Household drainage hub

Abstract

The invention relates to the technical field of household drainage pipelines, in particular to a household drainage hub which comprises a drainage pipe used for being communicated with a building drainage vertical pipe, an indoor drainage hub used for being communicated with the drainage pipe and at least one indoor drainage branch pipe communicated with the indoor drainage hub. A first air and water return prevention assembly is arranged at the position, close to the position connected with the indoor drainage hub, in the drainage pipe. The anti-reverse-air structure of the drainage pipeline has the effect that the anti-reverse-air structure of the drainage pipeline can be suitable for a home-entry drainage system with multiple intersected branches.

Description

Technical Field

[0001] This application relates to the technical field of household drainage pipelines, and in particular to a household drainage hub. Background Art

[0002] In modern household drainage systems, domestic wastewater generated in areas such as kitchens, bathrooms, laundries, and balconies is collected through each indoor drainage branch pipe and converges into the discharge pipe, and finally discharged into the municipal pipe network through the outdoor horizontal pipe of the building drainage riser and the municipal sewage pipe. Since gas is emitted during the drainage process, a negative pressure environment is easily formed inside the pipeline, causing malodorous gases such as hydrogen sulfide and methane in the sewer to backflow into the household through the branch pipes, leading to health hazards and problems with living comfort.

[0003] In related technologies, the indoor drainage branch pipe is connected to the discharge pipe through a tee / four-way valve, and an anti-backflow structure is arranged inside the indoor drainage branch pipe. The anti-backflow structure mainly realizes one-way diversion through structures such as a floating ball seal and a baffle, thereby preventing odor gases from returning to the household.

[0004] In view of the above related technologies, the discharge pipe of the household, as the core node where multiple branches converge, has frequently changing water flow directions, large pressure fluctuations inside, and is in a semi-full or waterlogged state for a long time. Traditional branch anti-backflow devices are difficult to adapt to the complex working conditions of the main drainage pipe, which becomes the crux of odor backflow. Moreover, it is easy to be blocked at the tee / four-way valve node, and it is inconvenient to dredge and clean. At the same time, although the existing anti-backflow structures have achieved certain effects in branch anti-backflow, they cannot adapt to the discharge pipe where multiple branches converge. Summary of the Invention

[0005] In order to enable the anti-backflow structure of the drainage pipeline to be applicable to the household drainage system where multiple branches converge, this application provides a household drainage hub.

[0006] A household drainage hub provided by this application adopts the following technical solutions: A household drainage hub includes a discharge pipe for connecting to a building drainage riser, an indoor drainage hub for connecting to the discharge pipe, and at least one indoor drainage branch pipe connected to the indoor drainage hub; A first anti-backflow and backwater assembly is provided inside the discharge pipe near the position where it connects to the indoor drainage hub.

[0007] By adopting the above technical solution, a first anti-backflow and anti-water component is arranged inside the discharge pipe near the position connecting to the indoor drainage hub, which can directly carry out anti-backflow treatment for the core node where multiple branches of the discharge pipe converge. Compared with the traditional anti-backflow structure arranged at the end of each indoor drainage branch pipe, it can better adapt to the complex working conditions of frequent changes in the water flow direction, large pressure fluctuations, and long-term semi-full or water accumulation inside the discharge pipe, thus more effectively preventing malodorous gases such as hydrogen sulfide and methane in the sewer from flowing back into the indoor through the discharge pipe. Since the internal structure of the three-way / four-way valve is complex, the water flow is easily blocked when passing through, affecting the drainage speed. In this solution, the setting of the indoor drainage branch pipe replaces the three-way / four-way valve, increasing the cross-sectional area of the pipeline interior. The flow velocity of the water flow in the pipeline is relatively stable and not easy to form eddies, and impurities and dirt are not easy to deposit and accumulate in the pipeline, that is, it not only improves the drainage efficiency but also facilitates dredging. Compared with the three-way / four-way valve with a complex internal structure, the setting of the branch pipe can smoothly discharge the sundries carried in the wastewater, reducing the possibility of blockage of the drainage pipeline, making the domestic wastewater flow more smoothly from the indoor drainage branch pipe through the indoor drainage hub to the discharge pipe, reducing the jamming and backlog of the water flow, and improving the drainage efficiency of the entire household drainage system.

[0008] Further, the first anti-backflow and anti-water component is detachably connected to the inside of the discharge pipe, the indoor drainage hub is provided with a maintenance opening, and the indoor drainage hub is provided with a sealing component at the top for sealing the maintenance opening.

[0009] By adopting the above technical solution, the indoor drainage hub is provided with a maintenance opening, which provides a passage for maintenance personnel to inspect and maintain the inside of the pipeline. Maintenance personnel can directly observe the situation inside the pipeline through the maintenance opening and timely discover the problems, without having to detect the internal condition of the pipeline through other complex methods. The anti-backflow and anti-water component is detachably connected to the inside of the discharge pipe. When the equipment fails or the components age, it is not necessary to disassemble the entire drainage pipeline system on a large scale. Maintenance personnel can conveniently take out the anti-backflow and anti-water component from the maintenance opening for inspection, repair or replacement, reducing the maintenance cost and difficulty. The sealing component at the top of the indoor drainage hub is used to cover the maintenance opening, which can prevent sundries, dust, etc. from entering the maintenance opening and avoid them falling into the pipeline interior to cause blockage or damage to the components inside the pipeline. At the same time, the sealing component also plays a certain sealing role to prevent peculiar smells from emitting from the maintenance opening and keep the indoor environment clean and hygienic.

[0010] Further, the bottom height of the indoor drainage branch pipe is higher than the bottom height of the discharge pipe, thus forming a height difference H1. The water flow generates water pressure through the height difference H1 to force the first anti-backflow and anti-water component to open.

[0011] By adopting the above technical solution, when draining water through one or more indoor drainage branch pipes, the height of the indoor drainage branch pipe being higher than the bottom height of the discharge pipe can enable the water in the indoor drainage branch pipe being drained to be preferentially discharged through the discharge pipe, and it is not easy to have the problem of sewage flowing into adjacent indoor drainage branch pipes. At the same time, the sewage opens the anti-backflow and anti-water component through the action of water pressure. Also, through the height difference H1 between the two, the sewage can reach the bottom of the indoor drainage branch pipe in the indoor drainage hub and open the first anti-backflow and anti-water component through water pressure before, avoiding the accumulation of water being too high and flowing into other indoor drainage branch pipes.

[0012] Furthermore, a water-blocking sleeve is detachably installed in the inspection opening of the indoor drainage hub, and the bottom height of the water-blocking sleeve is lower than the bottom height of the indoor drainage branch pipe, thereby forming a height difference H2.

[0013] By adopting the above technical solution, when the sewage is discharged from the indoor drainage branch pipe, it is blocked by the water-blocking sleeve, first impacts the water-blocking sleeve and then falls into the bottom of the drainage hub, and will not directly rush into other pipes, also avoiding the water flow being too fast and reducing the impact on the first anti-backflow and anti-water component installed on the discharge pipe.

[0014] Furthermore, the sealing component includes a second anti-backflow and anti-water component and a covering component. The second anti-backflow and anti-water component is located in the inspection opening and is detachably connected to the indoor drainage hub. The covering component includes a covering top plate and a mounting frame body for placing the covering top plate, and the covering top plate is provided with a water-falling hole.

[0015] By adopting the above technical solution, a floor drain can be formed at the upper end of the inspection opening. The second anti-backflow and anti-water component prevents gas or sewage from gushing out of the indoor drainage hub. At the same time, the water-falling hole on the covering component can collect the water above and discharge it into the indoor drainage hub through the second anti-backflow and anti-water component and then be discharged through the discharge pipe.

[0016] Furthermore, the second anti-backflow and anti-water component includes an inner shell, a reset connecting rod and a sealing cap. The inner shell is detachably connected to the inside of the indoor drainage hub and extends into the inspection opening. The reset connecting rod is installed at the central axis position of the inner shell, and the sealing cap is fixedly connected to the lower end of the reset connecting rod.

[0017] By adopting the above technical solution, the inner housing is coaxially installed inside the connecting housing to ensure the structural stability of the whole assembly. The reset connecting rod is installed at the central axis position of the inner housing, so that the sealing cap can maintain balance during movement and accurately cooperate with the corresponding part of the drainage pipe. The sealing cap is fixedly connected to the lower end of the reset connecting rod. When draining water, the pressure of the water flow will cause the sealing cap to open, allowing the water to pass through smoothly. After draining, under the action of the reset connecting rod, the sealing cap can quickly reset and tightly seal the drainage port, preventing the gas in the sewer from returning to the room along the pipe, thus avoiding the pollution of the room by peculiar smell and harmful gases.

[0018] Furthermore, the first anti-backflow and anti-water component includes an opening and closing structure and an installation collar for installing the opening and closing structure, and the installation collar is clamped to the inner wall of the discharge pipe.

[0019] By adopting the above technical solution, the installation collar is detachably connected to the inside of the discharge pipe, which is convenient for the installation and disassembly of the whole first anti-backflow and anti-water component. When overhauling, cleaning or replacing the first anti-backflow and anti-water component, the installation collar can be directly taken out of the discharge pipe, and the operation is relatively convenient.

[0020] Furthermore, the opening and closing structure includes a fixed baffle integrally connected to the installation collar and a movable baffle for blocking water. The fixed baffle has an opening that matches the movable baffle and allows water to flow through. A hinge seat for installing the movable baffle is provided at a position near the top inner wall of the discharge pipe. The movable baffle is provided with a movable shaft at its side edge, and the hinge seat is provided with a rotation groove for the movable shaft to be inserted and rotated.

[0021] By adopting the above technical solution, the movable baffle is matched with the hinge seat on the fixed baffle through the movable shaft. This connection method is simple and reliable, and is also convenient for the installation and replacement of the movable baffle. If the movable baffle is damaged, it can be removed and replaced only by disassembling the movable shaft, without large-scale disassembly of the whole structure. The connection method of the movable baffle through the hinge seat and the movable shaft can automatically adjust the angle according to the size and direction of the water flow in the discharge pipe. When the water flow is large, the movable baffle can automatically open a certain angle to make the drainage smoother and avoid the situation of poor drainage or even blockage caused by the obstruction of the water flow. When the water flow is small, the movable baffle can remain closed to better block the odor gas and adapt to the complex and changeable water flow state in the discharge pipe.

[0022] Furthermore, the movable baffle is inclined outward from the side connected to the hinge seat to the side far away from the indoor drainage hub, and the fixed baffle is provided with an extension part for abutting against the movable baffle at a position near the bottom side of the discharge pipe.

[0023] By adopting the above technical solution, an extension part is provided at the position of the fixed baffle near the bottom side of the discharge pipe to support the movable baffle. When the movable baffle is impacted by water flow or gas pressure, the extension part can resist the movable baffle to prevent it from shaking or shifting excessively, ensuring the stability and reliability of the anti-backflow and anti-water components. After the drainage is completed, under the action of its own gravity and the possible residual water pressure of the water flow, the movable baffle is more likely to return to the closed position relying on the inclined angle and the support of the extension part, realizing automatic reset, and can closely cooperate with the extension part to form a good seal, effectively preventing the foul smell gas in the sewer from flowing back into the household through the connection between the discharge pipe and the indoor drainage hub. The movable baffle is inclined outward from the side connected to the hinge seat to the side far away from the indoor drainage hub. The inclined setting can reasonably utilize the impact force of the water flow. When the sewage flows from the indoor drainage hub to the discharge pipe, the inclined baffle is easy to be flushed open, ensuring the smoothness of drainage; when the sewage has a tendency to flow from the discharge pipe to the indoor drainage hub, the impact force of the water flow makes the movable baffle fit more closely on the extension part, enhancing the blocking effect on the sewage and odor gas, and preventing the gas from leaking from the gap between the movable baffle and the discharge pipe.

[0024] Further, a counterweight is provided on the side of the movable baffle away from the extension part.

[0025] By adopting the above technical solution, the counterweight increases the weight of the movable baffle away from the hinge end, so that after the drainage is completed, the movable baffle can quickly and stably return to the closed position under the action of gravity, ensuring the effective blocking of the odor gas, improving the reliability of the anti-backflow structure, and reducing the possibility of odor backflow caused by the failure of the movable baffle to reset in time. During the drainage process, the impact force of the water flow may cause the movable baffle to swing to varying degrees. The counterweight can increase the stability of the movable baffle, so that it can maintain a relatively stable state when facing water flows with different flow rates and velocities, and will not be overly opened or shaken due to the impact of the water flow, thus better adapting to the complex and changeable water flow conditions in the discharge pipe and ensuring the effective blocking of the odor gas in various drainage situations.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. A plurality of indoor drainage branch pipes are circumferentially arranged on the indoor drainage hub, optimizing the drainage layout, making full use of space, reducing water flow impact, enhancing system stability, improving drainage efficiency, facilitating dredging, and a first anti-backflow and anti-water component is provided at the position of the discharge pipe close to the indoor drainage hub, and a second anti-backflow and anti-water component is provided in the indoor drainage hub, which can effectively prevent the backflow of foul smell gases such as hydrogen sulfide and methane in response to the complex working conditions of the multi-branch intersection core node, and avoid indoor pollution by odor and harmful gases; 2. The first anti-backflow and anti-water hammer component and the second anti-backflow and anti-water hammer component are detachably connected. The movable baffle of the first anti-backflow and anti-water hammer component can automatically adjust the angle according to the water flow size and direction. Cooperating with the extension part and the counterweight, it can adapt to the complex and changeable water flow and pressure conditions in the discharge pipe, ensuring stable operation. The second anti-backflow and anti-water hammer component has a stable structure, and the sealing cap can be opened during drainage and reset after drainage. 3. The indoor drainage hub is provided with a maintenance opening and a sealing component at the top. The maintenance opening facilitates maintenance personnel to check the internal situation of the pipeline. The detachable component facilitates inspection, repair or replacement without large-scale disassembly of the pipeline system when the equipment fails or components age, reducing the maintenance cost and difficulty. The sealing component can prevent sundries from falling into the maintenance opening and protect the internal components. Brief Description of the Drawings

[0027] Figure 1 It is a schematic diagram of the overall structure of a household drainage hub according to an embodiment of the present application.

[0028] Figure 2 It is a schematic sectional view of a household drainage hub according to an embodiment of the present application Figure 1 .

[0029] Figure 3 It is a side view of a household drainage hub according to an embodiment of the present application.

[0030] Figure 4 It is a schematic sectional view of the discharge pipe and the anti-backflow and anti-water hammer component according to an embodiment of the present application.

[0031] Figure 5 It is a schematic sectional view of a household drainage hub according to an embodiment of the present application Figure 2 .

[0032] Figure 6 It is a schematic sectional view of the second anti-backflow and anti-water hammer component according to an embodiment of the present application.

[0033] Figure 7 It is a schematic sectional view of the sealing component according to an embodiment of the present application.

[0034] Description of the Reference Numerals: 1, indoor drainage hub; 11, maintenance opening; 2, indoor drainage branch pipe; 3, discharge pipe; 4, first anti-backflow and anti-water hammer component; 41, opening and closing structure; 411, fixed baffle; 412, movable baffle; 4121, movable shaft; 4122, counterweight; 413, hinge seat; 4131, rotating groove; 42, mounting collar; 421, extension part; 5, sealing component; 51, second anti-backflow and anti-water hammer component; 511, inner housing; 512, reset connecting rod; 513, sealing cap; 52, covering component; 521, covering top plate; 5211, water inlet hole; 522, mounting frame; 6, water retaining sleeve; 61, clamping ring; 62, threaded sleeve. Detailed implementation manners

[0035] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the following further elaborates on the present application in conjunction with the accompanying drawings and embodiments. Figure 1-7 And embodiments, make a further detailed description of the present application.

[0036] An embodiment of the present application discloses a household drainage hub. Refer to Figure 1 And Figure 2 , the anti-backflow and anti-water-backflow structure of the household discharge pipe 3 includes an indoor drainage hub 1, an indoor drainage branch pipe 2, a discharge pipe 3, a first anti-backflow and anti-water-backflow component 4 and a sealing component 5. Among them, the discharge pipe 3 is used to connect to the building drainage riser, the indoor drainage hub 1 is used to connect to the discharge pipe 3, and the indoor drainage branch pipe 2 is used to connect to the indoor drainage hub 1.

[0037] In an embodiment of the present application, the number of indoor drainage branch pipes 2 is preferably three, and the indoor drainage branch pipes 2 are circumferentially arranged and vertically connected to the indoor drainage hub 1. A more reasonable distribution of each indoor drainage branch pipe 2 is the drainage path of each area such as the kitchen, bathroom, laundry room, balcony, etc., so that the layout of the drainage system avoids mutual interference between the indoor drainage branch pipes 2, ensures that the drainage of each area can smoothly flow into the indoor drainage hub 1, realizes the connection of multiple indoor drainage branch pipes 2, and forms a relatively stable drainage network structure.

[0038] The bottom height of the indoor drainage branch pipe 2 is higher than the bottom height of the discharge pipe 3 to form a height difference H1, and the water flow generates water pressure through the height difference H1 to force the first anti-backflow and anti-water-backflow component 4 to open. When one or more indoor drainage branch pipes 2 are draining, the fact that the height of the indoor drainage branch pipe 2 is higher than the bottom height of the discharge pipe 3 can make the water in the draining indoor drainage branch pipe 2 preferentially drain through the discharge pipe 3, and it is not easy to have the problem of sewage flowing into the adjacent indoor drainage branch pipe 2. At the same time, the sewage opens the anti-backflow and anti-water-backflow component through the action of water pressure. At the same time, through the height difference H1 between the two, the sewage can open the first anti-backflow and anti-water-backflow component 4 through water pressure before the height of the sewage in the indoor drainage hub 1 reaches the bottom of the indoor drainage branch pipe 2, avoiding the problem that the accumulated water is too high and flowing into other indoor drainage branch pipes 2.

[0039] Refer to Figure 2 And Figure 3 , the first anti-backflow and anti-water-backflow component 4 is detachably connected to the inside of the discharge pipe 3 at a position close to the connection with the indoor drainage hub 1, and the indoor drainage hub 1 has a maintenance opening 11. The maintenance opening 11 can, on the one hand, facilitate the installation and disassembly of the first anti-backflow and anti-water-backflow component 4. On the other hand, the maintenance opening 11 also provides a passage for maintenance personnel to inspect and maintain the inside of the pipeline. The maintenance personnel observe the internal situation of the pipeline through the maintenance opening 11 to timely find the problems.

[0040] Refer to Figure 3 AndFigure 4 The first anti-backflow and anti-water component 4 includes an opening and closing structure 41 and an installation collar 42. The installation collar 42 is inserted into the discharge pipe 3 for the installation of the opening and closing structure 41. The outer wall of the installation collar 42 is tightly abutted against the inner wall of the drain pipe to achieve clamping. When it is necessary to disassemble the first anti-backflow and anti-water component 4, the installation collar 42 can be pulled out.

[0041] The opening and closing structure 41 includes a fixed baffle 411 and a movable baffle 412. The fixed baffle 411 is integrally connected to the installation collar 42. The fixed baffle 411 surrounds the outside of the movable baffle 412 and has an opening that matches the movable baffle 412 and allows water to flow through. The fixed baffle 411 is integrally connected with a hinge seat 413 at a position close to the top inner wall of the discharge pipe 3. The movable baffle 412 is integrally connected with a movable shaft 4121 at the side edge that matches the hinge seat 413. The hinge seat 413 is provided with a rotation groove 4131 on the upper side for the insertion and rotational connection of the movable shaft 4121, so that the movable baffle 412 can not only rotate on the installation sleeve but also achieve the effect of being detachable.

[0042] The movable baffle 412 is inclined outward from the side connected to the hinge seat 413 to the side away from the indoor drainage hub 1. The installation collar 42 is provided with an extension 421 for abutting against the movable baffle 412 at a position close to the bottom side of the discharge pipe 3. The inclined setting can make reasonable use of the impact force of the water flow. When the sewage flows from the indoor drainage hub 1 to the discharge pipe 3, the inclined baffle is easily washed open, ensuring the smoothness of drainage. When the sewage has a tendency to flow from the discharge pipe 3 to the indoor drainage hub 1, the impact force of the water flow makes the movable baffle 412 fit more tightly on the extension 421, enhancing the blocking effect on sewage and odor gas. After the drainage ends, the movable baffle 412 is more likely to return to the closed position by relying on the inclined angle and the support of the extension 421 under the action of its own gravity and the possible remaining water pressure, realizing automatic reset, and can be closely matched with the extension 421 to form a good seal.

[0043] A counterweight 4122 is fixedly connected to the side of the movable baffle 412 away from the extension 421, so as to increase the weight of the movable baffle 412 away from the hinge end. After the drainage ends, the movable baffle 412 can quickly and stably return to the closed position under the action of gravity, ensuring the effective blocking of odor gas, improving the reliability of the anti-backflow structure, and reducing the possibility of odor backflow caused by the failure of the movable baffle 412 to reset in time.

[0044] Refer to Figure 5 and Figure 6, a water retaining sleeve 6 is detachably installed in the maintenance opening 11 of the indoor drainage hub 1. A clamping ring 61 is clamped and fixed at the top position of the indoor drainage hub 1. A threaded sleeve 62 for the threaded connection of the water retaining sleeve 6 is clamped and fixed on the inner wall of the clamping ring 61. The water retaining sleeve 6 is detachably connected to the inside of the indoor drainage hub 1 through the clamping ring 61 and the threaded sleeve 62.

[0045] The bottom height of the water retaining sleeve 6 is lower than the bottom height of the indoor drainage branch pipe 2, thus forming a height difference H2. When sewage is discharged from the indoor drainage branch pipe 2, it is blocked by the water retaining sleeve 6, first impacts the water retaining sleeve 6 and then falls into the bottom of the drainage hub, without directly flushing into other pipes, and also avoids too rapid water flow, reducing the impact on the first anti-backflow and anti-water component 4 installed on the discharge pipe 3.

[0046] The sealing component 5 includes a second anti-backflow and anti-water component 51 and a covering component 52. The second anti-backflow and anti-water component 51 is located in the maintenance opening 11 of the indoor drainage hub 1 and is detachably connected to the water retaining sleeve 6. The covering component 52 is installed above the second anti-backflow and anti-water component 51 and is used to cover the maintenance opening 11.

[0047] The second anti-backflow and anti-water component 51 includes an inner housing 511, a reset connecting rod 512 and a sealing cap 513. The inner housing 511 is coaxially arranged and extends into the water retaining sleeve 6, and the inner housing 511 is threadedly connected to the inner wall of the water retaining sleeve 6. The reset connecting rod 512 is installed at the central axis position of the inner housing 511, and the sealing cap 513 is fixedly connected to the lower end of the reset connecting rod 512. When draining water, the pressure of the water flow will cause the sealing cap 513 to open, allowing the water to pass through smoothly. After the drainage is over, under the action of the reset connecting rod 512, the sealing cap 513 can quickly reset and tightly seal the drainage port, preventing the gas in the sewer from flowing back into the room along the pipe, thereby avoiding the pollution of the room by peculiar smell and harmful gases.

[0048] Combined with Figure 7 , the covering component 52 is located at the top of the indoor drainage hub 1 and is used to cover the maintenance opening 11. The covering component 52 includes a covering top plate 521 and a mounting frame 522. The mounting frame 522 is installed on the ground and is located above the second anti-backflow and anti-water component 51. The covering top plate 521 is clamped on the mounting frame 522. Combined with Figure 1 , the covering top plate 521 is provided with a water falling hole 5211 on the top side. The water falling hole 5211 is aligned above the maintenance opening 11 and is communicated with the maintenance opening 11.

[0049] The covering component 52 prevents sundries, garbage, etc. from falling into the inspection opening 11, avoiding clogging the pipeline or damaging the second anti-backflow and anti-waterlogging component 51. The covering top plate 521 cooperates with the mounting frame 522 to form a closed structure, protecting the inspection opening 11 and the internal second anti-backflow and anti-waterlogging component 51. The covering component 52 is installed on the ground, and the covering top plate 521 is flush or coordinated with the surrounding ground.

[0050] The implementation principle of a household drainage hub in an embodiment of the present application is as follows: The indoor drainage hub 1 is circumferentially connected to three indoor drainage branch pipes 2 (such as areas like the kitchen, master bathroom, guest bathroom, etc.). The bottom of the branch pipe is higher than the bottom of the discharge pipe 3, forming a height difference H1. During drainage, the water flow in the branch pipe generates water pressure due to the height difference, forcing the first anti-backflow and anti-waterlogging component 4 in the discharge pipe 3 to open. The sewage preferentially flows through the discharge pipe 3 towards the building vertical pipe. Since the bottom of the branch pipe is higher than the water level inside the hub, it can prevent the sewage from flowing into adjacent branch pipes before being discharged, ensuring the independent and smooth drainage of each area.

[0051] This component is clamped to the discharge pipe 3 near the hub through the mounting collar 42. Its opening and closing structure 41 includes a fixed baffle 411 and a movable baffle 412. The movable baffle 412 is connected to the mounting collar 42 through a hinge seat 413 and is inclined towards the outlet direction of the discharge pipe 3. The bottom extension 421 is used to support the closing of the baffle. During drainage, the impact force of the water flow pushes open the inclined movable baffle 412, and the sewage is discharged smoothly. After the drainage ends, the movable baffle 412 automatically resets due to its own gravity (cooperating with the counterweight 4122) and the residual pressure, and closely adheres to the extension 421 to form a seal, preventing the odor or backflow in the vertical pipe from entering the household. The detachable design of the mounting collar 42 facilitates the maintenance of the component through the inspection opening 11 at the top of the hub.

[0052] A water blocking sleeve 6 is installed in the inspection opening 11 at the top end of the indoor drainage hub 1, and its bottom height is lower than the bottom of the branch pipe (height difference H2). When the sewage is discharged, it first impacts the water blocking sleeve 6 for buffering, reducing the direct impact on the first component and reducing the water flow noise. The second anti-backflow and anti-waterlogging component 51 (inner housing 511, reset connecting rod 512, sealing cap 513) in the inspection opening 11 is connected to the water blocking sleeve 6 through threads. During drainage, the water flow pressure pushes open the sealing cap 513, and after the drainage ends, the reset connecting rod 512 drives the sealing cap 513 to close, forming a second anti-backflow barrier.

[0053] The covering component 52 (covering top plate 521, mounting frame 522) covers the inspection opening 11. The water dropping hole 5211 on the top plate is aligned with the hub, allowing the ground drainage to flow in while blocking sundries from falling into the pipeline. The mounting frame 522 is fixed to the ground, making the covering top plate 521 flush with the ground, combining the functions of protection and aesthetics. The overall structure is connected through multiple detachable connections (threads, clamping, etc.), facilitating maintenance personnel to quickly maintain the internal components through the inspection opening 11, improving the reliability and usability of the system.

[0054] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A household drainage hub, characterized in that: It includes a discharge pipe (3) for connecting the building drainage riser, an indoor drainage hub (1) for connecting the discharge pipe (3), and at least one indoor drainage branch pipe (2) connected to the indoor drainage hub (1); A first anti-backflow and anti-water component (4) is provided inside the discharge pipe (3) near the position where it connects to the indoor drainage hub (1).

2. The household drainage hub according to claim 1, characterized in that: The first anti-backflow and anti-water component (4) is detachably connected inside the discharge pipe (3). The indoor drainage hub (1) is provided with an inspection opening (11), and a sealing component (5) for sealing the inspection opening (11) is provided at the top of the indoor drainage hub (1).

3. The household drainage hub according to claim 1, characterized in that: The bottom height of the indoor drainage branch pipe (2) is higher than the bottom height of the discharge pipe (3), thus forming a height difference H1. Water flow generates water pressure through the height difference H1 to force the first anti-backflow and anti-water component (4) to open.

4. The family drainage hub according to claim 2, characterized in that: A water-blocking sleeve (6) is detachably installed inside the inspection opening (11) of the indoor drainage hub (1). The bottom height of the water-blocking sleeve (6) is lower than the bottom height of the indoor drainage branch pipe (2), thus forming a height difference H2.

5. The household drainage hub according to claim 2, characterized in that: The sealing component (5) includes a second anti-backflow and anti-water component (51) and a covering component (52). The second anti-backflow and anti-water component (51) is located inside the inspection opening (11) and is detachably connected to the indoor drainage hub (1). The covering component (52) includes a covering top plate (521) and an installation frame body (522) for placing the covering top plate (521). The covering top plate (521) is provided with a water-drop hole (5211).

6. The household drainage hub according to claim 5, characterized in that: The second anti-backflow and anti-water component (51) includes an inner shell (511), a reset connecting rod (512), and a sealing cap (513). The inner shell (511) is detachably connected to the inside of the indoor drainage hub (1) and extends into the inspection opening (11). The reset connecting rod (512) is installed at the central axis position of the inner shell (511), and the sealing cap (513) is fixedly connected to the lower end of the reset connecting rod (512).

7. The household drainage hub according to claim 2, wherein: The first anti-backflow and anti-water component (4) includes an opening and closing structure (41) and an installation collar (42) for installing the opening and closing structure (41). The installation collar (42) is clamped on the inner wall of the discharge pipe (3).

8. A household drainage hub according to claim 7, characterized in that: The opening and closing structure (41) includes a fixed baffle (411) integrally connected to the installation collar (42) and a movable baffle (412) for blocking water. The fixed baffle (411) has an opening that matches the movable baffle (412) and allows water to flow through. A hinge seat (413) for installing the movable baffle (412) is provided at a position near the top side inner wall of the discharge pipe (3). The movable baffle (412) is provided with a movable shaft (4121) at its side edge. The hinge seat (413) is provided with a rotation groove (4131) for the movable shaft (4121) to be inserted and rotated.

9. The family drainage hub according to claim 8, wherein: The movable baffle (412) is arranged to incline outward from the side connected to the hinge seat (413) to the side far from the indoor drainage hub (1), and the fixed baffle (411) is provided with an extension part (421) for abutting against the movable baffle (412) at a position near the bottom side of the discharge pipe (3).

10. A household drainage hub according to claim 9, characterized in that: A counterweight (4122) is arranged on the side of the movable baffle (412) far from the extension part (421).

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