filter enters the collection component as a sample, and then the sample is tested by the detection component; Step S2: When the flow monitoring component in the water pump detects that the flow is less than the threshold value, the filter screen is blocked. At this time, the filter screen and the easily blocked area are cleaned; Step S3: The driving source then drives the moving frame to descend until the first chamber and the second chamber are connected to the easily blocked area, and then the output source drives the scraper to move back and forth between the first chamber and the second chamber. During this process, the scraper scrapes the bottom of the filter screen, and the scraper pushes the debris in the easily blocked area into the first chamber and the second chamber alternately, and the two sewage discharge components clean the first chamber and the second chamber respectively; Step S4: After the debris is cleaned, the scraper is driven by the output source to move into the first chamber, and then the driving source drives the movable frame to rise and reset, so that the pumping pipe blocks the first chamber and the second chamber; Step S5: Continuously monitor the flow rate in the water pumping pipe through the flow monitoring component. When the flow rate is less than the threshold, repeat steps S3-S4.

[0014] Beneficial effects of the present invention: 1. In the present invention, when the filter screen is clogged, the mobile frame descends to the first chamber and the second chamber to communicate with the easily clogged area. At this time, the first chamber and the second chamber will generate suction under the action of their respective sewage discharge components, thereby counteracting the suction force of the water pumping pipe on the debris in the easily clogged area. Subsequently, the debris in the easily clogged area is pushed to a position away from the filter screen mainly through the reciprocating movement of the scraper, so that the debris is away from the suction range of the water pumping pipe, and the debris is alternately pushed into the first chamber and the second chamber, so as to be sucked away by the two sewage discharge components, so that the debris is completely cleaned from the river, avoiding the situation that the debris always stays in the river and the filter screen is blocked when the subsequent water pumping pipe is pumping water, and the water pumping pipe does not need to be shut down during the entire cleaning process, thereby ensuring the continuity of extracting sample water for testing; 2. In the present invention, a temporary through hole is opened on the water pumping pipe. When the mobile frame descends, the conical sleeve is misaligned with the temporary through hole. At this time, water enters the water pumping pipe through the temporary through hole and the filter screen. At this time, the river water flow in the water pumping pipe will immediately return to normal, thereby ensuring the efficiency of extracting river water samples, and releasing the negative pressure of the water pumping pipe on the filter screen, reducing the adsorption force on the debris under the filter screen, which is more conducive to the cleaning work; 3. In the present invention, when the scraper moves, the scraper will drive the cleaning roller to rotate through the driving assembly, so that the fine particles stuck in the pores will be taken out by the rotation of the cleaning roller immediately after scraping, and enter the two chambers through the gap of the cavity and be cleaned up, which can further optimize the cleaning effect of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the bottom of the mobile frame in the present invention; Figure 3 The present invention Figure 1 A schematic diagram of the structure in cross-section; Figure 4 It is a schematic diagram of the structure after the movable frame of the present invention is lowered; Figure 5 The present invention Figure 4 A schematic diagram of the structure in cross-section; Figure 6 It is a schematic diagram of the position structure of the scraper and the filter screen in the present invention; Figure 7 The present invention Figure 6 The enlarged structural diagram of part A in the middle; Figure 8 It is a structural schematic diagram of the scraper in the present invention; Fig. 9 It is a schematic structural diagram of a scraper in cross section in the present invention; Fig.10 It is a schematic diagram of the connection structure between the conical sleeve and the sliding sleeve in the present invention.

[0017] In the figure: 1, fixed frame; 2, suction pipe; 3, filter screen; 4, movable frame; 5, driving source; 6, first chamber; 7, scraper; 8, output source; 9, temporary through hole; 10, tapered sleeve; 11, side plate; 12, cleaning roller; 13, gear; 14, rack plate; 15, cavity; 16, sliding cylinder; 17, through groove; 18, limit rod; 19, guide rod; 20, driving assembly; 21, second chamber. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 10 As shown, the present invention is a river water pollution detection device, comprising: A fixed frame 1 is located in the water, and a water pumping pipe 2 is fixedly installed on it. A filter screen 3 is fixedly installed at the water inlet end of the water pumping pipe 2, and its water outlet end is connected with a collection component, and the collection component is connected with a detection component. The area directly below the filter screen 3 is prone to clogging; The movable frame 4 is slidably sleeved on the water inlet end of the water pumping pipe 2. The movable frame 4 is driven to rise and fall by a driving source 5 fixedly mounted on the fixed frame 1. A first chamber 6 and a second chamber 21 are provided therein. The first chamber 6 and the second chamber 21 are respectively connected to two sewage discharge components, and the two are symmetrically arranged. A scraper 7 is slidably mounted in the movable frame 4. The scraper 7 is driven to move by an output source 8 fixedly mounted on the movable frame 4. A flow monitoring component is arranged in the water suction pipe 2 and is connected to the driving source 5 and the output source 8. When the flow monitoring component monitors that the flow in the water suction pipe 2 is less than a threshold value, the driving source 5 drives the movable frame 4 to descend, so that the first chamber 6 and the second chamber 21 are connected to the easily blocked area, and the output source 8 drives the scraper 7 to move back and forth between the first chamber 6 and the second chamber 21. During this process, the scraper 7 scrapes the bottom of the filter screen 3, and the scraper 7 pushes the debris in the easily blocked area into the first chamber 6 and the second chamber 21 alternately, and the two sewage discharge components clean the first chamber 6 and the second chamber 21 respectively; when the debris is cleaned, the driving source 5 drives the movable frame 4 to rise, so that the water suction pipe 2 blocks the first chamber 6 and the second chamber 21.

[0020] In one case of the present embodiment, a limit rod 18 is fixedly installed on the movable frame 4, and the limit rod 18 is slidably connected to the scraper 7. Guide rods 19 are fixedly installed at the four corners of the top surface of the movable frame 4, and the guide rods 19 are slidably connected to the fixed frame 1. The driving source 5 and the output source 8 can be selected from reciprocating cylinders, electric telescopic rods and other components, and other mechanisms that can achieve linear reciprocating motion can also be selected. This embodiment is not specifically limited here; the collection component includes submersible pumps, water storage pipes, filters and other components; the detection component includes water quality sensors, data collectors, data transmission systems and other components; the flow monitoring component includes flow meters, sensors, PLC control systems and other components; the sewage discharge component includes sewage discharge hoses, vacuum pumps and other components. It should be noted that the above components are all prior art, and the present invention does not improve them. Therefore, it is not necessary to disclose their specific mechanical structures and circuit structures, and it does not affect the integrity of the present invention. In actual application of this embodiment, during the normal sampling phase, such as Figure 1-Figure 3 In the state shown, the fixing frame 1 is placed in the water, and river water can be extracted through the water pumping pipe 2. The debris is intercepted by the filter 3 in the easy-to-block area, and the river water passing through the filter 3 enters the collection component as a sample, and then the sample is tested by the detection component, so as to obtain the water pollution situation of the river. When the flow monitoring component in the water pumping pipe 2 detects that the flow is less than the threshold value, it is determined that the filter 3 needs to be cleaned; Then the driving source 5 drives the movable frame 4 to descend to the first chamber 6 and the second chamber 21 to communicate with the easily blocked area. At this time, the whole device enters the stage of cleaning debris. Figure 4-Figure 6 In the state shown, the first chamber 6 and the second chamber 21 will generate suction under the action of their respective sewage discharge components, thereby counteracting the suction force of the water pump 2 on the debris in the easily blocked area. Then the output source 8 drives the scraper 7 to move back and forth between the first chamber 6 and the second chamber 21. During this process, the scraper 7 scrapes the bottom of the filter screen 3, and the scraper 7 pushes the debris in the easily blocked area into the first chamber 6 and the second chamber 21 alternately. The two sewage discharge components respectively suck out and clean the debris in the first chamber 6 and the second chamber 21, as shown in FIG. Figure 5Taking the example shown in the figure, at this time, the scraper 7 pushes the debris in the easily blocked area from right to left into the first chamber 6. At this time, the scraper 7 blocks the first chamber 6 and the water pumping pipe 2, so that the debris in the first chamber 6 is not affected by the suction of the water pumping pipe 2, and the sewage discharge component can suck away the debris in the first chamber 6 through suction. In this way, the scraper 7 moves back and forth, and the debris blocking the filter 3 can be gradually cleaned up, and the river water can pass through the filter 3 smoothly. When the flow monitoring component detects that the flow in the water pumping pipe 2 has recovered to above the threshold, the scraper 7 is driven by the output source 8 to move to the first chamber 6 to prevent the scraper 7 from hindering the moving frame 4 from rising. Then the driving source 5 drives the moving frame 4 to rise and reset, so that the water pumping pipe 2 blocks the first chamber 6 and the second chamber 21. At this time, the whole device returns to the normal sampling stage. Figure 1-Figure 3 Status shown; Furthermore, the guide rod 19 can improve the stability of the movable frame 4 when it is lifted or lowered, and the limit rod 18 can also improve the stability of the scraper 7 when it is reciprocating.

[0021] like Figure 3-Figure 6 As shown, as a preferred embodiment of the present invention, the water pumping pipe 2 is provided with temporary through holes 9 arranged circumferentially, and the outer wall of the water pumping pipe 2 is slidably sleeved with a conical sleeve 10, and the bottom end of the conical sleeve 10 is fixedly mounted on the movable frame 4, and it slides with the temporary through hole 9. When the movable frame 4 descends, the conical sleeve 10 is misaligned with the temporary through hole 9, and water enters the water pumping pipe 2 through the temporary through hole 9 and the filter screen 3; when the movable frame 4 rises, the conical sleeve 10 blocks the temporary through hole 9, and water enters the water pumping pipe 2 through the filter screen 3.

[0022] In actual application of this embodiment, when the filter screen 3 is blocked, the amount of water entering the water extraction pipe 2 through the filter screen 3 will be reduced, resulting in a decrease in the efficiency of extracting sample water. This problem can only be solved until the filter screen 3 is thoroughly cleaned. In the process of cleaning the debris, the negative pressure of the water extraction pipe 2 will act on the filter screen 3 to continuously absorb the debris in the easily blocked area. By opening a temporary through hole 9 on the water extraction pipe 2, when the mobile frame 4 descends, the conical sleeve 10 is misaligned with the temporary through hole 9. At this time, water enters the water extraction pipe 2 through the temporary through hole 9 and the filter screen 3. Figure 4 and Figure 5 In the state shown, the river water flow in the water pumping pipe 2 will immediately return to normal, thereby ensuring the efficiency of extracting river water samples, and can release the negative pressure of the water pumping pipe 2 on the filter screen 3, reducing the adsorption force on the debris under the filter screen 3, which is more conducive to the cleaning work. It should be noted that in this embodiment, the flow monitoring component cannot control the entire device from the debris cleaning stage to the normal sampling stage based on whether the flow in the water pumping pipe 2 is restored to above the threshold, but needs to allow the entire device to automatically return to the normal sampling stage after the debris cleaning stage lasts for a period of time, ensuring that sufficient time is given to clean the debris; like Figure 3-Figure 6 As shown, as a preferred embodiment of the present invention, the top end of the conical sleeve 10 abuts against the outer wall of the water suction pipe 2.

[0023] In actual application of this embodiment, when water enters the water pumping pipe 2 from the temporary through hole 9, there is a problem that debris will be intercepted at the temporary through hole 9, and the top of the conical sleeve 10 abuts against the outer wall of the water pumping pipe 2. When the conical sleeve 10 rises, it will directly scrape the temporary through hole 9, thereby directly cleaning up the debris and avoiding clogging at the temporary through hole 9.

[0024] like Figure 8 As shown, as a preferred embodiment of the present invention, a side plate 11 is fixedly mounted on the scraper 7, the distance between the side plate 11 and the axis of the filter screen 3 is greater than the radius of the filter screen 3, and it is plugged into and matched with the first chamber 6 and the second chamber 21.

[0025] In actual application of this embodiment, the side plate 11 can prevent the debris from moving out of the suction range of the two chambers on both sides of the scraper 7 during the process of the scraper 7 pushing the debris, thereby increasing the amount of debris cleaned at a single time and shortening the time required for cleaning.

[0026] like Figure 1-Figure 9 As shown, as a preferred embodiment of the present invention, a cavity 15 is opened on the scraper 7, and a cleaning roller 12 is rotatably installed in the cavity 15. When the output source 8 drives the scraper 7 to move back and forth, the scraper 7 drives the cleaning roller 12 to rotate through the driving component 20. During this process, the cleaning roller 12 contacts the bottom of the filter screen 3.

[0027] In actual application of this embodiment, when the scraper 7 scrapes the bottom of the filter screen 3, small debris will be stuck in the pores of the filter screen 3. When the scraper 7 moves, the driving component 20 will drive the cleaning roller 12 to rotate, so that the small debris stuck in the pores will be taken out immediately after scraping through the rotation of the cleaning roller 12. This can further optimize the cleaning effect of the filter screen 3. When the sewage discharge component cleans the debris in the first chamber 6 and the second chamber 21, the suction force it generates will make water pass through the narrow channel of the cavity 15. The narrow channel makes the water flow faster, which can also play a role in cleaning the debris in the cavity 15.

[0028] like Figure 1-Figure 8 As shown, as a preferred embodiment of the present invention, the driving assembly 20 includes a gear 13 and a rack plate 14, the gear 13 is rotatably mounted on the scraper 7, and is coaxially fixedly connected to the cleaning roller 12, and the rack plate 14 is fixedly mounted on the mobile frame 4 and meshes with the gear 13.

[0029] In actual application of this embodiment, through the meshing of the gear 13 and the rack plate 14, when the scraper 7 moves back and forth to scrape and clean the filter screen 3, the gear 13 will rotate under the action of the rack plate 14, thereby driving the cleaning roller 12 to rotate. In this way, the cleaning roller 12 can be automatically rotated when the scraper 7 moves, and the movement of the scraper 7 can be reasonably utilized to save the power source for driving the cleaning roller 12.

[0030] like Figure 1-Figure 10 As shown, as a preferred embodiment of the present invention, the inner wall of the water pumping pipe 2 is slidably connected with a sliding cylinder 16, and a through groove 17 is opened on the water pumping pipe 2. The top end of the sliding cylinder 16 is arranged through the through groove 17, and the top end is fixedly connected to the top end of the conical sleeve 10. When the movable frame 4 descends, the conical sleeve 10 drives the sliding cylinder 16 to descend synchronously, and the bottom end of the sliding cylinder 16 abuts against the filter screen 3; when the movable frame 4 rises, the conical sleeve 10 drives the sliding cylinder 16 to rise synchronously, and the conical sleeve 10 and the sliding cylinder 16 synchronously block the temporary through hole 9 and the through groove 17.

[0031] In actual application of this embodiment, when the movable frame 4 descends, the conical sleeve 10 drives the sliding cylinder 16 to descend synchronously through the end of the sliding cylinder 16 penetrating the through groove 17, so that the bottom end of the sliding cylinder 16 abuts against the filter screen 3, thereby providing support for the filter screen 3 and preventing the pressure of the scraper 7 on the filter screen 3 from causing excessive deformation of the filter screen 3.

[0032] like Figure 4-Figure 10 As shown, as a preferred embodiment of the present invention, the radius of the tapered sleeve 10 decreases upward along its axis.

[0033] In practical application, if Figure 4 and Fig.10 As shown, when the cleaning piece cleans the debris intercepted by the temporary through hole 9, the debris can move along the inclined surface of the conical sleeve 10, avoiding the problem of the debris being pushed upward all the time and being squeezed into the pores.

[0034] See also Figure 1-Figure 10 As shown, the present invention is a method for using a river water pollution detection device, the method is applied to a river water pollution detection device as described in the above embodiment, and the method comprises the following steps: Step S1: The fixing frame 1 is placed in water, and river water can be extracted through the pumping pipe 2. The debris is intercepted by the filter 3 in the easy-to-block area, and the river water passing through the filter 3 enters the collection component as a sample, and then the sample is tested by the detection component; Step S2: When the flow monitoring component in the water pumping pipe 2 detects that the flow is less than the threshold value, the filter 3 is blocked. At this time, the filter 3 and the easily blocked area are cleaned; Step S3: Then the driving source 5 drives the moving frame 4 to descend to the first chamber 6 and the second chamber 21 to communicate with the easily blocked area, and then the output source 8 drives the scraper 7 to move back and forth between the first chamber 6 and the second chamber 21. During this process, the scraper 7 scrapes the bottom of the filter screen 3, and the scraper 7 pushes the debris in the easily blocked area into the first chamber 6 and the second chamber 21 alternately, and the two sewage discharge components clean the first chamber 6 and the second chamber 21 respectively; Step S4: After the debris is cleaned, the scraper 7 is driven by the output source 8 to move into the first chamber 6, and then the driving source 5 drives the movable frame 4 to rise and reset, so that the water pump 2 blocks the first chamber 6 and the second chamber 21; Step S5: Continuously monitor the flow rate in the water pumping pipe 2 through the flow monitoring component. When the flow rate is less than the threshold, repeat steps S3 to S4.

[0035] Working principle of the present invention: The above embodiment of the present invention provides a river water pollution detection device and a method of using the same. When the water pump 2 extracts river water samples, the filter 3 plays a role in intercepting debris. After long-term operation, the filter 3 is gradually blocked. At this time, the flow monitoring component in the water pump 2 detects that the flow is less than the threshold value, thereby judging that the filter 3 needs to be cleaned. Then the driving source 5 drives the movable frame 4 to descend to the first chamber 6 and the second chamber 21 to connect with the easy-to-block area. At this time, the first chamber 6 and the second chamber 21 will generate suction under the action of their respective sewage discharge components, thereby counteracting the suction of the water pump 2 on the debris in the easy-to-block area. Then the output source 8 drives the scraper 7 to move back and forth between the first chamber 6 and the second chamber 21. During this process, the scraper 7 scrapes the bottom of the filter 3, and the scraper 7 pushes the debris in the easy-to-block area alternately into the first chamber 6 and the second chamber 21. The two sewage discharge components respectively suck out and clean the debris in the first chamber 6 and the second chamber 21.

[0036] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A river water pollution detection device, characterized in that: include: A fixed frame (1) is located in water and has a water extraction pipe (2) fixedly mounted thereon; a filter screen (3) is fixedly mounted on the water inlet end of the water extraction pipe (2); the water outlet end of the water extraction pipe (2) is connected to a collection component; the collection component is connected to a detection component; and a blockage-prone area is located directly below the filter screen (3); A movable frame (4) is slidably sleeved on the water inlet end of the water pumping pipe (2). The movable frame (4) is driven to rise and fall by a driving source (5) fixedly mounted on the fixed frame (1). A first chamber (6) and a second chamber (21) are provided in the movable frame. The first chamber (6) and the second chamber (21) are respectively connected to two sewage discharge components, and the two chambers are symmetrically arranged. A scraper (7) is slidably mounted in the movable frame (4). The scraper (7) is driven to move by an output source (8) fixedly mounted on the movable frame (4). A flow monitoring component is arranged in a water pumping pipe (2) and is connected to a driving source (5) and an output source (8). When the flow monitoring component monitors that the flow in the water pumping pipe (2) is less than a threshold value, the driving source (5) drives the movable frame (4) to descend, so that the first chamber (6) and the second chamber (21) are connected to the easily blocked area. The output source (8) drives the scraper (7) to move back and forth between the first chamber (6) and the second chamber (21). During this process, the scraper (7) scrapes the bottom of the filter screen (3), and the scraper (7) pushes the debris in the easily blocked area into the first chamber (6) and the second chamber (21) alternately. The two sewage discharge components clean the first chamber (6) and the second chamber (21) respectively. When the debris is cleaned, the driving source (5) drives the movable frame (4) to ascend, so that the water pumping pipe (2) blocks the first chamber (6) and the second chamber (21).

2. A river water pollution detection device according to claim 1, characterized in that: The water extraction pipe (2) is provided with temporary through holes (9) arranged in a circumference. The outer wall of the water extraction pipe (2) is slidably sleeved with a conical sleeve (10). The bottom end of the conical sleeve (10) is fixedly mounted on the movable frame (4) and is slidably matched with the temporary through holes (9). When the movable frame (4) descends, the conical sleeve (10) and the temporary through holes (9) are misaligned. At this time, water enters the water extraction pipe (2) through the temporary through holes (9) and the filter screen (3); when the movable frame (4) ascends, the conical sleeve (10) blocks the temporary through holes (9). At this time, water enters the water extraction pipe (2) through the filter screen (3).

3. A river water pollution detection device according to claim 2, characterized in that: The top end of the conical sleeve (10) abuts against the outer wall of the water pumping pipe (2).

4. A river water pollution detection device according to claim 1, characterized in that: A side plate (11) is fixedly mounted on the scraper (7); the distance between the side plate (11) and the axis of the filter screen (3) is greater than the radius of the filter screen (3), and the side plate (11) is plug-fitted with the first chamber (6) and the second chamber (21).

5. A river water pollution detection device according to claim 1, characterized in that: The scraper (7) is provided with a cavity (15), and a cleaning roller (12) is rotatably mounted in the cavity (15). When the output source (8) drives the scraper (7) to move back and forth, the scraper (7) drives the cleaning roller (12) to rotate via the driving assembly (20), and during this process, the cleaning roller (12) contacts the bottom of the filter screen (3).

6. A river water pollution detection device according to claim 5, characterized in that: The driving assembly (20) comprises a gear (13) and a rack plate (14); the gear (13) is rotatably mounted on the scraper (7) and is coaxially fixedly connected to the cleaning roller (12); the rack plate (14) is fixedly mounted on the moving frame (4) and meshes with the gear (13).

7. A river water pollution detection device according to claim 2, characterized in that: The inner wall of the water pumping pipe (2) is slidably connected to a sliding cylinder (16), and a through groove (17) is provided on the water pumping pipe (2). The top end of the sliding cylinder (16) passes through the through groove (17) and is fixedly connected to the top end of the conical sleeve (10). When the movable frame (4) descends, the conical sleeve (10) drives the sliding cylinder (16) to descend synchronously, and the bottom end of the sliding cylinder (16) abuts against the filter screen (3); when the movable frame (4) rises, the conical sleeve (10) drives the sliding cylinder (16) to rise synchronously, and the conical sleeve (10) and the sliding cylinder (16) synchronously block the temporary through hole (9) and the through groove (17).

8. A river water pollution detection device according to claim 3, characterized in that: The radius of the tapered sleeve (10) decreases upward along its axis.

9. A method for using a river water pollution detection device, characterized in that: The method is applied to a river water pollution detection device as claimed in any one of claims 1 to 8, and the method comprises the following steps: Step S1: placing the fixing frame (1) in water, and extracting river water through the pumping pipe (2). Debris is intercepted by the filter screen (3) in the easily blocked area. The river water passing through the filter screen (3) enters the collection component as a sample, and then the sample is tested by the detection component; Step S2: When the flow monitoring component in the water pumping pipe (2) detects that the flow rate is less than the threshold value, the filter screen (3) is blocked. At this time, the filter screen (3) and the easily blocked area are cleaned; Step S3: the driving source (5) then drives the movable frame (4) to descend until the first chamber (6) and the second chamber (21) are connected to the easily blocked area, and then the output source (8) drives the scraper (7) to move back and forth between the first chamber (6) and the second chamber (21). During this process, the scraper (7) scrapes the bottom of the filter screen (3), and the scraper (7) pushes the debris in the easily blocked area into the first chamber (6) and the second chamber (21) alternately. The two sewage discharge components clean the first chamber (6) and the second chamber (21) respectively. Step S4: After the debris is cleared, the scraper (7) is driven by the output source (8) to move into the first chamber (6), and then the driving source (5) drives the movable frame (4) to rise and reset, so that the water pump (2) blocks the first chamber (6) and the second chamber (21); Step S5: Continuously monitor the flow rate in the water pumping pipe (2) through the flow monitoring component. When the flow rate is less than the threshold value, repeat steps S3 to S4.

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