Dredging device for water supply and drainage pipeline

By designing a water supply and drainage pipe dredging device including a water inlet cleaning mechanism, a filling unit, a water outlet cleaning mechanism and a heating rod, the problem of poor treatment of pipe port blockages in the prior art is solved, and a more efficient blockage cleaning and dissolution effect is achieved.

CN222771601UActive Publication Date: 2025-04-18JILIN BOCHUANG WATER DESIGN CO LTD
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Patent Information

Application Number
CN202421366868.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-14
Publication Date
2025-04-18
Estimated Expiration
2034-06-14

AI Technical Summary

Technical Problem

The existing water supply and drainage pipe dredging method is not effective in handling a large number of blockages at the pipe ports.

Method used

A dredging device including a water inlet end cleaning mechanism, a filling unit, a water outlet cleaning mechanism and a heating rod is designed. The treatment of the clogged substance is strengthened by rotary scratching and circumcision cleaning, and the cleaning liquid is heated by heating the heating rod to accelerate the softening and dissolution of the clogged substance.

Benefits of technology

Compared with the traditional cleaning liquid infusion and soaking method, the dredging and cleaning effect of a large number of blockages at the water inlet and outlet of the water supply and drainage pipe is significantly enhanced, and the softening and dissolution rate of blockages is improved.

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Abstract

The utility model relates to the field of water supply and drainage pipelines, in particular to a water supply and drainage pipeline dredging device which solves the technical problem that an existing water supply and drainage pipeline dredging mode is poor in treatment effect on a large number of blockages at a port. According to the technical scheme, the dredging device for the water supply and drainage pipeline comprises a base table, a handle, a water inlet end cleaning mechanism, a filling unit, a liquid injection pipe, a supporting assembly, a water outlet end cleaning mechanism and a heating rod; according to the cleaning device, the water inlet end cleaning mechanism is used as a carrying platform of the cleaning liquid filling unit, and the water inlet end and the water outlet end of the water supply and drainage pipe can be subjected to rotary scraping cleaning and girdling cleaning respectively in combination with the water outlet end cleaning mechanism; the dredging and cleaning effect on a large amount of blockages at the water inlet end and the water outlet end of the water supply and drainage pipe is enhanced, and the problem that an existing water supply and drainage pipe dredging mode is poor in treatment effect on a large amount of blockages at ports is solved.
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Description

Technical Field

[0001] The utility model relates to the field of water supply and drainage pipelines, in particular to a water supply and drainage pipeline dredging device. Background Art

[0002] The water supply and drainage pipes in construction projects are generally PVC pipes with a diameter between DN15 and DN125. Domestic sewage and accumulated water on the roof of buildings must be introduced into the ground or municipal pipelines through such water supply and drainage pipes. However, there may be relatively large foreign objects in these sewages that block the pipe openings, and there may be some calcium and magnesium compound impurities in the water. After long-term use, these impurities will form scale in the pipes, resulting in poor water flow in the pipes.

[0003] The current method for unclogging water supply and drainage pipes is to seal both ends of the pipes, then fill them with cleaning fluid to soften and dissolve the blockages. However, the ports at the water inlet and outlet ends of the water supply and drainage pipes are often where the most dirt is. This method of unclogging with cleaning fluid is not effective for thicker dirt at the ports.

[0004] Therefore, in view of the fact that the above-mentioned existing water supply and drainage pipe unclogging methods are not effective in dealing with a large number of blockages at the ports, a unclogging device based on a cleaning liquid injection cleaning method can be designed to further strengthen the treatment of dirt at the water supply and drainage pipe ports. Utility Model Content

[0005] In order to overcome the problem that the existing water supply and drainage pipe dredging method is not effective in dealing with a large number of blockages at the port.

[0006] The technical solution of the utility model is: a water supply and drainage pipe unclogging device, including a base, a handle, a water inlet cleaning mechanism, a perfusion unit, an injection pipe, a support assembly, a water outlet cleaning mechanism, and a heating rod; the base is a hollow truncated cone structure and a handle is fixedly installed on the upper end, a water inlet cleaning mechanism connected to the water inlet of the water supply and drainage pipe is installed on the base, a perfusion unit is arranged in the water inlet cleaning mechanism, the perfusion unit is connected to a pump for pumping pipeline cleaning liquid through the injection pipe, a support assembly extending into the water supply and drainage pipe is installed at the lower end of the perfusion unit, a water outlet cleaning mechanism is installed at one end of the water outlet of the water supply and drainage pipe, and a heating rod externally powered by AC power is installed in the water outlet cleaning mechanism.

[0007] Preferably, the water inlet cleaning mechanism serves as a carrying platform for the cleaning liquid injection unit, and combined with the water outlet cleaning mechanism, can perform rotational scraping cleaning and circumferential cutting cleaning on the water inlet and outlet of the water supply and drainage pipe respectively, and then perform cleaning liquid injection and soaking treatment after treatment. Compared with the traditional single cleaning liquid injection and soaking dredging method, the dredging and cleaning effect is enhanced for a large number of blockages at the water inlet and outlet of the water supply and drainage pipe. The cleaning liquid can use sodium carbonate, sodium hypochlorite, flash-soluble quick-clearing factor, etc. that are commonly used to dredge pipes in the prior art.

[0008] Preferably, the water inlet cleaning mechanism includes a motor, a turntable, positioning holes, a lever, and a wing plate; the motor is fixedly installed inside the hollow structure of the base, the turntable is located below the base and fixedly connected to the drive shaft of the motor, a plurality of positioning holes are equidistantly provided at the lower end of the turntable extending from the center of the circle to one side of the edge, the lever is inserted into the water inlet port of the water supply and drainage pipe, and the side wall is fixedly connected with a wing plate that rests against the inner wall of the water inlet port, a gasket is adhered to the lower end of the turntable, and the gasket is provided with through holes corresponding to the positioning holes; the motor drives the turntable to rotate, so that the lever and the wing plate move in a circumferential manner along the inner wall of the water inlet end of the water supply and drainage pipe, forming a circumferential shear effect on the dirt blocked at the water inlet end, scraping the dirt off and dropping it inside the pipe, so as to facilitate full contact with the cleaning liquid.

[0009] Preferably, the water inlet cleaning mechanism also includes a plug and a pin; the upper end of the lever is fixedly connected to the plug and the plug is inserted into the corresponding positioning hole, the side wall of the turntable is provided with a pin hole that passes through each positioning hole, the outer wall of the plug is provided with another pin hole, and pins are inserted between the pin holes to fix the plug to the turntable. The lever is connected to different positioning holes through the plug to change its position relative to the turntable, so that the water inlet end of water supply and drainage pipes of different specifications can be cleaned, and after being inserted into the positioning hole, it is fixed by a horizontally inserted pin. In practical applications, bolts or spring pins can also be used, which can achieve the purpose of fixing the lever.

[0010] Preferably, the injection unit includes: a through pipe, a water injection channel, and a bearing member; the through pipe is fixedly connected in the middle of the lower end of the turntable, a water injection channel connected to the through pipe is opened in the turntable, the water injection channel extends upward to the upper surface of the turntable, a bearing member is installed at the upper end of the water injection channel, the injection pipe is movably connected to the bearing member, and an external solution pump pumps the cleaning liquid into the water injection channel through the injection pipe at a certain pressure, and finally flows out from the through pipe, fills the water supply and drainage channel, and soaks and softens the internal blockages.

[0011] Preferably, the supporting assembly includes a sleeve, a support sleeve, and a bracket; the lower end of the through pipe has an external thread, the sleeve is threadedly connected to the lower end of the through pipe, the lower end of the sleeve is rotatably connected to the support sleeve, the lower end of the support sleeve is fixedly connected to a bracket with a plurality of spoke-shaped structures, the outer wall of the bracket abuts against the inner wall of the water inlet port of the water supply and drainage pipe, the sleeve is installed with the through pipe by means of a threaded connection, can be quickly disassembled, and different sizes and corresponding bracket structures can be replaced for water supply and drainage pipes of different specifications. The bracket abuts against the inner wall of the water supply and drainage pipe to prevent the turntable from moving horizontally, thereby ensuring its smooth rotation.

[0012] Preferably, the water outlet cleaning mechanism includes a plug, a ring knife, and a rubber plug; the plug is arranged below the water outlet port of the water supply and drainage pipe, the upper end of the plug is fixedly connected with a ring knife with an inverted frustum-shaped structure, the outer edge of the upper end of the ring knife is a blade structure and is tightly attached to the inner wall of the water outlet port of the water supply and drainage pipe, the upper end of the plug is fixedly connected with a rubber plug wrapped around the outer side of the lower end of the ring knife, the outer wall of the rubber plug is attached to the inner wall of the water outlet port of the drainage pipe to form a sealing structure, when the ring knife is inserted from the lower end of the water supply and drainage pipe, the clogging dirt attached to the pipe mouth is cut off and falls into the cavity of the ring knife, and can be fully dissolved after contact with the cleaning liquid, and the pipe mouth is sealed with the rubber plug to prevent leakage of the cleaning liquid.

[0013] Preferably, the water outlet cleaning mechanism also includes a screw ring and a fastening sleeve; a screw ring with four openings on the side wall is fixedly connected to the upper end of the plug, the screw ring is sleeved on the outside of the water outlet end of the water supply and drainage pipe, and a fastening sleeve is threadedly connected to the screw ring to press and fix the screw ring on the outer wall of the water supply and drainage pipe. The inner diameter of the screw ring is slightly larger than the outer diameter of the pipe. When it is sleeved on the outer wall of the water outlet end of the pipe, the two cannot be fixed. By screwing the fastening sleeve, the screw ring is gradually compressed and tightened, and finally fixed to the outer wall of the pipe.

[0014] Beneficial effects of the utility model:

[0015] 1. The water inlet cleaning mechanism is used as the carrying platform of the cleaning liquid injection unit. Combined with the water outlet cleaning mechanism, the water inlet and outlet of the water supply and drainage pipe can be respectively cleaned by rotary scraping and circumferential cutting. Compared with the traditional cleaning liquid injection and immersion dredging method, the dredging and cleaning effect of a large number of blockages at the water inlet and outlet of the water supply and drainage pipe is enhanced;

[0016] 2. Through the heating rod mounted on the cleaning mechanism at the water outlet, the cleaning liquid can be heated during the process of pouring the cleaning liquid to dredge the pipe, thereby accelerating the softening and dissolving rate of the blocked dirt. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 What is shown is a schematic diagram of the external three-dimensional structure of the water supply and drainage pipe dredging device of the utility model;

[0018] Figure 2 What is shown is a schematic diagram of the internal three-dimensional structure of the water supply and drainage pipe dredging device of the utility model;

[0019] Figure 3 Shown is a schematic diagram of the three-dimensional structure of the water inlet end cleaning mechanism of the water supply and drainage pipe dredging device of the utility model;

[0020] Figure 4 What is shown is a schematic diagram of the disassembled three-dimensional structure of the water inlet end cleaning mechanism of the water supply and drainage pipe dredging device of the utility model;

[0021] Figure 5Shown is a schematic diagram of the three-dimensional structure of the assembly of the water outlet cleaning mechanism of the water supply and drainage pipe dredging device of the utility model;

[0022] Figure 6 What is shown is a schematic diagram of the disassembled three-dimensional structure of the water outlet end cleaning mechanism of the water supply and drainage pipe dredging device of the present invention.

[0023] Explanation of the reference numerals: 1. base; 2. handle; 5. injection tube; 8. heating rod; 9. gasket; 10. through hole; 301. motor; 302. turntable; 303. positioning hole; 304. lever; 305. wing plate; 306. plug; 307. pin; 401. through pipe; 402. water injection channel; 403. bearing; 601. screw sleeve; 602. support sleeve; 603. bracket; 701. plug; 702. ring knife; 703. rubber plug; 704. screw ring; 705. fastening sleeve. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] See also Figure 1-2 The utility model provides an embodiment: a water supply and drainage pipe dredging device, including a base 1, a handle 2, a water inlet cleaning mechanism, a pouring unit, an injection pipe 5, a support assembly, a water outlet cleaning mechanism, and a heating rod 8; the base 1 is a hollow truncated cone structure and a handle 2 is fixedly installed on the upper end, a water inlet cleaning mechanism connected to the water inlet of the water supply and drainage pipe is installed on the base 1, a pouring unit is arranged in the water inlet cleaning mechanism, the pouring unit is connected to a pump for pumping pipeline cleaning liquid through the injection pipe 5, a support assembly extending into the water supply and drainage pipe is installed at the lower end of the pouring unit, and a water outlet end of the water supply and drainage pipe is installed There is a water outlet cleaning mechanism, in which a heating rod 8 powered by an external mains power supply is installed. The water inlet cleaning mechanism serves as a carrying platform for the cleaning liquid injection unit. Combined with the water outlet cleaning mechanism, the water inlet and outlet ends of the water supply and drainage pipe can be respectively subjected to rotational scraping cleaning and circumferential cutting cleaning, and then the cleaning liquid is injected and soaked after treatment. Compared with the traditional single cleaning liquid injection and soaking dredging method, the dredging and cleaning effect is enhanced for a large number of blockages at the water inlet and outlet ends of the water supply and drainage pipe. The cleaning liquid can use sodium carbonate, sodium hypochlorite, flash-soluble quick-clearing factor, etc., which are commonly used for dredging pipes in the prior art.

[0026] See also Figure 3-4In this embodiment, the water inlet cleaning mechanism includes a motor 301, a turntable 302, a positioning hole 303, a lever 304, and a wing plate 305; the motor 301 is fixedly installed inside the hollow structure of the base 1, the turntable 302 is located below the base 1 and is fixedly connected to the transmission shaft of the motor 301, and a plurality of positioning holes 303 are equidistantly provided at the lower end of the turntable 302 extending from the center of the circle to one side of the edge, the lever 304 is inserted into the water inlet port of the water supply and drainage pipe, and the side wall is fixedly connected with a wing plate 305 that abuts against the inner wall of the water inlet port, and a gasket 9 is adhered to the lower end of the turntable 302. The plate 9 is provided with through holes 10 corresponding to the positioning holes 303 one by one. The motor 301 drives the turntable 302 to rotate, so that the lever 304 and the wing plate 305 move in a circular manner along the inner wall of the water inlet end of the water supply and drainage pipe, forming a circular shearing effect on the dirt blocked at the water inlet end, scraping the dirt off and dropping it inside the pipe, which is convenient for full contact with the cleaning liquid. The water inlet cleaning mechanism also includes a plug 306 and a pin 307; the upper end of the lever 304 is fixedly connected to the plug 306 and the plug 306 is plugged and installed in the corresponding positioning hole 303, and the side wall of the turntable 302 is provided with holes corresponding to the positioning holes 303. The positioning hole 303 is a pin hole that passes through, and the outer wall of the plug 306 is provided with another pin hole. A pin 307 is inserted between the pin holes to fix the plug 306 to the turntable 302. The lever 304 is docked with different positioning holes 303 through the plug 306 to change its position relative to the turntable 302, and the water inlet end of water supply and drainage pipes of different specifications can be cleaned. After being inserted into the positioning hole 303, it is fixed by the horizontally inserted pin 307. In practical applications, bolts or spring pins can also be used to achieve the purpose of fixing the lever 304. The perfusion unit includes a through pipe 401, water injection channel 402, bearing member 403; the through pipe 401 is fixedly connected to the middle of the lower end of the turntable 302, and a water injection channel 402 connected to the through pipe 401 is opened in the turntable 302, and the water injection channel 402 extends upward to the upper surface of the turntable 302, and a bearing member 403 is installed on the upper end of the water injection channel 402, and the injection pipe 5 is movably connected to the bearing member 403. An external solution pump pumps the cleaning liquid into the water injection channel 402 through the injection pipe 5 at a certain pressure, and finally flows out from the through pipe 401, filling the water supply and drainage channel, and soaking and softening the internal blockage.

[0027] See also Figure 5-6In this embodiment, the support assembly includes a screw sleeve 601, a support sleeve 602, and a bracket 603; the lower end of the through pipe 401 has an external thread, the screw sleeve 601 is threadedly connected to the lower end of the through pipe 401, the lower end of the screw sleeve 601 is rotatably connected to the support sleeve 602, and the lower end of the support sleeve 602 is fixedly connected to a plurality of spoke-shaped brackets 603, the outer wall of the bracket 603 is against the inner wall of the water inlet port of the water supply and drainage pipe, the screw sleeve 601 is installed with the through pipe 401 by means of a threaded connection, and can be quickly disassembled and Different sizes of brackets 603 structures that are compatible with different specifications of water supply and drainage pipes are replaced. The bracket 603 is supported against the inner wall of the water supply and drainage pipe to prevent the turntable 302 from moving horizontally and ensure its smooth rotation. The water outlet cleaning mechanism includes a plug 701, a ring knife 702, and a rubber plug 703; the plug 701 is arranged below the water outlet port of the water supply and drainage pipe, and the upper end of the plug 701 is fixedly connected with a ring knife 702 with an inverted frustum-shaped structure. The outer edge of the upper end of the ring knife 702 is a blade foot structure and is close to the water outlet port. The inner wall of the water outlet port of the drain pipe and the upper end of the plug 701 are fixedly connected with a rubber plug 703 wrapped around the outer side of the lower end of the ring knife 702. The outer wall of the rubber plug 703 is attached to the inner wall of the water outlet port of the drain pipe to form a sealing structure. When the ring knife 702 is inserted from the lower end of the water supply and drainage pipe, the clogging dirt attached to the pipe mouth is cut off and falls into the cavity of the ring knife 702. After contacting with the cleaning liquid, it can be fully dissolved. The pipe mouth is sealed with the rubber plug 703 to prevent the cleaning liquid from leaking. The water outlet cleaning mechanism also includes a screw ring 704, A tightening sleeve 705; a screw ring 704 with four openings on the side wall is fixedly connected to the upper end of the plug 701. The screw ring 704 is sleeved on the outer side of the water outlet end of the water supply and drainage pipe. A tightening sleeve 705 is threadedly connected to the screw ring 704 to press and fix the screw ring 704 on the outer wall of the water supply and drainage pipe. The inner diameter of the screw ring 704 is slightly larger than the outer diameter of the pipe. When it is sleeved on the outer wall of the water outlet end of the pipe, the two cannot be fixed. By screwing on the tightening sleeve 705, the screw ring 704 is gradually compressed and tightened, and finally fixed on the outer wall of the pipe.

[0028] When working, the user inserts the plug 306 into the appropriate positioning hole 303 according to the specifications of the water supply and drainage pipe, and uses the pin 307 to fix the lever 304, and inserts the lever 304 and the through pipe 401 together into the water supply and drainage channel, so that the wing plate 305 cuts into the dirt blocking the water inlet end of the pipe;

[0029] Then insert the ring knife 702 from the lower end of the water supply and drainage pipe, and the clogging dirt attached to the pipe opening is cut off by the ring knife 702 and falls into the cavity of the ring knife 702, until the rubber plug 703 is pushed into the pipe and closes the pipe opening, tighten the fastening sleeve 705, gradually compress and tighten the screw ring 704, and finally fix it on the outer wall of the pipe;

[0030] The motor 301 is started to drive the turntable 302 to rotate, so that the lever 304 and the wing plate 305 move in a circular manner along the inner wall of the water inlet end of the water supply and drainage pipe, forming a circular shearing effect on the dirt blocking the water inlet end, and scraping the dirt off and dropping it into the inside of the pipe;

[0031] Then, the cleaning liquid is pumped into the water injection channel 402 through the injection pipe 5 at a certain pressure through an external solution pump, and finally flows out from the through pipe 401, filling the water supply and drainage channel. Under the heating effect of the heating rod 8, the cleaning liquid is at a temperature of 50-60°C, which accelerates the soaking and softening of the internal blockage.

[0032] Through the above steps, the water inlet cleaning mechanism is used as a carrying platform for the cleaning liquid injection unit, and combined with the water outlet cleaning mechanism, the water inlet and outlet ends of the water supply and drainage pipe can be respectively subjected to rotational scraping cleaning and circular cutting cleaning. Compared with the traditional cleaning liquid injection and immersion dredging method, the dredging and cleaning effect is enhanced for a large number of blockages at the water inlet and outlet ends of the water supply and drainage pipe, so as to solve the problem that the existing water supply and drainage pipe dredging method has poor effect in handling a large number of blockages at the port.

[0033] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A water supply and drainage pipe dredging device, comprising a base (1) and a handle (2); characterized in that: It also includes a water inlet cleaning mechanism, a perfusion unit, a liquid injection pipe (5), a support component, a water outlet cleaning mechanism, and a heating rod (8); the base (1) is a hollow truncated cone structure and a handle (2) is fixedly installed on the upper end; the base (1) is provided with a water inlet cleaning mechanism connected to the water inlet of the water supply and drainage pipe; the water inlet cleaning mechanism is provided with a perfusion unit, the perfusion unit is connected to a pump for pumping pipeline cleaning liquid through the liquid injection pipe (5); the lower end of the perfusion unit is provided with a support component extending into the water supply and drainage pipe; the water outlet cleaning mechanism is provided at one end of the water outlet of the water supply and drainage pipe; the water outlet cleaning mechanism is provided with a heating rod (8) externally powered by mains electricity.

2. A water supply and drainage pipe dredging device according to claim 1, characterized in that: The water inlet cleaning mechanism comprises a motor (301), a rotating platform (302), a positioning hole (303), a lever (304), and a wing plate (305); the motor (301) is fixedly installed inside the hollow structure of the base (1); the rotating platform (302) is located below the base (1) and is fixedly connected to the transmission shaft of the motor (301); a plurality of positioning holes (303) are equidistantly provided at the lower end of the rotating platform (302) extending from the center of the circle to one side of the edge; the lever (304) is inserted into the water inlet port of the water supply and drainage pipe and the side wall is fixedly connected with a wing plate (305) that abuts against the inner wall of the water inlet port; a gasket (9) is adhered to the lower end of the rotating platform (302); and through holes (10) corresponding to the positioning holes (303) are provided on the gasket (9).

3. A water supply and drainage pipe dredging device according to claim 2, characterized in that: The water inlet cleaning mechanism also includes a plug (306) and a pin (307); the upper end of the lever (304) is fixedly connected with the plug (306) and the plug (306) is inserted and installed in the corresponding positioning hole (303); a pin hole that penetrates each positioning hole (303) is opened on the side wall of the turntable (302); another pin hole is opened on the outer side wall of the plug (306); a pin (307) is inserted between the pin holes to fix the plug (306) and the turntable (302).

4. A water supply and drainage pipe dredging device according to claim 3, characterized in that: The injection unit comprises a through pipe (401), a water injection channel (402), and a bearing member (403); the through pipe (401) is fixedly connected to the middle of the lower end of the turntable (302); a water injection channel (402) communicating with the through pipe (401) is provided in the turntable (302); the water injection channel (402) extends upward to the upper surface of the turntable (302); a bearing member (403) is installed at the upper end of the water injection channel (402); and the liquid injection pipe (5) is movably connected to the bearing member (403).

5. A water supply and drainage pipe dredging device according to claim 4, characterized in that: The support assembly comprises a screw sleeve (601), a support sleeve (602), and a bracket (603); the lower end of the through pipe (401) has an external thread, the screw sleeve (601) is threadedly connected to the lower end of the through pipe (401), the lower end of the screw sleeve (601) is rotatably connected to the support sleeve (602), the lower end of the support sleeve (602) is fixedly connected to a bracket (603) with a plurality of spoke-shaped structures, and the outer wall of the bracket (603) is against the inner wall of the water inlet port of the water supply and drainage pipe.

6. A water supply and drainage pipe dredging device according to claim 5, characterized in that: The water outlet cleaning mechanism comprises a plug (701), a ring knife (702), and a rubber plug (703); the plug (701) is arranged below the water outlet port of the water supply and drainage pipe, the upper end of the plug (701) is fixedly connected with a ring knife (702) with an inverted truncated cone structure, the outer edge of the upper end of the ring knife (702) is a blade foot structure and is closely attached to the inner wall of the water outlet port of the water supply and drainage pipe, The upper end of the plug (701) is fixedly connected with a rubber plug (703) wrapped around the outer side of the lower end of the ring knife (702), and the outer wall of the rubber plug (703) is attached to the inner wall of the water outlet port of the drain pipe to form a sealing structure.

7. A water supply and drainage pipe dredging device according to claim 6, characterized in that: The water outlet cleaning mechanism also includes a screw ring (704) and a fastening sleeve (705); the upper end of the plug (701) is fixedly connected to a screw ring (704) having four openings on the side wall; the screw ring (704) is sleeved on the outer side of the water outlet of the water supply and drainage pipe; the screw ring (704) is threadedly connected to a fastening sleeve (705) to press and fix the screw ring (704) on the outer wall of the water supply and drainage pipe.