Filtering device for drainage pipeline

Abstract

The invention relates to the technical field of drainage pipelines, and provides a filtering device for a drainage pipeline. The middle pipeline is installed at the end of the first pipeline, a second pipeline is installed at one end of the middle pipeline, a first flange plate is fixedly connected to the outer wall of the middle pipeline, and a second flange plate is fixedly connected to the outer wall of the first pipeline and the outer wall of the second pipeline; the auxiliary butt joint mechanism is located between the first flange plate and the second flange plate and used for assisting butt joint of the first pipeline and the middle pipeline; and the switching circulation device is positioned in the middle pipeline. By arranging the switching circulation device, after one conical filter cartridge in the middle pipeline is blocked, the other conical filter cartridge can be actively switched for use, so that the equipment can be continuously used, the use smoothness of the equipment is ensured, and the overall practicability of the equipment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of drainage pipes, and in particular to a filtering device for drainage pipes. Background Art

[0002] When existing pipes are used to discharge sewage or circulate liquids with impurities, it is easy for impurities to flow into valves, pumps and other equipment, causing blockage. At the same time, excessive impurities accumulated inside can also easily cause blockage, requiring staff to regularly dismantle it for unblocking, thus affecting its use. For this reason, we provide a filter device for drainage pipes to solve the above problems. Summary of the invention

[0003] The present invention provides a filtering device for a drainage pipe, which solves the problem in the related art that the drainage pipe is easily blocked during use.

[0004] The technical solution of the present invention is as follows: a filtering device for a drainage pipe, comprising: a first pipe and an intermediate pipe installed at the end of the first pipe, a second pipe installed at one end of the intermediate pipe, a first flange fixedly connected to the outer wall of the intermediate pipe, and a second flange fixedly connected to the outer wall of the first pipe and the second pipe; an auxiliary docking mechanism, located between the first flange and the second flange, for assisting the first pipe to dock with the intermediate pipe; a switching flow device, located inside the intermediate pipe, for switching and discharging water flowing inside the intermediate pipe, the switching flow device comprising a baffle fixedly connected to the inside of the intermediate pipe, an auxiliary pipe fixedly connected to the drainage port of the intermediate pipe, a conical filter cartridge placed inside the auxiliary pipe, a return pipe fixedly connected to the drainage port of the auxiliary pipe, one end of the return pipe extending to the water inlet of the intermediate pipe and located on the back of the baffle, and auxiliary discharge members for discharging material from the inside of the conical filter cartridge are provided at both ends of the auxiliary pipe; The switching flow device also includes a fixing seat fixedly connected to one side of the auxiliary pipeline, a driving motor is installed on the inner side of the fixing seat, the output end of the driving motor is connected to a one-way threaded screw, and one end of the one-way threaded screw penetrates into the interior of the intermediate pipeline and is rotatably connected to the intermediate pipeline, the outer wall of the one-way threaded screw is threadedly connected to a slider, one end of the slider is fixedly connected to a power plate, the inner side of the power plate is fixedly connected to a sliding rod, the outer wall of the sliding rod is slidably connected to a first sealing plate, a first auxiliary spring is installed between the power plate and the first sealing plate, and a sealing component is provided on the inner side of the partition plate for cooperating with the switching flow device to seal one end of the return pipeline.

[0005] As a further solution of the present invention: two sliders are provided, and the two sliders are respectively installed on the outer wall of the one-way threaded screw, and the inner side of the partition is provided with a limiting sliding groove matching the two sliders.

[0006] As a further solution of the present invention: the sealing assembly includes a piston rod slidably connected to the inner side of the partition, the bottom of the piston rod passes through the bottom of the partition and is fixedly connected to a second sealing plate, the top of the second sealing plate is fixedly connected to a second auxiliary spring, and one end of the second auxiliary spring is fixedly connected to the partition, the top of the piston rod is fixedly connected to a first spherical rod, the bottom of the power plate is fixedly connected to a rectangular plate, and one end of the rectangular plate is fixedly connected to an inclined plate.

[0007] As a further solution of the present invention: the auxiliary discharge member includes a piston block fixedly connected to one end of the conical filter cartridge, and the piston block is installed inside the auxiliary pipe, a connecting spring is installed between the piston block and the auxiliary pipe, a first discharge port that penetrates to the outside is opened inside the auxiliary pipe, a second discharge port that communicates with the outside is opened inside the conical filter cartridge, and a swing dredging component for stirring the inside of the conical filter cartridge is provided on the inner side of the first sealing plate.

[0008] As a further solution of the present invention: the auxiliary discharge member also includes a groove opened on the inner side of the conical filter cartridge, the inner side of the conical filter cartridge is provided with a pin hole penetrating into the interior of the auxiliary pipe, and the pin hole is communicated with the groove, the inner side of the pin hole is slidably connected with a pin, one end of the pin is fixedly connected to a cylinder, an inclined groove is opened on the inner side of the cylinder, a power spring is fixedly connected to the top of the cylinder, and one end of the power spring is fixedly connected to the conical filter cartridge, and a second spherical rod is fixedly connected to the inner side of the first sealing plate.

[0009] As a further solution of the present invention: the swing dredging assembly includes a sealing box fixedly connected to the inner side of the first sealing plate, an L-shaped swing block is arranged on the inner side of the sealing box, the outer walls on both sides of the L-shaped swing block are fixedly connected with a rotating shaft, and one end of the rotating shaft passes through the interior of the sealing box and is rotatably connected to the sealing box, the outer wall of the rotating shaft is fixedly connected with a second connecting plate, the inner side of the sealing box is fixedly connected with a first connecting plate, and an arc spring is installed between the first connecting plate and the second connecting plate.

[0010] As a further solution of the present invention: the swing dredging assembly also includes a power push rod fixedly connected to the inner side of the power plate, and multiple groups of rectangular blocks are fixedly connected to the bottom of the power push rod. The multiple groups of rectangular blocks are equidistantly distributed at the bottom of the power push rod, and each group of rectangular blocks is provided with two, and the distance between the two rectangular blocks is greater than the width of the arc spring.

[0011] As a further solution of the present invention: the auxiliary docking mechanism includes a plurality of second flange holes opened on the inner side of the second flange plate, wherein four of the second flange holes are internally threadedly connected with auxiliary pins, one end of the auxiliary pins is set to be spherical, a plurality of first flange holes are opened on the inner side of the first flange plate, and one end of the first flange plate is opened with four conical holes respectively connected to one of the first flange holes.

[0012] The working principle and beneficial effects of the present invention are: 1. By setting a switching flow device, when a conical filter cartridge inside the middle pipe is blocked, another conical filter cartridge can be actively switched for use, so that the equipment can be used continuously, ensuring the smooth use of the equipment, thereby improving the overall practicality of the device; 2. By setting up a plugging assembly, when a power plate drives a first sealing plate to block the auxiliary pipe port, it drives the inclined plate to move synchronously. When the inclined plate contacts the first spherical rod, the first spherical rod is pushed to drive the piston rod downward under the action of the inner inclined surface of the inclined plate. When the inclined plate is separated from the first spherical rod so that the rectangular plate fits on the top of the first spherical rod, the second sealing plate blocks the port of the return pipe, thereby preventing the filtered water from flowing back into the blocked auxiliary pipe when water flows inside the other return pipe, thereby ensuring the stability of the equipment operation; 3. By setting an auxiliary discharge piece, the output end of the driving motor continues to drive the one-way threaded screw to rotate forward to drive the power plate to move toward the auxiliary pipe. Since the first sealing plate has been against the outer wall of the auxiliary pipe, the sliding rod can push the conical filter cartridge to squeeze the connecting spring to move toward the first discharge port. When the second discharge port moves to the position of the first discharge port, the dirt inside the conical filter cartridge can slide into the external collection bucket through the second discharge port and the first discharge port, so that the dirt inside the conical filter cartridge can be automatically discharged, and the staff cannot manually disassemble and clean it, thereby improving the overall practicality of the device.

[0013] 4. By arranging the cooperation of the second spherical rod and other parts, when the first sealing plate moves toward the auxiliary pipeline to be blocked, the second spherical rod is driven to move synchronously. When the second spherical rod contacts the inclined groove, the cylinder is pushed down under the action of the inner inclined surface of the inclined groove to drive the inner side of the latch groove to move. When the first sealing plate is blocked on the auxiliary pipeline, the latch moves out from the inside of the latch hole, thereby releasing the connection between the conical filter cartridge and the auxiliary pipeline. The above steps are reversed to fix the conical filter cartridge to the auxiliary pipeline, so that the conical filter cartridge can filter stably during placement, avoiding shaking of the conical filter cartridge during use, thereby improving the overall practicality of the device. 5. By setting the cooperation of parts such as the arc spring, when the first sealing plate is sealed at the auxiliary pipe port, the power plate continues to move, thereby driving the rectangular block to move toward the second connecting plate through the power push rod. When the rectangular block contacts the second connecting plate, the second connecting plate is pushed to drive the L-shaped swing block to rotate through the rotating shaft, so that the arc spring is compressed. When the rectangular block is separated from the second connecting plate, the arc spring can push the L-shaped swing block to reset. In this reciprocating manner, the L-shaped swing block can disturb the inside of the conical filter cartridge, and then the sewage and dirt inside the conical filter cartridge can be conveniently discharged from the inside of the second discharge port under the disturbance of the L-shaped swing block, thereby improving the stability of dirt discharge.

[0014] 6. By setting up an auxiliary docking mechanism, when the second pipe needs to be docked with the intermediate pipe after being disassembled, the auxiliary pin can be threadedly connected to the inside of a second flange hole aligned with the tapered hole. Subsequently, during the process of docking the second pipe with the intermediate pipe, the spherical surface of one end of the auxiliary pin contacts the tapered hole. Under the action of the tapered hole, the auxiliary pin can slide toward the center position of the first flange hole, so that the tapered hole can start to guide the second pipe during docking. At the same time, after the auxiliary pin is docked and inserted into the inside of the first flange hole, the auxiliary pin can play a role of suspending the second pipe, so that the staff can fix the second flange plate to the first flange plate by bolts. The function of assisting the docking of the second pipe with the intermediate pipe is realized through the cooperation of the above multiple parts, without the need for the staff to adjust the docking position multiple times, thereby improving the overall practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the second pipeline and the intermediate pipeline of the present invention being connected; Figure 3It is a cross-sectional view of the intermediate pipeline and the auxiliary pipeline of the present invention; Figure 4 It is a schematic diagram of the inner structure of the partition of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle; Figure 7 It is a schematic structural diagram of the second sealing plate of the present invention; Figure 8 It is a schematic diagram of the inner structure of the piston block of the present invention; Fig. 9 For the present invention Figure 8 Enlarged view of center C.

[0017] In the figure: 1, first pipeline; 2, second pipeline; 3, intermediate pipeline; 4, auxiliary pin; 5, first flange; 6, second flange; 7, auxiliary pipeline; 8, fixed seat; 9, driving motor; 10, one-way threaded screw; 11, rectangular block; 12, first flange hole; 13, tapered hole; 14, second flange hole; 15, return pipeline; 16, partition; 17, piston block; 18, connecting spring; 19, tapered filter cartridge; 20, first sealing plate; 21, power plate; 22, first discharge port; 23, second discharge port; 2 4. L-shaped swing block; 25. Slide bar; 26. First auxiliary spring; 27. Sliding block; 28. Limiting slide groove; 29. ​​Power push rod; 30. Rectangular plate; 31. Piston rod; 32. First spherical rod; 33. Inclined plate; 34. Sealing box; 35. Groove; 36. Pin hole; 37. Pin; 38. Cylinder; 39. Second spherical rod; 40. Inclined groove; 41. Power spring; 42. Second sealing plate; 43. Second auxiliary spring; 44. Rotating shaft; 45. First connecting plate; 46. Second connecting plate; 47. Arc spring. DETAILED DESCRIPTION

[0018] The following will be combined with 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. Example 1

[0019] See also Figures 1 to 9The present embodiment provides a filtering device for a drainage pipe, comprising: a first pipe 1 and an intermediate pipe 3 installed at the end of the first pipe 1, a second pipe 2 is installed at one end of the intermediate pipe 3, a first flange 5 is fixedly connected to the outer wall of the intermediate pipe 3, a second flange 6 is fixedly connected to the outer walls of the first pipe 1 and the second pipe 2, a switching flow device is located inside the intermediate pipe 3, and is used to switch and discharge the water flowing inside the intermediate pipe 3, the switching flow device comprises a baffle 16 fixedly connected to the inside of the intermediate pipe 3, an auxiliary pipe 7 is fixedly connected to the drainage port of the intermediate pipe 3, a conical filter cartridge 19 is placed inside the auxiliary pipe 7, a return pipe 15 is fixedly connected to the drainage port of the auxiliary pipe 7, one end of the return pipe 15 extends to the water inlet of the intermediate pipe 3 and is located on the back of the baffle 16, the switching flow device also comprises a fixing seat 8 fixedly connected to one side of the auxiliary pipe 7, a driving motor 9 is installed on the inner side of the fixing seat 8, a one-way threaded screw 10 is connected to the output end of the driving motor 9, and one end of the one-way threaded screw 10 penetrates into the interior of the intermediate pipe 3 and is rotatably connected to the intermediate pipe 3 The outer wall of the one-way threaded screw 10 is threadedly connected with a slider 27, one end of the slider 27 is fixedly connected with a power plate 21, the inner side of the power plate 21 is fixedly connected with a slider 25, the outer wall of the slider 25 is slidably connected with a first sealing plate 20, a first auxiliary spring 26 is installed between the power plate 21 and the first sealing plate 20, and a blocking component for cooperating with a switching flow device to block one end of the return pipe 15 is provided on the inner side of the partition 16. Two sliders 27 are provided, and the two sliders 27 are respectively installed on the outer wall of the one-way threaded screw 10, and the inner side of the partition 16 is provided with a first auxiliary spring 26. A limiting slide groove 28 matching the two sliders 27 is opened on the side, and the blocking assembly includes a piston rod 31 slidably connected to the inner side of the partition 16, the bottom of the piston rod 31 passes through the bottom of the partition 16 and is fixedly connected to a second sealing plate 42, the top of the second sealing plate 42 is fixedly connected to a second auxiliary spring 43, and one end of the second auxiliary spring 43 is fixedly connected to the partition 16, the top of the piston rod 31 is fixedly connected to a first spherical rod 32, the bottom of the power plate 21 is fixedly connected to a rectangular plate 30, and one end of the rectangular plate 30 is fixedly connected to an inclined plate 33; A flow sensor can be installed at the water outlet of the return pipe 15, and the flow sensor can be used to detect the rate of water flowing out of the return pipe 15. First, after the water in the first pipe 1 enters the middle pipe 3, it is filtered through an opened conical filter cartridge 19 and flows into the return pipe 15, and then flows into the second pipe 2. When the conical filter cartridge 19 is clogged after long-term use, the flow sensor detects that the water flow rate of the return pipe 15 is reduced, and the flow sensor generates an electrical signal to the PLC controller, which controls the drive motor 9 to start, and the output end of the drive motor 9 drives the one-way threaded screw 10 to move forward, thereby driving the two sliders 27 to drive a power The plate 21 drives a first sealing plate 20 to move laterally, so that a first sealing plate 20 moves toward the conical filter cartridge 19 where the filter cartridge 19 is blocked, and another first sealing plate 20 moves away from the conical filter cartridge 19 where the filter cartridge 19 is not blocked. When a first sealing plate 20 is blocked at the end of the auxiliary pipe 7, the blocked conical filter cartridge 19 cannot be used, so that the other conical filter cartridge 19 can continue to be used. In this way, after a conical filter cartridge 19 in the intermediate pipe 3 is blocked, another conical filter cartridge 19 can be actively switched for use, so that the equipment can be used continuously, ensuring the smoothness of the equipment, thereby improving the overall practicality of the device; When a power plate 21 drives a first sealing plate 20 to seal the port of the auxiliary pipe 7, it drives the inclined plate 33 to move synchronously. When the inclined plate 33 contacts the first spherical rod 32, the first spherical rod 32 is pushed to drive the piston rod 31 to move downward under the action of the inner inclined surface of the inclined plate 33. When the inclined plate 33 separates from the first spherical rod 32 so that the rectangular plate 30 fits on the top of the first spherical rod 32, the second sealing plate 42 blocks the port of the return pipe 15, thereby preventing the filtered water from flowing back into the blocked auxiliary pipe 7 when water flows inside the other return pipe 15, thereby ensuring the stability of the equipment operation. Example 2

[0020] Both ends of the auxiliary pipe 7 are provided with auxiliary discharge parts for discharging materials from the inside of the conical filter cartridge 19, the auxiliary discharge parts include a piston block 17 fixedly connected to one end of the conical filter cartridge 19, and the piston block 17 is installed inside the auxiliary pipe 7, a connecting spring 18 is installed between the piston block 17 and the auxiliary pipe 7, a first discharge port 22 penetrating to the outside is opened inside the auxiliary pipe 7, a second discharge port 23 communicating with the outside is opened inside the conical filter cartridge 19, and the auxiliary discharge parts also include a first discharge port 22 opened inside the conical filter cartridge A groove 35 is formed inside the conical filter cartridge 19, a latch hole 36 is formed inside the conical filter cartridge 19 and penetrates into the auxiliary pipe 7, and the latch hole 36 is communicated with the groove 35, a latch 37 is slidably connected inside the latch hole 36, one end of the latch 37 is fixedly connected to a cylinder 38, an inclined groove 40 is formed inside the cylinder 38, a power spring 41 is fixedly connected to the top of the cylinder 38, and one end of the power spring 41 is fixedly connected to the conical filter cartridge 19, and a second spherical rod 39 is fixedly connected to the inner side of the first sealing plate 20; When it is necessary to discharge the dirt inside the clogged conical filter cartridge 19, the staff can place the collection bucket below the first discharge port 22 in advance, and then start the drive motor 9 again. The output end of the drive motor 9 continues to drive the one-way threaded screw 10 to rotate forward to drive the power plate 21 to move toward the auxiliary pipe 7. Since the first sealing plate 20 has been against the outer wall of the auxiliary pipe 7, the slide bar 25 can push the conical filter cartridge 19 to squeeze the connecting spring 18 to move toward the first discharge port 22. When the second discharge port 23 moves to the position of the first discharge port 22, the dirt inside the conical filter cartridge 19 can slide into the external collection bucket through the second discharge port 23 and the first discharge port 22, so that the dirt inside the conical filter cartridge 19 can be automatically discharged, and the staff cannot manually disassemble and clean it, thereby improving the overall practicality of the device. When the first sealing plate 20 moves toward the auxiliary pipe 7 that needs to be blocked, it drives the second spherical rod 39 to move synchronously. When the second spherical rod 39 contacts the inclined groove 40, the cylinder 38 is pushed by the inner inclined surface of the inclined groove 40 to drive the inner side of the groove 35 of the latch 37 to move. When the first sealing plate 20 is blocked on the auxiliary pipe 7, the latch 37 is removed from the inside of the latch hole 36, thereby releasing the connection between the conical filter cartridge 19 and the auxiliary pipe 7. Reversing the above steps can fix the conical filter cartridge 19 to the auxiliary pipe 7, so that the conical filter cartridge 19 can filter stably during placement, avoiding shaking of the conical filter cartridge 19 during use, thereby improving the overall practicality of the device. Example 3

[0021] The inner side of the first sealing plate 20 is provided with a swing dredging assembly for stirring the inside of the conical filter cartridge 19, and the swing dredging assembly includes a sealing box 34 fixedly connected to the inner side of the first sealing plate 20, and an L-shaped swing block 24 is provided on the inner side of the sealing box 34. The outer walls of both sides of the L-shaped swing block 24 are fixedly connected with a rotating shaft 44, and one end of the rotating shaft 44 penetrates into the interior of the sealing box 34 and is rotatably connected to the sealing box 34. The outer wall of the rotating shaft 44 is fixedly connected with a second connecting plate 46, and the inner side of the sealing box 34 is fixedly connected with a first connecting plate 45, and an arc spring 47 is installed between the first connecting plate 45 and the second connecting plate 46. The swing dredging assembly also includes a power push rod 29 fixedly connected to the inner side of the power plate 21, and the bottom of the power push rod 29 is fixedly connected with a plurality of groups of rectangular blocks 11, and the plurality of groups of rectangular blocks 11 are equidistantly distributed at the bottom of the power push rod 29, and each group of rectangular blocks 11 is provided with two, and the distance between the two rectangular blocks 11 is greater than the width of the arc spring 47; When the first sealing plate 20 is blocked at the port of the auxiliary pipe 7, the power plate 21 continues to move, thereby driving the rectangular block 11 to move toward the second connecting plate 46 through the power push rod 29. When the rectangular block 11 contacts the second connecting plate 46, the second connecting plate 46 is pushed to drive the L-shaped swing block 24 to rotate through the rotating shaft 44, so that the arc spring 47 is compressed. When the rectangular block 11 is separated from the second connecting plate 46, the arc spring 47 can push the L-shaped swing block 24 to reset, so that the L-shaped swing block 24 can be disturbed inside the conical filter cartridge 19 in this reciprocating motion, so that the sewage and dirt inside the conical filter cartridge 19 can be conveniently discharged from the second discharge port 23 under the disturbance of the L-shaped swing block 24, thereby improving the stability of dirt discharge. Example 4

[0022] The auxiliary docking mechanism is located between the first flange 5 and the second flange 6, and is used to assist the first pipe 1 in docking with the intermediate pipe 3. The auxiliary docking mechanism includes a plurality of second flange holes 14 provided on the inner side of the second flange 6, wherein four of the second flange holes 14 are internally threadedly connected with auxiliary pins 4, and one end of the auxiliary pin 4 is set to be spherical. A plurality of first flange holes 12 are provided on the inner side of the first flange 5, and four tapered holes 13 are provided on one end of the first flange 5, each of which is communicated with one of the first flange holes 12; When the second pipe 2 needs to be docked with the intermediate pipe 3 after being disassembled, the auxiliary pin 4 can be threadedly connected to a second flange hole 14 aligned with the tapered hole 13. Subsequently, during the docking process of the second pipe 2 and the intermediate pipe 3, the spherical surface of one end of the auxiliary pin 4 contacts the tapered hole 13. Under the action of the tapered hole 13, the auxiliary pin 4 can slide toward the center position of the first flange hole 12, so that the tapered hole 13 can start to guide the second pipe 2 during the docking process. At the same time, after the auxiliary pin 4 is docked and inserted into the first flange hole 12, the auxiliary pin 4 can play the role of suspending the second pipe 2, so that the staff can fix the second flange 6 and the first flange 5 by bolts. The function of assisting the second pipe 2 to dock with the intermediate pipe 3 is realized through the cooperation of the above multiple parts, without the need for the staff to adjust the docking position multiple times, thereby improving the overall practicality of the device.

[0023] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A filter device for a drainage pipe, characterized in that: include: A first pipeline (1) and an intermediate pipeline (3) installed at an end of the first pipeline (1), a second pipeline (2) being installed at one end of the intermediate pipeline (3), a first flange (5) being fixedly connected to the outer wall of the intermediate pipeline (3), and a second flange (6) being fixedly connected to the outer walls of the first pipeline (1) and the second pipeline (2); an auxiliary docking mechanism, located between the first flange (5) and the second flange (6), and used to assist the first pipe (1) in docking with the intermediate pipe (3); a switching flow device, located inside the intermediate pipe (3), and used for switching and discharging water circulating inside the intermediate pipe (3); the switching flow device comprises a baffle (16) fixedly connected to the inside of the intermediate pipe (3); an auxiliary pipe (7) is fixedly connected to the drainage port of the intermediate pipe (3); a conical filter cartridge (19) is placed inside the auxiliary pipe (7); a return pipe (15) is fixedly connected to the drainage port of the auxiliary pipe (7); one end of the return pipe (15) extends to the water inlet of the intermediate pipe (3) and is located on the back side of the baffle (16); and auxiliary discharge parts for discharging the inside of the conical filter cartridge (19) are provided at both ends of the auxiliary pipe (7); The switching flow device further comprises a fixing seat (8) fixedly connected to one side of the auxiliary pipe (7), a driving motor (9) being installed on the inner side of the fixing seat (8), an output end of the driving motor (9) being connected to a one-way threaded screw (10), and one end of the one-way threaded screw (10) passing through the interior of the intermediate pipe (3) and being rotatably connected to the intermediate pipe (3), an outer wall of the one-way threaded screw (10) being threadedly connected to a slider (27), one end of the slider (27) being fixedly connected to a power plate (21), an inner side of the power plate (21) being fixedly connected to a slide bar (25), an outer wall of the slide bar (25) being slidably connected to a first sealing plate (20), a first auxiliary spring (26) being installed between the power plate (21) and the first sealing plate (20), and an inner side of the partition plate (16) being provided with a blocking component for cooperating with the switching flow device to block one end of the return pipe (15).

2. A filter device for a drainage pipe according to claim 1, characterized in that: Two sliders (27) are provided, and the two sliders (27) are respectively mounted on the outer wall of the one-way threaded screw (10), and a limiting sliding groove (28) matching the two sliders (27) is provided on the inner side of the partition plate (16).

3. A filter device for a drainage pipe according to claim 1, characterized in that: The blocking assembly comprises a piston rod (31) slidably connected to the inner side of the partition (16); the bottom of the piston rod (31) passes through the bottom of the partition (16) and is fixedly connected to a second sealing plate (42); the top of the second sealing plate (42) is fixedly connected to a second auxiliary spring (43), and one end of the second auxiliary spring (43) is fixedly connected to the partition (16); the top of the piston rod (31) is fixedly connected to a first spherical rod (32); the bottom of the power plate (21) is fixedly connected to a rectangular plate (30), and one end of the rectangular plate (30) is fixedly connected to an inclined plate (33).

4. A filter device for a drainage pipe according to claim 1, characterized in that: The auxiliary discharge member comprises a piston block (17) fixedly connected to one end of the conical filter cartridge (19), and the piston block (17) is installed inside the auxiliary pipe (7), a connecting spring (18) is installed between the piston block (17) and the auxiliary pipe (7), a first discharge port (22) penetrating to the outside is provided inside the auxiliary pipe (7), a second discharge port (23) communicating with the outside is provided inside the conical filter cartridge (19), and a swing dredging component for stirring the inside of the conical filter cartridge (19) is provided on the inner side of the first sealing plate (20).

5. A filter device for a drainage pipe according to claim 2, characterized in that: The auxiliary discharge member further comprises a groove (35) formed on the inner side of the conical filter cartridge (19); a latch hole (36) penetrating into the interior of the auxiliary pipe (7) is formed on the inner side of the conical filter cartridge (19); the latch hole (36) is communicated with the groove (35); a latch (37) is slidably connected to the inner side of the latch hole (36); one end of the latch (37) is fixedly connected to a cylinder (38); an inclined groove (40) is formed on the inner side of the cylinder (38); a power spring (41) is fixedly connected to the top of the cylinder (38); one end of the power spring (41) is fixedly connected to the conical filter cartridge (19); and a second spherical rod (39) is fixedly connected to the inner side of the first sealing plate (20).

6. A filter device for a drainage pipe according to claim 4, characterized in that: The swing dredging assembly comprises a sealing box (34) fixedly connected to the inner side of the first sealing plate (20), an L-shaped swing block (24) is arranged on the inner side of the sealing box (34), a rotating shaft (44) is fixedly connected to the outer walls on both sides of the L-shaped swing block (24), and one end of the rotating shaft (44) passes through the interior of the sealing box (34) and is rotatably connected to the sealing box (34), a second connecting plate (46) is fixedly connected to the outer wall of the rotating shaft (44), a first connecting plate (45) is fixedly connected to the inner side of the sealing box (34), and an arc spring (47) is installed between the first connecting plate (45) and the second connecting plate (46).

7. A filter device for a drainage pipe according to claim 6, characterized in that: The swing dredging component also includes a power push rod (29) fixedly connected to the inner side of the power plate (21), and a plurality of groups of rectangular blocks (11) are fixedly connected to the bottom of the power push rod (29), and the plurality of groups of rectangular blocks (11) are distributed at equal distances at the bottom of the power push rod (29), and each group of rectangular blocks (11) is provided with two, and the distance between the two rectangular blocks (11) is greater than the width of the arc spring (47).

8. A filter device for a drainage pipe according to claim 1, characterized in that: The auxiliary docking mechanism comprises a plurality of second flange holes (14) formed on the inner side of the second flange plate (6), wherein four of the second flange holes (14) are internally threadedly connected with auxiliary pins (4), one end of the auxiliary pins (4) being configured in a spherical shape, a plurality of first flange holes (12) formed on the inner side of the first flange plate (5), and four tapered holes (13) respectively communicating with one of the first flange holes (12) formed on one end of the first flange plate (5).

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