Anti-clogging device for building water supply and drainage and anti-clogging method thereof

Abstract

The application discloses a kind of for building water supply and sewerage anti-blocking device and its anti-blocking method for water supply and sewerage, including drain pipe, and drain pipe is connected with sewage pipe;Filter screen and sealing plate are arranged in drain pipe;Filter screen and sealing plate are slidably connected with drain pipe, and filter screen is attached to sealing plate;Sealing plate is located at the butt joint position with sewage pipe and drain pipe;Detection mechanism is arranged in drain pipe, and detection mechanism is used to detect whether filter screen is blocked;Sewage mechanism is arranged in drain pipe, and sewage mechanism is used to automatically discharge the blockage on filter screen into sewage pipe after detection mechanism detects that filter screen is blocked;The device is simple in structure, easy to use, can automatically detect and automatically clean up the blockage after drain pipe is blocked, can ensure the unobstructedness of drain pipe in the first time, and can ensure that drain pipe keeps continuous work.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water supply and drainage, in particular to a device for preventing blockage of building water supply and drainage and a method for preventing blockage thereof. BACKGROUND

[0002] The drainage pipe in the building water supply and drainage pipeline may be blocked, and the blocked position is usually at the bend of the pipeline. When the pipeline is blocked, the drainage needs to be stopped, and the blockage needs to be manually cleaned.

[0003] Manual cleaning of the blockage is complicated, time-consuming and labor-intensive. In addition, since the drainage pipeline is long, it is difficult to determine the specific blocked position, and a long time is spent on inspection. During the time when the drainage pipe is blocked, the drainage pipe cannot work, thus causing inconvenience to people for a long time. SUMMARY

[0004] The present application aims to provide a device for preventing blockage of building water supply and drainage and a method for preventing blockage thereof, to solve the problem of the existing drainage pipe being blocked, which requires manual determination of the blocked position and manual cleaning, which is time-consuming, labor-intensive and low in efficiency.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a device for preventing blockage of building water supply and drainage and a method for preventing blockage thereof, comprising a drainage pipe, the drainage pipe is connected to a sewage pipe; a filter screen and a sealing plate are arranged in the drainage pipe; the filter screen and the sealing plate are both in sliding connection with the drainage pipe, and the filter screen is attached to the sealing plate; the sealing plate is located at the joint position of the sewage pipe and the drainage pipe; a detection mechanism is arranged in the drainage pipe, the detection mechanism is used to detect whether the filter screen is blocked; a sewage discharge mechanism is arranged in the drainage pipe, the sewage discharge mechanism is used to automatically discharge the blockage on the filter screen into the sewage pipe after the detection mechanism detects that the filter screen is blocked.

[0006] The detection mechanism comprises a sliding rod, the sliding rod is fixedly connected with the filter screen and in sliding connection with the drainage pipe; the filter screen is in sliding attachment with the inner wall of the drainage pipe, and the filter screen is in a right-low and left-high state; pull ropes are fixedly connected to the left and right sides of the bottom end of the sliding rod in a symmetrical manner; a counterweight ring is arranged on the outer surface of the drainage pipe, the counterweight ring is in sliding connection with the drainage pipe; the other end of the pull rope penetrates the drainage pipe and is fixedly connected with the counterweight ring.

[0007] The pull rope is in gap cooperation with the drainage pipe; the part of the pull rope penetrating the drainage pipe is in an inclined shape, the height of the part of the pull rope penetrating the drainage pipe near the inner side of the drainage pipe is lower than the height of the part of the pull rope near the outer side of the drainage pipe; guide wheels are rotationally connected to the positions of the pull rope near the inner side and the outer side of the drainage pipe, the guide wheels are in rolling cooperation with the pull rope.

[0008] The sewage mechanism comprises a fixing frame, the fixing frame is fixedly connected with the drain pipe, and the fixing frame is slidably connected with the sliding rod; a connecting frame is fixedly connected to the bottom of the sealing plate, the connecting frame is slidably connected with the fixing frame; a lock catch mechanism is arranged on the fixing frame, and the lock catch mechanism is used to loosen the connecting frame from the uppermost position of the fixing frame after the detection mechanism detects that the filter screen is blocked.

[0009] The lock catch mechanism comprises two connecting plates, the two connecting plates are symmetrically arranged on the front and rear sides of the fixing frame, and the two connecting plates are fixedly connected with the fixing frame; first clamping blocks are symmetrically and slidably connected to the left and right sides of the connecting plates, first springs are arranged on the first clamping blocks, one end of each first spring is fixedly connected with the first clamping block, and the other end of each first spring is fixedly connected with the connecting plate; the first clamping blocks are in clamping cooperation with the connecting frame; a first trigger mechanism is arranged on the sliding rod, and the first trigger mechanism is used to trigger the first clamping blocks to slide on the connecting plates when the sliding rod slides to the bottommost position.

[0010] The first trigger mechanism comprises four first driving rods, the four first driving rods are respectively fixedly connected with the four first clamping blocks; four first extrusion rods are arranged above the four first driving rods respectively, and the four first extrusion rods are fixedly connected with the sliding rod.

[0011] Second clamping blocks are symmetrically and slidably connected to the front and rear sides of the outer surface of the drain pipe, second springs are arranged on the second clamping blocks, one end of each second spring is fixedly connected with the second clamping block, and the other end of each second spring is fixedly connected with the drain pipe; a second trigger mechanism is arranged on the sewage pipe, and the second trigger mechanism is used to drive the second clamping blocks to slide on the drain pipe after the blockage enters the sewage pipe.

[0012] The second trigger mechanism comprises a sliding plate, the sliding plate is arranged in the sewage pipe and is in sealing and sliding connection with the inner wall of the sewage pipe; connecting rods are fixedly connected to the front and rear sides of the sliding plate, second extrusion rods are fixedly connected to the end portions of the connecting rods, second driving rods are arranged below the second extrusion rods respectively, and the second driving rods are respectively fixedly connected with the second clamping blocks on the front and rear sides; the connecting rods are in sliding connection with the sewage pipe, and third springs are arranged on the connecting rods, one end of each third spring is fixedly connected with the connecting rod, and the other end of each third spring is fixedly connected with the sewage pipe.

[0013] A sealing door is arranged on the right side of the sewage pipe, and the sealing door is hingedly arranged on the sewage pipe.

[0014] A method for preventing blockage of a building water supply and drainage system is provided, and the specific steps of the method are as follows:

[0015] Step 1: When the blockage in the drain pipe blocks the filter screen, the detection mechanism detects that the filter screen is blocked.

[0016] Step two: the detection mechanism drives the sewage mechanism to operate, and the sewage mechanism drives the sealing plate to move away from the position of blocking the sewage pipe;

[0017] Step three: the blockage on the filter screen directly enters the sewage pipe, and the blockage in the drain pipe is cleaned;

[0018] Step four: after the blockage in the drain pipe completely enters the sewage pipe, the sealing plate and the filter screen are reset.

[0019] Compared with the prior art, the beneficial effects of the present application are:

[0020] The detection mechanism can detect that the filter screen is blocked, the detection mechanism drives the sewage mechanism to operate, and the sewage mechanism can slide the original sealing plate blocking the sewage pipe to another position, at which time the sewage pipe is no longer blocked, and the blockage on the filter screen directly enters the sewage pipe. When the blockage enters the sewage pipe, the filter screen is restored to be unobstructed, the filter screen and the sealing plate are reset, and the drain pipe is restored to normal drainage; the device is simple in structure and convenient to use, can automatically detect and clean the blockage after the drain pipe is blocked, can ensure the unobstructedness of the drain pipe in the first time, and can ensure the continuous operation of the drain pipe.

[0021] The second clamping block can clamp the counterweight ring when the counterweight ring moves to the uppermost position, at which time the filter screen and the sealing plate are kept at the bottommost position, and the blockage on the filter screen continuously falls into the sewage pipe, so that the blockage in the drain pipe can be more completely cleaned; when the blockage on the filter screen completely falls into the sewage pipe, the sliding plate in the sewage pipe is pressed downwardly to move under the weight of the blockage, the sliding plate moves downwardly to drive the connecting rods on the front and rear sides to move downwardly, the connecting rods drive the second extrusion rod to move downwardly, and when the second extrusion rod moves to the bottommost position, the second extrusion rod drives the second clamping blocks on the front and rear sides to move forward and backward, respectively, through extruding the second drive rod; the second clamping blocks on the front and rear sides move to disengage from the counterweight ring, and when the second clamping blocks disengage from the counterweight ring, the counterweight ring can move downwardly and pull the filter screen upwardly through the pull rope. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The method flowchart of the present application;

[0023] Figure 2 The overall structure schematic diagram of the present application;

[0024] Figure 3 The rear view structure schematic diagram of the present application;

[0025] Figure 4 It is a sectional view structure schematic diagram of the present application;

[0026] Figure 5 It is a second perspective view structure schematic diagram of the sectional view of the present application;

[0027] Figure 6 It is Figure 5 An enlarged structure schematic diagram of A in the middle;

[0028] Figure 7 It is a split structure schematic diagram in the present application;

[0029] Figure 8 It is a structure schematic diagram of the detection mechanism in the present application;

[0030] Figure 9 It is a structure schematic diagram of the pollution discharge mechanism in the present application;

[0031] Figure 10 It is Figure 9 An enlarged structure schematic diagram of B in the middle.

[0032] In the drawings, the components represented by each reference numeral are listed as follows:

[0033] 1, drain pipe; 2, pollution discharge pipe; 3, filter screen; 4, sealing plate; 5, sliding rod; 6, pull rope; 7, counterweight ring; 8, guide wheel; 9, fixed frame; 10, connecting frame; 11, connecting plate; 12, first clamping block; 13, first spring; 14, first drive rod; 15, first extrusion rod; 16, second clamping block; 17, second spring; 18, sliding plate; 19, connecting rod; 20, second extrusion rod; 21, second drive rod; 22, third spring; 23, sealing door. DETAILED DESCRIPTION

[0034] Please refer to Figures 1-10 The present application provides a technical solution: a device for preventing blockage of building water supply and drainage and a method for preventing blockage thereof, comprising a drain pipe 1, which is connected to a pollution discharge pipe 2; a filter screen 3 and a sealing plate 4 are arranged in the drain pipe 1; the filter screen 3 and the sealing plate 4 are both in sliding connection with the drain pipe 1 and the filter screen 3 is attached to the sealing plate 4; the sealing plate 4 is located at the joint position of the pollution discharge pipe 2 and the drain pipe 1; a detection mechanism is arranged in the drain pipe 1, which is used to detect whether the filter screen 3 is blocked; a pollution discharge mechanism is arranged in the drain pipe 1, which is used to automatically discharge the blockage on the filter screen 3 into the pollution discharge pipe 2 after the detection mechanism detects that the filter screen 3 is blocked;

[0035] As Figures 2-4As shown, in working, when the drain pipe 1 is blocked, the blockage will directly gather on the filter screen 3, at this time, the weight of the sewage above the filter screen 3 in the drain pipe 1 will gradually increase, and the filter screen 3 will be continuously pressed down with the increase of the weight; at this time, the filter screen 3 can be detected to be blocked by the detection mechanism, and the detection mechanism will drive the pollution discharge mechanism to operate, and the original sealing plate 4 blocking the pollution discharge pipe 2 can be slid to another position by the pollution discharge mechanism, at this time, the pollution discharge pipe 2 is no longer blocked, and the blockage on the filter screen 3 will directly enter the pollution discharge pipe 2, and when the blockage enters the pollution discharge pipe 2, the filter screen 3 recovers to be unblocked, and the filter screen 3 and the sealing plate 4 are reset, and the drain pipe 1 recovers to be normally drained; the device has simple structure and is convenient to use, can automatically detect and clean the blockage after the drain pipe 1 is blocked, and can ensure the unblocking of the drain pipe 1 in the first time.

[0036] As shown in the drawings, Figures 5-6 As a further scheme of the present application, the detection mechanism comprises a sliding rod 5, the sliding rod 5 is fixedly connected with the filter screen 3 and slidably connected with the drain pipe 1; the filter screen 3 is slidably attached to the inner wall of the drain pipe 1 and is in a right-low and left-high state; the sliding rod 5 is fixedly connected with a pull rope 6 at the bottom end and both sides of the sliding rod 5; a counterweight ring 7 is sleeved on the outer surface of the drain pipe 1 and slidably connected with the drain pipe 1; the other end of the pull rope 6 penetrates through the drain pipe 1 and is fixedly connected with the counterweight ring 7.

[0037] The pull rope 6 is gap-fitted with the drain pipe 1; the part of the pull rope 6 penetrating through the drain pipe 1 is in an inclined shape, and the height of the part of the pull rope 6 penetrating through the drain pipe 1 close to the inner side of the drain pipe 1 is lower than the height close to the outer side of the drain pipe 1; the pull rope 6 is rotatably connected with a guide wheel 8 at the positions close to the inner side and the outer side of the drain pipe 1, and the guide wheel 8 is rollingly fitted with the pull rope 6.

[0038] In working, when the filter screen 3 is blocked, the sewage above the filter screen 3 in the drain pipe 1 gradually increases, and the weight increases, so that the filter screen 3 gradually moves downward under the action of the weight of the sewage; the filter screen 3 moves downward to drive the sliding rod 5 to move downward, and the sliding rod 5 will pull the counterweight ring 7 upward through the pull rope 6; when the filter screen 3 moves to the bottommost position, the filter screen 3 is just moved to the position with the same height as the feeding outlet of the pollution discharge pipe 2.

[0039] As shown in the drawings, Figures 5-8 As a further scheme of the present application, the pollution discharge mechanism comprises a fixing frame 9, the fixing frame 9 is fixedly connected with the drain pipe 1 and slidably connected with the sliding rod 5; a connecting frame 10 is fixedly connected with the bottom position of the sealing plate 4 and slidably connected with the fixing frame 9; the fixing frame 9 is provided with a lock catch mechanism, the lock catch mechanism is used to release the connecting frame 10 from the uppermost position of the fixing frame 9 after the detection mechanism detects that the filter screen 3 is blocked.

[0040] The locking mechanism comprises two connecting plates 11 symmetrically arranged on the front and back of the fixing frame 9 and fixedly connected with the fixing frame 9; the connecting plates 11 are symmetrically connected with the first clamping blocks 12 on the left and right sides; the first spring 13 is sleeved on the first clamping block 12, one end of the first spring 13 is fixedly connected with the first clamping block 12 and the other end is fixedly connected with the connecting plate 11; the first clamping block 12 is clamped with the connecting frame 10; the first trigger mechanism is arranged on the sliding rod 5 and is used to trigger the first clamping block 12 to slide on the connecting plate 11 when the sliding rod 5 slides to the bottom position;

[0041] The first trigger mechanism comprises four first driving rods 14 fixedly connected with the four first clamping blocks 12; four first pressing rods 15 are arranged above the four first driving rods 14 and are fixedly connected with the sliding rod 5;

[0042] When the filter screen 3 drives the sliding rod 5 to move downward, the sliding rod 5 drives the four first pressing rods 15 to move downward; when the filter screen 3 drives the sliding rod 5 to move to the bottom position, the four first pressing rods 15 are in contact with the four first driving rods 14 and press the four first driving rods 14 to move; the four first pressing rods 15 drive the four first clamping blocks 12 to move to the outside position, the first clamping blocks 12 are separated from the connecting frame 10 when the first clamping blocks 12 move to the outside position, the connecting frame 10 loses the support and directly falls downward; the sealing plate 4 also falls downward; when the sealing plate 4 and the connecting frame 10 fall to the bottom position, the drain pipe 2 is completely communicated with the water pipe 1, and the blockage on the filter screen 3 directly slides into the drain pipe 2 along the filter screen 3; when the blockage on the filter screen 3 is cleaned, the filter screen 3 is restored to be transparent, under the action of the gravity of the counterweight, the counterweight drives the sliding rod 5 to move upward through the pull rope 6, the sliding rod 5 drives the filter screen 3 and the connecting frame 10 to move upward, and the connecting frame 10 drives the sealing plate 4 to move upward; the connecting frame 10 is clamped by the four first clamping blocks 12 when the connecting frame 10 moves to the uppermost position.

[0043] As shown in Figures 3-4 As a further scheme of the present application, the second clamping block 16 is symmetrically arranged on the front and back of the outer surface of the water pipe 1 and is fixedly connected with the water pipe 1; the second trigger mechanism is arranged on the drain pipe 2 and is used to drive the second clamping block 16 to slide on the water pipe 1 after the blockage enters into the drain pipe 2;

[0044] The second triggering mechanism comprises a sliding plate 18 which is in sealing sliding connection with the inner wall of the blow-off pipe 2; the front and rear sides of the sliding plate 18 are fixedly connected with a connecting rod 19, the end of the connecting rod 19 is fixedly connected with a second extrusion rod 20, the front and rear sides of the second extrusion rod 20 are respectively provided with a second driving rod 21 below, and the front and rear sides of the second driving rod 21 are respectively fixedly connected with the front and rear second clamping blocks 16; the connecting rod 19 is in sliding connection with the blow-off pipe 2, and a third spring 22 is sleeved on the connecting rod 19, one end of the third spring 22 is fixedly connected with the connecting rod 19, and the other end is fixedly connected with the blow-off pipe 2;

[0045] When the filter screen 3 is pressed downward by the weight of the sewage, the filter screen 3 and the sliding rod 5 pull the counterweight ring 7 upward through the pull rope 6, the counterweight ring 7 is clamped by the second clamping block 16 when it moves to the uppermost position, at this time, the filter screen 3 and the sealing plate 4 remain at the bottommost position, and the blockage on the filter screen 3 continuously falls into the blow-off pipe 2; when the blockage on the filter screen 3 completely falls into the blow-off pipe 2, the sliding plate 18 in the blow-off pipe 2 is pressed downward and moves under the action of the weight of the blockage, the sliding plate 18 drives the front and rear connecting rods 19 to move downward when it moves downward, the connecting rod 19 drives the second extrusion rod 20 to move downward, the second extrusion rod 20 drives the front and rear second clamping blocks 16 to move forward and backward respectively by extruding the second driving rod 21 when it moves to the bottommost position; the front and rear second clamping blocks 16 are separated from the counterweight ring 7 when they move, and the counterweight ring 7 can move downward and pull the filter screen 3 upward through the pull rope 6 after the second clamping block 16 is separated from the counterweight ring 7.

[0046] As shown in Figure 2 As a further scheme of the present application, a sealing door 23 is arranged at the right side of the blow-off pipe 2, and the sealing door 23 is hingedly arranged with the blow-off pipe 2.

[0047] When the blockage in the drain pipe 1 enters the blow-off pipe 2, the blockage in the blow-off pipe 2 can be directly cleaned by manually opening the sealing door 23.

[0048] As shown in Figure 1 As a further scheme of the present application, a method for preventing blockage of building water supply and drainage is provided, and the specific steps of the method are as follows.

[0049] Step one: when the blockage in the drain pipe 1 blocks the filter screen 3, the detection mechanism detects that the filter screen 3 is blocked;

[0050] Step two: the detection mechanism drives the blow-off mechanism to operate, and the blow-off mechanism drives the sealing plate 4 to move away from the position of blocking the blow-off pipe 2;

[0051] Step three: the blockage on the filter screen 3 will directly enter into the drain pipe 2, and the blockage in the drain pipe 1 is cleaned up;

[0052] Step four: after the blockage in the drain pipe 1 completely enters into the drain pipe 2, the sealing plate 4 and the filter screen 3 are reset.

Claims

1. An anti-clogging device for building water supply and drainage, comprising a drain pipe (1), characterized in that: A sewage pipe (2) is connected to the drain pipe (1); a filter screen (3) and a sealing plate (4) are provided inside the drain pipe (1); the filter screen (3) and the sealing plate (4) are slidably connected to the drain pipe (1) and the filter screen (3) is in contact with the sealing plate (4); the sealing plate (4) is located at the docking position with the sewage pipe (2) and the drain pipe (1); a detection mechanism is provided inside the drain pipe (1), which is used to detect whether the filter screen (3) is blocked; a sewage discharge mechanism is provided inside the drain pipe (1), which is used to automatically discharge the blockage on the filter screen (3) into the sewage pipe (2) after the detection mechanism detects that the filter screen (3) is blocked; The detection mechanism includes a sliding rod (5), which is fixedly connected to the filter screen (3) and slidably connected to the drain pipe (1); the filter screen (3) is slidably attached to the inner wall of the drain pipe (1) and the filter screen (3) is in a right-low-left-high state; pull ropes (6) are symmetrically fixedly connected to the left and right sides of the bottom end of the sliding rod (5); a counterweight ring (7) is sleeved on the outer surface of the drain pipe (1), and the counterweight ring (7) is slidably connected to the drain pipe (1); the other end of the pull rope (6) passes through the drain pipe (1) and is fixedly connected to the counterweight ring (7); The sewage discharge mechanism includes a fixed frame (9), which is fixedly connected to the drain pipe (1) and slidably connected to the sliding rod (5); a connecting frame (10) is fixedly connected to the bottom position of the sealing plate (4), and the connecting frame (10) is slidably connected to the fixed frame (9); the fixed frame (9) is provided with a locking mechanism, which is used to release the connecting frame (10) at the top position of the fixed frame (9) after the detection mechanism detects that the filter screen (3) is blocked; The locking mechanism includes two connecting plates (11), which are symmetrically distributed on the front and rear sides of the fixed frame (9) and are fixedly connected to the fixed frame (9); the connecting plates (11) are symmetrically slidably connected to the left and right sides of the connecting plates (11), and a first spring (13) is sleeved on the first spring (12). One end of the first spring (13) is fixedly connected to the first spring (12) and the other end is fixedly connected to the connecting plate (11); the first spring (12) is engaged with the connecting frame (10); the sliding rod (5) is provided with a first triggering mechanism, which is used to trigger the first spring (12) to slide on the connecting plate (11) when the sliding rod (5) slides to the bottom position; The first triggering mechanism includes four first drive rods (14), which are fixedly connected to four first locking blocks (12) respectively; four first pressing rods (15) are respectively provided above the four first drive rods (14), and the four first pressing rods (15) are fixedly connected to the sliding rod (5).

2. The anti-clogging device for building water supply and drainage according to claim 1, characterized in that: The pull rope (6) is fitted with the drain pipe (1) with a clearance; the part of the pull rope (6) that penetrates the drain pipe (1) is inclined, and the height of the part of the pull rope (6) that passes through the drain pipe (1) near the inner side of the drain pipe (1) is lower than the height of the part near the outer side of the drain pipe (1); the pull rope (6) located near the inner side and the outer side of the drain pipe (1) is rotatably connected to a guide wheel (8), and the guide wheel (8) is in rolling cooperation with the pull rope (6).

3. The anti-clogging device for building water supply and drainage according to claim 1, characterized in that: The drain pipe (1) has a second locking block (16) symmetrically slidably connected to the front and rear sides of its outer surface. A second spring (17) is fitted on the second locking block (16). One end of the second spring (17) is fixedly connected to the second locking block (16) and the other end is fixedly connected to the drain pipe (1). The sewage pipe (2) is provided with a second triggering mechanism. The second triggering mechanism is used to drive the second locking block (16) to slide on the drain pipe (1) after the blockage enters the sewage pipe (2).

4. The anti-clogging device for building water supply and drainage according to claim 3, characterized in that: The second triggering mechanism includes a sliding plate (18), which is located inside the sewage pipe (2) and is slidably connected to the inner wall of the sewage pipe (2); a connecting rod (19) is symmetrically fixedly connected to the front and rear sides of the sliding plate (18), and a second pressing rod (20) is fixedly connected to the end of the connecting rod (19); a second driving rod (21) is provided directly below the second pressing rod (20) on the front and rear sides, and the second driving rod (21) on the front and rear sides is fixedly connected to the second locking block (16) on the front and rear sides respectively; the connecting rod (19) is slidably connected to the sewage pipe (2) and a third spring (22) is sleeved on the connecting rod (19); one end of the third spring (22) is fixedly connected to the connecting rod (19) and the other end is fixedly connected to the sewage pipe (2).

5. The anti-clogging device for building water supply and drainage according to claim 1, characterized in that: A sealing door (23) is provided on the right side of the sewage pipe (2), and the sealing door (23) is hinged to the sewage pipe (2).

6. A method for preventing blockage in building water supply and drainage, applicable to the anti-blockage device for building water supply and drainage as described in any one of claims 1-5, characterized in that: The specific steps of this method are as follows: Step 1: When the blockage in the drain pipe (1) clogs the filter screen (3), the detection agency detects that the filter screen (3) is blocked; Step 2: The detection mechanism drives the sewage discharge mechanism to operate, and the sewage discharge mechanism will drive the sealing plate (4) to move away from the position blocking the sewage pipe (2); Step 3: The blockage on the filter screen (3) will directly enter the drain pipe (2), and the blockage in the drain pipe (1) will be cleared; Step 4: After the blockage in the drain pipe (1) has completely entered the sewage pipe (2), the sealing plate (4) and the filter screen (3) are reset.

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