Water quality detection large particle impurity filtering device and filtering method

Abstract

The application discloses a large-particle impurity filtering device and filtering method for water quality detection, and belongs to the technical field of water quality detection. The large-particle impurity filtering device for water quality detection comprises a shell, and a water inlet is arranged on the shell. The filtering structure is arranged. When the device is used, the filter screen filters the water to be filtered. When the filter screen is used for a period of time, the second motor is started, the second motor drives the transmission wheel to rotate, the rotating shaft drives the annular plate to rotate by 180 DEG, the positions of the two filter screens are exchanged, the cleaning brush cleans the impurities on the circular fixed plate and the sealing cover, the impurities are moved to the position of the impurity discharge port, the impurities do not affect the water quality detection, the filter screen of the filtering device can be alternately used, manual cover opening and cleaning are not needed, and the filtering device does not affect the efficiency of the water quality detection.

Description

Technical Field

[0001] This invention belongs to the field of water quality testing technology, specifically relating to a large particle impurity filtration device and filtration method for water quality testing. Background Technology

[0002] Water quality testing is essential for assessing water quality and ensuring its safety and suitability. It allows for monitoring and evaluating the degree of pollution in water bodies, enabling timely protection and remediation measures to safeguard the health of aquatic ecosystems. Furthermore, water quality testing forms the basis of water treatment and purification processes. By monitoring and analyzing water quality, the types and concentrations of pollutants present can be determined, allowing for the selection of appropriate water treatment methods and equipment to ensure the provision of safe and clean water.

[0003] In the process of water quality testing, in order to ensure accuracy and reliability, it is usually necessary to use a large particle impurity filter to filter particulate matter in the water. In the existing technology, the large particle impurity filter can filter and separate large particles in the water to be tested. However, after long-term use, impurities will accumulate in the filter screen, causing the filter screen to become clogged, which will affect the quality and efficiency of water quality testing. At the same time, the clogged filter screen needs to be cleaned manually, which leads to an increase in labor costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a large particle impurity filtration device and filtration method for water quality testing.

[0005] The technical solution adopted to solve the above-mentioned technical problems is: a large particle impurity filtration device for water quality testing, including a shell, an inlet on the shell, an outlet at the bottom of the inlet, a discharge port near the outlet, several columns on any side of the shell, a filtration structure inside the shell, several fixing rings evenly distributed around the outer circumference of the shell, support frames on both sides of the shell, the shell and the support frames being fixedly connected, a support plate fixedly connected to the bottom surface of the support frame, support legs fixedly connected to the four corners of the bottom surface of the support plate, a circular fixing plate fixedly connected to the side of the shell away from the columns, a through hole on the circular fixing plate, and a cleaning mechanism on the side of the circular fixing plate away from the shell.

[0006] With the above technical solution, the inlet is used to inject water to be filtered into the filter device, the filtered water will be output from the outlet, the impurity outlet is used to output water containing impurities, and the support frame and support legs provide support for the filter device.

[0007] Furthermore, the filter structure includes an annular plate, on which a first reserved hole, a second reserved hole, and a third reserved hole are symmetrically arranged. A rotating shaft is located at the center of the annular plate, and connecting slots are symmetrically arranged on the rotating shaft. A frame is provided in each of the two connecting slots, and a filter screen is provided in each of the two frames.

[0008] With the above technical solution, the first reserved hole corresponds to the water inlet, the second reserved hole corresponds to the water outlet, and the third reserved hole corresponds to the impurity discharge port. The frame can be removed from the connecting slot, making it convenient for staff to replace the filter screen. At the same time, the filter screen will filter out large particles of impurities in the water flow, so that the large particles of impurities are blocked by the filter screen.

[0009] Furthermore, a rotating shaft is provided at the center of the annular plate, and baffles are symmetrically arranged on the rotating shaft. Two baffles are fixedly connected to the rotating shaft, and the side of the two baffles away from the rotating shaft is fixedly connected to the annular plate. Connecting plates are symmetrically arranged on the rotating shaft near the two baffles, and two connecting plates are fixedly connected to the rotating shaft. The end of the two connecting plates away from the rotating shaft is fixedly connected to the annular plate. Cleaning brushes are provided on both sides of the two connecting plates.

[0010] Through the above technical solution, the baffle will limit the position of the water flow, so that the water will not flow to the other side. When the rotating shaft rotates, it will drive the annular plate to rotate together. When the connecting plate rotates, the cleaning brush will clean the impurities on the circular fixed plate and the sealing cover, so that the impurities can move to the other side with the annular plate.

[0011] Furthermore, a connecting rod is fixedly connected to one end of the rotating shaft near the circular fixed plate. The connecting rod passes through the circular fixed plate, and a mounting plate is provided at the bottom end of the connecting rod. The mounting plate is fixedly connected to the support plate. Both the mounting plate and the connecting rod are provided with transmission wheels. The upper transmission wheel is fixedly connected to the connecting rod, and the lower transmission wheel is rotatably connected to the mounting plate. A second motor is provided on the side of the lower transmission wheel away from the annular plate. The second motor is mounted on the top surface of the support plate, and the lower transmission wheel is fixedly connected to the output shaft of the second motor. The two transmission wheels are connected by a transmission belt.

[0012] Through the above technical solution, the second motor can be set as a stepper motor, so that the rotation angle of the rotating shaft is precisely controllable. When the second motor rotates, it will drive the transmission wheel to rotate, thereby causing the rotating shaft to rotate.

[0013] Furthermore, the cleaning mechanism includes a square cover, which is fixedly connected to a circular fixed plate. A first sliding groove is provided on the bottom inner surface of the square cover. A water pipe limiting bracket is fixedly connected to the bottom inner surface of the square cover away from the circular fixed plate by bolts. A second sliding groove is provided on the top surface of the first sliding groove.

[0014] With the above technical solution, the cleaning water pipe can pass through the water pipe limit frame to prevent the cleaning water pipe from obstructing the movement of the water pipe connector.

[0015] Furthermore, a first sliding rod is provided in the first chute, and a water pipe connector is fixedly connected to the top surface of the first sliding rod. A rotating sprayer is installed on the side of the water pipe connector near the circular fixed plate. A second sliding rod is fixedly connected to the top surface of the water pipe connector. The second sliding rod is disposed in the second chute. A movable plate is fixedly connected to the top surface of the second chute. A first motor is installed on the top surface of the movable plate. A gear is fixedly connected to the output shaft of the first motor. A rack is fixedly connected to the top surface of the square cover near the first motor. The rack meshes with the gear.

[0016] With the above technical solution, when the first motor starts, it will drive the gear to rotate, causing the water pipe connector to move, allowing the rotary sprayer to pass through the through hole and enter the interior of the annular plate. Then, starting the rotary sprayer can clean the filter screen and the interior of the annular plate.

[0017] Furthermore, a sealing cover is provided on the side of the outer shell away from the circular fixing plate, and a number of circular grooves are provided on the side of the sealing cover near the outer shell. The size of the circular grooves is the same as the size of the column. A number of mounting grooves are provided on the outer wall of the sealing cover, and an electromagnet is installed in each mounting groove. A fixing column is fixedly connected to the push-pull rod of each electromagnet.

[0018] With the above technical solution, a sealing strip is provided on the side of the sealing cover near the outer shell to prevent water from flowing out. When the electromagnet is activated, it pushes the fixing column, which is then moved into the fixing collar to fix the sealing cover.

[0019] Furthermore, an auxiliary handle is fixedly connected to the side of the sealing cap away from the outer casing.

[0020] The above technical solution allows the auxiliary handle to facilitate the operation of the sealing cover by staff.

[0021] Furthermore, a sedimentation tank is provided at the bottom of the discharge port, and a liquid outlet is provided on either side of the sedimentation tank.

[0022] Through the above technical solution, water containing impurities will be discharged into the sedimentation tank. After sedimentation, cleaner water can be taken out from the outlet, allowing for water recycling and reducing water waste.

[0023] A filtration method for a large particulate impurity filtration device for water quality testing includes the following specific steps:

[0024] S1. Water to be filtered is injected into the circular fixed plate through the water inlet. When the water flows through the filter screen, the filter screen will filter out large particles of impurities in the water, so that the large particles of impurities are blocked on the filter screen.

[0025] S2. The filtered water will flow to the outlet, and a liquid pipe can be connected to the outlet to transfer the filtered water to the designated location.

[0026] S3. After the filter device has been used for a certain period of time, large particles of impurities may accumulate on the filter screen. At this time, first connect the water source to the water pipe connector, then start the second motor to drive the transmission wheel to rotate, so that the rotating shaft drives the ring plate to rotate 180°. During the rotation, the cleaning brush will clean the impurities on the inside of the circular fixed plate and the sealing cover, and move the impurities along with it.

[0027] S4. After the annular plate has rotated, start the first motor to make the first motor rotate, so that the water pipe connector moves towards the circular fixed plate, so that the rotating sprayer passes through the through hole. Then use the rotating sprayer to clean the inside of the annular plate and the filter screen, so that the impurities are transported to the discharge port with the water flow.

[0028] S5. Water containing impurities will flow into the sedimentation tank through the discharge port and settle there, causing the impurities to settle at the bottom of the sedimentation tank. At this time, relatively clean water can be collected from the outlet and recycled, so that the filter screen of the filtration device does not need to be cleaned manually and water resources are reduced.

[0029] The beneficial effects of this invention are as follows:

[0030] (1) By setting up a filter structure, the filter screen will filter the water to be filtered when in use. After the filter screen has been used for a period of time, the second motor will be started, which will drive the transmission wheel to rotate and drive the rotating shaft to rotate the ring plate 180° so that the positions of the two filter screens will be exchanged. At the same time, the cleaning brush will clean the impurities on the circular fixed plate and the sealing cover, so that the impurities will be moved to the position of the discharge port to avoid the impurities affecting the water quality test. The filter screens of the filter device can be used alternately without waiting for manual opening and cleaning, so that the filter device will not affect the efficiency of water quality test.

[0031] (2) By setting up a cleaning structure, the first motor is started, the gear rotates, and the water pipe connector drives the rotary sprayer to move, so that the rotary sprayer moves through the through hole to the inside of the annular plate. Then the rotary sprayer is started to clean the filter screen and the annular plate, so that the filter screen of the filter device does not need to be cleaned manually, reducing the labor intensity of the staff, saving cleaning time, and reducing labor costs.

[0032] (3) By setting up a sedimentation tank, water containing impurities will be discharged into the sedimentation tank through the impurity discharge port. After sedimentation, relatively clean water can be taken out from the liquid outlet, which can recycle the water and reduce the waste of water resources. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0034] Figure 2 This is a second-view schematic diagram of the present invention;

[0035] Figure 3 This is a schematic diagram of the internal structure of the outer shell in this invention;

[0036] Figure 4 This is a three-dimensional schematic diagram of the filter structure in this invention;

[0037] Figure 5 This is a second-view schematic diagram of the filtering structure in this invention;

[0038] Figure 6 This is a three-dimensional schematic diagram of the cleaning mechanism in this invention;

[0039] Figure 7 This is a schematic diagram of the sealing cap structure in this invention;

[0040] Figure 8 This is a cross-sectional view of the sealing cap in this invention.

[0041] Reference numerals: 1. Outer shell; 101. Inlet; 102. Outlet; 103. Waste discharge port; 104. Column; 2. Circular fixing plate; 201. Through hole; 3. Support frame; 4. Support plate; 5. Support leg; 6. Cleaning mechanism; 601. Square cover; 602. First chute; 603. First sliding rod; 604. Water pipe limit frame; 605. Water pipe connector; 606. Rotary sprayer; 607. Second sliding rod; 608. Second chute; 609. Moving plate; 610. First motor; 611. Gear; 612. Rack; 7. Filter structure; 701 702. Annular plate; 703. First reserved hole; 704. Second reserved hole; 705. Third reserved hole; 706. Rotating shaft; 707. Connecting slot; 708. Baffle; 709. Connecting plate; 710. Cleaning brush; 711. Frame; 712. Filter screen; 713. Mounting plate; 714. Connecting rod; 715. Transmission wheel; 716. Second motor; 717. Transmission belt; 8. Fixing collar; 9. Sealing cover; 901. Circular groove; 902. Mounting groove; 903. Fixing column; 904. Electromagnet; 10. Auxiliary handle; 11. Sedimentation tank; 1101. Liquid outlet. Detailed Implementation

[0042] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0043] like Figure 1 , Figure 2 and Figure 3 As shown in this embodiment, a large particle impurity filtration device for water quality testing is provided. The device includes a housing 1, an inlet 101 on the housing 1, an outlet 102 at the bottom of the inlet 101, a discharge port 103 near the outlet 102, several columns 104 on any side of the housing 1, a filter structure 7 inside the housing 1, several fixing rings 8 evenly distributed around the outer wall of the housing 1, support frames 3 on both sides of the housing 1, the housing 1 and the support frames 3 are fixedly connected, a support plate 4 is fixedly connected to the bottom surface of the support frame 3, support legs 5 are fixedly connected to the four corners of the bottom surface of the support plate 4, a circular fixing plate 2 is fixedly connected to the side of the housing 1 away from the columns 104, a through hole 201 is provided on the circular fixing plate 2, and a cleaning mechanism 6 is provided on the side of the circular fixing plate 2 away from the housing 1.

[0044] A sedimentation tank 11 is provided at the bottom of the discharge port 103. An outlet 1101 is provided on any side of the sedimentation tank 11. An auxiliary handle 10 is fixedly connected to the side of the sealing cover 9 away from the outer shell 1. After water containing impurities is discharged into the sedimentation tank 11, the impurities will settle to the bottom of the sedimentation tank 11 over time, and the water above can be recycled, reducing the waste of water resources. The auxiliary handle 10 allows the staff to move the sealing cover 9 more easily, improving convenience.

[0045] like Figure 4 and Figure 5 As shown, the filter structure 7 includes an annular plate 701. The annular plate 701 has a first reserved hole 702 symmetrically arranged, a second reserved hole 703 symmetrically arranged, and a third reserved hole 704 symmetrically arranged. A rotating shaft 705 is arranged at the center of the annular plate 701. The rotating shaft 705 has connecting slots 706 symmetrically arranged. A frame 710 is arranged in each of the two connecting slots 706. A filter screen 711 is arranged in each of the two frames 710. The filter screen 711 will separate large particulate impurities in the water to avoid large particulate impurities affecting water quality testing.

[0046] A rotating shaft 705 is located at the center of the annular plate 701. Two baffles 707 are symmetrically arranged on the rotating shaft 705. The two baffles 707 are fixedly connected to the rotating shaft 705. The side of the two baffles 707 away from the rotating shaft 705 is fixedly connected to the annular plate 701. Two connecting plates 708 are symmetrically arranged near the two baffles 707 on the rotating shaft 705. The two connecting plates 708 are fixedly connected to the rotating shaft 705. The end of the two connecting plates 708 away from the rotating shaft 705 is fixedly connected to the annular plate 701. Cleaning brushes 709 are arranged on both sides of the two connecting plates 708. When in use, the cleaning brushes 709 will clean the impurities on the circular fixing plate 2 and the sealing cover 9 to prevent the impurities from affecting the subsequent filtration.

[0047] A connecting rod 713 is fixedly connected to one end of the rotating shaft 705 near the circular fixed plate 2. The connecting rod 713 passes through the circular fixed plate 2. A mounting plate 712 is provided at the bottom end of the connecting rod 713. The mounting plate 712 is fixedly connected to the support plate 4. Both the mounting plate 712 and the connecting rod 713 are provided with transmission wheels 714. The upper transmission wheel 714 is fixedly connected to the connecting rod 713, and the lower transmission wheel 714 is rotatably connected to the mounting plate 712. A second motor 715 is provided on the side of the lower transmission wheel 714 away from the annular plate 701. The second motor 715 is mounted on the top surface of the support plate 4. The lower transmission wheel 714 is fixedly connected to the output shaft of the second motor 715. The two transmission wheels 714 are connected by a transmission belt 716.

[0048] like Figure 6As shown, the cleaning mechanism 6 includes a square cover 601, which is fixedly connected to a circular fixed plate 2. A first sliding groove 602 is provided on the inner bottom surface of the square cover 601. A water pipe limiting bracket 604 is fixedly connected to the inner bottom surface of the square cover 601 away from the circular fixed plate 2 by bolts. A second sliding groove 608 is provided on the top surface of the first sliding groove 602. A first sliding rod 603 is provided in the first sliding groove 602. A water pipe connector 605 is fixedly connected to the top surface of the first sliding rod 603. The water pipe connector 605 is close to the circular fixed plate 2. A rotary sprayer 606 is installed on one side of the fixed plate 2. A second sliding rod 607 is fixedly connected to the top surface of the water pipe connector 605. The second sliding rod 607 is set in the second slide groove 608. A movable plate 609 is fixedly connected to the top surface of the second slide groove 608. A first motor 610 is installed on the top surface of the movable plate 609. A gear 611 is fixedly connected to the output shaft of the first motor 610. A rack 612 is fixedly connected to the top surface of the square cover 601 near the first motor 610. The rack 612 meshes with the gear 611.

[0049] like Figure 7 and Figure 8 As shown, a sealing cover 9 is provided on the side of the outer shell 1 away from the circular fixing plate 2. Several circular grooves 901 are provided on the side of the sealing cover 9 close to the outer shell 1. The size of the circular grooves 901 is the same as the size of the column 104. Several mounting grooves 902 are provided on the outer wall of the sealing cover 9. An electromagnet 904 is installed in each mounting groove 902. A fixing post 903 is fixedly connected to the push-pull rod of each electromagnet 904. When the fixing post 903 is pushed into the fixing collar 8, the sealing cover 9 will be fixed to prevent water leakage. At the same time, as long as all the electromagnets 904 are closed, the fixing post 903 can be moved out of the fixing collar, which is convenient for the staff to maintain the inside of the filter device.

[0050] A filtration method for a large particulate impurity filtration device for water quality testing includes the following specific steps:

[0051] S1. Water to be filtered is injected into the circular fixed plate 2 through the water inlet 101. When the water flows through the filter screen 711, the filter screen 711 will filter out large particles of impurities in the water, so that the large particles of impurities are blocked on the filter screen 711.

[0052] S2. The filtered water will flow to the outlet 102. A liquid pipe can be connected to the outlet 102 to transfer the filtered water to a designated location.

[0053] S3. After the filter device has been used for a certain period of time, large particles of impurities may accumulate on the filter screen 711. At this time, first connect the water source to the water pipe connector 605, and then start the second motor 715. The second motor 715 drives the transmission wheel 714 to rotate, and the rotating shaft 705 drives the annular plate 701 to rotate 180°. During the rotation, the cleaning brush 709 will clean the impurities on the inside of the circular fixed plate 2 and the sealing cover 9, and move the impurities together.

[0054] S4. After the annular plate 701 has rotated, start the first motor 610 to make the first motor 610 rotate, so that the water pipe connector 605 moves towards the circular fixed plate 2, so that the rotating sprayer 606 passes through the through hole 201, and then use the rotating sprayer 606 to clean the inside of the annular plate 701 and the filter screen 711, so that the impurities are transported to the discharge port 103 with the water flow.

[0055] S5. Water containing impurities will flow into sedimentation tank 11 through discharge port 103 and settle in sedimentation tank 11, causing impurities to settle at the bottom of sedimentation tank 11. At this time, relatively clean water can be collected from liquid outlet 1101 for water recycling, so that the filter screen of the filtration device does not need to be cleaned manually and water waste is reduced.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "setting," and "forming" should be interpreted broadly; for example, they can refer to fixed connections or settings, detachable connections or settings, or integrated structures; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components; those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] In the description of this invention, references to terms such as “embodiment,” “specific example,” or “practical application” indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment is included in at least one embodiment or example of the invention; the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any way. All technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A large particle impurity filtration device for water quality testing, comprising a housing (1), characterized in that: The outer shell (1) is provided with an inlet (101), and an outlet (102) is provided at the bottom of the inlet (101). A sludge discharge port (103) is provided near the outlet (102) on the outer shell (1). Several columns (104) are provided on any side of the outer shell (1). A filter structure (7) is provided inside the outer shell (1). Several fixing rings (8) are evenly distributed around the outer wall of the outer shell (1). The outer shell (1) is provided with... A support frame (3) is provided, the outer shell (1) is fixedly connected to the support frame (3), a support plate (4) is fixedly connected to the bottom surface of the support frame (3), and support legs (5) are fixedly connected to the four corners of the bottom surface of the support plate (4). A circular fixing plate (2) is fixedly connected to the side of the outer shell (1) away from several columns (104). A through hole (201) is provided on the circular fixing plate (2), and a cleaning mechanism (6) is provided on the side of the circular fixing plate (2) away from the outer shell (1). The cleaning mechanism (6) includes a square cover (601), which is fixedly connected to a circular fixing plate (2). A first sliding groove (602) is provided on the bottom inner surface of the square cover (601). A water pipe limiting bracket (604) is fixedly connected to the bottom inner surface of the square cover (601) away from the circular fixing plate (2) by bolts. A second sliding groove (608) is provided on the top surface of the first sliding groove (602). A first sliding rod (603) is provided in the first sliding groove (602). A water pipe connector (605) is fixedly connected to the top surface of the first sliding rod (603). A rotating sprayer (606) is installed on the side of the water pipe connector (605) near the circular fixed plate (2). A second sliding rod (607) is fixedly connected to the top surface of the water pipe connector (605). The second sliding rod (607) is provided in the second sliding groove (608). A moving plate (609) is fixedly connected to the top surface of the second sliding groove (608). A first motor (610) is installed on the top surface of the moving plate (609). A gear (611) is fixedly connected to the output shaft of the first motor (610). A rack (612) is fixedly connected to the top surface of the square cover (601) near the first motor (610). The rack (612) meshes with the gear (611).

2. The water quality testing large particle impurity filtration device according to claim 1, characterized in that, The filter structure (7) includes an annular plate (701), on which a first reserved hole (702) is symmetrically arranged, a second reserved hole (703) is symmetrically arranged, and a third reserved hole (704) is symmetrically arranged. A rotating shaft (705) is arranged at the center of the annular plate (701), and a connecting slot (706) is symmetrically arranged on the rotating shaft (705). A frame (710) is arranged in each of the two connecting slots (706), and a filter screen (711) is arranged in each of the two frames (710).

3. The water quality testing large particle impurity filtration device according to claim 2, characterized in that, A rotating shaft (705) is provided at the center of the annular plate (701). Baffles (707) are symmetrically arranged on the rotating shaft (705). The two baffles (707) are fixedly connected to the rotating shaft (705). The side of the two baffles (707) away from the rotating shaft (705) is fixedly connected to the annular plate (701). Connecting plates (708) are symmetrically arranged on the rotating shaft (705) near the two baffles (707). The two connecting plates (708) are fixedly connected to the rotating shaft (705). The end of the two connecting plates (708) away from the rotating shaft (705) is fixedly connected to the annular plate (701). Cleaning brushes (709) are provided on both sides of the two connecting plates (708).

4. The water quality testing large particle impurity filtration device according to claim 2, characterized in that, A connecting rod (713) is fixedly connected to one end of the rotating shaft (705) near the circular fixed plate (2). The connecting rod (713) passes through the circular fixed plate (2). A mounting plate (712) is provided at the bottom end of the connecting rod (713). The mounting plate (712) is fixedly connected to the support plate (4). Both the mounting plate (712) and the connecting rod (713) are provided with transmission wheels (714). The upper transmission wheel (714) is fixedly connected to the connecting rod (713). The lower transmission wheel (714) is rotatably connected to the mounting plate (712). A second motor (715) is provided on the side of the lower transmission wheel (714) away from the annular plate (701). The second motor (715) is installed on the top surface of the support plate (4). The lower transmission wheel (714) is fixedly connected to the output shaft of the second motor (715). The two transmission wheels (714) are connected by a transmission belt (716).

5. A large particle impurity filtration device for water quality testing according to claim 1, characterized in that, A sealing cover (9) is provided on the side of the outer shell (1) away from the circular fixing plate (2). A number of circular grooves (901) are provided on the side of the sealing cover (9) close to the outer shell (1). The size of the circular grooves (901) is the same as the size of the column (104). A number of mounting grooves (902) are provided on the outer wall of the sealing cover (9). An electromagnet (904) is installed in each mounting groove (902). A fixing column (903) is fixedly connected to the push-pull rod of each electromagnet (904).

6. The water quality testing large particle impurity filtration device according to claim 5, characterized in that: An auxiliary handle (10) is fixedly connected to the side of the sealing cover (9) away from the outer shell (1).

7. The water quality testing large particle impurity filtration device according to claim 1, characterized in that, The bottom of the discharge port (103) is provided with a sedimentation tank (11), and a liquid outlet (1101) is provided on any side of the sedimentation tank (11).

8. A filtration method for a large particulate impurity filtration device for water quality testing according to any one of claims 1-7, characterized in that, The specific steps include the following: S1. Water to be filtered is injected into the circular fixed plate (2) through the water inlet (101). When the water flows through the filter screen (711), the filter screen (711) will filter out large particles of impurities in the water, so that the large particles of impurities are blocked on the filter screen (711). S2. The filtered water will flow to the outlet (102). A liquid pipe can be connected to the outlet (102) to transfer the filtered water to the designated location. S3. After the filter device has been used for a certain period of time, large particles of impurities may accumulate on the filter screen (711). At this time, first connect the water source to the water pipe connector (605), and then start the second motor (715). The second motor (715) drives the transmission wheel (714) to rotate, and the rotating shaft (705) drives the ring plate (701) to rotate 180°. During the rotation, the cleaning brush (709) will clean the impurities on the inside of the circular fixed plate (2) and the sealing cover (9) and move the impurities together. S4. After the annular plate (701) has rotated, start the first motor (610) to make the first motor (610) rotate, so that the water pipe connector (605) moves towards the circular fixed plate (2) and the rotating sprayer (606) passes through the through hole (201). Then use the rotating sprayer (606) to clean the inside of the annular plate (701) and the filter screen (711), so that the impurities are transported to the discharge port (103) with the water flow. S5. Water containing impurities will flow into the sedimentation tank (11) through the discharge port (103) and settle in the sedimentation tank (11), causing the impurities to settle at the bottom of the sedimentation tank (11). At this time, relatively clean water can be collected from the liquid outlet (1101) and the water can be recycled, so that the filter screen of the filter device does not need to be cleaned manually and the waste of water resources is reduced.

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