CN117569439A - Building water supply and drainage device with self-dredging function - Google Patents

Abstract

The application relates to the technical field of water supply and drainage pipelines, in particular to a building water supply and drainage device with a self-dredging function, which comprises a main pipe body, a cleaning assembly and a transmission piece. The main pipe body comprises two sections of drain pipes, a connecting pipe is communicated between the two sections of drain pipes, and an included angle between the length directions of the two sections of drain pipes is smaller than 180 degrees. The cleaning assembly comprises a cleaning impeller and a scraping piece, the cleaning impeller is rotationally connected in the connecting pipe, the edge of the cleaning impeller is abutted to the inner wall of the connecting pipe, and the transmission piece is arranged between the cleaning impeller and the scraping piece, so that the scraping piece is driven to rotate when the cleaning impeller rotates. The main pipe body can automatically clean the scale and pollutants in the drain pipe and the connecting pipe when sewage is discharged by utilizing the cooperation of the cleaning impeller, the scraping part and the transmission part. The method has the effect of keeping the main pipe body pipeline unobstructed.

Description

Building water supply and drainage device with self-dredging function

Technical Field

The application relates to the technical field of water supply and drainage pipelines, in particular to a building water supply and drainage device with a self-dredging function.

Background

Building water supply and drainage pipelines refer to pipeline systems used in buildings for conveying water sources, draining rainwater and sewage. The building water supply and drainage pipeline comprises a water supply pipeline and a drainage pipeline. The water supply pipeline is mainly used for conveying various water bodies such as drinking water, domestic water, industrial water and the like, and the drainage pipeline is mainly used for draining domestic sewage, rainwater and other waste water.

At present, when the drainage pipeline is used, scale and some pollutants in water are easily adsorbed on the pipe wall of the drainage pipeline or accumulated at the bending part of the drainage pipeline, and the phenomenon of blockage of the drainage pipeline can be easily caused as the scale or the pollutants are accumulated more along with the time.

In the related art described above, scale or pollutants accumulated for a long time are liable to cause clogging of the drain pipe.

Disclosure of Invention

In order to clear up incrustation scale and pollutant, keep the unobstructed of pipeline, this application provides a building plumbing installation with from dredging function.

The application provides a building plumbing installation with from dredging function adopts following technical scheme:

building plumbing installation with from dredging function includes:

the main pipe body comprises two sections of drain pipes, a connecting pipe is communicated between the two sections of drain pipes, and an included angle between the two sections of drain pipes in the length direction is smaller than 180 degrees;

the cleaning assembly comprises cleaning impellers and scraping pieces, the cleaning impellers are rotatably connected in the connecting pipes, the edges of the cleaning impellers are abutted to the inner walls of the connecting pipes, two scraping pieces are arranged and are rotatably connected in two sections of the drainage pipes in one-to-one correspondence, the scraping pieces rotate around the axes of the drainage pipes, and the scraping pieces are abutted to the inner walls of the drainage pipes;

the transmission piece is arranged between the cleaning impeller and the scraping piece, so that the cleaning impeller drives the scraping piece to rotate when rotating.

By adopting the technical scheme, when the main pipe body discharges sewage, the sewage flows through the connecting pipe from the drain pipe and flows out from the drain pipe at the other end. When sewage passes through the connecting pipe, because the connecting pipe is arranged in a bending way, some pollutants in the sewage are easily accumulated at the connecting pipe, but the sewage can drive the cleaning impeller to rotate through the connecting pipe, and the edge of the cleaning impeller is abutted against the inner wall of the connecting pipe when the cleaning impeller rotates, so that the accumulated pollutants in the connecting pipe are cleaned, and the smoothness of the connecting pipe is ensured.

When the cleaning impeller rotates, the transmission part drives the scraping part to rotate, so that the scraping part continuously scrapes the scale adsorbed on the inner wall of the drain pipe.

The cleaning impeller, the scraping piece and the transmission piece are matched, so that the main pipe body can automatically clean scale and pollutants in the drain pipe and the connecting pipe when sewage is discharged, and the smoothness of the pipeline of the main pipe body is maintained.

Optionally, the connecting pipe is circular-arc, clean impeller is including rotating the seat, rotates the seat and rotates to be connected on the connecting pipe, it is connected with clean leaf to rotate the circumference of seat, the one end fixed connection of clean leaf is in rotate on the seat, the other end can the butt be in when rotating on the circular-arc inner wall of connecting pipe, rotate the seat with the driving medium is connected.

Through adopting above-mentioned technical scheme, when sewage passes through the connecting pipe, sewage strikes and drives the rotation seat on clean leaf and rotate, utilizes sewage continuous flow for clean leaf and the continuous rotation of rotation seat, the driving medium utilizes the rotation of rotation seat to drive the piece of striking off to rotate afterwards.

Optionally, the cleaning blade is bent, and the portion of the cleaning blade She Wanshe has elasticity, and one side of the cleaning blade She Tuchu faces the rotating direction of the cleaning blade.

Through adopting above-mentioned technical scheme, the clean leaf of buckling can accept a portion sewage for the impact that sewage produced can be utilized by a greater extent, and elastic kink can not fragile when bearing the impact simultaneously.

Optionally, the cleaning She Yuanli one end of the rotating base is provided with cleaning teeth, and the cleaning teeth on the adjacent cleaning blades are staggered with each other.

Through adopting above-mentioned technical scheme, the setting of clean tooth is convenient for clean the leaf and scrapes the pollutant of piling up in the connecting pipe, and the cleaning tooth that crisscross setting simultaneously makes clean leaf clean the pollutant of piling up in with the connecting pipe to strike off cleaner.

Optionally, the scraping piece includes swivel becket, striking off the board, the swivel becket rotates to be connected on the drain pipe, just the swivel becket with the driving medium is connected, strike off the board butt and be in on the inside wall of drain pipe, just strike off the board with swivel becket fixed connection.

Through adopting above-mentioned technical scheme, the driving medium drives and rotates, and rotatory in-process of swivel becket drives the striking off board and rotates, strikes off the absorptive incrustation scale on the drain pipe inner wall of striking off board pivoted in-process, prevents that piled up incrustation scale from causing the jam of drain pipe to keep the unobstructed of drain pipe.

Optionally, the scraping plate is provided with a plurality of, and is a plurality of the scraping plate is followed the circumference evenly distributed of swivel becket, and a plurality of the scraping plate is all fixed connection on the swivel becket.

Through adopting above-mentioned technical scheme, the setting of a plurality of striking off plates makes the striking off plate clean the incrustation scale clearance in to the drain pipe more.

Optionally, the scraping plate is spirally arranged, and the spirally arranged scraping plate is distributed on the whole drain pipe.

Through adopting above-mentioned technical scheme, when the striking off board that the spiral set up makes striking off the board clear up the incrustation scale in to the drain pipe, strike off the board more laborsaving, the drain pipe inside wall has the striking off board of spiral simultaneously for the drain pipe when discharging sewage, can make sewage form the vortex, thereby make sewage velocity of flow faster when passing through the drain pipe.

Optionally, one of them the drain pipe is kept away from the one end of connecting pipe is the water inlet, another the drain pipe is kept away from the one end of connecting pipe is the delivery port, the guiding inclined plane has been seted up on the striking off plate, is close to one end of water inlet the guiding inclined plane on the striking off plate is towards one side setting of water inlet, is close to one end of delivery port the guiding inclined plane on the striking off plate deviates from one side setting of delivery port.

Through adopting above-mentioned technical scheme, the setting of guide inclined plane is convenient for strike off the incrustation scale that the board was scraped off along with sewage washes away, reduces sewage and piles up on striking off the board, and the setting of guide inclined plane is convenient for sewage more quick formation vortex simultaneously.

Optionally, the driving part includes driving gear, drive tooth group and driven gear, the driving gear with rotate the coaxial fixed connection of seat, drive tooth group rotate connect just one side of drive tooth group with the driving gear meshing, the opposite side with driven gear meshing, driven gear with rotate the coaxial fixed connection of ring.

Through adopting above-mentioned technical scheme, when sewage passes through clean leaf and drives the rotation seat and rotate, the driving gear rotates along with rotating seat synchronous rotation driving gear and drives the drive tooth group and rotate, and the drive tooth group rotates and drives driven gear and the synchronous rotation of swivel becket to make when sewage passes through the connecting pipe, clean impeller accomplishes the clearance to the connecting pipe, still drive simultaneously and strike off the piece and clear up the drain pipe.

Optionally, a connection structure is arranged on the axis of the rotating seat, and the connection structure is used for driving the rotating seat to rotate through external equipment.

Through adopting above-mentioned technical scheme, when the drain pipe is sealed off completely by the foreign matter, connection structure's setting makes the rotation seat can adopt external equipment to drive the rotation seat and rotate, rotates the seat and rotates the striking off board that alright drive spiral, alright carry the foreign matter, dredge the drain pipe.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the cooperation of drain pipe, connecting pipe, clean impeller, scraping part and driving medium for the main pipe body is when discharging sewage, and clean impeller can be by oneself clear up incrustation scale, the pollutant in the connecting pipe, and clean impeller can also drive scraping part through the driving medium and clear up incrustation scale, the pollutant in the connecting pipe simultaneously, has thus reached the unobstructed effect of keeping the main pipe body;

2. through being the spiral setting with the striking off board, not only make the striking off board clear up the incrustation scale in the drain pipe, strike off the board more laborsaving, the drain pipe inside wall has the striking off board of spiral simultaneously for when the drain pipe is discharged sewage, can make sewage form the vortex, thereby make sewage velocity of flow faster when passing through the drain pipe;

3. through being provided with connection structure on the axis of rotating the seat for when being blocked by the foreign matter completely in the drain pipe, can adopt external equipment to drive to rotate the seat, the striking off board that the reuse spiral set up carries the foreign matter, thereby dredge the drain pipe.

Drawings

Fig. 1 is a schematic structural diagram of a building water supply and drainage device with a self-dredging function in the embodiment.

Fig. 2 is a cross-sectional view at A-A in fig. 1.

Fig. 3 is a schematic view of the structure of the cleaning impeller in this embodiment.

Fig. 4 is a cross-sectional view at B-B in fig. 1.

Fig. 5 is an enlarged view at C in fig. 4.

Fig. 6 is a schematic structural view of the scraper in the present embodiment.

Reference numerals illustrate:

1. a main pipe body; 11. a drain pipe; 12. a connecting pipe; 2. a cleaning assembly; 21. cleaning the impeller; 211. a rotating seat; 212. cleaning the leaves; 213. cleaning teeth; 22. a scraper; 221. a rotating ring; 222. a scraping plate; 223. a support rod; 224. a guide slope; 3. a transmission member; 31. a drive gear; 32. a drive tooth set; 321. a transmission gear; 33. a driven gear; 4. a connection structure; 41. and a connecting groove.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-5.

The embodiment of the application discloses a building water supply and drainage device with a self-dredging function.

Referring to fig. 1 and 2, a building water supply and drainage device with a self-dredging function includes a main pipe body 1, a cleaning assembly 2, and a transmission member 3. The main pipe body 1 comprises two sections of drain pipes 11, a connecting pipe 12 is communicated between the two sections of drain pipes 11, and an included angle between the length directions of the two sections of drain pipes 11 is smaller than 180 degrees. The cleaning assembly 2 comprises a cleaning impeller 21 and a scraping piece 22, the cleaning impeller 21 is rotatably connected in the connecting pipe 12, the edge of the cleaning impeller 21 is abutted against the inner wall of the connecting pipe 12, and the transmission piece 3 is arranged between the cleaning impeller 21 and the scraping piece 22, so that the scraping piece 22 is driven to rotate when the cleaning impeller 21 rotates. The main pipe body 1 can automatically clean scale and pollutants in the drain pipe 11 and the connecting pipe 12 when sewage is discharged by utilizing the cooperation of the cleaning impeller 21, the scraping piece 22 and the transmission piece 3, so that the pipeline of the main pipe body 1 is kept unobstructed.

The main pipe body 1 is an elbow pipe, the included angle between the two sections of drain pipes 11 in the length direction in this embodiment is 90 degrees, and the included angle between the two sections of drain pipes 11 in the length direction can be set to 30 degrees, 120 degrees and the like according to design requirements.

The bending part of the bent pipe is easy to accumulate pollutants, namely the connecting pipe 12 in the embodiment is easy to accumulate pollutants, so that the cleaning impeller 21 is arranged in the embodiment, when sewage passes through the connecting pipe 12, the sewage drives the cleaning impeller 21 to rotate, and when the cleaning impeller 21 rotates, the pollutants accumulated at the connecting pipe 12 are cleaned.

Referring to fig. 1 and 3, the cleaning impeller 21 includes a rotation seat 211, the rotation seat 211 is rotatably connected to the connection pipe 12, a cleaning blade 212 is connected to the rotation seat 211 in the circumferential direction, the inner wall of the connection pipe 12 is arc-shaped, when the arc-shaped inner wall of the connection pipe 12 just makes the cleaning blade 212 rotate, the edge of the cleaning blade 212 abuts against the inner wall of the connection pipe 12, one end of the cleaning blade 212 is fixedly connected to the rotation seat 211, and the other end of the cleaning blade 212 can abut against the arc-shaped inner wall of the connection pipe 12 when rotating.

When sewage passes through the connecting pipe 12, the sewage impacts on the cleaning blade 212 to drive the rotating seat 211 to rotate, and the cleaning blade 212 and the rotating seat 211 continuously rotate by utilizing continuous flow of the sewage, so that the cleaning blade 212 cleans pollutants accumulated at the connecting pipe 12.

The cleaning blade 212 is in a bending arrangement, one protruding side of the cleaning blade 212 faces the rotating direction of the cleaning blade 212, and the bent cleaning blade 212 can bear a part of sewage, so that the impact generated by the sewage can be utilized to a greater extent, and the sewage can be conveniently utilized to impact the cleaning blade 212 to drive the rotating seat 211 to rotate.

The part that clean leaf 212 buckled has elasticity, and elastic clean leaf 212 is convenient for can produce the buffering when bearing sewage impact, and clean leaf 212 is when rotating simultaneously, and clean leaf 212's edge receives the effect butt of centrifugal force on connecting pipe 12 inner wall to strike off the pollutant of piling up in the connecting pipe 12, if the pollutant of piling up in the connecting pipe 12 is great, the part of buckling can dodge again, clears up through cleaning leaf 212 multiple striking off.

In an alternative embodiment, the end of the cleaning blade 212 away from the rotating seat 211 is provided with a cleaning tooth 213, and the sharp portion of the cleaning tooth 213 abuts against the inner wall of the connecting tube 12, so that the cleaning blade 212 is convenient to scrape off the pollutant accumulated in the connecting tube 12 by using the sharp portion of the cleaning tooth 213.

And the cleaning teeth 213 on the adjacent cleaning blades 212 are staggered, and the staggered cleaning teeth 213 reduce the dead zone where the pollutants at the gaps between the cleaning teeth 213 cannot be cleaned, so that the cleaning blades 212 scrape the pollutants accumulated in the connecting pipe 12 more cleanly.

The rotating base 211 is connected with the transmission member 3, so that the scraping member 22 can be driven to rotate by the transmission member 3 when the rotating base 211 rotates.

The driving member 3 includes a driving gear 31, a driving gear set 32, and a driven gear 33, the driving gear 31 is fixedly connected with the rotating base 211 coaxially, the driving gear set 32 is rotatably connected to the connecting pipe 12, one side of the driving gear set 32 is meshed with the driving gear 31, the other side is meshed with the driven gear 33, and the driven gear 33 is connected with the scraping member 22.

The drive gear group 32 in this embodiment comprises two drive gears 321, and in other embodiments the number of drive gears 321 may be increased or decreased accordingly, depending on the arrangement of the cleaning impeller 21 and scraper 22.

When the sewage passes through the cleaning blade 212 to drive the rotation seat 211 to rotate, the driving gear 31 rotates along with the synchronous rotation of the rotation seat 211 to drive the transmission gear set 32 to rotate, and the transmission gear set 32 rotates to drive the driven gear 33 and the scraping piece 22 to synchronously rotate, so that when the sewage passes through the connecting pipe 12, the cleaning impeller 21 completes cleaning the connecting pipe 12, and meanwhile, the scraping piece 22 is driven to clean the drain pipe 11.

Referring to fig. 4 and 5, in the present embodiment, two scraping members 22 are provided, the two scraping members 22 are rotatably connected in the two sections of the drain pipes 11 in a one-to-one correspondence, the scraping members 22 rotate around the axis of the drain pipe 11, and the scraping members 22 abut against the inner wall of the drain pipe 11.

The scraping member 22 comprises a rotary ring 221 and a scraping plate 222, the rotary ring 221 is rotatably connected to the drain pipe 11, and each section of connection position of the rotary ring 221 along the length direction of the drain pipe 11 is provided with the rotary ring 221, wherein the rotary ring 221 closest to the connecting pipe 12 is fixedly connected with the driven gear 33. The scraping plate 222 is abutted against the inner side wall of the drain pipe 11, and the scraping plate 222 is fixedly connected with the rotating ring 221.

By utilizing the cooperation of the driving gear 31, the transmission gear group 32 and the driven gear 33, the rotating ring 221 is driven to rotate, and the rotating ring 221 drives the scraping plate 222 to rotate on the inner side wall of the drain pipe 11, so that the scale adsorbed on the inner wall of the drain pipe 11 is scraped in the rotating process of the scraping plate 222, and the smoothness of the drain pipe 11 is maintained.

Referring to fig. 5 and 6, in an alternative embodiment, a plurality of scraping plates 222 are provided, and the plurality of scraping plates 222 are arranged so that the scraping plates 222 clean the scale in the drain pipe 11 more cleanly. A supporting rod 223 is fixedly connected between the plurality of scraping plates 222, the end part of the supporting rod 223 is fixedly connected with the rotating ring 221, and the supporting rod 223 enables the scraping plates 222 on the inner side wall of the drain pipe 11 to be more stable when moving.

In this embodiment, two scraping plates 222 are provided, but three or four may be provided in other embodiments, the two scraping plates 222 are uniformly distributed along the circumferential direction of the rotating ring 221, and the two scraping plates 222 are fixedly connected to the rotating ring 221. The scale adsorbed on the inner wall of the drain pipe 11 is scraped by the two scraping plates 222, so that the cleaning of the scale in the drain pipe 11 by the scraping plates 222 is cleaner.

In this embodiment, two support rods 223 are also provided, and the two support rods 223 are symmetrically disposed about the axis of the drain pipe 11, so that the support of the support rods 223 on the scraping plate 222 is more uniform.

The scraping plates 222 are spirally arranged, and the spirally arranged scraping plates 222 are uniformly distributed on the whole drain pipe 11. When the scraper 222 is spirally arranged and the rotating ring 221 drives the scraper 222 to rotate, the scraper 222 spirally rotates, so that the whole scraper 222 rotates more smoothly, meanwhile, when the scraper 222 scrapes the scale adsorbed on the inner wall of the drain pipe 11, the scraper 222 can generate inclined scraping force, so that the scale can be scraped off more easily, and the scraper 222 spirally rotates more smoothly and is scraped more easily.

Meanwhile, when the sewage is discharged by the drain pipe 11, the sewage close to the pipe wall of the drain pipe 11 is guided by the spiral of the scraping plate 222, so that the sewage forms vortex, and the flow speed of the sewage is faster when the sewage passes through the drain pipe 11.

In order to make the scraping plate 222 have better effect of scraping scale and guiding sewage to form vortex, the scraping plate 222 is also provided with a guiding inclined plane 224.

One end of one drain pipe 11 far away from the connecting pipe 12 is a water inlet, one end of the other drain pipe 11 far away from the connecting pipe 12 is a water outlet, a guiding inclined plane 224 on a scraping plate 222 close to one end of the water inlet is arranged towards one side of the water inlet, a guiding inclined plane 224 on the scraping plate 222 close to one end of the water outlet is arranged away from one side of the water outlet, and one end of the guiding inclined plane 224 close to the drain pipe 11 is attached to the inner side wall of the drain pipe 11. The contact area between the scraping plate 222 and the scale is reduced when the scraping plate 222 scrapes the scale, so that the pressure of the scraping plate 222 on the scale is increased, and the scraping plate 222 can scrape the scale more easily.

Meanwhile, the sewage close to the pipe wall of the drain pipe 11 can flow downwards in a spiral mode along the guide inclined plane 224 by the guide inclined plane 224 of the scale, so that the sewage can flow more smoothly, vortex can be formed more quickly by the sewage, and the sewage discharge is accelerated.

Referring to fig. 3, in an alternative embodiment, a connection structure 4 is disposed on an axis of the rotating base 211, and the connection structure 4 is used to drive the rotating base 211 to rotate by an external device.

In the present embodiment, the connection structure 4 is a connection groove 41, and the connection groove 41 is a hexagon socket. In other embodiments, the connection interface may be a bump, a snap-fit block, or the like. An external device, such as a motor, using a corresponding connector may drive the rotation base 211 to rotate.

When the drain pipe 11 is completely plugged by the foreign matters, the sewage in the drain pipe 11 and the connecting pipe 12 does not flow at this time, so that the cleaning impeller 21 cannot rotate by means of the sewage, at this time, the external driving equipment can be utilized to drive the rotating seat 211 to rotate through the connecting groove 41, the rotating seat 211 rotates to drive the driving gear 31 to rotate, the driving gear 31 rotates to drive the transmission gear set 32 and the driven gear 33 to rotate, the driven gear 33 rotates to drive the rotating ring 221 and the scraping plate 222 to rotate, and the scraping plate 222 is in a spiral arrangement, so that the foreign matters can be guided to move from the water inlet to the water outlet in the rotating process by the scraping plate 222.

When the foreign matter moves to the connecting pipe 12, the end of the elastic cleaning blade 212 will abut against the foreign matter, and the end of the cleaning blade 212 will bend towards the rotating seat 211, so that the gap between the cleaning blade 212 and the inner wall of the connecting pipe 12 can allow the foreign matter to pass through, and the continuously rotating cleaning blade 212 will continuously move the foreign matter towards the water outlet end until the foreign matter is sent into the next section of the drain pipe 11. The drain pipe 11 of the next stage discharges foreign matter from the water outlet by using the scraping plate 222 which is spirally arranged.

The setting of spread groove 41 makes the rotation seat 211 can adopt external equipment to drive and rotate, rotates the scraper 222 rotation that the rotation seat 211 rotated alright drive spiral, alright carry the foreign matter, and the kink that clean leaf 212 elasticity set up has been given way and has been carried the foreign matter simultaneously to accomplish and dredge the pipeline.

The implementation principle of the building water supply and drainage device with the self-dredging function is as follows: when the main pipe body 1 discharges sewage, the sewage first passes through the drain pipe 11, and when the sewage flows in the drain pipe 11, the sewage forms a vortex along with the rotation direction of the scraping plate 222 in the drain pipe 11, the sewage discharge speed of the vortex is faster, and then the sewage is conveyed into the connecting pipe 12.

At this time, the fast flowing sewage drives the cleaning blade 212 to rotate, and the inner wall of the connecting pipe 12 is cleaned in the process of the rotation of the cleaning blade 212, so that the blocking caused by the accumulation of pollutants in the connecting pipe 12 is avoided.

When the cleaning blade 212 rotates, the rotating seat 211 is driven to rotate, the driving gear 31 is driven to rotate by the rotating seat 211, the driving gear 31 is driven to rotate by the driving gear set 32 and the driven gear 33, the rotating rod and the scraping plate 222 are driven to rotate by the driven gear 33, and the scraping plate 222 scrapes the inner wall of the drain pipe 11, so that the inner wall of the drain pipe 11 is prevented from adsorbing scale.

The main pipe body 1 can automatically clean scale and pollutants in the drain pipe 11 and the connecting pipe 12 when sewage is discharged by utilizing the cooperation of the cleaning impeller 21, the scraping piece 22 and the transmission piece 3, so that the smoothness of the pipeline is maintained.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. Building plumbing installation with from dredging function, its characterized in that includes:

the main pipe body (1) comprises two sections of drain pipes (11), a connecting pipe (12) is communicated between the two sections of drain pipes (11), and an included angle between the two sections of drain pipes (11) in the length direction is smaller than 180 degrees;

the cleaning assembly (2) comprises cleaning impellers (21) and scraping pieces (22), wherein the cleaning impellers (21) are rotationally connected in the connecting pipe (12), the edges of the cleaning impellers (21) are abutted to the inner wall of the connecting pipe (12), the number of the scraping pieces (22) is two, the two scraping pieces (22) are rotationally connected in the two sections of the drain pipes (11) in a one-to-one correspondence manner, the scraping pieces (22) rotate around the axis of the drain pipes (11), and the scraping pieces (22) are abutted to the inner wall of the drain pipes (11);

the transmission part (3) is arranged between the cleaning impeller (21) and the scraping part (22), so that the cleaning impeller (21) drives the scraping part (22) to rotate when rotating.

2. The building water supply and drainage device with a self-dredging function according to claim 1, wherein: the connecting pipe (12) is circular arc, clean impeller (21) are including rotating seat (211), rotate seat (211) rotation and connect on connecting pipe (12), be connected with clean leaf (212) in the circumference of rotating seat (211), the one end fixed connection of clean leaf (212) is in rotate on seat (211), can the butt be in when the other end rotates on connecting pipe (12) circular arc inner wall, rotate seat (211) with driving medium (3) are connected.

3. The building water supply and drainage device with a self-dredging function according to claim 2, wherein: the cleaning blade (212) is arranged in a bending mode, the bending portion of the cleaning blade (212) is elastic, and one protruding side of the cleaning blade (212) faces to the rotating direction of the cleaning blade (212).

4. A building water supply and drainage device with a self-dredging function according to claim 2 or 3, characterized in that: one end of the cleaning blade (212) far away from the rotating seat (211) is provided with cleaning teeth (213), and the cleaning teeth (213) on the adjacent cleaning blade (212) are mutually staggered.

5. A building water supply and drainage device with a self-dredging function according to claim 3, wherein: the scraping piece (22) comprises a rotating ring (221) and a scraping plate (222), the rotating ring (221) is rotationally connected to the drain pipe (11), the rotating ring (221) is connected with the transmission piece (3), the scraping plate (222) is abutted to the inner side wall of the drain pipe (11), and the scraping plate (222) is fixedly connected with the rotating ring (221).

6. The building water supply and drainage device with a self-dredging function according to claim 5, wherein: the scraping plates (222) are arranged in a plurality, the scraping plates (222) are uniformly distributed along the circumferential direction of the rotating ring (221), and the scraping plates (222) are fixedly connected to the rotating ring (221).

7. The building water supply and drainage device with a self-dredging function according to claim 5, wherein: the scraping plates (222) are spirally arranged, and the spirally arranged scraping plates (222) are distributed on the whole drain pipe (11).

8. The building water supply and drainage device with a self-dredging function according to claim 7, wherein: the axis of the rotating seat (211) is provided with a connecting structure (4), and the connecting structure (4) is used for driving the rotating seat (211) to rotate through external equipment.

9. The building water supply and drainage device with a self-dredging function according to claim 5, wherein: one of them drain pipe (11) is kept away from the one end of connecting pipe (12) is the water inlet, and another drain pipe (11) is kept away from the one end of connecting pipe (12) is the delivery port, guiding inclined plane (224) have been seted up on striking off board (222), be close to on the striking off board (222) of water inlet one end guiding inclined plane (224) orientation one side of water inlet sets up, is close to on the striking off board (222) of delivery port one end guiding inclined plane (224) deviates from one side of delivery port sets up.

10. A building water supply and drainage device with self-dredging function according to any one of claims 5-9, characterized in that: the transmission piece (3) comprises a driving gear (31), a transmission gear group (32) and a driven gear (33), wherein the driving gear (31) is fixedly connected with the rotating seat (211) in a coaxial mode, the transmission gear group (32) is rotationally connected to the connecting pipe (12) and one side of the transmission gear group (32) is meshed with the driving gear (31), the other side of the transmission gear group is meshed with the driven gear (33), and the driven gear (33) is fixedly connected with the rotating ring (221) in a coaxial mode.